INTERNATIONAL UNION OF THEORETICAL AND APPLIED...

INTERNAT IONAL UNION OF THEORETICAL AND APPLIED MECHANICS

REPORT1971

IUTAM Building 404

Technical University of Denmark DK-2800, Denmark

REPORT 1971

lnstitvt B fUr Mechanik Ul"iversitot Stvttgart

A -1J5 I ;.o11- u

ATLAS B OGTR Y K & O FFSET

INTERNATIONAL UN ION OF THEORETICAL AND APPLIED

REPORT 1971

IUTAM Building 404

Technical University of Denmark DK-2800, Denmark

Bureau . Secretariat Past Officers Adhering Organizations Affiliated Organizations

CONTENTS

Members of the General Assembly Members of the Congress Committee Symposia Other Meetings Treasurer's report Representation in other organizations Donations .

Appendices :

Reports Report on the 4th session of the "Joint Ad Hoc Group for the Study of

Page 2 2 2 3 7 7 8 9

23 24 28 28

External Forces Affecting Ships" 30 Report on CODATA 31 Report on Intergovernmental Conference for the Establishment of a World Science Information System (UNISIST) 34

Statutes Statuts de !'Union Internationale de Mecanique Theorique et Appliquee 43 Resolution de 1' Assemblee Generate de Pallanza 48 Regles de Fonctionnement du Comite des Congres de IUT AM . 48 Statutes of the International Union of Theoretical and Applied Mechanics 49 Resolution of the General Assembly at Pallanza . 54 Rules of procedure for the Congress Committee of IUT AM 54

List of Publications 55 List of Addresses . 64

2 REPORT 1971

Bureau

The following members of the Bureau of IUT AM have been elected for the period November 1, 1968 to October 31, 1972:

Officers: Prof. W. T. Koiter (Netherlands) Prof. M. Roy (France) Prof. H. Gertler (Germany) Prof. F. I. Niordson (Denmark)

Members: Prof. N. J. Hoff (USA) Prof. M. J. Lighthill (UK) Prof. W. Olszak (Poland) Prof. L. I. Sedov (USSR)

President Vice-President Treasurer Secretary

Secretariat

IUT AM Secretariat Building 404 Technical University of Denmark Lundtoftevej 100 DK-2800 Lyngby Denmark Telephone: (01) 88 46 22 Cable: IUT AM COPH

Past Officers

Elected President Vice President Treasurer 1949 J. Peres R. V. Southwell H. L. Dryden

(France) (UK) .(USA) 1953 H. L. Dryden J. Peres G. Temple

(USA) (France) (UK) 1957 F. K. G. Odqvist H. L. Dryden G. Temple

(Sweden) (USA) (UK) 1961 G. Temple F. K. G. Odqvist W. T. Koiter

(UK) (Sweden) (Netherlands) 1965 M. Roy G. Temple W. T. Koiter

(France) (UK) (Netherlands)

Secretary J. M. Burger (Netherlands) F. A. v. d. Dungen (Belgium) M. Roy (France) M. Roy (France) H. Gertler (Germany)

INTERNATIONAL UNION OF THEORETICAL AND APPLIED MECHANICS 3

Adhering organizations Argentine (1959) Sociedad Argentina de Mecanica Teorica y Applicada Facultad de Ingenieria, Paseo Colon 850, Buenos Aires Chairman: Prof. Arturo Guzman Representative: Dr. Mario Gradowczyk A11stralia (1964) The Australian National Committee for Theoretical and Applied Mechanics of the Australian Academy of Science, P. 0. Box 216, Civic Square, ACT Au-stralia 2608 Chairman: Prof. J. R. M. Radok Representative: Prof. J. R. M. Radok Attstria (1951) Die Osterreichische Akademie der Wissenschaften, Dr. Ignaz Seipel Platz 2, A 1010 Wien President: Prof. Erich Schmid Secretary-General: Prof. Herbert Hunger Representative: Prof. Heinz Parkus Belgium (1949) Comite National de Mecanique Theorique et Appliquee de la Classe des Sciences de I' Academie Royale de Belgique, Palais des Academies, Bruxelles President: Prof. B. Fraeijs de Veubeke Secretary: Prof. F. Haus Representatives: Prof. F. Buckens, Prof. B. Fraeijs de Veubeke, Prof. P. Janssens

Bulgaria (1969) Bulgarian National Committee for Theoretical and Applied Mechanics of the Bulgarian Academy of Sciences, ul. "7 noemvri" 1, Sofia President: Prof. G. Brankov Secretary: Prof. M. Kozarov Representatives: Prof. G. Brankov, Prof. B. Dolapchiev Canada (1963) The National Research Council of Canada, Ottawa 7, Ontario Chairman : Dr. James F. Keffer Representatives : Dr. J. H. Blackwell, Dr. P. G. Glockner, Dr. James F. Keffer, Dr. F. P. J. Rimrott Czecho.rlovakia (1949) The Czechoslovak Committee of Theoretical and Applied Mechanics of the Czechoslovak Academy of Sciences (year of change of organization : 1957), Puskinovo nam. 9, Praha 6 President: Prof. Jan Jerie Representatives: Prof. J. Kozesnik, Prof. Jan )erie

4 REPORT 1971

Denmark (1949) The Academy of Technical Sciences of Denmark (Akademiet for de Tekniske Videnskaber), Lundtoftevej 266, 2800 Lyngby President: Prof. Niels Meyer, Gnmnevang 55, 2970 Hersholm Secretary: Mr. Bjerre Lavesen Representatives : Prof. Frithiof Niordson, Prof. Frank Engelund

Finland (1952) The Finnish National Committee on Mechanics, University of Technology, Otaniemi, Helsinki Chairman: Prof. S. E. Stenij Representative: Prof. Matti A. Ranta

France (1949) Comite National Francais de Mecanique, 55, Boulevard Malesherbes, Paris VIII• Representatives: Prof. Luc Gauthier, Prof. Paul Germain, Ing. Gen. Robert Legendre, Prof. Maurice Roy

West Germany - BRD (1950) The National Committee of BRD within the Gesellschaft fiir Angewandte Mathematik und Mechanik, Universitat Hamburg, lnstitut fiir Schiffbau, 2 Ham-burg 33, Lammersieth 90 Chairman: Prof. Dr. K. Wieghardt Representatives: Prof. E. Becker, Prof. H. Gorder, Prof. E. Mettler, Prof. E. Peste!

Hungary (1948) Hungarian National Committee for IUT AM of the Hungarian Academy of Sciences, Budapest President: Prof. Istvan Salyi Secretary: Prof. Janos SzabO Representative : Prof. Istvan Salyi

India (1950) The Indian National Committee for Theoretical and Applied Mechanics of the Indian National Science Academy, Bahadur Shah Zafar Marg, New Delhi-1 Chairman: Prof. P. L. Bhatnagar Representative : Prof. P. L. Bhatnagar

Israel (1950) The Israel Academy of Sciences and Humanities, Jerusalem P. 0. Box 4040 President: Prof. Gershom Scholem Representative : Prof. M. Reiner


Italy (1949) Associazione Italiana di Meccanica Teorica ed Applicata, Consiglio Nazionale delle Ricerche, Piazzale delle Scienze, 7, 00100 Roma President: Prof. Giulio Supino Secretary: Prof. Giovanni Bianchi Representatives: Prof. Bruno Finzi, Prof. Giulio Supino

Japan (1951) The National Committee for Theoretical and Applied Mechanics of the Science Council of Japan, 22-34 Roppongi 7-chome, Minato-ku, Tokyo, 106 Japan President: Prof. ltiro Tani Representativ.es: Prof. ltiro Tani, Prof. Isao lmai, Prof. Masao Yoshiki

Netherlands (1952) Section for Mechanics of the Division of Applied Sciences of the Royal Institute of Engineers, Technische Hogeschool Twente, Postbus 217, Enschede President: Prof. Dr. ir. P. J. Zandbergen Secretary: Prof. ir. C. de Pater Representatives: Prof. ir. C. de Pater, Prof. ir. J. 0. Hinze

Norway (1949) The National Committee on Theoretical and Applied Mechanics of the Norwe-gian Academy of Sciences and Letters, University of Oslo, Blindern, Oslo 3 President: Prof. Enok Palm Representative: Prof. Enok Palm

Poland 1(1952) The Polish Academy of Sciences, Palac Kultury i Nauki, Warsaw President: Prof. W. Trzebiatowski Secretary-General: Prof. J. Kaczmarek Representatives: Prof. W. Nowacki, Prof. W. Olszak, Prof. W. Fiszdon

Portugal (1968) The Portugese National Committee of Theoretical and Applied Mechanics, Universidade Tecnica de Lisboa, Avenida Rovisco Pais Chairman: Prof. E. R. de Arantes e Oliveira Secretary: Prof. A. Tovar de Lemos Representative: Prof. E. R. de Arantes e Oliveira

Rttmania (1956) Institut de Mecanique Appliquee de 1' Academie de la RPR, Bucarest Representative: Prof. Elie Carafoli

Spain (1950) The National Institute of Aerospace Technology "Esteban Terradas" (lnstituto Nacional de Tecnica Aerospacial "Esteban Terradas") , Paseo del Pintor Rosales,

6 REPORT 1971

34, Madrid - 8 (Apartado de Correos, 8346) President: Sr. Rafael Calvo Representatives: Sr. Rafael Calvo, Sr. A. Perez-Marin

Sweden (1950) Swedish National Committee for Mechanics, Chalmers University of Techno· logy, S-40220 Gothenburg 5 President: Prof. Jan Hult Secretary: Prof. N. Frossling Representatives: Prof. S. Berndt, Prof. Jan Hult

Switzerland 1(1950) Eidgenossische Technische Hochschulen Zurich und Lausanne President: Dr. Jakob Burckhardt Secretary: Dr. Peter Schindler Representatives: Prof. Niklaus Rott, Prof. Hans Ziegler

UK (1948) The Royal Society, 6 Carlton House Terrace, London SW 1 President: Lord Blackett, C. H. Executive Secretary: Sir David Martin Representatives: Prof. G. K. Batchelor, Prof. R. E. D. Bishop, Sir M. J. Light-hill, Prof. L. Maunder, Prof. P. R. Owen

USA (1949) The U.S. National Committee on Theoretical and Applied Mechanics, Divi-sion of Physical Sciences, National Research Council, 2101 Constitution Avenue, Washington D. C. 20418 Chairman: Prof. E. H. Lee Vice-Chairman: Prof. G. Carrier Secretary: Dr. F. N. Frenkiel Representatives: Prof. C. Drucker, Dr. F. N. Frenkiel, Prof. N. J. Hoff, Prof. E. H. Lee, Prof. W. Prager

USSR (1956) USSR National Committee on Theoretical and Applied Mechanics, Leningrad-skii prospekt 7, Moscow A-40 President: Prof. N. I. Muskhelishvili Vice-President: Prof. L. I. Sedov Secretary: Prof. G. K. Mikhailov Representatives: Prof. N. I. Muskhelishvili, Prof. L. __ I. Sedov, Prof. A. A. Ilyushin, Prof. A. A. Nikolskii, Prof. V. V. Sokolovsku

Yugoslavia (1952) Yugoslav Society of Mechanics, 73, Bulevar Revolucije, P. 0. 895, Belgrade Representative: Prof. Ing. Anton Kuhelj


CISM (1970) Affiliated organizations

International Centre for Mechanical Sciences, Palazzo del Torso, Piazza Gari-baldi, Udine, Italy President: Avv. Vinicio Turello Secretary-General : Prof. Luigi Sobrero Rector: Prof. W. Olszak Representative: Prof. Luigi Sobrero Representative of IUTAM in CISM: Prof. H . Gortler

Members of the * Prof. J. Ackeret (Switzerland)

Prof. E. R. de Arantes e Oliveira (Portugal)

Prof. G. K. Batchelor (UK) Prof. E. Becker (Germany) Prof. S. Berndt (Sweden) Prof. P. L. Bhatnagar (India) Prof. R. E. D. Bishop (UK) Dr. J. H. Blackwell (Canada) Prof. G. Brankow (Bulgaria) Prof. F. Buckens (Belgium)

* Prof. J. M. Burgers (USA) Sr. R. Calvo (Spain) Prof. E. Carafolie (Rumain) Prof. B. Dolapchiev (Bulgaria) Prof. D. C. Drucker (USA) Prof. F. Engelund (Denmark) Prof. C. Ferrari (Italy) Prof. W. Fiszdon (Poland) Prof. B. Fraeijs de Veubeke

(Belgium) Dr. F. N. Frenkiel (USA) Prof. L. Gauthier (France) Dr. P. Germain (France) Prof. P. G. Glockner (Canada)

* Prof. S. Goldstein '(USA) Dr. M. Gradowczyk (Argentina) Prof. H . Gortler (Germany) Prof. J. 0. Hinze (Netherlands)

General Assembly Prof. N.J. Hoff (USA) Prof. J. Hult (Sweden) Prof. A. A. Ilyushin (USSR) Prof. I. Imai (Japan) Prof. P. Janssens (Belgium) Prof. J. Jerie (Czechoslovakia) Dr. J . F. Keffer (Canada)

0 Prof. W. T. Koiter (Netherlands) Prof. J. Kozesnik (Czechoslovakia)

* Prof. Y. H. Ku (USA) Prof. A. Kuhelj (Yugoslavia) Prof. E. H. Lee (USA) Dr. R. Legendre (France) Sir M. J. Lighthill (UK) Prof. L. Maunder (UK) Prof. E. Mettler '(Germany) Prof. N. I. Muskhelishvili (USSR) Prof. A. A. Nikolskii (USSR) Prof. F. I. Niordson (Denmark) Prof. W. Nowacki (Poland)

* Prof. F. K. G. Odqvist (Sweden) Prof. W. Olszak (Italy) Prof. P. R. Owen (UK) Prof. E. Palm (Norway) Prof. H . Parkus (Austria) Prof. C. de Pater (Netherlands) Prof. E. Peste! (Germany) Sr. A. Perez-Marin (Spain) Prof. W. Prager (USA)

* Members elected by the General Assembly for the period 1968-1972. 0 Representing the Congress Committee.

8 REPORT 1971

Prof. J. R. M. Radok (Australia) Prof. M.A. Ranta (Finland) Prof. M. Reiner (Israel) Dr. F. P. J. Rimrott (Canada) Prof. N. Rott (Switzerland) Prof. M. Roy (France)

* Prof. W. Rubinowicz (Poland) Prof. I. Salyi (Hungaria) Prof. L. I. Sedov (USSR)

§ Prof. L. Sobrero (Italy) Prof. V. V. Sokolovskii (USSR) Prof. G. Supino (Italy) Prof. I. Tani (Japan)

* Sir G. Taylor (UK) Prof. G. Temple (UK)

* Prof. W. Weibull (Sweden) Prof. M. Yoshiki (Japan) Prof. H. Ziegler (Switzerland)

Members of the Congress Committee

Prof. J. Ackeret (Switzerland) **Prof. G. K. Batchelor (UK) ':'*Prof. E. Becker, Secretary (Germany)

Prof. B. A. Boley (USA) Prof. J. M. Burgers (USA) Prof. A. Caquot (France) Prof. S. Goldstein (USA) Prof. H. Gortler (Germany)

**Prof. N.J. Hoff (USA) **Prof. W. T. Koiter (Netherlands)

Prof. N. I. Muskhelishvili (USSR)

,§ Representing CISM. ** Members of Executive Committee.

Prof. F. K. G. Odqvist (Sweden) Prof. H. Parkus (Austria) Prof. M. Roy (France) Prof. W . Rubinowicz (Poland) Prof. L. I. Sedov (USSR) Prof. H. Solberg (Norway) Prof. I. Tani (Japan) Sir Geoffrey Taylor (UK) Prof. G. Temple (UK) Prof. S. P. Timoshenko (USA) Prof. W. Weibull (Sweden)

INTERNATIONAL UNION OF THEORETICAL AND APPLIED MECHANICS

Reports of Symposia held in 1971 1.

9

JOINT IUTAMJIUGG SYMPOSIUM ON FLOW OF MULTIPHASE FLUIDS IN POROUS MEDIA, Calgary (Canada), May 12 to May 14, 1971.

Chairman: Prof. W. D. Baines, University of Toronto, Canada. 41 participants from 14 countries (Australia, Canada, France, Germany,

Greece, Hungary, Israel, Japan, Netherlands, Rumania, Switzerland, UK, USA, USSR). Report:

Hosts for the Symposia were the University of Calgary and the Petroleum Recovery Research Institute. The Scientific Committee consisted of the follow-ing members:

Prof. W . D. Baines, Canada (Chairman) Prof. G. Dagan, Israel Prof. V. Nikolaevskii, USSR Prof. Schoeller, France Prof. L. J. Tisot, Belgium Prof. D. K. Todd, USA There were 41 participants from 14 countries. Financial support was

provided from the National Research Council of Canada, the Petroleum Re-covery Research Institute, the University of Calgary, and the University of Toronto.

The topics discussed at the Symposium included both the theoretical analysis of flow and the physical realizations in the laboratory and in the field.

Altogether 27 papers were presented. Extended summaries of the papers were available to the participants at the Symposium.

Scientific Pro gramme Wednesday a.m. Fundamental Considerations

G. I. Taylor (UK): "Some properties of a porous model". *C. Braester ( Israel): "Immiscible displacement in fissured porous media". Y. Bachmat (Israel): "Spatial macroscopization of processes in multiphase

system". *V. Ionescu & C. Cozma (Hungary): "Theoretical solutions in the immiscible,

plane, noncapillary displacement in homogeneous or nonhomogeneous porous media" .

Wednesday p.m. Fundamental Studies

D. Nicholson & J. H. Petropoulos (UK): "Study of some geometrical factors affecting one- and two-phase flow of dilute gases through porous solids".

':' Not presented. Authors did not attend Symposium.

10 REPORT 1971

F. J. Barclay, T. J . Ledwidge & G. C. Cornfield (UK): "Wave propagation and critical flow in two-phase, one-component mixtures" .

*F. J. Legerer (Canada): "On the influence of electrostrictive forces on a two-phase flow".

*H. I. Ene (Hungary) : "On the flow of multi phase fluids in porous media in the presence of a magnetic field".

R. Raghavan (USA): "The instability of an interface between liquids that are in parallel flow in a porous medium" .

*A. P. Verma (India): "Fingeroimbibition in displacement processes through porous media".

T htJrsday a.m. Dispersion and Salt Water Intrusion

R. A. Wooding (USA): "Instability at a diffusing interface between two fluids in a porous medium".

N. Van Quy (France): "Theoretical study of the flow of two fluids separated by an interface in a capillary space".

S. Shima (Japan): "Transient characteristics of salt-water wedges" . D. K. Todd & C. F. Meyer (USA) : "Salt water intrusion into OAHU aquifers". A. Verruijt (Netherlands): "Some aspects of dispersion at an interface".

Thursday p. m. Unsatrtrated Soils

J. R. Philip (Australia): "Mechanics of equilibrium and flow of fluids in saturated and unsaturated swelling media" .

D. E. Smiles, G. Vachaud & M. Vauclin (France): "A test of the uniqueness of the soil moisture characteristic during transient, non-hysteretic, horizon-tal, unsaturated flow of water in a rigid soil".

K. K. Watson (USA) : "Experimental and numerical studies of intermittent flows in unsaturated porous materials".

G. F. Kennedy & J. Lielmezs (Canada) : "Heat and mass transfer in freezing partially frozen soil"'. . .. . ..

*C. Thirriot, S. Bories, J . M. Aribert & J. C. R1val (France): Instabilities thermiques et digitations en ecoulement multiphasique en milieu poreux".

Friday a.m. Petrolertm Recovery

V. N. Nikolaevskii & B. E. Somov (USSR) : "Heterogeneous flows of multi-component mixtures in porous media".

J. Hagoort (Netherlands) : "The stability of water-oil displacement in connate-water-bearing porous media".

H. Pascal (Hungary): "Pressure build-up behaviour in a well condensate-gas system".

H 0 Schl. gg & T. Dracos (Switzerland): "Migration of oil in unconfined . . e acquifers".


Friday p.m. Petroleum Recovery

*M. V. Filinov & V.I. Maron (USSR): "One-dimensional models of double-phase filtration accounting elastic compressibility of media".

B. H. Nahid & L. L. Handy (USA): "Gas flow through porous media contain-ing liquids with surfactants".

R. Raghavan (USA) : "Theoretical considerations regarding emulsification in porous media".

H. Pascal & P. M. Dranchuk (Hungary): "Non-steady flow of water-oil mix-ture in porous media".

P. M. Dranchuk & A. Jain (Canada): "Some modifications to the Higgins-Leighton method".

Papers accepted without review during Symposium and presented in replace-ment were: D . Racz (Hungary): "Barriers formed around hydrocarbon reservoirs and their

consideration in fluid filtration". S. Natanson (UK) : "Recovery control - A real life exercise in cybernetics". H. Kasemi (USA): "Pressure transient testing in wells". H. J. Morel-Seytoux (USA): "Some comments on flows through saturated

soils" .

2. IUTAM SYMPOSIUM ON UNSTEADY BOUNDARY LAYERS, La-

val University, Quebec (Canada), May 24 to May 28, 1971.

Chairman: Prof. E. A. Eichelbrenner, Laval University, Canada. 84 participants from 13 countries (Algeria, Australia, Canada, Colombia,

France, Germany, India, Japan, Rumania, UK, USA, USSR, Yugoslavia) . Report:

As may be seen from the scientific programme, about 60 contributions were made, covering a good part of the domain of unsteady boundary layers. Due to the fact that during the early 60's the domain has been somewhat neglected in the international field, and in view of a new gain of actuality in last years, the Symposium started with an excellent "resume" given by Prof. J. T. Stuart, from Imperial College of London, which gave a good key-note to the further discus-sions. The subsequent original contributions and the discussions helped very much to give clear orientation for the main points treated in the program, in particular with respect to phenomena involving singularities and discontinuities as for instance questions of separation and reattachment as well as the macro-scopic effects of thermal or dynamical instabilities.

The participants seemed satisfied about the results and informations obtained during the Symposium and the distribution of the complete set of preprints to all participants helped very much in view of a lasting impression of the subjects treated.

12 REPORT 1971

The proceedings will be published by the "Presse de l 'Universite Laval" and should be available in 1972.

Scientific Programme

Monday 24 May 1971- Lundi 24 mai 1971: J. T. Stuart (UK): "Review Lecture".

(Chctirman: W. R. Sears, USA) M. V. Morkovin, R.I. Loehrke & A. A. Fejer (USA): "Development of insta-

bilities in laminar boundary layers in response to periodic changes in free-stream-speed" .

B. E. L. Deckker & P. Sampath (Canada): "Instability of free shear layers adjacent to a vibrating flame surface". . .

V. Saljnikov (Algerie): " L'Universalisation des Equations de Ia couche llffilte laminaire instationnaire".

S. H. Davis (USA) : "Energy stability of unsteady flows".

(Chairman: J. W eske, USA ) N. Riley (UK): "Circular oscillations of a circular cylinder". . H. J. \'Virz (Germany): "Similarity solutions of unsteady, compresstble plane

and axisymmetrical laminar boundary equations". R. C. Ackerberg & J. H . Phillips (USA): "The unsteady laminar boundary layer

on a semi-infinite flat plate due to small fluctuations in the free stream velocity".

0. A. Oleinic (USSR): "On mathematical problems of unsteady boundary layer theory".

( Chairman: A . W aiz, Germany) S. J. Koob & D. E. Abbott (USA): "An extended boundary-layer analysis of

the impulsive motion of a flat plate in a viscous fluid". I. Pop (Rumania) : "On unsteady three-dimensional laminar flow". V. W. Nee & F. C. W. Fung (USA): "The vanishing plate flow". S.C. R. Dennis (Canada): "Unsteady heat transfer for boundary-layer flow

over a flat plate".

Tuesday 25 May 1971-Mardi 25 mai 1971:

(Chairman: L. S. G. K ovasznay, USA) W. R. Sears & D . P. Telionis (USA): "Unsteady boundary-layer separation" . J. L. Peube (France): "Developpement du sillage dans les ecoulements alter-

natifs". J. Buckmaster (USA): "The unsteady evolution of the singularity at separa-

tion".


L. E. Ericsson '(USA): "Unsteady aerodynamics of separating and reattaching flows on blunt bodies of revolution".

( Chairman: K.J. Orlik-Riickemann, Canada) B. Gebhart (USA) : "Starting flows, effects of unsteady surface conditions on

laminar stability, and unsteady flow separation in buoyancy induced flows". J. H. Whitelaw & L. Matthews (UK): "Hot-wire measurements downstream

of the blunt trailing edge of a plane". E. A. Eichelbrenner (Canada): "Decollement instationnaire en regime laminaire

a trois dimensions". R. Askovic (Yugoslavia): "Equations universelles de la couche limite laminaire

tridimensionnelle en regime instationnaire et leur traitement".

W ednesday 26 May 1971 - Mercredi 26 mai 1971: (Chairman: I. Tm1i, Japan) K. J. Orlik-Ri.ickemann (Canada) : "On dynamic viscous pressure interaction". R. Land! (Germany): "Lift forces on an oscillating cylinder at low reynolds

numbers" . M.S. Uberoi (USA): "Unsteady wakes of bluff and streamlined bodies with

screens behind them" . Z. A. Walenta & E. M. Leskiewicz (Poland): "The structure of the shock wave

in the vicinity of the shock tube sidewall". A. Bourgine (France): "Etude des fluctuations de pression parietales, en ecoule-

ment transsonique, sur ensemble cone-cylindre presentant un retreint". (Chairman: .i\1. V. Morkovin, USA)

L. S. G. Kovasznay & H. Fujita 1(USA): "Unsteady boundary layer and wake near the trailing edge of a flat plate".

D. Bechert & E. Pfizenmaier (Germany): "On the Kutta condition at the trailing edge of a nozzle in a weakly nonstationary jet flow".

P. J. Murphy (USA): "The wake of a vibrating ribbon" . (Chairman: K. Stewartson, UK) I. Tani (Japan): "Unsteady boundary layer over a flat plate started from rest". L. F. Kozlov & A. I. Ziganyuk (USSR): "Unstationary laminar boundary layer

in the incompressible liquid and compressible gas with suction or injection". W. 0. Criminale (USA): "On structure of the laminar boundary layer in the

presence of a fluctuating free-stream". K. Lal ( India) : "Development of unsteady boundary layers under variable suc-

tion". (Chairman: M.S. Uberoi, USA )

T. Akamatsu (Japan): "On some aspects of unsteady boundary layers induced by shock waves".

14 REPORT 1971

R. Kh. Zeytounian & J. Piquet (France): "Recherches recentes dans le domaine des couches limites instationnaires".

T. Cebeci & H. B. Keller (USA): "On the computation of unsteady turbulent boundary layers".

V. C. Patel & L. Carr (USA): "Some solutions of the unsteady two-dimensional turbulent boundary layer equations".

Thunday 27 May 1971 - Jettdi 27 mai 1971 :

(Chairman: V. Saljnikov, Algeria) S. Taneda 1(Japan) : "Visualization experiments on unsteady vrscous flows

around cylinders and plates". P. Florent & N. N. Dinh (Canada): "Ecoulement instationnaire entre un disque

fixe poreu..x et un disque tournant" . J. R. W eske (USA) : "Reversal of the shallow water drain hole vortex related

to secondary vorticity in the boundary layer" . P. M. Sforza & R. N . Valentine (USA): "Unsteady flow within a circular

cavity". (Chairman: S. Taneda, Japan) H. P. Greenspan & M. Israeli (USA): "Unsteady nonlinear motions of a con-

fined rotating fluid". H . J. Lugt & H. J. Haussling (USA): "Transient Ekman and Stewartson layers

in a rotating tank with a spinning cover". L. Debnath (USA): "On unsteady magnetohydrodynamic boundary layers in a

rotating flow". H . Werle (France): "Visualisation hydrodynamique d'ecoulements instation-

naires".

Friday 28 May 1971- V endredi 28 mai 1971:

(Chairman: N. Riley, UK) K. Stewartson (UK): "Unsteady vortex boundary layers" . L. G. Redekopp (USA): "The motion of a viscous, stratified fluid subjected

to forced oscillations". M. Gaster (UK): "Vortex shedding from slender cones". B. D. Dore (UK): "A study of mass transport in boundary layers at oscillating

free surfaces and interfaces" . ( Chairman: S.C. R. Dmnis, Ca11ada) G. de Vahl Davis & P. D. Richardson (USA): "Interaction between a sound

field and natural convection on a horizontal cylinder". C.-Y. Wang (USA) : "Acoustic streaming of a cylinder near an unsteady

source".


K. R. Purdy & N. P. Patel (USA): "On acoustic streaming in a channel". K. E. Barrett (UK): "Acoustic streaming arising from a uniform electric

current". (Chairman: J.P. St11art, UK)

W. A. Woods (UK): "Some industrial problems associated with unsteady boundary layers".

P. H. Oosthuizen (Canada): "A numerical study of unsteady laminar combined convective flow over vertical plates".

T. J. Pedley (UK): "Heat transfer from a hot-film in non-reversing oscillatory flow, with application to measurement of blood flow" .

V. M. Soundalgekar (India): "Free convection effects on oscillatory flow past an infinite porous plate with variable suction".

(Chairmall: R. Wille, Germany)

A. S. C. Ma & K. S. Ong (UK): "Impulsive-injection of air into stagnant sur-roundings".

J. Gosse, M. Martin & M. Lebouche (France): "Etude de la phase du transfert parietal de chaleur ou de masse en ecoulement pulse incompressible".

3. IUT AM SYMPOSIUM ON NON-STEADY FLOW OF WATER AT

HIGH SPEEDS, Leningrad (USSR), June 22 to June 26, 1971. Chairman: Prof. L. I. Sedov, University of Moscow, USSR. 203 participants from 17 countries (ARE, Bulgaria, Canada, Czeckoslova-

kia, France, Germany, Hungary, Israel, Italy, Netherlands, Norway, Poland, Sweden, Switzerland, UK, USA, USSR). Report:

The IUTAM Symposium on Non-Steady Flow of Water at High Speeds was held in the city of Leningrad on June 22-26, 1971.

203 scientists from 17 countries participated in the work of the Symposium. The work of the Symposium was organized by the Scientific Committee which consisted of:

L. I. Sedov (USSR, Chairman) T. Brook Benjamin (UK) E. Naudascher (Germany) M. Plesset (USA) R. Siestrunk (France) M. Tulin (USA) L. Wijngaarden (Netherlands)

and the USSR organizing committee L. I. Sedov (Moscow) B. S. Kogarko (Moscow)

16 REPORT 1971

M.A. Lavrent'ev (Novosibirsk) G. V. Logvinovich (Kiev) A. B. Lotov (Moscow) G. K. Mikhailov '(Moscow) A. D. Pernik (Leningrad) I. A. Titov (Leningrad) V. F. Shushpanov (Moscow) Yu. L. Yakimov (Moscow) G. G. Chakhmakhchev (Moscow) The major problem considered at the Symposium was hydrodynamics of

cavity flows which develop in the process of high-speed motion of bodies in fluids as well as in the process of impact of flows and droplets upon solid bodies. Theoretical and experimental methods of investigation of such flows, physical aspects of cavitation, mathematical methods of investigation of cavity flows, interconnection of cavitation with acoustic phenomena and some other questions were thoroughly considered.

At the Symposium 41 papers were delivered. Academician L. I. Sedov in his opening address spoke of the general state

and prospects of development of hydrodynamic high-speed non-steady flows. Besides that 5 general reports were delivered, which were dedicated to the following major problems:

V. E. Johnson (USA) Investigation of cavity flows by experimental means. G. Birkhoff (USA) Mathematical analysis of cavitation in water. J. E. Field (UK) High velocity liquid impact and cavitation studies. H. Flynn (USA) Dynamics of cavitation bubbles set into large amplitude

motion by acoustic pressure fields. G. V. Logvinovich, Yu. L. Yakimov (USSR) High speed entry of bodies

into a liquid. The following general problems were considered at the Symposium:

1. The problem of separation flows. 2. Application of methods of mathematical analysis and computer technique to

the investigation of jet flows. 3. The mechanism of impact of jets upon a solid body and the mechanism of

cavitation erosion. 4. The problem of entry of bodies into water. 5. The problem of motion of liquid-gas bubbles mixture. 6. The conduct of individual bubbles in a variable pressure fild.

Abstracts of all the reports were published together with the program of the Symposium.

A brief review of the Symposium is being published in the journal "Izvestia Academii Nauk of the USSR", "Mechanics of liquids and gases" series.


The presented complete texts of the reports are being prepared for publica-tion by "Nauka" publishing house.

Besides IUT AM the following bodies took part in the organization of the Symposium:

Presidium of the Academy of Sciences of the USSR, The USSR National Committee on Theoretical and Applied Mechanics, Leningrad City Council, Leningrad House of Scientists. The sessions of the Symposium took place at the Leningrad House of Scien-

tists, the auditorium was equiped for simultaneous translation in English and in Russian.

TlleJday, June 22 Morning Session

Scientific Pl'o gl'amme

L. I. Sedov (USSR): Opening address.

L. Sedov

V. E. Johnson (USA): "Investigation of cavity flows by experimental means". (General report).

V. A. Barabanov, A. A. Butuzov, A. N. Ivanov, I. A. Titov (USSR): "Deve-loped cavity flows past profiles in case of gliding and in an infinite flow".

A. J. Acosta, R. K. De Long (USA): "Experimental investigation of non-steady forces on hydrofoils oscillating in heave".

G. S. Migirenko, G. S. Kozyuk, L. I. Mal'tsev, V. I. Mikuta, B. G. Novikov (USSR): "Some ways of cavity flow control at low Froude numbers".

Afternoon Session L. A. Ephstein (USSR): "Characteristics of ventilated cavities and some scale

effects". J.D. van Manen (Netherlands): "The effect of cavitation on the interaction

between propeller and ship's hull". J . M. Michel (France): "Plane flows with ventilated pulsating cavities, experi-

mental investigation and theoretical analysis". I. I. Efremov, V. M. Roman (USSR): "Influence of a free surface and walls

on characteristics of a cavity flow".

WedneJday, June 23 Morning Session G. Birkhoff (USA): "Mathematical analysis of cavitation in water". (General

report) . T. Y. Wu, A. K. Whitney, C. Brennen (USA): "Wall effects in cavity flows

and their correction rules".

18 REPORT 1971

A. V. Kuznetsov, 0. M. Kiselev, L. M. Kotlyar, A. G. Terent'ev (USSR): "Theoretical study of non-linear problems of liquid flow with free boundaries".

P. Leehey (USA): "Supercavitating hydrofoil of finite span". P.R. Garabedian (USA): "Calculation. of Riabouchinsky cavity flows". Afternoon Session V. N. Buivol, E. N. Kapankin, Yu. F. Zhuravlev (USSR): "Disturbed motion

of thin three-dimensional cavities". L. F. Tsen, M. Guilbaud (France): "The calculation and investigation of super-

cavitating foils oscillating in a flow". B. Yim (USA): "Investigation of gravity and ventilation effects in water entry

of thin foils". 0. P. Shorygin '(USSR): "Oblique water entry of axisymmetrical bodies of a

simple shape".

Thttrsday, June 24 Morning Session J. E. Field (UK): "High velocity liquid impact and cavitation studies". (Gene-

ral report). M. Holt (USA): "Application of similarity methods to collapsing cavity

problems". F. G. Hammitt, Ch. L. Kling, T. M. Mitchell, E. E. Timm (USA): "Asymmet-

ric cavitation bubble collapse near solid objects". H. Rieger (Germany): "Material destruction by drop impact and cavitation". Afternoon Session G. V. Logvinovich, Yu. L. Yakimov (USSR): "High velocity entry of bodies

into a Liquid". (General report). J. H. Brunton (UK): "The deformation of solid by cavitation and drop imp-

ingement''. J. J. Varga, Gy. Sebestyen (Hungary), K. K. Shal'nev, M. K. Bologa, Yu. N.

Paukov (USSR): "Correlation between hydromechanical and acoustical parameters of cavitation".

A. A. Fyall (UK) : "Rain erosion - single impact studies". A. Thiruvenga<lam (USA): "Further studies on modeling cavitation erosion". E. Adams, W. Korner '(Germany): "On the aerodynamic decay of droplets and

the impact problem".

Friday, June 25 Morning Session J. H. Witte (Netherlands): "Mixing shocks in high-speed two-phase flow". B.S. Kogarko, R. M. Garipov (USSR): "Motion of liquid-gasbubble mixtures" . L. Noordzij (Netherlands): "Shock waves in liquid-gasbubble mixtures".

INTERNATIONAL UNION OF THEORETICAL AND APPLIED MECHA.t"\JICS 19

W. Kalita, A. Szaniawski (Poland): "Experimental investigations of flows with drops and jets of non-mixing liquids".

L. M. Lyamshev, K. A. Naugol'nykh (USSR): "Acoustical aspects of hydro-dynamic cavitation".

N. N. Kovalev, Yu. U. £del (USSR): "Experimental investigations of cavity flows and cavitation erosion in cascades of water-turbine type".

Saturday, .fune 26 Morning Session H. Flynn '(USA): "Dynamics of cavitation bubbles set into large amplitude

motion by acoustic pressure fields". (General report). A. S. Gorshkov, Yu. L. Levkovsky (USSR): "Basic processes and scale effects

of the inception of cavitation" . A. Keller (Germany): "The influence of the cavitation nuclei spectrum on

cavitation inception (investigated with a scattered light counting method)". J. H. J. van der Meulen (Netherlands): "Cavitation on hemispherical nosed

teflon bodies". L. H. Bernd (USA): "Gas nuclei, surface, and turbulent dissolving as related

to cavitation inception". Afternoon Session

P. Gast (Germany): "Experimental investigations of the inception of cavitation on streamlined bodies".

F. Danel '(France): " Influence of free and dissolved gas on the phenomenon of cavitation".

W. Lauterborn (Germany): "Resonance curves of bubbles and their generation by giant laser pulses". In his speech at the final session of the Symposium L. I. Sedov spoke of the

novelty and significance of the results of works reported and discussed at the Symposium. He also expressed his gratitude to the reporters, all the participants and all persons who help to organize and to hold the Symposium.

4. IUTAM SYMPOSIUM ON DYNAMICS OF IONIZED GASES, Tokio

(Japan), September 13 to September 17, 1971. Chairman: Prof. M. J. Lighthill, University of Cambridge, UK. 56 participants from 8 countries (Canada, France, Germany, Japan, Poland,

Rumania, UK, USA). Report:

The Symposium was held September 13 through 17, 1971 at the Conven-tion Hall, Science Council of Japan, Tokyo, Japan. The Symposium was

20 REPORT 1971

sponsored by the Internal Union of Theoretical and Applied Mechanics with the assistance of the Science Council of Japan.

Members of the International Scientific Committee are: M. J. Lighthill, University of Cambridge, UK (Chairman) L. J. F. Broer, Technische Hogeschool te Eindhoven, Holland G. G. Chernyi, University of Moscow, USSR W. Fiszdon, University of Warsaw, Poland F. N . Frenkiel, Naval Ship Research and Development Center, USA P. Germain, University of Paris, France H. Sato, University of Tokyo, Japan (Secretary) I. Tani, University of Tokyo, Japan I. Imai, University of Tokyo, Japan

Members of the Local Organizing Committee formed in the Science Council of Japan are:

I. Imai (Chairman), M. Iwasaki, K. Oshima, G. Kamimoto, T. Kambe, K. Kuriki , S. Kuwahara, H. Sato, K. T akayama, K. Niu, H. Hasimoto, K. Hatta, K. Fusimi, T. Maekawa, T. Murasaki, Y. Mori.

Subjectmatters of the Symposium are concerned with the flow of ionized gas. Emphasis was placed on the motion of the ionized gas rather than on the physical nature of the ionized gas at rest.

Participation in the Symposium was on invitation basis. The total number of participants was 56 from 8 countries, including 2 from Canada, 10 from France, 4 from Germany, 1 from Poland, 1 from Rumania, 4 from United Kingdom, 11 from United States and 23 from Japan. About 40 Japanese auditors were also present. The number of papers presented was 38 including 4 Review Papers. Ten papers originally in the program were cancelled because of the absence of authors. The Saturday (September 18) session was cancelled by the rearrangement of the program. All papers were presented in English.

Participants were invited to the banquet by the President of the Science Council of Japan, Dr. F. Egami on September 16, Thursday. A tour to an old city, Kamakura was arranged in the afternoon of September 15.

The fund from IUTAM was distributed to 10 participants for their travel expenses. The fund raised by the Local Organizing Committee was distributed to 7 participants as subsistence in Tokyo. The local fund was used also for various arrangements.

The Proceedings of the Symposium will be published by the University of Tokyo Press under the co-editorship of Professors M. J. Lighthill, !sao Imai and Hiroshi Sato not later than the summer, 1972.

Hiroshi Sato


Scientific Programme

Monday, September 13:

K. Niu: "Collision-free shock wave". (General lecture). P. M. Chung & T. Marcisz: "Turbulent shear flow of continuum plasma" . L. Stenflo, H. Wilhelmsson & K. Ostberg: "Non-linear instabilities in streaming

plasmas". J. M. Dawson, W. L. Kruer & B. Rosen: "Investigations of ion waves". T. Kakutani: "Weak nonlinear magneto-acoustic waves in an inhomogeneous

plasmas". V.I. Karpman: "Electroacoustic waves in plasma". C. Yamanaka, S. Nakai, J. Mizui, M. Matoba & K. Ueda: "Turbulent process

in shock waves". S. Morioka & J. R. Spreiter: "Effect of dissipation due to firehose instability

on half-jet flow of a collisionless plasma". M. Lessen & H. M. Zien: "Resistive instability of a shearing, free boundary

layer with imbedded shearing magnetic fields". N . K. Martinov: "Instabilities of a non-equilibrium weakly ionized plasma non-

linearly interacting with strong electric and magnetic fields".

Tuesday, September 14:

R. A. Gross: "Recent developments in ionizing shock wave research". (General lecture).

S. I. Anisimov & V. I. Fisher: "Non-equilibrium ionization and light absorp· tion behind a radiation supported shock wave".

P. L. Auer, W. W. Destler & D. L. Morse: "Energy relaxation in collision-free shocks".

C. K. Chu: "Computational study of shock waves". R. Taussig: "Shock wave production of relativistic plasmas" . Z. Mucha: "Interaction of a strong shock wave with electromagnetic field". L. C. Woods : "Structure of collisionless shocks in a magnetoplasma and the

ion-acoustic instability". A. Crespo: "Reflection of ionizing shocks". K. Adati, N. Asano, J. Fujita, S. Hamada, K. Muraoka, S. Shimamura & T. Ta-

niuti: "Experiments of shock waves in a fully ionized plasma flow". J. Irving, W. M. Deuchars & I. Thomson: " Imploding stage of the linear theta-

pinch". V. R. Deutsch & Gh. Maftei: "Structure of weak shock waves within the two

fluid model".

W ednesday, September 15:

Th. Peters: "Flow with solid boundaries". (General lecture). S. H. Lam: "Magnetic sheath adjacent to absorbing surface".

22 REPORT 1971

P. Valentin, M. Terrier, P. Vervisch & G. Piar: "Laminar boundary layers in low pressure argon plasma".

K. J. Touryan & D. W. Boyer: "Continuum thick sheath studies in hypersonic ionized boundary layers".

Thtmday, September 16:

L. Talbot: "Electrostatic probe response in flowing low-density plasmas". (Ge-neral lecture).

C. Phipps & D. Bershader: "Measurement of non-isotropic electron velocity distributions by laser scattering".

H. J. Pain & J. S. Dolby: "An ultra high frequency laser interferometer for ionized shock front diagnostics".

H. Guthert & K. A. Graf: "Electromagnetic interactions with turbulent plasmas''.

A. Lasek: "Experimental studies of the supersonic flow of a ionized gas". J. Taillet, A. Brunet & G. Fournier : "Behaviour of a positive probe in high-

speed collission-free plasma flow" . T. Yoshikawa & T. Murasaki: "Experimental investigations on arc-heated steady

plasma flow". M. Baribaud, J. M. Dolique & F. Zadworny: "Penetration and crossing of a

barrier of transverse magnetic field by a purely ionic plasma". J. G. Siambis, B. W. Johnson & W. R. Kramer: "Streaming plasma interactions

with variable longitudinal magnetic fields". K. Kuriki, M. Inutake & J. Suzuki: "Plasma wind tunnel for magnetohydro-

dynamics" .

Friday, September 17:

\Y./. H. Bostick, V. Nardi & W. Prior: "Formation and decay of vortex filaments in a plasma current sheath" .

K. V. Brushlinsky & A. I. Morosov: "Numerical investigation of two-dimen-sional plasma flows in channels".

M. Iwasaki & K. Shibata: "Theoretical and experimental research of the electro-magnetic acceleration of the shock induced flow in argon".

K. Robert: "Linearized MPD jet and channel flows in external magnetic fields with hall-effect".

B. Forestier, B. Fontaine & J. Valensi: " Interaction of an ionized argon flow with crossed electric and magnetic fields" .

J. Goldfinch & D. C. Pack: "Expansion of a plasma from a spherical source into a vacuum".

I. I. Glass & 0. Igra: "Corner-expansion flow of ionized argon". K. Kusukawa & T. Takahashi: "On the flow of a non-equilibrium ionized

gas past a wall in the presence of a magnetic field".


E. G. Broadbent: "Some electrogasdynamic flow with curved streamlines". H . Kubo, N. Kawashima & T. ltoh: "Interaction of plasma streams with a

neutral gas cloud". R. G. John, W. von Jaskowsky & K. E. Clerk: "Quasi-steady plasma accelera-

tion".

Satrtrday, September 18:

P. L. Bhatnagar & W . P. Kanwal: "Mixed boundary value problems in the flow of ionized gases".

W. Lochte-Holtgreven: "Velocity change of reflected shock waves by dissocia-tion relaxation of molecules".

V. Alexandrov: Closing address.

Other Meetings The Bureau met in Copenhagen at the Technical University of Denmark,

on 5 October, 1971. A summary record of this meeting has been distributed to members of the General Assembly.

TREASURER'S REPORT Summarised Statement of Receipts and Paym ents for the year ended 31st December 1971

(A) UNRESTRICTED FUNDS Balances 1st ja1111ary 1971

Receipts: Subscriptions (Schedule I) .............................. ..... .... . .............. .. . ..... . Bank Interests ......... .. . ....... . .... . . . ...... .. . . ..... ... ....... ... ........... .. .. . . .. ...... . Reimbursement ICSU dues for 1970 ....... .. ............................... . ......... . Transfer from Congress Committee .. .. . ......... ........ .. ... .......... .... . .. ..... . . Transfer from Deutsche Bank .. .. ... .. ..................................... .. .. ......... .

Totals ........ .

Payments: Printing costs IUTAM Report 1970 .... ........ . .................. .. . ............ . .. ... .. Auditor's fee for financial report 1970 ............................. ................ .. . Travelling and subsistence expenses Bureau Meeting Copenhagen .... . ........ .. .. Prof. N iordson, Trav.exp. IFOMM 1971 ......................... .. .. ...... .... .... .. Prof. Lighthill, Trav.exp. Budapest . .......... .. ......... . .................. ........... . . Springer Verlag Wien, 8 Proceedings for members IUTAM Bureau ........... . Subscription 1971 to ICSU ................... . ........ . .............. . ........ ......... . . Bank charges . .......... . ...... .. .. ............ . ... .. ......... ..... ...... . ... . .... .... .. . .. .. . Transfer to Special Account Mees on Hope ........... . ......................... .. .. . Travelling and subsistence expenses Symposium Calgary (Schedule II) ........ . Total payments ........... .. ............ .. .. .. .. . .. .. ......... . .... .. .................... ... .

Balances 31st December 1971 ....... . ........ . ........ ..... .... ... ......... . ..... .... ... .

U. S. Dollars

3.443.35

3.443.35

648.30

201.20

- .48

849.98

2.593.37

Dutch Guilders

144.615.97

10.013.34 8.283.42

639.56 45.841.50*)

209.393.79

2.276.70

611.88 760.65

5.-

362.81 4.017.04

205.376.75

Summarised Statement of Receipt! and Payments for the year ended 31st December 1971

(B) RESTRICTED FUNDS Balances, lsi January 1971 .. ........ .. .... .. ............. ..

Receipts: Grants from UNESCO Subvention .. .............. ....... .. ... .. .. .... US-$ 7.000.-Grants from ICSU ...... ......... .. ......... ................ . ....... .. .. .. US-$ 2.000.-

Totals ... .. .............. ... . .... .. .. . . . .. . .. . .. . . ................. ...... . .. .... .. . .

Paymetlls: Symposium Calgary (Schedule II) Symposium Quebec (Schedule III) ......................... . Symposium Tokyo (Schedule IV) .... .. .... .. ............. .. Symposium Leningrad (Schedule V) ............. .. .... .. .. .

Total paymen/J

Balances, 31st December 1971 .. . .... .... .. .... .. .. .... .

SUMMARY OF BALANCES (A) Unrestricted Funds .... .......... .... ...... .. . (B) Restricted Funds .......... .. ...... ...... ...... ..

Balances of BankJ, 31st December 1971 ..

U. S. Do/Jan

3.359.05

3.359.05

1.200.-2.500.-

1.693.-

5.393--

+ 2.033.95

2.593.37 + 2.033.95

559.42

Dulch Guilders

5.025.07

32.381.40

37.406.47

14.778.52

14.778.52

22.627.95

205.376.75 22.627.95

228.004.70

Delllsche Mark

55.031.01

30.814.19 54.08

544.39

86.443.67

-474.75

546.67 34.05

45.000.- *)

46.055.47

40.388.20

Deutsche M ark

+ 24.302.59

+ 24.302.59

+ 24.302.59

40.388.20 + 24.302.59

16.085.61

N .£>.

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REPORT 1971

I I

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I I I I

1\01'-CO "'0"<1'

cio\ci,..; 0\0,.....('(""1 \.0

I I I I


Payment of Annual Dues (as of 31 D ecember 1971)

1965

UK ...................... .. ........ 12 H ungary ........................ .. France ................ .. ........ .. . Czechoslovakia ..... . .......... .. Norway ............ ...... ....... .. Italy ...... ... .... .. ......... ..... . . Belgium .................. ...... .. . USA ...... .... . . .. ..... ....... ... . . Denmark .... . .... ....... . ..... . .. . Sweden ........... . .. .... ........ . India ................ ... .......... . Switzerland ...................... . Germany ...................... .. . . Israel ......... ................ .... . Spain ..... . ...... .. .............. .. Austria ... .. ........... .. . ... ..... . Japan ......... .. .... ............. .. Yugoslavia .......... .......... .. .. Poland . ..... .. ............. .. .... . . Netherlands .................... .. Finland ................ ....... ... . Rumania ... .. ..... .......... ... .. . USSR .......... .. ... . ............ .. Argentine ... ......... .. ... ... .... . Canada .. . ..... ... ......... ....... . Australia ........................ . . Portugal .......................... . Bulgaria ......................... ..

1 8 3

1 5

12

3 3 3 8 1 3 l 5 1 5 3

12 1 8

1966 1967 1968

12 12 12 1 8 3 I 3

12

3 3 3 8 1 3 1 5 1 5 3

12 1 8

1 8 3 1 3

12 1 3 3 3 8 1 3 1 5 1 5 3

12 1 8

1 8 3 1 3 5

12

3 3 3 8 1 3 1 5 1 5 3

12 1 8

Bank Accounts of IUTAM

1969 1970 1971

12 12 12 1 8 3 I 3 5

12 1 3 3 3 8 1 3 1 5 1 5 3

1 12

1 8

3

1 8 3 1 3

12 1 3 3 3 8 1 3 1 5 1 5 3

12 1 8 1 1 3

1 8 3

5 12

3 3 3 3 8 1 3 1 5 1 5 3

12 1 8

1 3

Treasurer: Prof. H. Gertler, Sonnhalde 90, D 78 Freiburg i. Br. (Germany) Chemical Bank and Trust Company, Brooklyn Branch, New York, N.Y. (USA) R. Mees en Hope, Oude Delft 165, Delft (Netherslands) Deutsche Bank A. G., Filiale Freiburg, D 78 Freiburg i. Br. (Germany)

28 REPORT 1971

Representation in other organizations ICSU

Prof. Maurice Roy, Vice-President of IUTAM, represents IUTAM in the Executive Committee of the International Council of Scientific Unions. CODATA

Prof. F. K. G. Odqvist acts as Representative of JUT AM at the Committee on Data for Science and Technology. (Report p. 31). COSPAR

Prof. Maurice Roy, Vice-President of IUTAM and President of COSPAR, acts as Representative of IUT AM on the Committee on Space Research. IUGG

The Bureau has appointed Acad. L. I. Sedov to represent JUT AM at the XV General Assembly of the International Union of Geodesy and Geophysics in Moscow, 1-4 August 1971. IFTOMM

IUT AM was represented by Prof. L. Sobrero at "The Third World Congress for the Theory of Machines and Mechanisms" in Kupari, Yugoslavia, 13-20 September 1971. IMCO

The Bureau has appointed Prof. K. Wieghardt as representative of IUTAM at the 4th session of the Joint Ad Hoc Group for the Study of External Forces Affecting Ships. (Report p. 30). IAF

The Bureau has appointed Prof. F. Haus to represent IUT AM at the 22nd Congress of the International Astronautical Federation. UNISIST

Prof. E. Becker participated in October 1971 in the Conference of the World Science Information System as an observer for IUTAM. (Report p. 34). SCOPE

JUT AM was represented by Dr. F. N. Frenkiel at the first General Assem-bly of the Special Committee on Problems of the Environment in Canberra, Australia, 1-3 September 1971.

Donations in 1971

At the 3rd General Assembly of IUT AM it has been decided to publish every year a list of persons and institutions who rendered support to IUT AM during the course of the past year. The Bureau is pleased to publish the fol-lowing list for the year 1971 :

The German Research Association provided generous financial support to refray all expenses of the office of the Treasurer of IUTAM in Freiburg i. Br.

INTERNATIONAL UN ION OF THEORETICAL AND APPLIED MECHANICS 29

The Presidium of the Academy of Sciences of the USSR, the USSR N atio-nal Committee on Theoretical and Applied Mechanics, Leningrad City Council, and Leningrad House of Scientists generously provided facilities and financial support to the IUTAM Symposium on Non-Steady Flow of Water at High Speeds.

The National Research Council of Canada, the Centre de Recherche Indu-strielle du Quebec, Universite Laval, and the Dominion Engineering Work Ltd. provided generous financial support to the IUTAM Symposium on Un-steady Boundary Layers.

The National Research Council of Canada, the Petroleum Recovery Rese-arch Institute, the University of Calgary, and the University of Toronto gene-rously provided financial support for the organization of the joint IUT AM/ IUGG Symposium on Flow of Multiphase Fluids in Porous Media.

30 REPORT 1971

APPENDICES

Report

of

the 4th session of the "Joint Ad Hoc Group for the Study of External Forces Affecting Ships".

IMCO, London, 22 to 24 November, 1971

At the previous session the Group had recommended a onetenth-power for-mula for the wind profile when the atmospheric stratification is in neutral con-dition. Recent tests have shown that - above sea - this condition is indeed found for all winds stronger than Beaufort 5 or 6, i.e. just when wind forces affecting ships become interesting. - Naval architects need to know also the probable duration and spatial extent of violent squalls, yet, here more data is needed to give advice.

A qualitative study of two trawler casualties was presented by W. J. Pier-son. He drew some most important conclusions emphasizing particularly the dangers associated with crossing waves and the formation of caustics in leading to very steep pyramidal waves in the lee of shallows such as the Dogger Bank. The Group agreed recommending that such situations should be studied by aerial photography or laser measurements to confirm the conclusions, that model tests relating to stability criteria should include experiments in crossing waves and that the dangers be emphasized for the attention of skippers and of hydrographers who might include warning notes in appropriate positions on navigation charts. - Theoretical and experimental work on wave refraction in shoaling water was given in two papers by Y. Y. Chao, resp. Chao and Pierson, New York University, Geophysical Res. Labs. TR-70-7 and TR-70-17.

A paper on a numerical wave prediction model for the North Atlantic was presented by J. A. Ewing. The method is capable of forecasting and hindcasting the wave spectrum in deep water from either forecasts or past observations of the wind field with sufficient accuracy for most engineering purposes.

The Group thought that visual observations of the sea state are not reliable for most scientific purposes but for many engineering applications they are the only information currently available. Estimates of wave height are much more reliable than those of wave periods.

The Group will meet again in early 1973, possibly simultaneously with the Sub-Committee on Subdivision and Stability of ISSC (Intern. Ship Structure Congress).

K. Wieghardt, Hamburg.


Report on CODATA

This Report on the activities of CODATA and related things during 1971 is based upon the following documents: (1) Agenda and Draft of the Minutes of the 6th Annual Meeting of CODA-

TA, held at the National Academy of Sciences, Washington, D. C., July 1971.

(2) CODATA Newsletter nr. 6, June 1971 (3) CODATA Bulletin nr. 3 '(Data for Chemical Kinetics)

CODATA Bulletin nr. 4 (Computer Use) CODATA Bulletin nr. 5 (Key Values for Thermodynamics) CODATA Bulletin nr. 6 (Key Values for Thermodynamics, Part II) Bulletins nr. 3-6, December 1971

( 4) Professor E. Becker's Report on UNISIST to IUTAM Bureau, November 1971.

The Second COD AT A Conference and 6th Annual Meeting of CODAY A: Washington, D. C., July 1971.

The main items of the Agenda of interest to IUT AM (numbered as in the Agenda) read as follows:

IV. The present and fttlure scope of CODAY A

The International Unions IUGG and IUBS as well as officers of ICSU had recommended the broadening of the scope of COD AT A to provide the pos-sibility of covering not only property data of substances, but also time and location dependent data. At the Bureau meeting of CODATA the members decided to take appropriate action. It was further felt that COD AT A should strengthen the role of its member Unions, by active cooperation with their scientific commissions. CODATA's own activities would concentrate on ques-tions of general interest, as for instance Computer Use, Terminology, Presen-tation of Data etc.

In the foltowing discussion prof. Edsall asked for classification about the statement that CODATA should have on behalf of ICSU responsibility for co-ordinating and transmitting requests for financial support. He thinks that the budget of a Union Commission should be settled by the Unions themselves, rather than going through COD AT A. Dr. Branscomb mentioned that COD A-T A, as part of its umbrella function, should be willing to pass forward to UNESCO or UNISIST requests from Unions or Union Commissions, if UNESCO insists that the funding requests come from CODATA. There is no intention whatsoever that COD AT A should start as a censor of the finances of the Commissions. Dr. Rossini thinks that a Commission or Union might wish to have the prestige and status of CODATA for support.

32 REPORT 1971

Dr. Eiiezer was interested to learn how the duplication of CODATA ef-forts are justified e.g. in the case of the Task Group on Thermodynamics. In his answer Dr. Branscomb considers thermodynamic data useful to a very large group of scientists in more than one Union. The Task Group has issued sets of key values for Chemical thermodynamics in CODATA Bulletin nrs 5 and 6, December 1971, and the Task Group for Chemical Kinetics in Bulletin nr 3, December 1971.

The remaining discussion hardly seems to be of interest to IUT AM, all the more as we do not work in Commissions, actively engaged in collecting data for critical evaluation.

V. CODAY A and UNISISTfUNESCO

Prof. V odar reviewed the general position of CODATA within the field of documentation and information. On request of prof. Vodar, Prof. Riegel outlined the close relation between abstracting services and data centers. There are between 35 and 50000 primary journals in science and technology which have to be processed by the abstracting and indexing services. It is estimated that the total budget of the ICSU Abstracting Board member services (largest of its kind in the world) is about 50 Million Dollars per year. The tertiary literature, comprising reviews and critical numerical data compilations, is said to be of particular importance because of the compression factor.

Dr. Branscomb commented that the work of ICSU Abstracting Board and COD AT A is complementary and that this is another argument for broadening the scope of COD AT A to match the already broadened scope of the ICSU Abstracting Board.

Personally, I believe that IUT AM should not expect too much of interest in these services.

Dr. Schafer stated that UNESCO/ UNISIST consider the evaluation aspect of information of paramount importance in the future information system. Sir Gordon Sutherland and Dr. Branscomb would like to see COD AT A take cautious steps regarding the relation with UNISIST. Prof. Vodar agrees that there is a slight confusion, but in spite of it he considers it important to estab-lish close relation between COD AT A and UNISIST.

VII. Status of the Work of Present COD AT A Task Groups

1. Computer Use The Computer Task Group is a heterogeneous group, composed of mem-

bers from different disciplines. At the last meeting of the Task Group in March 1971 in Paris, it was agreed to concentrate efforts to the following three tasks.

(a) To act in an advisory capacity to the Bureau on matters concerning computer technology.

INTERNATIONAL UNION Of THEORETICAL AND APPLIED MECHANICS 33

(b) To act in an educational capacity in bringing new developments and techniques to the attention of the CODATA members.

(c) To act as focus for the interchange of information and co-ordination of effort among computer specialists.

With regard to item (c) the Task Group is planning to organize a sym-posium in 1973 under the chairmanship of Dr. Olga Kennard, IUCr.

2. Task Group on Data for Chemical Kinetics and

3. Task Group on Key Values of Thermodynamics have been mentioned above under item IV.

VIII. Possible New Task Groups 1. T hermodynamics

Prof. Sunner, Chairman of the present Task Group on Key Values for Thermodynamics, considers the question of a possible extension of this group to a broader Task Group on Thermodynamics as premature. In the opinion of Sir Gordon Sutherland such broader Task Group would be more appropriate for IUP AC than for CODATA.

6. High Pressttre

The possible establishment of a Task Group on High Pressure and of Steam Tables is not a subject of further discussion, since the new category of "Associate Organization" would allow links of AIRAPT (International Asso-ciation for Advancement of High Pressure Science and Technology) and lAPS (International Association of the Properties of Steam).

To this I would like to add the following comment. Prof. N. Frossling, Swedish observer on the Executive Committee of lAPS has informed me of the activities of lAPS. There is in 1972 committee work going on to prepare the Eighth International Conference of lAPS. Why could not IUTAM appoint Prof. Fri.issling, who is incidentally Secretary of the Swedish National Com-mittee on Mechanics, as its representative andj or observer at the lAPS mee-tings? The activity of lAPS seems to me from several aspects to be of more direct interest to IUTAM than those of CODATA.

XII. The 3rd COD AT A Conference and 7th Annual Meeting of CODAY A is due to take place at the Castle of Marie Antoinette, Le Creusot, France, dur-ing the period 30 June - 1 July 1972.

From the proposed Agenda we may note III, a. Approval of the Minutes of the 6th Annual Meeting of CODATA upon which this Report has been based.

IV. The broadened scope of CODATA.

VII. CODATA and UNISIST. Falke K. G. Odqvist

34 REPORT 1971

Report

on

Intergovernmental Conference for the Establishment of a World Science Information System (UNISIST)

Unesco-House, Paris, 4- 9 October 1971

1. Background In view of the so-called "information crisis" the General Conference of

Unesco in 1966 and 1968 authorized the Director-General of Unesco to under-take and to complete jointly with ICSU a feasibility study on the establishment of a world science information system. The acronymic name UNISIST was choosen for this system. In 1967 a UnescoJICSU Central Committee was created to carry out the feasibility study. Professor Harrison Brown (geo-chemist, Caltech, Pasadena USA), who is Vice President of ICSU, was the convenor and chairman of the Central Committee. He submitted the final report of the Central Committee to the Director General of Unesco and the President of ICSU on 1 October 1970. This report is a painstaking, but lengthy docu· ment of 161 double-column pages, which I had no time to read carefully. A shorter synopsis of 92 pages contains all the recommendations and much of the philosophy of the complete report. The synopsis was used as basis of the discussions at the UNISIST Conference. Unfortunately, the synopsis, although condensed from the original report, is still a verbose, repetitive document, dealing in generalities. Although I read the document twice it gave me only a rather vague idea of the proposed course of action for the establishment of a world science information system. (Incidentally, the impression that the report is vague was obviously shared by other participants in the UNISIST-Confe' renee, since, for example, the delegation from Canada stated at one time that it is not prepared for unqualified support of UNISIST till more specific aims are formulated.)

The report of the Central Committee contains 21 recommendations. Instead of listing these recommendations I cite part of the preface to the synopsis; where the broad principles underlying the UNISIST programme are clearly stated. The recommendations are not much more than an expanded and often less clear version of these statements; '(Synopsis, p. VIJVII): the unimpeded exchange of published or publishable scientific information and

data among scientists of all countries; hospitality to the diversity of disciplines and fields of science and technology as

well as to the diversity of languages used for the international exchange of scientific information;


promotion of the interchange of published or publishable information and data among the systems, whether manual or machine, which process and provide information for the use of scientists;

the co-operative development and maintenance of technical standards in order to facilitate the interchange of scientific information and data among systems;

promotion of compatibility between and among information processing systems developed in different countries and in different areas of the sciences;

promotion of co-operative agreements between and among systems in different countries and in different areas of the sciences for the purpose of sharing workloads and of providing needed services and products;

assistance to countries, both developing and developed, wishing access to con-temporary and future information services in the sciences;

the development of human and information resources in all countries as necessary foundations for the utilization of machine systems;

the increased participation of scientists in the development and use of infor-mation systems, with particular attention to the involvement of scientists in the evaluation, compaction, and synthesis of scientific information and data;

the involvement of the coming generation of scientists in the planning of scientific information systems of the future;

the reduction of administrative and legal barriers to the flow of scientific infor-mation between and among countries. The principles here enunciated are basic for the improvement of the inter-

national flow of scientific information. One of the main conclusions of the Central Committee was (synopsis,

p. XIII) that "a programme to guide, interpret, and stimulate actions leading to increased voluntary cooperation among information services is a first es-sential. For the purpose of launching this action programme, an intergovern-mental conference is suggested."

2. Organhation of the confer.ence The intergovernmental conference suggested in the report took place from

4 - 9 October at Unesco-House in Paris. Nearly all the governments of states which are members of Unesco had sent delegations. Each of these delegations had one vote. In addition, a large number of ON-organizations, intergovern-mental organizations and nongovernmental organizations had sent observers. One of these nongovernmental organizations was ICSU which was represented by about 10 people. I was a member of the ICSU group on behalf of IUT AM. Observers had the right to speak, but not to vote. Immediately after the opening of the conference Professor Harrison Brown was elected President of the Con-ference. He guided the conference superbly and with aplomb. He was assisted by a steering committee, a drafting committee and a "rapporteur general" as well as by seven vice-presidents who were also elected at the first session.

36 REPORT 1971

Although their election and the political bickering preceding the election took some time, only one of them ever became active by once announcing the adjourn-ment of a session. Only plenary sessions took place, but much work was done behind the scenes by the drafting committee and the steering committee. The opening session of the conference brought, apart from opening addresses by the Director General of Unesco, Rene Maheu, by the President of ICSU, V. A. Ambartsumian, and by Harrison Brown, a rather disappointing show of political rhetoric. But my fear that the whole conference would be spoiled by ideological differences was unfounded. With only one exception all delegations quickly came down to business and concentrated on the factual problems. The result of five days of discussion is a final resolution.

Although I took copious notes of all statements, comments and remarks made during the conference sessions, it is quite impossible to report on every detail of the discussions. Hence I will try to concentrate on the main trends as they are reflected in my mind.

3. Developing versus developed countries When I came to Paris it was with the notion that the "information crisis"

consists mainly of an over-abundance of information and the concomitant dif-ficulty or near impossibility to find out the relevant information from the total mass of information ("information explosion") . Obviously this idea was also uppermost in the minds of the members of the Central Committee who authored the feasibility study report. But I quickly realized that the informational problems of many countries, namely the "developing" countries, are quite different.

Since these countries are a majority, a considerable part of the discussions concentrated, contrary to my expectations, on their problems, although only the last two of the 21 recommendations of the feasibility study report concern deve-loping countries explicitly.

The developing countries complain of a dearth of information, and, since scientific and technological know-how are certainly necessary for development, they think that their difficulties in raising the standard of living are simply caused by the lack of proper information. Most of these countries show a naive and rather moving optimism by believing that the unimpeded flow of infor-mation from the developed to the developing countries will miraculously solve all their problems and catapult them into a technological paradise which today is exclusively usurped by developed countries. The dangers and the concomitant failings of precipitant technological development, which have caused very serious flaws in our "paradise", were never mentioned.

A prerequisite for acquiring information is an adequate infrastructure of information facilities. This in turn can be built and sustained only by trained man-power. One of the foremost demands of the developing countries is there-fore that those countries having already the expertise in information technology


establish training centers for information technologists (librarians, specialists in computer processing of information etc.). Only rarely the need to train not only information staff but also the potential users of information in handling the tools of information was mentioned. The undeniable fact that the possession of technological information does not mean that technological development will automatically occur was stated only once.

Recognizing the training problem Poland submitted two draft resolutions. The first of these offers a complex of buildings near Katovice (Poland) as site of a training center. The second one proposes the establishment of an inter-national fellowship pool of UNISIST, based on financial shares contributed by countries which become members of the pool, and intended for the training of information staff from developing countries.

Another complaint of developing countries is the high cost of 1) building an information infrastructure, and of 2) acquiring information. Here the trend is to demand substantial help or even complete funding from Unesco, UN-organizations or the "rich" countries. In the discussion the profit-motivated economic structure of the "capitalist" countries was often attacked - as well as several times defended - and it was demanded that information should be free of charge, or that at least the costs paid for information should be lower for developing than for developed countries. Interestingly, the international copy-right convention was frequently assailed by developing countries as impeding or preventing the flow of information. An observer of the International Publishers Association defended the copyright convention. He informed the audience of a substantial alleviation of the restrictions to reprint and translate scientific literature in developing countries. This alleviation was recommended by a Unesco group in July 1971 and will be speedily ratified. On the other hand, the observer cautioned the conference not to neglect the rights of authors ; such a neglect might result in a qualitative deterioration of literature. There was a general consensus that copyright laws need continual review and, if necessary, revision.

The feelings of the developing countries with respect to UNISIST can be summed up by the remark that they do not want to become new markets for the information services of developed countries, but that they want to share in the system on an equal basis with the developed countries.

4 . Scope of UNISIST An issue much debated at the conference was the scope of the UNISIST

programme. Although it is not explicitly stated in the feasibility study report, the authors of that study originally had in mind an information system restricted to natural sciences in the traditional sense. This represents one extreme standpoint regarding the scope of UNISIST. At the time of the conference it was quite clear, also to the authors of the report, that technology cannot be excluded. On the one hand, science and technology are so intimately and or-

38 REPORT 1971

ganically connected that the boundary between them is not strictly definable, and modern documentation services make no distinction between them. On the other hand, the developing countries prodominantly need information on ap-plied science and engineering and only to a much lesser degree information on basic science. Also, the developing countries frequently stressed their demand for information in agriculture, medicine and economics.

The other extreme standpoint regarding the scope of UNISIST was re-presented by the delegation from the Federal Republic of Germany. This dele-gation submitted a number of "comments", one of the comments stating that the social sciences (whatever that term may mean) and the arts should be in-cluded. In the discussion the humanities were also mentioned. The rather lame justification for spreading the UNISIST programme so much was the remark that interdisciplinary projects are of growing importance. For a reason which I shall explain below it seems to me typical that such an all-encompassing scope of UNISIST was proposed by a developed country and supported in statements by the International Federation of Library Associations and the International Federation for Documentation, but never even mentioned by less developed countries. On the contrary, many of the developing countries recommended restriction to science and technology. In my view - and I share my view with most of the delegations - the whole UNISIST programme would be completely unfeasible and be doomed to failure if it should comprise ab initio all infor-mation (and ideologies) produced and collected by human minds. The con-ference settled on a reasonable compromise and recommended a step by step implementation of UNISIST, beginning with science and technology and sub-jects immediately related to them and then gradually widening the scope.

5. Scientists t 'erS11S injo1'matiou specialists The individuals interested in a world wide information system can roughly

be divided into three groups: the information specialists, the producers of in-formation, and the users of information. Of course, no rigid boundaries between these groups exist. The developed countries usually have an establishment of information specialists. The German proposal of an all-encompassing scope of UNISIST was obviously dictated by the interests of the information specialists ' establishment. For them handling and processing information is a job, and the larger the mass of information, the better for them! Although without infor-mation specialists a programme like UNISIST certainly cannot be implemented, I feel it would be too dangerous to let the programme completely fall into their hands because this would probably lead to a gradually increasing disregard of the needs of users and producers of information. In that context it is illumi-nating to compare different amendments of draft resolution "'= 15 which was the starting point for the composition of the final resolution. The original draft "'= 15 stipulates that the Director General of Unesco establish "in consultation with ICSU and other appropriate organizations an Advisory Committee ... ".


The German delegation proposed the following formulation: " ... with ICSU and other organizations active in the information and documentation field . .. " . The delegation from USA amended the text still further: " ... Advisory Com-mittee of scientists and information specialists."

Besides being users of information the scientists are the producers of infor-mation. The creative scientists on top of the scientific pyramid usually have the least demand for information services of the kind envisaged by the UNISIST programme. Personal knowledge of and informal contacts between these scientists ensures a rapid and efficient flow of information among this group. Several times the role of congresses and symposia was mentioned. These are certainly highly effective in the dissemination of the most modern scientific information, but they are more or less outside the UNISIST programme. UNISIST concerns the "vertical" flow of information from the producers to the users, and not so much the " horizontal" flow on the level of the productive scientists.

Dearth of information is no complaint of active and productive scientists. Their problem is the ever increasing deluge of information, much of it ir-relevant, unimportant and repetitive. Therefore a foremost concern of this group of people is the necessity to analyse, critically evaluate, and condense information. This concern was voiced by a number of scientists, in particular by Professor Ambartsumian, President of ICSU, and Professor Brown, Chair-man of the UNISIST Conference, in their opening addresses. At least two re-commendations in the feasibility study report recognize the importance of "quality control" and critical assessment of scientific literature. In that context the role of abstracting and reviewing services and journals was stressed, and the work of CODATA (the ICSU Committee on Data in Science and Techno-logy) in the coordination and critical evaluation of numerical data collection activities was mentioned. Moreover, it was stated that projects like the "Annual Review" series (e. g. "Annual Review in Fluid Mechanics" ) are highly valuable and that work of that kind should be systematically spread and strongly sup-ported.

I too feel that the last-mentioned activities of integration, coordination and elimination of irrational overlapping are of tremendous importance and that they are a main responsibility of the scientific community. Scientists who are motivated by a synthesizing spirit should be encouraged. I also think that these activities are well suited to satisfy needs of the developing countries and of those engaged in "interd isciplinary projects". Unfortunately the concern with the evaluative role of a possible information system found scarcely entrance into the final resolution. This may reflect the preponderance of the pure infor-mation specialists on the delegations of the developed countries. My suspicion is perhaps proved by the fact that the German delegation felt obliged to state explicitly in one of its "comments" that "quality control mentioned in this re-commendation (* 11 of the feasibility study report] with regard to scientific

40 REPORT 1971

journals is not the concern of information specialists". Obviously the informa-tion specialists are glad to leave the task to the scientists!

6. First steps of implementation As was to be expected of a large intergovernmental meeting, the UNISIST

Conference served mainly as a forum for stating principles and general guide-lines for future action. It was stated several times that a discussion of details and technicalities was not the purpose of the conference. The problems and desires were clearly enunciated, but not much was done to find and define ways to implement the recommendations given. At the end of the conference many of the participants were left with the question: "How will the work continue after the conference?" I admit that I belong to those who have no definite answer to the question. The final resolution is of no great help. The only definable action recommended in the report is the establishment of two com-mittees and a secretariat. It is now up to these bodies to find the means of implementing the UNISIST programme!

But, certain trends were clearly discernible at the conference, and I shall briefly mention them. Most delegations agreed on the principle that UNISIST should not establish a new information system ab initio, but that UNISIST should be based on existing information systems of national, regional or inter-national scope. As an example of such a regional system the information service established by the COMECON-countries with its center in Moscow was mentioned. UNISIST should make the most of such systems and get off the ground by inducing a gradually evolving cooperation between the existing systems. The growing network should be flexible enough to accomodate new additions at any time. A first step in the direction of such cooperation is an inventory and an evaluation of existing information systems. The logical second step is a concerted effort at standardization. Since I am no specialist in the information business I didn't understand all the details which were mentioned with regard to standards, rules and common procedures. But, it is quite clear to me that without standardization of bibliographic descriptions, without ensuring the exchangebility of computer programs for information retrieval, etc., no effective cooperation is possible. The use of telecommunication facilities for speeding up information retrieval was mentioned several times; of course, a prerequisite is again standardization. Obviously much remains to be done in the field of unifying the form in which bibliographic information is presented, even in developed countries. It was mentioned that today no universally adopted rules of citation, of abbreviating journal names, etc., exist.

A related problem is that of transliteration. This was mentioned in particular by the Japanese delegation. That delegation also expressed concern over the language barrier and stressed the importance of translation services in the framework of a worldwide information system.

With respect to the needs of developing countries a step by step realization


of the UNISIST programme could be started with a few pilot projects. These projects would serve to create the necessary information system infrastructure in a few selected countries or regions of the globe. The projects should be financed by a redistribution of Unesco funds, by other ON-organizations or by development funds of advanced countries.

The recurring theme in the discussion about implementation of the UNISIST programme was the realization that UNISIST should be an exercise in the art of the possible by progressively implementing the recommendations given in the final resolution. UNISIST should not jeopardize the chances for success of its programme by hastily trying to do too much too soon. Its actions should be based on objective scientific principles and not on political prejudices. It remains to be seen whether this will prove possible.

7. Conclusions I think I have briefly touched on every important issue brought up at the

UNISIST Conference. I was sent by JUT AM to the conference and therefore the question arises: what are the conclusions to be drawn from the foregoing with respect to the work of IUT AM? I have no recommendations to make, but a few observations come to my mind:

If one discerns between an informal exchange of information, through talks, symposia and conferences, and a formal information flow, through established information carriers like journals etc., then IUTAM is almost exclusively engaged in the informal information exchange. This type of exchange, though very effective and important on the level of information producers, is probably not very effective in passing information to a large group of users and it is certainly more or less outside the UNISIST programme. The only formal out-come of the JUT AM activities is the proceedings of our symposia and con-gresses. In that context I might mention that the delegation from one of the developing countries asserted the tremendous importance for them to receive such proceedings since they reflect the current state of art in specific fields. Probably we should try to ensure wide distribution of our published procee-dings also in those countries which are not yet actively promoting the science of mechanics. The interests of the sales department of the publisher of the proceedings might not accurately reflect the needs of the users.

In the last few years I have attended two CODATA meetings, as a proxy for Professor Odqvist, the IUT AM representative with COD AT A. At these meetings I recognized that the other member unions of ICSU differ from IUT AM insofar as nearly all of them have organizational devices to cope with the collection, evaluation and dissemination of information. For example, most of the unions have special committees and subcommittees responsible for collecting and evaluating numerical data in particular fields covered by the union. (The International Astronomical Union boasts of nearly 40 different committees! One of the purposes of CODATA is the coordination of such

42 REPORT 1971

activities in collecting scientific and technological data). I also mention the abstracting services organized on the initiative of some unions. Finally, many of the unions have established commissions for standardization of nomenclature, symbols etc. This, of course, provides a natural link between the activities of these unions and the aspirations of UNISIST. At the UNISIST Conference the World Federation of Engineering Organizations was also represented by an observer. He made a brief statement explaining that the engineering organiza. tions are also very active in the field of standardization, data evaluation, index-ing and in the information business in general. He demanded for his federation a place in UNISIST as ICSU already has.

IUT AM lacks all that. In my reports on IUTAM activities, which I gave at the two CODATA meetings mentioned above, I explained this lack by mentioning that we are of course users of data of diverse kinds but that we only rarely produce numerical data of the "hard" type which are at the present time the sole concern of CODATA (e. g. precise numerical values of properties of substances not changing with time and place, such as spectroscopic data). However, as a tremendous amount of new information is generated within IUTAM bounds, I think, IUTAM cannot forever completely neglect the task of organizing, evaluating, sifting and properly disseminating that information. Certainly much could be done with little effort to encourage work of that type among IUT AM members, to reduce overlap of work already going on, e. g. in the reviewing field, and to coordinate such work. The problems and necessities existing here deserve to be brought to the attention of all those whose scientific activity is covered by IUT AM.

Ernst Becker


STATUTES Statuts de I'Union lnternationale

de Mecanique Theorique et Appliquee

PREAMBULE Afin de contribuer plus efficacement au developpement de la science de Ia

Mecanique, le Comite International des Congres de Mecanique Appliquee avait decide, lors de sa reunion a Paris en septembre 1946, de fonder une organisation permanente portant le nom d' «Union Internationale de Mecanique Theorique et Appliquee».

Cette Union a ete admise dans le Conseil International des Unions Scienti-fiques par decision du Comite Executif de ce Conseil en 1947.

Dans les reunions tenues a Londres en septembre 1948, il a ete decide que le Comite International continuera, en tant que corps independant de !'Union, a organiser, comme par le passe, les Congres Internationaux de Mecanique Appliquee et que ce Comite aura le Statut d'une organisation adherente a !'Union.

Lors des reunions de Munich en aout-septembre 1964, il a ete decide que le Comite International pour les Congres de Mecanique Appliquee serait dis-sous comme un organisme distinct et possedant le statut d'organisation adherant a !'Union, et qu'il serait remplace par un Comite permanent pour les Congres Internationaux comme un organisme permanent et integre dans !'organisation de !'Union sous le nom de « Comite pour les Congri:s Internationaux ». 1

I L'Union Internationale de Mecanique Theorique et Appliquee a pour buts :

a) De former un lien entre des personnes ct des organisations nation ales ou internationales s'occupant de recherches scientifiques ( theoriques ou experi-mentales) dans le domaine de la mecanique ou des sciences connexes.

b) D'organiser les Congres Internationaux de Mecanique Theorique et Ap-pliquee par l'intermediaire du Comite permanent des Congres et d'organiser

1 Modification approuvee par l'Assemblee Generale du 2 septembre 1964 a Munich et devenue effective a partir du 4 septembre 1964.

44 REPORT 1971

d 'autres reunions internationales sur des sujets du domaine de Ia mecanique theorique et appliquee. 1

c) De prendre toutes autres initiatives propres a contribuer au developpement scientifique de Ia mecanique theorique ou appliquee.

II L'organe actif de !'Union Internationale de Mecanique Theorique et Ap-

pliquee est son Assemblee Generate. L' Assemblee Generate a pouvoir de decision pour toutes les questions con-

cernant !'Union, y compris Ia modification des statuts. Elle peut deleguer ce pouvoir pour des sujets specifies a des organes appropries.

La composition de I' Assemblee Generate est reglee par l' article IV.

II A2 a) L'Assemblee Generate etablit un Comite permanent des Congres qui

est responsable pour !'organisation des Congres internationaux de mecanique et appliquee a intervalles reguliers.

b) Le president de !'Union est aussi president du Comite des Congres. Les membres du Co mite des Congres sont nommes par I' Assemblee. Generate en tant que personnalites scientifiques activement engagees dans Ia mecanique theorique et appliquee sans etre necessairement membres de I' Assemblee Gene-rate.

c) Le Comite des Congres nomme un Secretaire, sans duree definie de fonc-tion.

d) Les regles de fonctionnement du Comite des Congres doivent etre ap-prouvees par l' Assemblee Generale.

III Des organisations s'occupant d'etudes scientifiques dans le domaine de l.a

mecanique theorique ou appliquee ( ou des unions nationales de telles sations) peuvent etre admises par l'Assemblee Generale comme orgamsatwns adherentes de !'Union Internationale.

Chaque organisation adherente des 1' As.sem?Iee rale de !'Union et paiera une souscnptton annuelle a l Umon, d apres les mdt-cations de I' article IX.

1 Modification approuvee par l'Assemblee Generale du 2 septembre 1964 a Munich et devenu effective a partir du 4 septembre 1964.

2 Addition approuvee par l'Assemblee Generale du 2 septembre 1964 ti Munich et devenue effective a partir du 4 septembre 1964.


III Al Des organisations internationales principalement actives dans des domaines

scientifiques etroitement lies a ceux de !'Union peuvent etre admises par 1' As-semblee Generate en qualite d'organisations affiliees a IUTAM.

Chaque organisation affiliee est autorisee a deleguer a I' Assembtee Ge-nerate un observateur, lequel est admis a prendre part sans voix deliberative aux reunions de 1' Assemblee.

L'organisation affiliee s'oblige a tenir le BUREAU de IUTAM (cf. section VII) informe de toutes ses activites importantes et des mesures de portee inter-nationale qu'elle adopte. L'organisation affiliee admet dans Ia composition de son conseil scientifique ou de J'organe qui en tient lieu un representant de !'Union Internationale designe par celle-d.

En vue de coordonner les activites scientifiques internationales chaque organisation affiliee s'oblige, Jorsqu'elle considere dans son domaine !'organisa-tion d 'une telle reunion, a prendre en soigneuse consideration Jes projets et decisions deja formes en ce qui touche au meme domaine par !'Union Inter-nationale et ses autres organisations affiliees.

Les organisations affiliees ne versent aucune cotisation annuelle a !'Union Internationale.

IV L' Assemblee Generate de !'Union lnternationale de Mecan ique Theorique

et Appliquee est formee par: a) Les representants des organisations adherentes a !'Union. b) Les membres elus par I' Assemblee Generale de !'Union, qui doivent etre

des personnes s'occupant effectivement de recherches scientifiques dans le domaine de Ia mecanique ou des sciences connexes.

c) Si I'Assemblee Generale en decide ainsi, des representants de Commis-sions de !'Union. 2 Le nombre des membres elus de I' Assemblee Generale appartenant a une

meme nationalite ne devra pas, en general, depasser cinq. Des exceptions pour-rant etre faites seulement par decision de 1' Assemblee Generale.

La duree du mandat de chaque membre elu sera fixce par J'Assemblee Gene-rale au moment de son election.

L' Assemblee Generale veillera a ce que soient representes de appro-priee les pays dans lesquels sont effectuees des recherches importantes de meca-nique theorique ou appliquee, mais dans lesquels n'existe pas encore d'organi-sation nationaJc::.

I Addition approuvee par I'Assemblee Generale du 27 ao('tt 1970 a Liege. 2 L'Assemblee Generale du 2 septembre 1964 a Munich a decide d'admettre comme

Membre de I'Assemblee Generale un Representant du Comite des Congres de IUTAM (voir article II A).

46 REPORT 1971

v Dans le cas ou il est necessaire d' effectuer un vote, cha<J_ue membre de l' As-

semblee Generale dispose d'une voix. Tout membre empeche d'assister a une reunion peut, par lettre adressee au Secretaire de !'Union, constituer comme son mandataire un autre membre de 1' Assemblee General e.

Les decisions ordinaires et les elections soot faites a Ia majorite des votes exprimes. Pour toute modification des statuts, Ia majorite doit etre les 2/3 des voix.

Dans 1' intervalle entre les reunions de I' Assemblee Generale, le vote peut a voir lieu par correspondance sur propositions faites par le Bureau (article VII) ; dans ce cas, une decision ne sera valable que si le nombre des personnes participant au vote est au moins les 2/3 du nombre total des membres de 1' As-

Generale.

VI Les reunions de 1' Assemblee Generale auront lieu aux moments fixes par

le Bureau ou sur demande de dix membres au moins de 1' Assemblee General e.

VII Afin de maintenir son activite dans 1' intervalle entre les reunions de I' As-

semblee Generale, celle-ci nomme un Bureau compose : d'un president, du president sortant, vice-president, d'un secretaire, d'un tresorier, et de <J.Uatre autres membres de I' Assemblee General e. Les membres du Bureau soot elus pour une periode de <J.Uatre ans au maxi-

mum et soot reeligibles. Les membres nouvellement elus entrent en fonction le 1 cr novembre qui suit I' Assemblee Generale <J.Ui les a elus.

Le Bureau doit se reunir au moins une fois par an. Tout membre du Bu-reau peut, en prevenant par lettre le secretaire, se faire remplacer par un autre membre de IAssemblee Generale, s'il lui est impossible de prendre part a une reunion.

Le role du secretaire est d'assurer les liaisons permanentes pour tout sujet interessant !'Union, y compris les relations avec les organisations adherentes ou etrangeres a !'Union.

Le siege legal de !'Union est la residence du secretaire. Le Bureau est autorise a nommer des tresoriers adjoints dans les pays ou

!'Union a un compte en ban<J_ue. Les tresoriers ad joints doivent etre membres de 1' Assemblee Generale, mais

ne soot pas necessairement membres du bureau.

INTERNATIONAL UNION O F THEORETICAL AND APPLIED MECHANICS 47

VIII Les moyens financiers de !'Union proviennent :

a) des souscriptions annuelles des organisations adherentes; b) des dons ou subventions.

L'Union etablit chaque annee une liste de bienfaiteurs, dans !a<J_uelle son't inscrits les noms des personnes ou des institutions <J.Ui ont accorde des dons, des legs ou autres subvention a !'Union.

Le Bureau de !'Union etablit un budget pour chaque annee et administre les finances. II doit soumettre un rapport financier annuel aux membres de I' Assemblee Generale.

IX Le nombre de representants d'une organisation adherente et le montant de

Ia souscription annuelle a payer par cette organisation seront regles d 'apres le bareme suivant sur proposition de 1' organisation adherente et apres approbation de 1' Assemblee Generale de !'Union.

Nombrede Unites de Categorie representants souscription annuelle 1

I 1 1 II 2 3

III 3 5 IV 4 8 v 5 12

Le montant d'une unite de souscription annuelle sera de $ 1001 USA, ou son equivalent en monnaie du pays a Ia date du paiement.

X Dans toutes ses decisions, 1' Assemblee Generale s' inspirera de Ia tradition

de cooperation scientifique libre et internationale qui s'est developpee dans les Congres Internationaux de Mecanique appliquee.

XI Le present texte fera autorite pour !'interpretation a donner aux

statuts.

1 Modification apportee a Ia suite du vote de I' Assemblee Generale de Herrenalb (l'AIIemagne), 12 septembre 1969.

48 REPORT 1971

Resolution de I'Assemblee Generale de Pallanza (27 juin 1950)

En confirmation des opinions exprimees precedemment a I' Assemblee Ge-nerale de septembre 1948 au moment ou les presents statuts ont ete adoptes :

1. L' Assemblee Generale estime que, dans les pays ou il existe plus d'une organisation nationale active dans le champ de la mecanique theorique et ap-pliquee, un comite special de coordination doit etre forme. En general, il est convenu de reconnaitre sculement une organisation adherente dans chaque pays.

2. L' Assemblee Generale estime que sa composition devra etre graduelle-ment modifiee de fac;on a ce qu'elle comprenne principalement les representants des organisations adherentes a J'Union, Ia categoric des membres elus devant etre reservee pour des cas particuliers et exceptionnels. Dans ce but, elle donne avis de son intention de reduire le nombre des membres elus Jorsque, en 1952, ils serront arrives au terme de leur mandat.

Regles de fonctionnement 1 du Comite des Congres de IUTAM (4 septembre 1964)

1. Le Comite des Congres se reunit au moins une fois lors de chaque Congres.

2. Le Comite des Congres peut instituer un Comite Executif charge d'entre-prendre toutes les actions necessaires de sa part pendant la periode qui s'ecoule entre deux Congres successifs, et de lui faire un rapport a sa prochaine reunion. Le Comite Executif comprendra Je president et Je secretaire du Comite des Congres et un ou plusieurs membres designes par le Comite des Congres.

3. L'organisation effective d'un Congres est confiee a un Comite local d'Or-ganisation, elu par le pays ou !'organisation qui invite, et ce Comite est egale-ment responsable de Ia publication des Comptes Rendus du Congres. Le Co-mite d'Organisation fera son rapport au Comite des Congres soit au cours du Congres qu'il organise, soit avant, s'il le juge preferable.

4. Le Comite d'Organisation devra obtenir !'approbation du Comite des Congres (normalement par l'intermediaire du Comite Executif) pour toutes Jes affaires qui se rapportent a Ia politique generale du Comite des Congres, en particulier pour celles qui concernent:

1 Regles approuvees par I'Assemblee Generate du 2 scptembre 1964 a Munich et devenues effectives a partir du 4 septembrc 1964.

INTERNATIONAL UNION OF THEORETICAL AND APPLIED MECHANICS

4.1 le but du Congres; 4.2 Ia selection des communications pour le Congres; 4.3 le choix des lectures generales pour le Congres; 4.4 Ia designation des presidents de sessions du Congres.

49

5. Le Comite d'Organisation percevra, au nom de !'Union Internationale de Mecanique Theorique et Appliquee, de tous les membres du Congres une contribution supplementaire ne devant pas depasser $ 1 pour couvrir les de-penses administratives, en plus de Ia contribution pour Ie Congres !ui-meme. Les contributions supplementaires seront reversees a IUT AM immediatement apres le Congres.

Statutes of the International Union of Theoretical and Applied Mechanics

PREAMBLE In order to be more fully equipped to promote development of the science

of mechanics, the International Committee for the Congresses of Applied Me-chanics at its meeting at Paris in September 1946 decided to found a perma-nent organization, called "The International Union of Theoretical and Applied Mechanics".

This Union has been admitted into the International Council of Scientific Unions by decision of the Executive Committee of this Council in 1947.

At the meetings at London in September 1948 it was decided that the Inter-national Committee would continue to organize the Congresses of Applied Me-chanics as an independent body as in the past, and that the International Com-mittee would have the status of an adhering organization of the Union.

At the meetings at Munich in August-September 1964 it was decided that the International Committee for the Congresses of Applied Mechanics would be dissolved as an independent body with the status of an adhering organization of the Union, and that it would be replaced by a standing Committee for Inter-national Congresses as an integral part of the organization of the Union.l

The objects of the International Union of Theoretical and Applied Me-chanics are: a) To form a link between persons and national or international organizations

engaged in scientific work (theoretical or experimental) in mechanics or in related sciences;

b) To organize international congresses of theoretical and applied mechanics through a standing Congress Committee, and to organize other international

50 REPORT 197 1

meetings for subjects failing within the field of theoretical and applied mechanics 1; .

c) To engage in other activities meant to promot: development of mechamcs, both theoretical and applied, as a branch of sctence.

II The active organ of the International Union of Theoretical and Applied

Mechanics is its General Assembly. The General Assembly has power to decide ail questions affecting the

Union, including alteration of the statutes. On a specified question it may delegate this power to appropriate bodies. . .

The composition of the General Assembly is regulated m Article IV.

IIAt a) The General Assembly establishes a standing Congress Committee wh_ich

is responsible for the organization of international congresses of theoretical and applied mechanics at regular intervals. .

b) The president of the Union shaH also serve as prestdent of the Congress Committee. The members of the Congress Committee are appointed . by the General Assembly as scientists active in theoretical and applied mechamcs who need not be members of the General Assembly.

c) The Congress Committee appoints a secretary, without stated terms of office.

d) The rules of procedure of the Congress Committee shall be approved by the General Assembly.

III Organizations occupied in scientific work in or applied mechanics

(or national unions of such organizations) can by the General As-sembly as adhering organizations of the Internatwnal

Each adhering organization shall have representatives General sembly of the International Union, and pay an annual subswptwn to the Umon in accordance with Article IX.

L Modification approved by the General Assembly of September 2, 1964 in Munich and become effective from September 4, 1964.


III At

International organizations mainly occupied in scientific work in fields closely related to that of the Union can be admitted by the General Assembly as affiliated organizations of the International Union.

Each affiliated organization has the right to appoint an observer, who is invited to take part in the General Assembly without voting rights.

The affiliated organization is obliged to keep the Bureau (section VII) of the International Union informed about all important activities of and organi-zational measures taken by it. The affiliated organization will incorporate a representative appointed by the Bureau of the International Union in its scien-tific council or the corresponding organ.

In organizing international scientific meetings of its own the affiliated organization is obliged to consider carefully all measures already taken the International Union and its other affiliated organizations in order to coordmate such international scientific activities.

Affiliated organizations pay no annual dues to the International Union.

IV The General Assembly of the International Union of Theoretical and Ap-

plied Mechanics is composed of: a) Representatives of the organizations adhering to the Union; b) Members elected by the General Assembly of the Union, who shall be

persons actually engaged in scientific work in mechanics or in related sciences;

c) If so decided by the General Assembly, representatives of Committees. 2 The number of elected members of the General Assembly of the same

nationality in general should not exceed five. Exceptions can be made only by decision of the General Assembly. The term of each elected member shall be determinated by the General Assembly at the time of his election.

The General Assembly shall provide for adequate representation of countries where important research is carried out in theoretical or applied mechanics, but where a national organization does not yet exist.

t Add ition approved by the General Assembly of August 27, 1970 in Liege. 2 The General Assembly of September 2, 1964 in Munich has decided to admit as

Member of the General Assembly a representative of the standing Congress Committee of IUTAM (see article II A).

52 REPORT 197 1

v When voting is necessary every member of the General Assembly shall

dispose of one vote. Any member who may be unable to attend a meeting may by a letter to the secretary constitute another member of the General Assembly as his proxy.

For ordinary decisions and for elections a simple majority of the votes brought forward is required. For an alteration of the statutes the majority re-quired is 2/3 of the votes brought forward.

Between meetings of the General Assembly voting may be carried out by correspondence upon proposals made by the Bureau (section VII); in this case decisions will be valid only provided the number of persons taking part in the vote is not less than 2/3 of the total membership of the General Assembly.

VI Meetings of the General Assembly will take place at times decided by the

Bureau or on request of at least 10 members of the General Assembly.

VII In order to carry out work between the meetings of the General Assembly,

the latter appoints a Bureau, consisting of: A president, The retiring president, who shall serve as vice-president, A secretary, A treasurer, And four other members of the General Assembly. The members of the Bureau will be elected for a period of at most 4 years

and will be eligible for re-election. Newly elected members of the Bureau enter into office on the date of November 1st, following the General Assembly at which they have been elected.

The Bureau will meet at least every year. A member of the Bureau who is prevented from attending a meeting may by a letter to the secretary designate another member of the General Assembly to replace him.

The function of the secretary will be to act as a permanent center for matters affecting the Union, including relations with adhering or outside or-ganizations.

The legal domicile of the Union shall be the place where the secretary lives. The Bureau is authorized to appoint assistant-treasurers in those countries

where the Union has a bank account. The assistant-treasurers must be members of the General Assembly but need

not to be members of the Bureau.


VIII The financial means of the Union are formed by:

a) the annual subscriptions of the adhering organizations; b) gifts and grants.

The Union shall maintain a roll of benefactors on which shall be inscribed annually the names of those persons or institutions which have accorded gifts, legacies or other subventions to the Union.

The Bureau of the Union shall draft a budget for each coming year, and shall administrate the finances. The Bureau shall submit an annual f inancial report to the members of the General Assembly.

IX The number of representatives of an adhering organization and the amount

of the annual subscription to be paid by that organization will be regulated to one of the following categories, as proposed by the adhering or-

gamzatwn and after approval of the General Assembly of the Union:

Number of Units of Category representatives annual subscription 1

I 1 1 II 2 3

III 3 5 IV 4 8 v 5 12

The amount of the unit annual subscription will be U. S. $ 1001 or its equivalent in local currency at the date of payment.

X In all its decisions the General Assembly shall be guided by the tradition

of free _international scientific cooperation which has been developed in the International Congresses for Applied Mechanics.

XI The French text of the statutes (of which the above is a translation) shall

be considered to be the authoritative text.

1 Modification introduced after the vote of the General Assembly in Herrenalb (Ger-many), September 12th 1969.

54 REPORT 1971

Resolution of the General Assembly at Pallanza (June 27, 1950)

In confirmation of the views already expressed at the General Assembly of September 1948 when the present statutes were framed:

1. The General Assembly expects that in those countries where more than one national organization is active in theoretical and applied mechanics, a na-tional coordinating committee will be formed. In general it is expected to re-cognize only one adhering body in each country;

2. The General Assembly believes that a gradual transition should be made in its composition, so that ultimately it will consist mainly of representatives of organizations adhering to the Union with the category of elected members reserved for exceptional and unusual cases. To this end it gives notices of its intention to reduce the number of elected members when the terms of the present elected members expire in 1952.

Rules of procedure 1 for the Congress Committee of IUTAM (September 4, 1964)

1. The Congress Committee meets at least once at every Congress.

2. The Congress Committee may appoint an Executive Committee to take all necessary actions on its behalf in the period between two successive Con-gresses, and to report to it at its next meeting. The Executive Committee will consist of the president, the secretary and one or more members appointed by the Congress Committee.

3. The actual organization of a Congress is delegated to a local Organizing Committee, elected by the host-country or host-organization, which is also responsible for publication of its Proceedings. The Organizing Committee will report to the Congress Committee either during or, if it sees fit, before the Congress which it organizes.

4. The Organizing Committee will obtain the approval of the Congress Committee (normally through the Executive Committee) with regard to all matters affecting the general policy of the Congress Committee, in particular with regard to:

4.1 the scope of the Congress; 4.2 the screening of papers for the Congress; 4.3 the selection of general lectures for the Congress; 4.4 the appointment of chairmen of sessions of the Congress.

1 Rules adopted by the General Assembly of September 2, 1964 in Munich and become effective from September 4, 1964.


5. The Organizing Committee will levy a fee not exceeding $ 1 on behalf of. t.he Union of Theoretical and Applied Mechanics, for ad-mmtstratlve expenses, from all Congress members, in addition to the fee re-quired for the Congress itself. The additional fees will be paid over to IUT AM immediately after the Congress.

List of Publications

a) Annual Reports. Report 1948 Report 1949 Report 1950 Report 1951 Report 1952 Report 1953 Report 1954-1955- 1956 Report 1957 Report 1958 Report 1959 Report 1960 Report 1961 Report 1962 Report 1963 Report 1964 Report 1965 Report 1966 Report 1967 Report 1968 Report 1969 Report 1970 Report 1971

b) Publications on Symposia, etc.:

no more available

available at the Secretariat

1. of Cosmical Aerodynamics, Proceedings of the Symposium on the Motton of Gaseous Masses of Cosmical Dimensions held at Paris, France, August 16-19, 1949, organized by IUTAM and IAU.

by: Central Air Documents Office, Army-Navy-Air-Force, UB Butldmg, Dayton 2, Ohio, USA. Copies can be obtained from the Secretary, U.S. National Committee on Theoretical and Applied Mechanics, Room 1101, 29 West 39th Street, New York 18, N.Y., USA, and from the secretariat of the Intern. Astrono' mica! Union (address: University Observatory, 0ster Voldgade 3, Copen-hagen, Denmark).

56 REPORT 1971

2. Col/oque international de Mecanique, Pallanza, Lago Maggiore, Italia, 23-24 juin 1950, organise par l'IUTAM. Publie par le Consiglio Nazionale delle Ricerche, Roma, ltalia, dans " La Ricerca Scientifica", annee 20, n° 12, pp. 1917- 1942, dec 1950.

3. Col/oqrtium on Plastic Flow and Deformation within the Earth, Hershey, Pennsylvania, USA, September 12-14, 1950, organized by IUTAM and IUGG. Published by the American Geophysical Union in the "Transactions Amer-ican Geophysical vol. 32, n° 4, pp. 497- 543, 1951. A few copies can be obtained from the Secretary, American Geophysical Union, 1530, P. Street, N. W. , Washington, D. C. (USA).

4. Col/oqtte mr les Vibratiom Non-Lim?aires, tenu a l' ile de Porquerolles, Var, France, 18- 21 septembre 1951, organise par l'IUTAM et l'URSI. Publications scientifiques, n° 281, Ministere de r Air, 4, avenue de Ia Porte-d 'Issy, Paris XVc (France), 1953.

5. Colloque Ma.f.fau, tenu a Bruxelles, Belgique, les 25-29 avril 1952, organi-se par le Comite Massau, avec le concours de l'IUT AM. Association des Ingenieurs de Gand, rue de Ia Victoire, Bruxelles.

6. 2nd Symposium on Gas Dynamics of Interstellar Clouds, Cambridge (UK) , 1953, in cooperation with !AU. "Gas Dynamics of Cosmic Clouds, edited by H . C. van de Hulst and J. M. Burgers (IAU Symposium series, n° 2), Amsterdam". Published by North-Holland Publishing Company, Amsterdam (Nether-lands), 1953.

7. Colloquium on Photoelasticity and Photoplasticity (Brussels, Belgium, 29-31 July 1954). Published by Imprimerie Dioncre, Chaussee de Boondael, 602- 602a, Ixelles-Bruxelles (Belgique).

8. Colloquium on fatigue (Stockholm, Sweden, 25-27 May 1955), organized by IUTAM. Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmersdorf, West Berlin (Germany), 1956.

9. Colloquium on Deformation and Flow of Solfds (Madrid, Spain, 26-30 September 195 5), organized by IUT AM. Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmersdorf, West Berlin (Germany), 1956.

10. Third Symposium on Cosmical Gas Dynamics (Cambridge, Massachusetts, USA, 24-29 June 1957, in cooperation with IAU). Published by Reviews of Modern Physics, American Institute of Physics, 335 East 45th Street, New York 17, N.Y. (USA), 1958.


11. Sympositmz on Boundary Layer Research (Freiburg i. Br., Germany, 26-29 August 1957). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmersdorf, West Berlin (Germany), 1958.

12. International Symposi11m on Atmospheric Diffusion and Air Pollution (Oxford, UK, 24- 29 August 1958, in cooperation with IUGG). Published by Academic Press, Inc., 111 Fifth Ave., New York 3, N.Y. (USA) , 1959.

13. Symposi11m on Non-Homogeneity in Elasticity and Plasticity (Warsaw, Po-land, 2- 9 September 1958), organized by IUTAM. Published by Pergamom Press, Ltd., 4 & 5 Fitzroy Square, London W 1 (UK) , 1959.

14. Symposium on Fl!tid Mechanics in the Ionosphere (Ithaca, N.Y., USA, 9-15 July 1959), organized by URSI in cooperation with IUTAM, IUGG and IAU. Published by the American Geophysical Union, 1515 Massachusetts Avenue, N. W., Washington 5, D. C. (USA) , in the "Journal of Geophysical Re-search", Vol. 64 (Dec. 1959), pp. 2037-2041.

15. Symposium on the Theory of Thin Elastic Sheils (Delft, Netherlands, 24-28 August 1959) , organized by IUTAM. Published by the North-Holland Publishing Company, N. Z. Voorburgwal 68, Amsterdam-C. (Netherlands), 1960.

16. International Symposium on Magnetohydrodynamics (Washington, D. C. -Williamsburg, Virginia, USA, 17- 23 January 1960) . Published by Reviews of Modern Physics, American Institute of Physics, 335 East 45th Street, New York 17, N.Y. (USA).

17. Colloquimn on Creep in Strttclllres (Stanford, California, USA, 11- 15 July 1960). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmersdorf, West Berlin (Germany) , 1962.

18. Fo11rth Symposi11m on Cosmical Gas Dynamics (Varenna, Italy, 18-30 August 1960, in cooperation with IAU). Published by the Italian Physical Society, in the ''Supplemento del Nuovo Cimento", Vol. 22 n. 1, 1961.

19. l nternatio11al Symposium on F11ndamental Problems in Turb11lence and their Relation with Geophysics (Marseille, France, 4-9 September 1961, in co-operation with IUGG). Vol. 67, n° 7A (American Geophysical Union, 1515 Massachusetts Avenue, N. W., Washington 5, D . C., USA). Published in the "Journal of Geophysical Research", Vol. 67, N° 8 (July 1962) , pp. 3003-3235.

58 REPORT 1971

20. International Symposium on the Theory of Non-Linear Vibrations (Kiev, USSR, 12- 18 September 1961). Published by the Publishing House of Academy of Sciences of the Ukra-inian SSR in Kiev (USSR).

21./nternational Symposium on Second Order Effects in Elasticity, Plasticity and Fluid Dynamics (Haifa, Israel, 21-27 April 1962). Published by Pergamon Press, Ltd, Jerusalem Academic Press, Ltd, Israel, 1964.

22. Symposium sur Ia Dynamique des Satellites (Paris, France, 28- 30 mai 1962). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmersdorf, West Berlin (Germany), 1963.

23. Symposium on Gyrodynamics (Celerina, Switzerland, 20- 23 August 1962) . Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmersdorf, West Berlin (Germany), 1963.

24. Symposium Transsonicum (Aachen, Germany, 3- 7 September 1962). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmersdorf, West Berlin (Germany), 1964.

25. Symposium on Stress Waves in Anelastic Solids (Providence, Rhode Is-lands, USA, 3-5 April 1963). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmersdorf, W est Berlin (Germany) , 1964.

26. Symposium on Applications of the Theory of Functions in Continttttm M echanics (Tbilisi, USSR, 17-23 September 1963). Proceedings edited by N. I. Muskhelishvili, L. I. Sedov, and G. K. Mikhai-lov and published under the title " Applications of the Theory of Functions in Continuum Mechanics, Vol. 1 Mechanics of Solids, Vol. 2 Fluid and Gas Mechanics, Mathematical Methods" by "Nauka" Publishing House, Moscow (USSR) , 1965.

27. Symposium sur Ia Rheologie et Ia Mecanique des Sols (Grenoble, France, 1-8 avril 1964). Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmersdorf, West Berlin (Germany), 1966.

28. Symposium on Concentrated Vortex Motions in Fluids (Ann Arbor, Michi-gan, USA, 6- 11 July 1964). A brief account by D. Ki.ichemann of the problems discussed has been pub-lished in the "Journal of Fluid Mechanics", Vol. 21 , part 1, pp. 1- 20 (1965). The survey papers have been published in Vol. 7 of "Progress in Aeronautical Sciences", 1966.


29. Symposium on Recent Advances in Linear Vibration M echanics (Paris, France, 13-15 April 1965). Published in "Revue Franc;aise de Mecanique" under the title "Recents Pro-gees de Ia Mecanique des Vibrations Lineaires", N ° 13 (1965), pp. 3-58, N° 14 (1965), pp. 3-70, N° 15 ( 1965), pp. 3-105.

30.Joint JUT A M I !AU I COSPA R Symposium on the Trajectories of Artificial Celestial Bodies as Determined from Observation ( Paris, France, 20-30 April 1965) . Published by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmersdorf, West Berlin (Germany), 1966.

31. V th Joint !AU I IUTA M Symposium on Cosmical Gas Dynamics (Nice, France, 2-15 September 1965) . Published under the title "Aerodynamic Phenomena in Stellar Atmospheres" (IAU Symposium series, No. 28), editor R. N. Thomas. Academic Press, London and New York, 1967.

32./UT AM Symposium on Rotating F!ttid Systems ( La Jolla, California, USA, 28 March-1 April 1966). A Report on this Symposium has been published by F. P . Bretherton, G. F. Carrier, and M. S. Longuet-Higgins under the t itle "Report on the I.U.T .A.M. symposium on rotating fluid systems " in the "Journal of Fluid Mechanics", Vol. 26, part 2, pp. 393-410 ( 1966).

33. JUT AM Symposium on Irreversible Aspects of Contimmm Mechanics Vienna, Austria, 22- 25 June 1966). JUT AM Symposium on the T ransfer of Physical Characteristics in Moving Fluids (Vienna, Austria, 27-28 June 1966) . The Proceedings of both Symposia, edited by H. Parkus and L. I. Sedov, have been published in one volume under the title " Irreversible Aspects of Continuum Mechanics - Transfer of Physical Characteristics in Moving Fluids" by Springer-Verlag, Vienna and New York, 1968.

34. Joint IUGG I JUT A M SympositJm on B oundary Layers and In-clllding Geophysical Applications (Kyoto, Japan, 19-24 September 1966). The Proceedings of the Symposium, edited by F. K. Bowden, F. N. Fren· kiel, and I. Tani have been published in "The Physics of Fluids, Supple-ment 1967", Vol. 10, 9, Part II, pp. 3- 321 (1 967) .

35 . I U TA M Symposium on the Generalized Cosserat Contimmm and the Continmon Theory of Dislocations with A pplications (Stuttgart and Freu-denstadt, Germany, 28 August-2 September 1967) . The Proceedings of the Symposium, edited by E. Kroner, have been published by Springer-Verlag, Berlin 1968.

60 REPORT 1971

36. Second I UTA M Symposium on the Theory of Thin Shells (Copenhagen, Denmark, 5-9 September 1967). The Proceedings of the Symposium, edited by F. I. Niordson have been published by Springer-Verlag, Berlin 1969.

3 7. I UTA M Symposium on the Behavioftl' of Dense j\1edia under High Dynamic Pressures (Paris, France, 11- 15 September 1967). . The Proceedings of the Symposium, edited by J. Berger, have been published by Dunod, Paris, 1968.

38. JUT AM Symposittm on Thermoinelasticity (East Kilbride, Glasgow, UK, 26-28 June, 1968). The Proceedings, edited by B. A. Boley, have been published by Springer-Verlag, Vienna and New York, 1970.

39. I UTA M Symposi1111t on High-Speed Comp11ting in FLuid Dynamics (Monterey, Cal., USA, 18-24 August, 1968). The Proceedings, edited by F. N. Frenkiel and Keith Stewartson, have been published in the Journal "The Physics of Fluids", Supplement II , Volume 129, No. 12, Part II (1969).

40. I UTA M Symposium on the Flow of FLuid Solid Mixtures (University of Cambridge, UK, March 24-29, 1969). An account of the scientific developments reported at this Symposium is published in the "Journal of Fluid Mechanics", ( 1969), vol. 39, part 2, pp. 375-405.

/tl.joiut / UTAi\1 ,' /UPAP Symposi11111 011 Electrobydrodynamics (MIT, Cambridge, USA, March 31-April 2, 1969) . A collection of extended abstracts has been assembled and review article by J. R. Melcher has been published in the "Journal of Fluid Mechanics" (1970), vol. 40, part 3, pp. 641-655.

42 . 1 UTA AI Sympo.1i11111 on lmtability of Continuo11s Systems (Karlsruhe, Germany, September 8-12, 1969). The Proceedings of the Symposium edited by S. F. J. Broer and H. Leipholz have been published by Springer-Verlag, Berlin 1971.

43. Vlth Joint IA UJ! UT AM Symposi11m on Cosmical Ga.r Dynamics (Crimean Astrophysical Observatory, USSR, September 8- 19, 1969).

The Proceedings, edited by Dr. Habing, have been published under the title "Interstellar Gas Dynamics" by D. Reidel Publishing Company, Dordrecht · Holland, 1970.

44. Joint COSPAR f !AU J IUGG l JUT AM SJ•mposittm on the Dynamics of Satellites (Prague, Czechoslovakia, May 20- 24, The Proceedings of the Symposium edited by M. B. Morandu have been published by Springer-Verlag, Berlin 1970.


45. Second JUT AM Symposimn on Creep in Stmctures (Gothenburg, Sweden, August 17- 21, 1970). The Proceedings of the Symposium edited by J . Hult have been published by Springer-Verlag, Berlin.

46. JUT AM Symposium on High-Speed Computing of ELastic Structures (Liege, Belgium, August 23-28, 1970). The Proceedings of the Symposium edited by B. Fraeijs de Veubeke have been published by Universite de Liege, 1971.

47. lUT AM Symposium on Unsteady Boundary Layers (Quebec, Canada, May 24-28, 1971) 0

The Proceedings are published by Les Presses de l'Universite Laval, C. P. 2447, Quebec 2, Canada.

(Please note: The publications listed above, except the Annual Reports, are not available at the I UTA M Secretariat. Please order directly from the publisher.)

c) Proceedings of the International Congresses for Applied Mechanics.

Until September 4, 1964 the organization of the International Congresses f.or Applied Mechanics was supervised by the "International Committee for the Congresses of Applied Mechanics" and for each Congress separately entrust-ed to a local Organizing Committee undertaking also the publication of the Pro-ceedings. Consequently, there is no central point from which Proceedings can be ordered, and for each volume, application must be made to the publishers who took care of that particular volume.

Since September 4, 1964 the same task will be fulfilled by the Standing Congress Committee of IUT AM, and local Organizing Committees to be established.

The titles of the volumes and the names of the publishing firms are given below.

1st Congress, Delft (Netherlands), 22-26 April 1924. Proceedings of the First International Congress for Applied Mechanics, Delft 1924, edited by C. B. Biezeno and J .-M. Burgers (one vol.). Tech-nische Boekhandel en Drukkerij J. Waltman Jr. , Delft, 1925. No more copies are available for sale at Delft.

62 REPORT 1971

2nd Congre.rs, Zi.irich (Switzerland) , 12- 17 September 1926. Verhandlungen - Comptes rendus - Proceedings of the 2nd International Congress for Applied Mechanics, Zurich, 12- 17 September 1926, heraus-gegeben von E. Meissner (one vol.). Ore II Fussli Verlag, Zurich und Leipzig, 1927.

Jrd Congrer.r. Stockholm (Sweden), 24-29 August 1930. Verhandlungen - Proceedings of the 3rd International Congress for Ap-plied Mechanics - Comptes rendus, herausgegeben von A. C. W . Oseen und W. Weibull (:'>. vol.). AB. Sveriges Litografiska Tryckerier, Stockholm, 1931.

4th Congresr, Cambridge (UK) , 3-9 July 1934. Proceedings of the Fourth International Congress for Applied Mechanics, Cambridge, UK, July 3rd-9th, 1934 (one vol.). University Press, Cam-bridge (UK), 1935.

5th Congress, Cambridge (Massachusetts, USA), 12-16 September 1938. Proceedings of the Fifth International Congress for Applied Mechanics, held at Harvard University and the Massachusetts Institute of Technology, Cambridge, Massachusetts, September 12-16, 1938, edited by J. P. den Hartog and H. Peters (one vol.). John Wiley and Sons, Inc., New York (USA), and Chapman and Hall Ltd, London (UK), 1939.

6th Congress, Paris (France), 22-29 September 1946. Proceedings not published (was given in the hands of Gauthier-Villars, Paris).

7th Congress, London (UK), 5-11 September 1948. Proceedings of the Seventh International Congress for Applied Mechanics, 1948, published by the Organizing Committee (Introduction, Vol. I, Vol. II- Parts I and 2, Vol. III, Vol. IV). Copies can be obtained on application from the Secretary of the Congress Committee, Prof. W. T. Koiter, Mekelweg 2, Delft (Netherlands).

8th Congress, Istanbul (Turkey), 20-28 August 1952. Proceedings published by the Organizing Committee (Vol. I, Vol. II). Faculty of Sciences, University of Istanbul, P. 0. Box 245, Istanbul (Tur-key), 1953. Copies can be obtained on application from the Secretary of the Congress Committee, Prof. W. T. Koiter, Mekelweg 2, Delft (Netherlands).

9th Congress, Brussels (Belgium), 5-13 September 1956. Proceedings published by the Organizing Committee (Vol. I to Vol. VIII) . Free University of Brussels, 50, avenue Franklin-Roosevelt, Brussels (Bel-gium), 1957.


lOth Congress, Stresa (Italy), 31 August-7 September 1960. Proceedings published by the Consiglio Nazionale delle Ricerche, Piazelle delle Science 7, Roma (ltalia), printed by Elzevier Publishing Company, Amsterdam- New York, 1962.

lith Congress, Munich (Germany), 30 August-5 September 1964. Proceedings edited by H. Gertler and published by Springer-Verlag, Hei-delberger Platz 3, Berlin-Wilmersdorf, West Berlin (Germany), 1966.

12thCongress, Stanford, Cal. (USA), 26- 31 August 1968. The Proceedings, edited by M. Hetenyi and W. G. Vincenti, have been published by Springer-Verlag, Berlin (Germany), 1969.

64 REPORT 1971

List of Addresses

Ackeret, Prof. J., Eidgenossische Technische Hochschule, Sonneggstrasse 3, 8006 Zurich, Switzerland.

de Arantes e Oliveira, Prof. E. R., Lab. Nacional de Engenharia Civil, Av. do Brasil, Lisboa, Portugal.

Batchelor, Prof. G. K. , Dept. of Applied Mathematics and Theorical Physics, University of Cambridge, Silver Street, Cambridge, UK.

Becker, Prof. E., Technische Hochschule Darmstadt, 61 Darmstadt, Germany. Berndt, Prof. S., The Royal Institute of Technology, Stockholm 70, Sweden. Bhatnagar, Prof. P . L., Vice-Chancellor, Rajasthan University, Jaipui, India. Bishop, Prof. R. E. D., Dept. of Mechanical Engineering, University College

London, Gower Street, London WC 1, UK. Blackwell, Dr. J. H ., Department of Applied Mathematics, University of

Western Ontario, London, Ontario, Canada. Brankow, Prof. G., Bulgarian Academy of Sciences, ul. "7 noemvri" 1, BG

Sofia, Bulgaria. Buckens, Prof. F., 3, av. des Hetres, Heverle-Louvain, Belgium. Burgers, Prof. J. M. , Institute for Fluid Dynamics, University of Maryland,

College Park, Maryland 20742, USA.

Calvo, Sr. R., Presidente del INT A, Calle Serrano 43, Madrid, Spain. Carafolie, Prof. E., Institut de Mecanique Appliquee, 15. rue Const. Mille,

Bucarest, Rumain.

Dolapchiev, Prof. B., 36 Tzar Krum Str., Sofia, Bulgaria. Drucker, Prof. D. C., College of Engineering, University of Illinois, Urbana,

Ill. 61801, USA.

Engelund, Prof. F. , The Technical U niversity of Denmark, lost. of Hydro-dynamics and Hydraulic Engineering, Building 115 B, 2800 Lyngby, Den-mark.

Ferrari, Prof. C. , Inst. di Mecc. Appl. , Politecnim di Torino, C. 50 Duca Degli Arbruzzi 24, 10129 Torino, Italy.

Fiszdon, Prof. W., Polish .Academy of Sciences, Palac Kultury i Nauki, p. 2606, Warszawa, Poland.

Fraeijs de Veubeke, Prof. B., University of Liege, 75, Rue de Val Benoit, Liege, Belgium.

Frenkiel, Dr. F. N. , Computation and Mathematics Department, Naval Ship Research and Development Center, Bethesda, Maryland 20034, USA.

Gauthier, Prof. L., 14, rue du Lycee, Sceaux (92), France. Germain, Dr. P ., 3, Avenue de Champaubert, Paris XV•, France. Glockner, Prof. P. G., Department of Civil Engineering, University of Calgary,

Calgary 44, Alberta, Canada.

I INTERNATIONAL UNION OF THEORETICAL AND APPLIED MECHANICS 65

Goldstein, Prof. S., Pierce Hall, Harvard University, Cambridge Mass. 02138, USA.

Gradowczyk, Dr. M ., Comision Nacional de Energia Atomica, Ave del Liber-tador 8250, Buenos Aires (29), Argentina.

Gortler, Prof. H., 78 Freiburg i Br., Hebelstrasse 40, Germany.

Hinze, Prof. J. 0., Rotterdamsweg 145, Delft, Netherlands. Hoff, Prof. N. J., Dept. of Aeronautics, Stanford University, Stanford, Cali-

fornia 94305, USA. Hult, Prof. J. , Chalmers Tekniska H ogskola, G ibraltargatan 5 M, 40220 Gate-

borg 5, Sweden.

Ilyushin, Prof. A. A., Dept. of Mechanics and Mathematics, University of Moscow, Moscow B-234, USSR.

Jmai , Prof. I., Dept. of Physics, University of Tokyo, Hongo, Bunkyo-ku, To-kyo, Japan.

Janssens, Prof. P., !'University Libre de Bruxelles, Bruxelles, Belgium. }er ie, Prof. J., Komornicka 27, Praha 6, CSSR.

Keffer, Dr. ]. F., D ept. of Mechanical Engineering, University of Toronto, Toronto, Ontario, Canada.

Koiter, Prof. W. T., Technische Hogeschool Delft, Mekelweg 2, Delft, Hol-land.

Kozesnik , Prof. ]., Bureau of the President of the Czechoslovak Academy of Sciences, Narodni tr. 3, Praha 1, CSSR.

Ku, Prof. Y. H., University of Pennsylvania, 200 S 33rd Street, Philadelphia 4, Penn. 19104, USA.

Kuhelj , Prof. A., Institute of Mechanics, Lepi Pot 13, Ljubljana, Yugoslavia.

Lee, Prof. E. H. , Dept. of Applied Mechanics, Stanford University, Stanford, California 94305, USA.

Legendre, Dr. R. , 17, rue Massenet, Paris XVI•, France. LighthiJJ, Sir M. ]., Dept. of Applied Mathematics and T heoretical Physics,

The University of Cambridge, Silver Street, Cambridge, UK.

Maunder, Prof. L., University of Newcastle upon Tyne, Stephenson Building, Claremont Road, Newcastle upon Tyne, NE1 7RU, UK.

Mettler, Prof. E., 75 Karlsruhe-Durlach, Geigerbergstrasse 12, Germany. Muskhelishvili, Prof. N. 1., Georgian Academy of Sciences, ul. Dzerjinskii 8,

Tbilisi, USSR.

N ikolskii, Prof. A. A., Computing Center of the USSR Academy of Sciences, ul. Vavilova 28, Moscow B-333, USSR.

Niordson, Prof. F. 1., Dept. of Solid Mechanics, The Technical Univers ity of Denmark, Building 404, 2800 Lyngby, Denmark.

66 REPORT 1971

Nowacki, Prof. W., Polish Academy of Sciences, Warszawa, Palac Kultury i Nauki, Poland.

Odqvist, Prof. F. K. G., Torstenssonsvagen 7 D, S-18264 Djursholm, Sweden. Olszak, Prof. W., Int. Centre for Mechanical Sciences, Udine, Palazzo del Torso,

Italy. Owen, Prof. P.R., Imperial College of Science and Technology, Dept. of Aero-

nautic, Prince Consort Road, London SW7 2BY, UK. Palm, Prof. E., University of Oslo, Blindern, Oslo 3, Norway. Parkus, Prof. H., Technische Hochschule Wien, Karlplatz 13, A-1040 Wien,

Austria. de Pater, Prof. C., T. H. T. Postbox 217, Enschede, Netherlands. Peste!, Prof. E., 3 Hannover, Borkumer Str. 45, Germany. Perez-Marin, Sr. A., Director General del INTA, Calle Serrano 43, Madrid,

Spain. Prager, Prof. W., Division of Engineering, Brown University, Providence, R.I.

02912, USA. Radok, Prof, J. R. M., Australian Academy of Science, Gordon Street, Canberra

City, Australian Capital Terretory, Australia. Ranta, Prof. Matti A., Helsinki University of Technology, 02150 Otaniemi,

Finland. Reiner, Prof. M., Technion, Haifa, P. 0. 4910, Israel. Rimrott, Dr. F. P. J., University of Toronto, Toronto 5, Ontario, Canada. Rott, Prof. N., Eidgenossische Technische Hochschule, Sonneggstrasse 3, 8006

Zi.irich, Switzerland. Roy, Prof. M., 55. Boulevard Malesherbes, Paris VIII•, France. Rubinowicz, Prof. W., Hoza 74{4, Warszawa, Poland. Salyi, Prof. 1., Technical University of Miskolc, Miskolc, Hungaria. Sedov, Prof. L. 1., University of Moscow, Zone U, app. 84, Moscow B-234,

USSR. Sobrero, Prof. L., Secretary General of CISM, Udine Palazzo del Torso, Italy. Sokolovskii, Prof. V. V., Institute of Mechanics of the USSR, Academy of

Sciences, Leningradskii prospekt 7, Moscow A-40, USSR. Supino, Prof. Giulio, AI MET A, Inst. di Idraulica, Univ. di Bologna, Viale

Risorgimento 2, 40136 Bologna, Italy. Tani, Prof. I., Dept. of Mechanical Engineering, Nohon University, Kanda-

Serugadai, Chiyoda-ku, Tokyo, Japan. Taylor, Sir G., Farmfield, Huntingdon Road, Cambridge, UK. Temple, Prof. G., 341 Woodstock Rd., Oxford, England. Weibull, Prof. W., Bockamollan, Brosarps Station, Sweden. Yoshiki, Prof. M., Japan Society for the Promotion of Sciences, 1-1 Kanda-

hototsubashi, Chiyoda-ku, Tokyo, Japan. Ziegler, Prof. H., Weiherweg 6, 8803 Ruschlikon, Switzerland.

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