Proceedings of

m con a /MEDITERRANEAN ELECTROTECHNICAL CONFERENCE

34 CONGRESS ON ELECTRONICSJOINT CONFERENCE r

/ >Sponsored by:

IEEE (The Institute of Electrical and Electronics Engineers, Inc.)IEEE Region 8IEEE Middle and South Italy SectionRIENA (International Electronics, Energy and Space Exposition)

Co-sponsored by:

Italian Ministry of Posts and TelecommunicationsUniversity of Rome «La Sapienza»University of Rome «Tor Vergata»

Supported by:

Italian Ministry of Foreign AffairsCNR (National Research Council)ENEA (Italian Commission for Nuclear and Alternative Energy Sources)ENEL (National Electrical Energy Authority)AEI (Italian Electrotechnical and Electronics Association)ALITALIAFATMEITALCABLEITALTELSELENIASTETTELESPAZIO

UNIVERSITATSBtBUOT*£KHANNOVER

TECHMISCHEINFORMATION^.: 'BUGWSK

TOR Yf'RGAU

The Steering Committee would like to thank the two co-sponsors, University of Rome «La Sapienza» and University ofRome «Tor Vergata», for their generous contribution towards

the printing of this volume.

CONTENTS

Keynote introductory lectures by:

— Prof. A. M. Angelini, ENEL (Italy)— Prof. A. Kiindig, Zurich Polytechnic (Switzerland)— Ing. R. Panella, Ministry PTT (Italy)

Al. SPACE COMMUNICATION SYSTEMS

Chairman: G. Tartara (Italy)

Al.1.1 Developments in satellite communication systems (invitedpaper) 1S. Tirro (Italy)

Al.1.2 The design, development and testing of a businesscommunications earth station for the EUTELSAT satellitemultiservice system 7/. Aurinsalo (Finland)

A 1.1.3 A SS-TDMA telecommunication system for a smallcountry: the ITALSAT programme 11F. Marconicchio, G. Morelli (Italy)

Al.1.4 Possible Euro-African cooperation in the field ofregional/domestic telecommunication satellite systems 17A. Pinglier (ESA)

Chairman: G. Berretta (ESA)

Al.2.1 On-board regeneration in multicarrier user-oriented satellitesystems 235. Bellini, C. Molinari, G. Tartara (Italy)

Al.2.2 New developments in techniques to analyse the passage ofmulticarrier digital signals through nonlinear microwaveand millimetre amplifiers 27M.O'Droma (Ireland)

Al.2.3 The calculation of atmospheric microwave fluctuations bya dielectric equivalent 31A. Vander Vorst, D. Vanhoenacker (Belgium)

Al.2.4 Performance evaluation of satellite digital communicationsystems under intense amplitude scintillations 35U. Merlo0, S. Kosmopoulos00 ("Italy °°Greece)

* Full text of paper was not available in time for printing.

XI

A2. SWITCHING SYSTEMS

Chairman: S. Mercuri (Italy)

A2.1.1 How to select switching techniques for broadbandnetworks? (invited paper) 39H. Seguin, C. Duret, L. Etesse (France)

A2.1.2 Development of a high performance and compact packetswitching equipment for international public and/orprivate network 43H. Ohmura, T. Maekawa, K. Minakuchi (Japan)

A2.1.3 The principles of the software organization in the digitalswitching system DKTS 47P. Borojevic, S. Matic, M. Miletic, P. Dakovic (Yugoslavia)

Chairman: A. Roveri (Italy)

A2.2.1 An implementation of CCITT No. 6 signalling system ona SPC international exchange 53G.C. Cecchetta, M. Ciappina, S. Lodato (Italy)

A2.2.2 Fault location in analog and digital circuits and itsapplication to electronic exchange boards 59A.E. Salama (Egypt)

A2.2.3 Application of the PPL-method for the calculations of lossin PCM link systems 63/. Kubasik (Poland)

A2.2.4 Traffic analysis and simulation of a digital switching centrewith T-T architecture 67L.M. Tralhao, J. Craveirinha, P. Nordeste, J. Climaco(Portugal)

A3. OPTICAL FIBER AND COAXIAL CABLE SYSTEMS

Chairman: H. Seguin (France)

A3.1.1 The development of the Italian long-distance fiber opticcable network (invited paper) 71G. Gratta (Italy)

A3.1.2 The development of the Irish telecommunications networkusing optical fibre cables *79J.M. Dwyer (Ireland)

A3.1.3 Broadband optical distribution network: an approach tocost reduction 81M. De Bortoli, A. Moncalvo (Italy)

A3.1.4 First results in circuit and system design for an opticalfiber link at 2.3 Gbit/s 85S. Candeo, P. Moro, G. Tronca (Italy)

Chairman: P. de Ferra (Italy)

A3.2.1 F.O. systems for advanced telecommunication networks 89F. Bocchieri, M. Tamburello (Italy)

A3.2.2 Digital transmission on coaxial and optical cables of a 140mbit/s PCM-TV signal 93V. Pasquini, C. Cambareri, G. Zambelli, G. Marchini (Italy)

A3.2.3 On the bit-rate-repeater spacing product for optical fibercommunication systems 97F.Z. El-Halafawy, A.A.O. Attia, A.K.A. Saleh (Egypt)

A3.2.4 Digital transmission systems in presence of ISI, Gaussianinterference and an additive mixture of highly impulsiveand burst noise 103L. Panico (Italy)

A3.2.5 Application and experiences of an optomechanical switchfor multimode fibres 109A. Fagotti, R. Ravaglia (Italy)

A4. TERRESTRIAL RADIO SYSTEMS

Chairman: S.O. Ohrvick (Sweden)

A4.1.1 A survey of terrestrial millemeter-wave radio systems forcommercial users (invited paper) •H.H. Meinel (West Germany)

A4.1.2 A new answer to cost and performance problems for lowand medium capacity digital radio 121P. Vicini. R. Macchi (Italy)

A4.1.3 Evaluation of constant-envelope modulation: performancedegradation due to band-limited filtering 125G. Benelli, V. Cappellini, E. Del Re, R. Fantacd (Italy)

A4.1.4 A generalized Encap-4N modulation technique for digitalradio 129A. Gusmao, N. Esteves (Portugal)

A4.1.5 TMS 32010 implementation of an improved kineplex typeHF modem 135J.M. Perl, M. Aharoni (Israel)

Chairman: B. Catania (Italy)

A4.2.1 Adaptive correlation diversity for wideband TDMA mobileradio 141W.H. Lam, R. Steele (Great Britain)

A4.2.2 Mobile radiocommunication in tunnels 145P. Degauque, S. Kyheng, B. Demoulin (France)

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A4.2.3 A new method for the narrow-band interference rejectionin the direct sequence spread-spectrum systems usingtransversal filters 149Z.D. Stojanovic, M.L. Dukic, I.S. Stojanovic (Yugoslavia)

A4.2.4 CPM direct sequence spread spectrum carrier modulationusing noncoherent demodulation 153Z.Z. Zvonar, M. Dj. Kovacevic (Yugoslavia)

A4.2.5 All digital signal processing in a spread spectrumcommunication system 157M.K. Sust, M. Kowatsch (Austria)

Chairman: N.K. Uzunoglu (Greece)

A4.3.1 Observed deep fading in a coastal-desert area and the 163performance of space diversityS.E. El-Khamy, S.A. Matbouly (Saudi Arabia)

A4.3.2 Computational diversity versus conventional diversity forradio frequency channels 167AM. El-Sherbini, A. Abou-El-Magd (Egypt)

A4.3.3 Accurate estimation of the rain attenuation and thethermal noise in a multi-link microwave system 171/. Kanellopoulos, C. Capsalis, N. Kolliopoulos (Greece)

A4.3.4 Automatic real-time HF signal classification 175P.M. Petrovic, Z.B. Krsmanovic, N.K. Remenski (Yugoslavia)

A4.3.5 Computer-aided calculation of the effect of correctionterrain factors and its usage in determination of coveragearea 179S.B. Rasajski, Z.R. Petrovic (Yugoslavia)

Bl. LAN PERFORMANCE EVALUATION

Chairman: E.N. Protonotarios (Greece)

B 1.1.1 Local area networks: state of the art and trends (invitedpaper) *183K. Kuemmerle (Switzerland)

Bl.1.2 Performance of 1-persistent multichannel CSMA/CDprotocols ~ 185M. Ajmone Marsan, R. Drogo De Iacovo (Italy)

Bl.1.3 Protocols for broadband local area networks 189G.K. Kehagias, E.D. Sykas, E.N. Protonotarios (Greece)

Chairman: K. Kuemmerle (Switzerland)

B 1.2.1 Packet time delay in a variable frame voice and datamultiplex structure 195R.C. Kanyangarara (Zimbabwe)

B 1.2.2 Stochastic analysis of data, voice and video packet channels 199V.J. Sgardoni, M.E. Anagnostou, E.N. Protonotarios (Greece)

B 1.2.3 CSMA/CD-compatible protocols to support realtime voicetransmission 203L. Fratta°, C. Szabo°° ("Italy °°Hungary)

Bl.2.4 A proposal of basic communication services on Ethernetbased on the Fiore project LAN's, using the TPC/IP andX.25 protocol 207P. Boscolo, A. Bonanni, F. Pirri, A. Ferravante, M.Guarducci (Italy)

B2. IMPLEMENTATION AND APPLICATION OFCOMPUTER NETWORKS

Chairman: L. Fratta (Italy)

B2.1.1 LAN's for industrial applications (invited paper) *211H. Meyr (West Germany)

B2.1.2 Accessing protocols for hierarchical metropolitan area cablenetworks 213E.M. Carrapatoso, P.A. Watson (Great Britain)

B2.1.3 A carrier sense synchronous access protocol with dynamicscheduling for LAN based distributed PBX architecture 217/. Dunlop, M.A. Rashid (Great Britain)

B2.1.4 Modelling the parallel execution of large matrix operationson a locally distributed computing system 221A. Stafylopatis (Greece)

B2.1.5 An integrated patient record system using a local areanetwork 225M.J. Taylor, W.A. Corbett, J.R. Coughlan, R. Shields (GreatBritain)

B2.1.6 Multifont arabic numerals text reader using digital learningnetworks 229M.H. Al-Muifraje (Iraq)

B3. DESIGN AND PLANNING OF INTEGRATEDSERVICES NETWORKS

Chairman: K.E. Drangeid (Switzerland)

B3.1.1 Special services networks and ISDN (invited paper) *235M. Decina (Italy)

B3.1.2 The EFTPOS-system in Germany *237E. Samens (West Germany)

B3.1.3 Discrete capacity assignment algorithms 239F. Pavlidou, S. Kouris (Greece)

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B3.1.4 A Class 4 transport protocol implementation in modula-2 243E. Vazquez, M.A. Jodra, J.M. Lizaso, }. Quemada (Spain)

B3.1.5 A simplified method to convoy an asynchronous datachannel into a digital bearer 247L. Bellato, G.L. Cariolaro (Italy)

B3.1.6 The LSP method for evaluation and selection of computerand communication equipment 251/./. Dujmovic (Yugoslavia)

B4. MULTISERVICE NETWORKS

Chairman: A. Segall (Israel)

B4.1.1 EARN/BITNET world-wide academic and researchnetwork (invited paper) 255D. Lord (CERN)

B4.1.2 An integrated services broad-band network for institutionalusers: the BIL project 259P. Bellomo, F. Davoli, P.L. Portunato (Italy)

B4.1.3 Bandwidth and buffer allocation for multirate signals 265A.S. Drigas, E.N. Protonotarios, G.I. Stassinopoulos, E.D.Sykas (Greece)

B4.1.4 Using hypercube techniques as multi-channelcommunication networks 271Y. Maryanka (Israel)

B4.1.5 An experimental integrated multiservice LAN 275G. Audisio, F. Ferrero, L. Grossi, P. Marchisio (Italy)

Cl. MICROELECTRONIC CIRCUITS AND DEVICES

Chairman: F. Giannini (Italy)

C 1.1.1 Design methodologies for application specific in integratedcircuits (invited paper) 729A. Sangiovanni Vincentelli (USA)

Cl.1.2 Circuit simulation of MOS digital circuits 281L.F. Pederneira, J.P.C. Teixeira (Portugal)

Cl.1.3 INTCOM - An expert system for compaction of IC layouts 285M.R.P. Silva, M.J.A. Lanca (Portugal)

Cl.1.4 Semicustom circuits in telecommunication: past experienceand future needs 289P. Danklutti, S. Cucchi, L Pogliani (Italy)

Cl.1.5 Application of Bi for LPE deposition of GaAs layers fromGa-As-Bi solution 293M. Rattiszek, M. Panek, M. Tlaczala (Poland)

Chairman: F. Califano (Italy)

Cl.2.1 High efficiency GaAlAs red LED's (660 nm) with singleand double heterostructure 297J.M. Herrero°, F. Sandoval", A. Bensoussan00, I. Izpura°, B.Jimenez0 ("Spain °"France)

C 1.2.2 Hg,.xCdxTe avalanche photodiodes for the detection atX =1.3(1 m and 1.5 {Am 301R. Alabedra, B. Orsal, G. Lecoy, M. Valenza (France)

C 1.2.3 Acoustoelectric interaction in bulk multilayeredsemiconductor 305F. Palma, G. de Cesare, M. Narzisi (Italy)

Cl.2.4 Analysis of SC real networks 309B. Lopez Rojo, W. Warzanskyj Poliscuk (Spain)

Cl.2.5 Broad-band design of class E power amplifiers 315P.R.B. Vitor, J. Costa Freire (Portugal)

C 1.2.6 Real frequency broadband microwave matching using amodified Marquardt optimization 319A. Perennec, P. Jarry (France)

Cl.2.7 A generalised design procedure for MQF 323R. Lojacono, G.C. Cardarilli, S. Sacchetta (Italy)

C2. RADIO FREQUENCY TECHNOLOGIES

Chairman: F. Fedi (Italy)

C2.1.1 Recent advances in quasi-optical planar structures (invitedpaper) 331T. Itoh (USA)

C2.1.2 Computer-aided design of X-band microstrip Butler matrix 3332. Ratkovic, A. Marincic, Z. Petrovic (Yugoslavia)

C2.1.3 Microwave mixers analysis based on Spice 2 337M. Joao Rosario, J. Costa Freire (Portugal)

C2.1.4 Design of microwave FET oscillators with feedback 341/. Mlakar, D. Kostevc, J. Majcen (Yugoslavia)

C2.1.5 Describing functions of entrained oscillators 345A.H. Yahia, N.M. Shaalan, T.M. Nazmy (Egypt)

Chairman: E. Nano (Italy)

C2.2.1 Evanescent-mode bandpass waveguide filter for millimeterwaves 349F. Giannini, M. Salerno, R. Sorrentino, M. Tibaldi (Italy)

C2.2.2 Design of capacitive-gap suspended substrate stripline filters 353P. Jarry, Lo Hine Tong, G. Menexiadis (France)

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C2.2.3 Analysis and design of branch-guide directional couplersfor communication satellite antennas 357F. Alessandri, G. Bartolucci, R. Flamini, F. Rispoli, R.Sorrentino (Italy)

C2.2.4 Application of harmonic injection dividers to frequencysynthesizers in millimeter band 361/. Perez, P. Dorta, A. Trueba, F. Sierra Diaz (Spain)

C2.2.5 Analysis of the transient response of microwave power-pulsed amplifier with bipolar transistors 365/./. Alonso, F. Perez (Spain)

C2.2.6 Studies on Cr-Cu-Ni-Au (CCNA) metallization and itscompatibility with microwave integrated circuits (MICS)for space programme *369D. Balasubrahmanyam, O.P. Kaushik (India)

C3. DIGITAL SIGNAL PROCESSING

Chairman: A.G. Constantinides (Great Britain)

C3.1.1 Design and realization of two-dimensional digital filters(invited paper) 371A.N. Venetsanopoulos (Canada)

C3.1.2 VLSI realization of a fast multiplier in finite arithmetic 377G.C. Cardarilli, R. Lojacono, G. Martinelli, M. Salerno, S.Sacchetta (Italy)

C3.1.3 Bit-parallel VLSI implementations of recursive digital filters 381C. Caraiscos", B. Liu"" ("Greece °°USA)

C3.1.4 A 2D-FFT processor in 3(im CMOS technology 385B. Castagnolo, F. Corsi, V. Di Lecce, P. Larizza, D.Lunanuova (Italy)

Chairman: M. Medeiros Silva (Portugal)

C3.2.1 New techniques for fast accurate correlation estimation 389R. Cusani, G. Jacovitti (Italy)

C3.2.2 Numerical considerations for high resolution parametricspectral estimation 393E. Fogel (Israel)

C3.2.3 Adaptive least square approximation of signals 397R. Leonardi (Switzerland)

C3.2.4 Improvement of the efficiency in new deconvolutionsystolic architectures 401/./. Navarro-Guerrero, V. Casares-Giner (Spain)

Chairman: A.N. Venetsanopoulos (Canada)

C3.3.1 A cellular approach to the hardware realization of IIRRand FIR digital filters 4055./. Varoufakis (Greece)

C3.3.2 Testing of bussed cellular arrays: a case study on PLA 409V. Piuri, D. Sciuto (Italy)

C3.3.3 Functional fault simulation 415P.M.B. Veiga (Portugal)

C3.3.4. Quantized radar video signal on nonparametric rankdetector performance 419J.L. Sanz-Gonzalez (Spain)

C3.3.5 Decomposition of radar signal by digital inverse filter 423Jafar Wadi Abdul Soda, Sattar Bader Sedkhan (Iraq)

Chairman: A.R. Figueiras Vidal (Spain)

C3.4.1 Non-linear filters for image processing 429R. Ding", A.N. Venetsanopoulos00 ("P.R. China ""Canada)

C3.4.2 A novel general class of nonlinear filters for imageprocessing 433/. Pitas0, A.N. Venetsanopoulos"0 ("Greece ""Canada)

C3.4.3 Digital image analysis based on a two-dimensional slowlyvarying source model 437D.K. Mitrakos (Greece)

C3.4.4 Production of thermal images by processing of radiometricsignals 441M. Mongiando, F. Bardati, D. Solimini, P. Tognolatti (Italy)

C3.4.5 A fast digital DPCM codec for TV signals with expandeddynamic range 445A. Andreatos (Italy)

C4. PROTOCOLS FOR COMMUNICATION

Chairman: G. Carayannis (Greece)

C4.1.1 Design environment of communication software systemsbased on formal specification techniques 451G. Leon, J.L. Ferrero, A. de la Fuente, F. Rodriguez, J. Ceo,A. Pinedo, A. Matarranz, J.A. de Dios (Spain)

C4.1.2 Protocol designing by Petri nets model 457P. Milosevic, A. Lazic (Yugoslavia)

C4.1.3 Analysis of the X.224 protocol over an X.25 virtual circuit 461E. Vazquez, J. Vinyes, J. Riera (Spain)

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C4.1.4 Some experiences on protocol development with formaltechniques *"F. Fournon, J. Berrocal (Spain)

C4.1.5 A system for two-wire full duplex data transmission 469S. Tomazic, A. Umek (Yugoslavia)

C5. ALGORITHMS FOR COMMUNICATION

Chairman: G. Modena (Italy)

C5.1.1 A quasi-static routing algorithm with quadraticconvergenceD.D. Dimitrijevic, H.O. Beca (Yugoslavia)

C5.1.2 Modified stop and wait scheme operating on a Burstychannel 477J.C. Medeiros (Great Britain)

C5.1.3 Evaluation of a connected speech recognizer in speaker-pooled mode using a telephone-band input voice in Italianlanguage 481E. Mumolo, P. Pierucci (Italy)

C5.1.4 Application and performances of 2-D DCT for digitaltransmission of television signals 485F. Cesa, S. Cucchi, G.L. Sicuranza (Italy)

C5.1.5 Characteristic properties of data processing bymultiprocessor computer systems 489V. Lityuk (USSR)

Dl. POWER GENERATING SYSTEMS

Chairman: J. Peire (Spain)

D 1.1.1 A discussion of energy balance by the use of wind energysystems (invited paper) *G. Maggetto (Belgium)

D 1.1.2 A model to solve the weekly planning problem in ahydrothermal system with pump storage and safetyconstraints/. Carpio, M. Lopez, M. Valcarcel (Spain)

Dl.1.3 Production cost evaluation with energy limited units bythe segmentation technique 497S. Vassos, E. Panagiotarea, E. Karidogiannis (Greece)

Dl.1.4 Fast transient stability assessment in electric power systemsby pattern recognitionJA. Pecas Lopes, F.P. Model Barbosa, J.P. Marques de Sa(Portugal)

Dl.1.5 Power generation expansion planning using a tricriteriainteractive approach 503J.C Climaco, C.H. Antunes, A.G. Martins, J.S. Marta, A.T.Almeida (Portugal)

Chairman: G. Maggetto (Belgium)

D 1.2.1 Calculation of electromagnetic couples by using the voltagedip method, and its application to design of a supervisionsystem of turbogenerator shafts fatigue 507A.M. Alonso Rodriguez, J.J. Lasso Rubio (Spain)

D 1.2.2 Solving the transient network connection of asynchronousgenerators by a static switch (xP controlled 513AM. Alonso Rodriguez, J.C. Burgos (Spain)

Dl.2.3 Design of excitation controller for turbogenerator-systemusing exact model matching techniques 519D.P. Papadopoulos, A.K. Boglou (Greece)

D 1.2.4 Reduced order modeling of synchronous generator 523B. Grecar, D. Dolinar, K. Jezernik (Yugoslavia)

D2. POWER DISTRIBUTION AND CONTROLNETWORKS

Chairman: D. Naunin (West Germany)

D2.1.1 Future trends in electricity distribution technologies(invited paper) 527E. Comellini (Italy)

D2.1.2 Parallel solution of power system analysis problems 537A. Torralba, A. Gomez, L.G. Franquelo (Spain)

D2.1.3 Power system load flow equivalents for the Hellenictransmission system 541P. Lekka, N. Hatziargyriou, G.C. Contaxis (Greece)

D2.1.4 Performance evaluations of HVDC systems under faultconditions 545B. Delfino, G.B. Denegri, M. Invernizzi, P. Pinceti (Italy)

Chairman: M. Cumo (Italy)

D2.2.1 Optimal long-range expansion planning of transmissionnetwork 549M.A.H. El-Sayed (Qatar)

D2.2.2 Optimal planning of the power distribution systemexpansion 553/./. Ramirez Rosado", T. Gonen"", A. Pastor Gutierrez"("Spain °°USA)

D2.2.3 Performing multiobjective interactive programming on amicro-computer: an application for the Greek electricitypower system 559C. Charalambopoulos, M. Androulakis, S. Papathanassiou,J.E. Samouilidis (Greece)

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D2.2.4 An integrated framework for regional energy-economyplanning: the modelling system 563G. Mentzas, V. Assimakopoulos, T. Goumas, P. Capros,J.E. Samouilidis (Greece)

D2.2.5 Multi-state reactive power optimization 567C.B. Somuah, H.M. Baidas, G. Opoku (Saudi Arabia)

Chairman: J. Uceda (Spain)

D2.3.1 Restoration of observability in power system stateestimationG.C. Contaxis, G.N. Korres (Greece)

D2.3.2 Dynamic properties of a power system equivalent modelfor transient stability studies 577F. Gubina", P. Omahen", J. Machowski"" ("Yugoslavia""Poland)

D2.3.3 The Lyapunov equation; an application to interconnectedpower systems 581D.E. Ventzas (Greece)

D2.3.4 Transient stability study of weak AC systems in thepresence of HVDC links 5 8 5

T. Maris, A. Lygdis, G. Giannakopoulos, N.A. Vovos (Greece)

D2.3.5 The RACE system. A prototype for automatic, control andsupervision of energy networks in existing large-sizedbuildings and factoriesA. Azzoni, C. De Nard, A. Negri (Italy)

Chairman: P. Peiser (Italy)

D2.4.1 Microcomputer device for metering and billing of electricalenergy consumption with a large number of participants 593M. Pravdic, P. Bosnjakovic, M. Rodic (Yugoslavia)

D2.4.2 On the use of state-feedback in the design of elementaryswitching regulators 601E. Bertran, L. Martinez, A. Poveda (Spain)

D2.4.3 Small signal model of a CUK-type PWM shunt regulator 605A. Poveda, L. Martinez, J. Bordonau, J. Cabestany (Spain)

D2.4.4 DC motor parameter estimation using deterministic signals 609K. Jezemik, M. Milanovic (Yugoslavia)

D2.4.5 Improving the transmitting capability of high capacitivecables feeding large synchronous motors 613A.A. Shaltout, MM. Abdel-Aziz (Egypt)

D3. ALTERNATIVE ENERGY SYSTEMS

Chairman: A Braunstein (Israel)

D3.1.1 Wind energy recovery systems-basic ideas and theirrealization (invited paper) 617D. Naunin (West Germany)

D3.1.2 Autonomous wind energy conversion system incorporatingenergy storage 623T.S. Davies, CM. Jefferson, WM. Somerville (Great Britain)

D3.1.3 A new control strategy for the energy recovery in windenergy systems using induction machines 627/. Suchaneck, D. Naunin (West Germany)

D3.1.4 The need for integration in use of renewable sources 631K.A. Nigim, H.H. Nigim (Israel)

D4. SOLAR CELLS

Chairman: C. Kagarakis (Greece)

D4.1.1 New concepts in concentrating photovoltaics (invitedpaper) 635A. Luque (Spain)

D4.1.2 Large-area, high-efficiency, BSF-type silicon solar cells 639A.P. Silard, G. Nani (Romania)

D4.1.3. Optical, electrical and structural characteristics ofamorphous undoped Si thin film 643M. Tasevski, D. Gracin (Yugoslavia)

D4.1.4 Occupation probability distribution and use of quasi-Fermilevels in a-Si 647/. Furlan, S. Amon, F. Smole (Yugoslavia)

D4.1.5 Analytical determination of a-Si dark conductivity 651/. Furlan, S. Amon, F. Smole (Yugoslavia)

D5. SOLAR ENERGY SYSTEMS

Chairman: A De Carli (Italy)

D5.1.1 Optimal power flow control of solar photovoltaic energysystem (invited paper) 655F. Harashima, S. Kondo (Japan)

D5.1.2 Design, realization and initial operating experience of the300 kWp photovoltaic Delphos plant 659LM. Fabriani (Italy)

D5.1.3 Computerized determination of the optimum configurationfor photovoltaic water pumping systems 663/. Diaz, J. Sanz, J. Peire (Spain)

D5.1.4 Performance analysis of a DC/DC converter inphotovoltaic systems 667N. Locci, F. Mocd, M. Tosi (Italy)

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Chairman: F. Harashima (Japan)

D5.2.1 Contribution to the power processing of photovoltaicsystems (invited paper) 671A. Braunstein, S. Singer (Israel)

D5.2.2 Solar central receiver joint program 675M. Castro", M. Alonso", J. Peire", A.C. Skinrood"" ("Spain -°°USA)

D5.2.3 Software facilities in a hardly conditioned procedure ofirradiation measurement in solar central receiver powerplants 6 7 9

R. Sebastian, R. Ruiz-Fdez (Spain)

El. MEASUREMENTSChairman: A. Vander Vorst (Belgium)

El. 1.1 Electrostatic analysis of a coaxial cable with a continuouslongitudinal slot 683A.S. Carvalho Femades, DAM. Levy (Portugal)

El. 1.2. Loss calculation in symmetrically infinite strip unstableoptical resonator using different techniques 687M.H. Rahanavard, J. Zare-Moodi (Iran)

El.1.3 The design and contraction of a humidity meter based onmicrocomputer 691H.J. Abbas, J.S. Aziz (Iraq)

El. 1.4 Soil field capacity: measurements and empirical formulae 695J.K. Ali, J.S. Aziz, M.T. Al-Naimy (Iraq)

El.1.5 Microprocessor-based system for a radiotherapy apparatus 697K. Kozlowski, W. Bajsert (Poland)

El.1.6 Calibration of ANA with microstrip connectors 701D. Kostevc, J. Mlakar, L. Trontelj (Yugoslavia)

E2. REMOTE SENSINGChairman: V. Cappellini (Italy)

E2.1.1 The spotlight mode to solve high resolution problems inimaging radars 705S. Barbarossa, G. Picardi, G. Taranto (Italy)

E2.1.2 An early comparison of the pre-operation Navstar GPS(USA) and Glonass (USSR) satellite navigation systems 711S.A. Dale, P. Daly (Great Britain)

E2.1.3 A digital implementation of a chirped waveform forsatellite application 725T. Bucciarelli, V. Pettenello, A. Salvati (Italy)

E2.1.4 Thermal blooming of lasers in humid atmosphere: on thedimensionless optical distortion figure of merit 7 1 9

F.Z. El-Halafawy", El-Sayed A. El-Badawy"", M.A. El-Gammal°, KM. Aly" ("Egypt ""Lebanon)