Agota Lang & Dora Horvath Szechenyi Grammar School Sopron, Hungary 2005CERN.
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Transcript of Agota Lang & Dora Horvath Szechenyi Grammar School Sopron, Hungary 2005CERN.
Agota Lang & Dora Horvath
Szechenyi Grammar School
Sopron, Hungary
2005 2005
CERNCERN
NEURONNEURON ++ DIODEDIODE
== NEURODENEURODE
Neuron: this is a typical conception in biologyDiode: this belongs to the area physics What can we get if we add this two concepts?The result of the addition is neurode: our model that models nerve-cells.
HOW CAN YOUHOW CAN YOU
MODELMODEL
NERVE-CELL?NERVE-CELL?
Studying of phenomena
Practical applying of model inside of validity limit
Choosing the significance properties
Building the model
Controlling the work of modelGiving validity limit
Outside of validity limit:improving and enriching of model
THE STEPS OF MODELLING:
SENSORY NERVE CELL
INTERMEDIATE NERVE CELL (INTERNEURON)
MOTOR NERVE CELL
.
The idea comes from the book The computer an the Brain of John Neumann.
Our models show the physical working of nerve-cells.
Illustration of nerve-cell
Photo of our nerve-cell model
Dendrites
Nucleus of cell
Cell-body
Axon
Synapsis
In effect the model is little circuit in a little toy (Duplo) cube. The circuit contains diodes, transistor, LED and resistances. If a stimulus arrives in the stimulating input, then the LED lights and comes up voltage in the output. If a stimulus arrives in the obstructive input, then the LED lights no more and there is any voltage in the output.
rectifier diodes
resistances
LED
transistor
00 0
outputstimulating input
obstructiveinput
Circuit diadram of model
obstructive input LED
Groundinput
Stimulatinginput
Ground output
output
Photo sensor
Sound sensor Thermo sensor
There’s 3 types of nerve-cells in biology, and we’ve got three kinds of models too. These are the sensory nerve cell (these are photo, thermo and sound sensitive ), the intermediate (relay) nerve cell and the motor nerve cell (in this there’s really a little motor).
The voltage in the stimulating input is less as the stimulus threshold (=opening voltage), the LED doesn’t light
The LED doesn’t light because the model becomes voltage in the obstructive input too
The voltage in the stimulating input is more as the stimulus threshold the LED lights
Modelling of stimulus threshold
Validity limit:
Our neuron-model has only 2 input and 1 outputIn reality every dendrits can work as a stimulating input or as an obstructive input tooStimulus threshold dipents on the number of stimulating signal
From this ready nerve cell models we built a chain that begins with sensory nerve cell, then come 3-4 intermediate nerve cells and at the end a motor nerve cell.
The neuron-chain at work in case of light
The neuron-chain at work in case of heat
The neuron-chain at work in case of sound
But there’s an important missing element without our model couldn’t be a good nervous system model. This is called brain at the full-blown organisms. Our model is the computer. It could make a decission with a program in Microsoft Windows Logo. The subject of the ready model is Garfield, the lazy cat. Normally it dreams about a very big hamburger. If there’s something changing in its surround, its dream is changing by this effect. So in case of sound, it’s dreaming about a clock, in case of warm that’s a hearth, and in case of light its dream is Sun. At the end of the experiment Garfield wake up and go to the window to make dark.
Garfield’s reflection in case of heat.
Garfield’s reflection in case of sound
Garfield’s reflection in case of light.
There is nobody who helps so Garfield self goes to make dark
SOMEBODY LET MAKE DARK…
Name: Ágota LANG
Time & place of birth: 24.03.1965 Szeged (Hungary)
Qualification:
physics, mathematics MSC at the University Szeged, 1988
Informatics MSC at the Eötvös Loránd University, 1998
Job: secondary school teacher
Place of work: Széchenyi István Grammar School, Sopron
E-mail address: [email protected]
Organizing the Physics-Run in the Forest
Organizing the Relay if Light between Sopron (H) and Neuseedler am See (A)
Demonstrating tricky physical experiment in the school yard
Roving in the History of natural Science with the pupils of Roving in the History of natural Science with the pupils of Széchenyi Grammar School, SopronSzéchenyi Grammar School, Sopron
Written and directed by meWritten and directed by me
On the Stage as Vogon Grandmother
Don’t Panic!
In directing
I was awarded in 2005 by ERICSSON for my work in the popularization of physics
That’s me in red in Technorama (Winterthur /S/)
In the island Ven, where Tycho Brache worked
On the Arctic Circle
For example in Berner Alps
Name: Dóra HORVÁTH
Time & place of birth: 12.05.1987 Sopron (Hungary)
Qualification:
Maturity at Széchenyi István Grammar School, Sopron
Job: student
Place of work: Budapest University of Technology
E-mail address: [email protected]
If you are considerate you can find her on the photos too