The use of a syncytium model of the crystalline lens of the human eye to study the light flashes seen by astronauts
msra(2005)
摘要
A syncytium model to study some electrical properties of the eye is proposed
in the attempt to explain the phenomenon of anomalous Light Flashes (LF)
perceived by astronauts in orbit. The crystalline lens is modelled as an
ellipsoidal syncytium having a variable relative dielectric constant. The
mathematical model proposed is given by a boundary value problem for a system
of two coupled elliptic partial differential equations in two unknowns. We use
a numerical method to compute an approximate solution of this mathematical
model and we show some numerical results that provide a possible (qualitative)
explanation of the observed LF phenomenon. In particular, we calculate the
energy lost in the syncytium by a cosmic charged particle that goes through the
syncytium and compare the results with those obtained using the Geant 3.21
simulation program. We study the interaction antimatter-syncytium. We use the
Creme96 computer program to evaluate the cosmic ray fluxes encountered by the
International Space Station.
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关键词
elliptic partial differential equation,cosmic ray,dielectric constant,international space station,numerical method,mathematical model,charged particles,boundary value problem
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