Dr' Amr Khairat Radi

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• Dr. Amr Khairat Radi

Department of Physics Faculty of Science Ain
Shams University Cairo, Egypt
A.Radi_at_Asunet.shams.edu.eg
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Publications
1- Prediction of Non Linear system in Optics
Using Genetic Programming, International Journal
of Modern Physics C, vol.18, No.3, pp. 369-374
(March 2007 ). This paper also published in the
31 international conference for statistics,
computer science and its application 2-6 April
2006. 2- Genetic Programming approach for
electron-alkali-metal atom collisions,
International Journal of Modern Physics B,
vol.20, No.32, pp. 5463-5471 (December 2006 ). 3-
Genetic Programming approach for flow of steady
state fluid between two eccentric spheres , Appl.
Rheol. 176 (2007) 68210
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First Applications of GA GP in Optics

• Optical fiber is a dielectric transparent medium
  which conducts and guides light and has many
  applications in different fields (ex
  communications) due to its superior optical
  properties.
• For example zero-dispersion wavelength is one of
  optical properties of fiber. These optical
  properties are affected by temperature.
• Variations of the optical properties of an
  optical fiber with temperature are of optimum
  importance in many optical and optoelectronic
  applications (why)
• Our aim to study the effect of room temperature
  on the optical properties

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First Applications of GA GP in Optics cont.
Two-term Sellmeier dispersion relation had been
adopted and fitted to the experimental refractive
index data in the form (1)
? is the wavelength measured
in micrometers. Here A, B, C, D, and E are called
the dispersion parameters of the fiber
core/cladding materials.
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First Applications of GA GP in Optics cont.

• Nonlinear equation which can be solved
  numerically by using a suitable numerical
  calculation program.
• However, a set of parameter values A, B, C and D,
  in many cases, will not be uniquely determined
  (not agreed with the previous experimental data).
• many different regions of parameter space are
  investigated simultaneously.
• The results agree well with all previous Authors
  works.

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First Applications of GA GP in Optics cont.

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Introduction
First Applications of g GA GP enetic
programming in Optics
Experimental and predicted refractive index
dispersion formula of the core of fiber.
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First Applications of GA GP in Optics

• In conclusion, GA succeeded to find solutions for
  the variables in one equation that others methods
  could not.
• The discovered function shows an excellent match
  to the experimental data as well as, the
  predicting experimental data that are not used in
  the training session.
• GP find a model that depend on two variables (?,
  T) not one variable as in the literature.
• Finally, we conclude that GP have become one of
  important research area in the field of optics.

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Second Applications of GP in Atomic

• Alkali-metal atoms Li, Na, K, Rb and Cs atoms
  have been a subject of interest in several
  theoretical and experimental investigations in
  electron-atom collisions because of their various
  interesting applications
• The previous theoretical formula has an error 21
  with the experimental data.
• To find a function that fit the experimental data
  and can predict others, We applied the GP
  technique.

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Second Applications of GP in Atomic
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Second Applications of GP in Atomic
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Second Applications of GP in Atomic

• In conclusion, the discovered functions (the
  electron incident energy, atomic number and
  static dipole polarizability) show a good match
  to the experimental data. Moreover, the
  discovered functions are capable of predicting
  experimental data that are not used in the
  training session.
• The previous theoretical formula has an error 21
  with the experimental data but the discovered
  function has less than 10 which is acceptable
  error in physics.
• Finally, we conclude that GP have become one of
  important research area in the field of atomic
  physics.

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Third Applications of GP in fluid dynamics

• Fluids have some characteristics as viscosity and
  elasticity.
• There are instruments measured viscosity but for
  polymers that have the two characteristics
  (viscosity elasticity).
• It is difficult to measured both of them
  simultaneously, a special techniques needed
• A new technique describes by the torque and the
  forces acting on the external sphere due to
  steady state motion of viscoelastic fluid between
  two eccentric spheres.

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Third Applications of GP in fluid dynamics
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Third Applications of GP in fluid dynamics
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Third Applications of GP in fluid dynamics

• In conclusion, GP discovered two functions (for
  torque and forces ) that matched with the
  experimental calculated and predicted Data.
• Moreover, the discovered functions are capable of
  predicting experimental data that are not used in
  the training session.
• The two discovered functions are new in the fluid
  dynamics to determent the viscosity and
  elasticity simultaneously.