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On the First Schrödinger Paper on Quantum Mechanics, by
L. Skála, V. Kapsa
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Positive and Flux Conservative Method for Solving
One-Dimensional Vlasov-Poisson Equation,
by M. Ghabbouri, A. Boulezhar, D. Saifaoui, M. El Mouden
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Effects of Atom-light Interaction
Parameters on the Photonic Mean Numbers and Atomic Level
Populations in the Interaction of Three Level Atoms with
Classical and Coherent Fields, by B. Vaseghi, M. M. Golshan, A.
Fallah Zadeh
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Modelling of Collision in the Plasma Sheath and the
Cathode Erosion of Eletrical Arc, by B. Zine, D. Saifaoui, A.
Dezairi, M. El Mouden, M. Eddahby
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Determination of Proton Structure Function at Low
and High Q2, by
G. Forozani, S. Soheyli
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ESR Study of Spin Hamiltonian and Crystal Field
Energy Levels of Gd3+
in Natural Zircon, by A. Mungchamnankit, P. Limsuwan
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Swelling of Poly (Acrylates) Interpenetrating
Polymer Networks in Isotropic Solvents, by K. Boudraa, T.
Bouchaour, U. Maschke
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Study and Analysis of Transitions in Rochelle Salt, by
M. Ourrad, T. Benouaz, A. Cheknane
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Permittivity and Conductivity Evaluation of
Cylindrically Shaped Homogeneous Bodies: Basic Principles and
Quadrupole System Measurement Method, by J. A. Brandão Faria
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Transient EM Fields Generated By Buried Conductor, by
M. Lefouili, B. Nekhoul, B. Harrat, K. Kerroum, K. El Khamlichi
Drissi
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International Review
of PHYSICS - Papers
 On
the First Schrödinger Paper on Quantum Mechanics
by L. Skála, V. Kapsa
Abstract - In his
first paper on quantum mechanics, Schrödinger made attempt to derive his
famous stationary equation from the Hamilton-Jacobi equation of
classical mechanics. The ansatz he made in the relation between the
classical action and the wave function is analyzed and reformulated in a
way consistent with the standard interpretation of quantum mechanics.
Copyright © 2007 Praise Worthy Prize S.r.l. -
All rights reserved
Keywords:
classical mechanics, quantum mechanics, Hamilton-Jacobi equation,
Schrödinger equation.
Positive and Flux Conservative Method for Solving One-Dimensional
Vlasov-Poisson Equation
by M. Ghabbouri, A.
Boulezhar, D. Saifaoui, M. El Mouden
Abstract - The
Positive and Flux Conservative (PFC) scheme already proposed by F.
Filbet was used in this paper for solving the One-dimensional Vlasov
equation using the phase space grid in order to study some standard
problems of plasma simulation like: linear and non linear Landau
damping, the recurrence effect for a free streaming distribution and two
stream instability. The method is based on a time splitting technique
that gives two forms of transport equation. These equations were solved
using a third-order polynomial in space and velocity taking into account
the conservation of the flux of particles, energy and positivity in
order to control spurious oscillations. The numerical results obtained
are stable, accurate and comparable with those obtained by PIC (Particle
In Cell) and SL (Semi Lagrangian) simulation.
Copyright © 2007 Praise Worthy Prize S.r.l. -
All rights reserved
Keywords:
Vlasov-Poisson equations, distribution function, non linear
effects, PFC method.
Abstract -
In this
paper, the phenomenon of collapse and revival in the interaction of
three-level atoms (Λ-configurtion) with two electromagnetic fields is
studied .We investigate the interaction when one of the fields is
quantum mechanically coherent and the other is classical. The atoms are
initially assumed to be in their ground states or in a maximal atomic
coherency. For each case ,the mean photon numbers and atomic level
populations are calculated. From plots of these quantities, as functions
of time and for different values of atom – light interaction parameters,
the following results are deduced. (1)In all cases the phenomenon of
collapse and revival in the photonic mean number and atomic level
populations occur. (2)As the atomic system is initially in a coherent
superposition of the two lower states , the mean photon number ,while
depending on relative phase of the induced transition dipole moments, is
enhanced. The atomic level populations would also depend upon this
relative phase.
Copyright © 2007 Praise Worthy Prize S.r.l. -
All rights reserved
Keywords:
Collapse And Revival; 3-Level Atom; Coherent Fields.
Modelling
of Collision in the Plasma Sheath and the Cathode Erosion of Eletrical
Arc
by B. Zine, D. Saifaoui,
A. Dezairi, M. El Mouden, M. Eddahby
Abstract - The paper
present a simple model of collision in the plasma sheath and the cathode
erosion of elecrical arc. The first part of this work treats the
modelling and simulation of the effects of ions collisionality on the
plasma sheath and we study the collisional dependence of the sheath
width and the ion impact energy on the wall using the Runge-Kutta
routine on the presence or the absence of the term source in the
continuity equation. In the second part, we use a coupling between the
equation obtained from the sheath and the heat balance equation of the
cathode spot to describe the erosion rate of the cathode taking into
account the physical phenomena such as ion and electron fluxes,
radiation, thermal conductivity and evaporation.
Copyright © 2007 Praise Worthy Prize S.r.l. -
All rights reserved
Keywords:
sheath, modelling collision, cathode erosion, impact energy,
sheath width, spot.
Determination of Proton Structure Function at Low and High Q2
by G. Forozani, S.
Soheyli
Abstract -
Measurements of proton structure functions at different range of Q2
and x are presented. The structure functions FL and F2
have been extracted by combining two e+p measurements of
neutral current deep inelastic scattering. These experiments are
presented by H1 collaboration at HERA in different proton energies. The
results show good agreement with next to leading order fitting at low x.
In another approach, a method is presented to obtain an approximate
relation between the reduced cross section and F2(x,Q2)
derivative at low Q2 and low x (0-0.003). The resulting
formula can be used to determine F2 and FL from
the HERA reduced cross section data taken at low x. A measurement of the
structure function xF3 at very high Q2
(1500-12000) is obtained using e+p H1 data and e-p
data published by ZEUS collaboration.
Copyright © 2007 Praise Worthy Prize S.r.l. -
All rights reserved
Keywords:
Cross section, Deep inelastic scattering, Reduced cross section,
Structure functions.
ESR
Study of Spin Hamiltonian and Crystal Field Energy Levels of Gd3+
in Natural Zircon
by A.
Mungchamnankit, P. Limsuwan
Abstract -
X-band ESR spectra of Gd3+ in the unheated zircon and
heat-treated zircons in oxygen and argon atmospheres were carried out.
The ESR spectra were measured at room temperature with the applied
magnetic field parallel and perpendicular to the c-axis [001] of zircon
crystal. The crystal filed parameters were calculated by using a
numerical diagonalization of the spin Hamiltonian matrix. The results
show that B20 is much larger than the other
crystal field parameters and slightly difference in each condition of
heat treatment. This result reveals that the heat treatment has effect
to on nearest neighboring O2- ions of Gd3+ which
replaced the Zr4+ site. The energy level diagrams of Gd3+
in unheated zircon, heat-treated zircons in oxygen and argon atmospheres
are direct consequence of the crystal field parameters difference.
Copyright © 2007 Praise Worthy Prize S.r.l. -
All rights reserved
Keywords:
Crystal field, Electron spin resonance, Natural zircon.
Swelling of Poly (Acrylates) Interpenetrating Polymer Networks in
Isotropic Solvents
by K. Boudraa, T.
Bouchaour, U. Maschke
Abstract - This work
relates the study of the swelling of Poly(Acrylates) interpenetrating
polymer networks (Poly Hexyl-Ethyl-Acrylate and Poly Butyl-Acrylate) in
isotropic solvents. The investigated systems are prepared via
photo-polymerization by UV-curing of monomers in the presence of a
difonctionnel cross-linker and a photo-initiator. Effects of composition
and temperature are evaluated by measuring the size and the mass of dry
and swollen samples. Simple modelling is used to rationalize the
experimental results obtained.
Copyright © 2007 Praise Worthy Prize S.r.l. -
All rights reserved
Keywords:
Interpenetrating polymer networks, isotropic solvents, swelling
kinetics, Fick model.
Study
and Analysis of Transitions in Rochelle Salt
by M. Ourrad, T. Benouaz,
A. Cheknane
Abstract - At the
Curie temperature, the properties of dielectrics undergo phase
transitions. The landau’s theory is used here to investigate these
transitions for a dielectric medium placed between the anode and cathode
of a capacitor. In particular, we investigate the variation with
temperature of the induced electric current.
Copyright © 2007 Praise Worthy Prize S.r.l. -
All rights reserved
Keywords:
Dielectric, Electric Induction, the Landau’s theory of phase
transition, nonlinear capacitor.
Permittivity
and Conductivity Evaluation of Cylindrically Shaped Homogeneous Bodies:
Basic Principles and Quadrupole System Measurement Method
by J. A. Brandão Faria
Abstract - This
paper presents the theoretical foundations and basic measurement
principles concerning the evaluation of the permittivity of a
cylindrical dielectric rod and the conductivity of a circular conducting
disk in the framework of stationary regimes. The novelty resides in the
fact that both measurement methods exploit the same theoretical
substrate — the well-known electrostatic field distribution of two
symmetrically charged filaments. The simplicity of the proposed methods,
together with the fact that only basic equipment is required to carry
out the necessary measurements, makes this contribution significant.
Copyright © 2007 Praise Worthy Prize S.r.l. -
All rights reserved
Keywords:
Permittivity Measurement, Conductivity Measurement, Stationary
Regimes, Electromagnetic Field Equations.
Transient
EM Fields Generated By Buried Conductor
by M. Lefouili, B.
Nekhoul, B. Harrat, K. Kerroum, K. El Khamlichi Drissi
Abstract - In this
paper, a new computational approach for characterizing the transient
electromagnetic fields generated by buried conductor is proposed. The
theoretical expressions, in the time domain of electromagnetic fields,
generated by an electric dipole immersed in an infinite conductive
medium are developed. For a semi-infinite dissipative medium, the
interface soil-air is taken into account using a modified image theory.
The computation results are based on a general formulation, in time
domain, which permits the observation point in air or soil. The
influences of the length and location of feed point of grounding
electrode are analyzed.
Copyright © 2007 Praise Worthy Prize S.r.l. -
All rights reserved
Keywords:
Transient, electromagnetic field, hertziens dipoles, grounding
system.
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