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A
Solution of the Weyl-Lanczos Equations for a Type N Space-Time
-- Peter O'Donnell and
Andrew Roberts
By
using the Weyl - Lanczos equations in spin coefficient form,
the coefficients of the Lanczos potential are found for a
type N space-time admitting a rational first integral of the
geodesic equation.
©
2008 The Icfai University Press. All Rights Reserved.
Two-Dimensional
Harmonic Oscillator : Its
Ladder Operators -- J
López-Bonilla and L Cruz-Beltrán
The
present paper provides a brief study on elementary properties
of associated Laguerre polynomials that generate the ladder
operators for the harmonic oscillator radial wave function
in two dimensions.
©
2008 The Icfai University Press. All Rights Reserved.
A
Weight Vector Lms Algorithm for Adaptive Array Antenna
-- Marco A Acevedo and Oleksy
Pogrebnyak
Dipole
antennas are widely used in communications, especially when
they are used as adaptive arrays. A modification to Least
Mean Square (LMS )algorithm is proposed to modify the electric
radiated field of a linear array adaptive antenna. Using the
array factor , the array radiation pattern is modified , when
two signals of interference with distinct directions arrived
at the same time. The application example is a seven element
adaptive array , designed using the array factor weights to
reduce side lobes. Some results are presented to determine
the value of m and the number of iterations.
©
2008 The Icfai University Press. All Rights Reserved.
On
Einstein's 1905 Paper, E = mc2
-- A
K Hariri, N Hamdan and A Dahan
The
derivation of mass-energy equivalence, called Einstein's Relation,
was derived through different ways by Einstein and appeared
in his article published in 1905. In this research paper,
the authors present Einstein's method in new ways, where a
general method valid to all of the relativistic and non-relativistic
phenomena is proposed by applying the physical law and the
classical principle of relativity.
©
2008 The Icfai University Press. All Rights Reserved.
The
Homopolar Motor : The
Burial of Grassmann's Force --
Jorge Guala-Valverde
and Ricardo Achilles
The
growing interest in a thorough revision of the tenets of classical
electrodynamics (Achilles and Moreno, 2006 )compels the physics
community to reconsider the dominating magnetic field rationale
applied to electrodynamics since the time of Lorentz. The
torque-production mechanism presently attributed to homopolar
machines, which is based on Grassmann's force, has been definitively
ruled out by recent crucial experimentation. Conversely, Ampere's
force law, restating the Newtonian symmetry requirement for
energy conversion, fully explains homopolar torque production
(Achilles and Guala-Valverde, 2007).
©
2008 The Icfai University Press. All Rights Reserved.
On
the Faraday's Complex Vector --
Nizar Hamdan, I Guerrero-Moreno, J López-Bonilla and
L Rosales Roldán
This
article shows that Faraday´s complex vector permits to
obtain, of natural manner, the complex vectorial, quaternionic
and spinorial versions of the real vectorial Maxwell equations
in vacuum.
©
2008 The Icfai University Press. All Rights Reserved.
Generalized
Coherent States and Non-Linear Schrödinger Equation
-- M Guadalupe Frías, Ma
Lourdes Najera, Ricardo Garcia and Maximo Agüero
The
quantum coherent states were established under the bases of
the quantum laws of the nature. These coherent states play
an important role in science and technology, for example in
optics, where they are used in the theoretical and experimental
study of lasers. Here, some of the properties of these quantum
states and some of their applications to many-body classic
problems of modern physics related to the well-known non-linear
Schrödinger equation are analyzed.
©
2008 The Icfai University Press. All Rights Reserved.
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