International Journal of Reciprocal Symmetry and Theoretical Physics

80-90

Authors: Askold Duviryak

A potential of pointlike mass in the partially compactified multidimensional space is considered. The problem is reduced to the multidimensional Poisson equation with the Dirac comb source in r.h.s. Explicit solutions are built in the cases of 2D and 4D spaces with one compact dimension. The last example of the potential is used in the Schrödinger equation. Bound states of a gravitating test particle on 3D brane of 4D compactified space are studied by means of various approximate methods.

106-110

Authors: Shirin Akter, M. Monjur Ahasan, Md. Joynal Abedin, Rajada Khatun, Ashrafun Nahar Monika

In this work Proton-Induced X-ray Emission (PIXE) technique has been employed for the determination of elemental concentration of soil samples. PIXE analyses have been carried out using a 2.5 MeV proton beam generated with the aid of the 3 MV tandem accelerator of the Institute Nuclear Science and Technology, Atomic Energy Research Establishment, Savar, Dhaka. The X-ray and particle spectra were processed using MAESTRO software and GUPIX software. The elements identified in the soil samples using PIXE were K: 6040.33, Ca: 2018.07, Ti: 3826.5, V: 188, Cr: 1472.22, Mn: 482.37, Fe: 33330.17, Co: 738.47, Ni: 480.95, Cu: 464.42 and Zn: 2144.93 ppm respectively. The legitimacy of the method was done by analyzing Standard Reference Material IAEA soil standard 2586 and found to be compatible. PIXE is a multi element systematic technique used for the determination of major, minor and trace elements in the range of parts per million (ppm).

116-124

Authors: Gezahegn Assefa, P. Singh

We report the effect of external electric field (EEF) on the magnetic properties of MnxGe1-x, diluted magnetic semiconductor (DMS). We present a Kondo Lattice Model (KLM) type Hamiltonian with exchange coupling between localized spins, itinerant holes and the EEF. The magnetization, the dispersion and critical temperature (Tc) are calculated for different values of EEF parameters (α) using double time temperature dependent Green function formalism. The enhancement of the (Tc) with the EEF is shown to be a very distinct and is in agreement with recent experimental observation and much required for spintronics applications and devices.

141-152

Authors: Robert Nazaryan, Haik Nazaryan

The aim of this current article is to illustrate in detail Armenian relativistic formulas and compare them with Lorentz relativistic formulas so that readers can easily differentiate these two theories and visualize how general and rich our Armenian Theory of Special Relativity really is with a spectacular build in asymmetry. Then we are going behind this comparison and illustrating that build in asymmetry inside Armenian Theory of Special Relativity is reincarnating the aether as a universal reference medium, which is not contrary to relativity theory. We mathematically proved the existence of aether and we show how to extract infinite energy from the time-space or sub-atomic aether medium. Our theory explains all these facts and peacefully brings together followers of absolute aether theory, relativistic aether theory or followers of dark matter theory. We just need to mention also that the absolute aether medium has a very complex geometric character, which has never been seen before. We are explaining why NASA’s earlier "BPP" and DARPA’s "Casimir Effect Enhancement" programs failed. We are also stating that the time is right to reopen NASA’s BPP program and fuel the spacecrafts using the everywhere existing aether asymmetric momentum force.

20-35

Authors: Atikur Rahman Baizid, Md. Shah Alam

Lorentz transformation is the basic tool for the study of Relativistic mechanics. There are different types of Lorentz transformations such as Special, Most general, Mixed number, Geometric product, and Quaternion Lorentz transformations. In this paper we have studied the reciprocal property of the above mentioned Lorentz transformations. PACS: 03.30. + p Key Words: Lorentz transformation and Reciprocal Property.

43-68

Authors: Haradhan Kumar Mohajan

The Friedmann, Robertson-Walker universe is based on the assumption that the universe is exactly homogeneous and isotropic. This model expresses that there is an all encompassing big bang singularity in the past as the origin from which the universe emerges in a very hot phase and continues its expansion as it cools. Here homogeneous and isotropic assumptions of the observed universe are not strictly followed to calculate the present age of the universe. Einstein equation plays an important role in cosmology to determine the present age of the universe. The determination of present age and density of the universe are two very important issues in cosmology, as they determine the future evolution and the nature of the universe. An attempt has been taken here to find the upper limit of the age of the universe with cosmological constant. PACs: 98.80-Bp: Origin and formation of the universe Keywords: Einstein equation, Geodesic, Hubble constant, Space-time manifold, Universe