Open Access Short communication

HyPIR Electrolysis for a 0.25 M Epsom Salt Solution

John R. Fanchi

Asian Journal of Research and Reviews in Physics, Page 1-5
DOI: 10.9734/ajr2p/2021/v4i230137

Previous laboratory work using a 0.12 M Epsom salt solution showed that HyPIR Electrolysis, or Hydrogen Production by Infrared Electrolysis, can increase the rate of hydrogen production from a solution of Epsom salt dissolved in water by irradiating the electrolyte with an optimum wavelength of light. This article presents data for a 0.25 M Epsom salt solution. A comparison of the data for different molarities shows that an increase in molarity of the electrolytic system decreases the rate of hydrogen production.

Open Access Short communication

Phase Change and Space Travel

John H. Jennings

Asian Journal of Research and Reviews in Physics, Page 48-51
DOI: 10.9734/ajr2p/2021/v4i230141

Here we discuss the implications of phase change equations and what bearing they might have on interstellar space travel.  The phase change equations are derived from either thermodynamics or statistical mechanics and have a similarity. Then, the main equation for limit of superheat is posited to be a solution to the problem of propulsion in space travel.  There are two matter-antimatter systems considered: electron – positron and hydrogen – antihydrogen.  What is involved in the space travel problem is harvesting of antimatter in magnetic bottles and keeping it separate.

Open Access Original Research Article

Instantaneous Ionospheric Scintillation Mapping over the East African Region by use of GPS Derived Amplitude Scintillation Proxy

Emirant Bertillas Amabayo, Geoffrey Andima, Richard Cliffe Ssenyunzi

Asian Journal of Research and Reviews in Physics, Page 6-20
DOI: 10.9734/ajr2p/2021/v4i230138

Ionospheric scintillation activity over the East African region is often monitored using measurements from the SCIntillation Network Decision Aid (SCINDA) receivers. Many of the SCINDA receivers over East Africa are currently not archiving data and therefore a large part of the region remain un sampled. We investigated the possibility to use dual frequency receivers of the Global Navigation Satellite System (GNSS) network for scintillation mapping. A proxy for amplitude scintillation was first derived by scaling the rate of change of total electron content index (ROTI). The proxy was validated against S4 derived from nearly collocated SCINDA receivers over the region. A good correlation was observed between the proxy and S4. The proxy was then used to map the occurrence of amplitude scintillation over East Africa based on semivariogram modeling and Kriging interpolation technique. The results indicate that the S4 values had a good positive correlation with *Corresponding author: E-mail: emirant.amabayo@gmail.com; Amabayo et al.; AJR2P, 4(2): 6-20, 2021; Article no.AJR2P.66815 the simulated S4p from the Kriging interpolation. This observation suggests that data from the dual frequency receivers of GNSS may be used to map scintillation over East Africa. These maps can in turn be used to study the evolution of ionospheric scintillation patterns over the region.

Open Access Original Research Article

Cosmological effects on Size Evolution of some Extragalactic Radio Sources and Quasar/Galaxy Unification

Ezeugo Jeremiah Chukwuemerie

Asian Journal of Research and Reviews in Physics, Page 21-24
DOI: 10.9734/ajr2p/2021/v4i230139

We use analytical methods to develop a mathematical model that expresses the relationship between the linear size  of some extragalactic radio sources (EGRS) and their redshift . Result shows that , where . For the purpose of obtaining an empirical relation of similar form, we carry out simple linear regression analyses of the observed linear sizes of these EGRS in our sample against their respective observed redshifts. We obtain an empirical relation of the form, , where  and  for radio-loud quasars and radio galaxies respectively, with correlation coefficients given by,  for each of the sources. The correlation is marginal/slight. Comparing the theoretical and empirical relations, we find that the  data show an inverse correlation which is similar to the theory. This suggestively indicates presence of cosmological effects on the size evolution of the radio sources. Moreover, we find that similarity in the behavior of the two sources in the  plane, simply supports quasar/galaxy unification scheme in which the different observable properties that characterize these two subclasses of radio sources are aspect-dependent.

Open Access Original Research Article

A Quantum Optical Approach to the effect of a Laser Mode on the Motion of Atomic Vapor by Varying the Field Coherence Angles

Aly M. Abourabia, Amany Z. Elgarawany

Asian Journal of Research and Reviews in Physics, Page 25-47
DOI: 10.9734/ajr2p/2021/v4i230140

We follow theoretically the motion of the sodium atoms in vapor state under the influence of a laser mode in (1 + 1) D, which is achieved by introducing different optical filters. In the Dirac interaction representation, the equations of motion are represented via the Bloch form together with the Pauli operators to find the elements of the density matrix of the system. The emergence of the principle of coherence in varying the angles of the laser mode permits the evaluation of the average force affecting the atoms' acceleration or deceleration, and hence the corresponding velocities and temperatures are investigated. The atomic vapor is introduced in a region occupied by a heat bath presented by the laser field, such that the state of the atomic vapor is unstable inside the system due to the loss or gain of its kinetic energy to or from the laser field. This instability is studied by finding the eigenvalues of the system's entropy. Resorting to the assumption of Botin, Kazantsev, and Pusep, who issued in the presence of the weak and strong spontaneous emission, a coupling between the mean numbers of photons in terms of time, which allows the evaluation of the rate of entropy production of the system under study. No singularities are found throughout the process of equations solving and other calculations. Resorting to symbolic software, a set of figures illustrating the nonlinear behavior in the dynamics of the problem is present. In this paper, we introduce a theoretical study of the effect of two-counter propagation traveling plane waves on the motion of the sodium atoms in the vapor state by varying the coherence angles to investigate the atomic behavior. Good agreements are found with previous studies.