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First Principles Investigation of Structural, Electronic and Optical Properties of MgRh Intermetallic Compound
Lokman Ali,
Zahidur Rahaman,
Atikur Rahman,
Afjalur Rahman
Issue:
Volume 5, Issue 3, May 2016
Pages:
25-29
Received:
4 January 2016
Accepted:
13 January 2016
Published:
16 April 2016
Abstract: The structural electronic and optical properties of intermetallic compound MgRh were investigated by using the ab-initio technique from CASTEP code. In this study we have carried out the pseudo-potential plane-wave (PP-PW) method based on the density functional theory (DFT), within the generalized gradient approximation (GGA). Our calculated structural parameters and corresponding graphical values fit with other previous available experimental data and other theoretical observations. The calculated electronic band structure reveals metallic conductivity and the major contribution comes from Rh-d states. Comparison between our investigated properties and experimental data shows good agreement. The optical functions (dielectric functions, refractive index, absorption spectrum, conductivity, energy loss spectrum and reflectivity) have been calculated and discussed. This is the first quantitative prediction of the electronic and optical properties of intermetallic compound MgRh alloy, since it has not been reported yet. The calculated optical functions reveal that the reflectivity is high in the ultraviolet region up to 73 eV for MgRh, showing this to be promising coating materials.
Abstract: The structural electronic and optical properties of intermetallic compound MgRh were investigated by using the ab-initio technique from CASTEP code. In this study we have carried out the pseudo-potential plane-wave (PP-PW) method based on the density functional theory (DFT), within the generalized gradient approximation (GGA). Our calculated struct...
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Effect of Pressure and Hot Filament Cathode on Some Plasma Parameters of Hollow Anode Argon Glow Discharge Plasma
Issue:
Volume 5, Issue 3, May 2016
Pages:
30-38
Received:
1 April 2016
Accepted:
25 April 2016
Published:
23 May 2016
Abstract: The present study represents a review article and a complementary study to a published paper of direct current hot cathode and hollow anode argon glow discharge plasma at different pressures in the range 0.05 - 0.8 mbar. The glow discharge usually obtained by applying a high voltage between the electrodes sufficient to occurring breakdown of argon gas and sustaining the discharge. Additional estimation of some plasma parameters, ion temperature, degree of ionization and electron energy distribution function as well as some characteristics of glow discharge under the influence of pressure and filament current has been done. Plasma parameters have been calculated using single probe method at fixed discharge current Id=1.88mA and diameter of hollow anode. Furthermore a computer MATLAB program is applied for this purpose. Results show that the average discharge voltage increases while its average discharge current decreases according to the increasing of the filament current. On the Contrary the average discharge voltage decrease nearly exponentially whiles its average discharge current increases according to increasing of the gas pressure. Degree of ionization starts to increase from low pressure to medium and then tends to decrease toward high pressure investigated. However it starts to increase to maximum value at filament current 0.9A then tends to decrease at higher current and low pressure. While for high pressures there is no significance change. Ion temperature increases slowly with filament current up to 0.9A and then sharply increases to maximum value at 1.5A. But it decreases for pressures in the range 0.05 - 0.09 mbar and then increases with gas pressure. Electron energy distribution function (EEDFs) decrease according to increases filament current, however, it starts to increase from low pressure to maximum value at medium pressure then tends to increase according to further increases of pressure.
Abstract: The present study represents a review article and a complementary study to a published paper of direct current hot cathode and hollow anode argon glow discharge plasma at different pressures in the range 0.05 - 0.8 mbar. The glow discharge usually obtained by applying a high voltage between the electrodes sufficient to occurring breakdown of argon ...
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A Brief Commentary on Space-Time-Height Relativity
Issue:
Volume 5, Issue 3, May 2016
Pages:
39-44
Received:
8 May 2016
Accepted:
19 May 2016
Published:
30 May 2016
Abstract: This article contributes a mathematical visualization on the relativity among space-time-height accordingly with the A. Einstein’s special relativity theory. The variation of time with the increment and decrement of space and height is truly focused and elaborated inside. The Lorentz expression about the relativity interprets the relativity of mass correspondingly with the energy of matter. This proposed theory visualize the relativity among three dimensions at a time i.e. space, time and height. Space, time and height are taken as three individual dimensions and all 3D plots are sketched collaborating with these dimensions. To comprehend the theory several explanations are established and several expressions are derived and plotted manually. All the expressions conclude with a great satisfaction that the relativity of time also exists in the collaboration with space and height both instantaneously.
Abstract: This article contributes a mathematical visualization on the relativity among space-time-height accordingly with the A. Einstein’s special relativity theory. The variation of time with the increment and decrement of space and height is truly focused and elaborated inside. The Lorentz expression about the relativity interprets the relativity of mass...
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Apparent Detection via New Telescopes with Concave Lenses of Otherwise Invisible Terrestrial Entities (ITE)
Issue:
Volume 5, Issue 3, May 2016
Pages:
45-53
Received:
24 December 2015
Accepted:
25 December 2015
Published:
8 June 2016
Abstract: By using telescopes with concave lenses, known as Santilli telescopes (trademark and patent pending by the U.S. publicly traded company Thunder Energies Corporation), we review preceding evidence for the apparent existence of antimatter galaxies, antimatter asteroids and antimatter cosmic rays. Independently from these astrophysical detections, we present for the first time evidence for the apparent existence of entities in our terrestrial environment that are solely visible via telescopes with concave lenses, while being invisible to our eyes and to conventional Galileo telescopes with convex lenses, which entities leave dark images in the background of digital cameras attached to the Santilli telescopes. These entities are here called Invisible Terrestrial Entities of the first kind (ITE-1) or dark ITE. We then present, also for the first time, evidence for the apparent existence in our terrestrial environment of additional entities that are also visible to telescopes with concave lenses while being invisible to our eyes and to conventional telescopes with convex lenses, which entities leave bright images in the background of digital cameras. These additional entities are here called Invisible Terrestrial Entities of the second kind (ITE-2) or bright ITE. It is pointed out that both types of entities generally move in the night sky over sensitive areas, and their behavior generally suggests unauthorized surveillance. This paper has been motivated by the significance and diversification of the collected evidence, as well as available independent confirmations, that warrant systematic inspections of the sky over our sensitive civilian, industrial, and military installations via telescopes with concave lenses, so as to detect possible unauthorized surveillance.
Abstract: By using telescopes with concave lenses, known as Santilli telescopes (trademark and patent pending by the U.S. publicly traded company Thunder Energies Corporation), we review preceding evidence for the apparent existence of antimatter galaxies, antimatter asteroids and antimatter cosmic rays. Independently from these astrophysical detections, we ...
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