A: Physics & Space Science (178)
GJSFR: A
Comments on the 2011 Shaw Prize in Mathematical Sciences
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 4
The 2011 Shaw Prize in mathematical sciences is shared by Richard S. Hamilton and D. Christodoulou. However, the work of Christodoulou on general relativity is based on obscure errors that implicitly assumed essentially what is to be proved, and thus gives misleading results. The problem of Einstein’s equation was discovered by Gullstrand of the 1921 Nobel Committee. In ...
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Authors Dr. C. Y. LoRead Journal Click Here
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Page No. 5 to 15
Quantum mechanics, cosmic acceleration and CMB radiation
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 4
Based on the big bang concepts - in the expanding universe, rate of decrease in CMBR temperature is a measure of the cosmic rate of expansion. If universe is accelerating, CMBR temperature must decrease continuously. It is noticed that, Bohr radius of hydrogen atom, quanta of the angular momentum and the fine structure ratio - are connected with the large scale structure of the massive e...
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Authors Dr. U. V. S. Seshavatharam, Prof. S. LakshminarayanaRead Journal Click Here
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Page No. 17 to 21
In the Clear Sky: The Cosmology of the Stars
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 4
In the universe that we live, in we are surrounded by trees, plants, animals, our human beings, oxygen and various other gases that make up the atmosphere. The Milky Way of the universe comprises planets, the moon, and the sun; which is a star like the other stars in the universe. This article looks at the stars within our universe and serves to inform and emphasise their role and format...
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Authors Mr. Rishan SinghRead Journal Click Here
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Page No. 23 to 25
Magnetic Characteristics Measurements in HTc Superconductors
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 3
Selected methods for measurements magnetic quantities in HTc superconductors are discussed. First one is based on an analysis of the magnetic hysteresis curves, while second follows from the investigations of the dynamic anomalies of the current-voltage characteristics in slowly varying magnetic field. ...
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Authors Dr. J. Sosnowski, H. MalinowskiRead Journal Click Here
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Page No. 23 to 26
Reflection and refraction of bulk exchange spin wave on the interface of two ferromagnetic media in planar magnetic field
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 3
Behavior of spin wave propagation in ferromagnetic medium with non-uniform distribution of magnetic parameters is studied. In particular, the influence of external magnetic field on behavior of bulk spin wave propagating through inhomogeneity made in form of lens (lens is biaxial ferromagnet placed into biaxial ferromagnetic medium with another magnetic parameters. Ferromagnets are in th...
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Authors Dr. S. Reshetnyak, A. BerezhinskyRead Journal Click Here
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Page No. 19 to 22
Basic Model of the Stationary X-ray Induced Conductivity of Wide-Gap Semiconductors
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 3
The concept of construction and stage-by-stage development of basic model of stationary X-ray induced conductivity for wide-gap semiconductors is proposed. Within the limits of first stage, calculation of spatial distribution of the generated electrons and holes in an ideal crystal which absorbs X-ray flux is carried out and volt-ampere characteristic is calculated. ...
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Authors Dr. A.O. Sofiienko, V.Ya. Degoda, V.N. KilinRead Journal Click Here
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Page No. 9 to 11
Case Study in Combining Physical and Computer Experiments
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 3
Estimation of computer model parameters using field data is sometimes attempted while simultaneously allowing for model bias. One paper reports that simultaneous estimation of a bias vector and a scalar calibration parameter, which results in a “calibrated computer model,†can be sensitive to assumptions made prior to data collection. Other papers show that ...
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Authors Dr. Tom Burr, Michael S. HamadaRead Journal Click Here
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Page No. 1 to 7
Fluorescence, in microscopy and imaging
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 3
This is a swift report on fluorescence and its application as a tool in imaging and microscopy; to properly comprehend this subject, with the aid of the Jablonski diagram, brief descriptions and discussions are given on fluorescence; rhodamine 6G homo-FRET reaction is considered from which both the absorption and emission spectra are drawn on a graph. Additionally, the wealth of applicat...
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Authors Dr. P. N. DikediRead Journal Click Here
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Page No. 27 to 31
Geo-electric probe for Groundwater in Giri, Nigeria
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 2
This project report focuses on the relevance of electrical resistivity method in ground water investigations; past research works on the use of this method are mentioned. Geology and hydrogeology of the study area are investigated, an adapted version of the national verification form for provision of potable water, schematic of the Federal Capital Territory (FCT), maps of the drainage pa...
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Authors Dr. patrick dikediRead Journal Click Here
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Page No. 43 to 54
The effect of variation of meteorological parameters on the tropospheric radio refractivity for minna
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 2
This paper investigates the effect of diurnal variations meteorological parameters on the troposheric radio refractivity during dry and rainy seasons for Minna in 2008. The hourly averages of radio refractivity during dry (February) and rainy (August) seasons were calculated from the data obtained from the Center for Basic Space Science (CBSS) through Omini web. This data used for the co...
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Authors Dr. O.N. Okoro , G.A. AgboRead Journal Click Here
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Page No. 37 to 41
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Modelling of Incompressible Elastic Thin Plastic Plate
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 2
The aim of this work to study the asymptotic behavior of an elasticity problem, of containing structure, in incompressible elastic thin oscillating layer of thickness and stiffness depending of small parameter. We use the epi-convergence method to approximate the limit problem modeling. ...
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Authors Dr. M. Verid OULD M. MOULAYE,A. Ait MoussaRead Journal Click Here
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Page No. 13 to 22
Optical, Structural and Morphological Studies of Chemical Bath Deposited Antimony Sulphide Thin Film
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 2
Thin films of antimony sulphide were successfully deposited on glass substrates by chemical bath deposition technique. Morphological studies and structural analysis were performed by scanning electron microscopy (SEM) and x-ray diffraction (XRD) respectively. Optical characterization was done using an AVASPEC-2048 UV-VIS-NIR spectrophoto- meter in the wavelength range of 200-900nm. Optic...
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Authors M.D. JEROH , D.N. OKOLIRead Journal Click Here
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Page No. 1 to 4
Behaviour of Tensile Testing of X-120M Steel from Plate to Line Pipe Due to Bauschinger Effect
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 2
The X-120M ‘V-Nb-Ti-B’ micro alloyed steel of bainitic microstructure used in the experiment having high dislocation density. High dislocation density was due to the nature of Thermo Mechanical Controlled Processing and Accelerated Cooled rolling to achieve the strength level of X- 120 ksi. During the cold forming and mechanical expansion, the deformation o...
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Authors Jai Dev Singh Chandel, Nand Lal SinghRead Journal Click Here
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Page No. 31 to 36
Semi-annual variation of geomagnetic indices for the period of 1970-2009
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 2
Semiannual variations of the geomagnetic disturbances for different geomagnetic activity indices exhibit distinct characteristics for the period of 1970-2009. In this paper, the semiannual variation of geomagnetic activity is significant in the low-latitudinal Dst index showing the magnitude of the ring current, less significant in the midlatitude of Ap and Kp indices. There is no eviden...
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Authors Dr. Falayi, E.O., Rabiu, A.B, Beloff, NRead Journal Click Here
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Page No. 23 to 29
