Journal of Ultra Scientist of Physical Sciences - B
Voulume: 29
Issue: 10
Article No. 1
Geomagnetic Storm Effects on Drift and Anisotropy Parameters of Ionospheric Irregularities in the E-region at Waltair
V.A. RAO (
Professor, Deptt. of Physics College of Natural Sciences Jimma University (Ethiopia)
Profesors, Departt. of Physics Andhra University Visakhapatnam (India)
Profesors, Departt. of Physics Andhra University Visakhapatnam (India)
Abstract :

The variation of drift and anisotropy parameters of Ionospheric irregularities in the E-region at Waltair (dip 17.7oN; 83.3o E) during 3 geomagnetic storms has been studied mainly to resolve the controversy that has been reported in the literature about the effect of magnetic activity on the drift and anisotropy parameters. E-region spaced antenna drift records taken on frequency 2.4 MHz during the period September 1983-May 1984 at Waltair are used in the present study. In the E-region, the true drift velocity during storm period appears to be larger than the control day values. The ratio of Va/V shows a gradual decrease during storm period and random velocity during storm time is quiet less compared to the control day values. No significant variation is observed in the apparent drift direction and structure size on storm days with respect to the control days. The orientation of the semi-major axis mostly lies in the range of 120o – 150o N of E, both on storm days as well as on control days but the average value of the axial ratio shows a higher value compared to the average on control days.

Keyword : Close spaced receivers, Ground diffraction pattern, Geomagnetic activity, Ionospheric irregularities, Geomagnetic storms
Paper Download Count : 451
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Article No. 2
A Study of Optical Properties of Green Synthesized ZnO/CdS Core/Shell Nanopins for Photosensor Application
Department of Physics, CMR Technical Campus, Hyderabad (India)
Department of Physics, Malla Reddy College of Engineering & Technology, Hyderabad (India)
Abstract :

ZnO nanoparticles and ZnO/CdS Core/Shell heterostructures have been prepared in the two-step hydrothermal method by using Starch as a capping agent. The tunability of the optoelectronic properties of ZnO/CdS can enhance the exciton life time. These type of Core/Shell nanostructures are coming under Type-II band alignment. The thickness of the shell CdS is varied, keeping the core ZnO nanopins are in the same sizes. The absorption and luminescence properties of ZnO/CdS Core/Shells are well studied. The longer exciton life time of these Type-II Core/Shell nanostructure could be beneficial for the potential application in Photosensor.

Keyword : Heterostructures, Shell Thickness, Absorption, Luminescence Properties
Paper Download Count : 404
View Count : 516
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Article No. 3
Stiff Fluid Distribution with Variable G and  Assuming Power Law Relation in Bianchi type V Viscous Cosmological Model
Department of Mathematics, JECRC University, Jaipur, Rajasthan-303905, India
Abstract :

We have investigated Bianchi Type V stiff fluid cosmological model with variable gravitational and cosmological constant. To get the exact solution it is assumed that equation of state is P = p – 3  H, =p, where  = 0 h, p is the isotropic pressure,  is the coefficient of shear viscosity, H the Hubble constant, 0 and h are taken as constants. A, B and C are assumed as the functions of cosmic time t using power law relation. Some other physical and geometrical aspects of the model are also discussed in terms of cosmic time t.

Keyword : Bianchi type V universe, viscosity, stiff fluid, Hubble parameter variation, variable G and uf04c
Paper Download Count : 369
View Count : 455
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Article No. 4
Studies on static-cosmological model
Department of Mathematics, C.V. Raman College of Engineering, Bhubaneawar-752054 (India)
Abstract :

The Cosmological principle is the hypothesis that the universe is spatially homogeneous and isotropic. In the study of cosmological model, the Einstein field equations and construct a static model of the universe. A method has proposed by Berman 1991 3 on the basis of the conservation law, to incorporate the variable Gravitational constant ‘G ’ and Cosmological constant ‘  ’ in the Einstein field equations. The solutions are obtained by choosing suitable values for the constant  and  , a number of cosmological models may be constructed and the validity of these models may be tested on the theoretical and observational grounds.

Keyword : Cosmological model, perfect fluid, static model, variable cosmological, gravitational constants, MSC Classification number: 83C05, 83F05
Paper Download Count : 445
View Count : 505
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Article No. 5
Simulation of Co-axial Carbon Nanotube Field Effect Transistor (CNTFET) using Nanohub
Department of Electronics, D.D.U. Gorakhpur University, Gorakhpur-273009 (India)
Department of Computer Science, D.D.U. Gorakhpur University, Gorakhpur-273009 (India)
Department of Electronics, D.D.U. Gorakhpur University, Gorakhpur-273009 (India)
Abstract :

In this paper, the design and simulation of cylindrical, co-axial, Carbon Nanotube Field Effect Transistor (CNTFET) is presented using online Fettoy tool of Nanohub. This tool can provide various characteristics of CNTFET, like transfer characteristics, output characteristics, average velocity vs. gate voltage etc. To simulate the CNTFET we have considered the value of diameter of carbon nanotube 1nm which is of (13,0) chirality. Gate insulator thickness is taken as 1.5nm and the dielectic constant of the material used as gate oxide is k=20 , which is the value shown by ZrO2.

A comparison between designed CNTFET and conventional MOSFET shows improvement of various parameters which plays a significant role in design of logic circuits. With these improved properties of CNTFETs it can be concluded that it is very useful in designing of reversible logic circuits. Also, it is very efficient in terms of power consumption, speed of operations, and leakage current over conventional MOSFETs

Keyword : Carbon Nanotube, Field effect transistor, Simulation, FETToy
Paper Download Count : 438
View Count : 596
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Article No. 6
Experimental studies on the changes in the female gonad of immature and mature freshwater fish, Heteropneustes fossilis (Bloch)
Research Scholar , House no. 94, Pushpakunj Mau Road, Khandari, Agra (India)
Asstt. Prof., Deptt. of Zoology, MJRP University, Jaipur (Rajasthan), (India)
Professor and Head, Deptt. of Zoology, Saifia Science College, Bhopal (M.P.) (India)
Abstract :

The present paper deals with the study of amino acids and lipid concentration in the immature and mature oocyte in the fish Heteropneustes fossilis .It was observed that the essential amino acids under the influence of gonadotrophins play a vital role in the gonadal maturation as well as in the synthesis of various enzymes needed for steroidogenesis. In the present study, the rate of incorporation of amino acids and their transformation in gonads indicate their vital role in the maturation of gonads. In addition to amino acids, the lipid fraction especially the ester cholesterol and the phospholipid were also found to play a significant role during the sequential changes which occur during maturation process of the gonads of Heteropneustes fossilis.

Keyword : amino acids, Heteropneustes fossilis, steroidogenesis, fish
Paper Download Count : 461
View Count : 502
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Article No. 7
Synthesis and physicochemical characteristics of Nickel (II), Copper (II), Zinc (II), Cadmium (II) and Tin (II) complexes of schiff base with 1, 2, 4-triazole
Department of Chemistry, Janta Vidya Mandir Ganpat Rai Rasiwasia (J.V.M.G.R.R.) P.G. College, Charkhi Dadri, Haryana (India)
Department of Chemistry, Agra College, Agra, U.P., (India)
Department of Chemistry, Agra College, Agra, U.P., (India)
Head Department of Chemistry, B K Birla Institute of Engineering and Technology, Pilani, Rajasthan, (India)
Abstract :

The extreme efforts have been developed to design novel compounds to strains of resistant microorganisms. On-going search for novel and amazing drug delivery systems is primarily impact of the wellestablished fact that the convectional dosages are not sufficiently effective in conveying the drug compounds to its site of action and this has required the need to search for more efficient drugs. New five metal complexes of Nickel(II), Copper(II), Zinc(II), Cadmium(II) and Tin(II) with Schiff base ligand 4-(Benzylidene-amino)- 5- pyridin-4-yl-4H-[1,2,4] triazole-3-thiol were synthesized in ethyl alcohol as a solvent. The Synthesized compounds were characterized by different physicochemical techniques such as, elemental analysis C.H.N.S, FT-IR, UVvisible spectrophotometry, 1H NMR, conductivity and magnetic susceptibility measurements melting point, flame atomic absorption. The Schiff base ligand act as bidentate and coordinated to the metal atoms via the azomethine-N and S atom of thiol group. From the spectral studies, square planar geometry was proposed for the copper complex. The other complexes were proposed to be tetrahedral.

Keyword : Metal complexes, Schiff base, bidentate, 1,2,4-triazole
Paper Download Count : 350
View Count : 507
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Article No. 8
Bounds of the Group of Automorphisms of Compact Riemann Surface With Reference To The Point Group of Sulphur Molecule
Department of Mathematics, Devi Charan Barua Girlsu2019 College, Jorhat-785001 (India)
Department of Mathematics, Jorhat Institute of Science & Technology, Jorhat-785010 (India)
Abstract :

It is observed that every finite group is isometric to the group of Automorphisms of some Compact Riemann surface of genus 􀝃(≥ 2). Also found that the group of symmetries of a non-linear molecule (point group) is an excellent example of finite groups. In this paper we have considered the point group of Sulphur molecule S8 , which is a group of order 16. Then we prove that the bounds of the order of symmetry group of Automorphisms of Compact Riemann Surface on which the point group of S8 acts as a group of Automorphism is 4(g1), and the corresponding minimum value of g is 5, associated Fuchsian Group of signature is (2,2,2,2,2).

Keyword : Compact Riemann Surface, Fuchsian Group, Genus, Group of Automorphisms, Point group, 1991 Mathematics Subject Classification: 20H10, 30F10, 05C10
Paper Download Count : 365
View Count : 505
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Article No. 9
Two warehouses Inventory Model with Stock-dependent demand and Maximum life time
Associate Professor, Department of Mathematics, B.K. Birla Institute of Engineering & Technology, Pilani, Rajasthan (India)
Research Scholar, Department of Mathematics, Singhania University Pacheri badi, Jhunjhunu Rajasthan, (India)
Associate Professor, Department of Mathematics, D.N. PG College, Meerut, U.P. (India)
Abstract :

In this paper, a two warehouses inventory model with stock-dependent demand has been studied. In case there is limited capacity of the owned warehouse (OW), another warehouse is used named rented warehouse (RW) for large ordered quantity. The deterioration rate of inventory items is different in both the warehouses. In the case of OW, we allow for shortages and consider the time dependent backlogging rate. To achieve the optimal ordered quantity and the optimal interval for the total inventory cost, a solution procedure is established and it concludes the developed model with further extended environments.

Keyword : Inventory, rented warehouse, own warehouse, backlogging rate, maximum life time
Paper Download Count : 336
View Count : 517
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