IOSR-JAP   Volume-2 ~ Issue-6 ~ Nov–Dec 2012

Paper Type	:	Research Paper
Title	:	Estimation of Build-Up of Nuclide during Irradiation by Solving Ode through Adomian Decomposition Method (Adm).
Country	:	Nigeria
Authors	:	Faweya, E.B, Enoch,O, Adesakin ,G.E, Faweya, O
	:	10.9790/4861-0260109
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Abstract: In this work, we considered first order differential equation (FODE) for nuclide build-up during irradiation of Gold (Au) with neutron. The approximate solutions to FODE are obtained using the Adomian Decomposition Method (ADM). Results have been found to be accurate and effective when compared with analytical solutions. Numerical computation was carried out using force.3 software.
Keywords: Adomian, Build-up, Differential equation, Gold, Neutron

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Instrumental Activation Analysis (INAA). Archives of Applied Science Research 3(1): 25-32.
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Paper Type	:	Research Paper
Title	:	Studies on Tensile Properties of Some Plant Fibers
Country	:	India
Authors	:	Gajendra Nath Sarma, Manoranjan Talukdar
	:	10.9790/4861-0261013
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Abstract: The linear density of the raw and degummed plant fibers such as ginger (zingiber officinale), turmeric (curcuma longa) and java galangal (alpinia galangal) fibers has been determined by the use of a Vibromat M. The stress-elongation curves for the fibers were drawn by using a Tensile Tester with electric strain gauges 'Fefegraph' for each of the specimen fiber; at temperature 250 C and 65% R.H. Various tensile parameters have been calculated from the stress-elongation curve obtained by using the Tensile tester with electric strain gauges 'Fefegraph'; and the linear density by a 'Vibromat M'. It is observed that the tenacity is linearly related with the linear density. From various investigations it has been concluded that all the plant fibers in present investigation are hygroscopic in nature and the hygroscopicity does not change due to irradiation and degumming.
Keywords: zingiber officinale, curcuma longa, alpinia galangal, vibromat M, fefegraph, hygroscopicity.

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Paper Type	:	Research Paper
Title	:	Effect of different copper precursor layer thickness on properties of Cu2ZnSnS4 (CZTS) thin films prepared by sulfurization of thermally deposited stacked metallic layers
Country	:	Nigeria
Authors	:	Kasim Uthman Isah, Jibrin Alhaji Yabagi, Umaru Ahmadu, Mohammed Isah Kimpa, Martiale Gaetan Zebaze Kana, Anthony Aghagbudutema Oberafo
	:	10.9790/4861-0261419
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Abstract: Cu2ZnSnS4 (CZTS) thin films were fabricated by sulfurization of thermally evaporated metallic precursors on glass substrates. While the Zinc and Tin thicknesses were kept constant at 300 and 200nm respectively, three Copper layer thicknesses of 100, 150 and 200 nm were used to obtain the metallic precursors. The precursor films were sulfurized for 3 hours at 550 0C with an initial ramping rate of 10 0C/min. X-ray diffraction studies reveal polycrystalline films exhibiting Kesterite structures with preferential orientation along [112] direction. The films with lowest Cu layer thickness exhibited binary metal alloy contents, which disappears with higher Cu precursor layer thickness. The surface morphology and elemental composition of CZTS thin films was determined from scanning electron microscopy and energy dispersive spectroscopy analysis respectively. The grain size become large with increasing Cu/(Zn + Sn) ratio, exhibiting an enhancement of the grain growth under Cu – rich condition. There is a nominal increase in the optical band gap from 1.49 to 1.51 eV with increase in Cu content. The samples resistivities are in the range of 0.8 to 1.5Ωcm
Keywords: CZTS, Sulfurization, Thermal evaporation. XRD, SEM.

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technique, Thin Solid Films, 51(15), 2007, 5949–5952
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[9] F. Liu, Y. Li, K. Zhang, B. Wang, C. Yan, Y. Lai, Z. Zhang, J. Lie and Y. Lu, In situ growth of Cu2ZnSnS4 thin films by reactive
magnetron co-sputtering, Solar Energy Materials and Solar Cells, 94(12), 2010, 2431–2434.
[10] Q. Guo, H. W. Hillhouse and, R. Agrawal, Synthesis of Cu2ZnSnS4 nano crystal ink and its use for solar cells, Journal of the
American Chemical Society, 131(33), 2009, 11672–11673.

Paper Type	:	Research Paper
Title	:	Critical Current Density Enhancement in High Temperature Superconductors by Flux Pinning
Country	:	India
Authors	:	Manzoor A. Malik
	:	10.9790/4861-0262021
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Abstract: Technological applications of High Temperature Superconductors (HTSC) are limited by "Flux Creep", an undesired magnetic vortices movement, creating a pseudo-resistance that depresses both critical current density and critical field. For practical applications (like energy storage systems, current limiters, magnetic bearings, etc.), it is desired to have high values of Critical Current Density (JC) even at higher applied field. Flux Pinning is an established mechanism of enhancing JC in HTSC by Swift Heavy Ion irradiation. This paper explains as to how JC can be enhanced in HTSC and thereby make HTSC technologically more useful. Some recent works and our initiatives in this direction are also discussed.
Keywords: Superconductivity, High temperature, Transport properties, Critical Currents, Flux Pinning

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