IOSR-JAP   Volume-9 ~ Issue-3 ~ May-June 2017

Paper Type	:	Research Paper
Title	:	Impact of Harmattan Sun and Dust of the Eye in a Nigeria City
Country	:	Nigeria
Authors	:	R.O.K. Meindinyo || M.C. Misra || R.C. Orji
	:	10.9790/4861-0903010106

ABSTRACT: This work reports Studies that were carried out to investigate the impact of harmattan sun and dust on the eye. These includes ocular media absorbance, ocular related disease incidence, Sun intensity and amount of atmospheric dust during harmattan and non harmattan periods in Jos Nigeria. This is because the eye is the essential organ of sight. It functions by way of refraction of light (from objects) by the refracting media (the cornea, aqueous and vitreous humours and the lens) onto the retina. The brain which is connected to the eye through the optic nerve does the interpretation. Vision loss/blindness could result if any these parts fails to function from damage.............

Keywords: Harmattan sun, Dust, Human eye

[1]. N. Minka, (2016). Effect of Cold-Dry (Harmattan) and Hot –Dry Seasons.
[2]. BN. Okeahialam, (2016).The cold Dusty Harmattan
[3]. R.R Burton,(2013). The harmattan over west Africa: nocturnal structure and frontogenesis.
[4]. A.M.Kundril,(2008). Constitute composition of harmattan dust and its influence on properties of fadama soils in semi arid.
[5]. OA. Ogunseitan, (2007). Harmattan Haze and Environmental Health.
[6]. Mcgrow-Hill: Encyclopedia of Science and Technology. (1971) vol.5 770 volume 3 Pg 32o

Paper Type	:	Research Paper
Title	:	Radiation Dose Effect of Thermo luminescence on γ-Al2O3: C
Country	:	Nigeria
Authors	:	Aligba, E. H. || Akaagerger, B. N. || Iortile, J. T.
	:	10.9790/4861-0903010710

ABSTRACT: This study aims to investigate the effects of radiation dose on the TL of γ-Al2O3:C.The material was exposed to beta radiation using the Risø TL/OSL-DA-15 Reader equipped with a 90Sr/90Y beta irradiator. The luminescence signals were measured by initially heating the samples at a heating rate of 5oC/s from room temperature (RT) to 500oC following β-irradiation and the glow curves, dose response determined respectively. The sample, doped with 1.0g of carbon graphite showed clear TL peaks at 256, 254, 242, and 244oC at 0.5Gy, 1.0Gy, 5.0Gy and 10.0Gy respectively. Dose response curve analysis showed a linear response in the dose range from 0.5Gy to 10Gy. With the results obtained, it can be concluded that the TL of γ-Al2O3:C increases with increase in radiation dose and this indicates that this material is suitable for personnel dosimetric applications.

Keywords: γ-Al2O3:C, Thermo luminescence, radiation dose, heating rate, glow curves, personnel

[1]. C. Cosma,A.Timar, V. Bene, I. Pop, T. Jurcut, Ciorba, D. Using Natural Luminescent Materials and Highly Sensitive Sintered Dosimeters MCP-N(LiF:Mg,Cu,P) in Radiation Dosimeter. Journ. Optoelect. Advanc. Materials,10 (3), 2008, No. 3, 573-577.
[2]. E. J. Hall, and D. J. Brenner, Cancer Risks from Diagnostic Radiology. The British Journal of Radiology, 2008, 81,362-378
[3]. M. C.Aznar, Real-time In vivo Luminescence Dosimetry in Radiotherapy and Mammography using Al2O3:C. Published Ph. D. Thesis, Riso National Laboratory, Roskilde, Denmark.2005.
[4]. M. S. Akselrod, and V. S. Kortov, (1990). Thermoluminescent and Exoemission Properties of New High Sensitivity TLD α-Al2O3:C Crystals. Radiat. Prot. Dosim. 66, 105-110.
[5]. F. D.G.Rocha, and L. V.E.Caldas, Characterization of Al2O3 Sintered Pellets for Dosimetric Applications in Radiotherapy. Journ. Radiol. Prot. 19(1), 1999, pp51-55 UK.

Paper Type	:	Research Paper
Title	:	Thermal Noise Analysis of Switched Capacitor Networks
Country	:	India
Authors	:	Sandip Kumar Pan
	:	10.9790/4861-0903011113

ABSTRACT: Thermal noise is one of the most important challenges in analogue intergrated circuits design. This problem is more critical in switched capacitor (Sc) filters due to the aliasing effect of wide band thermal noise. In these circuits, switching introduces a boost in the power spectral density of the thermal noise due to aliasing. Unfortunately, even though the theory of noise in Sc circuits is discussed in the literature, it is very tedious and requires highly sophisticated and not widely available software. The purpose of this paper is twofold. It provides a tutorial description of the physical phenomena taking place in anSc circuit while it processes noise............

[1]. D.A. Johns and K. Martin, Analog integrated circuit Design. New York, Wiley, 1997.
[2]. C. Enz and G.C. Temes, "Circuit techniques for reducing the effects of op-amp imperfections. Autozeroing, Correlated double
sampling, and chopper stalization," Proc. IEEE, vol. 84, No. 11, PP. 1584-1614, Nov. 1996.
[3]. R. Gregorian and G.C.Temes, Analog MOS Integrated Circuits for signal processing. New York. Wiley, 1986, Sec 7.4
[4]. R. Schreier and G.C Temes, Understanding Delta Sigma Data Converters, Piscataway, NJ: JEEE Press/Wiley, 2005. Appendinc.
[5]. J. Stecusgard, "Noise sources in switched capacitor delta sigma modulators", in Lecture Notes for "Practical Approach to Delta
Sigma Design, Lansanne, Switzerland, Jan. 21-25, 2004 [online]

Paper Type	:	Research Paper
Title	:	Variation of Bulk and Particle Thermal Properties of Some Selected Wood Materials for Solar Device Applications
Country	:	Nigeria
Authors	:	Oluyamo, S. S. || Aramide, T. M. || Adekoya, M. A. || Famutimi, O. F
	:	10.9790/4861-0903011417

ABSTRACT: The study examines the variation of thermal properties of bulk and particle of three different wood species: Pterygotamacrocarpa, Miliciaexcelsa and Celtisphillipensisof the families of Sterculiaceae, Moraceae and Ulmaceae.The particle samples were moulded to appropriate disc shape using modified hydraulic press mould while the bulk samples were turn into disc shape using circular saw machine. The results showed that thermal conductivity of the selected wood materials changed with particle sizes.Bulk samples have higher thermal conductivity values than the particles for all the wood species.Among the particle sizes, 300 μm has the highest thermal conductivity value compared with 600 μm and 850 μm respectively................

Keywords: Wood materials, thermal conductivity, solar device, Lee's disc.

[1]. Ayugi, G., Banda, E. J. K. and D'Ujanga, F. M. (2011). Local Thermal Insulating Materials for Thermal Energy Storage
Department of Physics. .Makerere University, Kampala, Uganda, Rwanda Journal, 23:21-29.
[2]. Duncan, M. P. and Mark, J. (2000) Thermal Conductivity of PTFE and PTFE Composites' IPTME.Loughborough University,
Loughborough, UK. Pp. 580-581
[3]. Griffin, J. J. and George, J. (2002). Lees' Conductivity Apparatus (Electrical Method) LL44-590 S. 1122/7302, Griffin & George
Ltd., Wembley, Middlesex UK. Pp 2-4
[4]. Ken, F. (2014). Useful Tropical Plants. Database web interface
[5]. Oluyamo, S. S. and Adekoya, M. A. (2015). Effect of Dynamic Compression on Thermal Properties of Selected Wood Products of
Different Particle Sizes. International Research Journal of Pure and Applied Physics 3: 22-29.

Paper Type	:	Research Paper
Title	:	Preparation and Characterization of (PVA+ZnO) Polymer Films Doped With Cu2+ Ions
Country	:	India
Authors	:	Ch. Rani || S. Hima Bindu || M. Hemalatha || Ch. Linga Raju
	:	10.9790/4861-0903011824

ABSTRACT: 5 mol% (PVA+ZnO): (x mol%) Cu2+ ions doped polymer films were prepared by solution casting technique. The obtained films are analyzed using different characterization techniques like SEM, FTIR, optical and EPR. The SEM micrographs shows the improvement in the crystallinity of the Cu2+ doped PVAZn polymer films compared with the pure PVAZn film. The Fourier transform infrared spectroscopy (FTIR) spectrum shows a characteristic peaks of C-H, C=C, CH2 and C-O bonds. The optical absorption spectrum exhibits broad bands at 412 nm and 692 nm, which were corresponds...............

[1] Ch. Linga Raju, J.L. Rao, B.C.V. Reddy and K.Veera Brahmam, Bull Mater. Sci., 30 (3) ( 2007) 215-218.
[2] Hongtao Fan, Yuqian Bian, Dianpeng Sui, Guifeng Tong and Ting Sun, Aalytical Sciences, 25 (2009) 1345-1349.
[3] Seon Jeong Kim, Seonng Gil Yoon, Young Moo Lee and Sun I Kim, Sensors and Actuators, B-88 (2003) 286-291.
[4] I. Latif, Entisar E, AL-Abodi, Dhe faf H. Badri and Jawad AI Khafagi, American Journal of Polymer Science, 2(6) (2012)135-140.
[5] Tapas Kumar Kundu,Nantu Karak, Puspendu Barik, Satyajit Saha International Journal of Soft computing and Engineering (IJSCE). 1 (2011) 2231-2307.

Paper Type	:	Research Paper
Title	:	Exact Solution of the relativistic Schroedinger equation for the central potential V(r)=(-a/r + b/√r)
Country	:	India
Authors	:	Dr. V.K. Srivastava || Prof. S.K. Bose
	:	10.9790/4861-0903012527

ABSTRACT: A set of exact solutions of the relativistic Schroedinger equation for central potential ) , where a and b are parameters of the given potential are to be obtained by using a suitable ansatz. For each solution, a separate relation interrelating the parameters of the potential and the orbital angular momentum quantum no. . The eigenfunctions obtained here are normalizable. The fractional power potential is relevant in connection with quark model of hadrons and some other branches of physics like particle and nuclear physics.

Keywords: Schroedinger equation, fractional Central potential, Exact solution.

[1]. Singh V, Biswas S N and Datta K, Phys Rev., 18D (1978) 1901
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Paper Type	:	Research Paper
Title	:	Study the Effect of Doping with Chromium Chloride on Silica Aerogel Properties Prepared with Ambient Pressure
Country	:	India
Authors	:	Israa F. Al-Sharuee || Wesam A A Twej
	:	10.9790/4861-0903012832

ABSTRACT: Hydrophobic silica aerogel have been prepared through two step acid-base catalysis recipe, via ambient pressure drying method. tetraethylorthosilicate was used as precursor, and trimethylchlorosilan as surface modifier. Three adopted molar concentrations of Chromium chloride are used; 0.019, 0.032, 0.051 [M]. In this paper the molar ratio of chemicals; precursor, alcohol and catalyst, was kept constant at (1:8.6:0.23) respectively. The hydrophobic property were obtained by socking the final gel in trimethylchlorosilan -hexane solution at 6 wt. % of modifier in hexane.............

Keywords: Chromium chloride, ambient drying, contact angle, doping, oxidation.

[1]. M. A. Aegerter, N. Leventis, and M. Koebel, "Advances in sol–gel derived materials and technologies," ed: Springer, 2011.
[2]. D. Gu and F. Schüth, "Synthesis of non-siliceous mesoporous oxides," Chemical Society Reviews, vol. 43, pp. 313-344, 2014.
[3]. H.-x. Shi, J.-t. Cui, H.-m. Shen, and H.-k. Wu, "Preparation of silica aerogel and its adsorption performance to organic molecule," Advances in Materials Science and Engineering, vol. 2014, 2014.
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Paper Type	:	Research Paper
Title	:	Dielectric Characteristic of a Glycerol and a Globular Protein in Solution
Country	:	Nigeria
Authors	:	Meindinyo R.O.K || Laogun A.A
	:	10.9790/4861-0903013339

ABSTRACT: The dielectric dispersion of a glycerol (lipid) and a globular protein casein (the most abundant protein in milk) have been investigated by means of a resonance technique over the frequency range 0.1 ± 50 MHz for three concentrations and at a mean room temperature of 24 0.50C.The study revealed that casein exhibited beta-dispersion and has while the glycerol did not. The dielectric parameters of the protein like the dielectric increment, relaxation frequency and relaxation time show some dependence on concentration, and the sample studied displayed more than a single relaxation time indicating that the Cole-Cole structural model is better than the single Debye model in explaining its structural properties..........

Keywords: Biomolecules, Protein, Lipid, Dielectrics.

[1]. Burubai, W., Meindinyo, R.O.K(2013), Effect of moisture and frequency variations on the dielectric properties of Africa nutmeg (monodoramyristica) seeds.
[2]. Burubai, W. Dagogo G.W, Meindinyo R.O.K,(2012) Strain energy variability as a function of moisture content, preheating temperature and loading rate on African nutmeg seed during cracking.
[3]. Henry, F., L. Costa, and F. Lakkis. 2003. Free and/or bound water by dielectric measurements. Food chemistry.
[4]. Afzal, A,S. Mousavi, and M.Khademi. (2010). Estimation of leaf moisture content by measuring content by measuring the capacitance.
[5]. Anderson, J. C. (1967): Dielectrics (London: Chapman and Hill Ltd.): PP 15-19, 49-50.

Paper Type	:	Research Paper
Title	:	Strong Absorption model for the studying of Pion-Nuclei Elastic Scattering
Country	:	Bangladesh
Authors	:	Rony Mallick || Dr. Dipika Rani Sarker
	:	10.9790/4861-0903014046

ABSTRACT: The angular distribution of pions, elastically scattered from a number of nuclei between 6Li and 118Sn are studied in terms of the strong absorption model of Frahn and Venter[1-2] using the three parameters version of this model .We find that a reasonably good description to the angular distribution of experimental elastic scattering data is possible. The best fit parameters of the model are the cut-off angular momentum Λ, the rounding parameter  and the real nuclear phase shift μ..............

Keywords: Nuclear reactions and scattering, optical and diffraction model, elastic pion scattering.

[1]. W.E. Frahn and R.H. Venter Ann. Phys (N.Y.), 24, 243(1963).
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Paper Type	:	Research Paper
Title	:	Calculation and Characterization of the EEJ Current Density from Ground-Based Magnetometer Data Using Ampere's Law
Country	:	Ethiopia
Authors	:	Lamessa Abebe || Gebeyehu Dirbeba
	:	10.9790/4861-0903014753

ABSTRACT: In this study, we characterized an empirical model of the equatorial electrojet (EEJ) current density from ground-based magnetometer data using Ampere's law. An analysis was carried out using the equatorial electrojet current, calculated from the geomagnetic northward ΔH component. The result showed that the EEJ component derived from the model exhibits a similar pattern with measured EEJ from ground data during noontime, mainly before 1300 LT. For different months, the EEJ current density follows the same basic pattern. The EEJ is mostly observed close to local noon, when the E-region conductivity peaks. For this reason, only data from 6:00-18:00 LT are included in this study..............

Keywords: Equatorial electrojet (EEJ), EEJ current density, EEJ-field, Magnetometer Data, Ampere's Law

[1]. Alken P, Maus S (2007) Spatio-temporal characterization of the equatorial electrojet from CHAMP, Ørsted, and SAC-C satellite magnetic measurements. J Geophys Res 112:A09305.

[2]. C.A. Onwumechili, P.O. Ezema Latitudinal and vertical parameters of the equatorial electrojet from an autonomous data set, Journal of Atmospheric and Terrestrial Physics Volume 54, Issues 11–12, 1992, Pages 1535-1544

[3]. Chandrasekhar N, Arora K, Nagarajan N (2014) Evidence of short spatial variability of the equatorial electrojet at close longitudinal separation. Earth Planets Space 66:110

[4]. Chapman S (1951) The equatorial electrojet as detected from the abnormal electric current distributions above Huancayo, Peru, and elsewhere. Arch Meteorol Geophys Bioclimatol A4:368–390

[5]. Doumouya V, Cohen Y (2004) Improving and testing the empirical equatorial electrojet model with CHAMP satellite data. Ann Geophys 22:3323–3333

Paper Type	:	Research Paper
Title	:	Growth, Characterization and Comparison of Zirconia-Graphite Ceramic Carbon Composites
Country	:	India
Authors	:	Veena Kumari || Soni Rani || Dharvendra Singh
	:	10.9790/4861-0903015458

ABSTRACT: The density of ZrO2 ceramic carbon composites prepared by the conservative solid sintering technique is as close to any commercially available ZrO2. The Vicker's hardness as well as modulus of the sample with 1400°C high temperatures treated, is quite high compared to the lower 1200°C HTT samples. From S1 to S6 on comparison, it is found that porosity for S6 is minimum and maximum for S1. After comparing with ceramic monolith the flexural strength and modulus shows a remarkable improvement in its value. The average grain size measured from the width of the x-ray peaks, the information highlighted..............

Keywords: Ceramic Composites; Porosity; Vicker's hardness; X-ray; micrographs

[1]. C. Piconi and G. Maccauro, Zirconia as a ceramic biomaterial, Biomaterials, 20 (1), 1999, 1–25.
[2]. A. R eckziegel, Properties and applications of high-performance ceramics made of zirconia, technical paper, Friatec, Revision, 2015.
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[4]. Q. L Ge, T. C Lei, J. F Mao and Y. Zhou, In situ transmission electron microscopy observations of the tetragonal-to-monoclinic phase transformation of ZrO2 in A12O3-ZrO2 composites; J. Mat. Sc. Lett., 12, 1993, 819.
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Paper Type	:	Research Paper
Title	:	Extended Field Theory. New axioms, Laws and consequences
Country	:	Bulgaria
Authors	:	Dr. Valentina Markova
	:	10.9790/4861-0903015966

ABSTRACT: The present study attempts to expand the Theory of the Electromagnetic Field to a more general Theory of the Field that also includes the gravitational field. It is known that Maxwell's laws (1864) are based on a single axiom which states that the even movement of a vector E leads to movement in a closed loop (div rot E = 0). The author replaces this axiom with a new one, according to which the uneven movement of a vector E leads to an open loop (div rot E ≠ 0) or an open uneven vortex (div Vor E ≠ 0). The derived 2 axioms and 10 laws lead to the following results: even movement is replaced with uneven movement..............

Keywords: Gravitational field, Even rotor, Maxwell's laws, Theory of the Electromagnetic Field, Uneven vortex.

[1]. L.D.Landau ,E.M. Lifshitz ,The Classical Theory of Fields ( Volume 2 of A Course of Theoretical Physics ) ,4 Edition., Butterworth-Heinemann,1975.
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[3]. V.Markova, three space times obtained by combined vortex movements, International Journal оf Current Research, vol.8, iss. 9, p.37826-37832, 2016.
[4]. L.Ting, , Viscous Vortical Flows,( Lecture notes in physics, Springer-Verlag, 1991)
[5]. V.Markova, A method of movement at a speed greater than the speed of the light, 15-th Conference"Aviation and Cosmonautics", MAI, Moscow, 2016. 8 pages

Paper Type	:	Research Paper
Title	:	Effects of the deformation orders β6 & β8 on the fusion parameters for spherical-deformed interacting pair
Country	:	Egypt
Authors	:	M. Ismail || Maher H. Wasfy || I.A.M. Abdul-Magead || I. M. Kandil
	:	10.9790/4861-0903016781

ABSTRACT: We investigated the effect of the deformation orders β6 & β8 on the fusion barrier parameters (namely; Coulomb barrier VB and its radius RB), using two methods the double folded model (DFM) using M3Y Reid nucleon-nucleon (NN) interaction with the zero range exchange term and proximity approach (PROX) which is composed of proximity 2000DP for calculating the nuclear part and Denisov potential for Coulomb part. It was found that PROX shows some abnormalities in the effect of the deformation order β6 & β8 on orientation dependence of the fusion barrier parameters.

Keywords: Deformation order, fusion barrier parameter, double folded model, proximity approach and spherical deformed.

[1]. A.J.BALTZ, B.F.BAYMAN. PROXIMITY POTENTIAL FOR HEAVY ION REACTIONS ON DEFORMED NUCLEI. PHYSICAL REVIEW C, 26:1969-1983, 1982.

[2]. Deepika Jain, Raj Kumar, Mano jK.Sharma. Effectof deformation and orientationon interaction barrier and fusion cross-sections using various proximity potentials. Nuclear Physics A, 915:106-124, 2013.

[3]. Deepika Jain, Raj Kumar, Manoj K.Sharma. Effect of deformation and orientation on interaction barrier and fusion cross-sections using various proximity potentials. Nuclear Physics A, 915:106-124, 2013.

[4]. G.R. Satchler, W.G. Love. Folding Model Potentials from Realistic Interactions for Heavy-ion Scattering. Physics Reports, 55:183-254, 1979.

Paper Type	:	Research Paper
Title	:	Comparaison of the Optical Anisotropy of Corrugated and Non-Corrugated (311) Superlattices
Country	:	Morocco
Authors	:	Abdelaziz Hallaoui || Hafida Essaoudi || Abdelouahed Essahlaoui
	:	10.9790/4861-0903018291

ABSTRACT: We report the electronic and optical properties of corrugated and non-corrugated (311) (GaAs)/(AlAs) superlattices using the tight-binding method. These systems grown by molecular beam epitaxy on (311) GaAs oriented substrates. We present the valence and conduction band dispersion relations (band structures) for the corrugated (311) (GaAs)16/(AlAs)16 superlattice. We have studied the probability densities of the lowest conduction band and highest valence band interband transition probabilities of the non-corrugated (311) (GaAs)8/(AlAs)8 superlattice and the corrugated (311) (GaAs)16/(AlAs)16 superlattice.............

Keywords: Anisotropy rate - Corrugated superlattice - Interband transition probability - Non-corrugated superlattice - Probability density.

[1] X. Duan, Y. Huang, Y. Cui, J. Wang, and C.M. Lieber, Indium phosphide nanowires as building blocks for nanoscale electronic and
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Paper Type	:	Research Paper
Title	:	New Idea on Exact Solution of the Non Relativistic Schroedinger Equation for a Sextic Potential
Country	:	India
Authors	:	Dr. V.K. Srivastava || Prof. S.K. Bose
	:	10.9790/4861-0903019294

ABSTRACT: A useful generalization of an ansatz used to solve non relativistic Schroedinger equation for sextic potential of physical interest such that we obtain a class containing an infinite number of exact solutions for the given potential of physical importance. The exact solution may be used to get the accuracy and the reliability of numerical methods of solving Schroedinger equation.

Keywords: DAnsatz, Schroedinger equation, sextic potential and exact solution

[1]. Agrawal R K and Varma V S , Phys. Rev. A, 48 (1993) 1921
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Paper Type	:	Research Paper
Title	:	Piezoelectricity in PVDF and PVDF Based Piezoelectric Nanogenerator: A Concept
Country	:	India
Authors	:	Binoy Bera || Madhumita Das Sarkar
	:	10.9790/4861-0903019599

ABSTRACT: Polyvinylidene fluoride or simply PVDF is one of the most important semicrystalline polymers which generate piezoelectricity when a pressure or mechanical force applied on it. It has four crystalline phases α, β, ɣ and δ depending on the chain conformation structure. Among them α is non polar phase and β and ɣ are polar phase. Piezoelectricity in PVDF arises due to the β and ɣ phase formation. Several materials have been introduced for the preparation of nanogenerator. Among them PVDF (polyvinylidene fluoride) is most interesting material used in nanogenerator preparation due to its flexibility, bio- compatiable, nontoxic in nature..............

Keywords: PVDF, nanogenerator, piezoelectricity, β phase, electrospinning, electroactive phase, Poling process

[1]. Zhang, Q. M., Bharti, V., Kavarnos, G., Schwartz, M. (Ed.), (2002). "Poly (Vinylidene Fluoride) (PVDF) and its Copolymers", Encyclopedia of Smart Materials, Volumes 1–2, John Wiley & Sons, 807–825.

[2]. Kawai, Heiji (1969). "The Piezoelectricity of Poly (vinylidene Fluoride)". Japanese Journal of Applied Physics. 8 (7): 975.

[3]. Lolla, Dinesh; Gorse, Joseph; Kisielowski, Christian; Miao, Jiayuan; Taylor, Philip L.; Chase, George G.; Reneker, Darrell H. (2015). "Polyvinylidene fluoride molecules in nanofibers, imaged at atomic scale by aberration corrected electron microscopy". Nanoscale.

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Paper Type	:	Research Paper
Title	:	Magnetohydrodynamic Boundary Layer Slip Flow and Heat Transfer over a Flat Plate with Heat Generation/Absorption and Viscous Dissipation
Country	:	Ethiopia.
Authors	:	Okey Oseloka Onyejekwe
	:	10.9790/4861-090301100110

ABSTRACT: A numerical study has been carried out on the momentum and heat transfer characteristics of an incompressible magnetohydrodynamic boundary layer slip flow over a flat plate with both viscous and ohmic dissipations. Momentum boundary layer equation takes care of the magnetic field while the ohmic and viscous dissipations are accounted for by the thermal boundary layer equation. The governing equations constitute highly non-linear momentum and thermal boundary layer equations. Both are converted into similarity equations before being solved by the Runge-Kutta-Fehlberg technique with shooting.............

Keywords: Magnetohydrodynamic fluid, boundary layer flow, viscous and ohmic dissipations, nonlinear, slips velocity parameter, magnetic parameter

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Paper Type	:	Research Paper
Title	:	Studies of Glycine Guanidine Nitrate single crystals In the Aqueous Solution of α-Glycine and Guanidine Nitrate
Country	:	India
Authors	:	D. Arul Asir Abraham || U. Sankar || S. Perumal || P.Selvarajan
	:	10.9790/4861-090301111116

ABSTRACT: The field of nonlinear optics became practically a reality after the invention of laser. High Performance electro-optic switching elements for telecommunications and optical information processing are based on materials with high nonlinear optical (NLO) properties. The development and encroachment of high technology, from transportation, computation to information is based on the availability of materials in the form of single crystals. An semi organic nonlinear optical single crystal of Glycine Guanidine Nitrate (GLGN) has been grown by the aqueous solution of α-Glycine and Guanidine Nitrate by slow evaporation of the saturated solution at room temperature. Single crystal of (GLGN),............

Keywords: single crystal, X-Ray diffraction, FTIR, thermo gravimetric/differential thermal analyzer.

[1] R.A.Laudise, R.Ueda and J.B.Millin, Crystal Growth and Characterization, North- Holland Publishing Co, (1975).
[2] J.C. Brice, 'Crystal Growth Processes', Halsted Press, John Wiley and sons, New York, (1986).
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[5] Hoshino S, Mitsui T, Jona F, Pepinsky R (1957). Crystal Structure of the Ferroelectric Phase of (Glycine) 3·H2SO4 Phys. Rev., 107-125.

Paper Type	:	Research Paper
Title	:	Crystallization Kinetics and Thermal Stability of Ge100-X Sbx Amorphous Alloys
Country	:	Egypt
Authors	:	M. S. Abo-Ghazala || N. M. Abdel-Moniem || M. Al Buhairi || A. Ali
	:	10.9790/4861-090301117124

ABSTRACT: Amorphous alloys of Ge100-x Sbx (where x = 5, 50 and 95 at. %) were prepared by the usual melt quench technique. The amorphous nature of the studied compositions was verified via X-ray diffraction. The thermal conductivity of Ge100-xSbx amorphous alloys were measured versus annealing time at various selected temperatures. The results revealed a slight increase in the thermal conductivity with increasing the annealing time while a decrease in the thermal conductivity is observed with rising the annealing temperature which is attributed to decrease of the heat capacity and the mean free path of the phonons in the alloys. The compositional dependence behavior of the thermal conductivity is explained on the basis of ionicity and free carrier concentration. Results of differential scanning calorimetric (DSC) under non-isothermal are reported and discussed.

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Paper Type	:	Research Paper
Title	:	Quality Assurance of Three Dimensional Treatment Planning System For External Photon Beam Radiotherapy
Country	:	Egypt
Authors	:	Moamen M.O.M. Aly || HaniNegm || Shimaa. A. Fouad
	:	10.9790/4861-090301125133

ABSTRACT: Background: The quality assurance of 3D treatment planning system (TPS) will be investigated by different things such as beam configuration, dose calculation and plane evaluation which uses dose volume histogram analyzes. Material and method: the study was performed by XIO TPS (version 4.3.3) available at South Egypt Cancer Institute (SECI). This TPS employs two different 3D algorithms (Clarkson (CLK) and Fast Fourier Transform Convolution (CON)). Relative dose calculation (RDC) in terms of percentage depth dose (PDD) and off axis beam profiles (OAR) and absolute dose calculation (ADC) in terms of dose and output factor were used and compared with the measured one using ionization chambers with water or solid phantoms...............

Keywords: Quality assurance, Treatment planning system (TPS), Relative dose calculation (RDC), Absolute dose calculation (ADC)

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