IOSR-JAP   Volume-10 ~ Issue-3 ~ May-June 2018

ABSTRACT: Silver oxide was introduced, by weight addition, to the chemical mixtures of some calcium bismuth niobium Borate glasses. The following formula was considered for preparation series of five samples (100-x) wt% [0.6 mol B2O3 – 0.2 mol CaO – 1.75 mol Bi2O3 – 0.25 mol Nb2O5] – x wt% Ag2O, where x = 0, 1, 2, 3 and 4 wt%. For characterization process some spectra like XRD, DSC and UV-Vis have been used. Where both X-ray and DSC measurements indicated the amorphous state formation, for all compositions. UV-vis spectra exhibited two indirect (γ=1/2) and direct (γ=2) electronic transitions, for each sample. For direct transitions, the optical band gap was perturbed by the addition of Ag+ cations.

 

Keywords: XRD, DSC, UV-Vis., Borate Glass, Optical Properties

[1]. C.A. Angell, J. Chem. Rev. 90 (1990) 523.
[2]. L.D. Pye, V.D. Frechette, N.J. Kreidl, Bo NY, USA, Plenum Press, 1978.
[3]. A.M. Abdelghany, H.A. Elbatal, F.M. Ezzeldin, J. Ceram. Int. 38 (2012) 1105–1113.
[4]. T. Minami and M. Tanaka, J. Non-Cryst. Solids, 1980, 38–39(Part 1), 289–294.
[5]. K. Funke and R. D. Banhatti, J. Solid State Sci., 2008, 10, 790–803.
[6]. J. P. Malugani, A. Wasniewski, M. Doreau, G. Robert and A. Al Rikabi, J. Mater. Res. Bull., 1978, 13(5), 427–433.

ABSTRACT: Electric cars are a variety of electric vehicles. The term "electric vehicle" refers to any vehicle using electric propulsion motors. The maximum speed of travel on public roads and city streets varies by country. Electric cars need to charge their batteries every 300 km or 400 km, we propose to add wind turbines to an electric car for using wind energy neglected during the movement of the vehicle to produce electricity. In this paper, the usage of unused wind energy in vehicles was developed so that additional power for vehicles is made possible and that is via converting wind power into electric one. The wind turbine was assembled from a fan and transducer. The experiment was carried out so that the wind turbine was installed above the car; values of voltages and currents in various speeds of the car were recorded. When five fans were used with different specification, the consequence was a direct proportionality instead was recorded between voltages, currents and power car's speeds................

 

Keywords: Wind turbine, wind energy, charge batteries, generate electricity, Electric Performance.

[1]. Ottmar Edenhofer, R.P.-M., Youba Sokona, Kristin Seyboth Patrick Eickemeier, et al., Reconciling top-down and bottom-up modelling on future bioenergy deployment. 2012.
[2]. Al-Shemmeri, T., Wind turbines. 2010.
[3]. Romm, J., The car and fuel of the futureenergy policy 2005. 34 (2006) 2609-2614
[4]. Zerrahn, A., Wolf-Peter Schill, and Claudia Kemfert, On the economics of electrical storage for variable renewable energy sources. arXiv preprint arXiv, 2018. 1802.07885
[5]. E.H. Wang, H.G.Z., B.Y. Fan a, M.G .Ouyang, Y. Zhao, Q.H. Mu, Study of working fluid selection of organic Rankine cycle (ORC) for engine waste heat recovery. Energy 2011. 3406e3418.

ABSTRACT: This short paper is to provide further proof, in addition to the below listed acknowledgements, using properties of a pendulum, with rather far reaching implications of toppling Einstein's General Theory of Relativity, yet again. It can be considered to be the final nail, in Einstein's General Theory Relativity's, coffin.

 

Keywords: PENDULUM, PERIOD, EINSTEIN, POLES, EQUATOR

[1]. Einstein's General Relativity Einstein, Albert (1916). "The Foundation of the General Theory of Relativity" (PDF). Annalen der Physik 354 (7): 769. Bibcode:1916AnP...354..769E.doi:10.1002/andp.19163540702
[2]. Pendulum https://en.wikipedia.org/wiki/Pendulum

ABSTRACT: This work evaluated the path loss ad received signal strength level (RSSL) of a GSM (Globacom) Network at 900MHz in Umuahia- Eastern Nigeria using Drive test. Low Quality of signal (QOS) was discovered in Umuahia within the period of investigation. Results from simulation of the acquired data using Matlab reviewed a considerable decline in the Receive Signal Strength Level (RSSL) in all sectors under investigation due to increase in population, building heights and vegetations. It is recommended that the frequency band be increased from 900MHz to 1800MHz to help remedy the effect of path loss within Umuahia.

 

Keywords: Path Loss, Signal Strength, Quality of Service, Propagation, Wireless Network, Transmission.

[1]. Wojuade, J. I. (2005). Impact of Global System for Mobile Telecommunication on Nigerian Economy: A Case of Some Selected Local Government Areas in Oyo State, Nigeria.
http://leadership.ng/business/558164/mobile-network-and-nigerias-telecommunication-growth
[2]. Isabona, J. and Isaiah G. P. (2013). CDMA2000 Radio Measurements at 1.9GHz and Comparison of Propagation Models in Three Built-Up Cities of South-South, Nigeria, American Journal of Engineering Research, Vol. 02, Issue-05, pp 96-106.
[3]. Ahmadi, A.L. Capone, P. and Malucelli, F. (2008). "Radio Planning and Coverage Optimization of 3G Cellular Networks", Journal of Wireless Networks, Vol. 14, No. 4, pp. 435–447.
[4]. Tsenka Stoyanova, Fotis Kerasiotis, Aggeliki Prayati, George Papadopoulos (2009). A Practical RF Propagation Model for Wireless Network Sensors. Third International Conference on Sensor Technologies and Applications

ABSTRACT: External and internal instabilities have been theoretically studied under electron type conductive conditions located in the external stable electic and magnetic fields. The frequencies of the waves formed under internal and external instability were calculated. Analytical expression of the electric field was calculated using the theoretically calculated impedance.

 

Keywords: wave, oscillation, instability, impedance, electric field

[1]. Конуэлл. Кинетические свойства полупроводников в сильных электрических полях. Издательство «Мир» Москва- 1970,стр. 14-17.
[2]. В.Л. Бонч-Бриевич, И.П. Звячин, А.Г. Миронов. Доменная электрическая неустойчивость в полупроводниках. Издательство «Наука» Москва-1972. стр. 16-20.
[3]. Л.Э. Гуревич и Э.Р. Гасанов, ФТТ, 11, 1433, 1969
[4]. Л.Э. Гуревич и Э.Р. Гасанов, ФТП, 3, 1201, 1969
[5]. Л.Э. Гуревич и Э.Р. Гасанов, ФТТ, 11, 3684, 1969

ABSTRACT: Nanotechnology is a multidisciplinary field, which covers a vast and diverse array of devices derived from engineering, biology, physics and chemistry. These devices include nanovectors for the targeted delivery of anticancer drugs and imaging contrast agents. Nanowires, nanorobot, nanoeggs and nanocantilever arrays are among the leading approaches under development for the early detection of precancerous and malignant lesions from biological fluids. These and other nanodevices can provide essential breakthroughs in the fight against cancer. This paper mainly contains about Nanotechnology and its 'various' applications. And this tells about the history of Nanotechnology and its necessity. This also discusses how it will improve our lives and about the applications in wide range. Here in my study I use scientoos to make nanotechnology a easy and interesting one.

 

Keywords: Aerogels, Carbon nanotube, Nanoscale , Scientoons,

[1]. Prasad, S. K. (2008). Modern Concepts in Nanotechnology. Discovery Publishing House. pp. 31–32. ISBN 81-8356-296-5.

[2]. "Nanoscience and nanotechnologies: opportunities and uncertainties". Royal Society and Royal Academy of Engineering. July 2004. Archived from the original on 26 May 2011. Retrieved 13 May 2011.

[3]. "Nanotechnology: Drexler and Smalley make the case for and against 'molecular assemblers'". Chemical & Engineering News. American Chemical Society. 81(48): 37–42. 1 December 2003. doi:10.1021/cen-v081n036.p037. Retrieved 9 May2010.

[4]. Kahn, Jennifer (2006). "Nanotechnology". National Geographic. 2006 (June): 98–119.

[5]. "Cover Story – Nanotechnology". Chemical and Engineering News. 81 (48): 37–42. December 1, 2003

ABSTRACT: This paper reports the study of electronc and optical propertis of double perovskite oxide Pb2ScSbO6 by using the FP-LAPW method within density functional theory. Lattice constants are calculated by doing volume optimisation. The values of bulk modulii and pressure derivatives had been obtained. Results of density of states and energy bands are also presented. The indirect band gaps have been found for both the systems by using the GGA and mBJ approximations. Calculations of optical properties is also presented by considering the variations of optical parameters as a function of incident photon energy..

 

Keywords: bands, density of states, double perovskite, FP-LAPW, photon energy, dielectric constants

[1]. H. Y. Hwang, S. W. Cheong. Low-field magneto-resistance in the pyrochlore Tl2Mn2O7. Nature (London) 389, 1997, 942.
[2]. D. Serrate, J. M. D. Teresa, M. R. Ibarra. Double perovskites with ferromagnetism above room temperature. J. Phys. Condensed
Matt. 19, 2007, 023201.

[3]. A. J. Hauser, J. R. Soliz, M. Dixit, R. E. A. Williams, M. A. Susner, B. Peters, L. M. Mier, T. L. Gustafson, M. D. Sumption, H. L. Fraser, P. M. Woodward and F. Y. Yang. Fully ordered Sr2CrReO6 epitaxial films: A high-temperature ferrimagnetic semiconductor. Phys. Rev. B 85, 2012, 161201.
[4]. K. I. Kobayashi, T. Kimura, H. Sawada, K. Terakura, Y. Tokura. Nature 395, 1998, 677 –680.
[5]. M. Bonin, W. Paciorek, K. Schenk, G. Chapuis. Acta Crystallogr., Sect. B: Struct. Sci. 51, 1995, 48.

ABSTRACT:The aim of this work is to study the combined effects of transverse magnetic field and double diffusion on unsteady boundary-layer flow of a viscous, incompressible, electrically conducting and twodimensional heat-absorbing viscoelastic fluid flow past a semi-infinite vertical permeable plate in presence of free convection. The Rivlin-Ericksen model is employed to simulate the rheological liquids encountered in cooling of electronic devices, polymer solutions, hydrocarbons and chemical engineering processes. The plate is
assumed to move with a constant velocity in the direction of fluid flow while the free stream velocity is assumed to follow the exponentially increasing small perturbation law. Time-dependent wall suction is assumed to occur at the permeable surface. The transport equations...........

 

Keywords:Viscoelastic Rivlin-Ericksen Fluid; Free Convection; Porous Medium; Double Diffusion; Magnetic Field; Finite Difference Method

[1]. R. Srinivasa Raju, Unsteady MHD boundary layer flow of Casson fluid over an inclined surface embedded in a porous medium with thermal radiation and chemical reaction, Journal of Nanofluids, Vol. 7, No. 4, pp. 694-703, 2018.
[2]. R. Srinivasa Raju, G. Jithender Reddy and M. Anil Kumar, Viscous Dissipation Impact on MHD Free Convection Radiating Fluid Flow past a Vertical Porous Plate, AIP Conference Proceedings, Vol. 1953, Issue 1, pp. 140074-1-140074-4, 2018.
[3]. J. Anand Rao, R. Srinivasa Raju and C. D. Buchaiah, Study of MHD over a vertical plate in presence of free convection flow and Hall Current through EFGM solutions, AIP Conference Proceedings, Vol. 1953, Issue 1, pp. 140126-1-140126-4, 2018.
[4]. P. Manideep, R. Srinivasa Raju and G. Jithender Reddy, MHD Free Convection Heat Transfer Couette Flow in Rotating System, AIP Conference Proceedings, Vol. 1953, Issue 1, pp. 140143-1-140143-4, 2018.
[5]. P. Manideep, R. Srinivasa Raju, T. Siva Nageswar Rao and G. Jithender Reddy, Unsteady MHD Free Convection Flow of Casson Fluid over an Inclined Vertical Plate Embedded in a Porous Media, AIP Conference Proceedings, Vol. 1953, Issue 1, pp. 140038-1-140038-4, 2018.

ABSTRACT: The development of composites is not only a synthetic fiber composite but also natural fiber composites as they can be recycled. In addition, natural fiber composite also has other advantages when compared with glass fiber, more environmentally friendly because it is able to degrade naturally and the price is cheap, so in this study fiber composite board made of terminalia catappa fruit fiber. The purpose of this research is to know the characteristics of fiber terminalia catappa fruit fiber composite board with poly vinyl acetate matrix. It is expected that from this research can be made composite board that has characteristics according to SNI or ISO standards. Characteristics...........

 

Keywords: composite, terminalia catappa fruit fiber, PVAc, tensile strength

[1]. Christiani, E.S, (Thesis, North Sumatra University), " Characterization of palm fiber on Composite Board Short Fiber Figures As a Neutron Radiation Shiel " (2008).
[2]. Syafiisab, A, " Effects of Paper-Based Core Composites, with Rice Husk Mixer, and Coconut Fiber on Bending Panel Strength ", USM Surakarta, (2010).
[3]. Lee,Youneung dan ChangwhanJoo. Sound Absorption Properties of Recycled Polyester Fibrous Assembly Absorbers. AUTEX Research Journal, Vol. 3, No2, 78-84.
[4]. Darmawan, Eman, Journal AGROTECH, Vol 1, No. 1, (2016).
[5]. Tampewa, P., Pelealu, J. Kandou, F., Journal of Pharmaceutical Sciences– UNSRAT Vol. 5 No. 1, (2016).

ABSTRACT: This study assess the radioactivity of surface water sources in Oju, Otukpo and Ogbadibo Local Government Areas of Benue State, North-Central, Nigeria. A total of fifteen (15) surface water samples were collected from different locations within these selected local government areas. The activity concentrations of natural radionuclide's in the water samples were determined using gamma ray spectrometer comprising a 8.5 cm x 6.5 cm Nal (TI) detector (model: 802) coupled to a multichannel analyser. The mean activity concentration obtained in OJu LGA for 40K, 238U and 232Th were found to be 3.864 ± 9.41 Bq/L, 2.13 ± 0.415 Bq/L and 1.634 ± 0.178 Bq/L. The mean activity concentration obtained in Otukpo LGA for 40K, 238U and 232Th were found to be 3.534 ± 0.366 Bq/L, 2.703±0.372 Bq/L and..........

 

Keywords: Natural radionuclide, Surface water, radiological hazard, Exposure.

[1]. Agbalagba EO, Onoja RA: Evaluation of natural radioactivity in soil, sediment and water samples of Niger Delta (Biseni) ood plain lakes, Nigeria. J Environ Radioact 2011, 102: 667–671.10.1016/j.jenvrad.2011.03.002.
[2]. Ajayi, I.R., Ajayi, O.S, & Fusuyi, A.S. (1995) The Natural Radioactivity of Surface Soils in Ijero-Ekiti, Nigeria. Nig J Phys, 7: 101-103.
[3]. Ajayi, O.S. & Ajayi, I.R. (1999) A survey of Environmental Gamma Radiation Levels of some areas in Ekiti and Ondo State, Southwestern Nigeria. Nig J Phys, 11:17-21 [4]. Arogunjo A.M., Efuga, E.E., and Afolabi, M.A. (2004). Levels of natural radionuclide"s in some Nigerian cereals and Tubes. Jour. of Environ. Radioactivity 82: 1-6.
[5]. Avwiri, G.O. (2005) Determination of Radionuclide Levels in Soil and Water around Cement Companies in Port Harcourt. J Appl Sc. Environ Mgt, 9:27-29..

ABSTRACT: The field of Bionanoscience is one of the vibrant research area in smart material, antimicrobial agent and drug delivery system. Cost effective method of simple pyrolysis treated synthesis of nanoparticles is the present research in branch of nanobioscience. The NiO doped nanocomposite synthesized simply have been widely used in the anti microbial techniques and waste water management. In this research article we present a simple and cost effective method synthesis of NiO doped ZnO/MWCNT nanocomposite. This composite were structurally and morphologicaly charecterized by Powder X-Ray Diffraction (PXRD) and Field Emission Scanning Electron Microscope (FESEM). It was optically chrecterized by the Ultra-Violet Visible (UV-Vis) spectroscopy and Fourier Transform Infra-Red (FTIR) spectroscopy. Further these charecterized by Energy Dispersive X-Ray spectroscopy.........

 

Keywords: Nanocomposites, XRD, FESEM, Antibacterial, antifungal and Photocatalytic

[1]. D.H.Piva, R.H.Piva, M.C.Rocha, J.A.Dias, O.R.K.Montedo, I.Malavazi, M.R.Morelli, Antibacterial and photocatalytic activity of ZnO nanoparticles from Zn(OH)2 dehydrated by azeotropic distillation, freeze drying, and ethanol washing, Advanced Powder Technology, 28,2017,463.
[2]. Saloni Sood, Arun Kumar, Neeraj Sharma, Photocatalytic and Antibacterial Activity Studies of ZnO Nanoparticles Synthesized by Thermal Decomposition of Mechanochemically Processed Oxalate Precursor, Chemistry select, 1, 2016, 6925.
[3]. Thangavelu Kavitha, Anantha Iyengar Gopalan, Kwang-PillLee, Soo-YoungPark, Glucose sensing, photocatalyticand antibacterial properties of graphene–ZnO nanoparticle hybrids, Carbon, 50, 2012, 2994.
[4]. N. Elavarasan, K. Kokila, G. Inbasekar, V. Sujatha, Evaluation of photocatalytic activity, antibacterial and cytotoxic effects of green synthesized ZnO nanoparticles by Sechium edule leaf extract, Research on Chemical Intermediates, 43, 2017, 3361.
[5]. K. Pradeev Raj, K. Sadaiyandi, A. Kennedy, Suresh Sagadevan, ,Photocatalytic and antibacterial studies of indium-doped ZnO nanoparticles synthesized by co-precipitation technique, Journal of Materials Science: Materials in Electronics, 28, 2017, 19025.

ABSTRACT: The activity concentrations of naturally occurring radionuclides 40K , 238U, and 232Th in surface soil in Oju, Otukpo and Ogbadibo Local Government Area of Benue State, Nigeria were measured using NaI (TI) gamma ray spectrometric technique. The mean activity concentration of radionuclides 40K, 238U and 232Th were 8211.358±668.544 Bq kg-1, 191.812±9.046 Bq kg-1 and 76.478±7.478 Bq kg-1 in Oju, 176.792 ± 18.632 Bq kg-1, 25.514 ± 5.772 Bq kg-1 and 42.544 ± 4.662 Bq kg-1 in Otukpo, 644.466±53.516 Bq kg-1, 43.468±9.312 Bq kg-1 and 46.756 ± 4.60 Bq kg-1 in Ogbadibo Local Government Area respectively. The total mean absorbed dose rate in this study were 141.93304 nGyh-1, 46.66065 nGyh-1 and 77.22535 nGyh-1 for Oju, Otukpo and Ogbadibo, whereas the mean annual effective dose rate.........

 

Keywords: Soils, radiological hazards, gamma ray spectrometry

[1]. Ajayi, Isaac R. (2008). Background radioactivity in the sediments of some rivers and streams in Akoko, Southwestern Nigeria and their Radiological effects. Research Journal of Applied Sciences 3(3) p183-188.
[2]. ALAAMER, A.S. (2008). Assessment of Human Exposures to Natural Sources of Radiation in Soil of Riyadh, Saudi Arabia, Turkish J. Eng. Env. Sci., 32, 229 – 234.
[3]. Alharbi W, AlZahrani J, Abbady A. Assessment of radiation hazard indices from granite rocks of the South-Eastern Arabian Shield, Kingdom of Saudi Arabia. Austr J Basic Appl Sci 2011; 5: 672-682.
[4]. Avwiri, G. O., Egieya J. M. and Ononugbo, C. P. (2013). Radiometric survey of Aluu landfill in Rivers State, Nigeria. The International Institute for Science, Technology and Education, 22www.iiste.org
[5]. Avwiri, G.O, Ononugbo, C.P and Nwokeoji, I.C (2014). Radiation Hazard indices and Excess Life Cancer Risk in soil, sediment and water around min, - Okoro/Oginigba Creak, Port Harcourt, Rivers State Nigeria..