International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006

IJPS Articles in press

Coherent perfect absorption in plasmonic planar metasurface

Article in Press

The coherent perfect absorption (CPA) for a planar resonator of silver has been elaborated here in numerical and analytical approaches. It is investigated numerically in different geometrical shapes and spectral analysis. The CPA mode is observed spectrally sensitive to the geometry of the resonator. The scattering matrix method is employed in theoretical analysis. The CPA conditions and output irradiance expressions are...

Author(s):Md. Alamgir Badsha

Analysis and feasibility of 50 kWp self-consumption solar photovoltaic system for four Senegalese typical climatic zones using PVsyst software

Article in Press

The objective of this study is analysis and feasibility of 50 kWp self-consumption photovoltaic system used for supplying the electrical load of military bases in Senegal. It refers to a simulation of performance photovoltaic system in four Senegalese typical climatic zones. The 50 kilowatt-peak (kWp) self-consumption photovoltaic simulated is built. The number of modules is 144. The power of each module is 280 Wp. 18...

Author(s):Adama Sarr, Cheikh Mohammed Fadel Kebe, Ababacar Ndiaye

Wavelet Transform Theory: Mathematical Principles in Gamma Spectroscopy Processing

Article in Press

Wavelet transforms (WT) has been used for analyzing different types of spectra successfully. It has certain advantages compared with the Fourier transforms (FT) for signals decompositions. In the present work, we introduce the mathematical principles of applying WT in processing gamma spectra.

Author(s):M.E.Medhat , A.M.M Elsayed, Jie Liu

Micromechanical modeling of the elastic behavior of particles-reinforced composites

Article in Press

This paper is devoted to the introduction of a micromechanical modeling of the elastic behavior of composite materials with spherical reinforcements. The model is based on the generalized self-consistent scheme (GSCS) and homogenization/localization techniques over the entire representative volume element (VER). The composite is modeled by the three phase model and the methodology is based on the integral equation and...

Author(s):E. H. Barhdadi

A Novel Geophysical Soil Loss Model for Erosion Prediction and Monitoring in Anambra, South East, Nigeria

Article in Press

Gully erosion is an environmental problem that has over decades threatened Anambra State as well as other parts of Nigeria and countries of sub-Saharan Africa. Gullies threaten the soil, water, material resources and agricultural productivity and cause human losses annually. It accounts for the severe environmental degradation in Anambra State and the South-East of Nigeria arising from heavy runoff and soil loss....

Author(s):R.C. Nwankwo and E.C. Okoli

Mineralogical and geochemical characterization of shale-clay deposits from southeastern Nigeria for drilling mud formulation

Article in Press

Mineralogical and geochemical tests were conducted on bentonitic samples obtained from Imo shale and the Ameki-Bende formations in Anambra basin of southeastern Nigeria, in order to evaluate the potential for use in drilling mud formulation. Fifty samples were collected and screened based on composition, grain size, degree of alteration, and filtration conditions. Four of the samples namely SP1, SP2, SP3 and SP4 that meet...

Author(s):Ehinola, O.A, Falode, O.A and Egbo, O.K

The effects of Localized trap energy on Carriers Lifetime of Radiative, Auger and Shockley’s Recombination Mechanism for Aluminium Nitride (AlN) Semiconductor

Article in Press

This study presents the analysis of the variation of effective lifetime of carriers with temperature in different recombination mechanisms for aluminum nitride. Aluminum nitride is stable at high temperatures in inert atmospheres and melts about 2200◦C. In a vacuum, AlN decomposes at 10◦C. In the air, surface oxidation occurs above 700◦C. For hole trap region, the probability of emission of hole much greater than the...

Author(s):Getu Endale

Half-Step Implicit Linear Multistep Hybrid Block Third Derivative Methods of Order Four for the Solution of Third order Ordinary Differential Equations

Article in Press

This paper proposes a half-step third derivative hybrid block method with two cases of order four for solution of third Order Ordinary Differential Equations.Method of interpolation and collocation of power series approximate solution was used to generate the continuous hybrid linear multistep method,which was then evaluated at non-interpolating points to give a continuous block method. The discrete block method was...

Author(s):Skwame Yusuf, Raymond Dominic & Tumba Pius

Investigation of the ^16 O, ^20 Ne and ^24 Mg Nuclei as an alpha cluster plus core cluster

Article in Press

In this paper, the light nuclei are considered in the cluster model especially the nuclei with A=4n(n is the number of alpha particles). Therefore, the Schrodinger equation is solved from the NU method by using a local potential. First, we study ^16 O,^20 Ne and ^24 Mg nuclei as the two-cluster systems, i.e. (α+ core), and obtain their energy levels. These results are compared with experimental data. Somebody can see...

Author(s):Sahar Aslanzadeh, , Mohammad Reza Shojaei and Ali Asghar Mowlavi

Evaluation and structural interpretation of aeromagnetic anomalies over parts of Gubio and environs of chad (Bornu) basin, northeastern Nigeria, using 3-d Euler Deconvolution and source parameter imaging techniques

Article in Press

The high resolution magnetic field data of Monguno and environs (data maps 066, 067, 089 and 090) of the Nigerian Chad (Bornu) basin were structurally interpreted to investigate the hydrocarbon and solid mineral implications of the basin by determining the magnetic basement depth and delineating the basement morphology, the relief and other structural features associated with the area and their trends employing Oasis...

Author(s):Joachims Chukwudi Ikeh, Yi Tang, Alichi Alichi Udeagha

EVALUATION OF PV PERFORMANCE PREDICTION MODEL IN TROPICAL ENVIRONEMENT IN SENEGAL

Article in Press

Many authors in the literature have worked on models for producing PV module performance, but the question of a climate-specific model is problematic. Some studies have shown more appropriate models for any PV module technology, while others have highlighted models that are more appropriate for a given climate. The aim of this work is to evaluate our model which is base on the I-V characteristic and their accuracy has been...

Author(s):

The Integration of Hamilton Principle with Einstein Field Equation

Article in Press

Hamilton Principle was entering into one side and Einstein Field Equation(EFE) was entering into the other side, based on the thought of relativity between reality and virtuality in physics and the Postulate of Completeness, the author would rather integrate Hamilton Principle with EFE so as to build a new physical principle------Hamilton Tensor Equation(HTE), which could substitute for Hamilton Principle and also EFE to...

Author(s):

Assessment of heavy metal pollution in marine sediments receiving produced water, Delta State, Nigeria.

Article in Press

Every aspect of oil and gas operations poses significant negative impacts on the environment in varying levels, these environmental impacts have economic and public health consequences on the indigenes of the operation locality. Produced Water discharge is one of such aspects of the upstream oil and gas operation whose potential for environmental degradation has necessitated both local and International Regulations for its...

Author(s):University of Nigeria, Nsukka

The magnetic moment of elementary particles is studied by space vector and space curvature

Article in Press

This paper reaffirms the basic agreement of the material space theory: (1) Space is a physical existence; (2) "Force" is the action to space, and "force" is equal to the reciprocal value of "time"; in the absence of special description, "force" is the reciprocal of time; (3) There is a steady velocity field in three-dimensional space, whose intensity is the speed of light C. (4) Mass is a property of space produced by...

Author(s):

Comparative study of caffeine content in beans and leaves of coffea arabica using UV/Vis spectrometer

Article in Press

Caffeine is one of the compounds found in coffee beans and other parts of coffee plant. However, its relative content in different coffee plant parts is least researched. Therefore, this study was designed to determine the content of caffeine in green coffee leaves and beans. In this work, we report content of caffeine in green coffee beans and leaves of coffea arabic using UV/Vis spectrometer with liquid-liquid extraction...

Author(s):

Two values of the Constant G obtained from Inclining-Pull Projection Method

Article in Press

The Newtonian gravitational constant is regarded as the most fundamental constant. So far, more than 200 experiments have been done to measure its true value. But large discrepancies in those results appeared. Owing to the weakness of the gravitational interaction and the impossibility of shielding its effects, it is very difficult to find new method to measure G. Thus, most previous experiments were based on the torsion...

Author(s):Information Construction and Service Center, Neijiang Normal University, Neijiang , Szechwan Province

Seasonal prediction of solar radiation taking into account the sky condition : Case of Nouakchott, Mauritania

Article in Press

This paper proposes a method for evaluating the available solar energy according to different type of sky (clear sky, moderately covered sky and covered sky). Four semi-empirical models for estimating solar radiation (Link Cloudiness Factor (LCF), Perrin-Brichambaut (PB), Ghouard (GD), BirdHulstrom (BH)) have been used to predict solar radiation accoording to the sky conditions. An analysis of the influence of seasonal...

Author(s):universitie of nouakchott AL-ASRIYA

Gravitational Waves as a Test of General Relativity

Article in Press

General relativity has been very successful as a model for space and gravity. It is supported from a range of experimental results. With the advent of the detection of gravitational waves, another platform exists to trumpet its triumph. The merger of black holes has provided evidence in support of the theory of Einstein. Furthermore, the one neutron star merger so far detected provides much more information because of the...

Author(s):

INTEGRATED GEOPHYSICAL APPROACH FOR SEDIMENTARY OUTCROP AT NORTHWESTERN PENINSULAR MALAYSIA

Article in Press

An outcrop is a visible exposure of bedrock or ancient superficial deposits on the surface of the Earth. In recent years, outcrop studies have become very important to understand the geology of the earth. The lack of studies on outcrops depends on the interpretations and observations at the surface of the earth only. Besides that, lack of specific physical value for the type of materials can cause misinterpretation of...

Author(s):School of Physics, Universiti Sains Malaysia (USM), Penang, Malaysia

Gravitation - flat power field

Article in Press

A new principle of origin and the nature of the action of gravity forces are proposed. Forces of universal attraction have plane-symmetrical directions. On this basis, it becomes possible to reconsider certain regularities in natural science. The new principle of gravitation will allow to explain physical paradoxes, to improve methods of scientific research and some technological processes.

Author(s):S.A. Orlov

The Superiority of Supercritical Fluid Extraction Over Steam Distillation and Solvent Extraction Methods for the Extraction of Aroma from Salacca Zalacca (Gaertn.) Voss.

Article in Press

Salacca zalacca (Gaertn.) Voss (salak fruit or snake fruit) is a species of palm tree native to Southwest Java and North Sumatra in Indonesia. It is known as one of the tropical fruits in Malaysia. It is a reddish-brown scaly skin with pleasant pineapple, pear and banana-like aromas. Its strong pleasant aroma, S. zalacca has high potentiality in the perfumery and pharmaceutical industries. The volatile aromas of plants are...

Author(s):Nur Nadhirah H. M, Siti Zaiton M.S, Tengku M. A, Zaidul I. S. M, Mohammad Jamshed Siddiqui, Anugerah Budipratama Adina, Md. Nurul Islam Siddique, Wan Nik Bin Wan Sani and Mokhlesur M.R.

Mineralogical and Major oxide Characterization of Panyam clays, North – Central Nigeria

Article in Press

Clay minerals are form over long periods of time, through weathering as a result of gradual chemical breakdown of rocks rich in feldspar. The extent of weathering is determined by many factors. Most common constituent mineral of clays is often one of the members of the mica mineral group. They include illite, sericite, muscovite, and biotite. Others are kaolinite, smectite, mixed-layer clays and chlorite. This paper...

Author(s):Umbugadu A.A. and Igwe O.

Analysis of clearness index on a regional scale

Article in Press

Analysis of daily average clearness index and relative possible number of sunshine hours n/N have been made using accumulated meteorological data obtained from Nigeria Meteorological Agency (NIMET) station, Oshodi, Nigeria from 1985 to 2014. The values of regression constants ( and ), sum of the regression constants ( ), Mean-Bias-Error (MBE), root-mean-square-error (RMSE) and correlation-coefficient (RC) are presented...

Author(s):K.O. Rauff, I.A. Abir and Abdul Qadir

Combined heat and mass transfer effects in polymeric liquid between isothermal stretching disks with convective boundary conditions

Article in Press

A theoretical analysis is performed to examine the flow of an incompressible polymeric liquid (Maxwell fluid) between two infinite isothermal stretching disks. The convective heat and mass boundary conditions are taken into account. Further, the effects of viscous dissipation and chemical reaction are also carried out. The governing equations associated with momentum, energy and concentration profiles are reduced into set...

Author(s):M. S. Hashmia, N. Khanb and Sami Ullah Khanc

Spacelike Surfaces with a Common Asymptotic Curve in Minkowski 3-Space E_1^3

Article in Press

In this paper, we study the problem of finding a family of spacelike surfaces from a given spatial asymptotic curve in Minkowski 3-space. We obtain the parametricrepresentation for a spacelike surface pencil whose members share the same asymptoticspacelike curve as an isoparametric curve. Using the Frenet frame of the given asymptoticcurve, we present the spacelike surface as a linear combination of this frame and...

Author(s):Rashad A. Abdel-Bakya

ESTIMATION OF RADIOLOGICAL PARAMETERS ASSOCIATED WITH MINING OF TANTALITE IN OKE-OGUN, OYO STATE, NIGERIA

Article in Press

Mining activities brings the artisan miners to close proximity with naturally occurring radioactive materials (NORM) which exposes the miners to ionizing radiation. In this study, estimation of radiological hazards and risks related to work activities in Tantalite mining sites in Oke-Ogun, Oyo State has been carried out. A total 40 samples comprising of (12) Tantalite ore ({Fe,Mn}Ta206), 17 soil samples and 11 waste rocks...

Author(s):ABAYOMI EKUNDAYO AJETUNMOBI

Dual solutions for the Modified Fourier and Fick,s theories for Carreau nanofluid

Article in Press

In the current framework, an investigation is carried out on the flow of dual solutions of Car- reau nanofluids in the presence of Cattaneo-Christov double diffusion with focus on heat and mass transfer which includes the effects of Brownian motion and thermophoresis parameter. A nonlin- early shrinking sheet has been used to create the flow. The thermal and concentration diffusions are considered by introducing...

Author(s):Humara Sardar

Volumetric and Viscosity Properties for the Binary Mixtures of 1-hexyl-3-methylimidazolium Tetrafluoroborate with butyl acetate.

Article in Press

In this work, densities and viscosities for the binary mixtures of 1-hexyl - 3-methylimidazolium tetrafluoroborate, [C6mim][BF4], with butyl acetate, have been determined at 298.15 K. These data were used to calculate the excess molar volumes VEm for the mixtures. It is shown that values of VEm are negative, in the whole concentration range. The VEm values show their minimum at the composition of χIL≈ 0.3, exhibit a...

Author(s):Ayyasamy A

〖Coexistence of superconductivity and Spindensity wave in ferropnictides Ba〗_(1-x) K_x 〖Fe〗_2 〖As〗_2

Article in Press

The study of spin-density-wave (SDW) and superconducting order parameter is a core topic for research on the FeAs-based high Tc superconductors. By using mathematical model Hamiltonian for the system and Green’s function formalism (creation and annihilation operators), we have obtained expressions for superconducting transition temperature (TC), spin density wave transition temperature (Tsdw), superconductivity order...

Author(s):Sewnet Demelash Yihun

A TECHNIQUE FOR DETERMINING EFFICIENCY OF AEROSOL SAMPLER

Article in Press

Viscosity, an important aspect in air flow at the lowest layer of the atmosphere was determined during Harmattan period as 1.88 x 10-5 Nsm-2 ± 0.04%. Kinematic viscosity, another important parameter on atmospheric motion was established as 0.54 x 10-5 m2s-1 ± 0.02%. For contribution to protection of human and ecological systems from dangerous levels of air pollution, a new technique for determining the efficiency of...

Author(s):M. I. MAMUNU

Judd–Ofelt analysis, Structure and Optical spectra of Er3+ in calcium-sulfate phosphate based glasses

Article in Press

Er3+ -doped CaSO4-P2O5 glasses with successive increase in Er2O3 contents (from 0.1 to 0.9 mol %) were prepared using melt-quench method aimed to improve their chemical stability and optical behavior. The structure was investigated using FT-infrared and Raman spectroscopy. Non-crystalline phases were detected by X-ray diffraction (XRD) spectroscopy. From the Raman spectra, Qi were identified (i = 0, 1, 2 and 3) stands for...

Author(s):Aliyu Mohammed Aliyua

Modeling and simulation of a high-pressure polyethylene tubular reactor

Article in Press

The complex world of polymerization has become an important topic for research due mainly to the great investments it demands and the difficulty in operation of the huge plants that exist to produce polymers. Many papers have been written about this, most of them focusing on the reactor performance and its stability. In the present work, a model and simulation for the high- pressure polyethylene tubular reactor has been...

Author(s):Roberto Ferro Escobar

Approximate Solutions of the Relativistic Dirac equation with Coulomb-Hulthén-like Tensor Interaction

Article in Press

The solutions of spin and pseudospin symmetries with Trigonometric scarf potential are obtained in the presence of a new tensor interaction which breaks down the energy degeneracies in both symmetries leading to atomic stability. The nonrelativistic equation is obtained by taking the nonrelativistic limit of the spin symmetry. A simplified condition for energy equation for Formula method for special case is also given....

Author(s):C.A. Onate, O. Adebimpe, A.F. Lukman and I.J. Adama

Feasibility analysis of hybrid electricity generation system by HOMER for Mauritanian northern coast

Article in Press

The reported work was motivated by the energy needs in the Mauritania region and the utility of the search features of a software system, named HOMER (Hybrid Optimization of Multiple Energy Resources), for feasibility analysis of a hybrid power generation system (HS) for the Mauritanian northern coast. This study analyzed a sample of the available wind resources to meet the energy needs of these localities, using the HOMER...

Author(s):M. Soukeyna, I. B. Ramdhane, D. Ndiaye, M. Elmamy, M. M. Menou, A. M. Yahya, A. K. Mahmoud and I. Youm

Laplace decomposition method for Whitham-Broer-Kaup shallow water waves equations

Article in Press

In this paper, the Laplace decomposition method was applied to find travelling wave solutions of the Whitham-Broer-Kaup (WBK) system. To illustrate the capability of the approach, two numerical examples are given where the propagation and the error of the obtained solutions are shown in comparison of its exact solution. The approximate solutions are calculated in form of convergence power series with easily computable...

Author(s):Jamshad Ahmad and Mariyam Mushtaq

Comparative analysis of meteorological data from satellite and ground-based at some selected stations in Nigeria

Article in Press

This work studied the comparative analysis of meteorological parameter (temperature, solar radiation and relative humidity) of satellite and Nigerian Meteorological Agency (NIMET) data at Kano, Kaduna, Owerri and Sokoto for 2006, 2007, 2008, and 2010, respectively. Statistical tools of mean bias error (MBE), root mean square error (RMSE) and correlation coefficient (r) were determined to validate the data. The results...

Author(s):Isikwue B. C., Sombo T. and Ibeh G. F.

Coupling of iteration method and exact Lagrange multipliers for Helmholtz and non-linear parabolic equations

Article in Press

Solutions of partial differential equations are of great importance for mathematicians and scientists. In this paper, the author likewise calculated exact Langrage multiplier and it progressively connects to the definite results of Helmholtz and nonlinear parabolic equations. This study shows the advantages of exact Lagrange multipliers and their coupling with Variational Iteration Method. Computational work shows that the...

Author(s):Muhammad Hamid, Muhammad Usman and Syed Tauseef Mohyud-Din

Analysis of long-term rainfall trends over Nigeria

Article in Press

Monthly mean of rainfall data (mm) between January to December for the period 1901 to 2006 for 23 stations (grid points) over Nigeria were analyzed in this study. The trends of rainfall over the 23 stations were examined statistically based on the time series, mean, standard deviation of the rainfall data. The study period were sub-divided into 30-year Climatic means and compared with World Meteorological Organization...

Author(s):Olakunle Rufus Oladosu

Effect of Eddy diffusion on atmospheric electrical processes in a fair weather environment

Article in Press

Most of the past studies have been concentrated towards the average current that flows from the thunderstorm into the global electric circuit, the role of equalization layer, and the variations of electric field for maintaining the ionosphere’s electric potential difference in the atmosphere, which are directed downward between the equipotential surfaces of the ionosphere and ground. The analytical relation for both the...

Author(s):Falade John A.

Seasonal variability of rainfall and its decadal anomaly over Nigeria: Possible role of solar and geomagnetic activities

Article in Press

This study investigates the seasonal variations of rainfall and its decadal anomaly over Nigeria and the possible role of solar and geomagnetic activities. Sunspot number and geomagnetic aa index were used as solar indices. Monthly mean daily rainfall data from Nigeria Meteorological (NIMET) Agency was used in this study. Descriptive, bivariate, and power spectral density (PSD) analyses, as well as Mann-Kendall trend test...

Author(s):AUDU Moses Owoicho and OKEKE Francisca Nneka

Preparation and characterization of Holmium doped borate glass

Article in Press

Holmium doped borate glasses were prepared by conventional rapid melt-quench method. The X-ray powder diffraction (XRD) pattern indicates the amorphous nature of Holmium doped borate glass. Photoluminescence spectrum gives an idea of the optical properties of Holmium doped borate glass. Determination and differentiation of the various vibrational modes were done using Fourier transform infrared spectroscopy (FTIR)...

Author(s):Deepa A. V., Priya M. and Suresh S.

Design, green synthesis and reactions of 2,3-dioxo-1,2,3,4-tetrahydroquinoxaline-6 sulfonohydrazide derivatives

Article in Press

2,3-Dioxo-1,2,3,4-tetrahydroquinoxaline-6-sulfonohydrazide and its derivatives were synthesized and characterize by IR, 1H-NMR, 13C-NMR and mass spectrometry analytical methods. The 2,3-dioxo-1,2,3,4-tetrahydroquinoxaline-6-sulfonyl hydrazide (compound 1), was synthesized from the reaction of o-phenylenediamine with oxalic acid to obtain quinoxaline-2,3-dione, which was subjected to chlorosulfonation with chlorosulfonic...

Author(s):Festus O. Taiwo and Craig A. Obafemi

Overview of atmospheric physics to study climate variability, greenhouse gas impact and atmospheric temperature profile

Article in Press

Atmospheric Physics is a fascinating scientific discipline, presents a comprehensive coverage of global meteorology and climatology. It has provided essentially a viable means for tackling environmental issues, key to vital and challenging problems facing weather and climate predictions. This Paper discusses a basic understanding of atmospheric physics as an essential field behind issues of current concern on climate...

Author(s):Anoruo C. M., Okoro E. C., Okpala K. C., Orji P. O., Sivla W. T. and Robert J. J.

Improvements of corrosion resistance of Nickel–titanium (NiTi) orthopedic materials by inductively coupled radio frequency plasma

Article in Press

Nickel–titanium shape memory alloys (NiTi) are relatively special group of metallic biomaterials. Extraordinary properties of NiTi shape memory alloys are widely employed in medical applications (orthopedics, orthodontics, urology, etc.) owing to their desirable properties, such as superelasticity, relatively low modulus and good corrosion resistance. Furthermore, toxicity and carcinogenesis of Ni ions released from NiTi...

Author(s):Fayez Mahmoud El-Hossary, Sayed Mohammed Khalil, Magdy Abdel Wahab Kassem, Medhat Abed EL Lateef and Khaled Lotfy

Impedance, AC conductivity and modulus analysis of bis (2-amino-4-methylpyridinium) tetrachloridozincate (II) compound

Article in Press

In this paper, we report the measurement of impedance spectroscopy for the bis(2-amino-4-methylpyridinium) tetrachloridozincate (II) compound in the frequency range 209 Hz to 5 MHz with the temperature ranging from 308 up to 368 K. The impedance plots have shown semicircle arcs at different temperatures and an electrical equivalent circuit has been proposed to explain the impedance results. Detailed analysis of the...

Author(s):M. Hamdi, R. Elwej, M. Benamira, M. Megdiche and F. Hlel

Measurement of electromagnetic fields (EMF) from mobile phone base stations in Abeokuta, Ogun State, South-Western Nigeria

Article in Press

The possible hazardous health effects of exposure of humans to electromagnetic radiations (EMR) emitted from mobile phone base station has caused concern to the general public. The concerns on the perceived negative effects of EMF radiations from mobile phone base transceivers led to agitations against the erection of base transceiver stations (BTS). Therefore, the measurement of levels of electromagnetic field (EMF)...

Author(s):Taiwo T. K., Alausa S. K., Oluwafisoye P. A., Adegbile A. A., Bayode O. P. and Ilori A. O.

Plastics: The good, the bad and the ugly

Article in Press

Plastics’ demand and consumption is on the increase since 1950s due to their unique properties. Their high use coupled with challenges in end-of-use handling and their inherent resistance to degradation has led to their accumulation in the environment, which is a matter of grave concern. This review presents a general overview of the state of knowledge of the diverse faces of plastics with special reference to...

Author(s):Kamweru Paul K.and Tindibale Edward L.

The structural properties of composites ZnS1-xCux thin films prepared by laser ablation

Article in Press

The prepared samples of thin-film composite by laser ablation method were achieved. Powders of zinc slfide with copper of weight ratios x=0, 0.2, 0.4, 0.6, 0.8wt% were mixed and then compressed by approximately 10 t. The samples were ablated by using Neodymium-YAG laser with 1000 mJ and 700 pulses obtained the plasma plume at 10-5 m bar pressure and 250°C. Results were indicated using X-ray diffraction (XRD), atomic force...

Author(s):Ali J. Khalaf and Faisal A. Mustafa

Mathematical models used in the prediction of deaths due to fire accident in Taraba State, Nigeria

Article in Press

This research is concerned with the application and comparison of mathematical models for predicting deaths due to fire accident in Taraba State. This research was carried out because it was observed that whenever fire accident occurs, it claims lives and properties. Data were collected for the period of ten (10) years from 2005 to 2014 from Fire Service Board, Jalingo, Taraba State, Nigeria. Various models, such as...

Author(s):Okorie, C. E., Dauda, A. A, Adubisi, O. D., Ben, O. J. and Mom Titus T.

Characterization prime and weakly prime left ideals in near left almost rings (nLA-rings)

Article in Press

The purpose of this paper was to introduce the notion of weakly prime left ideals in near left almost rings by studying, prime and weakly prime left ideals in near left almost rings (nLA-rings). Those are extended from prime and weakly prime ideals, respectively. Some characterizations of prime and weakly prime left ideals are obtained. Moreover, the relationships between prime and weakly prime left ideals in nLA-rings...

Author(s):Pairote Yiarayong

Page 1 of 2, showing 50 records out of 59 total, starting on record 1, ending on 50

< previous12