The stored heat in a solar pond for salt production in Northeast Thailand
May 2012
This research presents the experimental study of heat extraction from solar pond with thermosyphonic coils for salt production in Northeast Thailand. The solar pond has an area of 30 m3. The thermophonic coil consisted of 15 U-shaped high density polyethylene (HDPE) tubes with a diameter of 25.4 mm. All 15 U-shaped HDPE tubes were connected to the upper side of each element and then connected to the upper...
Pyrimidine derivatives as environmentally-friendly corrosion inhibitors: A review
May 2012
The perpetual quest for more efficient and environment friendly corrosion inhibitors remain a focal point in corrosion control. The use of organic compounds to inhibit corrosion has assumed great significance due to their vast applications in counteracting wastage of ferrous alloys. These compounds have shown great effectiveness for inhibiting aqueous corrosion due to film formation by adsorption on the metal...
Production and purification of horseradish peroxidase in Pakistan
May 2012
Horseradish peroxidase is heme containing enzyme belonging to oxidoreductases and is involved in degradation of certain recalcitrant organic compounds like phenol and substituted phenol via free radical polymerization. Peroxidase was extracted and purified from horseradish by (NH4)2SO4 precipitation, dialysis and gel filtration chromatography. Spectrophotometer was used for the assay of horseradish...
Two step growth process of iron-platinum (FePt) nanoparticles
May 2012
In this paper, FePt nanocrystals have been prepared by adding LiBEt3H to the phenyl ether solution of FeCl2. 4H2O and Pt(acac)2 precursors in the presence of oleic acid and oleylamine surfactants and 1,2-hexadecanediol as the reducing reagent at 195°C, followed by refluxing at 245°C by sol process. Similarly, Pt nanoparticles were made by adding 1, 2-hexadecanediol as the reducing reagent to the...
Groundwater exploration in the basement of Lake-Iro District-Chad, using electrical resistivity imaging approach
May 2012
The complex geological setting of groundwater systems in the Lake-Iro District (LID) gives cause for the adoption and application of a systematic methodological approach in groundwater exploration utilizing effective geophysical techniques. Among these geophysical methods, the electrical resistivity imaging (ERI) method has been found to be the most suitable for this kind of environmental...
An attempt to solve neutron transport equation inside supercritical water nuclear reactors using the Boubaker Polynomials Expansion Scheme
May 2012
In this paper, we use a polynomial scheme for solving the system of nonlinear boundary value problems associated with nuclear fission inside supercritical water nuclear reactors. The results are calculated in terms of series with easily computable components. The suggested method is applied without any discretization or transformation, but under some restrictive assumptions. To illustrate the implementation...
Generation of analytical fragility curves for Ghanaian non-ductile reinforced concrete frame buildings
May 2012
This study is on seismic safety evaluation of non-ductile reinforced concrete (RC) frame buildings in Ghana. Generic 3-, 4- and 6-storey non-ductile RC buildings were characterised for assessment. The generic buildings were designed according to British Standard (BS) 8110. The fragility curve parameters were generated using inelastic time history analyses for seismic demand and inelastic pushover analyses for...
Effects of die shape modifications on the geometrical and dimensional accuracies of cold forged AUV propeller blade
May 2012
Geometrical and dimensional accuracies are two major concerns in precision forging and they become more critical with increasing part complexity. In this study, the geometrical error of an autonomous underwater vehicle (AUV) propeller blade is quantified by comparing the blade and punch profiles. The nominal geometry of the blade is compared to the blade profile measured using the optical...
Water stress effect on spring rapeseed cultivars yield and yield components in winter planting
May 2012
Since the most widespread limiting factor in agricultural production is water stress, a two year field experiment was carried out in Karaj, Iran during 2008 to 2010 growing seasons to assess the effect of water stress on yield and yield components of spring rapeseed (Brassica napus L.) cultivars in winter planting to find the most tolerant cultivars. The experiments was laid out in a...
A study on determination of the factors affecting dwelling choice: Düzce Toki housing area, Turkey
May 2012
The aim of this study is to define the factors affecting the choice of dwelling and to analyse the effect of user properties. For this purpose, a questionnaire was conducted to 215 users chosen randomly in the dwelling built by Düzce TOKÄ°. The gained data were transferred to computer environment with SPSS 16.00 program, and factor and variance analyses was carried out. At the end of the factor analysis,...
A new approach to Kudryashov’s method for solving some nonlinear physical models
May 2012
In this paper, we give a new version of the Kudryashov's method for solving non-integrable partial differential equations in mathematical physics. Some exact solutions including 1-soliton and singular soliton solutions of the equation with generalized evolution and time dependent damping and dispersion are obtained by using this new approach. Key words: equation with...
The effect of heat treatment on some chemical properties and colour in Scots pine and UludaÄŸ fir wood
May 2012
Heat treatment is often applied to some wood species to improve the dimensional stability of the wood. In this study, the effects of heat treatment on the colour of Scots pine (Pinus sylvestris L.) and UludaÄŸ fir [Abies Nordmanniana (Stev.) subsp. Bornmuelleriana (Mattf.)] were examined. These species have a high potential for industrial usage and are found on large...
Performance of date palm fibres reinforced plaster concrete
May 2012
This paper describes an investigation on the use of a new composite construction material composed of plaster, sand, crushed gravel and date palm fibres of waste agriculture peels, having mechanical properties potentially useful in technical domains. Thermal conductivity and some mechanical and physical properties are investigated. The results showed that the incorporated vegetable...
Synthesis and characterization of hydroxyapatite nanocrystal and gelatin doped with Zn2+ and cross linked by glutaraldehyde
May 2012
Different nanocrystals of hydroxyapatite-[HAp]-gelatin [GEL], HAp/GEL/Glutaraldehyde (GA), HAp/GEL/Zn and HAp/GEL/GA/Zn were prepared using the biomimetic process. The nanocrystals were characterized by Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction analysis (XRD). The FT-IR spectra of HAp/GEL nanocrystal materials are similar to the spectrum of real...
Two-dimensional simulation of flow pattern around a groyne using semi-implicit semi-Lagrangian method
May 2012
In this article, a numerical model was obtained in a two dimensional flow pattern simulation around a groyne. The model approximates the depth-averaged, shallow water equations with a finite volume, semi-implicit and semi-Lagrangian representation. Runge-Kutta scheme was used for departure point determination. The results showed that numerical model has high stability and efficiency. Also, numerical...
Physical and geotechnical characterization of unconsolidated sediments associated with the 2005 Mbonjo landslide, Limbe, Cameroon
May 2012
Laboratory analyses of unconsolidated sediments from the ruptured zone of the 2005 Mbonjo Landslide scar were carried out to characterize and evaluate their role as contributory factors in enhancing the slide. Colour, particle size (PS) and particle size distribution (PSD), Atterberg limits [liquid limit (LL), plastic limit (PL) and plasticity index (PI)] and basic geotechnical properties [bulk density...
Geochronological dating and stratigraphic sequences of Harrat Lunayyir, NW Saudi Arabia
May 2012
Harrat Lunayyir is a basaltic volcanic field in NW Saudi Arabia. Lava flows are basaltic to basanitic in composition, and the Holocene flows are alkali olivine basalts. The volcanic field contains about 50 cones that were constructed on Precambrian crystalline rocks along an N-S axis. The dominantly basaltic lavas of Harrat Lunayyir have been divided based on their erosion characteristics into two...
Rigorous version of ınfinitesimal deformation approach to the crystallography of fcc ® bcc martensitic phase transformation observed in Fe-31 wt % Ni and zirconia alloys
May 2012
Following the mathematical approach of Kelly (2003), rigorous version of infinitesimal deformation approach (ID) was applied to analyze fcc ® bcc martensitic phase transformation observed in Fe-31wt% Ni alloys considering the twinning shear system as the lattice invariant system (LIS). The expressions for crystallographical parameters associated with the martensitic phase transformation such as habit...
Low cost front-end readout electronic for instrumentation used in neutron experiments
May 2012
In the field of material characterization, the neutron scattering technique is found to be useful in so many applications. This technique requires a position sensitive neutron detector (PSND) and their front-end readouts (FER) electronic to detect the position of neutron interactions. Normally, the PSND is designed for specific applications and has unique technical specifications. Therefore, it requires a...
Factors affecting implementation of hospital management information systems in Pakistan
May 2012
Information technology is not being optimally incorporated in developing countries for improving healthcare practices and the implementation problems have been so portrayed that it has further reduced investors’ confidence in hospital management information systems (HMIS). The purpose of this study was to ascertain the actual impact of various factors on HMIS in Pakistan for which an exploratory study...
Newtonian heating and magnetohydrodynamic effects in flow of a Jeffery fluid over a radially stretching surface
May 2012
The combined effects of Newtonian heating and magnetohydrodynamics (MHD) in a flow of a Jeffery fluid are analyzed in stagnation point flow over a radially stretching surface. The governing equations are modeled by invoking boundary layer analysis. The computed solution by a homotopy approach is valid in the spatial domain. Graphical results for the velocity and temperature fields are displayed and...
Transmission properties in chiral metamaterials
May 2012
Transmission properties of chiral metamaterials are investigated through the loss factor. Besides the amplitudes of transmission coefficients of right and left circularly polarized waves, the phases are the other main keys to control the refractive index and chirality of the chiral media, directly affecting the loss factor (LF). The LF is low when the phase combination of circular waves is large. This can be...
Effect of wind loading on spherical single layer space truss steel domes
April 2012
The use of space truss steel domes has been a popular choice for covering large span areas with or without internal columns. High structural stiffness and architectural aesthetics are the main reasons for the wide application of this space truss form. Using formex algebra, the geometry of ribbed and Schwedler single layer space truss domes for various rise-to-span ratios (with a constant span) are modeled....
Use of banana tree residues as pulp for paper and combustible
April 2012
The aim of this work is to characterize banana tree residues and use it in pulping and combustion processes. The soda-anthraquinone pulping of the banana tree residues can be simulated by polynomial models, and then predict the pulp properties (yield, Kappa number, viscosity and brightness) as a function of operating variables (temperature 160 to 180°C, time 40 to 60 min and soda concentration 7.5 to...
Comparative modeling of CO2 laser cutting using multiple regression analysis and artificial neural network
April 2012
In this paper, empirical modeling of surface roughness in CO2 laser cutting of mild steel using the multiple regression analysis (MRA) and artificial neural network (ANN) waspresented. To cover wider range of laser cutting parameters such as cutting speed, laser power and assist gas pressure as well as to obtain experimental database for MRA and ANN model...
A comparison between the variational iteration method and Adomian decomposition method for the FitzHugh-Nagumo equations
April 2012
In this work, the variational iteration method and the decomposition method are used to determine the solutions of the FitzHugh-Nagumo (FN) equations. The two algorithms are illustrated by studying an initial value problem. The obtained results show that only few terms are required to deduce approximated solutions which are found to be accurate and efficient. Key words: FitzHugh-Nagumo...
The partial eigenvalue assignment for non-symmetric quadratic pencil in multi-input case
April 2012
In this paper, we propose a parametric solution to the partial eigenvalue assignment problem by state feedback control for non-symmetric quadratic pencil in multi-input case using orthogonality relations between eigenvectors. Our solution can be implemented with only a partial knowledge of the spectrum and the corresponding eigenvectors of non-symmetric quadratic pencil. We show that the number of eigenvalues...
Solutions of time-fractional reaction-diffusion equation with modified Riemann-Liouville derivative
April 2012
In this article, a new application of fractional variational iteration method (FVIM) has been used for solution of nonlinear fractional reaction-diffusion with modified Riemann-Liouville derivative. A new application of FVIM was extended to derive analytical solutions in the form of a series for these equations. It is indicated that the solutions obtained by theFVIM are reliable and effective method...
An interactive evolutionary approach to designing novel recommender systems
April 2012
Recently, recommender systems have been widely used in e-commerce websites to help customers discover items they want. Since a recommender system should be able to provide users with helpful information regarding items that might interest them, the ability to immediately respond to changes in a user’s preference is a valuable asset of the systems. Thus, this work presents a novel recommender system that...
Temperature effects on iodine catalysed dimerization of fluted pumpkin (Telfairia occidentalis) seed oil
April 2012
In this work the effects of temperature on the dimerization of pumpkin seed (Telfairia occidentalis) oil was investigated and the dependence of dimer yields on reaction temperature and time was determined. Pumpkin seed oil (2283.75 g) was solvent extracted from seeds of the fluted pumpkin (Telfairia occidentalis), using petroleum ether (60 to 80°C). Samples of the oil were dimerized at varying...
Muon catalyzed fusion in the target H-T/D2/H-D by taking fast muon conversion
April 2012
In past years, two/three-layer hydrogen targets with a composition of H/D/T at temperature ~3K have been studied for muon catalyzed fusion. Several theoretical and experimental studies have evaluated that the conversion efficiency of fast muons in such targets is very low. Here, the muon cycling coefficient has been determined for the heterogeneous target of by taking the conversion...
Process analysis of electroless copper plating for AB5-type hydrogen storage alloy using support vector regression
April 2012
Surface modification is an effective method to improve the electrochemical property of hydrogen storage alloy. In order to investigate the influence of process factors of electroless copper (Cu) plating for AB5-type hydrogen storage alloy on Cu coating mass, a novel modeling approach, support vector regression (SVR) combined with particle swarm optimization (PSO), was proposed to...
Studies on adhesive properties of polypropylene (PP) and polycarbonate (PC) film surfaces using DC glow discharge plasma
April 2012
Direct current (DC) glow discharge plasma has been used to increase the adhesive properties of polypropylene (PP) and polycarbonate (PC) film surfaces and make them suitable for technical applications. The modified surfaces were characterized by contact angle, atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) analysis. Also, improved adhesion properties were analyzed using T-Peel...
Using a gas-filled detector in a rotation modulation collimator system for near-field imaging
April 2012
Extracting 226Ra from sand filter samples using MnO2 impregnated resin and determination by sector field inductively coupled plasma mass spectrometry
April 2012
An analytical procedure was proposed for the determination of 226Ra at ultratrace levels in sand filters using sector field inductively coupled plasma mass spectrometry (ICP-MS). Radium was pre-concentrated using an impregnated manganese dioxide filter and separated from strontium using Eichrom“Sr-resin.” Following the extraction chromatography, polyatomic ions of Pb and W were eliminated by...
Characterizations of fuzzy intra-regular Abel-Grassmann's groupoids
April 2012
Mostly, models of real life problems are consist of uncertainties. Fuzzy set theory is one of the tool for handling such uncertainties and for applications of fuzzy set theory we have used non-associative algebraic structure namely AG-groupoids. Specifically, we have discussed the -fuzzy left ideals,-fuzzy ideals, -fuzzy semiprime ideals and -fuzzy bi-ideals in an AG-groupoid. We have...
A relativistic model for the light baryon masses in hypercentral potential and spin-flavor dependence
April 2012
In this paper, we studied the light baryon resonances spectrum within a relativistically quark model based on Dirac equation and generalized Gürsey Radicati mass formula (GR). For exact solving of the Dirac equation for our proposed hypercentral confining potential analytically, we used the Ansatz approach. The results of our model show that the light baryons spectrums are fairly well reproduced,...
Investigation of the CuInSe2 film prepared by one-step electrodeposition
April 2012
In this research, we applied one-step electrodeposition to fabricate CuInSe2 films. Deposition parameters, including the pH value of the plating solution, the deposition time and the current density, were adjusted to find preferable conditions to fabricate high quality CuInSe2 film. Material properties were examined by X-ray diffraction (XRD), scanning electron microscope (SEM) images and energy...
Evaluation of Turkish black amber: A case study of Oltu (Erzurum), NE Turkey
April 2012
Turkish black amber named OltutaÅŸi in Turkish is one of the best examples of semi-precious stone to be found in the world. It is mainly extracted in the county of Oltu (Erzurum) and surrounding mountains, NE Turkey since the 18th century. At the present time, it is known as ornamental stone and its rosary is very famous worldwide. However, there is no modern review of geological properties of the OltutaÅŸi...
Brain emotional learning based intelligent controller for stepper motor trajectory tracking
April 2012
Excellent attributes of permanent magnet stepper motor (PMSM) make it prominent in robotic, aerospace, and numerical machine applications. However, the problem of nonlinearity and presence of mechanical configuration changes, particularly in precision reference trajectory tracking, must be put into perspective. In this paper, a novel cognitive strategy based on the emotional learning in limbic system of...
Comparative study of distributed implementation using Tuple space technology of two t-way test suite generation strategies
April 2012
This paper highlights a comparative study of two new distributed t-way test suite generation strategies, called test suite generator one parameter (TS_OP) and test suite generator one test (TS_OT). Both strategies adopt computational greedy algorithm and were implemented on distributed shared memory environment using Tuple space technology. To characterize the behavior of both strategies in term of...
Fuzzy B-spline algorithm for 3-D lineament reconstruction
April 2012
Lineaments are vital geological features that play the role of a key indicator for ground water and petroleum searching. At present, there is no study that has utilised remote sensing satellite data to reconstruct three dimensional (3-D) lineament visualization in the Uinted Arab Emirates (UAE). This work aimed at reconstructing a (3-D) lineament visualization from multispectral remote sensing...
Spatial distribution of maximal earthquake effects in the Red Sea region
April 2012
Two maps of estimated maximum intensity distribution have been prepared for the Red Sea region by applying appropriate intensity attenuation and conversion equations, without considering the probability of exceedance. The maps are represented in two parametric elements, which are: the maximal earthquake effects and the period of observation. The significance of these maps is due to their contributory aspect...
Friction and wear behaviours of medical grade UHMWPE at dry and lubricated conditions
April 2012
In this investigation the friction and wear performance of GUR 1020 medical grade ultra-high molecular weight polyethylene (UHMWPE) polymer under dry sliding, distilled water and egg albumen lubrication conditions were evaluated. The sliding experiments were carried out on a pin-on-disc tribometer. The contact configuration used was a polymer pin on a rotating AISI 304L stainless steel disc. Wear tests were...
Investigation of indium ions removal from aqueous solutions using spent coffee grounds
April 2012
This study used batch adsorption techniques to evaluate the potential suitability of spent coffee grounds as an environmentally friendly adsorbent for the removal of indium ions from aqueous solutions. In addition, we also investigated the effects of process parameters, such as, the solution pH, adsorbent dose, initial concentration of indium ions and the temperature on adsorption performance. The...
Synthesis and phase transitions studies on Schiff base symmetrical dimers: α,ω-Bis(4-pyridine-3-methyleneaminoxy)alkanes
April 2012
A series of symmetrical dimers bearing heterocyclic ring, α,ω-bis(4-pyridine-3-methylideneaminoxy)alkanes, were prepared and all the members are differed by the spacer length, CnH2n, where n = 6, 8, 10 and 12. Their transition temperatures and mesophase characteristics were studied by differential scanning calorimetry and optical polarizing microscopy techniques. DSC thermograms...
A density functional theory study on the stability and ligand properties of the different substituted phenyl carbenes
April 2012
In regard to the worldwide interest in synthesis and application of stable carbenes, DFT calculations (B3LYP/6-311++G**//B3LYP/6-31+G* levels) are employed to reach at a series of phenyl carbenes. The singlet-triplet energy separations (ΔES-T), HOMO–LUMO energy gaps (ΔEHOMO-LUMO), as well as philicity indices (N and ω) and basicity of these carbenes are compared and...
The effectiveness of electrical resistivity imaging in sinkhole investigations
April 2012
Electrical resistivity methods are generally used to explore buried sinkholes and to predict dropout, sinkholes is analysed. A sinkhole of known geology is used to illustrate the limitation of vertical electrical sounding technique. Approximated geological sections of the sinkhole are modelled to investigate the effectiveness of the resistivity imaging which is considered to be two-dimensional exploration...
Design, construction and investigating functionality of a nickel (II) ion selective electrode
April 2012
Ni2+ ion–selective electrode (Ni-ISE) based on plasticized poly(vinyl chloride) (PVC) membrane with 25, 26, 27 tri propoxy 28, Amino 5, 11, 17, 23–tetra–tert–butyl–calix[4]arene as ionophore and dibutyl phthalate (DBP) as plasticizer was designed and constructed. The Ni-ISE showed a linear reply in the concentration range of 1.0 × 10-1 to 1.0 ×...
Piecewise statistical programming for workforce allocation: the significance of Taiwanese cadres in China
April 2012
This paper presents a novel study which used piecewise statistical approach to estimate the profitability of Taiwan-based corporations investing in China according to their proportion in the total numbers of Taiwanese managers. While using the SPSS statistics software to analyze and calculate the correlation between the earnings, expenditures, proportion of Taiwanese cadres and net profits, it was found that...
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