International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2550

Table of Content: 30 September 2011; 6(21)

September 2011

Polymer-noble metal nanocomposites: Review

Polymer-noble metal nanocomposites have been extensively investigated due to their potential ability to provide materials with novel mechanical, electronic or chemical behaviour for technological applications. Many preparative procedures have been proposed and detailed characterizations have been carried out on conducting polymer-noble metal nanocomposites; thanks to the rapid improvement in analytical techniques on...

Author(s): Olujinmi M. Folarin, Emmanuel R. Sadiku and Arjun Maity        

September 2011

Innovative countermeasure for integral bridge scour

Advantages of integral bridges include reduction of initial construction and maintenance cost. Scour was the main problem which caused the bridges to fail and collapse during heavy rain and flooding. Most of the previous studies focused on the scouring impact on conventional and traditional bridge. Very few studies investigated on scouring effects on integral bridge and its countermeasure. This paper highlighted the...

Author(s): Shatirah Akib, M. M. Fayyadh, S. M. Shirazi, Budhi Primasari and M. F. Idris      

September 2011

Integrating performance indicator analysis and comparisons in NPD process re-engineering

The purpose of the present study is to develop a strategy that integrates all output and feedback from customers (internal and external) with a view to enhancing the new product development (NPD) performance of a manufacturing company. This study combines theory and practice to develop a framework using three analytical dimensions that can be used to identify and solve the problems that arise in NPD strategy...

Author(s): Chee-Cheng Chen    

September 2011

Ammonia loss reduction, exchangeable ammonium and available nitrate retention in soil treated with urea mixed with humic acid and acid sulphate soil

Exchangeable ammonium (NH4+) could be recovered in soil by the application of humic acid (HA) and acid sulphate soil. The ability of humic acids to retain NH4+ has been demonstrated in our previous study. In that study, the effect of both acids on soil exchangeable NH4+, dry matter production and available nitrate (NO3-) was investigated.This laboratory study compared the effect of enhancing urea mixtures with HA...

Author(s): M. Y. Mohd Taufik, O. H. Ahmed and A. M. Nik Muhamad      

September 2011

Application of new reactive and disperse dye on textile dyeing, printing with acrylate Eco friendly copolymers

This research work examines the process of dyeing polyester/cotton fabrics with a highly effective fiber-reactive and a disperse dyestuffs namely, (E)-4-hydroxy-5-((4-((2-sulfophenyl)amino)-1,3,5-triazin-2-yl)amino)-3-((2-sulfophenyl)diazenyl)naphthalene-2,7-disulfonic acid and (E)-5-((4-nitrophenyl)diazenyl)pyridin-2(1H)-one, respectively in one pot processes of printing and dyeing. It gives special attention to modify...

Author(s): Abolfathe Akbarzadeh, Bahareh Kermani, Malihe Akbarzadeh Nasrabadi andHossein Najafi        

September 2011

Convection from a semi-finite plate in a fluid saturated porous medium with cross-diffusion and radiative heat transfer

The heat and mass transfer characteristics in mixed convection along a semi-infinite plate in a fluid saturated porous medium with radiative heat transfer has been investigated. Diffusion-thermo and thermo-diffusion effects are assumed to be significant. Using a similarity transformation, the governing steady boundary layer equations for the momentum, heat and mass transfer were reduced to a set of ordinary differential...

Author(s): F. G. Awad, P. Sibanda, M. Narayana and S. S. Motsa        

September 2011

Designing a model to use solar energy for heating usages of domestic constructions in Khouzestan province

In this research, the amount of solar radiation and its effect on domestic buildings of Ahvaz (the center of Khuzestan province) has been studied. To this end, we establish a model (dimension:), which has some pipes (Diameter: 1.375 Inch, Copper) on the outer surface of the roof, acting as a radiator. To absorb maximum amount of energy and being able to use the system in various latitudes, we set pipes on a movable...

Author(s): H. Asareh and A. Motamedi Nassab        

September 2011

Modeling of saturated salient pole synchronous machines in d-q axes

This paper presents the modeling of saturated salient pole synchronous machines in standard d-q axes. First, a complete synthesis of possible d-q axes models is given.Second, the salient pole synchronous machine is transformed into an equivalent smooth air gap machine, in order to apply the main flux saturation method. Third, a description of a procedure to introduce magnetic saturation in found models is...

Author(s): Mohamed Larbi Khlaifi and Habib Rehaoulia      

September 2011

Urban microzonation study for Esenler district, Istanbul, Turkey

It is necessary to prepare the microzonation maps and determine the better soil sites in settlement areas which are located on active tectonic regions. In this study, the geological, geophysical and geotechnical conditions of the Esenler district (Istanbul) were investigated and a small scales microzonation study was carried out. The northern sides of the study area generally represented by Lower Carboniferous aged...

Author(s): T. Fikret Kurnaz, Sefik Ramazanoglu and Can Karavul        

September 2011

Ricci tensors for elliptical shaped galaxies and celestial objects

Einstein's field equations are based on Riemannian geometry. One of the great important in Riemannian geometry is the curves that minimize the distance between two given points. The Ricci curvature tensors are also broadly applicable to modern Riemannian geometry and general theory of relativity (GTR). The solution of Einstein's field equations, need Ricci tensors. The line elements based on the ellipsoidal...

Author(s): Bijan Nikouravan      

September 2011

Comparative analysis of fetal electrocardiogram (ECG) extraction techniques using system simulation

This paper presents a system simulation to compare between two adaptive filters based on  recursive least square (RLS) and normalized least mean square (NLMS), in their use for fetal heart rate (FHR) monitoring. The reference and primary signals are fed simultaneously to the inputs of the RLS and NLMS adaptive filters to extract the fetal signal. Each extracted signal is postprocessed using a newly developed...

Author(s): M. M. Sheikh Algunaidi, M. A. Mohd Ali and Md. Fokhrul Islam      

September 2011

Using agents to improve the usability of the PSP automated tool

Various tools have been produced to assist personal software process (PSP) practitioners in implementing their processes, which require strong discipline from the individual software engineer. Nevertheless, most of the currently available tools still require software engineers to become involved in time-consuming manual processes and offer limited assistance. This research study presents the substantial potential for...

Author(s): Mohd Hairul Nizam Md Nasir, Salmiza Saul Hamid, Mustaffa Kamal Mohd Noor, Zarinah Mohd Kasirun and Mohd Khalit Othman        

September 2011

Fractional optimum linear receiver for quasi-static MIMO systems

The minimum mean squared error (MMSE) based linear receiver used with multiple-input multiple-output (MIMO) systems, is considered to be the optimum as it jointly cancels out noise and interference. The MMSE receiver maximizes the signal to interference plus noise ratio (SINR) and minimizes the bit error rate (BER). In this paper, the concept of fractional domain based optimum MMSE receiver is proposed. The proposed...

Author(s): Simranjit Singh, Rajesh Khanna and Manjeet Singh Patterh        

September 2011

Kinematic calibration of a parallel robot using coordinate measuring machine

In the applications of parallel robots, kinematic calibration is required to eliminate the errors resulting from the manufacturing and assembly. In this paper, a new method for calibrating a parallel robot is proposed. An error model for kinematic calibration is constructed using differential geometry method. All leg length information and pose error are obtained based on measurement results coordinate measuring...

Author(s): Dayong Yu      

September 2011

Parallel robots pose accuracy compensation using back propagation network

In order to improve pose accuracy of a parallel robot in the application, a compensator is constructed to predict leg length errors using back propagation neural network. In this method, the back propagation neural network is used with conventional inverse kinematics computation module in parallel. A back propagation neural network is designed and implemented to learn kinematic model errors for parallel robots. The...

Author(s): Dayong Yu      

September 2011

Search for critical failure surface in slope stability analysis by gravitational search algorithm

Slope stability analysis of any natural or artificial slope aims at determining the factor of safety of the slip surface that possesses the lowest factor of safety. The search for the minimum factor of safety based on limit equilibrium methods is a complex optimization problem where there are several local minima. In this paper, a newly developed heuristic global optimization algorithm, called gravitational search...

Author(s): Mohammad Khajehzadeh, Mohd Raihan Taha, Ahmed El-Shafie and Mahdiyeh Eslami        

September 2011

Visco-elastic MHD flow of Walters liquid B fluid and heat transfer over a non-isothermal stretching sheet

An analytic study has been carried on steady MHD flow and heat transfer in a visco-elastic fluid flow over a semi-infinite, impermeable and non-isothermal stretching sheet with internal heat generation/absorption in the presence of radiation. Thermal conductivity is assumed to vary linearly with temperature. The governing partial differential equations are converted into ordinary differential equations by a similarity...

Author(s): Esmaiil Ghasemi, Mahmoud Bayat and Mahdi Bayat      

September 2011

Effect of tire footprint area in pavement response studies

The necessity of incorporating realistic non-uniform measured contact stresses, tire footprint area, as well as other non-linear and viscoelastic behaviour within tire-pavement interaction have been suggested by many researchers in order to obtain more reliable pavement responses. However, modeling 3D contact stresses with distribution and other non-linear properties in common pavement design procedure seems difficult...

Author(s): Danial Moazami, Ratnasamy Muniandy, Hussain Hamid and Zainuddin Md. Yusoff      

September 2011

Determination of effective atomic number and electron density of chitin by gamma-ray attenuation

The effective atomic numbers (Zeff) and effective electron density (Ne) of chitin have been calculated using the mass attenuation coefficients (m/r) obtained via XCOM (COMpilation of X-ray Cross Sections) in the photon energy range  between 1 keV and 1 GeV. The results were compared with the measured values at the photon energy of 662, 1173 and 1332 keV. Both measured and calculated results were in good...

Author(s): I. Akkurt      

September 2011

A weak blind signature based on quantum cryptography

In general, a weak blind signature has the characteristics of no-counterfeiting, no-disavowing, blindness and traceability. In this paper, a weak blind signature scheme based on the correlation of Einstein-Padolsky-Rosen (EPR) pairs (Xiaojun et al., 2009) is revisited, and it will be shown that the scheme in its original form does not complete the task of a blind signature fairly.   Key words: Quantum...

Author(s): Mosayeb Naseri      

September 2011

Impact of land-use changes toward base-flow regime in Lui and Langat Dengkil sub-basin

Lui River and Langat-Dengkil River sub-basin are one of the large portions of Langat River catchment, known as the prime and important water source for Kuala Lumpur, Petaling Jaya, Shah Alam, Klang as well as domestic and industries usage in the Langat River basin itself. Unfortunately, the land-use change has greatly impacted the base-flow regimes particularly for the upstream area of Lui...

Author(s): Hai Hwee Yang, Othman Jaafar, Ahmed El-Shafie and Sharifah Mastura S. A.