February 2012
Optimal path planning of mobile robots: A review
Mobile robots are increasingly used in automated industrial environments. There are also other applications like planet exploration, surveillance, landmine detection, etc. In all these applications, in order that the mobile robots perform their tasks, collision-free path planning is a prerequisite. This article provides an overview of the research progress in path planning of a mobile robot for off-line as well as...
February 2012
Cyclotron production of 89Zr: A potent radionuclide for positron emission tomography
In the present study, zirconium-89 (T1/2 = 3.27 day, Iβ+ = 23%, Eβ+ = 0.897 MeV) was produced through the 89Y(p, n) nuclear reaction at the Agricultural, Medical and Industrial Research School (AMIRS) Cyclotron (Cyclone-30, IBA, Belgium), irradiating Y2O3 with 15 MeV proton beam energy and 20 µA current for 20 min. The experimental yield of about 69.77 MBq 89Zr per µAh...
February 2012
Pattern recognition technique for integrated circuit (IC) pins inspection using wavelet transform with chain-code-discrete fourier transform and signal correlation
This paper proposes a new technique for recognizing integrated circuit (IC) pins in an IC chip. The proposed technique applies the wavelet transform and discrete Fourier’s transform to extract the interesting features for classifying the IC pin pattern. The accuracy and inspection time of the proposed method are investigated by comparing with other pattern recognition techniques such as full template...
February 2012
Flow of a binary mixture of fluids in a semicircular duct
The purpose of this work is to examine the flow of a binary mixture including chemically inert incompressible Newtonian fluids in a duct of semicircular cross-section. Such a flow model has great significance not only of its own theoretical interest, but also for application to various engineering processes. The governing equations have been solved analytically using the finite Fourier sine and Hankel transforms for the...
February 2012
Finite element method for simulation of Tsunami run-up from QuikiBird satellite data
In this paper, work was carried out to simulate three-dimensional (3-D) tsunami run-up from high resolution remote sensing satellite data of QuickBird. In doing so, the tsunami wave spectra are extracted from QuickBird data using two dimensional di Fourier transform (2-DFFT). The tsunami propagation equation was then solved based on the standard Galerkin finite element approach to simulate 3-D tsunmai run-up. The...
February 2012
An investigation of porosity and magnetohydrodynamic flow of non-Newtonian nanofluid in coaxial cylinders
The magnetohydrodynamic (MHD) flow of third grade nanofluid between coaxial porous cylinders was investigated in this work. Two types of series solutions were presented for constant and variable viscosity. The resulting nonlinear coupled equations were solved by employing homotopy analysis method (HAM). The convergence of the series solutions has been discussed explicitly. The recurrence formulae for finding the...
February 2012
Design and analysis of 45 nm low power 32 kb embedded static random access memory (SRAM) cell
In sub-100 nm generation, gate-tunneling leakage current increases and dominates the total standby leakage current of LSIs based on decreasing gate-oxide thickness. Showing that the gate leakage current is effectively reduced by lowering the gate voltage, we propose a local DC level control (LDLC) for static random access memory (SRAM) cell arrays and an automatic gate leakage suppression driver (AGLSD) for...
February 2012
A study of linear and non-linear relations between accounting variables and share return of automobile industry: Some Iranian angles
The present study deals with the evaluation of linear and non-linear relations between accounting variables and share return in automobile industry in Iran. The accounting variables under examination include three variables of operational profit, net profit and cash flows resultant from the operation. The regression analysis has also been used for testing the existence of a relation between variables and significance of...
February 2012
Kinetic, equilibrium and thermodynamic studies of the biosorption of Ni(II), Cr(III) and Co(II) from aqueous solutions using banana (Musa acuminata) leaf
The biosorption of Ni(II), Cr(III) and Co(II) by banana (Musa acuminata) leaf is reported in this work. The effects of solution pH, contact time, initial metal ion concentration and temperature on the biosorption of the metal ions were investigated. Optimum pH for each metal ion was obtained because the biosorption of each of the metal ions was found to be pH-dependent. Kinetic study shows that the pseudo-second-order...
February 2012
Removal of cobalt (II) ions from aqueous solution by using alternative adsorbent industrial red mud waste material
This study on the removal of cobalt ions from aqueous solutions by red mud was conducted in batch condition. Its objective was to investigate the possibility of using red mud waste material as an alternative to high cost commercial adsorbent materials for the removal of cobalt from aqueous solution. In this study, batch experiments were carried out for the adsorption of cobalt onto red mud industry waste. The red...
February 2012
Stabilization of organic soil using sodium silicate system grout
Cation binding by organic matter content (OMC) in soils has consequences for the behaviour of the organic compounds themselves, influencing adsorption, aggregation, and solubility, and thereby soil structure, translocation of organic matter within soils, and transport to waters. The study reported here involved a number of experiments using composition of alkaline earth metals grout to treat organic soils, in order to...
February 2012
Electrochemical sensors for direct potentiometric determination of Voriconazole in pharmaceutical dosage forms and biological fluids
The compositions and general performance characteristics of four polyvinyl chloride (PVC) membrane sensors respective to Voriconazole (VR) were described. Two of these sensors are based on the use of ion association complexes of VR with phosphotungstic acid (PTA) and phosphomolybdic acid (PMA) as novel electroactive materials dispersed ino-nitrophenyloctyl ether (o-NPOE) plasticizer on glass assemblies. The third sensor...
February 2012
Differential transform method for solving partial differential equations with variable coefficients
In this paper, we consider the differential transform method (DTM) for finding approximate and exact solutions of some partial differential equations with variable coefficients. The efficiency of the considered method is illustrated by some examples. The results reveal that the proposed method is very effective and simple and can be applied for other linear and nonlinear problems in mathematical...
February 2012
Connectivity, PI and vertex-PI indices and polynomials of an infinite class of dendrimer nanostars
A dendrimer is an artificially manufactured or synthesized molecule built up from branched units called monomers. In this paper, we shall give the exact formulas for the first-connectivity, second-connectivity indices and polynomials, PI and vertex-PI indices and polynomials of an infinite class of dendrimer nanostars. Key words: Connectivity index, connectivity polynomial, PI index,...
February 2012
Bayesian analysis of the two component mixture of inverted exponential distribution under quadratic loss function
The inverted exponential distribution is studied as a prospective life distribution. A two component mixture of inverted exponential distribution is considered in this paper. The Bayes estimators and Bayes posterior risk for the unknown parameters, and mixing weight of the mixture model are derived under quadratic loss function. For comparative study of these Bayes estimates uniform, improper and...
February 2012
A Novel Optimized Design of Popularity Cushion Staggered Broadcast over Video on Demand System
Video on Demand (VOD) system is an electronic video rental system where the clients have the ability to request and view the video at any time, which makes the VOD to become an important technology with many applications. Numerous periodic VOD broadcasting protocols have been proposed to support a large number of receivers. Broadcasting is an efficient transmission scheme which provides on-demand service for very...
February 2012
Nyquist Folding Receiver for the Interception of Frequency Agile Radar Signal
This work was carried out to improve the probability of interception of frequency sweep and lower the system complexity of non-sweep mode of the electronic intelligence system for frequency agile radar signal. A low complexity receiver structure and its associated demodulation algorithm with high probability of intercept are also presented. Moreover, the applicability of this structure for the wideband radar signal is...
February 2012
Performance optimization of simultaneous machine and automated guided vehicle scheduling using fuzzy logic controller based genetic algorithm
The current trend in manufacturing technology is considered by two main items automation and flexibility. Flexible manufacturing system (FMS) is one of the most identified systems that include both automation and flexibility criteria. It comprises three principle elements: computer controlled machine tools, an automated material handling system and a computer control system. One of the automated materials handling...
February 2012
Stability of state-proportional integral derivative (PID) feedback control system with time delay
This article proposes a method to compute the maximum allowable delay time for linear-time-invariant-time-delayed-systems (LTI-TDS) with state-PID feedback control. It presents the main theorem with corollary, and computing steps to obtain Stability of a LTI-TDS with state- proportional integral derivative (PID) feedback is ensured if the delay time is less than The proposed...
February 2012
Workload management: A technology perspective with respect to self characteristics
Rapid growth in data, maximum functionality and changing behavior tends the workload to be more complex. Organizations have complex type of workloads that is very difficult to manage by the humans and even in some cases, this management becomes impossible. Human experts take much time to get sufficient experience so that they can manage workload efficiently. The versatility in workload due to huge data size and requests...
February 2012
Energy efficiency and thermal comfort influences of alternatives of single skin façade (SSF) and double skin façade (DSF) in tropical bungalow house
Sustainable design is an important goal in architecture. Sustainability could be approached with low energy and high thermal comfort buildings. In this study, a bungalow house as a BASECASE model was simulated with “DesignBuilder” software based on “Energy Plus”. Then influence of double glazing, external blind and double skin façade (DSF) on energy consumption and thermal comfort of...
February 2012
Structural health monitoring and damage assessment Part II: Application of the damage locating vector (DLV) method to the ASCE benchmark structure experimental data
This paper builds on the review of structural health monitoring (SHM) and damage assessment approaches provided in a companion paper by presenting an application of the damage locating vector (DLV) approach to the experimental (Phase II) data obtained from the experimental benchmark structure of the IASC-ASCE task group on SHM, which is a laboratory (scaled) size steel frame. Different damage conditions were simulated...
February 2012
Classification of cultivated soils in Al-Kharj, Saudi Arabia based on natural radionuclides using artificial neural networks
A great awareness of safe crop production is needed by selecting the suitable uncontaminated soil, and good seed types, etc. In this study, artificial neural network (ANN) was used to classify thirteen cultivated soils, in adjacent regions, in Al-Kharj Governorate, Saudi Arabia based on their natural radionuclide contents detected using gamma-ray spectrometer and geographical coordinates and altitude measured using GPS...
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