Design of fast fault tolerant reversible signed multiplier
April 2012
Reversible logic circuits are emerging as a promising technology for power minimization. Parity preserving reversible circuits design will be very important for development of fault tolerant reversible systems in nanotechnology. In this paper, a fast fault tolerant reversible signed multiplier is proposed. In order to construct the multiplier, five variables parity preserving gate (F2PG) and modified...
Multimedia physical feature for unsteady MHD mixed convection viscoelastic fluid over a vertical stretching sheet with viscous dissipation
April 2012
A multimedia feature for unsteady magnetic hydrodynamic (MHD) flow of two-dimensional mixed convection flow of an incompressible viscoelastic fluid over a vertical stretching sheet with viscous dissipation was studied. Similar transformation and an implicit finite-difference method were used to analyze the present problem. The numerical solutions of the flow velocity distributions, temperature profiles, the...
Screening of agricultural waste for Ni(II) adsorption: Kinetics, equilibrium and thermodynamic studies
April 2012
This study reports the adsorption of Ni(II) ions onto waste powders prepared from egg plant (EGP), sweet potato (SWP) and banana peels (BNP). The influence of adsorption parameters, such as pH, contact time, adsorbent weight, adsorbate concentration and temperature were investigated. Equilibrium was described by the Langmuir and Freundlich models. Ni(II) uptake was very fast reaching a maximum within 20 min...
Full-diversity high-rate space-time block-coded systems using estimated channel state information for symbol detection
April 2012
In this paper, the frame-error-rate (FER) performance of full-diversity high-rate space-time block-coded (STBC) system is presented for quadrature phase-shift keying (QPSK) digital modulation technique, which is using the numeric-variable-forgetting-factor (NVFF) least-squares (LS) algorithm based channel estimator. The STBC transmission data-rates with two-transmitter antennas...
Conditions of numerical semigroups having maximal or almost maximal length
April 2012
In this paper, we will give some conditions for a numerical semigroup to have maximal or almost maximal length or to be Arf . For obtaining these conditions, we will use the type sequences and , in cases and , where for , respectively. Key words: Arf semigroup, numerical semigroup, type sequence, maximal Length.
Mixed intelligent optimization algorithm (MIOA): An algorithm for quality of service (QoS) based web service selection
April 2012
With the rapid growth of abundant Web services on the World Wide Web, designing effective approaches for Web service selection, which satisfy service consumers’ customized quality of service (QoS) requirement, has become a fundamental problem for the application of composed Web service. To address this problem, we propose, in this paper, a new algorithm, called Mixed Intelligent Optimization Algorithm...
Identification and non-linear control strategy for industrial pneumatic actuator
April 2012
In this paper, a combination of nonlinear gain and proportional integral derivative (NPID) controller was proposed to the trajectory tracking of a pneumatic positioning system. The nonlinear gain was employed to this technique in order to avoid overshoot when a relatively large gain is used to produce a fast response. This nonlinear gain can vary automatically either by increasing or decreasing depending on...
The effects of adhesive thickness, surface roughness and overlap distance on joint strength in prismatic plug-in joints attached with adhesive
April 2012
The aim of this study is to determine the effects of surface roughness, adhesive thickness and overlap distance on the joint strength in prismatic plug-in joints combined with adhesive. For this purpose, samples produced in three different types of overlap distance, three different types of adhesive thickness and three different types of surface roughness were attached by three different widely used...
Detection of urban irregular development and green space destruction using normalized difference vegetation index (NDVI), principal component analysis (PCA) and post classification methods: A case study of Saqqez city
April 2012
Due to inappropriate planning and management, accelerated urban growth and tremendous loss in land, especially green space, have become a great challenge for sustainable urban development. Detection of such changes may help decision makers and planners to understand the factors in land use and land cover changes in order to take effective and useful measures. Change detection is a technique used in remote...
Chaotic time series prediction and Mackey-Glass simulation with fuzzy logic
April 2012
The present study was performed with fuzzy logic (FL) time series prediction modeling on a twenty years hourly averaged wind data, that is, 1985 to 2004 for Quetta, Pakistan. A free fuzzy logic design was followed and hourly wind data for spring prediction were obtained (February, March and April). It was found that the prediction is reliable and precise. Non-stationarity or random walk in wind data exists...
Effect of prismatic elements as bed roughness on hydraulic jump characteristics
April 2012
The roughness bed represents structures that produce high energy dissipation. The objectives of the present experimental study were to determine the effects of using prismatic elements for two types of bed roughness, strip and staggered, on fundamental characteristics of the hydraulic jump, including sequent depth, length and energy dissipation capacity. Experiments were conducted for both smooth and rough...
Soil loss and erodibility factor for improving conservation specification design in Southwestern Taiwan
April 2012
The characteristics of the soil topography are usually influenced by the distribution of rainfall in typhoon season, steep terrains and fragmental geology; as a result, severe soil erosion often occurs in Taiwan. The aim of this study was to evaluate the relationship between the rainfall event and soil erodibility factor by collecting fifty nine measured erosion data from nineteen experimental sites among the...
Moderately intense geomagnetic storms and their relation with coronal mass ejections and interplanetary magnetic field
April 2012
An investigation of moderately intense geomagnetic storms (50 nT>Dst≥-150 nT) observed between 1997 and 2007 with coronal mass ejections (CMEs) and interplanetary magnetic field was carried out. We found that 54.91% geomagnetic storms are associated with halo and partial halo coronal mass ejections. The association rates of halo and partial halo coronal mass ejections were found to be 63.16 and 36.84%...
A study on the deconfined degree of freedom (g1) and the running coupling constant ()
March 2012
The quark-gluon plasma is a novel state of matter in which quarks are no longer confined to bound states such as baryons and mesons. the freezing of quark–gluon deconfined degrees of freedom is the essential ingredient in determining the conditions in a transition between phases that has time to develop into equilibrium. The degree of freedom in the confined hadronic matter phase and...
Prevalence of iron deficiency in adult population: A case study from Khyber Pakhtunkhwa (KPK), Pakistan
March 2012
Iron deficiency (ID) is the most common cause of nutritional anaemia in world and it is recognized as a major public health problem throughout the globe, especially in the developing countries. Infants, young children and pregnant women are most frequently affected by iron deficiency, which is the most commonly form of nutritional deficiency. The aim of present study was to determine iron deficiency anaemia...
Rule based fuzzy logic (FL) time series prediction
March 2012
The singleton and non-singleton type-1 back propagation (BP) designed sixteen rule fuzzy logic system (FLS) on hourly averaged wind data for the years 1985 to 2004 are studied. The BP designed 16 rule non-singleton-type-1 FLS was found relatively a better forecaster than singleton-type-1. There are too many hidden or unraveled uncertainties, such as non-stationarity and stable attractors. These uncertainties...
Analysis of noise levels in corrugated board factories
March 2012
Increasing demand for goods due to population growth, national and international competition and developing technology result in intensive machine usage. Increasing usage of machinery may cause noise pollution in our environment and may adversely affect employees, leading to physiological and psychological problems. Recently, national and international environmental regulations have become widespread, due to...
Multilevel input signal for multivariable state-space identification of wastewater treatment plant
March 2012
The purpose of this work is to identify a linear time-invariant dynamic model of wastewater treatment plants with multilevel pseudo random signals as an excitation input. The plants naturally aim to remove suspended substances, organic material and phosphate. An activated sludge process becomes the best technology available to control the discharge of pollutants. For this purpose, state-space models that...
Effect of Twist Drill Bit and Feeding Speed on Air Dust During Boring Process of Solid Wood and Wood-Based Composite Panels
March 2012
A study was carried out to analyze the particles produced during drilling process with twist drills with one and two spirals (length 70 mm, diameter 8 mm) with different feeding speeds, executed in beech (Fagus sylvatica), pine (Pinus sylvestris) and oak (Quercus petraea) woods, and also, medium density fiberboard (MDF), particleboard and poplar plywood panels. Drilling of solid woods was performed by...
Porous and non-porous electrospun fibres from discarded expanded polystyrene
March 2012
In this study, we report the electrospinning of expanded polystyrene (E-PS) in xylene and tetrahydrofuran to produce microfibres. The aim is to develop a viable technique for waste polystyrene electrospun fibers for various applications. The E-PS was dissolved in xylene and tetrahydrofuran (THF), spun at voltage range of 10 to 28 kV keeping the spinning distance constant. The E-PS was characterized with...
Nonlinear dynamic analysis and chaos control for third order sub-harmonic in a ferroresonant circuit
March 2012
In this paper, the nonlinear dynamics of a non-autonomous system model for third order sub-harmonic in a basic ferroresonant circuit are analyzed in details, including phase trajectory, Poincaré map, bifurcation diagram, dissipativity analysis and Spectrogram map. Furthermore, a sliding mode controller of the system is designed and both theory analysis and numerical simulation are presented,...
Micro and nano thermal flow characteristics of a flat plate heat pipe heat spreader
March 2012
The present study investigates the characteristics and heat transfer performance of a flat heat pipe (FHP) heat spreader with various wick structures. A flat heat pipe heat spreader exemplifies successful heat transfer applications for highly efficient devices in space, energy technology, electronics cooling etc. The present experimental and simulation results reveal the heat transfer characteristics of a...
Study of high power light emitting diode (LED) lighting system in accelerating the growth rate of Lactuca sativa for indoor cultivation
March 2012
The experimental study of indoor cultivation using high power light emitting diode (LED) lighting system to accelerate the growth rate of Lactuca sativa plant is presented in this article. A novel high power LED lighting system with the use of aluminum indium gallium phosphide (AlInGaP) and indium gallium nitrate (InGaN) LEDs to produce photosynthetically active radiation (PAR) light source required...
Development of 0.5 HP induction motor with reduced slots in rotor and stator core and its performance evaluation
March 2012
In this paper, we have developed a new prototype of 0.5 hp induction motor with reduced slots in rotor bar and stator core in comparison to the conventional induction motor. The conventional induction motor usually uses 30 slots of aluminum rotor bar and 36 slots in the stator core. In our developed prototype, we used 10 slots of copper rotor bar and 24 slots in the stator core. In order to evaluate the...
Rheological and electrokinetic properties of carboxymethylcellulose-water dispersions in the presence of salts
March 2012
The purpose of this work is to investigate the effect of the addition of salts in the form of calcium chloride, sodium chloride and potassium chloride on the rheological and electrokinetic properties of diluted sodium carboxymethylcellulose (Na-CMC) dispersions (0.50%). The rheological data of a water-CMC-salt system were obtained using coaxial cylinder viscometer covering a wide range of shear...
Certain subclasses of analytic functions
March 2012
The aim of present paper is to define certain subclasses of analytic functions in connection with the convolution operator. Moreover, some inclusion relationships, radii problems and a sharp coefficient bound have been successfully derived. These innovations are of extreme importance for a wide range of physical problems. Results are very encouraging. Key words: Bounded boundary and...
Weighted pseudo almost periodic solutions for differential equations involving reflection of the argument
March 2012
By means of the fixed point methods and the properties of the weighted pseudo almost periodic functions, the existence and uniqueness of weighted pseudo almost periodic solutions are obtained for differential equations involving reflection of the argument. Key words: Almost periodic functions, weighted pseudo almost periodic functions, fixed point methods, differential equations,...
Design of fuzzy algorithms locomotion for six legged walking robot
March 2012
One of the most relevant topics in the design of legged robots is to perform movements. The aim of this article is to present a set of algorithms that allow a six-legged walking robot to achieve the mobility of its different legs among irregular or no established actions, this gait is known as: free locomotion. The development of these algorithms using fuzzy logic allows the system to have a redundant...
Morphology and properties of radio frequency (RF) sputtered cobalt thin films
March 2012
Cobalt (Co) films prepared by radio frequency (RF) sputtering for 5 to 55 min were studied by atomic force microscopy (AFM) and vibrating sample magnetometry. The root mean square surface roughness quantified from 1 ´ 1 µm2 AFM images tended to increase with increasing sputtering time above 20 min. Compared to hysteresis loops in the case of perpendicular magnetic field, the ferromagnetic Co...
Investigation of channel shear connectors for composite concrete and steel T-beam
March 2012
This paper evaluates the behavior of channel shear connectors, embedded in a concrete slab, with different concrete materials. The results of a series of limited push-out specimens were presented and discussed. The push-out tests comprise of channel shear connectors in different types of concrete. Reinforcement was included in some specimens, as well. The results showed that using reinforcements in concrete...
Experiments on hydraulic relations for flow over a compound sharp-crested weir
March 2012
Basic experiments were conducted in a near full-scale compound sharp-crested weir. The compound sharp-crested weir composed of a trapezoidal weir, sloping crests and a rectangular weir. Detailed velocity measurements were performed for the effects of the compound weir geometry on the flow velocity distributions and the kinetic energy correction factors. Furthermore, a theoretical discharge equation for the...
Effects of deforestation on soil major macro-nutrient and other selected chemical properties of secondary tropical peat swamp forest
March 2012
Development of agriculture and economic sector has become a subject to the current deforestation of tropical wetland region. The aim of the present study was to investigate the effect of deforestation on secondary tropical peat swamp forest (TPSF) by comparing macro-nutrients and others selected peat soil chemical properties of secondary TPSF and deforested secondary TPSF site. Peat soil samples were collected from...
Hybrid Control for an Overhead Crane
March 2012
One of the common industrial structures that are used widely in many harbors and factories are overhead crane. Overhead cranes are usually operated manually or by some conventional control methods. In this study, a new combination of nonlinear backstepping scheme with fuzzy system is presented to control both position regulation and anti-swing control to avoid collision with other equipments. This...
Pyrimidine derivatives as environmentally-friendly corrosion inhibitors: A review
March 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 surface....
Peristaltic flow of Maxwell fluid in an asymmetric channel with wall properties
March 2012
This study is concerned with the peristaltic motion of a Maxwell fluid in an asymmetric compliant channel. The channel asymmetry is created because of peristaltic wave trains of different amplitudes and phases on the channel walls. Mathematical model of the governing problem is first presented and then important phenomenon of "mean flow reversal" is examined. The variations of the interesting parameters...
Cyclotron production of 89Zr: A potent radionuclide for positron emission tomography
March 2012
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...
Hematological parameters in idiopathic intracranial hypertension
March 2012
In this study, we investigated the relationship between cerebrospinal fluid (CSF) pressure and hematological parameters in twenty one idiopathic intracranial hypertension (IIH) patients recruited from the patients’ records of Duzce University and Bezmialem Foundation University Medical Faculty Hospitals between 2009 and 2011. We carried blood and CSF examinations to exclude other disorders known to cause increased...
Application of Pt-Rh complex catalyst: Feasibility study on the removal of gaseous ammonia
March 2012
The selective catalytic oxidation (SCO) of gas phase ammonia (NH3) to nitrogen and water has been proposed as an effective ammonia removal process. This study reports that the oxidation of NH3 with oxygen to form N2 was investigated by SCO using a Pt-Rh complex catalyst that was synthesized by the incipient wetness impregnation process. The catalysts were...
First-principles study on La-doped ZnO used as transparent electrode for optoelectronic device
March 2012
A systematic study on electronic and optical properties of wurtzite zinc oxide (ZnO) with different La-doping concentrations has been performed. The calculations are based on the first principles plane-wave pseudopotential method with the density functional theory (DFT) and the generalized gradient approximation (GGA). According to the results, the band gap of ZnO is broadened due to the increase of La-doping...
Performance analysis, design and assessment of broadband low noise amplifier (LNA) for radiometer
March 2012
The two major applications of microwave remote sensors are radiometer and radar. Lots of researches have been conducted on the various aspects of radiometer and radar but internal logical design is mostly ignored by researchers because of its digital logic and complex nature. This paper focus on radiometer from a design point of view and a low noise amplifier is designed and proved mathematically to ensure the high...
Development of robust electrooculography (EOG)-based human-computer interface controlled by eight-directional eye movements
March 2012
Electrooculography (EOG) signal is one of the useful electro-physiological signals. The EOG signals provide information about eye movements that can be used as a control signal in human-computer interface (HCI). Usually, eight-directional movements, including up, down, right, left, up-right, up-left, down-right and down-left, are proposed. Development of the EOG signal classification has been shown more increasing...
A new approach for improving lifetime in wireless sensor networks based on distributed learning automata
March 2012
In wireless sensor networks, due to the strict resource limitations, consumption energy has becomes the most challenging issue. Decreasing consumption energy has a direct impact on increasing the lifetime of wireless sensor networks; data aggregation was put forward as an essential paradigm for wireless routing in sensor networks. The idea is to combine the data coming from different sources, eliminating redundancy,...
Cu(II) and Fe(III) complexes of sulphadoxine mixed with pyramethamine: Synthesis, characterization, antimicrobial and toxicology study
March 2012
Two new mixed ligands metal complexes of sulphadoxine and pyramethamine were prepared by using CuCl2.6H2O and FeCl3.6H2O. The complexes were characterized by elemental analysis, melting point determination, molar conductivity, metal content analysis (AAS), IR, magnetic susceptibility measurements and UV-Visible spectroscopy. Based on the analytical and spectroscopic data, the complexes were proposed to have...
Green Information Technology (IT) framework for energy efficient data centers using virtualization
March 2012
The increasing demand for storage, networking and computation has driven the escalation of large complex data centers, the massive server farms that run many of today’s Internet, financial, commercial and business applications. A data center can comprise many thousands of servers and can use as much energy as a small city. The massive amounts of computation power required to drive these server systems...
Synthesis and preliminary characterization of polyethylene glycol (PEG)/hydroxyapatite (HAp) nanocomposite for biomedical applications
March 2012
Currently, composite materials have gained momentum in the field of orthopedics and maxillofacial surgery. Among the composite materials, ceramic/polymer possesses significant advantages of high mechanical reliability and excellent biocompatibility for applications in load bearing areas. In this work, polyethylene glycol (PEG)/hydroxyapatite (HAp) nanocomposites of varying weight percentages were synthesized...
A novel method for improving the efficiency of automatic construction of ontology from a relational database
March 2012
With the development of the semantic web, ontology is playing an increasingly important role in many research areas such as semantic interoperability and knowledge base. However, constructing ontology manually is complicated and needs the supports of domain experts in knowledge acquisition as well, so it is time-consuming, error-prone and tedious-work. Learning ontology from existing resources is a good...
A technique to overcome the problem of small size database for automatic speaker recognition
March 2012
Modeling a system by statistical methods needs large amount of data to train the system. In real life, such data are sometimes not available or hard to collect. Modeling the system with small size database will produce a system with poor performance. In this paper, a method for increasing the size of a speech database is proposed. The method works by generating new samples from the original samples, using...
A new method based on distributed learning automata for page ranking in web
March 2012
With the growing information in the web, ranking algorithms is very important in searching information. Currently, there are two categories of the ranking algorithm based on contentand connectivity. Ranking algorithms which are based on content have low accuracy and recall and also contain the rank spamming problem. Ranking...
Vibration analysis in the design and construction of an acoustic guitar
March 2012
One of the main problems encountered in developing and building an acoustic guitar is to establish a formal methodology that allows us to observe the impact of some parameters involved in the process. This paper propose a modal analysis in the different stages of construction, and it is performed by -a finite element analysis of the soundboard of the instrument according to the relationship that that have...
NMR and NBO calculation of benzimidazoles and pyrimidines: Nano physical parameters investigation
March 2012
Six theoretical methods were used for the calculation of physical parameters for derivatives of pyrimidines and benzimidazols. We used Gaussian 98 at NMR and NBO calculations by using HF method with 6-31G, 6-31G* and 6-31+G basis set and B3LYP, BLYP and B3PW91 methods with 6-31G basis set. Chemical shift was drawn curve for all of the atoms in each molecule. The thermo chemical parameters including thermal...
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