Anti-synchronization of Liénard chaotic systems via feedback control
December 2010
Based on the Lyapunov stability theory, this paper presents the feedback controllers for anti-synchronizing Liénard systems. A sufficient condition is drawn for the robust stability of the error dynamics and the design of the controllers. Numerical simulations are performed to verify and illustrate the analytical results. Key words: Anti-synchronization, Liénard system, feedback...
Power consumption pattern based on fuzzy method
December 2010
The experience of many countries worldwide shows that one of the appropriate ways that can make power subscribers (clients) to maintain the consumption power coefficient within the allowed limit is to apply consumption partitioning by controlling electricity consumption power coefficient. In this article, a trial has been made to examine a new method in which we can limit the clients whose consumption power coefficient...
Dynamic weighted discrimination power analysis: A novel approach for face and palmprint recognition in DCT domain
December 2010
Although Discrete Cosine Transform (DCT) is widely employed to extract proper features for biometric recognition, the problem on how to select proper DCT coefficients to obtain the best discrimination effect has not been solved satisfactorily. Some approaches discard the low-frequency DCT coefficients unreasonably and rely on proper premasking window to improve performance. But there is not a uniform criterion to...
Vehicle speed detection in video image sequences using CVS method
December 2010
Video and image processing has been used for traffic surveillance, analysis and monitoring of traffic conditions in many cities and urban areas. This paper aims to present another approach to estimate the vehicles velocity. In this study, the captured traffic movies are collected with a stationary camera which is mounted on a freeway. The camera was calibrated based on geometrical equations that were supported directly...
Comparison of robust and intelligent based power system stabilizers
December 2010
Power System Stabilizers (PSS) are used to generate supplementary damping control signals for the excitation system in order to damp the low frequency oscillations (LFO) of the electric power system. The PSS is usually designed based on classical control approaches but this Conventional power system stabilizers (CPSS) has some problems. To overcome the drawbacks of CPSS, numerous techniques have been proposed in...
Tuning of power system stabilizers using particle swarm optimization with passive congregation
December 2010
Power System Stabilizers (PSSs) are the most well-known and efficient devices to damp the power system oscillations caused by interruptions. This paper introduces a novel algorithm to determine the PSS parameters, using the multi-objective optimization approach called particle swarm optimization with the passive congregation (PSOPC). The tuning of the PSS parameters is usually formulated as the objective function...
The study of the effect of protective devices performance on voltage sag due to distribution network faults
December 2010
Voltage sag is one of the most common power quality disturbances in electric networks. It is necessary to investigate voltage sag due to consumers’ vulnerability. Faults are the main cause of voltage sags in distribution networks. Fault in distribution networks according to its specifications (its location, duration and time) can cause an interruption or a voltage sag at the nodes of the network. By making random...
The effect of cure conditions and temperature changes on the compressive strength of normal and fly ash-added concretes
December 2010
The aim of this study was to examine compressive strength of fly ash-added concrete and normal concrete cured in water and air and to compare their compressive strength on the 7th, 14th, 21st and 28th days. In addition, the study investigated temperature-induced changes in the compressive strength of concrete samples which completed 28 day cure period. While the compressive strength of concretes cured in air was...
An experimental investigation of binding types of reinforcing steel rebars subjected to aggressive solutions under cathodic protection against corrosion
December 2010
Reinforcement corrosion in reinforced concrete structures results in significant reduction in durability and may cause premature failure. This study presents an experimental investigation of corrosion in reinforcing steel rebars with different binding types exposed to aggressive solutions of various concentrations under cathodic protection. The corrosion rate in the steel bars for different types of serial bindings...
A characteristic of consolidation parameters of marine clay in Busan Area – South Korea
December 2010
In this study the city of Busan was selected and investigated for a characteristic of consolidation parameters. Busan is one of representative cities in the southern coast of Korea, where main harbors are located, and many geotechnical investigations were performed due to massive harbor constructions in the past. Consolidation parameters, including pre-consolidation pressure, compression index (Cc), swelling index (Cs),...
Material properties of air-cured ultra-high-performance steel-fiber-reinforced concrete at early ages
December 2010
This study investigated the material properties of air-cured ultra-high-performance fiber-reinforced concrete (UHPFRC) at early ages. To assess the material properties of UHPFRC at early ages, compressive and three-point bending tests were respectively performed at the 10 stages of early ages on ø 100 × 200 mm cylinders and 100 × 100 × 400 mm specimens made from UHPFRC with a 2% steel fiber...
Ultimate capacity and reinforcement area requirement for bridge girder using various FRP re-bars
December 2010
An analytical study on the use of various types of fibre reinforced plastic rebars as reinforcement is presented in this paper. The structural element examined was a girder, which formed a bridge deck and was designed in accordance to the ACI code. Three types of fibres were considered in the reinforced plastic rebar, namely glass, aramid and carbon. A finite element model of the bridge girder was created using solid...
Parametric investigation on an off-centre braced frame system's stiffness
December 2010
In this paper, a particular off-centre braced (OCB) system subjected to lateral load, which induced compressive force to the brace elements is examined. This bracing system consists of three members, where the diagonal member is not straight and it is connected to the corner of the frame by a third member. The out-of-straightness of the diagonal members will introduce eccentricity to the system. This system improves the...
Reduction of data size for transmission in localization of mobile robots
December 2010
In the SLAM (Simultaneous Localization and Mapping) technology, an environmental map is generated by a mobile robot. When it results in failure, it is necessary to inspect the scene. This localization and browsing require transmission of video signal to a remote place. In the system in this paper, an indoor mobile robot has two cameras. One is the "upward" which captures scenery of ceiling. The other is...
Growth of several indigenous species in the degraded forest in the northern Vietnam
December 2010
This study was conducted in the northern mountainous region of Vietnam. Research occurred at two main sites: the Hoa Binh province and the Phu Tho province. The objective of this study was to compare growth rate and the physiological characteristics of the indigenous tree species; with the ultimate goal of selecting a suitable species for the restoration of the degraded forest area. Except for an Acacia hybrid, this...
First-principles study on electronic and optical properties of La-doped ZnS
December 2010
Using the first principle plane-wave pseudo potential method, a systematic investigation on electronic and optical properties of ZnS with and without La-doping has been performed. Calculation results show that La-doping narrows the band gap of ZnS systems and La doped ZnS system changes from semiconductor into metal through the Mott transition. Moreover, with La-doping increasing, the decrease of absorption coefficient...
Wave-like interaction, occurring at superluminal speeds, or the same, de Broglie relationship, as imposed by the law of energy conservation: Electrically bound particles (Part 1)
December 2010
Based on the law of conservation of energy, we have shown that, the steady state electronic motion around a given nucleus in a non-circular orbit depicts a rest mass variation, though the overall relativistic energy remains constant. This is, in no way, conflicting with the usual quantum mechanical approach. On the contrary, it provides us with the possibility of bridging the special theory of relativity and quantum...
Effects of exercises on bone mineral density of proximal femour region among athletes of different branches
December 2010
This study was carried out to evaluate and determine the differences in T and Z values of proximal femour (femoral neck, trochanter, intertrochanter and ward’s triangle) region bone mineral density (BMD) among high level male athletes of different branches. The study was completed with the voluntary attendance of a total of 42 uninjured male national athletes in different branches (taekwondo 12, wrestling 8, judo...
University students’ attitudes towards environmental problems: A case study from Turkey
December 2010
By this research the attitudes of university students towards environmental problems is aimed to be investigated in several variables. The study group of the research are 931 students that attend Karabük University in 2009 to 2010 Academic year. Survey model is used in that study and as a data collection tool “The Attitude Scale of Environmental Problems” which is developed by Åžama (2003) is used....
Planetary milling parameters optimization for the production of ZnO nanocrystalline
December 2010
An artificial-neural-network (ANN) model is developed for the analysis and prediction of correlations between processing planetary milling parameters and the crystallite size of ZnO nanopowder by applying the back-propagation (BP) neural network technique. The input parameters of the BP network are rotation speed and ball-to-powder weight ratio. The nanopowder was synthesized by planetary mechanical milling and the...
Modified variation of parameters method for solving system of second-order nonlinear boundary value problem
December 2010
In this paper, we use the modified variation of parameters method, which is an elegant coupling of variation of parameters method and Adomian’s decomposition method, for solving the solution system of nonlinear boundary value problems associated with obstacle, contact and unilateral problems. The results are calculated in terms of series with easily computable components. The suggested method is applied without...
Physical, chemical and biochemical properties of soil in a Korean landfill
December 2010
The objective of the present study was to examine the following aspects of soil environment in a landfill site: soil respiration and physical, chemical and biochemical properties. The K-Bad and Y-Bad sites showed lower soil respiration and higher soil temperature than the K-Good and Y-Good sites. The study results showed that increasing soil temperature up to 30°C was very closely related with increasing soil...
Impact of introducing reserve flows on abstractive uses in water stressed Catchment in Kenya: Application of WEAP21 model
December 2010
Kenya is implementing Integrated Water Resources Management (IWRM) policies. The water policy provides for mandatory reserve (environmental flow) which should be sustained in a water resource. Four out of the six main catchments in Kenya face water scarcity. Further water resource quality objectives for many rivers are yet to be determined. This study applied Water Evaluation and Planning System (WEAP21) to study the...
Tectonic features interpreted from aeromagnetic maps of Okigwe – Oguta axis, South of Benue Trough, Nigeria
December 2010
Oguta and Okigwe are landmark towns within the Benue trough that are surrounded by many physical features, which may have some tectonic implications. Aeromagnetic maps covering this study area were digitized along flight lines, electronically gridded and contoured. Other data processing techniques like spectral analysis, modeling etc were applied. The results indicated that the study area is characterized by low...
Non-destructive evaluation of concrete by the quality factor
December 2010
Measurement of the longitudinal P-wave propagation velocity is a commonly used test for the non-destructive evaluation of concrete. However, the pulse velocity is not always a good indicator of the quality of concrete. This paper concerns the application of ultrasonic wave attenuation as a tool for evaluating concrete. A spectral ratio technique is used to determine the quality factor, a non-dimensional parameter that...
Analyses of dielectric properties of fertilizers (urea and diammonium phosphate) in aqueous solution at different temperatures in microwave frequency
December 2010
This paper reports experimental results which have been carried out for understanding the behavior of dielectrics in the form of mixer of fertilizers and water content at wide frequency range in different temperatures. A simple and rapid measurement (reflection method) was used in determining the dielectric response at microwave frequency. The dielectric constant and loss have been measured in frequency range from...
A novel hybrid module of skin detector using grouping histogram technique for Bayesian method and segment adjacent-nested technique for neural network
December 2010
Skin detection is a common ancient image processing applications for detecting human images. The applications include video surveillance, naked image filters within unit-spam systems and face detection. Skin color is considered as a useful and discriminating spatial feature for many skin detection related applications, but it is not robust enough to deal with complex image environments. Skin tone ranges from dark (some...
A vırtual laboratory for fuzzy logıc controlled DC motors
December 2010
Direct current (DC) motors have currently a wide usage in industrial applications. This resulted in the necessity of making the speed controls of DC motors in a sensitive manner. Conventional controllers have poorer performances due to the non-linear features of DC motors like saturation and friction. Fuzzy logic controllers (FLC) are widely used in controlling poorly-defined, nonlinear and imprecise systems. FLC...
A comparative simulation of mobile WiMAX physical layer performance for Zero-Force (ZF) and Minimum Mean Square Error (MMSE) channel equalizers
December 2010
Mobile WiMAX is a broadband wireless solution that enables convergence of mobile and fixed broadband network through a common wide area broadband radio access technology and flexible network architecture. The aim of this paper is the performance evaluation of 802.16e system using different channel equalizers at the receiver module for different communication and modulation technique for different bandwidth. We analyze...
Adaptive randomized descent algorithm for solving course timetabling problems
December 2010
This work proposes an Adaptive Randomized Descent Algorithm (ARDA) for solving university course timetabling problems. The work aims is to produce an adaptive algorithm that can produce good quality timetable by assigning a set of courses (events) and students to a fixed number of timeslots and rooms subject to a set of constraints. ARDA delays the comparison between the quality of the candidate solution and the current...
Application of support vector regression to predict metallogenic favourability degree
December 2010
Mineral resource prediction is becoming increasingly important as researchers attempt to resolve the prospect direction by mining geological data. In this paper, Support Vector Regression (SVR) is applied to predict iron deposit metallogenic favourability degree since SVR is a powerful tool to solve the problem characterized by smaller sample, nonlinearity, and high dimension with a good generalization performance based...
Finitisticness via filters
December 2010
In this paper we generalized Finitisticness of topological spaces via filters, introduced the concept of F- finitistic space and studied its various basic properties. Key words: F- finitistic space, topological space, open refinement, filter.
Travelling wave solution for non-linear Klein- Gordon equation
December 2010
In this work, we construct explicit exact solutions for the non-linear Klein-Gordon equation by using a -expansion method. By means of the method, many new exact travelling wave solutions for the non-linear Klein- Gordon equation are successfully obtained. Key words: Non-linear Klein-Gordon equation,-expansion method.
A biological model to improve PE malware detection: Review
November 2010
Malwares control computer systems by infecting system files. They take advantage of system compatibilities to ensure their survival from one version to another. The structure of the windows portable executable (PE) files between available versions of the windows operating system (OS) makes these files an easy target for malwares. Fields and codes of clean PE files are modified and changed after infection. Checking both...
Modified particle swarm optimization for probabilistic slope stability analysis
November 2010
This paper develops an effective method for a probabilistic analysis of earthen slopes. Typically, the safety of a slope is assessed in terms of a factor of safety based on deterministic methods. However, these methods are unable to handle the uncertainties in the stability analysis. Therefore, the probabilistic approach is used for analyzing the safety of slopes, which is capable to take into account the uncertainties....
Reinforcement in concrete piles embedded in sand
November 2010
In this study, the necessity of reinforcement in concrete pile (bored or driven) is assessed. The soil was assumed to be unsaturated and homogeneous sandy soil. Throughout the study, a finite element computer program was used and the pile was modeled as a beam-on-elastic foundation. The soil is represented by discrete spring. The stiffness of each spring is considered to be linearly variable with depth. The moment...
Stimulatory effects of soybean isoflavones on exercise performance
November 2010
The object of this study was to investigate stimulatory effects of soybean isoflavones (SI) on exercise performance based on swimming time to fatigue in mice. The mice were randomly divided into four groups: a control group and three treatment groups. The control group was administered with distilled water and the treatment groups were administered with SI of 50, 200 and 500 mg/kg body weight by gavage every day for 5...
Simulation analysis for performance of artificial water fog screening based on infrared image recognition of amphibian armored vehicles
November 2010
On the basis of analyzing exposed signature of amphibian armored vehicles, anti-jamming principle of dual infrared guidance and influence of water fog to infrared detection distance, the artificial water fog screening technique is put forward; and the relationship between spray quantity, water fog radius and extinction characteristics have been analyzed with Mie scattering theory which is used to choose the prime water...
Mixed convection in an inclined lid-driven enclosure with a constant flux heater using differential quadrature (dq) method
November 2010
Mixed convection heat transfer and fluid flow in an inclined square lid-driven enclosure is studied using differential quadrature (DQ) technique. Two parallel walls of the enclosure are adiabatic while one fixed wall is heated with a constant heat flux heater and moving lid is isothermal. The calculations are performed in the range of the Richardson number from 0.1 to 100. The effects of inclination angle on heat...
Stress-strain model of PVC-FRP confined concrete column subjected to axial compression
November 2010
The design of PVC-FRP confined concrete members requires accurate evaluation of the performance enhancement due to the confinement provided by PVC-FRP tube. Based on the static equilibrium condition and the yield criteria of concrete and PVC-FRP tube, this paper presents a calculating model of the load-carrying capacity of PVC-FRP confined concrete column, the influences of the hoop spacing of FRP strips and equivalent...
The importance and development of national geodetic networks in map production: A Turkish case study
November 2010
Maps are a fundamental requirement for all kinds of infrastructure and engineering projects. Maps are produced by various institutions and organizations for different purposes. The important issue is that these maps from different sources are combined, archived, and stored in way that facilitates the economic use of a country’s resources and promotes effective data exchange. For the combining and storing of maps...
A study on measurement of building wall thickness from 3D object model
November 2010
Technological developments provide new methods for the measurement of 3D point data and information extraction from them. Terrestrial laser scanning is the latest method to 3D surveying and modeling. All geometric information belonging to the object or scene can be extracted from terrestrial laser scanner (TLS) data. The aim of this work is measurement of wall thickness of a building, which was built to protect the...
Comparison of experimental internal forces with full and partial interaction theories in steel-concrete-steel sandwich beams
November 2010
Steel-concrete-steel sandwich beam (double skin composite beam - DSC) experimental results including axial forces in steel plates and shear forces between the layers are compared with full and partial interaction theories. The flexibility of shear stud connectors on both tension and compression faces are taken into account in the partial interaction analysis including the influence of frictional forces between the...
Energy-efficient channel estimation for multiband UWB systems in presence of interferences
November 2010
Interference reduces the performance of a correct data signal detection and decoding. This problem becomes severe when interferences exist during the period of channel estimation. This will destroy the accuracy of channel estimation, and will eventually result to severe degradation in the performance of signal detection and decoding in the entire data packet/frame. In this article, we propose an improved channel...
Determining economic lot size and number of deliveries for EPQ model with quality assurance using algebraic approach
November 2010
The conventional method for determining production-shipment policy is by the use of differential calculus and Hessian matrix equations with the need of applying the first-order and second- order differentiations, on the long-run average production-inventory-delivery cost. A recent paper used conventional procedure to solve the production-shipment problem with quality assurance. This paper uses an alternative approach to...
Influencing factors governing paraffin wax deposition during crude production
November 2010
In this study, influencing factors controlling paraffin wax deposition from its reconstituted wax solution to the pipe wall surface will be presented. An experimental methodology constructed to simulate wax deposition process was employed to investigate these governing conditions. Series of test were designed to determine the effects of temperature differential, flow rate, residence time and wax concentration percentage...
On curvatures of a frenet curve in the pseudo - Galilean space
November 2010
In this paper, we study curvatures of a frenet curve in the pseudo-Galilean space and we obtain some characterizations. Key words: Pseudo-Galilean space, frenet curve, curvature.
Development of q-exponential models for tree height, volume and stem profile
November 2010
New models for tree height stem volume and taper (stem profile) were developed using a q-exponential function in the symbolic computational language MAPLE. Three previously constructed models and a new q-exponential model for height stem volume and taper wereemployed to compare predicted values with empirical values of height, stem volume and diameter outside bark. Performance...
Clinical and genetic aspects of Turkish hepatocellular carcinoma patients: Results of a single center study
November 2010
Hepatocellular carcinoma is one of the most progressive and aggressive cancer kinds worldwide. In various populations, the pathogenetic link between genetic polymorphisms of matrix-metalloproteinases, vascular endothelial growth factor and hepatocellular carcinoma is variable and limited. The aim of the present study was to retrospectively evaluate the clinical and genetic post-transplantation results of Turkish...
Use of zeolite in maize (Zea mays) cultivation on nitrogen, potassium and phosphorus uptake and use efficiency
November 2010
Concerns about unbalanced use of fertilizers leading to environmental pollution have been globally expressed. As a result, studies on how to use efficient methods to reduce nutrient applications at the same time increasing or maintaining crop yield, reducing nutrient losses and improving nutrient use efficiency are imperative. Nutrient loss due to leaching, volatilization and fixation upon fertilizer application to...
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