bluuebunny/crossref_metadata_2025 huggingface dataset:
Boundary Emenet Formulation in Elastoplastic Stress Anaysis
Authors: Gun Halit , Becker A.
Published: June 2016

This paper presents a review of different elasto-plastic Boundary Element (BE) formulations with particular emphasis on two main approaches; the initial strain displaccmcnt- gradient approach with its modeling of the partial or full interior domain, and the particular integral approach which can be applied exclusively to the surface avoiding any modeling interior. The initial strain formulation is implemcntcd in a computer program using two-dimensional isoparametric quatratic elements to discretise either the complete intcrior domain or only the part associated with the plastic region. The BE solutions are shown to bc in good agreement with analytical and Finite Elcment (FE) solutions.
Airflow over Wavy Yarn in Air-Jet Filling Insertion
Authors: Bakhtiyarov Sayavur , Adanur Sabit
Published: June 2016

Airflow over the wavy yarn during air-jet filling insertion is analyzed theoretically Two flow regimes are considered in the analyses: subsonic and supersonic flows over the yarn. Expression for drag coefficient as a function of air velocity is obtained for both cases Numerical simulations were made for certain practical situations and comparison is made between the drag force on the yarn in subsonic and supersonic flows.
Mathematical Model of Sulphomethylation Process of Nonylphenol
Authors: Bashirov Novruz
Published: June 2016

This paper concerns the development of the mat mathematical model of sulphomethylation process of nonylphenol based on planning of the experiment While developing the mathematical model of the process. a method of gross factor experiment (GFE). realizing all possible combinations of the factors chosen. was used by us. By varying four factors on two (minimum and maximum) levels. the experimental values of yields of the product required (sodium sulphate of hydroxynonylbenzyl sulphonic acid). were obtained The coefficients of regression equations Bi are calculated by scalar products Then the adequacy of the mathematical model was checked Thus. a mathematical model of the sulphomethylation process l)f nonylphenol in the full scale of coordinates was obtained.
Procudere for Definition of Neighborhood in Faulty Hypercube Multiprocessor
Authors: Allahverdi Novruz
Published: June 2016

A procedure for definition of neighborhood and fault free subcubes in a faulty hypercube is developed in this study. The cube algebra operations are used for proposed procedure. With this, we can increase the number of faulty elements In the hypercube. Which is obstacle for effective data processing and communication processes in such a system.
Line Shape and Profile of the LO Phonon Modes in Mixed Alloy System In1-x-yGaxAlyAs Epitaxial Layers Grown on InP
Authors: Bülbül M.
Published: June 2016

In this work. linewidth variations versus compositions of the first-order longitudinal optic (LO) phonon modes in the mixed alloy system are studied. The asymmetry and broadening of the LO modes is explained using a “spatial correlation” model with a Gaussian correlation function. The system investigated here were In1-x-yGaxAlyAs quaternary alloys lattice-matched to InP(with x+y ≈47%). The quaternary alloy samples were grown as epilayers on (001) InP substrates by molecular beam epitaxy(MBE).
On the Principal Component Based Fingerprint Classification Using Directional Images
Authors: Ballan Meltem , Gurgen Fikret
Published: June 2016

This study presents a method for fingerprint recognition based on principal component analysis (PCA) and point patterns (minutae) obtained from the directional histograms of a fingerprint. We first employ Principal Component Analysis (PCA) method to compress fingerprint data. The compressed data are then used for directional image representation. After the compressed data are obtained, the process continues with directional image formation, directional image block representation, and fingerprint matching, respectively. Our method determines the direction of each pixel, process the images in blocks and uses directional histograms thus removes the need for thinning. The method gives the same performance as that of the uncompressed data, but reduces computation. Furthermore, the parts of the system that successfully use artificial neural networks (ANN) are mentioned.
Fragmentation of a Non-Rotating Ni19 Cluster: A Molecular Dynamics Study
Authors: Avcı Halil , Çivi Mehmet , Güvenç Ziya , Jellinek Julius
Published: June 2016

Collisionless fragmentation of a non-rotating Ni19 cluster is studied using constant-energy molecular dynamics computer simulations. The cluster is modelled by an embedded atom model (EAM) energy surface. Distribution of the channel-specific fragmentation probabilities, and global rate constants are computed and analyzed as functions of the internal energy of the cluster. The results are compared with those obtained using the RRK statistical approach, and also compared with the other multi-channel fragmentation work.
Peristaltic Flow of a Third-Grade Fluid in a Planar Channel
Authors: Akyıldız F. , Demir H. , Ertürk V.
Published: June 2016

The problem of peristaltic transport of a non-Newtonian fluid represented by the constituve equation for a third grad fluid was analysed for the case of planar channel with harmonically undulating extensible wall, under zero Reynolds number and long wavelength approximation. New exact analytical solution of the non-linear equation resulting from the momentum equation was given when γ2 + γ3(which are the dimensionless material constants)>0 and under some conditions when γ2 + γ3<0. Also, the exact range of validity of the perturbation analysis was obtained using the Girolamo Cardano formulas and binomial theorem for both γ2 +γ3>0 and γ2+ γ3<0. Finally, we have shown that pumping rate of a third-grade fluid can be greater or less than for a Newtonian fluid having a shear viscosity same as the lower-limiting viscosity of non-Newtonian material depending on the value of the material constants, amplitude ratio and flow rate.n/a
Error Analysis of Determining Airplane Location by Global Positioning System
Authors: Hajiyev Chingiz , Burat Alper
Published: June 2016

This paper studies the error analysis of determining airplane location by global positioning system (GPS) using statistical testing method. The Newton Rhapson method positions the airplane at the intersection point of four spheres. Absolute errors, relative errors and standard deviation have been calculated The results show that the positioning error of the airplane varies with the coordinates of GPS satellite and the airplane.
Multi-Objective Optimization for Design and Stability of a General Control System
Authors: Makaracı Murat
Published: June 2016

With the advancement of new materials and techniques, smooth and high performance operation of critical systems such as fight simulators, satellite navigators and robots arms are desired in these systems, often more than one objective has to be accomplished. In the present study, the global criterion method is used as the multi-objective optimization tool. A general mass-spring-dashpot system is analyzed. Damping ratio and natural frequency are chosen as design variables. System settling time, percent overshoot and time to reach to maximum peak are objective functions to be minimized. Numerical solutions with the given constraints are presented and design specifications for the control system are suggested. It is also shown that this optimization tool is a good candidate for multi-criterion problems.
On the Drag Force of a Solid Sphere in Power Law Flow Model
Authors: Ahbasov T. , Herdem S. , Memnedov A.
Published: June 2016

A theoretical approach for estimation of the drag correlation coefficients in the flow of Newtonian or weak non-Newtonian liquids around spherical solid particles is presented. Some new analytical relations are derived by using a modified stream function. It is shown that these relationships can be applicable in a wide range of Reynolds number, up to Re < 1000 for the liquids with a flow behaviour index, n, in the range of 0.5<n<1. The predicted coefficients from these relationships are in very good agreement with the experimental data given in the literature.
On some Extensions of Dynamical Homeomorphism and Dynamical Isomorphism in Dynamical System
Authors: Bildik Necdet , İnç Mustafa
Published: June 2016

In this paper, the definitions and the theorems concerning with the invariant sets, w- and α- limit sets are given and proved in the new Dynamical Systems. By using of the definition of P and P¯ stability, some remarkable unknown results are obtained. Finally, the definition of Dynamical Isomorphism and Dynamical Homeomorphism are given and related original theorems are presented and proved.
Assessment and Comparison of Discrete Optimal Multirate and Conventional Analogue Controller Design Applied to a Hydrogenerator System
Authors: Boglou Anastasios , Papadopoulos Demetrios
Published: June 2016

In the present work an algebraic and an optimal control method (in connection with linear continuous systems as well as a new optimal multirate control method (in connection with linear discrete systems) are presented and applied, in order to design a suitable excitation controller (analogue and digital type respectively) and thus obtain a pertinent closed-loop system with enhanced dynamic stability characteristics. The obtained computer simulation results, based on a practical power system of the Greek national grid, show clearly the validity-suitability-effectiveness and implementabilitv of the excitation controllers designed using these control procedures.
Invariant Solutions for Soil Water Equations
Authors: Baikov V. , Khalique C.
Published: June 2016

We obtain exact solutions for a class of nonlinear partial differential equations which models soil water infiltration and redistribution in a bedded soil profile irrigated by a drip irrigation system. The solutions obtained are invariant under two parameter symmetry groups.
Spaces of Double Sequences of Fuzzy Numbers
Authors: SAVAS Elcrem
Published: June 2016

In this paper, we introduce some new double sequence spaces of fuzzy numbers, and show that they are complete metric spaces.
Electron Subsystem Microscobic Modeling of Multiatomic Crystals: The Software Pacage “scppband”
Authors: Kasumov Baba
Published: June 2016

The software package "SCPPBAND" (Self-Consistent Pseudo-Potential BANDs) is developed with the purpose of consecutive realization of micfoscopic solid state theory concepts for the electron subsystem description of multiatomic crystals within the "ab initio" uniform approach and is applied for the fundamental characteristics desciption of the crystals of various classes: BaTiO3 - perovskite - a representative of the wide-gap dielectrics, PbMoO4 - crystal with a sheelite structure not being the object of consecutive microscopic calculation previously and GeTe - narrow-gap semiconductor-ferroelectric - a representative of A4B5 - group. The obtained results are in good agreement with availlable literary and experimental data.
Modeling of Performance and Retarder Chart of Off-Highway Truck by Newton Divided Diffrence Method
Authors: Erarslan Kaan , Beyhan Sunay
Published: June 2016

Off-highway truck performance and retarder charts are used to calculate number of trucks for different road conditions. Determination of speed of a truck enables calculation of time that will be spent for that road profile. Total cycle time is a parameter, which is crucial from economical point of view for the calculation of number of truck. In this study, Newton Divided Difference method is examined for modeling of performance and retarder chart of mechanical wheel drive truck. The aim is to provide a practical chart modeling manner and base for further truck motion simulation. The approach is coded in C++ and applied to a real overburden stripping mine panel. The reasonable results reveal that the system is convenient for chart modeling and cycle time calculation.
Elastic-Plastic Stress Analysis in Thermoplastic Composite Cantilever Loaded by a Single Force
Authors: ÖZCAN R.
Published: June 2016

In this investigation an elastic-plastic stress analysis is carried out in a steel fiber reinforced thermoplastic composite cantilever. The beam is loaded by a single force at its free end. An analytical elastic-plastic solution is found by satisfying both equations of equilibrium and boundary conditions. Orientation angles are chosen as 0°, 30°, 45°, 60° and 90°. Yielding starts at upper or lower surfaces of the beam at different distances from the free end for 30°, 45°, 60° orientation angles. Maximum residual stresses are obtained at the upper and lower surfaces of the beam. For the shear stress, maximum stress component is found around the x-axis.
General Mixed Multivalued Mildly Nonlinear Variational Inequalities in H-Spaces
Authors: Ahmad Rais , Salahuddin Hanif
Published: June 2016

A general mixed multivalued mildly nonlinear variational inequality is considered. We establish an existence for (GMMMNVI) by replacing convexity assumptions with merely topological properties.
Uncertainly Analysis of Cryogenic Turbine Efficiency
Authors: Kanoglu Mehmet
Published: June 2016

A procedure for estimating uncertainty in the hydraulic efficiency of cryogenic turbines is presented. A case study is performed based on the test data from a cryogenic turbine testing facility. The effects of uncertainties in the measurements of temperature, pressure, and generator power on the turbine hydraulic efficiency are studied and the uncertainty in turbine efficiency is estimated to be ±0.20%. About 79% of the uncertainty is determined to come from the uncertainty in generator power measurement. This uncertainty in turbine efficiency is believed to be reasonable and acceptable for the testing of cryogenic turbines.
The Cosine Hyperbolic and Sine Hyperbolic Rules for Dual Hyperbolic Spherical Trigonometry
Authors: UĞURLU H. , GÜNDOĞAN H.
Published: June 2016

The dual hyperbolic unit sphere \(H_{0}^{2}\) is the set of all dual time-like units vectors in the dual Lorentzian space \(D_{1}^{3}\) with signature (+,+,-). In this paper, we give the cosine hyperbolic and sine hyperbolic-rules for a dual dual hyperbolic spherical triangle \(\tilde{A}\tilde{B}\tilde{C}\) which its sides are great-circle-arcs.
Scattering of SH Waves by Fixed-Rigid Nearly Circular Cylinder
Authors: Hayir Abdul , Bakirtas Ibrahim
Published: June 2016

A solution for the two-dimensional scattering and diffraction of plane SH waves by fixed-rigid cylinder of arbitrary shape in an elastic infinite medium is presented. The wave field for arbitary geometry in this paper is computed numericaly by the method weighted residues (moment method). Dynamic stress concentration factors around the arbitrary obstacles are obtained with respect to various dimensionless wave numbers. When the cavity is circular, results obtained from the analytical solutions are the same.
An Elasto-Plastic Stress Analysis in a Polymer Matrix Composite Beam of Arbitrary Orientation Subjected to Transverse Uniformly Distributed Load
Authors: Esendemir Ümran
Published: June 2016

Polymer matrix composite beam of arbitrary orientation subjected to transverse uniformly distributed load is studied by an analytical elasto-plastic stress analysis. In the elasto-plastic solution, the material is assumed to be perfectly plastic. A composite consisting of fiber reinforced polymer matrix was produced for this work. The expansion of the plastic region and the residual stress component of are determined for 0°, 30°, 45°, 60° and 90° orientation angles. The yielding begins for 0° and 90° orientation angles at the upper and lower surfaces of the beam at the same distances from the free end. But, it starts first at the upper surface for 30°, 45° and 60° orientation angles. Sample problems are given for various orientation angles, x axis of the beam is used to obtain the location of the elasto-plastic boundary and to calculate elastic, elasto-plastic and residual normal and shear stresses. The intensity of the residual stress component of τxy is maximum on or around the x axis of the beam but the residual stress component of σx is maximum at the upper and lower surfaces.
Motion of Compressible Liquids in Pipes
Authors: Hassanov Hikmet
Published: June 2016

The hydrodynamic problem of defining the velocity profile of liquid is resolved, assuming for the liquid density to be compressed in accordance with exponential law along coordinate z. The continuity equation for this liquid is concluded. Influence of barometric index λ on motion character is estimated. Flowrate decrease and coefficient of hydraulic losses for the compressed liquid are found. Principle of quasi - isothermal approximation is established, and the effect of temperature gradient on final result is qualitatively considered.
The Importance of Mesh Modeling in the Calculation of Stress Intensity Factor
Authors: Aktaş A. , Aktaş M.
Published: June 2016

In this paper, stress intensity factor (SIF) of an infinite plate with a center notched hole is calculated by means of finite element method (FEM) using both triangular quadratic element (TQE) and triangular quarter point element (TQPE) (Fig. 2). The FE analyses are performed using Ansys5.4 program code. SIF also is calculated from linear elastic fracture mechanics. The obtained results are compared to each other and it is found that the results from the TQPE are closer to exact solution.
The Effect of the Galileo Invariance Pairing on the 1- States in Spherical Nuclei
Authors: Kuliev A. , Selam C. , Küçükbursa A.
Published: June 2016

Experimentally investigation low lying 1- excitations in heavy nuclei plays important role in modern nuclear structure physics. In particular the measurements of the El strength in the region Ex ≤ 3 MeV may shed some light on the mechanism by means of which isospin symmetry or Galilean invariance of pairing is broken in nuclei. In our search we investigate the characteristics of 1- states for Te, Ba, Ce isotopes in translational invariance GDR model including Galilean invariance pairing. Our calculations show that integrated cross sections is sensitive to restoration broken Galilean invariance of pairing. This restoration does not influence the positions of the low lying 1- states, but changes its El strengths. In spite of restoration Galilean invariance of pairing it is impossible to carry out to the experimental results with spherical structure of nuclei which have been examined.
An Elasto-Plastic Stress Analysis on a Metal Matrix Composite Beam of Arbitrary Orientation Supported from Two Ends under a Transverse Uniformly Distributed Load
Authors: Küçük Mümin , Esendemir Ümran
Published: June 2016

An analytical elastic-plastic stress analysis is carried out on a metal-matrix composite beam of arbitrary orientation supported from two ends under a transverse uniformly distributed load. The composite layer consists of stainless steel fiber and aluminum matrix. The material is assumed to be perfectly plastic in the elasto-plastic solution. The intensity of the uniform force is chosen at a small value; therefore the normal stress component of σy is neglected during the elasto-plastic solution. The expansion of the plastic region and the residual stress component of σx are determined for 0°, 30°, 45°, 60° and 90° orientation angles. Plastic yielding occurs for 0° and 90° orientation angles on the lower and upper surfaces of the beam at the same distances from the mid point. However; it starts first at the lower surface for 30°, 45° and 60° orientation angles. The intensity of the residual stress component of σx is found maximum at the lower and upper surfaces. However; the intensity of residual stress component τxy is maximum on or around the x axis of the beam.
A Topological Application of the Monodromy Groupoid on Principal Bundles
Authors: Mucuk Osman
Published: June 2016

The idea of monodromy groupoid we deal here is due to Pradines [1]. An application of the monodromy groupoid on principal bundles was earlier given in [2]. In this paper, a topological version of this application is given.
On Generalized Mixed Quasivariational Inclusions
Authors: Husain Shamshad
Published: June 2016

In this paper, we study a class of generalized mixed quasivariational in-clusions. By using the properties of the resolvent operator associated with maximal monotone mapping in real Hilbert space, we have established an existence theorem of solutions for generalized mixed quasivariational inclusions, suggesting a new iter-ative algorithm and a perturbed proximal point algorithm for finding approximate solutions which strongly converge to the exact solutions of the generalized mixed quasivariational inclusions. The results proved in this paper are more general than the previously known results in this area.
Group Classification and Some Similarity Solutions for a Nonlinear Filtration Equation
Authors: Pakdemirli Mehmet
Published: June 2016

A nonlinear filtration equation in which the filter coefficient is an arbitrary function of the specific deposit is considered. Lie Group theory is applied to the coupled system of partial differential equations. Group classification is performed with respect to the arbitrary filter coefficient. Some similarity solutions are constructed using the symmetries.
Elastic-Plastic Stress Analysis and Residual Stresses in Metal Matrix Laminated Plates under In-Plane Loading
Authors: Özbay Mahmut
Published: June 2016

Metal matrix composites reinforoed by give high strengths, specific stiffness, ductility, yield point and a good temperature performance. They provide a relatively new way of strengthening metals. In this study, continuous steel fiber reinforced aluminum matrix composite manufactured die casting process has been used as a simply supported Symmetric and antisymmetric laminated plate loaded by in- plane forces. An elastic- plastic numerical solution has been carried out by finite element technique for several load numbers. Residual stresses have been given in tables.
Data Envelopment Analysis: An Application to Turkish Banking Industry
Authors: Bal Hasan , Gölcükcü Ayhan
Published: June 2016

DEA is a well-known decision making tool and efficiency measurement technique which was proposed by Charnes et al. in : 1978 in EJOR. Since then, the technique had proved itself in many application in many areas like banking, agriculture, transportation and so on and many papers had written in many journals by authors around the worldwide. DEA is a non-parametric technique and scope of DEA is to determine the efficiency of decision-making units (DMUs). It divides the DMUs into two group named as efficient and inefficient, then derives a piecewise linear frontier with pareto-efficient DMUs and gives an efficiency score of 1(one) to each of them. However, the DMUs below the frontier gets an efficiency score less than 1 (one). Their efficiency score is determined by the distance between the frontier and the coordinates of each of the inefficient DMUs. Furthermore, DEA also determines the source and the amount of inefficiency so that DEA becomes indispensable for decision-makers, named as boss, manager director, owner or others. In this paper, despite of the classical usage, a new area for DEA would be introduced and a new definition would be made for decision-maker. In our work decision-maker is customer.
Numerical Solution of Improper Integrals with Valid Implementation
Authors: Abbasbandy Saeid , Fariborzi Araghi Mohammad Ali
Published: June 2016

In this paper, two theorems are explained which are used in order to find the improper integral I = \({\int_a^\infty}\)f(x)dx numerically. It has been proved in [4], one can use the Trapezoidal and Simpson rules to find the definite integral Im = \({\int_a^\infty}\)f(x)dx numerically using the CESTAC (Control et Estimation Stochastique des Arrondis de Calculs ) method which is based on the stochastic arithmetic, [5-8,12]. These theorems are developed on the improper integrals. Then, the CESTAC method and stochastic arithmetic are used to validate the results and implement the numerical examples. By using this method, one can find the optimal integer number m ≥ 1 such that I ~ Im. In the last section two examples are solved. The programs have been provided with Fortran 90.
On the Phase Dependence of the Cramér-Rao Bounds for Damped Sinusoids
Authors: Dilaveroğlu Erdoğan
Published: June 2016

The problem of estimating the parameters of superimposed damped sinusoids in noise is considered for both complex and real data cases. It is shown that for the complex case, the Cramér-Rao bounds on the variance of unbiased estimators of the signal parameters are independent of the phases of all the sinusoids, and that for the real case, the bounds for the parameters of a particular sinusoid are dependent on the phase of that sinusoid, but are independent of the phases of all the other sinusoids.
Multiindex Multivariable Hermite Polynomials
Authors: Shrivastava HSP
Published: June 2016

In the present paper multiindex multivariable Hermite polynomials in terms of series and generating function are defined. Their basic properties, differential and pure recurrence relations, differential equations, generating function relations and expansions have been established. Few deductions are also obtained.
Fredholm-Volterra Integral Equation in the Contact Problem
Authors: El-Bary A.
Published: June 2016

In this paper, under certain condition the Fredholm-Volterra integral equation of the first kind is solved. The existence. and uniqueness of the solution is considered. The Fredholm integral equation of the second kind is established from the work, and its solution is also obtained.
On the Norms of GCD Matrices
Authors: Bozkurt Durmuş , Solak Süleyman
Published: June 2016

In this study, we have established the bounds for the \(\ell_p \) norms and the Euclidean norm of almost GCD Cauchy-Toeplitz, almost GCD Cauchy-Hankel and GCD matrices, respectively.
A Template Based Graph Reduction System Based on Combinators
Authors: Çavuşoğlu Abdullah , Göktaş H. , Vardal Necla
Published: June 2016

Graph reduction is one of the important evaluation strategy for lazy functional Programming. A combinator is a function that contains no free variables. The idea is based on the fact that, all of the variables in a program can be removed by transforming it into a sequence of combinators which would be drawn from a small pre-defined (fixed) set of combinators (SKI), or which would be drawn from an unlimited number of non-pre- defined set of dynamic super-combinators (SC). We are suggesting a template based algorithm which reduces the stored graph structure of the super-combinators. We can define any produced super-combinators by using templates and use them to perform reduction on the graph. The template based algorithrn could be extended and any produced super-combinators can be defined with a predefined template list. The test results show that our approach increases the efficiency of super-combinators algorithms.
Response of a Parametrically Excited System with Quadratic and Cubic Non-Linearities
Authors: Eissa M. , EI-Serafi S. , Kamel M. , Rageb M. , Amer Y.
Published: June 2016

An investigation is presented of the response of a three-degree-of-freedom system with quadratic and cubic non-linearities under parametric excitations. The problem of suppressing the vibration of a structure that is subjected to combination parametric excitation is considered, where the vibration amplitudes resulting from such resonance can not be controlled. The fixed points of the three equations are obtained and their stability are determined. Numerical solutions are conducted to obtain the response of the three modes and their stability. Effects of the different parameters on both response and stability of the system are also investigated.
Cylindrical Magneto-Hydrodynamic Model of Shock Waves with Radiation Heat Flux in Non-Uniform Rotating Atmosphere
Authors: Ganguly Ashok , Shinde Shilpa
Published: June 2016

A self similar, theoretical model of cylindrical magneto-hydrodynamics shock wave with radiation heat flux in non-uniform rotating atmosphere, in the rotating medium, in the presence of magnetic field, radiation and gravitation, has been developed. Subsequently, its comparison with the hydro dynamic case has been shown with the help of variations of flow variables with distance graphically. In case of density and radiation flux and mass a significant variation has been observed.
Design-Optimization of Mechanical Components Using the “Multiple Objective Tabu Search” Method
Authors: Baykasoğlu Adil
Published: June 2016

The multiple objective version of the tabu search (TS algorithm was initially developed by Baykasoglu et al [1-3]. The idea of applying tabu search to multiple objective optimization, inspired from its solution structure, in which tabu search works with more than one solution (neighborhood solutions) at a time. This situation creates the opportunity to evaluate multiple objectives simultaneously in one run. To enable the original tabu search algorithm to work with more than one objective the selection and updating stages were redefined. Other stages are identical to the original tabu search algorithm. In this paper, mutiple objective tabu search algorithm is used to solve mechanical component design problems) with multiple objectives. Although there exists a number of classical techniques, meta-heuristic algorithms including TS have an edge over the classical methods in that they can find multiple Pareto-optimal solutions in one single run. In the paper four mechanical component design problems borrowed from the literature are solved. The results are compared with several other solution techniques including multiple objective genetic algorithms. It is observed that in many of the cases the multiple objective tabu search algorithm can find better and much wider spread of solutions than the compared algorithms.
Invariant Solutions and Conservation Laws of the Black-Scholes Equation
Authors: Pooe C. , Mahomed F. , Soh C.
Published: June 2016

As the Black-Scholes equation can be transformed into the one-dimensional linear heat equation via two sets of transformations, an optimal system of one-dimensional subalgebras for the one-dimensional heat equation is exploited to obtain two classes of optimal systems of one-dimensional subalgebras for the well-known Black-Scholes equation of the mathematics of finance. Two methods for the derivation of the two classes of optimal systems of group-invariant solutions for this model are available. We present the simpler approach
An Algorithm for Segment Stability
Authors: Dzhafarov V. , Büyükköroğlu T.
Published: June 2016

In this note an algorithm for testing on stability-unstability of polynomial segments with stable end-points is given. The algorithm is based on well-known segment lemma and on approximate positive real roots of suitable polynomial equation. In this paper an upper bound for absolute error of approximate root that guarantees the segment stability or unstability is established. In the case of unstability the algorithm, differs from the existing algorithms, explains the segment behavior in the parameter space. Some illustrative examples also are given.
On the Construction of Differential Inclusion with Prescribed Integral Funnel
Authors: Guseinov Kh. , Özer O. , Düzce S.
Published: June 2016

In this article, the inverse problem of the differential inclusion theory is considered. For a given ε > 0 and a given special type set valued map t → V(t), t ∈ [t*, t*], it is required to define differential inclusion such that the Hausdorff distance between the reachable sets of the differential inclusion with initial set (t* , V(t*)) and V(t) would be less than ε for every t ∈ [t*, t*].
On Some Sequence Spaces and Lacunary σ-Statistical Convergence
Authors: Savaş Ekrem , Savaş Rahmet
Published: June 2016

In this note, we define and study two concepts which arise from the notion of lacunary strong convergence, and invariant means, namely lacunary strong σ- convergence with respect to an Orlizi function and lacunary a-statistical convergence and established the relationship between these two concepts.
The Simple Recurrent Formulas to Find a Sequences of Numbers Satisfying Equation x2+(x+1)2=z2 and the Properties of These Integers
Authors: Abiyev Asker , Abiyev Azer
Published: June 2016

In this study, simple recurrent formulas have been found to form the sequence of Phythogorean triple. These three integers, any two of which are relatively prime numbers, are set up basic Phythogorean triple. The properties of these triples have been examined and classified.
A Neural Network Image Recognition for Control of Manufacturing Plant
Authors: Karlik Bekir
Published: June 2016

The aim of this work is to interpret the image for vision-based logic control of manufacturing plant. The images. which had been taken by an overhead fixed camera, were transformed with feature value by image preprocessing. A multi-layered neural network was used to recognize randomly selected images of metallic pegs and plastic rings. Images, which are not recognized by the neural network, will be rejected and consequently the actuator will allow the objects to pass through. On the other hand, if the images are recognized by the neural network then the logic controller generates different type of action and the actuator pushes the object down.
Application of Neural Networks to Estimate Common Mode (CM) Model Impedance Parameters in AC Drives
Authors: Gulez Kayhan , Mutoh Nobuyoshi
Published: June 2016

Predicting and solving EMI emissions related to Common Mode (CM) ones in inverter (including pulse with modulation (PWM) inverter)-induction motor drive systems requires various frequency-dependent effects to be considered. Thus, the application of filter circuitry to improve the performance per size and prevent dependency on some parameters of the motor for Electro-Magnetic Interference (EMl) filter is considered. The major problems are power line frequency rejection and the compensation of the feedback loop, which is influenced by the wide-ranging utility impedance. Thus, the proposed method allows another way to determine Common Mode (CM) impedance components as a beginning way and sample on the application stage of EMI filter to prevent the EMI noise applying to the conducted electromagnetic emissions generally caused by power supply firstly, then secondly to Common Mode (CM) path of the motor drive system.
Rule-Based Fuzzy Classification Using Query Processing
Authors: Eminov Mübariz
Published: June 2016

This paper describes the derivation of fuzzy classification rules based on c-means fuzzy clustering algorithm as results that are induced of fuzzy clusters. Each fuzzy cluster is associated with a fuzzy classification rule in which fuzzy sets are obtained by projecting the cluster to one-dimensional domains. In order to provide a unique assignment of data to a defined class it is suggested to use the fuzzy query processing executed on the base of induced linguistic fuzzy classification rules. This approach has been applied to fuzzy classification of population where fast and efficient assignment as well as the rank of a data in the same class is supplied.
The Monitoring Simulation of a Lathe
Authors: Balan George , Tarau Calin
Published: June 2016

The study of machine-tool dynamic is realised here as “monitoring”, meaning checking and improving the functioning of the machine. The state of processing is followed with certain sensors which signs are processed inside the computer, then it takes the decision of monitoring, meaning the identification of a class from the set of classes (process conditions). For monitoring in turning, it is shown the classes (tool conditions). The vibrograms that represent: - the components variations of the cutting force; - the relative displacement between tool and piece, on the repelling direction; - the power furnished by the electric engine, are realised with the functions RANDN and RAND (from MATLAB). Based on them it is calculating 11 monitoring indices. The class resulted at the experiment (simulate) i, which corresponds to the monitoring indices, we establish with the function REM. The ANN with 11 inputs (the number of monitoring indices) and 8 outputs (the number of classes) is realised with 3 layers. The network is made with the function newff, trained with the function train and simulated with the function sim.
Determination of Complex Dielectric Permittivity of Loss Materials at Microwave Frequencies
Authors: Hasar U. , Akay M. , Kharkovsky S.
Published: June 2016

The method of determination of complex dielectric permIttIvIty of loss materials at microwave frequencies (X-band) using measured amplitudes of reflection and transmission coefficients and numerical calculations is developed. Different numerical methods namely graphical, bisection (halving), newton, and secant, are applied in order to determine the permittivity of cement-based materials. Simulation time and errors of these methods are compared. It is shown that the fastest and most accurate method is the bisection (halving) method because it is a global method.
The Resonance Analysis Caused by Harmonics in Power Systems Including Thyristor Controlled Reactor
Authors: Yüksel Ramazan , Uzunoğlu Mehmet , Kocatepe Celal , Argin Mehmet
Published: June 2016

The static VAR compensators having fixed capacitor thyristor controlled reactor (FC-TCR) used to improve voltage stability in power systems are nonlinear elements. The fixed capacitor group will produce reactive power while the thyristor controlled reactor will consume reactive power in compensators having FC-TCR. Changing the firing angles of TCR provides the reactive power variation of the system since the reactive power production of capacitors is fixed at a determined voltage level. In some cases, the variation of these firing angles will cause the harmonics in the system. In this study, TCR's are discussed to be harmonic sources and the resonance case caused by harmonics has been investigated with Fourier Matrix Model and MATLAB Software.
A Comparison on the Commutative Neutrix Products of Distributions
Authors: Kilicman Adem
Published: June 2016

In this work, we define a new commutative neutrix product of distribution and than we make a comparison with present commutative product of distributions by providing a counterexample that two commutative neutrix products of the distributions differ.
A Dynamic Load Balancing Model for a Distributed System
Authors: Akay Oğuz , Erciyeş Kayhan
Published: June 2016

A communication protocol designed for fault tolerance in distributed real time systems is implemented and a dynamic load balancing model is designed and implemented over this protocol. The protocol consists of cluster based, hierarchical rings which use synchronous communication. The rings are synchronous. At the lowest level in the hierarchy, there are clusters that consist of computing processors, called nodes. The higher level consists of the cluster representatives that manage the clusters of the lower level. There can be two or more levels in the hierarchy. Ring protocols in each cluster can work in parallel. Also, a fault tolerance mechanism is integrated to the protocol. The dynamic distributed load balancing module designed over the protocol aims to maximize the overall performance of the whole system by distributing the load submitted to the system efficiently and transparently among the nodes. While performing operations to achieve this goal, the module also considers the real-time constraints of the system
Sliding Mode Speed Control for DC Drive Systems
Authors: Guldemir H.
Published: June 2016

In this study, the Sliding Mode Control theory of the Variable Structure System has been applied to the speed control of a de motor. The dynamic performance of the sliding mode speed control system has been studied against system parameter variations and external load disturbance and the simulation results are given. The application of the sliding mode control theory to controller design for DC drive control system shows a robust system performance.
Active Suspension Control of Eight Degrees of Freedom Vehicle Model
Authors: Guclu Rahmi
Published: June 2016

In this study, the dynamic behavior of eight degrees of freedom vehicle model having active suspensions and a PID controlled passenger seat is examined. The suspensions considered are Mc Pherson strut type of independent suspensions. Three cases of control strategies are taken into account. First, only the passenger seat is controlled. Second, only the vehicle body is controlled. Third, both the vehicle body and the passenger seat are controlled at the same time. PID controller is applied as a conventional method. Since this control method can be applied easily and is widely well known, it has an important place in control applications. The time and frequency responses of the vehicle model due to road disturbance are obtained for each control strategy. At the end of the study, performances of these strategies have been compared and discussed.
Flow of a Third Grade Fluid between Concentric Circular Cylinders
Authors: Yürüsoy M.
Published: June 2016

The steady-state flow of a third grade fluid between concentric circular cylinders with heat transfer is examined. The temperature of pipes is assumed to be higher than the temperature of the fluid. Reynold's model viscosity case is treated. Approximate analytical solutions are presented using perturbation technique.
Transport Coefficients of Nuclear Matter at High Temperatures
Authors: Manisa K. , Oğul R
Published: June 2016

High temperature coefficients of viscosity and heat conductivity of nuclear matter are calculated on the basis of Chapman-Enskong approximation in the dilute gas limit. It is observed that increasing temperatures produce significant changes in coefficients.
Parametrization of Torsion Units in U1(ZS3)
Authors: Bilgin Tevfik
Published: June 2016

In this study, a representation of the group ring ZS3 is obtained by using a faithful irreducible representation of S3 of degree 2. In ZS3, all torsion units are expressed in terms of parameters by means of this representation. It is shown that any torsion unit in U1 (ZS3) can be expressed in terms of two parameters.
The Investigation of the log(ft) Values for the Allowed Gamow-Teller Transitions of Some Deformed Nuclei
Authors: Selam C. , Babacan T. , Aygör H. A. , Bircan H. , Küçübursa A. , Maraş I.
Published: June 2016

The log(ft) values of allowed β± decay between odd-A nuclei for 125 < A < 180 mass region are investigated. Single particle energies and wave functions are calculated by making use of a deformed Woods-Saxon potential. The calculations are performed in the framework of proton-neutron quasi particle random phase approximation (QRPA) including the schematic residual spin-isospin interaction among the nucleons in the particle hole channel. The calculations indicated that the results obtained through using the χGT=5.2/A0.7 are more in agreement with experimental observations.
The GCD-Reciprocal LCM Matrices on GCD-Closed Sets
Authors: NaIII Ayşe , Taşci Dursun
Published: June 2016

We have given a structure theorem for the GCD-Reciprocal LCM matrix and then we have calculated the value of the determinant of the GCD-Reciprocal LCM matrix. We have obtained formula for the determinant and the inverse of the GCD-Reciprocal LCM matrix defined on gcd-closed sets.
Projection Methods for Quasi-Variational Inequalities
Authors: Salahuddin Hanif
Published: June 2016

In this paper, we consider a new class of variational inequalities which is called the general mixed multivalued nonlinear quasi-variational inequality. We define an iterative algorithm and prove the existence solution for our general mixed multivalued nonlinear quasi-variational inequality by using the updating projection method and convergence criteria for iterative sequences generated by algorithm are also discussed.
Effect of Forward Speed on Ship Rolling and Stability
Authors: Taylan Metin
Published: June 2016

Ship stability is evaluated at zero speed most of the time. Majority of the stability criteria is also based on the behavior of ships at standstill. However unlike fixed offshore platfoims, ships are on the move due to their nature of operation. Therefore a ship's hydrostatic and hydrodynamic characteristics undergo changes because of the varying underwater volume, centers of buoyancy and gravity and pressure distribution. This work deals with the effects of forward speed on ship stability and motions, particularly on rolling motion in synchronous beam waves. An equation of nonlinear roll motion is chosen to calculate roll responses of a test vessel in beam seas. The speed of advance is incremented and roll responses are determined at each speed interval. Various characteristics of GZ curve for the selected test vessel are altered systematically to observe their effects on roll responses along with the forward speed. Several computer programs are also employed to handle colossal mathematical manipulations.
A Designed ADI Software for Solving Poisson’s Equation
Authors: Ismail I. , Allan M.
Published: June 2016

In This paper, a software has been designed to perform the alternating direction implicit, ADI, method for the case of two dimensional flow represented by Poisson's equation. A square mesh with varying mesh size has been adopted. The results came out very much complying with the analytical solutions asserting the rigour of the software.
Crossed Modules of Algebras
Authors: Arvasi Zekeriya
Published: June 2016

In this paper we will give some algebraic results of crossed modules of algebras.
Green’s Function for Parallel Planes and an Open Rectangular Channel-Flow
Authors: Ismail I. , Elbehady E.
Published: June 2016

Here we use a more convenient technique to generate a faster convergent Green's function needed for solving Laplace's equation in two cases: the first domain is bounded by two parallel planes; and the second is an infinite open rectangular prism. Green's function usually is expressed as a series of images which is slowly convergent, and that is why we transform it into an integral representation which is rapidly convergent and stable. Many examples are herein given and discussed for the numerical applications of the above two cases; and then we make a comparison between our calculations and some others.
Thermoelastic Problem for an Infinite Plate with a Curvilinear Hole Having Finite Poles
Authors: Abdou M.A. , Salama F.A.
Published: June 2016

In the present paper, Muskhelishvili's complex variable method of solving two-dimensional elasticity problems has been applied to derive exact expressions for Goursat's functions for the boundary value problems of the infinite plate weakened by a hole having many poles and arbitrary shape which is conformally mapped n the dorhain outside a unit circle by means of general rational mapping function. Also the components of stress are obtained, when a stationary heat is flowing uniformly in the perpendicular direction of the hole. Some applications are considered. The interesting cases when the shape of the hole takes different shapes are included as special cases.
On the Unsteady Flows Generated by Impulsive Motion of a Boundary
Authors: Erdogan M. , Lmrak C.
Published: June 2016

Some properties of unsteady unidirectional flows of viscous fluids are examined for flows impulsively started from rest by the motion of a boundary or two boundaries. Three illustrative examples are given. The first example is the unsteady Couette flow, the second is the unsteady flow between two parallel plates suddenly set in motion with the same speed and the third is the unsteady flow in a circular cylinder moving parallel to its length. It is shown that if the conditions for which the values of the quantities such as velocity, flux and skin friction obtained for large times are nearly the same with those obtained for small times are established, the expressions of the quantities obtained for one of large times or small times can also be used for the Other.