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Publisher: Horizon Research Publishing   (Total: 54 journals)   [Sort by number of followers]

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Advances in Diabetes and Metabolism     Open Access   (Followers: 21)
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Bioengineering and Bioscience     Open Access   (Followers: 1)
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Chemical and Materials Engineering     Open Access   (Followers: 18)
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Computational Research     Open Access   (Followers: 1)
Computer Science and Information Technology     Open Access   (Followers: 13)
Energy and Environmental Engineering     Open Access   (Followers: 7)
Environment and Ecology Research     Open Access   (Followers: 8)
Food Science and Technology     Open Access   (Followers: 3)
Immunology and Infectious Diseases     Open Access   (Followers: 9)
Intl. J. of Biochemistry and Biophysics     Open Access   (Followers: 1)
Intl. J. of Cardiovascular and Cerebrovascular Disease     Open Access   (Followers: 2)
Intl. J. of Neuroscience and Behavioral Science     Open Access   (Followers: 1)
Linguistics and Literature Studies     Open Access   (Followers: 4)
Manufacturing Science and Technology     Open Access   (Followers: 3)
Mathematics and Statistics     Open Access   (Followers: 5)
Nanoscience and Nanoengineering     Open Access   (Followers: 1)
Natural Resources and Conservation     Open Access   (Followers: 6)
Nursing and Health     Open Access   (Followers: 4)
Open J. of Dentistry and Oral Medicine     Open Access  
Sociology and Anthropology     Open Access   (Followers: 5)
Sport and Art     Open Access   (Followers: 1)
Universal J. of Accounting and Finance     Open Access   (Followers: 2)
Universal J. of Agricultural Research     Open Access   (Followers: 1)
Universal J. of Applied Mathematics     Open Access   (Followers: 5)
Universal J. of Applied Science     Open Access   (Followers: 2)
Universal J. of Biomedical Engineering     Open Access  
Universal J. of Chemistry     Open Access  
Universal J. of Clinical Medicine     Open Access  
Universal J. of Communications and Network     Open Access  
Universal J. of Computational Mathematics     Open Access   (Followers: 5)
Universal J. of Control and Automation     Open Access   (Followers: 3)
Universal J. of Educational Research     Open Access   (Followers: 1)
Universal J. of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Universal J. of Engineering Science     Open Access   (Followers: 2)
Universal J. of Food and Nutrition Science     Open Access   (Followers: 5)
Universal J. of Geoscience     Open Access   (Followers: 3)
Universal J. of Industrial and Business Management     Open Access   (Followers: 1)
Universal J. of Management     Open Access   (Followers: 1)
Universal J. of Materials Science     Open Access   (Followers: 3)
Universal J. of Mechanical Engineering     Open Access   (Followers: 13)
Universal J. of Medical Science     Open Access  
Universal J. of Microbiology Research     Open Access  
Universal J. of Physics and Application     Open Access   (Followers: 2)
Universal J. of Plant Science     Open Access  
Universal J. of Psychology     Open Access   (Followers: 3)
Universal J. of Public Health     Open Access   (Followers: 2)
World J. of Computer Application and Technology     Open Access   (Followers: 3)
Journal Cover
Universal Journal of Applied Mathematics
Number of Followers: 5  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2331-6446 - ISSN (Online) 2331-6470
Published by Horizon Research Publishing Homepage  [54 journals]
  • Modeling of WSN Energy Consumption Supplied by iPV Microsystem

    • Abstract: Publication date:  Mar 2018
      Source:Universal Journal of Applied Mathematics  Volume  6  Number  2  Abir Kessebi   and Bahri Rezig   Current researches on wireless sensor networks (WSN) are focusing on reducing the total amount of energy consumption and extending the network lifetime. WSN have many application fields like industry, health care, commercial and residential applications. The main goal of this paper is to evaluate, using MATLAB/Simulink simulations, the average amount of energy consumed in a WSN based on a clustering topology; to predict the optimal number of clusters in order to optimize the energy and also to study the cloud integration effects on lifetime and energy time dependency. The clustering topology is based on defining K clusters with N/k nodes, each node transmits data to the cluster head which will collect data from all of its own nodes, compute it and send it to the base station (BS). In our simulation, we have focused on many principal metrics in WSN such as optimal number of clusters, duty cycle, lifetime and distance to BS. Finally we have studied the effect of integrating cloud into classic WSN, the effect in terms of energy consumption and sensor node lifetime.
      PubDate: Mar 2018
  • Mathematical Analysis of Aerodynamic Potential of Ebola Virus Particle

    • Abstract: Publication date:  Mar 2018
      Source:Universal Journal of Applied Mathematics  Volume  6  Number  2  David Blackman Hon.   In aerodynamics, there are two types of surfaces: stiff and flexible. Stiff surfaces may gain energy from differential wind velocity on opposite sides of the particle. Flexible surfaces dissipate such energy through flutter i.e. like the tail of a kite. Kites have two components, the airfoil and the tail. Airfoils provide lift for the kite through the differential air currents. In such a dichotomous world the Ebola virus resembles the tail of the kite as opposed to the airfoil. One would expect the Ebola virus to flutter and fall. Through mathematical analysis of the electron micrograph it is concluded that the virus is not airborne, but it is probably waterborne.
      PubDate: Mar 2018
  • A Numerical Solution for a Frictional Contact Problem between an
           Orthotropic Strip and Punch System

    • Abstract: Publication date:  Jan 2018
      Source:Universal Journal of Applied Mathematics  Volume  6  Number  1  Hüseyin Oğuz   and Elçin Yusufoğlu   In this study, a numerical solution of elasticity problem is examined. This problem is a plane contact problem. The frictional contact problem for an elastic strip under a rigid punch system is considered. The frictional contact problem is related to infinite length elastic strip in contact with N punches under the influence of horizontal and vertical forces. The lower boundary of the strip is hinged. The solution of contact problems is often reduced to the solution of an integral equation. This integral equation system can be derived from contact problem by using the basic equations of elasticity theory and the given boundary conditions. The singular integral equation system is solved with the help of Gauss Jacobi Quadrature Collocation Method. The frictional contact problem for a homogenous and orthotropic elastic layer are investigated numerically the pressure distribution under the punch system due to the geometrical and mechanical properties of elastic layer are examined and the results are shown in the graphics and tabular form.
      PubDate: Jan 2018
  • Modeling the Behavior of Virtual Systems with Endogenously Shaping

    • Abstract: Publication date:  Jan 2018
      Source:Universal Journal of Applied Mathematics  Volume  6  Number  1  G.P. Vinogradov   The problem of constructing a choice model of an agent endogenously shaping purposes of his evolution is under debate. It is demonstrated that its solution requires the development of well-known methods of decision-making while taking into account the relation of action mode motivation to an agent's ambition to implement subjectively understood interests and the environment state. The latter is submitted for consideration as a purposeful state situation model that exists only in the mind of an agent. It is the situation that is a basis for getting an insight into the agent's ideas on the possible selected action mode results. The agent's ambition to build his confidence in the feasibility of the action mode and the possibility of achieving the desired state requires him to use the procedures of forming a model-representation based on the measured values of the environment state. This leads to the gaming approach for the choice problem and its solution can be obtained on a set of trade-off alternatives.
      PubDate: Jan 2018
  • Hamiltonian Mechanical System with Split Quaternions

    • Abstract: Publication date:  Jan 2018
      Source:Universal Journal of Applied Mathematics  Volume  6  Number  1  Cansel Yormaz   Serife Naz Elmas   and Simge Simsek   In this article, firstly we study about geometrical applications of split quaternions. Then, we obtain Hamitonian mechanical systems with Split quaternions. Quaternionic and Coquaternionic (split analoque of quaternions) extensions of Hamiltonian mechanics are introduced and are shown as offer a unifying framework for quantum mechanics. This study leads to the possibility of employing algebraic techniques of quaternions and coquaternions to absorbing in quantum mechanics. The founded equations are compared with the Hamiltonian energy equations generally are known and the Hamilton energy equations are obtained in Minkowski space.
      PubDate: Jan 2018
  • A Neural Network-based Hybrid Method to Generate Feasible Neighbors for
           Flexible Job Shop Scheduling Problem

    • Abstract: Publication date:  Jan 2018
      Source:Universal Journal of Applied Mathematics  Volume  6  Number  1  Aydin Teymourifar   and Gurkan Ozturk   In this paper, a hybrid method is proposed to generate feasible neighbors for the flexible job shop scheduling problem. Many of the optimization and artificial intelligence methods have been used to solve this important and NP-hard combinatorial problem which provides the basis for solving real-life problems. It is well-known that for such problems the hybrid methods obtain better results than the other approaches. For instance, the applied non-hybrid neural networks for the combinatorial problems, as the Hopfield neural network, usually converge early. Also, their results almost always contain large gaps. These shortcomings prevent them to find good results. Another necessity for a quality search is to find suitable neighbors of the obtained solutions; however, it is possible to create infeasible neighbors during the optimization process. The aim of this study is to overcome these deficiencies. In the suggested approach, at first, an initial solution is generated and then using the left shift heuristics, its gaps are removed. Based on the critical path and critical block concepts, 6 neighbors are constructed for the obtained solution. After the generation of each neighbor, a neural network runs and controls the constraints of the problem. If the achieved neighbor is feasible it is saved. Else if it is infeasible, the neural network tries to transform it into a feasible solution. This is done by applying penalties to the start time of the operations on the violated constraints, which shifts them to the right or the left. During this process, if there are not any violated constraints, the neural network reaches the stable condition so it stops and the obtained solution is saved as a feasible neighbor. Otherwise, after a certain number of the iterations, it stops without any feasible neighbors. Then these steps are repeated for the other created neighbors. This constraint-based process provides an effective and diverse search. Finally, the obtained neighbors, are improved using the left shift heuristics. Also to demonstrate the importance of the initial solutions, they are generated randomly and also using the Giffler and Thompson's heuristic. The comparison between the proposed approach and the methods from the literature shows that it constructs better neighbors. However, using the Giffler and Thompson heuristic to create the initial solution improves the results significantly.
      PubDate: Jan 2018
  • Difficulties of Computing Natural Convection Flow in an Open Cavity

    • Abstract: Publication date:  Sep 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  4  M. Z. I. Bangalee   Roushanara Begum   M. Ferdows   Md. Matiar Rahman   and Mir Shariful Islam   The buoyancy driven natural convection flow in an open cavity has become an important issue to study. In this study, the difficulties of computing natural convection flow in open cavity with an extended computational domain around the cavity are reported. The κ-ε turbulence model is used for the computation to capture the turbulence nature of the air flow inside the cavity. ANSYS CFX software is used to solve the governing equations in this study. Effects of different aspect ratio and different temperature at the left wall and thus the temperature difference between the left and the right walls are analyzed numerically as well. Average mass flow, temperature, velocity etc. at different location in the cavity for different boundary conditions are studied and reported. A comparison between the present work and a previous work is also reported here to validate the methodology. Finally, relations among non-dimensional parameters (e.g. Ra, Re, Pr, Nu numbers) are also presented.
      PubDate: Sep 2017
  • Bilateral Contact Problem with Adhesion between Two Bodies for
           Viscoelastic with Long-term Memory and Damage

    • Abstract: Publication date:  Sep 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  4  Souida Boukrioua   Adel Aissaoui   and Nacerdine Hemici   We consider a quasistatic contact problem between two viscoelastic bodies with long-term memory and damage. The contact is bilateral and the tangential shear due to the bonding field is included. The adhesion of the contact surfaces is taken into account and modelled by a surface variable, the bonding field. We prove the existence of a unique weak solution to the problem. The proof is based on arguments of time-dependent variational inequalities, parabolic inequalities, differential equations and fixed point.
      PubDate: Sep 2017
  • Prime Numbers Classification and Composite Numbers Factorization

    • Abstract: Publication date:  Jun 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  3  V. A. Meshkoff   On the ground of Prime Numbers Classification it is generalized approach to Composite Numbers Factorization presented. The resulting task goes to the different Diophantine equations reducing. Some methods of reducing and its practical application, in particular for Fermat numbers, are demonstrated.
      PubDate: Jun 2017
  • Blind Channel Equalization by Adaptive Filter Algorithms

    • Abstract: Publication date:  Jun 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  3  Said Elkassimi   Said Safi   and B. Manaut   This paper proposes an algorithm based on ZF and MMSE methods for blind channel equalization, which is compared with adaptive filter algorithms which are Constant Modulus Algorithm (CMA), Fractional Space CMA (FSCMA) and Sign Kurtosis Maximization Adaptive Algorithm (SKMAA). The simulations show that the proposed algorithm gives satisfied result versus CMA, FSCMA and SKMAA algorithms. The study is done under certain conditions, it is implemented in noisy environment, for different number of symbols and different SNR values with QPSK modulation. Equalization of channel is more performing if we use the proposed algorithms.
      PubDate: Jun 2017
  • Parametric Solutions to Equation (pan+qbn=pcn+qdn) Where 'n' Stands for
           Degree 2, 3, 4, 5, 6, 7, 8 & 9

    • Abstract: Publication date:  Feb 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  1  Seiji Tomita   and Oliver Couto   Historically equation ( pan+qbn+rcn=pun+qvn+rwn ) has been studied for degree 2, 3, 4 etc., and equation (pan+qbn=pcn+qdn ) herein called equation (1) has been published for n=4 ,p=1,q=4 ( 1) by Ajai Choudhry. Also Tito Piezas & others has discussed about equation (1) (Ref. no. 3 & 2). While Ref. no. (1, 2 & 3) deals with equation no. (1) for degree n=4 this paper has provided parametric solutions for degree n=2, 3, 4, 5, 6, 7, 8 & 9. Also there are instances in this paper where parametric solutions have been arrived at using different methods.
      PubDate: Feb 2017
  • An Application of the Generalized Rectangular Fuzzy Assessment Model to
           the van Hiele Level Theory of Geometric Reasoning

    • Abstract: Publication date:  Feb 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  1  Igor Ya. Subbotin   and Michael Gr. Voskoglou   The Generalized Rectangular Fuzzy Assessment Model (GRFAM) is applied for the evaluation of student group acquisition of the van Hiele levels of geometric reasoning and an example is presented illustrating our results. The GRFAM is a variation of the Center of Gravity defuzzification technique created in an effort to treat better the ambiguous assessment cases being at the boundaries between any two successive assessment grades.
      PubDate: Feb 2017
  • A Physical Space-modeled Approach to Lagrangian Equations with Bundle
           Structure for Minkowski 4-space

    • Abstract: Publication date:  Dec 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  5  Simge Simsek   and Cansel Yormaz   The aim of this paper is to apply the necessary and sufficient conditions of well-known Lagrangian equations with time dependent case for Minkowski 4-space. Many fundamental geometrical properties for time dependent Minkowski 4-space have been obtained in this paper. The energy equations have been applied to the numerical example in order to test its performance. In the numerical examples, we have studied with two time parameters (earth and space time) for accordance to Minkowski 4-space coordinates. This idea is an interesting approach to energy function with Earth-time and Space-time in physical comment. Moreover, velocity and two time dimensions for energy movement equations have been presented a new concept. This study show some physical application of those equations and interpretations are made in Minkowski space too. Results showed that Lagrangian functions for any surface are same type and depend on time coordinates.
      PubDate: Dec 2017
  • Skewable Matrices over ∧2V Applied to Locally Metric

    • Abstract: Publication date:  Dec 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  5  Mihail Cocos   and Kent Kidman   A necessary condition for a connection in a vector bundle to be locally metric is for its curvature matrix, which consists of 2 forms, to be skew symmetric with respect to some local frame. In this paper we give a simple algorithm that can be used to decide when a matrix of 2 forms is equivalent to a skew symmetric matrix. We apply this algorithm to verify whether a full rank curvature connection is locally metric.
      PubDate: Dec 2017
  • Common Fixed Point Theorems for Weakly Subsequentially Continuous Mappings
           in Modified Intuitionistic Fuzzy Metric Spaces

    • Abstract: Publication date:  Dec 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  5  Naeem Salem   and Said Beloul   The aim of this paper is to establish some common fixed point results for two weakly subsequentially continuous and compatible of type (E) pairs of self mappings via implicit relation in modified intuitionistic fuzzy metric spaces, also we give an example to illustrate our results.
      PubDate: Dec 2017
  • On Pointwise Feedback Invariants of Linear Parameter-varying Systems

    • Abstract: Publication date:  Dec 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  5  R. Marta García Fernández   and Miguel V. Carriegos   Linear systems with constant real coefficients are completely described in terms of feedback actions. In this paper the problem is studied in the framework of linear systems where coefficients depending continuously on a set of parameters. Some invariants are given as well as criteria to find a complete classification in low dimension.
      PubDate: Dec 2017
  • Child Support, Pensions and Endogenous (and Heterogeneous) Fertility

    • Abstract: Publication date:  Apr 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  2  András Simonovits   In van Groezen, Leers and Meijdam (2003) (for short, GLM), the government pays child support and pensions to raise fertility and replace the insufficient old-age saving of myopic workers, respectively. Concentrating on the equilibrium core of GLM, we analyze its simplest possible versions. We impose credit constraint on workers, and extend GLM's analysis to heterogeneous rearing costs and preferences for enjoying children. Two major results: (i) the infusion of public transfers only raises social welfare when the bulk of private savings has been crowded out; (ii) the introduction of fertility-dependent pensions raises average fertility but diminishes welfare.
      PubDate: Apr 2017
  • Visualization of Xylary Rings of Stems of Artemisia tridentata spp.

    • Abstract: Publication date:  Apr 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  2  Michael Scarinci   Katherine Encarnacion   Angel R. Pineda   and Lance S. Evans   Plants of the many subspecies of Artemisia tridentata are dominant shrubs of the Great Basin Desert of the United States. Many subspecies of Artemisia tridentata show extensive eccentric growth in which vascular cambium dies and no longer produces secondary xylem in stems. The purpose of this study was to create three-dimensional images of xylary rings from stem segments so that characteristics of individual xylary rings among successive segments could be accurately represented. Four stem segments from a branch were sized and aligned in MATLAB. Three xylary rings were given a unique color for visualization. All portions of images were removed so only the xylary rings were visible. Rings of the four segments were aligned to make a three-dimensional visualization. The images were analyzed to determine the locations of complete rings, locations of partial rings, percentages of arcs of rings of individual rings, and calculations of ring areas. Eccentric growth is localized. For example, on one stem segment all three rings were complete while the next segment 20 mm along the stem had two incomplete rings. The visualization and resulting data generated provide information about eccentric growth which, in turn, reflects the overall health and mechanical stability of stems.
      PubDate: Apr 2017
  • Direct Numerical Simulation of the Airfoil Segment's Flutter and its
           Effect on the Aerodynamic Force

    • Abstract: Publication date:  Apr 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  2  Andrei Zelenyy   and Alexey Bunyakin   This article presents numerical simulation of planar potential flow around an airfoil with possibility of changing its shape. Two-dimensional unsteady flow model with scalar velocity potential, which allows us to calculate pressure distribution along an airfoil from Cauchy-Lagrange integral, is used. For this purpose, an airfoil contour is approximated by a complex cubic spline with possibility of displacement its vertices. This algorithm has been used in the context of fluid-structure interaction and has been applied successfully to determination of stability of an elastic airfoil segment interacting with a flow stream, so-called panel flutter problem. Calculation of external flow is carried out by vortex panel method with Kutta-Joukowski trailing edge condition, which makes mathematical solution unique. Using this method of approximation of an airfoil in combination with the method of discrete vortices provides a semi-analytical solution for complex potential for whole computational domain of air flow. This solution significantly accelerates process of numerical computation of time-averaged aerodynamic force as well as the dynamic stability problem for aeroelastic wing design and temporal evolution of its natural disturbances.
      PubDate: Apr 2017
  • A New Analytical Method for Solving General Riccati Equation

    • Abstract: Publication date:  Apr 2017
      Source:Universal Journal of Applied Mathematics  Volume  5  Number  2  Yasar Pala   and Mutlu Ozgur Ertas   In this paper, the general Riccati equation is analytically solved by a new transformation. By the method developed, looking at the transformed equation, whether or not an explicit solution can be obtained is readily determined. Since the present method doesn't require a proper solution for the general solution, it is especially suitable for equations whose proper solutions cannot be seen at a first glance. Since the transformed second order linear equation obtained by the present transformation has the simplest form it can have, it is immediately seen whether or not the original equation can be solved analytically. The present method is exemplified by several examples.
      PubDate: Apr 2017
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