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60 articles for “Freedom”
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Research ArticleOpen accessIn the abstractPhysical and Geometrical Effects on the Vibratory Pattern of a Pipe Carrying Fluid FlowDahmane Mouloud, Samir Zahaf, Mawhoub Soubih et al.In this research, the first natural frequencies and critical velocities of a fluid flow-conveying pipe are obtained with finite element method. By discretizing the structure wall and fluid flow, starting from beam type with two degrees of freedom per node. We determine the equation of motion from the fluid-structure coupling using Lagrange energy principle. Parameters frequencies and critical velocity of … …Current Research in Bioinformatics, Vol. 9, Issue 1 · 22 Oct 2020 · 11,396 accessesView PDFCite
Research ArticleOpen accessIn the abstractNumerical Study of Post-Buckling of Clamped-Pinned Pipe Carrying Fluid Under Different ParametersDahmane Mouloud, Samir Zahaf, Mawhoub Soubih et al.This research aims to calculate the first three natural frequencies and critical velocity of a fluid-conveying pipe are obtained with numerical approach with standard finite element method and this by discretizing the structure wall and internal flow, starting from beam type with two degrees of freedom per node. The determination is done to the vibrational equation from the fluid-structure coupling … …Current Research in Bioinformatics, Vol. 9, Issue 1 · 21 Sep 2020 · 12,076 accessesView PDFCite
Research ArticleOpen accessIn the abstractAdaptive and Neural Network Based Control of Pitch of Unmanned Aerial VehiclesMackenzie T. Matthews, Sun YiThe objective is to develop a new control strategy for quadrotor types of Unmanned Aerial Systems (UAVs) that assist in closing the existing research gaps between the undesired uncertainties and current control systems. This research investigates a system modeling and the effectiveness of error elimination through adaptation in the change of the plant/system’s output. The UAV is controlled via Wi-Fi … …Journal of Mechatronics and Robotics, Vol. 3, Issue 1 · 18 Nov 2019 · 6,489 accessesView PDFCite
Research ArticleOpen accessIn the abstractInverse Kinematics (IK) Solution of a Robotic Manipulator using PYTHONR. Venkata Neeraj Kumar, R. SreenivasuluPresent global engineering professionals feels that, robotics is a somewhat young field with extremely ruthless target, the crucial one being the making of machinery/equipment that can perform and feel like human beings. Robot kinematics deals with the study of motion of linkages which includes displacement, velocities and accelerations of a robot manipulator analytically. Deriving the proper kinematic models for an … …Journal of Mechatronics and Robotics, Vol. 3, Issue 1 · 10 Sep 2019 · 13,883 accessesView PDFCite
Research ArticleOpen accessIn the abstractState-Space Modelling of a Rocket for Optimal Control System DesignAliyu Bhar Kisabo, Aliyu Funmilayo Adebimpe, Odooh Clement Okwo, Sholiyi Olusegun SamuelIn this study, we present the derivation of the mathematical model for a rocket’s autopilot in state-space. The basic equations defining the airframe dynamics of a typical six-Degree-of-Freedom (6DoF) are non-linear and coupled. Separation of these nonlinear coupled dynamics is presented as lateral and longitudinal dynamic equations. The need to determine aerodynamic coefficients and there derivative components are brought to … …Journal of Aircraft and Spacecraft Technology, Vol. 3, Issue 1 · 25 May 2019 · 13,632 accessesView PDFCite
Research ArticleOpen accessIn the abstractDynamic Models for Rigid Memory MechanismsRelly Victoria Virgil PetrescuThe paper presents a dynamic model that works with variable internal damping, applicable directly to rigid memory mechanisms. If the problem of elasticity is generally solved, the problem of system damping is not clear and well-established. It is usually considered a constant "c" value for the internal damping of the system and sometimes the same value c and for the … …Journal of Mechatronics and Robotics, Vol. 3, Issue 1 · 6 May 2019 · 5,981 accessesView PDFCite
Research ArticleOpen accessIn the abstractFree Enterprise and Entrepreneurship in Serbia: An Analysis of Motivations, Financing and ObstaclesNina Radojevich-KelleyProblem statement: Entrepreneurship is considered to be a major driving force to economic development throughout the world. Free enterprise is challenging in any country, especially in a developing nation such as Serbia where communism and socialism prevailed for decades. The purpose of this study is to examine entrepreneurship and free enterprise in Serbia as well as the challenges or obstacles … …American Journal of Economics and Business Administration, Vol. 3, Issue 2 · 21 Apr 2011 · 8,046 accessesView PDFCite
Research ArticleOpen accessIn the abstractCausal Factors Influencing Adversity Quotient of Twelfth Grade and Third-Year Vocational StudentsRachapoom Pangma, Sombat Tayraukham, Prasart NuangchalermProblem statement: The aim of this research was to study the causal factors influencing students’ adversity between twelfth grade and third-year vocational students in Sisaket province, Thailand. Six hundred and seventy two of twelfth grade and 376 third-year vocational students were selected by multi-stage random sampling techniques. Approach: The instruments used for collecting data were: A scale on self-esteem, a … …Journal of Social Sciences, Vol. 5, Issue 4 · 31 Dec 2009 · 8,103 accessesView PDFCite
Research ArticleOpen accessIn the abstractPolitical Stability and Economic Growth in AsiaMuhammad Younis, Xu Xiao Lin, Yahya Sharahili, Santhirasegaram SelvarathinamThis study investigates the effects of various factors of political instability on economic growth in selected ten Asian economies during 1990-2005. Our empirical findings show a close relationship between political stability and economic growth. We have analyzed the data by using ordinary least squire econometrics methods, which conclude that 32.35 scores increasing of index of political stability leads to one … …American Journal of Applied Sciences, Vol. 5, Issue 3 · 31 Mar 2008 · 8,556 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Analysis of High Dimensional Contingency Table with InteractionsKeorapetse Sediakgotla, Lesego Gabaitiri, Keamogetse Setlhare et al.This paper is focused on the analysis of categorical data in a 2 × c × K contingency table. The theoretical frame work of a 2 × c design is extended to 2 × c × K with provision for testing interactions among subsets of either lower or upper columns of the designated table. The developed chi square tests for … …American Journal of Applied Sciences, Vol. 14, Issue 8 · 30 Aug 2017 · 7,651 accessesView PDFCite