98 articles for “frame study”

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Research ArticleOpen accessIn the abstractOrthogonal Frequency Division Multiplexing Timing Synchronization in Multi-Band Orthogonal Frequency Division Multiplexing Ultra-Wideband SystemsAymen M. Karim, Md. Shabiul Islam, Masuri OthmanProblem statement: MB-OFDM UWB systems have attractive features and received a great attention. It has the capability of sending/receiving data at rates in access of 100 Mbits sec-1. Owing to the sensitivity of OFDM systems to synchronization errors, a fast synchronization algorithm is required to discern for the start of OFDM symbol. Existing approaches to OFDM time synchronization rely on … …American Journal of Applied Sciences, Vol. 7, Issue 3 · 31 Mar 2010 · 7,422 accessesView PDF Cite

Research ArticleOpen accessIn the abstractRegional Development Model for East AzerbaijanHamid R. AlipourProblem statement: Economic development is a process through which scientific-technical production principles change from a traditional status to a modern one. Development is an important event that not only encompasses the government duties, but alters the regional statesmen to be active elements in the development as well. Along the same lines, the present economic trends around the world tend to … …Journal of Social Sciences, Vol. 5, Issue 2 · 30 Jun 2009 · 8,130 accessesView PDF Cite

Research ArticleOpen accessIn the abstractDesigning Omni-Directional Mobile Robot with Mecanum WheelJefri Efendi Mohd Salih, Mohamed Rizon, Sazali Yaacob et al.This study presents the processes undertaken in the design and development of an intelligent omni-directional mobile robot using four custom-made mecanum wheels. The mecanum wheel developed consists of nine rollers made from delrin. All mecanum wheels are independently powered using four units of precisian gear DC motors and the wheel/motor assemblies were mounted directly to the robot chassis made using … …American Journal of Applied Sciences, Vol. 3, Issue 5 · 31 May 2006 · 9,593 accessesView PDF Cite

Research ArticleOpen accessIn the abstractY: A New Component-Based Software Life Cycle ModelLuiz F. CapretzWith the need to produce ever larger and more complex software systems, the use of reusable components has become increasingly imperative. Of the many existing and proposed techniques for software development, it seems clear that component-based software development will be at the forefront of new approaches to the production of software systems and holds the promise of substantially enhancing the … …Journal of Computer Science, Vol. 1, Issue 1 · 31 Mar 2005 · 7,396 accessesView PDF Cite

Research ArticleOpen accessAll words, across the recordSingle Step Optimal Block Matched Motion Estimation with Motion Vectors Having Arbitrary Pixel PrecisionsCharlotte Yuk-Fan Ho, Bingo Wing-Kuen Ling, Saverio Giovanni Blasi et al.Problem statement: This study derives the optimal motion vector with arbitrary pixel precisions in a single step. Approach: A non-linear block matched motion model was proposed. Based on the proposed non-linear block matched motion model, the optimal motion vector which minimizes the mean square error was solved analytically in a single step via a gradient approach. Results: The mean square … …American Journal of Engineering and Applied Sciences, Vol. 4, Issue 4 · 12 Jan 2012 · 8,201 accessesView PDF Cite

Research ArticleOpen accessAll words, across the recordPerformance of IBS Precast Concrete Beam-Column Connections Under Earthquake Effects: A Literature ReviewPatrick Tiong Liq Yee, Azlan Bin Adnan, Abdul Karim Mirasa, Ahmad Baharuddin Abdul RahmanProblem statement: Despite demonstrating rather much benefits comparing to the conventional cast-in-place construction, the acceptance level of precast concrete building is still reportedly low in Malaysia. The implication imposed by stricter seismic design provisions would only worsen the matter. Approach: The main objective of this study was to identify the most appropriate type of beam-column connections to be introduced to … …American Journal of Engineering and Applied Sciences, Vol. 4, Issue 1 · 31 Jan 2011 · 17,554 accessesView PDF Cite

Research ArticleOpen accessAll words, across the recordSeismic Assessment of Non-Seismically Designed Reinforced Concrete Frames with Core WallsTaek-Hyun Lee, Ki-Bong Choi, Taher Abu-LebdehThis study examines the seismic performance of four non-seismically designed reinforced concrete structures with core walls and proposes proper rehabilitation methods. The structures were selected based on the height of the structures, occupancy levels and floor plans. The seismic assessment results were compared based on the performance of the structures before rehabilitation and after rehabilitation. The results indicate that most … …American Journal of Applied Sciences, Vol. 11, Issue 11 · 13 Dec 2014 · 6,609 accessesView PDF Cite

Research ArticleOpen accessAll words, across the recordAn Analysis of Power Aware Congestion Control Multipath Multicast Protocol for Mobile Ad hoc NetworkDuraiswamy Karuppaswamy, Vijayaragavan ShanmugamProblem statement: In MANETs, wireless link transmission errors, mobility and congestion are major causes for packet loss. Mobility may cause packet loss in different ways. Whereas congestion in a network occurs, whenever the demands exceed the maximum capacity of a communication link especially when multiple hosts try to access a shared media simultaneously. Approach: In this study, we proposed a … …Journal of Computer Science, Vol. 6, Issue 12 · 2 Nov 2010 · 7,038 accessesView PDF Cite