Design and Modelling Long Stroke Linear Permanent Magnet Machine

The awareness for the need of renewable energy has been increasing due to the environmental impacts from the current power generation system and its increasing operation cost. With increasing demand of electrical power especially in Malaysia which is projected to reach 274TWh in 2030, renewable energy will be a good alternative for fossil fuel energy. One of the promising renewable energy is the tidal wave energy. Therefore, this project aims to design and model a long stroke permanent magnet linear generator for tidal wave system. The specific objectives of this project are to conduct literature review for various types of linear machine, to propose new topologies design for tidal wave generating system, to design, model and simulate the proposed new topologies and to choose the best design base on the analysis result. The literature review on various types of linear machine has been carried out thorough reading of journals, textbooks and various. Linear permanent magnet machines come in various topologies such as moving-coil, moving-iron, and moving-magnet. Then, two new different topologies of linear permanent magnet will be proposed. Finite element analysis and optimisation of the proposed designs have been simulated using Finite Element Method Magnetics, FEMM software

Mobile Appointment System For Universities

This study explores the implementation of mobile based application as a mediator at the educational operations. The usage of the mobile devices becomes more popular recently, and the wireless technology producers provide the markets and customers with various kinds of hardware and applications which allow customers to use these services from any where and at any time, and this is the main interest in using the mobile based applications. This study focuses on managing the lecturer consulting hours in order to improve the communication between lecturers and students, which are related to the appointment operations The study aims to take advantages of the wide usage of the mobile application to solve inefficiency in student-lecturer appointments which exists in University Utara Malaysia (UUM), and to shift the existing appointment management operation from desktop based application to mobile-based application

What happened to savings during the financial crisis: a dynamic panel analysis of Asian-5 countries.

This article examines the determinants of saving rates in five Asian (Asian-5; Malaysia, Singapore, Thailand South Korea and the Philippines) countries over the 1970-2000 period. The focus is on the relationship between savings rates and foreign capital inflows before and in the financial crises. Major findings from the dynamic panel regressions are: (i) foreign savings depresses domestic savings ratio in the short as well as in the long run and the offset appears to be larger in the crisis period; (ii) real interest has a small negative effect on savings in the short and long run; (iii) the demographic factor explains a large portion of the long run trends but not the short-term fluctuations in savings rates; and (iv) high savings ratios in the countries studied is linked to the export sector. © Springer Science+Business Media, LLC 2006

Foreign capital flows and economic growth in East Asian countries

This paper provides a quantitative assessment of the effect of various types of capital flow on the growth process of the East Asian countries, including China. The empirical analysis was based on dynamic panel data and we found; first, that domestic savings contribute positively to long-term economic growth. Second, we confirmed that FDI is growth enhancing and that its impact is felt both in the short and long run. Additionally, FDI influence on growth is much higher than domestic savings. Third, short-term capital inflow has adverse effect on the long-term as well as short-term growth prospects and it appears to be sensitive to long-term capital inflows. Fourth, long-term debt has positive effect on growth but its effect does somewhat disappear in the long-term. By and large, the observed positive contribution of FDI in the growth process of East Asian economies is a robust finding. From policy perspective, the evidence convincingly suggests that countries that are successful in attracting FDI can finance more investments and grow faster than those that deter FDI

Adaptive unicast video streaming with rateless codes and feedback.

Video streaming over the Internet and packet-based wireless networks is sensitive to packet loss, which can severely damage the quality of the received video. To protect the transmitted video data against packet loss, application-layer forward error correction (FEC) is commonly used. Typically, for a given source block, the channel code rate is fixed in advance according to an estimation of the packet loss rate. However, since network conditions are difficult to predict, determining the right amount of redundancy introduced by the channel encoder is not obvious. To address this problem, we consider a general framework where the sender applies rateless erasure coding to every source block and keeps on transmitting the encoded symbols until it receives an acknowledgment from the receiver indicating that the block was decoded successfully. Within this framework, we design transmission strategies that aim at minimizing the expected bandwidth usage while ensuring successful decoding subject to an upper bound on the packet loss rate. In real simulations over the Internet, our solution outperformed standard FEC and hybrid ARQ approaches. For the QCIF Foreman sequence compressed with the H.264 video coder, the gain in average peak signal to noise ratio over the best previous scheme exceeded 3.5 decibels at 90 kilobits per second.DFG (German Research Foundation

Robust live unicast video streaming with rateless codes

"This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.""©2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE."We consider live unicast video streaming over a packet erasure channel. To protect the transmitted data, previous solutions use forward error correction (FEC), where the channel code rate is fixed in advance according to an estimation of the packet loss rate. However, these solutions are inefficient under dynamic and unpredictable channel conditions because of the mismatch between the estimated packet loss rate and the actual one.We introduce a new approach based on rateless codes and receiver feedback. For every source block, the sender keeps on transmitting the encoded symbols until it receives an acknowledgment from the receiver indicating that the block was decoded successfully. Within this framework, we provide an efficient algorithm to minimize bandwidth usage while ensuring successful decoding subject to an upper bound on the packet loss rate. Experimental results showed that compared to traditional fixed-rate FEC, our scheme provides significant bandwidth savings for the same playback qualityThis work was supported by the DFG Research Training Group GK-1042

Optimal packet loss protection of progressively compressed 3D meshes

©20009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.We consider a state of the art system that uses layered source coding and forward error correction with Reed- Solomon codes to efficiently transmit 3D meshes over lossy packet networks. Given a transmission bit budget, the performance of this system can be optimized by determining how many layers should be sent, how each layer should be packetized, and how many parity bits should be allocated to each layer such that the expected distortion at the receiver is minimum. The previous solution for this optimization problem uses exhaustive search, which is not feasible when the transmission bit budget is large.We propose instead an exact algorithm that solves this optimization problem in linear time and space. We illustrate the advantages of our approach by providing experimental results for the CPM (Compressed Progressive Meshes) mesh compression techniqueDFG Research Training Group GK-1042