...Electrical and Electronics Principles Contents Question 1.2 3 Question 1.3 a) 3 Question1.3) b) 5 Question 1.4) 5 Question 3.2) i) 6 Question 3.2) ii) 9 Question 4.1) 10 Question 4.2 11 References 11 Question 1.2 E2=3V 18Ω 2Ω E1=8V E2=3V 18Ω 3Ω E1=8V 2Ω 18Ω 2Ω 3Ω 3Ω Using Superposition Theorem, 3V source is removed to calculate the contribution of the 8 V supply. Similarly, 8V source is removed to calculate currents due to 3V supply. a) Voltage across the 18 ohm resistor is 4.6872 volts and current across is 0.2604 amperes; b)Current in the 8V generator is 1.667 amperes; c) Current in the 3V generator is 0.656 amperes. (John, 2003) Question 1.3 a) Transformers are electrical devices that play a very vital and key role in electrical power distribution and transmission systems. They are static devices, that is, they do not have any moving components. Transformers utilize one of the most basic forces in nature, the electromagnetic force to convert alternating electrical energy of one power rating to another power rating, but do not change the frequency of the primary electrical energy. Voltage transformers are used to lower or raise the magnitude of the incoming voltage and accordingly current increases or decreases. Electromagnetic induction is used to perform this conversion, more specifically mutual induction. In a simple voltage transformer, two coils are present that have common magnetic flux in between...
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...LOSS COMPARISON OF TWO AND THREE-LEVEL INVERTER TOPOLOGIES G. I. Orfanoudakis*, S. M. Sharkh*, M. A. Yuratich† and M. A. Abusara* * University of Southampton, UK, † TSL Technology, UK G.I.Orfanoudakis@soton.ac.uk Keywords: Inverter, DC-link capacitors, losses. Abstract This paper investigates semiconductor and DC-link capacitor losses in two two-level and two three-level voltage source inverters. The components of the four inverters are selected to have appropriate voltage and current ratings. Analytical expressions for semiconductor losses are reviewed and expressions for DC link capacitor losses are derived for all topologies. Three-level inverters are found to have lower semiconductor losses, but higher DC-link capacitor losses. Overall, the three-level Neutral-Point-Clamped inverter proved to be the most efficient topology. a. 1 Introduction The process of selecting the topology, components and operating parameters (voltage, current and switching frequency) of an inverter is highly affected by the anticipated inverter losses. An accurate estimate of the losses occurring in each part of an inverter can significantly contribute to achieving an enhanced inverter design. This paper examines the semiconductor and DC-link capacitor losses of four voltage source inverter topologies: the conventional two-level inverter, the two-level two-channel interleaved inverter, the three-level Neutral-Point-Clamped (NPC) inverter and the three-level Cascaded...
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...Working Group in the IEFT The Internet Engineering Task Force (IETF) has an overall mission to make the internet work better and to run faster. The way that they accomplish this is by creating high quality and technical documents that are relevant to influence the way that people use, design and manage through the internet (Working Groups). Within the IETF, there are many different working groups. Working groups in the IETF have primary mechanisms so that the development of IETF and the specifications and guidelines have certain recommendations and standards (Working Groups). Working groups were created so that it can address and fix certain problems. Working groups usually do not last long because once it completes what it was out to do then they no longer are generally needed. There are many active working groups in the IETF. One of the working groups is called Applications Area Working Group (APPSAWG). This group was started in October of 2010. This group focuses on many different topics which might be the reason to why there group has been around for a few years. Some of the main points in which APPSAWG works on include Well-defined security issues that are relevant to multiple application technologies (APPSAWG). Another of the main points that APPSAWG focuses on according to Applications Area Working Group is “small-scale additions to the protocol stack for HTTP and other application technologies, mostly related to service discovery and meta-data”. Then...
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...| Develop Own Effectiveness And Professionalism | OCR Assignment | Phil Ayres4/4/2014 | Contents 1.0 Performance and Personal Goals 2 1.1 Obtain and review feedback from others on performance 2 1.2 Agree personal goals and participate in development activities to meet them 2 2.0 Teamwork Evidence 2 2.1 Effectively manage own time 2 2.2 Recognise and respect diversity, individual differences and perspectives 3 2.3 Accept and provide feedback in a constructive and considerate manner 4 2.4 Understand the responsibilities of colleagues 5 2.5 Identify obstacles to effective teamwork 6 3.0 Report 6 3.1 Identify the implications and applicability for the IT professionals of: 6 3.1.1 Data Protection 6 3.1.2 Computer misuse Act 9 3.2 List the professional bodies for IT 10 4.0 Legislation (Identify the impact on an IT organisation of legislation) 11 4.2 Processing of financial transactions 11 4.3 Health & Safety 11 4.4 Privacy, Confidentiality and Security 13 4.5 Copyright and Intellectual Property Rights 14 5.0 Organisation 15 5.1 list the aims and objectives of the organisation 15 5.2 State the organisation brand or image 15 5.3 Identify the organisation’s structure roles and responsibilities 17 5.4 identify potential improvements to working practices 19 Appendix A1 – Copy of Appraisal 21 1.0 Performance and Personal Goals 2.1 Obtain and review feedback from others on performance See appendix A1 for copy...
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...Power Characteristics of Networks on Chip Mohamed A. Abd El ghany*, Darek Korzec* and Mohammed Ismail** Electronics Engineering Dept., German University in Cairo, Cairo, Egypt* Electrical Engineering Dept., The Ohio State University, Columbus, USA. The RaMSiS Group, KTH, Sweden** E-mails: mohamed.abdel-ghany@guc.edu.eg, darek.korzec@guc.edu.eg, ismail@ece.osu.edu Abstract— Power characteristics of different Network on Chip (NoC) topologies are developed. Among different NoC topologies, the Butterfly Fat Tree (BFT) dissipates the minimum power. With the advance in technology, the relative power consumption of the interconnects and the associate repeaters of the BFT decreases as compared to the power consumption of the network switches. The power dissipation of interswitch links and repeaters for BFT represents only 1% of the total power dissipation of the network. In addition of providing high throughput, the BFT is a power efficient topology for NoCs. Index Terms – NoC, Power Dissipation, BFT. CLICHÉ, Octagon, SPIN, Interswitch Links I. INTRODUCTION With the increasing number of intellectual property blocks (IPs) in System on Chips (SoCs), billions of transistors integrated on a single chip will soon become a reality. The limitations of system scalability, bandwidth and power dissipation are becoming the major drawbacks for high performance SoCs. Recently, Network-on-Chip (NoC) architectures are emerging as the best replacement for the existing...
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...recognition of the importance of our technologies in affecting the quality of life throughout the world, and in ccepting a personal obligation to our profession, its members and the communities we serve, do hereby commit ourselves to conduct of the highest ethical and rofessional manner... — preamble to the IEEE Code of Ethics 3.1 Introduction Some students react with surprise when told that there is even one published code of ethics for the computing disciplines. In fact, almost every professional organization dealing with the field of computing has published its own code of ethics. For this text, I selected the codes published by the two most influential organizations for computer professionals: the Institute of Electrical and Electronics Engineers and the Association for Computing Machinery. I also selected a third code, from the National Society of Professional Engineers. A variety of other professional organizations have published computing codes, such as the Data Processing Management Association and the Institute for Certification of Computer Professionals [6], but I selected the NSPE code because it is still relevant to computing and contains some useful points of contrast to the IEEE and ACM codes. As you study the three codes, it will become apparent that a code of ethics provides a vehicle for promoting a variety of purposes and goals. Luegenbiehl identifies 12 functions a professional code of ethics might have, [5] which I summarize here as 1...
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...communication lines at any given time, you will still be counting long after my lifespan and beyond, there’s that much data. What we witness as everyday patrons who succumb to the thresholds in data communication restrictions if it were to run without direction, then all of our communication would experience extreme latency during transfer. Because of this constant object standing in the way of smooth data transfers, Standards were put in place to monitor and maintain the process. Institute of Electrical and Electronic Engineers or IEEE Institute of Electrical and Electronic Engineers or IEEE, was officially formed in January 1963 from two individual companies the Institute of Radio Engineers (IRE), and American Institute of Electrical Engineers (AIEE). Together they would design what we have come to know today as our internet. The IEEE main function and purpose is to instill a scientific and educational means to advance theory and practices of Electronics, Computer engineering, Electrical, and Communications in their own respective fields. IEEE plays a very big part, much like a conductor for an orchestra, IEEE is the “conductor” and the instruments are the organizations that work under IEEE in organizing our data. International Telecommunication Union (ITU) A well-known Standards Organization known as the International Telecommunication Union (ITU), is an agency of the United Nations. Its original name was the International Telegraph Union, and it was founded in Paris...
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...Biography of Dr. Victor O.K. Li Victor O.K. Li Chair of Information Engineering, Associate Dean of Engineering and Acting Head of Department Education: SB, SM, EE, ScD MIT; F.I.E.E.E., F.I.A.E., F.H.K.I.E. Victor O.K. Li received SB, SM, EE and ScD degrees in Electrical Engineering and Computer Science from the Massachusetts Institute of Technology, Cambridge, Massachusetts, in 1977, 1979, 1980, and 1981, respectively. He joined the University of Southern California (USC), Los Angeles, California, USA in February 1981, and became Professor of Electrical Engineering and Director of the USC Communication Sciences Institute. Since September 1997 he has been with the University of Hong Kong, Hong Kong, where he is Associate Dean (Research) of Engineering, and Chair Professor of Information Engineering at the Department of Electrical and Electronic Engineering. He has also served as Managing Director of Versitech Ltd. the technology transfer and commercial arm of the University, and on various corporate boards. His research is in information technology, including all-optical networks, wireless networks, and Internet technologies and applications. Sought by government, industry, and academic organizations, he has lectured and consulted extensively around the world. Prof. Li chaired the Computer Communications Technical Committee of the IEEE Communications Society 1987-1989, and the Los Angeles Chapter of the IEEE Information Theory Group 1983-1985. He co-founded the International...
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...period, it is withdrawn from the directory. The working group may subsequently publish a revised version of the draft.” (Stallings, p. B-5, 2009). “The IETF is responsible for publishing the RFCs, with approval of the IESG. The RFCs are the working notes of the Internet research and development community. A document in this series may be on essentially any topic related to computer communications and may be anything from a meeting report to the specification of a standard. The work of the IETF is divided into eight areas, each with an area director and each composed of numerous working groups.” (Stallings, p. B-5, 2009). Justify the need of the IEEE 802 standard used in networking. “IEEE 802 is an Institute of Electrical and Electronics Engineers (IEEE) standard set that covers the physical and data link layers of the Open Systems Interconnection (OSI) model. It defines standards and protocols for wired local area networks (WLAN), metropolitan area networks (MAN) and wireless networks; defines characteristics, operating procedures, protocols...
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...REFERENCES #1 “Web Services Glossary,” W3C Working Group Note 11 February 2004, Last retrieved from http://www.w3.org/TR/ws-gloss/ on 31 October2012 #1Rajat Kathuria, 2009, “India: The Impact of Mobile Phones”, Paper Number 9, Policy Paper Series Published by Vodafone Group ) #2ITU (2012), {http://www.itu.int/net/pressoffice/press_releases/2012/70.aspx} #3(World Bank Study, 2012) (http://www.worldbank.org/en/news/2012/07/17/mobile-phone-access-reaches-three-quarters-planets-population accessed on 1st November 2012) #5 Kushchu, I., Kuscu, M., H., 2004. From e-Government to m-Government: Facing the Inevitable. URL http://www.mgovernment.org/resurces/mgovlab_ikhk.pdf. (2009-03-15) Karunamurthy R, Khendek F, Glitho RH. A novel architecture for Web service composition, Journal of Network and Computer Applications 35 (2012) 787–802. Chen, G., & Kotz, D. (2000). A survey of context-aware mobile computing research. Dartmouth College. http://www.cs.dartmouth.edu/reports/TR2000-381.pdf Chen, H., Finin, T., & Joshi, A. (2003). An ontology for context-aware pervasive computing environments. Knowl. Eng. Rev. , 18 (3), 197--207. Chen, I. Y., Yang, S. J., & Zhang, J. (2006). Ubiquitous Provision of Context Aware Web Services. Proceedings of the IEEE international Conference on Services Computing (pp. 60-68). Washington: IEEE Computer Society. Layne, K. & J. Lee (2001) Developing fully functional E-government: A four stage model Government Information Quarterly...
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...|Project |IEEE 802.16 Broadband Wireless Access Working Group | |Title |Nonce based TEK Update for Handover | |Date Submitted |2008-01-21 | |Source(s) |Stavros Tzavidas |Voice: +1-847-632-4313 | | | |E-mail: stavros.tzavidas@motorola.com | | |Motorola Inc. | | | | | | | |1501 W. Shure Dr. | | | |Arlington Heights IL 60004 | | | | ...
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...第 35 卷第 4 期 2013 年 7 月 机器人 ROBOT Vol.35, No.4 Jul., 2013 DOI：10.3724/SP.J.1218.2013.00500 基于图优化的同时定位与地图创建综述 梁明杰 1 ，闵华清 2 ，罗荣华 1 （1. 华南理工大学计算机科学与工程学院， 广东 广州 510006； 2. 华南理工大学软件学院， 广东 广州 510006） 摘 要： 基于图优化的同时定位与地图创建（SLAM）是当前机器人领域的研究热点．从帧间配准、 环形闭合检 测以及优化技术 3 个主要方面对基于图优化的同时定位与地图创建进行综述．对每一个方面，阐述其关键技术，介 绍最新研究进展， 并探讨相关难点问题及解决思路．最后， 对基于图优化的同时定位与地图创建的发展作出展望． 关键词：同时定位与地图创建；配准； 环形闭合检测； 图优化 中图分类号：TP24 文献标识码：A 文章编号：1002-0446(2013)-04-0500-13 Graph-based SLAM: A Survey LIANG Mingjie 1 ，MIN Huaqing 2 ，LUO Ronghua 1 (1. School of Computer Science and Engineering, South China University of Technology, Guangzhou 510006, China; 2. School of Software Engineering, South China University of Technology, Guangzhou 510006, China) Abstract: Graph-based simultaneous localization and mapping (SLAM) is currently a hot research topic in the field of robotics. Frame-to-frame alignment, loop closure detection and graph optimization are three main aspects in graph-based SLAM. For each aspect, the key techniques and current progress are discussed, and the difficult problems and the possible solutions are also analyzed. Finally, the potential future issues and research trends are explored. Keywords: simultaneous localization and mapping; registration; loop closure detection; graph optimization 1 引言（Introduction） 未知环境中，机器人的自主地图创建与自定位 密切相关， 相互依赖． 同时定位与地图创建 （SLAM） 将二者相结合， 其主要思想是： 一方面， 依靠已创建 的地图信息进行自定位；另一方面，根据定位结果 对地图进行更新．SLAM 已成为近年来机器人领域 的热点研究问题，并被认为是实现真正自主机器人 ...
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...IEEE Canada Humanitarian Initiatives Committee Report Fall 2011 Board Meeting Alfredo Herrera, Committee Chair 1. The Humanitarian Initiatives Committee (HIC) in brief The HIC mission is to support humanitarian initiatives, new ventures and collaborations in which Canadian IEEE members are involved; for example: by identifying Canadian humanitarian initiatives already underway, by leveraging external (corporate, community, association) relationships for humanitarian solution partnerships, or by nurturing initiatives that our members raise like relief efforts in disasters like the December ’04 tsunami in southeastern Asia or the January ’10 earthquake in Haiti. One way it believes it can effectively accomplish this is by providing leadership, encouragement, and support to Sections and Chapters interested in humanitarian initiatives. 2. Current status and sleight for 2012 The Committee consist of IEEE Canada members and an expert panel of humanitarian advisors as follows: the HIC Chair; the Past-Chair of the HIC; the Past- President of IEEE Canada; a representative from each Area; the IEEE Canada President (ex-officio); and appointments to the HIC by the IEEE Canada Past-President, appointments include both IEEE volunteers and humanitarian advisors. => Webpage/blog: http://ewh.ieee.org/mu/r7-hic/ => Virtual Community: http://ieeecanadahic.oc.ieee.org/ |Role |2011 |2012 ...
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...Abbreviated version of this report is published as "Trends in Computer Science Research" Apirak Hoonlor, Boleslaw K. Szymanski and M. Zaki, Communications of the ACM, 56(10), Oct. 2013, pp.74-83 An Evolution of Computer Science Research∗ Apirak Hoonlor, Boleslaw K. Szymanski, Mohammed J. Zaki, and James Thompson Abstract Over the past two decades, Computer Science (CS) has continued to grow as a research field. There are several studies that examine trends and emerging topics in CS research or the impact of papers on the field. In contrast, in this article, we take a closer look at the entire CS research in the past two decades by analyzing the data on publications in the ACM Digital Library and IEEE Xplore, and the grants awarded by the National Science Foundation (NSF). We identify trends, bursty topics, and interesting inter-relationships between NSF awards and CS publications, finding, for example, that if an uncommonly high frequency of a specific topic is observed in publications, the funding for this topic is usually increased. We also analyze CS researchers and communities, finding that only a small fraction of authors attribute their work to the same research area for a long period of time, reflecting for instance the emphasis on novelty (use of new keywords) and typical academic research teams (with core faculty and more rapid turnover of students and postdocs). Finally, our work highlights the dynamic research landscape in CS, with its focus constantly ...
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...Institute of Electrical and Electronics Engineers based in New York, New York. With aspirations of solving the world’s most challenging problems and exceeding in engineering excellence, IEEE UCSD hopes to inspire the next generation of engineers in leadership and professional development by means including micromouse competitions and social events (IEEE USCSD, 2014). Joining the team at UCSD has many benefits. Along with meeting people from all around the world there are grants available to the competitors and students such as undergraduate grants, Warren College grants and Jacobs’s school grants. Specific to the team at UCSD, the first ten teams to sign up are eligible for a $250.00 grant (IEEE UCSD, 2014). There are also many funding opportunities from companies, alumni and other private donors. If someone is interested in joining the IEEE organization outside of the UCSD group, they can expect reasonable membership fees of $187.00 per person and only $32.00 per year if they are a student. This allows people to access many more resources such as having their own IEEE account, access to journals and periodicals, funding and discounts through reimbursements from the IEEE organization itself. This particular organization at UCSD was chosen specifically for its association with the IEEE and the benefits that come with it as well as its geographical elation to the Silicon Valley, which has been the birthplace of many technological advances in computers and electronics. Also, since...
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