基于声信号的扶梯远程监测方法

随着现代化城市建设的进程的快速发展,自动扶梯已经成为一个现代化城市交通不可或缺的设备,近年来自动扶梯数量增加迅猛,为了有效的缓解自动扶梯维保人机不匹配矛盾,保障自动扶梯使用的安全可靠性。文章分析了自动扶梯的失效因素,拟建立自动扶梯的声信号远程监控系统,来帮助业主和维保单位及时了解自动扶梯健康状态,制定维保策略。     

基于动态图像序列的自动扶梯客流量的测量分析

随着社会的不断发展,人们的安全意识也不断提高。在商场、飞机场、火车站、地铁站以及一些大型的娱乐场所中,自动扶梯都是广泛存在着的运输工具。而如果不能对自动扶梯客流量进行良好的控制,就可能会引发一些安全方面的问题。本文阐述了自动扶梯和计算机视觉系统原理,并利用计算机图像序列分析的方法对自动扶梯客流量进行测量分析。     

基于台达VFD-E变频器的新型自动扶梯节能控制系统设计

以台达VFD—E型变频器为例,结合最近实施的GB16899-2011《自动扶梯和自动人行道的制造与安装安全规范》相关扶梯节能的控制要求,介绍了一种颍型自动扶梯变频节能控制系统的设计。结合自动扶梯的基本原理,进行了硬件电路和系统控制程序的设计。     

基于PLC和变频器的自动扶梯节能改造

常规的自动扶梯有无乘客时均以额定速度运行，具有能耗大、机械磨损严重、使用寿命低等缺点。采用PLC与变频控制技术对自动扶梯进行节能改造，对其电气控制系统硬件电路和软件进行设计。改造后的自动扶梯无人乘梯时低速或停止运行，有效地节约了用户的使用成本，具有显著的经济效益和社会效益。     

基于PLC的自动扶梯多功能变频节能控制系统设计

以OMRON CPMIA-20CDR-A-V1型PLO及汇川公司的MD320变频器为例介绍自动扶梯多功能变频节能控制系统的设计。结合自动扶梯的基本原理,进行了配件选择及硬件电路设计,并设计了系统控制程序。     

拉斯维加斯会展中心改善能效

据悉，Kone公司日前顺利完成了拉斯维加斯会展中心自动扶梯系统的节能改造项目，在该项目中，他们为自动扶梯系统安装了由Power Efficiency公司生产的、基于E—Save技术的电机能效控制器（MEC）。     

浅析自动扶梯和自动人行道新版检规对建筑物接口的规定

本文通过详细的分析和介绍,希望能使建筑设计者以及电梯检验人员清楚的认识标准与检规对自动扶梯和自动人行道与建筑物的接口的规定,来相互配合、共同提高自动扶梯和自动人行道运行的安全性。     

红外系统和变频器在自动扶梯中的应用

自动扶梯是一种常用的载人提升设备,广泛用于商场、宾馆、车站、机场、高铁、地铁等场合。它在方便顾客和提高服务质量等方面起到了相当重要的作用,但由于其使用场合的特殊性,运转时间长,空载率高,存在很大的能量浪费。经变频调速改造后,节电效果显著。本文主要讲述自动扶梯节能改造原理,通过红外传感器开关系统和变频器对自动扶梯的控制,达到节能的目的。此应用具有很重要的意义。     

红外系统和台达变频器在自动扶梯中的应用

自动扶梯是一种常用的载人提升设备,广泛用于商场、宾馆、车站、机场、高铁、地铁等场合。它在方便顾客和提高服务质量等方面起到了相当重要的作用,但由于其使用场合的特殊性,运转时间长,空载率高,存在很大的能量浪费。经变频调速改造后,节电效果显著。本文主要讲述自动扶梯节能改造原理,通过红外传感器开关系统和变频器对自动扶梯的控制,达到节能的目的。此应用具有很重要的意义。     

直接对梯级制动的自动扶梯防逆转装置设计

针对现有自动扶梯防逆转装置存在链条脱落导致自动扶梯逆转事故的安全隐患,直接针对人体站立的梯级进行制动,提出了基于电磁铁的挂钩制动和楔形块制动两种设计方案.其中对楔形块制动的设计方案进行详细计算,可针对提升高度为6m(站立梯级共30个)、倾斜角为30°的自动扶梯,在每个梯级上站立2人,每人80kg的情况下,达到较好的制动效果,即减加速度不超过1m/s2,满足设计要求和国家标准.     

我国边缘群体科普公正问题研究

本文分析了我国流动人口、妇女、残疾人、农村人口、贫困人群等科普边缘群体的状况和成因,指出科普边缘群体低层次的科学素养和知识习得状况暴露了严重的科普公正问题,政府和社会在国家科普政策和关注重心、科普资源分配、具体的科普实践和科普实效三方面缺乏或者难以实现科普公正,最后提出了4条实现科普公正的建议。     

The internationalization of engineering education: a tale of two countries

Two international exchange programs in engineering between universities in Japan and Canada, are described in order to explain the significant benefits gained by the undergraduate and graduate students, as well as the academic staff who participate, and to highlight key principles generally followed in the design and execution of exchange programs. One notable and successful engineering exchange program is between the University of Waterloo, located in Southern Ontario, Canada, and Tottori University in Japan, while the other is between the University of Waterloo and Kyoto University in Japan. Both of these programs include foreign students taking courses for credit or audit at the host university, and, for the case of graduate students, also receiving guidance in their research. Moreover, upon completion of one academic semester in Japan, all of the undergraduate Waterloo students studying at Tottori University are employed in Japanese industry for three to four months before returning to Canada. Of paramount importance to the education of the participating undergraduate and graduate students is the opportunity to learn, by first-hand experience, the language and culture of a foreign country. In fact, one of the key findings of a survey completed by Canadian and Japanese students who took part in the exchange programs, is that living in a different culture greatly enhanced their own personal development. The addition of this international perspective to a solid education in engineering opens many doors of opportunity for exchange program alumni, who are well prepared to fully participate in the global marketplace of the 21st century, and to assist society in responsibly reaching an equitable and sustainable future.     

Channel Estimation by Using Short Training Sequences in CDMA Systems

Multiuser detection techniques are known to be effective to counter the presence of multiuser interference in code division multiple access channels. Multiuser detectors can provide excellent performance only when the channel impulse responses of all the users are precisely known. Hence, channel estimation becomes a challenging issue in mobile communication systems. In this paper, we address the problem of efficient maximum likelihood mobile radio channel estimation at high channel efficiency that requires a short training sequence along with the known spreading sequence. The proposed system can be employed in both the uplink and downlink of a heavily loaded multiuser CDMA system. The extension of the approach with unknown users' delays are also proposed. We present results that show the success of this method in recovering the transmitted bits with a relatively small number of preamble bits. Ahmet Rizaner was born in Larnaca, Cyprus, on January 31, 1974. He received the B.S. and M.S. degrees in Electrical and Electronics Engineering from the Eastern Mediterranean University, Famagusta, North Cyprus, in 1996 and 1998, respectively. He completed his PhD. degree in Electrical and Electronic Engineering in Eastern Mediterranean University and joined Eastern Mediterranean University as a lecturer in 2004. He is lecturing in the School of Computing and Technology. His main research interests include CDMA communications, adaptive channel estimation, and multiuser detection techniques. Hasan Amca was born in 1961 in Nicosia-Cyprus. He graduated from the Higher Technological Institute in Magosa-Cyprus (which is renamed later as Eastern Mediterranean University). He joined EMU in 1985 after receiving a M.Sc. (Digital Signal Processing) degree from the University of Essex in England (1985). He took his Ph.D. (Mobile Communications) from the University of Bradford where he was on a Commonwealth scholarship. He has been teaching in the Electrical and Electronic Engineering Department of Eastern Mediterranean University since 1993 where he also served as the vice chairman from Spring 1998 to Spring 2000. He has been appointed as the Director of the School of Computing and Technology of the EMU since Spring 2000. His research interests include Multi User Detection of CDMA signals, Adaptive Equalisation, Multi Carrier Systems, Mobile Radio Systems and Networks, Internet and Information Technology Applications in Education. Kadri Hacıoğlu was born in Nicosia, Cyprus. He received the B.Sc., M.Sc., and Ph.D. degrees in electrical and electronic engineering from the Middle East Technical University, Ankara, Turkey, in 1980, 1984, and 1990, respectively. After his two-year military service, in 1992, he joined the faculty of Eastern Mediterranean University, Magosa, North Cyprus, as an Assistant Professor, and became an Associate Professor in 1997. While there, he taught several classes on electronics, digital communications, speech processing and neural networks. During this time, he conducted research on applying fuzzy logic, neural networks, and genetic algorithms to signal processing and communications problems. From 1998 to 2000, he was a Visiting Professor in the Department of Computer Science, University of Colorado, Boulder. Here, he taught classes on neural networks and continued his research. Since 2000, he has been a Research Associate at the Center for Spoken Language Research, University of Colorado. He has authored or coauthored numerous papers and supervised a dozen M.Sc./Ph.D. theses. His current research interests are concept-based language modeling, speech understanding, natural language generation, and search methods in speech recognition/understanding. He also does research on multiuser detection and equalization in CDMA systems. Ali Hakan Ulusoy was born in Eskişehir, Turkey, on June 3, 1974. He graduated from the double major program of the department of Electrical and Electronic Engineering and department of Physics in Eastern Mediterranean University as the first rank student of Faculty of Engineering in 1996. He received his M.S. degree in Electrical and Electronic Engineering in Eastern Mediterranean University in 1998. He completed his PhD. degree in Electrical and Electronic Engineering in Eastern Mediterranean University and joined Eastern Mediterranean University as a lecturer in 2004. He is lecturing in the School of Computing and Technology. His current research interests include receiver design, multi-user detection techniques, blind and trained channel estimation in Code Division Multiple Access (CDMA).     

Thyristor Input-Protection Device Suitable for CMOS RF IC’s

Based on simulation results and accompanying analysis, we suggest a thyristor-type ESD protection device structure suitable for implementation in standard CMOS processes to reduce the parasitic capacitances added to the input nodes, which is very important in CMOS RF ICs. We compare DC breakdown characteristics of the suggested device to those of a conventional NMOS protection device to show the benefits of using the suggested device for ESD protection. The characteristic improvements are demonstrated and the corresponding mechanisms are explained based on simulations. Structure dependencies are also examined to define the optimal structure. AC simulation results are introduced to estimate the magnitude of reduction in the added parasitic capacitance when using the suggested device for ESD protection. The analysis shows a possibility of reducing the added parasitic capacitance down to about 1/45 of that resulting with a conventional NMOS protection transistor, while maintaining robustness against ESD.Jin-Young Choi was born in Seoul, Korea in 1956. He received the B.S. degree in electrical engineering from the Seoul National University, Korea, in 1979, and the M.S. and Ph.D. degrees in electrical engineering from the University of Florida, USA, in 1986 and 1991, respectively. In 1991, he joined Samsung Electronics Memory Division, Korea, where he was engaged in high-speed SRAM development. In 1992, he moved to the Hongik University, Jochiwon, Korea, where he is now an associate professor. His recent research interests include the high-frequency modeling of CMOS devices, CMOS RF circuit design, and analysis & design for ESD protection.Woo Suk Yang was born in Seoul, Korea in 1957. He received the B.S. degree in electrical engineering from the Seoul National University, Korea, in 1979, and the Ph.D. degree in electrical and computer engineering from the North Calorina State University, USA, in 1990. His doctorial research was in the area of signal processing. In 1990, he joined LG Electronics Co. Korea. In 1991, he moved to the Hongik University, Jochiwon, Korea, where he is now a professor. His recent research interests include the high-frequency modeling and various topics in signal processing area.Dongmin Kim was born in Korea in 1956. He received the B.S. and M.S. degrees in electrical engineering from the Seoul National University, Korea, in 1979 and 1984, respectively and the Ph.D. degree in ECE from the University of Michigan, USA, in 1996. Now, he is an assistant professor of the Hongik University, Jochiwon, Korea. His recent research interests include circuit design and analysis.Youngju Kim was born in Seoul, Korea in 1957. He received the B.S. and M.S. degrees in electrical engineering from the Seoul National University, Korea in 1980 and 1985, respectively and the Ph.D. degree in electrical engineering from the Polytechnic University of New York, USA, in 1995, respectively. In 1996, he joined the Hongik University, Jochiwon, Korea, where he is now an assistance professor. His recent research interests include the RF circuit design and LIN wireless systems.     

木薯块根膨大初期淀粉体形态及发育的扫描电镜观察

对华南木薯3个品种（SC124、SC8、Arg7）膨大初期的木薯块根淀粉体的大小、形态、分布排列和发育等特性进行了扫描电镜观察。结果表明：淀粉主要沉积在木薯块根的次生韧皮部和木质部的薄壁细胞中。木薯块根淀粉体形态品种间没有明显差异,主要为球形,常见有椭球体、不规则的半球体、多极球体等形态,但淀粉体大小及空间排列在3个品种间差异显著。SC124淀粉体平均直径最小,淀粉体的变异系数大,淀粉体间空隙较大,呈层状排布;SC8淀粉体大小较为一致,变异系数小,淀粉体排列紧密,呈束状排布;Arg7淀粉体大小及变异系数都较小,淀粉体排列较为疏松,成团状排布。结论：淀粉体的大小、形态、空间排列及增殖方式可能是影响木薯块根淀粉充实程度和品质特性直接原因。     

Noise in solid-state devices and lasers

A survey is given of the most important noise problems in solid-state devices. Section II discusses shot noise in metal-semiconductor diodes, p-n junctions, and transistors at low injection; noise due to recombination and generation in the junction space-charge region; high-level injection effects; noise in photodiodes, avalanche diodes, and diode particle detectors, and shot noise in the leakage currents in field-effect transistors (FETs). Section III discusses thermal noise and induced gate noise in FETs; generation-recombination noise in FETs and transistors at low temperatures; noise due to recombination centers in the space-charge region(s) of FETs, and noise in space-charge-limited solid-state diodes. Section IV attempts to give a unified account of 1/f noise in solid-state devices in terms of the fluctuating occupancy of traps in the surface oxide; discusses the kinetics of these traps; applies this to flicker noise in junction diodes, transistors, and FETs, and briefly discusses flicker noise in Gunn diodes and burst noise in junction diodes and transistors. Section V discusses shot noise in the light emission of luminescent diodes and lasers, and noise in optical heterodyning. Section VI discusses circuit applications. It deals with the noise figure of negative conductance amplifiers (tunnel diodes and parametric amplifiers), and of FET, transistor, and mixer circuits. In the latter discussion capacitive up-converters, and diode, FET, and transistor mixers are dealt with.     

Theory and application of wave propagation and scattering in random media

This paper presents a review of basic theories and recent advances in the studies of wave propagation and scattering in random media. Examples of the random media include the atmosphere, the ocean, and biological media whose characteristics are randomly varying in time and space. The study of electromagnetic, optical, and acoustic waves in such media has become increasingly important in recent years in the areas of communication, detection, and remote-sensing. Topics covered in this paper are divided into "waves in randomly distributed scatterers," "waves in random continua," and "remote-sensing of random media." Transport theory with various approximate solutions and multiple scattering theories are discussed and their relationships are clarified. Included in the analyses are propagation characteristics of intensities, wave fluctuations, pulse propagation and scattering, coherence bandwidth, and coherence time of communication channels through random media. Remote-sensing techniques include recent advances in the use of inversion techniques to deal with ill-posed problems.     

A Radio Resource Allocation Scheme for Fixed Broadband Wireless Access Systems with Avoidance of Major Interferers

An improved radio resource allocation scheme with avoidance of major interferers is proposed and analyzed for the downlink of Fixed Broadband Wireless Access (FBWA) systems with full frequency reuse. The scheme is based on Enhanced Staggered Resource Allocation (ESRA) and permits the enhancement of the throughput per sector. Simulation results show a maximum downlink throughput per sector in excess of 44% and an increase of 10% with respect to ESRA is achieved, with Base Station (BS) selection procedure, while meeting a 15 dB signal-to-interference ratio (SIR). Nicholas Vaiopoulos was bornin Lamia in 1977. He received his Physics degree and his M.Sc.degree in electronics and radio-communications from the University of Athens, Greecein 2000and 2003, respectively. Currently, he is working towards his Ph.D. degree on the resource allocation techniques with reference to wireless systems at the Department of informatics and Telecommunications at the same University. His research interests include broadband communications systems, scheduling algorithms and power control techniques for wireless systems. Alexander Vavoulaswas born in Athens in 1976. He received his B.Sc. degree in physics and the M.Sc. degree in electronics and radio-communications in 2000 and 2002 respectively,both from the University of Athens, Greece. Currently he is working toward the Ph.D. degree on the radio resource allocation techniques with the same University. His research interest is focused on broadband wireless access and interference management. He is a student nmember of the IEEE. Dimitris Varoutas holds BSc. degree in Physics, M.Sc. in electronics and radio-communi cations and Ph.D. in telecommunications systems and technoeconomics, all from the University of Athens. He is a lecturer in the Department of Informatics and Telecommunications of University of Athens and an adjunct assistant professor in the Department of Telecommunications of the newly founded University of Peloponnese. He has participating in numerous European R&D projects in the RACE I &II, ACTS, Telematics, RISI and IST framework in the areas of telecommunications and Technoeconomics. He is an adviser in several organisations including OTE and EETT (Greek NRA for telecommunications) in the fields of telecommunications, broadband and mobile services, licensing, spectrum management, pricing and legislation. His research interests are optical, microwave communications and technoeconomic evaluation of network architectures and services. He has more than 30 publications in refereed journal and conferences in the area of telecommunications, optoelectronics and technoeconomics. He is a member of IEEE and serves as reviewer in several journals and conferences. Thomas Sphicopoulos received the Physics degree from Athens University in 1976, the D.E.A. degree and Doctorate in Electronics both from the University of Paris VI in 1977 and 1980 respectively, the Doctorat Es Science from the Ecole Polytechnique Federale de Lausanne in 1986. From 1976 to 1977 he worked in Thomson CSF Central Research Laboratories on Microwave Oscillators. From 1977 to 1980 he was an Associate Researcher in Thomson CSF Aeronautics Infrastructure Division. In 1980 he joined the Electromagnetism Laboratory of the Ecole Polytechnique Federal de Lausanne where he carried out research on Applied Electromagnetism. Since 1987 he is with the Athens University engaged in research on Broadband Communications Systems. In 1990 he was elected as an Assistant Professor of Communications in the Department of Informatics & Telecommunications, in 1993 as Associate Professor and since 1998 he is a Professor in the same Department. His main scientific interests are Microwave and Optical Communication Systems and Networks and Techno-economics. He has lead about 40 National and European R&D projects. He has more than 100 publications in scientific journals and conference proceedings. From 1999 he is advisor in several organisations including EETT (Greek NRA for telecommunications) in the fields of market liberalisation, spectrum management techniques and technology convergence.     

An Efficient Adaptive Grouping for Single Code Assignment in WCDMA Mobile Networks

For achieving high utilization and efficient code management of the OVSF code tree in 3G WCDMA networks, several researches have extensively studied. Based on combining both the code assignment and the reassignment mechanisms, it increases obviously high utilization and reduces completely the code blocking. Nevertheless, the required rate of traffic should be powers of two of the basic rate, i.e. 1R, 2R, 4R, …, etc., which is impractical and results in wasting the system bandwidth while the required rate is not powers of two of the basic rate. Several multi-code assignment mechanisms have proposed to reduce the waste rate. Nevertheless, these methods bring two inevitable drawbacks including, high complexity of handling multiple codes, and increasing the cost of using more rake combiners at both the base stations and mobile nodes. Therefore, we propose an adaptive grouping code assignment herein to provide a single channelization code for any possible rate of traffic, even though the required rate is not powers of two of the basic rate. Based on the dynamic programming algorithm, the adaptive grouping approach forms several calls into a group. Then it allocates a subtree to the group and adaptively shares the subtree codes for these calls in the concept of time-sharing of slots during a group cycle time. Therefore, the waste rate and code blocking are thus reduced obviously while using a single rake combiner. Since the delay problem may be occurred in such a time-sharing approach, we propose two schemes of cycle interleaving methods to reduce delay. Numerical results indicate that the proposed adaptive grouping approach reduces significantly the waste rate and thus increases the system utilization. Moreover, the proposed cycle interleaving scheme reduces data delay significantly. Ren-Hung Hwang received his M.S. and Ph.D. degrees in computer science from University of Massachusetts, Amherst, Massachusetts, USA, in 1989 and 1993, respectively. He joined the Department of Computer Science and Information Engineering, National Chung Cheng University, Chia-Yi, Taiwan, in 1993, where he is now a full Professor and the Chair of the Department of Communication Engineering. His research interests include Internet QoS, peer-to-peer infrastructure design, and 3G QoS. Ben-Jye Chang received his M.S. degree in computer engineering from University of Massachusetts, Lowell, in 1991 and the Ph.D. degree in computer science and information engineering from National Chung-Cheng University, Taiwan, in 2001. He joined the Department of Computer Science and Information Engineering faculty at Chaoyang University of Technology, Taiwan, in 2002, where he is currently an Associate Professor. His research interests include QoS-based networks, QoS wirless networking, resource management for wireless networks and mobile cellular networks, and performance evaluation of networks. Min-Xiou Chen received the BS degree in computer science and information engineering from Tung Hai University, Tai-Chung, Taiwan, in 1996, and the MS and PhD degrees in computer science and information engineering from National Chung Cheng University, Chia-Yi, Taiwan, in 1998 and 2005, respectively. He is now an assistant professor at the Department of Computer Science and Information Engineering, Chung Hua University, Hsin-Chu, Taiwan. His research interests include wireless communication, SIP, sensor network and resource management in WCDMA systems. He is a member of the IEEE. Kun-Chan Tsai received the BS degree in information engineering and computer science from Feng Chia University, Taichung, Taiwan, in 2001, and the MS degree in computer science and information engineering from National Chung Cheng University, Chia-Yi, Taiwan, in 2003. His research interests include wireless communications and resource management in WCDMA systems.     

Congestion due to Rate Variations in cdma2000 Data Networks

In order to support high data rate requirements and effectively manage the scarce wireless resources, additional bandwidth channels are allocated and taken away from mobile stations in 3G wireless data networks quite frequently. A TCP sender connected to the mobile, on seeing ACKs coming at a faster pace after additional bandwidth allocation, turns overtly optimistic and injects data into the network at a rate that might be excessive for an intermediate router, thereby leading to loss of multiple packets and subsequent prolonged recovery and periods of underutilization. In this work, we characterize this problem using an analytical model for losses based on continuous flow approximation as well as an extensive simulation setup. We also illustrate how bandwidth oscillations create more severe congestion than an increase in number of users to the extent that even RED algorithm is unable to check the sharp growth of queues. As a result, multiple packets are lost in a droptail fashion. We further demonstrate the dependence of congestion due to bandwidth allocation on the time during which mobiles' rates are increased and observe the degradation in performance for typical load scenarios. We also try to identify the boundary for stable operation of RED and finally present some possible methods for improving the performance. Vikas Paliwal graduated with a Bachelor of Technology degree in Electrical Engineering from IIT (Indian Institute of Technology), Kanpur, India and an M.S. in Systems and Computer Engineering from Carleton University, Ottawa, Canada. He has five years of research and work experience in telecommunications area in a variety of work environments across the globe. During his under-graduation he worked on a research project in micro-electronics area with IMS Research Labs, Hanover, Germany, and developed some innovative algorithms for circuit schematics and layouts. After graduating from IIT, Vikas was the core Engineering and Marketing Consultant for GMG Telecom Consultants India Limited, New Delhi, India, and helped GMG in developing a level of technical expertise in the areas of security systems that resulted in key research projects from firms such as ADT and Honeywell. Later, as part of his Masters research at Carleton University, Ottawa, Canada, Vikas worked on performance analysis of CDMA data networks and queue management techniques that resulted in five research papers in various academic journals/conferences. His Masters research project also attracted the interest of Nortel Networks, Ottawa, Canada, and helped in starting joint research projects in the area of wireless systems simulation, which was of particular interest to Nortel. Vikas then worked with Solana Networks, Ottawa, on network topology detection and on products that improve the performance of mission-critical IP networks and wireless LANs. This was followed by a year of work with Qualcomm, UK, on modem software design and implementation for Qualcomm's 3G chipsets. Currently he works with Qualcomm Inc., San Diego, CA, on physical layer of WCDMA and HSxPA systems. At Qualcomm, he continues his research activities in advanced wireless systems design and implementation by actively participating in various technical forums and conducting several training/discussion sessions on UMTS systems. Ioannis Lambadaris was born in Thessaloniki, Greece. He received a diploma in Electrical Engineering from the Polytechnic School of the Aristotle University of Thessaloniki in 1984. He was a recipient at a Fulbright Fellowship (1984–1985) for graduate studies in USA. He received a M.Sc. degree in Engineering from Brown University, Providence, RI, USA in 1985 and a Ph.D. degree in Electrical Engineering from the University of Maryland, College Park, MD, USA in 1991. He was employed as a research associate at Concordia University, Montreal, Quebec, Canada, in 1991–1992. Between September 1992 and July 1997 he has been an Assistant Professor in the Department of Systems and Computer Engineering at Carleton University, Ottawa, Ontario, Canada. Currently he is an associate professor in the same department and a member of IEEE. While at Carleton he received the Premier %92\,s Research Excellence Award (2000), and the Carleton University Research Excellence Award (2000–2001) for his research achievements in the area of modeling and performance analysis of computer networks. Professor Lambadaris' interests lie in the area of applied stochastic processes, stochastic control, queuing theory and their application for modeling and performance analysis of computer communication networks. His current research concentrates on quality of service (QoS) control for IP networks, resource allocation in optical networks, and optimal routing and flow control in ad-hoc wireless systems. Biswajit, a co-founder of Solana Networks, has15 years of experience in the area of data communication. He has worked at Nortel Networks, Bell Northern Research, Tropic Networks and Belair Networks. The primary focus of his work has been in the area of IP networking protocols and architecture. As an Independent Contributor at Nortel Networks, he spearheaded various advance technology programs and R&D projects in IP networking. He worked as a Network Architect with the MPLS team and as a member of the architecture team at Tropic Networks to address complex optical networking issues. He worked as a System Architect on WLAN mesh networking products at BelAir Networks. Dr. Nandy has a PhD in Electrical and Computer Engineering from the University of Waterloo and has been an Adjunct Research Professor with Systems and Computer Engineering at Carleton University since 2001. He holds an M.Tech in Electrical Engineering from Indian Institute of Technology, Kanpur and a B.E. in Electronics and Telecommunication Engineering from Jadavpur University, Calcutta. He has authored and presented over 25 research papers in International conferences and holds 12 US patents. He has actively participated in various Work Groups in IETF and author of several IETF proposals in the form of Internet Drafts and RFC.