Digital Commons Network^™

Distributed Power Control For Cellular Networks In The Presence Of Channel Uncertainties, Maciej Jan Zawodniok, Q. Shang, Jagannathan Sarangapani

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, a novel distributed power control (DPC) scheme for cellular network in the presence of radio channel uncertainties such as path loss, shadowing, and Rayleigh fading is presented. Since these uncertainties can attenuate the received signal strength and can cause variations in the received Signal-to-Interference ratio (SIR), a new DPC scheme, which can estimate the slowly varying channel uncertainty, is proposed so that a target SIR at the receiver can be maintained. Further, the standard assumption of a constant interference during a link's power update used in other works in the literature is relaxed. A CDMA-based cellular network …

Dynamic Simulation Of A Mems Cantilever Switch, James W. Fonda, Steve Eugene Watkins

Electrical and Computer Engineering Faculty Research & Creative Works

The dynamic behavior of a micro-electro-mechanicalsystem (MEMS) cantilever switch is investigated. Overactuation of the switch can degrade bounce characteristics and reduce the lifetime of the contacts. This work concerns the development of a control system that limits the number of switch bounces and reduces the impact force on the beam tip. A limited mass-spring analysis of the tip-position is given and an associated control approach is applied. Input limiting, state-feedback, and adaptive control methods are compared. All results demonstrate improved switch bounce characteristics for the simplified beam model with the adaptive showing the best performance improvement. A comprehensive finite element …

Gene Expression Data For Dlbcl Cancer Survival Prediction With A Combination Of Machine Learning Technologies, Rui Xu, Xindi Cai, Donald C. Wunsch

Electrical and Computer Engineering Faculty Research & Creative Works

Gene expression profiles have become an important and promising way for cancer prognosis and treatment. In addition to their application in cancer class prediction and discovery, gene expression data can be used for the prediction of patient survival. Here, we use particle swarm optimization (PSO) to address one of the major challenges in gene expression data analysis, the curse of dimensionality, in order to discriminate high risk patients from low risk patients. A discrete binary version of PSO is used for gene selection and dimensionality reduction, and a probabilistic neural network (PNN) is implemented as the classifier. The experimental results …

Hierarchical Control Scheme For Two Static Compensators In The Brazilian 45-Bus Power System, Salman Mohagheghi, Ganesh K. Venayagamoorthy, Yamille Del Valle, Ronald G. Harley

Electrical and Computer Engineering Faculty Research & Creative Works

No abstract provided.

Intelligent Optimal Control Of Excitation And Turbine Systems In Power Networks, Ganesh K. Venayagamoorthy, Ronald G. Harley

Electrical and Computer Engineering Faculty Research & Creative Works

The increasing complexity of the modern power grid highlights the need for advanced modeling and control techniques for effective control of excitation and turbine systems. The crucial factors affecting the modern power systems today is voltage control and system stabilization during small and large disturbances. Simulation studies and real-time laboratory experimental studies carried out are described and the results show the successful control of the power system excitation and turbine systems with adaptive and optimal neurocontrol approaches. Performances of the neurocontrollers are compared with the conventional PI controllers for damping under different operating conditions for small and large disturbances.

International Working Group On Assurance Cases (For Security), S. Guerra, M. Masera, Ann K. Miller, C. B. Weinstock, R. E. Bloomfield

Electrical and Computer Engineering Faculty Research & Creative Works

Critical systems are aptly named - from electric power to water and gas to the telephone system and the Internet, they're all critical to some aspect of our daily lives. We''re a networked society and as such, it's important to both know whether critical systems are trustworthy and be able to communicate, review, and debate the level of trust achieved in them. In the safety domain, explicit safety cases are increasingly required by law, regulations, and standards. In this article, we outline what a small, international group of experts, spanning various disciplines in safety, security, reliability, and critical infrastructure, been …

Laser Optical In-Circuit Measurement System For Immunity Applications, Chong Ding, David Pommerenke

Electrical and Computer Engineering Faculty Research & Creative Works

During immunity testing (ESD, EFT) of a digital circuit, the waveforms of critical signal nets need to be measured for analyzing the failure mechanism. However, it is difficult to measure the induced voltage in the circuit under test due to the unwanted coupling by the non-ideal shielding of the probe cable, especially, if large common mode currents are present. Fiber optical connection avoids this problem. Semiconductor lasers have frequently been used for converting the voltage into an optical signal. The paper shows novel implementations of powering the laser, leading to a small, low cost optical probe.

Nanoporous Zeolite Thin Film-Based Fiber Intrinsic Fabry-Perot Interferometric Sensor For Detection Of Dissolved Organics In Water, Ning Liu, Juan Hui, Cunqiang Sun, Junhang Dong, Luzheng Zhang, Hai Xiao

Electrical and Computer Engineering Faculty Research & Creative Works

A fiber optic intrinsic Fabry-Perot interferometric (IFPI) chemical sensor was developed by fine-polishing a thin layer of polycrystalline nanoporous MFI zeolite synthesized on the cleaved endface of a single mode fiber. The sensor operated by monitoring the optical thickness changes of the zeolite thin film caused by the adsorption of organic molecules into the zeolite channels. The optical thickness of the zeolite thin film was measured by white light interferometry. Using methanol, 2-propanol, and toluene as the model chemicals, it was demonstrated that the zeolite IPFI sensor could detect dissolved organics in water with high sensitivity.

An Internet-Based Mental Disability Law Program: Implications For Social Change In Nations With Developing Economies, Michael L. Perlin

Fordham International Law Journal

This Article first briefly discusses the use of distance learning in a law school environment, and considers the special implications of distance learning for persons with disabilities. It then explains the structure and rationale of these courses, reports on a course section taught in Nicaragua in the Fall-Winter of 2002, and considers plans to replicate the Nicaraguan experience throughout other nations with developing economies in Africa, Asia, Central America, and Central and Eastern Europe. Finally, this Article assesses the potential impact of such a course on developing-economy nations.

A New Tort Code Emerges In China: An Introduction To The Discussion With A Translation Of Chapter 8- Tort Liability, Of The Official Discussion Draft Of The Proposed Revised Civil Code Of The People's Republic Of China, George W. Conk

Fordham International Law Journal

In 1986, the Sixth National People's Congress enacted the General Principles of Civil Law of the People Republic of China ("1986Code). The 1986 Code is now undergoing comprehensive revision. The Standing Committee of the National Peoples Congress (the national legislature) issued a comprehensive draft revised civil code for discussion on December 17, 2002 "Standing Committee Discussion Draft". Discussion in China of the 2002 Standing Committee Discussion Draft has recently centered on the chapter on property rights. Passed on March 16, 2007, after seven drafts, the property rights chapter has been the source, one can readily understand, of much more controversy …

Efficiency Consideration And Merger Enforcement: Comparison Of U.S. And Eu Approaches, Robert Pitofsky

Fordham International Law Journal

Discussion in this Essay is designed to explore recently introduced efficiency considerations and to compare developing law in the United States and the European Union. The following sections discuss why incorporation of efficiency factors has been controversial, explore efficiency analysis in connection with mergers under U.S. law, explore comparable developments in EU law, and, finally, offer a comparison of developments in the two jurisdictions.

Designing And Modeling Of A New Continuous Steelmaking Process, Jörg Peter

Doctoral Dissertations

"Continuous steel production has the potential to lower the cost of steelmaking as compared to current batch operations. However, experiences from past attempts to develop and commercialize continuous steelmaking processes show that there are several engineering hurdles to overcome. The objective of this research was the development of a fully continuous steelmaking process that would incorporate the lessons from past experiences, address the foreseen challenges, and meet the requirements to justify the possible replacement of the current EAF-LMF steelmaking route.

The design of the new process consists of five interconnected vessels. Preheated scrap would be continuously charged, melted, and superheated …

Interview With Michael Leathes, Nadja Alexander

Research Collection Yong Pung How School Of Law

Alexander: Can you describe your professional role and how it relates to international mediation?Leathes: I have been an in-house counsel for most of my 36-year career, including general counsel of Pfizer International and of International Distillers & Vintners and general manager of BAT’s intellectual propertycompany. In all these roles I have been responsible for litigation portfolios internationally—in total, thousands of cases. Before I figured out a better way, I’m certain that I must have been responsible for about as many losses as wins. Then, in the late 80s, I discovered mediation…A: And what happened?L: Together with the teams of people …

Mediating In The Shadow Of Australian Law: Structural Influences On Adr, Nadja Alexander

Research Collection Yong Pung How School Of Law

Mediation has grown rapidly in many Anglophone jurisdictions such as USA, Australia, Canada, New Zealand and England. The current state of mediation practice in many of these jurisdictions can be traced back to the establishment of community justice centres in the 1970s and 1980s. Mediation is practised in the private sector as well as in a wide range of court-referred programs. In many common law jurisdictions mediation is no longer a form of alternative dispute resolution, it has become primary dispute resolution.

Transparency As An Element Of Good Governance In The Practice Of The Eu And The Wto: Overview And Comparison, Friedl Weiss, Silke Steiner

Fordham International Law Journal

This article seeks to provide a comparative overview of relevant practice of the European Union ("EU") and the World Trade Organization ("WTO") with regard to the interpretation and use made of "good governance," and in particular with regard to "transparency," one of its core component elements.

Labeling Genetically Modified Food: Comparative Law Studies From Consumer's Perspective, Christopher C. H. Chen

Research Collection Yong Pung How School Of Law

This article focus on the genetically modified food and labelling requirement. The relatively new technology raises some concerns over the safety of food containing genetically modified substance. The "substantial equivalent" doctrine, adopted by the U.S., and the "precautionary" doctrine, taken by the EU, represent two contradictory approaches to reconcile new biotechnology and consumer protection, a difference influenced by politics or food industry rather than by consumer attitudes. In this article, we argue that consumers cannot make their own choices and exercise market power without a certain degree of disclosure of information. However, even though food labelling is an effective way …

The Paradox Of Corruption As Antithesis To Economic Development: Does Corruption Undermine Economic Development In Indonesia And China, And Why Are The Experiences Different In Each Country?, Andrew White

Research Collection Yong Pung How School Of Law

The question of whether corruption is antithetical to economic development has been extensively researched and debated since the 1960s. While nearly all participants in the debate appear to agree that corruption ultimately is antithetical to long-term economic development, the extent to which it positively or negatively affects economic development in the short term depends upon highly contextual factors. In different countries and regions of the world, factors of local culture and history, the nature of the state, the type of corruption and actors involved, and the political responses and motivations to curtail corruption all inform the answer to this question. …

Optimal Design Of Svc Damping Controllers With Wide Area Measurements Using Small Population Based Pso, Ganesh K. Venayagamoorthy, Tridib Kumar Das, Sandhya R. Jetti

Electrical and Computer Engineering Faculty Research & Creative Works

Static Var Compensator (SVC) are employed for providing better voltage regulation and transient stability especially for increased power transfer through the transmission lines. In this paper, two SVC damping controllers with single and dual inputs respectively are designed based on wide area measurements of generator speed deviations. A Small Population based Particle Swarm Optimization algorithm (SPPSO) is applied to determine the optimal parameters of the damping controllers for small and large disturbances. Simulation results are provided to show that the effectiveness of the optimal damping controllers on the Kundur''s two-area benchmark power system. Results show the dual input controller further …

Particle Swarm Optimization Based Defensive Islanding Of Large Scale Power System, Wenxin Liu, Ganesh K. Venayagamoorthy, David A. Cartes

Electrical and Computer Engineering Faculty Research & Creative Works

Defensive islanding is an efficient way to avoid catastrophic failures and wide area blackouts. Power system splitting especially for large scale power systems is a combinatorial explosion problem. Thus, it is very difficult to find an optimal solution (if one exists) for large scale power system in real time. This paper proposes to utilize the computational efficiency property of Binary Particle Swarm Optimization (BPSO) to find some efficient splitting solutions in limited timeframe. The solutions are optimized based on a cost function considering the balance between real power generation and consumption, the relative importance of customers, the capacities of distribution …

Real-Time Implementation Of A Statcom On A Wind Farm Equipped With Doubly Fed Induction Generators, Wei Qiao, Ganesh K. Venayagamoorthy, Ronald G. Harley

Electrical and Computer Engineering Faculty Research & Creative Works

Voltage stability is a key issue to achieve the uninterrupted operation of wind farms equipped with doubly fed induction generators (DFIGs) during grid faults. A Static Synchronous Compensator (STATCOM) is applied to a power network which includes a DFIG driven by a wind turbine, for steady state voltage regulation and transient voltage stability support. The control schemes of the DFIG rotor-side converter, grid-side converter and the STATCOM are suitably designed and coordinated. The system is implemented in real-time on a Real-Time Digital Simulator (RTDS®). Results show that the STATCOM improves the transient voltage stability and therefore helps the wind turbine …

Real-Time Implementation Of An Optimal Transient Neurocontroller For A Gcsc, Swakshar Ray, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

This paper presents the design of an optimal Auxiliary Transient Neurocontroller (ATNC) for the Gate Controlled Series Capacitor (GCSC) in a multi-machine power system. GCSC is a recent advancement in the family of series FACTS devices. While GCSC regulates power flow through a transmission line, an auxiliary control signal can provide damping to the power oscillations during disturbances. The ATNC has been designed using heuristic dynamic programming to develop an optimal neurocontroller with fixed weights. The ATNC is implemented in real-time using the TMS3206701 DSP and the Real-Time Digital Simulator (RTDS). Results are presented to show the effectiveness of the …

Robustness And Distance Discrimination Of Adaptive Near Field Beamformers, Y. Rosa Zheng, Peng Xie, Steven L. Grant

Electrical and Computer Engineering Faculty Research & Creative Works

A robust adaptive beamformer is proposed using the near field regionally constrained adaptive approach that designs a set of linear constraints by filtering on a low rank subspace of the near field signal over a spatial region and a wide frequency band. This method can accurately control the beam-former response over the designed spatial-temporal region using a small number of linear constraint vectors and improve the robustness against target location errors. Meanwhile, this method enhances the capability of the near field beamformer in distance discrimination without additional constraints so that interference impinging at the same direction as the desired signal …

Contract Law, Pey Woan Lee, Pearlie Koh, Chee Ho Tham

Research Collection Yong Pung How School Of Law

The issue of contract formation arose in the unusual context of civil procedure in Wellmix Organics (International) Pte Ltd v Lau Yu Man [2006] 2 SLR 117 (see also para 10.60 on “Mistake”). The plaintiff in this case unsuccessfully sought to enforce a consent unless order against the defendant. Andrew Phang Boon Leong J (as he then was) emphasised that, keeping in view its very drastic consequence of depriving a party of his cause of action, such an order will only be established where the terms of the agreement are clear and unambiguous. It was clear on the facts that …

Contract Law, Chee Ho Tham, Pearlie Koh, Pey Woan Lee

Research Collection Yong Pung How School Of Law

The issue of contract formation arose in the unusual context of civil procedure in Wellmix Organics (International) Pte Ltd v Lau Yu Man [2006] 2 SLR 117 (see also para 10.60 on “Mistake”). The plaintiff in this case unsuccessfully sought to enforce a consent unless order against the defendant. Andrew Phang Boon Leong J (as he then was) emphasised that, keeping in view its very drastic consequence of depriving a party of his cause of action, such an order will only be established where the terms of the agreement are clear and unambiguous. It was clear on the facts that …

“Peace Is More Than The End Of Bombing”: The Second Stage Of The Vieques Struggle, Sherrie Baver

Publications and Research

The nature of colonialism in Puerto Rico has caused most political issues to be viewed within the framework of status politics. In the first stage of the struggle to expel the U.S. Navy from the island (1999–2003), civil society in Puerto Rico united when the issues were reframed with links not to status politics but to human rights and social justice. Viequenses symbolized for Puerto Ricans in Puerto Rico, on the mainland, and in the world at large the costs of military colonialism. In the second stage of the struggle, since the military’s departure, Viequenses have struggled to control the …

An Investigation Of The Effect Of Chassis Connections On Radiated Emi From Pcbs, N. Kobayashi, T. Harada, A. Shaik, Todd H. Hubing

Electrical and Computer Engineering Faculty Research & Creative Works

This paper investigates the effect of grounding posts when printed circuit boards are mounted near and parallel to a metal plate or chassis. Specifically, experimental data showing changes in radiated emission levels are explained by means of coupling phenomena between a power bus, a chassis cavity including grounding posts, and a cable connected to the power bus. This coupling is modeled using SPICE and the results are combined with an equivalent magnetic current source model to estimate the radiated emissions from various printed circuit board configurations. the calculated results are shown to be consistent with the corresponding experimental data. © …

Emc Expert Systems For Evaluating Automotive Designs, Todd H. Hubing

Electrical and Computer Engineering Faculty Research & Creative Works

The automobiles of the future are being designed on computers and a significant amount of performance and safety testing is done using computer models. by the time the first hardware prototype is built, many critical design decisions affecting intersystem and intra-system electromagnetic compatibility (EMC) have been made. Therefore, it is becoming increasingly important to perform the first EMC design review well before any hardware is available to test. Automotive EMC expert systems examine the relevant aspects of an automotive design while it is still on the computer to spot design features that are likely to cause EMC problems. © 2006 …

Modeling Radiated Emissions From Cables Attached To Printed Circuit Boards Driven By Power Bus Noise, K. Morishita, N. Kobayashi, T. Harada, H. Ke, Todd H. Hubing

Electrical and Computer Engineering Faculty Research & Creative Works

This paper describes a two-step technique for modeling the radiated electromagnetic emissions from a printed circuit board with attached cables when the source of the emissions is noise between the board's power and ground planes. the first step calculates the electric fields at the edges of the power-ground plane pair. the second step replaces the power plane with equivalent sources embedded within the ground plane structure. Examples are provided that demonstrate the accuracy of this approach. © 2006 IEEE.