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2009

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Model-To-Hardware Correlation Of Disk Resonators For Via-Array Modeling In High-Speed Pcbs, Arun Reddy Chada, Young H. Kwark, Xiaoxiong Gu, Jun Fan Dec 2009

Model-To-Hardware Correlation Of Disk Resonators For Via-Array Modeling In High-Speed Pcbs, Arun Reddy Chada, Young H. Kwark, Xiaoxiong Gu, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

In high-speed printed circuit board (PCB) designs, vias play a critical role in determining signal and power integrity. This paper uses disk resonators to investigate modeling approaches for common via array structures. Boundary integral equation (BIE) and effective dielectric medium approaches are used for a perforated disk resonator with non-plated holes, using dielectric properties derived from a solid disk resonator study. Both approaches are compared and validated with measurements. ©2009 IEEE.

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Test Bed Evaluation Of Future Power Distribution Systems With Renewable Resources, Bharadwaj R. Sathyanarayana, Gerald T. Heydt, Mariesa Crow, Fanjun Meng Dec 2009

Test Bed Evaluation Of Future Power Distribution Systems With Renewable Resources, Bharadwaj R. Sathyanarayana, Gerald T. Heydt, Mariesa Crow, Fanjun Meng

Electrical and Computer Engineering Faculty Research & Creative Works

Recently, the National Science Foundation (NSF) has inaugurated an Engineering Research Center dedicated to Future Renewable Electric Energy Distribution Management (FREEDM). the premise of the center is to enable the utilization of renewable resources in power distribution systems through the utilization of solid-state controllers and direct digital control. the center is at an initial stage and the focus of some effort is on the development of a test bed that will allow the evaluation of alternative system configurations, controls, solid state controllers, and operations strategies. This paper describes some of those considerations and the requirements for a test bed for …

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Effect Of The Internet On Reading Fiction Books For Enjoyment And Potential Interest In The Integration Of The Two Media, Jessica S. Cole Dec 2009

Effect Of The Internet On Reading Fiction Books For Enjoyment And Potential Interest In The Integration Of The Two Media, Jessica S. Cole

Theses

As the Internet grows in popularity, interest in the potential harmful effects that it will have on other media increases. The current study assesses the impact that the Internet has had on the leisure reading of fiction books and attempts to determine whether integrating Internet features with fiction books increases the appeal of reading them. An online survey was completed by 162 college students, which measured reading rates, Internet use, preferred Internet and book features, as well as interest in reading books that integrate Internet features. Findings show no indication that the Internet has affected leisure reading rates, that the …

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Realization Of Cofeb|Mgo|Cofeb Magnetic Tunnel Junction Devices Through Materials Analysis, Process Integration And Circuit Simulation, Sankha S. Mukherjee Dec 2009

Realization Of Cofeb|Mgo|Cofeb Magnetic Tunnel Junction Devices Through Materials Analysis, Process Integration And Circuit Simulation, Sankha S. Mukherjee

Theses

Spin based magnetic tunnel junctions (MTJs) consist of two ferromagnetic thin films separated by a nonmagnetic insulating barrier. The MTJ exhibits two switchable resistive states, making them ideal candidates for non-volatile memory. The discovery of high Tunneling Magnetoresistance (TMR) in MgO based MTJs has brought spintronics into the forefronts of modern technology. A device structure CoFeB|MgO|CoFeB achieved by physical vapor deposition (PVD) has revolutionized the hard-drive industry to go beyond densities of gigabyte per square inch. There is increasing interest in the application of these devices toward other technical areas, such as sensors, logic and reconfigurable computing. In these structures, …

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Increasing Performance Of Blowfish Encryption Using Cuda., Joseph Anthony Feist Dec 2009

Increasing Performance Of Blowfish Encryption Using Cuda., Joseph Anthony Feist

Electronic Theses and Dissertations

This thesis describes a method of gaining better performance from the Blowfish cryptographic algorithm using GPU acceleration via CUDA (Compute Unified Device Architecture). It is an attempt to resolve the issue of the cryptographic process taking up time and resources. Reducing or eliminating one or both of these issues would perhaps lead to more widespread use of algorithms such as Blowfish to secure individuals’ data by making cryptographic security less costly in terms of time and resources. It is further noted that this method or similar could be used in the case of other algorithms especially those closely related to …

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The Ranking Of Football Teams Using Concepts From The Analytic Hierarchy Process., Yepeng Sun 1976- Dec 2009

The Ranking Of Football Teams Using Concepts From The Analytic Hierarchy Process., Yepeng Sun 1976-

Electronic Theses and Dissertations

A new method to rank football teams with the concepts associated with the Analytic Hierarchy Process(AHP) and Graph theory is developed in this thesis. A set of games is interpreted as a graph, in which every vertex represents a team, and every edge represents a team quality comparison evaluated directly from the score difference of a game. A weighted quality comparison value between every two teams is computed from the graph, based on the transitivity relationship of comparison values in the Analytic Hierarchy Process (AHP). All the quality comparison values are input into the software package Expert Choice as the …

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Vhf-Uhf Passive Filter Synthesis Based On Acoustic Resonator Structures, Melissa Sefton Dempsey Dec 2009

Vhf-Uhf Passive Filter Synthesis Based On Acoustic Resonator Structures, Melissa Sefton Dempsey

Theses

This thesis presents a novel design method for approximating standard bandpass filter transfer functions using surface acoustic wave (SAW) technology. This method is based on standard circuit simulation and optimization tools to generate physical specifications for the fabrication of a SAW impedance element filter (IEF) network. The IEF topology is verified in the design of a narrowband bandpass filter composed of commercial quartz SAW resonators. The utility of the design method is further demonstrated for a wider bandwidth filter based on custom resonators fabricated on a lithium niobate substrate. An optimum fit was obtained between the standard filter target response …

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Electro-Osmotic Actuation For Micropump Applications, Sean O'Brien Dec 2009

Electro-Osmotic Actuation For Micropump Applications, Sean O'Brien

Theses

An electro-osmotic actuation mechanism is explored for micropump applications where self contained, low power, miniaturized pumps are necessary. The principle of electro-osmosis through a cation selective membrane is used to develop a differential pressure which is used to deflect a pump membrane. In an electro-osmotic cell, there are electrolyte filled chambers on either side of an ion specific membrane. Hydrated cations migrate in an applied electric field, effectively pulling water molecules to the cathodic chamber. In such a setup, the polarity of the current can be periodically reversed causing the chambers to alternately fill and discharge. Since the chemical reactions …

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Favecity: A Visual Exploration Of City Travel Information, Ching-Ping Chen Dec 2009

Favecity: A Visual Exploration Of City Travel Information, Ching-Ping Chen

Theses

Web 2.0 provides a great environment for interactive information sharing and collaboration. We are no longer to receive information passively. On the contrary, everyone can contribute content and share personal experiences. It is a perfect social media for travelers to be connected. faveCITY is a visual exploration of what do people think and how do they feel about their favorite cities. It collects users' opinions about the city such as city emotion, favorite city feature, best season to visit and a souvenir recommendation. The goal of this project is to combine Web 2.0 features with information visualization to create an …

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A Frequency Domain Doubletalk Detector Based On Cross-Correlation And Extension To Multi-Channel Case, Mohammad Asif Iqbal, Steven L. Grant, Jack W. Stokes Dec 2009

A Frequency Domain Doubletalk Detector Based On Cross-Correlation And Extension To Multi-Channel Case, Mohammad Asif Iqbal, Steven L. Grant, Jack W. Stokes

Electrical and Computer Engineering Faculty Research & Creative Works

Most teleconferencing conversations are conducted in the presence of Acoustic echoes. Typically, an adaptive filter is used to cancel the echo, with a control device called the doubletalk detector which controls the adaptation. We derive a novel test statistic for the doubletalk detection based on the cross-correlation between the microphone signal and the cancellation error for the frequency domain adaptive algorithm. the main advantage of the proposed algorithm is its simplicity and computational efficiency. We compare our results with the normalized cross-correlation based doubletalk detector proposed in [2]. We also generalize the idea of the proposed doubletalk detector (single channel) …

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Bio-Inspired Node Localization In Wireless Sensor Networks, Raghavendra V. Kulkarni, Ganesh K. Venayagamoorthy, Maggie X. Cheng Dec 2009

Bio-Inspired Node Localization In Wireless Sensor Networks, Raghavendra V. Kulkarni, Ganesh K. Venayagamoorthy, Maggie X. Cheng

Electrical and Computer Engineering Faculty Research & Creative Works

Many applications of wireless sensor networks (WSNs) require location information of the randomly deployed nodes. a common solution to the localization problem is to deploy a few special beacon nodes having location awareness, which help the ordinary nodes to localize. in this approach, non-beacon nodes estimate their locations using noisy distance measurements from three or more non-collinear beacons they can receive signals from. in this paper, the ranging-Based localization task is formulated as a multidimensional optimization problem, and addressed using bio-inspired algorithms, exploiting their quick convergence to quality solutions. an investigation on distributed iterative localization is presented in this paper. …

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Closed-Form Expression Of Self/Mutual Power-Bus Impedances In A Finite Circular Plate Pair, Yao Jiang Zhang, Er Ping Li, Jun Fan Dec 2009

Closed-Form Expression Of Self/Mutual Power-Bus Impedances In A Finite Circular Plate Pair, Yao Jiang Zhang, Er Ping Li, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

The drawbacks of conventional power-bus impedance, defined as an average Green's function integration over port areas, are discussed. a new definition is proposed in terms of cylindrical waves. the equivalence of the new definition and the conventional one is proved in the case of electrically small ports. Addition theorems of cylindrical waves are used to derive an analytical expression of power-bus impedance between ports in a circular plate pair with perfectly electric/magnetic conductor (PEC/PMC) boundaries as well as non-reflective perfectly matched layer (PML) for infinite plate pair. Numerical method has been used to validate the analytical expression derived.

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Investigation Of Crosstalk Among Vias, Songping Wu, Jun Fan Dec 2009

Investigation Of Crosstalk Among Vias, Songping Wu, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

Crosstalk among vias is a critical problem in highspeed digital circuits, deteriorating signal quality and increasing jitter, especially when circuit density is high. Underlying mechanism of crosstalk among vias is investigated in this paper. using a physics-Based equivalent circuit model, crosstalk as a function of various geometrical parameters, including parallel plane pair thickness, layer count in printed circuit board (PCB) stack up, ground via patterns, and parallel plane pair dimensions, has been investigated. a multi-step crosstalk evaluation procedure is proposed based on the study for PCB layout-design verifications. © 2009 IEEE.

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Guardrail Location Rating System Users Manual, Charlie Sun, Tony L. Beckham, Tommy C. Hopkins, Jerry G. Pigman, Eric R. Green, Kenneth R. Agent Dec 2009

Guardrail Location Rating System Users Manual, Charlie Sun, Tony L. Beckham, Tommy C. Hopkins, Jerry G. Pigman, Eric R. Green, Kenneth R. Agent

Kentucky Transportation Center Research Report

The Kentucky Transportation Cabinet’s Division of Maintenance is responsible for identifying and prioritizing locations in need of guardrail. A procedure used by the Kentucky Transportation Cabinet was originally developed by the Kentucky Transportation Center in 1989 and updated in 2002. Based on frequent usage by the Kentucky Transportation Cabinet of the guardrail location rating system database, the need was identified to update the existing database and incorporate improved reporting capabilities. The objectives of the research study, as documented herein, were to update and improve the processes for identification of roadway locations that should be considered for installation of guardrail. Primary …

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Ultrasonic Pulse Velocity Tests On Compacted Soil, David M. Weidinger, Louis Ge, Richard Wesley Stephenson Dec 2009

Ultrasonic Pulse Velocity Tests On Compacted Soil, David M. Weidinger, Louis Ge, Richard Wesley Stephenson

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In This Paper, Results of a Series of Ultrasonic Pulse Velocity Tests on Compacted Soil Were Presented and Discussed. Ultrasonic Pulse Velocity Tests Provide Compression and Shear Wave Velocity Information that Can Be Used in Calculating Dynamic Elastic Moduli Such as Young's Modulus and Shear Modulus. from the Test Results, Calculated Poisson's Ratio Shows a Linear Relation with the Water Content in Compacted Soil, Which Leads to a Linear Trend in Both P and S Wave Velocity Against Water Content. Furthermore, Presenting Plots in Bulk Density Versus Wave Velocity Gives a Clearer Trend Than Dry Density Versus Wave Velocity. © …

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Optimal Trajectory Generation With Dmoc Versus Ntg : Application To An Underwater Glider And A Jpl Aerobot., Weizhong Zhang Dec 2009

Optimal Trajectory Generation With Dmoc Versus Ntg : Application To An Underwater Glider And A Jpl Aerobot., Weizhong Zhang

Electronic Theses and Dissertations

Optimal trajectory generation is an essential part for robotic explorers to execute the total exploration of deep oceans or outer space planets while curiosity of human and technology advancements of society both require robots to search for unknown territories efficiently and safely. As one of state-of-the-art optimal trajectory generation methodologies, Nonlinear Trajectory Generation (NTG) combines with B-spline, nonlinear programming, differential flatness technique to generate optimal trajectories for modelled mechanical systems. While Discrete Mechanics and Optimal Control (DMOC) is a newly proposed optimal control method for mechanical systems, it is based on direct discretization of Lagrange-d'Alembert principle. In this dissertation, NTG …

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Structured P2p Technologies For Distributed Command And Control, Daniel R. Karrels, Gilbert L. Peterson, Barry E. Mullins Dec 2009

Structured P2p Technologies For Distributed Command And Control, Daniel R. Karrels, Gilbert L. Peterson, Barry E. Mullins

Faculty Publications

The utility of Peer-to-Peer (P2P) systems extends far beyond traditional file sharing. This paper provides an overview of how P2P systems are capable of providing robust command and control for Distributed Multi-Agent Systems (DMASs). Specifically, this article presents the evolution of P2P architectures to date by discussing supporting technologies and applicability of each generation of P2P systems. It provides a detailed survey of fundamental design approaches found in modern large-scale P2P systems highlighting design considerations for building and deploying scalable P2P applications. The survey includes unstructured P2P systems, content retrieval systems, communications structured P2P systems, flat structured P2P systems and …

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Why Egregious Errors Of Law May Yet Justify A Refusal Of Enforcement Under The 'New York Convention', Seng Wei, Edward Ti Dec 2009

Why Egregious Errors Of Law May Yet Justify A Refusal Of Enforcement Under The 'New York Convention', Seng Wei, Edward Ti

Research Collection Yong Pung How School Of Law

Parties on the losing side in international arbitration have long argued that an error of law is a defence to the enforcement of foreign awards. Citing article V(2)(b) of the New York Convention, such parties have argued that a manifest error of law is a violation of public policy. While national courts have generally paid little heed to this line of argument, this article seeks to raise the possibility that there may yet be the exceedingly rare instance in which a court should preclude enforcing an award marred by a hideous error of law. Limited review of an arbitrator's application …

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Bs News Dec 2009

Bs News

Building Services Engineering

No abstract provided.

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Tea Leaves Of The Economy: General Elections In 2010?, Eugene K. B. Tan Dec 2009

Tea Leaves Of The Economy: General Elections In 2010?, Eugene K. B. Tan

Research Collection Yong Pung How School Of Law

Incumbent governments with good economic track records would typically capitalise on economic downturns to seize a political advantage by calling for early elections. Will the ruling People's Action Party do so next year in view of the strong economic performances in recent months?

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Biochemical, Immunological And Hi Sto Pathological Changes Of Rat Liver Induced By Carbonyl Iron, Farid Badria, Seham Mancy, Tarek Salem, Ayman Kenawy, Wael Elsaed, Mohamed Sobh Dec 2009

Biochemical, Immunological And Hi Sto Pathological Changes Of Rat Liver Induced By Carbonyl Iron, Farid Badria, Seham Mancy, Tarek Salem, Ayman Kenawy, Wael Elsaed, Mohamed Sobh

Mansoura Medical Journal

Abstract: Iron is a necessary ele­ment for all living cells. Its deficiency with or without anemia is -the main cause of nutritional deficiency for hu­man beings. In other words, there are many forms of diseases associated with excess iron storage. The clini­cally most important of which is he­reditary hemochromatosis (HH). The present study was undertaken to in­vestigate the correlation between bio­chemical, histopathological and im-munological changes in the parameters in liver injury models in­duced by carbonyl iron. 42 Sprague -Dawley rats were used in this study, 12 rats as control and 30 rats were treated with carbonyl iron at a dose …

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Employer Newsletter December 2009, Office Of Cooperative Education And Career Services Dec 2009

Employer Newsletter December 2009, Office Of Cooperative Education And Career Services

RIT Digital Archives

No abstract provided.

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Cybersieves, Derek E. Bambauer Dec 2009

Cybersieves, Derek E. Bambauer

Duke Law Journal

This Article offers a process-based method to assess Internet censorship that is compatible with different value sets about what content should be blocked. Whereas China's Internet censorship receives considerable attention, censorship in the United States and other democratic countries is largely ignored. The Internet is increasingly fragmented by nations' different value judgments about what content is unacceptable. Countries differ not in their intent to censor material-from political dissent in Iran to copyrighted songs in America-but in the content they target, how precisely they block it, and how involved their citizens are in these choices. Previous scholars have analyzed Internet censorship …

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Missouri S&T Magazine Winter 2009, Missouri S&T Marketing And Communications Department, Miner Alumni Association Dec 2009

Missouri S&T Magazine Winter 2009, Missouri S&T Marketing And Communications Department, Miner Alumni Association

Missouri S&T Magazine

No abstract provided.

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On Strategies For Imbalanced Text Classification Using Svm: A Comparative Study, Aixin Sun, Ee Peng Lim, Ying Liu Dec 2009

On Strategies For Imbalanced Text Classification Using Svm: A Comparative Study, Aixin Sun, Ee Peng Lim, Ying Liu

Research Collection School Of Computing and Information Systems

Many real-world text classification tasks involve imbalanced training examples. The strategies proposed to address the imbalanced classification (e.g., resampling, instance weighting), however, have not been systematically evaluated in the text domain. In this paper, we conduct a comparative study on the effectiveness of these strategies in the context of imbalanced text classification using Support Vector Machines (SVM) classifier. SVM is the interest in this study for its good classification accuracy reported in many text classification tasks. We propose a taxonomy to organize all proposed strategies following the training and the test phases in text classification tasks. Based on the taxonomy, …

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A System For Detecting Xml Similarity In Content And Structure Using Relational Database, Waraporn Viyanon, Sanjay Kumar Madria Dec 2009

A System For Detecting Xml Similarity In Content And Structure Using Relational Database, Waraporn Viyanon, Sanjay Kumar Madria

Computer Science Faculty Research & Creative Works

In this paper, we describe a system incorporating an improved technique that detects the similarity of two XML documents based on content and structure similarity using keys. the technique consists of three major components: A subtree generator and validator, a key generator, and similarity components that compare content and structure of the XML documents. First, an XML document is stored in a relational database and extracted into small subtrees using leaf-node parents. the leaf-node parents are considered as a root of a subtree which is then recursively traversed bottom-up for matching. Second, a possible key(s) is identified in order to …

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Angular Mobility Assisted Coverage In Directional Sensor Networks, Cyriac Kandoth, Sriram Chellappan Dec 2009

Angular Mobility Assisted Coverage In Directional Sensor Networks, Cyriac Kandoth, Sriram Chellappan

Computer Science Faculty Research & Creative Works

In this paper, we consider the issue of angular mobility assisted coverage enhancement in directional camera sensor networks. in our model, each sensor can visually capture (i.e. sense) events within a sector in its field of view and can also rotate about a fixed axis to enhance its coverage. the problem we particularly address is how to enhance blanket coverage leveraging angular mobility of the sensors in the network starting from an arbitrary initial deployment. the core idea of our algorithm, called the Face Away algorithm, is to use the known directions of neighboring sensors to find the direction with …

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Event Coverage In Sparse Mobile Sensor Networks, Mark Snyder, Sriram Chellappan Dec 2009

Event Coverage In Sparse Mobile Sensor Networks, Mark Snyder, Sriram Chellappan

Computer Science Faculty Research & Creative Works

Autonomous mobile sensors are employed with ever-increasing frequency, in applications ranging from search and rescue, detection of forest fires, and battlefield surveillance. in this paper, we consider a representative surveillance problem wherein a sparse number of mobile sensors are expected to cover events of interest in a deployment field. Each event appears for a certain time and then disappears. Furthermore, the location of each event and its duration is unknown. in this paper, we design a sensor movement strategy based on efficient traversal in the network to fulfill two objectives: maximizing event detection and minimizing detection delay. Analysis and simulations …

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Privacy Preserving Portable Health Record (P³Hr), Pavan Roy Marupally, Vamsi Paruchuri, Sriram Chellappan Dec 2009

Privacy Preserving Portable Health Record (P³Hr), Pavan Roy Marupally, Vamsi Paruchuri, Sriram Chellappan

Computer Science Faculty Research & Creative Works

Personal health records (PHRs) offer significant potential to stimulate transformational changes in health care delivery and self-care by patients. There is a gap between today's personal health records (PHRs) and what patients say they want and need from this electronic tool for managing their health information. Current barriers to PHR adoption among patients include cost, concerns that information is not protected or private, inconvenience, design shortcomings, and the inability to share information across organizations. We propose a novel architecture to bridge the gap based on Privacy Preserving Portable Health Record(P3HR), a device that incorporates a smart card into …

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Directed Coverage In Wireless Sensor Networks: Concept And Quality, Xiaole Bai, Lei Ding, Jin Teng, Sriram Chellappan, Changqing Xu, Dong Xuan Dec 2009

Directed Coverage In Wireless Sensor Networks: Concept And Quality, Xiaole Bai, Lei Ding, Jin Teng, Sriram Chellappan, Changqing Xu, Dong Xuan

Computer Science Faculty Research & Creative Works

In this paper, we introduce a new type of coverage for wireless sensor networks, called Directed Coverage (D-Coverage). Basically, D-Coverage is the coverage provided by a sensor network monitoring an area between two boundaries, through which the intruder attempts to penetrates the area. We also study how to measure the quality of D-Coverage. Our first evaluation approach is a projection-Based simple approach, while our second approach is a more comprehensive Markov chain-based approach. Our evaluation approaches can accurately evaluate the quality and provide good guidelines for sensor network deployment and run-time repair. ©2009 IEEE.

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