Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Other

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type

Articles 16351 - 16380 of 25823

Full-Text Articles in Entire DC Network

A Cmos Conductometric Circuit For Chemical Sensing Using Nanowire Sensor Arrays, Sujith S. Dermal Jan 2013

A Cmos Conductometric Circuit For Chemical Sensing Using Nanowire Sensor Arrays, Sujith S. Dermal

Electrical Engineering Theses - Archive

In this thesis, a readout circuit for conductometric electrochemical sensor array is designed and implemented. It is designed to work with the output range of a Carbon Nanotube Chemiresistive Sensor Array. The sensor arrays are designed to measure the Volatile Organic Compounds (VOCs) in the environment. The circuit reads out the outputs of the sixteen conductometric sensor arrays and calculates the change in conductance during the interaction with the chemicals present in the environment. A constant voltage is applied to the sensor arrays and when the sensor detects the VOCs, it changes the conductance and a change in current through …

Go to article

Distributed Data Dimensionality Reduction And Denoising, Abiodun T. Aduroja Jan 2013

Distributed Data Dimensionality Reduction And Denoising, Abiodun T. Aduroja

Electrical Engineering Theses - Archive

With the recent upsurge in the amount of data transmission and use, giving rise to the era of big data, research has put a lot of emphasis on designing efficient methods to extract useful information by reducing the size of a large set of data to a much smaller set. This is the main idea in data dimensionality reduction which is a critical step in applications that involve a constantly increasing data size, and limited computational and communication resources. Such a situation appears in sensor networks where there is a large number of sensors acquiring data. However, the informative part …

Go to article

Acute Elevation In Estradiol Influences The Salience Of Cocaine Cues, Samara Morris Bobzean Jan 2013

Acute Elevation In Estradiol Influences The Salience Of Cocaine Cues, Samara Morris Bobzean

Psychology Theses - Archive

Previous research demonstrates that women and female rodents are more responsive to environmental stimuli associated with drug reward than males. A growing body of literature supports a role for estradiol as one of the mechanisms underlying sex differences in the behavioral response to drugs of abuse. However, little is known about the influence of acute elevations in levels of estradiol on cocaine conditioned behaviors. Thus, the purpose of the present study was to investigate the influence of an acute increase in systemic estradiol levels on the expression of cocaine-induced conditioned place preference (CPP). Experimentally naïve, adult female Long Evans rats …

Go to article

The Prosecutor's Role In Helping Domestic Violence Victims, Latasha Jackson-Mcdougle Jan 2013

The Prosecutor's Role In Helping Domestic Violence Victims, Latasha Jackson-Mcdougle

Criminology & Criminal Justice Theses - Archive

This study examines the Prosecutors role when handling Domestic Violence cases and how they can better help serve battered women and their children without re-victimizing them through the Criminal Justice Juridical system by reviewing secondary survey data. Two statistical analyses were performed to determine if the current way Prosecutors are handling domestic violence cases are in favor to help the battered woman and their children or is it re-victimizing them and not helping them be safe. The hypothesis predicts there is a positive relationship between battered women and their children being re-victimized by the legal system and process.

Go to article

Attitudes And Beliefs Regarding Sexual Assaults, Amber Mosier Jan 2013

Attitudes And Beliefs Regarding Sexual Assaults, Amber Mosier

Criminology & Criminal Justice Theses - Archive

Perceptions of sexual assaults were compared among college students in this thesis. The findings indicate that men and women have significantly different perceptions of sexual assault and the fairness of the criminal justice system. The findings also showed that those who are criminal justice majors as opposed to those who are not do not generally have significantly different perceptions of sexual assault. The one exception to this was that CRCJ majors are more likely to believe a victim has given a false report of sexual assault victimization to law enforcement. Self-reported likelihood of reporting sexual assault victimization to law enforcement …

Go to article

The Mass Incarceration Of Minorities And Women, Tanisha Ann Bowens Jan 2013

The Mass Incarceration Of Minorities And Women, Tanisha Ann Bowens

Criminology & Criminal Justice Theses - Archive

The purpose of this study is to examine the knowledge and perceptions of graduate and undergraduate students attending the University of Texas of Arlington Spring 2013. The data for this study was obtained from a sample students primarily majoring in criminology and criminal justice, social work, and business enrolled at the University of Texas at Arlington. Students appeared to appeared to be more knowledgeable about the mass incarceration of minorities, however there was little no significant difference in knowledge and perception among criminology and justice and other departments.

Go to article

Media Attention Towards Serial Killers And Mass Murderers And Its Impact Towards Attitudes On Capital Punishment, Febee M. Qubtan Jan 2013

Media Attention Towards Serial Killers And Mass Murderers And Its Impact Towards Attitudes On Capital Punishment, Febee M. Qubtan

Criminology & Criminal Justice Theses - Archive

Attitudes towards the criminal justice system and capital punishment were researched among 164 undergraduate students at the University of Texas at Arlington. The findings revealed that participants who watched crime related media, or that involving murderers and/or criminal activity, on a regular basis were less punitive in nature. Participants who do not regularly engage in watching crime related media were more supportive of capital punishment.

Go to article

Eutectic Diffusion Brazing Process For Joining Aluminum Laminae With Macro- And Micro- Scale Features, Paul Wilson Jan 2013

Eutectic Diffusion Brazing Process For Joining Aluminum Laminae With Macro- And Micro- Scale Features, Paul Wilson

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

Eutectic brazing occurs when two metals, such as aluminum and copper, react and diffuse together at a temperature lower than either material would melt separately. Commonly used in electronics manufacturing, this brazing method provides the basis for a new process of joining a laminated device with micro fluidic features. The proposed process overcomes the challenges of aluminum oxidation resulting from traditional diffusion bonding of aluminum laminae and does not require flux or caustic material pre-treatments. The process also protects surface geometries and avoids warpage, which is common with other higher-temperature joining processes such as welding. This research provides a foundation …

Go to article

Outcome And State Transition Modeling For Adaptive Interdisciplinary Pain Management, Aera Kim Leboulluec Jan 2013

Outcome And State Transition Modeling For Adaptive Interdisciplinary Pain Management, Aera Kim Leboulluec

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

Pain management is a major global health problem. The World Health Organization estimates that, globally, 1 in 5 adults suffer from chronic pain and in the United States alone, chronic pain affects nearly 100 million adults resulting in an estimated annual cost of $560 to $635 billion. The University of Texas at Arlington and the Eugene McDermott Center for Pain Management at the University of Texas Southwestern Medical Center at Dallas (The Center) are collaborating to seek adaptive treatment strategies for interdisciplinary pain management in a two-stage program. Interdisciplinary pain management combines multiple disciplines of professionals to understand the biological …

Go to article

Development Of Optimal Decision Model For Multi-System Process Capability Improvements Through A Personnel Environment And Integration (Pei) Framework Utilizing Radio Frequency Identification (Rfid) Technology, Maurice Dwayne Cavitt Jan 2013

Development Of Optimal Decision Model For Multi-System Process Capability Improvements Through A Personnel Environment And Integration (Pei) Framework Utilizing Radio Frequency Identification (Rfid) Technology, Maurice Dwayne Cavitt

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

This research describes a framework that minimizes uncertainty and risk in lead time and excessive costs associated with multi-automating systems in very complex and dynamic environments. Further, by seeking to reduce risk by increasing the reliability component of the system, crucial inventories levels are maintained and leveraged in complex an environment that provides additional organization cost savings and enhanced flexibility by enhancing their ability to optimize inventories. Inventory control is crucial for any supply chain as it drives the costs which influence business decision models. The reliability of the systems that maintain the important inventories in complex operations is crucial …

Go to article

Multistep Second Order Training For The Multilayer Perceptron, Melvin Deloyd Robinson Jan 2013

Multistep Second Order Training For The Multilayer Perceptron, Melvin Deloyd Robinson

Electrical Engineering Dissertations - Archive

Training a feedforward multilayer perceptron (MLP) requires obtaining train- ing data and solving a non-convex optimization problem to calculate the network's weights. Various problems can arise during training that ultimately can limit a MLP's usefulness such as slow convergence and high computational complexity. Additionally, when training one needs to have confidence that the chosen algorithm is working optimally for the chosen coordinate system.We introduce novel second order training algorithms to overcome these difficulties. In the process, a piecewise affine model of the multilayer perceptron is introduced which shows that objective functions for training are poorly modeled by quadratic functions of …

Go to article

A Study Of The Characteristics And Limitations Of Various Platings On Cylindrical Electrical Conductors, Robert C. Scully Jan 2013

A Study Of The Characteristics And Limitations Of Various Platings On Cylindrical Electrical Conductors, Robert C. Scully

Electrical Engineering Dissertations - Archive

This work explores the impedance characteristics of copper wires plated with tin, silver, or nickel, the most common type of wiring used in the computer, communications, and aerospace industries. The background of plated wires and a brief review of related research is provided. This is followed by a detailed development of the theory of plated wires, accompanied by a MAPLE code in the appendix that can be used for the numerical analysis of plated wires having two or more plating layers. The code was used to generate a series of curves predicting the impedance behavior of both solid, "pure" metals, …

Go to article

Capacity Fading Induced On Electrochemical Energy Storage Cells As A Result Of High C Discharge, Biju Shrestha Jan 2013

Capacity Fading Induced On Electrochemical Energy Storage Cells As A Result Of High C Discharge, Biju Shrestha

Electrical Engineering Dissertations - Archive

A number of electrochemical energy storage devices have been developed and used widely to power portable electronic systems. Lithium-ion batteries are extremely popular for use in portable devices as a result of their high energy density, which is higher than almost all other similar technologies available. Despite their high energy density, most commercial off-the-shelf (COTS) cells are only modestly power dense, limiting them from being used to drive high power or pulsed power applications. Recently, improvements in the electrode structures and electrolytes have led to the development of lithium-ion batteries which have a higher combined power and energy density than …

Go to article

Optimizing The Use Of Systems Engineering On Proposals, Clement Douglas Smartt Jan 2013

Optimizing The Use Of Systems Engineering On Proposals, Clement Douglas Smartt

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

Organizations whose primary business is executing contracts must be able to capture contracts to survive. When the contracts involve engineering complex systems, systems engineering often plays a significant role in the proposal process, sometimes leading the technical effort. This research seeks to find an optimal use of systems engineering in proposal management to maximize the probability that a supplier organization will be awarded contracts. A number of systems engineering related factors that can potentially be used to predict contract awards are identified that pertain to the organization, the skill levels of employees, the competitive environment, the proposal project, the contract, …

Go to article

Elevated Recharge Of Electrochemical Cells, Peter Novak Jan 2013

Elevated Recharge Of Electrochemical Cells, Peter Novak

Electrical Engineering Dissertations - Archive

Electrochemical cells are energy dense storage devices used to power everything from small portable electronics such as cell phones, to larger systems including electric and hybrid-electric vehicles or even electric utility backup supplies. In recent years, the electrochemical community has analyzed many aspects of cell performance with papers covering the influence of temperature, humidity, pressure, and various other factors on the aging of different types of cells. Despite the abundance of information on various issues, very little work has been presented in the area of high rate elevated charge and even less work regarding high rate pulsed elevated charge. This …

Go to article

Improving Gesture Recognition Performance Using The Dynamic Space-Time Warp Algorithm, Danny Allen Hanson Jan 2013

Improving Gesture Recognition Performance Using The Dynamic Space-Time Warp Algorithm, Danny Allen Hanson

Computer Science and Engineering Theses - Archive

The DSTW algorithm was originally used as the fundamental algorithm for a gesture recognition software. When the need arose for implementing gesture recognition on-board a robotic vehicle, the original recognition software needed to undergo several changes in order to meet the requirements of the target platform. The original software was written in Matlab and had to be ported into a native language in order to operate on the new platform. To support experiments needed to select a distance and t function, the new code needed to be designed to support dynamic binding of distance and transition (t) functions. The software …

Go to article

Learning Equivalent Input Channel Mappings And Generalized Features For Pattern Transfer, Houtan Rahmanian Jan 2013

Learning Equivalent Input Channel Mappings And Generalized Features For Pattern Transfer, Houtan Rahmanian

Computer Science and Engineering Theses - Archive

In many real-world modeling applications, it is needed to detect the origin of the patterns of the input data in addition to find the patterns themselves. Having the input data generated by a systematically organized set of input channels is very common in these applications. These input channels might also be of the same type. Therefore, the same pattern might be observed on different sets of input channels of the data, while it is caused by the one source in different localities. Sparse coding is a very powerful method for learning high-level patterns (i.e. high-level features) from raw data input. …

Go to article

Internal Structure And Dynamic Decisions For Coalitions On Graphs, Muhammad Aurangzeb Jan 2013

Internal Structure And Dynamic Decisions For Coalitions On Graphs, Muhammad Aurangzeb

Electrical Engineering Dissertations - Archive

The notions of collaboration, advantage, cost and impact are investigated in this dissertation, following are the details. Contribution to Cooperation between Agents for Routing in an Unknown Graph Using Reinforcement LearningFirst of all this work investigates the cooperation between agents to achieve a common goal. The problem of steering a swarm of autonomous agents out of an unknown maze to some goal located at an unknown location is discussed in this context. The routing algorithm given here provides a mechanism for storing data based on the experiences of previous agents visiting a node that results in routing decisions that improve …

Go to article

Wireless Power Transmission Based On Retro-Reflective Antenna Array, Shaoshu Sha Jan 2013

Wireless Power Transmission Based On Retro-Reflective Antenna Array, Shaoshu Sha

Electrical Engineering Dissertations - Archive

In recent years, there is a lot of research on wireless power transmission (WPT) for various applications, such as mobile devices, electric vehicles, implanted medical devices, sensors, RFID, etc. Compared to wired power transmission, WPT is more convenient and allows the devices to move more freely. Microwave beamforming WPT has been investigated extensively because its fast tracking capability, multiple target tracking capability and so on. A retro-reflective antenna array based on novel phase-conjugate method is proposed in this dissertation. The phase of the received signal is detected individually and simultaneously at each antenna and the conjugated phase is applied to …

Go to article

Adaptive Dialogue Systems For Assistive Living Environments, Alexandros Papangelis Jan 2013

Adaptive Dialogue Systems For Assistive Living Environments, Alexandros Papangelis

Computer Science and Engineering Dissertations - Archive

Adaptive Dialogue Systems (ADS) are intelligent systems, able to interact with users via multiple modalities, such as speech, gestures, facial expressions and others. Such systems are able to make conversation with their users, usually on a specific, narrow topic. Assistive Living Environments are environments where the users are by definition not competent with technology, due to various factors, such as mental or physical disabilities, age and others. While technology that helps improve these people's quality of life exists, many times they cannot access it due to inflexible interfaces. ADS, therefore, have the potential to bridge users and technology by acting …

Go to article

Viewpoint Invariant Gesture Recognition And 3d Hand Pose Estimation Using Rgb-D, Paul Doliotis Jan 2013

Viewpoint Invariant Gesture Recognition And 3d Hand Pose Estimation Using Rgb-D, Paul Doliotis

Computer Science and Engineering Dissertations - Archive

The broad application domain of the work presented in this thesis is pattern classifi-cation with a focus on gesture recognition and 3D hand pose estimation. One of the main contributions of the proposed thesis is a novel method for 3D hand pose estimation using RGB-D. Hand pose estimation is formulated as a database retrieval problem. The proposed method investigates and introduces new similarity measures for similarity search in a database of RGB-D hand images. At the same time, towards making 3D hand pose estimation methods more automatic, a novel hand segmentation method is introduced which also relies on depth data. …

Go to article

Detection Of Fingers With A Depth Based Hand-Detector In Static Frames, Sanjay Vasudeva Iyer Jan 2013

Detection Of Fingers With A Depth Based Hand-Detector In Static Frames, Sanjay Vasudeva Iyer

Computer Science and Engineering Theses - Archive

This thesis presents a method for a finger detection system. It is assumed that the user taps their fingers on a table, and that the camera is placed on the same table in front of their fingers. This setup is motivated by the application of analyzing the movement of fingers in patients engaging in physical therapy. Fingers are detected in static images, which is a more challenging task than detecting and tracking fingers in videos which are based on motion.The Microsoft Kinect sensor has been used as a source for data, and it provides color and depth images at each …

Go to article

Rfid And Rtls Enhancement For Retained Surgical Instrument In The Body, Ida Lumintu Jan 2013

Rfid And Rtls Enhancement For Retained Surgical Instrument In The Body, Ida Lumintu

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

Retained surgical items (e.g., sponges, needles, and instruments) are classified as preventable medical errors that cost the United States about $17 to $29 billion each year and the most frequently reported sentinel events in 2011 as reported by the Joint Commission. This research proposes a new approach to decrease such preventable medical errors by developing a Radio Frequency Identification-based Real Time Locating System (RTLS) for surgical operations (RfSurg). Patient safety concern, e.g. the excessive exposure of x-ray to the patient after the surgery, is a major motivation behind the need of RTLS in this research. The use of RTLS techniques …

Go to article

Hardware And Software Systems For Control Of Assistive Robotic Devices Using Point-Of-Gaze Estimation, Christopher Dale Mcmurrough Jan 2013

Hardware And Software Systems For Control Of Assistive Robotic Devices Using Point-Of-Gaze Estimation, Christopher Dale Mcmurrough

Computer Science and Engineering Dissertations - Archive

Eye gaze based interaction has many useful applications in human-machine interfaces, assistive technologies, and multimodal systems. Traditional input methods, such as the keyboard and mouse, are not practical in many situations and can be ineffective for some users with physical impairments. Knowledge of the user point of gaze (PoG) can be a powerful data modality in intelligent systems by facilitating intuitive control, perception of user intent, and enhanced interactive experiences.This research aims to advance the use of non-traditional, multimodal interfaces in assistive robotic devices for the benefit of users with severe physical disabilities. The data modalities which are of particular …

Go to article

Multiport Dc Energy Conversion Systems, Hamid Behjati Jan 2013

Multiport Dc Energy Conversion Systems, Hamid Behjati

Electrical Engineering Dissertations - Archive

Sustainable energy sources and power electronic systems for utilizing such energy sources are becoming indispensible components of the modern power grid. The ability of multiport converters to mitigate the intermittency issues associated with these energy sources have made them attractive candidates for renewable energy conversion systems. Two single-stage multiport dc-dc converters, with independent and series outputs, are proposed in this dissertation. The advantages and applications of the proposed topologies are discussed. The ability of the proposed converters to regulate the input powers, coming from different energy sources, in addition to regulating the output voltages stands out. Specific switching schemes are …

Go to article

Investigation Of Degradation In Advanced Analog Mos Technologies, Md. Iqbal Mahmud Jan 2013

Investigation Of Degradation In Advanced Analog Mos Technologies, Md. Iqbal Mahmud

Electrical Engineering Dissertations - Archive

The focus of this work is to study the noise and degradation in advanced high and low voltage analog Metal Oxide Semiconductor Field Effect Transistors (MOSFET). Medium and high voltage transistors, especially lateral double diffused MOS (LDMOS) FETs have numerous practical applications. Although the LDMOS concept dates back some years, importance of low-frequency noise (also known as 1/f noise) characteristics of these devices have attracted attention only recently, due to some major reliability concerns. As an example, 1/f noise can cause a severe impact in System-on-Chip (SOC) applications when the LDMOS transistor is coupled with other devices or circuits through …

Go to article

Design And Analysis Of Location Centered Large-Scale Opportunistic Networks, Shanshan Lu Jan 2013

Design And Analysis Of Location Centered Large-Scale Opportunistic Networks, Shanshan Lu

Computer Science and Engineering Dissertations - Archive

With the high penetration of mobile devices and their equipments of wireless interfaces in people's lives, the development of the scenario of Opportunistic Networks(OppNets) has become available. OppNets enable transmissions by exploiting temporary wireless links and connections opportunistically arising from mobility nature of nodes. The applications of OppNets have emerged in a wide range of areas.OppNets have attracted a lot of attention from the wireless and mobile network research community, while little has been paid to the OppNets in large-scale scenario. The existing OppNets are not scaled well to large-scale area due to the high uncertainty embedded in transient contacts …

Go to article

Design And Fabrication Of Guided-Mode Resonant Tunable Optical Filters, Mohammad Jalal Uddin Jan 2013

Design And Fabrication Of Guided-Mode Resonant Tunable Optical Filters, Mohammad Jalal Uddin

Electrical Engineering Dissertations - Archive

Tunable optical filters have many applications in optical communication, multispectral and hyper-spectral imaging, bio-sensing, and display application. In optical communication, tunable optical filters (TOF) are used extensively in different wavelength division multiplexed (WDM) related applications. In display applications TOFs have been being used as color filters (CF) to separate primary colors from incident white light. In this study, two types of TOFs have been designed and fabricated: 1) thermo-optic tunable optical filters (TOTOF) working in optical communication bands and 2) tunable color filters (TCF) working in visible wavelength range.TOTOFs with deep (120 nm grating depth) and shallow (20 nm grating …

Go to article

Nanogap Break Junctions And Solid-State Micropores As Electronic Biosensors, Azhar Ilyas Jan 2013

Nanogap Break Junctions And Solid-State Micropores As Electronic Biosensors, Azhar Ilyas

Electrical Engineering Dissertations - Archive

Cancer has been the top ranked fatal disease for the last several decades. Most of the cancers remain silent at its earlier stage and are usually diagnosed at advanced and incurable phase. Early detection of cancer can have immediate and far reaching impact on better prognosis of cancer patients. Diseases are initially expressed at molecular and cellular scale and identification of these deadly diseases at such small scales would be a great step toward early detection. The study of biological molecules and diseased cells require efficient fabrication techniques to develop sensing devices with molecular size entrapment. Bio-nanotechnology and BioMEMs promise …

Go to article

Compressive Sensing For Wireless And Sensor Systems, Ji Wu Jan 2013

Compressive Sensing For Wireless And Sensor Systems, Ji Wu

Electrical Engineering Dissertations - Archive

Compressive sensing (CS) is an emerging field based on the revelation that a small collection of linear projections of a sparse signal contains enough information for stable, sub-Nyquist signal acquisition. It provides a potential way to acquire the sparse data efficiently, or equivalently, highly accurate recovery of sparse data from undersampled measurements. Huffman coding and compressive sensing are adopted to compress real-world wind tunnel data. Both uniform and non-uniform Huffman coding are evaluated in terms of the number of quantization levels, mean square error, codeword length and compression ratio. The main drawback of Huffman coding is that it requires calculating …

Go to article

First Prev Next Last