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Full-Text Articles in Entire DC Network
Thermal Stresses Of Composite Beams With Rectangular And Tubular Cross-Sections, Chia-Wei Su
Thermal Stresses Of Composite Beams With Rectangular And Tubular Cross-Sections, Chia-Wei Su
Mechanical and Aerospace Engineering Theses - Archive
Closed-form analytical solutions for laminated composite beams with tubular and rectangular cross-sections are developed for evaluating the thermal induced stresses. The derivations are based on modified lamination theory and parallel axis theorem. The present approach includes variation of ply stiffness along the contour of the cross-section. The interlaminar shear stress of cantilever composite beam with rectangular cross-section under a transverse load is analytically proved to be independent of temperature change in uniform temperature environment. Three-dimensional finite element models for computing thermal stresses of both cross-sections are developed using commercial software package ANSYS 10. The results obtained from analytical solutions give …
Surface Patterning Of Biodegradable Polymer In Tissue Engineering By Applying Photolithography, Lee-Chun Su
Surface Patterning Of Biodegradable Polymer In Tissue Engineering By Applying Photolithography, Lee-Chun Su
Material Science and Engineering Theses - Archive
The prevalence of cardiovascular disease and inherent problems with current surgical therapies has prompted major efforts in the field of vascular tissue engineering. While there have been significant advances towards creating functional blood vessel substitutes, the fabrication of a vascular graft with mechanical, structural and functional properties similar to native vessels has not yet been achieved. We have presented an observation of a new biodegradable polymer utilized on the research of tissue engineering. Our idea was to create a structure to imitate blood vessel muscles in vitro and also to guide the cells when they start spreading and trying to …
Thermally Activated Sulfurization Scheme For Cuins2 Solar Cells, Karan Agrawal
Thermally Activated Sulfurization Scheme For Cuins2 Solar Cells, Karan Agrawal
Material Science and Engineering Theses - Archive
Chalcopyrite Solar Cells are now being fabricated on flexible (polymer) substrates. However, CuInS2 solar cells have not been fabricated on the polymer substrates on the commercial scale due the sulfurization temperature which limits the use of polymer substrates during fabrication. To overcome this problem a thermally activated sulfurization process for the manufacture of CuInS2 solar cells from the Cu-In bilayers is described in this work. This sulfurization process can be employed for lower temperature for the formation of the absorber layer. For the sulfurization, the Cu-In bilayer with different compositions is prepared by thermal evaporation in which the In-rich film …
Use Of Filtering To Improve The Estimates Of Low-Cost Gps Systems Using Known Geometric Configurations Of Multiple Gps Receivers, Husein Anshur
Use Of Filtering To Improve The Estimates Of Low-Cost Gps Systems Using Known Geometric Configurations Of Multiple Gps Receivers, Husein Anshur
McNair Scholars Research Journal
No abstract provided.
Ductile Lightweight Concrete For Lightweight Structural Application, Ake Piyamaikongdech
Ductile Lightweight Concrete For Lightweight Structural Application, Ake Piyamaikongdech
Civil Engineering Theses - Archive
This study developed a ductile concrete for precast wall systems which are capable of resisting high wind in excess of 500 mph. The developed concrete mix design consists of sand, cement, glass fiber, and a foaming agent to produce lightweight concrete in the range of 87 pcf (1392 kg/m3) to 90 pcf (1440 kg/m3). A comprehensive testing program for evaluation of the developed concrete material was undertaken. The mix designs were prepared both in the laboratory and in the mix truck with drum capacity of 27 ft3 (0.77 m3), and 177.6 ft3 (5 m3), respectively. The large concrete batches using …
Learning Video Preferences Using Visual Features And Closed Captions, Darin Brezeale
Learning Video Preferences Using Visual Features And Closed Captions, Darin Brezeale
Computer Science and Engineering Dissertations - Archive
Viewers of video now have more choices than ever. As the number of choices increases, the task of searching through these choices to locate video of interest is becoming more difficult. Current methods for learning a viewer's preferences in order to automate the search process rely either on video having content descriptions or on having been rated by other viewers identified as being similar. However, much video exists that does not meet these requirements. To address this need, we use hidden Markov models to learn the preferences of a viewer by combining visual features and closed captions. We validate our …
Formulation Of Lean Six Sigma Critical Business Processes For Manufacturing Facilitites, Chaucey Chandler
Formulation Of Lean Six Sigma Critical Business Processes For Manufacturing Facilitites, Chaucey Chandler
Industrial, Manufacturing, and Systems Engineering Dissertations - Archive
The author desired to create a method organizing the concepts from Lean, Six Sigma, critical business processes, and simplifying the usage of these concepts to identify Lean Six Sigma Critical Business Processes. Inspired by Laura Meade (1997) and the author's passion concerning process improvements, this research was created. Lean activities eliminate waste, Six Sigma activities eliminate variation, critical business processes focus on those areas that need improvement and are critical to the process, and Analytical Network Process (ANP) models problems considering the interactions between levels. There is value for all companies to implement at least one of these tools. Since …
Localization In Noisy Environment Using Extended Kalman Filter, Aneeket Suresh Patkar
Localization In Noisy Environment Using Extended Kalman Filter, Aneeket Suresh Patkar
Electrical Engineering Theses - Archive
Localization is an important aspect of Wireless Sensor Networks. Information regarding the position of the sensor nodes is not always known. Without the position information of the sensors, the data reported by the sensors is of little use. Various approaches have been used to perform localization using some information about the sensor node. Potential field approach for localization, using distance information has been successfully tested with satisfactory results. However in case of noisy environment, the range measurements have greater inaccuracy. In such cases, localization using the above algorithm can provide some inaccuracy. To rectify such erroneous localization situations, Extended Kalman …
Decoupling Of Hamiltonian System With Applications To Linear Quadratic Problem, Vishal Gupta
Decoupling Of Hamiltonian System With Applications To Linear Quadratic Problem, Vishal Gupta
Electrical Engineering Theses - Archive
This thesis provides a method of decoupling the Hamiltonian system with application to linear quadratic problem in control system. Resulting decoupled Hamiltonian system helps in formulating easy closed form solution to various optimal control problems. These closed form solution are improvement over the problem of solving first order nonlinear differential equations in conventional methods. Decoupling also eliminates the constraint, "Q = 0 " for certain type of optimal control.
Multi-Objective Evaluation Of Dynamic Facility Layout Using Ant Colony Optimization, Gary Yu-Hsin Chen
Multi-Objective Evaluation Of Dynamic Facility Layout Using Ant Colony Optimization, Gary Yu-Hsin Chen
Industrial, Manufacturing, and Systems Engineering Dissertations - Archive
The Dynamic Facility Layout Problem (DFLP) deals with changes of facility layout throughout time. As an extension to Static Facility Layout Problem (SFLP), it has gathered increasing interests lately. Facility layouts are constantly modified over time either to meet customers' changing demands in product designs and functionalities or to keep pace with technological innovations. Manufacturers must stay flexible and agile and frequent facility layout changes are needed. Since there is often insufficient time and insufficient funding to build a new manufacturing plant, it is often necessary to rearrange the current plant layout. Even though the rearrangement of plant layout can …
On The Study Of Multi-Channel Eeg: Lossless Compression, Signal Modeling And Classification, Yodchanan Wongsawat
On The Study Of Multi-Channel Eeg: Lossless Compression, Signal Modeling And Classification, Yodchanan Wongsawat
Electrical Engineering Dissertations - Archive
Recently, electroencephalogram (EEG) has become necessary for diagnosis, telemedicine, and brain computer interface (BCI). This thesis investigates three signal processing tools which can explore multi-channel structures of the EEG for different applications such as lossless compression, artifact removal, and classification. First, this thesis presents a method for approximating the Karhunen-Loeve transform (KLT) of multi-channel EEG signals. The proposed transform is further parameterized by lifting factorization by which the coefficients' dynamic range is controlled through a proposed pivoting scheme, rendering a reversible structure under quantization of coefficients called IntSKLT. A lossless coder for multi-channel EEG signals which exploits inter-channel correlation among …
Distributed Predictive Health Monitoring, Jorge David Herrera Gonzalez
Distributed Predictive Health Monitoring, Jorge David Herrera Gonzalez
Computer Science and Engineering Theses - Archive
According to the National Center for Health Statistics the major causes of death in the US are (per year) heart diseases with 654 thousand cases, followed by cancer with 550 thousand cases and stroke with 150 thousand cases. In this project we propose, design, implement and test a prototype of a system that promises to improve the level of detection and prediction of several diseases and improves the quality of life of patients by utilizing non-invasive wireless medical sensors. This system is composed of a set of wireless medical sensors, a nearby (close-proximity) PDA (personal digital accessory) or cell phone …
Cxlengine - A Comprehensive Xml Loosely Structured Search Engine, Indhu Krishna Sivaramakrishnan
Cxlengine - A Comprehensive Xml Loosely Structured Search Engine, Indhu Krishna Sivaramakrishnan
Computer Science and Engineering Theses - Archive
XML keyword search has been a widely researched area. [15] has proposed an XML semantic search engine called OOXSearch, which answers loosely structured queries. The framework of OOXSearch takes into account the semantic relationship between nodes based on their contexts. The context of a node is determined by its parent node. The label "name", for example, could mean the name of a book and could also mean the name of the book's author. If we try to consider the relationship between these two nodes without considering their parent nodes, we would be drawing the incorrect conclusion that these two nodes …
Limitations Of Ieee 802.15.4 Based Wireless Mesh Networks For Wireless Localization, William Anthony Wallace
Limitations Of Ieee 802.15.4 Based Wireless Mesh Networks For Wireless Localization, William Anthony Wallace
Computer Science and Engineering Theses - Archive
It is highly desirable to create rapidly and inexpensively deployable mesh networks in certain scenarios. Consider the case of a large storage warehouse; workers are constantly moving in the area and not only do they need to send data periodically but their location needs to be tracked as well. Setting up such network can be accomplished with the IEEE 802.15.4 standard, but a mesh network must be created. There would need to be stationary 802.15.4 nodes that join together to form a backbone infrastructure. This backbone infrastructure (mesh network) would allow the workers, using mobile 802.15.4 nodes, to transmit their …
Integrated Mems Microsensors, Murali M. Chitteboyina
Integrated Mems Microsensors, Murali M. Chitteboyina
Electrical Engineering Dissertations - Archive
Many Micro-Electro-Mechanical Systems (MEMS) products have been commercialized at a fraction of the cost and size of conventional devices. Low cost, small sizes and multi-function are the ultimate objectives of commodity MEMS devices. An intelligent micro-system requires that the processing circuitry, sensors, and actuators be integrated on the same chip. Integrated MEMS can improve performance of the overall product in several applications. In this work integrated MEMS devices are investigated through semiconducting Yttrium Barium Copper Oxide (YBaCuO) microbolometer arrays on complementary metal oxide semiconductor (CMOS) substrates, a novel tunable infrared microspectrometer, and a novel device-level packaging technique for MEMS resonators. …
Design And Functionality Analysis Of Operational Amplifiers With Rail-To-Rail Input And Output Capability, Mingsheng Peng
Design And Functionality Analysis Of Operational Amplifiers With Rail-To-Rail Input And Output Capability, Mingsheng Peng
Electrical Engineering Dissertations - Archive
The operational amplifier (op amp) is a fundamental building block in analog integrated circuit design. For low power-supply voltages, the common-mode input voltage and the output voltage of op amps are always required to be able to swing from the negative power-supply rail to the positive power-supply rail, i.e., rail-to-rail. In this dissertation, op amps with rail-to-rail input and output capability are investigated. This dissertation mainly focuses on the rail-to-rail input stage design. Two different rail-to-rail input stages with a single differential pair and a common-mode adapter are presented. The common-mode adapter is used to shift the common-mode input voltage. …
Subrosa: An Experimental Platform For Studying Timing Analysis Of Real Time Anonymity Systems, Hatim Asger Daginawala
Subrosa: An Experimental Platform For Studying Timing Analysis Of Real Time Anonymity Systems, Hatim Asger Daginawala
Computer Science and Engineering Theses - Archive
Timing analysis poses a significant challenge for the mix based anonymous systems that wish to support low-latency applications like web browsing, instant messaging and Voice over IP (VOIP). Research in this area so far has been done through simulations on ad hoc simulators or non practical local area networks. We developed SubRosa, an experimental platform for studying timing analysis of real time anonymity systems to facilitate the study of Tor like low-latency anonymous systems. We present results of experiments on a real distributed network test bed PlanetLab, where we studied timing analysis attacks and some of the defenses to protect …
A Potential Field Approach For Distributed Control Of Discrete Actuator And Sensor Arrays, Pritpal S. Dang
A Potential Field Approach For Distributed Control Of Discrete Actuator And Sensor Arrays, Pritpal S. Dang
Electrical Engineering Dissertations - Archive
This dissertation presents new methods of distributed sensing, classification and actuation using potential field and neural network approaches. Human look-a-like robot serves as an excellent tool to implement the strategies developed for sensing, classification and actuation. Achieving dexterity in human-machine interaction or human look-a-like robot helps in better understanding of dynamic and complex environment. This work deals with the issues related to gain autonomy and adaptability through distributed sensing, classification and actuation capabilities. The work presented here starts by mentioning novel strategies employed for morphing a flexible structure to achieve the desired expressions on the artificial skin and then moves …
Panda Monitoring - A System To Monitor High Performance Computing For The Atlas Experiment-Design, Development,Implementation And Deployment, Prem A. Thilagar
Panda Monitoring - A System To Monitor High Performance Computing For The Atlas Experiment-Design, Development,Implementation And Deployment, Prem A. Thilagar
Computer Science and Engineering Theses - Archive
Grid resources are gaining wide importance in the wake of experiments such as ATLAS aiding in a bigger goal to understand the complexities of nature. The need for a good monitoring system is realized as grid resources are being implemented widely. This work is an analysis of the existing monitoring system of the Panda which is a grid middleware for the ATLAS experiment running in CERN. The thesis aims at identifying the key bottlenecks of the current monitor and speaks about the implementation of a new monitor for the same .The new monitor which is being designed with scalability and …
Sequences Of Bayes Gaussian Classifier, Jimy Shah
Sequences Of Bayes Gaussian Classifier, Jimy Shah
Electrical Engineering Theses - Archive
A new method for designing sequences of Bayes Gaussian Classifiers is presented in this thesis. First, a basic Bayes Gaussian Classifier is designed with an assumption of data being Gaussian. Then, we have used the Output Weight Optimization-Back Propagation (OWO-BP) technique to iteratively modify the coefficients of the classifier, resulting in less classification error. Through use of an iterative Gram-Schmidt procedure, to train linear functional link nets, input features are ordered from most useful to least useful. Another important development in this thesis is the generation of nested feature subsets. This ensures that the curve for error percentage versus the …
Embedded System For Monitoring Human Activities Using 3-Axis Accelerometer, Himabindu Yamana
Embedded System For Monitoring Human Activities Using 3-Axis Accelerometer, Himabindu Yamana
Electrical Engineering Theses - Archive
The last decade has witnessed a surge of interest in new sensing and monitoring devices for health care. In several medical and non-medical applications it is necessary to measure the human activities. Detection and monitoring of human activities requires the use of external sensors around the body. The reported design provides a systematic approach for characterization of states. The design employs a 3-axis accelerometer, a microcontroller and RS232 based communication protocol for sensing the activities of a person and the output will be seen on a PC with a graphical user interface. Experiments were conducted on human test subjects and …
A Discrete Event Based Stochastic Simulation Approach For Studying The Dynamics Of Biological Networks, Samik Ghosh
A Discrete Event Based Stochastic Simulation Approach For Studying The Dynamics Of Biological Networks, Samik Ghosh
Computer Science and Engineering Dissertations - Archive
With increasing availability of data resources on the molecular parts of a living cell, biologists are focusing on holistic understanding of cellular mechanisms and the emergent dynamics arising out of their complex interactions. Comprehending the fine-grained signal specificity, gene regulation and feedback mechanisms of molecular interactions at a network level forms a central theme of systems biology. With the speed and sophistication of computational methods, in silico modeling and simulation techniques have become a powerful tool for biologists challenged with understanding the system complexity of biological networks. Numerical simulation of classical chemical kinetics (CCK), agent-based simulations of biological processes, and …
The Effect Of Temperature On Fiber Composite Bridge Decks, Mahesh Gajula Nagabhushanam
The Effect Of Temperature On Fiber Composite Bridge Decks, Mahesh Gajula Nagabhushanam
Civil Engineering Theses - Archive
The use of Fiber composite honeycomb structure's as bridge decks gained importance, because of its low light weight and ease of installation. In this study, The Fiber composite bridge decks were subjected to thermal gradients. The Fiber composite bridge decks were fabricated in sizes of 2 feet x 8 feet x .5 feet and 4 feet x 8 feet x .5 feet specimens by Kansas structural composites Inc. The program consisted of 3 specimens of size 2 feet x 8 feet x .5 feet with ribs oriented along longitudinal direction, 3 specimens of size 2 feet x 8 feet x …
Deep Mixing Technology For Mitigation Of Swell-Shrink Behavior Of Expansive Soils Of Moderate To Deep Active Depths, Raja Sekhar Madhyannapu
Deep Mixing Technology For Mitigation Of Swell-Shrink Behavior Of Expansive Soils Of Moderate To Deep Active Depths, Raja Sekhar Madhyannapu
Civil Engineering Dissertations - Archive
Expansive soils are well known for their cyclic shrink-swell behavior due to seasonal related moisture changes. These cyclic movements of expansive soils are due to physico-chemical changes at particle level that are dependent on mineralogical composition of these soils. The subsoil depths susceptible to moisture changes are known as active zones and based on previous studies vary from shallow to deep depths. Movements from these active depths reflect to the surface and cause considerable damages to overlying infrastructures. These damages are slow and time dependent as the in situ moisture fluctuations are slow and continue with time. Since the current …
Resistivity And Hall Measurement In Semiconductor Heterostructures, Mohammed Salem
Resistivity And Hall Measurement In Semiconductor Heterostructures, Mohammed Salem
McNair Scholars Research Journal
No abstract provided.
Full Issue, The Mcnair Team
Cross-Layer Design For Wireless Ad Hoc Sensor Networks, Xinsheng Xia
Cross-Layer Design For Wireless Ad Hoc Sensor Networks, Xinsheng Xia
Electrical Engineering Dissertations - Archive
Cross-layer design is an efficient approach to enhance energy efficiency and Quality of Service (QoS) in wireless ad hoc sensor networks. This dissertation will focus on the cross-layer issues and approaches. It will also discuss the latency-aware and energy efficiency tadeoffs and the packets transmission in the rear part of the dissertation. Firstly, we will analyze the cross-layer design for wireless sensor networks based on the virtual MIMO techniques. We will coordinate the physical layer, the MAC layer and the network layer for cross-layer evaluation. Performance analysis and simulation results show that throughput and packet loss ratio will have different …
Measurement And Modeling Of 1/F Noise In Mosfet Devices With High-Κ Material As The Gate Dielectric, Tanvir Hasan Morshed
Measurement And Modeling Of 1/F Noise In Mosfet Devices With High-Κ Material As The Gate Dielectric, Tanvir Hasan Morshed
Electrical Engineering Dissertations - Archive
A new 1/f noise model has been developed for MOSFET devices with high-? gate stack. To investigate the impacts of nitridation, MOSFETs with nitrided high-? dielectric was used. These devices were provided by Texas Instruments, having four different interfacial layer thicknesses with a stack composition of SiON/HfSiON. The dominant mechanism affecting the noise behavior of these devices was experimentally determined to be correlated number and mobility fluctuation. The impact of remote phonon scattering was investigated in the temperature range of 172K to 300K. It has been observed that the mobility characteristics of these devices were significantly affected by remote phonon …
Acknowledgements, The Mcnair Team
Acknowledgements, The Mcnair Team
McNair Scholars Research Journal
No abstract provided.
Friends Of The Uta Library Mcnair Scholarship Awards, The Mcnair Team
Friends Of The Uta Library Mcnair Scholarship Awards, The Mcnair Team
McNair Scholars Research Journal
No abstract provided.