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Full-Text Articles in Engineering

Evaluation And Use Of Regenerative Multi Electrode Interfaces In Peripheral Nerves, Vidhi Desai Jan 2014

Evaluation And Use Of Regenerative Multi Electrode Interfaces In Peripheral Nerves, Vidhi Desai

Bioengineering Dissertations - Archive

Peripheral nerves offer unique accessibility to the innate motor and sensory pathways that can be interfaced with high degree of selectivity for intuitive and bidirectional control of advanced upper extremity prosthetic limbs. Several peripheral nerve interfaces have been proposed and investigated over the last few decades with significant progress made in the area of sensory feedback. However, clinical translation still remains a formidable challenge due to the lack of long term recordings. Prominent causes include signal degradation, eventual interface failures, and lack of specificity in the low amplitude nerve signals. This dissertation evaluates the capabilities of the newly developed Regenerative …

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Rainfall Induced Distress In Low Volume Pavements, Mahsa Hedayati Jan 2014

Rainfall Induced Distress In Low Volume Pavements, Mahsa Hedayati

Civil Engineering Dissertations - Archive

Annual expenses of distresses caused by volume change of expansive soils induce significant financial burden on maintenance authorities. The problems occur as the expansive soils within the unsaturated zone of the soil experience variation in moisture content. Swelling and shrinkage of the soils causes structural cracks, malfunction of piping and irrigation systems and loss of support for ground slabs. Due to their low stiffness, light loading and extensive construction, pavements are particularly vulnerable to the effects of expansive soils. Accurate understanding of behavior of expansive subgrade, interaction of subgrade pavement structure and incorporation of the results in design processes can …

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Development Of A Simplified Analytical Method To Estimate The Seismic Response Of Reinforced Concrete Frames With Solid Masonry Infills, Austin Reese Jan 2014

Development Of A Simplified Analytical Method To Estimate The Seismic Response Of Reinforced Concrete Frames With Solid Masonry Infills, Austin Reese

Civil Engineering Theses - Archive

This thesis discusses the analysis of the lateral force-vs-drift relation of reinforced concrete (RC) frames with masonry infill panels under in-plane lateral loads. Such structures have been the topic of several studies due to their recurring catastrophic failures during seismic events. Due to the large number of variables that can affect their seismic performance and lead to various possible failure mechanisms there is no widely accepted method for the assessment of the structural behavior of infilled frames under seismic loads. A parametric study was performed here using detailed analytical models which provided insight to the influence of the various design …

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Enhancing Effectiveness Of Aashto Type Prestressed Concrete Bridge Girder Through Fiber Reinforced Polymer Strengthening, Farzia Haque Jan 2014

Enhancing Effectiveness Of Aashto Type Prestressed Concrete Bridge Girder Through Fiber Reinforced Polymer Strengthening, Farzia Haque

Civil Engineering Theses - Archive

Fiber-reinforced polymers (FRP) are newly used materials by structuralengineers compared to concrete, steel, and wood. One area in which FRP is being used more and more is the strengthening of structurally deficient concrete bridges. FRP strengthening of the bridge girder improves flexural, shear, corrosion, seismic, and impact resistance. ACI 440 committee report outlined design procedure for flexure, shear, axial force, and combined axial and bending forces based on the available research, which are considered to be conservative and also pointed out the areas that still require research. Besides experimental, analytical, and field tests finite element analysis of FRP strengthened structural …

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Pavement Performance Monitoring Using Dynamic Cone Penetrometer And Geogauge During Construction, Ahmed Nawal Ahsan Jan 2014

Pavement Performance Monitoring Using Dynamic Cone Penetrometer And Geogauge During Construction, Ahmed Nawal Ahsan

Civil Engineering Theses - Archive

Proper design life of road network system requires adequate quality control measures during the construction process to ensure proper material quality and sufficient strength in between the materials. Laboratory tests are often time consuming and sometimes, are not practical while the construction work is going on, in-situ techniques can efficiently evaluate the material properties through simple and less time consuming procedures. Dynamic Cone Penetrometer and Geogauge can play a vital role as an in-situ testing equipment because both have the potential to measure the change in material properties through field tests being performed in the field. Both in-situ techniques was …

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Development Of Trans-Rectal Ultrasound (Trus) Coupled Diffuse Optical Tomography (Dot) For Prostate Cancer Imaging, Venkaiah Chowdary Kavuri Jan 2014

Development Of Trans-Rectal Ultrasound (Trus) Coupled Diffuse Optical Tomography (Dot) For Prostate Cancer Imaging, Venkaiah Chowdary Kavuri

Bioengineering Dissertations - Archive

Prostate cancer is one of the leading causes among cancer deaths in men in the United States. A minimally invasive real time searching tool for cancer need to be developed, which can enhance the odds of cancer detection; Current diagnostic techniques such as Trans-rectal ultrasound (TRUS) suffers from low sensitivity and specificity. The goal of the dissertation is to develop a Trans-Rectal Ultrasound (TRUS) coupled Diffuse Optical Tomography (DOT) probe that can detect and image prostate cancer. To accomplish the task, an optical clip-on probe has been designed that can incorporate the existing ultrasound probe and can pass through the …

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Biliary Tract Differentiation Through Use Of Visible To Nir Hyperspectral Reflectance Imaging, Eleanor F. Wehner Jan 2014

Biliary Tract Differentiation Through Use Of Visible To Nir Hyperspectral Reflectance Imaging, Eleanor F. Wehner

Bioengineering Dissertations - Archive

Cholecystectomies are one of the most common surgeries performed in the United States, and most of the complications which arise from these are injuries to the common bile duct (CBD) resulting from a misidentification of anatomy. Reflectance hyperspectral imaging (HSI) offers a low-cost, non-invasive tool to record superficial chemical spectra of a field of view in many surgical applications. A NIR DLP HSI system is assembled and characterized, and used to gather preliminary CBD reflectance HSI data cubes. NIR hyperspectral imaging (760 nm to 1600 nm) with the DLP HSI system proves ineffectual, so CBD reflectance hyperspectral data collection progresses …

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Mri Assessment Of Brain Vascular Reactivity To Physiological Challenges, Binu Panjikattil Thomas Jan 2014

Mri Assessment Of Brain Vascular Reactivity To Physiological Challenges, Binu Panjikattil Thomas

Bioengineering Dissertations - Archive

With a growing need for specific biomarkers in vascular diseases, the past decade has seen a surging interest in mapping brain vascular reactivity. There is great potential that this CVR mapping can be added to standard clinical MRI protocol, but before this is achieved, we need to better understand the mechanism of BOLD signal change to physiological challenges. A signal increase in the BOLD image is usually seen to CO₂ inhalation, but there are reports of negative CVR as well, i.e. decrease in BOLD signal during inhalation of CO₂ gas. Negative CVR is usually seen in patients with vascular occlusions, …

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High Speed Real-Time Embedded System For Pavement Texture Measurements, Sachin Jayaram Jan 2014

High Speed Real-Time Embedded System For Pavement Texture Measurements, Sachin Jayaram

Electrical Engineering Theses - Archive

The Texas Department of Transportation (TxDOT) collects road profile data from the state highway network and processes the same in order to determine the various anomalies on the road surface. These factors can adversely affect the characteristics and performance of the vehicle such as skid, fuel consumption, ride comfort, safety and tire wear. The International Roughness Index (IRI) and Mean Profile Depth (MPD) are the statistics used for quantifying ride and texture. Pavement texture is of particular importance as it can affect skidding in wet weather conditions. This thesis mainly focuses on the development and implementation of a real-time embedded …

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Application Of Openmp In Complexity Reduction Of Inter Frame Coding In Hevc, Karthik Suresh Jan 2014

Application Of Openmp In Complexity Reduction Of Inter Frame Coding In Hevc, Karthik Suresh

Electrical Engineering Theses - Archive

The International Telecommunication Union (ITU-T), Video Coding Experts Group (VCEG) and the ISO/IEC Moving Picture Experts Group (MPEG) standardization organizations working in a partnership known as the Joint Collaborative Team on Video Coding (JCT-VC) came up with the latest video project known as the High Efficiency Video Coding (HEVC) standard. This standard, also known as the H.265 standard, is based on the same architecture as that of the more widely implemented H.264/AVC (Advance Video Coding). The HEVC has incorporated many improvements like increased bitrate reduction, increased coding efficiency [7] and compression efficiency, but, at the cost of increased complexity. The …

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Physical Human Robot Interaction Using Model Reference Neuroadaptive Control, Shaikh Md Rubayiat Tousif Jan 2014

Physical Human Robot Interaction Using Model Reference Neuroadaptive Control, Shaikh Md Rubayiat Tousif

Electrical Engineering Theses - Archive

In this work Physical Human-Robot Interaction (pHRI) related problems are addressed as a part of the research going on in Assistive Robotics in the University of Texas Research Institute (UTARI). A novel model reference Neuroadaptive controller is designed based on existing technology of Lewis et al. Adaptive impedance control is an important method for force/motion control of robotic systems. Most of the work in adaptive impedance control makes the error dynamics of the system to look like a prescribed model. By contrast, this work does not want the error dynamics to be prescribed as an impedance model. It makes the …

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Gpio Design, Layout, Simulation And Esd Clamp Placement Calculator, Shiju Abraham Jan 2014

Gpio Design, Layout, Simulation And Esd Clamp Placement Calculator, Shiju Abraham

Electrical Engineering Theses - Archive

Input/Output (IO) circuits enable interface between logic circuitry and the actual or raw information to be processed. They also help to isolate the integrated circuit from the unsafe, unknown and noisy environment. IOs come in many flavors and the General Purpose IO (GPIO) is one among them. GPIOs can operate as an input, output or a bi-directional circuit. The purpose of this work is to design an area optimized industrial quality bi-directional GPIO with separate enable signal for transmitter and receiver which can drive a current of at least 16 mA into the PAD (the circuit point where the capacitive …

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Multiplexing And Demultiplexing Hevc Video And Aac Audio And Achieving Lip Synchronization During Playback, Mrudula Balmohan Warrier Jan 2014

Multiplexing And Demultiplexing Hevc Video And Aac Audio And Achieving Lip Synchronization During Playback, Mrudula Balmohan Warrier

Electrical Engineering Theses - Archive

High efficiency video coding (HEVC) /H.265 , is the latest digital video coding standard which has proven to be superior to earlier standards in terms of compression ratio, quality and error resilience. In order for the end user to understand the video meaningfully, there should be an associated audio with it. Any video is incomplete without a proper audio. Advanced audio coding (AAC) is the digital audio codec standard defined in MPEG-2 and later in MPEG-4 with few changes. The audio quality of an AAC stream is widely used as the audio coding standard in various applications. It would be …

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The Evaluation Of Rf Channel Impairments And Co-Channel Interfrence Over Rician Fading Channel, Zhaoheng Luo Jan 2014

The Evaluation Of Rf Channel Impairments And Co-Channel Interfrence Over Rician Fading Channel, Zhaoheng Luo

Electrical Engineering Theses - Archive

The mobile network system has evolved into its 4th generation and the demand of faster data rate, higher network coverage and reliable communication has never stop. In order to have more bandwidth and reduce power consumption, more and more new transmitting and receiving devices has been developed to achieve the goal. However, during this evolution, the performance of the system is suffering from effects by the radio-frequency (RF) circuit design, which produces DC offset, in-phase and quadrature (IQ) imbalance and phase noise. Also, in cellular mobile communication system, signals from different sources can be using the same frequency spectrum, and …

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Public Private Partnership Pitfalls In Toll Roads, Mahran Maher Zatar Jan 2014

Public Private Partnership Pitfalls In Toll Roads, Mahran Maher Zatar

Civil Engineering Theses - Archive

Public-Private Partnership (PPP) has been one of the most effective concepts in developing infrastructure projects. By bringing in creative skills and management efficiency from business practice, private companies can potentially improve efficiency and productivity in implementation of major capital projects and provide an effective approach to meet project objectives. The main idea behind the partnership in toll roads delivery is putting together the strengths of both public and private sectors in order to provide services in the most cost-effective manner, on time, and with the highest quality. However, the criteria on which governments judge the "success" of PPP projects is …

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Development Of Linear Regression Model For Predicting Water Quality Parameters From Anaerobic Treatment Of Vinasse, Shammi Rahman Jan 2014

Development Of Linear Regression Model For Predicting Water Quality Parameters From Anaerobic Treatment Of Vinasse, Shammi Rahman

Civil Engineering Dissertations - Archive

One of the most prominent biofuels today is ethanol. The production of ethanol from biomass, whether from sugar crops, starch crops, dairy products, or cellulosic materials, results in the production of a high-strength liquid waste called vinasse. Approximately 12 liters of vinasse are produced for every 1 liter of ethanol. Vinasse is high in solids and organic content, with biochemical oxygen demand (BOD) ranging from 30 to 40 g/L, and a low pH, typically from 3-5. Traditionally, in countries such as India, Brazil, and other Latin American countries, vinasse has been disposed of by applying it as a fertilizer on …

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Target Detection And Cognitive Radio Capacity Analysis Based On Sensor Networks, Ishrat Maherin Jan 2014

Target Detection And Cognitive Radio Capacity Analysis Based On Sensor Networks, Ishrat Maherin

Electrical Engineering Dissertations - Archive

In this dissertation we studied two topics which are focused on target detection through foliage and capacity analysis of cognitive radio. We propose a multi-step information theory based scheme for target detection through foliage, using ultra wide-band (UWB) radar sensor network (RSN). This method is motivated by the fact that echoes from the stationary target, obscured by foliage, are more random than the region without the target. This is resolved by three steps of information fusion. Information fusion and integration is the process of combining data from several radar sensors and can achieve results that are not possible by individual …

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Identification Of The Interdependence Of Aging And Internal Pressure Evolution Of Commercial Li-Ion Cells, Anthony Matasso Jan 2014

Identification Of The Interdependence Of Aging And Internal Pressure Evolution Of Commercial Li-Ion Cells, Anthony Matasso

Electrical Engineering Dissertations - Archive

The demand for high power and energy coupled with long cycle life, low cost, and increased safety have become the driving factors in the development of lithium-ion batteries. This demand continues to expand with the sustained capability expansion of high power military applications, electric vehicles, grid-tie energy storage, and other renewable energy applications. Unlike the short innovation cycles that technologies like portable electronics experience, these applications are focused on an affordable long term product lifecycle that is safe. In order to achieve these long term goals, a better understanding of the chief degradation mechanisms as well as a more sophisticated …

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Some Considerations Of Performance And Capacity Of Voice Over Ip High Bit Rate Wireless Reverse Links, Richard Framjee Jan 2014

Some Considerations Of Performance And Capacity Of Voice Over Ip High Bit Rate Wireless Reverse Links, Richard Framjee

Electrical Engineering Dissertations - Archive

Evaluation of the performance and capacity of the wireless reverse links, that support concurrent voice over IP and packet data services, is important for spectral efficiency considerations. For a given traffic mix, this capacity is the maximum Erlangs and data throughput at a given packet error rate, voice packet expected wait time and probability of wait time outage. The voice packet wait times are traffic induced and due to retransmissions caused by high packet error rate. In this dissertation the error rate of high bit rate DS-SS BPSK RAKE receivers and traffic induced expected packet wait time for voice over …

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Molecular And Textural Surface Engineering For Biological Sensing, Mohammed Arif Iftakher Mahmood Jan 2014

Molecular And Textural Surface Engineering For Biological Sensing, Mohammed Arif Iftakher Mahmood

Electrical Engineering Dissertations - Archive

This research work was aimed at finding novel approaches for early cancer detection. In cancer diagnosis, the candidate molecules largely include free DNA, related proteins and tumor cells, listed in increasing order of size. The list is also commonly accepted as early precursor of the disease where DNA and proteins are available in patients' blood earlier and the cell starts to appear in relatively later stage. The ratio of these molecules to the background matter is extremely small. To make detection more difficult, these molecules, once dislodged from their primary location, get cleared fast. These factors call for extremely sensitive …

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Fast Intra Mode Decision In High Efficiency Video Coding, Harshdeep Brahmasury Jain Jan 2014

Fast Intra Mode Decision In High Efficiency Video Coding, Harshdeep Brahmasury Jain

Electrical Engineering Theses - Archive

In this thesis a CU early termination algorithm with a fast intra prediction algorithm is proposed that terminates complete full search prediction for the CU and replaced by CU early termination algorithm which determines the complexity of the CU block then on sent decision is made to further split or non-split the CU. This is followed by a PU mode decision to find the optimal modes prediction mode from 35 prediction modes. This includes a two-step process: firstly calculating the Sum of Absolute Differences (SAD) of all the modes by down sampling method and secondly applying a three step search …

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Encoder Complexity Reduction With Selective Motion Merge In Hevc, Abhishek Hassan Thungaraj Jan 2014

Encoder Complexity Reduction With Selective Motion Merge In Hevc, Abhishek Hassan Thungaraj

Electrical Engineering Theses - Archive

The High Efficiency Video Coding (HEVC) standard is the latest video coding project developed by the Joint Collaborative Team on Video Coding (JCT-VC) which involves the International Telecommunication Unit (ITU-T) Video Coding Experts Group (VCEG) and the ISO/IEC Moving Pictures Experts Group (MPEG) standardization organizations. The HEVC standard is based on the previous widely used H.264/AVC (Advance Video Coding) standard but includes many new tools and improvements in different key areas which has resulted in achieving a 50% bitrate reduction compared to its predecessor amidst maintaining the same visual quality at a cost of increased complexity.Among the different vital blocks …

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Computational Modeling Of Drug Release From Nerve Guide Conduit Of Different Designs, Lokesh Shamkant Patil Jan 2014

Computational Modeling Of Drug Release From Nerve Guide Conduit Of Different Designs, Lokesh Shamkant Patil

Bioengineering Theses - Archive

Currently there are limited effective strategies and surgical methods for repairing gap peripheral nerve injuries. Autografts are commonly used but with major limitation in the availability of donor graft material and the painful sensations at donor site. These limitations call for the development of new, effective methods for repairing peripheral nerve injuries. The use of nerve guide conduits to facilitate nerve growth and repair have shown promising potential with minimum side-effects but still with limited success in a full functional recovery. The likely clinical outcome could benefit significantly with the use of engineering methodologies in the design, fabrication, surgical delivery …

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Cross Wavelet Analysis Of Cerebral Hemodynamics In Young And Older Adults, Mrunmayee Sunil Gandhi Jan 2014

Cross Wavelet Analysis Of Cerebral Hemodynamics In Young And Older Adults, Mrunmayee Sunil Gandhi

Bioengineering Theses - Archive

Measurement of cerebral autoregulation is important for the evaluation of a number of clinical disorders that affect cerebral blood flow. Cerebral autoregulation is a mechanism that involves dilation and constriction in arterioles to maintain relatively stable cerebral blood flow in response to changes of systemic blood pressure. Traditional assessments of autoregulation focus on the changes of cerebral blood flow velocity in response to large blood pressure fluctuations induced by interventions. This approach is not feasible for patients with impaired autoregulation or cardiovascular regulation. Therefore in this thesis, a non-stationary time-frequency analysis method, Cross Wavelet Transform is used, which assess autoregulation …

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Simulation Feasibility Studies Of A High Density Fnirs Imaging System, Pallavi Natekar Jan 2014

Simulation Feasibility Studies Of A High Density Fnirs Imaging System, Pallavi Natekar

Bioengineering Theses - Archive

Functional near infrared spectroscopy (fNIRS) is a technique that enables monitoring brain function, by detecting changes in near-infrared light absorbance resulting from changes in brain hemodynamics during periods of rest and activation. Although the technique has some advantages over other conventional functional imaging methods with its inherently high temporal sampling and detection sensitivity, the sparse spatial sampling of current fNIRS systems limits spatial resolution and requires help from Magnetic Resonance Imaging (MRI) to attain spatial co-registration with anatomical structures. In this work we have performed simulations to test the feasibility of using a high density spatial sampling system as a …

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Evaluating The Impact Of Auto Id Technologies On Oil And Gas Erp System Data Accuracy And Reliability, Gowthaman Ananta Krishnan Jan 2014

Evaluating The Impact Of Auto Id Technologies On Oil And Gas Erp System Data Accuracy And Reliability, Gowthaman Ananta Krishnan

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

Most of Enterprise Resource Planning (ERP) systems currently use manual entry or mass upload methods to enter data collected from warehouse operations. These methods are highly unreliable and prone to manual error affecting the data accuracy. Data accuracy and accurate real-time data are required by businesses for many critical decisions. Unreliable data becomes invalid and have a negative performance impact on ERP systems that can lead to economic loss to the organization. Automatic Identification (Auto-ID) technologies are used to track and collect data in real time or near real time. They can be integrated into ERP systems automatically to provide …

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Thermo-Mechanical Feasibility Study Of Copper And Gold Wirebonds In 3d Electronic Package, Gaurang Naware Jan 2014

Thermo-Mechanical Feasibility Study Of Copper And Gold Wirebonds In 3d Electronic Package, Gaurang Naware

Mechanical and Aerospace Engineering Theses - Archive

3 Dimensional (3D) Electronics Packaging has emerged as a revolutionary trend in the micro-electronics industry. It has made possible cost-effective system integration and size scaling while reducing the interconnect delay. The ever increasing demand for better mechanical, thermal, electrical performance, improved reliability and cost effective semiconductor manufacturing technology has encouraged the engineers to replace Gold (Au) by Copper (Cu). In a survey conducted by Semiconductor Equipment and Materials International, to study the industry mood related to wirebond technology, it was observed that 72% of the leading semiconductor companies are considering switching to Cu [1]. The only major concern regarding the …

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Fabrication Of Superhydrophobic Polystyrene Surfaces With Tunable Adhesion By Modulating Strain Recovery Temperature, Prasha Sarwate Jan 2014

Fabrication Of Superhydrophobic Polystyrene Surfaces With Tunable Adhesion By Modulating Strain Recovery Temperature, Prasha Sarwate

Mechanical and Aerospace Engineering Theses - Archive

In this work, different superhydrophobic structures were fabricated on the surfaces of polystyrene (PS) blocks, using oxygen reactive ion etch (ORIE) and controllable strain recovery. The PS used here is a thermal shape memory polymer (SMP). Microhills are first generated on the surface of a PS block by ORIE. The PS block is then heated up, which triggers the strain recovery. During this process of recovering its original shape, the PS block gradually reduces its lateral dimensions, while increasing its thickness. Using different recovery temperatures, the surface morphologies can be controlled, which provides an approach to adjust surface wetting properties, …

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An Investigation Of Durability And Reliability Of Hdpe Pipe For Large Diameter Water Transmission Applications, Divyashree Jan 2014

An Investigation Of Durability And Reliability Of Hdpe Pipe For Large Diameter Water Transmission Applications, Divyashree

Civil Engineering Theses - Archive

The drinking water infrastructure in the North America requires a durable and reliable water transmission pipe material. Thus, it is important to study pipe performance, so that water utilities can benefit from cost-effective and efficient pipe installations and longer design life. All pipe materials deteriorate overtime and every pipe has unique properties with advantages and limitations. During a pipe's life cycle, failures occur due to numerous factors such as age, loading conditions, environmental conditions, installation quality, manufacturing procedures, operation and maintenance strategies and so on. The fatigue performance under cyclic loading in conducted, since very limited information is available on …

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Comparison Of Deflection Measurement Methods Of Large Diameter Steel Pipes With Control Low Strength Material, Saman Farrokhi Gozarchi Jan 2014

Comparison Of Deflection Measurement Methods Of Large Diameter Steel Pipes With Control Low Strength Material, Saman Farrokhi Gozarchi

Civil Engineering Theses - Archive

This study investigates the structural integrity of large diameter (108 inch) steel pipes with mortar lining embedded with Controlled Low Strength Material (CLSM) during installation. Field tests were carried out in the prove-out section of line J which is a 2 mile (3.21 km) section of an Integrated Pipeline network (IPL) that will ultimately run a length of 150 mile (241.4 km) from Lake Palestine to Lake Benbrook. The prove-out is a section of line J that was used for experimental research for the use of CLSM as an embedment material and calibrate Finite Element Method (FEM) model for the …

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