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2010

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Positively Invariant Sets In Sliding Mode Control Theory With Application To Servo Actuator System With Friction, Shibly Ahmed Dec 2010

Positively Invariant Sets In Sliding Mode Control Theory With Application To Servo Actuator System With Friction, Shibly Ahmed

Iraqi Journal of Computers, Communications, Control and Systems Engineering

In this paper two invariant sets are derived for a second order nonlinear affine system using a sliding mode controller. If the state started in these sets, it will not leave it for all future time. The invariant set is found function to the initial condition only, from which the state bound is estimated and used when determining the gain of the sliding mode controller. This step overcomes an arithmetic difficulty that consists of calculating suitable controller gain value that ensures the attractiveness of the switching manifold. Also, by using a differentiable form for the approximate signum function in sliding …

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A Lab View Based Data Acquisition System For Radial Temperature Distribution, Hazem I., Ali Farooq Lutfi, Ahmed Mudher Hassan Dec 2010

A Lab View Based Data Acquisition System For Radial Temperature Distribution, Hazem I., Ali Farooq Lutfi, Ahmed Mudher Hassan

Iraqi Journal of Computers, Communications, Control and Systems Engineering

Lab VIEW (Laboratory Virtual Instrument Engineering Workbench) is gaining its popularity as a graphical programming language especially for data acquisition and measurement. This is due to the vast array of data acquisition cards and measurement systems which can be supported by LabVIEW as well as the relative ease by which advanced software can be programmed. One area of application of LabVEW is in the measuring and analyzing of radial temperature distribution. This paper describes a LabVIEW based data acquisition and analysis developed specifically for radial temperature distribution. The temperature is simultaneously measured and displayed.

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Multi-Species On-Road Remote Sensing Of Vehicle Emissions In Van Nuys, California – August 2010, Gary A. Bishop, Brent G. Schuchmann, Donald H. Stedman Dec 2010

Multi-Species On-Road Remote Sensing Of Vehicle Emissions In Van Nuys, California – August 2010, Gary A. Bishop, Brent G. Schuchmann, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

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The Generation Of Domestic Electricity Load Profiles Through Markov Chain Modelling, Fintan Mcloughlin, Aidan Duffy, Michael Conlon Dec 2010

The Generation Of Domestic Electricity Load Profiles Through Markov Chain Modelling, Fintan Mcloughlin, Aidan Duffy, Michael Conlon

Articles

Micro-generation technologies such as photovoltaics and micro-wind power are becoming increasing popular among homeowners, mainly a result of policy support mechanisms helping to improve cost competiveness as compared to traditional fossil fuel generation. National government strategies to reduce electricity demand generated from fossil fuels and to meet European Union 20/20/20 targets is driving this change. However, the real performance of these technologies in a domestic setting is not often known as high time resolution models for domestic electricity load profiles are not readily available. As a result, projections in terms of reducing electricity demand and financial paybacks for these micro-generation …

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Autonomous Wireless Radar Sensor Mote For Target Material Classification, Muhammad Mahmudur Rahman Khan Dec 2010

Autonomous Wireless Radar Sensor Mote For Target Material Classification, Muhammad Mahmudur Rahman Khan

Electronic Theses and Dissertations Archive

An autonomous wireless sensor network consisting of different types of sensor modalities is a topic of intense research due to its versatility and portability.These types of autonomous sensor networks commonly include passive sensor nodes such as infrared,acoustic,seismic and magnetic.However,fusion of another active sensor such as Doppler radar in the integrated sensor network may offer powerful capabilities for many different sensing and classification tasks.In this work,we demonstrate the design and implementation of an autonomous wireless sensor network integrating a Doppler sensor into wireless sensor node with commercial off the shelf components.We also investigate the effect of different types of target materials …

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Variations In The Seismic Quality Factor Q For The Mississippi Embayment Sediments Utilizing Spectral Analysis Of Reflection Data, Michael Wilson Towle Dec 2010

Variations In The Seismic Quality Factor Q For The Mississippi Embayment Sediments Utilizing Spectral Analysis Of Reflection Data, Michael Wilson Towle

Electronic Theses and Dissertations Archive

A natural log spectral ratio technique is used to calculate Qp for the post-Paleozoic, unconsolidated sediments of the northern Mississippi Embayment. The method is applied to high-resolution marine seismic reflection data acquired along the Mississippi River. The method assumes a frequency independent Q over a certain frequency band. The frequency bands inspected range from 10-150 Hz and 10-200 Hz based on observed linear trends in the spectral ratio data. The large volume of data available allows for increased accuracy in Q estimates. Values of Qs are then approximated using an empirical Qp/Qs relationship for the embayment. Results show that average …

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Osteoblast Precursors Respond To Cyclic Mechanical Compressive And Tensile Strains At The Bone-Implant Interface, Andrew Phillip Noblett Dec 2010

Osteoblast Precursors Respond To Cyclic Mechanical Compressive And Tensile Strains At The Bone-Implant Interface, Andrew Phillip Noblett

Electronic Theses and Dissertations Archive

Stromals cells, W-20-17, were subjected to daily 30 minute doses of 800microstrain at 1Hz for six consecutive days on a commercially pure titanium substrate with a custom 4-point-bend cell strain system to simulate the bone-implant interface in vivo. The loading schemes include continuous and intermittent (15minutes of strain, 15 minutes of rest, 15 minutes of strain) dosing in both compresssive and tensile strain. Cell lysates and media were collected after 12hrs on the plate and after 1, 3, and 6 days of straining. DNA, total protein, and ALP concentrations were assayed to assess the results of the different strains. Overall …

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Signal Conditioning And Feature Estimation For Profiling Sensor Systems, Jeremy Benjamin Brown Dec 2010

Signal Conditioning And Feature Estimation For Profiling Sensor Systems, Jeremy Benjamin Brown

Electronic Theses and Dissertations Archive

This paper presents techniques for signal conditioning and feature estimation to be used for profiling sensors which perform broad scale classifications. Methods for improving existing feature estimation techniques for linear array profiling systems are provided. A 360 profiling system and the accompanying algorithms used for signal conditioning and feature estimation are presented. The algorithms are validated by demonstrating classification results for the broad scale human, animal, and vehicle three class problem for the linear array, and the human and animal two class problem for the 360 profiling sensor.

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"Daily Planet" Vs. "Daily Bugle": The Changing Depiction Of Journalism In American Comic Books, Andrew Alan Smith Dec 2010

"Daily Planet" Vs. "Daily Bugle": The Changing Depiction Of Journalism In American Comic Books, Andrew Alan Smith

Electronic Theses and Dissertations Archive

Journalists and journalism have always been popular vehicles for storytelling in comic books, as they are in other pop culture media. The more than 70 years of comic books in America have provided thousands of fictional journalists, especially in the superhero genre. Primary among these are the staffs of the Daily Planet at DCComics and the Daily Bugle at Marvel Comics. This content analysis -- utilizing hundreds of the original texts but also historical research and a questionnaire to significant creators -- shines a spotlight on a quantum shift in the depiction of journalists in comics. Until the introduction of …

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Stochastic Simulation Of Human Pulmonary Blood Flow Based On Anatomic And Elasticity Data, Jun Shi Dec 2010

Stochastic Simulation Of Human Pulmonary Blood Flow Based On Anatomic And Elasticity Data, Jun Shi

Electronic Theses and Dissertations Archive

In order to fully understand the function of the lungs, it is important to determine the transit time of the pulmonary circulation. However, a practical model to estimate the transit time is difficult to be found in literature, because of the high complexity of the whole pulmonary circulation system. This study developed a computing model of steady blood flow in human lungs based on detailed morphology and elasticity data by Huang et al (1996) [5], which incorporated a Diameter-Defined Strahler System to simulate a human lung branching system. A stochastic simulation approach was introduced. Considering Huang’s connectivity data between different …

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Not About Me: A Memoir, Candice Renee Baxter Dec 2010

Not About Me: A Memoir, Candice Renee Baxter

Electronic Theses and Dissertations Archive

A rebellious teenage girl with driving bravado and Southern manners gets pregnant and married, in that order, her senior year of high school, class of 1998. Through cinematic scenes like a shotgun wedding, struggling marriage, single motherhood, college and business career, the feisty narrator builds tension up to a climax. This is not just another triumphant story of teenage pregnancy set deep in the heart of the Bible belt. Not About Me: A Memoir is an approximately 47,000 word book-length example of what happens ten years later when young parents grow in separate directions but maintain a relationship for the …

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Emove: Movement Detection And Classification For Tagged Assets On Embedded Platforms, Bhagavathy Krishna Dec 2010

Emove: Movement Detection And Classification For Tagged Assets On Embedded Platforms, Bhagavathy Krishna

Electronic Theses and Dissertations Archive

Most of the existing real-time asset tracking systems involves frequent communication of a device placed on the object to be tracked with a fixed infrastructure, which rapidly depletes the battery of the tag, due to the high energy demand of communication. This thesis presents emove, a system implemented on a low cost tag node that can be attached to assets. An emove tag autonomously detects and classifies movement of assets while being in deep sleep mode for most of its life. It communicates with the infrastructure only when it confirms the movement detected is of interest. Our design emphasizes energy-efficient …

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Momentum-Space Engineering Of Gaseous Bose-Einstein Condensates, Mark Edwards, Brandon Benton, Jeffrey Heward, Charles W. Clark Dec 2010

Momentum-Space Engineering Of Gaseous Bose-Einstein Condensates, Mark Edwards, Brandon Benton, Jeffrey Heward, Charles W. Clark

Physics & Astronomy: Faculty Publications

We show how the momentum distribution of gaseous Bose-Einstein condensates can be shaped by applying a sequence of standing-wave laser pulses. We present a theory, whose validity was demonstrated in an earlier experiment [L. Denget al., Phys. Rev. Lett. 83, 5407 (1999)], of the effect of a two-pulse sequence on the condensate wavefunction in momentum space. We generalize the previous result to the case of N pulses of arbitrary intensity separated by arbitrary intervals and show how these parameters can be engineered to produce a desired final momentum distribution. We find that several momentum distributions, important in …

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Transient Fluid Flow Phenomena During Continuous Casting: Part Ii-Cast Speed Change, Temperature Fluctuation, And Steel Grade Mixing, Yufeng Wang, Lifeng Zhang Dec 2010

Transient Fluid Flow Phenomena During Continuous Casting: Part Ii-Cast Speed Change, Temperature Fluctuation, And Steel Grade Mixing, Yufeng Wang, Lifeng Zhang

Materials Science and Engineering Faculty Research & Creative Works

Many complicated phenomena are associated with transient stages during the continuous casting process, especially inside the casting mold cavity. a deep understanding of the phenomena and optimized control over the process ensure the high-quality product and low costs. This work presents a three-dimensional numerical simulation of transient fluid flow phenomena during steel continuous casting. in the Part II, the process of casting speed change (increase or decrease), temperature fluctuation, and steel grade mixing in a slab mold were investigated. the phenomena, such as flow pattern, inclusion removal fraction, temperature variation, top surface profile, and steel transportation, were addressed to evaluate …

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A Simple Model To Calculate Dendrite Growth Rate During Steel Continuous Casting Process, Mujun Long, Lifeng Zhang, Fei Lu Dec 2010

A Simple Model To Calculate Dendrite Growth Rate During Steel Continuous Casting Process, Mujun Long, Lifeng Zhang, Fei Lu

Materials Science and Engineering Faculty Research & Creative Works

In the current paper, the relationship between the casting speed and the dendrite growth during steel continuous casting process was studied; and a simple mathematical model to calculate the primary dendrite growth rate according to the casting speed was developed. the model was used to predict the distribution of the dendrite growth rate along width direction and casting direction during a continuous casting process, indicating a dendrite growth rate of 0.1-3.0 mm/s, which is much higher than that in regular ingot casting. the dendrite growth rate fluctuates along casting direction because of the different cooling intensity in each zone of …

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Reaction Dynamics In Double Ionization Of Helium By Electron Impact, Marcelo F. Ciappina, Michael Schulz, Tom Kirchner Dec 2010

Reaction Dynamics In Double Ionization Of Helium By Electron Impact, Marcelo F. Ciappina, Michael Schulz, Tom Kirchner

Physics Faculty Research & Creative Works

We present theoretical fully differential cross sections (FDCS) for double ionization of helium by 500 eV and 2 keV electron impact. Contributions from various reaction mechanisms to the FDCS were calculated separately and compared to experimental data. Our theoretical methods are based on the first Born approximation. Higher-order effects are incorporated using the Monte Carlo event generator technique. Earlier, we successfully applied this approach to double ionization by ion impact, and in the work reported here it is extended to electron impact. We demonstrate that at 500 eV impact energy, double ionization is dominated by higher-order mechanisms. Even at 2 …

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Need Singapore Fear Floating? A Dsge-Var Approach, Hwee Kwan Chow, Paul D. Mcnelis Dec 2010

Need Singapore Fear Floating? A Dsge-Var Approach, Hwee Kwan Chow, Paul D. Mcnelis

Research Collection School Of Economics

This paper uses a DSGE-VAR model to examine the managed exchange-rate system at work in Singapore and asks if the country has any reason to fear floating the exchange rate with a Taylor rule inflation-targeting mechanism that uses the short term interest rate instead of the exchange rate as the benchmark monetary policy instrument. Our simulation results show that the use of a more flexible exchange rate system will reduce volatility in inflation and investment but consumption volatility will increase. Overall, there are neither signi…cant welfare gains or losses in the regime shift. Given the highly open and trade …

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Xpath-Based Template Language For Describing The Placement Of Metadata Within A Document, Vijay Kumar Musham Dec 2010

Xpath-Based Template Language For Describing The Placement Of Metadata Within A Document, Vijay Kumar Musham

Computer Science Theses & Dissertations

In the recent years, there has been a tremendous growth in Internet and online resources that had previously been restricted to paper archives. OCR (Optical Character Recognition) tools can be used for digitalizing an existing corpus and making it available online. A number of federal agencies, universities, laboratories, and companies are placing their collections online and making them searchable via metadata fields such as author, title, and publishing organization. Manually creating metadata for a large collection is an extremely time-consuming task, and is difficult to automate, particularly for collections consisting of documents with diverse layout and structure. The Extract project …

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Energy Efficient Led Displays, John Mani Kumar Jupalli Dec 2010

Energy Efficient Led Displays, John Mani Kumar Jupalli

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this research work, an innovative pixel architecture RGBW, consisting of red (R), green (G), blue (B), and white (W) LEDs, is designed and implemented for color generation. Energy consumption of new pixel architecture consisting of RGBW LEDs is compared to standard architecture consisting of RGB LEDs. Human perception experiments are conducted to study the differences in perception between the two architectures when the same colors are generated using RGBW vs. RGB. Measurements of power for a 32inch x 16inch LED display has proved up to 18% power savings for low saturated colors, up to 8% for high saturated colors …

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Systematics And Molecular Phylogeny Of Two African Stem Borer Genera, Sciomesa Tams & Bowden And Carelis Bowden (Lepidoptera: Noctuidae), P. Moyal, B. Le Ru, D. Conlong, D. Cugala, B. Defabachew, T. Matama-Kauma, B. Pallangyo, J. Van Den Berg Dec 2010

Systematics And Molecular Phylogeny Of Two African Stem Borer Genera, Sciomesa Tams & Bowden And Carelis Bowden (Lepidoptera: Noctuidae), P. Moyal, B. Le Ru, D. Conlong, D. Cugala, B. Defabachew, T. Matama-Kauma, B. Pallangyo, J. Van Den Berg

All Peer-Reviewed Publications

Currently, the systematics of the African noctuid stem borers of the subtribe Sesamiina, which include major pests of cereals, is confused. In addition, their ecology is poorly known, as are the factors influencing their evolution. In this paper, we address these shortcomings for two genera of the Sesamiina, Sciomesa Tams & Bowden and Carelis Bowden. Mixed Bayesian phylogenetic analysis, which included their host plants and two mitochondrial genes, showed the genus Sciomesa to be polyphyletic. Two new genera were created, Pirateolea and Feraxinia. The genus Carelis proved to be paraphyletic and was subdivided into two sub-genera. The genera Sciomesa, Carelis …

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Site Verification Of Weigh-In-Motion Traffic And Tirtl Classification Data, Shuo Li, Yingzi (Eliza) Du, Yi Jiang Dec 2010

Site Verification Of Weigh-In-Motion Traffic And Tirtl Classification Data, Shuo Li, Yingzi (Eliza) Du, Yi Jiang

JTRP Technical Reports

Quality weigh-in-motion (WIM) traffic data is essential not only in general transportation application, but also in pavement design. The new AASHTO Mechanistic-Empirical Pavement Design Guide (MEPDG) for New and Rehabilitated Pavement Structures requires information on the detailed truck traffic, such as truck traffic volume, truck traffic monthly and hourly variations, vehicle class distribution, axle load, and axle load distributions, instead of the traditional ESALs. In addition, the Indiana Department of Transportation (INDOT) needs to collect traffic data frequently so as to timely provide accurate traffic information for planning, program development, operations, and pavement management. Currently, INDOT is using the pneumatic …

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Safety Enhancement Of The Indot Network Pavement Friction Testing Program: Macrotexture And Microtexture Testing Using Laser Sensors, Shuo Li, Samy Noureldin, Karen Zhu Dec 2010

Safety Enhancement Of The Indot Network Pavement Friction Testing Program: Macrotexture And Microtexture Testing Using Laser Sensors, Shuo Li, Samy Noureldin, Karen Zhu

JTRP Technical Reports

The Indiana Department of Transportation has conducted annual network inventory friction testing using the locked wheel trailer to reduce wet pavement crashes. However, issues have arisen concerning the data credibility and field operation safety on high-speed highway facilities. Some researchers have investigated the evaluation of pavement friction using macrotexture measurements and found the relationship between friction and macrotexture is extremely weak. Currently, macrotexture can be readily measured at highway speeds, but microtexture is evaluated using friction at low speeds from a surrogate device. Microtexture plays an important role in friction force. The evaluation of pavement friction from texture measurements will …

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Cfd Applications In Airship Design, Kevin Shields Dec 2010

Cfd Applications In Airship Design, Kevin Shields

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis examines the aerodynamic characteristics and flight dynamics of a lighter-than-air airship using analytical and computational fluid dynamics (CFD). Modern airships have frequently been proposed for military operations; one of which, designated YEZ-2A, was a prototype whose design was initiated during the 1980's. Designs were evaluated through the wind tunnel tests of a 1:75 scaled model performed by Gomes. His tests relied on surface roughening techniques to compensate for the inability to maintain Reynolds number similarity among scales.;Later, the scaled prototype would receive further attention during a CFD study at WVU. This study was undertaken to numerically simulate the …

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Hardware, Software, And Low-Level Control Scheme Development For A Real-Time Autonomous Rover, Brenton K. Wilburn Dec 2010

Hardware, Software, And Low-Level Control Scheme Development For A Real-Time Autonomous Rover, Brenton K. Wilburn

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this research is to develop a low-cost autonomous rover platform for experiments in autonomous navigation. This thesis describes the design, development, and testing of an autonomous rover platform, based on the commercial, off-the-shelf Tamiya TXT-1 radio controlled vehicle. This vehicle is outfitted with an onboard computer based on the Mini-ITX architecture and an array of sensors for localization and obstacle avoidance, and programmed with Matlab/SimulinkRTM Real-Time Workshop (RTW) utilizing the Linux Real-Time Application Interface (RTAI) operating system.;First, a kinematic model is developed and verified for the rover. Then a proportional-integral-derivative (PID) feedback controller is developed for translational …

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Time Tracking System, Varun Ambati Dec 2010

Time Tracking System, Varun Ambati

Masters Theses & Doctoral Dissertations

Time Tracking System is a powerful, yet extremely easy-to-use time management and customer billing application. Time Tracking is an ideal solution for the Organization who needs to know how much time they spent on certain projects and how many hours they need to bill their clients for. Time tracking benefits organization as it maintains detailed statistics on whom and how spends the time on one or several projects, know how profitable the projects were for a certain client. The people who will benefit greatly from using Time Tracking are Software Developers, Web Designers, Project Managers, QA Specialist, Technical Support Specialists, …

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Characterization Of Acetogenic And Methanogenic Leachates Generated From A Sanitary Landfill Site, Aik Heng Lee, Hamid Nikraz, Yung Tse Hung Dec 2010

Characterization Of Acetogenic And Methanogenic Leachates Generated From A Sanitary Landfill Site, Aik Heng Lee, Hamid Nikraz, Yung Tse Hung

Civil and Environmental Engineering Faculty Publications

Decomposition processes take place in landfill generate leachates that can be categorized mainly of acetogenic and methanogenic in nature. BOD:COD ratio computed in this study for a landfill site over a 3 years duration revealed as a good indicator to identify acetogenic leachate from methanogenic leachate. Correlation relationships to predict pollutant level taking into consideration of climatic condition are derived.

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The Effectiveness Of Silica Sand In Semi-Aerobic Stabilized Landfill Leachate Treatment, Ezlina Othman, Mohd Suffian Yusoff, Hamidi Abdul Aziz, Mohd Nordin Adlan, Mohammed J.K. Bashir, Yung Tse Hung Dec 2010

The Effectiveness Of Silica Sand In Semi-Aerobic Stabilized Landfill Leachate Treatment, Ezlina Othman, Mohd Suffian Yusoff, Hamidi Abdul Aziz, Mohd Nordin Adlan, Mohammed J.K. Bashir, Yung Tse Hung

Civil and Environmental Engineering Faculty Publications

© 2010 by the authors. This study examines the suitability of natural silica sand as a low-cost adsorbent for the removal of ammoniacal nitrogen and heavy metals, particularly iron and zinc, from semi-aerobic stabilized landfill leachate. Leachate samples were collected from the Pulau Burung landfill site (PBLS) in Penang, Malaysia. The above-mentioned contaminants are highlighted in this study because of their unsafe concentrations at PBLS. The effects of shaking time, settling time, and silica sand dosage on the study parameter removal efficiencies were investigated to predict the performance of the process. The adsorptions of ammoniacal nitrogen, iron, and zinc were …

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A Study Of The Effect Of Vibration On Railroad Bearing Temperature, Bertha Alicia Gonzalez Dec 2010

A Study Of The Effect Of Vibration On Railroad Bearing Temperature, Bertha Alicia Gonzalez

Theses and Dissertations - UTB/UTPA

An on-track collaborative field test and laboratory experiments were conducted in order to determine the relationship between abrupt rises in surface temperature of a railroad bearing and vibration signatures captured during the experiments. The collaborative field test was conducted in order to investigate the root cause for this abrupt temperature change known as bearing temperature trending. The research presented in this thesis will show that temperature trending is correlated to an increase in the magnitude of vibration within the bearing and the fundamental frequencies that are generated by the internal components of a rotating bearing assembly. Distinct vibration mechanisms are …

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Photolithographic Fabrication Of 3d Penrose-Like Quasi-Photonic Crystal Polymeric Templates Utilizing Lab-Made Phasemask, Faraon Torres-Lazos Dec 2010

Photolithographic Fabrication Of 3d Penrose-Like Quasi-Photonic Crystal Polymeric Templates Utilizing Lab-Made Phasemask, Faraon Torres-Lazos

Theses and Dissertations - UTB/UTPA

Photonic crystals (PhC) have recently become of great interest because of their potential as replacement of electronics and/or supplement to semiconductors technology. The PhC’s capability to make compact integrated optical circuits has already made possible the laboratory manufacture of an array of different types of optical waveguides, cavities and filters. The work presented here aimed to simultaneously fabricate a 3D-PhC templates employing six-beam holographic lithography. The basic procedures included recording gratings using interference field of laser sources in a photoresist coating on a glass substrate. The manufacturing method utilized only one optical element, a phasemask, drastically reducing the complexity of …

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Context Versus Rote Learning In The Martial Arts, Pearson F. Klein Dec 2010

Context Versus Rote Learning In The Martial Arts, Pearson F. Klein

Theses and Dissertations - UTB/UTPA

Research has shown that when learning martial arts katas, adults retained the information better “when the katas were taught with the context method than when the katas were taught with the no context method.” (Tovar, M.) It is imperative more experimentation be performed in this area because the findings do not relate to the population of children. Children between ages seven and twelve were instructed in two original katas utilizing two methods of instruction. First the katas with context were taught and then the other taught was purely based on rote completion of the sequential movements. Every subject was tested …

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