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Stable Reference Trajectory Modification For Handling Actuator Failure In Control Systems, Ifeolu Olalekan Ogunleye Jan 2011

Stable Reference Trajectory Modification For Handling Actuator Failure In Control Systems, Ifeolu Olalekan Ogunleye

Mechanical and Aerospace Engineering Theses - Archive

The issue of rapidly reconfiguring the reference trajectory under unanticipated actuator failures in order to regain lost performance or aircraft handling qualities is explored. The failures detected in real-time are compensated for by ensuring the input to the system reflects current system conditions. This thesis will also show that only the general structure of the failed system component is needed to achieve successful failure detection and reference trajectory reconfiguration. This approach allows the nominal control structure to remain unchanged in the presence of change flight and system conditions. Acceptable system performance is recovered by detecting the actuator failures in real-time. …

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Screening For Adolescent Depression In The Primary Care Setting Using The Ces-Dc, Sharolyn Dihigo Jan 2011

Screening For Adolescent Depression In The Primary Care Setting Using The Ces-Dc, Sharolyn Dihigo

Doctor of Nursing Practice (DNP) Scholarly Projects - Archive

Refer to the document.

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Socioeconomic Background And Parental Values: An Examination Of Approaches To Bureaucratic Discretion At The Street-Level, Jesse R. Booher Jan 2011

Socioeconomic Background And Parental Values: An Examination Of Approaches To Bureaucratic Discretion At The Street-Level, Jesse R. Booher

Public Affairs Theses - Archive

Scholarly literature on policy implementation at the street-level generally focuses on how workers act in response to external pressures. Pressures can include policy rules, organizational culture, and the identities of the clients. Academia has produced scant work, however, examining how the identities and backgrounds of street-level bureaucrats influence their approach to the discretion inherent in their jobs. This study seeks to fill that literary gap. Using semi-structured interviews with street-level bureaucrats in North Texas, the study yields two strong relationships. First, a relationship exists between the participants' socioeconomic backgrounds as children and how they approach discretion inherent to street-level bureaucracy. …

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Cultural And Historic Preservation Planning In Small Cities And Suburbs: A Study Of A Cultural Asset Inventory Of Kennedale, Texas, Gregory S. Collins Jan 2011

Cultural And Historic Preservation Planning In Small Cities And Suburbs: A Study Of A Cultural Asset Inventory Of Kennedale, Texas, Gregory S. Collins

Public Affairs Theses - Archive

This thesis examines how smaller communities, which often lack the financial resources and the so-called "high culture" or marketable culture found in larger cities, can overcome challenges and develop cultural and historic preservation programs that perform the social function of unifying a community while also providing economic development opportunities that are connected to the community. The paper discusses "authenticity," and how this stated goal of city planners is actually a complex and contested concept rather than an objective standard that can be used to evaluate cultural planning programs. The paper reviews a number of cultural planning methods discussed in the …

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When Religion And Organization Conflict, John Larosa Jan 2011

When Religion And Organization Conflict, John Larosa

Communication Theses - Archive

After the terrorist attacks of 9/11, the United States became a much different place to live and work for Muslim-Americans. Muslims are one of most discriminated, misunderstood, and feared groups in the US. This qualitative study used survey questionnaires to explore the potential role conflicts in the workplace faced by Muslim-Americans as they navigate their way through a post 9/11 world. In the workplace, Muslim-Americans are very aware of how they are viewed by other Muslims and non-Muslims alike. These views are considered when Muslim-Americans act and play a large role in what action and communication is selected. However it …

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A Public Marriage: A Comparison Of Organizational Change Communication Between Two Cultures Involved In A Municipal Government Facilities Merger, Sharon Michaela Dollar Jan 2011

A Public Marriage: A Comparison Of Organizational Change Communication Between Two Cultures Involved In A Municipal Government Facilities Merger, Sharon Michaela Dollar

Communication Theses - Archive

This study compares the change communication of two public organizations (a City and School District) during a municipal government facility merger as well as the effects of the merger on the organizations' cultures. It is unique in that the organizations merged only their facilities and not their business operations or organizational cultures. Therefore, the two organizations remained distinctly separate institutions. Data for this study consisted of 14 in-depth interviews. The results revealed that due to the separation in communication before the change, the School District had less formal communication with their employees as did the City. The limited communication resulted …

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Saplings 2011, Sean M. Goins, Joseph Braner, Amy L. Myers, Charlie Jackson, Julia I. Chapman, Ryan W. Mcewan Jan 2011

Saplings 2011, Sean M. Goins, Joseph Braner, Amy L. Myers, Charlie Jackson, Julia I. Chapman, Ryan W. Mcewan

Data Files: Drew Woods Permanent Plots

Sapling data (woody species >50 centimeters in height and <2.5 cm diameter at breast height) collected in 2011 at Drew Woods State Nature Preserve in Darke County, OH. Data key is provided in a supplemental file.

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Overstory 2011, Sean M. Goins, Joseph Braner, Amy L. Myers, Charlie Jackson, Albert J. Burky, Julia I. Chapman, Ryan W. Mcewan Jan 2011

Overstory 2011, Sean M. Goins, Joseph Braner, Amy L. Myers, Charlie Jackson, Albert J. Burky, Julia I. Chapman, Ryan W. Mcewan

Data Files: Drew Woods Permanent Plots

Overstory data (woody species ≥2.5 centimeters in diameter at breast height) collected in 2011 at Drew Woods State Nature Preserve in Darke County, OH. Data key is provided in a supplemental file.

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Will The Convention On Biological Diversity Put An End To Biological Control?, Joop C. Van Lenteren, Matthew J.W. Cock, Jacques Brodeur, Barbara I.P. Barratt, Franz Bigler, Karel Bolckmans, Fabian Haas, Peter G. Mason, José Roberto P. Parra Jan 2011

Will The Convention On Biological Diversity Put An End To Biological Control?, Joop C. Van Lenteren, Matthew J.W. Cock, Jacques Brodeur, Barbara I.P. Barratt, Franz Bigler, Karel Bolckmans, Fabian Haas, Peter G. Mason, José Roberto P. Parra

All Peer-Reviewed Publications

Will the Convention on Biological Diversity put an end to biological control? Under the Convention on Biological Diversity countries have sovereign rights over their genetic resources. Agreements governing the access to these resources and the sharing of the benefits arising from their use need to be established between involved parties. This also applies to species collected for potential use in biological control. Recent applications of access and benefit sharing principles have already made it difficult or impossible to collect and export natural enemies for biological control research in several countries. If such an approach is widely applied it would impede …

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The Flight Activity Of Prostephanus Truncatus (Horn) (Coleoptera: Bostrichidae) And Teretrius Nigrescens Lewis (Coleoptera: Histeridae) In Kenya, Bonaventure Aman Omondi, Nanqing Jiang, Johnnie Van Den Berg, Fritz Schulthess Jan 2011

The Flight Activity Of Prostephanus Truncatus (Horn) (Coleoptera: Bostrichidae) And Teretrius Nigrescens Lewis (Coleoptera: Histeridae) In Kenya, Bonaventure Aman Omondi, Nanqing Jiang, Johnnie Van Den Berg, Fritz Schulthess

All Peer-Reviewed Publications

The invasive storage pest, the larger grain borer (LGB) Prostephanus truncatus (Horn), was introduced into the maize-deficit, semi-arid areas of the eastern region in Kenya in the early 1980s. In spite of containment efforts and the introduction of the predator Teretrius nigrescens Lewis from Mexico, LGB has spread to the main maize production zone in western Kenya during the past five years. The present work presents results from a 28-month monitoring effort of LGB and its predator, using pheromone traps at five locations along an east-west transect across Kenya. LGB occurred in all regions with highest trap catches in the …

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Repellent Activity Of Catmint, Nepeta Cataria, And Iridoid Nepetalactone Isomers Against Afro-Tropical Mosquitoes, Ixodid Ticks And Red Poultry Mites, Michael A. Birkett, Ahmed Hassanali, Solveig Hoglund, Jan Pettersson, John A. Pickett Jan 2011

Repellent Activity Of Catmint, Nepeta Cataria, And Iridoid Nepetalactone Isomers Against Afro-Tropical Mosquitoes, Ixodid Ticks And Red Poultry Mites, Michael A. Birkett, Ahmed Hassanali, Solveig Hoglund, Jan Pettersson, John A. Pickett

All Peer-Reviewed Publications

The repellent activity of the essential oil of the catmint plant, Nepeta cataria (Lamiaceae), and the main iridoid compounds (4aS,7S,7aR) and (4aS,7S,7aS)-nepetalactone, was assessed against (i) major Afro-tropical pathogen vector mosquitoes, i.e. The malaria mosquito, Anopheles gambiae s.s. and the Southern house mosquito, Culex quinquefasciatus, using a World Health Organisation (WHO)-approved topical application bioassay (ii) the brown ear tick, Rhipicephalus appendiculatus, using a climbing repellency assay, and (iii) the red poultry mite, Dermanyssus gallinae, using field trapping experiments. Gas chromatography (GC) and coupled GC-mass spectrometry (GC-MS) analysis of two N. cataria chemotypes (A and B) used in the repellency assays …

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Interpopulation Variation In Kairomone Use By Cyrba Algerina, An Araneophagic Jumping Spider From Portugal, Ana M. Cerveira, Robert R. Jackson Jan 2011

Interpopulation Variation In Kairomone Use By Cyrba Algerina, An Araneophagic Jumping Spider From Portugal, Ana M. Cerveira, Robert R. Jackson

All Peer-Reviewed Publications

Geographic variation in a predator's reliance on kairomones from prey was investigated. The predator studied, Cyrbaalgerina, is an araneophagic (spider-eating) jumping spider (Salticidae) and the prey were oecobiid spiders (Oecobiidae). There were two study sites (Sintra and Tavira), both in Portugal. Oecobiusmachadoi was a common oecobiid in Sintra, but no oecobiids were found in Tavira. Staged encounters showed that oecobiid-specific prey-capture behaviour was adopted by the C. algerina in Sintra but not in Tavira. In experiments using a Y-shaped olfactometer, significantly more Sintra C. algerina individuals chose the side with oecobiid odour instead of the blank side when the odour …

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Understanding Teacher Users Of A Digital Library Service: A Clustering Approach, Beijie Xu, Mimi Recker Jan 2011

Understanding Teacher Users Of A Digital Library Service: A Clustering Approach, Beijie Xu, Mimi Recker

Instructional Technology and Learning Sciences Faculty Publications

This article describes the Knowledge Discovery and Data Mining (KDD) process and its application in the field of educational data mining (EDM) in the context of a digital library service called the Instructional Architect (IA.usu.edu). In particular, the study reported in this article investigated a certain type of data mining problem, clustering, and used a statistical model, latent class analysis, to group the IA teacher users according to their diverse online behaviors. The use of LCA successfully helped us identify different types of users, ranging from window shoppers, lukewarm users to the most dedicated users, and distinguish the isolated users …

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The Uva Bay Game:Complex Systems, Interdisciplinary Collaboration, And Institutional Renewal, J. Plank, David F. Feldon, W. Sherman, J. Elliott Jan 2011

The Uva Bay Game:Complex Systems, Interdisciplinary Collaboration, And Institutional Renewal, J. Plank, David F. Feldon, W. Sherman, J. Elliott

Instructional Technology and Learning Sciences Faculty Publications

Research-intensive universities enjoy—or suffer—a paradoxical reputation: They are thought to be dedicated to both cutting-edge research and to the preservation of the canon. They are seen as broad and diverse communities of scholars with a vibrant collective intellectual life, yet also as silos of disciplinary entrenchment. Most significantly, they are thought of as places where the complex problems of our society are studied intensely but from which solutions are rarely forthcoming.

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A Non-Invasive Assessment Of Moisture Content Of Municipal Solid Waste In A Landfill Using Resistivity Imaging, Huda Shihada Jan 2011

A Non-Invasive Assessment Of Moisture Content Of Municipal Solid Waste In A Landfill Using Resistivity Imaging, Huda Shihada

Civil Engineering Dissertations - Archive

A bioreactor landfill is operated to enhance waste decomposition, gas production, and refuse stabilization. The fundamental aspect in the operation of a bioreactor landfill is the controlled addition of water and/or the recirculation of leachate into the landfill's waste mass. Since there is an increasing trend to operate landfills as bioreactor landfills, it is crucial to understand the moisture distribution within the landfill. Monitoring the moisture distribution within a bioreactor landfill is essential not only for the design and operation of leachate recirculation systems, but also to identify sites with non-uniform leachate distribution due to ponding and channeling.In the recent …

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Design Of Short Drilled Shaft Foundations In High-Plasticity Clay Under Inclined Loading, Thornchaya Wejrungsikul Jan 2011

Design Of Short Drilled Shaft Foundations In High-Plasticity Clay Under Inclined Loading, Thornchaya Wejrungsikul

Civil Engineering Dissertations - Archive

Drilled shaft foundations are primarily used to support structures such as bridge piers, towers, buildings, transmission towers, and roadway cable barriers. Generally, the main characteristics of drilled shafts are to transfer the loads to the stronger layers in the vertical direction and also their ability to withstand lateral movements from lateral loads. Though the design of shafts are well established with respect to combinations of loads and moments, their behavior under pullout type inclined loading is not well established. The inclined load applied is the combination of lateral and uplift loads at the same time and structures such as ends …

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Sustainable Reutilization Of Excavated Trench Material, Rajini Kanth Reddy Karduri Jan 2011

Sustainable Reutilization Of Excavated Trench Material, Rajini Kanth Reddy Karduri

Civil Engineering Theses - Archive

Sustainability is becoming a key factor in most construction projects. In most construction projects, personnel are spending efforts to understand the social, economic and environmental impacts of the various facets of construction projects. Geotechnical engineering can contribute to the sustainability of the project via selecting sustainable materials and construction processes that would to lead several tangible benefits. For example a pipeline generally runs through a long and varying terrain which results in innumerable environmental impacts during a pipeline installation. Therefore, it is necessary for the design engineer and also the owner to estimate these impacts of pipe installation and evaluate …

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On The Effects Of The Circular Bolt Pattern On The Behavior Of The Extended End-Plate Connection, Roozbeh Kiamanesh Jan 2011

On The Effects Of The Circular Bolt Pattern On The Behavior Of The Extended End-Plate Connection, Roozbeh Kiamanesh

Civil Engineering Dissertations - Archive

This study is pioneer in introducing the circular bolt pattern configuration in extended end-plate steel connections. Discovering the static and cyclic behavior of such connections is at the forefront of this research study. To accomplish this goal, full-scale experimental testing complemented with three dimensional non-linear finite element analysis were conducted. Due to the similarity between the behavior of T-Stubs under tension, and tension flange of the extended end-plate connection, experimental study was conducted on several T-Stub connections to study the effect of the bolt pattern configuration on the ductility, bolt force distribution, flange deformation, and overall performance of the connection. …

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An Investigation Of The Conceptual Understanding Of Continuity And Derivatives In Calculus Of Emerging Scholars Versus Non-Emerging Scholars Program Students, Susan Lai Chan Jan 2011

An Investigation Of The Conceptual Understanding Of Continuity And Derivatives In Calculus Of Emerging Scholars Versus Non-Emerging Scholars Program Students, Susan Lai Chan

Mathematics Theses - Archive

The Emerging Scholars Program (ESP) has been adapted at colleges and universities across the nation in efforts to increase student access to Science, Technology, Engineering and Mathematics (STEM) disciplines. This study uses a written assessment to gain insight regarding conceptual knowledge on continuity and derivatives for ESP students versus non-ESP students in the same lecture course in first semester calculus at large urban university in the southwest. We analyze the assessment results of 22 ESP and 48 non-ESP students and discuss findings, particularly, those that indicate statistically significant differences regarding continuity over an interval.

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A Snapshot Of Advanced High School Students' Understanding Of Continuity, Melissa Jo Vela Jan 2011

A Snapshot Of Advanced High School Students' Understanding Of Continuity, Melissa Jo Vela

Mathematics Theses - Archive

We report on a study of sixteen high school calculus and seven precalculus students' concept image and concept definition of continuity after one-trimester of instruction at a large suburban high school in the southwestern United States. The researchers developed a questionnaire based upon the work of Tall and Vinner (1981) to determine if calculus students had developed a more sophisticated concept image and concept definition of continuity than students in pre-calculus after a typical treatment in both courses. Using data from the written assessment it was not evident that calculus students demonstrated a more sophisticated concept image and concept definition …

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Synthesis And Characterization Of Carbon Magnetic Nanoparticles, Sunilsingh Gusain Jan 2011

Synthesis And Characterization Of Carbon Magnetic Nanoparticles, Sunilsingh Gusain

Material Science and Engineering Theses - Archive

Carbon incorporated iron nanoparticles (Fe-CNPs) were successfully synthesized using ultrasonic cavitation in Benzene. This novel method of carbon nanoparticle (CNP) synthesis is a very cost-effective and versatile as one can easily tune the microstructure and magnetic properties by varying few parameters, for e.g. voltage. The Fe-CNP complexes are produced due to the electric plasma discharge generated between the electrodes in an ultrasonic cavitation field of liquid benzene. The constituent of the CNPs can be easily modified by different choice of electrode materials- iron and graphite. The resultant Fe-CNPs were characterized by high-resolution transmission electron microscopy and X-ray photoelectron spectroscopy to …

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Texas Law Enforcement Resource Center: An Exploratory Study Of Fusion Center Databases, Tyler Lawrence Evenson Jan 2011

Texas Law Enforcement Resource Center: An Exploratory Study Of Fusion Center Databases, Tyler Lawrence Evenson

Criminology & Criminal Justice Theses - Archive

This research is a qualitative study examining fusion center databases, their value to the field of criminal justice, and their potential for shared information/education in the future. The research examines the growing trend of information sharing and analysis and describes a fusion center database created by the Center of Criminal Justice Research and Training within the Department of Criminology and Criminal Justice at the University of Texas at Arlington. Secondary data is reviewed and analyzed on current fusion centers to examine their methods of information gathering, analysis, program implementation, and overall mission.

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Engineered Basal Lamina Equivalent - Fabrication And Biomedical Applications, Deepika Tamuly Jan 2011

Engineered Basal Lamina Equivalent - Fabrication And Biomedical Applications, Deepika Tamuly

Bioengineering Theses - Archive

A novel technique based on the principle of solvent casting is developed to create uniform, ultrathin and stackable films of Collagen I/IV and ECMgel for use as Engineered Basal Lamina Equivalent. The mixture of these two proteins provides key molecular elements (laminin, collagen type IV, entactin and perlecan) in a basal lamina with strong mechanical properties (collagen type I). Rat tail derived collagen solution is mixed with ECMgel, and the solution is cast onto PDMS molds and air dried in a custom built air tunnel. The dried membranes are briefly UV cross-linked, peeled off from the PDMS mold to be …

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Implementation Of A Pain Generator Controlled By Pressure And Feasability In Its Applications For Functional Near-Infrared Spectroscopy, Pamela Agwa Tebebi Jan 2011

Implementation Of A Pain Generator Controlled By Pressure And Feasability In Its Applications For Functional Near-Infrared Spectroscopy, Pamela Agwa Tebebi

Bioengineering Theses - Archive

Pain is a sensory and emotional experience as a result of possible or definite tissue damage. The level of pain is subjective to the individual's consciousness of sensory stimuli. Pain stimuli can be noxious (i.e., potentially damaging) or innocuous (i.e., normally not painful). Therefore, pain perception can be based on the degree of the stimuli. Studies have been done using brain imaging modalities to assess pain. Functional Near-infrared spectroscopy (fNIRS) is a noninvasive imaging tool and has been used to study the hemodynamic variations in the brain induced by a variety of activations. This research was a feasibility study to …

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Investigation Of Brain Activity In Prefrontal Cortex Under Noxious Pain Stimuli And During Psychological Test Using Functional Near Infrared Spectroscopy, Sabin Khadka Jan 2011

Investigation Of Brain Activity In Prefrontal Cortex Under Noxious Pain Stimuli And During Psychological Test Using Functional Near Infrared Spectroscopy, Sabin Khadka

Bioengineering Theses - Archive

Functional Near Infrared Spectroscopy (fNIRS) is a non-invasive functional neuroimaging technique, which measures changes in oxy-hemoglobin (HbO) and deoxy-hemoglobin (HbR) concentrations based on the principle of near infrared spectroscopy. For my thesis, I have utilized fNIRS in the prefrontal regions to study cognitive functions under noxious pain and during a psychological test. The fNIRS signals were acquired from the prefrontal cortex (PFC) in order to investigate the hemodynamic response under noxious pain stimuli. The measurement consisted of two different visits separated by seven to ten days with two different levels of pain intensity. From the observations, PFC shows significant deactivation …

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Evaluation Of Spatial Resolution And Localization Accuracy Of Absorbing Heterogenity Embedded In Homogenous And Layered Turbid Media Using Functional Near Infrared Spectroscopy, Niranjana Nandakumar Jan 2011

Evaluation Of Spatial Resolution And Localization Accuracy Of Absorbing Heterogenity Embedded In Homogenous And Layered Turbid Media Using Functional Near Infrared Spectroscopy, Niranjana Nandakumar

Bioengineering Theses - Archive

Functional Near-Infrared Spectroscopy (fNIRS) is a non-invasive widely used technique for imaging the brain activation patterns in the cerebral cortex of neonates and adults. For the fNIRS imaging of these brain activation patterns, it is common to assume the head geometry as a homogenous medium due to the resulting computational simplicity of the image reconstruction problem. In reality the head is not a simple homogenous medium and prior research has been conducted to show that light propagates differently in a spatially heterogeneous model of the head compared to a homogenous one, which alters the sensitivity of NIR light detection on …

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A Multimodality Dlp® Imaging System For Clinical Surgery, Michael Lee Mangum Jan 2011

A Multimodality Dlp® Imaging System For Clinical Surgery, Michael Lee Mangum

Bioengineering Theses - Archive

With 1.38 million new cases and 450,000 deaths worldwide due to breast cancer, there is a clear need for safe and complete surgical intervention for the treatment of breast cancer. Imaging solutions have been created and developed to help plastic surgeons during breast reconstructive surgery. However, these solutions were implemented separately depending on their particular modality, which can result in higher costs for hospital and patient use. The digital micromirror device (DMD) developed by Texas Instruments has been shown to exhibit spectral control of light at a digital level, and could theoretically allow for the incorporation of multiple imaging modalities …

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Three-Dimensional Multimedium Computational Model For Drug Delivery Using Finite Element Analysis, Eduardo Martinez Jan 2011

Three-Dimensional Multimedium Computational Model For Drug Delivery Using Finite Element Analysis, Eduardo Martinez

Bioengineering Theses - Archive

Approximately 2.8% of trauma patients present peripheral nerve injury, which can result in loss of motor function. Current strategies for peripheral nerve repair had focused on the development of synthetic nerve conduits that provide physical guidance. One advantage of the synthetic nerve conduits is that the conduit can be utilize as a delivery system and gain the ability to deliver neurotrophic factors, which have an effect on controlling the survival, migration, proliferation, and differentiation of different neural cell types. Currently there is no method to quantify the concentration of growth factors in the nerve conduit during the implantation time. In …

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Addresses Delivered At The Asbury Aldersgate Renewal Fellowship, 1996, February 29-March 2, Part 1, Greg Paris Jan 2011

Addresses Delivered At The Asbury Aldersgate Renewal Fellowship, 1996, February 29-March 2, Part 1, Greg Paris

ATS Chapel Services

No abstract provided.

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Bible Study: 1 Peter 3:8-22, C. K. Barrett Jan 2011

Bible Study: 1 Peter 3:8-22, C. K. Barrett

ATS Chapel Services

No abstract provided.

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