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Articles 19951 - 19980 of 25685

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Comparative Damage Of Different Truck Configurations On Jointed Plain Concrete Pavement, Tito P. Nyamuhokya Jan 2009

Comparative Damage Of Different Truck Configurations On Jointed Plain Concrete Pavement, Tito P. Nyamuhokya

Civil Engineering Theses - Archive

This study estimated the damage done by trucks with 35 different configurations on a typical structure of a Jointed Plain Concrete Pavement. The configurations were proposed by New York Department of Transportation, the sponsor of this study. The generalized three dimensional finite element program Abaqus was used to calculate the response of linear elastic rigid pavement structure under truck loading. The loads for each truck case were placed at critical locations on the surface of the pavement to obtain the maximum tensile stresses at the bottom of concrete slab. The computed tensile stresses were used in Darter fatigue model (1977) …

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Adaptive Nonparametric Distribution-Free Procedures In Factorial Data Analysis, Richard Nzagong Ferim Jan 2009

Adaptive Nonparametric Distribution-Free Procedures In Factorial Data Analysis, Richard Nzagong Ferim

Mathematics Dissertations - Archive

Many statisticians have questioned the basic assumptions about underlying models which might dominate the analysis of the data in many cases. The assumption of normality without much thought is of concern to a growing group of statisticians. If wrongly assumed, the assumption of normality can lead in serious flaws in the analysis of data. It therefore becomes important to consider distribution-free procedures that don't have to rely on the normality assumption. This is where the adaptive procedures come into play. When data is skewed or light tailed, these adaptive methods produce better results than the regular Wilcoxon and parametric methods. …

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Morphology And Cathode Optimization For Efficient Polymer Bulk Heterojunction Solar Cells, Yi Yang Jan 2009

Morphology And Cathode Optimization For Efficient Polymer Bulk Heterojunction Solar Cells, Yi Yang

Material Science and Engineering Theses - Archive

Efficiency of polymer bulk heterojunction solar cell is highly dependent on the active layer morphology and can be controlled by specific experimental conditions. In this work, the influences of P3HT:PCBM blend composition, solution concentration, and the thermal annealing on the cell performance are presented. The maximum of Jsc and FF are reached when the weight percentage of PCBM in the blend is 60 % under which both high density of donor and accepter interfaces expecting the formation of efficient percolated electron transport paths. 36 mg/ml is found to be the optimum solution concentration for P3HT:PCBM blend and it can be …

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Effect Of Aging On The Transformation Of Phases In Solder Joint Of Pbga Packaging, Jeong-Min Kim Jan 2009

Effect Of Aging On The Transformation Of Phases In Solder Joint Of Pbga Packaging, Jeong-Min Kim

Material Science and Engineering Theses - Archive

This study investigates the microstructural characteristics of 3.0Ag-0.5Cu-Sn (SAC305) solder joint as in assembled state, and their evolution with aging treatment at 100 and 150°C for various hours. Specific aim of the study is 1) to understand thermodynamic stability of as-reflowed microstructure (β-Sn dendrite, inner dendrite Cu6Sn5 intermetallic (IMC) compound, and the eutectic structure), 2) to find direction of their change with aging, and 3) to relate interfacial reaction to such evolution in microstructures. This investigation is spurred by the findings made in a separate study where fatigue resistance of solder joint and failure location shows markedly keen dependence on …

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Structural, Magnetic And Surface Properties Of Rf Magnetron Sputtered Undoped Lanthanum Mangnite Thin Films, Varad Rajan Sakhalkar Jan 2009

Structural, Magnetic And Surface Properties Of Rf Magnetron Sputtered Undoped Lanthanum Mangnite Thin Films, Varad Rajan Sakhalkar

Material Science and Engineering Theses - Archive

In the present study, polycrystalline and epitaxial undoped Lanthanum Manganite (LMO) thin films were deposited by using RF magnetron sputtering on three substrates, Si (100), MgO (100) and LaAlO₃ (100) to study the influence of the misfit strain at the substrate/film interface. The effect of processing conditions on the synthesis of LMO films was studied by conducting deposition on Si wafer. Films were characterized by X-Ray Diffraction (XRD), Atomic Force Microscope (AFM), Energy Dispersive Spectroscopy (EDS) and Superconducting Quantum Interference Device (SQUID) to investigate the influence of processing parameters on their structure and properties. Based on the initial study on …

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Religious Roots Of Punitive Attitudes, Jessica Marie Millares Jan 2009

Religious Roots Of Punitive Attitudes, Jessica Marie Millares

Criminology & Criminal Justice Theses - Archive

Considerable research has been conducted on the causes of punitive attitudes towards criminal offenders. This study focuses on the possible effects religion may have when influencing opinions on correctional practices. Researchers have primarily focused on Christian fundamentalists and have come to the conclusion that fundamentalist affiliations and belief in biblical literalism has been related to punitive attitudes towards criminals. Religious individuals have been found to support harsher punishments for offenders such as mandatory sentencing and capital punishment.In this study, the relationship between religion and punitive attitudes was examined. It was found that those who believed in the literal interpretation of …

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A Study On The Effect Of Mechanical Stretch And Aligned Scaffold Architecture On Morphology Of Rat Ventricular Cells, Shruti Kanakia Jan 2009

A Study On The Effect Of Mechanical Stretch And Aligned Scaffold Architecture On Morphology Of Rat Ventricular Cells, Shruti Kanakia

Bioengineering Theses - Archive

Heart disease is one of the major causes of death in developing and industrialized countries. Myocardial infarction leads to remodeling of the left ventricle, which severely affects the pumping efficiency of the heart. In order to provide mechanical support to left ventricle the scaffold material should be elastic and mechanically strong. For the success of cardiac graft in vivo one of the important factor is ability of cardiac myocyte morphology to resemble that in vivo. The goal of this study is to build thick, prevascularized cardiac graft for myocardial infarction repair. Mechanical stress has been recognized as one of the …

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An Evaluation Of The Biomechanical Properties Of The Superficial Musculoaponeurotic System, Matthew David Ruff Jan 2009

An Evaluation Of The Biomechanical Properties Of The Superficial Musculoaponeurotic System, Matthew David Ruff

Bioengineering Theses - Archive

The Superficial Musculoaponeurotic System (SMAS) is a well defined tissue layer of the face commonly utilized in facial surgery, including facelifts. There are several reasons for the utilization of this tissue, including aesthetic results and reliability. Basic to the outcomes for these procedures are the inherent biomechanical properties of the SMAS. Most important for the surgeon in this regard are tissue burst pressure, elasticity, stress-relaxation under load, and creep. This study experimentally determines the biomechanical properties for human cadaveric tissue specimens. As well as defining the cited biomechanical properties, the study examines how they change, as sampled from different regions …

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Signal Processing Techniques For Artifact Removal In Electroencephalogram (Eeg), Jyoti Bhat Jan 2009

Signal Processing Techniques For Artifact Removal In Electroencephalogram (Eeg), Jyoti Bhat

Bioengineering Theses - Archive

The electroencephalographic recordings measure the electric impulses generated in the brain, in response to a given stimulus. The spontaneous EEG data is used for diagnosis and treatment of some brain diseases. For the data to be used for clinical applications, it needs to be free of the various artifacts like the eye blinks, movement, head movements and muscle activity. These artifacts need to be corrected or the affected parts need to be removed in the preprocessing of the EEG dataset. This pre-processing is normally done manually, which tends to be not only time-consuming but also subjective. With large number of …

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Diffuse Optical Imaging Of Brain Function Under Repetitive Transcranial Magnetic Stimulation And In Children With Cerebral Palsy, Sameer C. Dhamne Jan 2009

Diffuse Optical Imaging Of Brain Function Under Repetitive Transcranial Magnetic Stimulation And In Children With Cerebral Palsy, Sameer C. Dhamne

Bioengineering Theses - Archive

Diffuse Optical Imaging (DOI) is a non-invasive neuroimaging technique which measures the changes in oxy- and deoxy-hemoglobin concentrations at a high temporal resolution based on the principle of Near-Infrared Spectroscopy.DOI was combined with repetitive Transcranial Magnetic Stimulation (rTMS) to assess the neuronal changes induced in the cortical regions, which are directly under rTMS and the connected areas, by applying 1Hz rTMS to the left hemisphere of the motor cortex followed by the stimulation to the prefrontal cortex for two visits. The DOI signals were simultaneously acquired from both ipsilateral and contralateral brain regions before, during, and after rTMS. We observed …

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Electrical Apparoaches For Selective Detection Of Cancer Biomarker Proteins With Aptamers, Priyanka Pachampettai Ramachandran Jan 2009

Electrical Apparoaches For Selective Detection Of Cancer Biomarker Proteins With Aptamers, Priyanka Pachampettai Ramachandran

Bioengineering Theses - Archive

Cancer is a disease that is the central focus of many a researcher's attention. As it is a disease that can spread very rapidly and can be fatal in many cases, its early detection and early treatment can dramatically change mortality. Towards the early detection of the disease, antibodies are most commonly used for the detection of cancer biomarkers. The use of antibodies in diagnostics has proven fruitful in the past. But advancements in molecular biology have introduced aptamers for diagnostic and therapeutic purposes. Aptamers are oligonucleotides or peptides that are usually synthesized by a selective process called SELEX. Aptamers …

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Biaxial Investigation Of Periosteal Mechanics, Olumide O. Aruwajoye Jan 2009

Biaxial Investigation Of Periosteal Mechanics, Olumide O. Aruwajoye

Bioengineering Theses - Archive

Limb lengthening procedures are used commonly to correct limb length discrepancies. Current methods in limb lengthening require a distraction of 1 mm per day using an external fixation device. Although the underlying mechanisms of new bone growth have been studied and discussed extensively, they remain not fully understood. It is thought, however, that mechanoreceptor cells of the periosteum play an important role. In an attempt to understand the contribution of periosteum, the biaxial mechanical properties of the periosteum are studied. Freshly excised porcine periosteum was used to investigate the effects of preload on the material symmetry, and the effects of …

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Analysis Of Oxygen Uptake During Blood Flow Through A Rectangular Microchannel: A Two Phase Eulerian Model With Oxygen-Hemoglobin Reaction, Jamie Wright Jan 2009

Analysis Of Oxygen Uptake During Blood Flow Through A Rectangular Microchannel: A Two Phase Eulerian Model With Oxygen-Hemoglobin Reaction, Jamie Wright

Bioengineering Theses - Archive

The evolution of oxygenator design has culminated in the current strategy of utilizing micro-porous membranes to separate blood and oxygen phases while utilizing extra-luminal blood flow orientations to promote passive and active secondary mixing of the blood to inhibit the build up of concentration boundary layers near oxygen transfer surfaces that impede efficiency. Advances in fabrication techniques could allow for the manufacturing of oxygenators employing microchannels to decrease the diffusion path between oxygen and the red blood cells, more closely mimicking the strategy employed by the body. Because blood is actually a complex suspension, it is difficult to model. Furthermore, …

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Cultural And Diversity Perceptions Of It Workers Of Indian Descent, Amy B. Woszcznyski, P. Dembla, Sherri Shade Jan 2009

Cultural And Diversity Perceptions Of It Workers Of Indian Descent, Amy B. Woszcznyski, P. Dembla, Sherri Shade

Faculty Articles

Globalization has led to increased use of international work teams comprised of individuals from diverse backgrounds. Beliefs and values of individuals affect the working of such groups, so it is important to understand these differences. The aim of this paper is to understand the cultural and diversity perceptions of IT workers specifically of Indian descent. Two instruments, namely the Diversity Perceptions Index and Hofstede Value survey, were used to collect data. One hundred and eleven respondents of Indian descent working in the IT field completed the survey. Descriptive statistics provided initial results and discussion. The respondents valued diversity, although they …

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Capturing The Teachable Moments Online, Eric Frierson Jan 2009

Capturing The Teachable Moments Online, Eric Frierson

UTA Libraries Staff Publications - Archive

Describes methods to capture teachable moments in asynchronous platforms

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Simulations Of High-Latitude Ionosphere-Magnetosphere Region Plasma Density Structures And The AlfvéN Waves Effects, Fajer Bitar Jaafari Jan 2009

Simulations Of High-Latitude Ionosphere-Magnetosphere Region Plasma Density Structures And The AlfvéN Waves Effects, Fajer Bitar Jaafari

Physics Dissertations - Archive

O+ density structures in the polar cap ionosphere-magnetosphere region near 6000 km altitude have been observed with numerous spacecraft, with O+ densities ranging from above 10 cm-3 to lower than 0.01 cm-3. Regions with densities in the low range have been referred to as O+ density troughs [Zeng et al., 2004], or ion depletion zones [Horita et al., 1993]. Regions with high O+ densities are likely caused by processes such as soft auroral electron precipitation and transverse wave heating. In this simulation work, we use the UT Arlington Dynamic Fluid-Kinetic (DyFK) ionospheric plasma transport model to model O+ density profiles …

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Moment Calculations For Low Energy Ions In Jupiter's Magnetotail From Nasa's New Horizons Mission, Debrup Hui Jan 2009

Moment Calculations For Low Energy Ions In Jupiter's Magnetotail From Nasa's New Horizons Mission, Debrup Hui

Physics Theses - Archive

Jupiter's magnetosphere and magnetotail is the largest cohesive structure in our solar system which extends to the orbit of Saturn. One of NASA's objectives is to understand how universal bodies interact with its surroundings. The New Horizons (NH) mission is the first satellite to traverse axially through the Jovian magnetotail and obtain in-situ data. The Solar Wind Around Pluto (SWAP) instrument onboard NH measured low energy ions from 35eV to 7.5 keV in the Jovian magnetotail during its fly-by. We analyzed SWAP data from 500-1750 Jovian radii (RJ) when the spacecraft was spinning. A 3D phase-space density fitting procedure was …

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Development And Characterization Of Gas Electron Multiplier Chambers For A Digital Hadron Calorimeter In The International Linear Collider, Jacob Russell Smith Jan 2009

Development And Characterization Of Gas Electron Multiplier Chambers For A Digital Hadron Calorimeter In The International Linear Collider, Jacob Russell Smith

Physics Theses - Archive

Gas Electron Multiplier, or GEM, technology provides an attractive option for high precision jet energy measurements for future high energy physics experiments at the International Linear Collider. High voltage settings and gas mixture ratios are determined to optimize double GEM chamber gain and efficiency performance. Electronics readout using QPAO2 chipset and the analog KPIX system developed by Stanford Linear Accelerator Center are used at different stages of the development and characterization of double GEM chambers. The results presented in this thesis are performed primarily at UTA using radioactive sources and cosmic ray particles but also include results from test beam …

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Landscaping On The New Frontier: Waterwise Design For The Intermountain West, Susen E. Meyer, Roger Kjelgren, Darrel G. Morrison, William A. Varga Jan 2009

Landscaping On The New Frontier: Waterwise Design For The Intermountain West, Susen E. Meyer, Roger Kjelgren, Darrel G. Morrison, William A. Varga

Plants, Soils, and Climate Faculty Publications

A practical volume for the home or business owner on landscaping with native, drought-tolerant plants in the Rocky Mountain West. Filled with color illustrations, photos, and design sketches, over 100 native species are described, while practical tips on landscape design, water-wise irrigation, and keeping down the weeds are provided. In this book you will learn how to use natural landscapes to inspire your own designed landscape--around your business or home and yard. Included are design principles, practical ideas, and strong examples of what some homeowners have already done to convert traditional "bluegrass" landscapes into ones that are more expressive of …

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Field Release Of A Non-Toxigenic Aspergillus Flavus L Strain In Central Benin, A. M. Klueken, C. Borgemeister, B. Hau Jan 2009

Field Release Of A Non-Toxigenic Aspergillus Flavus L Strain In Central Benin, A. M. Klueken, C. Borgemeister, B. Hau

All Peer-Reviewed Publications

Non-toxigenic strains of Aspergillus flavus (Link) can be used as biological control agents to reduce the contamination of grains such as maize with carcinogenic and immunotoxic aflatoxins. Based on its sclerotial morphology, A. flavus is commonly divided into two types: L strains and S strains. In this study, we applied the non-toxigenic A. flavus L strain BN030D to the soil of five maize fields in Djidja, central Benin, to investigate its effects on the composition of the prevailing fungal communities, on the ratio of A. flavus L strains and S strains, and on the vegetative compatibility of L strains with …

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Larvicidal Activity Of Extracts From Three Plumbago Spp Against Anopheles Gambiae, Barasa M. Maniafu, Lwande Wilber, Isaiah O. Ndiege, Cornelius C. Wanjala, Teresa Ayuko Akenga Jan 2009

Larvicidal Activity Of Extracts From Three Plumbago Spp Against Anopheles Gambiae, Barasa M. Maniafu, Lwande Wilber, Isaiah O. Ndiege, Cornelius C. Wanjala, Teresa Ayuko Akenga

All Peer-Reviewed Publications

Three Plumbago spp have been tested for mosquito larvicidal activity. The crude extracts exhibiting the highest larvicidal activity against Anopheles gambiae were hexane (LC50 = 6.4 μg/mL) and chloroform (LC50 = 6.7 μg/mL) extracts from Plumbago zeylanica Linn, chloroform (LC50 = 6.7 ug/mL) extract from Plumbago stenophylla Bull and ethyl acetate (LC50 = 4.1 μg/mL) extract from Plumbago dawei Rolfe. These LC50 values were within 95% confidence limits. 5-hydroxy-2-methyl-1,4-naphthoquinone (plumbagin) 1 (LC50 = 1.9 μg/mL) and β-sitosterol 2 were characterised from ethyl acetate extract of root bark of P. dawei, a native medicinal plant growing in Kenya, based on spectral …

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Soldiering In The Light, David Charlton Jan 2009

Soldiering In The Light, David Charlton

ATS Chapel Services

No abstract provided.

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The Triumph Of The Church (Audio), Robert Emerson Coleman Jan 2009

The Triumph Of The Church (Audio), Robert Emerson Coleman

ATS Chapel Services

No abstract provided.

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Know God, Know The Hope, Know The Power, Larry Eddings Jan 2009

Know God, Know The Hope, Know The Power, Larry Eddings

ATS Chapel Services

No abstract provided.

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Citigroup Form 8-K Exhibit 99.1, Citigroup Dec 2008

Citigroup Form 8-K Exhibit 99.1, Citigroup

Documents

No abstract provided.

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Qualitative Researchers In The Blogosphere: Using Blogs As Diaries And Data, Ronald J. Chenail Dec 2008

Qualitative Researchers In The Blogosphere: Using Blogs As Diaries And Data, Ronald J. Chenail

The Qualitative Report

Weblogs or blogs can provide qualitative researchers with a medium for expressing their thoughts and opinions on qualitative research methods and products as well as serving as the source of data for qualitative studies. Present examples serve as exemplary guides to the potential value of this virtual communication application.

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Bank Of Jamaica Balance Sheet, Bank Of Jamaica Dec 2008

Bank Of Jamaica Balance Sheet, Bank Of Jamaica

Documents

No abstract provided.

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The Epidemiology Of Giardia Spp. Infection Among Pet Dogs In The United States Indicates Space-Time Clusters In Colorado, Ahmed S. Mohamed, George E. Moore, Elizabeth Lund, Larry T. Glickman Dec 2008

The Epidemiology Of Giardia Spp. Infection Among Pet Dogs In The United States Indicates Space-Time Clusters In Colorado, Ahmed S. Mohamed, George E. Moore, Elizabeth Lund, Larry T. Glickman

GIS Day

Giardia infection has been found in a wide range of hosts including human, domestic, and wild animals. Dogs are the definitive host of G.duodenalis, which can cause diarrhea and other symptoms. Although zoonotic transmission of Giardia remains unclear, epidemiologic evidence suggests that some Giardia species are zoonotic. Additionally, Giardia has been associated with epidemics in the US and other countries making it one of the most important public health concerns. Prevalence of Giardia among dogs in the United States ranged from 10% in well-treated dogs to 30-50% in puppies and up to 100% in breeding kennels. However, prevalence of Giardia …

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Getting A Fulbright: Faculty Experience By Ann C Debaldo, Ann C. Debaldo Dec 2008

Getting A Fulbright: Faculty Experience By Ann C Debaldo, Ann C. Debaldo

FMHI Events and Lectures

Dr. Ann DeBaldo , Associate Dean, International Programs, College of Public Health, 2004 Fulbright grantee to India to further public health education and research in India

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Getting A Fulbright: Faculty Experience By Harry E Vanden, Harry E. Vanden Dec 2008

Getting A Fulbright: Faculty Experience By Harry E Vanden, Harry E. Vanden

FMHI Events and Lectures

Dr. Harry E. Vanden , Professor of Political Science and International Studies, Department of Government and International Affairs, College of Arts and Sciences, Fulbright grantee to Brazil to research U.S. Latin American Relations. Dr. Vanden also served as a Fulbright Scholar to Peru as grad student

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