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Total Synthesis Of 2-Aminoimidazole Alkaloids From Leucetta And Clathrina Sponges, Panduka B. Koswatta Jan 2010

Total Synthesis Of 2-Aminoimidazole Alkaloids From Leucetta And Clathrina Sponges, Panduka B. Koswatta

Chemistry & Biochemistry Dissertations - Archive

Sponges of the major class, Calcarea can be found in nearly all marine habitats. Two Calcarea genera, Leucetta and Clathrina have found be rich with 2-aminoimidazole alkaloids. The first alkaloid of these groups was isolated in 1987 from a bright yellow sponge of the class Calcispongiae (calcarea) and Leucetta chagosensis dendy (Leucetta) collected near Na'ama in the Gulf of Eilat (Aqaba) in the Red Sea. The nomenclature for this whole series of compounds is based on the location of the initial source material. The first Chapter describes the isolation, biological activities, possible biosyntheses and total synthesis of these alkaloids. The …

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Host Recognition And Acceptance Behaviour In Cotesia Sesamiae And C. Flavipes (Hymenoptera: Braconidae), Parasitoids Of Gramineous Stemborers In Africa, Meshack Obonyo, Fritz Schulthess, Bruno Le Ru, Johnnie Van Den Berg, Paul André Calatayud Jan 2010

Host Recognition And Acceptance Behaviour In Cotesia Sesamiae And C. Flavipes (Hymenoptera: Braconidae), Parasitoids Of Gramineous Stemborers In Africa, Meshack Obonyo, Fritz Schulthess, Bruno Le Ru, Johnnie Van Den Berg, Paul André Calatayud

All Peer-Reviewed Publications

The host recognition and acceptance behaviour of two braconid larval parasitoids (Cotesia sesamiae and C. flavipes) were studied using natural stemborer hosts (i.e., the noctuid Busseola fusca for C. sesamiae, and the crambid Chilo partellus for C. flavipes) and a non-host (the pyralid Eldana saccharina). A single larva was introduced into an arena together with a female parasitoid and the behaviour of the wasp recorded until it either stung the larva or for a maximum of 5 min if it did not sting the larva. There was a clear hierarchy of behavioural steps, which was similar for both parasitoid species. …

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Knowledge Management: Integrating Social Networking Technologies And A Generative Learning Environment, Priscilla Arling, Mark Chun, B. Mcquaid Jan 2010

Knowledge Management: Integrating Social Networking Technologies And A Generative Learning Environment, Priscilla Arling, Mark Chun, B. Mcquaid

Scholarship and Professional Work - Business

Social networking technologies have commanded a lot of recent attention because they have changed the manner in which individuals have traditionally and historically accessed and shared knowledge. Although these technologies provide individuals with the opportunity to access and to utilize a plethora of knowledge created by others, the knowledge still needs to be organized, interpreted, and incorporated by the user in order for it to be useful. This research sought to better understand how social networking technologies can aid a firm's efforts to establish a knowledge management and a generative learning environment. The study closely followed one of the United …

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Toward More Effective Implementation Of Evidence-Based Practice: Relational And Contextual Considerations, Priscilla Arling, Rebekah L. Fox, Bradley N. Doebbeling Jan 2010

Toward More Effective Implementation Of Evidence-Based Practice: Relational And Contextual Considerations, Priscilla Arling, Rebekah L. Fox, Bradley N. Doebbeling

Scholarship and Professional Work - Business

Priscilla Arling's contribution to Handbook of Healthcare Delivery Systems. London: Taylor & Francis, 2010.

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Immigrant Business Enterprises: A Classification Framework Conceptualization And Test, Roberto Curci, Robert Mackoy Jan 2010

Immigrant Business Enterprises: A Classification Framework Conceptualization And Test, Roberto Curci, Robert Mackoy

Scholarship and Professional Work - Business

This article proposes the Immigrant Business Enterprises Classification Framework to organize immigrant-owned businesses into categories associated with different levels of business integration into a host country's mainstream business community. The article applies the framework and reports the findings of structured face-to-face interviews with 199 Hispanic business enterprises (HBEs) in Indianapolis. The authors find Hispanic-owned businesses hold different characteristics depending upon the integration category in which they are classified; the findings suggest that to support immigrant entrepreneurship, governments, business development organizations, and researchers should address category-specific challenges, opportunities, and needs.

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Reinforcement Learning Based Strategies For Adaptive Wireless Sensor Network Management, Kunalbhai Shah Jan 2010

Reinforcement Learning Based Strategies For Adaptive Wireless Sensor Network Management, Kunalbhai Shah

Computer Science and Engineering Dissertations - Archive

In wireless sensor networks (WSN), resource-constrained nodes are expected to operate in highly dynamic and often unattended environments. WSN applications need to cope with such dynamicity and uncertainty intrinsic in sensor networks, while simultaneously trying to achieve efficient resource utilization. A middleware framework with support for autonomous, adaptive and distributed sensor management, can simplify development of such WSN applications. We present a reinforcement learning based WSN middleware framework to enable autonomous and adaptive applications with support for efficient resource management. The uniqueness of our framework lies in using a bottom-up approach where each sensor node is responsible for its resource …

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Quantitative Proof Of Reputational Harm, Meiring De Villiers Jan 2010

Quantitative Proof Of Reputational Harm, Meiring De Villiers

Fordham Journal of Corporate & Financial Law

No abstract provided.

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Development Of An Optical Fiber-Based Corrosion Detection Sensor Based On Laser Light Reflection, Manjunatha Shenoy Jan 2010

Development Of An Optical Fiber-Based Corrosion Detection Sensor Based On Laser Light Reflection, Manjunatha Shenoy

Mechanical and Aerospace Engineering Theses - Archive

Corrosion plays a detrimental effect on the structural integrity of many engineering structures. It can compromise the safe operation of these structures by forming corrosion pits that deteriorates the structural surfaces and causes stress concentrations. Therefore, it is critical that corrosions are detected before structural integrity is compromised and repair becomes economically prohibitive. However, corrosions usually occur at intricate places that are hard to inspect visually. Manual inspection of the structures for corrosions requires dismantling the structures, which incurs high maintenance costs and could potentially cause damage to the components. One approach to reduce this cost is to detect and …

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An Integration Of A Modern Flight Control System Design Technique Into A Conceptual Design Stability And Controls Tool, Aeromech, Amen Omoragbon Jan 2010

An Integration Of A Modern Flight Control System Design Technique Into A Conceptual Design Stability And Controls Tool, Aeromech, Amen Omoragbon

Mechanical and Aerospace Engineering Theses - Archive

The aircraft conceptual design (CD) phase is the most abstract, thus challenging phase of the entire aircraft design process. It is the responsibility of the CD engineer to identify and then to explore various aircraft concepts with the goal of arriving at the most promising concept for further evaluation. During this early design phase, the discipline stability and control tends to be underrepresented due to the lack of non-linear aerodynamic and inertia data. The methodology and software AeroMech is a vehicle configuration independent aircraft conceptual design stability and control tool, developed to help the conceptual designer to address stability and …

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"Why Didn't They Ask Us?": Memories Of Muslim Young Adults In Public Schools In The U. S. September 11, 2001, Jean Surratt Humphreys Jan 2010

"Why Didn't They Ask Us?": Memories Of Muslim Young Adults In Public Schools In The U. S. September 11, 2001, Jean Surratt Humphreys

Public Affairs Dissertations - Archive

Where were you on September 11, 2001? How did that day change your life? How would you remember September 11, 2001 if you were a young Muslim in the United States during this time, if you become the "enemy"? Young adult Muslims are different from their older generation and from other young religious adults, having become more religious in their twenties. This study focuses on perceived Islamophobia that Muslim students report encountering in public schools, as well as in the larger community, particularly while traveling, resulting from public policies in response to September 11, specifically the Patriot Act. The methodology …

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Understanding Gentrification: The Role And Abilities Of Community-Based Organizations In Changing Neighborhoods - A Case Study Of Post-Katrina New Orleans -, Myung-Ji Bang Jan 2010

Understanding Gentrification: The Role And Abilities Of Community-Based Organizations In Changing Neighborhoods - A Case Study Of Post-Katrina New Orleans -, Myung-Ji Bang

Planning Theses - Archive

The goal of this study is to identify the roles and barriers of community-based organizations in post-disaster changing neighborhoods and to examine how community based organizations support residents in dealing with neighborhood change through the case of New Orleans, Louisiana following Hurricane Katrina. Drawing on a review of existing reports and conducting surveys with community-based organizations, this study first identifies how community-based organizations support existing residents and attempts to gauge the role of these organizations in representing low-income residents in New Orleans, LA after Katrina, 2005. I focus in particular on the potential role and the ability of community-based organizations--not …

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Examining Individual Student Success Through The Lens Of New Institutional Economics In An Urban Public School District : The Great Graduation Gamble, Arvell Lynn Dehart Jan 2010

Examining Individual Student Success Through The Lens Of New Institutional Economics In An Urban Public School District : The Great Graduation Gamble, Arvell Lynn Dehart

Public Affairs Dissertations - Archive

In a perfect world, neo-classical economics and rational theory make sense. But in this imperfect world this paper has turned to Oliver Williamson and his understanding of New Institutional Economics to help us make sense. NIE helps explain institutions and organizations and their role in creating and shaping contracts that fit a very diverse institutional, organizational and human landscape. NIE provides a new lens to examine institutions as diverse as politics and as rigid as economics. Yet, one critical institution has yet to be examined through that lens. That institution is Public Education. It is that examination which this paper …

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Alternative Matching Schemes For Automatic Fingerprint Identification Systems, Michael Jason Futer Jan 2010

Alternative Matching Schemes For Automatic Fingerprint Identification Systems, Michael Jason Futer

Electrical Engineering Theses - Archive

Biometrics is a recognition technology that uses the unique behavioral and physiological traits of the human body as identifiers. The fingerprint is one of the oldest and most widely used forms of biometric identifiers. In this thesis, an automatic fingerprint identification system designed by a previous Electrical Engineering graduate student at The University of Texas at Arlington is upgraded with the purpose of improving matching accuracy. A review of the baseline automatic fingerprint identification system is provided as a reference point for improvements in the system. Then, improvements to the image enhancement stage of the baseline system are discussed. They …

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A Ph Sensor Based On A Flexible Substrate, Wen-Ding Huang Jan 2010

A Ph Sensor Based On A Flexible Substrate, Wen-Ding Huang

Electrical Engineering Dissertations - Archive

pH sensor is an essential component used in many chemical, food, and bio-material industries. Conventional glass electrodes have been used to construct pH sensors, however, have some disadvantages. Glass electrodes are easily affected by alkaline or HF solution, they require a high input impedance pH meter, they often exhibit a sluggish response. In some specific applications, it is also difficult to use glass electrodes for in vivo biomedical or food monitoring applications due to the difficulty of size miniaturization, planarization and polymerization based on current manufacturing technologies. In this work, we have demonstrated a novel flexible pH sensor based on …

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Distribution Network Contingency Analysis And Contingency Detection With The Consideration Of Load Models, Qiaohui Hu Jan 2010

Distribution Network Contingency Analysis And Contingency Detection With The Consideration Of Load Models, Qiaohui Hu

Electrical Engineering Dissertations - Archive

The electric utility market environment has changed quite radically during recent years due to the process of deregulation. This has changed the asset management towards a capital controlled business where owners are trying to maximize their profits with cost optimization. To keep up with the increase demands on high reliability and high quality delivery systems, many utilities endeavor to rationalize their system operations with more intelligent control schemes and facilities. A lot of issues under uncertainty such as load growth, quality of supply and environmental impact affect the reliability of the distribution system. Power outage is the most serious challenge …

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Does Our Perception Of God Influence Our Perception Of Subjectively "Sinful" Behaviors?, Ronen Cuperman Jan 2010

Does Our Perception Of God Influence Our Perception Of Subjectively "Sinful" Behaviors?, Ronen Cuperman

Psychology Dissertations - Archive

The current study investigated the influence of different perceptions of God (i.e., loving vs. punishing) on participants' attitudes towards subjectively "sinful" behaviors. Participants in the current study were 158 undergraduate students from The University of Texas at Arlington. Participants were instructed to complete the sentence scrambling task (Srull & Wyer, 1979), which was intended to prime them with different images of God. Once they completed the priming task, each participant filled out a questionnaire, which assessed their attitudes towards subjectively "immoral" behaviors. The results showed that regardless of the valence in each sentence, participants who were primed with the presence …

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Prevalence, Risk Factors And Treatment Outcomes For Various Musculoskeletal Injury Sites Associated With The Development Of Chronic Occupational Disability, Krista J. Howard Jan 2010

Prevalence, Risk Factors And Treatment Outcomes For Various Musculoskeletal Injury Sites Associated With The Development Of Chronic Occupational Disability, Krista J. Howard

Psychology Dissertations - Archive

The objective of this study was to identify the prevalence, risk factors and treatment outcomes for patients with various chronic disabling occupational musculoskeletal disorders (CDOMD) seeking tertiary treatment. The majority of the research available on CDOMD has focused on patients with chronic lumbar injuries. This current study evaluated patients with chronic upper extremity, cervical, lower extremity and multiple site musculoskeletal disorders in comparison to those with lumbar disorders. The participants in this study consisted of 3,492 patients entering a regional functional restoration program between the years 1997-2007. A series of univariate and multivariate statistical analyses were conducted to identify any …

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Tracking Stellar Activity Enhancements Due To A Close-In Giant Planet In The Hd 179949 System, Levent Gurdemir Jan 2010

Tracking Stellar Activity Enhancements Due To A Close-In Giant Planet In The Hd 179949 System, Levent Gurdemir

Physics Theses - Archive

We monitored CaII H and K lines (3933Å and 3968Å) of the HD 179949 system to study Planet Induced Emission (PIE) as an effect of star-planet interaction. We obtained high resolution spectra (R > 50,000) with high signal-to-noise ratio (S/N > 50 in the Ca II H and K cores) during 10 nights of observation at the McDonald Observatory. Wide band Echelle spectra covering full optical bandwidth (3,400-10,900Å) were obtained using 2.7 m Harlan J. Smith Telescope located at Mt. Locke. Detailed statistical analyses performed both for H and K cores of calcium to reveal the nature of the fluctuation in the …

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Imbalance Response Of A Four Degree Of Freedom Rigid Rotor Supported By Hybrid Three Pad Air Foil Bearing, Prajwal Krishna Shetty Jan 2010

Imbalance Response Of A Four Degree Of Freedom Rigid Rotor Supported By Hybrid Three Pad Air Foil Bearing, Prajwal Krishna Shetty

Mechanical and Aerospace Engineering Theses - Archive

Air foil bearings (AFB's) are widely used in small to midsized turbomachinery. They provide safer, cleaner and cheaper bearing operation. They are simple in construction, offer very low drag friction and have very high reliability at high speed operations. A major advantage of air foil bearings compared to conventional rigid surface bearings is their superior dynamic performance in rotor bearing systems. Since there is no contact between the rotor and bearing surface, the air foil bearings have a higher service life compared to rigid surface bearings. Hybrid AFB's operate under both hydrodynamic and hydrostatic condition. The present study is a …

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Evaluation Of Trenchless Renewal Methods For Potable Water Distribution Pipes, Abhay A. Jain Jan 2010

Evaluation Of Trenchless Renewal Methods For Potable Water Distribution Pipes, Abhay A. Jain

Civil Engineering Theses - Archive

Undoubtedly, potable water pipes, as part of an underground infrastructure system, play a key role in maintaining quality of life, health and well being of human kind. As these potable water pipes reach the end of their useful life, they create high maintenance costs, loss of flow capacity, decreased water quality, and increased dissatisfaction. Trenchless renewal methods (TRMs) are a medium to renew deteriorated potable water pipes, thus decreasing leakage loss, emergency maintenance costs and customer complaints. TRMs also maintain the quality of the water leaving the treatment plant. America's drinking water systems faces an annual shortfall of at least …

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An Investigation Of Productivity Loss Due To Outdoor Noise Conditions, Shripad Dilip Maldikar Jan 2010

An Investigation Of Productivity Loss Due To Outdoor Noise Conditions, Shripad Dilip Maldikar

Civil Engineering Theses - Archive

Most people in day to day life at one time or other get irritated or distracted by surrounding noises. The irritation might have resulted in minor aggravation or may have been dramatic enough to hinder their work. This leads us to think whether there are any losses in the efficiency of construction workers due to surrounding varying noise conditions, or if they naturally adjust to their acoustic environment. In an effort to answer this question, this study on productivity loss due to varying sound conditions was conducted. It was found that, the efficiency of laborers was inversely proportional to the …

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A Discourse Analysis Of The Periphrastic Imperfect In The Greek New Testament Writings Of Luke, Carl E. Johnson Jan 2010

A Discourse Analysis Of The Periphrastic Imperfect In The Greek New Testament Writings Of Luke, Carl E. Johnson

Linguistics & TESOL Dissertations - Archive

Motivated by Bloomfield's belief that linguistic variation is not without motivation, this paper seeks to determine the distinction between the morphological imperfect and periphrastic imperfect of Koine Greek within the New Testament writings of Luke.This study suggests that: 1. The periphrastic imperfect occurs only within narrative sections of the New Testament and is most prominent in the writings of Luke.2. The number of periphrastic imperfects has been recently over reported.3. The periphrastic imperfect is a more marked form of Koine Greek which developed in accordance with general rules of grammaticalization.4. The discourse function of periphrastic imperfects has not been previously …

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A Revised Phonology Of Kabiye Segments And Tone, Cecile Mamalinani Padayodi Jan 2010

A Revised Phonology Of Kabiye Segments And Tone, Cecile Mamalinani Padayodi

Linguistics & TESOL Dissertations - Archive

This study suggests revisions to the segmental and tonal phonology of Kabiye following a reanalysis of consonants, vowels, and tones in the speech of 7 male native speakers. Acoustic investigations are also included to illustrate some phonetic aspects of segments and tone. Data were elicited through three speech styles - wordlists, short phrases, and storytelling - later transcribed and analyzed. Revisions are made to the phonetic and phonemic inventories of consonants and vowels, as well as to the inventories of the underlying tonal melodies on noun roots, verb roots, and noun suffixes, as indicated by the results of the current …

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The Translator's Assistant: A Multilingual Natural Language Generator Based On Linguistic Universals, Typologies, And Primitives, Tod Jay Allman Jan 2010

The Translator's Assistant: A Multilingual Natural Language Generator Based On Linguistic Universals, Typologies, And Primitives, Tod Jay Allman

Linguistics & TESOL Dissertations - Archive

The Translator's Assistant (TTA) is a multilingual natural language generator (NLG) designed to produce initial drafts of translations of texts in a wide variety of target languages. The four primary components of every NLG system of this type are 1) the ontology, 2) the semantic representations, 3) the transfer grammar, and 4) the synthesizing grammar. This system's ontology was developed using the foundational principles of Natural Semantic Metalanguage theory. TTA's semantic representations are comprised of a controlled, English influenced metalanguage augmented by a feature system which was designed to accommodate a very wide variety of target languages. TTA's transfer grammar …

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Physics Of Luminescence Nanomaterials, Boon Kuan Woo Jan 2010

Physics Of Luminescence Nanomaterials, Boon Kuan Woo

Physics Dissertations - Archive

Luminescence oxide nanoparticles have tremendous potential in revolutionizing many interesting applications in today's emerging cutting-edge optical technology such as solid state lighting, biomedical labeling, imaging, photodynamic activation and radiation detection. In the early parts of this thesis, we synthesized two types of luminescence oxide nanoparticles, namely zinc oxide and gadolinium oxide in the hope of investigating their optical properties and to gain a deeper understanding in determining the relationship in between the ZnO's surface defect emission and its excitonic emission. We also investigated the luminescence properties of rare-earth dopants such as Ce³⁺ and Eu³⁺ doped into the host gadolinium oxide …

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A Study On The Corrosion Behavior Of Nanocrystalline Nickel In Aqueous Environments, Anjana Shyam Sundar Jan 2010

A Study On The Corrosion Behavior Of Nanocrystalline Nickel In Aqueous Environments, Anjana Shyam Sundar

Material Science and Engineering Theses - Archive

Nanocrystalline materials possess considerably enhanced properties arising from their small grain size. Significant interest has been paid in the past to their mechanical and physical properties. Very little attention has been attracted by their electrochemical behavior, which is expected to be affected by the significant volume fraction of grain boundaries. In the present study, corrosion experiments were conducted in nanocrystalline nickel in two entirely different solutions in order to obtain a better understanding of its corrosion behavior. This is of particular interest to MEMS and NEMS devices where electroplated nanocrystalline nickel is the metal of choice. The corrosion behavior of …

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Determinants Of Implied Volatility Movements In Individual Equity Options, Christopher G. Angelo Jan 2010

Determinants Of Implied Volatility Movements In Individual Equity Options, Christopher G. Angelo

Finance and Real Estate Dissertations - Archive

In this study, I introduce a parsimonious model that explains implied volatility time series for individual stock options. The current state of risk management for individual equity options still seems to lack the presence of pertinent exogenous variables. This study suggests a few easily observable variables that can be used to explain the changes in implied volatilities of stock options. These variables can be used in the risk models in order to more accurately manage option positions for individual stocks. The first chapter provides a motivation for the VIX as the primary explanatory variable for changes in implied volatility. It …

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Sacred Sites As Hotspots For Biodiversity: The Three Sisters Cave Complex In Coastal Kenya, Kristian Metcalfe, Richard Ffrench-Constant, Ian Gordon Jan 2010

Sacred Sites As Hotspots For Biodiversity: The Three Sisters Cave Complex In Coastal Kenya, Kristian Metcalfe, Richard Ffrench-Constant, Ian Gordon

All Peer-Reviewed Publications

Sacred sites, particularly in forests, often form unofficial protected areas because their biodiversity is preserved and protected by the local people looking after the sites. Here, we survey the biodiversity of the Three Sisters Cave complex, a sacred site or kaya in a fragment of East African coastal forest in south-east Kenya. We show that, despite the tiny size of this non-gazetted forest reserve, it contains many of the threatened species of both flora (121 species) and fauna (46 species) representative of Kenya's coastal forest. Following the overexploitation and widespread destruction of coastal rainforests in Kenya, such sacred sites represent …

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Nestmate Recognition And The Role Of Cuticular Hydrocarbons In The African Termite Raiding Ant Pachycondyla Analis, Abdullahi A. Yusuf, Christian W.W. Pirk, Robin M. Crewe, Peter G.N. Njagi, Ian Gordon, Baldwyn Torto Jan 2010

Nestmate Recognition And The Role Of Cuticular Hydrocarbons In The African Termite Raiding Ant Pachycondyla Analis, Abdullahi A. Yusuf, Christian W.W. Pirk, Robin M. Crewe, Peter G.N. Njagi, Ian Gordon, Baldwyn Torto

All Peer-Reviewed Publications

Cuticular hydrocarbons (CHCs) are used for chemical communication among nestmates in many ant species, and they may play a role in the discrimination of nestmates and non-nestmates. Using the mandible opening response (MOR) bioassay, we tested the response of the African termite raiding ant, Pachycondyla analis, to CHC extracts of nestmates and non-nestmates. The ants were able to distinguish control chemical cues, from nestmate CHCs, and from non-nestmate CHCs, and, based on a CHC recognition threshold, aggression was demonstrated toward non-nestmates. Gas chromatography (GC) and GC-mass spectrometric analyses showed that CHC components of different ant colonies had chain lengths ranging …

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Central Bank Liquidity Swap Data, Federal Reserve System: Board Of Governors Jan 2010

Central Bank Liquidity Swap Data, Federal Reserve System: Board Of Governors

Documents

data describing each swap the Fed conducted

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