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Turkish Journal of Biology

No abstract provided.

Corrected Article: Exclusive Electroproduction Of ᵠ Mesons At 4.2 Gev [Physical. Rev. C 63, 065205, (2001)], M. Bektasoglu, L. Ciciani, G. E. Dodge, T. A. Forest, C. E. Hyde-Wright, S. E. Kuhn, L. M. Qin, F. Sabatié, L. B. Weinstein, Et Al., The Clas Collaboration

Physics Faculty Publications

We studied the exclusive reaction ep → e' p' ᵠ using the ᵠ →K⁺K^- decay mode. The data were collected using a 4.2 GeV incident electron beam and the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. Our experiment covers the range in Q² from 0.7 to 2.2 GeV²and W from 2.0 to 2.6 GeV. Taken together with all previous data, we find a consistent picture of ᵠ production on the proton. Our measurement shows the expected decrease of the t slope with the vector-meson formation time c Δ t …

Pervaporation Of Solvent Mixtures Using Polymeric And Zeolitic Membranes: Separation Studies And Modeling, Dhaval S. Shah

University of Kentucky Doctoral Dissertations

The separation characteristics of binary alcohol-water mixtures were studied overa wide range of feed concentration and temperature using polymeric and zeoliticpervaporation membranes. For the hydrophilic PVA membrane, the total flux (at 55 0C)for the ethanol-water system decreased from 0.45 to 0.05 kg/m2/hr as the feed ethanolconcentration was increased from 30 to 95 wt. %. The separation factor (water/ethanol)was found to increase by about 100 times for the same range of concentration. TheUNIQUAC theory was used to predict the activity of binary alcohol-water mixtures in thePVA membrane. The UNIQUAC theory successfully takes into account the nonidealitiespresent in the alcohol/water-PVA membrane system. …

Revision Programming: A Knowledge Representation Formalism, Inna Valentinovna Pivkina

University of Kentucky Doctoral Dissertations

The topic of the dissertation is revision programming. It is a knowledge representation formalismfor describing constraints on databases, knowledge bases, and belief sets, and providing acomputational mechanism to enforce them. Constraints are represented by sets of revision rules.Revision rules could be quite complex and are usually in a form of conditions (for instance, ifthese elements are present and those elements are absent, then this element must be absent). Inaddition to being a logical constraint, a revision rule specify a preferred way to satisfy the constraint.Justified revisions semantics assigns to any database a set (possibly empty) of revisions.Each revision satisfies the …

Datalog With Contraints: A New Answer-Set Programming Formalism, Deborah J. East

University of Kentucky Doctoral Dissertations

Knowledge representation and search are two fundamental areas of artificial intelligence. Knowledge representation is the area of artificial intelligence which deals with capturing, in a formal language, the properties of objects and the relationships between objects. Search is a systematic examination of all possible candidate solutions to a problem that is described as a theory in some knowledge representation formalism. We compare traditional declarative programming formalisms such as PROLOG and DATALOG with answer-set programming formalisms such as logic programming with stable model semantic. In this thesis we develop an answer-set formalism we can DC. The logic of DC is based …

Texture, Microstructure And Formability Of Aluminum Alloys, Xiang-Ming Cheng

University of Kentucky Doctoral Dissertations

Texture, microstructure and formability were studied in Direct Chill Cast (DC) and Strip Cast (SC) aluminum alloys with regard to crystallographic anisotropy, the Portevin-Le Chatelier effect and aging softening behavior. It was found that material properties change greatly with manufacturing processes (DC vs. SC) and chemical composition (3xxx vs. 5 xxx alloys). DC cast hot band materials are usually fully recrystallized and have strong softening textures while SC hot band materials have a rolling structure with strong deformation textures. Softening textures cause 90 earing while deformation textures result in 45 earing after deep drawing. During cold rolling, 90 earing in …

Crime Legends In Old And New Media, Pamela Donovan

Dissertations, Theses, and Capstone Projects

This project explores the contemporary meanings and persistence of the "crime legend." A case study approach was used: three crime legends with a considerable history of public debunking were chosen. These cases were: the market in snuff films, the theft of vital organs for black-market transplant, and the abduction of children from theme park restrooms. Current versions circulating in Internet newsgroups and via electronic mail lists were collected. Discussions in Internet newsgroups were examined and twenty regular newsgroup participants were interviewed. The public newsgroup communication environment is such that salience is established by the interlocutors themselves, rather than by the …

Development And Characterization Of Velocity Workspaces For The Human Knee., John Eric Fuller

LSU Historical Dissertations and Theses

The knee joint is the most complex joint in the human body. A complete understanding of the physical behavior of the joint is essential for the prevention of injury and efficient treatment of infirmities of the knee. A kinematic model of the human knee including bone surfaces and four major ligaments was studied using techniques pioneered in robotic workspace analysis. The objective of this work was to develop and test methods for determining displacement and velocity workspaces for the model and investigate these workspaces. Data were collected from several sources using magnetic resonance imaging (MRI) and computed tomography (CT). Geometric …

Effects Of Lipids, Amino Acids, And Beta-Cyclodextrin On Gelatinization, Pasting, And Retrogradation Properties Of Rice Starch., Xiaoming Liang

LSU Historical Dissertations and Theses

The primary purpose of this study was to determine the addition of lipids, amino acids, and beta-cyclodextrin effects on commercial rice starch gelatinization, pasting, and retrogradation properties by using differential scanning calorimetry (DSC), rapid visco analysis (RVA), and x-ray diffractometry (XRD). Analyses from commercial rice starch showed that the presence of 0.6% monopalmitin (MP) increased the peak viscosity (PV), minimum viscosity (MV), and final viscosity (FV) by 38, 27, and 72 RVU respectively. The pasting temperature was also increased by 6°C, whereas the total setback (TSB) was increased by 45 RVU. Incorporation of lysophosphatidylcholine (LC) and lysophosphatidylethanolamine (LE) also showed …

Molecular Systematics Of Eastern Cottonwood Using Aflp And Rapd Markers., Xiaohong Ma

LSU Historical Dissertations and Theses

Eastern cottonwood (Populus deltoides Bartr.) is the fastest growing tree in southeastern United States with great potential as a biomass source. DNA-based molecular marker techniques are playing increasingly important roles in elucidating genetic diversity within species. Amplified fragment length polymorphism (AFLP) and random amplified polymorphic DNA (RAPD) markers were employed to study genetic relationships among 57 clones from subregion Lower Mississippi river, West Central, and West Gulf. A total of 101 polymorphic RAPD markers were amplified from 14 primers. Six AFLP primer pairs resulted in a total of 457 polymorphic markers. Both RAPD and AFLP markers were able to uniquely …

Compression Of Three-Dimensional Magnetic Resonance Brain Images., Xiaojun Qi

LSU Historical Dissertations and Theses

Losslessly compressing a medical image set with multiple slices is paramount in radiology since all the information within a medical image set is crucial for both diagnosis and treatment. This dissertation presents a novel and efficient diagnostically lossless compression scheme (predicted wavelet lossless compression method) for sets of magnetic resonance (MR) brain images, which are called 3-D MR brain images. This compression scheme provides 3-D MR brain images with the progressive and preliminary diagnosis capabilities. The spatial dependency in 3-D MR brain images is studied with histograms, entropy, correlation, and wavelet decomposition coefficients. This spatial dependency is utilized to design …

Production, Process Design And Quality Characterization Of Catfish Visceral Oil., Subramaniam Sathivel

LSU Historical Dissertations and Theses

Between 45--55% of viscera, head, skin, intestine and slurries are generally generated as byproducts or waste from catfish filleting process. Our preliminary study showed that the crude fat content of the whole catfish viscera was 30--35% (wet basis) and the total o-3 fatty acids of oils recovered from the whole and/or portioned viscera ranged from 4.3--20.9 mg/g (dry basis). Catfish viscera may serve as an excellent source of health-promoting oil. Yield of purified (deodorized) catfish visceral oil was 65.7% and contained considerable amounts of DHA (1.21 mg/g of oil) and omega-3 fatty acid (4.6 mg/g of oil). A rapid microwave-assisted …

Effects Of Nitric Oxide Synthase Inhibitors On Equine And Bovine Follicular Dynamics And Steroidogenesis., Carlos Roberto Fontes Pinto

LSU Historical Dissertations and Theses

Current scientific literature has shown that: (1) NO is a pro-ovulatory agent and inhibition of its production inhibits ovulation, and (2) NO has strong antisteroidogenic activity, especially on estradiol (E2) production by granulosa cells. The experiments described in this dissertation were designed to answer the following questions involving effects of NO on ovarian physiology: (1) is the inhibitory effect of nitric oxide synthase (NOS) inhibitors on ovulation irreversible (follicular atresia) or temporary (delayed ovulation)? and (2) what is the relationship between NO and hCG-induced preovulatory luteinization? Accordingly, cycling mares were subjected to treatment with NOS inhibitors (L-NAME or aminoguanidine) during …

Numerical Simulations Of Incompressible Flows In Complex Geometries., Konstantinos Vogiatzis

LSU Historical Dissertations and Theses

A mainly spectral code along with domain-decomposition, a combination that is not widely in use in complex problems, has been developed for the solution of the 3-D unsteady incompressible Navier-Stokes equations. The code uses fully spectral or a combination of spectral-collocation and finite difference approximations and a 3-step splitting time-marching scheme. The developed Poisson solver utilizes matrix diagonalization and incorporates a direct sub-structuring method based on the influence matrix technique. As a first step, laminar and turbulent confined flows were simulated, initially with DNS, then with LES, using a modified Smagorinksi model. The domain-decomposition technique and parallel implementation were tested …

Method Of Creating Ultra-Fine Particles Of Materials Using A High-Pressure Mill, Marian Mazurkiewicz

Mining Engineering Faculty Research & Creative Works

A method for creating ultra-fine particles of material using a high-pressure mill is described. The method includes placing a material in a first chamber and subjecting the material to a high-pressure liquid jet to divide it into particles. These particles are then transferred to a second chamber in which they are subjected to cavitation to further divide the particles into relatively smaller particles. These relatively smaller particles are then transferred to a third chamber, in which the particles collide with a collider to still further divide them into ultra-fine particles of the material. The mill of the present invention includes …

Activist Advertising: Case Studies Of United Colors Of Benetton's Aids -Related Company Promotion., Heidi Jolene Brough

LSU Historical Dissertations and Theses

This study explores how advertising and company promotion may be used to address social issues. In particular, I examine how the clothing company United Colors of Benetton attempted to position itself within the AIDS crisis. Specifically, this study investigates through case studies how the Benetton Group used activist advertising and company promotion to bring about social change concerning AIDS-related issues. I also attempt to account for the controversy that the promotion elicited through establishing the anomalous status of the company's promotion within traditional advertising efforts. The study begins with information concerning the AIDS crisis and AIDS activism and then moves …

A Comparison Of Faculty Perceptions Of University Technology Transfer By Level Of Institutional Success In The Technology Transfer Process., Paula T. Jacobi

LSU Historical Dissertations and Theses

The purpose of this study was to gather information concerning faculty perceptions of university technology transfer and to compare the perceptions of faculty towards university involvement in technology transfer activities by the relative success of the institutions in technology transfer. The objectives were to describe selected faculty at two land grant universities in the southern portion of the United States. The study was designed to describe faculty based on certain personal, professional, and demographic characteristics, and to compare faculty at an institution defined as successful in technology transfer and an institution that is relatively unsuccessful on certain selected measures. Participants' …

Neither Natchez Nor Tara: An Environmental Historial Geography Of The Upper Pearl River Basin Of Mississippi, Protohistoric Period To 1940., Frederick William Sunderman

LSU Historical Dissertations and Theses

This study examines the contrasting themes of land degradation and environmental stewardship of farming enterprises in the regional context of the Upper Pearl River Basin of Mississippi. Both the previous imagery and analysis of Southern Cotton Belt agriculture emphasize the profligate nature of farming practices. The contribution this study makes is to amend both the stock images and macro-analyses of Southern cotton culture. Analysis at the sub-regional level demonstrates that many farmers actually practiced sound land management techniques. Reconstructing the experiences of farmers in the Upper Pearl River Basin provides examples of ways in which regional distinctions amend widely conceived …

Reciprocal Dealing: A Rebirth?, Edward D. Cavanagh

St. John's Law Review

(Excerpt)

This article will examine the retooled reciprocity theory and the anticompetitive potential of reciprocal dealing practices under the law of (1) mergers, (2) monopolization, and (3) tying.

Comment On "Influence Of Fe³⁺/Fe2+ Ratio On The Crystallization Of Iron-Rich Glasses Made With Industrial Wastes", Chandra S. Ray, Mario Pelino, Alexander Karamanov

Materials Science and Engineering Faculty Research & Creative Works

No abstract provided.

Spontaneous, Non-Aqueous Electrochemical Deposition Of Copper And Palladium On Al And Al(Cu) Thin Films, R. Fang, H. Gu, Matthew O'Keefe, Thomas J. O'Keefe, W. S. Shih, K. D. Leedy, R. Cortez

Materials Science and Engineering Faculty Research & Creative Works

Copper and palladium seed layers have been successfully deposited from organic solutions onto patterned and unpatterned pure aluminum and Al (0.5%Cu) thin films using an immersion displacement process. The reaction occurs at ambient temperature and pressure by a spontaneous electrochemical mechanism. Copper and palladium deposition using the organic solution was studied as a function of reaction time and Cu or Pd concentration in the solution. It was found that both time and the initial ionic metal concentration significantly influence deposit morphology, particle size and shape, and adherence. Nucleation of Cu or Pd sub-micron particles on both Al and Al (Cu) …

Do Norms Matter?: A Cross-Country Evaluation, John C. Coffee Jr.

Faculty Scholarship

This Article starts with the recognition that the average private benefits of control vary significantly across countries. But why? The simplest explanation ascribes this variation to differences in law between jurisdictions: for example, the law of jurisdiction X could privilege controlling shareholders by allowing them to extract benefits from their corporation in the form of above-market salaries or non-pro-rata payments in connection with self-dealing transactions. But, this explanation cannot fit all cases. To illustrate, if the substantive law is essentially similar between two jurisdictions while the private benefits of control appear to be significantly different, then some other explanation must …

An Integrated Risk Analysis Methodology In A Multidisciplinary Design Environment, Katrina R. Hampton

Engineering Management & Systems Engineering Theses & Dissertations

Design of complex, one-of-a-kind systems, such as space transportation systems, is characterized by high uncertainty and, consequently, high risk. It is necessary to account for these uncertainties in the design process to produce systems that are more reliable. Systems designed by including uncertainties and managing them, as well, are more robust and less prone to poor operations as a result of parameter variability.

The quantification, analysis and mitigation of uncertainties are challenging tasks as many systems lack historical data. In such an environment, risk or uncertainty quantification becomes subjective because input data is based on professional judgment. Additionally, there are …

High Precision Solder Droplet Printing Technology: Principle And Applications, Qingbin Liu, M. Orme, Ming-Chuan Leu

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Solder droplet printing technology, which is low-cost, noncontact, flexible, data-driven, and environmentally friendly, has emerged as an enabling technology for precisely placing fine solder deposits on a variety of small substrates. It is suitable for a variety of applications including direct chip attach site preparation, 3D substrates, fine line interconnect, substrate via fill, optoelectronics and many others. It enables manufacturing techniques that are impossible or unfeasible with current technology, such as localized replacement of solder on board, depositing solder in different thicknesses on the same board, or using more than one type of solder on the same board. This makes …

An Optimal Control Based Treatment Strategy For Parturient Paresis Using Neural Networks, Radhakant Padhi, S. N. Balakrishnan

Mechanical and Aerospace Engineering Faculty Research & Creative Works

An optimal online feedback treatment strategy is developed for the parturient paresis of cows, based on nonlinear optimal control theory. A limitation in the development of an existing mathematical model for calcium homeostasis is addressed and the model is extended to incorporate control inputs. An optimal feedback controller is synthesized for the nonlinear system using neural networks. Though the main aim of this paper is to solve the biomedical control problem, the methodology presented in this paper is a general computational tool, which can be applied to solve a fairly general class nonlinear optimal control problems.

Kinetic And Mechanistic Studies Of A Bimetallic Hydroformylation Catalyst., Novella Nicole Bridges

LSU Historical Dissertations and Theses

Dicationic bimetallic rhodium complexes based on the novel binucleating tetraphosphine ligand system racemic-Et2PCH2CH 2P(Ph)CH2P(Ph) CH2CH2PEt2, et,ph-P4, are highly active and selective hydroformylation catalysts that make use of bimetallic cooperativity to operate. In situ FT-IR and NMR studies indicate that the most active catalyst is the unique dinuclear dicationic hydrido-carbonyl Rh(+2) oxidation state complex, [racemic-Rh 2H2(mu-CO)2(CO)2(et,ph-P4) 2+]. A kinetic study was performed to determine the rate orders of the dinuclear dicationic catalyst, and the substrate (1-hexene). The rate orders were found to be one for both components. The study was also performed to test the hypothesis of a bis-acyl species, which …

Coming Home: Black Return Migration To The Yazoo -Mississippi Delta., Robert Norman Brown Ii

LSU Historical Dissertations and Theses

Between 1910 and 1970, African Americans moved out of South in one of the largest movements in human history. Today, many of these migrants, and their descendents, are coming home. Some estimates hold that more than nine million black Southerners left the South for new lives in the North and West. The migration reached its peak in the 1950s, and began to slow in the 1960s. In the early 1970s, African Americans began returning to the American South. With major shifts in the United States economy, a change that began in the early 1970s, jobs began to leave the traditional …

Characteristics And Use Of Thin Metals On Modified Glass Substrates., Sonya Latrice Caston Pierre

LSU Historical Dissertations and Theses

Ultra-thin films of Au are formed on glass by thermal evaporation of Au onto a silane-modified glass surface. Monolayers of 3-aminopropyltriethoxysilane on glass (APS/glass) are outstanding surfaces for the formation of adherent, electrically conductive, smooth, and highly oriented Au films. Scanning tunneling microscopy images indicate that ultra-thin Au films are highly conductive and have a significant {111} texture, and X-ray diffraction studies confirm the latter. In addition, Au films on APS/glass surface are not removed by tape tests, pointing to a strong chemical interaction between the Au and amine surface. Unlike metal adhesion promoters, APS layer does not diffuse through …

Design, Fabrication, And Testing Of Cross Flow Micro Heat Exchangers., Chad Randall Harris

LSU Historical Dissertations and Theses

Cross flow micro heat exchangers were designed to maximize heat transfer from a liquid (water) to a gas (air) for a given frontal area while holding the pressure drop across the heat exchanger of each fluid to values characteristic of conventional scale heat exchangers (car radiators). The cross flow micro heat exchanger design is unique since it produces a very high rate of heat transfer/volume between dissimilar fluids with low fluid pressure drops. Predicted performance for two types of cross flow micro heat exchangers is compared to each other and to current innovative car radiators. Although the cross flow micro …

Modified Mesoporous Silicates For Metal Adsorption., Allison Majorie Naquin

LSU Historical Dissertations and Theses

Mesoporous silica materials, commonly called Hexagonal Mesoporous Sieves (HMS), are used to adsorb copper, lead, and mercury from aqueous solution. To increase metal adsorption, organic ligands with high metal affinity are grafted to the surface of the HMS materials. Three ligands were used in this research: 3-mercaptopropyltrimethoxysilane (MP), 3-aminopropyltrimethoxysilane (AM), and p-(aminoethylaminomethyl)phenethyltrimethoxysilane (AB). The physical properties of HMS include large surface area and an ordered system of pores. These properties are believed to increase the extraction capabilities of the material by increasing the molar content of the chelating ligand and by making the ligand more accessible. The purpose of this …