Digital Commons Network^™

Evers-Williams Returns To Um Friday For 'Day Of Dialogue', Deborah A. Purnell

University of Mississippi News

No abstract provided.

Harper Johnson Jr. Fondly Remembered For His Generosity And Support Of Education, Edwin Smith

University of Mississippi News

No abstract provided.

The View From Ventress - 2012, University Of Mississippi. College Of Liberal Arts

Liberal Arts Newsletters

Special Section: Beloved Professors. Jere Allen, Alexander Lee Bondurant, Vaughn Grisham, Ed Keiser, Eldon Miller, Charles Noyes, John Pilkington, James Silver, Sheila Skemp, Russell Stokes, Lucy Turnbull, John Winkle, Kwang Yun

Performance Analysis Of Diversity Techniques In Wireless Communication Systems: Cooperative Systems With Cci And Mimo-Ofdm Systems, Mohammed Akhoirshida

Electronic Theses and Dissertations

This Dissertation analyzes the performance of ecient digital commu- nication systems, the performance analysis includes the bit error rate (BER) of dier- ent binary and M-ary modulation schemes, and the average channel capacity (ACC) under dierent adaptive transmission protocols, namely, the simultaneous power and rate adaptation protocol (OPRA), the optimal rate with xed power protocol (ORA), the channel inversion with xed rate protocol (CIFR), and the truncated channel in- version with xed transmit power protocol (CTIFR). In this dissertation, BER and ACC performance of interference-limited dual-hop decode-and-forward (DF) relay- ing cooperative systems with co-channel interference (CCI) at both the relay …

Infrasound As Upper Atmospheric Monitor, Jelle Daniel Assink

Electronic Theses and Dissertations

Understanding and specification of the higher altitudes of the atmosphere with global coverage over all local times is hampered by the challenges of obtaining direct measurements in the upper atmosphere. Methods to measure the properties of the atmosphere above the stratopause is an active area of scientific research. In this thesis, we revisit the use of infrasound as a passive remote sensing technique for the upper atmosphere. Signals from the Tungurahua volcano in Ecuador are used to investigate the behavior of the upper atmosphere. Depending on the atmospheric conditions, stratospheric, mesospheric and thermospheric arrivals are observed during intervals of explosive …

Contributions To Robust Methods: Modified Rank Covariance Matrix And Spatial-Em Algorithm, Kai Yu

Electronic Theses and Dissertations

Classical multivariate statistical inference methods including multivariate analysis of variance, principal component analysis, factor analysis, canonical correlation analysis are based on sample covariance matrix. Those moment-based techniques are optimal (most efficient) under the normality distributional assumption. They are, however, extremely sensitive to outlying observations, susceptible to small perturbation in data and poor in the efficiency for heavy-tailed distributions. A straightforward treatment is to replace the sample covariance matrix with a robust one. Visuri et al. (2000) proposed a technique for robust covariance matrix estimation based on different notions of multivariate sign and rank. Among them, the spatial rank based covariance …

Horizons, Holography And Hydrodynamics, Arif Mohd

Electronic Theses and Dissertations

In this dissertation we study black-hole horizons in general relativity and in Gauss-Bonnet gravity. We generalize Wald's "black-hole entropy is the Noether charge" construction to the first-order formalism of these theories. Next we construct the "membrane paradigm" for black objects in Gauss-Bonnet gravity and demonstrate how the horizon can be vieas a membrane with fluidlike properties. Holography is invoked to relate the transport coefficients obtained for the horizons in the membrane paradigm with the transport coefficients which describe the hydrodynamic limit of the boundary gauge theory.

Save Wisely, Spend Happily : Real Stories About Money & How To Thrive From Trusted Advisors, Sharon L. Lechter

Guides, Handbooks and Manuals

No abstract provided.

Understanding Business Valuation : A Practical Guide To Valuing Small To Medium-Sized Businesses, Gary R. Trugman

Guides, Handbooks and Manuals

No abstract provided.

Optimization And Development Of In Vitro Bioassays To Determine Structure-Activity Relationships For Cannabinoid Receptor 1 And Cannabinoid Receptor 2, Afeef Husni

Electronic Theses and Dissertations

Cannabis has been around for thousands of years and has been used recreationally, medicinally, and for fiber. Over 400 compounds have been isolated from Cannabis sativa with approximately 100 being cannabinoids. Of those 100 compounds, Δ9-THC has been determined as the primary constituent, which is also responsible for the psychoactivity associated with Cannabis. Along with Δ9-THC, cannabidiol has been studied in depth for its therapeutic effects. This has currently been the focus of many researchers since cannabidiol does not cause psychotropic effects.

Cannabinoid receptors belong to the large superfamily of G protein-coupled receptors (GPCRs). Approximately 30% of marketed drugs target …

Accelerating The Performance Of A Novel Meshless Method Based On Collocation With Radial Basis Functions By Employing A Graphical Processing Unit As A Parallel Coprocessor, Derek Owusu-Banson

Electronic Theses and Dissertations

In recent times, a variety of industries, applications and numerical methods including the meshless method have enjoyed a great deal of success by utilizing the graphical processing unit (GPU) as a parallel coprocessor. These benefits often include performance improvement over the previous implementations. Furthermore, applications running on graphics processors enjoy superior performance per dollar and performance per watt than implementations built exclusively on traditional central processing technologies. The GPU was originally designed for graphics acceleration but the modern GPU, known as the General Purpose Graphical Processing Unit (GPGPU) can be used for scientific and engineering calculations. The GPGPU consists of …

Implementation Of A Software Defined Spread Spectrum Communication System, Mir Ali

Electronic Theses and Dissertations

The goal of this thesis is to develop a framework to prototype a software defined direct sequence spread spectrum transceiver that can be used as a node in an ad hoc network. We introduce the concept of a software radio, the current state of art, and GNU Radio and its concepts. We discuss in detail the design and development methods of GNU Radio and develop a flowgraph in Python to demonstrate the method of development. We present a mathematical analysis of (DSSS) modulation and demodulation schemes along with the transmitter and receiver design. We use this design to develop an …

Elemental And Isotopic Analysis Of Sediments From Oxbow Lakes In The Mississippi Delta, Pragya Chakravarty

Electronic Theses and Dissertations

No abstract provided.

Comparison Of Apple's Ios 5 And Android For Mobile Applications Development: A Developer's Perspective, Estela Pochintesta

Electronic Theses and Dissertations

Body composition, or the proportion of fat, muscle, and bone of an individual's body, is an important indication of health status. Numerous techniques can be used to assess body composition, producing varied results and measurements. For individuals with insufficient or excessive amounts of body fat, accurate assessment of body composition is crucial. Two commonly used techniques for measuring body composition are air displacement plethysmography (adp) and dual-energy x-ray absorptiometry (dxa). Past research has been conducted, comparing adp and dxa, but the results are inconsistent. The majority of past studies found that, when compared to dxa, adp underestimated body fat percentage, …

Determination Of Cutoff Frequencies Of Simple Waveguides Using Finite Difference Method, Sridhar Kolagani

Electronic Theses and Dissertations

No abstract provided.

Room Temperature Ionic Liquid (Rtil) Membranes For Bio-Methane Dehumidification, Ryan Amos

Electronic Theses and Dissertations

Renewable fuels are heavily researched due to the increasing price of and resulting pollution from fossil fuels. The production of useable energy from waste—animal, sewage, discarded food, landfill matter would be a valuable renewable fuel production method. Biogas is a renewable fuel that is produced by anaerobic digestion, composed mainly of methane, carbon dioxide and small percentages of hydrogen sulfide and water vapor. Before this biogas—predominately bio-methane—can be converted to fuel, it must be dehumidified to become useable. Typically membrane-based gas dehumidification uses hydrophilic polymer membrane materials, such as polydimethylsiloxane (PDMS) and cellulose acetate (CA). The main problems with polymer …

Synthesis And Characterization Of Nickel Complexes With Relevance To Nickel Acireductone Dioxygenase And Nickel Superoxide Dismutase, Margo Nicole Montgomery

Electronic Theses and Dissertations

This research presents an investigation of synthetic model complexes with relevance to the active site of Ni(II) acireductone dioxygenase (Ni-ARD) and Ni(II) superoxide dismutase (Ni-SOD). Acireductone dioxygenases (ARDs) are a unique set of enzymes found in the methionine salvage pathway that catalyze the oxidation reaction of acireductone (1, 2-dihydroxy-3-oxo-5-(methylthio)pent-1-ene). These enzymes share a compolypeptide sequence but bind different metal ions, Ni2+ or Fe2+, at the active site. The Ni-ARD enzyme is responsible for the off pathway shunt in the pathway. Using the tridentate nitrogen donor ligands hydrotris(3,5-dimethyl-1-pyrazolyl)borate (Tp*) and the newly developed tris(1, 2-dimethyl-4-imadozyl)carbinol, (4-TICMe, Me) several reactions involving the …

Theoretical And Spectroscopic Studies Of Molecular Systems For Charge Transfer And Energy Storage And Transfer, Debra Scardino

Electronic Theses and Dissertations

Efficient charge transfer and energy storage and transfer have become increasingly important in many areas of research and development. This is especially true for the development of optoelectronic devices, molecular electronics, and solar voltaic cells. Characterization of the photophysical properties of new molecular systems for these applications has emerged as an important field of research. Many molecular building blocks have been developed and understanding the properties of these systems at a fundamental level is essential for their successful implementation. This dissertation focuses on experimental and theoretical studies of some of these newly-developed molecular systems. Oxygen substituted dihydrobenzvalene is studied theoretically …

Using Geophysics To Evaluate Levee Stability, Laura Mcconnell Dalton

Electronic Theses and Dissertations

Shallow slough slides have occurred along the river \side slope of Mississippi River Levees for over sixty years. Shallow slough slides also occur along smaller levees that protect tributaries of the Mississippi River. This investigation takes place along a section of the Coldwater River Levee, a tributary levee of the Mississippi River. Field observation, soil samples, and geophysical data were collected at two field sites located on the border of Tate and Tunica County, MS. The first site consists of a developed shallow slough slide that had occurred that has not yet been repaired and the second site is a …

Tensor Products Of Vector Seminormed Spaces, John William Dever

Electronic Theses and Dissertations

A vector seminormed space is a triple consisting of a vector space, a Dedekind complete Riesz space, and a vector valued seminorm, called a vector seminorm, defined on the vector space and taking values in the Riesz space. The collection of vector seminormed spaces with suitably defined morphisms is shown to be a category containing finite products. A theory of vector seminorms on the tensor products of vector seminormed spaces is developed in analogy with the theory of tensor products of Banach spaces. Accordingly, a reasonable cross vector seminorm, or simply tensor seminorm, is defined such that a vector seminorm …

A Longitudinal Analysis Of Changes In Accounting Curriculum Requirements Since The Perry Commission Report, William Homer Black

Electronic Theses and Dissertations

This dissertation develops a consistent structure that documents the state of undergraduate and graduate accounting education in the United States and how it has changed from the 1960s to the present. It includes a literature review that summarizes major developments affecting accounting education to provide a historical context relevant to current efforts to accomplish educational change. The analysis identifies patterns in educational requirements and compiles information that may instruct educational policy discussions. It considers the recommendations of the Beamer Committee, policy statements of the AICPA, and the influences of accounting accreditation and the move to 150-hour educational requirements. In combination, …

Use Of Georphysics To Map Subsurface Features At Levee Seepage Locaitons, Thomas Chapman Brackett

Electronic Theses and Dissertations

The Great Flood of 2011 caused moderate to severe seepage and piping along the Mississippi River levees in Northwest Mississippi. The aim of this thesis was to implement geophysical techniques at two seepage locations in order to give a better understanding of the causes of underseepage and information on how to mitigate the problem. Sites near Rena Lara in Coahoma County and near Francis in Bolivar County were chosen to conduct this survey. Electrical Resistivity Tomography (ERT) and Electromagnetic Induction (EM) surveys were conducted on and adjacent to levees to identify seepage pathways and any dominant geological features at the …

Inspection Of Earthen Embankment Dams Using Time Lapse Electrical Resistivity Tomography, Jared Stewart Case

Electronic Theses and Dissertations

According to the National Inventory of Dams (NID), the number of dams across the United States is approximately 85,000. Many of these dams are more than 50 years old and need vast attention to ensure their safety. It is difficult to obtain a full assessment of the dam just by visual inspections alone. This is because many problems associated with dam failure occur internally, which makes it difficult to be observed by the dam inspectors. Examples of these flaws are piping and seepage (flow of water through or around dam walls). It is in this area where geophysical methods can …

On The Nature Of Weak Intermolecular Forces: A First Principles Approach To Hydrogen Bonding And Pi-Type Interactions, Kari Lorene Copeland

Electronic Theses and Dissertations

Computational quantum chemistry is a branch of chemistry that is based on quantum mechanics. In this field, chemical phenomena is represented in mathematical form and computers are used to provide numerical solutions to rigorous mathematical equations. Through this medium, the properties of atoms and molecules are calculated with high accuracy. Chapter 1 opens with a general discussion of science, the development of atomic theory and computational chemistry. Electronic structure theory is more extensively reviein Chapter 2. Hydrogen bonding and dispersion forces are defined in Chapter 3, and the procedures used to computationally study these type interactions are considered. Chapter 4 …

Between God And Man: Community's Place In Virtue, Practical Reason, And Transcendent Good, Jordan Herz Davis

Electronic Theses and Dissertations

Talbot Brewer's Retrieval of Ethics and Robert Adams's Finite and Infinite Goods present distinct theories in ethics and metaethics. Brewer begins with the fundamental ethical perspective of the practical deliberator who experiences his practical deliberations as a continuous, unified, and constantly revised activity which begins with inchoate intimations of goodness and proceeds better or worse to understand and pursue the goodness which pervades his evaluative outlook. From this Brewer aims to account for how we achieve excellence in practical deliberation and arrive at a more tenable and self-consistent evaluative outlook which informs our ethical deliberations. Alternately, Adams begins in the …

Problems With Truth: Scope, Mixing, And Truth Pluralism, Christopher Dyer

Electronic Theses and Dissertations

In this paper, I will be taking up the debate between monistic and pluralistic inflationary theories of truth. Truth monism claims that there is one explanatory story which accounts for the truth of all and only true propositions. There seem to be, however, certain domains of discourse wherein monistic theories fail. If monistic theories cannot provide an explanation for how all true propositions are true, then they would not be adequate theories of truth. Truth pluralism is motivated to avoid the scope problem. The pluralist sees that there are as many truth properties as there are domains of discourse. A …

The Underrepresentation Of English Learners In Mississippi's Intellectually Gifted Education Program: A Framework For Change, Vicki Patterson-Davidson

Electronic Theses and Dissertations

School districts have been struggling with the challenges of educating English learners for decades, long before the enactment of the No Child Left Behind Act of 2001. Yet, considering the abundance of research on English learners, relatively few studies have examined specific methods or efforts of districts and schools to identify English learners for participation in an intellectually gifted education program. The purpose of this study was to determine if particular gifted education programming, or programming criteria, impacts this student population's identification for participation in Mississippi's intellectually gifted education program. Specifically, this study aimed to investigate the district- and school-level …

A Comparative Study Of Segmented Tungsten Rod Penetration Into A Thick Steel Target Plate, Michael Bryant Presnell

Electronic Theses and Dissertations

This thesis presents results from computational simulations of tungsten alloy segmented rod projectiles (SRP) penetrating an RHA semi-infinite target plate at high velocities. Penetration experimental data show improved penetration efficiency by the segmented projectiles when compared to monolithic (single solid rod) projectiles. For SRP with an aspect ratio (L/D) = 1/8, a loss in penetration efficiency was seen upon successive segment impacts. A numerical simulation impacting tungsten heavy alloy against RHA 4340 steel was performed using the Lagrangian finite element code EPIC 2006. The impact configuration that was modeled consisted of eight successive collinear impacts of discs measured 2mm in …

Simulation And Phases Of Macroscopic Particles In Vortex Flow, Heath Eric Rice

Electronic Theses and Dissertations

Granular materials are an interesting class of media in that they exhibit many disparate characteristics depending on conditions. The same set of particles may behave like a solid, liquid, gas, something in-between, or something completely unique depending on the conditions. Practically speaking, granular materials are used in many aspects of manufacturing, therefore any new information gleaned about them may help refine these techniques. For example, learning of a possible instability may help avoid it in practical application, saving machinery, money, and even personnel. To that end, we intend to simulate a granular medium under tornado-like vortex airflow by varying particle …

Two Trains Running: Capture And Escape In The Racialized Train Cars Of The Jim Crow South, 1893-1930, Raleigh Mixon Robinson

Electronic Theses and Dissertations

The role of the railroad in the modern American experience—and its role in making that experience modern—cannot be overstated. This thesis proposes to tell one of many possible railroad stories. By focusing on the historical and cultural relevance of a series of bodies in transit, I examine the implementation of railroad segregation law and the response by African-American performers. The thesis begins at the end of the nineteenth century with the Homer Plessy test case and continues across three decades, meeting along the way novelists Charles Chesnutt and James Weldon Johnson and musicians W. C. Handy, Henry "Ragtime Texas" Thomas, …