Digital Commons Network^™

Chemical Evolution Of The Neutron-Rich Iron-Group Isotopes And Implications For The Formation Of Fun Cais, Tianhong Yu

All Dissertations

Calcium-aluminum-rich inclusions (CAIs) are millimeter-sized refractory objects found in primitive meteorites. CAIs are considered as some of the first solids to form in the solar system, because they are refractory. FUN CAIs, those with Fractionated and Unknown Nuclear effects, are a small subset of CAIs. These FUN CAIs show correlated excesses and deficits in the neutron-rich iron-group isotopes such as ⁴⁸ Ca and ⁵⁰ Ti which regular CAIs do not. Interestingly, these isotopes are most likely produced infrequently but in huge quantities in a rare class of thermonuclear (Type Ia) supernovae. I propose that the isotopic effects in the neutron-rich …

Adaptive Transmission Protocols For Wireless Communication Systems With Fountain Coding, Jason Ellis

All Dissertations

We present low-complexity adaptive protocols for both unicast and multicast transmission in wireless communication systems that employ higher layer fountain codes. Our adaptive protocols respond to variations in channel conditions by adapting the modulation and channel coding of transmitted packets, and they provide efficient communication over wireless channels that experience fading, shadowing, and other time-varying propagation losses. The operation of our protocols is governed by simple receiver statistics that can be obtained during the demodulation of received packets. We present three adaptive protocols for fountain-coded unicast transmission, and compare the throughput performance of our protocols with that of fixed-rate systems, …

Design And Synthesis Of Polymer - Magnetic Nanoparticle Composites For Use In Biomedical Applications, Roland Stone

All Dissertations

The future of diagnostics and therapeutic drugs in biomedicine is nanoparticles. These nanoparticles come in many different shapes, sizes, and combination of materials. Magnetic nanoparticles have been studied for many years for use in biomedicine, not only for their high surface area, but also because of its unique magnetic properties. They can magnetically interact with their environment, be guided to a specific location, and manipulated to release energy in the form of heat. To ensure that these magnetic nanoparticles survive in the circulatory system, they must be modified with materials to make them colloidally stable in water and shield them …

Approximation In Multiobjective Optimization With Applications, Lakmali Weerasena

All Dissertations

Over the last couple of decades, the field of multiobjective optimization has received much attention in solving real-life optimization problems in science, engineering, economics and other fields where optimal decisions need to be made in the presence of trade-offs between two or more conflicting objective functions. The conflicting nature of objective functions implies a solution set for a multiobjective optimization problem. Obtaining this set is difficult for many reasons, and a variety of approaches for approximating it either partially or entirely have been proposed.

In response to the growing interest in approximation, this research investigates developing a theory and methodology …

Primary Resonance Behavior Of Expanded Polymer Cushion Material Under Low-Intensity Harmonic Excitations, Gregory Batt

All Dissertations

The demand to lower costs and reduce the amount of packaging materials utilized in a packaged-product system has placed increased importance on the development of tools to model the behavior of packaging systems. In this dissertation, the free and forced vibration response of a nonlinear, distributed-parameter model of a viscoelastic rod with an applied tip-mass is used to investigate the response of expanded polymer cushion materials to low-intensity harmonic excitations. The rod and tip-mass represent an idealized packaged product system. A nonlinear model is developed from constitutive relations. A classical Maxwell-Weichert model, represented via a Prony series, is used to …

Seismic Site Coefficient Model And Improved Design Response Spectra Based On Conditions In South Carolina, Shimelies Aboye

All Dissertations

A new seismic site coefficient model is developed from the results of over 60,000 total stress, one-dimensional equivalent ground response simulations assuming conditions in South Carolina. Computed site coefficients ( F ) are plotted versus average shear wave velocity in the top 30 m (V_S30 ) and grouped by location, spectral acceleration (S_outcrop ) and spectral period. Locations considered in the Coastal Plain include Aiken, Charleston, Columbia, Florence, Lake Marion, Myrtle Beach, and the South Carolina side of Savannah. Locations considered in the Piedmont include Columbia, Greenville, Greenwood, and Rock Hill. In all the plots of …

Abstract Models Of Molecular Walkers, Oleg Semenov

Computer Science ETDs

Recent advances in single-molecule chemistry have led to designs for artificial multi-pedal walkers that follow tracks of chemicals. The walkers, called molecular spiders, consist of a rigid chemically inert body and several flexible enzymatic legs. The legs can reversibly bind to chemical substrates on a surface, and through their enzymatic action convert them to products. We study abstract models of molecular spiders to evaluate how efficiently they can perform two tasks: molecular transport of cargo over tracks and search for targets on finite surfaces. For the single-spider model our simulations show a transient behavior wherein certain spiders move superdiffusively over …

Model Selection For Stochastic Block Models, Xiaoran Yan

Computer Science ETDs

As a flexible representation for complex systems, networks (graphs) model entities and their interactions as nodes and edges. In many real-world networks, nodes divide naturally into functional communities, where nodes in the same group connect to the rest of the network in similar ways. Discovering such communities is an important part of modeling networks, as community structure offers clues to the processes which generated the graph. The stochastic block model is a popular network model based on community structures. It splits nodes into blocks, within which all nodes are stochastically equivalent in terms of how they connect to the rest …

Investigation Of The Life History And Lipid Content Consequences Of Reduced Abundance Of Delta-9 Desaturases In Drosophila Melanogaster, Li Ko

School of Biological Sciences: Dissertations, Theses, and Student Research

Monounsaturated fatty acids (MUFAs) are essential components in all organisms, and the key enzymes that catalyze the production of MUFA are delta-9 desaturases. These enzymes are ER bound and introduce the first double bonds in saturated fatty acids. To investigate the role that delta-9 desaturases play in Drosophila life history and development we performed a series of studies using the RNAi method. Longevity results showed die-off peaks of the knocked-down (KD) flies at day 45. Fecundity study showed decreases in both egg productions and viability of these eggs. Development difficulties were observed in both regular diet and low fat diet. …

Trade-Offs In Male Lek Behavior, Sarah A. Cowles

School of Biological Sciences: Dissertations, Theses, and Student Research

In lek mating systems, males aggregate together and perform courtship displays to visiting females. However, display may be energetically expensive and reduce the time available for foraging. These costs in turn could lower energy reserves, which could decrease survival. I examined trade-offs in male lek behavior using two methods: 1) I conducted an empirical study of how sharp-tailed grouse (Tympanuchus phasianellus) males allocate time between courtship display (“dancing”), agonism, foraging, and inactivity in relation to female numbers both within and across days. I also measured head turning rates during these same behaviors as a proxy for visual attentiveness …

The Roles Of Phenotypic Plasticity And Genotypic Specialization In High Altitude Adaptation, Danielle M. Tufts

School of Biological Sciences: Dissertations, Theses, and Student Research

In vertebrates living at high altitude, arterial hypoxemia may be ameliorated by reversible changes in the oxygen-carrying capacity of the blood (regulated by erythropoiesis) and/or changes in blood–oxygen affinity (regulated by allosteric effectors of hemoglobin function). These hematological traits often differ between taxa that are native to different elevational zones, but it is often unknown whether the observed physiological differences reflect fixed, genetically based differences or environmentally induced acclimatization responses (phenotypic plasticity). Here, we report measurements of hematological traits related to blood–O₂ transport in populations of deer mice (Peromyscus maniculatus) that are native to high- and low-altitude …

An Efficient Two Sample Capture-Recapture Model With High Recaptures, Danjuma Jibasen, Yusuf J. Adams

CBN Journal of Applied Statistics (JAS)

This paper proposed an efficient two sample capture-recapture model (Ma) with high recaptures and compared it with the existing models like the model of no factor effect (Mo), behavioral response model (Mb) and the Petersen model (Ms), using simulated data. We found that the Petersen model provides a better estimate of the population size when the observations follow a hypergeometric distribution and the population is overestimated when recapture is high. It was also found that the proposed model provides a better estimator of the population size than the existing ones when the recapture is high. This model is particularly useful …

Causal Relationship Between Stock Market Index And Exchange Rate: Evidence From Nigeria, Abdulrasheed Zubair

CBN Journal of Applied Statistics (JAS)

This paper uses Johansen’s cointegration to test for the possibility of cointegration and Granger-causality to estimate the causal relationship between stock market index and monetary indicators (exchange rate and M2) before and during the global financial crisis for Nigeria, using monthly data for the period 2001–2011. Results suggest absence of long-run relationship before and during the crisis. The Granger-causality tests show a uni-directional causality running from M2 to ASI before the crisis while during the period of the crisis there is absence of causality between the variables. This suggests that ASI show responsiveness to M2. Thus, absence of the direct …

Investigating Chaos In The Nigerian Asset And Resource Management (Arm) Discovery Fund, Ibiyinka A. Fuwape, Samuel T. Ogunjo

CBN Journal of Applied Statistics (JAS)

This paper investigates chaos in a Nigerian mutual fund, Asset and Resource Management Company Limited (ARM) for a period of eleven years. The existence of chaotic signals in the data was identified by the reconstruction of the phase space of the daily closing price of the fund and the delay time was quantified using mutual information function and the embedding dimension by the false nearest neighbours, where the values were identified to be 15 and 20 respectively. The presence of chaotic signals in the ARM data was further confirmed by the correlation dimension method which yielded a dimension of 2.2 …

Modeling The Nigerian Inflation Rates Using Periodogram And Fourier Series Analysis, Chukwuemeka O. Omekara,, Emmanuel J. Ekpenyong, Micheal P. Ekerete

CBN Journal of Applied Statistics (JAS)

This work considers the application of Periodogram and Fourier Series Analysis to model all-items monthly inflation rates in Nigeria from 2003 to 2011. The main objectives are to identify inflation cycles, fit a suitable model to the data and make forecasts of future values. To achieve these objectives, monthly all-items inflation rates for the period were obtained from the Central Bank of Nigeria (CBN) website. Periodogram and Fourier series methods of analysis are used to analyze the data. Based on the analysis, it was found that inflation cycle within the period was fifty one (51) months, which coincides with the …

Nigerian Stock Index: A Search For Optimal Garch Model Using High Frequency Data, Olaoluwa Simon Yaya

CBN Journal of Applied Statistics (JAS)

This paper attempts to fit the best Generalized Autoregressive Conditional Heteroscedastic (GARCH) model for All Share Index (ASI) of Nigerian Stock Exchange (NSE) returns. A search is made on various GARCH variants specified on the assumptions of stationarity and asymmetry. Fractionally integrated types are also considered to capture the possibility of return series having property of long range dependency. The parameter estimations are carried out on the assumptions of normality and non-normality of GARCH innovations, with models and forecasts evaluated using information criteria and loss functions respectively. Under normality assumption, Hyperbolic GARCH (HYGARCH(1,d,1)) model is selected and Integrated GARCH (IGARCH(1,1)) …

Time Series Modeling Of Nigeria External Reserves, Iheanyichukwu S. Iwueze, Eleazar C. Nwogu, Valentine U. Nlebedim

CBN Journal of Applied Statistics (JAS)

This paper discusses the levels and trend of external reserves in Nigeria. The relevance of this lies in the fact that it could help to monitor the reserves and throw early warning signal about any economic crisis. Monthly data on Nigeria external reserves for the period January 1999 to December, 2008 derived from the 2008 CBN Statistical Bulletin was analyzed using ARIMA model. Results of the analyses show that (i) the data requires logarithmic transformation to stabilize the variance and make the distribution normal (ii) the appropriate model that best describes the pattern in the transformed data is the Autoregressive- …

A Markov Decision Process Approach To Optimal Control Of A Multi-Level Hierarchical Manpower System, Akaninyene U. Udom

CBN Journal of Applied Statistics (JAS)

A recurrent problem in manpower control is how to attain the desired structural configuration in an optimal way, since it is possible to reach a desired structural configuration using different control inputs. The major aim of this paper is to develop a Markov Decision Process for optimal control of a Multi-level Hierarchical Manpower System (MHMS) by promotion and interdepartmental transfers. This is examined under control by intervention and contraction cost Markov Decision Process.

Recent Developments In Slovak Competition Law - Legislation And Case Law Review, Zuzana Šabová, Katarína Fodorová, Daniela Lukáčová

Yearbook of Antitrust and Regulatory Studies

No abstract provided.

The Resilience Of Property, Lynda L. Butler

Faculty Publications

Resilience is essential to the ability of property to face transforming social and environmental change. For centuries, property has responded to such change through a dialectical process that identifies emerging disciplinary perspectives and debates conflicting values and norms. This dialectic promotes the resilience of property, allowing it to adapt to changing conditions and needs. Today the mainstream economic theory dominating common law property is progressively being intertwined with constitutionally protected property, undermining its long-term resilience. The coupling of the economic vision of ordinary property with constitutional property embeds the assumptions, choices, and values of the economic theory into both realms …

Members Only: Undocumented Students & In-State Tuition, Angela M. Banks

Faculty Publications

No abstract provided.

Hierarchically Variable Deference To Agency Interpretations, Aaron-Andrew P. Bruhl

Faculty Publications

When courts review agency action, they typically accord agency decisions a degree of deference. As many courts and commentators have recognized, the law in this area is complicated because it features numerous standards of review, including several distinct regimes for evaluating agencies’ legal interpretations. There is, however, at least one important respect in which uniformity rather than variety prevails: the applicable standards of review do not vary depending on which court is reviewing the agency. Whichever standard governs a particular case—Chevron, Skidmore, or something else—all courts in the judicial hierarchy are supposed to apply that same standard.

This Article proposes …

Evaluating Flexibility In International Patent Law, Sarah R. Wasserman Rajec

Faculty Publications

Global patent law has raced toward harmonization over the past decades. Countries with vastly different industries, values, and levels of development now offer robust patent rights with similar contours through membership in the World Trade Organization and consequent adoption of the Agreement on Trade-Related Aspects of Intellectual Property Rights (“TRIPS”). However, patent law is still far from harmonized among countries or static within countries. Jurisdictions tailor their patent laws to accommodate differences between industries, unforeseen inefficiencies, and diverse views of the costs and benefits associated with offering patent rights to stimulate innovation. Prior scholarly work consists of either doctrinal analyses …

Matched; Crossed; Reached. The Matched Trilogy, William Morris, Ally Condie

BYU Studies

Ally Condie, a Latter-day Saint and graduate of Brigham Young University, is best known as the author of the Matched trilogy. These three books contain all the ingredients for a successful YA (young adult fiction) series: a plucky heroine, a love triangle, a dystopian setting. And a success it is: each volume has spent numerous weeks on various best-seller lists, Disney has optioned the film rights to the trilogy, and numerous fan sites and social media groups are active online. If it were just those ingredients alone, the trilogy would not be worth noting amid the outpouring of YA novels …

Benemérito De Las Américas: The Beginning Of A Unique Church School In Mexico, Barbara E. Morgan

BYU Studies

In 1957, President David O. McKay instructed Church leaders to investigate creating Church-sponsored schools in Mexico. The vision of Church leaders reached beyond educating the students and focused on training faithful Latter-day Saints that would teach and influence children and youth throughout Latin America. Marion Romney and others assessed the educational needs of Church members in Mexico; membership in the Church reached twenty-five thousand by 1961. They worked to find and purchase land, develop building plans, and select directors for these Church schools. They created a society that had the legal authority to purchase land and run schools in Mexico, …

Full Issue, Byu Studies

BYU Studies

No abstract provided.

The Viper On The Hearth, Updated Edition, Mickell J. Summerhays, Terryl L. Givens

BYU Studies

Terryl L. Givens, the well-known Mormon author, is a professor of literature and religion and is the James A. Bostwick Professor of English at the University of Richmond, Virginia. He has authored books such as By the Hand of Mormon: The American Scripture that Launched a New World Religion and The God Who Weeps: How Mormonism Makes Sense of Life.

Many may be familiar with Givens's classic study on Mormon literature entitled The Viper on the Hearth. It is known as one of the most in-depth studies of anti-Mormon literary texts. Givens himself calls this a look at "the long …

Dark Mirrors: Azazel And Satanael In Early Jewish Demonology, Andrei A. Orlov, David J. Larsen

BYU Studies

Andrei A. Orlov, professor of Judaism and Christianity in Antiquity at Marquette University, is a highly prolific author and world-renowned scholar who specializes in Christian origins, Jewish apocalypticism and mysticism, and Old Testament pseudepigrapha, including texts such as 2 Enoch and the Apocalypse of Abraham. Among Orlov's many writings are the books The Enoch-Metatron Tradition (TSAJ, 107; Tuebingen: Mohr Siebeck, 2005), From Apocalypticism to Merkabah Mysticism (SJSJ, 114; Leiden: Brill, 2007), Divine Manifestations in the Slavonic Pseudepigrapha (OJC, 2; Piscataway: Gorgias, 2009), and Concealed Writings: Jewish Mysticism in the Slavonic Pseudepigrapha (Flaviana; Moscow: Gesharim, 2011).

The present book under review, …

Shifting Borders And A Tattered Passport: Intellectual Journeys Of A Mormon Academic, Roger Terry, Armand L. Mauss

BYU Studies

"When the intellectual history of late-twentieth-century Mormonism is written," begins Richard Bushman in the foreword to this memoir, "Armand Mauss will occupy a preeminent position." For this reason alone, Mauss's reminiscences should be of interest to any serious student of Mormonism.

Mauss takes his title from the following quote by Neal A. Maxwell: "The LDS scholar has his citizenship in the Kingdom, but carries his passport into the professional world--not the other way around." But Mauss's observation that the borders have shifted over time and his passport is tattered reminds us that travel between the Church and the world is …

Premarital Sex In America: How Young Americans Meet, Mate, And Think About Marrying; Sex And The Soul: Juggling Sexuality, Spirituality, Romance, And Religion On America's College Campuses, Mark Regnerus, Jeremy Uecker, Donna Freitas, Brian J. Willoughby

BYU Studies

MARK REGNERUS, JEREMY UECKER. Premarital Sex in America: How Young Americans Meet, Mate, and Think about Marrying. New York City: Oxford University Press, 2011.

DONNA FREITAS. Sex and the Soul: Juggling Sexuality, Spirituality, Romance, and Religion on America's College Campuses. New York City: Oxford University Press, 2010.

Mark Regnerus (University of Texas) and Jeremy Uecker (Baylor University), both professors of sociology, have previously collaborated on a host of academic papers focused on the dating, marital, and sexual lives of young adults. Regnerus has previously published a book entitled Forbidden Fruit (Oxford University Press, 2007), which explores the sexual lives of …