Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2011

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 6121 - 6150 of 108241

Full-Text Articles in Entire DC Network

Measuring Digital System Latency From Sensing To Actuation At Continuous 1 Millisecond Resolution, Weixin Wu Dec 2011

Measuring Digital System Latency From Sensing To Actuation At Continuous 1 Millisecond Resolution, Weixin Wu

All Theses

This thesis describes a new method for measuring the end-to-end latency between sensing and actuation in a digital computing system. Compared to previous work, which generally measures the latency at 16-33 ms intervals or at discrete events separated by hundreds of ms, our new method measures the latency continuously at 1 millisecond resolution. This allows for the observation of variations in latency over sub 1 s periods, instead of relying upon averages of measurements. We have applied our method to two systems, the ?rst using a camera for sensing and an LCD monitor for actuation, and the second using an …

Go to article

Short Remarks On The Political And Social Writings Of Reverend Anthony Walke Of Princess Anne County, Virginia & A Concise & Impartial Account Of The Causes Of Their Origins & Progress, Roberta Vogt Dec 2011

Short Remarks On The Political And Social Writings Of Reverend Anthony Walke Of Princess Anne County, Virginia & A Concise & Impartial Account Of The Causes Of Their Origins & Progress, Roberta Vogt

All Theses

The following thesis examines multiple social and political topics in the largely unstudied writings of Reverend Anthony Walke (c. 1755-1814) of Princess Anne County, Virginia. His papers reside at the Filson Historical Society in Louisville, Kentucky, as well as appearing in Virginia newspapers of the period. Walke's works comprise more than four hundred pages of primary source documents that relate to late eighteenth-century Virginia, and span the period of 1786 through 1805.
My research emphasizes his Revolutionary War pamphlet, Remarkable Occurrences during the unhappy American War, & a concise & impartial Account of the Causes of its Origin & Progress: …

Go to article

New Analytical Bounds On The Probability Of Code-Word Error For Convolution Codes With Viterbi Decoding, Shweta Tomar Dec 2011

New Analytical Bounds On The Probability Of Code-Word Error For Convolution Codes With Viterbi Decoding, Shweta Tomar

All Theses

New analytical bounds are developed for the probability of code-word error in a communication system with convolutional coding and soft-decision Viterbi decoding. The bounds are applicable to communications in channels with asynchronous interferers which are modeled as independent, partial-time white Gaussian interference sources. This model is often used in simulations to reflect the circumstances encountered in many packet radio communication networks. The new results include both purely analytical bounds and offline-simulation-aided bounds that permit implementation of accurate communication-link models with much lower online computational and storage requirements than are required with traditional Monte Carlo simulations of link performance. They significantly …

Go to article

Prevention Of Iron- And Copper-Mediated Oxidative Dna Damage By Neurotransmmitters And Related Compounds: Evidence For Metal Binding As An Antioxidant Mechanism, Carla Garcia Dec 2011

Prevention Of Iron- And Copper-Mediated Oxidative Dna Damage By Neurotransmmitters And Related Compounds: Evidence For Metal Binding As An Antioxidant Mechanism, Carla Garcia

All Theses

An array of health concerns have been attributed to oxidative DNA damage from the hydroxyl radical (*OH), and the presence of the most biologically available metals iron and copper perpetuate the production of this radical through the Fenton and Fenton-like reactions, respectively. The concentrations at which flavonol and polyphenol antioxidants prevent 50% of DNA damage (IC50) were measured using gel electrophoresis assays upon Fe(II)/H2O2- and Cu(I)/H2O2-mediated DNA damage (Chapter 2). Results show that catechol- and gallol-containing antioxidants differ greatly in preventing DNA damage by Cu(I)/H2O2, compared to Fe(II)/H2O2, behavior that was explained using electron paramagnetic resonance spectroscopy. Semiquinone and other …

Go to article

Evaluating The Usability Of System-Generated And User-Generated Passwords Of Approximately Minimum Equal Security, Sourav Bhuyan Dec 2011

Evaluating The Usability Of System-Generated And User-Generated Passwords Of Approximately Minimum Equal Security, Sourav Bhuyan

All Theses

System-generated or user-generated text-based passwords are commonly used by the users to authenticate access to their electronic assets. These passwords may vary in usability and memorability depending on the type of password generation, composition and length. However, little past research has compared usability and memorability of passwords, satisfying minimum entropy for a secure password. This study compared three password policy conditions, assigning/generating passwords of approximately equal minimum security, i.e. 6-character alphanumeric system-generated passwords, minimum 8-character restricted user-generated passwords and minimum 16-character unrestricted user-generated passwords.
The study involved 54 participants, equally divided into three groups, 18 in each password policy condition. …

Go to article

Erasure Of The Individual Sovereign: The Vulnerability Of Public And Gendered Identity In Marlowe, Webster, And Cary, Justina Oliva Dec 2011

Erasure Of The Individual Sovereign: The Vulnerability Of Public And Gendered Identity In Marlowe, Webster, And Cary, Justina Oliva

All Theses

My thesis explores the isolation and fragmentation that attend ruling ideologies in early modern England. I study three plays, Christopher Marlowe's Edward II, John Webster's Duchess of Malfi, and Elizabeth Cary's Tragedy of Mariam, in order to examine the illusion of absolute power they represent. Utilizing Ernst Kantorowicz's concept of the 'king's two bodies,' I explore ways in which the sovereign ideal dehumanizes monarch and subjects, depriving them both of autonomy and personal connection. Those who attempt to break free from its constraints find themselves rewritten as dangerous to the realm. Because it depends on naturalized hierarchies of difference, the …

Go to article

Effect Of Selected Phase Change Materials Concentration And Manufacturing Process On The Properties Of Plaster Mixture Systems, Rong Cui Dec 2011

Effect Of Selected Phase Change Materials Concentration And Manufacturing Process On The Properties Of Plaster Mixture Systems, Rong Cui

All Theses

Phase change materials (PCM) are generally used in building construction materials for their ability to absorb and release large amounts of energy when their phase change happens at their specific melting temperature. This results in a significant increase in thermal mass of the building, a reduction in temperature fluctuations and therefore a reduction in heating and cooling loads. However, in order to properly select a PCM and optimize its integration in a specific building, the properties of building construction materials enhanced with PCM must be known. This research focuses on studying the effects of the concentration of a micro-encapsulated PCM …

Go to article

Barriers To Appropriate Technology Growth In Sustainable Development, Ivana Zelenika, Joshua M. Pearce Dec 2011

Barriers To Appropriate Technology Growth In Sustainable Development, Ivana Zelenika, Joshua M. Pearce

Department of Materials Science and Engineering Publications

Given the urgency of development problems world-wide, as well as the opportunities of open source appropriate technology (OSAT) to help expedite sustainable development goals, a better understanding of the barriers limiting the scaling of OSAT is needed. In this study, key organizations and researchers working in the field of appropriate technology (AT) were interviewed to identify barriers to OSAT. The data was analyzed via pattern coding and content analysis. Results reveal that among the most pressing problems for those working in the field of AT were the need for better communication and collaboration between the agencies and communities to share …

Go to article

“That’S What Friends Do”: Informal Caregiving For Chronically Ill Midlife And Older Lesbian, Gay, And Bisexual Adults, Anna M. Muraco, Karen Fredriksen-Goldsen Dec 2011

“That’S What Friends Do”: Informal Caregiving For Chronically Ill Midlife And Older Lesbian, Gay, And Bisexual Adults, Anna M. Muraco, Karen Fredriksen-Goldsen

Sociology Faculty Works

This study examines the relationships between friends; a caregiver who provides care to a care recipient, who is a lesbian, gay, or bisexual (LGB) adult over age 50 in need of assistance due to chronic physical or mental health conditions. Using a sample of 18 care pairs (n = 36), this work examines qualitative interview data. Findings from the study include: (a) both the care recipient and the caregiver receive benefits from the friendship; (b) caregiving alters and challenges the friendship; and (c) friends assume differential levels of commitment and responsibility in providing care. Studying this population of LGB …

Go to article

Diffusion Tensor Imaging Data Reveals Grm3 Polymorphism's Association With White Matter Integrity In Schizophrenia, Joanna Mounce Dec 2011

Diffusion Tensor Imaging Data Reveals Grm3 Polymorphism's Association With White Matter Integrity In Schizophrenia, Joanna Mounce

Biomedical Sciences ETDs

While the functional disconnectivity hypothesis of schizophrenia has been the subject of much study, very little is known about the contribution of individual genotypes to connectivity between brain regions in either schizophrenia patients or in healthy controls. In this study, we obtained diffusion tensor imaging (DTI) maps and genome-wide SNP data from 74 cases and 87 age- and gender-matched controls. Correlations were performed between loading coefficients obtained from fractional anisotropy (FA) values in networks of regions representing 6 maximally independent components and 134 SNPs in genes that have been found to be important in myelination and/or schizophrenia. By using independent …

Go to article

Assessment Of Functional Characteristics Of Small Gtpases Using Small Molecules, Jacob Ongudi Agola Dec 2011

Assessment Of Functional Characteristics Of Small Gtpases Using Small Molecules, Jacob Ongudi Agola

Biomedical Sciences ETDs

Rab and Rho subfamilies of GTPases are functionally linked to intracellular trafficking and organization of the cytoskeleton respectively. Despite their roles, use of small molecule inhibitors or activators to map the functionality of these GTPases remains largely underexplored due to lack of suitable compounds. In this dissertation, we report on the functional characterization of Rab7 and Rac1 GTPases using small molecules. 2-(benzoylcarbamothioylamino)-5,5-dimethyl-4,7- dihydrothieno[2,3-c]pyran-3-carboxylic acid (PubChem #: CID1067700) has been used to characterize Rab7. Using bead based flow cytometry, CID1067700 was found to have significant inhibitory potency on Rab7 nucleotide binding with a respective inhibitory efficacy of 80% for BODIPY-GTP and …

Go to article

Efficiently Bootstrapping Extreme Scale Software Systems, Joshua Goehner Dec 2011

Efficiently Bootstrapping Extreme Scale Software Systems, Joshua Goehner

Computer Science ETDs

Many scientific fields and commercial industries need to solve computationally large problems. These problems can often be broken into smaller tasks, which can be executed in parallel, on large computer systems. In pursuit of solving ever larger problems in a more timely manner, the number of nodes in these large computer systems have grown to extremely large scales. All of the extreme-scale-software systems that run on these extreme-scale-computational systems go through what we call a bootstrapping phase. During this phase, the software system is deployed onto a set of computers and its initialization information is disseminated. In this thesis, we …

Go to article

Life History Tradeoffs And Phenotypic Plasticity: The Tale Of A Flight Polyphenic Field Cricket, Chandreyee Mitra Dec 2011

Life History Tradeoffs And Phenotypic Plasticity: The Tale Of A Flight Polyphenic Field Cricket, Chandreyee Mitra

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

Most organisms are resource limited. Such limitations can result in tradeoffs between life history traits -- any traits that affect survival or reproduction. Flight polyphenic field crickets are thought to be a classic example of such a life history tradeoff, in which individuals tradeoff investment in flight capability and investment in reproduction. This polyphenism results from the interaction of two morphological traits: wing morphology (short or long) and flight muscle morphology (functional pink or non-functional white), and is affected by both genes and the environment. I examined life history traits of a flight polyphenic field cricket, Gryllus lineaticeps. First, …

Go to article

Msh1 Influence On Plant Mitochondrial Genome Recombination And Phenotype In Tobacco, Peibei Sun Dec 2011

Msh1 Influence On Plant Mitochondrial Genome Recombination And Phenotype In Tobacco, Peibei Sun

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

Plant mitochondrial genomes are composed of unusually complex structures, due to active recombination at numerous repeated sequences in the genome. The maintenance of mitochondrial genome stability is under the control of identifiable nuclear genes. In plants, three nuclear genes (MSH1, RECA3 and OSB1) have been shown to participate in recombination surveillance and the suppression of illegitimate recombination in mitochondria. Disruption of these loci in Arabidopsis results in reproducible mitochondrial genome rearrangements. We demonstrated that repeat-mediated de novo recombination was also enhanced in both Arabidopsis and tobacco during passage through in vitro culture. Furthermore, in vitro conditions led …

Go to article

Investment Treaty Disputes: Ideological Fault Lines And An Evolving Zeitgeist, Locknie Hsu Dec 2011

Investment Treaty Disputes: Ideological Fault Lines And An Evolving Zeitgeist, Locknie Hsu

Research Collection Yong Pung How School Of Law

The zeitgeist of the 21st century in the field of investment treaty arbitrations comprises a rise in the number of such arbitrations and accompanying observations on the unwieldy jurisprudential effects of such a rise. The international investment arbitration community is alive with discussion over these effects, which discussion includes an examination of the value of prior awards as precedents.' The existing regime based on treaty interpretation clearly provides no formal system of precedent and the 'players' (read: arbitrators) change from dispute to dispute as investment arbitration tribunals do not fall within a single, neat judicial hierarchical system. With the number …

Go to article

Nebraska's Traditional Cultural Properties In The Section 106 Process, Karen A. Steinauer Dec 2011

Nebraska's Traditional Cultural Properties In The Section 106 Process, Karen A. Steinauer

Department of Anthropology: Theses and Student Research

Archeologists engaged in cultural resource management and compliance are charged with measuring “historic” properties against legal standards for purposes of federal protection. This thesis focuses on one kind of property, the Traditional Cultural Property (TCP), within the National Historic Preservation Act (NHPA) Section 106 process, where sometimes in practice the terms TCP and sacred site are used interchangeably. This thesis strives to bring precision to TCPs, provide a concise reference, and, through inspection and analysis of four case studies of Nebraska properties, critique the present process for identifying and evaluating TCPs.

Go to article

Effect Of Diet Quantity And Quality On Female Sampling Behavior And Mating Preferences In A Field Cricket, Heidi L. Bulfer Dec 2011

Effect Of Diet Quantity And Quality On Female Sampling Behavior And Mating Preferences In A Field Cricket, Heidi L. Bulfer

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

Understanding the adaptive significance of variation in female mating behaviour is important because variation may often be favored by selection instead of a change in mean mating behaviour, particularly in variable environments. Females are known to adjust their mating behaviour to a variety of intrinsic and extrinsic factors including nutrition. There are multiple reasons why female behaviours might vary with nutrition; we tested two of these hypotheses: the search cost hypothesis and the direct benefits hypothesis. These hypotheses are not mutually exclusive, but they make contrasting predictions under some conditions. Low nutrition females may have less available energy to support …

Go to article

Analysis Of Turnip Crinkle Virus Effects On The Innate And Adaptive Immunity In Arabidopsis Thaliana, Teresa J. Donze Dec 2011

Analysis Of Turnip Crinkle Virus Effects On The Innate And Adaptive Immunity In Arabidopsis Thaliana, Teresa J. Donze

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

The ability to understand the interactions between plants and the variety of pathogens they encounter on a daily basis is an important area of research. In the following work presented in this dissertation, I sought to better understand the mechanisms that Turnip crinkle virus (TCV) employs to elude the defense responses of the host plant Arabidopsis thaliana. It was previously determined that TCV coat protein (CP) interacts with a transcription factor, TIP, within the about 10 amino acid region near the N-terminus of the CP called the R-domain. When this interaction was disrupted by making single amino acid substitutions …

Go to article

Contributions Of Financial Sector Reforms And Credit Supply To Nigerian Agricultural Sector (1978-2009), Anthony O. Onoja, M. E. Onu, S. Ajodo-Ohiemi Dec 2011

Contributions Of Financial Sector Reforms And Credit Supply To Nigerian Agricultural Sector (1978-2009), Anthony O. Onoja, M. E. Onu, S. Ajodo-Ohiemi

CBN Journal of Applied Statistics (JAS)

This study analyzed the trends and pattern of institutional credit supply to agriculture during pre- and post-financial reforms along with their determinants. It then compared the effects of reform policies on access to institutional credits in Nigerian agricultural sector before and after the reforms (1978 - 1985; and 1986 -2009). Relying mainly on time series data from CBN and NBS, it used ordinary least squares method (linear, semi-log and double log) to model the determinants of banking sector lending to the agricultural sector during the review period. The models were subjected to several econometric tests before accepting one. Chow test …

Go to article

Determinants Of Foreign Reserves In Nigeria: An Autoregressive Distributed Lag Approach, David Irefin, Baba N. Yaaba Dec 2011

Determinants Of Foreign Reserves In Nigeria: An Autoregressive Distributed Lag Approach, David Irefin, Baba N. Yaaba

CBN Journal of Applied Statistics (JAS)

On global scale, central banks’ holdings of foreign reserves have escalated sharply in recent years. World international reserves holdings have risen significantly from US$1.2 trillion in 1995 to nearly US$10.0 trillion in June 2011. Dominant among these reserves are concentrated in the hands of few countries. Ten major holders of foreign reserves are mostly from Asia. Oil exporting countries in Africa and the Middle East are not left out in this trend. Nigeria’s foreign reserves rose from US$5.5 billion in 1999 to US$62.40 billion in July 2008, making Nigeria the twenty-fourth largest reserves holder in the world. This pace of …

Go to article

Effects Of Exchange Rate Movements On Economic Growth In Nigeria, Eme O. Akpan, Johnson A. Atan Dec 2011

Effects Of Exchange Rate Movements On Economic Growth In Nigeria, Eme O. Akpan, Johnson A. Atan

CBN Journal of Applied Statistics (JAS)

This study investigates the effect of exchange rate movements on real output growth in Nigeria. Based on quarterly series for the period 1986 to 2010, the paper examines the possible direct and indirect relationship between exchange rates and GDP growth. The relationship is derived in two ways using a simultaneous equations model within a fully specified (but small) macroeconomic model. A Generalised Method of Moments (GMM) technique was explored. The estimation results suggest that there is no evidence of a strong direct relationship between changes in exchange rate and output growth. Rather, Nigeria’s economic growth has been directly affected by …

Go to article

Exchange Rate Volatility In Nigeria: Consistency, Persistency & Severity Analyses, Babatunde Adeoye, Akinwande A. Atanda Dec 2011

Exchange Rate Volatility In Nigeria: Consistency, Persistency & Severity Analyses, Babatunde Adeoye, Akinwande A. Atanda

CBN Journal of Applied Statistics (JAS)

The adoption of the International Monetary Fund (IMF) Structural Adjustment Programme (SAP) in 1986 resulted in the transition from fixed exchange rate regime to floating exchange rate regime in Nigeria. Ever since, the exchange rate of naira vis-à-vis the U.S dollar has attained varying rates all through different time horizons. On this basis, this study examines the consistency, persistency, and severity (degree) of volatility in exchange rate of Nigerian currency (naira) vis-a-vis the United State dollar using monthly time series data from 1986 to 2008. The standard Purchasing Power Parity (PPP) model was used to analyze the long-run consistency of …

Go to article

Foreign Private Investment And Economic Growth In Nigeria: A Cointegrated Var And Granger Causality Analysis, F. Z. Abdullahi, S. Ladan, Haruna R. Bakari Dec 2011

Foreign Private Investment And Economic Growth In Nigeria: A Cointegrated Var And Granger Causality Analysis, F. Z. Abdullahi, S. Ladan, Haruna R. Bakari

CBN Journal of Applied Statistics (JAS)

This research uses a cointegration VAR model to study the contemporaneous long-run dynamics of the impact of Foreign Private Investment (FPI), Interest Rate (INR) and Inflation rate (IFR) on Growth Domestic Products (GDP) in Nigeria for the period January 1970 to December 2009. The Unit Root Test suggests that all the variables are integrated of order 1. The VAR model was appropriately identified using AIC information criteria and the VECM model has exactly one cointegration relation. The study further investigates the causal relationship using the Granger causality analysis of VECM which indicates a uni-directional causality relationship between GDP and FDI …

Go to article

Banking Sector Credit And Economic Growth In Nigeria: An Empirical Investigation, Aniekan O. Akpansung, Sikiru J. Babalola Dec 2011

Banking Sector Credit And Economic Growth In Nigeria: An Empirical Investigation, Aniekan O. Akpansung, Sikiru J. Babalola

CBN Journal of Applied Statistics (JAS)

The paper examines the relationship between banking sector credit and economic growth in Nigeria over the period 1970-2008. The causal links between the pairs of variables of interest were established using Granger causality test while a Two-Stage Least Squares (TSLS) estimation technique was used for the regression models. The results of Granger causality test show evidence of unidirectional causal relationship from GDP to private sector credit (PSC) and from industrial production index (IND) to GDP. Estimated regression models indicate that private sector credit impacts positively on economic growth over the period of coverage in this study. However, lending (interest) rate …

Go to article

Neither The Washington Nor Beijing Consensus: Developmental Models To Fit African Realities And Cultures, Sanusi L. Sanusi Dec 2011

Neither The Washington Nor Beijing Consensus: Developmental Models To Fit African Realities And Cultures, Sanusi L. Sanusi

CBN Journal of Applied Statistics (JAS)

No abstract provided.

Go to article

Banking Reform And Its Impact On The Nigerian Economy, Sanusi L. Sanusi Dec 2011

Banking Reform And Its Impact On The Nigerian Economy, Sanusi L. Sanusi

CBN Journal of Applied Statistics (JAS)

No abstract provided.

Go to article

Globalization And Commitment In Corporate Social Responsibility: Cross-National Analyses Of Institutional And Political-Economy Effect, Alwyn Lim, Kiyoteru Tsutsui Dec 2011

Globalization And Commitment In Corporate Social Responsibility: Cross-National Analyses Of Institutional And Political-Economy Effect, Alwyn Lim, Kiyoteru Tsutsui

Research Collection School of Social Sciences

This article examines why global corporate social responsibility (CSR) frameworks havegained popularity in the past decade, despite their uncertain costs and benefits, and how theyaffect adherents’ behavior. We focus on the two largest global frameworks—the United NationsGlobal Compact and the Global Reporting Initiative—to examine patterns of CSR adoption bygovernments and corporations. Drawing on institutional and political-economy theories, wedevelop a new analytic framework that focuses on four key environmental factors—globalinstitutional pressure, local receptivity, foreign economic penetration, and national economicsystem. We propose two arguments about the relationship between stated commitment andsubsequent action: decoupling due to lack of capacity and organized hypocrisy due …

Go to article

Revisiting The Similar Fact Rule In Singapore: Public Prosecutor V. Mas Swan Bin Adnan And Another, Siyuan Chen Dec 2011

Revisiting The Similar Fact Rule In Singapore: Public Prosecutor V. Mas Swan Bin Adnan And Another, Siyuan Chen

Research Collection Yong Pung How School Of Law

The similar fact rule in Singapore—as with the law on any evidence law doctrine that can be found in both our Evidence Act and the common law—has required clarification for some time. This note, which discusses the latest local decision on the similar fact rule, considers if that decision is compatible with the Evidence Act and the various conceptualisations underlying the doctrine.

Go to article

The Judicial Duty To Give Reasons: Thong Ah Fat V Public Prosecutor [2011] Sgca 65, Siyuan Chen Dec 2011

The Judicial Duty To Give Reasons: Thong Ah Fat V Public Prosecutor [2011] Sgca 65, Siyuan Chen

Research Collection Yong Pung How School Of Law

The accused was charged under the Misuse of Drugs Act after being found with 142.41 grams of diamorphine at the Woodlands Checkpoint. The High Court Judge found the accused guilty and sentenced him to death in a brief judgment of five paragraphs. The Court of Appeal, however, ordered a retrial as it was of the view that the Judge’s reasoning was “unclear” and the “judicial duty to give reasoned decisions” was not discharged

Go to article

Splitting Hairs: What Subtle Distinctions Teach Us About Authority, Benjamin J. Keele Dec 2011

Splitting Hairs: What Subtle Distinctions Teach Us About Authority, Benjamin J. Keele

Library Staff Publications

Legal researchers constantly deal with issues of authority. Did the police have authority to search the car? Is this court of appeals decision binding authority on my case? What statutes are authoritative in my jurisdiction? These questions are important, and librarians often help find answers. The question of authority that librarians are best equipped to answer, however, is “How authoritative is this source?”

Go to article

First Prev Next Last