Digital Commons Network^™

Quantifying Effects Of Sleep Deprivation On Cognitive Performance, Quang Nghia Le

Masters Theses

“The most commonly used metric for evaluating alertness and vigilance is the Psychomotor Vigilance Test (PVT), previous studies have indicated that alertness and vigilance can be affected by the lack of sleep as a function of sleep loss. This study explores methods to predict median psychomotor vigilance reaction times. The data used in this study comes from a series of tests and surveys conducted on volunteer students. The data set contains many potential predictors of PVT and one aspect of the study was to identify variables that are useful in prediction. The performances of various prediction methods that allow for …

Crowdsourcing Contests: Understanding The Effect Of Environment And Organization Specific Factors On Sustained Participation, Hanieh Javadi Khasraghi, Xuan Wang

Information Systems Faculty Publications

Crowdsourcing has increasingly become a recognized problem-solving mechanism for organizations by outsourcing the problem to an undefined crowd of people. The success of crowdsourcing depends on the sustained participation and quality-submissions of the individuals. Yet, little is known about the environment-specific and organization-specific factors that influence individuals’ continued participation in these contests. We address this research gap, by conducting an empirical study using data from an online crowdsourcing contest platform, Kaggle, which delivers data science and machine learning solutions to its clients. The findings show the statistically significant effects of structural capital, familiarity with organization, and experience with the organization …

Understanding The Relationship Between Smartphone Addiction And Well-Being: The Mediation Of Mindfulness And Moderation Of Hedonic Apps, Murad Moqbel

Information Systems Faculty Publications

The advent of handheld devices such as smartphones has changed the way we connect, navigate, and entertain and has been recognized as a revolution in information and communication technologies (ICT). Despite the plethora of benefits of this new technology, concerns have been raised about the unintended adverse consequences to well-being in the form of addictive use. Past research has linked smartphone addiction to negative consequences, but it remains unclear how, why, and when (i.e., under what conditions) smartphone addiction, in turn, is related to well-being. This study attempts to fill this void by addressing these questions through the lens of …

Retention, Viral Suppression, And Care Models In Hiv Positive Children And Adolescents In Cameroon, Eveline Mboh Khan

Walden Dissertations and Doctoral Studies

Human Immunodeficiency Virus (HIV) remains a significant public health problem in Sub-Saharan Africa with poor treatment outcomes in children and adolescents (C&As). There is a lack of information on the effects of various HIV care models (Child and Adolescent Friendly Clinic model and Support Group model) on retention in care and Viral Suppression (VS) in Cameroon. This study was carried out to identify the care model with the best outcomes for C&As, inform national scale-up strategies, resource prioritization, and contribute to the existing literature. A quantitative retrospective cohort review approach guided by the social cognitive theory was used to analyze …

Causes And Consequences Of Liana Infestation In Southern Amazonia, Simone Matias Reis, Beatriz Schwantes Marimon, Paulo S. Morandi, Fernando Elias, A Esquivel‐Muelbert, Beatriz Schwantes Marimon, Sophie Fauset, Ea Oliveira, Gmf Heijden, David Galbraith, Ted R. Feldpausch, Oliver L. Phillips

School of Geography, Earth and Environmental Sciences

No abstract provided.

Changes In Fish Communities Due To Benthic Habitat Shifts Under Ocean Acidification Conditions, Carlo Cattano, Sylvain Agostini, Ben P. Harvey, Shigeki Wada, Federico Quattrocchi, Gabriele Turco, Kazuo Inaba, Jason M. Hall-Spencer, Marco Milazzo

School of Biological and Marine Sciences

No abstract provided.

The Cultural Construct Of Stress In Luganda-Speaking Women In Uganda, Courtney Skiera

Walden Dissertations and Doctoral Studies

Luganda, the primary language spoken in Uganda has no word for stress, but this does not necessarily preclude the Luganda-speaking population from experiencing stress. There is currently no research that reveals the stress phenomenon from a Ugandan’s perspective. The purpose of this study was to examine how Luganda-speaking Ugandans conceptualize stress. Two theoretical foundations formed the basis of this study: the cognitive appraisal of stress theory and the coordinated management of meaning. Using a qualitative interpretive design, this study examined the conceptualization of stress by Luganda-speaking women in terms of understanding, experiencing, and communicating the stress phenomenon. Participants were 7 …

Intercultural Communication Between African American Managers And Hispanic Workers With Esl, Reva Ann Stanton

Walden Dissertations and Doctoral Studies

By 2050, individuals of Hispanic descent will represent nearly 30% of the total American population with English as a second language (ESL). The problem addressed the lack of strategies being used by African American Managers on communicating with Hispanic workers with ESL. The purpose of the study was to explore what communication strategies African American managers can use when managing Hispanic workers with ESL in a government agency in Illinois. The importance of this study is exemplified in the findings; the results provided a new way of thinking about the social world that is interwoven in an intercultural environment. The …

The Influence On Employee Engagement Of Employee Negative Perceptions Of Leader Actions, Vickki Gamol Johnson

Walden Dissertations and Doctoral Studies

In 2018, only 34% of U.S. workers reported that they were engaged in their jobs, up from 31.5% just 4 years prior. Employee engagement, organizational well-being, and leader actions are significant to companies and brands in a highly competitive, modern business environment. The alarmingly low rate of employee engagement resulted from negative perceptions of leaders. The purpose of this qualitative study was to explore the phenomenon of disengagement through the lived experiences of employees in the public sector who had negative perceptions of their leaders. The conceptual lens was Herzberg’s theory mapped onto Maslow’s hierarchy to address the research question …

A Study Of The Lived Experiences Of Ghanaian Women In Leadership, Dorothy Roseline Appiah

Walden Dissertations and Doctoral Studies

Underrepresentation, inequities, and career advancement to senior leadership positions continue to present obstacles for Ghanaian women, affecting their performance in organizations. This qualitative descriptive phenomenological study aimed to explore and understand the lived experiences of Ghanaian women leaders pursuit of professional careers in 5 different organizations and how best to improve them. The conceptual framework used was Eagly and Karau's role congruity theory of prejudice and Scheim's leadership and organizational culture theory. The research question explored the experiences of Ghanaian women leaders pursuit of professional careers in organizations. Fifteen purposefully selected Ghanaian women leaders with at least 10 years of …

Innovation-Driven Growth In Heavy Equipment Firms, Raynald J. Gallant

Walden Dissertations and Doctoral Studies

Lack of innovation-driven revenue growth can have adverse effects on organizational outcomes. Company leaders who do not pursue innovation put their firm's survival at risk. Grounded in Christensen's theory of disruptive innovation and Rogers's diffusion of innovation theory, the purpose of this quantitative correlational study was to examine the relationship between company culture, company maturity, company revenue, and innovation-driven revenue growth rate in global heavy equipment manufacturing firms. Secondary data (N = 50) were collected from the Yellow Table, an annual listing of the top 50 global heavy equipment companies by revenue from 2002 to 2018. The results of the …

From Political Hebraism And Jewish Law To The Comparative Paradigm, Amos Israel-Vleeschhouwer

Touro Law Review

No abstract provided.

Is “Vital Motion” A Halakhic Concept?, Ira Bedzow, Noam Stadlan, John Loike

Touro Law Review

No abstract provided.

A New Era: Digital Curtilage And Alexa-Enabled Smart Home Devices, Johanna Sanchez

Touro Law Review

No abstract provided.

Psychopharmacology And Addictive Behaviors, North Carolina Agricultural And Technical State University

Open Educational Resources Syllabus Review

This course addresses the ways in which alcohol and other addictive substances affect the brain and behavior. Addictions addressed include, but are not limited to, alcohol and other drug abuse, gambling addiction, sex addiction, eating disorders, and criminal offense. This course will also explore the different classes of drugs and the associated street names for each drug.

Environmental And Occupational Toxicology, North Carolina Agricultural And Technical State University

Open Educational Resources Syllabus Review

Environmental health is associated with recognizing, assessing, understanding and controlling the impacts of people in their environment and the impacts of the environment on the public health. The science of environmental health spans a wide range of topics, requiring the use of multidisciplinary approaches to study the impact of environmental factors on human health. Toxicology, a major component of environmental health, can be broadly defined as the science that explores how drugs and chemicals adversely affect human health. Student enrolled in this course will learn the basic principles of toxicology as they apply to human health. Topics will include activation …

Preparation, Characterization, And Binding Profile Of Imprinted Semi-Ipn Cryogel Composite For Aluminum, Shahnila Shah, Huma Shaikh, Najma Memon, Muhammad Igbal Bhanger, Tahira Qureshi, Humaira Khan, Adi̇l Deni̇zli̇

Turkish Journal of Chemistry

Human body is greatly exposed to aluminum due to its high abundance in the environment. This nonessential metal is a threat to the patients of chronic renal disorders, as it is easily retained in their plasma and quickly accumulates in different tissues. Thus, there is great need to remove it from the aqueous environment. In this study, Al$^{3+}$ imprinted semiinterpenetrating polymer network (semi-IPN)-based cryogel composite was prepared and applied for the purification of environmental and drinking water samples from aluminum. Poly (2-hydroxyethyl methacrylate) (pHEMA) discs were produced via cryogenic treatment and imprinted semi-IPN was introduced to the 3-(trimethoxysilyl) propyl acrylate-modified …

Chemical Composition, Antimicrobial, And Lipase Enzyme Activity Of Essential Oil And Solvent Extracts From Serapias Orientalis Subsp. Orientalis, İshak Eri̇k, Gözde Kiliç, Eli̇f Öztürk, Şengül Alpay Karaoğlu, Nuretti̇n Yayli

Turkish Journal of Chemistry

The volatile components of essential oil (EO), SPME, and SPME of solvent extracts (n-hexane, methanol, and water) obtained from fresh Serapias orientalis subsp. orientalis(Soo) were analyzed by GC-FID/MS. EO of Soo gave 11 compounds in the percentage of 99.97%; capronaldehyde (37.01%), 2-(E)-hexenal (23.19%), and n-nonanal (19.05%) were found to be major constituents. SPME GC-FID/MS analyses of fresh plant and solvent extracts of Soo revealed 7, 12, 7, and 4 compounds within the range of 99.7% to 99.9%. Limonene (76.5%, 41.7%, and 61.3%) was the major compound in SPMEs of the n-hexane and methanol extracts. α-Methoxy-p-cresol (52.9%) was the main component …

The Extension Newsletter, Issue 103, Winter 2020, Wright State University Retirees Association

The Extension Newsletter

An eight page newsletter from the Wright State University's Retirees Association.

Sizing Up Categories, Lee Anne Fennell

Public Law and Legal Theory Working Papers

Categories intentionally create discontinuities. By breaking the world up into cognizable chunks, they simplify the information environment. But the signals they provide may be inaccurate or scrambled by strategic behavior. This Article considers how law might approach the problem of optimal categorization, given the role of categories in managing and transmitting information. It proceeds from the observation that high categorization costs can be addressed through two opposite strategies—making classifications more fine-grained (splitting), and making classifications more encompassing (lumping). Although continuizing and other forms of splitting offer intuitive answers to inaccurate classification and gaming along category lines, lumping is sometimes a …

Evaluating Historical Paradigms Of Sterility In Perinatal Microbiology And Ramifications For Pregnancy Outcomes, Jonathan Greenberg

Wayne State University Dissertations

Next-generation sequencing technologies, especially 16S rRNA gene and metagenomic sequencing have allowed investigations of low microbial biomass tissues of the human body. While these sequencing methodologies have provided large amounts of reliable data for higher microbial biomass sites, such as the mouth, intestine, and vagina, tissues of low microbial biomass sites are subject to specific caveats that were not appropriately considered in early investigations of these sites. Low microbial biomass sites of particular interest have included those of the reproductive and urinary systems. Utilization of DNA sequencing methodologies have allowed researchers to challenge existing paradigms of sterility around these sites …

Titanium Nitride Nanotube Electrodes Used In Neural Signal Recording Application And Neurotransmitter Detection, Gui Chen

Wayne State University Dissertations

Electrode probes are devices widely used for stimulating and recording neural cell signals in the neuroscience field, which can convert the ion potential generated by electrochemical activities into an electronic potential that can be measured by the external instrument systems. A stable neural interface that effectively communicates with the nervous system via electrode is much important for the robust recording and the long-term monitoring of the activity of the neural signals. These probes are designed to minimize tissue damage for superior signal quality. Each probe’s mechanical, geometric, and electrical characteristics are precise and highly reproducible for consistent, high-quality results. There …

Hormonal Regulation Of Glycine Decarboxylase And Its Metabolic Outcomes, Ruta Milind Jog

Wayne State University Dissertations

The amino acid glycine is involved in generation of multiple critical metabolites including glutathione, heme, and creatinine. Interestingly, in both humans and rodents, circulating glycine levels are significantly reduced in obesity, glucose intolerance, type II diabetes and non-alcoholic fatty liver disease. The glycine cleavage system is the predominant glycine degradation pathway in humans. The rate-limiting enzyme of glycine cleavage system is glycine decarboxylase (GLDC), and loss-of-function mutations of GLDC cause hyperglycinemia. Here, we show that GLDC gene expression is upregulated in livers of mouse models of diabetes and diet-induced obesity as well as in the fasted state in normal animals. …

Drug Testing In The U.S. Trucking Industry: Hair Vs. Urine Samples And The Implications For Policy And The Industry, M. Douglas Voss, Joe Cangelosi

Journal of Transportation Management

Virtually everything we own was transported by truck at some point. Around 3.5 million truck drivers haul almost 71% of U.S. freight. To ensure the safety of our roadways, the U.S. government requires all drivers to pass urinalysis drug screens. However, urinalysis drug screens are easily thwarted and some trucking companies use hair drug screens, a more stringent test. This research examines trucking industry data and finds about 300,000 truck drivers would be removed from their positions if forced to pass a hair drug test. Hair testing opponents argue that the test is biased against ethnic minority groups. Comparing urine …

Exploring Bullying And Peer Victimization Among African American Adolescents In Chicago’S Southside, Jeoung Min Lee

Wayne State University Dissertations

Adolescent bullying is a serious concern for adolescents, parents, teachers, school officials, and the public. While many studies have explored serious forms of violence (e.g., gang violence and homicide) among urban adolescents, relatively few studies have examined “less serious forms of violence,” such as bullying among these adolescents. This dissertation research, which is divided into three studies, aims to examine antecedents of bullying and peer victimization as well as psychosocial outcomes of peer victimization from a sample of 639 urban African American adolescents in Chicago’s Southside. The first study applies Bronfenbrenner’s ecological systems perspective and explores factors that are correlated …

Mental Health Service Utilization Among Urban Adolescents: The Roles Of Perceived Mental Health Problems, Attitudes Towards Professional Help, And Stigma, Yi Tak Tsang

Wayne State University Dissertations

Mental health among adolescents is widely acknowledged as a significant concern in the United States. Based on a national survey, Merikangas et al. (2010) found that among 13-17 year olds, 42% to 48% reported experiencing mental health concerns. It is estimated that only half of adolescents with mental health problems utilize mental health services (Costello et al., 2014). An initial study found that caregivers of disadvantaged youth appeared to function as the “gatekeepers” to mental health services (Tsang et al., 2020). Also, the results suggested that positive attitude towards professional psychological help, but not stigma, predicted service enrollment. The current …

Synthesis Of Bradyrhizose And The Equatorial Glycosides Of 3-Deoxygenation-D-Mango-Oct-2-Ulosonic Acid, Philemon O. Ngoje

Wayne State University Dissertations

ABSTRACT

SYNTHESIS OF BRADYRHIZOSE AND THE EQUATORIAL GLYCOSIDES OF 3- DEOXY-D-MANNO-OCT-2-ULOSONIC ACID

Chapter one provides a general view on the background to the research in two parts. The first part begins with an introduction on the significance of the lectin-carbohydrate interactions in leguminous plants. Then the structure and role of O-antigen lipopolysaccharides in the symbiotic nitrogen cycle, and the mechanism and significance of the cycle in leguminous plants growth are introduced. The role, isolation and characterization of bradyrhizose are also introduced; and the previous syntheses of bradyhizose and of related bicyclic compounds presented.

The second part of chapter one starts …

Addiction And Expression, Luke Morgan

UC Law Constitutional Quarterly

Addictive products—such as tobacco, alcohol, and gambling—have been considered legitimate regulatory targets throughout American history and for thousands of years prior. Expressive products—such as newspapers, books, movies, and video games—have in the United States been considered essentially immune from content-based regulation, thanks to the First Amendment. But what if the content of an expressive product makes it addictive? Which tradition must give in: the ancient power of legislatures to protect society at large from the wideranging impacts of addiction, or the legal shield that has generated a thriving culture of artistic independence? This Article is the first to explore the …

Acute Physiological Response By The Plethodontid Salamander Eurycea Cirrigera (Southern Two-Lined Salamander) To Predation Stress From Alarm Chemicals And Predator Kairomones, G A. Marvin

Biology

Plethodontid salamanders may reduce predation risk via behavioral responses to predator kairomones and alarm chemicals from injured salamanders. However, it not known whether such predator cues prompt acute physiological responses, which may enhance arousal and the physical ability to escape from a predator. I examined whether predator chemical cues elicit an acute cardiac response in Eurycea cirrigera (Green, 1831) (Southern Two-lined Salamander). I compared heart rates before and after exposure to the odor of the large predatory Pseudotriton ruber (Sonnini de Manoncourt and Latreille, 1801) (Red Salamander) and exposure to alarm chemicals from homogenized skin of conspecifics. For two controls, …

The Limits Of Inclusion: Teacher Beliefs And Experience With Inclusion Of Students With Learning Disabilities, Allegra Johnson

LMU Theses and Dissertations

General education teachers are critical contributors to the successful inclusion of students labeled with learning disabilities in general education classrooms. Similarly, teacher beliefs about disability labels significantly influence how teachers include or exclude students labeled with a learning disability in their classrooms. This qualitative study investigated eight secondary general education teachers’ attitudes towards inclusion and their experiences teaching students labeled with a learning disability from a Critical Disabilities Studies perspective. Data were collected using an innovative qualitative method, Q methodology, in order to surface distinct perspectives within the group about inclusion and the experience of teaching students labeled with a …