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

Physical Sciences and Mathematics Commons

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

Articles 1 - 22 of 22

Full-Text Articles in Physical Sciences and Mathematics

A Phenomenological Exploration Of The Experiences Of High School Students Enrolled In School-Wide College Readiness Programs, Sherlina Thomas Jan 2016

A Phenomenological Exploration Of The Experiences Of High School Students Enrolled In School-Wide College Readiness Programs, Sherlina Thomas

Walden Dissertations and Doctoral Studies

In the early 1980s, the United States experienced a high school dropout epidemic, leading school systems to adopt reform efforts. College readiness programs (CRPs) became a tool to address educational disparities in secondary and postsecondary education for over three decades. While decreases occurred in the overall high school dropout rate across racial and ethnic groups, they have been minimal. This study addressed a research gap on the lack of student input and perceptions about their experiences in CRP programs. This phenomenological study used in-depth, semi-structured interviews with criterion-selected former high school students from 3 schools within the ABC County School …


The Bop Energy Challenge And Pro-Poor Responses: Strategic Entry Pathways For Entrepreneurs, Felix Motekah Tang Jan 2016

The Bop Energy Challenge And Pro-Poor Responses: Strategic Entry Pathways For Entrepreneurs, Felix Motekah Tang

Walden Dissertations and Doctoral Studies

Many large multinational energy company leaders lack strategies to successfully enter and thrive in bottom of the pyramid (BOP) markets. The purpose of this single case study was to explore strategies using a purposeful selection of 7 senior managers from a U. S. based global multinational energy leader with experience in BOP markets in the Republic of Cameroon. The BOP concept served as the conceptual framework for the study. Data were collected through semistructured interviews with senior managers, relevant websites, and government publications. Several themes emerged that were narrowed through categorical aggregation to identify strategies. Major themes included BOP readiness …


Servant Leadership And Non Servant Leadership Organization Triple Bottom Line Reporting Outcomes, Lydia M. Daniels Jan 2016

Servant Leadership And Non Servant Leadership Organization Triple Bottom Line Reporting Outcomes, Lydia M. Daniels

Walden Dissertations and Doctoral Studies

The competitive environment of the 21st century, failure of U.S. companies, and the financial crisis of 2008 have moved leadership expectations to the forefront of research. However, there is a lack of empirical research about organizational reporting outcomes of self-identified servant leadership (SL) organizations compared to self-identified nonservant (non-SL) organizations. Guided by Greenleaf's SL theory, the purpose of this study was to compare information on organizational data for triple bottom line (TBL) reporting outcomes in SL organizations and non-SL organizations. Using causal comparative research design and global reporting initiative data with a sample of 12 organization reports, reporting outcomes were …


Exploring Maintenance And Facility Operations Strategies For California Community Colleges, Virginia Parras Grande Jan 2016

Exploring Maintenance And Facility Operations Strategies For California Community Colleges, Virginia Parras Grande

Walden Dissertations and Doctoral Studies

California community college leaders are looking for strategies to sustain facilities and maintenance operations because the governor only approved the allocation of $87.5 million in the 2014-2015 Budget Act for facilities maintenance operations. Guided by the change and strategy theories, the purpose of this multicase study was to explore the strategies that a select group of college leaders have used to sustain or improve their facilities maintenance operations. The data collection process included a review of college planning documents and semistructured interviews with 10 senior administrators from 3 large California community colleges who have used strategies to address sustaining or …


Small Retail Business Owner Strategies Needed To Succeed Beyond 5 Years, Colonel Jaime Solis Jan 2016

Small Retail Business Owner Strategies Needed To Succeed Beyond 5 Years, Colonel Jaime Solis

Walden Dissertations and Doctoral Studies

Small businesses accounted for 99% of the firms in private industry, provided 38% of the goods and services sold in the United States, and hired 55% of the labor force each year between 2012 and 2015. From 1993 to 2013, small firms accounted for 63% of new work generated while more than 50% of U.S. small businesses failed inside of 5 years and at least 20% failed during the first year. The purpose of this multiunit case study was to explore the strategies small retail businesses used to achieve sustainability beyond 5 years in a purposefully selected county in Virginia. …


Developing Sustainable Leadership Strategies To Increase Corporate Revenue, Linda Goulet Crosby Jan 2016

Developing Sustainable Leadership Strategies To Increase Corporate Revenue, Linda Goulet Crosby

Walden Dissertations and Doctoral Studies

The business environment is in constant flux where stakeholders encourage organizational leaders to consider sustainable business tactics alongside corporate profits. While most business leaders recognize the importance of including sustainability into corporate goals, evidence suggested that only 10% have sustainable action plans in place. Using the honeybee leadership model as the conceptual framework, the purpose of this qualitative case study was to explore the sustainable leadership strategies that business leaders from small- and medium- sized companies integrated to increase corporate revenue. These companies were B Corp certified which ensures a third party endorsement of sustainable practices. The data were collected …


Assessment Of Her2-Neu In Breast Cancer Lines Upon Differential Exposures To Xenoestrogens, Abha Aggarwal Jan 2016

Assessment Of Her2-Neu In Breast Cancer Lines Upon Differential Exposures To Xenoestrogens, Abha Aggarwal

Walden Dissertations and Doctoral Studies

Synthetic xenoestrogens have differential estrogenic properties. Research has shown that exposures to xenoestrogens could promote breast cancer by disrupting normal function of the human epidermal growth factor receptor 2 (Her2) gene. Although animal models demonstrated a connection between xenoestrogen exposure and Her2 activity, no study using human cells has systematically examined their carcinogenic potential influencing the Her2 gene expression. Furthermore, breast cancer cells are phenotypically disparate (ER+, Her2+), with some phenotypes (Her2+), leading to more aggressive disease. This study aimed to dosimetrically assess the carcinogenic potential of commonly used xenoestrogens influencing Her2 gene expression, and delineate cellular phenotypes at greater …


Small Aviation Business Success Strategies For Profitability, Christina Hiers Jan 2016

Small Aviation Business Success Strategies For Profitability, Christina Hiers

Walden Dissertations and Doctoral Studies

Ninety-five percent of all aviation businesses are small businesses; from 2009-2012, small aviation business operations decreased by 10.2% and resulted in a loss of $4.4 billion in revenue. The purpose for this multiunit case study was to explore what strategies small aviation businesses leaders used to reduce or control operating expenses for profitability. The sample comprised 3 small aviation businesses located in Middle Tennessee. The conceptual framework for this study built upon systems theory and sustainability theory. The data were collected through semistructured interviews and company documents. Member checking was completed to strengthen creditability and trustworthiness. Based on the methodological …


Perceptions Of Emergency Preparedness Among Immigrant Hispanics Living In Oklahoma City, Oklahoma, Rebekah Doyle Jan 2016

Perceptions Of Emergency Preparedness Among Immigrant Hispanics Living In Oklahoma City, Oklahoma, Rebekah Doyle

Walden Dissertations and Doctoral Studies

Tornadoes are occurring with increased frequency in Oklahoma. Emergency preparedness planning is essential to decreasing individuals' risks of injury or death from a tornado. Research on immigrant Hispanics' knowledge and perceptions of emergency preparedness is limited. The purpose of this study was to explore the perceptions and lived experiences of immigrant Hispanics who had experienced a tornado or other crisis weather conditions in Oklahoma during spring of 2013. The research questions explored their perceived risk for injury and knowledge of tornado preparedness planning. The health belief model provided the theoretical underpinnings for this qualitative phenomenological study. Semi structured interviews were …


Decision Making Of Environmental Engineers On Project Selection, Millicent Amanda Davis Jan 2016

Decision Making Of Environmental Engineers On Project Selection, Millicent Amanda Davis

Walden Dissertations and Doctoral Studies

Some environmental engineers do not understand how to perceive profitable opportunities in redeveloping the large number of contaminated brownfield sites in New Jersey. The purpose of this qualitative exploratory case study was to find effective decision-making strategies that help environmental engineers acquire profitable environmental redevelopment projects. The target population consisted of 4 environmental engineers in an environmental organization in Camden County, New Jersey who possessed proven decision-making strategies that helped them acquire profitable environmental redevelopment projects in the past 5 years. The conceptual framework for this study was the multiple criteria decision method (MCDM). Semistructured interviews were conducted with the …


Women Entrepreneurs: Keys To Successful Business Development And Sustainability Beyond Five Years, Delores Duncan Foster Jan 2016

Women Entrepreneurs: Keys To Successful Business Development And Sustainability Beyond Five Years, Delores Duncan Foster

Walden Dissertations and Doctoral Studies

Women-owned businesses are one of the fastest growing entrepreneurial populations, accounting for 8 million of the 28 million small businesses in the United States. Small businesses fail at a rate of 55% by the 5th year of operation and women, who own over 30% of all small businesses, contribute significantly to the 55% small business failure rate. Using Schumpeter's framework, this single exploratory case study investigated how women entrepreneurial small business owners use strategies to sustain their business operation beyond 5 years. A purposeful sample identified 2 women salon small business owners located in the Macon, Georgia metro area. Data …


Core Leader Competencies For Implementing Sustainability Strategies In Small And Medium-Sized Enterprises, Alan William Jackson Jan 2016

Core Leader Competencies For Implementing Sustainability Strategies In Small And Medium-Sized Enterprises, Alan William Jackson

Walden Dissertations and Doctoral Studies

Because small- and medium-sized enterprises contribute as much as 70% of the world's pollution, small-business leaders need to develop and implement strategic approaches to sustainable development. Global sustainable development spending may reach $5 trillion by 2030. Guided by leadership competency theory, this qualitative multiple case study explored the core competencies of 5 independent small business leaders who had successfully implemented environmentally sustainable initiatives in their manufacturing firms in eastern Nebraska. Interviews and company planning documents including strategic business plans were gathered, coded, and cross-case analyzed, and member checking was periodically conducted to strengthen the trustworthiness of interpretations. Thematic analysis identified …


Examining Employee Motivation, Environmental Systems, And Corporate Social Responsibility In Proenvironmental Behavior, Brian Warrick Jan 2016

Examining Employee Motivation, Environmental Systems, And Corporate Social Responsibility In Proenvironmental Behavior, Brian Warrick

Walden Dissertations and Doctoral Studies

The World Health Organization has pointed to climate change as the most significant issue in the 21st century as a result of greenhouse gas emissions and environmental pollution. Organizations are leaning toward corporate social responsibility (CSR) and environmental management systems (EMS) to reverse the current trend; however, these efforts are often ineffective or pooly implemented. The purpose of this quantitative study was to determine the extent to which employees' proenvironmental behavior relates to their protection motivation and organizational identification, as well as their perception and knowledge of the organization's CSR and EMS, respectively. Using social identity as the theoretical framework, …


Effects Of Gender And Spirituality On Adults' Resilience To Daily Non-Traumatic Stressors, Lois S. Harris Jan 2016

Effects Of Gender And Spirituality On Adults' Resilience To Daily Non-Traumatic Stressors, Lois S. Harris

Walden Dissertations and Doctoral Studies

Researchers have conducted several studies of spirituality as it relates to individuals' coping strategies and resilience when facing life trauma. There is less research, however, on spirituality as it relates to adults' resiliency to daily non-traumatic stressors. The purposes of the current study were to examine the relationship between spirituality and adults' resilience to daily, non-traumatic stressors and assess whether gender has a moderating effect on this relationship. A quantitative correlational study based on Lazarus's transactional model of stress and coping using convenience sampling, an online survey (N= 94) was administered. Of the 94 participants ages 19 to 68, 66 …


Drinking Water And Autism: Using Spatial Cluster Detection To Explore Patterns Of Autism Cases In Lane County, Oregon, Sherry Sandreth Jan 2016

Drinking Water And Autism: Using Spatial Cluster Detection To Explore Patterns Of Autism Cases In Lane County, Oregon, Sherry Sandreth

Walden Dissertations and Doctoral Studies

Autism Spectrum Disorders (ASD) are a complex array of neurological disorders with a diverse presentation, multiple etiologies, and long-term ramifications. Prevalence of ASD in the United States is about 1 in 50 children as of 2013, making it a significant public health problem. The etiology is not understood, and it is widely accepted that it is multicausal, with genetic and environmental influences. Prior research suggests an association between water source and ASD. Contaminants such as lead, arsenic, mercury, pharmaceuticals and pesticides found in water are associated with developmental disorders suggesting that a systematic review focused on water source was warranted. …


Water Management Efficiency In The Food And Beverage Industry, Maria Del C Reyes Torres Jan 2016

Water Management Efficiency In The Food And Beverage Industry, Maria Del C Reyes Torres

Walden Dissertations and Doctoral Studies

Water is critical for food production, food security, and health. Water quality management influences freshwater sustainability, land, and energy administration. Global agriculture accounts for more than 70% of all water consumption; the fertilizer, manure, and pesticide overspills are chief sources of water pollution worldwide. On a global scale, food-related waste directly impacts local food production and water resource management. The purpose of this multiple-case study on the food and beverage (FB) industry in the State of Georgia was to identify successful strategies for improving water management efficiency. The concepts of systems thinking, adaptive resource management, and integrated water resource management …


Methylmercury Exposure Via Canned Tuna Fish Consumption And Breast Cancer, Jennifer Bodenrader Jan 2016

Methylmercury Exposure Via Canned Tuna Fish Consumption And Breast Cancer, Jennifer Bodenrader

Walden Dissertations and Doctoral Studies

Widespread consumption of canned tuna fish since the 1950s may explain some of the increase in breast cancer prevalence in the United States and Europe. Although canned tuna is the primary source of human exposure to methylmercury, its role as an estrogen activating metalloestrogen has been overlooked in the etiology and incidence of breast cancer. Carcinogenic theory asserts that increased exposure to estrogen elevates the risk of breast cancer. The purpose of this population-based, case control study was to examine the association between canned tuna consumption, total blood mercury, and breast cancer in the NHANES 2003-2006 surveys. A multivariable logistic …


Environmental Leadership: Exploring Environmental Dissonance Involving Natural Resource Consumption And Ecosystem Degradation, Thomas L. Tochterman Jan 2016

Environmental Leadership: Exploring Environmental Dissonance Involving Natural Resource Consumption And Ecosystem Degradation, Thomas L. Tochterman

Walden Dissertations and Doctoral Studies

As the corporate world, communities, and individuals become more globalized and demands on natural resources increase, a new emphasis on environmental leadership including a new pragmatic environmental ethos is needed to meet certain basic human needs of future generations. The research problem addressed in this study was the lack of knowledge concerning how environmental cognitive dissonance influences consumption practices related to inefficient resource utilization and ecosystem degradation. The purpose of this study was to provide an understanding of the breadth and depth of environmental cognitive dissonance among visitors to the Kruger National Park in South Africa. The research questions addressed …


Small Business Strategies For Sustainability Beyond 10 Years, Gabriel E. Warren Jan 2016

Small Business Strategies For Sustainability Beyond 10 Years, Gabriel E. Warren

Walden Dissertations and Doctoral Studies

Small businesses are vital to the health of the United States economy, as they account for approximately 50% of all jobs and 99% of all firms. Historically, there has been a problem with small businesses being able to sustain their operation beyond 10 years. The purpose of this multiple case study was to explore the business strategies some small business owners used to sustain their company beyond 10 years of operation. The sample consisted of 3 small business owners who have been in operation for 10 or more years in Birmingham, Alabama. The conceptual framework for this study was the …


Strategies Affecting The Sustainability Of Small Businesses, Malissa A. Bush Jan 2016

Strategies Affecting The Sustainability Of Small Businesses, Malissa A. Bush

Walden Dissertations and Doctoral Studies

Small business owners bolster the emergence and growth of local communities. However, many small businesses do not survive beyond 5 years. Based on systems theory, the purpose of this multiple case study was to explore the strategies used by small business owners to develop and maintain viable and long-lasting businesses. Using a multiple case study design, semistructured interviews were conducted with 6 retail business owners in DeKalb County, Georgia who were able to develop and maintain viable and long-lasting businesses. These small business owners provided detailed information on strategies used to sustain their businesses. Semistructured interviews allowed for in-depth conversations …


Relocation Based On Slow-Onset Climate-Induced Environmental Change In Keta, Ghana, Abdul-Moomin Ansong Salifu Jan 2016

Relocation Based On Slow-Onset Climate-Induced Environmental Change In Keta, Ghana, Abdul-Moomin Ansong Salifu

Walden Dissertations and Doctoral Studies

Coastal indigenous communities in Keta, Ghana, are experiencing resettlement as a result of slow-onset, climate-induced flooding and erosion. Previous researchers have documented the risk of relocation from rapid-onset events, but little is known about the effectiveness of policies developed in response to slow-onset changes. This phenomenological study investigated the ongoing lived experiences of adult household members in Keta who were relocated by the government. Jun's critical theory provided a constructionist interpretive framework to determine whether Ghana's national policy on climate change resettlement adequately meets Rawls's criteria for distributive social justice. Policy documents and transcriptions of interviews with a purposeful sample …


Building Designers' Perception And The Effect On Sustainability In Malawi, Lloyd Ndau Jan 2016

Building Designers' Perception And The Effect On Sustainability In Malawi, Lloyd Ndau

Walden Dissertations and Doctoral Studies

Environmental sustainability in buildings is an important part of preserving the environment and reducing climate change. The increasing amount of physical infrastructure systems in Malawi has not been accompanied by policy-makers clearly understanding perceptions and attitudinal behaviors of building designers to promote environmental sustainability. Some building designers in Malawi might not be practicing sustainability innovations adequately, requiring more research to understand their perceptions and behaviors. The purpose of this mixed methods sequential and explanatory study was to explore how building designers' behaviors relate to the implementation of sustainability innovations in Malawi. Ajzen's theory of planned behavior explaining how attitudinal behaviors …