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Articles 137311 - 137340 of 304014

Full-Text Articles in Physical Sciences and Mathematics

Junior High School Teachers' Perceptions Of Math Instruction For African American Students, Sandra Denise Richardson Jan 2016

Junior High School Teachers' Perceptions Of Math Instruction For African American Students, Sandra Denise Richardson

Walden Dissertations and Doctoral Studies

A mathematics achievement gap exists between 8th grade African American students and other ethnic groups. Guided by the conceptual framework of constructivism, the purpose of this case study was to examine 8, Grade 8 math teachers' perceptions of factors contributing to mathematical performance gap in their African American students and what instructional strategies can be used to help reduce the achievement gap in southwest Georgia. Data were obtained through interviews and classroom observations and were coded and analyzed using typological analysis, followed by inductive analysis. The results of the data revealed teachers perceived recruiting and retaining African American teachers and …

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Exploring Leader-Initiated Change Management For Adopting Cloud Services, Nancy Marie Landreville Jan 2016

Exploring Leader-Initiated Change Management For Adopting Cloud Services, Nancy Marie Landreville

Walden Dissertations and Doctoral Studies

Cloud technology requires a virtualized ubiquitous and scalable environment with shared resources. The general problem in cloud adoption is the absence of standardization across organizations. A standardized approach remained elusive since the inception of the Cloud First mandate. The purpose of this study was to explore leader-initiated change management (LICM) practices in cloud adoption within organizations. The theoretical framework included the classical theories of Kurt Lewin's organization change management, leader-member exchange, intentional change, and appreciative inquiry. A multiple case study design approach facilitated the exploration of LICM-value added practices to identify standardization in cloud adoption practices. Data collection included semistructured …

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Awareness Of Clinical Laboratory Sciences And Shortage Of Clinical Laboratory Scientists In The 21st Century, Cynthia Funnye Doby Jan 2016

Awareness Of Clinical Laboratory Sciences And Shortage Of Clinical Laboratory Scientists In The 21st Century, Cynthia Funnye Doby

Walden Dissertations and Doctoral Studies

Retiring baby boomers and the lack of interest and awareness among college students to enroll in an accredited Clinical Laboratory Science (CLS) program have created a shortage of CLS professionals in the 21st century. The U.S. Bureau of Labor Statistics predicts 18,000 CLS vacancies by 2018. However, only about 5,000 students graduate from accredited CLS programs each year. The purpose of this study was to explore students' perceptions of allied health professions and factors that influenced students and CLS professionals to select CLS as a profession. Bandura's social cognitive career theory served as the theoretical framework for this phenomenological study. …

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An Exploration Of Baby Boomer Mass Retirement Effects On Information Systems Organizations, Nithyanandam Mathiyazhagan Mathiyazhagan Jan 2016

An Exploration Of Baby Boomer Mass Retirement Effects On Information Systems Organizations, Nithyanandam Mathiyazhagan Mathiyazhagan

Walden Dissertations and Doctoral Studies

The potential knowledge loss from Baby Boomer generation employee retirements can negatively affect information systems organizations. The purpose of this hermeneutic phenomenology study was to explore the lived experiences of the leaders and managers of information systems organizations as they tried to maintain operational continuity after Baby Boomer worker retirements. The impact of this issue was the operational continuity after the Baby Boomer worker retirement. The social impact of this issue was the knowledge loss events that might result in business loss or even bankruptcy. McElroy's knowledge life cycle model was the conceptual framework for this study that included knowledge …

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Strategies To Control Internal Factors Affecting Information Systems Projects In Puerto Rico, Annie Luz Roman Acevedo Jan 2016

Strategies To Control Internal Factors Affecting Information Systems Projects In Puerto Rico, Annie Luz Roman Acevedo

Walden Dissertations and Doctoral Studies

Many project managers and business leaders lack effective strategies to control internal factors that affect information systems (IS) projects, which may impede leadership's ability to respond to market changes. The purpose of this multiple case study was to explore strategies used by 6 purposefully selected project managers who successfully implemented information system development (ISD) projects by controlling the internal factors that affected different ISD project phases in Puerto Rico's telecommunication service industry. The framework that guided this study was coordination theory. The data collection process included semistructured interviews and project documentation including business requirements, project charters, project plans, and lessons …

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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 …

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Evaluating Federal Information Technology Program Success Based On Earned Value Management, Mae Moy Jan 2016

Evaluating Federal Information Technology Program Success Based On Earned Value Management, Mae Moy

Walden Dissertations and Doctoral Studies

Despite the use of earned value management (EVM) techniques to track development progress, federal information (IT) software programs continue to fail by not meeting identified business requirements. The purpose of this logistic regression study was to examine, using IT software data from federal agencies from 2011 to 2014, whether a relationship between schedule variance (SV), cost variance (CV), and actual cost (AC) could predict the success of IT software program, as operationalized by meeting the identified business requirements. The population of interest was 132 IT software programs developed between 2011 and 2014 for federal agencies. The sample source was an …

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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 …

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The Impact Of Transformational Leadership Style On The Success Of Global Virtual Teams, Shery Wojtara-Perry Jan 2016

The Impact Of Transformational Leadership Style On The Success Of Global Virtual Teams, Shery Wojtara-Perry

Walden Dissertations and Doctoral Studies

Organizations in the age of modern technology have a diverse workforce, who are spread around the globe, and the business leaders of the 21st century need to understand how best to manage, overcome new challenges, and know the various skills of team members to capitalize on their differences and unique skills. To allow those geographically dispersed workers to reach their full potential and facilitate team success. Global virtual teams (GVTs) operate in complex environments characterized by diverse cultural and organizational elements. The primary purpose of this correlational and nonexperimental quantitative research was to examine the impact of transformational leadership on …

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Comparative Analysis: Successes And Failures Of St. Louis, Stephen Anane-Boakye Jan 2016

Comparative Analysis: Successes And Failures Of St. Louis, Stephen Anane-Boakye

Walden Dissertations and Doctoral Studies

The St. Louis School District (SLSD) provided its students with a virtual education program (VEP) but abandoned it following a cut in federal funding, omitting an alternative pathway for students to complete their education. The problem addressed in this study was the effect of technology and management's decision to discontinue the VEP. The purpose of this qualitative study was to determine management's role and the effect of the technology in discontinuing the VEP. Dewey's theory of education and Koskela and Howell's theory of management established the theoretical foundation for the study. A purposeful sampling selection approach was used to recruit …

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An Online Statistics Course From Faculty And Students' Perspectives: A Case Study, Ruth Best Jan 2016

An Online Statistics Course From Faculty And Students' Perspectives: A Case Study, Ruth Best

Walden Dissertations and Doctoral Studies

Faculty at a private college in the northeastern United States found students lacked prerequisite mathematical skills and were unable to transfer quantitative reasoning skills to upper level business courses. Guided by Mezirow's transformative learning theory and Knowles' approach to self-directed learning, this study examined how undergraduate students learn statistics online. The purpose of this qualitative embedded case study was to examine faculty and students' perspectives about the online statistics course design and delivery while exploring possible barriers to students' learning. Data collection occurred by review of course documents and the learning management system. Archival data generated questions for semistructured interviews …

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Adoption Of Electronic Health Record Systems Within Primary Care Practices, Marvin Leon Reid, Jr. Jan 2016

Adoption Of Electronic Health Record Systems Within Primary Care Practices, Marvin Leon Reid, Jr.

Walden Dissertations and Doctoral Studies

Primary care physicians (PCPPs) have been slow to implement electronic health records (EHRs), even though there is a U.S. federal requirement to implement EHRs. The purpose of this phenomenological study was to determine why PCPPs have been slow to adopt electronic health record (EHR) systems despite the potential to increase efficiency and quality of health care. The complex adaptive systems theory (CAS) served as the conceptual framework for this study. Twenty-six PCPPs were interviewed from primary care practices (PCPs) based in southwestern Ohio. The data were collected through a semistructured interview format and analyzed using a modified van Kaam method. …

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The Association Between Osteoporosis And Early Menopause Following Hysterectomy, Mia Meeyaong-Won Botkin Jan 2016

The Association Between Osteoporosis And Early Menopause Following Hysterectomy, Mia Meeyaong-Won Botkin

Walden Dissertations and Doctoral Studies

Osteoporosis is considered to be the most adverse public health disease associated with substantial mortality among postmenopausal women. Hysterectomy, surgically induced menopause, contributes to the early onset of menopause. However, there was no evidence of an association between early menopause following hysterectomy and osteoporosis among postmenopausal women. The purpose of this quantitative study was to examine the association between demographic and behavioral factors and the prevalence of osteoporosis among hysterectomized postmenopausal women. The integrated theory of health behavior change theoretical framework guided study. Cross-sectional secondary data from the 2009-2010 National Health and Nutrition Examination Survey were used. Multiple logistic regression …

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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. …

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The Successful Implementation Of Electronic Health Records At Small Rural Hospitals, Daniel Richardson Jan 2016

The Successful Implementation Of Electronic Health Records At Small Rural Hospitals, Daniel Richardson

Walden Dissertations and Doctoral Studies

Electronic health records (EHRs) have been in use since the 1960s. U.S. rural hospital leaders and administrators face significant pressure to implement health information technology because of the American Recovery and Reinvestment Act of 2009. However, some leaders and managers of small rural hospital lack strategies to develop and implement EHRs. The focus of this descriptive phenomenological study was to explore lived experiences of hospital leaders and administrators who have used successful strategies to implement EHRs in small rural hospitals. Diffusion of innovation theory shaped the theoretical framework of this study. Data were collected through telephone interviews conducted with participants …

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Role Of Outsourcing In Stress And Job Satisfaction Of Information Technology Professionals, Janell Renee Robinson Jan 2016

Role Of Outsourcing In Stress And Job Satisfaction Of Information Technology Professionals, Janell Renee Robinson

Walden Dissertations and Doctoral Studies

Information technology (IT) outsourcing poses a potential job loss threat to IT professionals, which can decrease job security, job satisfaction, and organizational commitment. The problem that this study addressed was the perceived role of IT outsourcing in the job stress, job dissatisfaction, and turnover intention of IT professionals. The purpose of this study was to explore how job-related stress, job dissatisfaction, and turnover intention within the IT profession are influenced by outsourcing as perceived by IT workers themselves. Phenomenology was the methodology used, and the person-environment fit theory formed the theoretical framework for this study. The research questions addressed outsourcing …

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Innovation Difussion Of Smartphone In Nigeria, Olukunle Ariyo Iyanda Jan 2016

Innovation Difussion Of Smartphone In Nigeria, Olukunle Ariyo Iyanda

Walden Dissertations and Doctoral Studies

Rapid diffusion and use of smartphones in Africa are challenging, given the state of its infrastructural facilities. The problem addressed was a lack of information on the adoption behavior and the sociodevelopmental effect of smartphone acceptance among rural and urban users in Nigeria. The purpose of this study was to examine the adoption behavior and the sociodevelopmental effect of smartphone acceptance among rural and urban residents. Research questions examined the relationship of performance expectancy, social influence, price value, and habit on adopters' intentions to use smartphones, continued use of smartphones, and the sociodevelopmental effect on smartphone users lives and standard …

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Health Information Technology Implementation Strategies In Zimbabwe, Nixjoen Mandaza Mapesa Jan 2016

Health Information Technology Implementation Strategies In Zimbabwe, Nixjoen Mandaza Mapesa

Walden Dissertations and Doctoral Studies

The adoption rate of health information technology (HIT) remains low in developing countries, where healthcare institutions experience high operating costs and loss of revenue, which are related to systems and processes inefficiency. The purpose of this case study was to explore strategies leaders in Zimbabwe used to implement HIT. The conceptual framework of the study was Davis's technology acceptance model (TAM). Data were gathered through observations, review of organizational documents (i.e., policies, procedures, and guidelines), and in-depth interviews with a purposive sample of 10 healthcare leaders and end-users from hospitals in Zimbabwe who had successfully implemented HIT. Transcribed interview data …

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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 …

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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 …

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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 …

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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 …

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Assessing Information Technology And Business Alignment In Local City Government, Leslie Milbourne D'Anjou Jan 2016

Assessing Information Technology And Business Alignment In Local City Government, Leslie Milbourne D'Anjou

Walden Dissertations and Doctoral Studies

Top executives are interested in more transparent and formalized structures, applicable measurements, and clear justification of alignment. Limited or improper information technology governance (ITG) affects the business strategy that will ultimately influence the overall business alignment in local city government agencies (LCGAs). The problem addressed in this study was the lack of information regarding LCGAs IT/business strategic alignment maturity model (SAMM) level and the LCGAs' employment size. The purpose of this survey study was to evaluate 48 LCGA participants in the Southwestern part of the United States and compare their alignment perceptions with their cities' employment size. The theoretical framework …

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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 …

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Falls And Related Injuries Based On Surveillance Data: U.S. Hospital Emergency Departments, George K. Quarranttey Jan 2016

Falls And Related Injuries Based On Surveillance Data: U.S. Hospital Emergency Departments, George K. Quarranttey

Walden Dissertations and Doctoral Studies

Falls can lead to unintentional injuries and possibly death, making falls an important public health problem in terms of related health care cost, incurred disabilities, and years of life lost. Approximately 1 in every 3 Americans ages 65 years and older is at risk of falling at least once every year. Children, young adults, and middle-aged adults are also vulnerable to falls. The purpose of this study was to examine the epidemiology of falls and fall-related injuries using surveillance data from nationally representative samples of hospital emergency departments in United States. The study was guided by a social-ecological model on …

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Social Influence And Organizational Innovation Characteristics On Enterprise Social Computing Adoption, Vincent Di Palermo Jan 2016

Social Influence And Organizational Innovation Characteristics On Enterprise Social Computing Adoption, Vincent Di Palermo

Walden Dissertations and Doctoral Studies

Ample research has been conducted to identify the determinants of information technology (IT) adoption. No previous quantitative researchers have explored IT adoption in the context of enterprise social computing (ESC). The purpose of this study was to test and extend the social influence model of IT adoption. In addition, this study addressed a gap in the research literature and presented a model that relates the independent variables of social action, social consensus, social authority, social cooperation, perceived relative advantage, perceived compatibility, perceived ease of use, perceived usefulness, and organizational commitment to the dependent variables of social embracement and embedment. A …

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Exploring Knowledge Management Models On Information Technology Projects, Alan Richard Foote Jan 2016

Exploring Knowledge Management Models On Information Technology Projects, Alan Richard Foote

Walden Dissertations and Doctoral Studies

One way an organization manages the knowledge of its people is in information technology (IT) projects. Organizations develop IT projects for many socially responsible reasons, including improved health care services and better community services. IT projects do not always achieve the goals of the organization when the knowledge of the stakeholders is not managed for these objectives. For this study the purpose was to address the use of knowledge management (KM) in project management (PM) to improve the success of IT projects in achieving the organizational goals. The research questions were based on KM including its tools and techniques to …

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Empirical Examination Of User Acceptance Of Enterprise Resource Planning Systems In The United States, Rohan Oldacre Jan 2016

Empirical Examination Of User Acceptance Of Enterprise Resource Planning Systems In The United States, Rohan Oldacre

Walden Dissertations and Doctoral Studies

Enterprise resource planning (ERP) systems are complex software packages that support an integrated real-time setting among the various business functions in an entire organization. ERP systems improve productivity, but only to the extent that employees accept and use the systems extensively to perform their duties. The leaders of many organizations have not been able to realize the expected benefits because of a lack of user acceptance. The purpose of this quantitative cross-sectional survey study was to examine the factors that influence user acceptance of ERP systems in the United States. Davis's technology acceptance model was the theoretical foundation used to …

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Black-Scholes Equation And Heat Equation, Charles D. Joyner Jan 2016

Black-Scholes Equation And Heat Equation, Charles D. Joyner

Honors College Theses

First, we present and define the Black-Scholes equation which is used to model assets on the stock market. After that, we derive the heat equation that describes how the temperature increases through a homogeneous material. Finally, we detail how the two equations are related. We introduce and relate the Black-Scholes equation and Heat Equation.

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Web Scraping The Easy Way, Yolande Neil Jan 2016

Web Scraping The Easy Way, Yolande Neil

Honors College Theses

Web scraping refers to a software program that mimics human web surfing behavior by pointing to a website and collecting large amounts of data that would otherwise be difficult for a human to extract. A typical program will extract both unstructured and semi-structured data, as well as images, and convert the data into a structured format. Web scraping is commonly used to facilitate online price comparisons, aggregate contact information, extract online product catalog data, extract economic/demographic/statistical data, and create web mashups, among other uses. Additionally, in the era of big data, semantic analysis, and business intelligence, web scraping is the …

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