Very limited research exists on middle class African American families doing math homework. The present study examines the real life experiences of African American families doing math homework, with special emphasis on emotional and motivational factors that contribute to African American homework practices. This study focuses on 3 African American middle class families, all in 1 elementary school, doing 4th grade math homework. Students in Grade 4 and their parents are interviewed to examine what math homework means to them and what they believe about math homework. In addition, two teachers are interviewed to provide their perspectives of the aforementioned subject matter. Both parent and child in each case study are interviewed using open-ended topics to examine the motivational and emotional factors of homework practices among the three families. The researcher observes the students’ homework experiences for about 1 hour. Documents from all families are collected to gain insight into the homework experiences. These case studies combine interviews, observations, documents, and data analysis to look closely at the homework experiences of these students. Major findings include atypical math homework practices in terms of Caucasian middle class norms: The families believed that math homework was challenging and a serious business matter. Therefore, they worked twice as hard with a sense of urgency and priority at completing math homework. The mothers approached math homework with a warm, yet firm demeanor by providing external motivation through pushing their daughters, who lacked interest in math homework.

yes / Does exercise promote weight loss? One of the key problems with studies assessing the effi cacy of exercise as a method of weight management and obesity is that mean data are presented and the individual variability in response is overlooked. Recent data have highlighted the need to demonstrate and characterise the individual variability in response to exercise. Do people who exerc ise compensate for the increase in energy expenditure via compensatory increases in hunger and food intake? The authors address the physiological, psychological and behavioural factors potentially involved in the relationship between exercise and appetite, and identify the research questions that remain unanswered. A negative consequence of the phenomena of individual variability and compensatory responses has been the focus on those who lose little weight in response to exercise; this has been used unreasonably as evidence to suggest that exercise is a futile method of controlling weight and managing obesity. Most of the evidence suggests that exercise is useful for improving body composition and health. For example, when exercise-induced mean weight loss is <1.0 kg, signifi cant improvements in aerobic capacity (+6.3 ml/kg/min), systolic (¿6.00 mm Hg) and diastolic (¿3.9 mm Hg) blood pressure, waist circumference (¿3.7 cm) and positive mood still occur. However, people will vary in their responses to exercise; understanding and characterising this variability will help tailor weight loss strategies to suit individuals.

This dissertation presents applications of machine learning and statistical approaches to infer protein-DNA bindings in the presence of epigenetic modifications. Epigenetic modifications are alterations to the DNA resulting in gene expression regulation where the structure of the DNA remains unaltered. It is a heritable and reversible modification and often involves addition or deletion of certain chemical compounds to the DNA. Histone modification is an epigenetic change that involves alteration of the histone proteins – thus changing the chromatin (DNA wound around histone proteins) structure – or addition of methyl-groups to the Cytosine base adjacent to a Guanine base. Epigenetic factors often interfere in gene expression regulation by promoting or inhibiting protein-DNA bindings. Such proteins are known as transcription factors. Transcription is the first step of gene expression where a particular segment of DNA is copied into the messenger-RNA (mRNA). Transcription factors orchestrate gene activity and are crucial for normal cell function in any organism. For example, deletion/mutation of certain transcription factors such as MEF2 have been associated with neurological disorders such as autism and schizophrenia. In this dissertation, different computational pipelines are described that use mathematical models to explain how the protein-DNA bindings are mediated by histone modifications and DNA-methylation affecting different regions of the brain at different stages of development. Multi-layer Markov models, Inhomogeneous Poisson analyses are used on data from brain to show the impact of epigenetic factors on protein-DNA bindings. Such data driven approaches reinforce the importance of epigenetic factors in governing brain cell differentiation into different neuron types, regulation of memory and promotion of normal brain development at the early stages of life. / Doctor of Philosophy / A cell is the basic unit of any living organism. Cells contain nucleus that contains DNA, self replicating material often called the blueprint of life. For sustenance of life, cells must respond to changes in our environment. Gene expression regulation, a process where specific regions of the DNA (genes) are copied into messenger RNA (mRNA) molecules and then translated into proteins, determines the fate of a cell. It is known that various environmental (such as diet, stress, social interaction) and biological factors often indirectly affect gene expression regulation. In this dissertation, we use machine learning approaches to predict how certain biological factors interfere indirectly with gene expression by changing specific properties of DNA. We expect our findings will help in understanding the interplay of these factors on gene expression.

Females currently represent the largest number of teachers in the United States but yet they represent the smallest number of superintendents (Miller, 2009). While female students and educators are increasing, few of them have attained the superintendency positions within school divisions (Hopkins, 2012). This phenomenon was examined in the Commonwealth of Virginia through a mixed methods study, which provided an understanding of the career development experiences of female superintendents in public K-12 school divisions. The researcher utilized Schein's career anchor theory (1990), which examined the personal and professional values and dimensions that influence career choices. Results of the study found that attaining the superintendency among female leaders has not been primarily influenced by career anchors, but rather by their own commitment and dedication to public service. While the main barrier for females to achieve the superintendent's position was related to familial roles, they coping mechanisms of these include emulating the abilities of males or employing the nurturing qualities of females. The study recommends that school boards should design and implement policies that provide an enabling working environment for rising female leaders. Further, educational leadership organizations may explore establishing affinity groups to improve networking among education professionals with diverse genders and cultures. / Ed. D.

Although considerable literature can be found concerning the etiology of cigarette smoking, research suggests that a major gap exists pertaining to predictors of adolescent smoking for rural populations. The purpose of this study is to compare risk and protective factors for adolescents living in rural and urban environments. An ecological framework was used to examine variables from the individual, family, peer, school, and community contexts. The influence of these variables was assessed on a sample of (n=3,166) 8th, 10th, and 12th grade students from Virginia public schools. Linear regression analyses revealed that parental attitudes and best friends' smoking behavior was influential in the smoking behavior of both rural and urban adolescents. School and community level variables were only influential in smoking behavior among the urban adolescents. / Master of Science

Thesis (M.Sc.(Agric, Science and Tech) North-West University, Mafikeng Campus, 2012

International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada / A long standing problem in telemetry post processing is the application of correct calibration factors to telemetered data generated on a system which has had a history of hardware changes. These calibration problems become most exacerbated when old test data is being examined and there is uncertainty as to hardware configuration at the time of the test. In this paper a mechanism for introducing a high degree of reliability in the application of calibration factors is described in an implementation done for Brilliant Pebbles Flight Experiment Three (FE-3).

Alcohol addiction is a big public health issue and is the reason to why this study was made. Main focus of the study was a sociocultural perspective of learning. Results show that the way to handle an addiction is a lifelong learning process. To be able to recover from an alcohol addiction the addict must face a consequence that has an impact on the addict to make them want to change their ways, and is often health related or that the addict’s social environment is affected.  These consequences often contribute to an insight to the addict, that their behavior is untenable and a decision is gradually made by the addict with their social network, consisting of family and friends. To be able to maintain sober the addict is in great need of support and acceptance from their loved ones but also from society. The aim of the study was to evaluate which factors play an important role in the addict’s life when battling an addiction thru a sociocultural perspective of learning. The empirical data was collected through five interviews with people that had competence regarding addiction.

Electronic payment systems (EPS) have received considerable attention from researchers and business owners worldwide, because of their potential to support economic development and growth. Despite the significant contribution of the growth in EPS to the ability to complete transactions via the Internet, Libya lags significantly behind developed countries in its adoption of EPS. This research focuses on factors affecting EPS adoption and use in Libya, explaining how they positively or negatively affect Libyan customers and organisations‟ willingness to adopt EPS. Data was collected via semi-structured interviews with different stakeholders, including consumers, organisational staff (e.g. Telecommunications Companies, Banks, the Ministry of Telecommunication and Informatics, etc.), and strategic decision-makers (e.g. the Under-Secretary of the Ministry of Communications, Director of Islamic Banking at Bank of Republic). The research implements Grounded Theory methods (GT), in particular the Straussian approach, to analyse, explore, and investigate the socio-organisational, technical, political, and economic factors affecting the adoption of EPS in Libya, and importantly the relationship between these factors. It discusses the impact of the factors identified, from both organisational and consumer perspectives, highlighting the factors and issues that need to be overcome to support successful adoption of EPS. The findings confirm that, for consumers and organisations alike, economic factors (e.g. perceived benefits, cooperation with existing entities, mutuality of stakeholders, Internet costs, standard of living, marketing businesses, awareness, withdrawal control, XX feasibility studies on EPS implementation, Islamic banking services and competition) are the core factors influencing the system‟s adoption. Furthermore, the findings revealed three new and significant factors of relevance to Libya, including standard of living, post coding and the unstable political situation in the country. These represent a unique contribution to the body of knowledge, illustrating the attitude of the Libyan people toward Internet usage, and current obstacles to EPS adoption. The use of substantive GT, in particular the Straussian approach, for data collection and data analysis in the field of EPS adoption, and the assessment of organisational and consumer attitudes, is unique to this research to the best of the researcher‟s knowledge. Thus, the research embodies a substantial contribution to the body of knowledge. The interpretive analysis of data using a Straussian approach has permitted the researcher to attain a deep understanding of the socio-organisational, economic, political, and technical factors affecting adoption of an E-payment system in Libya, as implemented by different stakeholders: Consumers, and Organisational. The benefits that the adoption of EPS in Libya will bring, include facilitation of online transactions, the availability of more secure websites, easier payment and access to the global markets. Furthermore, detailed recommendations are also being offered to assist decision-makers in the development and introduction of EPS in Libya, i.e. including the Communications and Informatics Ministry, which is hoped will advise internet service providers and companies to discount the cost of using the internet for limited bandwidths, in order to insure everyone access to the internet, and EPS.

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