Analysis of participation in 21st century community learning center after-school program and student grade five achievement

This study explored the fifth grade achievement in reading, math, and language as measured by the California Achievement Test for students who were selected because of at-risk factors into an after-school achievement and enrichment program. Students in grades one to five attended this 21st Century Learning Center Program from one to five days per week. Means of fifth grade achievement from participants in 2008-2012 were compared to the means of students within the same school setting

Flotation of nickel-copper sulphide ore : optimisation of process parameters using Taguchi method

Froth flotation is widely used for concentration of base metal sulphide minerals in complex ores. One of the major challenges faced by flotation of these ores is the ever varying grade and mineralogy. This therefore calls for a continual characterisation and optimisation of flotation parameters such that concentrator performance as a whole is always maintained. In this study, the robust Taguchi experimental design method was used to determine the optimum conditions for the flotation of nickel, copper and cobalt from a nickel-copper sulphide ore. The parameters investigated include collector dosage, percentage solids, depressant dosage and pH. The effects of these parameters at three different levels on the recovery of Ni, Cu and Co were investigated using an L9 Taguchi orthogonal array. The optimum conditions for the recovery of the base metals are collector dosage, 80g/t; pH, 10.15; %solids, 25; and depressant dosage, 100g/t. Relative significance of flotation parameters (based on difference between max and min. values) indicates that pH has the most significant effect on the recovery of nickel, copper and cobalt during flotation. Analysis of variance showed that pH and depressant dosage were the most significant parameters affecting the recovery of Ni, while collector dosage and percentage solids were insignificant. None of the tested parameters significantly affected copper recovery whilst pH was found to also significantly affect cobalt recovery

The Association between Trust in Health Care Providers and Medication Adherence among Black Women with Hypertension

Background: Black women have the highest prevalence of hypertension in the world. Reasons for this disparity are poorly understood. The historical legacy of medical maltreatment of Blacks in the U.S. provides some insight into distrust in the medical profession, refusal of treatment, and poor adherence to treatment regimens. Methods: Black women (N = 80) who were prescribed antihypertensive medications were recruited from urban communities in North Carolina. Study participants completed the Trust in Physician and Hill-Bone Compliance to High Blood Pressure Therapy questionnaires. An exact discrete-event model was used to examine the relationship between trust and medication adherence. Results: Mean age of study participants was 48 ± 9.2 years. The majority of participants (67%) were actively employed and 30% had incomes at or below the federal poverty level. Increasing levels of trust in the health care provider was independently associated with greater medication adherence (PTrend = 0.015). Conclusion: Black women with hypertension who trusted their health care providers were more likely to be adherent with their prescribed antihypertensive medications than those who did not trust their health care providers. Findings suggest that trusting relationships between Black women and health care providers are important to decreasing disparate rates of hypertension

A multicenter retrospective study of patients treated in the thalamus with responsive neurostimulation

INTRODUCTION: For drug resistant epilepsy patients who are either not candidates for resective surgery or have already failed resective surgery, neuromodulation is a promising option. Neuromodulatory approaches include responsive neurostimulation (RNS), deep brain stimulation (DBS), and vagal nerve stimulation (VNS). Thalamocortical circuits are involved in both generalized and focal onset seizures. This paper explores the use of RNS in the centromedian nucleus of the thalamus (CMN) and in the anterior thalamic nucleus (ANT) of patients with drug resistant epilepsy. METHODS: This is a retrospective multicenter study from seven different epilepsy centers in the United States. Patients that had unilateral or bilateral thalamic RNS leads implanted in the CMN or ANT for at least 6 months were included. Primary objectives were to describe the implant location and determine changes in the frequency of disabling seizures at 6 months, 1 year, 2 years, and \u3e 2 years. Secondary objectives included documenting seizure free periods, anti-seizure medication regimen changes, stimulation side effects, and serious adverse events. In addition, the global clinical impression scale was completed. RESULTS: Twelve patients had at least one lead placed in the CMN, and 13 had at least one lead placed in the ANT. The median baseline seizure frequency was 15 per month. Overall, the median seizure reduction was 33% at 6 months, 55% at 1 year, 65% at 2 years, and 74% at \u3e2 years. Seizure free intervals of at least 3 months occurred in nine patients. Most patients (60%, 15/25) did not have a change in anti-seizure medications post RNS placement. Two serious adverse events were recorded, one related to RNS implantation. Lastly, overall functioning seemed to improve with 88% showing improvement on the global clinical impression scale. DISCUSSION: Meaningful seizure reduction was observed in patients who suffer from drug resistant epilepsy with unilateral or bilateral RNS in either the ANT or CMN of the thalamus. Most patients remained on their pre-operative anti-seizure medication regimen. The device was well tolerated with few side effects. There were rare serious adverse events. Most patients showed an improvement in global clinical impression scores

Baroco

Documents submitted to the Faculty of the University of North Carolina at Chapel Hill in partial fulfillment of the requirements for the degree of Master of Fine Arts in the Department of Art.Master of Fine Art

Parallel-Sparse Symmetrical/Unsymmetrical Finite Element Domain Decomposition Solver with Multi-Point Constraints for Structural/Acoustic Analysis

Details of parallel-sparse Domain Decomposition (DD) with multi-point constraints (MPC) formulation are explained. Major computational components of the DD formulation are identified. Critical roles of parallel (direct) sparse and iterative solvers with MPC are discussed within the framework of DD formulation. Both symmetrical and unsymmetrical system of simultaneous linear equations (SLE) can be handled by the developed DD formulation. For symmetrical SLE, option for imposing MPC equations is also provided. Large-scale (up to 25 million unknowns involving complex numbers) structural and acoustic Finite Element (FE) analysis are used to evaluate the parallel computational performance of the proposed DD implementation using different parallel computer platforms. Numerical examples show that the authors\u27 MPI/FORTRAN code is significantly faster than the commercial parallel sparse solver. Furthermore, the developed software can also conveniently and efficiently solve large SLE with MPCs, a feature not available in almost all commercial parallel sparse solvers

Effects of knowledge management on innovation capabilities amongst small and medium enterprises in South Africa: The case of Buffalo City Metropolitan Municipality

Background: South Africa is witnessing a growth in small and medium enterprises (SMEs). Given this rise in SMEs, there is a need to pay attention to those factors that influence how these enterprises perform. Aim: The purpose of the study was to investigate the effects of knowledge management (KM) on innovation capabilities (IC) in SMEs with a special focus on Buffalo City Metropolitan Municipality. Setting: This study is the first to investigate the effects of KM on IC in SMEs operating in South Africa. Given the scarcity of studies on KM in SMEs in the sub-Saharan region, this study contributes to the literature on the effects of KM on IC. Method: A quantitative research approach was followed in carrying out this study. Descriptive and inferential statistics were performed to answer the research questions and test the hypotheses of the study. The respondents (n = 280) were SME representatives operating in the Buffalo City Metropolitan Municipality. Results: Knowledge management is found to exert a positive effect on SMEs’ IC. Conclusion: Findings from the study can assist various practitioners, directly or indirectly involved with development of business, to develop strategies that improve SMEs’ growth and sustainability. These practitioners include strategic management researchers, policymakers, SME owners and managers and lecturers

Can you teach an old dog new tricks? An exploratory study into how a sample of lecturers develop digital literacies as part of their career development

The concept of digital and information communication technology (ICT) literacy is receiving renewed empirical attention. This focus is attributed to the changing nature of society and the move towards the ideals of the knowledge-based economy. Further, universities in South Africa and internationally are encouraging the fusion of technology in how students read and write. This research gives focus to the lecturer, particularly those lecturers who were once resistant to the use of technology as part of teaching instruction. The aim here was to track how these lecturers over a one-year period develop digital and ICT literacies to assist their career development. The study adopted an interpretivist philosophy, relying on the qualitative research approach and a series of three interviews over a year period with 20 lecturers at a selected South African university. Data were analysed using thematic analysis to generate three central themes. Firstly, the source of resistance in using technology as part of teaching and learning emanated from two main subthemes as perceptions: (1) technology viewed as a fad with little or no impact on actual learning and (2) challenges concerning institutional technology support as a limitation in integrating technology into teaching and learning. Secondly, the change of attitude (rather reluctantly) in using technology as part of teaching and learning was because of factors such as peers, the technology ‘tech-savvy’ student community and also a consideration for future career prospects as digital and ICT literacies are becoming a critical skills acumen for career progression. Finally, in developing digital and ICT literacies, the lecturers relied on: (1) participation in training programmes that encourage digital scholarship, (2) personal investment of time and effort to learn about how to develop digital and ICT literacies and lastly, (3) developing a career and identity management strategy that incorporates digital and ICT literacies. Implications for teaching and learning practice are made based on these findings. Further, the impact on individual career development (as far as lecturers are concerned) is also suggested

Impact of demographic variables on emotional intelligence levels amongst a sample of early career academics at a South African higher education institution

Orientation: Emotional intelligence (EI) is highlighted by the literature as an important attribute that enables an individual to cope with changes and pressures in the work environment and subsequently yields consistent performance. However, some scholars debate the role of demographic diversities and their impact on levels of EI amongst individuals. Research purpose: This study examined the influence of demographic variables on EI levels amongst early career academics (ECAs). Motivation for the study: The study interrogates demographic variables and EI, two issues important in the 21st-century workforce setting. The relationship between the two may be of value to the debate surrounding the success of early career professionals in the higher education sector. The success of ECAs should be of importance to institutions of higher learning. Research approach/design and method: A quantitative approach was followed in conducting the study. Data were collected from a sample of 220 ECAs in a selected university in South Africa. A self-administered questionnaire was sent to the participants using SurveyMonkey online data collection tool. EI was measured using the Schutte Emotional Intelligence Scale. Main findings: Significant EI level differences were observed based on the participants’ ethnic background. However, no significant differences in EI levels could be found based on the respondents’ gender, age and work experience. Practical/managerial implications: The findings may be relevant to career management and human resources forecasting. Contribution/value-add: The study adds to the literature on EI and career success of early career professionals