Thesis (Ph.D. (Industrial Psychology) )--North-West University, Potchefstroom Campus, 2007.

<p>The main sources of teacher stress stem from difficulty in maintaining classroom discipline, time pressures, workload demands, excessive change, being evaluated by others, challenging relationships with colleagues and poor working conditions. This study therefore highlights the significant relationship between occupational stressors and the stress experienced by teachers at high risk secondary schools in the Western Cape. Occupational stress is related to job satisfaction, job overload and job control. The coping strategies of teachers at high risk secondary schools are explored. The results indicate that there were no significant relationships between teacher stress and job satisfaction, job overload and job control at high risk secondary schools in the Western Cape. Job satisfaction however, showed an inverse, albeit not significant relationship to teacher stress. Furthermore, male and female teachers respond differently to these occupational stressors. Females were more prone to the experience of stress than males. The recommendations are based on the conclusions drawn from the study. In conclusion, occupational stress is considered a major source of stress for teachers, which needs to be addressed more vigorously at high risk secondary schools in the Western Cape.</p>

<p>The call centre industry has been one of the fastest growing industries in South Africa. Call centres have for most companies become a basic business requirement for servicing customers. Zapf, Isic, Bechtoldt and Blau (2003: 311) argue that there are high levels of stress amongst employees in call centres, which they believe to be the result of both the work tasks and the interactions with customers. The aim of this study was to establish whether call centre work design and structure contributed to role stress amongst client service representatives (CSRs). It was also the aim of this study to establish whether role stress affected the CSRs‟ levels of job satisfaction and their intentions to quit from their jobs.</p>

Purpose: The purpose of this thesis is to investigate Stena Metall’s values and how they are communicated within the organization. Background: In the Fall of 2008, the world was shocked by the worst financial crisis in decades. The crisis had deep effects on the Swedish economy, and many companies suffered heavily. The recycling and environmental service company Stena Metall experienced their first negative result in 30 years, and 900 employees had to leave the company. An action program, including an altered culture was established with the purpose to adapt the operations to the new business environmental conditions. Values, which are a part of the organizational culture, were decided to be an important part of the change. To implement these in the entire organization a well-structured communication process is needed. Within these subjects; values and communication, a qualitative study at Stena Metall has been conducted. Method: To fulfill the purpose, a qualitative method has been used. Thirteen interviews were conducted to collect data from different levels of the organization. The interviews were designed differently based on the employee’s level of responsibility in the organization. The theoretical framework used when analyzing the empirical material includes earlier research in the areas of culture, with emphasis on values, and communication. Conclusion: Two set of values have been identified, core values and aspiration values. The findings indicate a gap in the communicational process at Stena Metall. Part of the new information communicated about Stena Metall´s values is lost on its way from the management to the lower levels in the organization. The perception of what the values mean, both core and aspiration values, differs depending on level in the organization.

The endocrine heart synthesises and secretes two polypeptide hormones: the natriuretic peptides (NP) atrial natriuretic factor (ANF) and B-type natriuretic peptide (BNP). The biological actions of these hormones serve both acutely and chronically to reduce systemic blood pressure and hemodynamic load to the heart, thus contributing to the maintenance of cardiorenal homeostasis. Considerable effort has been focused on the elucidation of the mechanistic underlying ANF and BNP gene expression and secretion but much remains to be determined regarding specific molecular events involved in the cardiocyte secretory function. These hormones are produced by the atrial muscle cells (cardiocytes), which display a dual secretory/muscle phenotype. In contrast, ventricular cardiocytes display mainly a muscle phenotype. Comparatively little information is available regarding the genetic background for this important phenotypic difference with particular reference to the endocrine function of the heart. We postulated that comparison of gene expression profiles between atrial and ventricular muscles would help identify transcripts that underlie the phenotypic differences associated with the endocrine function of the heart as well as identify signaling pathways involved in its regulation. The cardiac atrial and ventricular transcriptomes were analyzed using oligonucleotide microarrays under normal or chronically induced aortocaval shunt volume-overload conditions. Transcriptional differences were validated by RT-PCR and transcripts of interest were knocked-down by RNAi. Comparison of gene expression profiles in the rat heart revealed a total of 1415 differentially expressed genes between normal atrial and ventricular tissues. Functional classification and pathway analysis identified numerous transcripts involved in mechanosensing, vesicle trafficking, hormone secretion, and G protein signaling. Volume-overloaded animals exhibited a progressive increase in cardiac mass over the four-week time course, an increase in expression of known hypertrophic genes, as well as the differential expression of 700 genes within the atria. Volume-overload specifically downregulated the accessory protein for heterotrimeric G protein signaling RASD1 in the atria. In vitro, knockdown of RASD1 in the atrial-derived HL-1 cells, significantly increased ANF secretion, demonstrating a previously unknown negative modulator role for RASD1. The data developed in this investigation provides insight into the expression profiles of genes particularly centered on the secretory function of the heart under normal and chronic hemodynamic overload conditions. Genome-wide expression profile analysis identified RASD1 as being differentially expressed between cardiac tissues as well as being modulated by chronic volume overload. RASD1 emerges as a tonic inhibitor of ANF secretion. The novel function identified herein for RASD1 in the atria is of considerable interest given the fact that secretory impairment of the cardiac natriuretic hormones can negatively impact cardiovascular homeostasis.

The endocrine heart synthesises and secretes two polypeptide hormones: the natriuretic peptides (NP) atrial natriuretic factor (ANF) and B-type natriuretic peptide (BNP). The biological actions of these hormones serve both acutely and chronically to reduce systemic blood pressure and hemodynamic load to the heart, thus contributing to the maintenance of cardiorenal homeostasis. Considerable effort has been focused on the elucidation of the mechanistic underlying ANF and BNP gene expression and secretion but much remains to be determined regarding specific molecular events involved in the cardiocyte secretory function. These hormones are produced by the atrial muscle cells (cardiocytes), which display a dual secretory/muscle phenotype. In contrast, ventricular cardiocytes display mainly a muscle phenotype. Comparatively little information is available regarding the genetic background for this important phenotypic difference with particular reference to the endocrine function of the heart. We postulated that comparison of gene expression profiles between atrial and ventricular muscles would help identify transcripts that underlie the phenotypic differences associated with the endocrine function of the heart as well as identify signaling pathways involved in its regulation. The cardiac atrial and ventricular transcriptomes were analyzed using oligonucleotide microarrays under normal or chronically induced aortocaval shunt volume-overload conditions. Transcriptional differences were validated by RT-PCR and transcripts of interest were knocked-down by RNAi. Comparison of gene expression profiles in the rat heart revealed a total of 1415 differentially expressed genes between normal atrial and ventricular tissues. Functional classification and pathway analysis identified numerous transcripts involved in mechanosensing, vesicle trafficking, hormone secretion, and G protein signaling. Volume-overloaded animals exhibited a progressive increase in cardiac mass over the four-week time course, an increase in expression of known hypertrophic genes, as well as the differential expression of 700 genes within the atria. Volume-overload specifically downregulated the accessory protein for heterotrimeric G protein signaling RASD1 in the atria. In vitro, knockdown of RASD1 in the atrial-derived HL-1 cells, significantly increased ANF secretion, demonstrating a previously unknown negative modulator role for RASD1. The data developed in this investigation provides insight into the expression profiles of genes particularly centered on the secretory function of the heart under normal and chronic hemodynamic overload conditions. Genome-wide expression profile analysis identified RASD1 as being differentially expressed between cardiac tissues as well as being modulated by chronic volume overload. RASD1 emerges as a tonic inhibitor of ANF secretion. The novel function identified herein for RASD1 in the atria is of considerable interest given the fact that secretory impairment of the cardiac natriuretic hormones can negatively impact cardiovascular homeostasis.

<p><strong>Purpose: </strong>The purpose of this thesis is to investigate Stena Metall’s values and how they are communicated within the organization.</p><p><strong>Background: </strong>In the Fall of 2008, the world was shocked by the worst financial crisis in decades. The crisis had deep effects on the Swedish economy, and many companies suffered heavily. The recycling and environmental service company Stena Metall experienced their first negative result in 30 years, and 900 employees had to leave the company. An action program, including an altered culture was established with the purpose to adapt the operations to the new business environmental conditions. Values, which are a part of the organizational culture, were decided to be an important part of the change. To implement these in the entire organization a well-structured communication process is needed. Within these subjects; values and communication, a qualitative study at Stena Metall has been conducted.</p><p><strong>Method: </strong>To fulfill the purpose, a qualitative method has been used. Thirteen interviews were conducted to collect data from different levels of the organization. The interviews were designed differently based on the employee’s level of responsibility in the organization. The theoretical framework used when analyzing the empirical material includes earlier research in the areas of culture, with emphasis on values, and communication.</p><p><strong>Conclusion: </strong>Two set of values have been identified, core values and aspiration values. The findings indicate a gap in the communicational process at Stena Metall. Part of the new information communicated about Stena Metall´s values is lost on its way from the management to the lower levels in the organization. The perception of what the values mean, both core and aspiration values, differs depending on level in the organization.</p>

No description available.

Tertiary institutions in South Africa have experienced radical changes in the past decades, especially due to the change from technikons to universities of technology. These changes created new mental and emotional demands for academic staff and placed them under additional pressure. Problems experienced by tertiary institutions include constantly changing systems, students from underprivileged backgrounds and decreased subsidies from the state. These factors could lead to role overload and role conflict. The objective of this research was to examine the relationships between individual indicators of work climate (job challenge demand, role overload and role conflict, job satisfaction and pay satisfaction and social support) and turnover intention. Further objectives included empirically determining if these indicators of work climate can be used to predict turnover intention and to determine if social support plays a moderating role in the translation of work climate in turnover intention. A cross-sectional survey design was used. A convenience sample was taken from a South African university of technology. Measuring instruments for all the variables of interest were administered. Descriptive statistics were used to analyse the data. Finally, a structural equation model was developed to explain the relations between the variables. The results obtained for the scales proved that four of the seven specific measuring instruments are reliable in terms of their specific use for employees in a South African tertiary institution. Job challenge demand, quantitative role overload and role conflict were less reliable. Results showed that when an employee feels that he/she has too much to do in too little time, or if the task is too difficult to complete, he/she will experience lower levels of job satisfaction which in turn may lead to higher levels of turnover intention. Social support from the supervisor and colleagues increase job satisfaction. A moderating effect for social support between work climate (role characteristics and satisfaction) and turnover intention was demonstrated. By way of conclusion, recommendations for future research were made. / Thesis (M.A. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2008.

<p>The main sources of teacher stress stem from difficulty in maintaining classroom discipline, time pressures, workload demands, excessive change, being evaluated by others, challenging relationships with colleagues and poor working conditions. This study therefore highlights the significant relationship between occupational stressors and the stress experienced by teachers at high risk secondary schools in the Western Cape. Occupational stress is related to job satisfaction, job overload and job control. The coping strategies of teachers at high risk secondary schools are explored. The results indicate that there were no significant relationships between teacher stress and job satisfaction, job overload and job control at high risk secondary schools in the Western Cape. Job satisfaction however, showed an inverse, albeit not significant relationship to teacher stress. Furthermore, male and female teachers respond differently to these occupational stressors. Females were more prone to the experience of stress than males. The recommendations are based on the conclusions drawn from the study. In conclusion, occupational stress is considered a major source of stress for teachers, which needs to be addressed more vigorously at high risk secondary schools in the Western Cape.</p>