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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
431

The influence of auditory, visual and audiovisual modalities in the interpretation of cough reflex

How, Hui Teng January 2012 (has links)
Cough reflex testing (CRT) is used to assess the sensory and motor components of a reflexive cough. When used as an adjunct to the clinical swallowing evaluation, it has the potential to identify individuals who are more likely to aspirate silently in the event of aspiration. It is unknown how reliable clinicians are at interpreting cough responses and the factors that influence this reliability. Therefore, this study ascertained the reliability of Speech Language Therapists in interpreting cough responses in CRT and determined how sensory perception and training influence reliability. Additionally, the study determined a relative measure of CRT interpretation validity through a comparison with ‘expert’ consensus ratings. A total of 111 clinicians completed an online survey consisting of ratings of 30 audio-, visual- and audiovisual clips over three sessions, and a final questionnaire. Reliability was substantial (κ=.76) in rating for presence of cough but only fair (κ=.25) in rating for strength of cough. Clinicians used a variety of auditory and visual cues to assist in decision making. Training did not result in higher reliability. Ratings of individual clinicians were significantly associated with consensus ratings for presence of cough (p < 0.001) and strength of cough (p < 0.05). In summary, clinicians could reliably and accurately judge presence of cough response, but were poorer at rating the strength of cough.
432

Reliability considerations for airborne microcomputers

Depledge, P. G. January 1977 (has links)
No description available.
433

A methodology for operational reliability programme development and assessment with application to ship propulsion plant

Odoom, Emmanuel Ricky January 2000 (has links)
No description available.
434

Relevant condition parameter based approach to reliability and maintenance

Saranga, Haritha January 2000 (has links)
No description available.
435

Quality assurance in sequences of batches with varying quality

Osanaiye, P. A. January 1984 (has links)
No description available.
436

The predictive validity of a selection battery for university bridging students in a public sector organisation / Philippus Petrus Hermanus Alberts

Alberts, Philippus Petrus Hermanus January 2007 (has links)
South Africa has faced tremendous changes over the past decade, which has had a huge impact on the working environment. Organisations are compelled to address the societal disparities between various cultural groups. However, previously disadvantaged groups have had to face inequalities of the education system in the past, such as a lack of qualified teachers (especially in the natural sciences), and poor educational books and facilities. This has often resulted in poor grade 12 results. Social responsibility and social investment programmes are an attempt to rectify these inequalities. The objective of this research was to investigate the validity of the current selection battery of the Youth Foundation Training Programme (YFTP) in terms of academic performance of the students on the bridging programme. A correlational design was used in this research in order to investigate predictive validity whereby data on the assessment procedure was collected at about the time applicants were hired. The scores obtained from the Advanced Progressive Matrices (APM), which forms part of the Raven's Progressive Matrices as well as the indices of the Potential Index Battery (PIB) tests, acted as the independent variables, while the Matric results of the participants served as the criterion measure ofthe dependent variable. The data was analysed using the Statistical Package for Social Sciences (SPSS) software programme by means of correlations and regression analyses. The results showed that although the current selection battery used for the bridging students does indeed have some value, it only appears to be a poor predictor of the Matric results. Individually, the SpEEx tests used in the battery evidently were not good predictors of the Matric results, while the respective beta weights of the individual instruments did confirm that the APM was the strongest predictor. Limitations were identified and recommendations for further research were discussed. / Thesis (M.A. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2007.
437

Burnout in a customer services environment / C. Campbell

Campbell, Charlene January 2003 (has links)
The recent worldwide shift in focus from goods production to service provision in Western countries has resulted in the expansion of the service sector. The front-line worker has become a central figure in the new workplace, forming an important link between the company and the customer. The nature of the interaction between customer service staff and clients influences the perceived quality of service rendered by the company. Call centre work requires a high degree of personal contact with the public and the performance of emotional labour. Previous research found emotional labour to be a significant predictor of burnout. Given the above scenario, the lack of empirical research that systematically investigates burnout in a customer services environment in South Africa is a source of concern. The objectives of this study were to determine the construct validity and internal consistency of the Maslach Burnout Inventory - General Survey (MBI-GS) (Schaufeli, Leiter, Maslach & Jackson, 1996) in a customer services environment, and to compare the relationship of burnout with various demographic characteristics. A cross-sectional survey design was used. The study population consisted of an accidental sample of customer services personnel (N = 228). The Maslach Burnout Inventory - General Survey (MBI-GS) was used to determine the level of burnout in the participants. A biographical questionnaire was used to gather additional information. Structural equation modelling (SEM) methods as implemented by AMOS were used to test the factorial model for the MBI-GS. Cronbach alpha coefficients and inter-item correlation coefficients were used to assess the internal consistency and construct validity of the MBI-GS. Descriptive statistics were used to analyse the data. T-tests and one-way analysis of variance (ANOVA) were used to determine differences between the sub-groups in the sample. Tukey tests were done to indicate which groups differed significantly when ANOVAS were done. The results confirmed a three-factor model of burnout, consisting of Exhaustion, Cynicism and Professional Efficacy. All three factors showed acceptable internal consistencies. The results also showed that customer service staff who measured high on exhaustion and cynicism (compared with those who measured low) experienced less job satisfaction. / Thesis (M.A. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2004.
438

The validation of an organisational climate questionnaire in a corporate pharmacy group / Andries Johannes Combrink

Combrink, Andries Johannes January 2004 (has links)
The creation of a healthy, motivating organisational climate should be the aim of management. Organisational climate refers to a complex set of forces within an organisation, which have a direct influence on those who work in it. Studying organisational climate is imperative to understanding how organisations function at their core. However, a validated instrument is needed to detect the climate in an organisation. The objective of this study was to validate an organisational climate questionnaire in a corporate pharmacy group. A cross sectional survey design was used. Interviews were conducted with employees and an organisational climate questionnaire was constructed. The Organisational Climate Questionnaire (OCC) was completed by a sample of employees in a corporate pharmacy group (N = 159). Descriptive statistics (e.g. means, standard deviations, skewness and kurtosis) inferential statistics were used to analyse the results. Factors extracted include recognition and feedback, management, work relationships, task characteristics, responsibility, work pressure and decision-making. The internal consistencies of two factors were unacceptable. One-way analysis of variance of organisational climate in different regions showed practically significant differences between North West and Mpumalanga regarding how they currently view management, as well as practically significant differences between North West and both Free State and Gauteng concerning Management. The average responses of the white employees and employees of colour in this study seem to be the same, except regarding recognition and feedback. The average responses of the employees from the two gender groups seem to be the same, except regarding responsibility and work pressure. Recommendations for future research were made. / Thesis (M.A. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2005.
439

Work-related well-being of registered nurses in South Africa / Jacoba Johanna van der Colff

Van der Colff, Jacoba Johanna January 2005 (has links)
The nursing profession in South Africa currently faces a climate of uncertainty and change as governments struggle to contain healthcare while improving access, equity and health outcomes. These factors are placing an extra burden on people in a profession that is already encapsulated by an above-average risk environment for burnout and occupational stress. This research emerges from the need to enhance the work wellness of employees in an already burdened profession. Enhancement of work wellness depends on the successful diagnosis of burnout, work engagement and occupational stress. To be able to measure these constructs, it is important to use reliable and valid instruments, taking into account the cultural diversity in a multicultural setting such as South Africa. No validated instruments in this regard exist for the nursing profession in South Africa. Furthermore, little information is available regarding these constructs and the relationship between them, including sense of coherence and coping strategies. The general aim of this study was to validate the Maslach Burnout Inventory (MBI), the Utrecht Work Engagement Scale (UWES) and the Nursing Stress Indicator (NSI) for the nursing profession in South Africa; to analyse the differences between the levels of burnout and engagement of different biographical groups; to identify the major occupational stressors and to investigate the relationships between occupational stress, sense of coherence, coping, burnout and work engagement. A cross-sectional survey design was used, with stratified random samples (N = 818) taken of registered nurses in South Africa. The Maslach Burnout Inventory-Human Services Survey. the Utrecht Work Engagement Scale, the Nursing Stress Indicator, the Orientation to Life Questionnaire, the Coping Orientation for Problem Experienced Questionnaire, as well as a biographical questionnaire, was administered for the purpose of data collection. Cronbach alpha coefficients, exploratory factor analysis, Pearson product-moment correlations, multivariate analysis of variance (MANOVA), one-way analysis of variance (ANOVA), t-tests, descriptive statistics and multiple regression analysis were employed to analyse the data. Exploratory factor analysis with target rotations resulted in a three-factor model of burnout, consisting of exhaustion, depersonalisation and personal accomplishment, and a one-factor model of work engagement. The scales showed acceptable construct equivalence and internal consistencies for all three language groups, except for one item in the engagement scale, where a significant lower score was noticed for the African language speaking group. Practically significant differences were found in the burnout and engagement levels of registered nurses with regard to their age and rank, and in the case of work engagement, also regarding the years spent in nursing. T-tests revealed that burnout and engagement levels were influenced by the occurrence of a medical condition and a lack of specialised training, and in the case of burnout, also by longer working hours (full-time employment). Registered nurses reported significantly high levels of stress relating to staff shortage, inadequate salaries and excessive administrative duties. Lack of organisational support and job demands were the strongest predictors of burnout (emotional exhaustion and depersonalisation), together with a weak sense of coherence. Focus on and ventilation of emotions as a coping strategy was also related to emotional exhaustion. Low levels of burnout were found to be related to high levels of engagement. Multiple regression analysis revealed that occupational stress, a weak sense of coherence, approach coping, focus on and ventilation of emotions, and low seeking of emotional/social support predicted 33% of the variance in emotional exhaustion. Twenty-seven percent of the variance in depersonalisation was predicted by occupational stress, a weak sense of coherence, avoidance coping, focus on and ventilation of emotions, and a low turning to religion. Occupational stress because of job demands, a weak sense of coherence, approach coping strategies, focus on and ventilation of emotion, in the absence of avoidance as a coping strategy, predicted 17% of the variance in personal accomplishment, while low levels of occupational stress because of job demands, a weak sense of coherence, and approach coping strategies predicted 24% of the variance in engagement. Recommendations for future research were made. / Thesis (Ph.D. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2006.
440

A psychometric evaluation of the Job Demands-Resources Scale in South Africa / Madelyn Strydom

Strydom, Madelyn January 2005 (has links)
Although different occupations/organisations have unique work characteristics, it seems possible to divide them into two categories, namely job demands and job resources. A valid, equivalent and reliable instrument is needed to measure job demands and resources and to compare them among different occupations/organisations. The aim of this study was to investigate the construct equivalence, validity and reliability of a measuring instrument of job demands and resources and to assess the differences between the job demands and job resources in various occupations/organisations in South Africa. A cross-sectional survey design was used. A stratified random sample (N = 2717) was taken from a population consisting of employees in various occupations and organisations. The occupations/organisations included academics (higher education institutions), staff at a university of technology, correctional officers. insurance staff and engineers. The Job Demands-Resources Scale (JDRS) was used to assess job demands and job resources in the different occupations/organisations. Descriptive statistics, exploratory factor analysis, reliability analysis and multivariate analysis of variance were used to analyse the data. Five reliable factors were extracted using principal component analysis, namely: overload, growth opportunities, organisational support, advancement and job insecurity. The results showed that the structure of job demands and job resources in the different occupations/organisations were equivalent. with the exception of one factor, namely organisational support. Engineers showed higher scores on overload and growth opportunities than Occupations/organisations. Academics in higher education institutions also experienced more growth opportunities than other groups. Engineers, academics in higher education institutions and employees in the insurance industry reported higher levels of organisational support than correctional officers and employees at a university of technology. Engineers obtained the highest score on advancement, while academics in higher education institutions obtained the lowest scores. Job insecurity was the highest for correctional officers and employees of a university of technology, and the lowest for engineers. Recommendations for future research were made. / Thesis (M.A. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2006.

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