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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.
621

Associations between biological alcohol consumption markers, reported alcohol intakes, and biological health outcomes in an African population in transition / Pedro T. Pisa

Pisa, Pedro Terrence January 2008 (has links)
Thesis (Ph.D. (Nutrition))--North-West University, Potchefstroom Campus, 2009.
622

Competencies needed for virtual workers / by Theresa A. Botha

Botha, Theresa Adrian January 2005 (has links)
The changing world of work that we live in is characterised by forming part of globalisation and virtualness. The previous era managers focused on how to make money and how this money can work for them. The changing world of work is characterised by global competitiveness in delivering quality products quicker and cheaper. Globalisation presents continuous advancements in technology, which requires a new mindset. These technological advancements have a profound effect on culture, training and management of staff. This brings about change in flexible working arrangements and the traditional office made space within certain organisations for virtual offices. The move towards virtualness causes companies to work more closely with their customers to be able to coordinate rapid changes in products (Schuh, Millarg & Gorannson, 1998; Weissenfeld, Fisscher, Pearson & Brockhoff, 200 1). The financial institution referred to in this study was also driven by globalisation and technological advancements to re-engineer the current way in which they do business. It became evidently clear that there was a need for a shift towards virtualness, which called for the identifying of relevant competencies; needed by employees for working in a virtual environment. These competencies will enable the organisation to select the right employees and provide them with information that could be utilised in training the current virtual employees according to the competencies identified. The objectives of this research were firstly to conduct a job analysis to determine the important competencies needed by virtual workers, in a specific job at a financial institution in South Africa. Secondly to compare the current competencies of the virtual workers (who took part in the research) with the competencies identified by the job analysis to be important for this specific job. Thirdly to determine the skills required for virtual workers and compare these skills with the skills ranked by the current virtual workers to be important. Fourthly to identify how these virtual workers experienced the effect of virtualness on their performance. Lastly to make recommendations regarding future training and selection purposes. A survey design (cross-sectional) was used to determine competencies needed by virtual workers for a specific job at a financial institution in South Africa. The study population consisted of (N= 71) employees in a virtual job at a financial institution in South Africa. The Work Profile Systems (WPS), Occupational Personality Questionnaire (OPQ), Performance Assessment Questionnaire (PAQ) and a Skills Audit (SA) were administered. Results of the research indicated that 44% of the study population exhibits the competencies needed by virtual workers as indicated by the Inventory of Management Competencies (IMC) Profile of the WPS. The results of the Performance Assessment Questionnaire (PAQ) indicated that the current virtual workers experienced the greatest impact of virtualness on improving the attainment of personal goals, as well as improving the achievement of organisational goals. The results from the Skills Audit (SA) identified skills that were essential for virtual workers in a specific job within a virtual environment, according to the feedback received from the current virtual workers. They compared favourably with the skills identified by literature as being important. Recommendations to the organisation and for future research have been made and limitations were also discussed. / Thesis (M.A. (Industrial Psychology))--North-West University, Vaal Triangle Campus, 2005.
623

Associations between biological alcohol consumption markers, reported alcohol intakes, and biological health outcomes in an African population in transition / Pedro T. Pisa

Pisa, Pedro Terrence January 2008 (has links)
Thesis (Ph.D. (Nutrition))--North-West University, Potchefstroom Campus, 2009.
624

Die Analyse und Bewertung vager linguistischer Terme mittels fuzzy Methodik

Bocklisch, Franziska 02 February 2012 (has links) (PDF)
In vielen Lebenssituationen müssen Menschen auf der Grundlage von vagen Informationen Zustände analysieren, bewerten, vorhersagen und entscheiden. Vagheit ist ein zentrales Charakteristikum der menschlichen Sprache, da viele Worte keine ganz klaren Abgrenzungen haben sondern fließend ineinander übergehen. Wie alt ist z.B. ein junger Mann? Und wo liegt die Altersgrenze, die junge von alten Männern trennt? Die meisten Menschen werden auf diese Frage übereinstimmend antworten, dass man die Altersgrenze nicht präzise festlegen kann und dass jung und alt Konzepte sind, die beispielsweise vom Standpunkt oder Kontext abhängig sind und graduell ineinander übergehen. Der graduelle Übergang verhindert eine klare Unterscheidung der unscharfen Aussagen (junge versus alte Männer) und stellt Menschen vor die Aufgabe, mit dieser Ungenauigkeit umzugehen. Die vorliegende Arbeit beschäftigt sich mit der Vagheit sprachlicher Ausdrücke (linguistische Terme) und hat zum Ziel, eine konsistente fuzzy Methodik zur Erfassung der Begriffsbedeutungen zu entwickeln, sie empirisch zu überprüfen und die Ergebnisse auf praktische Fragestellungen (z.B. die Nutzung in verbalen Fragebogenskalen) anzuwenden. Hierbei werden die linguistischen Terme als unscharfe Mengen (fuzzy sets) konzeptualisiert und mathematisch mit fuzzy Zugehörigkeitsfunktionen beschrieben. Die Formalisierung der Terme ermöglicht eine Objektivierung und bildet die Grundlage für die Nutzung in computerbasierten Systemen (z.B. Decision Support Systemen). Folgende zentrale Punkte sind Gegenstand der Arbeit: (1) Die Vorstellung eines zweistufigen Verfahrens zur Übersetzung von linguistischen Termen in formalisierte Beschreibungen (fuzzy Zugehörigkeitsfunktionen) und dessen empirische Erprobung anhand von Wahrscheinlichkeits- und Häufigkeitsausdrücken: Die in der ersten Stufe des Verfahrens erfassten numerischen Schätzwerte für die Begriffe werden in der zweiten Stufe mit fuzzy Zugehörigkeitsfunktionen des Potentialtyps modelliert. In zwei Studien konnte gezeigt werden, dass diese Funktionen ein geeignetes Mittel zur Beschreibung der Terme sind und sich durch die Nutzung der fuzzy Methodik neue Möglichkeiten zu einer systematischen Erforschung linguistischer Terme ergeben. (2) Der Transfer der durch die fuzzy Übersetzungsprozedur gewonnenen Grundlagenergebnisse in anwendungsorientierte psychologische Forschungsbereiche: Die vorgeschlagenen Methodik wird zur Auswahl und Evaluation von sprachlichen Begriffen für Fragebogenskalen mit verbalen Antwortkategorien genutzt. Anhand der verbalen Antwortskala eines Beispielfragebogens (COPSOQ) konnte in zwei Studien gezeigt werden, dass die Abstände zwischen den Antwortkategorien der originalen Skala nicht gleich sind. Die fehlende Äquidistanz führt dazu, dass die Voraussetzung für eine parametrisch-statistische Auswertung der Daten nicht gegeben ist und beispielsweise keine Mittelwerte berechnet werden dürften. Es zeigte sich ebenso, dass die erarbeitete fuzzy Methodik die Auswahl besser geeigneter äquidistanter Terme ermöglicht. (3) Die Vorstellung und Nutzung der fuzzy Methodik für die Auswertung von unscharfen Daten, die aus den Antworten verbaler Fragebogenskalen stammen: Hierbei werden die fuzzy Auswertungsergebnisse mit den Ergebnissen der herkömmlichen statistischen Auswertungsprozedur verglichen. In einer Studie, in der ein Fragebogen zur Messung von chronischem Stress (TICS) exemplarisch untersucht wurde, konnte gezeigt werden, dass die fehlende Äquidistanz der Antwortkategorien zu einer Verzerrung der statistischen Ergebnisauswertung und damit auch zur Fehlinterpretation der Stressergebnisse führt. Die vorgestellte fuzzy Methodik hingegen beweist sich als inhaltlich konsistente Alternative. Abschließend werden in der vorliegenden Arbeit die Ergebnisse der Studien zusammenfassend diskutiert, und es erfolgt ein Ausblick auf weitere Forschungs- und Anwendungsmöglichkeiten der fuzzy Methodik.
625

Identification of early cardiac decompensation and the management of intraaortic balloon counterpulsation weaning

Lewis, Peter Andrew January 2007 (has links)
Intraaortic balloon counterpulsation (IABP) is the most widely used mechanical support in the assistance of a failing heart.1 Despite extensive research in this field no experimental or clinical studies have been undertaken to evaluate the most effective manner to wean IABP.2 The research reported in this thesis examines early recognition of cardiac decompensation and the management of IABP weaning. Conducted in three phases, the aim of this research programme was to determine the best manner by which to wean IABP. Phase 1 utilised a comparative descriptive design to examine IABP practice at a single cardiothoracic tertiary referral hospital. The majority of data collection was prospective, however, the required sample size saw inclusion of some retrospective data. This single centre data were than compared with an international registry to contrast IABP management and outcome. Phase 2 utilised a questionnaire survey to audit all Australasian intensive care units. Survey results were combined and statistically analysed to describe Australasian IABP management, weaning and outcome. Phase 3 utilised a quasi-experimental, one-group, posttest-only design to clinically validate a tool designed to monitor a patient's cardiac function - the 'cardiac decompensation tool'. Phase 1 saw data collected for 669 IABP insertions over an 11 year period at a single Australian hospital. This cohort was compared against the 38,606 patient dataset of The Benchmark Counterpulsation Outcomes Registry. Australian IABP practice saw later application of the device in a higher acuity patient. Australian practice demonstrated a prejudice toward intraoperative use (34.2% versus 16.6%; p=< 0.0001) and an aversion to catheter laboratory support (10.6% versus 19%; p=< 0.0001). Australian mortality while slightly higher, remained comparable (22% versus 20.8%; p=ns). Phase 2 response rate was 60%. The most common Australasian method of IABP support withdrawal was ratio reduction only (61%). Units with a documented weaning policy were less likely to require balloon reinsertion or pharmacologic escalation following IABP removal (p=0.06). Indicators most likely to demonstrate a patient's readiness for IABP weaning were blood pressure (92%), heart rate (76%) and wedge pressure (59%). Phase 3 revealed cardiac decompensation tool scores to increase immediately prior to a treatment escalation (p=0.022) and decrease immediately following this escalation in therapy (p=0.0096). There was also some indication of decreasing scores prior to treatment minimisation (p=0.005). Tool scores demonstrated a corresponding treatment fluctuation up to three hours prior to the treatment intervention. With Phase 1 and 2 revealing many aspects of IABP practice to vary, the need for some direction regarding weaning is evident. Timely recognition of cardiac decompensation during IABP weaning allows an opportunity for the earlier escalation of treatment and consequent provision of increased cardiac support. Application of the Phase 3 cardiac decompensation tool can only assist in ensuring the best manner by which to support IABP weaning.
626

Efficiency and safety in self-employed family forestry /

Lindroos, Ola, January 2006 (has links) (PDF)
Diss. (sammanfattning) Umeå : Sveriges lantbruksuniversitet, 2007. / Härtill 4 uppsatser.
627

Trauma, posttraumatic stress and dissociation among Swedish adolescents : evaluation of questionnaires /

Nilsson, Doris, January 2007 (has links)
Diss. (sammanfattning) Linköping : Linköpings universitet, 2007. / Härtill 4 uppsatser.
628

Quality of life in adult patients with growth hormone deficiency : bridging the gap between clinical evaluation and health economic assessment /

Kołtowska-Häggström, Maria, January 2007 (has links)
Diss. (sammanfattning) Uppsala : Uppsala universitet, 2008. / Härtill 4 uppsatser.
629

Influenza vaccination and peoples' knowledge and attitudes towards it : factors that influenced influenza vaccination during the 2004--2005 influenza vaccine shortage.

Alfred, Anushayanthan. Chappell, Cynthia L. Baraniuk, Sarah. Madjid, Mohammad. January 2007 (has links)
Thesis (M.P.H.)--University of Texas Health Science Center at Houston, School of Public Health, 2007. / Source: Masters Abstracts International, Volume: 46-01, page: 0339. Adviser: Cynthia L. Chappell. Includes bibliographical references.
630

Surveying for sexuality in cyberspace sexual orientation and stage of change for cervical cancer screening /

McGonigle, T. Hope, January 2003 (has links)
Thesis (Ph. D.)--Ohio State University, 2003. / Title from PDF t.p. (viewed on May 7, 2006). Includes bibliographical references (p. 297-304).

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