Complex adaptive systems are usually difficult to design and control. There are several particular methods for coping with complexity, but there is no general approach to build complex adaptive systems. The challenges of designing complex adaptive systems in a highly dynamic world drive the need for anticipatory capacity within engineering organizations, with a goal of enabling the design of systems that can cope with an unpredictable environment. This thesis explores this question of enhancing anticipatory capacity through the study of a complex adaptive system design methodology and complexity management competencies. A general introduction to challenges and issues in complex adaptive systems design is given, since a good understanding of the industrial context is considered necessary in order to avoid oversimplification of the problem, neglecting certain important factors and being unaware of important influences and relationships. In addition, a general introduction to complex thinking is given, since designing complex adaptive systems requires a non-classical thought, while practical notions of complexity theory and design are put forward. Building on these, the research proposes a Complex Systems Life-Cycle Understanding and Design (CXLUD) methodology to aid system architects and engineers in the design and control of complex adaptive systems. Starting from a creative anticipation construct - a loosening mechanism to allow for more options to be considered, the methodology proposes a conceptual framework and a series of stages to follow to find proper mechanisms that will promote elements to desired solutions by actively interacting among themselves. To illustrate the methodology, a financial systemic risks infrastructure systems architecture development case study is presented. The final part of this thesis develops a conceptual model to analyse managerial complexity competency model from a qualitative phenomenological study perspective. The model developed in this research is called Understanding-Perception-Action (UPA) managerial complexity competency model. The results of this competency model can be used to help ease project manager’s transition into complex adaptive projects, as well as serve as a foundation to launch qualitative and quantitative research into this area of project complexity management.

Résumé : L’informatique diffuse est le passage du paradigme informatique vers l’informatique partout. L’émergence couvre principalement l’informatique mobile et distribuée, les réseaux de capteurs, l’interaction homme-machine et l’intelligence artificielle sous l’égide de l’informatique diffuse. Des efforts considérables ont été mis sur les recherches dans ce domaine, mais il n’existe pas de normes ou des méthodologies communément acceptées pour évaluer ces systèmes et de définir des nouvelles orientations de recherche dans le futur. Cette thèse s’attaque au problème d’évaluation des systèmes informatiques ubiquitaires. La question de recherche notamment le quoi et comment évaluer n’a pas encore été résolue. Dans l’objectif de trouver une réponse à cette question et d’élaborer un cadre général d’évaluation, nous avons procédé comme suit. Pour répondre à la première partie de la question, “Quoi évaluer”, nous avons tout d’abord classè les systèmes en se basant sur certains critères, et nous avons défini ensuite les principaux paramètres pour évaluer ces systèmes. Pour ce faire, nous avons étudié différents aspects de l’informatique diffuse et nous les avons classés en onze différents aspects d’évaluation. Pour chaque aspect, nous avons identifiè les principaux paramètres qui peuvent être caractérisés et mesurés. Cette taxonomie n’est pas assez exhaustive, mais elle reflète le schéma de classification le mieux adaptè pour des évaluations effectives. Cependant, pour que l’évaluation soit la plus complète possible, nous avons jugé nécessaire d’incorporer l’utilisateur dans le processus d’évaluation. À cet effet, nous avons proposè un modèle d’évaluation qui prend en compte les besoins de l’utilisateur, le contexte dans lequel la technologie sera utilisée, et l’environnement d’exploitation dans lequel le système va être déployé. Le modèle proposè constitue une première étape vers le développement des directives et standards d’évaluation qui peuvent être utilisés peuvent être utilisées pendant les évaluations formatives et sommatives. Une autre question complémentaire à l’évaluation des performances est la validation fonctionnelle d’un système en cours d’exécution, qui confirme que le système est conforme aux exigences fonctionnelles et ne contient pas de failles. Pour répondre à la deuxième partie de la question à savoir “comment évaluer”, nous avons adoptè les techniques formelles de vérification et de validation. Comme le champ d’application du projet est très large, nous sommes concentrés sur l’évaluation au premier stade de la conception afin de vérifier et de valider l’exactitude fonctionnelle de la conception de systèmes. Pour la preuve de concept, nous avons appliqué deux méthodes, dans la première méthode, nous avons étudié les approches de vérification automatique et nous avons choisi la technique la plus connue qu’est le “model checking” pour vérifier les exigences fonctionnelles d’un système de gestion des médicaments basé sur le contexte pour des personnes âgées dans une maison Intelligente. Cette approche est complémentaire aux tests et à l’évaluation et permet aux concepteurs de vérifier le comportement de leurs systèmes par rapport aux exigences fonctionnelles avant le développement du prototype de système. Certaines propriétés de base, telles que la disponibilité ou la vivacité, l’interblocage, la comparaison des spécifications et implémentations et l’analyse d’accessibilité, sont également vérifiées à ce stade. Dans la deuxième méthode, nous avons étudié les approches de vérification d’exécution et nous avons adoptè la technique de conception par le contrat pour modéliser et vérifier la sémantique et exigences de l’interopérabilité des services dans les environnements intelligents. L’avantage de cette approche réside dans la vérification automatique en temps réel de l’interopérabilité des services dans les environnements intelligents. // Abstract : Summary performance evaluations. The proposed model is a step towards forming standard evaluation guidelines that can be used during formative and summative evaluations. A complementary issue to performance evaluation is functional correctness of a running system, which confirms that the system fulfills its functional requirements and does not contain any flaws. To address the second part of the question that is “ how to evaluate ”, we have adopted the well-known formal verification and validation techniques. As the scope of the project is very big, the focus of this thesis is on early design stage evaluation to verify and validate the functional correctness of the systems design. For the proof-of-concept, we applied two methods: In the first method, we studied automatic verification approaches and used a well-known model checking approach to model and verify the functional requirements of a context aware medication management system for the elderly in a Smart House. This approach is complementary to testing and evaluation, it allows designers to verify their system behavior against its functional requirements before developing the system prototype. Some basic properties like the availability or liveliness, deadlock checking, matching of specification and implementation, and reachability analysis are verified. In the second method, we studied the runtime verification approaches and used design by contract technique to model and verify the semantic and pragmatic service interoperability requirements in smart environments. The analysis of this technique and results are presented. The benefit of the approach is automatic verification of services interoperability in smart environments on the fly.

Multiple transitions between care settings have been reported to affect the quality of life of the older adults and their families. In Canada, there have been no studies that have examined transitions between care settings at the end of life in older adults who are on homecare. The aim of this thesis was to address this gap, and to describe transitions between care settings in older homecare clients towards the end of their life and examine what personal, health system and health service use factors predict these transitions. The sample used in this study was the cohort of individuals 65 years and older(n=7866) who died in Manitoba within the fiscal years 2003-2006, and who received homecare for at least 30 days in the last year of their life. The outcome variables in this study were transitions and independent variables included demographic (e.g., age, sex), health service use (homecare days) and system factors (e.g., hospital bed supply). The study involved secondary data analysis of anonymized administrative data (the hospital, homecare and personal care home (PCH) data), vital statistics data, health insurance registry, census data, and annual provincial statistical reports. Descriptive and inferential data analyses methods were used to analyze the data in the study. It was found in the study that more than half of the homecare clients had one or more transitions between care settings in their last month of life, and more than half of the homecare clients in the study died in hospitals. Homecare clients who were males, in the 75-84 years age group, received more homecare days and lived in regions of high hospital bed supply were more likely to have one or more transitions in the last month of their life, and those who were single, in the lower income quintile groups, lived in regions of high physician and PCH bed supply had lower odds of having one or more transitions. The findings suggest the need for increasing palliative care and homecare services to reduce transitions and hospital deaths at the end of life. Increasing physician supply, particularly in rural areas should also be considered. Future studies should also attempt to classify which of the transitions towards the end of life were essential or burdensome.

Background: The high levels of sickness absence and disability pensioning experienced during the 1990's and 2000's have become both socially as well as financially burdensome for society. Sickness absence implies a costly loss of production for society and large groups of individuals are risking to become marginalised on the labour market. Sickness absence is both a public health and an economic problem. Thus from both a human approach as well as from an economic perspective it is urgent to increase knowledge about what influences individual behaviour when it comes to sickness absence and return to work. Objectives: The overall aim of the thesis is to elucidate the decisive factors for explaining sickness absence. Three different aspects of sickness absence were considered, i.e. factors leading to sickness absence, factors preventing sickness absence and factors leading back to work ability and work when being sickness absent. This is done using a frame of reference involving broadly defined areas of work, health and social insurance related factors. Material and methods: Study I analyzes the outcome of unemployed sick-listed individuals. A total of 280 individuals from the county of Värmland were followed through register data between the years 2000 to 2001. Linear and logistic regression models were used to analyze the occurrence of short and long term economic incentives. Study II has a longitudinal design and explores determinants of return to work. Sick-listed individuals with a stress-related psychiatric diagnosis from the county of Värmland were analyzed over a period of three years (2000-2003) using logistic regression. The data comprised 911 individuals. Study III is a cross-sectional study using questionnaire data from the county of Värmland from year 2004. A total of 3123 persons either working or being self employed were analyzed on determinants of work presence through logistic regression. Study IV had a cross-sectional design and used questionnaire data from five counties in central Sweden. The data, from 2004, comprised 10536 individuals being employed, i.e. not self-employed, and with self reported physical and mental medical conditions. Logistic regression was mainly used in the analysis and the focus was on risk factors for long term sickness absence. Study V comprises cross-sectional data retrieved at three separate occasions between 1991 and 1994. It includes 8839 individuals from five counties in western Sweden with sickness absence spells over 60 days. The data was analysed through bi-variate probit regression with a focus on effects of vocational rehabilitation on return to work. Results: The results from study I were interpreted as that both short and long term economic incentives matter for the outcome of sickness absence through the interaction of different insurance systems. The principal findings from study II was that age, gender and factors implying less favourable health characteristics and thereby lower work capacity, reduce probabilities of returning to work after long term sickness absence. Considering study III determinants of work presence were found to vary between sexes and whether the determinants were counteracting long or short term sickness absence. Factors interpreted as job control counteracted short term absence. Sense of coherence was found to be an important determinant of work presence for women. In study IV long term sickness absence was found to be related to the level of ill-health. Moreover it was concluded that work environment factors as job strain, job satisfaction, physical work environment were important factors for explaining sickness absence in a population with impaired health. The results from study V indicated that vocational rehabilitation is a potentially effective instrument for improving the individual's work ability and chances of return to work. That no signs of prioritizing selection of rehabilitation participants to those likely to return to work with or without rehabilitation measures, i.e. "managerial creaming", were found was also considered as important results. Conclusions: This thesis shows that we need different models and approaches to improve knowledge about the various aspects of sickness absence as entry into absence, return to work or into disability retirement. It also has the implications that sickness absence behaviour can be influenced. Largely depending on what long term path is chosen for welfare policy at the political level it should be acknowledged that other means, improving working conditions and promoting rehabilitation rather than reducing benefit levels and narrowing the eligibility criteria for the insurance benefits are at hand.

Master of Public Health - MPH / Two quantitative studies were carried out in randomly-selected facilities within all nine provinces of South Africa. First, a situational assessment of these randomly selected facilities was undertaken using key informant (health care personnel) interviews and record reviews to ascertain guidelines and procedures for early identification of HIV-exposed infants (HEI), the coverage of early infant diagnosis services, the human resource capacity of the health system, and existing linkage and referral system for antenatal and postnatal PMTCT services. This was followed by the South African national PMTCT survey (SAPMTCTE) which involved a collection of infant blood samples and maternal interview data from mother-infant pairs (infants age 4-8weeks) attending six weeks immunisation service points in the selected facilities. Interviews were conducted with mothers to assess antenatal and peripartum PMTCT services received and maternal intention to request for infant HIV testing at six weeks immunisation visits. Data on gestational age at birth, infant birth weight and HIV status was extracted from the road-to-health-card (RtHC). The HIV status of mothers was determined from maternal report or enzyme immunoassay (EIA) test conducted on infants dried blood spots (DBS). A weighted analysis (weighted for sample size realisation and population live births) was performed to assess uptake of services along the PMTCT cascade. Mothers who either self-reported an HIV-positive status or had an EIA positive infant were classified as HIV-positive mothers. Perinatal ARV regimen coverage was calculated from the total number of HIV-positive mothers who received maternal azidothymidine (AZT) or HAART for any duration during pregnancy plus infant nevirapine (NVP)/AZT received at birth. Descriptive methods were used to analyse national availability of EID services and approaches for identifying HEI at the six weeks immunisation visit. Logistic regression assessed key factors influencing maternal intention to receive EID. Logistic regression was also used to explore individual, health facility and provincial level factors that explain variability in mother-to-child-transmission rates.

<p>The purpose of this study is to investigate teachers 'and students' understanding of why students finish school with incomplete scores and which resources they consider necessary for students to accomplish the goals that are set for the students. Owing to the reuse of pupils and teachers' experiences, this study will highlight significant qualitative aspects of work with students who finish school with incomplete high school grades. Hopefully, will this study be a support and information base in secondary school.</p><p>The material forming the basis for the report's theoretical assumptions and the basic assumption is based on Lev Vygotsky sociocultural perspective on learning that Olga Dysthe discuss and develop further in his book, <em>Dialog, samspel och lärande</em>.  The present work is based on qualitative research method. I selected this research method because I am interested in getting an understanding of the importance and significance of this research The study applied a qualitative interview format.</p><p>As a result of the investigation as it has appeared that students difficulties to achieve the goals,depends on several factors, mostly on the student's socio-economic and psychosocial situation they live in. The life situation of the students determines the learning and knowledge process and how they reach their goals. The study concludes that a better synergy between the various stages need to be improved, the necessary resources, teachers need to understand the course objectives and then enlighten them to the students. As a final point, more explicit syllabus is needed owing to the easiness of being interpretable. Having more straightforward syllabus, unfair judgment will be prevented.</p><p> </p>

The purpose of this study is to investigate teachers 'and students' understanding of why students finish school with incomplete scores and which resources they consider necessary for students to accomplish the goals that are set for the students. Owing to the reuse of pupils and teachers' experiences, this study will highlight significant qualitative aspects of work with students who finish school with incomplete high school grades. Hopefully, will this study be a support and information base in secondary school. The material forming the basis for the report's theoretical assumptions and the basic assumption is based on Lev Vygotsky sociocultural perspective on learning that Olga Dysthe discuss and develop further in his book, Dialog, samspel och lärande.  The present work is based on qualitative research method. I selected this research method because I am interested in getting an understanding of the importance and significance of this research The study applied a qualitative interview format. As a result of the investigation as it has appeared that students difficulties to achieve the goals,depends on several factors, mostly on the student's socio-economic and psychosocial situation they live in. The life situation of the students determines the learning and knowledge process and how they reach their goals. The study concludes that a better synergy between the various stages need to be improved, the necessary resources, teachers need to understand the course objectives and then enlighten them to the students. As a final point, more explicit syllabus is needed owing to the easiness of being interpretable. Having more straightforward syllabus, unfair judgment will be prevented.

In higher education institutions, virtual learning systems (VLSs) have been adopted, and are becoming increasingly popular among educators. However, despite this ubiquity of VLS use, there has not been widespread change in pedagogic practice to take advantage of the functionality afforded by VLSs. Knowledge of the actual usage of e-learning systems is limited in terms of what specific feature sets are deemed useful, and how this influences system usage. VLSs have a suite of tools with associated functions/features and properties, as well as non-functional system characteristics. In addition, these systems incorporate pedagogic features to cater for online teaching. Educators in higher education, who are the chief agents of e-learning, are confounded by system-related, pedagogic, organisational, user difference and demographic factors that influence VLS usage. Virtual learning system usage involves system feature usage extent and frequency, total system usage and usage clusters. The aim of this study is to develop a model representing the factors that influence usage of VLSs in higher education. The links between system usage and system-related factors, pedagogic factors, organisational factors, user-difference and demographic factors is researched. This research incorporated a literature study, a pilot study, interviews and surveys. A case study research strategy was combined with a mixed methods research design. The results of the qualitative analysis was triangulated with the findings of the quantitative analysis and compared to the findings of the literature study. The study was conducted at two residential higher education institutions (HEI), namely, University of KwaZulu-Natal and Durban University of Technology. The main contribution of this study is the Virtual Learning System Usage Model (VLSUM) representing the factors that influence VLS usage in residential higher education institutions. The proposed VLSUM is based on the empirical results of this study. VLSUM can be used by managers of educational technology departments and instructional designers to implement interventions to optimize usage. The constructs of VLSUM confirmed existing theories, replicated and synthesised theories from different fields, and extended existing models to produce a new model for understanding the factors that influence VLS usage in higher education. / Computing / D. LITT. et. Phil. (Information Systems)

In higher education institutions, virtual learning systems (VLSs) have been adopted, and are becoming increasingly popular among educators. However, despite this ubiquity of VLS use, there has not been widespread change in pedagogic practice to take advantage of the functionality afforded by VLSs. Knowledge of the actual usage of e-learning systems is limited in terms of what specific feature sets are deemed useful, and how this influences system usage. VLSs have a suite of tools with associated functions/features and properties, as well as non-functional system characteristics. In addition, these systems incorporate pedagogic features to cater for online teaching. Educators in higher education, who are the chief agents of e-learning, are confounded by system-related, pedagogic, organisational, user difference and demographic factors that influence VLS usage. Virtual learning system usage involves system feature usage extent and frequency, total system usage and usage clusters. The aim of this study is to develop a model representing the factors that influence usage of VLSs in higher education. The links between system usage and system-related factors, pedagogic factors, organisational factors, user-difference and demographic factors is researched. This research incorporated a literature study, a pilot study, interviews and surveys. A case study research strategy was combined with a mixed methods research design. The results of the qualitative analysis was triangulated with the findings of the quantitative analysis and compared to the findings of the literature study. The study was conducted at two residential higher education institutions (HEI), namely, University of KwaZulu-Natal and Durban University of Technology. The main contribution of this study is the Virtual Learning System Usage Model (VLSUM) representing the factors that influence VLS usage in residential higher education institutions. The proposed VLSUM is based on the empirical results of this study. VLSUM can be used by managers of educational technology departments and instructional designers to implement interventions to optimize usage. The constructs of VLSUM confirmed existing theories, replicated and synthesised theories from different fields, and extended existing models to produce a new model for understanding the factors that influence VLS usage in higher education. / Computing / D. LITT. et. Phil. (Information Systems)

D. Tech. (Business, Faculty of Management Sciences), Vaal University of Technology / Organisational performance in the public sector has emerged as a critical topic in the post-1994 era in South Africa. This could ostensibly be attributed to the inability of the majority of most public organisations in the country to deliver a satisfactory standard of service to the public. An intense controversy has also emerged the world over on the selection of performance measures that are appropriate for use in public organisations. This debate is actuated by the existence of a multiplicity of performance measurement indices as well as frameworks that can be applied to manage performance in organisations. The existence of these multiple measurement mechanisms tends to confound the entire process of managing organisational performance. Another unresolved controversy focuses on the extent to which various organisational resources impact on organisational performance. The purpose of this study was to examine the relationship between organisational performance and three organisational resources; specifically, the human factor, organisational systems and organisational processes. A quantitative design was adopted in which a survey questionnaire was administered to 272 managers and employees of a South African National Government Department. Respondents were selected using a blend of purposive sampling and convenience sampling approaches. Data were analysed using the Statistical Packages for the Social Sciences (SPSS version 20.0). Reliabilities were measured using Cronbach’s alpha coefficient. Exploratory factor analysis was used to identify the human factors, organisational systems and organisational processes. Spearman’s correlation and multiple linear regression analyses were used to investigate the relationship between organisational performance and the sub-elements under each of the three organisational resources. The impacts of each of the three factors on organisational performance were compared using the mean-score ranking technique. Performance of the National Government Department was measured using the four performance yardsticks of the Balanced Scorecard; namely, customer satisfaction, financial performance, innovation and learning, and internal processes The findings of the study revealed that performance of the National Government Department was highest in four strategic areas; which are the promotion of good corporate ethics and values, client satisfaction, service quality and relations with external organisations. However, performance shortfalls were observed in four key areas; namely, organisational speed, attrition of manpower, overloading of employees and the overburdening of divisions with high workloads. Correlation analysis showed that there were positive relationships between organisational performance and the five human factor components; life satisfaction, quality of work life, ability utilisation, creativity and autonomy. Regression analysis indicated that there were significant and predictive relationships between organisational performance and three human factor elements; namely, quality of work life, ability utilisation and life satisfaction. Among the five human factor elements, life satisfaction exerted the greatest impact on organisational performance. Significant, positive and predictive associations were also found between organisational performance and three organisational system factors; quality, innovation and inter-organisational systems, with quality exerting the greatest impact on organisational performance. Significant, positive and predictive relationships were further observed between organisational performance and the four organisational process factors identified in the study; namely, organisational structure, organisational change, team processes and organisational change. Among these, team processes exerted the greatest influence on organisational performance. Overall, the human factor applied the greatest impact on organisational performance, followed by organisational processes with organisational systems having the least impact. Based on these findings, recommendations were made and implications for further studies were suggested. The findings of the study provide empirical confirmation of the effectiveness of the Balanced Scorecard as a tool for the measurement and management of performance in public sector organisations. Additionally, managers in different public organisations may enhance the performance of their organisations by optimising the sub-elements of the three organisational resources examined in this study.