Indiana University-Purdue University Indianapolis (IUPUI) / In the early 1950s, President Dwight Eisenhower encouraged citizens to “Wake Up! Sign Up! Look Up!” to the Soviet atomic threat by joining the Ground Observer Corps (GOC). Established by the United States Air Force (USAF), the GOC involved civilian volunteers surveying the skies for Soviet aircraft via watchtowers, alerting the Air Force if they suspected threatening aircraft. This thesis examines the 1950s response to the longstanding problem posed by the invention of any new weapon: how to adapt defensive technology to meet the potential threat. In the case of the early Cold War period, the GOC was the USAF’s best, albeit faulty, defense option against a weapon that did not discriminate between soldiers and citizens and rendered traditional ground troops useless. After the Korean War, Air Force officials promoted the GOC for its espousal of volunteerism and individualism. Encouraged to take ownership of the program, observers appropriated the GOC for their personal and community needs, comprised of social gatherings and policing activities, thus greatly expanding the USAF’s original objectives.

This dissertation is a report on a study about autobiography as genre, focusing on the voice of the white, Afrikaans-speaking woman. The point of departure for this study was a survey of the number of autobiographies written in Afrikaans by these women. With the focus on the limited number of such autobiographies three autobiographies were studied, namely, Met die Boere in die veld (Sarah Raal), My beskeie deel (M.E.R.) and 'n Wonderlike geweld (Elsa Joubert). Within the framework of the complexity systems theory the role of the observer (author/reader) was studied to determine the possibility of demonstrating that when reading/writing an autobiography, some epistemological changes may occur, manifesting as conceptual changes in the mind of the observer. It could be demonstrated that because of women's sensitivity to interpersonal relationships they are capable of acting as unique registers of the complexity of individual existence, while remaining aware of the constant influence, effect and needs of the other. / AFRIKAANS & THEORY OF LIT / MA (AFRIKAANS)

In this thesis, I explore the impact and effectiveness of clinical supervision provided by external clinical supervisors, on workers from a variety of practice backgrounds in a residential rehabilitation centre, in the AOD sector. This thesis uses the framework of social work supervision, as defined by Kadushin (1985; 2002), with the administrative, educative and supportive elements. The research focuses closely on the latter two elements. For this purpose, I employ qualitative research methods, via a triangulation of methods, being guided by Participatory Action Research (PAR) and then conducting semi-structured interviews and focus groups as well as acting as a participant observer, to gather the data. The data was analysed using grounded theory. This research was based upon a clinical supervision project that was fully funded and provided free clinical supervision by external supervisors, providing both individual and group supervision, for a period of 10 months. There were a total of 16 respondents with varied roles and training backgrounds as well as an additional six supervisors, interviewed throughout different stages of the project. The various roles undertaken by me throughout the research process provided essential viewpoints on supervision, as well as the place of boundaries and need for support. The power of such a large scale intervention is discussed and ultimately highlights and identifies the particular benefits of supervision in this research arena. This thesis places clinical supervision in the context of workforce development in the Alcohol and Other Drug (AOD) sector. Thus, while this research elucidates a number of benefits and the factors involved with this experience, the clear separation of other modalities such as training, mentoring and Critical Incident debriefing are seen as integral additional avenues of support and professional development. This research concludes also with what the difficulties and hindrances were for people to continue with regular ongoing clinical supervision, and warrants the argument for interminable supervision in this setting. This research points to an overall paucity of literature on efficacy studies, especially in the AOD context in Australia. This research significantly adds to this dearth and examines the factors unique to the AOD sector in Australia, as well as what factors make for effective supervision. The particular impact of external supervisors and group supervision are explored, which underwrites the forwarded concept of a customised supervision for this setting. By making explicit in this research what the efficacy is on those new to supervision, it provides greater clarity for future studies. A number of recommendations are proposed as result of this research. New definitions of the supportive function of supervision and of clinical supervision are forwarded, as is a new look at the evolving history of social work supervision. This thesis highlights the impact of external supervisors and the unique contribution they offer.

With the rapidly growing computational power of modern computers, physically based rendering has found its way into real world applications. Real-time simulations and renderings of fire and smoke had become one major research interest in modern video game industry, and will continue being one important research direction in computer graphics. To visually recreate realistic dynamic fire and smoke is a complicated problem. Furthermore, to solve the problem requires knowledge from various areas, ranged from computer graphics and image processing to computational physics and chemistry. Even though most of the areas are well-studied separately, when combined, new challenges will emerge. This thesis focuses on three aspects of the problem, dynamic, real-time and realism, to propose a solution in form of a GPGPU pipeline, along with its implementation. Three main areas with application in the problem are discussed in detail: fluid simulation, volumetric radiance estimation and volumetric rendering. The weights are laid upon the first two areas. The results are evaluated around the three aspects, with graphical demonstrations and performance measurements. Uniform grids are used with Finite Difference (FD) discretization scheme to simplify the computation. FD schemes are easy to implement in parallel, especially with ComputeShader, which is well supported in Unity engine. The whole implementation can easily be integrated into any real-world applications in Unity or other game engines that support DirectX 11 or higher.

This dissertation is a report on a study about autobiography as genre, focusing on the voice of the white, Afrikaans-speaking woman. The point of departure for this study was a survey of the number of autobiographies written in Afrikaans by these women. With the focus on the limited number of such autobiographies three autobiographies were studied, namely, Met die Boere in die veld (Sarah Raal), My beskeie deel (M.E.R.) and 'n Wonderlike geweld (Elsa Joubert). Within the framework of the complexity systems theory the role of the observer (author/reader) was studied to determine the possibility of demonstrating that when reading/writing an autobiography, some epistemological changes may occur, manifesting as conceptual changes in the mind of the observer. It could be demonstrated that because of women's sensitivity to interpersonal relationships they are capable of acting as unique registers of the complexity of individual existence, while remaining aware of the constant influence, effect and needs of the other. / AFRIKAANS and THEORY OF LIT / MA (AFRIKAANS)

Enhancing mineral processing techniques is a permanent challenge in the mineral and metal industry. Indeed to satisfy the requirements on the final product (metal) set by the consuming market, control is often applied on the mineral processing whose product, the ore concentrate, constitutes the input material of the extractive metallurgy. Therefore much attention is paid on mineral processing units and especially on concentration plants. As the ore size reduction procedure is the critical step of a concentrator, it turns out that controlling a grinding circuit is crucial since this stage accounts for almost 50 % of the total expenditure of the concentrator plant. Moreover, the product particle size from grinding stage influences the recovery rate of the valuable minerals as well as the volume of tailing discharge in the subsequent process.<p> The present thesis focuses on an industrial application, namely the Kolwezi concentrator (KZC) double closed-loop wet grinding circuit. As any industrial wet grinding process, this process offers complex and challenging control problems due to its configuration and to the requirements on the product characteristics. In particular, we are interested in the modelling of the process and in proposing a control strategy to maximize the product flow rate while meeting requirements on the product fineness and density.<p> A mathematical model of each component of the circuit is derived. Globally, the KZC grinding process is described by a dynamic nonlinear distributed parameter model. Within this model, we propose a mathematical description to exhibit the increase of the breakage efficiency in wet operating condition. In addition, a relationship is proposed to link the convection velocity to the feed ore rate for material transport within the mills.<p> All the individual models are identified from measurements taken under normal process operation or from data obtained through new specific experiments, notably using the G41 foaming as a tracer to determine material transport dynamics within the mills. This technique provides satisfactory results compared to previous studies.<p>Based on the modelling and the circuit configuration, both steady-state and dynamic simulators are developed. The simulation results are found to be in agreement with the experimental data. These simulation tools should allow operator training and they are used to analyse the system and to design the suitable control strategy.<p> As the KZC wet grinding process is a Multi-Input Multi-Output (MIMO) system, we propose a decentralized control scheme for its simplicity of implementation. To overcome all the control issues, a Double Internal Model Control (DIMC) scheme is proposed. This strategy is a feedforward-feedback structure based on the use of both a modified Disturbance Observer (DOB) and a Proportional-Integral Smith-Predictor (PI-SP). A duality between the DOB and PI-SP is demonstrated in design method. The latter is exploited to significantly simplify the design procedure. The designed decentralized controllers are validated in simulation on the process linearized model. A progressive implementation of the control strategy is proposed in the context of the KZC grinding circuit where instrumentation might not be obvious to acquire./<p><p> Améliorer les techniques de traitement de minerais est un défi permanent dans l'industrie des minéraux et des métaux. En effet, pour satisfaire aux exigences du produit fini (métal ) fixées par le marché de consommation, la commande automatique est souvent appliquée à l'usine du traitement de minerais dont le produit, le concentré, constitue la matière première de la métallurgie extractive. Une attention particulière est donc dévolue aux unités de traitement de minerais et en particulier aux concentrateurs. Comme le processus de réduction des dimensions granulométriques du minerai est l'étape critique d'un concentrateur, il s'avère que la commande d'un circuit de broyage est cruciale, car ce stade représente près de 50 % des dépenses totales de l' usine de concentration. De plus, la dimension granulométrique du produit de l'étape de broyage influe sur le taux de récupération des minéraux utiles ainsi que sur le volume des rejets du processus ultérieur.<p> La présente thèse porte sur une application industrielle, à savoir le concentrateur de Kolwezi (KZC qui est un circuit de broyage humide à double boucle fermée. Comme tout processus industriel de broyage humide, ce procédé présente une problématique de commande complexe et difficile en raison de sa configuration et des exigences relatives aux caractéristiques du produit. En particulier, nous nous intéressons à la modélisation de ce procédé et à proposer une stratégie adéquate de commande dans le but de maximiser le débit de production tout en respectant les exigences quant à la finesse et à la densité de la pulpe produite.<p> Un modèle mathématique de chaque composant du circuit a été déterminé. Globalement, le processus de broyage de KZC est décrit par un modèle dynamique non linéaire à paramètres distribués. Dans ce modèle, une description mathématique de l'augmentation de l'efficacité du broyage en milieu humide est proposée. En outre, nous avons proposé une relation liant la vitesse de convection au débit d'alimentation de minerais dans le modèle du transport de la matière à l'intérieur des broyeurs.<p> Tous les modèles mathématiques ont été identifiés à partir de mesures prises sur le procédé en fonctionnement d'équilibre stable ou à partir des données obtenues grâce à des nouvelles expériences spécifiques, notamment en utilisant le moussant G41 comme traceur pour déterminer la dynamique de transport de la matière dans les broyeurs. Cette technique a produit des résultats cohérents par rapport aux études antérieurs réalisées au moyen du traceur colorant ou radioactif.<p> Les simulateurs statique et dynamique ont été développés sur la base de la modélisation mathématique et de la configuration du circuit. Les résultats des simulations sont en accord avec les données expérimentales. Ces outils de simulation devraient permettre la formation des opérateurs et ont été utilisés pour analyser le système et concevoir la stratégie de commande la plus appropriée.<p> Comme le processus de broyage humide de KZC est un système à plusieurs grandeurs d'entrée et plusieurs grandeurs de sortie, nous avons proposé une structure de commande décentralisée en raison de sa simplicité de mise en œuvre .Afin de surmonter tous les problèmes de commande, un schéma de commande à double modèle interne (CDMI) est proposée. Cette stratégie est une structure à anticipation - rétroaction basée sur l'utilisation d'un observateur de perturbations (OBP) et d'un Prédicteur de Smith doté d'un régulateur Proportionnel-Intégral (PS-PI). Une dualité entre l'OBP et le PS-PI est démontrée dans la méthode de conception. Cette propriété est exploitée pour simplifier considérablement la procédure de conception. Les régulateurs décentralisés ainsi conçus sont validés en simulation sur le modèle linéarisé du procédé. Une mise en œuvre progressive de la stratégie de commande est proposée dans le contexte du circuit de broyage de KZC où l'instrumentation peut ne pas être évidente à acquérir.<p> <p> / Doctorat en Sciences de l'ingénieur / info:eu-repo/semantics/nonPublished

The purpose of this qualitative research study, which utilizes a phenomenological inquiry method, is to inquire into the awareness of what it means to be a whole teacher from the perspective of the philosophy of Jiddu Krishnamurti, a philosopher/spiritual teacher. Four participants (teachers) were interviewed from the Oak Grove School, an alternative, holistic school founded by Krishnamurti in 1974. This inquiry probed into teachers’ thinking, teachers’ lives, teachers’ inner lives, teachers’ contemplative practices, teachers’ calling/vocation and teachers’ pedagogy. The findings of this inquiry reveal the awareness that exists among the participants with regards to their understanding of Krishnamurti’s educational philosophy and the way in which this philosophy has shaped their lives and the lives of their students (both implicit- ly and explicitly) The findings from this research further show that Krishnamurti’s philosophy has certainly had an impact on the participants’ wholeness. Krishnamurti was never interested in imposing his philosophy on the teachers to think in a narrow groove. Rather, he challenged them to arrive at wholeness or a holistic approach towards living by their own volition, by putting aside all philosophy, including his own. This research points towards the possible ways in which wholeness can be developed using: Innate wisdom (teachers’ inner life, teachers’ calling); wisdom gained through experiencing life (teachers’ life, teachers’ thinking); wisdom gained through their teaching experience (teachers’ pedagogy) and wisdom gained through practices that bring harmony to the mind, body and spirit (teachers’ contemplative approaches). An experiential model titled, The Flower Model: An Experiential Metaphor – which integrates the three stages of awareness – was developed using Krishnamurti’s approach towards wholeness. This model can be used to guide teachers with their respective psychological conditionings that reside or exist in their thinking, lives, inner lives, contemplative practices, vocation and pedagogy/curriculum design.

The purpose of this qualitative research study, which utilizes a phenomenological inquiry method, is to inquire into the awareness of what it means to be a whole teacher from the perspective of the philosophy of Jiddu Krishnamurti, a philosopher/spiritual teacher. Four participants (teachers) were interviewed from the Oak Grove School, an alternative, holistic school founded by Krishnamurti in 1974. This inquiry probed into teachers’ thinking, teachers’ lives, teachers’ inner lives, teachers’ contemplative practices, teachers’ calling/vocation and teachers’ pedagogy. The findings of this inquiry reveal the awareness that exists among the participants with regards to their understanding of Krishnamurti’s educational philosophy and the way in which this philosophy has shaped their lives and the lives of their students (both implicit- ly and explicitly) The findings from this research further show that Krishnamurti’s philosophy has certainly had an impact on the participants’ wholeness. Krishnamurti was never interested in imposing his philosophy on the teachers to think in a narrow groove. Rather, he challenged them to arrive at wholeness or a holistic approach towards living by their own volition, by putting aside all philosophy, including his own. This research points towards the possible ways in which wholeness can be developed using: Innate wisdom (teachers’ inner life, teachers’ calling); wisdom gained through experiencing life (teachers’ life, teachers’ thinking); wisdom gained through their teaching experience (teachers’ pedagogy) and wisdom gained through practices that bring harmony to the mind, body and spirit (teachers’ contemplative approaches). An experiential model titled, The Flower Model: An Experiential Metaphor – which integrates the three stages of awareness – was developed using Krishnamurti’s approach towards wholeness. This model can be used to guide teachers with their respective psychological conditionings that reside or exist in their thinking, lives, inner lives, contemplative practices, vocation and pedagogy/curriculum design.