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abstract: Building computational models of human problem solving has been a longstanding goal in Artificial Intelligence research. The theories of cognitive architectures addressed this issue by embedding models of problem solving within them. This thesis presents an extended account of human problem solving and describes its implementation within one such theory of cognitive architecture--ICARUS. The document begins by reviewing the standard theory of problem solving, along with how previous versions of ICARUS have incorporated and expanded on it. Next it discusses some limitations of the existing mechanism and proposes four extensions that eliminate these limitations, elaborate the framework along interesting dimensions, and bring it into closer alignment with human problem-solving abilities. After this, it presents evaluations on four domains that establish the benefits of these extensions. The results demonstrate the system's ability to solve problems in various domains and its generality. In closing, it outlines related work and notes promising directions for additional research. / Dissertation/Thesis / M.S. Computer Science 2011

The notion of Mode 2, as a shift from Mode 1 science-as-we-know-it, depicts science as practically relevant, socially distributed and democratic. Debates remain over the empirical substantiation of Mode 2. In particular, our understanding has been impeded by the mutually exclusive framing of Mode 1/Mode 2. Looking at how academic science is justified to diverse institutional interests – a situation associated with Mode 2 – it is asked, “What happens to Mode 1 where Mode 2 is in demand?” This study comprises two sequential phases. It combines interviews with 18 university spinout founders as micro-level Mode 2 exemplars, and macro-level policy narratives from 72 expert witnesses examined by select committees. An interpretive scheme (Greenwood and Hinings, 1988) is applied to capture the internal means-ends structure of each mode, where the end is to satisfy demand constituents, both in academia (Mode 1) and beyond (Mode 2). Results indicate Mode 1’s enduring influence even where non-academic demands are concerned, thus refuting that means and ends necessarily operate together as a stable mode. The causal ambiguity inherent in scientific advances necessitates (i) Mode 1 peer review as the only quality control regime systematically applicable ex ante, and (ii) Mode 1 means of knowledge production as essential for the health and diversity of the science base. Modifications to performance criteria are proposed to create a synergy between modes and justify public investment, especially in the absence of immediate outcomes. The study presents a framework of Mode1/Mode 2 coexistence that eases the problem with the either/or perception and renders Mode 2 more amenable to empirical research. It is crucial to note, though, that this is contingent on given vested interests. In this study, Mode 1’s fate is seen through academic scientists whose imperative is unique from those of other constituents, thereby potentially entailing further struggles and negotiation.

The notion of Mode 2, as a shift from Mode 1 science-as-we-know-it, depicts science as practically relevant, socially distributed and democratic. Debates remain over the empirical substantiation of Mode 2. In particular, our understanding has been impeded by the mutually exclusive framing of Mode 1/Mode 2. Looking at how academic science is justified to diverse institutional interests – a situation associated with Mode 2 – it is asked, “What happens to Mode 1 where Mode 2 is in demand?” This study comprises two sequential phases. It combines interviews with 18 university spinout founders as micro-level Mode 2 exemplars, and macro-level policy narratives from 72 expert witnesses examined by select committees. An interpretive scheme (Greenwood and Hinings, 1988) is applied to capture the internal means-ends structure of each mode, where the end is to satisfy demand constituents, both in academia (Mode 1) and beyond (Mode 2). Results indicate Mode 1’s enduring influence even where non-academic demands are concerned, thus refuting that means and ends necessarily operate together as a stable mode. The causal ambiguity inherent in scientific advances necessitates (i) Mode 1 peer review as the only quality control regime systematically applicable ex ante, and (ii) Mode 1 means of knowledge production as essential for the health and diversity of the science base. Modifications to performance criteria are proposed to create a synergy between modes and justify public investment, especially in the absence of immediate outcomes. The study presents a framework of Mode1/Mode 2 coexistence that eases the problem with the either/or perception and renders Mode 2 more amenable to empirical research. It is crucial to note, though, that this is contingent on given vested interests. In this study, Mode 1’s fate is seen through academic scientists whose imperative is unique from those of other constituents, thereby potentially entailing further struggles and negotiation.

Based on the limited outcomes and often failed implementation processes of annual employee surveys a new phenomenon for collecting people data has risen; the pulsed employee survey. This survey and its continuous way of measuring are by many providers and consultants stated to be an important tool that increases employee engagement. The phenomenon of the pulsed employee survey has so far received limited academic attention, despite its growing importance as a potential institutionalized practice. Therefore, this study aims at broadening the understanding of the phenomenon of the pulsed employee survey. How is it transformed into organizations during an implementation process and can the process be seen as coupled or decoupled from the institutionalized practice? Further, what explains the potential coupling or decoupling? To investigate this, a model based on decoupling theories by Bromley & Powell(2012) has been used through a qualitative case study. The result shows that, even though the surveys are implemented into the organizations, means-ends decoupling can be found, whichmay be explained by the complexity of what is measured as well as the multifaceted expectations and perceptions at different organizational levels.

O presente trabalho examina o chamado problema da indeterminação jurídica, de maneira a procurar explicitar o tipo de questões teóricas que suscita e apreciar o alcance ou fecundidade das respostas que tais questões possibilitam, sobretudo sob o ângulo da discussão dos pressupostos institucionais subjacentes à organização das atividades de aplicação do direito. Nesse contexto, a tese central do trabalho é a de que a ideia de indeterminação do direito, restrita ao contexto jurisdicional e entendida como um fenômeno linguístico, esgotou seu potencial teórico, e que a percepção desse esgotamento deveria conduzir à exploração de formas pelas quais questões de indeterminação do direito podem ser mais produtivamente tratadas como questões sobre configuração institucional do que como questões sobre a natureza, ou defeitos, da linguagem. São analisadas abordagens paradigmáticas do problema - no pensamento de Hans Kelsen, H.L.A. Hart e Ronald Dworkin - e os pressupostos institucionais que as informam, assim como identificados pontos de partida, nos estudos de Lon L. Fuller voltados à avaliação de formas alternativas de organização social, para exercícios de inovação institucional. A possibilidade de tais exercícios é exemplificada, ao final do trabalho, com propostas específicas de inovação, elaboradas por autores contemporâneos, concentradas na função jurisdicional, dirigidas a enfrentar o reconhecido impasse entre propostas de expansão e contenção da atuação judicial no contexto de efetivação de direitos sociais de caráter distributivo. / This work analyses the so-called legal indeterminacy problem, in order to make explicit the kind of theoretical issues it engenders and to assess the scope or fecundity of the answers such issues make possible, especially in terms of the discussion of institutional assumptions underlying the organization of the adjudicative function. In this setting, the central claim of this work is that the theoretical potential of the idea of legal indeterminacy, limited to the adjudicative realm and understood mainly as a linguistic phenomenon, has been worn out, and that the acknowledgment of this result should lead to the investigation of ways in which ?legal indeterminacy? issues might be more productively treated as issues about institutional innovation than issues about the nature, or defects, of language. The exemplary works of Hans Kelsen, H.L.A. Hart, and Ronald Dworkin and the institutional assumptions underlying their thought, in connection with the indeterminacy problem, are reviewed, along with the writings of Lon L. Fuller dedicated to the assessment of alternative processes of social ordering, which are taken as a point of departure for exercises in institutional innovation. The possibility of such exercises is illustrated, at the end of this work, with specific innovation proposals by contemporary authors focused on the adjudicative job, dedicated to facing the theoretical deadlock between proposals for expanding and restricting the judicial role in the context of making welfare rights, of a distributive character, concrete

O presente trabalho examina o chamado problema da indeterminação jurídica, de maneira a procurar explicitar o tipo de questões teóricas que suscita e apreciar o alcance ou fecundidade das respostas que tais questões possibilitam, sobretudo sob o ângulo da discussão dos pressupostos institucionais subjacentes à organização das atividades de aplicação do direito. Nesse contexto, a tese central do trabalho é a de que a ideia de indeterminação do direito, restrita ao contexto jurisdicional e entendida como um fenômeno linguístico, esgotou seu potencial teórico, e que a percepção desse esgotamento deveria conduzir à exploração de formas pelas quais questões de indeterminação do direito podem ser mais produtivamente tratadas como questões sobre configuração institucional do que como questões sobre a natureza, ou defeitos, da linguagem. São analisadas abordagens paradigmáticas do problema - no pensamento de Hans Kelsen, H.L.A. Hart e Ronald Dworkin - e os pressupostos institucionais que as informam, assim como identificados pontos de partida, nos estudos de Lon L. Fuller voltados à avaliação de formas alternativas de organização social, para exercícios de inovação institucional. A possibilidade de tais exercícios é exemplificada, ao final do trabalho, com propostas específicas de inovação, elaboradas por autores contemporâneos, concentradas na função jurisdicional, dirigidas a enfrentar o reconhecido impasse entre propostas de expansão e contenção da atuação judicial no contexto de efetivação de direitos sociais de caráter distributivo. / This work analyses the so-called legal indeterminacy problem, in order to make explicit the kind of theoretical issues it engenders and to assess the scope or fecundity of the answers such issues make possible, especially in terms of the discussion of institutional assumptions underlying the organization of the adjudicative function. In this setting, the central claim of this work is that the theoretical potential of the idea of legal indeterminacy, limited to the adjudicative realm and understood mainly as a linguistic phenomenon, has been worn out, and that the acknowledgment of this result should lead to the investigation of ways in which ?legal indeterminacy? issues might be more productively treated as issues about institutional innovation than issues about the nature, or defects, of language. The exemplary works of Hans Kelsen, H.L.A. Hart, and Ronald Dworkin and the institutional assumptions underlying their thought, in connection with the indeterminacy problem, are reviewed, along with the writings of Lon L. Fuller dedicated to the assessment of alternative processes of social ordering, which are taken as a point of departure for exercises in institutional innovation. The possibility of such exercises is illustrated, at the end of this work, with specific innovation proposals by contemporary authors focused on the adjudicative job, dedicated to facing the theoretical deadlock between proposals for expanding and restricting the judicial role in the context of making welfare rights, of a distributive character, concrete

One of the greatest challenges facing the clothing industry worldwide, including South Africa is to provide well fitting garments to a broadly defined target population (Ashdown, Loker & Rucker 2007:1; Schofield, Ashdown, Hethorn, LaBat & Salusso 2006:147). Yu (2004:32) further states that from the consumers’ perspective, physical and psychological comfort as well as appearance play an important role in determining a well fitting garment and these are most likely to be shaped by the individual’s personal values. According to Kaiser (1998:290), personal values refer to standards or principles that guide an individual’s actions and thoughts that help to define what is important by guiding one’s choices or preferences of how the garment should fit. Hence garment fit and the subsequent appearance serves as a personal expression, communicating some personal values to others (Kaiser 1998:290) that can be achieved through the fitting of the garment. When female consumers encounter garment fit problems either through body shapes, garment sizing or garment size label communication, an emotional experience may result due to the failure to attain the personal values they are aiming to uphold or achieve. Cognitive appraisal theory of emotions is one of the theories among others that attempts to understand why people experience emotions. Lazarus (2001:55) defines cognitive appraisal theory of emotions as a quick evaluation of a situation with respect to one’s wellbeing. The answers to these evaluations directly cause the emotions experienced by a person. Since clothing can be used to express personal values to others (Kaiser 1998:146), the social standards appraisal dimension which can be one of the evaluative questions in the theory of cognitive appraisal concerning a situation, was the relevant evaluative component which this study focused on. This appraisal dimension evaluates whether the situation, in this case the negative experience of an ill-fitting garment affects what the consumer aspires to achieve socially through garment fit. Numerous studies such as Horwaton and Lee (2010); Pisut and Connell (2007) and Alexander, Connell & Presley (2005) on the garment fit problems from a consumer’s perspective have mostly been conducted in developed countries with limited research focusing on the consumers and their emotional experiences with garment fit. Understanding the factors that contribution to the garment fit problem currently being faced by female consumers in South Africa is an essential step in creating awareness of how this problem affects female consumers emotionally and the influence it has on their purchasing decisions. The purpose of this study is, therefore, to determine the female consumers’ personal values attributed to garment fit and to identify the emotions resulting from the perceptions of garment fit. This study predominantly employed an exploratory qualitative research approach. Data were collected from a purposive and convenient sample of 62 females from the UNISA – Florida Campus and King David High School in Victory Park in Johannesburg, South Africa through a self-administered questionnaire. Data on the demographic profile that included the ethnicity and age of the participants as well as data on the psychographic profile of the participants concerning frequently patronized clothing retailers, garment fit preferences and self-reported body shapes were collected through closed-ended questions. These data were analysed using the quantitative method of descriptive analysis. In addition to the psychographic profile of the most frequently patronized clothing retailer and garment fit preferences, participants were further requested to provide reasons as to why they mostly patronized the clothing retailer they ranked number 1, and to provide a reason for their preferred garment fit option. Content analysis, a qualitative method, was used to analyse the reasons provided by the participants for both these questions. Content analysis was also performed on additional information on body shape and garment sizing as well as data on garment size label communication. Furthermore, the means-end chain approach through the hard laddering exercises was used to explore and determine the female consumers’ personal values and emotions depicted through the perceptions of garment fit. Data from the hard laddering interviews on body shapes and garment sizing were carefully coded and categorized into attributes, consequences and personal values. Data were presented through the hierarchical value maps (HVMs) which were constructed through the software program Mecanalyst V 9.1. The analysis established that attributes such as quality of garments, various garment styles, availability of sizes, and fashionable styles directed female consumers’ most frequented clothing retailers. These attributes seemed to be aligned with their personal values they seek when shopping for garments. The findings also showed that most female consumers in this study preferred semi-fitting pants, a blouse and garments in general, a reasonable number of the participants preferred tight-fitting pants (31%), and some participants preferred loose-fitting pants, a blouse and garments in general. The specific personal values such as the comfortability of the garment, modesty, cover-up perceived body shape “flaws” and slimming effect which female consumers in this study desire to achieved through clothing also influenced their garment fit preference. With regard to the perceived self-reported body shapes of the participants, the study reflected that the majority of the participants were triangular body shaped. The study further found that female consumers in this study have expectations of how a garment ought to fit their body. Their expectations seem to be shaped by certain personal values such as “confidence”, “freedom” or “look good” which they aspire to achieve through clothing and garment fit. However, due to variations in body shapes, problems of garment sizing they encounter when purchasing ready-to wear garments and the incorrect information communicated on the size labels or the lack thereof, the majority of the female consumers failed to achieve their personal values. As a result mainly negative emotions such as “frustrated”, “sad”, “confused” and “depressed” were expressed by the participants. With regards to the effect of the perceived garment fit on the purchasing decision, the study found that fit of the garment is an important determinant of making a purchase. However, where female consumers in this study showed an interest of purchasing, while aware of some fit problems, the study found that exceptional conditions such as the possibility of altering the garments and design features such as colours that would conceal their perceived “figure flaws, made it easier for them to decide to purchase. The study further highlighted that some participants only purchased their ready-to-wear garment at certain shops where their needs were catered for and only when they had enough time to try-on the garment they intend to purchase instead of relying on the garment sizing and garment size label communication. Where participants indicated they would not purchase a garment with fitting problems, the study found that some female consumers in this study copied the designs of the garments in the clothing retailers and had someone reproduce it for them, whilst a few female consumers refused to purchase a garment whose size label was incorrectly communicated. Lastly the study also revealed that most female consumers thought that body shape, garment sizing and garment size label communication contribute to garment fit problems female consumers are currently facing in South Africa. It is, therefore, recommended that clothing manufacturers consider the various body shapes in their garment charts, know the needs of their target market and also use uniform sizing and size labelling systems that are easily understood by consumers that purchase ready-to-wear garments from retailers in South Africa. / Life & Consumer Sciences / M. Sc. (Consumer Science)

One of the greatest challenges facing the clothing industry worldwide, including South Africa is to provide well fitting garments to a broadly defined target population (Ashdown, Loker & Rucker 2007:1; Schofield, Ashdown, Hethorn, LaBat & Salusso 2006:147). Yu (2004:32) further states that from the consumers’ perspective, physical and psychological comfort as well as appearance play an important role in determining a well fitting garment and these are most likely to be shaped by the individual’s personal values. According to Kaiser (1998:290), personal values refer to standards or principles that guide an individual’s actions and thoughts that help to define what is important by guiding one’s choices or preferences of how the garment should fit. Hence garment fit and the subsequent appearance serves as a personal expression, communicating some personal values to others (Kaiser 1998:290) that can be achieved through the fitting of the garment. When female consumers encounter garment fit problems either through body shapes, garment sizing or garment size label communication, an emotional experience may result due to the failure to attain the personal values they are aiming to uphold or achieve. Cognitive appraisal theory of emotions is one of the theories among others that attempts to understand why people experience emotions. Lazarus (2001:55) defines cognitive appraisal theory of emotions as a quick evaluation of a situation with respect to one’s wellbeing. The answers to these evaluations directly cause the emotions experienced by a person. Since clothing can be used to express personal values to others (Kaiser 1998:146), the social standards appraisal dimension which can be one of the evaluative questions in the theory of cognitive appraisal concerning a situation, was the relevant evaluative component which this study focused on. This appraisal dimension evaluates whether the situation, in this case the negative experience of an ill-fitting garment affects what the consumer aspires to achieve socially through garment fit. Numerous studies such as Horwaton and Lee (2010); Pisut and Connell (2007) and Alexander, Connell & Presley (2005) on the garment fit problems from a consumer’s perspective have mostly been conducted in developed countries with limited research focusing on the consumers and their emotional experiences with garment fit. Understanding the factors that contribution to the garment fit problem currently being faced by female consumers in South Africa is an essential step in creating awareness of how this problem affects female consumers emotionally and the influence it has on their purchasing decisions. The purpose of this study is, therefore, to determine the female consumers’ personal values attributed to garment fit and to identify the emotions resulting from the perceptions of garment fit. This study predominantly employed an exploratory qualitative research approach. Data were collected from a purposive and convenient sample of 62 females from the UNISA – Florida Campus and King David High School in Victory Park in Johannesburg, South Africa through a self-administered questionnaire. Data on the demographic profile that included the ethnicity and age of the participants as well as data on the psychographic profile of the participants concerning frequently patronized clothing retailers, garment fit preferences and self-reported body shapes were collected through closed-ended questions. These data were analysed using the quantitative method of descriptive analysis. In addition to the psychographic profile of the most frequently patronized clothing retailer and garment fit preferences, participants were further requested to provide reasons as to why they mostly patronized the clothing retailer they ranked number 1, and to provide a reason for their preferred garment fit option. Content analysis, a qualitative method, was used to analyse the reasons provided by the participants for both these questions. Content analysis was also performed on additional information on body shape and garment sizing as well as data on garment size label communication. Furthermore, the means-end chain approach through the hard laddering exercises was used to explore and determine the female consumers’ personal values and emotions depicted through the perceptions of garment fit. Data from the hard laddering interviews on body shapes and garment sizing were carefully coded and categorized into attributes, consequences and personal values. Data were presented through the hierarchical value maps (HVMs) which were constructed through the software program Mecanalyst V 9.1. The analysis established that attributes such as quality of garments, various garment styles, availability of sizes, and fashionable styles directed female consumers’ most frequented clothing retailers. These attributes seemed to be aligned with their personal values they seek when shopping for garments. The findings also showed that most female consumers in this study preferred semi-fitting pants, a blouse and garments in general, a reasonable number of the participants preferred tight-fitting pants (31%), and some participants preferred loose-fitting pants, a blouse and garments in general. The specific personal values such as the comfortability of the garment, modesty, cover-up perceived body shape “flaws” and slimming effect which female consumers in this study desire to achieved through clothing also influenced their garment fit preference. With regard to the perceived self-reported body shapes of the participants, the study reflected that the majority of the participants were triangular body shaped. The study further found that female consumers in this study have expectations of how a garment ought to fit their body. Their expectations seem to be shaped by certain personal values such as “confidence”, “freedom” or “look good” which they aspire to achieve through clothing and garment fit. However, due to variations in body shapes, problems of garment sizing they encounter when purchasing ready-to wear garments and the incorrect information communicated on the size labels or the lack thereof, the majority of the female consumers failed to achieve their personal values. As a result mainly negative emotions such as “frustrated”, “sad”, “confused” and “depressed” were expressed by the participants. With regards to the effect of the perceived garment fit on the purchasing decision, the study found that fit of the garment is an important determinant of making a purchase. However, where female consumers in this study showed an interest of purchasing, while aware of some fit problems, the study found that exceptional conditions such as the possibility of altering the garments and design features such as colours that would conceal their perceived “figure flaws, made it easier for them to decide to purchase. The study further highlighted that some participants only purchased their ready-to-wear garment at certain shops where their needs were catered for and only when they had enough time to try-on the garment they intend to purchase instead of relying on the garment sizing and garment size label communication. Where participants indicated they would not purchase a garment with fitting problems, the study found that some female consumers in this study copied the designs of the garments in the clothing retailers and had someone reproduce it for them, whilst a few female consumers refused to purchase a garment whose size label was incorrectly communicated. Lastly the study also revealed that most female consumers thought that body shape, garment sizing and garment size label communication contribute to garment fit problems female consumers are currently facing in South Africa. It is, therefore, recommended that clothing manufacturers consider the various body shapes in their garment charts, know the needs of their target market and also use uniform sizing and size labelling systems that are easily understood by consumers that purchase ready-to-wear garments from retailers in South Africa. / Life and Consumer Sciences / M. Sc. (Consumer Science)