Anytime Algorithms for Solving Possibilistic MDPs and Hybrid MDPs

The ability of an agent to make quick, rational decisions in an uncertain environment is paramount for its applicability in realistic settings. Markov Decision Processes (MDP) provide such a framework, but can only model uncertainty that can be expressed as probabilities. Possibilistic counterparts of MDPs allow to model imprecise beliefs, yet they cannot accurately represent probabilistic sources of uncertainty and they lack the efficient online solvers found in the probabilistic MDP community. In this paper we advance the state of the art in three important ways. Firstly, we propose the first online planner for possibilistic MDP by adapting the Monte-Carlo Tree Search (MCTS) algorithm. A key component is the development of efficient search structures to sample possibility distributions based on the DPY transformation as introduced by Dubois, Prade, and Yager. Secondly, we introduce a hybrid MDP model that allows us to express both possibilistic and probabilistic uncertainty, where the hybrid model is a proper extension of both probabilistic and possibilistic MDPs. Thirdly, we demonstrate that MCTS algorithms can readily be applied to solve such hybrid models.

A relação entre a acreditação/certificação da qualidade e o controlo interno nas organizações: estudo de caso em 30 unidades hospitalares públicas portuguesas

Dissertação de Mestrado apresentado ao Instituto de Contabilidade e Administração do Porto para a obtenção do grau de Mestre em Auditoria, sob orientação de: Doutora Alcina Dias e coorientação de: Doutora Ana Paula Lopes

À la convergence des savoirs : la transmission des connaissances entre des Atikamekw et des archéologues

Ce mémoire s’intéresse à la relation entre des archéologues et des Atikamekw de la communauté de Wemotaci, située en Haute-Mauricie. Cette relation est abordée sous l’angle de la transmission des savoirs. En effet, archéologues et Amérindiens possèdent des systèmes de connaissances distincts et c’est de la dynamique de rencontre entre ces deux corpus de savoirs dont il est ici question. Contrairement à ce que décrit généralement la littérature, les différences de conceptions à divers niveaux comme le rapport au passé, au territoire ou à l’objet n’empêchent pas une reconnaissance mutuelle des savoirs entre les archéologues et les Atikamekw. Chacun des groupes acquiert et intègre même les connaissances de l’autre selon ses préoccupations et ses besoins. Cette transmission des connaissances ne se limite pas à l’échange entre les archéologues et les Atikamekw, elle a également eu lieu entre les différentes générations amérindiennes. À travers une histoire où se conjuguent colonisation, éducation et sédentarisation, les savoirs des Atikamekw se trouvent au cœur du changement. C’est ainsi que la pratique archéologique peut devenir un moyen pour mettre en valeur des connaissances autochtones en permettant une rencontre intergénérationnelle sur un terrain de fouilles archéologiques. Enfin, dans un contexte où les nations autochtones désirent participer à tout ce qui concerne la protection de leur patrimoine culturel, l’archéologie peut également devenir un outil de réappropriation culturelle.

The legality of online Privacy-Enhancing Technologies

L’utilisation d’Internet prend beaucoup d’ampleur depuis quelques années et le commerce électronique connaît une hausse considérable. Nous pouvons présentement acheter facilement via Internet sans quitter notre domicile et avons accès à d’innombrables sources d’information. Cependant, la navigation sur Internet permet également la création de bases de données détaillées décrivant les habitudes de chaque utilisateur, informations ensuite utilisées par des tiers afin de cerner le profil de leur clientèle cible, ce qui inquiète plusieurs intervenants. Les informations concernant un individu peuvent être récoltées par l’interception de données transactionnelles, par l’espionnage en ligne, ainsi que par l’enregistrement d’adresses IP. Afin de résoudre les problèmes de vie privée et de s’assurer que les commerçants respectent la législation applicable en la matière, ainsi que les exigences mises de l’avant par la Commission européenne, plusieurs entreprises comme Zero-knowledge Systems Inc. et Anonymizer.com offrent des logiciels permettant la protection de la vie privée en ligne (privacy-enhancing technologies ou PETs). Ces programmes utilisent le cryptage d’information, une méthode rendant les données illisibles pour tous à l’exception du destinataire. L’objectif de la technologie utilisée a été de créer des systèmes mathématiques rigoureux pouvant empêcher la découverte de l’identité de l’auteur même par le plus déterminé des pirates, diminuant ainsi les risques de vol d’information ou la divulgation accidentelle de données confidentielles. Malgré le fait que ces logiciels de protection de la vie privée permettent un plus grand respect des Directives européennes en la matière, une analyse plus approfondie du sujet témoigne du fait que ces technologies pourraient être contraires aux lois concernant le cryptage en droit canadien, américain et français.

Exploration tools in formal concept analysis

The development of conceptual knowledge systems specifically requests knowledge acquisition tools within the framework of formal concept analysis. In this paper, the existing tools are presented, and furhter developments are discussed.

Beyond the Prototypical Male Migrant

The primary theoretical accounts of migration have been largely unaffected by the feminisation of migration. But this does not mean that they are gender neutral. Drawing on the concept of gender knowledge developed by German sociologists Irene Dölling and Sünne Andresen, on the feminist critique of knowledge, feminist economics and studies on gender and migration, the paper interrogates two influential models of migration from neoclassical economics for their gendered assumptions: the Roy-Borjas selection model of migration and Jacob Mincer’s model of family migration. An analysis of their gendered assumptions about the individual, the family, the institution of the labour market and immigration policies shows that both theories explicitly and implicitly assume a male migrant as the norm and frame female migrants as passive dependents. However, the paper argues that it is not “men as such” who serve as prototypical migrants, but a specific type of white, heterosexual and middle-class masculinity, which is set as the norm while other migration realities and knowledge about the structuration of migration processes through social relations of gender, race and class are excluded. Finally, it is argued that with knowledge being a powerful site for the production of meaning in social relations, the gender knowledge in mainstream migration theories could lead to discriminatory migration policies and might also affect migrant subjectivities. This underscores the need for a more sustained dialogue between feminist and mainstream migration scholarship to further engender the field.

La administración es algo más que gerencia

Este artículo tiene como propósito presentar una concepción de administración que va más allá de la noción moderna en la que se considera como profesión justificada sólo en el marco de lo práctico y lo útil, negando sus posibilidades especulativas y filosóficas, así como su avance científico de manera autónoma y original. El influjo de este imaginario determinó para la administración serios vacíos epistémicos y éticos, que condujeron al surgimiento de un debate que actualmente ha llevado a repensar los sistemas de generación de saber y de procesos pedagógicos y andragógicos. La polémica ha permitido comprender que tal pragmatismo disciplinar debe ser reformulado, mediante la incorporación de la dirección y el pensamiento estratégico, como la base y el soporte de la disciplina.

Ergonomía. Fundamentos para el desarrollo de soluciones ergonómicas

En este texto se presentan algunos conceptos y marcos teóricos útiles para el análisis del trabajo en ergonomía. El objetivo es mostrar los conceptos de base para el estudio del trabajo en la tradición de la ergonomía de la actividad, y analizar de manera general algunos de los modelos empleados para el análisis de una actividad de trabajo. Inicialmente se abordan los principios teóricos de la ergonomía y los principios que provienen de la fisiología, la biomecánica, la psicología y la sociología; también se presentan los acercamientos metodológicos empleados en esta misma perspectiva para el análisis de actividades de trabajo. Se parte del principio de que un estudio ergonómico del trabajo se puede llevar a cabo desde una doble perspectiva: la perspectiva analítica y la perspectiva comprensiva.

A new voice in a new place: musical encounters with a difference

Australian education providers at the university level are being challenged to be more inclusive of cultural diversity and associated knowledge systems in their curricula. This article reports on some findings of a research study that aimed to evaluate the introduction of African music to primary teacher education students and to provide them with a context for assimilating African music into their own teaching practice. This paper reports on my work as a music educator in sharing my different worlds of experience ‘with one voice’ in order to expand students’ local knowledge base. It also discusses the nature and applications of African music and demonstrates some aspects that correlate with Western music. Through a study of both Western and African pedagogies and repertoire, students were able to gain a more holistic perspective of the role of music in society and were able to contextualize and transfer epistemological and pedagogical insights from one society to another.

Picturing Currere : envisioning-experiences within learning

Currere reconceptualises curriculum as understanding learning experiences. This paper outlines potentials for pictures in re-envisioning currere for a world growing in complexity.
Vision, as the privileged sense for acquiring knowledge, is often regarded deterministically - seeing is believing. But, as sophisticated technology becomes more significant in the control of knowledge systems - as 'reality' becomes more virtual - personal visual experiences are becoming harder to generate, interpret and authenticate. Knowledge technology is increasing exposure to 'mediated messages' and diminishing the ability to validate them. I see this as problematic for the authenticity of learning within a world that is intensifying in its complexity.
My work reaches beyond determinist/technological views of learning to explore envisioning-experiences within learning. I am particularly interested in ways that enacting with pictures embodies individuals, communities, and the world within understandings of complexity and authenticity. In practical terms, this involves interactively and reflexively 'doing pictures' as a personal process in learning for deeper understanding.
The paper explores three issues:
* Text and pictures: learning, thinking, and knowing, as textual dominions that marginalise pictures.
* Enactivism and learning: an approach to learning for complex communities that embodies mindful thinking within haptic experiences.
* Enactive picturing: laying a personal processual path with learning that complexifies understandings for authenticating experiences - doing-walking-talking - with pictures.

Rhizo-textual analyses of educational policy documents

In this paper, I describe methodological applications of Deleuze and Guattari's (1987) understanding of rhizomatic knowledge systems. I draw on rhizo-textual analyses of two different policy documents used in Australia to direct teachers in their teaching of English in primary (elementary) schools.

A rhizo-textual analysis is not concerned with following traditional, scientifically rigorous channels through a study; from data collection, through analysis, to findings that report some objectively discovered truth. Rather, a rhizo-textual analysis is a mapping of connections, of the fleshy tubers that are the rhizome. The mapping draws on various, and often contradictory work, ideas and concepts. What would seem to be "disparate phenomena" enables me to "connect diverse fragments of data in ways that produce new linkages and reveal discontinuities" (Alvermann, 2000, p. 118).

As Deleuze and Guattari point out, "A rhizome ceaselessly establishes connections between semiotic chains, organizations of power, and circumstances relative to the arts, social sciences, and social struggles" (1987, p. 7). This ceaselessness of the connections between rhizomes shifts attention away from the construction of a particular reading of any text towards a new careful attendance to the multiplicity of linkages that can be mapped between any text and other texts, other readings, other assemblages of meaning. Elizabeth Grosz describes rhizomatic texts as "a process of scattering thoughts, scrambling terms, concepts and practices, forging linkages, becoming a form of action" (1995, p. 126)

Within the policy texts I have analysed, this scrambling and scattered process establishes connections between disparate discursive systems, about literacy, about texts, about students and how students learn, and about teaching so that the version of literacy teaching that is produced seems to be normative, to be unquestionably rational, and therefore to be beyond critique.

Arlathirnda ngurkarnda ityirnda: being-knowing-doing: de-colonising indigenous tertiary education

Veronica Arbon is currently Professor and Chair in Indigenous Knowledge Systems at Deakin University. She has succeeded in delineating and elaborating on the dialects of coloniser- colonised interaction in tertiary education in a way that expands our understanding and opens many new questions and avenues of inquiry.