Key to reinforcement learning in multi-agent systems is the ability to exploit the fact that agents only directly influence only a small subset of the other agents. Such loose couplings are often modelled using a graphical model: a coordination graph. Finding an (approximately) optimal joint action for a given coordination graph is therefore a central subroutine in cooperative multi-agent reinforcement learning (MARL). Much research in MARL focuses on how to gradually update the parameters of the coordination graph, whilst leaving the solving of the coordination graph up to a known typically exact and generic subroutine. However, exact methods { e.g., Variable Elimination { do not scale well, and generic methods do not exploit the MARL setting of gradually updating a coordination graph and recomputing the joint action to select. In this paper, we examine what happens if we use a heuristic method, i.e., local search, to select joint actions in MARL, and whether we can use outcome of this local search from a previous time-step to speed up and improve local search. We show empirically that by using local search, we can scale up to many agents and complex coordination graphs, and that by reusing joint actions from the previous time-step to initialise local search, we can both improve the quality of the joint actions found and the speed with which these joint actions are found.
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In Social Work research there is a strong debate on the distinctiveness and methodological quality, and how to address the dilemma of rigour and practice relevance. Given the nature of Social Work the field has developed a characteristic research culture that puts emphasis on giving voice to service users and disseminating research knowledge in practice, especially in a stream of so called practice-based research. However, there is no consensus on how to best contribute to the practice of Social Work through research and at the same time producing rigourous scientific outcomes, resulting in methodological pluralism. Studying the perceptions of Social Work researchers on their role, the aims and values of Social Work research and their research approach, provides insight into the methodological pluralism of Social Work research. Thirty-four professors specialising in practice-based Social Work research participated in a Q methodology study. Q methodology combines qualitative and quantitative methods. It helped reveal and describe divergent views as well as consensus. The analysis led to the identification of three differing viewpoints on Social Work research, which have been given the following denominators: The Substantiator, The Change Agent and The Enlightener. The viewpoints provide researchers in the field of Social Work with a framework in which they can position themselves in the methodological pluralism. Researchers state that the viewpoints are helpful in clarifying perspectives on good research, facilitate the discourse on methodological choices to further develop and strengthen Social Work research as a scientific discipline
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From the introduction: "There are two variants of fronto-temporal dementia: a behavioral variant (behavioral FTD, bvFTD, Neary et al. (1998)), which causes changes in behavior and personality but leaves syntax, phonology and semantics relatively intact, and a variant that causes impairments in the language processing system (Primary Progessive Aphasia, PPA (Gorno-Tempini et al., 2004). PPA can be subdivided into subtypes fluent (fluent but empty speech, comprehension of word meaning is affected / `semantic dementia') and non-fluent (agrammatism, hesitant or labored speech, word finding problems). Some identify logopenic aphasia as a FTD-variant: fluent aphasia with anomia but intact object recognition and underlying word meaning."
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Competitive advantage is probably the most popular business concept today (Mooney, 2007). This article aims to investigate critically the discourse on competitive advantage, as expressed by business literature, by locating its meanings in the public higher education sector. This research reveals that people working within the HEIs have given broader and more diversified meanings to this concept, which are partly due to the message received from external environment, and partly because of the influence of professional settings in which they function. By studying these diversified meanings, 13 elements are identified in constructing the competitive advantages of higher education institutions. Furthermore, the importance of each element is rated and ranked which enables us to assess the quantitative significance. The clarification of this container concept “competitive advantage” leads to the conclusion that the business way of defining of competitive advantage should be critically reviewed and verified in the context of public higher education sector, because the competition in the public education market is different from the normal market competition defined by the business literature.
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This study explores how non-executive directors are challenged by management while they seek to improve the effectiveness of supervisory boards in the Netherlands. A combination of semi-structured interviews and a questionnaire among non-executive directors indicates that supervisory board members mainly experience boardroom challenges in three core areas: the ability of non-executive directors to ask management critical questions, information asymmetries between the management and supervisory boards and the management of the relationship between individual executive and non-executive directors. The qualitative in-depth analysis reveals the complexity of the main contributing factors to problems in the boardroom as well as the range of process and social interventions non-executive directors use to address boardroom issues. The findings highlight the need to better understand boardroom processes and the need of non-executive directors to carefully manage relationships in and around the boardroom.
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This study investigated to what degree lesson-to-lesson variability in teachers' goal clarification and process feedback explains variability in secondary students’ motivational correlates. Students (N=570, 24 classes) completed questionnaires at six occasions. Multilevel regression analyses showed that relations between perceived process feedback and experienced need satisfaction (i.e., competence, autonomy and relatedness) were conditional on perceived goal clarification. No such interaction effects between process feedback and goal clarification were found for need frustration (i.e., experiencing failure, feeling pushed to achieve goals, feeling rejected). In general, when students perceived more process feedback or goal clarification, students experienced more competence, autonomy and relatedness satisfaction. Yet, when perceiving very high levels of process feedback, additional benefits of goal clarification were no longer present (and vice versa). In lessons in which students perceived goals to be less clear, they experienced more need frustration. No associations were found between process feedback and need frustration.
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Paperbijdrage conferentie EARLI SIG 14, 11-14 september 2018, Genève Although professional performance at the workplace is essential in VET, little is known about what educators do when assessing students’ performance. This study aims to explore how workplace educators inform their judgements of students’ performance by looking at strategies and potentially influencing factors.
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Symposiumbijdrage conferentie EARLI SIG 14, 11-14 september 2018, Genève Learning across the contexts of school and the workplace is highly relevant to the VET-sector. This contribution analyses these cross-contextual learning processes with three key issues in mind: (1) guidance by vocational educators, (2) assessment of students’ development and (3) design of VET-learning environments. Guidance, assessment and overarching VET-curriculum designs form the basis for constructive alignment as an approach to optimize conditions for high quality cross-contextual learning processes. We used the theoretical framework of boundary crossing to clarify the complex, multilevel nature of these key issues.
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Paperbijdrage conferentie EARLI SIG 14, 11-14 september 2018, Genève Universities of Applied Sciences (UAS) that offer Professional Studies (PS) are required to educate students to become starting professionals with research competence, that enable them to deal with challenging tasks that professionals face in a dynamic knowledge society (e.g. Heggen, Karseth, & Kyvik, 2010). To assess professional and research competence, students at UAS in the Netherlands mostly develop a professional product for an external bidder as their graduation project. The professional product is an artefact that is ideally representative for students’ future professions within a specific domain, e.g. a strategic advice within the economic domain (e.g. Losse, 2016). Due to the integrative and complex character of this task, supervision is essential and we thus need to understand what expertise supervisors need and which are good pedagogic strategies. However, little is known about graduation project supervision at UAS. This literature review aims at providing knowledge about graduation project supervision and at revealing what further inquiry on graduation project supervision should aim at, by answering the following questions: 1. What expertise do supervisors need and what is known about pedagogic strategies in graduation project supervision at UAS? 2. What should further inquiry after graduation project supervision at UAS aim at?
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Posterbijdrage conferentie EARLI SIG 14, 11-14 september 2018, Genève Although literature shows the important supportive role of experienced colleagues to stimulate novices’ workplace learning, the question of how this support is provided is usually answered in general terms (e.g. Mikkonen et al. 2017; Tynjälä 2008). Therefore, this study aims to explore how members of vocational communities, both individually and as a collective, enact specific pedagogic practices to contribute to novices’ learning. The systematic literature review that will be presented in the interactive poster session is the first study of a PhD project and provides an overview of situational pedagogic practices which attempt to support novices’ learning at the workplace.
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