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One Place (one + place)
Selected AbstractsPurpose-Based Expert Finding in a Portfolio Management SystemCOMPUTATIONAL INTELLIGENCE, Issue 4 2004Xiaolin Niu Most of the research in the area of expert finding focuses on creating and maintaining centralized directories of experts' profiles, which users can search on demand. However, in a distributed multiagent-based software environment, the autonomous agents are free to develop expert models or model fragments for their own purposes and from their viewpoints. Therefore, the focus of expert finding is shifting from the collection at one place as much data about a expert as possible to accessing on demand from various agents whatever user information is available at the moment and interpreting it for a particular purpose. This paper outlines purpose-based expert modeling as an approach for finding an expert in a multiagent portfolio management system in which autonomous agents develop expert agent models independently and do not adhere to a common representation scheme. This approach aims to develop taxonomy of purposes that define a variety of context-dependent user modeling processes, which are used by the users' personal agents to find appropriate expert agents to advise users on investing strategies. [source] Reterritorilizing the Relationship between People and Place in Refugee StudiesGEOGRAFISKA ANNALER SERIES B: HUMAN GEOGRAPHY, Issue 1 2001Cathrine Brun The article discusses different conceptions of space and place in refugee studies, especially contributions from anthropology and geography. A main distinction is drawn between two understandings of space and place; an essentialist conception, stating a natural relationship between people and places and an alternative conception attempting to de-naturalize the relationship between people and places. The consequences of applying different conceptions of space and place for the development of refugee policies and representations of refugees and displaced persons are addressed. For many displaced persons, displacement is experienced as being physically present at one place, but at the same time having a feeling of belonging somewhere else. It is argued that though attempts to de-naturalize the relationship between people and places have been important for how the refugee experience is conceptualized, there has been too much focus on imagination accompanied by a neglect of the local perspective of migrants and displaced people. In the local perspective of forced migration, the present lives of displaced people are emphasized. Especially the attitudes from the host communities, the policy environment that displaced people are part of, and their livelihood opportunities are the focus of regard. ,Territoriality' and ,reterritorialization' of the relationship between people and places are discussed as tools to analyse the local perspective of forced migration in general and the strategies of internally displaced persons and their hosts in Sri Lanka in particular. [source] Factors determining mammal species richness on habitat islands and isolates: habitat diversity, disturbance, species interactions and guild assembly rulesGLOBAL ECOLOGY, Issue 1 2000Barry J. Fox Abstract 1For over three decades the equilibrium theory of island biogeography has galvanized studies in ecological biogeography. Studies of oceanic islands and of natural habitat islands share some similarities to continental studies, particularly in developed regions where habitat fragmentation results from many land uses. Increasingly, remnant habitat is in the form of isolates created by the clearing and destruction of natural areas. Future evolution of a theory to predict patterns of species abundance may well come from the application of island biogeography to habitat fragments or isolates. 2In this paper we consider four factors other than area and isolation that influence the number and type of mammal species coexisting in one place: habitat diversity, habitat disturbance, species interactions and guild assembly rules. In all examples our data derive from mainland habitat, fragmented to differing degrees, with different levels of isolation. 3Habitat diversity is seen to be a good predictor of species richness. Increased levels of disturbance produce a relatively greater decrease in species richness on smaller than on larger isolates. Species interactions in the recolonization of highly disturbed sites, such as regenerating mined sites, is analogous to island colonization. Species replacement sequences in secondary successions indicate not just how many, but which species are included. Lastly, the complement of species established on islands, or in insular habitats, may be governed by guild assembly rules. These contributions may assist in taking a renewed theory into the new millennium. [source] Truth-Seeking, Truth-Telling, and Postconflict Peacebuilding: Curb the Enthusiasm?,INTERNATIONAL STUDIES REVIEW, Issue 3 2004David Mendeloff This essay evaluates popular and scholarly claims about the peace-promoting benefits of formal truth-telling and truth-seeking mechanisms in the aftermath of civil wars. Its purpose is twofold. First, it synthesizes and clearly articulates in one place the full range of claims about the relationship between truth-telling and peacebuilding. Second, it evaluates these claims by systematically examining the core factual and theoretical assumptions on which they are based. An argument is made that many such claims,and their core assumptions,are flawed or highly contentious as well as that truth-telling advocates claim far more about the power of truth-telling than logic or evidence dictates. This is not to say that truth-telling has no role to play in preventing the resumption of violent conflict in postwar societies, only that proponents likely overstate its importance. Before proclaiming the necessity of truth commissions or trials in the aftermath of violent conflict, we need to better understand how truth-telling prevents the recurrence of civil war, how important it is relative to other factors and other peacebuilding strategies, and when it is likely to prove helpful, harmful, or irrelevant. [source] Documents and queries as random variables: History and implicationsJOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE AND TECHNOLOGY, Issue 9 2006David Bodoff The view of documents and/or queries as random variables is gaining importance in the theory of information retrieval. We argue that traditional probabilistic models consider documents and queries as random variables, but that newer models such as language modeling and our unified model take this one step further. The additional step is called error in predictors. Such models consider that we don't observe the document and query random variables that are modeled to predict relevance probabilistically. Rather, there are additional random variables, which are the observed documents and queries. We discuss some important implications of this idea for parameter estimation, relevance prediction, and even test-collection construction. By clarifying the positions of various probabilistic models on this question, and presenting in one place many of its implications, this article aims to deepen our common understanding of the theories behind traditional probabilistic models, and to strengthen the theoretical basis for further development of more recent approaches such as language modeling. [source] Regional Cluster Policies: Learning by Comparing?KYKLOS INTERNATIONAL REVIEW OF SOCIAL SCIENCES, Issue 3 2002Jan Hospers This paper deals with an intriguing paradox that can be observed in today's regional economic policy making: whereas unique local factors are increasingly seen as the determinants of regional economic success, simultaneously more and more governments try to copy policy experiences that proved to be successful in a particular region. A good example here is the use of ,best practices' in the field of regional cluster policy. Cluster programs are becoming like ,mantras' for policy makers who want to stimulate regional economic development. Given this paradox, in the present paper we address the question what lessons can be drawn from comparing success stories of regional clustering. To answer this question, we combine insights from regional economics and comparative public policy. To start, we discuss the literature that has led to the popularity of the cluster concept as a learning device among policy makers. After that, we identify the preconditions (,contingencies') that affect whether these cluster policy initiatives can be transferred from one place to another. We find that some of the contingent influences, especially those related to the degree of uniqueness of an area's economic structure and culture, hamper the possibility of ,learning by comparing' in regional cluster policy. It may even be argued that exactly those regional specificities explain the success of cluster,based policy efforts. Thus, we have to draw the rather pessimistic conclusion that the possibilities of lesson,drawing in regional cluster policy are limited. In our view, at best ,best practices' should be seen as inspiration sources rather than as recipes for successful regional economic development. A preliminary version of this paper was presented at the CURE 3,Conference on Outstanding Regions in Leeuwarden, The Netherlands, November 22,24, 2000. We would like to thank Arnoud Lagendijk, an anonymous referee and the editors for valuable comments. [source] Manual transport in Parkinson's diseaseMOVEMENT DISORDERS, Issue 5 2003Blanka Hejduková MD Abstract We analyze hand dexterity in Parkinson's disease patients (PD) and control subjects using a natural manual transport task (moving an object from one place to another). Eight PD patients and 10 control subjects carried out the task repeatedly at maximum speed both in off and on medicated status. The movement parameters and the grip and load forces were recorded. Using the force and velocity signals, 10 subsequent phases of the transport movement were defined and their durations were measured. The difference between the control group and the test group in off and on was established statistically using non-parametric methods. There was slowed reaching and a striking disturbance of establishing the precision grip in PD. The transport capabilities were impaired differentially. Although acceleration and reaching sufficient height of the lift were disturbed in PD subjects, transport of the object toward the target position was almost normal. A partial disturbance was observed when cancelling the grip. Dopaminergic medication improved only specific hand skills, especially establishment of the precision grip and one of the four transport phases. A long movement path was more sensitive for movement disturbance in Parkinson's disease than a short one.© 2003 Movement Disorder Society [source] LIM kinase-2 targeting as a possible anti-metastasis therapyTHE JOURNAL OF GENE MEDICINE, Issue 3 2004Eigo Suyama Abstract Background Metastatic properties of tumors involve movement of cancerous cells from one place to another and tissue invasion. Metastatic cells have altered cell adhesion and movement that can be examined by in vitro chemotaxis assays. The Rho/ROCK/LIM kinase pathway is one of the major signaling pathways involved in tumor metastasis. It is involved in the regulation of the actin cytoskeleton. Using the randomized ribozyme library, we initially found that metastatic human fibrosarcoma cells harboring ribozyme specific for ROCK lose their metastatic properties. In this study, we have determined the effect of ribozymes specific for LIM kinase-2 on metastatic and proliferative phenotypes of human fibrosarcoma cells. Methods We attempted to target LIM kinase-2 (LIMK-2) expression by hammerhead ribozymes (Rz) in human metastatic fibrosarcoma cells. An effective ribozyme was selected based on the expression analysis. Cells were stably transfected with Rz specifically effective for LIMK-2 and were examined for metastatic and proliferative properties. Results Analyses of cellular phenotypes such as cell proliferation, cell migration and colony-forming efficiency revealed that the suppression of LIMK-2 expression in human fibrosarcoma cells limits their migration and dense colony-forming efficiency without affecting cell proliferation rate or viability. Conclusions Specific targeting of metastatic and malignant properties of tumor cells by LIMK-2 ribozyme may serve as an effective therapy for invasive tumors with minimum effect on the surrounding normal cells. Copyright © 2004 John Wiley & Sons, Ltd. [source] | ||||||||||||||||