1,721,019 research outputs found
Adaptive Model of Multi-objective Agent Behavior in Real-Time Systems
No full textAgents trying to reach their goals in dynamical environments need to be adaptive. Adaptation rules can conflict and their combinations can complicate multi-agent systems development. Agent programs are becoming mostly problem-oriented and high-coupled, and that prevents the reuse of developed programs and their components. High-level generic planning algorithms can be used to adapt agent behavior to environment changes, but they also have high computational complexity, which limits their usefulness in real-time application. This paper considers a generic agent model that combines planning algorithms with utility theory to reach rational adaptive behavior, with acceptable performance and low component coupling. In the proposed model each agent has a dynamical set of tactical objectives associated with objects in environment. For each kind of objective the agent uses an objective-specific planning algorithm. To handle events from the environment the agent generates new objectives with a decision tree. Each objective has a dynamic priority calculated by heuristic function. The suggested model may improve performance in real-time environments by decreasing computational complexity. The effectiveness of the model is shown on mini-game example.</p
iCurate: A Research Data Management System
Full text linkScientific research activities generate a large amount of data, which varies in format, volume, structure and ownership. Although there are revision control systems and databases developed for data archiving, the traditional data management methods are not suitable for High Performance Computing (HPC) systems. The files in such systems do not have semantic annotations and cannot be archived and managed for public dissemination.
We have proposed and developed a Research Data Management (RDM)system, iCurate', which provides easy-to-use RDM facilities with semantic annotations. The system incorporates Metadata Retrieval, Departmental Archiving, Workflow Management System, Meta data Validation and Self Inferencing. The `i' emphasises the user-oriented design. iCurate will support researchers by annotating their data in a clearer and machine readable way from its production to publication for the future reus
Sketching the vision of a Web of Debates
No full textWeb users have changed the Web from a means for publishing and exchanging documents to a means for sharing their feelings, beliefs, and opinions and participating in debates on any conceivable topic. Current web technologies fail to support this change: arguments and opinions are uploaded in purely textual form; as a result, they cannot be easily retrieved, processed and interlinked, and all this information is largely left unexploited. This talk will sketch the vision of Debate Web, which will enable the extraction, discovery, retrieval, interrelation and visualisation of the vast variety of viewpoints that exist online, based on machine-readable representations of arguments and opinions
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Computing coalitions in Multiagent Systems: A contextual reasoning approach
Full text linkpeer reviewedIn multiagent systems, agents often have to rely on other agents to reach their goals, for example when they lack a needed resource or do not have the capability to perform a required action. Agents there- fore need to cooperate. Some of the questions then raised, such as, which agent to cooperate with, are addressed in the field of coalition formation. In this paper we go further and first, address the question of how to com- pute the solution space for the formation of coalitions using a contextual reasoning approach. We model agents as contexts in Multi-Context Sys- tems (MCS) and dependence relations among agents as bridge rules. We then systematically compute all potential coalitions using algorithms for MCS equilibria. Finally, given a set of functional and non-functional requirements, we propose ways to select the best solutions. We illustrate our approach with an example from robotics
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Using CIDOC-CRM to Model Hexi Regional Poetry
Full text linkRegional poetry is an important part of Chinese intangible cultural heritage; a characteristic example is the poetry of the Hexi Corridor, an important historical region with a rich poetry tradition located in the modern western Gansu province of China. In this paper, we present our work on an ontology-based model for Hexi regional poetry that captures historical and cultural information including poetic imageries and allusions, based on CIDOC-CRM and other standard Semantic Web ontologies. Our work lays the foundation for transforming digitised poetry into a knowledge graph and facilitating the research of the history and culture of the Hexi region.</p
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