1,721,172 research outputs found
Caractérisation des transitions temporisées dans les logs de conversation de services Web (version longue)
Full text linkLa connaissance du protocole de conversation d’un service Web est importante, pour les utilisateurs et les fournisseurs de services car il en modélise le comportement externe. Cependant, ce protocole n’est souvent pas spécifié pendant la conception. Notre travail s’inscrit dans une thématique d’extraction du protocole de conversation temporisé d’un service existant à partir de ses données d’exécution (logs). Nous en étudions un sous-problème important qui est la découverte des transitions temporisées, i.e. la recherche des changements d’états liés à des contraintes temporelles. Nous présentons un cadre formel regroupant différents concepts, dont les expirations propres, qui représentent pour les logs ce que sont les transitions temporisées dans le protocole de conversation. A notre connaissance, ceci représente la première contribution à la résolution de ce problème
Dynamic task assignment in workflows
No full textA method of assigning resources to nodes in a workflow. In one embodiment, a plurality of nodes are defined. Each of the nodes is a task to be executed within the workflow. In the present embodiment, resources are defined to perform the execution of the nodes. In the present embodiment, a set of data items is stored. The stored data items comprise variables pertaining to workflow execution in the workflow. In the present embodiment, those defined resources are assigned to execute each of the nodes, according to a set of rules. In the present embodiment, the set of rules is for controlling the execution of the workflow
Workflow Evolution
No full textA basic step towards flexibility in workflow systems is the consistent and effective management of workflow evolution, i.e. of changing existing workflows while they are operational. One of the most challenging issue is the handling of running instances when their schemata are modified: simple solutions can be devised, but they often imply losing all the work done or failing in capturing the advantages offered by workflow modifications; this is unacceptable for many applications. In this paper we address the problem of workflow evolution, from both a static and a dynamic point of view. We define a complete, minimal, and consistent set of modification primitives that allow modifications of workflow schemata and we introduce a taxonomy of policies to manage evolution of running instances when the corresponding workflow schema is modified. Formal criteria are introduced, based on a simple workflow conceptual model, in order to determine which running instances can be transparently migrated to the new version. A case study, relating the assembling of a desktop computer, will exemplify the introduced concepts
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
Online Group-Exercises for Older Adults of Different Physical Abilities
No full textIn this paper we describe the design and validation of a virtual fitness environment aiming at keeping older adults physically and socially active. We target particularly older adults who are socially more isolated, physically less active, and with less chances of training in a gym. The virtual fitness environment, namely Gymcentral, was designed to enable and motivate older
adults to follow personalised exercises from home, with a (heterogeneous) group of remote friends and under the remote supervision of a Coach. We take the training activity as an opportunity to create social interactions, by complementing training features with social instruments. Finally, we report on the feasibility and effectiveness of the virtual environment, as well as its
effects on the usage and social interactions, from an intervention study in Trento, Ital
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
Conceptual Modeling of WorkFlows
No full text. Workflow management is emerging as a challenging area for databases, stressing database technology beyond its current capabilities. Workflow management systems need to be more integrated with data management technology, in particular as it concerns the access to external databases. Thus, a convergence between workflow management and databases is occurring. In order to make such convergence effective, however, it is required to improve and strengthen the specification of workflows at the conceptual level, by formalizing within a unique model their "internal behavior" (e.g. interaction and cooperation between tasks), their relationship to the environment (e.g. the assignment of work task to agents) and the access to external databases. The conceptual model presented in this paper is a basis for achieving convergence of workflows and databases; the workflow description language being used combines the specification of workflows with accesses to external databases. We briefly indicate ho..
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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