1,721,558 research outputs found
Strain Energy Release Rates of Modified ENF Specimen for Mixed Mode Fracture
No full textA modified ENF specimen for the mixed-mode fracture test is analyzed by the finite element method. The analysis is performed to calculate the mode I and mode II strain energy release rates and to compare the results with those obtained by the simple beam theory. The virtual crack closure method and displacement extrapolation method are employed in the finite element analysis to calculate the strain energy release rates. As for the relation between G<sub>1<> G<sub>1<> and the thickness ratio for the modified ENF specimen, the finite element result shows some discrepancy with the result by the simple beam theory. The results of present analysis show that the mode partitioning by the simple beam theory does not hold good for the specimen with different thicknesses of upper and lower arms.(Author abstract
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
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
A framework supporting dynamic workflow interoperation
No full textWhen a workflow process spans to multiple organizations, subprocess task model is an efficient way of representing remote services of other systems. The subprocess task usually represents a single service in conventional workflows. However, if a subprocess task comprises multiple services, and the number of services and the execution flow of the services cannot be decided until run-time, conventional ways of workflow design is not proper to handle such situations efficiently. All potentially reachable paths should be known at process build time in conventional workflow design. However, such an assumption does not always hold in real situations. In this paper, we propose a multi-subprocess task based framework for dynamic workflow interoperations. In the framework, we develop the multi-subprocess task model to handle a subprocess composed of multiple services that are unknown at process build time. In this paper, we also define and implement four components to support the dynamic workflow interoperation: Workflow engine, Adapter, Service Interface Repositories (SIRs), and XML messages. Adapter and SIR make a local WfMS transparent to the location and platform of the interoperating WfMSs by encapsulating external subprocesses and superprocesses. When an example scenario is implemented and evaluated in the proposed framework, the advantages of the framework are obvious in terms of automaticity, adaptability, and efficiency
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
Communication deadlock detection of inter-organizational workflow definition
No full textAs the needs for interconnections of processes in different companies or departments are so increasing and companies try to realize business processes across organizational boundaries, the correctness issues of inter-organizational workflow definition is getting more important. In this paper, we develop community process definition language(CPDL) for inter-organizational workflow specification. It is devised to analyze correctness of inter-organizational workflow definition and especially it is used to detect latent communication deadlocks. A new communication deadlock detection technique in the context of interorganizational workflow definition is developed on CPDL using the set based constraint system. Any inter-organizational workflow languages that can be translated into CPDL can detect its communication deadlock using the technique of this paper
Set-based access conflict analysis of concurrent workflow definition
No full textAn error-comprising workflow definition might provoke serious problems to an enterprise especially when it is involved with mission critical business processes. Concurrency of workflow processes is known as one of the major sources causing such an invalid workflow process definition. So the conflicts caused by concurrent workflow processes should be considered deliberately when defining concurrent workflow processes. If we can analyze the conflicts immanent in concurrent workflow definition prior to runtime, it will be very helpful to business process designers and many other users of workflow management systems. In this paper, we propose a set-based access conflict analysis method to detect all the possible access conflicts prior to the execution of the workflow process, The method is composed of two phases. In the first phase, it generates set constraints from a structured workflow definition. In the second phase, it solves the set constraints obtained from the first phase. Using the information about potential conflicts detected by our analysis, workflow designers can prevent the serious problems that can be raised by conflicts in runtime and they can convince whether their workflow definitions are free from such conflicts or not. (C) 2001 Published by Elsevier Science B.V
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