1,721,053 research outputs found
The DASE Design Environment for Distributed Real-Time Analysis
No full textIn this paper we discuss a set of design tools aimed at the scheduling analysis of distributed real-time systems. The toolset consists of a designer, a schedulability analyzer and an emulator. The designer allows the description of both the software architecture (at the concurrency abstraction level) and the hardware architecture, in terms of the basic objects that are relevant to real-time analysis. The user can specify timing constraints of the most general form. The tool assists in the binding of the software components into the hardware architecture, the selection of the resource management policies assigned to each hardware and software component and the (possible) deadline partitioning process (where needed by the analysis). The schedulability analyser can eventually guarantee the schedulability of the application tasks and the emulator can simulate sample system runs in order to predict the average case behavior and understand the critical scheduling sequences. Finally, we discuss the possibility of providing UML extensions in order to perform the same kind of real-time analysis in UML-compliant modeling tools
Analysis of temperature distribution in a surface water jet by means of infrared thermography
No full textThe DASE Tool: An Environment for the Development of Real-Time Applications
Full text linkIn this paper we discuss some design issues related to the handling of timing constraints in embedded systems and present a tool for the analysis of timing constraints at the architectural design level. Most design tools for real-time applications do not perform any kind of real-time analysis and do not allow the definition of explicit timing constraints. Our tool is aimed at real-time schedulability and performance analysis. It guides the decomposition of the application architecture into a set of hierarchical abstractions representing the active components and the cooperation among them (messages and/or use of shared resources). Deadlines can be specified between any couple of events. The real-time schedulability analysis requires a sufficiently accurate description of the (hardware) architecture, the mapping of the software components on the application nodes and the choice of the resource management algorithms
Un’indagine sperimentale sui flussi oscillanti in presenza di macroscabrezze di fondo
No full textVengono presentati i risultati di una indagine sperimentale finalizzata all’analisi degli effetti di macroscabrezze di fondo su flussi puramente oscillanti. L’indagine sperimentale si inserisce nel filone delle ricerche finalizzato alla comprensione dei meccanismi idrodinamici che si sviluppano nello strato limite in ambiente costiero, dove il fondale è caratterizzato dalla presenza di vegetazione sommersa e substrati rocciosi capaci di modificare in maniera significativa il campo di moto rispetto al caso di flusso indisturbato e, quindi, di influenzare gli equilibri locali che regolano i fenomeni di trasporto solido. L’indagine sperimentale è stata condotta per flussi puramente oscillanti e le macroscabrezze di fondo sono state modellate mediante l’impiego di cilindri disposti trasversalmente alla direzione del moto medio. L’applicazione della tecnica Feature Tracking ha consentito di determinare con elevata risoluzione spaziale e temporale le traiettorie del fluido. Inoltre sono stati ricostruiti l’andamento temporale delle velocità nell’outer - flow ed i profili delle velocità medie in fase tra due elementi cilindrici, mostrando gli effetti operati da questi ultimi sul campo di moto
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
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
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