1,720,967 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
Programmazione Concorrente e Distribuita
No full textIl libro si articola in tre parti distinte. La prima contiene i principali concetti che stanno alla base della programmazione concorrente e distribuita. Vengono inoltre presentate le principali problematiche introdotte dalla concorrenza, alla soluzione delle quali sono dedicati i successivi capitoli. Nell'introdurre i principali strumenti linguistici necessari per la specifica della concorrenza, vengono anche descritti i meccanismi offerti dal nucleo del Sistema Operativo necessari per fornire loro il supporto.
La seconda parte del libro è dedicata alla programmazione concorrente in senso stretto, cioè alla concorrenza all'interno di una architettura non distribuita. La terza parte , infine, è invece dedicata alla programmazione distribuita, cioè al caso in cui la concorrenza riguardi parti di uno stesso programma distribuite nell'ambito di un'architettura composta da macchine interconnesse tramite una rete di comunicazione
Sistemi Operativi. Seconda edizione
No full textIl libro è specificamente concepito come testo per un primo insegnamento sui sistemi operativi che rappresenta una parte essenziale di ogni corso di laurea in Ingegneria Informatica ed Informatica. Rispetto alla prima edizione il libro e' stato arricchito di un nuovo capitolo sulle problematiche di protezione e sicurezza e di due nuove appendici, una relativa al linguaggio dei comandi (shell) di Unix ed una relativa ai sitemi sommersi (embedded). Inoltre sono stati approfonditi alcuni argomenti chiave come ,per esempio, gli algoritmi di scheduling della CPU, le tecniche di gestione delle condizioni di stallo ed i sistemi operativi real-time
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
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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