1,721,105 research outputs found
Fluency - conoscere e usare l'informatica (quarta edizione)
No full textQuesto è un libro di informatica per non informatici, compresi gli studenti universitari che non studiano informatica.
L’informatica permea la nostra vita quotidiana, e questo libro vuole essere un approccio sistematico alla disciplina. Gli studenti a cui è diretto il libro sono i “nativi digitali”, che utilizzano quotidianamente gli strumenti dell’Information Technology ma che non ne hanno fatto l’oggetto dei loro studi.
Lo scopo di questo libro è quello di presentare uno schema concettuale che consenta di affrontare con agilità i vari aspetti dell’Information Technology. Si ritiene che un testo universitario non debba insegnare “a fare clic” qui o lì: questa è materia per i manuali di istruzioni. Piuttosto, una preparazione di tipo universitario dovrebbe dare gli elementi per capire cosa, e come, si possa fare per utilizzare con padronanza gli strumenti informatici.
Due sono gli obiettivi che questo libro si propone di raggiungere: sapere e saper fare. Sapere quali sono i concetti e le idee alla base dell’Information Technology permetterà al lettore di utilizzare gli strumenti informatici con padronanza e scioltezza. Saper fare è indispensabile per utilizzare con senso critico gli questi strumenti ed è complementare al sapere.
Questa, con ogni probabilità, sarà l’ultima edizione interamente cartacea del libro. Già ora sono disponibili on-line molti approfondimenti e l’evoluzione della tecnologia sembra andare verso una sempre più vasta diffusione dei libri in formato elettronico. Questo deve spaventare il lettore? No. Una volta imparati i concetti fondamentali, saprà come affrontare e utilizzare con naturalezza anche queste nuove tecnologie (e tutte quelle che si susseguiranno)
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 Compiler Abstraction for Machine Independent Parallel Communication Generation
No full textion for Machine Independent Parallel Communication Generation ? Bradford L. Chamberlain Sung-Eun Choi Lawrence Snyder Department of Computer Science and Engineering University of Washington Box 352350 Seattle, WA 98195-2350 Abstract. In this paper, we consider the problem of generating efficient, portable communication in compilers for parallel languages. We introduce the Ironman abstraction, which separates data transfer from its implementing communication paradigm. This is done by annotating the compiler-generated code with legal ranges for data transfer in the form of calls to the Ironman library. On each target platform, these library calls are instantiated to perform the transfer using the machine's optimal communication paradigm. We confirm arguments against generating message passing calls in the compiler based on our experiences using PVM and MPI --- specifically, the observation that these interfaces do not perform well on machines that are not built with a message passing c..
Regions: An Abstraction for Expressing Array Computation
No full textion for Expressing Array Computation Bradford L. Chamberlain E Christopher Lewis Calvin Lin y Lawrence Snyder University of Washington, Seattle, WA 98195-2350 y University of Texas, Austin, TX 78712 fbrad,echris,[email protected],[email protected] February 1, 1999 Abstract Most array languages, such as Fortran 90, Matlab, and APL, provide support for referencing arrays by extending the traditional array subscripting construct found in scalar languages. We present an alternative approach that exploits the concept of regions---a representation of index sets that can be named, manipulated with high-level operators, and syntactically separated from array references. This paper develops the concept of region-based programming and describes its benefits in the context of an idealized array language called RL. We show that regions simplify programming, reduce the likelihood of errors, and enable code reuse. Furthermore, we describe how regions accentuate the locality of array e..
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
- …
