1,721,395 research outputs found
Connecting Visualization and Data Management Research (Dagstuhl Seminar 17461)
Full text linkThis report documents the program and the outcomes of Dagstuhl Seminar 17461 "Connecting Visualization and Data Management Research". Seminar November 12-17, 2017-http://www.dagstuhl.de/17461 What prevents analysts from acquiring wisdom from data sources? To use data, to better understand the world and act upon it, we need to understand both the computational and the human-centric aspects of data-intensive work. In this Dagstuhl Seminar, we sought to establish the foundations for the next generation of data management and visualization systems by bringing together these two largely independent communities. While exploratory data analysis (EDA) has been a pillar of data science for decades, maintaining interactivity during EDA has become difficult, as the data size and complexity continue to grow. Modern statistical systems often assume that all data need to fit into memory in order to support interactivity. However, when faced with a large amount of data, few techniques can support EDA fluidly. During this process, interactivity is critical: if each operation takes hours or even minutes to finish, analysts lose track of their thought process. Bad analyses cause bad interpretations, bad actions and bad policies. As data scale and complexity increases, the novel solutions that will ultimately enable interactive, large-scale EDA will have to come from truly interdisciplinary and international work. Today, database systems can store and query massive amounts of data, including methods for distributed, streaming and approximate computation. Data mining techniques provide ways to discover unexpected patterns and to automate and scale well-defined analysis Except where otherwise noted, content of this report is licensed under a Creative Commons BY 3.0 Unported licens
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
Functionally graded materials obtained by combustion synthesis techniques: A review
No full textAmong the large number of different techniques to produce Functionally Graded Materials (FGMs), Combustion Synthesis (CS) is gaining an increasing interest due to the possibility of achieving high-purity products in short processing times (typically of the order of few seconds or less), and with low energy consumption (limited to the ignition step), as well as low cost of the manufacturing equipment required. CS exploits high exothermic reactions between reactants, which, after reaching the ignition temperature, start to form the desired products and the reaction becomes self-sustaining, not requiring any other external energy contribution. Depending on the way of ignition, combustion synthesis can be conducted in the Self-propagating High-temperature Synthesis (SHS) mode or in the Thermal Explosion (TE) mode. In the SHS mode, the reaction is ignited at one end of the reactive sample and it self-propagates in the form of a combustion wave at very high velocities. In the TE mode (also known as reactive sintering or volume combustion synthesis) the whole volume of the sample is heated uniformly in a controlled manner until reaction takes place essentially simultaneously throughout the volume. The use of CS in FGMs manufacturing can benefit from the fast kinetics involved, allowing to create non equilibrium structures or to lead to products less prone to homogenization, thus preserving the gradient structure imparted during the forming step. Among the wide variety of possible ignition techniques, which will be discussed in the present review, recent results obtained by microwave (MW) irradiation will be presented, discussing the advantages of such a heating technique in FGMs manufacturing. MWs, in fact, can enhance the previously mentioned advantages due to their peculiarities of rapid, volumetric and selective heating, the latter particularly relevant when dealing with multi-phase systems. © 2012 by Nova Science Publishers, Inc. All rights reserved
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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