1,721,339 research outputs found
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
Effetto dei trattamenti termici sulle proprietà meccaniche e sul comportamento a frattura della lega di Al a356 thixocolata’
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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
Modeling Environments for Exploration of Business Dynamics within P-LEO Constellation Markets
Full text linkDue to recent investments in the space industry, companies have begun to further explore the business feasibility for space-based systems. This rapidly expanding space resources economy includes proliferated low Earth orbit (P-LEO) satellite constellations which provide a variety of services such as broadband internet and telemetry to a diverse set of customer types, for multiple use cases. Although constellation operators hope this service is a financially lucrative business, uncertain market conditions coupled with limited resources create a techno-economic environment in which large capital expenditure and competition reduce the likelihood of profitability. Strategic development of P-LEO constellations is a central pillar that links orbital dynamics of constellations to downstream business performance. Since different constellation development strategies can lead to business success or failure, understanding the environment in which P-LEO constellations are developed is of paramount importance for any such business endeavors to be profitable.
When considering factors such as space debris, competition, socio-economic variations, and geographical demand, this becomes an even more challenging environment to navigate. Although comparisons of P-LEO constellations have been performed and individual constellation designs have been critiqued, modeling competitive business dynamics and complex resource management strategies involving such large space systems have not been fully explored. To study these complex interactions and understand how satellite internet business strategies evolve with environment complexity, business environments with varying levels of modeling fidelity are created.
Two different approaches are taken to model the complex P-LEO constellation environment: dynamic programming and gamification. A discrete, deterministic grid world formulation is used to develop simplified satellite communications business environments which utilize dynamic programming to generate optimal strategies. Such strategies gleaned from this environment demonstrate several concepts such as: optimal timing of investments, coupling of design variables with actions, and optimal resource allocations. However, this environment is limited in terms of modeling elements and strategy complexity, so a gamified, multi-agent environment is also developed. Using a mixture of gamification and modeling, the environment is constructed as a multi-player, real-time-strategy (RTS) simulation game to simulate business competition between constellation operators. This expanded environment provides opportunities to explore competitive and cooperative strategies in a high dimensional environment.
As modeling fidelity increases, solving for an optimal strategy becomes increasingly infeasible. This is due to two factors: the rapid increase of the P-LEO environment's dimensionality and the increased complexity of processes modeled within the environment. Through qualitative comparisons of environments and investigations between action couplings, we can understand the dynamical, agent-environment system of P-LEO constellation markets at different levels of complexity
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