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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
Birmingham News sleeve BN0028581
No full textAnnual dinner / Birmingham District Zionist Organization of America / Pinetree Country Club / Albert Rosenbaum / Karl B. Friedman / Moshe Gilboa / [Work order included
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
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The joint imputed Poisson distribution and its application to minimum cost maintenance scheduling
No full textSophisticated electrical systems generally have circuit breakers designed to avert extensive damage by shutting the system down in the event of power surges. One such example is the network employed by electric utility companies to provide power to their customers. Circuit breakers, installed at various locations along the network, protect sensitive electrical units from random overload due to lightning strikes.When a circuit breaker has unknowingly worn out, a subsequent lightning strike produces a very costly "blackout," causing considerable damage to and a lengthy repair time for the system. There are only two ways to discover a non-functioning circuit breaker; either by suffering a blackout, or by detecting it during periodic testing. Maintenance costs for checking, and when necessary, replacing worn out circuit breakers must be balanced against the potentially more expensive costs of blackouts.The problem is modeled as two interrelated Poisson processes. We define the random variable M as the number of lightning strikes (imputing process with observable occurrences) and N as the number of circuit breaker failures (imputed process with occurrences that cannot be observed) which occur during the time period (0,).General formulas for the Joint Imputed Poisson Distribution P(m,n;) and Conditional Imputed Poisson Distribution P(nm;) are motivated and proven. The thesis also develops expressions for both marginal distributions, P(m;) which is simple Poisson, and P(n;) the Imputed Poisson Distribution. Computational efforts, complete with computer graphics, reveal the general behavior of these distributions for selected values of their parameters. In addition, exact expressions for the expectations, variances, and covariance of the number of occurrences in the interrelated processes are also derived.The thesis concludes with a determination of the optimal period \tau\sp* between circuit breaker maintenance checks that minimizes the total expected cost per unit time on (0,\tau\sp*). While it is in general impossible to derive a closed form expression of \tau\sp*, we demonstrate that the expected total cost per unit time is a unimodal function of Then an iterative procedure to obtain \tau\sp*, based on Newton's Method, is detailed.</p
The joint imputed Poisson distribution and its application to minimum cost maintenance scheduling
No full textSophisticated electrical systems generally have circuit breakers designed to avert extensive damage by shutting the system down in the event of power surges. One such example is the network employed by electric utility companies to provide power to their customers. Circuit breakers, installed at various locations along the network, protect sensitive electrical units from random overload due to lightning strikes.When a circuit breaker has unknowingly worn out, a subsequent lightning strike produces a very costly "blackout," causing considerable damage to and a lengthy repair time for the system. There are only two ways to discover a non-functioning circuit breaker; either by suffering a blackout, or by detecting it during periodic testing. Maintenance costs for checking, and when necessary, replacing worn out circuit breakers must be balanced against the potentially more expensive costs of blackouts.The problem is modeled as two interrelated Poisson processes. We define the random variable M as the number of lightning strikes (imputing process with observable occurrences) and N as the number of circuit breaker failures (imputed process with occurrences that cannot be observed) which occur during the time period (0,).General formulas for the Joint Imputed Poisson Distribution P(m,n;) and Conditional Imputed Poisson Distribution P(nm;) are motivated and proven. The thesis also develops expressions for both marginal distributions, P(m;) which is simple Poisson, and P(n;) the Imputed Poisson Distribution. Computational efforts, complete with computer graphics, reveal the general behavior of these distributions for selected values of their parameters. In addition, exact expressions for the expectations, variances, and covariance of the number of occurrences in the interrelated processes are also derived.The thesis concludes with a determination of the optimal period \tau\sp* between circuit breaker maintenance checks that minimizes the total expected cost per unit time on (0,\tau\sp*). While it is in general impossible to derive a closed form expression of \tau\sp*, we demonstrate that the expected total cost per unit time is a unimodal function of Then an iterative procedure to obtain \tau\sp*, based on Newton's Method, is detailed.</p
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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