1,720,974 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
[Hysteroscopic vs histologic diagnosis. Study of 222 cases of abnormal uterine hemorrhage].
No full textAUB (abnormal uterine bleeding) is one of the most common pathologies. It is therefore important to use a method that is easy to carry out in order to ensure a rapid and reliable diagnosis. Hysteroscopy may represent the elective method for the study of the uterine cavity. A total of 222 women suffering from AUB were studied between January 1996 and June 1997 at the Department of Surgery, Gynecology Clinic of L'Aquila University. Their age ranged between 30 and 74 years old. The exclusion criteria for the study were as follows: presence of a genital infection in active or latent phase, pregnancy in progress or abortion. All patients underwent operative hysteroscopy with targeted biopsy accompanied, when necessary, by endometrial ablation. All biopsies underwent histological analysis and the results of hysteroscopic diagnosis and histological diagnosis were then compared. There was a 85% correspondence between results. The main difficulties were encountered in the identification and selection of the characteristics of hyperplasia. Moreover, during the study it was found that hysteroscopy was both diagnostic and also therapeutic since it enabled the removal of polyps and intracavitary fibroma or endometrial ablation if required. Hysteroscopy was therefore found to be a totally reliable method for the study of abnormal uterine bleeding compared to the histological tests carried out
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
Location, Location, Location
No full textIn the last decade, location and tracking of a mobile terminal (MT) in wireless communication networks has attracted a lot of attention. Historically, the need for pinpointing a mobile user arises as a matter of security, in order to track emergency calls made trough the US Enhanced 911 (E-911) service. Nevertheless, there are many other applications that make positioning techniques attractive for wireless service providers, such as mobile yellow pages, ''where I am'' applications, navigation services, location-sensitive billing, restaurant/hotel finders, mobile gaming, and so forth. Moreover, position location systems enhance public interest services, such as fleet management, roadside assistance, traffic routing and real-time vehicle scheduling. Real-time position location can also be used to track service personnel (e.g., police officers, rescue teams, fire brigades, etc.), lost children, suspected criminals and stolen vehicles. Finally, subscriber location positioning allows service providers to improve network design and yields resource optimization. For instance, spectral efficiency can be improved and a more effective radio resource management (RRM) can be obtained through channel allocation based on actual mobile user location. Among the many location systems proposed in the literature, the most effective are those based on radiolocation techniques that exploit measurements of physical quantities related to radio signals travelling between the MT and a given set of transceivers whose location is known, e.g. base stations (BSs) and/or navigation satellites. Radio signal measurements are typically the received signal strength (RSS), the angle of arrival (AOA), the time of arrival (TOA), and the time difference of arrival (TDOA). More recently, radio location algorithms based on a combination of the above location-related measurements have also been proposed. Such hybrid techniques guarantee a high-accuracy location, which is more and more required by value-added location-based services, as for example security applications and mobile gaming
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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