1,721,060 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
Abachi Regionali della Regione Lazio per gli studi di Livello 2 di Microzonazione Sismica: casi applicativi
No full textUbiquitin ligases MuRF1 and MAFbx in human skeletal muscle atrophy.
No full textUbiquitin ligases MuRF1 and MAFbx in human skeletal muscle atrophy
Luigi de Palma*, Mario Marinelli, Matteo Pavan, Alessandro Orazi
Cattedra di Ortopedia e Traumatologia, Universita` Politecnica delle Marche, Azienda Ospedaliero-Universitaria,
Ospedali Riuniti di Ancona, Via Conca, Torrette, 60100 Ancona, Italy
Received 29 January 2007; accepted 17 April 2007
Abstract
Introduction: Several pathological conditions can induce skeletal muscle atrophy and seem to share common enzyme pathways. In catabolic
states where proteolysis is increased, two genes specific to muscle atrophy, MuRf1 and MAFbx, are upregulated. These encode ubiquitin ligases,
which bind to and mediate ubiquitination of myofibrillar proteins for subsequent degradation during muscle atrophy.
Methods: Fifteen patients undergoing leg amputation were divided into two groups. Group A included 12 elderly patients (mean age 79 years)
amputated for vascular disease (complicated by diabetes in four), chronic osteomyelitis or squamous cell carcinoma. Group B included three car
accident victims (mean age 32 years) amputated due to acute arterial insufficiency. Gastrocnemius muscle biopsies were collected for a histochemical
and immunohistochemical (anti-MuRf1, anti-MAFbx) study.
Results: Group A specimens showed a decreased cross-sectional fiber area and length, adipose tissue replacement, and MuRf1 and MAFbx immunoreactivity.
Muscle cells showed MuRf1 and MAFbx subsarcolemmal immunoreactivity and weak extracellular matrix immunoreactivity.
Group B samples exhibited mild muscle structural changes; they did not stain with anti-MuRf1 or anti-MAFbx, and neither did sections showing
muscle degeneration and adipose tissue replacement.
Discussion: Results of our preliminary study showed upregulation of MuRf1 and MAFbx in atrophied muscle and support their role as regulatory
peptides in various conditions that lead to muscle atrophy. Data suggest that the study of cellular pathways can help identify promising targets for
effective new treatments for skeletal muscle atrophy.
Conclusion: The treatment of several orthopedic conditions is complicated by muscle atrophy; potential treatments could be directed to specific
sites where these proteins are localized
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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