1,721,007 research outputs found
P and PS data to reduce unvertainity in the reconstruction of near-surface alluvial deposits (case study-Central Italy)
Full text linkGeophysical data in the reconstruction and Characterization of Plio-Quaternary sediments
No full textErt and PS- wave in the reconstruction of sediemntary valley(L'Aquila)
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
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
Secondary root canal treatment. When, how and why
No full textOBJECTIVES Endodontic retreatment procedures are increasing in clinical practice. The re-treatment aims to maintain a previous-ly treated tooth in which a periapical lesion is detected. Retreatment procedures should remove the previous filling material, provide an effective instrumentation and irrigation of the canal and provide a stable obturation and tooth reconstruction. These procedures are often complex and time consuming. The purpose of this Module is to describe the current endodontic retreat-ment techniques trying to identify their advantages and clinical limitations. MATERIALS AND METHODS The main causes of endodontic retreat-ment are considered, through the de-scription of the endodontic microbiolo-gy and the types of periapical lesions that can be observed in non-healed root canal treatments. The morphology of the endodontic canal after second instrumentation is described and some strategies are considered to remove the old filling material. RESULTS The conditions of endodontic retreat-ment are mainly due to the reinfection of the endodontic space, which can oc-cur due to coronal contamination (loss of the coronal seal) or to the presence of bacterial populations in areas of the canal not instrumented. Some bacteria, such as Treponema denticola and Por-phiromonas gingivalis, are highly pathogenic and are able to systemical-ly spread and reach different anatomi-cal districts, such as the heart, spleen, liver, and brain. One of the main problems of retreat-ment techniques is the possibility of pushing the infected debris of the ma-terial contained in the canal beyond the apex. These infected debris are respon-sible for acute post-operative pain and acute inflammatory phenomena. Ultrasonic instruments can support traditional manual instrumentation techniques and enhance the effect of the ir-rigants. Reciprocating instrumentation techniques can be used in the removal of the obturation material and in the instrumentation of the root canal. Secondary treatment can be surgically performed (endodontic surgery) where coronal access to the endodontic system is not feasible. Endodontic surgery shows high long-term success and survival rates in recent studies. CONCLUSIONS Endodontic retreatment still remains a complex and time consuming tech-nique. The use of ultrasonic instrumen-tation and reciprocating techniques al-low for better removal of the obturation material and a more effective instru-mentation of the canal. Retrograde endodontic surgery is a useful technique for maintaining the endodontical-ly treated element. CLINICAL SIGNIFICANCE The identification of a new periapical lesion, the non-healing and its exacer-bation in an endodontically treated element is attributable to the non-eradica-tion of pathogenic bacteria, or to a new reinfection of the canal space. For this reason, material removal, irrigation and instrumentation techniques play an important role in endodontic retreatment
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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