1,720,964 research outputs found
Cysts of tempomandibular joint: diagnostical criteria and clinical aspects
No full textVedasi l'allegat
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
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
Effects of titanium brushes on different implant surfaces: an in vivo investigation
No full textBACKGROUND: Recently, rotating brushes with titanium bristles have been introduced for the debridement of implant surfaces when peri implant problems occur. This study inves- tigated the effects induced by titanium brushes on different implant surfaces previously contaminated in vivo METHODS: n°9 disks, going sterilized directly from manu- facturer, (Megagen Implant Co, Ltd, Korea) (n=3 with HA grit sandblasted RBM surface; n=3 with a Ca2+ incorporated in titanium XPEED surface and n=3 with machined surface) Ø 8mm x 3mm were used for this investigation. N°1 disk for each surface treatment (tot. n°3 disks) were characterized at time 0 by SEM to study the surface morphology and by AFM to study the surface roughness. The other six disks were mounted on an acrylic bite embedded in a buccal lateral posi- tion (three for each side) worn for 48 hours by a student from Dental School, for biofilm accumulation. After 48 hours each disk was removed and randomly assigned to the control group (to study only plaque accumulation) and to the test group (toinvestigate the effects of the cleaning procedure using tita- nium brushes). All disks were treated by the same operator. The Nickel-Titanium brushes (I.C.T. De Ore, Verona, Italy) were used (one for each disk treated) mounted on a handpiece at 500 rpm speed and 100 N torque for 60 sec time with a calibrated pressure of 25 gr and a continue irrigation of NaCl 0.9%. All disks were then analyzed by SEM at 40x, 500x and 2000x, also in backscattering, and by AFM for the Ra (medium value of roughness) and Rp-v (max peak-max depth value) measurement. All Ni-Ti brushes used were analyzed by SEM and compared to a no used one.
RESULTS: The MACHINED surface, after instrumentation, appeared well cleansed. However, the SEM images, revealed considerable surface alterations following treatment. The roughness values increased. The RBM surface showed a mini- mum percentage of residual material and after cleaning had some morphological changes. The typical RBM sandblasted structure appear flattened. The roughness values confirm this change by the reduction in value of R p-v. The cleaning effi- cacy of the brush on the XPEED surface was excellent but the surface morphology changed. The SEM images showed the presence of grooves and flattening caused by the use of brush that have eliminated most of the irregularities and of the peaks, confirmed by the roughness values measured. The EDX spectroscopy provided the evidence that part of the Ca ++ ions coating remains on the surface even after treatment. The statistical analysis shows that the Ra difference was statis- tically significant. (p<0.5) The brush used for Xpeed surface is the only one, among those used, that appeared more com- promised after its use. The bristles are very twisted. CONCLUSIONS: In conclusion we can say that the trial of toothbrushes NiTi has shown a good efficacy of cleansing on rough and smooth surfaces. The efficiency of the treatment was, however, accompanied by a visible change in the surface characteristics. While the machined surface at the end of treat- ment showed an increase of roughness values, the rough sur- faces undergo a flattening process with consequent decrease of the roughness measurements. Further studies will be needed to verify if and how these morphological changes will affect biological processes of healing
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