1,720,972 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
A new technique for preparing cadavers using PMMA: Rat and mouse example
Get PDFBackground: Polymethyl methacrylate is a member of the acrylic polymer family with superior optical properties. It is used in dentistry, hospital incubators, lenses, and various surgical fields, especially ortho-pedics. In this preliminary study, we aimed to prepare cadavers using the industrial form of polymethyl methacrylate.Methods: The new technique consists of fixation, washing, purification, impregnation, and polymerization. For the study, two whole rat bodies, two rat front legs and two rat hind legs, one half rat body, two whole mouse bodies, and all internal organs were used. Wistar albino rats and BALB/c mice were used. After the cadaver samples were fixed and washed, they were passed through an alcohol series starting from 50%, completing the purification process. In the next step, a solution was prepared by mixing 100 ml of Thinner into 1000 ml of a mixture containing styrene, methyl methacrylate, and Co(II)2-ethyl hexanoate. The samples were immersed in the solution under negative pressure (from 10 mmHg to 400 mmHg), allowing the samples to absorb the solution thoroughly. They were then treated with methyl ethyl ketone peroxide and the polymerization step was terminated.Results: The cadaver samples obtained using polymer were hard, they maintained the given shape, and showed a relatively transparent quality. The production of these materials took 35 days, excluding fixation. The tissue samples were odorless in the process after polymerization. Also, there was no decay in the samples after the production stage and they could be stored under room conditions.Conclusion: This study determined that cadavers could be prepared using polymethyl methacrylate and methyl ethyl ketone peroxide. The polymer used here cost about $5. The cadavers can be safely exhibited in room conditions for five years without requiring special conditions like pools or cold storage. Further re-search should compare this technique with the plastination technique in terms of texture, color, weight, application time, and cost.(c) 2022 Elsevier GmbH. All rights reserved
Variations on the Author
Get PDF“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
Get PDFWe 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
Geleneksel bir tekniğin gelişimi: Medial malleol kırıklarının tedavisinde 4 mm’lik kanüllü vida ve Kirschner teli tekniği ile 4 mm’lik kanüllü vida, Kirschner teli tekniği ve kayma önleyici mini plak tespitinin karşılaştırılması
Get PDFBACKGROUND: In this study, we aimed to compare a 4-mm lag screw and Kirschner wire technique versus a 4-mm lag screw and Kirschner wire (K-wire) technique with additional miniplate fixation for the treatment of medial malleolar fractures. METHODS: A total of 23 patients who were diagnosed with isolated fractures of the medial malleolus and operated in our center were retrospectively analyzed. The patients were divided into two groups: Group A, medial malleolar fracture fixed with a 4-mm cannulated screw and a K-wire (n=11) and Group B, a 4-mm cannulated screw and K-wire used for fixation with miniplate fixation for extra stability (n=12). Clinical outcomes were assessed using the American Orthopaedic Foot and Ankle Society (AOFAS) Ankle-Hind foot Score at 2, 6, 12, and 24 months postoperatively. At 12-24 months, the presence of pain and tenderness in the medial malleolus with palpation was evaluated using the visual analog scale (VAS) pain scores. RESULTS: The mean time to union was 2.23 +/- 0.56 (range, 1.8-2.9) months in Group A and 2.46 +/- 0.45 (range, 1.9-3.1) months in Group B, indicating no statistically significant difference between the two groups (p 0.01). However, there was no statistically significant difference in the mean AOFAS scores at 6 and 12 months between the groups (p 0.05). The mean VAS pain scores at 12-24 months postoperatively did not significantly differ between the groups (p>0.05). CONCLUSION: Our study results suggest that the treatment of medial malleolar fractures with a cannulated screw and K-wire with additional stabilization using a miniplate ensures favorable early outcomes with early return to daily living activities. However, both techniques have similar outcomes in the mid-term
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Alkid resin metoduyla hazırlanan wistar ratlarının müze-sergi ve eğitim materyali olarak kullanımı
Get PDFAlkyd Resin method, patented by the Turkish Patent Institute, is a cadaver preparation and preservation technique. This study examines whether exhibition-museum materials can be produced from rat cadavers processed with alkyd resin method in different postures and whether dissection and suturing can be performed on the samples. Besides, samples prepared with alkyd resin and samples prepared freshly were compared in terms of dissection and suturing. 14 Wistar Albino Rats were used in the study. Seven were prepared with alkyd resin method and the others were freshly prepared for comparison in terms of suturing and dissection. The alkyd resin method was applied to two cadavers as a pretrial and to five cadavers for them to be museum-exhibition and educational materials. Alopecia was detected in two cadavers. In some of the exhibition samples processed with the method mentioned, shrinkage and hardening of the skin was noticed. All the samples prepared with this method became products suitable for suturing and dissection. The exhibition-museum materials prepared with the alkyd resin method have maintained their first body postures. We believe that alkyd resin method can be applied to the entire body, and the products can be used for exhibition and educational purposes. Furthermore, the method should be further popularized, and it should be applied to cadavers of different species so that its applicability increases.Scientific and Technological Research Council of Turkey [TUBITAK] [215O580]This study was supported by Scientific and Technological Research Council of Turkey [TUBITAK] (Project No: 215O580
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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