1,720,980 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
Evaluation of short- and long-term outcome of 85 perineal hernia repair surgeries, assessing the overall recurrence rate in unilateral and bilateral disease, and presenting the long-term outcome of the use of Fascia Lata Graft as a rescue technique
No full textDiplomarbeit - Veterinärmedizinische Universität Wien - 2023Das Ziel dieser retrospektiven Studie war es die Rezidivrate von unilateralen und bilateralen Perinealhernienreparaturen zu untersuchen. Unsere Hypothese ist, dass in unilateraler Hernie, therapiert mit unilateraler Reparatur, in höchstens 20 % der Fälle die Bildung einer neuen Hernie auf der gegenüberliegenden Seite auftritt. Außerdem präsentieren wir die kurz- und langfristigen Ergebnisse der Operationstechniken, Transposition des inneren Obturator Muskels und Transplantation der Fascia Lata zur Perinealhernienreparatur. Die Krankenakten von Patienten mit Perinealhernienreparaturen von Dezember 2005 bis Juni 2020 des veterinärmedizinischen Lehrkrankenhauses der Veterinärmedizinischen Universität Wien wurden ausgewertet und ergaben 85 Fälle. Rezidive und langfristige Ergebnisse wurden mittels Krankenakten und einer telefonischen Umfrage kontrolliert. Mithilfe deskriptiver Statistik wurden die Ergebnisse ausgewertet. Insgesamt wurden 122 Perinealhernienreparaturen evaluiert. Bilaterale Operationen wurden als zwei Reparaturen gezählt. In Zahlen waren 48/122 (56.5 %) Reparaturen unilateral und 37/122 (43.5 %) bilateral. Von 108/122 Reparaturen konnte ein langfristiges Follow-up erhalten werden. Zugunsten unserer Hypothese war die totale Rezidivrate 16.7 %. Bei 6/44 (13.6 %) Operationen mit unilateraler Reparatur und 12/64 (18.8 %) bilateralen Reparaturen entwickelte sich ein Rezidiv. Bei 4/44 (9.1 %) unserer Patienten mit unilateraler Reparatur entwickelte sich eine neue Hernie auf der nicht operierten, kontralateralen Seite. Es gab 103/122 Transpositionen des inneren Obturator Muskels und 13/122 Transplantationen der Fascia Lata. Die restlichen 6/122 wurden mithilfe anderer Operationstechniken behandelt. Wir haben langfristiges Follow-up von 90/103 Transpositionen des inneren Obturator Muskels und von allen 13 Transplantationen der Fascia Lata. Die durchschnittliche langfristige Follow-up Zeit von der Transposition des inneren Obturator Muskels war 36,1 Monate (1–87 Monate) und von der Transplantation der Fascia Lata 20,8 Monate (1–61 Monate). Die Transpositionen des inneren Obturator Muskels hatten 15/90 Rezidive (16.7 %) und die Transplantationen der Fascia Lata hatten 1/13 (7.7 %) Rezidiv. Bei 62/85 Patienten wurde ein zweistufiges Verfahren durchgeführt, bei welchen zuerst eine Kastration gemeinsam mit einer Zysto-, Samenleiter29 und/oder Kolopexie vorgenommen wurde, und etwa zwei Wochen später die Perinealhernienreparatur. Zusammenfassend zeigt unsere Studie eine geringe Anzahl von kontralateraler neuer Hernienbildung bei unilateraler perinealer Hernie, welche einseitig repariert wurde. Dies deutet darauf hin, dass der Gedanke einer Perinealhernie als bilaterale Erkrankung mit prophylaktischer bilateraler Reparatur, bei jedem Patienten überdacht werden sollte.Diploma thesis - University of Veterinary Medicine Vienna - 2023The objective of this retrospective study was to report the recurrence rate of unilateral and bilateral perineal hernia repair with the hypothesis that recurrence in unilateral hernia treated with unilateral repair, affects the contralateral side at the most in 20 % of cases, ultimately resulting in a new hernia formation on this previously judged normal side. In addition, we present the shortand long-term outcome of the operation techniques internal obturator muscle transposition and fascia lata graft for perineal hernia repair. Evaluation of medical records of patients with perineal hernia repair from December 2005 until June 2020 of the veterinary teaching hospital of the University of veterinary medicine Vienna, Austria, yielded 85 patients. Recurrence and long-term outcome were assessed via medical records and a telephone survey. Descriptive statistics were used to evaluate the findings. A total of 122 procedures were evaluated, each bilateral surgery was counted as two procedures. 48 (56.5 %) surgeries were unilateral and 37 (43.5 %) were bilateral. From 108/122 procedures, long-term follow-up was obtained. The total recurrence rate was 16.7 % which supports our hypothesis. Six/44 (13.6 %) procedures with unilateral repair and twelve/64 (18.8 %) procedures with bilateral repair developed a recurrence. Four/44 (9.1 %) of our patients with unilateral perineal hernia repair displayed a new hernia formation on the unoperated contralateral side. There were 103/122 internal obturator muscle transposition and 13/122 fascia lata graft procedures with long-term follow-up from 90/103 internal obturator muscle transposition and from all 13 fascia lata graft procedures. The average long-term follow-up time for internal obturator muscle transposition was 36.1 months (range 1–87months) and for fascia lata graft 20.8 months (range 1–61 months). Internal obturator muscle transposition had 15/90 (16.7 %) and fascia lata graft had one/13 (7.7 %) recurrences. Sixty-two/85 patients underwent two-step procedures involving first castration and cysto-, vas deferens- and/or colopexy and approximately two weeks later the hernia repair. In conclusion, our study revealed a low number of contralateral new hernia formation in unilateral perineal hernia treated unilaterally. This indicates reconsideration of the thought of perineal hernia as bilateral disease with prophylactic bilateral repair in every patient
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
Computerisierte Messung der nukleären Pleomorphie mittels künstlicher Intelligenz als prognostisches Kriterium bei caninen Lungenkarzinomen
No full textDiplomarbeit - Veterinärmedizinische Universität Wien - 2024Nukleäre Pleomorphie (Variation der Zellkerngröße, u/o -form) ist ein prognostisches Malignitätskriterium im aktuellen Grading-System caniner Lungenkarzinome (cPC) und wird durch PathologInnen mittels eines dreistufigen Klassifizierungssystem eingeschätzt. Diese visuelle Graduierung ist anfällig für eine relevante Inter-observer Variabilität. Quantitativere Ansätze (manuelle Morphometrie) sind zeitaufwendig und somit impraktikabel. Wir haben einen Deep Learning-Algorithmus entwickelt, der die Zellkerne segmentiert und ihre morphometrischen Eigenschaften bewertet, um diese Limitationen zu überwinden. Die Bewertung der nukleären Pleomorphie wurde anschließend mit Schätzungen von PathologInnen und anderen etablierten prognostischen Tests verglichen und der prognostische Wert in cPC untersucht. Das Segmentierungsmodell wurde mittels eines Basisdatensatzes (27.138 annotierte Zellkerne in 43 cPC) entwickelt und validiert. Um die Genauigkeit des Modells und seine prognostische Fähigkeit zu beurteilen, wurde das Modell anschließend auf einen separaten Ergebnisdatensatz (46 cPC-Fälle mit verfügbarem Follow-Up) angewandt. Die Kernfläche (SD of area) zeigte eine gute Trennschärfe für das tumorspezifische Überleben, mit einer AUC von 0,80 und einer Hazard Ratio (HR) von 3,38 für die algorithmische Morphometrie. Zusätzlich zeigte die SD der Solidität, als Maß für die Unregelmäßigkeit der Kernform, ein vielversprechendes prognostisches Potenzial (AUC von 0,82). Die Schätzungen der PathologInnen ergaben HR-Werte zwischen 0,86 und 34,8, mit einer geringen Reproduzierbarkeit (k = 0,204) zwischen den BeobachterInnen. Andere prognostische Tests zeigten keine diskriminatorische Fähigkeit. Automatisierte Morphometrie verspricht eine zeiteffiziente und reproduzierbare Bewertung der nukleären Pleomorphie, die im Vergleich zu herkömmlichen Tests einen hohen prognostischen Wert hat. Eine Verfeinerung des Algorithmus, insbesondere im Hinblick auf die Untersegmentierung, und die Anwendung auf eine größere Studienpopulation sind in Zukunft gerechtfertigt.Diploma thesis - University of Veterinary Medicine Vienna - 2024Nuclear pleomorphism (variation in size, i.e., anisokaryosis, and/or shape) is a relevant malignancy criterion in canine pulmonary carcinoma (cPC) used in the current grading system. It is estimated by pathologists using a three-tier classification, presumably leading to relevant interobserver variability. A more quantitative approach (manual morphometry) is timeconsuming and therefore impractical. Measuring previously segmented nuclei provided by automated morphometry may overcome these limitations. We developed a deep learningbased algorithm and compared its assessment of nuclear pleomorphism to pathologists estimates and other prognostic tests, as well as the prognostic value of automated morphometry in cPC. A segmentation model was developed and tested using a ground truth dataset (27,138 annotated nuclei from 43 cPC). Subsequently, its performance was assessed on a separate outcome dataset consisting of 46 cPC cases with available follow-up information, evaluating the model’s accuracy and prognostic ability. Nuclear area (SD of area) showed good discriminative ability for tumor-specific survival, with an area under the curve (AUC) of 0.80 and hazard ratio (HR) of 3.38 for algorithmic morphometry. SD of solidity, reflecting shape irregularity, showed promising prognostic potential (AUC of 0.82). Pathologists\u27 estimates resulted in HR values from 0.86 to 34.8, with slight (k = 0.204) interobserver reproducibility. Other prognostic tests revealed no discriminatory ability. Automated morphometry promises a time efficient and reproducible assessment of nuclear pleomorphism that has a high prognostic value compared to conventional prognostic tests. Further refinement of the algorithm, particularly to address undersegmentation, and application to a larger study population are required in the future
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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