1,720,975 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
Objective and quantitative evaluation of the femal breast region regarding reduction mammaplasty using three-dimesnional surface imaging
No full textDie 3-D Körperoberflächenerfassung mittels Oberflächenscanner bietet eine neue alternative Methode zur Dokumentation von Körperformveränderungen und gewinnt in diversen medizinischen Fachgebieten zunehmend an Bedeutung. Die möglichen Applikationen der industriellen Erkenntnisse der 3-D Technologie für die Brustchirurgie wurden in verschiedenen Arbeiten dargestellt. Ziel dieser Arbeit war es die weibliche Brustregion bei Mammareduktionsplastiken objektiv und quantitativ zu evaluieren. Die Möglichkeiten der 3-D Körperoberflächenerfassung zur Dokumentation postoperativer Veränderungen der Brustregion im Vergleich zum Ausgangsbefund unter Berücksichtigung der jeweils angewandten Operationstechnik hinsichtlich einer detaillierten Analyse der Form, Hautoberfläche, Volumen, und Symmetrie wurden untersucht. Das Patientenkollektiv dieser Studie umfasste 30 Frauen (n = 60 Brüste) unterschiedlichen Alters, die sich in der Abteilung für Plastische und Wiederherstellende Chirurgie am Klinikum rechts der Isar der Technischen Universität München einer Mammareduktionsplastik nach Höhler oder Lejour unterzogen. Die Brustregion der 30 Patienten wurde im Stehen mit gesenkten und hinter dem Rücken verschränkten Armen praeoperativ und 6 Monate postoperativ mit Hilfe eines Linearlaserscanners, Typ Minolta Vivid 910® (Konica Minolta Co, Ltd., Osaka, Japan) dreidimensional erfasst und computerunterstützt (Raindrop Geomagic Studio7®, Raindrop Geomagic, Inc., NC, U.S.A) zu virtuellen 3-D Modellen verarbeitet. Die weitere Analyse erfolgte anhand der virtuellen 3-D Modelle der Brustregion prae- und postoperativ hinsichtlich bestimmter linearer Messungen, Oberflächen- und Volumenmessungen, sowie die Untersuchung bestehender Asymmetrien anhand dieser erhobenen Daten der 3-D Brustmodelle für die beiden Operationstechniken getrennt. Die Symmetrieanalysen zeigten keine signifikanten Unterschiede zwischen der linken und rechten Brust prae- und postoperativ. Diese symmetrische Grundvoraussetzung ermöglichte die Erstellung von Berechnungsformeln zur Vorhersage des postoperativen Ergebnisses hinsichtlich spezifischer Streckenänderungen, Hautoberflächenänderungen und Resektionsvolumens für die jeweils verwendete Technik.
Mit Hilfe der 3-D Körperobeflächenerfassung sind objektive Quantifizierungsmöglichkeiten hinsichtlich der Form, Oberflächen- und Volumenveränderung bei Brustverkleinerungsoperationen möglich. Die vorgestellte Methode ist ausreichend genau und ermöglicht Symmetrieanalysen zu prae- und postoperativen Evaluierung der weiblichen Brustegion. Die Methode erlaubt die operativ vorgenommen Veränderungen in Korrelation zu setzen und praediktive Aussagen hinsichtlich des postoperativen Ergebnisses in Form von Formeln zur Berechnung vorzunehmender operativer Veränderungen zu tätigen. Angesichts der kleinen Fallzahl ist es sicherlich anzustreben diese Ergebnisse an einem größeren Patientenkollektiv zu validieren und auf seine klinische Aussagkraft weiterhin zu analysieren. Die innovativen Möglichkeiten der 3-D Technologie hinsichtlich einer verbesserten praeoperativen Operationsplanung und Qualitätssicherung lassen uns daran glauben, daß die 3-D Körperoberflächenerfassung zukünftig ein breites Anwendungspotential nicht nur in der Plastischen, Rekonstruktiven und Ästhetischen Chirurgie gewährleistet und eine evidenz-basierte Plastische Chirurgie ermöglichen könnte.The potential application of the industrial approved 3-D technology in breast surgery are presented in different publications. Main goal of this work is to analyze the postoperative changes of the female breast region regarding shape, surface, volume and symmetrie concerning differnet operation techniques. Three-dimensional surface imaging of the breast region was accomplished using a linear laser scanner and the 3-D virtual breast models were evaluated pre- and postoperative regarding linear measurements, surface measurements, volume measurements and symmetry with appropriate software for each surgical techique. Using 3-D surface imaging objective quantification ragarding shape, surface and volume changes regarding reduction mammaplasty are possible. Surgical changes can be correlated and prediction of the surgical result are possible using specific regression equotation
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
Three-dimensional assessment of breast shape changes in reduction mammoplasty
No full textZiel dieser Studie war die Evaluation der Qualität der dreidimensionalen Erfassung der weiblichen Brustregion mittels eines Oberflächen-Laserscanners, insbesondere in Hinsicht auf die Erfassung einer hypertrophen oder ptotischen Brust. Zu diesem Zweck wurde zunächst ein rigides Modell mit einem dreidimensionalen linearen Oberflächen-Laserscanner vom Typ Minolta Vivid 910 unter mehreren Versuchsbedingungen erfasst. Der daraus resultierende optimale Versuchsaufbau wurde anschlieβend an fünf Probandinnen angewendet, um menschliche Einflussfaktoren wie Bewegung und Atmung in die Evaluation einzubeziehen, wobei die besondere Aufmerksamkeit der Erfassung der submammaren Region galt. Insgesamt wurde eine akzeptierbare Präzision und Reproduzierbarkeit der Erfassung der weiblichen Brustregion erzielt. Somit erscheint diese Methode geeignet, um eine korrekte und objektive Datenerhebung zu gewinnen, wie sie sowohl für die Operationsplanung als auch für die postoperative Verlaufskontrolle in der Brustchirurgie von groβem Nutzen ist.The goal of this study was to evaluate the applicability of a surface laser scanner in the three-dimensional assessment of the female breast region. In particular, the evaluation was directed to patients with a hypertrophic or ptotic breast since the submammary region in these patients is often challenging to accurately image. For this purpose, a rigid model was assessed with a Minolta Vivid 910 three-dimensional linear surface laser scanner. This was done on different test conditions to develop the optimal scanning method. Subsequently, the influence of biotic parameters such as breathing or positional movement during the imaging process was investigated by applying the technique to five test subjects. Results showed that acceptable precision and reproducibility were achieved in the three-dimensional assessment of the female breast region which allows for obtaining correct and objective data when using this surface laser scanner. In conclusion, the described technique demonstrated to be a valuable and convenient tool for surgery planning, as well as for postoperative follow-up in breast surgery
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
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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