1,721,004 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
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
Incidence and frequency distribution of bone tumors: statistical analysis of epidemiological data of the musculoskeletal tumor center of the university hospital Klinikum rechts der Isar
No full textIm muskuloskelettalen Tumorzentrum des Klinikums rechts der Isar der Technischen Universität München wurden im Zeitraum von Januar 1998 bis September 2009 1.542 Patienten mit benignen und malignen primären Knochentumoren diagnostiziert. Es wurden Häufigkeitsverteilung, Lokalisation sowie Alter und Geschlecht der Patienten retrospektiv deskriptiv analysiert und mit der einschlägigen internationalen Literatur verglichen. Neben einem Gesamtüberblick über alle Diagnosen wurden die jeweils drei häufigsten benignen und malignen Entitäten näher beleuchtet.1,542 patients had been diagnosed with benign and malignant primary bone tumors between January 1998 and September 2009 in the musculoskeletal tumor center of the hospital rechts der Isar of the technical university of Munich. Frequency, location as well as age and sex of patients were analyzed in a descriptive and retrospective manner and compared to the pertinent international publications. The three most frequent benign and malignant entities were reviewed besides an overview of all diagnosis
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
Ofloxacin concentration in serum, in ligamentum flavum, in disc tissue and in liquor during open operations on the human disc
No full text17 Patienten wurde 3 Stunden vor OP-Beginn 200 mg Ofloxacin i.v. verabreicht. Während der OP wurde den Patienten Ligamentum flavum, Bandscheibengewebe, BS- Sequester (nicht bei allen Pat.), Liquor sowie Blut zu OP-Beginn und OP-Ende entnommen um die Konzentration von Ofloxacin in den gewonnenen Gewebeproben und im Serum zu bestimmen. Die gemessenen Ofloxacinkonzentrationen lagen teilweise unter dem geforderten Wert von 1µg/ml, in den bradytrophen Geweben (Bandscheibe,Sequester) und Liquor deutlich niedriger als im wesentlich besser durchbluteten Ligamentum flavum. Im Vergleich zu den Ofloxacinkonz.in den Gewebeproben zeigten sich im Extravasalraum durchweg höhere Antibiotikumkonzentrationen. Obwohl die gemessenen Antibiotikumkonz. in Bezug auf die MIC von Staphylokokken vergleichbar mit denen von Cephalosporinen der 2.Generation sind, kann sich Ofloxacin nicht als Medikament zur perioperativen Infektprophylaxe durchsetzen. Ursächlich ist das ungünstige Nebenwirkungsspektrum von Ofloxacin gegenüber Cephalosporinen und die rasche Resistenzentwicklung von Staphylokokken auf das Antibiotikum.17 patients had been administered 200 mg ofloxacin intravenously three hours before starting surgery. During the operation ligamentum flavum, disc tissue, disc sequestrum(not in all patients), liquor as well as blood at operation start and operation end have been taken from the patient to determine the concentration of ofloxacin in the tissue samples collected and in the serum. The ofloxacin concen-trations measured were partly below the required value of 1µg/ml, in the bradytrophic tissues (disc,sequestrum) and in liquor significantly lower than in ligamentum flavum which is significantly better supplied with blood. In comparison to the ofloxacin concentrations in the tissue samples consistently higher antibiotic concentrations were found in the extravas-cular space. Although the antibiotic concentrations measured in relation to the MIC of staphylococci are comparable to those of cephalosporins of the 2nd generation, ofloxacin cannot become accepted as medicine for perioperative infection prophylaxis. This is due to the disadvantageous range of side effects of ofloxacin as compared to cephalosporins and the rapid development of resistance of staphylococci to the antibiotic
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
Functionality and quality of life as well as prognostic factors concerning survival after multimodal therapy of patients with a liposarcoma
Full text linkDie Dissertation befasst sich mit einer retrospektiven Studie zur Evaluation der
Funktionalität und Lebensqualität sowie der prognostischen Faktoren bezüglich des Überlebens nach einer multimodalen Therapie bei Patienten mit einem Liposarkom. Die Daten für die Auswertung wurden durch die Recherche von Patientenakten, OP-Berichten, Pathologie- und Radiologiebefunden sowie im Rahmen einer Nachuntersuchung erhoben. Das funktionale Outcome wurde mittels eines Fragebogens für Funktionale Evaluation nach Enneking et al 1993 ermittelt. Bei der statistischen Auswertung konnten Tendenzen hinsichtlich des Einflusses der Tumorgröße, des Gradings, des Resektions-, des Lokalrezidiv- und Metastasierungsstatuses auf die Prognose aufgezeigt werden. Bezüglich des funktionellen Outcomes wurden bessere Ergebnisse bei einer weiten lokalen Resektion im Vergleich zu einer radikalen Tumoroperation oder Amputation erzielt.The dissertation treats a retrospective study for the evaluation concerning survival after multimodal therapy of patients with a liposarcoma. The datas for the interpretation were collected by research of the patient records, operation reports, pathology- and radiology findings as well as by a follow-up examination. The functional outcome was determined by the questionnaire of Enneking et al 1993.
The statistical analysis shows tendencies relating to the influences of tumor size, grading and resection-, local recurrence and distant recurrence status on the prognosis. Regarding the functional outcome there are better results by using a wide local resection compared with a radical tumor operation or amputation
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