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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
Management of recurrent benign and malignant pleural effusions with implantable pleural catheter
No full textEin rezidivierender Pleuraerguss kann aufgrund oft damit verbundenen starken Dyspnoe und thorakale Schmerzen die Lebensqualität des Erkrankten deutlich limitieren. Liegt eine fortgeschrittene Tumorerkrankung vor, stellt gerade die symptomatische Therapie neben der systemischen onkologischen Therapie einen wichtigen Therapieansatz in der palliativen Situation dar. Ziel dieser symptomatischen Therapie ist eine effektive Pleurodese.
Getunnelte Pleurakatheter (PleurX®-Katheter, Ewimed, Hechingen, Deutschland) stellen eine vergleichsweise neue Therapiemöglichkeit für Patienten mit rezidivierenden malignen Pleuraergüssen dar. In der hier vorliegenden Arbeit wurden die Behandlungsdaten eines an der Klinik Schillerhöhe zwischen 2007 und 2010 mit einem PleurX®-Kathetersystem versorgten Patientenkollektives retrospektiv ausgewertet. Insgesamt wurden bei 281 Patienten 285 PleurX®-Katheter implantiert. Für die Ergebnisse wurden die Patienten anhand ihrer Grunderkrankung in zwei Gruppen eingeteilt: In die Patientengruppe mit benignem Pleuraerguss und in die Patientengruppe mit malignem Pleuraerguss. In der Patientengruppe mit benignem Pleuraerguss lagen bei 32 Patienten 4 verschiedene Grunderkrankungen vor. In der Patientengruppe mit malignem Pleuraerguss lagen bei 249 Patienten 16 unterschiedliche Tumorentitäten zugrunde. Ziel dieser Auswertung war die Überprüfung der Behandlungswirksamkeit, die Häufigkeit therapieabhängiger Komplikationen und die poststationäre Versorgungssituation der Patienten mit einem PleurX®-Katheter. Des Weiteren sollten die Behandlungsergebnisse der jeweiligen Gruppen miteinander verglichen werden.
Durch das regelmäßige Ablassen des Pleuraergusses konnte in der Patientengruppe mit benignem Pleuraerguss bei 26 (81%) Patienten und in der Patientengruppe mit malignem Pleuraerguss bei 152 (61%) Patienten eine Spontanpleurodese erreicht werden. Die durchschnittliche Liegedauer des PleurX®-Katheters betrug in beiden Gruppen 121±195 bzw. 81±94 Tage. In unserem Studienkollektiv lag die postoperative Komplikationsrate in der Patientengruppe mit benignem Pleuraerguss bei 25% (8 von 32) und in der Patientengruppe mit malignem Pleuraerguss bei 16% (41 von 249). Die Ergebnisse dieser weltweit größten Patientenkohorte zeigen, dass bei den Komplikationen sekundäre Infektionen dominierten. Wir konnten feststellen, dass sich 2/3 der Patienten mit dem System selbst versorgen konnten und somit von Pflegediensten unabhängig waren. Bei dem Vergleich der Behandlungsergebnisse der beiden Gruppen konnten bis auf die Spontanpleurodeserate keine signifikanten Unterschiede aufgezeigt werden.
Insgesamt stellt die Versorgung mit PleurX®-Kathetern eine sichere Therapieoption mit geringer Komplikationsrate zur Behandlung benigner und maligner Pleuraergüsse dar.Recurrent pleural effusion associated with dyspnea and chest pain can hardly reduce patients quality of life. In case of advanced tumour disease symptomatic treatment represents an important role in addition to systematic oncological treatment. Aim of therapy is an effective pleurodesis.
Tunneled pleural catheter (PleurX®-Katheter, Ewimed, Hechingen, Germany) offer new therapeutic options for patients with recurrent malignant pleural effusions. This study presents retrospective treatment data of patients who received implantation of pleural catheter between 2007 and 2010 at schillerhoehe hospital. 285 catheters were implantated in 281 patients. Based on the underlying disease, patients were separated in to groups: patients with benign pleural effusions and patients with malignant effusions. There were 32 patients with 4 different underlying diseases in the group "benign pleural effusions" and 249 patients with 16 different underlying diseases in the group "malignant pleural effusions". We evaluated treatment efficacy, complications and outpatient care. Finally, we compared the results of both groups.
By frequently drainage spontaneus pleurodesis could be reached in 26 patients (81%) in the group "benign pleural effusions" and in 152 patients (61%) in the group "malignant pleural effusions". The average length of catheter stay was 121±195 resp. 81±94 days. Complications could be detected in 25% (8 of 32) resp. 16% (41 of 249). Secundary infections represented the major complication. 2/3 of the patients could handle the catheter by themselves, therefore no outpatient care was required. Comparing the treatment results of both groups, there was only a significant difference in the rate of spontaneus pleurodesis.
Overall treatment of benign and malignant pleural effusions with pleural catheter represents a save method with low rate of complications
Behandlung von rezidivierenden benignen und malignen Pleuraergüssen mit implantierbaren Pleurakathetern
No full textVariations 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
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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