1,720,982 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
Test- und Trainingsfahrrad für Personen mit Querschnittlähmung zur Optimierung der Stimulationsparameter
Get PDFMit Hilfe von Funktioneller Elektrostimulation (FES) der Beinmuskulatur wird es Personen mit Querschnittlähmung möglich auf adaptierten Fahrrädern eine Tretbewegung durchzuführen und auch - mit Einschränkungen - selbstständig zu fahren. Dabei übernimmt ein Stimulator an Stelle des Zentralnervensystems die Aufgabe die einzelnen Muskeln und Muskelgruppen in den entsprechenden Winkelbereichen der Tretkurbel zu aktivieren. Die Aktivierung der Muskeln erfolgt über Oberflächenelektroden die mittels einer Klebefläche auf der Haut des Fahrers angebracht sind und über das von ihnen erzeugte elektrische Feld den Muskel zur Kontraktion anregen.Das Fahrradfahren mit eigener Muskelkraft kann als therapeutische Maßnahme im Rahmen der Rehabilitation von querschnittgelähmten Personen eingesetzt werden und hat neben den erwünschten psychologischen Effekten auch zahlreiche positive physiologische Auswirkungen. Ziel dieser Arbeit war es ein Fahrrad für Personen mit Rückenmarksverletzungen zu entwickeln, welches zum einen als Prüfstand dient und zum anderen als einsatzfähiges Trainingsfahrrad Verwendung findet. Auf Grund von Tretkurbeln mit integrierter Kraftmessung ermöglicht das Fahrrad in seiner Funktion als Prüfstand über vorbereitete Messroutinen eine einfache Ermittlung der für die einzelnen Fahrer effizienten Stimulationsparameter. Durch die Möglichkeit das Tretlager vertikal und horizontal zu verstellen und den Sitz und die Rückenlehne unabhängig von einander in einem großen Winkelbereich zu neigen ist es auch möglich die Sitzposition des jeweiligen Fahrers leistungsoptimal anzupassen. Mit diesen optimierten Parametern kann der Querschnittgelähmte nachfolgend auf dem Fahrrad trainieren und auf geeigneten Strecken im Freien Rad fahren.Ein in das Fahrrad integrierter Nabenmotor ermöglicht es eine konstante Umdrehungsgeschwindigkeit der Tretkurbeln für die Messroutinen vorzugeben und dient als Hilfsmotor, um dem Fahrer bei Steigungen und nach Ermüdung der Muskulatur zu unterstützen.Im Zuge des Projektes wurde auch ein Auswerteprogramm entwickelt, das eine schnelle Auswertung der Messergebnisse vor Ort im Rehabilitationszentrum bietet. Während dieser Messungen konnten erste viel versprechende Ergebnisse gewonnen werden und einigen querschnittgelähmten Probanden wurden so erste Eindrücke über das Radfahren mittels FES vermittelt.Functional electrical stimulation (FES) of the lower limbs enables persons with a spinal cord injury to perform cycling on modified tricycles. In this case the activation of the individual muscles and muscle groups in the corresponding crank angle areas is carried out by a stimulator instead of the central nerve system. Therefore surface electrodes are attached above the selected muscles which are stimulated to generate contractions due to the induced electrical field. Cycling with the power of their leg muscles can be an important supporting therapy for paraplegic persons during rehabilitation and has beside the psychological benefits also numerous positive physiological effects.The aim of this project was to develop a tricycle for persons with functional deficits of the lower limbs caused by injuries of the spinal cord. The vehicle should both work as a test bed to determine the optimal stimulation patterns for the individual rider, and should also find application as a tricycle for regular exercise. In its function as a test bed it is possible to choose between several prepared test routines and together with the integrated force measurement in the cranks the relation between stimulation and the power output can be recorded. Due to the possibility to vary the horizontal and vertical position of the crank shaft and to incline the seat and the backrest independently in a wide angle area an efficient sitting position for each driver can be adjusted. After running through the different test routines the person with paraplegia can use his/ her optimized settings to exercise on the tricycle or cycle on suitable routes outside the rehabilitation centre. There is a hub motor integrated in the tricycle, which can drive the cranks at a constant cadence for the measurements and supports the driver to get over steep inclinations or in the case of muscle fatigue. For a fast data processing a program was developed for the particular purpose to evaluate the measurements on site at the rehabilitation centre. During these measurements first promising results have been found and most of the paraplegic test persons were able to perform cycling by means of FES
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
Functional and usability assessment of a robotic exoskeleton arm to support activities of daily life
Get PDFDispelling 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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