1,720,992 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
COLOMBO: Investigating the potential of V2X for traffic management purposes assuming low penetration rates
No full textAppropriate 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
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
Eine mikrosimulationsbasierte Methode zur Beurteilung der Leistungsfähigkeit von Shared Space
Full text linkShared space is a concept of urban street design which implies the creation of a level
surface within the whole road reserve and is aimed at encouraging different road users to
interact spontaneously and to negotiate priority with each other. To build successful shared
spaces, traffic engineers can rely at present on specific guidelines as well as technical reports.
Nevertheless, there is no method available to compute the performance of shared spaces in
terms of Level Of Service (LOS).
In order to address this gap, a new indicator of traffic quality for pedestrians is being
developed. This measure of performance considers aspects of comfort related to the
crossing, which pedestrians use to go from one side of the roadway to the other. During
this movement, discomfort is generated by the necessity to solve the conflicts with vehicles.
Therefore, factors which potentially influence comfort are mathematically formulated.
Later, the performance indicator can be calibrated on the basis of the opinion of a group
of respondents, who evaluated real-world crossing movements in video sequences. The
effectiveness and usability of the developed indicator is demonstrated in an exemplary case
study. A shared street in the district of Bergedorf, Hamburg (D) is selected and filmed.
To reproduce the interaction of road users and the mechanism of space negotiation, an
innovative modeling approach based on social force model (SFM) is proposed. The model
is calibrated and implemented in a Java-based simulation tool. Alternative shared space
scenarios, as well as conventional ones with space segregation, are simulated.
The goal of this dissertation is to establish a method to evaluate the performances of
shared spaces through traffic microsimulation. This method includes the data survey and
acquisition, the definition of performance indicators, the development of a microsimulation
approach, the calibration of the motion model on the basis of real-world data and finally
the execution of simulations to collect the results. In addition, this work shows the necessity
to employ a comfort-based indicator for pedestrian traffic quality in shared spaces. The
benefits of this approach, with respect to conventional efficiency-based indicators as time
delay, is properly shown in real-world situations and successively demonstrated by help of
statistical methods.Shared Space ist ein Konzept der urbanen Straßengestaltung, das die Schaffung von niveaugleichen
Zonen im gesamten Straßenquerschnitt beinhaltet, und darauf abzielt, die verschiedenen
Verkehrsteilnehmer zu ermutigen, spontan zu interagieren und den Vorrang
untereinander auszuhandeln. Um erfolgreiche Shared Spaces zu gestalten, können sich
Ingenieure derzeit auf spezifische Richtlinien, sowie auf technische Berichte stützen. Dennoch
gibt es keine Methode, um die Qualität des Shared Space im Hinblick auf den Level of
Service (LOS) zu kalkulieren.
Daher wird ein neuer Verkehrsqualitätsindikator für Fußgänger entwickelt. Diese Erfolgsmessgröße
berücksichtigt Komfortaspekte hinsichtlich der von Fußgängern zur Querung
der Straßen benutzten Übergänge. Während der Überquerung wird durch das Aushandeln
des Vorrangs mit den Fahrzeugen ein Unbehagen erzeugt. Daher werden potentiell komfortbeeinflussende
Faktoren mathematisch formuliert. Später kann der Leistungsindikator auf Basis der Ansicht einer Umfragegruppe,
die reale Straßenüberquerungen in Videosequenzen
auswertet, kalibriert werden. Die Effektivität und Tauglichkeit des entwickelten Indikators
wird in einer exemplarischen Fallstudie im Hamburger Bezirk Bergedorf demonstriert. Hierzu
wird der dortige Shared Space gefilmt. Um die Interaktion von Verkehrsteilnehmern
und die Wirkungsweise der Verkehrsraumaushandlung nachzustellen, wird ein innovativer
Modellierungsansatz, der auf dem sozialen Kräftemodell basiert, empfohlen. Das Modell
wird in einem Java-basierten Simulationstool kalibriert und implementiert. Verschiedene
Shared Space Arten und konventionelle Szenarien mit Raumtrennung werden simuliert.
Das Ziel dieser Dissertation ist es, ein Verfahren zur Auswertung der Performances von
Shared Spaces durch Verkehrsmikrosimulation zu entwickeln. Dieses Verfahren beinhaltet
die Datenerhebung und –erfassung, die Definition der Leistungsindikatoren, die Entwicklung
eines Mikrosimulationsansatzes und die Kalibrierung des Bewegungsmodells auf Basis realer
Daten. Zudem werden Simulationen durchgeführt, um Ergebnisse zu sammeln. Des
Weiteren zeigt diese Arbeit die Notwendigkeit, einen komfortbasierten Indikator für die
Verkehrsqualität der Fußgänger in Shared Spaces zu verwenden. Die Vorteile dieses Ansatzes,
gegenüber konventionellen, effizienzbasierten Indikatoren wie z.B. Zeitverzögerungen,
werden entsprechend in praxistauglichen Situationen dargestellt und sukzessiv mittels
statistischer Verfahren veranschaulicht
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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