1,721,230 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
A distributed virtual reality system for spatial updating : concepts, implementation, and experiments
Full text linkvon der Heyde M. A distributed virtual reality system for spatial updating : concepts, implementation, and experiments. Bielefeld (Germany): Bielefeld University; 2000.Introduction: Over the course of evolution humans as well as other animals learned to navigate through complex environments. Such navigation had two main goals: to find food and to find the way back to shelter. For most moving organisms it is important to know their location in the world and maintain some internal representation of it. For higher species it is most likely that multiple sensory systems provide information to solve this task. Consequently, to study human behavior in a complex environment it is important that the experimenter has full control over the stimulus for multiple senses. Furthermore, it is crucial to guarantee the following: A) The stimulus, and the information it conveys has to be precisely controllable; B) The experimental conditions have to be repeatable; and C) The stimulus conditions have to be independent of the individual characteristics of the observer. Virtual Environments have to some degree offered a solution for these demands. Recently, it has become increasingly possible to conduct psychophysical experiments with more than one sensory modality at a time. In this thesis, Virtual Reality (VR) technology was used to design multi-sensory experiments which look into some aspects of the complex multi-modal interactions of human behavior.
Contents: The first part of this PhD thesis describes a Virtual Reality laboratory which was built to allow the experimenter to stimulate four senses at the same time: vision, acoustics, touch, and the vestibular sense of the inner ear. Special purpose equipment is controlled by individual computers to guarantee optimal performance of the modality specific simulations. These computers are connected in a network functioning as a distributed system using asynchronous data communication. The second part of the thesis presents two experiments which investigate the ability of humans to perform spatial updating. These experiments contribute new scientific results to the field and serve, in addition, as proof of concept for the VR-lab. More specifically, the experiments focus on the following main questions: A) Which information do humans use to orient in the environment and maintain an internal representation about the current location in space?; B) Do the different senses code their percept in a single spatial representation which is used across modalities, or is the representation modality specific?
Results and Conclusions: The experimental results allow the following conclusions: A) Even without vision or acoustics, humans can verbally judge the distance traveled, peak velocity, and to some degree even maximum acceleration using relative scales. Therefore, they can maintain a good spatial orientation based on proprioception and vestibular signals; B) Learning the sequence of orientation changes with multiple modalities (vision, proprioception and vestibular input) enables humans to reconstruct their heading changes from memory. In situations with conflicting cues, the maximum percept from either of the modalities had a major influence on the reconstruction. Most of the naïve subjects did not notice any conflicts between modalities. In total, this seems to suggest that there is a single spatial reference frame used for spatial memory. One possible model for cue integration might be based on a dynamically weighted sum of all modalities which is used to come up with a coherent percept and memory for spatial location and orientation
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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