1,720,956 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
Human factors in access control: analysis and design
No full textThe ubiquity of communication technologies has led to the increased need of users to regulate access to their data. Traditional access control systems were mostly developed for military, governmental, and organizational settings. Even more, many of them assumed the presence of a responsible central authority that authors and enforces security policies. This is not true anymore. The development of Internet technologies and high availability of personal devices create new demands from users. In collaborative environments, where a central authority is missing or not completely responsible for user data, the user needs convenient methods to regulate access to their data.
Contemporary research approaches the problem of usable access control systems in different ways. One of the directions is dedicated to behavioral and perceptual aspects: how users perceive the permission management and what they do to achieve their access control goals. Although this approach provides useful observations, the existing research exhibits a number of inconsistencies. Another direction leverages prototype and model development, revealing a different problem: it is hardly possible to make a useful generalization based on individual use cases.
In this thesis we investigate the principles that underlie user perception of access control systems. We start from exploratory study of privacy protection behaviors. Subsequently, moving to a more specific level of access control, we rely on cognitive science and state that the utilization of visual metaphors and categorization might be beneficial for end users. The thesis presents two case studies to test these assumptions. Additionally, we further investigate the mechanism of categorization and design two models for collaborative platforms. The models have been tested for feasibility in simulated environments.
Our results suggest that both metaphors and categorization can be leveraged to improve different aspects of the access control system usability. First, we found out that visual metaphors are capable of implicitly transferring information about an access control system. Second, we established some prominent parallels between categorization in human cognition and the corresponding mechanisms of access control. Lastly, we demonstrated the applicability of categories as the main primitives of user-centric access control models
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
Cognition Behind Access Control: A Usability Comparison of Rule- and Category-Based Mechanisms
No full textInternational audienceUsability of a security mechanism has a notable impact on its efficacy. For instance, if users do not understand how to use the mechanism, they will make frequent mistakes. Given the magnitude of the problem, it seems desirable to understand what underlies the usability of security solutions. To achieve this, one needs to rely on solid theoretical foundation of human perception. In this paper, we investigate a problem of access control usability in the light of cognitive science. We rely on evidence from cognitive psychology and compare two systems that regulate access based on rules and categories. We perform a user-study of two approaches (N = 46). Our study reveals that a category-based approach has a higher perceived usability in terms of mental load and user performance. These results allow us to formulate recommendations for designers of access control systems
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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