1,720,955 research outputs found
Exploring Pupil Dilation as an Indicator of Performance in Gaze-Based Robot Navigation for Assistive Technology
Get PDFHuman-robot interaction (HRI) based assistive devices play a crucial role for individuals with severe disability, significantly impacting their quality of life. A pivotal step towards creating a more human-centric HRI involves gaining a thorough understanding of the user's mental load such as cognitive load, stress, and fatigue, which can influence the performance of the system. Previous studies have found pupil dilation as a potential candidate for exploring mental workload. This paper explores the impact of pupil diameter variation on performance during an eye-tracking-based robot navigation task. Nineteen healthy individuals participated in the experiment where they used eye-gaze to activate different navigational buttons on a computer screen to control the movement of a mobile robot on a predefined trajectory for two rounds. The variation of pupil diameter is correlated to various performance parameters such as lap completion time and number of commands. Results show that the difference between the Gaussian means of the pupil diameter distribution during round1 and round2 is significantly correlated (rho =0.5, p-value =0.03) with the lap completion time while the correlation with the number of commands is also found to be strong (r h o=0.45, p-value =0.05). These quantifications of pupil diameter variations with performance measures have the potential to play a vital role in advancing the HRI systems as they can be used to predict the performance variation in real-time so that the HRI can be more responsive to the user's changing mental states, a key requirement for the practical usability and acceptability of such systems as assistiv
Evaluating a Gaze-Controlled Navigation Interface: A User-Centered Approach
Get PDFThe design and acceptability of new products are essential factors in their development, particularly for assistive devices that users rely on for everyday tasks. Gathering user feedback is vital to ensuring that these devices are intuitive, simple to use, and not overwhelming. This study involved 19 participants who tested a newly developed gaze-controlled interface, navigated through predefined paths, and completed questionnaires. This study involved two predefined paths, with participants navigating the first path twice before proceeding to the second path. On average, participants reported low mental, physical, and temporal demands. While younger participants finished the tasks more quickly, participants over the age of 50 showed notable improvement in performance during the second round, likely due to greater familiarity with the system, suggesting that the interface is easy to learn. Furthermore, a significant correlation was found between lap completion time and self-reported mental demand (r = 0.609, p = 0.007), indicating a connection between task performance and per- ceived cognitive load. These results emphasize the importance of designing assistive technology that is accessible and effective for users of varying ages and abilities
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
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
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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