1,721,153 research outputs found
Towards an Optimal Viewpoint in Third-Person out-of-body Experiences
No full textHuman vision underlies natural constraints. Field of view, perceived wavelength, angular resolution, or perspective are just a few. Combining a head-mounted display with a camera can overcome some of these limitations and constraints. We investigate the field of view, which is created by presenting a third person view to the wearer of the head-mounted display. We propose an automatic camera positioning that may provide a better overview to the user compared to a manual positioning
Remote Drawing on Vertical Surfaces with a Self-Actuated Display
No full textToday, most digital devices are either stationary, often placed on horizontal surfaces like tables, or so-called mobile devices which are carried around by the user. In this demonstration we showcase our ongoing work on a novel type of self-actuated display. It can be placed on walls, or whiteboards and other arbitrarily oriented surfaces like ceilings. It is equipped with a whiteboard marker which allows the device to draw on surfaces it is attached to. In this work, we demonstrate the device's capabilities using an interactive scenario in which users are able to remotely control the self-actuated display to draw lines on a whiteboard. They control the device either by using their own smart phone or a provided tablet computer
Investigating the Effect of Orientation and Visual Style on Touchscreen Slider Performance
No full textSliders are one of the most fundamental components usedin touchscreen user interfaces (UIs). When entering datausing a slider, errors occur due e.g. to visual perception,resulting in inputs not matching what is intended by the user.However, it is unclear if the errors occur uniformly acrossthe full range of the slider or if there are systematic offsets.We conducted a study to assess the errors occurring whenentering values with horizontal and vertical sliders as wellas two common visual styles. Our results reveal significanteffects of slider orientation and style on the precision of theentered values. Furthermore, we identify systematic offsetsthat depend on the visual style and the target value. As theerrors are partially systematic, they can be compensated toimprove users’ precision. Our findings provide UI designerswith data to optimize user experiences in the wide varietyof application areas where slider based touchscreen input isused
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
- …
