| 1. |
- Lu, Zhihan, et al.
(författare)
-
Multimodal Hand and Foot Gesture Interaction for Handheld Devices
- 2014
-
Ingår i: ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP). - : Association for Computing Machinery (ACM). - 1551-6857 .- 1551-6865. ; 11:1
-
Tidskriftsartikel (refereegranskat)abstract
- We present a hand-and-foot-based multimodal interaction approach for handheld devices. Our method combines input modalities (i.e., hand and foot) and provides a coordinated output to both modalities along with audio and video. Human foot gesture is detected and tracked using contour-based template detection (CTD) and Tracking-Learning-Detection (TLD) algorithm. 3D foot pose is estimated from passive homography matrix of the camera. 3D stereoscopic and vibrotactile are used to enhance the immersive feeling. We developed a multimodal football game based on the multimodal approach as a proof-of-concept. We confirm our systems user satisfaction through a user study.
|
|
| 2. |
- Picazo-Sanchez, Pablo, 1985, et al.
(författare)
-
Are chrome extensions compliant with the spirit of least privilege?
- 2022
-
Ingår i: International Journal of Information Security. - : Springer Science and Business Media LLC. - 1615-5262 .- 1615-5270. ; 21:6, s. 1283-1297
-
Tidskriftsartikel (refereegranskat)abstract
- Extensions are small applications installed by users and enrich the user experience of browsing the Internet. Browsers expose a set of restricted APIs to extensions. To be used, extensions need to list the permissions associated with these APIs in a mandatory extension file named manifest. In particular, Chrome’s permission ecosystem was designed in the spirit of the least privilege. Yet, this paper demonstrates that 39.8% of the analyzed extensions provided by the official Web Store are compliant with the spirit of least privilege. Also, we develop: (1) a browser extension to make aware regular users of the permissions the extensions they install; (2) a web app where extensions developers can check whether their extensions are compliant with the spirit of the least privileged; and (3) a set of scripts that can be part of the vendors’ acceptance criteria such that when developers upload their extensions to the official repositories, the scripts automatically analyze the extensions and generate a report about the permissions and the usage.
|
|
| 3. |
- Frid, Emma, 1988-, et al.
(författare)
-
Perceptual Evaluation of Blended Sonification of Mechanical Robot Sounds Produced by Emotionally Expressive Gestures : Augmenting Consequential Sounds to Improve Non-verbal Robot Communication
- 2021
-
Ingår i: International Journal of Social Robotics. - : Springer Nature. - 1875-4791 .- 1875-4805.
-
Tidskriftsartikel (refereegranskat)abstract
- This paper presents two experiments focusing on perception of mechanical sounds produced by expressive robot movement and blended sonifications thereof. In the first experiment, 31 participants evaluated emotions conveyed by robot sounds through free-form text descriptions. The sounds were inherently produced by the movements of a NAO robot and were not specifically designed for communicative purposes. Results suggested no strong coupling between the emotional expression of gestures and how sounds inherent to these movements were perceived by listeners; joyful gestures did not necessarily result in joyful sounds. A word that reoccurred in text descriptions of all sounds, regardless of the nature of the expressive gesture, was “stress”. In the second experiment, blended sonification was used to enhance and further clarify the emotional expression of the robot sounds evaluated in the first experiment. Analysis of quantitative ratings of 30 participants revealed that the blended sonification successfully contributed to enhancement of the emotional message for sound models designed to convey frustration and joy. Our findings suggest that blended sonification guided by perceptual research on emotion in speech and music can successfully improve communication of emotions through robot sounds in auditory-only conditions.
|
|
| 4. |
- Saqr, Mohammed, et al.
(författare)
-
People, Ideas, Milestones : A Scientometric Study of Computational Thinking
- 2021
-
Ingår i: ACM Transactions on Computing Education. - : Association for Computing Machinery (ACM). - 1946-6226. ; 21:3
-
Tidskriftsartikel (refereegranskat)abstract
- The momentum around computational thinking (CT) has kindled a rising wave of research initiatives andscholarly contributions seeking to capitalize on the opportunities that CT could bring. A number of literaturereviews have showed a vibrant community of practitioners and a growing number of publications. However,the history and evolution of the emerging research topic, the milestone publications that have shaped itsdirections, and the timeline of the important developments may be better told through a quantitative, scientometric narrative. This article presents a bibliometric analysis of the drivers of the CT topic, as well as itsmain themes of research, international collaborations, influential authors, and seminal publications, and howauthors and publications have influenced one another. The metadata of 1,874 documents were retrieved fromthe Scopus database using the keyword “computational thinking.” The results show that CT research has been US-centric from the start, and continues to be dominated by US researchers both in volume and impact. International collaboration is relatively low, but clusters of joint research are found between, for example, anumber of Nordic countries, lusophone- and hispanophone countries, and central European countries. The results show that CT features the computing’s traditional tripartite disciplinary structure (design, modeling, and theory), a distinct emphasis on programming, and a strong pedagogical and educational backdrop including constructionism, self-efficacy, motivation, and teacher training.
|
|
| 5. |
- Frid, Emma, et al.
(författare)
-
Interactive Sonification of Spontaneous Movement of Children : Cross-Modal Mapping and the Perception of Body Movement Qualities through Sound
- 2016
-
Ingår i: Frontiers in Neuroscience. - : Frontiers Media S.A.. - 1662-4548 .- 1662-453X. ; 10
-
Tidskriftsartikel (refereegranskat)abstract
- In this paper we present three studies focusing on the effect of different sound models in interactive sonification of bodily movement. We hypothesized that a sound model characterized by continuous smooth sounds would be associated with other movement characteristics than a model characterized by abrupt variation in amplitude and that these associations could be reflected in spontaneous movement characteristics. Three subsequent studies were conducted to investigate the relationship between properties of bodily movement and sound: (1) a motion capture experiment involving interactive sonification of a group of children spontaneously moving in a room, (2) an experiment involving perceptual ratings of sonified movement data and (3) an experiment involving matching between sonified movements and their visualizations in the form of abstract drawings. In (1) we used a system constituting of 17 IR cameras tracking passive reflective markers. The head positions in the horizontal plane of 3-4 children were simultaneously tracked and sonified, producing 3-4 sound sources spatially displayed through an 8-channel loudspeaker system. We analyzed children’s spontaneous movement in terms of energy-, smoothness- and directness index. Despite large inter-participant variability and group-specific effects caused by interaction among children when engaging in the spontaneous movement task, we found a small but significant effect of sound model. Results from (2) indicate that different sound models can be rated differently on a set of motion-related perceptual scales (e.g. expressivity and fluidity). Also, results imply that audio-only stimuli can evoke stronger perceived properties of movement (e.g. energetic, impulsive) than stimuli involving both audio and video representations. Findings in (3) suggest that sounds portraying bodily movement can be represented using abstract drawings in a meaningful way. We argue that the results from these studies support the existence of a cross-modal mapping of body motion qualities from bodily movement to sounds. Sound can be translated and understood from bodily motion, conveyed through sound visualizations in the shape of drawings and translated back from sound visualizations to audio. The work underlines the potential of using interactive sonification to communicate high-level features of human movement data.
|
|
| 6. |
- Tollmar, Konrad, et al.
(författare)
-
VideoCafe - exploring mediaspaces in public places within organizations
- 2001
-
Ingår i: Behavior and Information Technology. - : Informa UK Limited. - 0144-929X .- 1362-3001. ; 20, s. 101-110
-
Tidskriftsartikel (refereegranskat)abstract
- This paper describes our studies of mediaspaces which are embedded within public places in organizations so as to examine the hypothesis that individuals might benefit even when working apart - from opportunities for light informal interaction. A set of full-scale prototypes were used and assessed over extensive periods of time. The informal observations and reflection in design of these places have been supplemented by formal studies. We found that great care needs to be taken when designing these places from an architectural point of view. For some of the places, we would like to suggest using architectural features when altering the room rather than technology. In other settings, the artful deployment of communication media might be more effective.
|
|
| 7. |
- Enoksson, Fredrik, 1977-, et al.
(författare)
-
The activity of human metadata creation and the Semantic Web
- 2015
-
Ingår i: International Journal of Metadata, Semantics and Ontologies. - Geneva, SWITZERLAND : InderScience Publishers. - 1744-263X. ; 10:2, s. 64-74
-
Tidskriftsartikel (refereegranskat)abstract
- This paper presents an explorative study of the human activity of creating metadata, done with the purpose of exploring the practices of this activity and how those can potentially impact the utility of the metadata as it is exposed on a level that enables semantic collaboration, like the Semantic Web. Previous research around human metadata creation seems to indicate that how the activity is carried out has a common core, but is unique in each situation on how it can be improved. The data for this study was gathered through interviews and analyzed using activity theory. The analysis of the data gathered through the interviews indicate that the main objective of the activity is to enable discovery within a collection. Metadata is however created with a community of users in mind, which is sometimes reflected in metadata creation guidelines. These guidelines can in turn impact the discoverability across these communities as metadata is exposed on the Semantic Web.
|
|
| 8. |
- Eriksson, Eva, 1976, et al.
(författare)
-
Makerspace in school : Considerations from a large-scale national testbed
- 2018
-
Ingår i: International Journal of Child-Computer Interaction. - : Elsevier. - 2212-8689 .- 2212-8697. ; 16, s. 9-15
-
Tidskriftsartikel (refereegranskat)abstract
- Digital fabrication and making has received a growing interest in formal and informal learning environments. However, many of these initiatives often start from a grassroots perspective, with little coordination on a national level. This paper illustrates and discusses a study from an ongoing large-scale national testbed in Sweden named Makerspace in schools (Makerskola). The project embodies a series of considerations that arise when a maker approach is applied to a geographically widespread national education context. The results of this study are based on an analysis of the extensive project documentation and first-hand experiences from initiating and running a large-scale national testbed in Sweden, involving more than 30 formal actors and more than one thousand active partners in a national educational setting. The main contribution of this paper is the identification and discussion of five different considerations that have emerged during the project, and include Procurement practices, The teacher and leader perspective, Informing national policy making, Creating equal opportunities, and Progression in digital fabrication.
|
|
| 9. |
- Jacobsson, Mattias, et al.
(författare)
-
GlowBots : Designing and Implementing Engaging Human-Robot Interaction
- 2008
-
Ingår i: Journal of Physical Agents. - 1888-0258. ; 2:2, s. 51-60
-
Tidskriftsartikel (refereegranskat)abstract
- GlowBots are small tangible, communicating and interactive robots that show eye-catching visual patterns on a round LED display. This paper details the development of the GlowBots from the early user-oriented design phase, through hardware and software development and onto preliminary user studies. In the design phase we outlined a robot application based on a study of how owners relate with unusual pets, such as snakes and lizards. This led to an application concept of a set of ”hobby robots” which would communicate with each other and the user through dynamic patterns. Based on these requirements, we developed a LED display called see- Puck, which together with an open robot platform was used for the GlowBots application itself. One particular issue is dealing with energy consumption problems, as resources in embedded systems often limit the potential time for user interaction. We conclude with a report on early user experiences from demonstrating GlowBots and a preliminary user study in a home environment as well as remarks about future directions.
|
|
| 10. |
- Katzeff, Cecilia, 1957-, et al.
(författare)
-
Exploring Sustainable Practices in Workplace Settings through Visualizing Electricity Consumption
- 2013
-
Ingår i: ACM Transactions on Computer-Human Interaction. - New York : ACM Press. - 1073-0516 .- 1557-7325. ; 20:5
-
Tidskriftsartikel (refereegranskat)abstract
- People’s domestic habits are increasingly being targeted to reduce levels of CO2 emissions. Whereas domestic energy consumption has received a lot of attention with several reported studies on sustainable practices, there are very few studies on workplace practices. Nevertheless, these are considered as having much potential for reducing energy consumption. This paper presents the findings from two field studies where two different types of prototypes for visualizing energy use were designed, implemented and evaluated in different types of workplace settings – factories and offices. The studies used design probes to explore how visual feedback for electricity use was interpreted and acted upon by employees in work settings. A striking observation was that it is very difficult to get people to change to more pro-environmental behavior and practices in a workplace environment. The paper discusses why this might be the case.
|
|
