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Publications (10 of 21) Show all publications
Konstantinidis, S., Brox, E., Kommervold, P. E., Hallberg, J., Evertsen, G. & Hirche, J. (2016). Online Social Exergames for Seniors: Pillar of Gamification for Clinical Practice. In: Daniel Novák ; Bengisu Tulu; Håvar Brendryen (Ed.), Handbook of Research on Holistic Perspectives in Gamification for Clinical Practice: (pp. 245-276). Paper presented at . IGI Global
Open this publication in new window or tab >>Online Social Exergames for Seniors: Pillar of Gamification for Clinical Practice
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2016 (English)In: Handbook of Research on Holistic Perspectives in Gamification for Clinical Practice, IGI Global, 2016, p. 245-276Chapter in book (Refereed)
Abstract [en]

The population is getting older, and the resources for care will be even more limited in the future than they are now. There is thus an aim for the society that the seniors can manage themselves as long as possible, while at the same time keeping a high quality of life. Physical activity is important to stay fit, and social contact is important for the quality of life. This chapter aims to provide a state-of-the-art of online social exergames for seniors, providing glimpses of senior users’ opinions and games limitations. The importance of the motivational techniques will be emphasized, as well as the impact that the exergames have to seniors. It will contribute to the book objectives focusing on current state and practice in health games for physical training and rehabilitation and the use of gamification, exploring future opportunities and uses of gamification in eHealth and discussing the respective challenges and limitations.

Place, publisher, year, edition, pages
IGI Global, 2016
National Category
Media and Communication Technology
Research subject
Pervasive Mobile Computing
Identifiers
urn:nbn:se:ltu:diva-21303 (URN)10.4018/978-1-4666-9522-1.ch012 (DOI)2-s2.0-84958139706 (Scopus ID)d3fac605-8972-4735-be14-002d405e4bce (Local ID)9781466695221 (ISBN)9781466695238 (ISBN)d3fac605-8972-4735-be14-002d405e4bce (Archive number)d3fac605-8972-4735-be14-002d405e4bce (OAI)
Note

Godkänd; 2015; 20141218 (qwazi)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Bomark, P., Hirche, J. & Hagman, O. (2015). Colour visualisation of real virtual timber using image quilting (ed.). European Journal of Wood and Wood Products, 73(6), 837-839
Open this publication in new window or tab >>Colour visualisation of real virtual timber using image quilting
2015 (English)In: European Journal of Wood and Wood Products, ISSN 0018-3768, E-ISSN 1436-736X, Vol. 73, no 6, p. 837-839Article in journal (Refereed) Published
Abstract [en]

When presenting images of wood obtained through x-ray computed tomography to an audience inexperienced in interpreting radiological images, explaining the correspondence between mass attenuation and features of wood could be time consuming and confusing. Realistically colourised attenuation images might be a suitable option in order to facilitate understanding of the images. Mass attenuation and colour of wood does not have a simple correlation, so naive grey-scale to colour conversion does not work. This paper describes how image quilting can be used to transfer colour information from a image pair where both mass attenuation and colour is known to a target mass attenuation image. An example of this method applied on scots pine shows that it is capable of retaining the major structures of wood, such as year rings and knots. The method could allow for easier understanding of simulation studies where logs scanned using x-ray computed tomography are virtually sawn.

National Category
Other Mechanical Engineering Media and Communication Technology
Research subject
Mobile and Pervasive Computing; Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-4876 (URN)10.1007/s00107-015-0940-y (DOI)000363718300015 ()2-s2.0-84944931025 (Scopus ID)2e0febd0-4f4d-40a2-a195-f8f9aa139061 (Local ID)2e0febd0-4f4d-40a2-a195-f8f9aa139061 (Archive number)2e0febd0-4f4d-40a2-a195-f8f9aa139061 (OAI)
Note

Validerad; 2015; Nivå 2; 20141112 (petbom)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Bomark, P., Evertsen, G., Brox, E., Hirche, J. & Yliräisänen-Seppänen, P. (2012). A prototype social learning platform for children with diabetes type 1 (ed.). In: (Ed.), (Ed.), Proceeding of the 16th International Academic MindTrek Conference 2012: Envision Future Media Environments. Paper presented at MindTrek : Entertainment and Media in the Ubiquitous Era 03/10/2012 - 05/10/2012 (pp. 211-213). New York: Association for Computing Machinery, Inc.
Open this publication in new window or tab >>A prototype social learning platform for children with diabetes type 1
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2012 (English)In: Proceeding of the 16th International Academic MindTrek Conference 2012: Envision Future Media Environments, New York: Association for Computing Machinery, Inc. , 2012, p. 211-213Conference paper, Published paper (Refereed)
Abstract [en]

Children diagnosed with diabetes type 1 are bombarded with information and have a hard time understanding it all. Existing information material consists mostly ofbrochures and textbooks, giving little opportunity for testing and trial-and-error without consequences. A social platform with learning games gives the children an opportunity to experiment and find peer support, which is important for coping with a life long disease.

Place, publisher, year, edition, pages
New York: Association for Computing Machinery, Inc., 2012
National Category
Other Mechanical Engineering Media and Communication Technology
Research subject
Wood Products Engineering; Mobile and Pervasive Computing
Identifiers
urn:nbn:se:ltu:diva-39874 (URN)10.1145/2393132.2393174 (DOI)2-s2.0-84870478946 (Scopus ID)ecacdc34-6a59-4fe5-9242-626f388e749a (Local ID)978-1-4503-1637-8 (ISBN)ecacdc34-6a59-4fe5-9242-626f388e749a (Archive number)ecacdc34-6a59-4fe5-9242-626f388e749a (OAI)
Conference
MindTrek : Entertainment and Media in the Ubiquitous Era 03/10/2012 - 05/10/2012
Note
Godkänd; 2012; 20121012 (petbom)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2018-07-10Bibliographically approved
Brox, E., Evertsen, G., Bomark, P., Hirche, J. & Yliräisänen-Seppänen, P. (2012). User centric social diabetes game design for children (ed.). In: (Ed.), (Ed.), Proceeding of the 16th International Academic MindTrek Conference 2012: Envision Future Media Environments. Paper presented at MindTrek : Entertainment and Media in the Ubiquitous Era 03/10/2012 - 05/10/2012 (pp. 291-293). New York: Association for Computing Machinery, Inc.
Open this publication in new window or tab >>User centric social diabetes game design for children
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2012 (English)In: Proceeding of the 16th International Academic MindTrek Conference 2012: Envision Future Media Environments, New York: Association for Computing Machinery, Inc. , 2012, p. 291-293Conference paper, Published paper (Refereed)
Abstract [en]

Children recently diagnosed with diabetes type 1 require lots ofinformation and feel scared, alone and different. Most of theexisting educational material is on paper. Games with relevantlearning content are mainly small minigames in English. There isa need for more material with a focus on user needs, particularlylearning–by-doing material. Peer support is known to beimportant for this user group. We present a concept for a sociallearning game that is engaging and fun for diabetic children.

Place, publisher, year, edition, pages
New York: Association for Computing Machinery, Inc., 2012
National Category
Media and Communication Technology Other Mechanical Engineering
Research subject
Mobile and Pervasive Computing; Wood Products Engineering
Identifiers
urn:nbn:se:ltu:diva-33149 (URN)10.1145/2393132.2393196 (DOI)2-s2.0-84870548442 (Scopus ID)7ef64d2d-2c87-40d2-af99-d62e0c8789a6 (Local ID)978-1-4503-1637-8 (ISBN)7ef64d2d-2c87-40d2-af99-d62e0c8789a6 (Archive number)7ef64d2d-2c87-40d2-af99-d62e0c8789a6 (OAI)
Conference
MindTrek : Entertainment and Media in the Ubiquitous Era 03/10/2012 - 05/10/2012
Note
Godkänd; 2012; 20121012 (johhir)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-07-10Bibliographically approved
Hirche, J., Bomark, P., Bauer, M. & Solyga, P. (2008). Adaptive interface for text input on large-scale interactive surfaces (ed.). In: (Ed.), (Ed.), 2008 IEEE International Workshop on Horizontal Interactive Human-Computer System: Amsterdam, Netherlands, 1 - 3 October 2008. Paper presented at IEEE International Workshop on Horizontal Interactive Human-Computer Systems : 01/10/2008 - 03/10/2008 (pp. 163-166). Piscataway, NJ: IEEE Communications Society
Open this publication in new window or tab >>Adaptive interface for text input on large-scale interactive surfaces
2008 (English)In: 2008 IEEE International Workshop on Horizontal Interactive Human-Computer System: Amsterdam, Netherlands, 1 - 3 October 2008, Piscataway, NJ: IEEE Communications Society, 2008, p. 163-166Conference paper, Published paper (Refereed)
Abstract [en]

In this paper we present a novel approach to text input on large interactive surfaces using a combination of strategies to resolve the inherent difficulties with text input on such a device. Instead of using a conventional full size QWERTY based layout, the idea is to use a very limited set of buttons that, by using word prediction and hints, would only require minimal finger movement. The input mechanism is somewhat related to input methods employed when using keyboards with a limited size and amount of keys, commonly found in phones and other 10 digit keyboards. Given that the main motivation to this approach was not the limited size but rather to overcome the difficult task of locating keys with fingers on a flat and featureless surface, making touchtyping very difficult and requiring frequent visual monitoring of the finger position, we opted to enhance the interaction with easily made gestures, a layout that adapts to the hand anatomy of the user, and easy control over the text prediction.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE Communications Society, 2008
National Category
Media and Communication Technology
Research subject
Mobile and Pervasive Computing
Identifiers
urn:nbn:se:ltu:diva-29603 (URN)10.1109/TABLETOP.2008.4660198 (DOI)57749210426 (Scopus ID)31ffa030-9ead-11dd-a113-000ea68e967b (Local ID)978-1-4244-2897-7 (ISBN)31ffa030-9ead-11dd-a113-000ea68e967b (Archive number)31ffa030-9ead-11dd-a113-000ea68e967b (OAI)
Conference
IEEE International Workshop on Horizontal Interactive Human-Computer Systems : 01/10/2008 - 03/10/2008
Note
Godkänd; 2008; 20081020 (johhir)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-05-09Bibliographically approved
Meißner, M., Doggett, M., Kanus, U., Hirche, J. & Straßer, W. (2008). Efficient Space Leaping for Raycasting Architectures (ed.). In: (Ed.), Klaus Mueller (Ed.), Volume graphics 2001 in Stony Brook: proceedings of the Joint IEEE TCVG and Eurographics Workshop in Stony Brook, New York, USA, June 21 - 22, 2001, Eurographics. Paper presented at International Workshop on Volume Graphics : 21/07/2001 - 22/07/2001. Wien: Encyclopedia of Global Archaeology/Springer Verlag
Open this publication in new window or tab >>Efficient Space Leaping for Raycasting Architectures
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2008 (English)In: Volume graphics 2001 in Stony Brook: proceedings of the Joint IEEE TCVG and Eurographics Workshop in Stony Brook, New York, USA, June 21 - 22, 2001, Eurographics / [ed] Klaus Mueller, Wien: Encyclopedia of Global Archaeology/Springer Verlag, 2008Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Wien: Encyclopedia of Global Archaeology/Springer Verlag, 2008
Identifiers
urn:nbn:se:ltu:diva-34329 (URN)880c2e60-49b9-11dd-a9fb-000ea68e967b (Local ID)321183737X (ISBN)880c2e60-49b9-11dd-a9fb-000ea68e967b (Archive number)880c2e60-49b9-11dd-a9fb-000ea68e967b (OAI)
Conference
International Workshop on Volume Graphics : 21/07/2001 - 22/07/2001
Note
Upprättat; 2001; 20080704 (johhir)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-05-09Bibliographically approved
Kugler, A. & Hirche, J. (2008). Texturing ASIC specification (ed.). Paper presented at . Tübingen, Germany: Wilhelm Schickard Institute for Computer Science, University of Tübingen
Open this publication in new window or tab >>Texturing ASIC specification
2008 (English)Report (Other academic)
Place, publisher, year, edition, pages
Tübingen, Germany: Wilhelm Schickard Institute for Computer Science, University of Tübingen, 2008
Identifiers
urn:nbn:se:ltu:diva-24697 (URN)c18222f0-49c1-11dd-a9fb-000ea68e967b (Local ID)c18222f0-49c1-11dd-a9fb-000ea68e967b (Archive number)c18222f0-49c1-11dd-a9fb-000ea68e967b (OAI)
Note
Upprättat; 1998; 20080704 (johhir)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-05-09Bibliographically approved
Amor, M., Boo, M., Straβer, W. & Hirche, J. (2005). A meshing scheme for efficient hardware implementation of butterfly subdivision using displacement mapping (ed.). Paper presented at . IEEE Computer Graphics and Applications, 25(2), 46-59
Open this publication in new window or tab >>A meshing scheme for efficient hardware implementation of butterfly subdivision using displacement mapping
2005 (English)In: IEEE Computer Graphics and Applications, ISSN 0272-1716, E-ISSN 1558-1756, Vol. 25, no 2, p. 46-59Article in journal (Refereed) Published
Abstract [en]

Displacement mapping is an effective technique for encoding the high levels of detail of surface models using coarse triangle meshes and displacement maps. These maps are 2D representations containing the distances between the coarse mesh and the surface to represent. Displacement maps have been used in many applications such as ray tracing, image warping, and volume rendering. In this article, we propose modifications to our previous grouping strategy, a new subdivision strategy based on the Modified Butterfly algorithm and new heuristics for the adaptive subdivision procedure, and, finally, the corresponding modifications on our hardware proposal. A meshing scheme and an adaptive subdivision strategy based on displacement mapping reduce the bottleneck between the CPU and graphics pipeline common in high-performance graphics systems.

Identifiers
urn:nbn:se:ltu:diva-7187 (URN)10.1109/MCG.2005.30 (DOI)582994c0-b64d-11dd-9c2e-000ea68e967b (Local ID)582994c0-b64d-11dd-9c2e-000ea68e967b (Archive number)582994c0-b64d-11dd-9c2e-000ea68e967b (OAI)
Note
Upprättat; 2005; 20081119 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-05-09Bibliographically approved
Hirche, J., Ehlert, A., Guthe, S. & Doggett, M. (2004). Hardware accelerated per-pixel displacement mapping (ed.). In: (Ed.), Wolfgang Heidrich (Ed.), Graphics Interface 2004: proceedings ; London, Ontario, 17 - 19 May 2004. Paper presented at Graphics Interface 2004 : 17/05/2004 - 19/05/2004 (pp. 153-158). : A K Peters
Open this publication in new window or tab >>Hardware accelerated per-pixel displacement mapping
2004 (English)In: Graphics Interface 2004: proceedings ; London, Ontario, 17 - 19 May 2004 / [ed] Wolfgang Heidrich, A K Peters , 2004, p. 153-158Conference paper, Published paper (Refereed)
Abstract [en]

In this paper we present an algorithm capable of rendering a displacement mapped triangle mesh interactively on latest GPUs. The algorithm uses only pixel shaders and does not rely on adaptively adding geometry. All sampling of the displacement map takes place in the pixel shader and bi- or trilinear ltering can be applied to it, and at the same time as the calculations are done per pixel in the shader, the algorithm has automatic level of detail control. The triangles of the base mesh are extruded along the respective normal directions and then the resulting prisms are rendered by casting rays inside and intersecting them with the displaced surface. Two different implementations are discussed in detail.

Place, publisher, year, edition, pages
A K Peters, 2004
Series
ACM International Conference Proceeding Series ; 62
Identifiers
urn:nbn:se:ltu:diva-30218 (URN)3f814be0-b650-11dd-9c2e-000ea68e967b (Local ID)1-56881-227-2 (ISBN)3f814be0-b650-11dd-9c2e-000ea68e967b (Archive number)3f814be0-b650-11dd-9c2e-000ea68e967b (OAI)
Conference
Graphics Interface 2004 : 17/05/2004 - 19/05/2004
Note
Upprättat; 2004; 20081119 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-05-09Bibliographically approved
Hirche, J. & Ehlert, A. (2003). Curvature maps (ed.). Paper presented at . Tübingen, Germany: Wilhelm Schickard Institute for Computer Science, University of Tübingen
Open this publication in new window or tab >>Curvature maps
2003 (English)Report (Other academic)
Place, publisher, year, edition, pages
Tübingen, Germany: Wilhelm Schickard Institute for Computer Science, University of Tübingen, 2003
Identifiers
urn:nbn:se:ltu:diva-24685 (URN)c11bdfb0-49c4-11dd-a9fb-000ea68e967b (Local ID)c11bdfb0-49c4-11dd-a9fb-000ea68e967b (Archive number)c11bdfb0-49c4-11dd-a9fb-000ea68e967b (OAI)
Note
Upprättat; 2003; 20080704 (johhir)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-05-09Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-3598-0750

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