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- Bååth, Lars B., et al.
(author)
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Surface topography with PDI holography
- 2008
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In: Proceedings of the XII. International Colloquium on Surfaces. - Aachen : Shaker Verlag. - 9783832269128 ; , s. 10-
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Conference paper (other academic/artistic)abstract
- This paper presents topographic measurements of metal surface with Point Diffraction Interferometer (PDI) technique. Interferogram of a surface is created and recorded with different phase offsets. These are then combined to create a phase offset map of the surface. We demonstrate the use with the presentation of our first surface topographic map
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| 4. |
- Ihlström Eriksson, Carina, et al.
(author)
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Multi-users and Multi-contextuality – A Mobile Tourism Setting
- 2007
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In: Human-Computer Interaction, Pt 4, Proceedings: HCI Applications and Services. - Berlin : Springer. - 9783540731092 - 3540731091 ; , s. 48-57
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Conference paper (peer-reviewed)abstract
- This paper reports from an initial stage of a Swedish project concerning mobile IT support for tourism. From three workshops with actors within the tourism sector we identified barriers and challenges in designing IT support for all phases of the tourist life cycle. Thereafter we designed and evaluated a mobile tourism guide in real life setting with six different user groups. The research question of this paper is: What factors influence the design of mobile services to be used by multi-users in multiple contexts? The initial findings show that indeed there are several design challenges regarding e.g. a) the visibility of the content of the screen when multi-users are simultaneously using the service, b) the audibility of the speaker voice in the service when used in a surrounding with traffic noise, c) providing optional designs for different context, i.e. indoors/outdoors etc, and d) providing personalization options for different group sizes.
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- Pignaton de Freitas, Edison, et al.
(author)
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Real-time Support in Adaptable Middleware for Heterogeneous Sensor Networks
- 2008
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In: 2008 International Multiconference on Computer Science and Information Technology. - Piscataway, NJ : IEEE Press. - 9788360810149 ; , s. 593-600
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Conference paper (peer-reviewed)abstract
- The use of sensor networks in different kinds of sophisticated applications is emerging due to several advances in sensor/embedded system technologies. However, the integration and coordination of heterogeneous sensors is still a challenge, especially when the target application environment is susceptible to changes. Such systems must adapt themselves in order to fulfil increasing requirements. Especially the handling of real-time requirements is a challenge in this context in which different technologies are applied to build the overall system. Moreover, these changing scenarios require services located at different places during the system runtime. Thus a support for adaptability is needed. Timing and precision requirements play an important role in such scenarios. Besides, QoS management must provide the necessary support to offer the flexibility demanded in such scenarios. In this paper we present the real-time perspective of a middleware that aims at providing the support required by sophisticated heterogeneous sensor network applications. We propose to address the real-time concerns by using the OMG Data Distribution Service for Real-time Systems approach, but with a more flexible approach that fits in the heterogeneous environment in which the proposed middleware is intended to be used. We also present a coordination protocol to support the proposed approach.
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| 6. |
- Premaratne, Hemakumar Lalith
(author)
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Recognition of printed Sinhala characters by direction fields
- 2005
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Doctoral thesis (other academic/artistic)abstract
- Although substantial research has been carried out on Optical Character Recognition (OCR) where a printed or a handwritten document of script is read as an image and converted to the editable text format, for various languages during the last 30 years, majority of Brahmi descended south Asian scripts are yet to achieve a commercial OCR system.
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| 7. |
- Bell, Linda, et al.
(author)
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A Comparison of Disfluency Distribution in a Unimodal and a Multimodal Speech Interface
- 2000
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In: Proceedings of ICSLP 00.
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Conference paper (peer-reviewed)abstract
- In this paper, we compare the distribution of disfluencies in two human--computer dialogue corpora. One corpus consists of unimodal travel booking dialogues, which were recorded over the telephone. In this unimodal system, all components except the speech recognition were authentic. The other corpus was collected using a semi-simulated multi-modal dialogue system with an animated talking agent and a clickable map. The aim of this paper is to analyze and discuss the effects of modality, task and interface design on the distribution and frequency of disfluencies in these two corpora.
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| 8. |
- Friberg, Anders, et al.
(author)
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CUEX: An algorithm for automatic extraction of expressive tone parameters in music performance from acoustic signals
- 2007
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In: Acta Acoustica united with Acustica. - 1610-1928 .- 1861-9959. ; 93:3, s. 411-420
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Journal article (peer-reviewed)abstract
- CUEX is an algorithm that from recordings of solo music performances extracts the tone parameters for tempo, sound level, articulation, onset velocity, spectrum, vibrato rate, and vibrato extent. The aim is to capture the expressive variations in a music performance, rather than to identify the musical notes played. The CUEX algorithm uses a combination of traditional methods to segment the audio stream into tones based on fundamental frequency contour and sound level envelope. From the resulting onset and offset positions, the different tone parameters are computed. CUEX has been evaulated using both synthesized performances and recordings of human performances. For the synthesized performances, tone recognition of 98.7% was obtained on average. The onset and offset precision was 8 ms and 20 ms, respectively, and sound level precision about 1 dB. For human performances, the recognition rate was 91.8 % on average. Various applications of the CUEX algorithm are discussed.
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| 9. |
- Frykfors, Carl-Otto T, et al.
(author)
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Reframing the multilevel triple helix in a regional innovation system: a case of systemic foresight and regimes in renewal of Skåne's food industry
- 2010
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In: Technology Analysis & Strategic Management. - : Taylor & Francis. - 0953-7325 .- 1465-3990. ; 22:7, s. 819-829
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Journal article (peer-reviewed)abstract
- Most findings on the triple helix system derive from studies based on high-tech sectors, and seldom so on traditional industries. A foresight exercise aimed at renewal of the mature food industry in the Skane region in southern Sweden was conducted in 2006-2007. The findings suggest that a multilevel triple helix policy ought to be used in a systemic way from a bottom up perspective, including companies as well as other triple helix actors throughout the value chain. Further, the findings underscore the importance of the role intermediaries play enhancing the integrative abilities of actors in the regional food system. Cultural analysis is used to elicit a deeper understanding of the different regimes that influence the actors. This is consistent with the observation highlighted in this article that the actors in the food system bear values arising from a time when the Swedish food system catered for national self-sufficiency under a regime of limited market competition.
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