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| 2. |
- Aad, G., et al.
(författare)
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- 2014
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Tidskriftsartikel (refereegranskat)
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| 3. |
- Ye, Xiaozhen, et al.
(författare)
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Flow Experience Detection and Analysis for Game Users by Wearable-Devices-Based Physiological Responses Capture
- 2021
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Ingår i: IEEE Internet of Things Journal. - : IEEE. - 2327-4662. ; 8:3, s. 1373-1387
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Tidskriftsartikel (refereegranskat)abstract
- Relevant research has shown the potential to understand the game user experience (GUX) more accurately and reliably by measuring the user’s psychophysiological responses. However, the current studies are still very scarce and limited in scope and depth. Besides, the low-detection accuracy and the common use of the professional physiological signal apparatus make it difficult to be applied in practice. This article analyzes the GUX, particularly flow experience, based on users’ physiological responses, including the galvanic skin response (GSR) and heart rate (HR) signals, captured by low-cost wearable devices. Based on the collected data sets regarding two test games and the mixed data set, several classification models were constructed to detect the flow state automatically. Hereinto, two strategies were proposed and applied to improve classification performance. The results demonstrated that the flow experience of game users could be effectively classified from other experiences. The best accuracies of two-way classification and three-way classification under the support of the proposed strategies were over 90% and 80%, respectively. Specifically, the comparison test with the existing results showed that Strategy1 could significantly reduce the negative interference of individual differences in physiological signals and improve the classification accuracy. In addition, the results of the mixed data set identified the potential of a general classification model of flow experience.
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| 6. |
- van Noort, Michiel, et al.
(författare)
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Stokes imaging polarimetry using image restoration at the Swedish 1-m solar telescope
- 2008
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 489:1, s. 429-440
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Tidskriftsartikel (refereegranskat)abstract
- Aims. We aim to achieve both high spatial resolution and high polarimetric sensitivity, using an earth-based 1m-class solar telescope, for the study of magnetic fine structure on the surface of the Sun. Methods: We use a setup with 3 high-speed, low-noise cameras to construct datasets with interleaved polarimetric states, particularly suitable for Multi-Object Multi-Frame Blind Deconvolution image restorations. We discuss the polarimetric calibration routine and various potential sources of error in the results. Results: We obtained near diffraction limited images, which have a noise level of ≈ 10-3 I_cont. We confirm that dark cores have a weaker magnetic field and a lower inclination angle with respect to the solar surface than the edges of the penumbral filament. We demonstrate that the magnetic field strength in faculae-striations is significantly lower than in other nearby parts of the faculae.
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| 7. |
- van Noort, R, et al.
(författare)
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An overview of the current status of national reporting systems for adverse reactions to dental materials.
- 2004
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Ingår i: Journal of Dentistry. - : Elsevier BV. - 0300-5712 .- 1879-176X. ; 32:5, s. 351-358
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: Since all dental materials pose a potential risk to patients and members of the dental team, the post-market monitoring of adverse reactions caused by dental materials should be considered essential. This article reviews the current status of post-market monitoring of adverse reactions to dental materials and highlights some of the issues that arise in trying to establish an evidence base on the characteristics of adverse reactions to dental materials. METHODS: Norway, Sweden and more recently the UK have sought to monitor adverse reactions to dental materials systematically and proactively in an effort to add to the evidence base on the safety of dental materials. Their experiences in undertaking post-market surveillance have been combined in preparing this article. RESULTS: To date the Norwegian, Swedish and the UK projects has received 1268 reports over 11 years, 848 reports over 5.5 years and 1117 reports over 3 years, respectively, relating to adverse reactions seen or experienced by dental personnel and patients. Presently, there are no harmonized criteria for what can be classified as an adverse reaction related to dental materials. Under reporting is a recognised problem and lack of awareness and lack of clarity as to what constitutes an adverse reaction may be contributory factors. A pro-active reporting system takes a considerable time to become established, but can generate a lot of potentially useful information. CONCLUSIONS: There is a need to raise the awareness among dental professionals of the potential for adverse reactions due to dental materials and to develop an internationally accepted system of data gathering that can produce the evidence that reflect the extent, severity and incidence of adverse reactions to dental materials.
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| 8. |
- Clark, Angel, et al.
(författare)
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Development of a Base Model in RMS and EMT Environment to Study Low Inertia System
- 2021
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Ingår i: IEEE General Meeting Power& Energy Society. - : Institute of Electrical and Electronics Engineers (IEEE).
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Konferensbidrag (refereegranskat)abstract
- This research performs a detailed comparison of fundamental frequency positive sequence (RMS) and electromagnetic transient (EMT) based simulations of a two-area four-machine system with power-electronics based non-synchronous generation (NSG). The RMS based simulations are performed in PowerFactory and the equivalent EMT simulations are performed in PSCAD. Parity between the two-area four-machine model constructed in PSCAD and PowerFactory is rigorously established. The default fully rated wind converter model from PowerFactory with fault ride through is adopted in PSCAD, utilizing the same control strategy. The transient stability of the two-area four-machine model with NSG in PSCAD and PowerFactory is evaluated with respect to one another. Specific RMS modeling limitations are also discussed in this paper.
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| 9. |
- Kann, Viggo
(författare)
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KTHs morfologiska och lexikografiska verktyg och resurser (Morphological and lexicographical tools and resources from KTH)
- 2010
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Ingår i: LexicoNordica. - 0805-2735 .- 1891-2206. ; 17, s. 99-117
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- During the last 15 years the human language technology group at KTH has developed tools and resources that may have interest to the lexicographical community. Several tools were developed as part of the group's research on Swedish authoring tools: spelling error detection and correction, grammar checking, part-of-speech tagging, lemmatization, compound splitting, and an interactive learning environment called Grim. Most of the tools are made open source and may be downloaded from www.csc.kth.se/theory/humanlang We have also made several dictionaries available on the web: the Lexin series of dictionaries for 15 languages, the Scandinavian Dictionary, the Tvärslå dictionary collection, the Swedish Hyphenation Dictionary and the two crowd sourced resources The People's Dictionary of Synonyms and The People's English-Swedish Dictionary.
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| 10. |
- Eidevåg, Tobias, 1987, et al.
(författare)
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Collisional damping of spherical ice particles
- 2021
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Ingår i: Powder Technology. - : Elsevier BV. - 0032-5910 .- 1873-328X. ; 383, s. 318-327
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents experimental values for the coefficient of restitution (e(n)) for millimeter-sized ice particles colliding with massive walls at different temperatures. Three different wall materials are tested: hardened glass, ice and Acrylonitrile butadiene styrene (ABS) polymer. The results show a high sensitivity to impact velocity V-i, where e(n) decreases rapidly with increasing V-i. The results also show a decrease in e(n) with increasing temperature T. A novel model that predicts e(n) based on the assumption of collisional melting and viscous damping caused by an increased premelted liquid-layer, is proposed. The model predicts both the velocity and the temperature trends seen in the experiments. The difference obtained in experiments between wall materials is also captured by the new model. A generalized regime map for ice particle collisions is proposed to combine the new model with previous work. (C) 2021 The Author(s).
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