| 1. |
- Adibekyan, V., et al.
(author)
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Sun-like stars unlike the Sun : Clues for chemical anomalies of cool stars
- 2017
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In: Astronomical Notes - Astronomische Nachrichten. - : WILEY-V C H VERLAG GMBH. - 0004-6337 .- 1521-3994. ; 338:4, s. 442-452
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Journal article (peer-reviewed)abstract
- We present a summary of the splinter session Sun-like stars unlike the Sun that was held on June 9, 2016, as part of the Cool Stars 19 conference (Uppsala, Sweden), in which the main limitations (in the theory and observations) in the derivation of very precise stellar parameters and chemical abundances of Sun-like stars were discussed. The most important and most debated processes that can produce chemical peculiarities in solar-type stars were outlined and discussed. Finally, in an open discussion between all the participants, we tried to identify new pathways and prospects toward future solutions of the currently open questions.
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| 2. |
- Ahlberg, Carl, et al.
(author)
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The Black Pearl: An Autonomous Underwater Vehicle
- 2013
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Reports (other academic/artistic)abstract
- The Black Pearl is a custom made autonomous underwater vehicle developed at Mälardalen University, Sweden. It is built in a modular fashion, including its mechanics, electronics and software. After a successful participation at the RoboSub competition in 2012 and winning the prize for best craftsmanship, this year we made minor improvements to the hardware, while the focus of the robot's evolution shifted to the software part. In this paper we give an overview of how the Black Pearl is built, both from the hardware and software point of view.
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| 4. |
- Appelros, Peter, et al.
(author)
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Trends in baseline patient characteristics during the years 1995-2008 : observations from Riks-Stroke, the Swedish Stroke Register.
- 2010
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In: Cerebrovascular Diseases. - : S. Karger AG. - 1015-9770 .- 1421-9786. ; 30:2, s. 114-119
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Journal article (peer-reviewed)abstract
- BACKGROUND: Reported improvements in outcome in stroke patients treated in hospital are often attributed to advances in stroke care. However, secular trends in patient characteristics that are present already on admission to hospital may also contribute to improved outcome. METHODS: Time trends for baseline data (289,854 stroke admittances) in Riks-Stroke, the Swedish national quality register for stroke care, were analyzed for the years 1995 through 2008. The following data were included: number of strokes for each year, age, sex, risk factors, stroke subtype, stroke severity, functional status and need of external home service before the stroke. RESULTS: The number of annually reported strokes increased until 2005. The proportion of recurrent strokes decreased from 28.0 to 25.9%. The mean age at first-ever stroke increased in women, but not in men. The proportion of smokers dropped, and the proportion of patients who had treated hypertension increased. The stroke severity decreased in men. The prestroke functional status (walking, dressing, toileting) improved in both sexes over these years. More patients lived alone in 2008 than in 1995, and more had home help service. CONCLUSIONS: Many baseline parameters in Riks-Stroke have changed over the years. This has consequences for the interpretation of outcome data. Some changes may be due to inclusion bias, others due to alterations in general health, evolution of vascular risk factors or demographics.
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| 5. |
- Appelros, Peter, 1953-, et al.
(author)
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Trends in Stroke Treatment and Outcome between 1995 and 2010 : Observations from Riks-Stroke, the Swedish Stroke Register
- 2014
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In: Cerebrovascular Diseases. - : S. Karger AG. - 1015-9770 .- 1421-9786. ; 37:1, s. 22-29
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Journal article (peer-reviewed)abstract
- Background: Continuous changes in stroke treatment and care, as well as changes in stroke characteristics, may alter stroke outcome over time. The aim of this paper is to describe time trends for treatment and outcome data, and to discuss if any such changes could be attributed to quality changes in stroke care. Methods: Data from Riks-Stroke, the Swedish stroke register, were analyzed for the time period of 1995 through 2010. The total number of patients included was 320,181. The following parameters were included: use of computed tomography (CT), stroke unit care, thrombolysis, medication before and after the stroke, length of stay in hospital, and discharge destination. Three months after stroke, data regarding walking, toileting and dressing ability, as well social situation, were gathered. Survival status after 7, 27 and 90 days was registered. Results: In 1995, 53.9% of stroke patients were treated in stroke units. In 2010 this proportion had increased to 87.5%. Fewer patients were discharged to geriatric or rehabilitation departments in later years (23.6% in 2001 compared with 13.4% in 2010), but more were discharged directly home (44.2 vs. 52.4%) or home with home rehabilitation (0 vs. 10.7%). The need for home help service increased from 18.2% in 1995 to 22.1% in 2010. Regarding prevention, more patients were on warfarin, antihypertensives and statins both before and after the stroke. The functional outcome measures after 3 months did improve from 2001 to 2010. In 2001, 83.8% of patients were walking independently, while 85.6% were independent in 2010. For toileting, independence increased from 81.2 to 84.1%, and for dressing from 78.0 to 80.4%. Case fatality (CF) rates after 3 months increased from 18.7% (2001) to 20.0% (2010). This trend is driven by patients with severe strokes. Conclusions: Stroke outcomes may change over a relatively short time period. In some ways, the quality of care has improved. More stroke patients have CT, more patients are treated in stroke units and more have secondary prevention. Patients with milder strokes may have benefited more from these measures than patients with severe strokes. Increased CF rates for patients with severe stroke may be caused by shorter hospital stays, shorter in-hospital rehabilitation periods and lack of suitable care after discharge from hospital.
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| 6. |
- Asplund, Andreas, et al.
(author)
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Att läsa och lära på distans! : vilka möjligheter ger den nya tekniken?
- 2000
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Reports (pop. science, debate, etc.)abstract
- Denna skrift är ett delresultat av det IT-projekt vid Högskolan i Gävle (HiG), som arbetat med IT och distansutbildning. Projektet har varit verksamt under 1997-2000 och finansierats av KK-stiftelsen, Länsstyrelsen i Gävleborg, EU (Sociala fonden) samt av HiG. Projektets syfte har varit att, via Internet, driva utvecklingen av distansutbildning framåt. Internetbaserade lösningar för förmedling av digital information öppnar ständigt nya möjligheter för både distansstudenten och den lärare som undervisar på distans. Huvudmålet har varit att tillgängliggöra de nya verktygen för genomförande och distribution av distansundervisning. Vi har haft som delmål att sprida erfarenheter och reflektioner gjorda i projektet. I denna skrift har vi samlat tankar och idéer från lärare och andra engagerade i projektet. Skriften är ett sätt för oss att nå ut till dig som på något sätt kommer, eller har kommit, i kontakt med distansundervisning i någon form. Vi vill på detta sätt dela med oss av vårt arbete. Vår förhoppning är att inspirera Dig, som av olika skäl inte har möjlighet att studera på traditionellt sätt, att studera på distans, och till Dig som undervisar på högskola eller universitet hoppas vi kunna vara en källa till att väcka nya idéer för skapande av en mer flexibel undervisning. Vi har varit många personer som deltagit i projektet på ett eller annat sätt. Många erfarenheter har gjorts och ofta har det legat mycket vilja, iver och entusiasm bakom våra resultat. Utan hänförda projektdeltagare hade inte denna skrift blivit av överhuvudtaget. Jag vill härmed rikta ett stort TACK till alla Er som arbetet i projektet under den här tiden!
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| 7. |
- Asplund, H, et al.
(author)
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Clustering of scatterers in mobile radio channels - Evaluation and modeling in the COST259 Directional Channel Model
- 2002
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In: ; , s. 901-905
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Conference paper (peer-reviewed)abstract
- We analyze the clustering of scatterers in mobile radio channels, i.e, the fact that scatterers are usually not located uniformly in the whole coverage area, but tend to occur in clusters. While this has been recognized for some time, a realistic model for this phenomenon has been lacking up to now. We first analyze measurements to extract the distribution of the number of observed clusters. We then present a model that reflects not only this distribution, but also reproduces the appearance and disappearance of clusters as the mobile station moves through the cell. Our approach has been adopted as an important part of the COST259 directional channel model, a standard model for directional mobile radio channels. Finally, we discuss the implications of the model for the system performance of CDMA and SDMA systems.
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| 8. |
- Asplund, Henrik, et al.
(author)
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The COST 259 Directional Channel Model-Part II : Macrocells
- 2006
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In: IEEE Transactions on Wireless Communications. - 1536-1276 .- 1558-2248. ; 5:12, s. 3434-3450
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Journal article (peer-reviewed)abstract
- This paper describes the attributes of the COST 259 directional channel model that are applicable for use in the design and implementation of macrocellular mobile and portable radio systems and associated technology. Special care has been taken to model all propagation mechanisms that are currently understood to contribute to the characteristics of practical macrocellular channels and confirm that large scale, small scale, anddirectional characteristics of implemented models are realistic through their comparison with available measured data. The model that is described makes full use of previously published work, as well as incorporating some new results. It is considered that its implementation should contribute to a tool that can be used for simulations and comparison of different aspects of a large variety of wireless communication systems, including those that exploit the spatial aspects of radio channels, as, for example, throughthe use of adaptive antenna systems.
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