| 1. |
- Ekblom Bak, Elin, 1981-, et al.
(författare)
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Accelerometer derived physical activity and subclinical coronary and carotid atherosclerosis : cross-sectional analyses in 22 703 middle-aged men and women in the SCAPIS study
- 2023
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Ingår i: BMJ Open. - : BMJ Publishing Group Ltd. - 2044-6055. ; 13:11
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: The aim included investigation of the associations between sedentary (SED), low-intensity physical activity (LIPA), moderate-to-vigorous intensity PA (MVPA) and the prevalence of subclinical atherosclerosis in both coronaries and carotids and the estimated difference in prevalence by theoretical reallocation of time in different PA behaviours.DESIGN: Cross-sectional.SETTING: Multisite study at university hospitals.PARTICIPANTS: A total of 22 670 participants without cardiovascular disease (51% women, 57.4 years, SD 4.3) from the population-based Swedish CArdioPulmonary bioImage study were included. SED, LIPA and MVPA were assessed by hip-worn accelerometer.PRIMARY AND SECONDARY OUTCOMES: Any and significant subclinical coronary atherosclerosis (CA), Coronary Artery Calcium Score (CACS) and carotid atherosclerosis (CarA) were derived from imaging data from coronary CT angiography and carotid ultrasound.RESULTS: High daily SED (>70% ≈10.5 hours/day) associated with a higher OR 1.44 (95% CI 1.09 to 1.91), for significant CA, and with lower OR 0.77 (95% CI 0.63 to 0.95), for significant CarA. High LIPA (>55% ≈8 hours/day) associated with lower OR for significant CA 0.70 (95% CI 0.51 to 0.96), and CACS, 0.71 (95% CI 0.51 to 0.97), but with higher OR for CarA 1.41 (95% CI 1.12 to 1.76). MVPA above reference level, >2% ≈20 min/day, associated with lower OR for significant CA (OR range 0.61-0.67), CACS (OR range 0.71-0.75) and CarA (OR range 0.72-0.79). Theoretical replacement of 30 min of SED into an equal amount of MVPA associated with lower OR for significant CA, especially in participants with high SED 0.84 (95% CI 0.76 to 0.96) or low MVPA 0.51 (0.36 to 0.73).CONCLUSIONS: MVPA was associated with a lower risk for significant atherosclerosis in both coronaries and carotids, while the association varied in strength and direction for SED and LIPA, respectively. If causal, clinical implications include avoiding high levels of daily SED and low levels of MVPA to reduce the risk of developing significant subclinical atherosclerosis.
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| 2. |
- Ahmad, Irma, et al.
(författare)
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High prevalence of persistent symptoms and reduced health-related quality of life 6 months after COVID-19
- 2023
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Ingår i: Frontiers in Public Health. - : Frontiers Media S.A.. - 2296-2565. ; 11
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The long-term sequelae after COVID-19 constitute a challenge to public health and increased knowledge is needed. We investigated the prevalence of self-reported persistent symptoms and reduced health-related quality of life (HRQoL) in relation to functional exercise capacity, 6 months after infection, and explored risk factors for COVID-19 sequalae.METHODS: This was a prospective, multicenter, cohort study including 434 patients. At 6 months, physical exercise capacity was assessed by a 1-minute sit-to-stand test (1MSTST) and persistent symptoms were reported and HRQoL was evaluated through the EuroQol 5-level 5-dimension (EQ-5D-5L) questionnaire. Patients with both persistent symptoms and reduced HRQoL were classified into a new definition of post-acute COVID syndrome, PACS+. Risk factors for developing persistent symptoms, reduced HRQoL and PACS+ were identified by multivariable Poisson regression.RESULTS: Persistent symptoms were experienced by 79% of hospitalized, and 59% of non-hospitalized patients at 6 months. Hospitalized patients had a higher prevalence of self-assessed reduced overall health (28 vs. 12%) and PACS+ (31 vs. 11%). PACS+ was associated with reduced exercise capacity but not with abnormal pulse/desaturation during 1MSTST. Hospitalization was the most important independent risk factor for developing persistent symptoms, reduced overall health and PACS+.CONCLUSION: Persistent symptoms and reduced HRQoL are common among COVID-19 survivors, but abnormal pulse and peripheral saturation during exercise could not distinguish patients with PACS+. Patients with severe infection requiring hospitalization were more likely to develop PACS+, hence these patients should be prioritized for clinical follow-up after COVID-19.
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| 3. |
- Berntsson, Thore, 1947, et al.
(författare)
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Towards Sustainabel Oil Refinery - Pre-study for larger co-operation project
- 2008
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- In this report, the Chalmers EnergiCentrum (CEC) presents the results of a pre-study commissioned by Preem relating to the effective production of future vehicle fuels.This pre-study was made up of three studies focusing on energy streamlining, the utilisation of waste heat and carbon-dioxide separation and biorefinement relating to the gasification and hydration of vegetable oils. One of the common starting points for these studies was the current situation at the Preem refineries in Göteborg and Lysekil from where the measurement data were obtained and analysed. The report summarises the knowledge situation based on current research in the individual technical fields. The results present some interesting future opportunities for developing the sustainable production of future vehicle fuels. The sections vary, as the areas that have been examined differ and the sections have been written by different people. The reports ends with some joint conclusions and a number of questions which could be included and answered in a more extensive future main study, as part of a developed research partnership between Preem and the Chalmers University of Technology. The preliminary results of this work were analysed with the client at workshops on 1 October and 29 November 2007. The report is written in English combined with an extensive summary in Swedish including a proposal on a future main study. The study was conducted by the Chalmers EnergiCentrum (CEC), in collaboration with a number of researchers in the CEC’s network. They included Thore Berntsson, Jessica Algehed, Erik Hektor and Lennart Persson Elmeroth, all from Heat and Power Technology, Börje Gevert, Chemical and Biological Engineering, Tobias Richards, Forest Products and Chemical Engineering, Filip Johnsson and Anders Lyngfelt, Energy Technology, and Per-Åke Franck and Anders Åsblad, CIT Industriell Energianalys AB. The client, Preem, was represented by Bengt Ahlén, Sören Eriksson, Johan Jervehed, Bertil Karlsson, Gunnar Olsson, Ulf Kuylenstierna, Stefan Nyström, Martin Sjöberg and Thomas Ögren. Tobias Richards was responsible for compiling the report and Bertil Pettersson was the project manager.
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| 4. |
- Larsson, Bengt, et al.
(författare)
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Molecular oxygen in the rho Ophiuchi cloud
- 2007
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Ingår i: Astronomy & Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 466:3, s. 5-
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Tidskriftsartikel (refereegranskat)abstract
- Context: Molecular oxygen, O2, has been expected historically to be an abundant component of the chemical species in molecular clouds and, as such, an important coolant of the dense interstellar medium. However, a number of attempts from both ground and from space have failed to detect O2 emission.Aims: The work described here uses heterodyne spectroscopy from space to search for molecular oxygen in the interstellar medium. Methods: The Odin satellite carries a 1.1 m sub-millimeter dish and a dedicated 119 GHz receiver for the ground state line of O2. Starting in 2002, the star forming molecular cloud core ρ Oph A was observed with Odin for 34 days during several observing runs.Results: We detect a spectral line at v_LSR =+3.5 km s-1 with Δ v_FWHM=1.5 km s-1, parameters which are also common to other species associated with ρ Oph A. This feature is identified as the O2 (NJ = 11 - 1_0) transition at 118 750.343 MHz.Conclusions: The abundance of molecular oxygen, relative to H{2} , is 5 × 10-8 averaged over the Odin beam. This abundance is consistently lower than previously reported upper limits.Based on observations with Odin, a Swedish-led satellite project funded jointly by the Swedish National Space Board (SNSB), the Canadian Space Agency (CSA), the National Technology Agency of Finland (Tekes) and Centre National d'Étude Spatiale (CNES). The Swedish Space Corporation has been the industrial prime contractor and also is operating the satellite. Appendix A is only available in electronic form at http://www.aanda.org
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| 5. |
- Liljas, Juvas Marianne, et al.
(författare)
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Högskolan Dalarna och folkskoleseminariets historia - Perspektiv på lärarutbildningen i Falun, ca 1875–1970
- 2023
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Ingår i: Svenska Historikermötet i Umeå 14–16 juni 2023. - Umeå.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Svenska Historikermötet i Umeå 14–16 juni 2023Titel: Högskolan Dalarna och folkskoleseminariets historia – Perspektiv på lärarutbildningen i Falun, ca 1875–1970Den som har inflytande över utformandet av en lärarutbildning och blivande lärares kunskapssyn, kan också komma att påverka framtida generationers sätt att se på samhället och världen (Hartman 2012, Bejerot & Hasselbladh 2020). Vid folkskoleseminariet i Falun bedrevs lärarutbildning från etablerandet 1875 fram till det att verksamheten succesivt övergick i lärarhögskolans regi 1968–70. I en mening sammanfaller dessa nära på hundra år av lärarutbildning därmed också med framväxten av det moderna Sverige.I antologiprojektet ’Högskolan Dalarna och folkskoleseminariets historia’ riktas fokus mot en rad tidigare outforskade aspekter av hur seminarietraditionen, i ett specifikt lokalsamhälle, etableras och förändras under olika tidsperioder. Enligt tidigare forskning hade den 1842 inrättade folkskolan uppgiften att legitimera ett traditionellt, religiöst och auktoritärt samhällssystem (Petterson 1993, Lundahl 2005). Längre fram i tiden, inte minst från sekelskiftet 1900 och framåt, kom folkskolan dock att alltmer betraktas som ett centralt redskap i det moderna samhällets utvecklande av medborgares agens, kvinnlig frigörelse och samhällsutveckling (Linne 1996). Under femton år med start 1864 etablerades i Sverige fem folkskoleseminarier för kvinnor. Först ut var Stockholm och Skara som 1864 ombildades från att utbilda män till att utbilda kvinnor. Därefter etablerades folkskollärarinneseminarier i både Falun och Kalmar år 1875 och fyra år senare följde ett femte i Umeå (Sörensen 1942). Seminarieetableringarna i Falun och övriga orter innebar en ökning i andelen kvinnliga lärare under slutet av 1800-talet och i förlängningen kom den patriarkala skolordningen att utmanas (Florin 1987).Beslutet den 30 april 1875 att anlägga ett folkskoleseminarium i Falun, säger något om behovet av lärare på den svenska landsbygden, men också något om Faluns historiska bakgrund som lärdomsstad (Claesson 2015, Liljas 2019:2021, Ödman 1995). Möjligen finns också lokala och aktörsburna förklaringar till den utpräglat progressiva profil som med tiden kom att växa fram vid folkskoleseminariet i Falun (Linné 1996:2006). I projektets delstudier görs exempel på pregnanta avsteg från folkskolans normer av framträdande lärarutbildare som Valborg Olander och Anna Sörensen. Med utgångspunkt i ett mycket rikt arkivmaterial blir det också möjligt att följa hur de och andra lärarutbildare i valet av uppgifter och utformningen av textnära kommentarer söker påverka de blivande lärarinnorna i deras sätt att se på kunskap, undervisning och lärarskap. Utifrån än mer kritiskt orienterade perspektiv på verksamheten granskas också urvalsprinciperna för rekryteringen av nya lärarinnor och interkulturella aspekter av den faktiska verksamheten.Genom dessa nedslag berörs därmed också hur professionaliseringen av läraryrket tar form i relation till ett bildningsanspråk - vilket ofta tycks gravitera mot medborgerliga och könsutjämnande principer. Under den föreslagna sessionen till historikermötet i Umeå presenteras fem av dessa bidrag:Juvas Marianne Liljas presentation fokuserar på Valborg Olanders (1861-1943) reformerande insatser vid folkskoleseminariet i Falun och har titeln ’’’Det varma hjärtat”: Valborg Olanders pedagogiska arv i Faluseminariets historia’.I presentationen ’Folkskolelärarinneseminarier i Sverige: en jämförelse mellan Falun och Umeå, 1875–1915’ intar Emil Marklund en komparativ ansats. Folkskollärarinneseminariet i Umeå grundades 1879, blott fyra år efter seminariet i Falun. Utifrån rubriken ’Kunskaps- och undervisningsideal i förändring: Pedagogiska examensuppsatser vid Falu folkskoleseminarium 1915–1937’ analyserar Anders Persson de skriftliga kommentarer som dåtidens lärarutbildare lämnar på de blivande lärarinnornas texter.I ´En lärare blir till. Om ideal och normer för blivande lärare på folkskollärarseminariet i Falun år 1876–1909´presenterar Ulrika Norburg exempel på hur rekryteringsprocessen av blivande lärarinnor vid seminariet gick till.Anders Blomqvist presentation ’Perspektiv på seminariet i krigs- och brytningstider 1940–1960: genus, klass och etnicitet’ fokuserar på erfarenheter från Faluseminariet under tiden för Andra världskriget och efterföljande år. Ordförande: Simon Lundberg, Umeå universitet.Discussant: Anna Götlind, Stockholms universitet.
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| 6. |
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| 7. |
- Axelsson, Emil, 1978, et al.
(författare)
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Feldspar: A Domain Specific Language for Digital Signal Processing algorithms
- 2010
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Ingår i: Eighth ACM/IEEE International Conference on Formal Methods and Models for Codesign. - 9781424478859 ; , s. 169-178
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Konferensbidrag (refereegranskat)abstract
- A new language, Feldspar, is presented, enabling high-level and platform-independent description of digital signal processing (DSP) algorithms. Feldspar is a pure functional language embedded in Haskell. It offers a high-level dataflow style of programming, as well as a more mathematical style based on vector indices. The key to generating efficient code from such descriptions is a high-level optimization technique called vector fusion. Feldspar is based on a low-level, functional core language which has a relatively small semantic gap to machine-oriented languages like C. The core language serves as the interface to the back-end code generator, which produces C. For very small examples, the generated code performs comparably to hand-written C code when run on a DSP target. While initial results are promising, to achieve good performance on larger examples, issues related to memory access patterns and array copying will have to be addressed.
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| 8. |
- Axelsson, Emil, 1978, et al.
(författare)
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The Design and Implementation of Feldspar: An Embedded Language for Digital Signal Processing
- 2011
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Ingår i: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). - Berlin, Heidelberg : Springer Berlin Heidelberg. - 1611-3349 .- 0302-9743. - 9783642242755 ; 6647, s. 121-136
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Konferensbidrag (refereegranskat)abstract
- Feldspar is a domain specific language, embedded in Haskell, for programming digital signal processing algorithms. The final aim of a Feldspar program is to generate low level code with good performance. Still, we chose to provide the user with a purely functional DSL. The language is implemented as a minimal, deeply embedded core language, with shallow extensions built upon it. This paper presents full details of the essential parts of the implementation. Our initial conclusion is that this approach works well in our domain, although much work remains.
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| 9. |
- Axelsson, Emil, 1978, et al.
(författare)
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The Design and Implementation of Feldspar: an Embedded Language for Digital Signal Processing
- 2010
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Ingår i: IFL 2010, the 22nd Symposium on Implementation and Application of Functional Languages.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Feldspar is a Domain Specific Language, embedded in Haskell, for programming Digital Signal Processing algorithms. The final aim of a Feldspar program is to generate low level code with good performance. Still, we chose to provide the user with a purely functional DSL. The language is implemented as a minimal, deeply embedded core language, with shallow extensions built upon it. This paper presents full details of the essential parts of the implementation. Our initial conclusion is that this approach works well in our domain, although much work remains.
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| 10. |
- Backlund, Ulf, et al.
(författare)
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Semi-Bloch functions in several complex variables
- 2013
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Let $M$ be an $n$-dimensional complex manifold. A holomorphic function $f:M\to \mathbb C$ is said to be semi-Bloch if for every $\lambda\in \mathbb C$ the function $g_\lambda=\exp(\lambda f(z))$ is normal on $M$. We characterise Semi-Bloch functions on infinitesimally Kobayashi non-degenerate $M$ in geometric as well as analytic terms. Moreover, we show that on such manifolds, semi-Bloch functions are normal.
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