| 1. |
- Al Rukn, S, et al.
(författare)
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Stroke in the Middle-East and North Africa: A 2-year prospective observational study of stroke characteristics in the region-Results from the Safe Implementation of Treatments in Stroke (SITS)-Middle-East and North African (MENA)
- 2019
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Ingår i: International journal of stroke : official journal of the International Stroke Society. - : SAGE Publications. - 1747-4949. ; 14:7, s. 715-722
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Tidskriftsartikel (refereegranskat)abstract
- Stroke incidence and mortality are reported to have increased in the Middle-East and North African (MENA) countries during the last decade. This was a prospective observational study to examine the baseline characteristics of stroke patients in the MENA region and to compare the MENA vs. the non-MENA stroke cohort in the Safe Implementation of Treatments in Stroke (SITS) International Registry. Results Of the 13,822 patients with ischemic and hemorrhagic stroke enrolled in the SITS-All Patients Protocol between June 2014 and May 2016, 5897 patients (43%) were recruited in MENA. The median onset-to-door time was 5 h (IQR: 2:20–13:00), National Institutes of Health Stroke Scale (NIHSS) score was 8 (4–13) and age was 65 years (56–76). Hypertension (66%) and diabetes (38%) were the prevailing risk factors; large artery stenosis > 50% (25.3%) and lacunar strokes (24.1%) were the most common ischemic stroke etiologies. In comparison, non-MENA countries displayed an onset-to-door time of 5:50 h (2:00–18:45), a median of NIHSS 6 (3–14), and a median age of 66 (56–76), with other large vessel disease and cardiac embolism as the main ischemic stroke etiologies. Hemorrhagic strokes (10%) were less common compared to non-MENA countries (13.9%). In MENA, only a low proportion of patients (21%) was admitted to stroke units. Conclusions MENA patients are slightly younger, have a higher prevalence of diabetes and slightly more severe ischemic strokes, commonly of atherosclerotic or microvascular etiology. Admission into stroke units and long-term follow-up need to be improved. It is suspected that cardiac embolism and atrial fibrillation are currently underdiagnosed in MENA countries.
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| 2. |
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| 3. |
- Chiquet, Christophe, et al.
(författare)
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Acute postoperative endophthalmitis : Microbiology from the laboratory to the bedside
- 2022
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Ingår i: Survey of Ophthalmology. - : Elsevier BV. - 0039-6257. ; 67:6, s. 1698-1710
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Forskningsöversikt (refereegranskat)abstract
- Postoperative endophthalmitis is a dreaded complication of intraocular surgery. Acute presentations need prompt management and good knowledge of differential diagnoses. In the last 10 years, progress in direct microbial detection and identification from intraocular samples included the use of blood culture systems and, more recently, matrix-assisted laser desorption ionization time-of-flight mass spectrometry, improving the rate of bacterial identification. Whatever the method used, diagnostic sensitivity is better for vitreous samples than for aqueous humor samples. Besides, molecular biology techniques have further improved the identification rate of infectious agents in intraocular samples. They also provide faster results compared to culture-based techniques. Quantitative real-time PCR (qPCR) can also determine the bacterial load in intraocular samples. Several studies have shown that intraocular bacterial loads in endophthalmitis patients are usually high, which helps differentiating infection from contamination. The prognostic value of qPCR remains to be validated. Whole genome DNA sequencing technologies facilitate direct and sequencing of single DNA molecules. They have the potential to increase the rate of microbiological identification. Some antibiotic resistance markers (e.g., methicillin resistance in staphylococci and vancomycin resistance in enterococci) may be detected earlier using molecular techniques (usually real-time PCR tests). Early determination of the involved microorganism and their antibiotic resistances can help establishing an earlier therapeutic strategy.
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| 4. |
- Chiquito, Alex, 1994-, et al.
(författare)
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Access Control Model for Time Series Databases using NGAC
- 2020
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Ingår i: Proceedings. - : IEEE. ; , s. 1001-1004
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Konferensbidrag (refereegranskat)abstract
- In Industry 4.0 and Industrial Internet of Things (IIoT), large amounts of time-series sensor data is collected from devices and machines. Industrial data typically contain sensitive information that may harm the data owner should it leaks. Although such risks exist, selected data frequently needs to be shared in partner eco-systems to take advantage of expertise in analyzing the data and to synchronize between partners collaborating in the production system. Consequently, access control must support efficient data selection and sharing. The access control should be capable of managing and enforcing access policies for different operations and with different levels of granularity, while being simple to properly maintain and potentially automate. In this paper we examine the possible use of Next-Generation Access Control (NGAC) for such access control. NGAC is an attribute-based access control (ABAC) standard based on relations between data elements to create, manage and enforce access control policies. We propose an Access control model that maps the NGAC policy language to thequerylanguageoftime-seriesdatabasestofacilitateasecure and efficient data sharing system for IIoT sensor data
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| 5. |
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| 6. |
- Grankvist, Gunne, 1963-
(författare)
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An Examination of Swedish Human Resource Management Students' Beliefs about What Work Should Ideally Be Like
- 2015
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Ingår i: International Journal of Social Science Studies. - : Redfame Publishing. - 2324-8033 .- 2324-8041. ; 3:4, s. 166-171
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Tidskriftsartikel (refereegranskat)abstract
- Human Resource Management students' beliefs about how work should be organised will influence their behaviour in future professional positions. This prompted a study in which students in a three-year programme in Human Resource Management at University West in Sweden commented on a number of statements about what work should ideally be like. All 140 respondents were born between 1978 and 1990 and hence belong to Generation Y, also known as Generation Me. The respondents generally agreed strongly with humanistic beliefs about work and female students agreed with humanistic beliefs to a far greater extent than male students.
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| 7. |
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| 8. |
- Isaksson, Mikael, et al.
(författare)
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On the quantitative molecular analysis of electronic energy transfer within donor–acceptor pairs
- 2007
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Ingår i: Physical Chemistry, Chemical Physics - PCCP. - : Royal Society of Chemistry (RSC). - 1463-9076 .- 1463-9084. ; 9, s. 1941-51
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Tidskriftsartikel (refereegranskat)abstract
- An extended Förster theory (EFT) on electronic energy transfer is presented for the quantitative analysis of time-resolved fluorescence lifetime and depolarisation experiments. The EFT, which was derived from the stochastic Liouville equation, yields microscopic information concerning the reorientation correlation times, the order parameters, as well as inter chromophoric distances. Weakly interacting donor and acceptor groups, which reorient and interact in a pair wise fashion, are considered, under isotropic and anisotropic conditions. For the analysis of experiments it is shown that not only do we need to consider the orientational distributions of the transition dipoles, but the internal reorienting molecular dynamics within the pair which is of even greater importance. The latter determines the shape as well as the rate of the observed donor fluorescence and depolarisation decays, which are most often not mono-exponential functions. It is shown that the commonly used Förster theory is a special case of the EFT. Strategies are presented for applying the EFT, which makes use of Brownian dynamics simulation.
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| 9. |
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| 10. |
- Kakarla, Ravikiran, 1990, et al.
(författare)
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Phase noise characteristics of injection-locked lasers operated at low injection powers
- 2018
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Ingår i: 2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings. - 9781943580385
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Konferensbidrag (refereegranskat)abstract
- Optical injection locking at -65 dBm input power is demonstrated by using an electrical phase-locked loop and an EDFA pre-amplifier. A slave laser output phase noise below 6 degrees (rms) was confirmed.
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| 11. |
- Karlsson, Per Erik, 1957, et al.
(författare)
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Impact of ozone on the growth of birch (Betula pendula) saplings
- 2003
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Ingår i: Environmental Pollution. - 0269-7491. ; 124:3, s. 485-495
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Tidskriftsartikel (refereegranskat)abstract
- Saplings of one half-sib family of birch, Betula pendula, were exposed to three levels of ozone in open-top chambers (OTCs) during two growing seasons 1997-1998. The ozone treatments were non-filtered air (NF, accumulated daylight AOT40 over the two growing seasons of 3.0 mul l(-1) h), non-filtered air with extra ozone (NF +, accumulated daylight AOT40 of 27.3 mul l(-1) h) and nonfiltered air with additional extra ozone (NF++, accumulated daylight AOT40 of 120 mul l(-1) h), The birch saplings, including the roots, were harvested after the first and second growing seasons. After the first growing season, the NF++ treatment reduced the total wood biomass by 22%, relative to the NF treatment. There was no further reduction of the total wood biomass in the NF++ treatment after the second growing season. The root biomass was reduced by 30% after the first growing season. The shoot/root ratio, as well as the proportional biomass of leaves, were increased by ozone during both years. The ozone impact on the relative growth rate was estimated to -2% per 10 mul l(-1) h daylight AOT40 per growing season. (C) 2003 Elsevier Science Ltd. All rights reserved.
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| 12. |
- Nilsson, Joakim, 1989-, et al.
(författare)
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Maximal Q Factor for an On-Chip, Fuse-Based Trimmable Capacitor
- 2019
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Ingår i: Electronics. - Basel, Switzerland : MDPI. - 2079-9292. ; 8:1
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents a circuit for realising a fuse-programmable capacitor on-chip. The trimming mechanism is implemented using integrated circuit fuses which can be blown in order to lower the resulting equivalent capacitance. However, for integrated circuits, the non-zero fuse resistance for active fuses and finite fuse resistance for blown fuses limit the Q factor of the resulting capacitor. In this work, we present a method on how to arrange the fuses in order to achieve maximal worst-case Q factor for the given circuit topology given the process parameters and requirements on capacitance. We also analyse and discuss the accuracy and limitations of the topology with regard to fuse resistance and parasitic elements such as bond pads.
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| 13. |
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| 14. |
- Ottosson, Jan, 1958-, et al.
(författare)
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Förord
- 2014. - 1
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Ingår i: Mästarens återkomst. - : Dialogos Förlag. - 9789175042763 ; , s. 9-11
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 15. |
- Rafiq, T, et al.
(författare)
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Study of the parametric dependence of linear and nonlinear microtearing modes in conventional tokamak discharges
- 2018
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Ingår i: Physics of Plasmas. - : AIP Publishing. - 1089-7674 .- 1070-664X. ; 25:1
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Tidskriftsartikel (refereegranskat)abstract
- A reduced transport model for microtearing modes is developed for use in integrated predictive modeling studies, employing a unified fluid/kinetic approach to derive the nonlinear dispersion relation. This approach advances the kinetic description and allows the inclusion of nonlinear effects due to magnetic fluctuations. In this numerical study, the dependence of the microtearing mode real frequency and growth rate on plasma parameters and on DIII-D like L-mode and H-mode plasma profiles is examined. The magnetic fluctuation strength as well as electron thermal diffusivity due to microtearing modes is computed. The saturated amplitude of the magnetic fluctuations is calculated utilizing numerically determined microtearing mode eigenvalues in the nonlinear microtearing modes envelope equation. It is found that the electron temperature gradient in the presence of moderate collision frequency is required for the microtearing mode to become unstable. The effects of small and large collisionality and small and large wavenumbers on microtearing modes are found to be stabilizing, while the effects of density gradient, plasma beta, low current density, and large magnetic shear are found to be destabilizing. The microtearing mode growth rate, magnetic fluctuation strength, as well as electron thermal diffusivity is found to be larger in the H-mode plasma than in the L-mode plasma.
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| 16. |
- Sandelin, Bo, 1942
(författare)
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Samuel von Pufendorf
- 2017
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Ingår i: Film från jubileumskonferens i Lund 6 oktober 2017.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 17. |
- Sandelin, Bo, 1942
(författare)
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Skriv brev på esperanto
- 1985
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Ingår i: Dagen 1985-07-19.
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Recension (övrigt vetenskapligt/konstnärligt)abstract
- Recension av Inga Johansson & Åsa Salquist: Skriv brev på esperanto
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| 18. |
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| 19. |
- Sandell, Klas, et al.
(författare)
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Educational potentials of encounters with nature : reflections from a Swedish outdoor perspective
- 2010
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Ingår i: Environmental Education Research. - Oxfordshire, United Kingdom : Routledge. - 1350-4622 .- 1469-5871. ; 16:1, s. 113-132
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Tidskriftsartikel (refereegranskat)abstract
- Direct encounters with the natural environment have a long tradition in environmental education. Given that the role and character of these encounters are shaped by the approach taken to environmental or sustainability education, there is a risk that a shift towards pluralistic and political approaches will lead to a neglect of nature encounters. On the basis of an analysis of Swedish/Scandinavian outdoor and environmental history and current Swedish outdoor education practice, we suggest six potentials of encounters with nature: (1) an experience-based meaning of nature; (2) a relational ethical perspective; (3) the addition of a fourth perspective to sustainable development; (4) human ecology in practice; (5) sensing the quality of a simple life; and (6) democracy, identity and dwelling. We argue that these potentials widen the scope of environmental and sustainability education, while highlighting the need for a situated, dynamic and process-oriented concept of nature, rather than a static one in which nature is understood as a particular place or specific organisms.
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| 20. |
- Sandell, Klas, 1953-
(författare)
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Ekostrategier, humanekologi och friluftsliv
- 1995
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Ingår i: Humanekologi: meddelanden från Nordisk förening för humanekologi. - Lund : Nordisk förening för humanekologi. - 1100-4258. ; 14:3/4, s. 11-22
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 21. |
- Sandell, Kerstin, 1963-
(författare)
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Enkla tekniker och besvärliga frågor : att arbeta med Donna Haraway
- 2005. - 1
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Ingår i: Att utmana vetandets gränser. - Malmö : Liber. - 9147074973 - 9789147074976 ; , s. 75-90
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Är du intresserad av den feministiska debatten om metodologi och epistemologi? Då är det här boken för dig - om metod, metodologi och kunskap.Läs merBoken består av tre delar. Först uppmärksammas några av de metodologiska utmaningar och begränsningar som författarna konfronterats med i sitt arbete. Sedan diskuteras forskningsprocessen som en reflekterande praktik. I bokens avslutande del belyses det kunskapsbärande subjektet.
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| 22. |
- Sandell, Klas
(författare)
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Ett reservatsdilemma : Kiruna nationalparksförslag 1986-1989 och makten över fjällen som fritidslandskap
- 2000
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Rapport (populärvet., debatt m.m.)abstract
- I den här boken tar docent Klas Sandell upp det dilemma som ligger i att inrätta eller inte inrätta reservat, särskilt nationalparker. Han menar att det är ett dilemma genom att flera och delvis motstridiga reservatsintressen ställs mot varandra (t ex naturskydd och turism) men också genom att reservatet ställs mot andra intressen (t ex allemansrätt och lokala fritidsaktiviteter). Syftet med boken är att belysa svenska reservatsbildningar, särskilt nationalparkers, etablering och roll och fokusera på naturturism, friluftsliv, utvecklingsperspektiv och allemansrätt. Detta illustreras med hjälp av en fallstudie av Kirunaparksförslagets uppgång och fall under perioden 1986 – 1989. I korthet gick det aktuella nationalparksförslaget ut på att etablera en ovanligt stor nationalpark i Kirunafjällen och göra en kraftig satsning på turism och på nya typer av planering och skötsel. Efter en mycket intensiv debatt las förslaget på is. Spänningarna mellan olika intressen och oförenliga syften var för stora. Klas Sandell menar att det är viktigt att studera nationalparksförslaget i Kiruna och vad som då hände för att om vi inte lär oss att förebygga och hantera grundkonflikterna, så riskerar de att ständigt återkomma. Rapporten är därför ett viktigt underlag för nu pågående, och framöver återkommande konflikter kring reservatsetableringar. Inte minst genom att lyfta fram ett antal tankar och förslag om en Allemansrättens renässans blir detta ett led i diskussionen om hur vi i framtiden ska hantera reservatens roll – och för vem!
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| 23. |
- Sandell, Klas, et al.
(författare)
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Framtida forskningsstrukturer för friluftsliv och naturturism i Sverige - Ett diskussionsunderlag : Forskningsprogrammet Friluftsliv i förändring, rapport nr. 17
- 2011
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- En av uppgifterna som forskningsprogrammet "Friluftsliv i Förändring" (FiF) har är att ta fram ett diskussions- och beslutsunderlag angående framtida forskningsstrukturer för friluftsliv och naturturism i Sverige. Den här rapporten sammanfattar det underlag som hittills har samlats in i form av workshops, presentationer och diskussioner i olika konstellationer. Detta diskussionsunderlag kommer att vara en plattform för det fortsatta arbetet som slutligen kommer att avrapporteras hösten 2012. Utifrån de underlag som hittills samlats in konstateras i rapporten bl.a.: att friluftslivet i förhållande till sin samhällsroll och forskningspotential i övrigt är ett starkt underbeforskat fält i Sverige och att FiF därför måste ses som en inventerande startpunkt – inte en slutpunkt – i förhållande till forskningsbehoven. Detta intryck förstärks av att den då aktuella utlysningen innehöll medvetna avgränsningar samt att ett uttalat syfte för detta första större forskningsprogram om friluftsliv i Sverige var att etablera grundläggande kunskaper om fältet som en bas för fortsatt forskning. Utifrån dessa konstateranden identifieras och diskuteras ett antal val och handlingsalternativ. Rapporten avslutas med en serie preliminära slutsatser varifrån bl.a. följande kan noteras: ␣ att det är viktigt att bevaka ämnesfältets bredd och mångvetenskapliga karaktär; ␣ att en långsiktigt stabil förvaltning av nu uppbyggda kommunikationsstrukturer i form av årliga konferenser, hemsida, informationsbaser och populärvetenskaplig kunskapsspridning är central, liksom att etablera en långsiktigt stabil insamling och kontextualisering av statistik; ␣ att den institutionella strukturen sannolikt bäst byggs upp som ett nätverk av en handfull tematiska nationella centra tillsammans med en nationellt koordinerande centralnod som har särskilt ansvar för kommunikationsstrukturer och statistikinsamling enligt ovan; ␣ att en basfinansierad nationell mångvetenskaplig forskarskola bör inrättas; och ␣ att FiFs ekonomiska omsättning (ca 6 Mkr/år) bör ses som en miniminivå, 10-15 Mkr/år som mer rimligt, och ett antal särskilt angelägna forskningsområden indikeras likaså.
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| 24. |
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| 25. |
- Sandell, Klas
(författare)
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Friluftsliv och miljöengagemang
- 1996
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Ingår i: Natur og friluftsliv i byens nÏrmiljø. Tema Nord, 1996:518, Nordisk ministerråd, København, s. 51-64.
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 26. |
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| 27. |
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| 28. |
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| 29. |
- Van Chien, Trinh, 1989-, et al.
(författare)
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Joint Power Allocation and User Association Optimization for Massive MIMO Systems
- 2016
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Ingår i: IEEE Transactions on Wireless Communications. - : IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. - 1536-1276 .- 1558-2248. ; 15:9, s. 6384-6399
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Tidskriftsartikel (refereegranskat)abstract
- This paper investigates the joint power allocation and user association problem in multi-cell Massive MIMO (multiple-input multiple-output) downlink (DL) systems. The target is to minimize the total transmit power consumption when each user is served by an optimized subset of the base stations (BSs), using non-coherent joint transmission. We first derive a lower bound on the ergodic spectral efficiency (SE), which is applicable for any channel distribution and precoding scheme. Closed-form expressions are obtained for Rayleigh fading channels with either maximum ratio transmission (MRT) or zero forcing (ZF) precoding. From these bounds, we further formulate the DL power minimization problems with fixed SE constraints for the users. These problems are proved to be solvable as linear programs, giving the optimal power allocation and BS-user association with low complexity. Furthermore, we formulate a max-min fairness problem that maximizes the worst SE among the users, and we show that it can be solved as a quasi-linear program. Simulations manifest that the proposed methods provide good SE for the users using less transmit power than in small-scale systems and the optimal user association can effectively balance the load between BSs when needed. Even though our framework allows the joint transmission from multiple BSs, there is an overwhelming probability that only one BS is associated with each user at the optimal solution.
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| 30. |
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