| 1. |
- Fernström, Ingela, et al.
(författare)
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Bildpedagogiska processer på distans under pandemin : Dilemman och utvecklingspotential
- 2023
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Syftet med rapporten är att beskriva hur undervisning och examination i ämnet bildpedagogik påverkats av att genomföras helt på distans under pandemiåren 2020–2021. Rapporten bygger på semistrukturerade intervjuer med samtliga lärare som undervisade i bildpedagogik vid Högskolan i Gävle under pandemiåren. Intervjuerna fokuserade på undervisning, examination och framåtblick. I en tematisk innehållsanalys togs teman fram under dessa rubriker. Resultatet visar att all undervisning och examination i bildpedagogik inte går att genomföra digitalt på distans med bibehållen kvalité. Delar av den digitala undervisningen som generellt fungerar väl är föreläsningar och individuell handledning. I bildpedagogisk undervisning länkas teori och praktik samman. Under pandemin har det praktiska arbetet påverkats negativt och därmed har också kopplingen till teoretiska perspektiv försvagats. Den digitala undervisningen under pandemin har inneburit merarbete för lärare i ämnet då nya eller omformulerade uppgifter och examinationer har behövt tas fram.
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| 2. |
- De Angelis, Alessio, et al.
(författare)
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A flexible UWB sensor for indoor localization
- 2012
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Ingår i: 2012 IEEE I2MTC - International Instrumentation and Measurement Technology Conference, Proceedings. - : IEEE. - 9781457717710 ; , s. 2357-2360
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Konferensbidrag (refereegranskat)abstract
- This paper presents a research activity aimed at developing an Ultra-Wideband sensor for personnel indoor localization, based on the round trip time measurement of Ultra-Wideband pulses. An approach combining flexibility, high measurement update rate and asynchronous operation with digital processing capability has been employed in the design of the sensor. The principle of operation of the proposed sensor, the architecture of the realized in-house test bed and the experimental setup are described and discussed.
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| 3. |
- Perez, A. E. Garcia, et al.
(författare)
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A new sample of extremely/ultra metal-poor stars
- 2008
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Ingår i: Physica Scripta. - 0031-8949 .- 1402-4896. ; T133, s. 014036-
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Tidskriftsartikel (refereegranskat)abstract
- A sample of 30 very metal-poor stars from the Hamburg-European Southern Observatory (ESO) objective-prism survey have been observed at high spectral resolution at the Very Large Telescope (VLT) using the Ultraviolet and Visual Echelle Spectrograph (UVES). Two of the observed stars are very interesting not only because of their very low iron content, approximately four orders of magnitude lower than the solar value, but also because we detected the neutral lithium resonance line at 670.8 nm. Hydrogen lines suggest that the two observed stars have effective temperatures around 6000-6250K and according to isochrones, they are either on the main-sequence or on the subgiant branch, in which case they would probably be the most metal-poor dwarfs or warm subgiants with lithium detections known. These detections would allow to determine more accurately the slope of the trend of the lithium abundance with [Fe/H] than was possible with samples of unevolved stars restricted to higher metallicities.
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| 4. |
- Zobel, Thomas
(författare)
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The 'pros' and 'cons' of joint EMS and group certification : a Swedish case study
- 2007
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Ingår i: Corporate Social Responsibility and Environmental Management. - : Wiley. - 1535-3958 .- 1535-3966. ; 14:3, s. 152-66
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Tidskriftsartikel (refereegranskat)abstract
- Small and medium-sized enterprises (SMEs) are collectively responsible for a significant portion of the total environmental burden worldwide. A common tool used by SMEs to improve their environmental performance is the environmental management system (EMS), which has the disadvantage that it has been developed with larger organizations in mind. A common approach used by Swedish SMEs to facilitate the implementation of an EMS is joint EMS and group certification. This paper evaluates this approach by means of a case study. It is found that the approach is effective for small and micro-sized companies in achieving ISO 14001 certification as fast and cost effectively as possible. A few short cuts including joint environmental policy and objectives and insufficient environmental organization are however threatening to undermine the trustworthiness of the approach. Notwithstanding these flaws, however, it must be concluded that the joint EMS approach is a good alternative for small and micro-sized companies.
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| 5. |
- Coll Ferrari, María Teresa
(författare)
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Effect of austenitising temperature and cooling rate on microstructures of hot-work tool steels
- 2015
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The average size of hot-work tools has gradually increased over the past years.This affects the effective temperature cycle tools experience during hardening,as large dimensions prevent uniform and rapid cooling, and thereby the resulting microstructures and properties. In order to avoid the formation of coarse structures or cracking during heat treatment it has become common practise to lower the austenitising temperature below that recommended by the steel manufacturer.In this work, therefore, the effects of austenitising at temperatures lower thancommonly recommended are investigated. Three 5% Cr hot-work tool steelsalloyed with Mo and V were heat treated, resulting microstructures andtempering carbides were studied and transformation characteristics determined for different austenitising temperatures and different cooling rates. The temperatures and cooling rates have been chosen to be representative for heat treatments of different sizes of tools. Bainite rather than martensite formed during slow cooling regardless of austenitising temperature. A lowered austenitising temperature produced largeramounts of both bainite and retained austenite while a higher caused graingrowth. Carbon partitioning during the bainitic transformation resulted in anincrease of the carbon content in the retained austenite of at least 0.3 wt.%. The austenitising temperature influences also the type and amount of tempering carbides that precipitate, which affects the properties of the steel. Higher austenitising temperatures favour the precipitation of MC carbides during tempering. The Mo rich M2C type carbides were proven to be more prone to coarsening during service at 560°C-600°C, while V rich MC carbides preserve their fine distribution. A best practice heat treatment needs to balance the increase of grain size with increasing austenitising temperatures, with the possibility to form more tempering carbides. Higher austenitising temperatures also give less retained austenite, which can affect dimensional stability and toughness negatively after tempering
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| 6. |
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| 7. |
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| 8. |
- Nji, Emmanuel, et al.
(författare)
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An engineered thermal-shift screen reveals specific lipid preferences of eukaryotic and prokaryotic membrane proteins
- 2018
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Ingår i: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 9
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Tidskriftsartikel (refereegranskat)abstract
- Membrane bilayers are made up of a myriad of different lipids that regulate the functional activity, stability, and oligomerization of many membrane proteins. Despite their importance, screening the structural and functional impact of lipid-protein interactions to identify specific lipid requirements remains a major challenge. Here, we use the FSEC-TS assay to show cardiolipin-dependent stabilization of the dimeric sodium/proton antiporter NhaA, demonstrating its ability to detect specific protein-lipid interactions. Based on the principle of FSECTS, we then engineer a simple thermal-shift assay (GFP-TS), which facilitates the highthroughput screening of lipid-and ligand-interactions with membrane proteins. By comparing the thermostability of medically relevant eukaryotic membrane proteins and a selection of bacterial counterparts, we reveal that eukaryotic proteins appear to have evolved to be more dependent to the presence of specific lipids.
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| 9. |
- Pellfolk, Tony, 1976-
(författare)
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Physical restraint use and falls in institutional care of old people : effects of a restraint minimization program
- 2010
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Physical restraint use and falls are common in institutional care of old people and various attempts have been made to reduce their occurrence. Falls and concomitant injuries are a major problem due to their negative effect on morbidity and mortality. Prevention of falls and injuries is the most common reason for physically restraining old people in institutional care. Its use has, however, been questioned both from an ethical perspective, since restraints can be perceived as coercive and also because of the lack of sound evidence of their effectiveness in preventing falls, as well as the adverse effects associated with their use. The main purposes of this thesis were to investigate differences in the us of physical restraints over time, to identifify risk factors for falls among people with dementia, to evaluate the effects of a restraint minimization program on staff knowledge, attitudes, and work environment and use of physical restraints and the quality of care. The present thesis is based on three main data collections, two census surveys conducted within institutional care for old people in the county of Västerbotten in 2000 (n=3,804) and 2007 (n=2,970) and one cluster-Randomized Controlled Trial (RCT) including 40 group dwellings for people suffering from dementia where the intervention consisted of staff education. The use of physical restraints increased slightly between 2000 and 2007 (16.2% to 18.4%, p=0.016). Analyses suggest that the increase might be independent of any change in resident characteristics. Restrained residents were also subjected to restraints for longer times in 2007. During a six-month follow-up 64/160 (40.0%) residents in group dwellings for those with dementia sustained at least one fall. Independent risk factors for falls were ‘requiring help with hygiene’, ‘displaying verbally disruptive/attention-seeking behavior’, ‘able to rise from a chair’, ‘walking with assistive devices’, and ‘participating in outdoor walks’, which explained 36.1% of the falls. The majority of the 191 falls were un-witnessed, 35% occurred during the night and anxiety and confusion were the most common symptoms preceding the falls. A six-month restraint minimization program showed a positive impact on staff knowledge, attitudes and work environment as well as on the use of physical restraints and subjectively estimated quality of care. Residents in the intervention group present throughout the entire study period had lower odds, relative to the residents in the control group of being physically restrained at follow-up (OR= 0.21, CI 95%=0.08-0.57) after controlling for potential confounders and the cluster effect. Adjusted analyses including all residents present at either baseline or follow-up also showed that the use of physical restraints was less in the intervention group relative to the control group at follow-up. There was no change in the occurrence of falls or use of psychoactive drugs. The intervention also reduced stress of conscience, job demands and strain in the staff, and improved their job control and the caring climate. Subgroup analysis indicated a greater effect in units where the use of physical restraints had been reduced or remained constant. In conclusion, physical restraint use and falls remains common in institutional care of old people. The practice of physical restraint seems to have changed. In the RCT it was found that it is possible to change restraint practice and also to improve staff work environment. Falls among residents with dementia require a certain mobility function and anxiety and confusion are common symptoms preceding falls.
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