| 1. |
- Atoufi, Zhaleh, et al.
(author)
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Surface tailoring of cellulose aerogel-like structures with ultrathin coatings using molecular layer-by-layer assembly
- 2022
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In: Carbohydrate Polymers. - : Elsevier BV. - 0144-8617 .- 1879-1344. ; 282
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Journal article (peer-reviewed)abstract
- Cellulose nanofibril-based aerogels have promising applicability in various fields; however, developing an effi-cient technique to functionalize and tune their surface properties is challenging. In this study, physically and covalently crosslinked cellulose nanofibril-based aerogel-like structures were prepared and modified by a mo-lecular layer-by-layer (m-LBL) deposition method. Following three m-LBL depositions, an ultrathin polyamide layer was formed throughout the aerogel and its structure and chemical composition was studied in detail. Analysis of model cellulose surfaces showed that the thickness of the deposited layer after three m-LBLs was approximately 1 nm. Although the deposited layer was extremely thin, it led to a 2.6-fold increase in the wet specific modulus, improved the acid-base resistance, and changed the aerogels from hydrophilic to hydrophobic making them suitable materials for oil absorption with the absorption capacity of 16-36 g/g. Thus, demon-strating m-LBL assembly is a powerful technique for tailoring surface properties and functionality of cellulose substrates.
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| 2. |
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Bingsjö360 – Experience Sweden's Bingsjö Folk Music Festival in 360 degrees
- 2019
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Artistic work (film/video)abstract
- Every first Wednesday in July since 1969, Bingsjöstämman (Bingsjö Folk Music Festival) beckons leading folk musicians and folk music enthusiasts from all over Scandinavia to the picturesque village of Bingsjö in Sweden. Over the course of 24 hours, thousands of people gather in fields, barns, campgrounds and historic houses to enjoy scheduled concerts, impromptu musical performances and to participate in traditional dances.Captured at Bingsjöstämman in 2018, Bingsjö360 presents 18 separate video clips which combine 8K resolution VR360 video and ambisonic music recordings to represent the broad range of musical performances on display at the festival. Through this immersive music documentary experience, viewers around the world can experience the sounds, rhythms and unique visual beauty of the festival for themselves.Bingsjö360 presents new creative pathways for representing and sharing folk music tradition through cutting-edge artistic research, immersive audiovisual technology and new modes of audience interaction. By making Bingsjö360 easily accessible through an online video sharing platform, this project also aims to elevate knowledge and perception about immersive audiovisual experiences in wider society.This international artistic research project was instigated at Dalarna Audiovisual Academy at Dalarna University (Falun, Sweden) and produced in collaboration with Folkmusikens Hus, Faraway Productions (Australia), Honeypot Film Productions, Cutting Edge (Australia), Dalarnas Museum, Film i Dalarna and Benny Andersson’s record label Mono Music.
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| 3. |
- Eriksson, Anna, et al.
(author)
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'How can you be friends with that fatty?': The othered body in narratives on weight-based bullying
- 2024
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In: Children & society. - : WILEY. - 0951-0605 .- 1099-0860.
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Journal article (peer-reviewed)abstract
- Weight bias in educational settings can lead to bullying and have a severe negative impact on the mental well-being and educational experiences of school children. Indeed, extensive research has shown that children who are labelled overweight are more likely to be victims of school bullying and that weight-based bullying can lead to loss of self-esteem, lower self-confidence, social isolation, higher levels of anxiety and the development of psychosomatic issues. In this article, we utilise Butler's concepts of performativity and othering to analyse three written narrative accounts of weight-based bullying in schools, published in the Swedish newspaper Aftonbladet. In doing so, we adopt a narrative approach to not only investigate how the narrators depict the bullying they were subjected to in their childhood and the effects it had on them, but also how they position themselves in their narratives. Two themes, 'performative othering' and 'a changeable body', are identified in the narratives. These demonstrate how the narrators were co-constructed as different, othered and dehumanised, and how the normative cruelties to which they were subjected as children served to police their corporeality in line with societal ideals. Taken together, our findings point to the importance of listening to the stories of those subjected to bullying and not only addressing bullying in terms of the negative actions taken, but also in relation to broader societal norms.
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| 4. |
- Eriksson, Andrea, 1977-, et al.
(author)
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Hur olika orsaker påverkar undersköterskor och sjuksköterskor val att sluta vid vårdavdelningar
- 2020
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In: Socialmedicinsk Tidskrift. - 0037-833X .- 2000-4192. ; 97:1, s. 103-116
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Journal article (peer-reviewed)abstract
- Syftet var att studera de främsta orsakerna till varför under- och sjuksköterskor slutade vid vårdavdelningar vid ett svenskt sjukhus och få en förståelse för hur specifika händelser inklusive samspel mellan olika orsaker påverkat val att sluta. Studien bygger på mixed method inklusive enkäter till och intervjuer med undersköterskor och sjuksköterskor som slutat vid fyra avdelningar vid ett svenskt sjukhus mellan åren 2012-2019. De främsta orsakerna till att sluta var personliga skäl, bristande arbetsförutsättningar, bristande möjligheter till återhämtning, lön, möjlighet till utveckling, ledningsbrister samt krav i arbetet. De kvalitativa analyserna i studien visade dock hur de personliga skälen samspelade med organisatoriska krav och förutsättningar. Resultaten pekar på vikten av att utveckla goda arbetsförhållanden för minskad intention att sluta och att ett viktigt led i att förebygga personalomsättning är att ledningen i större utsträckning tar hänsyn till under- och sjuksköterskors åsikter vid förändringsarbete.
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| 5. |
- Eriksson, Anders I., et al.
(author)
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Cold and warm electrons at comet 67P/Churyumov-Gerasimenko
- 2017
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In: Astronomy and Astrophysics. - : EDP SCIENCES S A. - 0004-6361 .- 1432-0746. ; 605
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Journal article (peer-reviewed)abstract
- Context. Strong electron cooling on the neutral gas in cometary comae has been predicted for a long time, but actual measurements of low electron temperature are scarce. Aims. Our aim is to demonstrate the existence of cold electrons in the inner coma of comet 67P/Churyumov-Gerasimenko and show filamentation of this plasma. Methods. In situ measurements of plasma density, electron temperature and spacecraft potential were carried out by the Rosetta Langmuir probe instrument, LAP. We also performed analytical modelling of the expanding two-temperature electron gas. Results. LAP data acquired within a few hundred km from the nucleus are dominated by a warm component with electron temperature typically 5-10 eV at all heliocentric distances covered (1.25 to 3.83 AU). A cold component, with temperature no higher than about 0.1 eV, appears in the data as short (few to few tens of seconds) pulses of high probe current, indicating local enhancement of plasma density as well as a decrease in electron temperature. These pulses first appeared around 3 AU and were seen for longer periods close to perihelion. The general pattern of pulse appearance follows that of neutral gas and plasma density. We have not identified any periods with only cold electrons present. The electron flux to Rosetta was always dominated by higher energies, driving the spacecraft potential to order -10 V. Conclusions. The warm (5-10 eV) electron population observed throughout the mission is interpreted as electrons retaining the energy they obtained when released in the ionisation process. The sometimes observed cold populations with electron temperatures below 0.1 eV verify collisional cooling in the coma. The cold electrons were only observed together with the warm population. The general appearance of the cold population appears to be consistent with a Haser-like model, implicitly supporting also the coupling of ions to the neutral gas. The expanding cold plasma is unstable, forming filaments that we observe as pulses.
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| 6. |
- Freund, Oliver, et al.
(author)
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Impact of the Flow on an Acoustic Excitation System for Aeroelastic Studies
- 2013
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In: Journal of turbomachinery. - : ASME International. - 0889-504X .- 1528-8900. ; 135:3, s. 031033-
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Journal article (peer-reviewed)abstract
- The flow in turbomachines is highly unsteady. Effects like vortices, flow separation, and shocks are an inevitable part of the turbomachinery flow. Furthermore, high blade aspect ratios, aerodynamically highly loaded and thin profiles increase the blade sensitivity to vibrations. According to the importance of aeroelasticity in turbomachines, new strategies for experimental studies in rotating machines must be developed. A basic requirement for aeroelastic research in rotating machines is to be able to excite the rotor blades in a defined manner. Approaches for active blade excitation in running machines may be piezoelectric elements, magnetism, or acoustics. Contact-free excitation methods are preferred, since additional mistuning is brought into the investigated system otherwise. A very promising method for aeroelastic research is the noncontact acoustic excitation method. In this paper, investigations on the influence of an annular cascade flow on the blade vibration, excited by an acoustic excitation system, are presented for the first time. These investigations are carried out at the Aeroelastic Test Rig of the Royal Institute of Technology in Stockholm. By varying the excitation angle, the outlet Mach number, and the relative position of the excited blade to the excitation system, the influence of the flow on the acoustic excitation is quantified. The results show that there is a strong dependency of the excited vibration amplitude on the excitation angle if the outlet Mach number is increased, which implies that preferable excitation directions exist. Furthermore, it is shown that a benefit up to 23% in terms of excited vibration amplitude can be reached if the flow velocity is raised.
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| 7. |
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| 8. |
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| 9. |
- Grumert, Ellen, 1983-, et al.
(author)
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Utvärdering av styrning med variabla hastighetsgränser med fokus på framkomlighet : en fallstudie på E4 vid Södertälje
- 2023
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Reports (other academic/artistic)abstract
- Rapporten är en av två rapporter som beskriver resultatet från det Trafikverksfinansierade projektet Utvärdering av förbättrad motorvägsstyrning – en fallstudie. Projektet har som syfte att ta fram en metodik för att utvärdera före-efterstudier för ITS-åtgärder (Intelligenta Transport Systems-åtgärder) i motorvägsmiljö och applicera metodiken på en teststräcka på E4 vid Södertälje för att utvärdera tillämpbarheten av metoden samt effekter på framkomlighet, säkerhet och miljö. När man vill studera förändringar på grund av ITS-åtgärder på vägsträckor med tätt belägna sensorer finns goda möjligheter till före- och eftermätningar. I dagsläget saknas ofta sådana studier och det finns därmed begränsat med kunskap om hur sådana före-efterstudier bäst ska genomföras. Syftet med denna rapport är att applicera den metodik som har tagits fram i projektet och utvärdera effekter på framkomlighet, trafiksäkerhet och miljö för en fallstudie vid Södertälje. På sträckan har en ny styrstrategi för val av variabla hastighetsgränser implementerats. På teststräckan har det funnits tätt belägna detektorer, installerade på 150–300 meters avstånd, i många år. Eftersom det redan innan ny styrstrategi fanns på plats gavs goda möjligheter att mäta trafikförhållandena på teststräckan, ges ett unikt tillfälle att jämföra trafikförhållanden före och efter styrstrategin är implementerad. Resultaten från utvärderingen bidrar, utöver att utvärdera tillämpbarheten av metodiken, till kunskap om hur före[1]efterstudier bör designas och variabla hastighetsgränsers inverkan på trafiksituationen då målet är att förbättra trafikförhållanden vid framkomlighetsproblem.
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| 10. |
- Grün, E., et al.
(author)
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Dust measurements in the Jovian magnetosphere
- 1997
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In: Geophysical Research Letters. - 1944-8007. ; 24:17, s. 2171-2174
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Journal article (peer-reviewed)abstract
- Dust measurements have been obtained with the dust detector onboard the Galileo spacecraft inside a distance of about 60RJ from Jupiter (Jupiter radius, RJ = 71,492 km) during two periods of about 8 days around Galileo's closest approaches to Ganymede on 27 June and on 6 Sept 1996. The impact rate of submicrometer-sized particles fluctuated by a factor of several hundred with a period of about 10 hours, implying that their trajectories are strongly affected by the interaction with the Jovian magnetic field. Concentrations of small dust impacts were detected at the times of Ganymede closest approaches that could be secondary ejecta particles generated upon impact of other particles onto Ganymede's surface. Micrometer-sized dust particles, which could be on bound orbits about Jupiter, are concentrated in the inner Jovian system inside about 20RJ from Jupiter.
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