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  • 1. Abramowski, A.
    et al.
    Aharonian, F.
    Benkhali, F. Ait
    Akhperjanian, A. G.
    Anguener, E. O.
    Backes, M.
    Balzer, A.
    Becherini, Y.
    Tjus, J. Becker
    Berge, D.
    Bernhard, S.
    Bernloehr, K.
    Birsin, E.
    Blackwell, R.
    Boettcher, M.
    Boisson, C.
    Bolmont, J.
    Bordas, P.
    Bregeon, J.
    Brun, F.
    Brun, P.
    Bryan, M.
    Bulik, T.
    Carr, J.
    Casanova, S.
    Chakraborty, N.
    Chalme-Calvet, R.
    Chaves, R. C. G.
    Chen, A.
    Chretien, M.
    Colafrancesco, S.
    Cologna, G.
    Conrad, Jan
    Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
    Couturier, C.
    Cui, Y.
    Davids, I. D.
    Degrange, B.
    Deil, C.
    deWilt, P.
    Djannati-Ata, A.
    Domainko, W.
    Donath, A.
    Drury, L. O'C.
    Dubus, G.
    Dutson, K.
    Dyks, J.
    Dyrda, M.
    Edwards, T.
    Egberts, K.
    Eger, P.
    Ernenwein, J-P.
    Espigat, P.
    Farnier, Christian
    Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
    Fegan, S.
    Feinstein, F.
    Fernandes, M. V.
    Fernandez, D.
    Fiasson, A.
    Fontaine, G.
    Foerster, A.
    Fuessling, M.
    Gabici, S.
    Gajdus, M.
    Gallant, Y. A.
    Garrigoux, T.
    Giavitto, G.
    Giebels, B.
    Glicenstein, J. F.
    Gottschall, D.
    Goyal, A.
    Grondin, M-H.
    Grudzinska, M.
    Hadasch, D.
    Haeffner, S.
    Hahn, J.
    Hawkes, J.
    Heinzelmann, G.
    Henri, G.
    Hermann, G.
    Hervet, O.
    Hillert, A.
    Hinton, J. A.
    Hofmann, W.
    Hofverberg, P.
    Hoischen, C.
    Holler, M.
    Horns, D.
    Ivascenko, A.
    Jacholkowska, A.
    Jamrozy, M.
    Janiak, M.
    Jankowsky, F.
    Jung-Richardt, I.
    Kastendieck, M. A.
    Katarzynski, K.
    Katz, U.
    Kerszberg, D.
    Khelifi, B.
    Kieffer, M.
    Klepser, S.
    Klochkov, D.
    Kluzniak, W.
    Kolitzus, D.
    Komin, Nu.
    Kosack, K.
    Krakau, S.
    Krayzel, F.
    Krueger, P. P.
    Laffon, H.
    Lamanna, G.
    Lau, J.
    Lefaucheur, J.
    Lefranc, V.
    Lemiere, A.
    Lemoine-Goumard, M.
    Lenain, J-P.
    Lohse, T.
    Lopatin, A.
    Lu, C-C.
    Lui, R.
    Marandon, V.
    Marcowith, A.
    Mariaud, C.
    Marx, R.
    Maurin, G.
    Maxted, N.
    Mayer, M.
    Meintjes, P. J.
    Menzler, U.
    Meyer, Manuel
    Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
    Mitchell, A. M. W.
    Moderski, R.
    Mohamed, M.
    Morå, Knut
    Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
    Moulin, E.
    Murach, T.
    de Naurois, M.
    Niemiec, J.
    Oakes, L.
    Odaka, H.
    Oettl, S.
    Ohm, S.
    Opitz, B.
    Ostrowski, M.
    Oya, I.
    Panter, M.
    Parsons, R. D.
    Arribas, M. Paz
    Pekeur, N. W.
    Pelletier, G.
    Petrucci, P-O.
    Peyaud, B.
    Pita, S.
    Poon, H.
    Prokoph, H.
    Puehlhofer, G.
    Punch, M.
    Quirrenbach, A.
    Raab, S.
    Reichardt, I.
    Reimer, A.
    Reimer, O.
    Renaud, M.
    de los Reyes, R.
    Rieger, F.
    Romoli, C.
    Rosier-Lees, S.
    Rowell, G.
    Rudak, B.
    Rulten, C. B.
    Sahakian, V.
    Salek, D.
    Sanchez, D. A.
    Santangelo, A.
    Sasaki, M.
    Schlickeiser, R.
    Schuessler, F.
    Schulz, A.
    Schwanke, U.
    Schwemmer, S.
    Seyffert, A. S.
    Simoni, R.
    Sol, H.
    Spanier, F.
    Spengler, Gerrit
    Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
    Spies, F.
    Stawarz, L.
    Steenkamp, R.
    Stegmann, C.
    Stinzing, F.
    Stycz, K.
    Sushch, I.
    Tavernet, J-P.
    Tavernier, T.
    Taylor, A. M.
    Terrier, R.
    Tluczykont, M.
    Trichard, C.
    Tuffs, R.
    Valerius, K.
    van der Walt, J.
    van Eldik, C.
    van Soelen, B.
    Vasileiadis, G.
    Veh, J.
    Venter, C.
    Viana, A.
    Vincent, P.
    Vink, J.
    Voisin, F.
    Voelk, H. J.
    Vuillaume, T.
    Wagner, S. J.
    Wagner, P.
    Wagner, Roger M.
    Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
    Weidinger, M.
    Weitzel, Q.
    White, R.
    Wierzcholska, A.
    Willmann, P.
    Woernlein, A.
    Wouters, D.
    Yang, R.
    Zabalza, V.
    Zaborov, D.
    Zacharias, M.
    Zdziarski, A. A.
    Zech, A.
    Zefi, F.
    Zywucka, N.
    Acceleration of petaelectronvolt protons in the Galactic Centre2016Ingår i: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 531, nr 7595, s. 476-+Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Galactic cosmic rays reach energies of at least a few petaelectronvolts(1) (of the order of 1015 electronvolts). This implies that our Galaxy contains petaelectronvolt accelerators ('PeVatrons'), but all proposed models of Galactic cosmic-ray accelerators encounter difficulties at exactly these energies(2). Dozens of Galactic accelerators capable of accelerating particles to energies of tens of teraelectronvolts (of the order of 10(13) electronvolts) were inferred from recent gamma-ray observations(3). However, none of the currently known accelerators-not even the handful of shell-type supernova remnants commonly believed to supply most Galactic cosmic rays-has shown the characteristic tracers of petaelectronvolt particles, namely, power-law spectra of.-rays extending without a cut-off or a spectral break to tens of teraelectronvolts(4). Here we report deep.-ray observations with arcminute angular resolution of the region surrounding the Galactic Centre, which show the expected tracer of the presence of petaelectronvolt protons within the central 10 parsecs of the Galaxy. We propose that the supermassive black hole Sagittarius A* is linked to this PeVatron. Sagittarius A* went through active phases in the past, as demonstrated by X-ray outbursts(5) and an outflow from the Galactic Centre(6). Although its current rate of particle acceleration is not sufficient to provide a substantial contribution to Galactic cosmic rays, Sagittarius A* could have plausibly been more active over the last 10(6)-10(7) years, and therefore should be considered as a viable alternative to supernova remnants as a source of petaelectronvolt Galactic cosmic rays.

  • 2.
    Abramsson, Mia
    et al.
    Swedish Energy Agency, Sweden.
    Jidesjö, Anders
    Swedish Energy Agency, Sweden.
    Research and development projects aiming to increase young adults’ knowledge of energy and energy efficiency2015Ingår i: eceee Summer Study proceedings / [ed] Therese Laitinen Lindström, Borg & Co, Stockholm, Sweden, European Council for an Energy Efficient Economy (ECEEE), 2015, s. 509-514Konferensbidrag (Refereegranskat)
    Abstract [en]

    Children and young adults are important target groups in order to decrease the climate change effects and increase an energy-efficient end use. With increased knowledge and awareness these target groups could play a constructive role in the current and future transition of the energy system. The correlation between knowledge, awareness and behavioral change is central for improved energy efficiency in the society. Children and young adults and their interest in the natural and technical science are central to ensure the long-term capability needed to transform the energy system.

    To support this development the Swedish Energy Agency started with young adults as a target group in research and development projects in 2008. Since then approximately 5 million EUR has been allocated for projects aiming to increase knowledge in these areas among young adults by developing practical methods and tools, educational material or in-service training for teachers. Around thirty projects have been supported and three of them, KNUT school development project, KNUT evaluation research project and The Energy Fall, will be discussed in this paper.


    The KNUT school development project is a national school project aiming at increasing students’ knowledge and interest in energy and energy efficiency. KNUT also stimulates learning and career choices related to energy, climate and resources and therefor strengthen Sweden's capacities and competitiveness future in these areas. To ensure the scientific base a research group from Linköping University (KNUT evaluation research project) has followed the project’s activities. Best practices of methods and tools have been tested and disseminated within the project at both regional and national level.


    The KNUT evaluation research project has identified and analyzed five success factors regarding energy, climate change and energy efficiency of importance for education: 

    • The relationships between the national, regional and local level

    • The function of education vary in time due to the development of society

    • Get to know the education content inside and outside of school

    • Successful meetings between different actors

    • The educational systems capacity to educate all and at the same time recruit some for specialization

    This paper will present an overview of the Swedish Energy Agency’s work on research and development projects aiming to increase young adults’ knowledge of energy and energy efficiency and the KNUT evaluation research project results, analysis and success factors.

  • 3.
    Ahammad, Shamim
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik.
    Importance of Training in Hotel industry2013Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The highly competitive environment in which businesses operate today requires a skilful workforce in every organisation in order to remain a successful player in the competitive game of the industry. One of the main problems which occur in the workplace is the lack of training. A large number of employees can appear dissatisfied (Heinemann and Greenberger, 2002) due to being assigned responsibilities without-having the right knowledge and skills in that area. Training is an essential process which should be cautiously designed and implemented within all firms. The overall aim of this dissertation is to assess the importance of training- in work field.For many years now human capital has been regarded as vital for the efficient functioning of an organisation because of its contribution in improving productivity, business performance and economic growth (Schultz, 1961). Therefore it is important to invest in human resources through training (Lucas, 1988) in order to improve the competitive position of the firm, and because of the enhanced quality, innovation, continual increased productivity and in turn improved profitability that can be achieved through this (Taylor and Davies, 2004).Throughout this research the training system in Hilton Hotel will be examined and appropriate recommendations for a more effective training system will be given where appropriate. The overall aim of this study is to assess the importance of training in hospitality industry.

  • 4.
    Ahlström, Elin
    Institutionen för Energi och Teknik, Sveriges lantbruksuniversitet.
    Beräkning av miljömässiga och ekonomiska konsekvenser vid källsortering av blandat byggavfall: samt analys av redovisningsmetoder för byggavfallsstatistik2015Självständigt arbete på avancerad nivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    I en värld där människan är det enda djur som lämnar efter sig avfall som inte kan brytas ned naturligt, är det viktigt att avfallet vi producerar tas om hand på bästa möjliga sätt. EU har därför tagit fram en prioriteringsordning för hur avfallet ska behandlas. Denna kallas avfallshierarkin och ska ligga till grund för medlemsländernas lagstiftning om avfallshantering. I Sverige kallas byggsektorn för den ”40-procentiga sektorn” vilket syftar på att 40 procent av Sveriges avfall genereras av denna sektor. Till år 2020 har EU som målsättning att 70 viktprocent av allt bygg- och rivningsavfall ska återvinnas eller återanvändas. För att presentera säkra siffror som visar ländernas utveckling mot EU:s mål måste avfallsstatistik tas fram på ett bättre sätt än vad som görs i dagsläget.

    Detta examensarbete syftade till att beräkna de miljömässiga och ekonomiska konsekvenserna vid källsortering av blandat byggavfall samt analysera vilken av de tillgängliga metoderna för framtagning av byggavfallsstatistik som är lämpligast.

    En screening av innehållet i det blandade avfallet vid ett renoveringsprojekt hos Telge Bostäder tillsammans med uppgifter om genererad avfallsmängd i ett tidigare genomfört renoveringsprojekt användes för att göra beräkningarna. Den befintliga hanteringen, där avfallet sorterades som blandat avfall, jämfördes sedan med ett hypotetiskt scenario där det vid screeningen identifierade innehållet (plast, trä och wellpapp) istället sorterades ut i separata fraktioner. Beräkningarna gjordes dels i ett av program (WAMPS) framtaget av Svenska miljöinstitutet (IVL) för beräkning av utsläpp från hantering av hushållsavfall och dels med egna beräkningar över koldioxidutsläpp. Kostnaden för att sortera ut avfallet bestämdes genom att använda Sorteras sortiment och prislista.

    Resultatet från WAMPS var att utsläpp av 62 ton koldioxid kunde undvikas från avfallshanteringen genom att sortera ut innehållet i drygt 70 ton blandat byggavfall i separata fraktioner på byggarbetsplatsen. Motsvarande siffra vid egna beräkningar blev 95 ton. Container- och behandlingskostnaden för det sorterade avfallet var lägre än för det osorterade avfallet vilket medförde att den totala avfallskostnaden för drygt 70 ton blandat avfall hade kunnat sänkas med 63 000 kronor om avfallet hade källsorterats.

    Analysen av redovisningsmetoder pekade på att det på kort sikt lämpligaste sättet att ta fram byggavfallsstatistik på, är att använda miljörapporter från avfallsbehandlingsföretagen som underlag för avfallsstatistik. Denna metod kräver ingen lagändring för att genomföras och utnyttjar ett redan befintligt rapporteringssystem.

  • 5.
    Ahmad, Arslan
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Hållbar utveckling, miljövetenskap och teknik. Brabant Water NV, 5200 BC 's-Hertogenbosch, The Netherlands.
    Evaluation and optimization of advanced oxidation coagulation filtration (AOCF) to produce drinking water with less than 1 μg/L of arsenic2014Rapport (Övrigt vetenskapligt)
    Abstract [en]

    Arsenic is an extremely poisonous element. It has been reported to cause contamination of drinking water sources in many parts of the world. The current drinking water permissible limit for arsenic in the European Union is 10 μg/L. The World Health Organization has a general rule that no substance may have a higher lifetime risk of more than 1 in 100,000. However, several studies on toxicity of arsenic suggest that purely based on health effects the arsenic limit of 10 μg/L is not sufficient. The main goal of this research was to develop an efficient arsenic removal technology that could be able to produce drinking water with an arsenic concentration of less than 1 μg/L. For this purpose, an innovative three step technique, Advanced Oxidation - Coagulation - Filtration (AOCF), was investigated through bench-scale and pilot scale experiments in the Netherlands at the water treatment plant of Dorst. Firstly, prior to the investigations on AOCF, the existing arsenic removal at the water treatment plant was investigated. Secondly, through a series of bench-scale experiments, the optimum type of coagulant, its combination dose with the selected chemical oxidant and optimum process pH were determined. Eventually, the partially optimized technique from the bench-scale was implemented at the pilot scale physical model of water treatment plant Dorst where AOCF was evaluated for arsenic removal and its effect on the removal of other common undesirable groundwater constituents. The optimized AOCF technology consistently removed arsenic from groundwater to below 1 ug/L when implemented at pilot scale. The overall effluent quality also remained acceptable. The method is efficient with both types of filtration media tested in this research i.e., virgin sand and metal oxide coated sand, however virgin sand media showed slightly better arsenic removal efficiency.

  • 6.
    Aid, Graham
    et al.
    KTH, Skolan för industriell teknik och management (ITM), Industriell ekologi.
    Brandt, Nils
    KTH, Skolan för industriell teknik och management (ITM), Industriell ekologi.
    Action Research In Waste Management: Application to construction and demolition waste in the Stockholm region2010Ingår i: Linnaeus ECO-TECH ´10 / [ed] Fabio Kaczala, Linnaeus University , 2010, s. 1009-1019Konferensbidrag (Refereegranskat)
    Abstract [en]

    The action research methodology and several of its methods have previously been highlighted and described by the authors as a fitting and rigorous framework approach for complex waste management systems.  This was in response to criticism of the ex ante selection of traditional empiric systems analysis tools to provide decision support and ‘sustainable improvement’ in such complex systems which often involve strong human and political factors.   Several of the action research methods described have recently been utilized in a case study around mineral (aggregate) construction and demolition waste in the Stockholm region.  These methods were integrated through a series of workshops and work areas undergone together with project members from several private and public sectors.  Leaving the problem fuzzy (loosely defined) in the beginning; utilizing convergent interviewing, rich pictures and focus groups allowed the researchers and partner stakeholders to identify not one but several problem areas within the system of focus.  Indicator creation and a dialectic processes were then used to identify qualitative and quantitative aspects of salience around these problem areas.  These resulting indicators were strengthened through a process of verification.  Each indicator was then analyzed by what was deemed to be appropriate and transparent means.  It is argued that this approach may create better communication, transparency, and understanding by the stakeholders.  These factors in turn allowing stronger stakeholder ownership of the process and assisting in more informed decisions and help to provide stability for desired change. However the process was not without its drawbacks such as intense communication and time requirements.

  • 7.
    Aili, Hans
    et al.
    Stockholms universitet, Humanistiska fakulteten, Romanska och klassiska institutionen.
    Pietsch, Theodore W
    University of Washington, Seattle.
    Jacob Theodor Klein's Critique of Peter Artedi's Ichthyologia (1738)2014Ingår i: Svenska Linnésällskapets årsskrift, ISSN 0375-2038, s. 39-84Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    An anonymous critique of Peter Artedi’s (1705‒1735) Ichthyologia sive opera omnia de piscibus, the latter edited and published posthumously by Carolus Linnaeus (1707‒ 1778) in 1738, is shown to have been written by the Prussian jurist and naturalist Jacob Theodor Klein (1685‒1759), and sent to Hans Sloane (1660−1753) in London for his approval. The critique is transcribed and translated, and its contents assessed in light of Artedi’s contribution to Linnaean systematics. While in some ways highly critical of Artedi, Klein must have been well aware that by criticizing Artedi he was, by association, criticizing Linnaeus as well. Linnaeus’s editorial contributions to the Ichthyologia as well as his on-going antagonistic relationship with Klein are also discussed.

  • 8.
    Aldabaldetreku, Rita
    et al.
    Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för strategisk hållbar utveckling.
    Lautiainen, Juuso
    Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för strategisk hållbar utveckling.
    Minkova, Alina
    Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för strategisk hållbar utveckling.
    The Role of Knowledge Management in Strategic Sustainable Development: Comparing Theory and Practice in Companies Applying the FSSD2016Självständigt arbete på avancerad nivå (magisterexamen), 20hpStudentuppsats (Examensarbete)
    Abstract [en]

    The purpose of this study is to explore the role of knowledge management (KM) in integrating sustainability into business strategy in companies applying the framework for strategic sustainable development (FSSD).Corporations have the potential to be key players in moving society towards sustainability, but they lack clear definitions and guidelines around strategic sustainable development (SSD). The authors focus on the benefits of KM in organisations applying the FSSD, which offers general strategic guidelines, but does not refer to the complexity of managing the new sustainability knowledge.This study first examines the scientific literature around KM and FSSD and compares it with the results of expert interviews to develop a State of the Art Model of KM for SSD. Then the model is compared to current practices of corporations applying the FSSD and the gap is examined.The results of the analysis show that the concept of KM is widely discussed in the literature, yet it does not have much presence in the business world. The value of knowledge is recognised, but KM is not much used and no structured practices were identified. It was concluded that companies would benefit from a strategic KM system when integrating sustainability.

  • 9.
    Ali, Babar
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Study of the performance of the Level-1 track trigger in the H→ττ→ee channel in ATLAS at high luminosity LHC2013Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
  • 10.
    Allenby, Patrick
    Karlstads universitet, Fakulteten för humaniora och samhällsvetenskap (from 2013), Institutionen för geografi, medier och kommunikation.
    Enkelstations-RTK eller Nätverks-RTK: I Naturvårdsuppdrag2014Självständigt arbete på grundnivå (högskoleexamen), 5 poäng / 7,5 hpStudentuppsats (Examensarbete)
    Abstract [sv]





    I examensarbetet har det ingått ett verkligt ärende som handläggs av mig som MBK-ingenjör inom Lantmäteriet. Det är ett naturvårdsuppdrag från Länsstyrelsen och innefattar bl a inmätning och utstakning av gräns på ett blivande naturreservat.


    Naturvårdsuppdraget Huskeberget ligger ca 5 km norr om Södra Finnskoga och sydväst om Höljes i norra Värmland. Omkrets 2,38 km. Områdets höjd är ca 550 m över havet och ligger på sydöstra sluttningen av Huskeberget.




    Lantmäteriet använder idag Leica Viva CS15/GS15 mätutrustning vid inmätning av brytpunkter och gränser. I detta fall det blivande naturreservatet. Under vissa omständigheter kan det ta tid att få fix-lösning eller helt utebli. Dessa omständigheter kan bero på ett flertal faktorer bl a kraftiga jonosfärsstörningar och/eller GPRS-nätets täckningsområde för mottagning av SWEPOS nätverks-RTK tjänst.




    Fokus har lagts på att utvärdera ett alternativ till nätverks-RTK, en sk enkelstations-RTK med uppkoppling till en tillfällig referensstation.


    Närmare undersökning har gjorts på tiden för initialisering vid varje enskild inmätning som sedan jämförts i de två mätmetoderna. Tiden för själva arbetet sätts sedan i relation till resultatet från undersökningen för att ge en helhetsbild av tidsåtgång i arbetet med vardera mätmetoden.




    Efter alla brytpunkter mätts in visade det sig att i just det här området inte fanns några anmärkningsvärda problem att få fix-lösning med någon av de valda mätmetoderna. Resultatet visar därmed små skillnader i tidsjämförelser.


    En oplanerad testmätning med nätverks-RTK gjordes i tät skog alldeles intill en inmätt brytpunkt utan framgång att få fix-lösning. Detta för att belysa problematiken med att få fix-lösning vid mätning i tät skog.


    Rapporten innehåller en kortfattad beskrivning av delar av arbetet i Lantmäteriets handläggning av naturvårdsuppdrag.

  • 11.
    Almlöf Ambjörnsson, Heléne
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörs- och kemivetenskaper.
    Östberg, Linda
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörs- och kemivetenskaper.
    Schenzel, Karla
    Martin Luther University Halle-Wittenberg, Department of Natural Scinence III, Institute of Agriculture and Nutritional Science.
    Larsson, Per Tomas
    Innventia AB, Fibre and Material Science Business area Biorefining, Stockholm.
    Germgård, Ulf
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörs- och kemivetenskaper.
    Enzyme pretreatment of dissolving pulp as a way to improve the following dissolution in NaOH/ZnO2014Ingår i: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 68, nr 4, s. 385-391Artikel i tidskrift (Refereegranskat)
  • 12.
    Alriksson, Anna
    Gymnastik- och idrottshögskolan, GIH, Institutionen för idrotts- och hälsovetenskap.
    Könsbunden gymkultur?: en kvantitativ studie om hur kvinnor och män väljer att träna på gym.2016Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Syfte och frågeställningar: Syftet med uppsatsen var att undersöka vad och hur vuxna tränade på gym för att se om det fanns några skillnader som gick att relatera till kön. De frågeställningar som användes för att besvara syftet var: Vilken form av träning föredrog vuxna att ägna sig åt på gymmet? I vilken utsträckning styrketränade vuxna i gymmets öppna lokaler? Vilka muskelgrupper och redskap premierades i samband med vuxnas styrketräning? Hur mycket tid lade vuxna på träning? Föredrog vuxna att träna på egen hand eller tillsammans med andra? Samtliga frågeställningar analyserades utifrån om det skiljde sig mellan kvinnor och män.

    Metod: För att besvara studiens frågeställningar som grundade sig i ett allmängiltigt intresse genomfördes en kvantitativ undersökning via ett strukturerat frågeformulär. Det egenkomponerade formuläret baserades på tidigare forskning och innehöll övervägande slutna svarsalternativ. Urvalet resulterade i ett stickprov av totalt 140 deltagare; 86 kvinnor (61,4%) och 54 män (38,6%). Undersökningen genomfördes på en stor träningsanläggning med ett varierande utbud och undertecknad befann sig på platsen under insamlingen av data.

    Resultat: Det fanns könsrelaterade skillnader i hur vuxna tränade på gymmet. Männen tenderade att träna mer och de föredrog individuell styrketräning med fria vikter och maskiner. Kvinnorna deltog oftare i ledarledd gruppaktivitet och/eller använde sig av sin egen kroppsvikt eller övriga redskap så som bollar och gummiband i samband med sin styrketräning. Utöver det lade männen större fokus på att utveckla sin överkropp medan kvinnorna tenderade att prioritera sin underkropp.

    Slutsats: Kvinnor och män tränade olika på gym och med tidigare forskning som stöd kan detta, till viss del, antas bero på yttre faktorer så som normer och kroppsideal. Denna vetskap bidrar till möjligheter att skapa ett gynnande bemötande från träningsbranschens sida som kan neutralisera den, till synes, styrda uppfattningen om träning. Genom att anpassa miljön och bemöta individen på ett sätt som främjar ett könsneutralt beteende i samband med träning ökar chanserna till en hållbar och optimal utveckling på både det fysiska och mentala planet, oavsett om du är kvinna eller man.

  • 13.
    Amange, Basil
    Karlstads universitet.
    Elevernas uppfattning om teknikämnets användbarhet: Exempel på högstadieelevers syn på teknikämnets relevans för deras vardagsliv2016Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]


    Syftet med det här examensarbetet är att undersöka hur högstadieelever uppfattar teknikämnets användbarhet. Utgångspunkten är vad Skolinspektionen (2014) påpekade i sin granskning av ämnet teknik när det gäller att erbjuda teknikundervisning som grundskoleelever upplever som relevant. Fokusområden har varit elevernas syn på teknikämnets relevans för deras vardagsliv. Metoden för studien är en kvalitativ undersökning som bygger på semistrukturerade intervjuer med totalt åtta elever, varav 4 elever från årskurs 8 och 4 elever från årskurs 9. De här eleverna kommer från två skolor som ligger i en förort i Göteborg. Mina teoretiska utgångspunkter är vissa relevanta forskningsstudier och även två lärandeteorier; det sociokulturella perspektivet och pragmatismen.

    Resultatet från studien visar en variation i en liten skala mellan flickors och pojkars värdering av teknikämnets användbarhet. Undersökningen visar att alla intervjuade elever vill se samband mellan teknikundervisning i skolan och livet utanför. Med andra ord kan man säga att det är meningsfullt för eleverna att förstå i vilket sammanhang teknikuppgiften kan vara aktuell och fruktbar i relation till människa och samhälle.

  • 14. Anderson, Bruce T.
    et al.
    Hassanzadeh, Pedram
    Caballero, Rodrigo
    Stockholms universitet, Naturvetenskapliga fakulteten, Meteorologiska institutionen (MISU).
    Persistent anomalies of the extratropical Northern Hemisphere wintertime circulation as an initiator of El Nino/Southern Oscillation events2017Ingår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, artikel-id 10145Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Climates across both hemispheres are strongly influenced by tropical Pacific variability associated with the El Nino/Southern Oscillation (ENSO). Conversely, extratropical variability also can affect the tropics. In particular, seasonal-mean alterations of near-surface winds associated with the North Pacific Oscillation (NPO) serve as a significant extratropical forcing agent of ENSO. However, it is still unclear what dynamical processes give rise to year-to-year shifts in these long-lived NPO anomalies. Here we show that intraseasonal variability in boreal winter pressure patterns over the Central North Pacific (CNP) imparts a significant signature upon the seasonal-mean circulations characteristic of the NPO. Further we show that the seasonal-mean signature results in part from year-to-year variations in persistent, quasi-stationary low-pressure intrusions into the subtropics of the CNP, accompanied by the establishment of persistent, quasi-stationary high-pressure anomalies over high latitudes of the CNP. Overall, we find that the frequency of these persistent extratropical anomalies (PEAs) during a given winter serves as a key modulator of intraseasonal variability in extratropical North Pacific circulations and, through their influence on the seasonal-mean circulations in and around the southern lobe of the NPO, the state of the equatorial Pacific 9-12 months later.

  • 15.
    Andersson, Ing-Marie
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Arbetsvetenskap.
    Rosén, Gunnar
    Högskolan Dalarna, Akademin Industri och samhälle, Arbetsvetenskap.
    Fällstrand Larsson, Nina
    Högskolan Dalarna, Akademin Industri och samhälle, Arbetsvetenskap.
    A study visit to a vitual company2012Ingår i: NGL 2012  Next Generation Learning Conference: Conference proceedings, Falun: Högskolan Dalarna , 2012, s. 69-74Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    To integrate study visits to different workplaces in higher education implies important benefits for the course quality. The study visit gives the students a better understanding for the real situations they will meet in working life. However for practical and economical reasons is that not always possible. The purpose of this project is to create a virtual company that shall replace the real one for study visits. The goal is to create a realistic picture and that intended use of it can come as close as possible to a real study visit. It is also important to facilitate linking theory and practice. The virtual company is built up by pictures, videos and text. All material is made available on a web page and when entering the students will meet a layout of the company. From that position is it possible to walk around and look at videos from different workstations. Besides that can they also listen to interviews with managers and representatives of staff as well as reading reports concerning productivity and the work environment. The focus of the study visit is work sciences, therefore the material also include some visualized information about work hazards. On the web page there are also a number of tasks for the students to carry out. Until the autumn 2011, 132 students at Dalarna University have visited and produced reports from the virtual company. They were studying in programs for mechanical engineering, production technicians and human resource management. An evaluation among some ten students showed that the study visit to the virtual company is flexible in time and effective, but that students wish to have even more detailed information about the company. Experiences from four years of use in a number of classes show that the concept is worth further development. Furthermore with production of new material the concept is likely to be applicable for other purposes.

  • 16.
    Andersson, Jan O
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för cell- och molekylärbiologi, Molekylär evolution.
    Evolution of Patchily Distributed Proteins Shared between Eukaryotes and Prokaryotes: Dictyostelium as a Case Study2011Ingår i: Journal of Molecular Biology and Biotechnology, ISSN 1464-1801, E-ISSN 1660-2412, Vol. 20, nr 2, s. 83-95Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Protein families are often patchily distributed in the tree of life; they are present in distantly related organisms, but absent in more closely related lineages. This could either be the result of lateral gene transfer between ancestors of organisms that encode them, or losses in the lineages that lack them. Here a novel approach is developed to study the evolution of patchily distributed proteins shared between prokaryotes and eukaryotes. Proteins encoded in the genome of cellular slime mold Dictyostelium discoideum and a restricted number of other lineages, including at least one prokaryote, were identified. Analyses of the phylogenetic distribution of 49 such patchily distributed protein families showed conflicts with organismal phylogenies; 25 are shared with the distantly related amoeboflagellate Naegleria (Excavata), whereas only two are present in the more closely related Entamoeba. Most protein families show unexpected topologies in phylogenetic analyses; eukaryotes are polyphyletic in 85% of the trees. These observations suggest that gene transfers have been an important mechanism for the distribution of patchily distributed proteins across all domains of life. Further studies of this exchangeable gene fraction are needed for a better understanding of the origin and evolution of eukaryotic genes and the diversification process of eukaryotes.

  • 17.
    Andersson, Kristofer
    Högskolan Kristianstad, Sektionen för lärande och miljö.
    Svedjebrukets slutskede: En studie av svedjebruket och landskapet i Algustorp, Röke socken, norra Skåne, ca 1800-19002017Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Relativt lite forskning har de senaste årtiondena bedrivits gällande svedjebruket, i synnerhet förekomsten och utbredningen av svedjeland inom enskilda byar. Arealen svedjad mark i förhållande till arealen åkermark i byn Algustorp, Röke socken, norra Skåne utgör grunden för denna studie. Gunhild Weimarck publicerade 1953 en avhandling där arealen svedjad mark jämförs med arealen åkermark i Lönsboda, Örkened socken, nordöstra Skåne. För denna uppsats är jämförelser mellan de två byarna fundamental, det vill säga en komparativ studie där likheter och skillnader diskuteras utifrån olika parametrar. Uppsatsen ska dessutom ge ökad kännedom om svedjebrukets förekomst i fem närbelägna byar i anslutning till Algustorp, belysa svedjandets betydelse för agrarsamhället och framför allt redogöra för svedjelandens omfattning inom byn Algustorp. För att möjliggöra detta har källmaterial i form av frågelistsvar, jordeböcker och historiskt kartmaterial varit grundläggande för studien. Analyser av geografisk information i applikationen ArcMap har underlättat beräkningen av arealen svedjemark respektive åkermark i Algustorp. Resultatet visar att arealen svedjeland i Algustorp var mindre än byns åkerareal, till skillnad från Lönsboda, där svedjemarkens areal istället var större i förhållande till byns åkermark. Detta fenomen tycks bero på regionala skillnader, det vill säga olikartade markförhållanden i de olika byarna. Tillgången på odlingsbar mark framstår som mycket liten i Lönsboda. Därmed förekom större arealer svedjemark i Lönsboda till skillnad från Algustorp, där förutsättningarna för spannmålsodling till synes är mera gynnsamma. Det är med stor sannolikhet naturgivna förhållanden, främst jordartssammansättningen, som pådrivit ett större behov av att nyttja svedjebruk i Lönsboda.

  • 18.
    Andersson, Marcus
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för elektronik, matematik och naturvetenskap.
    Programmering i skolan: Vad är det enligt lärarna?2018Självständigt arbete på avancerad nivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Syftet med denna uppsats är främst att undersöka hur lärare definierar begreppet programmering och hur definitionen inverkar på undervisningen. Undersökningen har genomförts med hjälp av metoderna enkätundersökning och intervjuer. Olika uppfattningar förekom, inte minst bland respondenterna i enkätundersökningen, men de intervjuade lärarna definierade programmering främst som att styra någonting. Deras beskrivning av den genomförda undervisningen antyder att denna uppfattning inverkar på utformningen av undervisningen. Det relativt begränsade underlaget i undersökningen gör att resultaten är svåra att generalisera.

  • 19.
    Andersson, Ole
    et al.
    Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum.
    Bengtsson, Ingemar
    Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum.
    Ericsson, Marie
    Sjöqvist, Erik
    Geometric phases for mixed states of the Kitaev chain2016Ingår i: Philosophical Transactions. Series A: Mathematical, physical, and engineering science, ISSN 1364-503X, E-ISSN 1471-2962, Vol. 374, nr 2068, artikel-id 20150231Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The Berry phase has found applications in building topological order parameters for certain condensed matter systems. The question whether some geometric phase for mixed states can serve the same purpose has been raised, and proposals are on the table. We analyse the intricate behaviour of Uhlmann's geometric phase in the Kitaev chain at finite temperature, and then argue that it captures quite different physics from that intended. We also analyse the behaviour of a geometric phase introduced in the context of interferometry. For the Kitaev chain, this phase closely mirrors that of the Berry phase, and we argue that it merits further investigation.

  • 20.
    Andersson, Sara
    Stockholms universitet, Naturvetenskapliga fakulteten, Stockholm Resilience Centre.
    Mapping supply and demand of ecosystem services in the Helge Å catchment area, Sweden2016Självständigt arbete på avancerad nivå (masterexamen), 40 poäng / 60 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Research on ecosystem services has accelerated the last few years, but there is a knowledge gap on how to integrate the concept into management in a way that is mindful of the complex, dynamic and non-linear dimensions of ecosystem services. Ecosystem services are often approached from a supply side, and more often than not services are approached individually without attempt to capture the trade-offs and synergies between services. The overall aim of this master’s thesis is to contribute to the operationalization of the ecosystem services concept, within a social-ecological systems framework. This is done through a case study of the Helge Å catchment in Southern Sweden, in which I use publically available data to map the supply and demand of a selection of locally relevant provisioning, regulating, and, to some extent, cultural ecosystem services. The thesis analyses some of the challenges of, as well as opportunities for, making tangible sense of this complex social-ecological concept in a way that can inform decision making on ecosystem services for sustainable development. The results show that mapping both supply and demand adds important dimensions to ecosystem service assessment that has value within management contexts. Especially important are the added social dimensions of ecosystem service provision, and the incorporation of societal demand as a factor in mapping. There are some obvious challenges still associated with this type of mapping, foremost associated with mapping of cultural ecosystem services and data availability, which have yet to be resolved through continued research efforts.

  • 21.
    Andersson-Sköld, Yvonne
    et al.
    Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden; Department of Architecture and Civil Engineering, Chalmers University of Technology, Gothenburg, Sweden.
    Klingberg, Jenny
    Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden.
    Gunnarsson, Bengt
    Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden.
    Cullinane, Kevin
    School of Business Economics and Law, University of Gothenburg, Gothenburg, Sweden.
    Gustafsson, Ingela
    City of Gothenburg, Parks and Landscape Administration, Gothenburg, Sweden.
    Hedblom, Marcus
    Department of Forest Resource Management, Landscape Analysis, Swedish University of Agricultural Sciences, Uppsala, Sweden.
    Knez, Igor
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för socialt arbete och psykologi, Psykologi.
    Lindberg, Fredrik
    Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden.
    Ode Sang, Åsa
    Department of Landscape Architecture, Planning and Management, Swedish University of Agricultural Sciences, Alnarp, Sweden.
    Pleijel, Håkan
    Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden.
    Thorsson, Pontus
    Division of Applied Acoustics, Chalmers University of Technology, Gothenburg, Sweden.
    Thorsson, Sofia
    Urban Climate Group, Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden.
    A framework for assessing urban greenery's effects and valuing its ecosystem services2018Ingår i: Journal of Environmental Management, ISSN 0301-4797, E-ISSN 1095-8630, Vol. 205, s. 274-285, artikel-id S0301-4797(17)30940-4Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Ongoing urban exploitation is increasing pressure to transform urban green spaces, while there is increasing awareness that greenery provides a range of important benefits to city residents. In efforts to help resolve associated problems we have developed a framework for integrated assessments of ecosystem service (ES) benefits and values provided by urban greenery, based on the ecosystem service cascade model. The aim is to provide a method for assessing the contribution to, and valuing, multiple ES provided by urban greenery that can be readily applied in routine planning processes. The framework is unique as it recognizes that an urban greenery comprises several components and functions that can contribute to multiple ecosystem services in one or more ways via different functional traits (e.g. foliage characteristics) for which readily measured indicators have been identified. The framework consists of five steps including compilation of an inventory of indicator; application of effectivity factors to rate indicators' effectiveness; estimation of effects; estimation of benefits for each ES; estimation of the total ES value of the ecosystem. The framework was applied to assess ecosystem services provided by trees, shrubs, herbs, birds, and bees, in green areas spanning an urban gradient in Gothenburg, Sweden. Estimates of perceived values of ecosystem services were obtained from interviews with the public and workshop activities with civil servants. The framework is systematic and transparent at all stages and appears to have potential utility in the existing spatial planning processes.

  • 22.
    Anderssson, Kristina
    et al.
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Centrum för genusvetenskap.
    Hussenius, Anita
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Centrum för genusvetenskap.
    Gullberg, Annica
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Centrum för genusvetenskap. Högskolan i Gävle.
    Danielsson, Anna
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Fakulteten för utbildningsvetenskaper, Institutionen för pedagogik, didaktik och utbildningsstudier. Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Centrum för genusvetenskap.
    Scantlebury, Kathryn
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Centrum för genusvetenskap. University of Delaware.
    Chafing borderlands: Obstacles for Science Teaching and Learning in Teacher Education2014Konferensbidrag (Refereegranskat)
    Abstract [en]

    A major Western concern is that young people avoid science and technology programs. At various times, and in different countries, governments, funding agencies and businesses have made large investments in recruitment campaigns with the objective to increase students’ interest and attract new groups of students to these disciplines. In particular, girls and women have been the target group for many of these campaigns. The assumption is that if young people understood how exciting and interesting science is, they would choose these subjects. In other words, the problem is that young people "don’t understand what is best for their own good".  In addition, research has shown that primary and pre-school student teachers often feel alienated by science education (Appleton & Kindt 2002) and that it may be difficult for these students to reconcile the role of teacher of young children with the role of science teacher in their identity formation (Danielsson & Warwick 2012).


    However, feminist science educators suggest that students’ lack of interest is caused by character and image of the disciplines (Brickhouse 2001; Scantlebury 2012). Feminist philosophers’ of science have challenged the view of natural sciences as objective, and argue that knowledge production is human activities that are socially and culturally situated (Haraway 1988; Harding 1986). A noted problem with science is its elitist image. Science is portrayed as difficult and demanding, and as requiring a special talent from those who study or engage with the discipline. A feminist pedagogical stance is to visualize and discuss cultural, social, and historical dimensions of science. This has also proved advantageous for the acquiring of science content knowledge (Sible et al 2006). Therefore, we argue, that one important aspect of science teacher education is to problematize science (education), e.g. by including feminist critiques of science (Capobianco 2007; Mayberry 1998).

    In this paper we explore the impact of a feminist teaching intervention within teacher education, focusing on the research question: What occurs when students are situated in the encounter between feminist critique of natural sciences and teacher education? What kind of obstacles can be identified and how will these effect pre-service teachers’ pedagogy of science?


    The intervention, data collection and analysis

    In an ongoing research and intervention project we are studying how an increased awareness of gender issues in science and in science teaching among student teachers influences their identities as teachers, and their teaching of science. We have followed a cohort of approximately 120 pre-service teachers (early years to lower secondary) from two universities in Sweden, through their first year of science courses. As an integral part of these science courses our intervention has introduced critical perspectives on gender and science as related to the culture of science and a feminist critique of the sciences. The project as a whole is framed theoretically by Hirdman's (1990) and Harding's (1986) theories of gender order in society, where gender is constituted on different levels: the structural, the symbolic and the individual (Harding 1986; Hirdman 1990; Rubin 1975). Hirdman (1990) describes this pattern from two perspectives: first, the separation of the two sexes and second, the superior status of the male standard. The formation of gender consolidates differences between the sexes and the female gender is always subordinate the male one, independent of status, class, time, and space.

  • 23.
    Anderssson, Kristina
    et al.
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Centrum för genusvetenskap.
    Hussenius, Anita
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Centrum för genusvetenskap.
    Scantlebury, Kathryn
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Centrum för genusvetenskap. University of Delaware.
    Gullberg, Annica
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Centrum för genusvetenskap.
    Danielsson, Anna
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Fakulteten för utbildningsvetenskaper, Institutionen för pedagogik, didaktik och utbildningsstudier.
    Critiquing science, thinking gender in science teacher education.2014Konferensbidrag (Refereegranskat)
  • 24. Arcavi, Iair
    et al.
    Howell, D. Andrew
    Kasen, Daniel
    Bildsten, Lars
    Hosseinzadeh, Griffin
    McCully, Curtis
    Wong, Zheng Chuen
    Katz, Sarah Rebekah
    Gal-Yam, Avishay
    Sollerman, Jesper
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för astronomi. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
    Taddia, Francesco
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för astronomi. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
    Leloudas, Giorgos
    Fremling, Christoffer
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för astronomi. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
    Nugent, Peter E.
    Horesh, Assaf
    Mooley, Kunal
    Rumsey, Clare
    Cenko, S. B. Radley
    Graham, Melissa L.
    Perley, Daniel A.
    Nakar, Ehud
    Shaviv, Nir J.
    Bromberg, Omer
    Shen, Ken J.
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för astronomi. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
    Ofek, Eran O.
    Cao, Yi
    Wang, Xiaofeng
    Huang, Fang
    Rui, Liming
    Zhang, Tianmeng
    Li, Wenxiong
    Li, Zhitong
    Zhang, Jujia
    Valenti, Stefano
    Guevel, David
    Shappee, Benjamin
    Kochanek, Christopher S.
    Holoien, Thomas W. -S.
    Filippenko, Alexei V.
    Fender, Rob
    Nyholm, Anders
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för astronomi. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
    Yaron, Ofer
    Kasliwal, Mansi M. .
    Sullivan, Mark
    Lagorodnova, Nadja B.
    Walters, Richard S.
    Lunnan, Ragnhild
    Khazov, Danny
    Andreoni, Igor
    Laher, Russ R.
    Konidaris, Nick
    Wozniak, Przemek
    Bue, Brian
    Energetic eruptions leading to a peculiar hydrogen-rich explosion of a massive star2017Ingår i: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 551, nr 7679, s. 210-213Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Every supernova so far observed has been considered to be the terminal explosion of a star. Moreover, all supernovae with absorption lines in their spectra show those lines decreasing in velocity over time, as the ejecta expand and thin, revealing slower-moving material that was previously hidden. In addition, every supernova that exhibits the absorption lines of hydrogen has one main light-curve peak, or a plateau in luminosity, lasting approximately 100 days before declining(1). Here we report observations of iPTF14hls, an event that has spectra identical to a hydrogen-rich core-collapse supernova, but characteristics that differ extensively from those of known supernovae. The light curve has at least five peaks and remains bright for more than 600 days; the absorption lines show little to no decrease in velocity; and the radius of the line-forming region is more than an order of magnitude bigger than the radius of the photosphere derived from the continuum emission. These characteristics are consistent with a shell of several tens of solar masses ejected by the progenitor star at supernova-level energies a few hundred days before a terminal explosion. Another possible eruption was recorded at the same position in 1954. Multiple energetic pre-supernova eruptions are expected to occur in stars of 95 to 130 solar masses, which experience the pulsational pair instability(2-5). That model, however, does not account for the continued presence of hydrogen, or the energetics observed here. Another mechanism for the violent ejection of mass in massive stars may be required.

  • 25.
    Arnkil, Harald
    et al.
    Aalto University School of Art and Design, Helsinki .
    Fridell Anter, Karin
    Klarén, Ulf
    Matusiak, Barbara
    Norwegian University of Science and Technology, Department of Architectural Design, Form and Colour Studies, Trondheim.
    PERCIFAL: Visual analysis of space, light and colour2011Ingår i: AIC 2011, Interaction of Colour & Light in the Arts and Sciences, Midterm Meeting of the International Colour Association, Zurich, Switzerland, 7–10 June 2011: Conference Proceedings, CD / [ed] Verena M. Schindler and Stephan Cuber, Zurich: pro/colore, 2011 , 2011, s. 229-232Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper addresses the need for better and more accurate methods of recording and analyzing the visual experience of architectural space. PERCIFAL (Perceptive Spatial Analysis of Colour and Light) is an ongoing project that aims at developing a method of analysis that can capture coherent spatial experiences of colour and light. The starting point for PERCIFAL is a method of visual evaluation of space and light, developed by Professor Anders Liljefors at the former department of architectural lighting at KTH Architecture. PERCIFAL is based on direct visual observations and the recording of these observations by verbal-semantic descriptions using a questionnaire. It has been developed primarily as an educational tool, but we see in it potential for a design tool for professionals as well as for an analytical method for research. The first test results, conducted in Sweden, Norway and Finland, show that the method has significant pedagogical merits and that it allows interesting comparisons between physical measurements and visual experiences of space, light and colour. 

  • 26. Artiglia, Luca
    et al.
    Edebeli, Jacinta
    Orlando, Fabrizio
    Chen, Shuzhen
    Lee, Ming-Tao
    Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Paul Scherrer Institut, Switzerland.
    Arroyo, Pablo Corral
    Gilgen, Anina
    Bartels-Rausch, Thorsten
    Kleibert, Armin
    Vazdar, Mario
    Carignano, Marcelo Andres
    Francisco, Joseph S.
    Shepson, Paul B.
    Gladich, Ivan
    Ammann, Markus
    A surface-stabilized ozonide triggers bromide oxidation at the aqueous solution-vapour interface2017Ingår i: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 8, artikel-id 700Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Oxidation of bromide in aqueous environments initiates the formation of molecular halogen compounds, which is important for the global tropospheric ozone budget. In the aqueous bulk, oxidation of bromide by ozone involves a [Br center dot OOO-] complex as intermediate. Here we report liquid jet X-ray photoelectron spectroscopy measurements that provide direct experimental evidence for the ozonide and establish its propensity for the solution-vapour interface. Theoretical calculations support these findings, showing that water stabilizes the ozonide and lowers the energy of the transition state at neutral pH. Kinetic experiments confirm the dominance of the heterogeneous oxidation route established by this precursor at low, atmospherically relevant ozone concentrations. Taken together, our results provide a strong case of different reaction kinetics and mechanisms of reactions occurring at the aqueous phase-vapour interface compared with the bulk aqueous phase.

  • 27.
    Arvidsson, Anna K
    Statens väg- och transportforskningsinstitut, Infrastruktur, INFRA, Drift och underhåll, DOU.
    Sträckprognoser E62013Rapport (Övrigt vetenskapligt)
    Abstract [sv]

    Sträckprognoser är ett arbetssätt för att prognostisera vädersituationer eller väglag, då framför allt halka. Projektet som redovisas i VTI notat 32-2013 är en början på att implementera sträckprognostekniken på svenska vägar. Sträckprognoser finns sedan tidigare implementerade på flera håll i världen däribland Norge och Tjeckien och är ett sätt att prognostisera vädersituationer eller väglag på sträckor mellan befintliga VViS-stationer (VägVäderinformationSystem). VViS-stationer är placerade över hela Sverige och framförallt på platser där sannolikheten för halka är stor. Om det sker förändringar i området runt stationen, till exempel ändringar av vegetationen, kan förhållandena ändras jämfört med den ursprungliga karteringen av vägsträckan. För att göra en modell som beskriver en vägsträcka behövs en klimatkartering och en topoklimatologisk analys för att veta hur temperaturer, höjder, skuggning, med mera, längs vägen varierar. Därefter kan vägen delas in i olika segment som representerar de olika variationerna på vägen. Modellen beräknar sedan fram prognoser för yttemperaturer och väglag, dessa jämförs och justeras tillsammans med de uppmätta temperaturerna från tidpunkten för karteringen. Resultaten av mätningarna på aktuell vägsträcka längs E6 visar på god samstämmighet mellan de modellerade värdena och de uppmätta temperaturerna.

  • 28.
    Arvidsson, Anna K
    Statens väg- och transportforskningsinstitut, Infrastruktur, INFRA, Drift och underhåll, DOU.
    Sustainability and climate change considerations in winter maintenance2015Konferensbidrag (Övrigt vetenskapligt)
  • 29.
    Arwidsson, Anna-Karin
    Linköpings universitet, Institutionen för tema, Tema vatten i natur och samhälle. Linköpings universitet, Filosofiska fakulteten.
    Digital kompetens, från osäkerhet till förtrogenhet: En studie av lärares kunskaper och svårigheter i arbetet med interaktiva skrivtavlor i grundskolans senare år2014Självständigt arbete på avancerad nivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Att integrera IKT-verktyg i skolans verksamhet, och då specifikt interaktiva skrivtavlor, har blivit en allt vanligare företeelse för att främja elevers digitala kompetens. En kommun som har gjort en storskalig satsning på att integrera dessa interaktiva skrivtavlor är Linköpings och i dagsläget är varje klassrum i samtliga av deras grundskolor utrustade med en. Denna studie syftar till att ge en inblick i hur den satsningen har påverkat undervisningen ur ett lärarperspektiv, och då specifikt lärare i de naturvetenskapligt orienterande ämnena.

    Genom semistrukturerade intervjuer ämnar studien att sammanställa de förhållningssätt och erfarenheter lärare ger uttryck för gentemot de interaktiva skrivtavlorna. Studien avser att ge en uppfattning om vad lärare anser som betydelsefulla faktorer då en skola genomgår en satsning på interaktiva skrivtavlor i utbildningssyfte. Fokus ligger på begreppen möjligheter, svårigheter samt kunskaper och andra faktorer.

    Resultaten av denna studie visar att lärarna upplever de interaktiva skrivtavlorna som ett verktyg med potential till att ge positiva effekter i undervisningen, och på flera sätt också har det. Att de interaktiva skrivtavlorna möjliggör projektorfunktion och internetuppkoppling på ett snabbt och smidigt sätt är en av de största fördelarna som lärarna i denna studie ger uttryck för. Däremot framkommer även svårigheter med verktyget, och flera av dem är sådana hinder att användningen på ett eller annat sätt begränsas. De hinder som tydligast framträder är tekniska svårigheter, både vad gäller support, mjuk- och hårdvara, fortbildning samt tid. Att lärarna i studien önskar stöttning i sitt arbete med att bekanta sig med verktyget och involvera det i undervisningen är tydligt.

    Utifrån lärarnas berättelser föreslår studien att ge ökade möjligheter till tid och fortbildning, utveckla den tekniska supporten och öka lärarnas möjligheter till kollegiala samtal för att minska dessa svårigheter och den känsla av oro som de skapar för att utöka användningen och verktygets effekter. Lokala strategier, och deras förankring i verksamheten, har också visats ha en mycket betydande roll i detta, då de kan verka stöttande och styrande i och med ett uttalat syfte, mål och tillvägagångssätt.

    Att skolornas användning av IKT-verktyg behöver stöttas har även påpekats utifrån av bland annat Skolverket, och det senaste förslaget är att Sverige utarbetar en nationell IT-strategi. Studiens resultat visar på att detta förslag har potential att ge goda effekter på undervisningen.

  • 30.
    Augustsson, Fredrik
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för elektronik, matematik och naturvetenskap.
    Idrottslärares inställning till gym i undervisningen2013Självständigt arbete på avancerad nivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
  • 31. Baeza-Delgado, Carlos
    et al.
    von Heijne, Gunnar
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för biokemi och biofysik. Stockholms universitet, Science for Life Laboratory (SciLifeLab).
    Marti-Renom, Marc A.
    Mingarro, Ismael
    Biological insertion of computationally designed short transmembrane segments2016Ingår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 6, artikel-id 23397Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The great majority of helical membrane proteins are inserted co-translationally into the ER membrane through a continuous ribosome-translocon channel. The efficiency of membrane insertion depends on transmembrane (TM) helix amino acid composition, the helix length and the position of the amino acids within the helix. In this work, we conducted a computational analysis of the composition and location of amino acids in transmembrane helices found in membrane proteins of known structure to obtain an extensive set of designed polypeptide segments with naturally occurring amino acid distributions. Then, using an in vitro translation system in the presence of biological membranes, we experimentally validated our predictions by analyzing its membrane integration capacity. Coupled with known strategies to control membrane protein topology, these findings may pave the way to de novo membrane protein design.

  • 32.
    Balk, Lennart
    et al.
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för miljövetenskap och analytisk kemi.
    Hägerroth, Per-Åke
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för miljövetenskap och analytisk kemi.
    Gustavsson, Hanna
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för miljövetenskap och analytisk kemi.
    Sigg, Lisa
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för miljövetenskap och analytisk kemi.
    Åkerman, Gun
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för miljövetenskap och analytisk kemi.
    Ruiz Munoz, Yolanda
    Honeyfield, Dale C.
    Tjärnlund, Ulla
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för miljövetenskap och analytisk kemi.
    Oliveira, Kenneth
    Ström, Karin
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för miljövetenskap och analytisk kemi.
    McCormick, Stephen D.
    Karlsson, Simon
    Ström, Marika
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för miljövetenskap och analytisk kemi. Karolinska Institutet, Sweden.
    van Manen, Mathijs
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för miljövetenskap och analytisk kemi. Utrecht University, Germany.
    Berg, Anna-Lena
    Halldorsson, Halldor P.
    Strömquist, Jennie
    Collier, Tracy K.
    Börjeson, Hans
    Mörner, Torsten
    Hansson, Tomas
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för miljövetenskap och analytisk kemi.
    Widespread episodic thiamine deficiency in Northern Hemisphere wildlife2016Ingår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 6, artikel-id 38821Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Many wildlife populations are declining at rates higher than can be explained by known threats to biodiversity. Recently, thiamine (vitamin B-1) deficiency has emerged as a possible contributing cause. Here, thiamine status was systematically investigated in three animal classes: bivalves, ray-finned fishes, and birds. Thiamine diphosphate is required as a cofactor in at least five life-sustaining enzymes that are required for basic cellular metabolism. Analysis of different phosphorylated forms of thiamine, as well as of activities and amount of holoenzyme and apoenzyme forms of thiaminedependent enzymes, revealed episodically occurring thiamine deficiency in all three animal classes. These biochemical effects were also linked to secondary effects on growth, condition, liver size, blood chemistry and composition, histopathology, swimming behaviour and endurance, parasite infestation, and reproduction. It is unlikely that the thiamine deficiency is caused by impaired phosphorylation within the cells. Rather, the results point towards insufficient amounts of thiamine in the food. By investigating a large geographic area, by extending the focus from lethal to sublethal thiamine deficiency, and by linking biochemical alterations to secondary effects, we demonstrate that the problem of thiamine deficiency is considerably more widespread and severe than previously reported.

  • 33.
    Balksten, Kristin
    Kalkputs: porstrukturens betydelse för beständighet2005Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    When restoring historic lime plaster it can be difficult to reach the required durability. Today newly made lime plaster can fall off due to frost damages after only a couple of winters. To understand and solve these problems, the subject has been studied from different perspectives. Several factors in the production step are making an influence on the durability of lime plaster: 1. A binder, suitable for the building, must be chosen along with sandthat gives good material properties in both fresh mortar and in plasters. 2. The lime/sand ratio and the mixing technique should be chosen from the properties in the lime and the sand, in order to get a mortar with good workability. 3. The craftsmanship should be adjusted to the mortar, the weather and the underlying materials. A plaster with good frost resistance has a certain pore structure. The plaster should have some round air pores that contain air even when the material is filled capillary with water. Such air pores give the water a free space to expand when it is freezing. If the air pores are missing, the ice crystals may damage the plaster when expanding. To increase the chance of making a frost resistant lime plaster, the lime/sand ration must be adjusted so the lime can fill up well in the sand. Otherwise a collapsed pore system can easily occur, which means an open pore system without distinct air pores. A collapsed pore system contains many pores well connected with each other. Such a system is easily damaged by frost. To increase the chance of success, it is of great importance to work the surface of the lime plaster at the right time and in the correct way. Before working on a surface the mortar must be aloud to stiffen. Only then a homogeneous material can be created; cracks due to shrinkage can be pressed together and the result is a more compact material with an open surface. The time necessary for mortars to stiffen is related to the water content of the mortar, the suction of the underlying surface and the weather conditions. If the surface is worked on while the mortar is still fresh, the binder can form a hard lime shell on the surface. Inside thematerial a lack of binder can appear. Such plasters have a very low frost resistance. Other durability problems related to plaster are damages in the underlying materials, i.e. rotten wood in covered constructions or leached lime in old joints. Such damages can occur if the covering mortar is made of strong hydraulic lime or cement, since they form plasters with a low permeability in comparison to lime. Due to mentioned findings, it is important to study how a pore structureis influenced by materials, mixture and craftsmanship. Only then it is possible to understand how damages can be decreased.

  • 34.
    Balksten, Kristin
    et al.
    Broström, Tor
    Högskolan på Gotland, Institutionen för kultur, energi och miljö.
    Permeability in lime plaster in relation to durability of covered materials2004Konferensbidrag (Refereegranskat)
    Abstract [en]

    In restoration of old buildings, lime plasters are used for reasons of authenticity and for technicalreasons as well. In many traditional constructions, there is wood behind the plasters or there is old limemortar in the masonry. For the durability of both these underlying materials, it is important that therelative humidity, RH is not too high under a long time of exposure. This can lead to an accelerateddegradation process of wood and leaching of lime in mortars. To prevent this, the plaster must have aproper permeability.The permeability of a material determines its ability to transport gas and moisture. In lime plasters,permeability affects hardening, carbonation as well as durability of the underlying materials. In thepresent paper, eleven mixtures of lime mortar were studied. The binders used were lime slaked in fourdifferent ways, hydraulic lime and cement.The following measurements were made to analyse the permeability and the pore structure of thesamples. Gas permeability and draining curves give an indication of rate of carbonation. Vapourpermeability shows the ability of plaster to transmit moisture at different RH. Thin sections were madefor microscopically investigations of the samples.The investigations show that both the vapour permeability and gas permeability decreases with anincreased amount of hydraulic binder in the lime plasters. Even small amounts of hydraulic binderhave a significant effect.By connecting these results with examples from reality, the picture becomes clearer. In the medievaltown Visby in Sweden, there are several examples of both rotten wood and disintegrated lime mortars.It is constructions from 13th to 19th centuries and low permeable cementitious plasters have coveredthem all, during the middle of the 20th century.

  • 35.
    Balksten, Kristin
    et al.
    Klasén, Kenth
    The influence of craftsmanship on the inner structures of lime plasters2005Konferensbidrag (Refereegranskat)
    Abstract [en]

    The use of traditional lime plaster in restoration of old buildings is motivated by bothtechnical and historic reasons. The plasterer deals daily with a multivariable problem wherethe variables are related in such a complex way that we are not even close to findingconverging solutions by traditional scientific methods. The decisions and actions of thecraftsman will have an influence on both the surface structure and the inner structure of thelime plaster. The present paper will focus on the time between application of mortar andworking on the surface to make a floated finish. In total, 32 lime plaster surfaces have beenanalysed. Half of them have been worked on after they have stiffened up and half of themhave been worked on while they are still fresh. The results clearly show that the time betweenapplication of mortar and working the surface is a critical parameter. If you wait until theright time, you receive a more homogeneous and compact material with an open surface anda higher frost resistance.

  • 36.
    Balksten, Kristin
    et al.
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Konstvetenskapliga institutionen.
    Lindholm, Martin
    Lange, Johanna
    Increased salt and frost damages in solid neo-Gothic brickwork masonry due to low permeable restoration materials of the 20th century2014Ingår i: 9th IMC, Book of Abstract / [ed] Paulo B. Lourenco, Barry A. Haseltine, Graca Vasconcelos, 2014Konferensbidrag (Refereegranskat)
    Abstract [en]

    In Gothenburg many stone buildings of brickwork were built during the neo-Romanesque and neo-Gothic period in the late 19th century. The masonry was solid with a wall of bricks often covered with facing bricks with a hard burned water repellent surface. At Örgryte new church the bricks were put in lime mortar but the surface of the joints was made with a thin cement mortar layer. Salt problems are known in this church since early 20th century and the subsequent need of maintenance have led to several extensive restorations with replacement of external facing bricks and internal lime plaster during the years. In each restoration more low permeable facing bricks and more low permeable cement mortars have been chosen, followed by new problems inside the wall as the water transport properties in the wall has changed. Whereas salts have caused problems mainly on the surface, the restoration materials have caused problems with frost and salt damages in bricks and lime mortars in the wall core behind them.

  • 37.
    Balksten, Kristin
    et al.
    Magnusson, Sophia
    The pore structure in lime plaster as a key to understanding moisture transportation properties and frost damages2004Ingår i: 10th International Congress on the Deterioration and Conservation of Stone, 2004Konferensbidrag (Refereegranskat)
    Abstract [en]

    The pore structure is of great importance for a materials ability to hold and transport gasand moisture. In lime plaster, it affects hardening, carbonation as well as durability againstfrost damage. In the present paper, eleven mixtures of lime mortar were studied withrespect to frost damages. The binders used were lime slaked in four different ways,hydraulic lime and cement.Several analyses were made to characterize the transport properties and the porestructure of the materials; density, porosity, sorption curves, capillary water suction andthin sections. This study shows that there is a correlation between pore structure andimportant material properties. By studying these parameters, it is possible to get a goodpicture of the materials ability to resist frost damages. The study also gives an indication ofwhat materials in the mortar such as binders, aggregates and water, give a good porestructure.

  • 38.
    Balksten, Kristin
    et al.
    Myrin, Malin
    Göteborgs Universitet.
    Lime-based Repair Mortars: Influence by Surface Working Methods onBehaviour and Durability of Mortar2006Konferensbidrag (Refereegranskat)
    Abstract [en]

    The main purpose of this study was to observe the influence by different surface working methodson behaviour, durability and appearance of lime-based stone-repair mortars.The findings are based on:

    - Observations made during restoration work

    - Observations from field stations

    - Microscopic analysis of thin sections of mortar

    - Parallel studies on lime plaster

    The results show clear differences in durability, appearance and behaviour of lime-based mortar dependingon at which stage of the drying process the mortar is worked on. For achieving durable mortar it is importantto avoid the development of a surface lime-film. The study implies that the mortar, only when worked on at aspecific stage of drying, will be durable and have a structure, texture and porosity compatible with the surroundingstone material.

  • 39.
    Balksten, Kristin
    et al.
    Department of Chemical and Biological Engineering, Environmental Inorganic Chemistry, Chalmers University of Technology.
    Steenari, Britt-Marie
    Department of Chemical and Biological Engineering, Environmental Inorganic Chemistry, Chalmers University of Technology.
    A method to recreate historic mortars applied at Norr­landa church on the island of Gotland, Sweden2008Konferensbidrag (Refereegranskat)
    Abstract [en]

    In this work, scanning electron microscopy analysis of lime slaked in different ways and analysis of thin section limeputty and mortar specimens by light microscopy was combined with practical tests and field studies in order to evaluatethe impact of the slaking technique on the properties of the lime putty, and also the structure of the fresh and carbonatedmortar. The lime slaking methods studied were wet slaking and earth slaking. These techniques give lime putties withvery different consistency and workability. The aim of this work was to use microscopy techniques to explain thesedifferences in properties and to investigate if it is possible to use these analytical methods to recognize the lime slakingtechnique used in a historical lime mortar.The results obtained by electron microscopy show significant differences in structure between the lime puttiesstudied. The earth slaked lime consists of relatively large particles that are packed in a porous system as compared to thewet slaked lime with very small particles closely packed in a dense structure. After storing, the wet slaked lime gives aputty, that has a dense and clearly defined stratified structure, whereas the earth slaked lime is porous and has nostratification. The earth slaked lime is tixotropic and has a light, smooth consistency reminding of well whipped creamcompared to the wet slaked lime that has a strong orientation and a rather stiff consistency reminding more of pudding.Microscopy investigations of thin section mortar specimens showed how the lime affects the mortar concerninghomogeneity, density, pore structure and crack patterns.

  • 40.
    Beery, Thomas H.
    et al.
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Fakulteten för lärarutbildning, Avdelningen för matematik- och naturvetenskapernas didaktik. USA.
    Lekies, Kristi S.
    Childhood collecting in nature: quality experience in important places2018Ingår i: Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A need for a more specific understanding of childhood geographies has motivated an investigation of one activity, childhood collecting in nature. This study examined collecting behavior, places of collecting, and the relationship of these places to environmental connectedness in adulthood. Topophilia is presented as a guide to help consider why children collect in nature and to expand upon a limited understanding of collecting behavior. These ideas are explored with a mixed-method design strategy involving surveys and semi-structured interviews with a sample of Swedish university students. Results show collecting in nature to be a widespread, meaningful, and memorable experience in the formative years of participants. Results also demonstrate potential support for topophilia as a way to understand the childhood collecting nature phenomenon. Implications include recognition of the importance of family to support children’s engagement in the natural world and proximate access to nature as a critical aspect of childhood experience.

  • 41.
    Beery, Thomas
    et al.
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Jönsson, K. Ingemar
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Inspiring the outdoor experience: does the path through a nature center lead out the door?2015Ingår i: Journal of Interpretation Research, ISSN 1092-5872, Vol. 20, nr 1, s. 67-85Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This study investigates the visitor experience at a Swedish nature center within aUNESCO biosphere reserve. The question of whether this interpretive facility succeedsin motivating the visitor to get outdoors for a direct experience of nature is explored. Useof the environmental connectedness perspective and concerns about diminished natureexperience support the importance of this study. A number of qualitative methodologiesare used to investigate the research questions, including thought listing, phenomenology,and field observation. Results indicate that this particular nature center generallysucceeded in the goal of inspiring visitors for a direct nature experience. The success inmotivating visitors appears to be a result of a number of key variables, including placebasedexhibitry, access, and personal visitor factors. Given the setting for this study, weconclude that interpretive nature centers have the potential to play an important role inthe re-imagination of urban environments.

  • 42.
    Beilina, Larisa
    et al.
    Department of Mathematical Sciences, Chalmers University of Technology, Gothenburg University, Gothenburg, Sweden.
    Bondestam Malmberg, John
    Department of Mathematical Sciences, Chalmers University of Technology, Gothenburg University, Gothenburg, Sweden.
    Cristofol, Michel
    Institut de Mathematiques de Marseille, CNRS, UMR 7373, Ecole Centrale, Aix-Marseille University, Marseille, France.
    Shestopalov, Yury
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för elektronik, matematik och naturvetenskap, Matematik.
    Preface for the session "recent Progress in Electromagnetic Field Theory and New Trends in Inverse Problems"2017Ingår i: AIP Conference Proceedings, ISSN 0094-243X, E-ISSN 1551-7616, Vol. 1863, artikel-id 370001Artikel i tidskrift (Refereegranskat)
  • 43. Belton, Lydia E.
    et al.
    Cameron, Elissa Z.
    Dalerum, Fredrik
    Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen. University of Pretoria, South Africa; University of Oviedo, Spa.
    Spotted hyaena space use in relation to human infrastructure inside a protected area2016Ingår i: PeerJ, ISSN 2167-8359, E-ISSN 2167-8359, Vol. 4, artikel-id e2596Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Increasing human population growth has led to elevated levels of human-carnivore conflict. However, some carnivore populations have adapted to urban environments and the resources they supply. Such associations may influence carnivore ecology, behaviour and life-history. Pockets of urbanisation sometimes occur within protected areas, so that anthropogenic influences on carnivore biology are not necessarily confined to unprotected areas. In this study we evaluated associations between human infrastructure and related activity and space use of spotted hyaenas within one of the largest protected areas in South Africa, the Kruger National Park. Home range size was smaller for the dominant female of a clan living in close proximity to humans than that of the dominant female of a clan without direct access to human infrastructure. The home range including human infrastructure was also used less evenly during the night, presumably when the animals were active. Within this home range, a village area was preferred during the night, when the least modified areas within the village were preferred and administration and highly modified areas were avoided. During the day, however, there were no preference or avoidance of the village area, but all habitats except unmodified habitats within the village area were avoided. We suggest that human infrastructure and associated activity influenced hyaena space use, primarily through alterations in the spatial distribution of food. However, these effects may have been indirectly caused by habitat modification that generated favourable hunting habitat rather than a direct effect caused by access to human food such as garbage. Because of the often pivotal effects of apex predators in terrestrial ecosystems, we encourage further work aimed to quantify how human presence influences large carnivores and associated ecosystem processes within protected areas.

  • 44.
    Berg, Emelie
    Karlstads universitet, Fakulteten för humaniora och samhällsvetenskap (from 2013), Institutionen för pedagogiska studier.
    Miljö- och naturvård i förskolans verksamhet2016Självständigt arbete på grundnivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Syftet med denna studie är att undersöka hur förskolan arbetar med konkreta miljöarbeten och hur barnen involveras. Frågeställningarna berör de olika aktörerna (barn, pedagoger och föräldrar) får inflytande och delaktighet kring arbetet med en miljöaspekt kring fenomenet hållbar utveckling. Undersökningen visar att pedagogerna upplever tydligheten i läroplanen kring ämnet samt att förskolorna jobbar konkret med exempelvis återvinning och sortering. I min undersökning har jag valt ett sociokulturellt perspektiv som insynsvinkel där lärdom skapas genom samspel med andra.

    Den metodstrategi som används i undersökningen är av kvantitativ karaktär. Jag har valt enkäter via webben som design för datainsamlingen där frågeställningarna är tydliga och mätbara. Enkätfrågorna är utformade utifrån en likertskala med fem olika grader.

    Resultatet i studien visar att förskolan arbetar med återvinning, återanvändning, utomhuspedagogik och skogspromenader för att undervisa barnen läran om miljö- och natur. Barnens intressen styr till viss del arbetet och föräldrarnas inflytande saknas generellt. Förskollärarna upplever tydlighet och känner till läroplanens riktlinjer om miljö- och naturvård. 

  • 45.
    Berge, Maria
    et al.
    Chalmers, Göteborg, Sweden.
    Adawi, Tom
    Chalmers, Göteborg, Sweden.
    Comparing Group and Individual Problem Solving: A Case Study from Newtonian Mechanics2012Konferensbidrag (Refereegranskat)
    Abstract [en]

    Previous research has demonstrated that many students not only emerge from their studies ofphysics with serious gaps in their conceptual understanding but that they also experience seriousstructural difficulties when solving physics problems, such as being able to see the structureof possible solutions and answers before actually solving the problem [1, 2]. One commonly implementedinstructional strategy to bridge these two types of gaps is to let students solve problems in groups, asthis leads to better conceptual understanding and students are able to solve more complex problems ingroups than individually [3,4]. There has, however, been very little research focusing on how the problemsolving process changes when students solve physics problems together rather than individually. In this case study, we explore differences and similarities in how students formulate and solve physicsproblems in groups and individually. The empirical data comprised video-recorded sessions of studentssolving problems in groups [5] and semi-structured interviews with other students solving thesame set of problems individually [2]. All students were enrolled in Engineering Physics at Chalmers Universityof Technology in Gothenburg, Sweden. The problems were drawn from Newtonian mechanicsand the solution to the problems required an understanding of basic notions such as force, friction, accelerationand system. Success on the problems also required an understanding of basic mathematicalnotions such as functions, systems of equations and derivatives. An analysis of the video-recordingsand the interviews revealed how the students struggled with both near- and far transfer [6, 7], i.e. transferto a similar and a different context. Moreover, different patterns of problem solving that were connectedto the social context, i.e. if the problems were solved in groups or individually, became apparent.A comparison between these contexts illustrates some of the benefits of collaborative learning. Someimplications for instruction are also discussed in the paper.

  • 46.
    Berggren, Sofia
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för kemi och biomedicin (KOB).
    Water holding capacity and viscosity of ingredients from oats: the effect of b-glucan and starch content, particle size, pH and temperature2018Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Oats is a crop that contains a high amount of fiber, protein and fat, but like all other crops it contains mostly starch. In this study the focus has been oat flours and brans with different b-glucan content. The health benefits of b-glucan, a soluble fiber are well documented and a correlation between intake of b-glucan with high molecular weight and a low glycemic response has been observed. Food with a low glycemic index can lower the risk for diseases like type 2 diabetes, cardiovascular diseases and obesity. Also a connection between intake of b-glucan with high molecular weight and a reduction of LDL-cholesterol has been observed. b-glucans from oat absorb water and build a viscous gel, which make them an interesting component when developing new products, as a fat replacer in for example meat products and pastries. To optimize the use of flours and brans with a modified b-glucan content in new applications, the water absorption was measured with a method called Solvent Retention Capacity and the viscosity with a Rapid Viscosity Analyzer (RVA). The results showed that a higher amount of b-glucan in the flour or bran, a higher water holding capacity (WHC) was observed. The WHC for oat flour with a b-glucan content at 2% was calculated to 73±7%, while the WHC for oat bran with a b-glucan content at 28%, was calculated to a WHC of 880±45%. A comparison of different flours and brans indicates that dietary fiber, where b-glucan have the greatest impact on the WHC. The result from the RVA indicates that a flour with a combination of a high b-glucan content (0.24g) and high starch content (3.72g) leads to a high viscosity 12700 cP, compared to other flours or brans with either a lower b-glucan content (0.12g) or lower starch content (0.12g) gives lower final viscosity, 5390 and 780 cP. The result also indicates that other factors such as a smaller particle size and a higher temperature during the heating step (95°C instead of 64°C) might give a higher viscosity. 

  • 47. Bergh, Johan
    et al.
    Zetterstrom, Per
    Andersen, Peter M.
    Brannstrom, Thomas
    Graffmo, Karin S.
    Jonsson, P. Andreas
    Lang, Lisa
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för biokemi och biofysik.
    Danielsson, Jens
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för biokemi och biofysik.
    Oliveberg, Mikael
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för biokemi och biofysik.
    Marklund, Stefan L.
    Structural and kinetic analysis of protein-aggregate strains in vivo using binary epitope mapping2015Ingår i: Proceedings of the National Academy of Sciences of the United States of America, ISSN 0027-8424, E-ISSN 1091-6490, Vol. 112, nr 14, s. 4489-4494Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Despite considerable progress in uncovering the molecular details of protein aggregation in vitro, the cause and mechanism of protein-aggregation disease remain poorly understood. One reason is that the amount of pathological aggregates in neural tissue is exceedingly low, precluding examination by conventional approaches. We present here a method for determination of the structure and quantity of aggregates in small tissue samples, circumventing the above problem. The method is based on binary epitope mapping using anti-peptide antibodies. We assessed the usefulness and versatility of the method in mice modeling the neurodegenerative disease amyotrophic lateral sclerosis, which accumulate intracellular aggregates of superoxide dismutase-1. Two strains of aggregates were identified with different structural architectures, molecular properties, and growth kinetics. Both were different from superoxide dismutase-1 aggregates generated in vitro under a variety of conditions. The strains, which seem kinetically under fragmentation control, are associated with different disease progressions, complying with and adding detail to the growing evidence that seeding, infectivity, and strain dependence are unifying principles of neurodegenerative disease.

  • 48.
    Berglund, Björn
    et al.
    Linköping University, Division of Medical Microbiology, Department of Clinical and Experimental Medicine, Linköping, Sweden.
    Khan, Ghazanfar Ali
    Department of Chemistry, Umeå University, Umeå, Sweden.
    Weisner, Stefan
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Våtmarkscentrum.
    Ehde, Per Magnus
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Våtmarkscentrum.
    Fick, Jerker
    Department of Chemistry, Umeå University, Umeå, Sweden.
    Lindgren, Per-Eric
    Linköping University, Division of Medical Microbiology, Department of Clinical and Experimental Medicine, Linköping, Sweden.
    Efficient removal of antibiotics in surface-flow constructed wetlands, with no observed impact on antibiotic resistance genes2014Ingår i: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 476-477, s. 29-37Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Recently, there have been growing concerns about pharmaceuticals including antibiotics as environmental contaminants. Antibiotics of concentrations commonly encountered in wastewater have been suggested to affect bacterial population dynamics and to promote dissemination of antibiotic resistance. Conventional wastewater treatment processes do not always adequately remove pharmaceuticals causing environmental dissemination of low levels of these compounds. Using constructed wetlands as an additional treatment step after sewage treatment plants have been proposed as a cheap alternative to increase reduction of wastewater contaminants, however this means that the natural microbial community of the wetlands becomes exposed to elevated levels of antibiotics. In this study, experimental surface-flow wetlands in Sweden were continuously exposed to antibiotics of concentrations commonly encountered in wastewater. The aim was to assess the antibiotic removal efficiency of constructed wetlands and to evaluate the impact of low levels of antibiotics on bacterial diversity, resistance development and expression in the wetland bacterial community. Antibiotic concentrations were measured using liquid chromatography-mass spectrometry and the effect on the bacterial diversity was assessed with 16S rRNA-based denaturing gradient gel electrophoresis. Real-time PCR was used to detect and quantify antibiotic resistance genes and integrons in the wetlands, during and after the exposure period. The results indicated that the antibiotic removal efficiency of constructed wetlands was comparable to conventional wastewater treatment schemes. Furthermore, short-term treatment of the constructed wetlands with environmentally relevant concentrations (i.e. 100-2000 ng x 1(-1)) of antibiotics did not significantly affect resistance gene concentrations, suggesting that surface-flow constructed wetlands are well-suited for wastewater treatment purposes. (c) 2014 Elsevier B.V. All rights reserved.

  • 49.
    Berglund, Johan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik.
    Projekterings- och granskningsförbättringar: Identifiering av brister och förbättringsförslag för dessa i projekterings- och granskningsprocessen av arkitekthandlingar2018Självständigt arbete på grundnivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Fastec Sverige AB har specialiserat sig på totalentreprenader av idrottshallar, industribyggnader och kommersiella byggnader. Överlappet mellan projektering och produktion i totalentreprenader gör processen känslig för fel och brister i bygghandlingar. Därför vill Fastec utreda sina brister i projekterings- och granskningsprocessen av arkitekthandlingar och se vad som kan förbättras. Syftet med arbetet är således att identifiera eventuella brister och komma med organisationsanpassade förlagsrutiner och förbättringsförslag för dessa, för att effektivisera processerna inom projekteringen och minska felen i de handlingar som lämnar den.

    För identifieringen av eventuella brister har tre projekt genomgått granskning, de har varit projekterade av interna och externa A-projektörer och ledda av projekteringsledare hos Fastec i Skellefteå. Handlingar som legat till grund för och lämnat projekteringen har granskats, så även avvikelserapporter från arbetsplatserna. Intervjusamtal och diskussioner med medverkande inom projekten samt övriga erfarna och kunniga medarbetare ur organisationen har genomförts. Även tidigare projekts erfarenhetsåterföringsprotokoll och allmänna brister i projekteringsarbetet har diskuterats i intervjusamtalen.

    De resulterande mest frekvent förekommande bristerna som identifierats är dels avtalet och valet av externa konsulter, brister i målbilden som projekteringen skall arbeta efter. Dvs. vad produktionen förväntar sig av bygghandlingarna. Bestyckningen av dörrar med tillhörande uppställningsritningar och användandet av för många väggtyper. Ytterligare det låga nyttjandet av kapaciteten i de ritnings- och granskningsprogram organisationen har till sitt förfogande. Till sist en väldigt låg frekvensen av feedback och avvikelserapportering från arbetsplatserna inom projekten.

    Förslagsrutinerna och förbättringsförslagen som bygger på de identifierade bristerna och som detta arbete kommit fram till som mest frekvent är: att förändra är att tidigt i projekteringsprocessen tillsammans med övriga deltagare inom projekten på Fastec, speciellt produktionen, skapa en klar målbild för vilken detaljnivå som förväntas av bygghandlingarna. Rationalisera projekteringen med funktionsbeskrivningar till dörrleverantörer som får genomföra bestyckningen, samt utnyttja mer av kapaciteten i de CAD- och granskningsprogram man har till sitt förfogande inom organisationen än vad som görs idag.

  • 50.
    Bergman, Anders
    RISE - Research Institutes of Sweden, Säkerhet och transport, Mätteknik.
    Influence of coaxial cable on response of high-voltage resisitive dividers2017Konferensbidrag (Refereegranskat)
    Abstract [en]

    An effort is pursued by several European National Measurement Institutes to lower the uncertainties in calibration of UHV measuring systems for lightning impulse. To this end, several reference dividers are investigated as regards their accuracy both for amplitude and for time parameters. During these investigations a deterioration of step response was identified when longer coaxial cables were inserted in the measuring circuit. The measured front time T1 was also affected, in one observed case by 2.5 % elongation of front time as another 25 m cable was inserted. Compared to the intention to calibrate front time measurement to better than 5 % uncertainty for front time, this contribution must be well known, or preferably be eliminated. This paper presents the experimental findings from these investigations. The investigated cables included selected coaxial, tri-axial, and cables with a corrugated screen. The effect of cable length was also studied. The influence was first discovered when applying a very fast step (rise-time < 4 ns) to the high voltage arm of a resistive divider and convolution of this step with the time derivative of an ideal lightning impulse with 0.84/60 µs impulse. The calculated output was analysed with IEC 61083 compliant software to evaluate the front time. Subsequently, these analyses have been augmented by additional comparative measurements where two reference dividers were connected to the same impulse generator, and varying the cable length of one of them. The summarized changes in front time calculated for different combinations of cable and impulse voltage dividers are shown and discussed. It is noted that a change in T1 error depends both on length of cable and its type. The results show that non-negligible front time errors may be introduced when the cable length is increased. To support these findings, further tests have been carried out with two reference impulse dividers connected in standard calibration configuration in accordance with IEC 60060-2. One divider was used as reference, while the cable for the other was varied. In this way, the change of error between configurations could be measured. A theoretical study has also been performed, calculating the distortion of a lightning impulse on a coaxial cable. The results agree qualitatively with experiments, but the detailed results show discrepancies that need further investigation.

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