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  • Erlingsson, Sigurdur
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Tunga trafikens samhällsekonomiska kostnader: accelererade tester av tre vägkonstruktioner2017Report (Other academic)
    Abstract [en]

    The Swedish Ministry of Enterprise and Innovation (Näringsdepartementet) has given VTI the assignment to update the knowledge about the society costs of the transport infrastructure. A part of that work is to improve our knowledge about the relationship between traffic axle loads and degradations of pavement structures.

    The objective of this report is to investigate if a simple relationship between axle loading and pavements degradation can be used as a tool for estimation of marginal costs for degradation of the entire road network. Three full scale test pavement structures have therefore been tested with an Heavy Vehicle Simulator using three half-axle load levels 40, 50 and 60 kN (corresponding to 8, 10 and 12 tonnes axle loads) to investigate the load intensity on the degradation progress. As a measure of the distress development has the linear rutting rate during testing been used after the initial exponential rutting phase was passed.

  • Public defence: 2017-04-07 10:15 Weber, Växjö
    Vainik, Anne-Lie
    Linnaeus University, Faculty of Social Sciences, Department of Social Work.
    Polisanmälningar i grundskolan2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis is about police reports concerning school violence in Sweden involving children below the age of criminal responsibility. Police reports about incidents caused by pupils in Swedish compulsory schools have increased since at least the 1980s. In research on violent, threatening and insulting acts among children in schools, incidence and causes are often studied in terms of bullying and degrading treatment. Criminological studies on children's violent acts, in schools, is mainly based on information on children aged 15 and over. Research on why police reports are filed about younger children in compulsory schools is limited. The aim of this thesis is to describe and analyse school-related police reports, in relation to children’s unwanted actions in compulsory schools with the goal of understanding the intentionality in every day practice.

    The empirical material consists of four studies of which three have been conducted using qualitative methods through analysing legal documents, using content analysis of texts in school-related police reports and interviews with Principals. The fourth study has been carried out with statistical analysis of school-related police reports. The results of the studies are presented in four papers. This thesis takes the approach from modern sociology which is used both as perspectives and theory. The perspectives concern modernity, social control and cultural sensitivity. The theoretical framework is based on theory of systems and lifeworld.

    The concluding analysis shows local differences in the assessments on which action will be reported to the police. It is mainly Principals who make reports to the police but also parents. Principals’ police reports are based on social commitment and early intervention and parents report concern about repeated school bullying of their children. Despite diverse local practices certain patterns appear. Boys in the 13-14 years age group are the ones most often seen as perpetrators in the police reports. Two particularly prominent patterns become visible at the school level. Most police reports are related to schools with low grades and to so-called resource schools. This indicates that the unwanted actions of disadvantaged children are more often reported to the police than the actions of other children. The filing of police reports can be understood as a result of difficulties among adults to reach common understanding on how children’s problems should be handled in school systems everyday practice.

  • Faletar Tanackovic, Sanjica
    et al.
    University of Osijek, Croatia.
    Golub, Koraljka
    Linnaeus University, Faculty of Arts and Humanities, Department of Cultural Sciences.
    Huvila, Isto
    Uppsala University.
    The meaning of interoperability and its implications for archival institutions: Challenges and opportunities in Croatia, Finland and Sweden2017In: Information research, ISSN 1368-1613, E-ISSN 1368-1613, Vol. 22, no 1, 1653Article in journal (Refereed)
    Abstract [en]

    Introduction. This exploratory study aims to map the premises of developing interoperability of archival holdings and the understanding of how “interoperability” is understood from an operational perspective at archival institutions. The study is based on a comparative survey of the views of archivists from Croatian, Finnish and Swedish archives on the perceived needs, barriers and preferences regarding online access and interoperability of a their metadata and holdings.

    Method. A web survey comprising 35 multiple-choice and open-ended questions focusing on current state and plans regarding online access and interoperability of the holdings and metadata of the institutions was sent out to archives in Croatia, Finland and Sweden in autumn 2015.

    Analysis. Both quantitative and qualitative analyses were carried out on the data, which related to 45 individual archives. Quantitative analysis employed the statistical package SPSS, while the qualitative analysis referred to content analysis of open questions by one of the researchers.

    Results. While the respondents are unanimous in their opinion that interoperability is important for their institutions and useful for their users, the current level of interoperability and the online access to holdings provided by the responding institutions in discrepancy with this opinion. The lack of resources and expertise could be traced back to the shortage of interest at strategic and managerial level.

    Conclusion. The findings suggest that there are several obstacles in the way to providing improved interoperability and online access to archival holdings and metadata. At the same time, there is a lack of conceptual agency that would try to redefine the problem and try to choose appropriate methods, develop meanings and relations between the concept of interoperability and the principles of archival work.

  • Kampmann, Tobias
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Age, Origin and Tectonothermal Modification of the Falun Pyritic Zn-Pb-Cu-(Au-Ag) Sulphide Deposit, Bergslagen, Sweden: Supplementary data tables2017Data set
  • Årestedt, Liselott
    Linnaeus University, Faculty of Health and Life Sciences, Department of Health and Caring Sciences.
    Den ombokade resan: att leva som familj med kronisk sjukdom2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Aim: The overall aim was to generate deepened knowledge and understanding about families’ experiences of living as a family with chronic illness. The four studies aimed to: illuminate the meaning of living as a family in the midst of chronic illness (I), illuminate illness beliefs in those families (II), illuminate the meaning of place for family well-being (III) and describe the experiences of encounters with health care in families living with chronic illness (IV).

    Methods: All studies had qualitative designs and a Family Systems Nursing perspective. Data was collected through family interviews with families where an adult family member had lived with chronic illness for more than two years. The used analyses were phenomenological hermeneutic (I,III), hermeneutic (II) and content analysis (IV).

    Results: Living as a family with chronic illness was a continuously ongoing process where families co-created a context for living with illness and alternative ways for everyday life (I). Core and secondary beliefs within and across families about illness, family, and health care were revealed and showed for how families responded to and managed situations due to illness (II). Further, the meaning of place for family well-being was described as “a shared respite”, i.e. a place for relief, reflection and re-creation. It seemed to be important for families to be in secure places to enhance well-being (III). Living with chronic illness also includes frequent encounters with health care professionals and having an accompanying member constituted a great power. It helped families to get opportunities to collaborate, and receiving confirmation in the encounters (IV).

    Conclusions: Living as a family with chronic illness is a continuously ongoing process where family members constitute support for each other. Families have a common desire to handle challenges and changes due to illness and to co-create new patterns for everyday living. Therefore, if nurses adopt a Family Nursing Perspective and involve families in health care, families’ strengths and resources can be facilitated. Then, family well-being can be strengthened.

  • Carlson, Annelie
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Rullmotstånd: vägytans egenskaper och dess inverkan2017Report (Other academic)
    Abstract [en]

    Rolling resistance is an important aspect of the road surface properties in relation to transport energy use and emissions of carbon dioxide (CO2). By reducing rolling resistance, the transport energy efficiency can be improved and the CO2 emissions can be reduced. This will help in reaching the climate targets. MIRIAM is a joint project with partners from Europe and the United States with the aim to provide better opportunities to control road transport CO2 emissions related to road surface characteristics with focus on reducing rolling resistance. The partnership covers measurement methods and equipment, tests and measurements, modeling, case studies and implementation of results.

    The purpose of this report is to provide an overview of the results published in MIRIAM. The report will give a description of what has been done in the different sub-projects and what the findings are. The compilation is based on the reports and other publications issued within MIRIAM as well as in projects that directly is connected to MIRIAM, and that is published on their websites.

  • Eek-Karlsson, Liselotte
    Linnaeus University, Faculty of Social Sciences, Department of pedagogy.
    Ungas samspel online2016Other (Other (popular science, discussion, etc.))
  • Henmyr, Viktor
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Forskningsmiljön Biomedicin. Lund University.
    Carlberg, Daniel
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Forskningsmiljön Biomedicin.
    Manderstedt, E.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Plattformen för molekylär analys. Lund University.
    Lind-Halldén, Christina
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Forskningsmiljön Biomedicin.
    Säll, T.
    Lund University.
    Cardell, L. O.
    Karolinska Institutet.
    Halldén, Christer
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Forskningsmiljön Biomedicin.
    Genetic variation of the toll-like receptors in a Swedish allergic rhinitis case population2017In: BMC Medical Genetics, ISSN 1471-2350, E-ISSN 1471-2350, Vol. 18, no 1, 18Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Variation in the 10 toll-like receptor (TLR) genes has been significantly associated with allergic rhinitis (AR) in several candidate gene studies and three large genome-wide association studies. These have all investigated common variants, but no investigations for rare variants (MAF ≤ 1%) have been made in AR. The present study aims to describe the genetic variation of the promoter and coding sequences of the 10 TLR genes in 288 AR patients.

    METHODS: Sanger sequencing and Ion Torrent next-generation sequencing was used to identify polymorphisms in a Swedish AR population and these were subsequently compared and evaluated using 1000Genomes and Exome Aggregation Consortium (ExAC) data.

    RESULTS: The overall level of genetic variation was clearly different among the 10 TLR genes. The TLR10-TLR1-TLR6 locus was the most variable, while the TLR7-TLR8 locus was consistently showing a much lower level of variation. The AR patients had a total of 37 promoter polymorphisms with 14 rare (MAF ≤ 1%) and 14 AR-specific polymorphisms. These numbers were highly similar when comparing the AR and the European part of the 1000Genomes populations, with the exception of TLR10 where a significant (P = 0.00009) accumulation of polymorphisms were identified. The coding sequences had a total of 119 polymorphisms, 68 were rare and 43 were not present in the European part of the 1000Genomes population. Comparing the numbers of rare and AR-specific SNPs in the patients with the European part of the 1000Genomes population it was seen that the numbers were quite similar both for individual genes and for the sum of all 10 genes. However, TLR1, TLR5, TLR7 and TLR9 showed a significant excess of rare variants in the AR population when compared to the non-Finnish European part of ExAC. In particular the TLR1 S324* nonsense mutation was clearly overrepresented in the AR population.

    CONCLUSIONS: Most TLR genes showed a similar level of variation between AR patients and public databases, but a significant excess of rare variants in AR patients were detected in TLR1, TLR5, TLR7, TLR9 and TLR10. This further emphasizes the frequently reproduced TLR10-TLR1-TLR6 locus as being involved in the pathogenesis of allergic rhinitis.

  • Jonsson, Agneta
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Pedagogik. Kristianstad University, Forskningsmiljön Barndom, Lärande och Utbildning (BALU).
    Williams, Pia
    Göteborgs universitet.
    Pramling Samuelsson, Ingrid
    Göteborgs universitet.
    Undervisningsbegreppet och dess innebörder uttryckta av förskolans lärare2017In: Forskning om undervisning och lärande, ISSN 2000-9674, E-ISSN 2001-6131, Vol. 5, no 1, 90-109 p.Article in journal (Refereed)
    Abstract [en]

    The aim of this study is to analyse the preschool staff’s reflections on teaching the youngest children in preschool. Conversations in focus groups with preschool staff have been used for data collection. Theoretically the study considers Billigs concept concerning argumentation that has influence on discourses in change. The concept is used to view that an utterance about something that belongs to a particular discussion, stating that teaching can be understood as an explicit or implicit contradiction to the same discussion. The results point out two discourses where the demands and rights are seen as fields of tensions where an argument for something can, at the same time constitute arguments against something. Teaching the youngest children is part of a preschool in change. With that in mind, we understand the arguments as contradictory when the concept of teaching in preschool is described by the staff, something which can be seen both within and between discourses.

  • Public defence: 2017-05-23 15:30 M108, Stockholm
    Solat Yavari, Majid
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.
    Slab Frame Bridges: Structural Optimization Considering Investment Cost and Environmental Impacts2017Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    This research encompasses the automated design and structural optimization of reinforced concrete slab frame bridges, considering investment costs and environmental impacts. The most important feature of this work is that it focusses on realistic and complete models of slab frame bridges rather than on optimization of only individual members or sections of a bridge. The thesis consists of an extended summary of publications and three appended papers. In the first paper, using simple assumptions, the possibility of applying cost-optimization to the structural design of slab frame bridges was investigated. The results of the optimization of an existing constructed bridge showed the potential to reduce the investment cost of slab frame bridges. The procedure was further developed in the second paper. In this paper, automated design was integrated to a more refined cost-optimization methodology based on more detailed assumptions and including extra constructability factors. This procedure was then applied to a bridge under design, before its construction. From the point of view of sustainability, bridge design should not only consider criteria such as cost but also environmental performance. The third paper thus integrated life cycle assessment (LCA) with the design optimization procedure to perform environmental impact optimization of the same case study bridge as in the second paper. The results of investment cost and environmental impact optimization were then compared. The obtained results presented in the appended papers highlight the successful application of optimization techniques to the structural design of reinforced concrete slab frame bridges. Moreover, the results indicate that a multi-objective optimization that simultaneously considers both environmental impacts and investment cost is necessary in order to generate more sustainable designs. The presented methodology has been applied to the design process for a time-effective, sustainable, and optimal design of concrete slab frame bridges.

  • Maziz, Ali
    et al.
    Linköping University, Faculty of Science & Engineering. Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics.
    Concas, Alexandre
    Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics. Linköping University, Faculty of Science & Engineering.
    Khaldi, Alexandre
    Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics. Linköping University, Faculty of Science & Engineering.
    Stålhand, Jonas
    Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, Faculty of Science & Engineering.
    Persson, Nils-Krister
    Swedish School of Textiles (THS), SmartTextiles, University of Borås, 50190 Borås, Sweden.
    Jager, Edwin
    Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics. Linköping University, Faculty of Science & Engineering.
    Knitting and weaving artificial muscles2017In: Science Advances, ISSN 2375-2548, Vol. 3, no 1, e1600327Article in journal (Refereed)
    Abstract [en]

    A need exists for artificial muscles that are silent, soft, and compliant, with performance characteristics similar to those of skeletal muscle, enabling natural interaction of assistive devices with humans. By combining one of humankind’s oldest technologies, textile processing, with electroactive polymers, we demonstrate here the feasibility of wearable, soft artificial muscles made by weaving and knitting, with tunable force and strain. These textile actuators were produced from cellulose yarns assembled into fabrics and coated with conducting polymers using a metal-free deposition. To increase the output force, we assembled yarns in parallel by weaving. The force scaled linearly with the number of yarns in the woven fabric. To amplify the strain, we knitted a stretchable fabric, exhibiting a 53-fold increase in strain. In addition, the textile construction added mechanical stability to the actuators. Textile processing permits scalable and rational production of wearable artificial muscles, and enables novel ways to design assistive devices.

  • Jinzhi, Lu
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Mechatronics. KTH-Royal Insititute of Technology.
    Chen, DeJiu
    KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Mechatronics.
    Törngren, Martin
    KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Mechatronics.
    Loiret, Frédéric
    KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Mechatronics.
    A Model-driven and Tool-integration Framework for Whole Vehicle Co-simulation Environments2016Conference paper (Refereed)
    Abstract [en]

    Throughout the design of automotive vehicle systems, modeling and simulation technologies have been widely used for supporting their conceptualization and evaluation. Due to the increasing complexity of such systems, the overall quality management and design process optimization are becoming more important. This in particular brings the necessity of integrating various domain-specific physical models that are traditionally based on different formalisms and isolated tools. In this paper, we present the initial concepts towards a model-driven tool-integration framework with automated managed simulation services in the system development. We exploit EAST-ADL and some other existing state-of-the-art modeling technologies as the reference frameworks for a formal system description, with the content includingrequirements, design solutions, extra-functional constraints, and verification and validation cases. Given such a formal specification, dedicated co-simulation services will be developed to provide the support for automated configuration and execution of simulation tools.

  • Eklund, Robert
    Linköping University, Department of Culture and Communication, Language and Culture. Linköping University, Faculty of Arts and Sciences.
    Statement by Robert Eklund2017In: Dagstuhl Reports, E-ISSN 2192-5283, Vol. 6, no 10, 173-175 p.Article in journal (Other academic)
    Abstract [en]

    Given a background in Speech Technology (I worked on the first concatenative speech synthesizer for Swedish, the first commercial ASR system for Swedish (now Nuance) and the first open prompt human–computer support system in Scandinavia (Telia 90 200) it has, for a long time been ”natural” for me to think in terms of interaction, and concepts like agents, avatars, Theory of Mind and interface design (auditory and visual) have all been part of parcel of my work activities during the period 1994 to (roughly) 2012....

  • Evarest Sinkwembe, Emanuel
    et al.
    Linköping University, Department of Mathematics, Mathematical Statistics . Linköping University, Faculty of Science & Engineering.
    Berntsson, Fredrik
    Linköping University, Department of Mathematics, Computational Mathematics. Linköping University, Faculty of Science & Engineering.
    Singull, Martin
    Linköping University, Department of Mathematics, Mathematical Statistics . Linköping University, Faculty of Science & Engineering.
    Yang, Xiangfeng
    Linköping University, Department of Mathematics, Mathematical Statistics . Linköping University, Faculty of Science & Engineering.
    Weather Derivatives Pricing Using Regim Switching Models2017Report (Other academic)
    Abstract [en]

    In this study we discuss the pricing of weather derivatives whose underlying weather variable is temperature. The dynamics of temperature in this study follows a two state regime switching model with a heteroskedastic mean reverting process as the base regime and a shifted regime defined by Brownian motion with mean different from zero. We develop the mathematical formulas for pricing futures contract on heating degree days (HDDs), cooling degree days (CDDs) and cumulative average temperature (CAT) indices. We also present the mathematical expressions for pricing the corresponding options on futures contracts for the same temperature indices. The local volatility nature of the model in the base regime captures very well the dynamics of the underlying process, thus leading to a better pricing processes for temperature derivatives contracts written on various index variables. We provide the description of Montecarlo simulation method for pricing weather derivatives under this model and use it to price a few weather derivatives call option contracts.

  • Trezzi, Giada
    et al.
    Universitat Autonoma de Barcelona, Spain.
    Garcia-Orellana, Jordi
    Universitat Autonoma de Barcelona, Spain.
    Rodellas, Valentí
    Universitat Autonoma de Barcelona, Spain.
    Masque, Pere
    Universitat Autonoma de Barcelona, Spain.
    Garcia-Solsona, Ester
    Universitat de Barcelona, Spain.
    Andersson, Per
    Swedish Museum of Natural History, Department of Geology.
    Assessing the role of submarine groundwater discharge as a source of Sr to the Mediterranean Sea2017In: Geochimica et Cosmochimica Acta, ISSN 0016-7037, E-ISSN 1872-9533, Vol. 200, 42-54 p.Article in journal (Refereed)
    Abstract [en]

    Submarine groundwater discharge (SGD) has been identified as an

    important source of Sr to the ocean and the SGD-driven Sr flux to the

    global ocean has been recently re-evaluated (Beck et al. 2013). However,

    the uncertainty of this value is still high because of the uncertainties

    related to the determination of SGD flow rates and the paucity of

    87Sr/86Sr data in SGD end-members. As carbonates have high Sr

    concentrations and are subjected to intense heightened weathering, they

    might significantly influence the SGD input of Sr to the ocean. Here we

    present data on Sr concentrations and 87Sr/86Sr ratios in three carbonate

    dominated sites of the western area of the Mediterranean Sea, a semienclosed

    basin characterized by abundant coastal carbonates. The

    87Sr/86Sr ratios in groundwater were lower compared to modern seawater (~

    0.70916), as expected for areas dominated by carbonate lithologies.

    Concentrations of Sr and 87Sr/86Sr ratios in groundwater showed

    conservative mixing in the studied subterranean estuaries. By using SGD

    flow rates reported in the literature for the study areas, a meteoric

    SGD-driven Sr flux of (0.12 - 2.1)·103 mol d-1 km-1 was calculated for

    the region, with a fresh SGD end-member characterized by a Sr

    concentration of 27 - 30 μM and a 87Sr/86Sr ratio of 0.708020 - 0.707834.

    Integrating these Sr data with literature data (i.e. values of Sr

    concentration and 87Sr/86Sr ratio from other lithologies as well as SGD

    flow rates), we also calculated the fresh SGD-driven Sr flux to the

    entire Mediterranean Sea, obtaining a value of (0.34 - 0.83)·109 mol y-1,

    with a 87Sr/86Sr of 0.7086 - 0.7081. Thus, for the entire Mediterranean

    basin, SGD is globally a source of Sr less radiogenic compared to

    seawater. The SGD Sr flux to the Mediterranean Sea represents 5-6% of the

    SGD Sr flux to the global ocean and the Mediterranean SGD end-member has

    higher Sr concentration (5.0 - 12 μM) than the global SGD end-member (2.9

    μM). This confirms the significant role of carbonate lithologies on SGDdriven

    Sr fluxes to seawater.

    The fresh SGD-driven Sr flux to the Mediterranean Sea is about 20 - 50%

    of the riverine Sr input and significantly higher than the input through

    atmospheric dust deposition. Therefore SGD should be considered as an

    important continental source of Sr to the basin.

  • Grasse, P.
    et al.
    GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany.
    Brezezinski, M.
    Marine Science Institute and the Department of Ecology, Evolution, and Marine Biology & University of California, USA.
    Cardinal, D.
    Sorbonne Universités, Paris, France.
    de Souza, G.F.
    ETH Zurich, Institute of Geochemistry and Petrology, Switzerland.
    Andersson, Per
    Swedish Museum of Natural History, Department of Geology.
    Closset, I.
    Sorbonne Universités, Paris, France.
    Cao, Z.
    State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China.
    Dai, M.
    State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China.
    Ehlert, C.
    Max Planck Research Group for Marine Isotope Geochemistry, University of Oldenburg, Germany.
    Estrade, N.
    University of British Columbia, Vancouver, British Columbia,.
    Francois, R.
    University of British Columbia, Vancouver, British Columbia,.
    Frank, M.
    GEOMAR, Helmholtz Centre for Ocean Research Kiel, Germany.
    Jiang, G.
    Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
    Jones, J.L.
    Marine Science Institute and the Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara USA.
    Kooijman, E.
    Swedish Museum of Natural History, Department of Geology.
    Liu, Q.
    Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
    Lu, D.
    Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
    Pahnke, K.
    Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, Germany.
    Ponzevera, E.
    Unité de Recherche Géosciences Marines, IFREMER, Brest, France.
    Schmitt, M.
    Swedish Museum of Natural History, Department of Geology.
    Sun, S.
    Department of Environmental Science and Analytical Chemistry, Stockholm University, Sweden.
    Sutton, J.N.
    Universite de Brest, CNRS, IRD, IFREMER, LEMAR, IUEM, France.
    Thil, F.
    LSCE/IPSL - Laboratoire des Sciences du Climat et de l'Environnement, Gif sur Yvette, France.
    Weis, D.
    University of British Columbia Pacific Center for Isotopic and Geochemical Research, Vancouver, British Columbia,Canada .
    Wetzel, F.
    ETH Zurich, Institute of Geochemistry and Petrology, Switzerland.
    Zhang, A.
    State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China.
    Zhang, J.
    State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China.
    Zhang, Z.
    State Key Laboratory of Marine Environmental Science,Xiamen University,.
    GEOTRACES Intercalibration of the Stable Silicon Isotope Composition of Dissolved Silicic Acid in Seawater2017In: Journal of Analytical Atomic Spectrometry, ISSN ISSN 0267-9477, Vol. 32, 562-578 p.Article in journal (Refereed)
    Abstract [en]

    The first inter-calibration study of the stable silicon isotope composition of dissolved silicic acid in seawater, d30Si(OH)4, is presented as a contribution to the international GEOTRACES program. Eleven laboratories from seven countries analyzed two seawater samples from the North Pacific subtropical gyre (Station ALOHA) collected at 300 m and at 1000 m water depth. Sampling depths were chosen to obtain samples with a relatively low (9 mmol L-1, 300 m) and a relatively high (113 mmol L-1, 1000 m) silicic acid concentration as sample preparation differs for low- and high concentration samples. Data for the 1000 m water sample were not normally distributed so the median is used to represent the central tendency for the two samples. Median d30Si(OH)4 values of +1.66‰ for the low-concentration sample and +1.25‰ for the high-concentration sample were obtained. Agreement among laboratories is overall considered very good; however, small but statistically significant differences among the mean isotope values obtained by different laboratories were detected, likely reflecting inter-laboratory differences in chemical preparation including preconcentration and purification methods together with different volumes of seawater analyzed, andthe use of different mass spectrometers including the Neptune MC-ICP-MS (Thermo Fisher™, Germany), the Nu Plasma MC-ICP-MS (Nu Instruments™, Wrexham, UK), and the Finnigan™ (now Thermo Fisher™, Germany) MAT 252 IRMS. Future studies analyzing d30Si(OH)4 in seawater should also analyze and report values for these same two reference waters in order to facilitate comparison of data generated among and within laboratories over time.

  • Gustafsson, Anna
    Swedish Environmental Protection Agency . Executive, Länsstyrelser, Länsstyrelsen Stockholm. Naturvatten i Roslagen AB.
    Vattenväxtinventering i Stockholms län 2016: Inventering av sjöarna Gavel-Långsjön och Mellansjön samt om styvnate i Sparren2017Report (Other academic)
    Abstract [sv]

    Följande rapport presenterar en vattenväxtinventering av sjöarna Gavel-Långsjön i Norrtälje och Uppsala kommuner samt Mellansjön i Värmdö kommun. Inventeringsmetoden har i stort följt undersökningstypen för makrofyter i sjöar och kan därmed användas för att klassa sjöarnas ekologiska status med avseende på makrofyter. Inventeringen bekostades av Länsstyrelsens anslag för regional miljöövervakning. Dessutom redogörs för ett uppdrag inom Åtgärdsprogram för hotade arter som innebar kartering och vegetationsrensning vid länets enda aktuella lokal för styvnate, sjön Sparren i Norrtälje och Vallentuna kommuner. Inventeringen har utförts av Naturvatten i Roslagen AB och Anna Gustafsson har författat rapporten.

  • Lundmark, Ralf
    et al.
    Swedish Environmental Protection Agency . Taiga Natur.
    Thuresson, Mats
    Swedish Environmental Protection Agency . Executive, Länsstyrelser, Länsstyrelsen Stockholm.
    Hedenbo, Per
    Swedish Environmental Protection Agency . Executive, Länsstyrelser, Länsstyrelsen Västmanlands län.
    Fågelskär i Mälaren 2016: Heltäckande inventering av kolonihäckande sjöfågel2017Report (Other academic)
    Abstract [sv]

    Länsstyrelserna i Uppsala, Södermanlands, Västmanlands och Stockholms län bedriver tillsammans med Mälarens vattenvårdsförbund fågelinventering i Mälaren som en del av den regionala miljöövervakningen. Ralf Lundmark har under 2016 fungerat som fältprojektledare och har författat ett underlag till föreliggande resultatrapport. Per Hedenbo, Länsstyrelsen i Västmanlands län, har producerat områdeskartan samt sammanställt tabellerna över antal inventerade fåglar som återfinns i slutet av dokumentet.

  • Katic, Janko
    et al.
    KTH, School of Information and Communication Technology (ICT), Elektronics, Integrated devices and circuits.
    Rodriguez, Saul
    KTH, School of Information and Communication Technology (ICT), Elektronics, Integrated devices and circuits.
    Rusu, Ana
    KTH, School of Information and Communication Technology (ICT), Elektronics, Integrated devices and circuits.
    An Adaptive FET Sizing Technique for HighEfficiency Thermoelectric Harvesters2016In: 2016 IEEE International Conference on Electronics, Circuits and Systems (ICECS), Monte Carlo: IEEE, 2016, 504-507 p.Conference paper (Refereed)
    Abstract [en]

    A theoretical analysis of losses in low power thermoelectric harvester interfaces is used to find expressions for properly sizing the power transistors according to the input voltage level. These expressions are used to propose an adaptive FET sizing technique that tracks the input voltage level and automatically reconfigures the converter in order to improve its conversion efficiency. The performance of a low-power thermoelectric energy harvesting interface with and without the proposed technique is evaluated by circuit simulations under different input voltage/power conditions. The simulation results show that the proposed technique improves the conversion efficiency of the energy harvesting interface up to 12% at the lowest input voltage/power levels.

  • Willner, Sam
    Linköpings universitet.
    Gender and Mortality with Regard to Marital Status in 19th Century Sweden2001In: Nordic Demography in History and Present-Day Society / [ed] Lars-Göran Tedebrand och Peter Sköld, Umeå: Umeå universitet , 2001, 233-244 p.Chapter in book (Other academic)
  • Ringström, Hans
    KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Mathematics (Div.).
    Proof of the cosmic no-hair conjecture in the T3-Gowdy symmetric Einstein-Vlasov setting2016In: Journal of the European Mathematical Society (Print), ISSN 1435-9855, E-ISSN 1435-9863, Vol. 18, no 7, 1565-1650 p.Article in journal (Refereed)
  • Zhang, Hong
    et al.
    School of Medicine, Örebro University, Örebro, Sweden.
    Zhu, Zhen-Long
    Department of Pathology, The First Hospital of Hebei Medical University, Shijiazhuang, China.
    Wang, Da-Wei
    Department of Stomatology, The Third Hospital of Hebei Medical University, Shijiazhuang, China.
    Yang, Yan-Hong
    Department of Pathology, The First Hospital of Hebei Medical University, Shijiazhuang, China.
    Wang, Hao
    Department of Stomatology, The Third Hospital of Hebei Medical University, Shijiazhuang, China.
    Sun, Xiao-Feng
    Linköping University, Department of Clinical and Experimental Medicine, Division of Clinical Sciences. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Surgery, Orthopaedics and Cancer Treatment, Department of Oncology.
    Upregulation of nucleoporin 88 is associated with nodal metastasis and poor differentiation in oral squamous cell carcinoma2016In: International Journal of Clinical and Experimental Medicine, ISSN 1940-5901, E-ISSN 1940-5901, Vol. 9, no 5, 8399-8404 p.Article in journal (Refereed)
    Abstract [en]

    Nucleoporin 88 (Nup 88) is a component of the nuclear pore complexes (NPCs) that mediates nucle-ocytoplasmic trafficking of macromolecules, Nup 88 has been reported to be up-regulated in a wide variety of malignancies. Studies show that overexpression of this antigen is associated with the development, agressiveness, differentiation and prognosis in some tumours. Since no study has been carried out in the relationship between the Nup 88 expression and clinicopathological features in the patients with oral squamous cell carcinoma (OSCC), this study aimed to determine Nup 88 expression in OSCC and its clinicopathological significance. Nup 88 expression was examined by immunohistochemistry in 20 normal oral mucosa specimens and 83 OSCC tissues. The frequency of positive Nup 88 expression was gradually increased from normal oral mucosa (10%) to primary OSCC (40%, P=0.012). The Nup 88 positive rate in OSCC patient with nodal metastasis was significantly higher than those with-out nodal metastasis(64% vs. 21%, P=0.000085). The frequency of positive Nup 88 expression was significantly different between worse and better differentiation (80 vs. 27%, P=0.000024). Nup 88 expression was not related to the patients’ gender, age, location and tumour size (P>0.05). In conclusion, Nup 88 may play an important role in tumorigenesis in oral squamous cell carcinoma. Upregulation of Nup 88 is associated with nodal metastasis and poor differentiation in oral squamous cell carcinoma.

  • Mamelund, Svenn-Erik
    Högskolan i Oslo.
    Mortality and Life Expectancy in Rendalen and Norway 1770-1900: Period and Cohort Perspective2001In: Nordic Demography in History and Present-Day Society / [ed] Lars-Göran Tedebrand and Peter Sköld, Umeå: Umeå universitet , 2001, 201-231 p.Chapter in book (Other academic)
  • Garðarsdóttir, Ólöf
    et al.
    University of Iceland.
    Guttormsson, Loftur
    University of Iceland.
    Regional Aspects of the Development of Health Reforms and the Decline in Infant Mortality in 19th Century Iceland2001In: Nordic Demography in History and Present-Day Society / [ed] Lars-Göran Tedebrand, Umeå: Umeå universitet , 2001, 179-200 p.Chapter in book (Other academic)
  • Public defence: 2017-04-18 14:00 FA31, Stockholm
    Basso, Simone
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Power Safety.
    Particulate Debris Spreading and Coolability2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    In Nordic design of boiling water reactors, a deep water pool under the reactor vessel is employed for the core melt fragmentation and the long term cooling of decay heated corium debris in case of a severe accident. To assess the effectiveness of such accident management strategy the Risk-Oriented Accident Analysis Methodology has been proposed. The present work contributes to the further development of the methodology and is focused on the issue of ex-vessel debris coolability.

    The height and shape of the porous debris bed are among the most important factors that determine if the debris can be cooled by natural circulation of water. The bed geometry is formed in the process of melt release, fragmentation, sedimentation and packing of the debris in the pool. Bed shape is affected by the coolant flow that induces movement of particles in the pool and after settling on top of the bed. The later one is called debris bed self-leveling phenomenon.

    In this study, the self-leveling was investigated experimentally and analytically. Experiments were carried out in order to collect data necessary for the development of a numerical model with an empirical closure. The self-leveling model was coupled to a model for prediction of the debris bed dryout. Such coupled code allows to calculate the time necessary to have a coolable configuration of the bed. The influence of input parameters was assessed through sensitivity analysis in order to screen out the less influential parameters.

    Results of the risk analysis are reported as complementary cumulative distribution functions of the conditional containment failure probability (CCFP).

    Sensitivity analyses identified: effective particle diameter and debris bed porosity as the parameters that provide the largest contribution to the CCFP uncertainty. It is found that the effect of the initial maximum height of the bed on the CCFP is reduced by the self-leveling.

  • Fure, Eli
    The Decline in Mortality in the Norwegian Parish Asker and Baerum ca. 1750-18502001In: Nordic Demography in History and Present-Day Society / [ed] Lars-Göran Tedebrand and Peter Sköld, Umeå: Umeå universitet , 2001, 165-177 p.Chapter in book (Other academic)
  • Duvander, Ann-Zofie E.
    Stockholms universitet.
    Who Plans to Marry and Who Marries? A Study of Men's Propensity to Marry in Sweden in the Early 1990s2001In: Nordic Demography in History and Present-Day Society, Umeå: Umeå universitet , 2001, 101-120 p.Chapter in book (Other academic)
  • Public defence: 2017-04-26 13:00 F3, Stockholm
    Moyo, Kerbina
    KTH, School of Architecture and the Built Environment (ABE), Real Estate and Construction Management, Real Estate Planning and Land Law.
    Women's Access to Land in Tanzania: The Case of the Makete District2017Doctoral thesis, monograph (Other academic)
    Abstract [en]

    Access to land is crucial for combating discrimination. Women who are denied such access tend to be disadvantaged, a pattern that results in economic powerlessness. Tanzana is among the most undeveloped nations in the world, where gender inequalities with respect to accessing land are central problems. This study consequently aims at investigating women's access to land through customary land tenure in the Makete district in Tanzania. A case study strategy was adopted to address the research problem, whereby interviews, focus group discussions and documentary reviews were the main data collection methods.

    The findings indicate that the majority of women within villages are illiterate; unaware of any existing entitlements and lacking insufficient assets to fight for their rights, and that their involvement in land administration institutions is limited. At the familiy level, daughters and women are deprived of any right to possess land through inheritance because relatives believe they will be married to other families from which they will then gain access to land. This generally has been proven not to be the case. After marriage, women commonly are apportioned land strictly for crop cultivation (usufruct rights). Consequently, there are many challenges in realising women's property rights in Tanzania. These challenges include the dualisim of the property rights system: customary tenure operates alongside statutory tenure; inadequate knowledge about women's property rights by both women and men; negative attitudes towards women's influence, position, capability and reputation; outdated customs; archaic and conflicting interests in laws; and lack of legal capacity (empowerment) as to property rights.

    The most important tools for meeting these challenges include education and awareness campaigns that are designed to build the capacity of citizens as to the necessity of equity in access to property rights (land) using various legal tools at varying levels. Other measures include amending and repealing outdated laws, including provisons dicriminating against women's property rights and contradicting constitutional provisons and other international instruments. Other avenues are advocacy and working for behavioural chages can also be invoked by empowering individuals at all stages of life, supporting their involvement in productive activities and creating group networks, and facilitating the formation of community-based organisations as well as building capacity by mainstreaming land adminstration institutions.

  • Daugaard, Solveig
    Linköping University, Department of Culture and Communication, Language and Culture. Linköping University, Faculty of Arts and Sciences.
    En kvantefysiker går til kamp mod verdens undergang: Anmeldelse af Peter Høeg, Effekten af Susan2014In: Kritik, ISSN 0454-5354, no 211, 197-183 p.Article, book review (Other (popular science, discussion, etc.))
  • Daugaard, Solveig
    Linköping University, Department of Culture and Communication, Language and Culture. Linköping University, Faculty of Arts and Sciences.
    Åh, Instagram: Anmeldelse af Mads Eslund imnothererepresentinghardbodies2016In: Dagbladet InformationArticle, book review (Other (popular science, discussion, etc.))
  • Daugaard, Solveig
    Linköping University, Department of Culture and Communication, Language and Culture. Linköping University, Faculty of Arts and Sciences.
    Den kulturelle skam overvundet med humor2015In: Dagbladet InformationArticle in journal (Other (popular science, discussion, etc.))
  • Daugaard, Solveig
    Linköping University, Department of Culture and Communication, Language and Culture. Linköping University, Faculty of Arts and Sciences.
    Brontë gjorde kvindeligt navlepilleri muligt2015In: Dagbladet InformationArticle in journal (Other (popular science, discussion, etc.))
  • Daugaard, Solveig
    Linköping University.
    Krukkens efterfølgere2014In: Dagbladet InformationArticle in journal (Other (popular science, discussion, etc.))
  • Daugaard, Solveig
    Linköping University, Department of Culture and Communication, Language and Culture. Linköping University, Faculty of Arts and Sciences.
    Også James Joyce måtte sno sig for at få sine værker trykt2016In: Dagbladet InformationArticle in journal (Other (popular science, discussion, etc.))
  • Volkwyn, Trevor
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Physics Didactics. University of the Western Cape.
    Airey, John
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Physics Didactics. Stockholm University.
    Gregorcic, Bor
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Physics Didactics.
    Heijkenskjöld, Filip
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Physics Didactics.
    Multimodal transduction in secondary school physics2016Conference paper (Refereed)
    Abstract [en]

    Teaching always involves the use of a range of modes (see for example discussion in Bezemer & Kress, 2008). Nowhere is this more apparent than in the teaching of physics, where semiotic resources such as spoken and written language, graphs, diagrams, mathematics, hands on work with apparatus, etc., all need to be appropriately orchestrated in order for students to construct established disciplinary meanings (Lemke, 1998). In this respect it has been argued that there is a critical constellation of modes that is needed for construction of any given disciplinary concept; and that it is the development of “fluency” of translation (transduction) between these modes that makes learning possible (Airey & Linder, 2009).

    Building on this work, we video-filmed secondary physics students working with a laboratory task designed to encourage transduction when learning about coordinate systems.

    Students worked with a small electronic measurement device, IOLab that can be held in the hand. IOLab is linked wirelessly to a computer, which in this case was used to graphically display the x, y and z components of the Earth’s magnetic field. Our intention was for students to practice linking the static representations of coordinate systems in their textbooks to dynamic, real-time changes in the x, y and z values displayed on the computer screen as they manipulated the IOLab.

    Preliminary data analysis confirms that the introduction of the IOLab device did indeed promote the desired transduction. However, we also report another finding. The IOLab appeared to function as a catalyst for transduction into an unexpected mode—gesture—with coordinate systems being represented using arms and legs.

    Based on these preliminary findings, we suggest that one of the pedagogical affordances (Airey, 2015) of the IOLab device may be facilitating the introduction of gesture into the physics laboratory.

    A reference list is included at the end of the presentation and in a separate file named References.

  • Huang, Hui
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science. Shandong University.
    Electrochemical Application and AFM Characterization of Nanocomposites: Focus on Interphase Properties2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The use of graphene and conductive polyaniline nanomaterials in the field of electrochemistry is increasing due to their excellent conductivity, rapid electron transfer and high specific surface area. However, these properties are strongly dependent on the preparation processes. To accelerate the development of advanced electrochemical sensors for the simultaneous detection of trace amounts of heavy metal ions, two facile and green methods are proposed to improve their performance in this thesis. The first one was dedicated to make graphene-carbon nanotube hybrid nanocomposites. The introduction of carbon nanotubes not only greatly enhances the conductivity of graphene but also suppresses, to some degree, the aggregation between graphene nanosheets. Another method proposed in this thesis work was to synthesize a phytic acid doped polyaniline nanofiber based nanocomposite. The synergistic contribution from polyaniline nanofibers and phytic acid enhances the accumulation efficiency and the charge transfer rate of metal ions during the differential pulse anodic stripping voltammetry analysis. The above-mentioned nanocomposite modified electrodes were all successfully applied to real samples for the simultaneous detection of Cd2+ and Pb2+ with good recovery rates. Meanwhile, corrosion protection is another important branch in the field of electrochemistry. In this direction, an active alkyd-polyaniline composite coating with self-healing functionality was prepared. The polyaniline used in this thesis was doped with p-toluene sulfonic acid, which was employed to increase the conductivity of polyaniline, and 1 wt.% of as-prepared polyaniline nanoparticles were found to offer an effective conductive network for anticorrosion. Finally, the reasons that such low loading levels of nanomaterials can result in significantly reinforced properties in nanocomposites were studied with combined atomic force microscopy (AFM) techniques. The results demonstrated that the interphase for a 40-nm-sized silica particle could extend to 55–70 nm in poly(ethyl methacrylate) (PEMA) and poly(isobutyl methacrylate) (PiBMA) polymer matrix, and the interphase exhibited a gradient distribution in surface nanomechanical properties.

  • Naderi, Ali
    et al.
    RISE, Innventia.
    Larsson, Per Tomas
    RISE, Innventia.
    Stevanic Srndovic, Jasna
    RISE, Innventia.
    Lindström, Tom
    RISE, Innventia.
    Erlandsson, Johan
    Effect of the size of the charged group on the properties of alkoxylated NFCs2017In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 24, no 3, 1307-1317 p.Article in journal (Refereed)
    Abstract [en]

    The impact of the size of the charged group on the properties of alkoxylated NFC was studied by two chloroalkyl acid reagents. It was found that the employment of the larger 2-chloropropionic acid reagent leads to improved properties, e.g. higher fraction of nano-sized materials, and significantly better redispersion as compared to when the smaller monochloroacetic acid was employed. The differences in the impacts of the different reagents were hypothesized to be due to a more efficient disruption of the cohesion between the nanofibrils when a larger charged group was employed. 

  • Olande, Oduor
    Mid Sweden University.
    Students' narratives from graphical artefacts: Exploring the use of mathematics tools and forms of expression in students' graphicacy2013Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The research concerns presented in this dissertation addresses aspects of students’ interaction with commonly occurring graphical artefacts in teaching and learning environments. In particular, focus is on how the students make sense of these artefacts in relation to subject specific tools and forms of expression.

    The dissertation comprises of four studies guided by a semiotics cultural- historical perspective to cognition. The first study which is largely quantitative, analyses the percentage scores from students’ responses to selected items from OECD PISA surveys for items containing graphical elements. The second and the third studies in keeping with a more sociocultural perspective to learning as point of departure, examine the students’ collaborative interaction around tasks containing graphical elements. The fourth study explores the nature of students’ solutions from the Swedish national test in mathematics based on a tools and forms of expression sensitive empirically derived construct of Identification contra Critical-analytical approach to graphicacy.

    The main outcomes of these studies can be summarised as follows: first there is justification for re-examining the predominant characterisation of students’ interaction with graphical artefacts. Secondly, while it is not uncommon for students to take a more visual-perceptive and intuitive approach to graphicacy, results from task items interactions indicate that a Critical-analytical approach seems to be more reliable and capable of yielding desirable outcomes. The outcomes of these studies call for vigilance on the type of tasks used in relation to graphicacy and how these can be used to foster students’ Critical-analytical disposition.

  • Lindgren, Charlotte
    et al.
    Dalarna University, School of Humanities and Media Studies, French.
    Johansson, Sören
    Dalarna University, School of Humanities and Media Studies, Sound and Music Production.
    Rosenkvist, Wei Hing
    Dalarna University, School of Humanities and Media Studies, Chinese.
    Malmsten, Solveig
    Dalarna University, School of Humanities and Media Studies, Swedish.
    Charlotte Lindgren intervjuar Wei Hing Rosenkvist och Solveig Malmsten inför Grammatikdagen 2017 vid Högskolan Dalarna2017Other (Other (popular science, discussion, etc.))
    Abstract [sv]

    Sören Johansson, universitetsadjunkt i ljud- och musikproduktion och Charlotte Lindgren, universitetslektor i franska, är båda pedagogiska utvecklare vid Akademin Humaniora och Medier, Högskolan Dalarna. De har producerat denna podcast om grammatikundervisning i språk för att uppmärksamma årets Grammatikdag. Den 17 mars 2017 är det nämligen dags att fira Grammatikdagen. Grammatikdagen är ett ideellt initiativ med Språkkonsulterna och Svensklärarföreningen som huvudarrangörer. Dagen firas på skolor och universitet, mer information finns på www.grammatikdagen.se. Podcasten innehåller en intervju med Wei Hing Rosenkvist, lektor i kinesiska och Solveig Malmsten, lektor i svenska vid Högskolan Dalarna.

  • Public defence: 2017-04-07 10:00 Vivi Täckholmsalen (Q-salen), NPQ-huset, Stockholm
    von Essen, Gabriella
    Stockholm University, Faculty of Science, Department of Molecular Biosciences, The Wenner-Gren Institute.
    Energy flow and metabolic efficiency attributed to brown adipose tissue2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The large capacity of brown adipose tissue (BAT) to expend energy as heat makes it an interesting potential player in weight regulation and other metabolic conditions. This is of particular interest as it has been recognized that adult humans possess BAT. The protein responsible for the heat production is uncoupling protein 1 (UCP1), which, as the name implies, uncouples the respiratory chain from ATP production; instead heat is produced. Cold is the strongest recruiter and activator of BAT. However, also obesogenic food has a low but nonetheless significant effect on the recruitment and activation of UCP1, although the significance of this has been discussed.

    In the present thesis, I have studied the effect of diet on BAT and the possibilities for it to be obesity-protective. This can be done by comparing responses in wild-type mice and in UCP1-ablated mice. Since the effect of diet on BAT is low, it is of importance to control the temperature and maintain thermoneutrality. Other confounding factors to keep in mind are differences in actual energy and composition of food and also cohort differences. When controlling all the parameters mentioned and giving the mice the same obesogenic diet, the mice possessing UCP1 compared to UCP1-ablated mice had higher energy expenditure, and lower weight gain, despite eating more. This confirms the presence of a UCP1-dependent diet-induced thermogenesis. Thus, the conclusion must be that possessing UCP1 does result in obesity protection at thermoneutrality. However, the relevance for human energy balance is still not established.

  • Public defence: 2017-04-07 13:00 sal FA32, AlbaNova universitetscentrum, Stockholm
    Jakobsson, Emma
    Stockholm University, Faculty of Science, Department of Physics.
    Shapes of Spacetimes: Collected tales of black holes2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    In theory, the existence of black holes is predicted by general relativity. In reality, there is a general consensus that they exist in space; in particular at the center of many galaxies. The theory of black holes has been around for decades, but there are still interesting questions calling for attention. This doctoral thesis and its four contributions touches upon some of these questions.

    One challenging theoretical aspect of black holes lies in their definition, the event horizon. For several reasons, this definition is not satisfactory in many contexts, and alternative horizons based on the concept of trapped surfaces have been suggested to take its place. The question raised in Paper I has to do with the location of such surfaces in a simple model of gravitational collapse, the Oppenheimer-Snyder model.

    A different scenario of gravitational collapse, that of a null shell of dust collapsing in flat spacetime, is the starting point of the original formulation of the Penrose inequality. By a reformulation, this inequality can be turned into a purely geometric relation in Minkowski space. In Paper IV we formulate and prove a (2+1)-dimensional version in anti-de Sitter space.

    The Penrose inequality sometimes goes under the name of the "isoperimetric inequality for black holes". In Paper III a different kind of isoperimetric inequality is discussed (with less rigour), namely that of the volume contained in a black hole with a given area.

    In Paper II, the subject of limits of spacetimes is visualized. Again, (2+1)-dimensional anti-de Sitter space finds its use, as a one parameter family of surfaces, capturing the geometry of charged black hole spacetimes, is embedded in it. Thus different limiting procedures are illustrated.

    Finally, interesting models can be constructed by cutting and gluing in spacetimes, but in doing so one needs to take care, in order to obtain a physically realistic model. With this background as motivation, a study of Lorentzian cones is given.

    Taken together, all of these contributions make up a collection of interesting aspects of black hole geometry, or, shapes of spacetimes.

  • Zetterholm, My
    et al.
    Linnaeus University, Faculty of Technology, Department of Informatics.
    Brandt, Patrik
    Linnaeus University, Faculty of Technology, Department of Informatics.
    Jokela, Päivi
    Linnaeus University, Faculty of Technology, Department of Informatics.
    Physio-digital Convergence: Aspects on Security2016In: Proceedings of 7th International Conference “Information Systems and Technology Innovations: the New Paradigm for a Smarter Economy" / [ed] Kozeta Sevrani, Tirana: University of Tirana , 2016, 1Conference paper (Refereed)
    Abstract [en]

    The fast progressing development of mobile technologies and health applications has given rise to trends like health tracking and quantify self. This kind of mobile health applications can measure an increasing amount of physiological parameters, which implies an increasing interconnectivity between users and mobile technologies. An explorative pre-study was made which studied the relation between users and mobile technologies on students in Sweden and Albania. The results imply an increasing interconnectivity between users and mobile technologies and this can be considered as both a physical and psychological phenomenon. From a system perspective the physiological and digital systems can be seen as converging, driven by both technical innovations and user behavior. This blurring of system boundaries requires for reflections within philosophy and ethics as well as security and integrity. The concept of Physio-digital convergence is proposed as a perspective to further analyze this development. Recommendations on further research include integrity and security issues, which are both pointed out as critical aspects in this context. 

  • Chen, Zheng
    et al.
    Linköping University, Department of Electrical Engineering, Communication Systems. Linköping University, Faculty of Science & Engineering.
    Pappas, Nikolaos
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
    Kountouris, Marios
    Huawei Technologies, France.
    Energy Harvesting in Delay-Aware Cognitive Shared Access Networks2017In: IEEE Workshop on Emerging Energy Harvesting Solutions for 5G Networks (5G-NRG), IEEE, 2017Conference paper (Refereed)
    Abstract [en]

    In this work, we study the effect of energy harvesting in a cognitive shared access network with delay constraints on the primary user. We model the distribution of secondary nodes by a homogeneous Poisson point process (PPP), while the primary user is located at fixed location. The secondary users are assumed to have always packets to transmit whilst the primary transmitter has bursty traffic. We assume an energy harvesting zone around the primary transmitter and a guard zone around the primary receiver. The secondary users are transmitting in a random access manner, however, transmissions of secondary nodes are restricted by their battery status and location. Targeting at achieving the maximum secondary throughput under primary delay constraints, we analyze the impact of various parameters on the performance of the considered network. Our results provide insights into the optimization of access protocol parameters for the energy harvesting-based cognitive shared access network with delay constraints. 

  • Elfgren, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
    Maskinfundament: Beräkning av egensvängningar1984Other (Other academic)
    Abstract [sv]

    En metod presenteras för att beräkna translations- och translationssvängningar för maskinfundament av betong. Metoden illustreras med ett beräkningsexempel.

  • Hefni, Mohammed E.
    et al.
    Linnaeus University, Faculty of Health and Life Sciences, Department of Chemistry and Biomedical Sciences. Mansoura University, Egypt.
    Shalaby, Mohamed T.
    Mansoura University, Egypt.
    Mohamed, Rasha A.
    Mansoura University, Egypt.
    Elwa, Ahmad M.
    Mansoura University, Egypt.
    Witthöft, Cornelia M.
    Linnaeus University, Faculty of Health and Life Sciences, Department of Chemistry and Biomedical Sciences.
    Effect of a 12-Week Dietary Intervention with Folic Acid or Folate-Enhanced Foods on Folate Status in Healthy Egyptian Women2016In: Food and Nutrition Sciences, ISSN 2157-944X, E-ISSN 2157-9458, Vol. 7, 1339-1351 p.Article in journal (Refereed)
    Abstract [en]

    The Egyptian government introduced wheat-flour fortification with iron and folic acid to reduce the incidence of neural tube defects, but suspended it for technical reasons. We previously developed novel legume foods with enhanced folate content. In this study, we investigated the efficacy of 12-week intervention with folate-en- hanced foods versus folic acid supplement in improving folate status in Egyptian women. A randomized, parallel intervention trial with two active groups (n = 19, n = 18) and one blinded control group (n = 20) was executed over 12 weeks. Volunteers received either germinated legume foods and orange juice (≈250 μg/d folate) or folic acid supplement (500 μg/d) or apple juice (0 μg/d folate). Folate status was assessed by erythrocyte and plasma folate and total homocysteine (tHcy) at day 0, and after 8 and 12 weeks of intervention. After 12 weeks, mean plasma folate increased by 14 (P < 0.0001) and 12 (P < 0.0001) nmoL in the folic acid and food group, respectively. Erythrocyte folate concentration increased in the folic acid group from 614 to 912 (P < 0.0001) and in the food group from 631 to 914 nmoL (P < 0.0001). After 12 weeks, 90% of subjects in the folic acid group and 70% in the food group had erythrocyte folate concentrations exceeding 906 nmol/L. tHcy concentration was decreased by 20% (P = 0.007) and 18% (P = 0.006) in the folic acid and food group, respectively, but remained unchanged in the control group during intervention. Folate-enhanced foods effectively improve folate status in women of reproductive age. These foods could be used as a complement to folic acid fortification 

  • Bengtsson, Niklas
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Economics.
    Are Religions for Sale? Evidence from the Swedish Church Revolt over Same-Sex Marriage2017Report (Other academic)
    Abstract [en]

    Religious leaders sometimes condemn progressive social norms. In this paper,I revisit David Hume’s hypothesis that secular states can “bribe” churches intoadopting less strict religious doctrines. The hypothesis is difficult to test due toreverse causality: more liberal theologies may attract more political support inthe first place. To circumvent this problem, I focus on a theological conflict oversame-sex marriage within the Church of Sweden and take advantage of politicalregulations that effectively make some parishes shareholders of the church’sstate-protected property. The shares used for statistical identification are tied toproperty rights assigned more than 300 years ago, and they cannot be sold, tradedor amended by the individual parishes. I find that priests in shareholding parishesare less likely to publicly oppose same-sex marriage. The effect is stronger inparishes with more conservative members. The combined results are consistentwith a model of clerical opportunism, in which access to political rents increasesthe clergy’s loyalty to the political sponsors relative to the local community.

  • Lundberg, Evelina
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Economics.
    Svaleryd, Helena
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Economics.
    Birth Order and Child Health2017Report (Other academic)
    Abstract [en]

    Previous research has established that birth order affects outcomes such as educational achievements, IQ and earnings. The mechanisms behind these effects are, however, still largely unknown. In this paper, we examine birth-order effects on health, and whether health at young age could be a transmission channel for birth-order effects observed later in life. We find no support for the birth-order effect having a biological origin; rather firstborns have worse health at birth. This disadvantage is reversed in early age and later-born siblings are more likely to be hospitalized for injuries and avoidable conditions, which could be related to less parental attention. In adolescence and as young adults, younger siblings are more likely to be of poor mental health and to be admitted to hospital for alcohol induced health conditions. We also critically test for reverse causality by estimating fertility responses to the health of existing children. We conclude that the effects on health are not severely biased; however, the large negative birth-order effects on infant mortality are partly due to endogenous fertility responses. Overall our results suggest that birth order effects are due to differential parental investment because parents’ time and resources are limited.

  • Public defence: 2017-03-31 10:00 Gladan, Stockholm
    Andersson, Martin
    KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
    An experimental investigation of spur gear efficiency and temperature: A comparison between ground and superfinished surfaces2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis focuses on reliability when testing gear efficiency and on how gear mesh efficiency can be increased without detrimental effects on the gears. Test equipment commonly used in gear research was analysed to identify important parameters for gear efficiency testing. The effect of the bearing model's load-dependent losses on gear mesh efficiency was also investigated. Two different surface finishes of gears, ground and superfinished, were investigated to determine how two different load levels during running-in affect gear mesh efficiency and changes in surface roughness. Efficiency and gear temperature were also measured for ground and superfinished gears with dip lubrication, as well as two different forms of spray lubrication (before and after gear mesh contact).

    Tests on a gear test rig, showed that different assemblies of the same test setup can yield different measurements of torque loss. The applied bearing model had a significant effect on the estimated gear mesh efficiency. The mesh efficiency of ground gears is affected by the running-in procedure, with a higher running-in load resulting in a higher mesh efficiency than a lower load. This effect was not seen for superfinished gears, which show the same gear mesh efficiency for both running-in loads. Gearbox efficiency increased with spray lubrication rather than dip lubrication. The gear mesh efficiency increased, and thus gear temperatures were reduced, when superfinished gears were used rather than ground gears. A lower gear temperature was measured when gears were spray lubricated at the mesh inlet rather than the mesh outlet.

  • Andersson, Anders
    et al.
    Swedish National Road and Transport Research Institute, Traffic and road users, Körsimulering och visualisering, SIM.
    Andersson Hultgren, Jonas
    Swedish National Road and Transport Research Institute, Traffic and road users, Körsimulering och visualisering, SIM.
    Leandertz, Rickard
    HiQ.
    Johansson, Martin
    Pitch Technologies.
    Steve, Betnér
    Pitch Technologies.
    Jakobson, Ola
    Volvo Car Corporation.
    Rolff, Fredrik
    Volvo Car Corporation.
    SimArch 2: Implementation and demonstration of the SimArch architecture2017Report (Other academic)
    Abstract [en]

    Complexity in modern vehicles consists of an increasingly large multitude of components that operate together. While functional verification of individual components is important, it is also important to test systems of interacting components within a driving environment, both from a functional perspective and from a driver perspective. One proven way for testing is vehicle simulators and in this work the main goals have been to increase flexibility and scalability by introducing a distributed driving simulator platform. 

    A distributed simulation architecture was designed and implemented, based on user needs defined in a previous project, which divides a driving simulator environment into four major entities with well-defined interfaces. These entities are Session Control, Environment Simulator, Driving Simulator and Vehicle simulator. High Level Architecture (HLA) Evolved, an IEEE standard, was chosen as the standard for communication. HLA Evolved is based on a publish-subscribe architecture, and is commonly used for distributed simulations. The entities and the communication topology are described in detail in the report.

    The evaluation of the distributed simulation architecture focused on flexibility and scalability, and on timing performance. Results show that the implemented distributed simulation architecture compared to the non-modified architecture increased flexibility and scalability, as several distributed setups were tested successfully. However, it also has an inherent communication latency due to packaging and sending of data between entities, which was estimated to be one millisecond. This is an effect which needs to be considered for a distributed simulation. Especially if the communication between the Driving Simulator and the Vehicle Simulator is sensitive to such delays. During evaluations of the distributed simulation architecture, the Driving Simulator and the Vehicle Simulator were always located at one site in a low latency configuration.

  • Gårdfeldt, Katarina (Editor)
    Lindgren, Åsa (Editor)
    SWEDARCTIC Arctic Ocean 2016: Expedition Report2017Report (Other academic)