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  • Szreder, Mikael
    Linköping University, Department of Electrical Engineering, Information Coding.
    IoT Security in Practice: A Computer Security Analysis of the IKEA “TRÅDFRI” Platform2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In order to develop secure Internet of Things (IoT) devices, it is vital that security isconsidered throughout the development process. However, this is not enough as vulnerabledevices still making it to the open market. To try and solve this issue, this thesis presentsa structured methodology for performing security analysis of IoT platforms.

    The presented methodology is based on a black box perspective, meaning that theanalysis starts without any prior knowledge of the system. The aim of the presentedmethodology is to obtain information in such a way as to recreate the system design fromthe implementation. In turn, the recreated system design can be used to identify potentialvulnerabilities.

    Firstly the potential attack surfaces are identified, which the methodology calls inter-faces. These interfaces are the point of communication or interaction between two partsof a system. Secondly, since interfaces do not exist in isolation, the surrounding contextsin which these interfaces exist in are identified. Finally the information processed by theseinterfaces and their contexts are analyzed. Once the information processed by the iden-tified interfaces in their respective contexts are analysed, a risk assessment is performedbased on this information.

    The methodology is evaluated by performing an analysis of the IKEA “TRÅDFRI”smart lighting platform. By analysing the firmware update process of the IKEA “TRÅD-FRI” platform it can be concluded that the developers have used standardized protocolsand standardized cryptographic algorithms and use these to protect devices from ma-licious firmware. The analysis does however find some vulnerabilities, even though thedevelopers have actively taken steps to protect the system.

  • Wahlsten, Markus
    et al.
    Linköping University, Department of Mathematics, Computational Mathematics. Linköping University, Faculty of Science & Engineering.
    Nordström, Jan
    Linköping University, Department of Mathematics, Computational Mathematics. Linköping University, Faculty of Science & Engineering.
    Correction: On Stochastic Investigation of Flow Problems Using the Viscous Burgers’ Equation as an Example (vol 81, p 1111, 2019)2019In: Journal of Scientific Computing, ISSN 0885-7474, E-ISSN 1573-7691, Vol. 81, no 2, p. 1118-1118Article in journal (Other academic)
  • Wahlsten, Markus
    et al.
    Linköping University, Department of Mathematics, Computational Mathematics. Linköping University, Faculty of Science & Engineering.
    Nordström, Jan
    Linköping University, Department of Mathematics, Computational Mathematics. Linköping University, Faculty of Science & Engineering.
    On Stochastic Investigation of Flow Problems Using the Viscous Burgers’ Equation as an Example2019In: Journal of Scientific Computing, ISSN 0885-7474, E-ISSN 1573-7691, Vol. 81, no 2, p. 1111-1117Article in journal (Refereed)
    Abstract [en]

    We consider a stochastic analysis of non-linear viscous fluid flow problems with smooth and sharp gradients in stochastic space. As a representative example we consider the viscous Burgers’ equation and compare two typical intrusive and non-intrusive uncertainty quantification methods. The specific intrusive approach uses a combination of polynomial chaos and stochastic Galerkin projection. The specific non-intrusive method uses numerical integration by combining quadrature rules and the probability density functions of the prescribed uncertainties. The two methods are compared in terms of error in the estimated variance, computational efficiency and accuracy. This comparison, although not general, provide insight into uncertainty quantification of problems with a combination of sharp and smooth variations in stochastic space. It suggests that combining intrusive and non-intrusive methods could be advantageous.

  • Svensson, Petra
    et al.
    Linköping University, Department for Studies of Social Change and Culture, Centre for Municipality Studies – CKS. Linköping University, Faculty of Arts and Sciences.
    Syssner, Josefina
    Linköping University, Department for Studies of Social Change and Culture, Centre for Municipality Studies – CKS. Linköping University, Faculty of Arts and Sciences.
    Den platsskapande strategen: ett aktörsperspektiv på hur turistiska platser blir till2019In: Turismen och resandets utmaningar / [ed] Sandra Wall-Reinius och Susanna Heldt Cassel, Svenska Sällskapet för Antropologi och Geografi , 2019, p. 31-52Chapter in book (Other academic)
    Abstract [sv]

    Detta kapitel diskuterar hur platser har olika organisatoriska och idémässiga förutsättningar för att arbeta med destinationsutveckling, och att det har betydelse för hur de strateger som arbetar med frågan tar sig an sitt platsskapande, destinationsstrategiska uppdrag. Detta tillsammans skapar variation både i vad som är möjligt och vad som anses som önskvärt i det destinationsutvecklande arbetet. I kapitlet diskuteras fyra idealtypiska förhållningssätt för hur destinationsstrategiskt arbete kan gå till när det länkas till platsens tidigare historia: hur det kan se ut när regionen präglas av värden som pragmatisk problemlösning, hur det kan se ut när regionen präglas av andra frågor än turism, hur det kan se ut när regionen är engagerad men inte har så mycket erfarenhet av turism, och hur det kan se ut när regionen har stor erfarenhet och tradition av att arbeta med turism. 

  • Bergström, David
    Linköping University, Department of Computer and Information Science, Artificial Intelligence and Integrated Computer Systems.
    Bayesian optimization for selecting training and validation data for supervised machine learning: using Gaussian processes both to learn the relationship between sets of training data and model performance, and to estimate model performance over the entire problem domain2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Validation and verification in machine learning is an open problem which becomes increasingly important as its applications becomes more critical. Amongst the applications are autonomous vehicles and medical diagnostics. These systems all needs to be validated before being put into use or else the consequences might be fatal.

    This master’s thesis focuses on improving both learning and validating machine learning models in cases where data can either be generated or collected based on a chosen position. This can for example be taking and labeling photos at the position or running some simulation which generates data from the chosen positions.

    The approach is twofold. The first part concerns modeling the relationship between any fixed-size set of positions and some real valued performance measure. The second part involves calculating such a performance measure by estimating the performance over a region of positions.

    The result is two different algorithms, both variations of Bayesian optimization. The first algorithm models the relationship between a set of points and some performance measure while also optimizing the function and thus finding the set of points which yields the highest performance. The second algorithm uses Bayesian optimization to approximate the integral of performance over the region of interest. The resulting algorithms are validated in two different simulated environments.

    The resulting algorithms are applicable not only to machine learning but can also be used to optimize any function which takes a set of positions and returns a value, but are more suitable when the function is expensive to evaluate.

  • Reuterswärd, Caspar
    Linköping University, Department of Science and Technology.
    Exploring the repurposing of cross laminated timber spillage2019Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
    Abstract [en]

    Forestry is one of Sweden’s largest natural resources and a largeand important foundation for the country’s economic stability.There is a significant opportunity to evaluate material efficiencyand values in the supply chain of industrialised wood-basedproducts. This thesis comprises on handling a spill-product of amodern wood-based building material: cross-laminated timber(CLT). With the aim to increase value of this spill product throughpractical design iteration, material exploration and theoreticalanalysis. The material exploration leads to a collection of furnitureand interior products which are evaluated based on commercialinterest and production feasibility.

  • van Jarwaarde, Menno
    Linköping University, Department of Science and Technology.
    Designing a closing experience for a Lost and Found service2019Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
    Abstract [en]

    The current Lost and Found service Finderoo does not provide a proper closing experience. Research has shown that the closing experience is one of the salient items of an experience to be memorised. Other factors include the peak of the experience and chronology. Those moments have an influence on the memorability, which a person later uses to evaluate the experience. This study aims to determine how a closing experience for a Lost and Found service might be designed. The closing experience in this research is defined as the last part of the main service (where the service purpose happens); before the post-service moment in which users evaluate on their experiences.

    The current Lost and Found service and competitors were reviewed. A theoretical review of experiences, closing experiences, memorability, evaluation, gratitude and reciprocity showed a lack of research on closing experiences within (service) design. This knowledge gap has been addressed through the use of a Research Through Design method. Based on a pre-study of the current Finderoo service and a brainstorm, a concept was created and visualised. A test of the prototype which included enactment was then done with 14 participants. The final concept included a reciprocal act in which the owner can thank the finder for his effort by sending a personal message and gift. The results indicate that the new closing experience is perceived as positive, and leaves most participants in a more positive state than without this service extension. Further research is recommended regarding closing experiences in (service) design, as it has a substantial impact on the perceived experience.

  • Stolpe, Karin
    et al.
    Linköping University, Department of Social and Welfare Studies, Learning, Aesthetics, Natural science. Linköping University, Faculty of Educational Sciences.
    Höst, Gunnar
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Kemi för alla - Bidrag från konferensen i Stockholm 1-2 oktober 2018, arrangerad av KRC2019Report (Other academic)
    Abstract [sv]

    Sedan 2010 anger skollagen att all utbildning ska vila på vetenskaplig grund och beprövad erfarenhet. För att detta ska ske behöver forskare och verksamma lärare kommunicera på flera olika sätt. Konferensen ”Kemi för alla” och denna skrift är ett bidrag till denna kommunikation.

    Under år 2017 kontaktade NATDID Kemilärarnas resurscentrum (KRC) och undrade om det fanns intresse för att tillsammans producera en skrift med fokus på kemididaktik. Tidigare hade ett samarbete mellan NATDID och Nationellt resurscentrum för fysik (NRCF) lett fram till en skriftsamling.

    Idén om att göra något liknande, men med fokus på kemi, ledde fram till att konferensen ”Kemi för alla” arrangerades 1–2 oktober 2018 av KRC och NATDID i samverkan med Institutionen för matematikämnets och naturvetenskapsämnenas didaktik (MND) vid Stockholms universitet. Målet med konferensen var att skapa en mötesplats kring kemiundervisning mellan verksamma lärare och forskare i kemi-/NV-didaktik, samt att producera en skrift som kan ge stöd till lärare som vill forskningsbasera sin undervisning i kemi.

    Under konferensen hölls åtta föreläsningar med olika kemididaktiska infallsvinklar. Den här skriften innehåller artiklar som utgår från sex av föreläsningarna. Dessa handlar om alltifrån kemisk bindning, språkutvecklande kemiundervisning, vardagsanknuten och relevant kemiundervisning till mer abstrakta begrepp som kemins karaktär och didaktisk modellering av kemi. Dessutom hölls två föredrag om animeringar respektive virtual reality i kemiundervisningen.

    I anslutning till varje föreläsning genomfördes workshops med ambitionen att ta tillvara konferensdeltagarnas undervisningsidéer. Resultaten skrevs ned av i förväg utsedda ”sekreterare” och delar av dessa anteckningar har författarna till denna skrift använt i sina artiklar.

    De möten och samtal mellan forskning och skolans praktik som sker bland annat på konferenser som ”Kemi för alla” är viktiga för skolans utveckling på vetenskaplig grund. Vi tror på vikten av att långsiktigt bygga relationer mellan skolan och forskningen och hoppas kunna genomföra ytterligare en ”Kemi för alla” hösten 2020. Denna konferensbok syftar till att sprida de erfarenheter som presenterades vid konferensen i Stockholm till fler än de som var närvarande.

  • Pilemalm, Robert
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Simak, Sergei I
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Eklund, Per
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    The Effect of Point Defects on the Electronic Density of States of ScMN2-Type (M = V, Nb, Ta) Phases2019In: Condensed Matter, ISSN 2410-3896, Vol. 4, no 3, article id 70Article in journal (Refereed)
    Abstract [en]

    ScMN2-type (M = V, Nb, Ta) phases are layered materials that have been experimentally reported for M = Ta and Nb. They are narrow-bandgap semiconductors with potentially interesting thermoelectric properties. Point defects such as dopants and vacancies largely affect these properties, motivating the need to investigate these effects. In particular, asymmetric peak features in the density of states (DOS) close to the highest occupied state is expected to increase the Seebeck coefficient. Here, we used first principles calculations to study the effects of one vacancy or one C, O, or F dopant on the DOS of the ScMN2 phases. We used density functional theory to calculate formation energy and the density of states when a point defect is introduced in the structures. In the DOS, asymmetric peak features close to the highest occupied state were found as a result of having a vacancy in all three phases. Furthermore, one C dopant in ScTaN2, ScNbN2, and ScVN2 implies a shift of the highest occupied state into the valence band, while one O or F dopant causes a shift of the highest occupied state into the conduction band.

  • Public defence: 2019-11-22 09:15 Planck, Physics building, LinköpingLindholm, Caroline
    Intermittent fasting in chickens: Physiological mechanisms and welfare implications for broiler breeders2019Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Broiler breeder chickens are the parent stock used to produce broiler chickens raised for human consumption and have long been caught in a welfare dilemma. The immensely successful selection of fast-growing meat-type chickens over the last 80 years has created a remarkably efficient meat-producer and given us access to cheap chicken meat but has also created health problems for the animals. These problems especially affect the breeder generation, which must be raised with strict feed restriction to limit weight gain and thus maintain physical health and normal fertility. At the same time, however, feed restriction causes chronic hunger and feeding frustration with reduced animal welfare as a result. In the EU alone 60 million breeders are affected annually and although the problem is well-known within the industry, there is financial incentive to keep selecting for even higher growth potential in broilers, further increasing the problems for broiler breeders.

    Many strategies for reducing the impact of growth restriction on breeder welfare have been suggested and are usually aimed at somehow increasing the amount of feed given at feeding times. This can be done either through adding bulky fibers to the diet or by reducing feeding frequency. In this thesis, focus is on the latter as we explore the effects of intermittent fasting (IF) on the welfare of young broiler breeders as well as wild-type Red Junglefowl. Intermittent fasting, or “skip-a-day” feeding, is supposedly the most common feeding strategy for broiler breeders worldwide but is perceived as welfare-reducing and thus illegal in Sweden and several other European countries. In spite of this, the scientific knowledge of how this type of feeding affects chicken welfare is scarce.

    Assessing the overall effect of IF on breeder welfare is complicated by large variations in both physiological and behavioral parameters between feeding and fasting days, but it does appear that chicken welfare is improved at least on the feeding days of IF regimens. It also seems that some of the health benefits reported from mammalian studies of IF may apply to chickens as well, although behavioral indicators still point to welfare issues unless the level of feed restriction can be relaxed. In comparison with daily feed restriction, IF appears to increase the motivation for feed consumption but to reduce the motivation for appetitive behaviors such as foraging, which may explain why birds fed on this type of schedule are often reported as calmer.

    List of papers
    1. Slow and steady wins the race? No signs of reduced welfare in smallerbroiler breeder hens at four weeks of age
    Open this publication in new window or tab >>Slow and steady wins the race? No signs of reduced welfare in smallerbroiler breeder hens at four weeks of age
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    2015 (English)In: Animal Welfare, ISSN 0962-7286, Vol. 24, no 4, p. 447-454Article in journal (Refereed) Published
    Abstract [en]

    Broiler breeder chickens are commonly reared under strict feed-restriction regimes to reduce obesity-induced health and fertilityproblems during adult life, and are assumed to experience a reduced welfare due to the resulting hunger. In these conditions, feedcompetition could influence the growth rate, so that the individuals falling behind in growth would experience more stress and hunger.We hypothesised that these chickens are poor competitors due to a reactive coping style and experience a further reduced welfaresituation before size-sorting (‘grading’) at four weeks of age. Our results from open field, tonic immobility and home pen activity monitoringshow signs of lower fear and higher home-pen activity levels in smaller hens and do not support the idea of reactive coping.H/L ratios of smaller hens were also found to be lower, indicating less stress in these birds. Dissections of smaller and larger fourweekbreeder hens may offer an explanation in the form of a relatively larger gastrointestinal tract in smaller birds. We argue thatthis is a form of habituation to restricted feeding, offering these birds a physiological stress coping mechanism, and that low earlygrowth rate may not always be a sign of poorer welfare in broiler breeders.

    Place, publisher, year, edition, pages
    Universities Federation for Animal Welfare, 2015
    Keywords
    animal welfare, broiler breeders, chicken, feed restriction, growth, stress
    National Category
    Zoology
    Identifiers
    urn:nbn:se:liu:diva-122024 (URN)10.7120/09627286.24.4.447 (DOI)000363898500009 ()
    Note

    Funding agencies: Swedish research council Formas [2013-293]

    Available from: 2015-10-16 Created: 2015-10-16 Last updated: 2019-10-10
    2. Growth heterogeneity in broiler breeder pullets is settled before the onset of feed restriction but is not predicted by size at hatch
    Open this publication in new window or tab >>Growth heterogeneity in broiler breeder pullets is settled before the onset of feed restriction but is not predicted by size at hatch
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    2017 (English)In: Journal of Animal Science, ISSN 0021-8812, E-ISSN 1525-3163, Vol. 95, no 1, p. 182-193, article id 2017.95Article in journal (Refereed) Published
    Abstract [en]

    Uniform growth is a desirable trait in  all large-scale animal production systems because it  simplifies animal management and increases profitability.  In parental broiler flocks, so-called broiler  breeders, low growth uniformity is largely attributed  to the feed competition that arises from quantitatively  restricted feeding. As feed restriction is crucial to  maintaining healthy and fertile breeders, several practices  for reducing feed competition and the associated  growth heterogeneity have been suggested and range  from nutrient dilution by increasing fiber content in  feed to intermittent fasting with increased portion size  (“skip a day”), but no practice appears to be entirely  effective. The fact that a large part of the heterogeneity  remains even when feed competition is minimized  suggests that some growth variation is caused by other  factors. We investigated whether this variation arises  during embryonic development (as measured by size at  hatch) or during posthatch development by following  the growth and body composition of birds of varying  hatch sizes. Our results support the posthatch alternative,  with animals that later grow to be small or large  (here defined as >1 SD lighter or heavier than mean  BW of the flock) being significantly different in size as  early as 1 d after gaining access to feed (P < 0.05). We  then investigated 2 possible causes for different postnatal  growth: that high growth performance is linked 1) to  interindividual variations in metabolism (as measured  by cloacal temperature and verified by respirometry)  or 2) to higher levels of social motivation (as measured  in a social reinstatement T-maze), which should reduce  the stress of being reared in large-scale commercial  flocks. Neither of these follow-up hypotheses could  account for the observed heterogeneity in growth. We  suggest that the basis of growth heterogeneity in broiler  breeder pullets may already be determined at the time  of hatch in the form of qualitatively different maternal  investments or immediately thereafter as an indirect  result of differences in incubation conditions, hatching  time, and resulting fasting time. Although this potential  difference in maternal investment is not seen in body  mass, tarsometatarsal length, or full body length of  day-old chicks arriving at the farm, it may influence  the development of differential feed and water intake  during the first day of feeding, which in turn has direct  effects on growth heterogeneity.

    Place, publisher, year, edition, pages
    Champaign, IL, United States: American Society of Animal Science, 2017
    Keywords
    broiler breeders, feed restriction
    National Category
    Ecology
    Identifiers
    urn:nbn:se:liu:diva-133189 (URN)10.2527/jas.2016.0929 (DOI)000397115100019 ()28177396 (PubMedID)
    Available from: 2016-12-13 Created: 2016-12-13 Last updated: 2019-10-10Bibliographically approved
    3. The physiological and neuroendocrine correlates of hunger in the Red Junglefowl (Gallus gallus)
    Open this publication in new window or tab >>The physiological and neuroendocrine correlates of hunger in the Red Junglefowl (Gallus gallus)
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    2017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, article id 17984Article in journal (Refereed) Published
    Abstract [en]

    The ability to regulate food intake is critical to survival. The hypothalamus is central to this regulation, integrating peripheral signals of energy availability. Although our understanding of hunger in rodents is advanced, an equivalent understanding in birds is lacking. In particular, the relationship between peripheral energy indices and hypothalamic hunger peptides, agouti-related protein (AgRP), proopiomelanocortin (POMC) and neuropeptide Y (NPY) is poorly understood. Here, we compare AgRP, POMC and NPY RNA levels in the hypothalamus of Red Junglefowl chicks raised under ad libitum, chronic restriction and intermittent feeding regimens. Hypothalamic gene expression differed between chronically and intermittently restricted birds, confirming that different restriction regimens elicit different patterns of hunger. By assessing the relationship between hypothalamic gene expression and carcass traits, we show for the first time in birds that AgRP and POMC are responsive to fat-related measures and therefore represent long-term energy status. Chronically restricted birds, having lower indices of fat, show elevated hunger according to AgRP and POMC. NPY was elevated in intermittently fasted birds during fasting, suggesting a role as a short-term index of hunger. The different physiological and neuroendocrine responses to quantitative versus temporal feed restriction provide novel insights into the divergent roles of avian hunger neuropeptides.

    Place, publisher, year, edition, pages
    NATURE PUBLISHING GROUP, 2017
    National Category
    Other Biological Topics
    Identifiers
    urn:nbn:se:liu:diva-144265 (URN)10.1038/s41598-017-17922-w (DOI)000418562100024 ()29269733 (PubMedID)
    Note

    Funding Agencies|Swedish research council Formas [2013-293]; Swedish Centre of Excellence in Animal Welfare Science; Carl Tryggers Stiftelse for Vetenskaplig Forskning

    Available from: 2018-01-12 Created: 2018-01-12 Last updated: 2019-10-10
    4. Measuring ketones in the field: rapid and reliable measures of beta-hydroxybutyrate in birds
    Open this publication in new window or tab >>Measuring ketones in the field: rapid and reliable measures of beta-hydroxybutyrate in birds
    2019 (English)In: Ibis, ISSN 0019-1019, E-ISSN 1474-919X, Vol. 161, no 1, p. 205-210Article in journal (Refereed) Published
    Abstract [en]

    Ketone bodies such as beta-hydroxybutyrate are important indicators of metabolic condition in birds and are linked to a suite of ecologically relevant factors including migratory decision-making, hunger level and ectoparasite load. Portable point-of-care (POC) devices designed to measure ketones in humans offer a cheap and easy solution to field physiologists in comparison with previous laboratory methods; however, their accuracy for use in birds has received scant attention. Here, we assessed the accuracy of a POC ketone meter (FreeStyle Precision Neo, Abbott, IL, USA) using samples from intermittently fed Red Junglefowl Gallus gallus. Although the device overestimated ketone levels in comparison with laboratory-derived values, random error was low and laboratory vs. device values correlated well, indicating that the Precision Neo is of sufficient accuracy for use in the field and is a pragmatic choice for avian physiologists.

    Place, publisher, year, edition, pages
    WILEY, 2019
    Keywords
    intermittent feeding; ketosis; point-of-care; Red Junglefowl
    National Category
    Ecology
    Identifiers
    urn:nbn:se:liu:diva-153969 (URN)10.1111/ibi.12643 (DOI)000454604400018 ()
    Note

    Funding Agencies|Swedish research council Formas [2013-293]; Swedish Centre of Excellence in Animal Welfare Science; Carl Tryggers Stiftelse for Vetenskaplig Forsknin

    Available from: 2019-01-22 Created: 2019-01-22 Last updated: 2019-10-10
    5. The Quest for Welfare-Friendly Feeding of Broiler Breeders: Effects of Daily vs. 5:2 Feed Restriction Schedules
    Open this publication in new window or tab >>The Quest for Welfare-Friendly Feeding of Broiler Breeders: Effects of Daily vs. 5:2 Feed Restriction Schedules
    Show others...
    2018 (English)In: Poultry Science, ISSN 0032-5791, E-ISSN 1525-3171, Vol. 97, no 2, p. 368-377Article in journal (Refereed) Published
    Abstract [en]

    Restricted feeding of broiler breeders is required for improved long-term health and welfare. Because feeding frustration and hunger are major welfare concerns during rearing, many suggestions have been made to decrease the negative feelings of hunger while maintaining suitable growth rates and reproductive health. Non-daily ("skip-a-day") feeding schedules are commonly used around the world to increase portion sizes at meal times while restricting intake but these practices are prohibited in many countries due to welfare concerns on fasting days. We compared birds raised on a non-daily feeding schedule (2 non-consecutive fasting days per week, 5:2), previously suggested as a welfare-friendlier non-daily alternative, to birds raised on daily feed restriction. We found signs of increased physiological stress levels in 5:2 birds, including elevated heterophil to lymphocyte ratios (1.00 for 5:2 vs. 0.75 for daily fed at 12 weeks of age), increased adiposity (0.21% lean body weight [LBW] for 5:2 vs. 0.13% LBW for daily fed), and reduced muscle growth (pectoral muscle 5.94% LBW for 5: 2 vs. 6.52% LBW for daily fed). At the same time, 5:2 birds showed signs of lower anxiety before feeding times (activity was reduced from 10.30 in daily fed to 4.85) which may be a result of the lower feed competition associated with larger portion sizes. Although we found no difference in latency to first head movement in tonic immobility between the treatments (136.5 s on average for both groups), 5:2 birds generally showed more interest in a novel object in the home pen which indicated increased risk taking and reduced fear while fasting. The 5:2 birds in this study showed no signs of learning the feeding schedule, and this unpredictability may also increase stress. Taken together, the effects of 5:2 vs. daily feed restriction on the welfare of broiler breeder pullets remain inconclusive and differ between feeding and fasting days. In addition to reducing stress by minimizing the number of fasting days, we suggest that a shift to more predictable schedules may help improve the welfare of broiler breeder pullets.

    Place, publisher, year, edition, pages
    OXFORD UNIV PRESS, 2018
    Keywords
    animal welfare; broiler breeders; feed restriction; intermittent fasting; skip-a-day
    National Category
    Zoology
    Identifiers
    urn:nbn:se:liu:diva-145242 (URN)10.3382/ps/pex326 (DOI)000424248600003 ()29182752 (PubMedID)
    Note

    Funding Agencies|Swedish research council Formas [2013-293]; Swedish Centre of Excellence in Animal Welfare Science

    Available from: 2018-02-21 Created: 2018-02-21 Last updated: 2019-10-10
  • Karlsson, Karin
    et al.
    Linköping University, Department of Social and Welfare Studies, Social Work.
    Rimvid, Evelina
    Linköping University, Department of Social and Welfare Studies, Social Work.
    "Föräldraskapet har fått sig en törn": En netnografisk studie av hur föräldrar hanterar att deras barn aktualiseras på socialtjänsten efter en orosanmälan2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med denna kvalitativa netnografiska studie är att få en ökad förståelse för hur föräldrar hanterar att motta en orosanmälan gällande deras barn utifrån den stigmatisering som kan uppstå vid en aktualisering hos socialtjänsten och det ifrågasättande av föräldrarollen som en orosanmälan innebär. Detta för att socialsekreterare ska kunna hantera de spänningar som uppstår mellan socialtjänsten, föräldrarna och den som anmält samt upprätthålla relationen dem emellan. Studien har genomförts med en tematisk innehållsanalys av datamaterial insamlat ur 15 forumtrådar från föräldraforumet familjeliv.se. Denna studie har sin utgångspunkt i socialkonstruktivismen med en ontologisk inriktning mot idealismen och har genom Goffmans rollteori analyserat föräldrarollen för att få en djupare förståelse för de sätt en förälder hanterar en orosanmälan.

    Vi har i vårt resultat kunnat se ett mönster i hur ämnet orosanmälningar diskuteras på forumet och presenterar det genom fyra teman; försvara föräldraskapet, fokusera på anmälaren, fokusera på socialtjänsten samt skydda sig mot framtida anmälningar. Genom Goffmans teorier har vi kunnat se att föräldrarnas sätt att hantera orosanmälningar är kopplade till deras föräldraskap och hur föräldrarna på olika sätt försvarar föräldrarollen inför andra. Studien visar att föräldrar försvarar sin föräldraroll bland annat genom att visa på att anledningen till att de mottagit en orosanmälan inte handlar om brister i föräldraskapet utan om ett missförstånd eller olycka. Resultatet visar också på att många föräldrar lägger fokus på den som anmält oron för deras barn eller att de fokuserar på socialtjänstens arbete, genom att visa på brister eller problem hos anmälaren eller hos socialsekreterarna. I det sista temat har vi även kunnat se att föräldrar som mottagit en orosanmälan kan hantera detta genom att skydda sig mot att behöva gå igenom processen igen, bland annat genom att undvika att söka stöd hos professionella med anmälningsskyldighet. Resultatet visar också på att de i diskussionerna skapas verklighetskonstruktioner som får konsekvenser i form av att individer avstår att anmäla oro för ett barn. Studien bidrar med en inblick i föräldrarnas egna diskussioner med varandra där upplevelser och åsikter uttrycks. Detta gör att vår studie bidrar med en ny kunskap från ett perspektiv på orosanmälningar som vi kan se inte har getts något större utrymme i tidigare forskning.

  • Andersson, Per
    et al.
    Linköping University, Department of Behavioural Sciences and Learning, Education and Adult Learning. Linköping University, Faculty of Educational Sciences.
    Köpsén, Susanne
    Linköping University, Department of Behavioural Sciences and Learning, Education and Adult Learning. Linköping University, Faculty of Arts and Sciences.
    VET teachers between school and working life: boundary processes enabling continuing professional development2019In: Journal of Education and Work, ISSN 1363-9080, E-ISSN 1469-9435, p. 1-15Article in journal (Refereed)
    Abstract [en]

    Changes in working life require development in vocational education and training (VET) to retain industrial currency. VET teachers are key actors in VET, and their continuing professional development (CPD) in vocational subjects is central to the currency of VET. This study is situated in Sweden, with a mainly school-based VET system where VET teachers have the main responsibility for students’ school-based and workplace learning, and they typically have a background in an initial occupation which they now teach their students. The study applies a situated learning perspective, with a particular focus on boundary processes between VET schools and working life, and how the modes of identification of engagement, imagination, and alignment are enacted and influence the identity formation and CPD of VET teachers. The findings are based on interviews with 30 Swedish VET teachers. The qualitative study shows how different forms of boundary encounter between VET teachers and working life, brokering of occupational knowledge, and reconstruction of occupational practices at schools provide opportunities for teachers’ CPD and influencing vocational teaching. It is important for the quality of VET teachers’ CPD to include and integrate the different modes of identification, to allow for updating of different aspects of the occupational identity.

  • Rindebratt, Sally
    et al.
    Linköping University, Department of Social and Welfare Studies, Social Work.
    Basovic, Armina
    Linköping University, Department of Social and Welfare Studies, Social Work.
    Vem ringer jag när jag inte vill leva längre?: En narrativ analys av det sociala umgängets relevans för kampen mot psykisk ohälsa2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Att bemöta psykisk ohälsa i människobehandlande organisationer är vanligt förekommande. För den professionella är det viktigt att ha en förståelse för vilka möjligheter och begränsningar som individen står inför. Detta för att kunna erbjuda ett gott bemötande och göra en rättvis bedömning. Oförståelse om psykisk ohälsa leder till felaktiga bedömningar och en ökning i stigmatisering. Syftet med denna studie är att undersöka ur ett narrativt perspektiv hur individer med psykisk ohälsa subjektivt beskriver den sociala omgivningens relevans i deras kamp mot psykisk ohälsa genom att granska fem självbiografier. Detta görs med en vetenskapsteoretisk utgångspunkt i socialkonstruktionismen. Empirin belyses med en Interaktionistisk teori om jaget, dramaturgiskt perspektiv och begreppet stigmatisering. Resultatet redovisas med hjälp av citat ur självbiografierna och analyseras under fem teman; ensamhet, att dela med sig av sin sjukdom, självbild, dåligt bemötande samt skam och skuld.

    Resultatet visar att berättarna upplever ett stöd av sin sociala omgivning när de blir bemötta med förståelse, stöttning och uppmuntran på rätt villkor. Vissa av berättarna upplevde att uppskattning gav dem en bättre självkänsla medan andra mådde sämre av beröm. Vidare visar resultatet att ett behov av stöd endast beskrivs under kristillfällen och när berättaren inte upplever att de har någon att kontakta. Berättarna beskriver övergripande negativa självbilder till följd av stigmatisering och dåligt bemötande utifrån deras sjukdom vilket också orsakar svårigheter i att tala om sitt tillstånd. I narrativen framställs de närmsta relationerna som källor till känslan av ensamhet och stöd. Den allmänna omgivningen framställs i relation till rädsla för stigmatisering och dåligt bemötande. Narrativen är konstruerade på ett sätt där berättaren framställs som både överlevare, offer, hjälte och bov vilket vidare visar på en komplexitet med psykisk ohälsa. Vi anser att detta resultat visar på hur psykisk ohälsa och dess möjligheter och begränsningar är högst individuellt och innebär olika svårigheter för olika individer. Som professionell behövs en bättre kunskap för att kunna bemöta individen där han eller hon är nu och arbeta med empowerment. En bättre kunskap hos professionella kan hjälpa att minska stigmatiseringen av psykisk ohälsa.

  • Public defence: 2019-11-07 10:15 Nobel BL32, Linköping
    Ghersheen, Samia
    Linköping University, Department of Mathematics, Mathematics and Applied Mathematics. Linköping University, Faculty of Science & Engineering.
    Dynamics of Coinfection: Complexity and Implications2019Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Living beings are always on risk from multiple infectious agents in individual or in groups. Though multiple pathogens' interactions have widely been studied in epidemiology. Despite being well known, the co-existence of these pathogens and their coinfection remained a mystery to be uncovered. Coinfection is one of the important and interesting phenomenon in multiple interactions when two infectious agents coexist at a time in a host. The aim of this thesis is to understand the complete dynamics of coinfection and the role of different factors affecting these interactions.

    Mathematical modelling is one of the tools to study the coinfection dynamics. Each model has its own limitations and choice of the model depends on the questions to be addressed. There is always a crosstalk between the choice of model and limitation of their solvability. The complexity of the problem defines the restriction in analytical possibilities.

    In this thesis we formulate and analyse the mathematical models of coinfection with different level of complexities. Since viral infections are a major class of infectious diseases, in the first three papers we formulated a susceptible, infected, recovered (SIR) model for coinfection of the two viral strains in a single host population introducing carrying capacity as limited growth factor in susceptible class. In the first study, we made some assumptions for the transmission of coinfection in the model. In the following papers, the analysis is expanded by relaxing these assumptions which has generated the complexity in dynamics. We showed that the dynamics of stable equilibrium points depends on the fundamental parameters including carrying capacity K. A parameter dependent transition dynamics exists starting from disease free state to a level where coinfection can persists only with susceptible class. A disease-free equilibrium point is stable only when K is small. With increase in carrying capacity to a level where only single infection can invade and persists. Further increase in carrying capacity becomes large enough for the existence and persistence of coinfection due to the high density of susceptible class. In paper I, we proved the existence of a globally stable equilibrium point for any set of parameter values, revealing persistence of disease in a population. This shows a close relationship between the intensity of infection and carrying capacity as a crucial parameter of the population. So there is always a positive correlation between risk of infection and carrying capacity which leads to destabilization of the population.

    In paper IV, we formulated mathematical models using different assumptions and multiple level of complexities to capture the effect of additional phenomena such as partial cross immunity, density dependence in each class and a role of recovered population in the dynamics. We found the basic reproduction number for each model which is the threshold that describes the invasion of disease in population. The basic reproduction number in each model shows that the persistence of disease or strains depends on the carrying capacity K. In the first model of this paper, we have also shown the local stability analysis of the boundary equilibrium points and showed that the recovered population is not uniformly bounded with respect to K.

    Paper V uses simulations to analyse the dynamics and specifically studies how temporal variation in the carrying capacity of the population affects its dynamics. The degree of autocorrelation in variability of carrying capacity influences whether the different classes exhibit temporal variation or not. The fact that the different classes respond differently to the variation depends in itself on whether their equilibrium densities show a dependence on the carrying capacity or not. An important result is that at high autocorrelation, the healthy part of the population is not affected by the external variation and at the same time the infected part of the population exhibits high variation. A transition to lower autocorrelation, more randomness, means that the healthy population varies over time and the size of the infected population decreases in variation.

    List of papers
    1. Dynamical behaviour of SIR model with coinfection: The case of finite carrying capacity
    Open this publication in new window or tab >>Dynamical behaviour of SIR model with coinfection: The case of finite carrying capacity
    2019 (English)In: Mathematical methods in the applied sciences, ISSN 0170-4214, E-ISSN 1099-1476, Vol. 42, p. 1-22Article in journal (Refereed) Published
    Abstract [en]

    Multiple viruses are widely studied because of their negative effect on the health of host as well as on whole population. The dynamics of coinfection are important in this case. We formulated an susceptible infected recovered (SIR) model that describes the coinfection of the two viral strains in a single host population with an addition of limited growth of susceptible in terms of carrying capacity. The model describes five classes of a population: susceptible, infected by first virus, infected by second virus, infected by both viruses, and completely immune class. We proved that for any set of parameter values, there exists a globally stable equilibrium point. This guarantees that the disease always persists in the population with a deeper connection between the intensity of infection and carrying capacity of population. Increase in resources in terms of carrying capacity promotes the risk of infection, which may lead to destabilization of the population.

    Place, publisher, year, edition, pages
    John Wiley & Sons, 2019
    Keywords
    carrying capacity, coinfection, global stability, linear complementarity problem, SIR model
    National Category
    Mathematical Analysis
    Identifiers
    urn:nbn:se:liu:diva-160293 (URN)10.1002/mma.5671 (DOI)2-s2.0-85066086382 (Scopus ID)
    Available from: 2019-09-17 Created: 2019-09-17 Last updated: 2019-10-16Bibliographically approved
    2. Mathematical analysis of complex SIR model with coinfection and density dependence
    Open this publication in new window or tab >>Mathematical analysis of complex SIR model with coinfection and density dependence
    2019 (English)In: Computational and Mathematical Methods, ISSN 2577-7408, Vol. 1, no 4Article in journal (Refereed) Published
    Abstract [en]

    An SIR model with the coinfection of the two infectious agents in a single host population is considered. The model includes the environmental carry capacity in each class of population. A special case of this model is analyzed, and several threshold conditions are obtained, which describes the establishment of diseases in the population. We prove that, for small carrying capacity K, there exists a globally stable disease-free equilibrium point. Furthermore, we establish the continuity of the transition dynamics of the stable equilibrium point, that is, we prove that, (1) for small values of K, there exists a unique globally stable equilibrium point, and (b) it moves continuously as K is growing (while its face type may change). This indicates that the carrying capacity is the crucial parameter and an increase in resources in terms of carrying capacity promotes the risk of infection.

    Place, publisher, year, edition, pages
    Wiley-Blackwell Publishing Inc., 2019
    Keywords
    carrying capacity, coinfection, global stability, SIR model
    National Category
    Mathematics Immunology
    Identifiers
    urn:nbn:se:liu:diva-160284 (URN)10.1002/cmm4.1042 (DOI)
    Conference
    2019/09/17
    Available from: 2019-09-17 Created: 2019-09-17 Last updated: 2019-10-16Bibliographically approved
  • Isabelle, Sandborg
    Linköping University, Department of Social and Welfare Studies.
    Det gränslösa murbyggandet: En studie i politisk teori om den liberala paradoxen imurens politik2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Det gränslösa murbyggandet är en studie i politisk teori om den liberala paradoxen i murens politik, det vill säga; hur vi i denna globala värld å ena sidan har idealet om öppna gränser och hög rörelsefrihet, å andra sidan bygger vi fler murar och fortifierar gränser mer än någonsin. Med avstamp i sex olika studier av forskare inom området politisk teori diskuteras vilket arbete muren utför – politiskt, ekonomiskt och ideologiskt, hur dessa paradoxer uppstår, vad som föreslås vara vägen framåt och hur teorierna om muren skiljer sig åt. Analysen är indelad efter de tre paradoxerna som går att utläsa ur den så kallade ’överordnade’ liberala paradoxen. De tre paradoxerna berör ekonomi, suveränitet och säkerhet, och effektivitet. Avslutningsvis sammanfattas kärnan i de tre paradoxerna men det diskuteras även huruvida rädslan för ’den andre’ kan hjälpa till att lösa upp paradoxerna. Vid närmare anblick är de identifierbara paradoxerna i vår samtid inte så paradoxala trots allt

  • Stolpe, Karin
    et al.
    Linköping University, Department of Social and Welfare Studies, Learning, Aesthetics, Natural science. Linköping University, Faculty of Educational Sciences.
    Höst, GunnarLinköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.Larsson, AndreasLinköping University, Department of Social and Welfare Studies, Learning, Aesthetics, Natural science. Linköping University, Faculty of Educational Sciences.
    Från forskning till fysikundervisning: Bidrag från konferensen 10– 11 april 2018 i Lund arrangerad av Nationellt Resurscentrum för Fysik2019Conference proceedings (editor) (Other academic)
    Abstract [sv]

    Konferensen ”Från forskning till fysikundervisning” har som syfte att låta lärare möta forskning som på olika sätt kan påverka undervisningen. Det kan både handla om fysikdidaktisk forskning och exempel på hur aktuell forskning inom fysik kan komma in i undervisningen. Det senare nämns exempelvis i högstadiets kursplan i fysik.

    ”Från forskning till fysikundervisning” är en konferensserie som arrangeras av Nationellt resurscentrum för fysik (NRCF). NRCF har till uppgift att stödja lärares undervisning i fysik, från förskola till gymnasienivå. Vi strävar efter att överbrygga gapet mellan skolans praktik och forskning och att sprida resultat av forskningsbaserade utvecklingsarbeten. Den andra konferensen i serien ägde rum i Lund den 10-11 april 2018 och samlade 56 lärare och forskare från hela landet. Under konferensen varvades föreläsningar med parallella sessioner där deltagarna presenterade sina bidrag.

    Hur fysik kan bli ett viktigt verktyg för att rädda liv genom att låta solljus desinficera vatten1 var temat för det första inbjudna föredraget som gavs av Pilar Fernandez-Ibáñez från Ulster University i Nordirland

    Konrad Schönborn från Linköpings universitet visade under den andra föreläsningen exempel på hur interaktiva visualiseringar kan göra det osynliga synligt, både inom fysik och andra delar av naturvetenskapen. Deltagarna fick sedan möjlighet att under en workshop själva prova hur en värmekamera kan användas i klassrummet.

    Claudia Haagen-Schützenhöfer från University of Graz i Österrike berättade under det tredje föredraget om designbaserad forskning som syftade till att elever ska uppnå bättre förståelse av begreppet ljus (Haagen-Schützenhöfer, 2017).

    Den avslutande föreläsningen gavs av Stan Micklavzina från University of Oregon, USA. Han har utvecklat ett mycket stort antal demonstrationsexperiment för att illustrera olika fysikaliska fenomen. Han har även samarbetat med bland annat skådespelare och cirkusartister. Föreläsningen innehöll experiment som varit en del av en teaterföreställning om Nicola Tesla.

    Även några av deltagarnas bidrag presenterades under plenarsessionerna. Linda Gunnarsson, Fredrik Nordling och Fredrik Olofsson från Hulebäcksgymnasiet demonstrerade ett lektionsupplägg för aktivt lärande. I ett sådant upplägg flyttas fokus i planeringen från frågan ”Vad ska läraren göra?” till ”Vad ska eleverna göra?” De använde undervisningsmetoden 5E: Engage, Explore, Explain, Elaborate, Evaluate. Som ett exempel på metoden fick deltagarna på konferensen se ett klipp från filmen Kill Bill. Därefter fick deltagarna, i smågrupper, med hjälp av en liten skrivtavla, analysera om det som visades i filmen kunde vara rimligt ur fysikalisk synvinkel.

    Jakob Lavröd berättade om tävlingen International Young Physicists’ Tournament (IYPT)2 och hur denna tävling kan knytas till gymnasiearbetet. Under den följande pausen fick deltagarna möjlighet att träffa gymnasister som deltagit i tävlingen. De presenterade också några av sina experiment.

    I den här konferensboken presenterar vi några av de bidrag som presenterades under konferensen – med fysiken i centrum.

  • Losand, Erik
    Linköping University, Department of Behavioural Sciences and Learning. Linköping University, Faculty of Educational Sciences.
    ”Inkluderande undervisning – livsviktigt för några, men bra för alla”: Rektorers syn på inkludering och deras erfarenheter av ett inkluderingsprojekt2018Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna kvalitativa intervjustudie undersöker grundskolerektorers syn på fenomenet inkludering och vilka erfarenheter de har av att ha övergått från specialundervisning i särskilda undervisningsgrupper (SU-grupper) till en inkluderande undervisning. Inkludering är något som förespråkas inom samhället i allmänhet, och i skolan i synnerhet. Samtidigt visar både min studie och tidigare forskning att det saknas en samsyn, både inom den specialpedagogiska diskursen och inom den svenska skolan, kring innebörden av inkludering. Då den aktuella kommunen genomgått ett inkluderingsprojekt, genom att avveckla SU- grupper och istället fortbilda skolpersonalen inom kommunen så att dessa ges förutsättningar för att ta emot elever som tidigare gått i dessa, undersöker denna studie vilka erfarenheter skolornas rektorer har av denna inkluderingsprocess. Processen pågår fortfarande i kommunen och det finns flera framgångsfaktorer som lyfts fram samtidigt som hinder och utmaningar för inkludering tas upp. Det huvudsakliga syftet med studien är att undersöka rektorers syn på inkludering och deras erfarenheter av att ha genomgått ett inkluderingsprojekt, vilket mynnar ut i dels framgångsfaktorer och utmaningar, dels en diskussion kring den bristande samsynen kring inkluderingsbegreppet och vilken typ av inkludering som målet för dagens skola.

  • Wiberg, Anton
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, Faculty of Science & Engineering.
    Towards Design Automation for Additive Manufacturing: A Multidisciplinary Optimization approach2019Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    In recent decades, the development of computer-controlled manufacturing by adding materiallayer by layer, called Additive Manufacturing (AM), has developed at a rapid pace. The technologyadds possibilities to the manufacturing of geometries that are not possible, or at leastnot economically feasible, to manufacture by more conventional manufacturing methods. AMcomes with the idea that complexity is free, meaning that complex geometries are as expensiveto manufacture as simple geometries. This is partly true, but there remain several design rulesthat needs to be considered before manufacturing. The research field Design for Additive Manufacturing(DfAM) consists of research that aims to take advantage of the possibilities of AMwhile considering the limitations of the technique.

    Computer Aided technologies (CAx) is the name of the usage of methods and software thataim to support a digital product development process. CAx includes software and methodsfor design, the evaluation of designs, manufacturing support, and other things. The commongoal with all CAx disciplines is to achieve better products at a lower cost and with a shorterdevelopment time.

    The work presented in this thesis bridges DfAM with CAx with the aim of achieving designautomation for AM. The work reviews the current DfAM process and proposes a new integratedDfAM process that considers the functionality and manufacturing of components. Selectedparts of the proposed process are implemented in a case study in order to evaluate theproposed process. In addition, a tool that supports part of the design process is developed.

    The proposed design process implements Multidisciplinary Design Optimization (MDO) witha parametric CAD model that is evaluated from functional and manufacturing perspectives. Inthe implementation, a structural component is designed using the MDO framework, which includesComputer Aided Engineering (CAE) models for structural evaluation, the calculation ofweight, and how much support material that needs to be added during manufacturing. Thecomponent is optimized for the reduction of weight and minimization of support material,while the stress levels in the component are constrained. The developed tool uses methodsfor high level Parametric CAD modelling to simplify the creation of parametric CAD modelsbased on Topology Optimization (TO) results.

    The work concludes that the implementation of CAx technologies in the DfAM process enablesa more automated design process with less manual design iterations than traditional DfAM processes.It also discusses and presents directions for further research to achieve a fully automateddesign process for Additive Manufacturing.

    List of papers
    1. Design for additive manufacturing: a review of available design methods and software
    Open this publication in new window or tab >>Design for additive manufacturing: a review of available design methods and software
    2019 (English)In: Rapid prototyping journal, ISSN 1355-2546, E-ISSN 1758-7670, Vol. 25, no 6, p. 15p. 1080-1094Article, review/survey (Refereed) Published
    Abstract [en]

    Purpose

    This paper aims to review recent research in design for additive manufacturing (DfAM), including additive manufacturing (AM) terminology, trends, methods, classification of DfAM methods and software. The focus is on the design engineer’s role in the DfAM process and includes which design methods and tools exist to aid the design process. This includes methods, guidelines and software to achieve design optimization and in further steps to increase the level of design automation for metal AM techniques. The research has a special interest in structural optimization and the coupling between topology optimization and AM.

    Design/methodology/approach

    The method used in the review consists of six rounds in which literature was sequentially collected, sorted and removed. Full presentation of the method used could be found in the paper.

    Findings

    Existing DfAM research has been divided into three main groups – component, part and process design – and based on the review of existing DfAM methods, a proposal for a DfAM process has been compiled. Design support suitable for use by design engineers is linked to each step in the compiled DfAM process. Finally, the review suggests a possible new DfAM process that allows a higher degree of design automation than today’s process. Furthermore, research areas that need to be further developed to achieve this framework are pointed out.

    Originality/value

    The review maps existing research in design for additive manufacturing and compiles a proposed design method. For each step in the proposed method, existing methods and software are coupled. This type of overall methodology with connecting methods and software did not exist before. The work also contributes with a discussion regarding future design process and automation.

    Place, publisher, year, edition, pages
    Emerald Group Publishing Limited, 2019. p. 15
    Keywords
    Additive manufacturing, Design automation, Design for additive manufacturing, Design optimization, Knowledge-based engineering
    National Category
    Mechanical Engineering
    Identifiers
    urn:nbn:se:liu:diva-160357 (URN)10.1108/RPJ-10-2018-0262 (DOI)000482449200011 ()2-s2.0-85070356872 (Scopus ID)
    Note

    Funding agencies: European Union [738002]

    Available from: 2019-09-19 Created: 2019-09-19 Last updated: 2019-10-14Bibliographically approved
    2. AN OPTIMIZATION FRAMEWORK FOR ADDITIVE MANUFACTURING GIVEN TOPOLOGY OPTIMIZATION RESULTS
    Open this publication in new window or tab >>AN OPTIMIZATION FRAMEWORK FOR ADDITIVE MANUFACTURING GIVEN TOPOLOGY OPTIMIZATION RESULTS
    2018 (English)In: Tools and Methods of Competitive Engineering: Implementation, application and utilization of smart systems, 2018Conference paper, Published paper (Other academic)
    Abstract [en]

    In this paper, a method of designing for Additive Manufacturing (AM) is proposed, implemented, and evaluated in a case study. In the proposed method, Topological Optimization is combined with a Multidisciplinary Design Optimization (MDO) framework that handles multi-objective optimization. Both the weight and amount of support material needed during manufacturing are minimized. In the proposed method, the topological optimized structure is remodelled into a parametric CAD model. The CAD model is then combined with an FE-model that calculates the stresses in the material and a model that calculates the amount of support structure needed. Two different optimization formulations are evaluated and compared in the case study.

    In the case study an upright of a Formula Student racing car is designed. Several design evaluations are performed resulting in a set of Pareto optimal designs that could be used for decision-making where the trade-off between the two objectives is considered. It is concluded that the proposed method fulfils its purpose by being able to identify designs that would be difficult to come up with manually. Several suggestions for further studies in order to improve the method are also discussed.

    Keywords
    Additive Manufacturing, Design for Additive Manufacturing, Topology Optimization, Design Optimization, Multidisciplinary Design Op
    National Category
    Other Mechanical Engineering
    Identifiers
    urn:nbn:se:liu:diva-150367 (URN)
    Conference
    Twelfth International Symposium on Tools and Methods of Competitive Engineering (TMCE 2018), Las Palmas de Gran Canaria, Spain, 7-11 May 2018
    Available from: 2018-08-20 Created: 2018-08-20 Last updated: 2019-10-14
    3. Design for Additive Manufacturing using a Master Model approach
    Open this publication in new window or tab >>Design for Additive Manufacturing using a Master Model approach
    2019 (English)Conference paper, Published paper (Refereed)
    National Category
    Production Engineering, Human Work Science and Ergonomics
    Identifiers
    urn:nbn:se:liu:diva-160905 (URN)
    Conference
    Proceedings of the ASME 2019, International Design Engineering Technical Conferences, and Computers and Information in Engineering Conference IDETC/CIE2019, Anaheim, CA, USA.
    Available from: 2019-10-14 Created: 2019-10-14 Last updated: 2019-10-14Bibliographically approved
  • Cadorin, Eduardo
    et al.
    Linköping University, Department of Management and Engineering, Project Innovations and Entrepreneurship. Linköping University, Faculty of Arts and Sciences.
    Klofsten, Magnus
    Linköping University, Department of Management and Engineering, Project Innovations and Entrepreneurship. Linköping University, Faculty of Science & Engineering. Linköping University, HELIX Competence Centre.
    Löfsten, Hans
    Department of Technology Management and Economics, Chalmers University of Technology, Gothenburg, Sweden.
    Science Parks, talent attraction and stakeholder involvement: an international study2019In: Journal of Technology Transfer, ISSN 0892-9912, E-ISSN 1573-7047, p. 1-28Article in journal (Refereed)
    Abstract [en]

    One aspect of Science Parks development that has come into focus is the attraction of talent, which could include attracting specific expertise, making it easier for firms to be established and reach skilled workers. In order to encompass different contexts, both economic and cultural, a questionnaire was sent to 120 Science Parks, of which 59 (49%) replied. The study included 22 variables, including eleven independent variables according to Science Park stakeholders and characteristics when selecting talent for tenant firms, five control variables, and six variables of Science Park success dimensions. The results show that the characteristics of talent contribute to the park’s success. Universities are the primary source of talent, and the government has a critical role in promoting collaboration between firms and universities. Therefore, park managers should promote links with local universities and the student community as well as strengthen their relationship with government representatives at all levels to receive the necessary support for park development.

  • Hasler, Berit
    et al.
    Department of Environmental Science, Aarhus University, Aarhus, Denmark.
    Hyytiäinen, Kari
    Faculty of Agriculture and Forestry, University of Helsinki ,Helsinki, Finland.
    Refsgaard, Jens Christian
    Department of Hydrology, Geological Survey of Denmark and Greenland, Copenhagen, Denmark.
    Smart, James C. R.
    School of Environment and Science and the Australian Rivers Institute at Griffith University, Brisban, Australia.
    Tonderski, Karin
    Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, Faculty of Science & Engineering.
    Sustainable ecosystem governance under changing climate and land use: An introduction2019In: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, p. 1-5Article in journal (Refereed)
    Abstract [en]

    Combatting eutrophication is currently a major challenge for policy makers in the Baltic Sea region, and it is likely to remain so in the decades to come. Although total nutrient loads to the Baltic Sea have recently declined, the gap between current loadings and those required to ensure the desired status is still substantial (Reusch et al. 2018). This Special Issue is dedicated to research that helps inform how the eutrophication challenge might best be addressed by improving our understanding of technological constraints, societal drivers of change, land uses, environmental policies, and innovative governance with stakeholder involvement. These issues are important for the current generation and those to come and are issues we must address in order to succeed in reducing nutrient loads to the desired levels to gradually achieve the desired good environmental status of the Baltic Sea. Currently, we witness a new era of water policies across the entire Baltic Sea region. Our changing climate is impacting on precipitation and runoff, and is also the reason why new EU climate policies seek to tie carbon sinks more visibly to carbon sources. Both these aspects have repercussions for water policies. Thus, solving eutrophication challenges requires sharpening of existing policies and instruments, as well as creating new insights and governance approaches with broad stakeholder involvement in a changing environment. In order to design coherent water and climate policies, and target and implement those policies more efficiently, policy makers need to combine new insights regarding the inhabitants in the region, the catchments, and the Baltic Sea itself. Such insights can be expected from soil scientists, agronomists, hydrogeologists, marine ecologists, economists, and social and policy scientists. What is needed is on the one hand effectively targeted governance at appropriate spatial and temporal scales, adapted to differing interests and motivations of citizens living around the Baltic Sea, and on the other hand fine tuning and co-designing of policies at local, national, Baltic Sea regional and EU level. This Special Issue brings together recent research from four BONUS-funded projects—BONUS BALTICAPP, BONUS GO4BALTIC, BONUS MIRACLE and BONUS SOILS2SEA—that comprised part of the ‘Viable Ecosystem’ and ‘Sustainable Ecosystem Services’ BONUS research programmes. The projects addressed these common concerns through somewhat different, but inter-related, themes. Key messages emphasized and discussed in the research papers of this Special Issue are summarized under four interlinked themes: Scenarios for the future, Policies and ecosystem services in water governance, Novel approaches for managing nutrients, and Advanced modelling from field level to the entire Baltic Sea region.

  • Lundeborg Hammarström, Inger
    Linköping University, Department of Clinical and Experimental Medicine, Division of Speech language pathology, Audiology and Otorhinolaryngology. Linköping University, Faculty of Medicine and Health Sciences.
    Manual till LINUS 2.0: LINköpingsUnderSökningen 2.0: Ett fonologiskt bedömningsmaterial för barn från 3 år2019Report (Other academic)
    Abstract [sv]

    När ett barn med misstänkta tal- och språkavvikelser kommer till logoped för bedömning är det viktigt att samtliga aspekter av tal och språk beaktas. Under de år som svensk logopedi har vuxit fram, har ett flertal instrument för bedömning av barns tal- och språk tagits fram. Ett av dessa, Stora fonemtestet, som skapades i mitten av 1980-talet, har länge varit det enda vitt spridda testet av barns fonologi i landet. Testet fanns under flera år inte att beställa på förlag, vilket var ett av motiven till arbetet med att ta fram ett nytt fonologiskt bedömningsmaterial. Ett annat var att Enheten för logopedi vid Linköpings universitet sedan 2010 ingår i en större multicenterstudie med syftet att jämföra fonologiska avvikelser hos barn i olika länder. Inom ramen för detta projekt och genom några magisterarbeten i logopedi färdigställdes LINUS 2014. Som en direkt följd av det fortsatta internationella forskningssamarbetet och av feed-back från kollegor som använt materialet i sin kliniska vardag, kommer nu en ny version av materialet, LINUS 2.0. och finns för gratis nedladdning på http://phonodevelopment.sites.olt.ubc.ca/practice-units/swedish/. Vi hoppas att det även fortsatt skall komma till användning vid utredning av tal- och språkförmåga hos barn.

    Linköpings universitet, 2019

    Inger Lundeborg Hammarström

  • Jonsson, Filippa
    et al.
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Möller, Linnéa
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    En flerdimensionell syn på förändring: En fallstudie som problematiserar användares involvering i och inställning till en IT-förändringsprocess, både ur deras egna och förändringsledningens perspektiv.2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Background: To help users through an IT change process, that is implemented to attain the need of digitalization, different tools for of change management are used. Previous research state that users and user involvement in change processes are important factors to be able to succeed with changein IT. Additionally, research shows that management of users is problematic due to user attitude and their motivation. Since a new system is expected to be used by the users, it is important for the change management to gain a good understanding of the users' situation to create a basis for organizations to attain sustainable changes.

    Purpose: The purpose of the study is to examine how the stakeholdersusers and change management  with different perspectives experience an implemented IT change processes, focusing on the user’s involvement and their attitude towards it. Furthermore the study aimstudy aims to unravel how a multidimensional perspective and understanding can help organizations to implement more sustainable changes.

     

    Method: Using a qualitative approach, semi-structured interviews led to a conduction of empirical data from users and change leaders from two organizations. These two organizations had together accomplished a change process which we use as our case study. Furthermore, the empirical data has been interpreted and analyzed in order to conduce a conclusion.

    Conclusion: Users and the change management of an organizationleaders can experience change processes different depending onaccording to their different perspectives. For instance, tOur caseThe study showed that the expected change has a big impact on the users' attitude towards the change process, concerning b. oth their ambition to participate and to accept the change. We suggest the management toThe management should centralize the users, using informing, user participation and education to increase their involvement and knowledge. To centralize the user is not only important during the project process but it is also important after the result of the change has been implemented. The change management needneeds to support the users during their adaption and transition process for them to assimilate the changefully absorb the change. According to our study, it would therefore increase the opportunities for the organization to accomplish changes that can attain it’sits expected value from the perspective of different stakeholdersusers and change management to eventually terminate in sustainable change..

  • Krigsman, Carl
    et al.
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Zahirovic, Armin
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Knowledge transfer in IT-Service organizations: A qualitative case study researching a boundary object theory perspective on knowledge transfer through information systems, in an ITIL context2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Knowledge management is seen as a hot topic in order for organizations to become effective and utilize the knowledge residing within the organization. The most important factor in knowledge management is believed to be the knowledge transfer, which is the process of transferring knowledge between two parties. A context in which knowledge and knowledge transfer are especially important is within the best practice framework ‘ITIL’ and IT-service organizations. Therefore, the purpose with this study is to analyze how knowledge is transferred through information systems in an ITIL organization, and how the transfer process can be further understood by incorporating individual perspectives on knowledge. Besides that, our purpose is to identify factors influencing the knowledge transfer from both the organizations and the ITIL framework. The reason for this is that knowledge transfer through information systems in an ITIL context is rather underexplored, previous research regarding this is mainly focusing on putting knowledge in repositories and make it available, which is believed to create certain implications regarding the individual perspective in the creation and transfer of knowledge through information systems. These implications are something that has not been explored, which is a knowledge gap we intend to fill with this thesis. That is why we have constructed three research questions regarding how the organizations understand what valuable knowledge is, what factors that is influencing their knowledge transfer, and how these previously individual aspects can be further understood by applying the boundary object theory on knowledge transfer through information systems.

    From a multi case study with semi structured interviews we could collect a valuable collection of empirical data, that was collected from six respondents representing three organizations. By applying the interpretive and social constructivist research philosophy with an abductive methodological approach, previous research and the boundary object theory in combination with the theory of knowledge creation we could analyze our empirical data. Our study shows that the perspective on valuable knowledge is something with direct relation to ITIL, and highly connected to what its contribution is to the core business that the IT-service organization is helping. Valuable knowledge is also seen as stored knowledge. We can from our study also see that there are four predominant forces influencing the knowledge transfer process. We identified that the overall perspective on what knowledge is in the organization, how and what the organization values as knowledge, the ITIL framework and their knowledge management strategy directly influenced knowledge transfer.

    Our main finding in this study is that when organizations are transferring knowledge through information systems the individual perspective on both knowledge, knowledge creation and the knowledge transfer is one of the most important to keep in mind. The knowledge in the information systems is a way to communicate among individuals, and a way to translate one individual’s knowledge to another, hence is the individual creating the knowledge an important factor to acknowledge. We can see that aspects such as experiences, skills, insights, purposes, perspectives and contextual understandings highly influence the knowledge being created, hence the possibility to create rich knowledge at the receiver of knowledge. These aspects also influence whether the stored knowledge has any tacit elements, which seems to facilitate learning more for the receiving individual.

  • Albinsson, Josefin
    et al.
    Linköping University, Department of Social and Welfare Studies.
    Hållberg, Lisen
    Linköping University, Department of Social and Welfare Studies.
    Fritidspersonalens verklighet: En enkätstudie om vilken syn personal inom fritidshem har på sin arbetsroll och sitt uppdrag2019Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Efter att fritidshemmet år 2016 fick ett eget kapitel i läroplanen styrktes fritidslärarnas uppdrag ytterligare och från den första juli 2019 blir det krav på behörighet och legitimation för lärare i fritidshem. Med anledning av att yrket har gått, och går igenom förändringar, kan det öppnas upp för att nya förmågor och kunskaper blir av värde att ha i verksamheten jämfört med tidigare. Syftet med denna studie är att undersöka vad verksam personal inom fritidshem anser är värdefulla kvaliteteter, kunskaper och förmågor att besitta vid arbete inom fritidshem. Vi vill även undersöka hur personal inom fritidshem ser på sin yrkesroll och sitt uppdrag. Studien har en kvantitativ metod där vi använt oss av webbenkät för att få in data från personal inom fritidshem, 53 stycken valde att besvara enkäten.

    Vårt resultat pekar på att ledarskapsförmåga och kunskaper kring konflikthantering är det som är mest värdefullt vid arbete inom fritidshem. Att inneha en relevant pedagogisk utbildning är av vikt men det innebär inte att en person nödvändigtvis är lämplig för arbete inom fritidshem. Kunskaper samt personliga förmågor är mer värdefullt än en relevant pedagogisk utbildning. Det som är minst viktigt att inneha är yrkeserfarenhet samt kunskaper kring digitala verktyg. Resultatet pekar även på att personal inom fritidshem anser att deras arbetsuppgifter ska ha en koppling till fritidshem, alternativt grunda sig i fritidspedagogik, även under skoltid. Våra respondenter tar tydligt avstånd från skolans ordinarie verksamhet, och vill inte arbeta som elevassistent eller resurs i klass.

  • Vucic, Stefan
    Linköping University, Department of Management and Engineering, Political Science. Linköping University, Faculty of Arts and Sciences.
    International Negotiations: Language in Crisis and Conflict Handling Negotiations, and vice versa: A conceptual study on international crisis/conflict negotiations considered in Wittgensteinian, Austinian and Derridean terms, with reflections on the cases of Oslo 1 Accords 1993 and Rambouillet Negotiations 19992019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The thesis presents a conceptual study engaging the theories emerged in the philosophy of language and the theories of international relations and negotiations into a single framework. The framework comprises the concepts developed by L. Wittgenstein, J. L. Austin, and J. Derrida whose relevance has been identified through searching for the zone of common grounds in which they could contribute to the theoretical knowledge on international negotiations in crisis and conflict handling contexts. It has accordingly been developed following the lines of the IR/negotiations theoretical set, but also adjusted by considering two relevant empirical cases. The said Wittgenstein-Austin-Derrida framework has been assigned the mission to study language as a tool in crisis/conflict negotiations, but likewise to consider crisis/conflict negotiations in the framework of language. This implies the post-structuralist approach to the international affairs, which enables the possibility of deconstructing the matter on its textual/discursive components. On such grounds, it perceives the ‘text’ as a source of political power, i.e. as a pattern which comprises the present institutions. By virtue of assigning new meanings to the ‘text’, it regards discourses as that what creates agencies in international relations.

  • Andersson, Per
    et al.
    Linköping University, Department of Behavioural Sciences and Learning, Education and Adult Learning. Linköping University, Faculty of Educational Sciences.
    Nyström, Sofia
    Linköping University, Department of Behavioural Sciences and Learning, Education and Adult Learning. Linköping University, Faculty of Educational Sciences. Region Östergötland, Center for Diagnostics, Department of Clinical Immunology and Transfusion Medicine.
    Editorial: Nordic research on vocational education and training2017In: Nordic Journal of Vocational Education and Training, ISSN 2242-458X, E-ISSN 2242-458X, p. iii-vArticle in journal (Other academic)
    Abstract [en]

    Welcome to a new issue of the Nordic Journal of Vocational Education and Training. We continue to develop an open forum for research on vocational and professional education and training, with a particular focuson the Nordic con-texts. Our journal is published online, open access, and there are no submission or article processing charges, which means that anyone with access to the Inter-net also has access to the research findings we present.

  • Nielsen, Lina
    et al.
    Linköping University, Department of Social and Welfare Studies.
    Bergendahl, Karl
    Linköping University, Department of Social and Welfare Studies.
    "Varför skulle hon släppa taget?": En diskursanalytisk studie kring konstruktionen av anorexia nervosa i handböcker för behandlare och professionella.2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med denna kvalitativa litteraturstudie är att granska hur anorexia nervosa och tillfrisknande konstrueras i handböcker vilka skrivna för och använda av behandlare och professionella vilka arbetar med anorexia nervosa och andra ätstörningar. Studien har sin teoretiska grund i socialkonstruktionism och använder sig av Michel Foucaults resonemang kring produktiv makt, disciplin och panopticon. Dessa begrepp används i studien för att nå en djupare analysnivå. Tidigare forskning om anorexia nervosa har visat på komplexiteten av fenomenet och behovet av vidare forskning. Anorexia nervosa ses i regel som ett individuellt problem. Viss forskning föreslår att detta perspektiv behöver breddas och att det sociala arbetet kan fylla en viktig funktion i relation till detta. Studiens grundläggande empiriska material erhölls från Länsteamet på Ätstörningsenheten i Region Östergötland och var i form av handböcker kring ämnena anorexia nervosa och ätstörningar. Metodologin i denna studie är diskursanalytisk och utfördes med hjälp av Carol Bacchis analysverktyg What is the problem represented to be? Studiens resultat visar på ett antal olika diskurser kring tillfrisknande. I dessa kan vi se tendenser kring vad som lämnas oproblematiserat i skapandet av den drabbade samt hur ett tillfrisknande går till i relation till anorexia nervosa. Vanligt förekommande diskursiva element ger vid handen att det är individens uppgift och ansvar att iscensätta sitt eget tillfrisknande. I relation till Foucaults begrepp produktiv makt, disciplin och panopticon kan tillfrisknandet ses som ett exempel på en maktteknologi. Individens fortsatta välmående och liv kopplas samman med dennes produktivitet. Således är makten inbyggd i individens tillfrisknande. Förhoppningen är att denna studie bidrar till medvetenhet kring konstruktionen av anorexia nervosa som problem och samtidigt presentera förgivettagna problemkonstruktioner. Studien kan sägas vara explorativ och den öppnar för vidare frågeställningar kring makt, tillfrisknande och anorexia nervosa i relation till socialt arbete.

  • Liljenberg, Helena
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Management and Engineering, Commercial and Business Law.
    Marknadsföring av alternativa investeringsfonder till icke-professionella investerare: En analys av regleringens ändamålsenlighet2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    I kölvattnet av finanskrisen 2008 har regleringen på det finansiella området ökat markant. En del av den finansiella marknaden som varit nästintill oreglerad innan 2008 års finanskris är verksamheten för förvaltare av alternativa investeringsfonder (AIF-förvaltare). Sedan 2011 omfattas dock denna verksamhet av reglering på såväl unionsrättslig nivå, i och med Europaparlamentets och rådets direktiv 2011/61/EU, som på nationell nivå, i och med direktivets implementering i svensk rätt genom lagen (2013:561) om förvaltare av alternativa investeringsfonder (LAIF). Motiven för reglering på det finansiella området i allmänhet och för AIF-förvaltare i synnerhet har varit flera, emellertid är säkerställande av stabilitet i det finansiella systemet det mest framträdande.

    I uppsatsen undersöks huruvida regleringen avseende marknadsföring av AIF-fonder till icke-professionella investerare är ändamålsenlig. För att besvara frågeställningen om regleringens ändamålsenlighet identifieras LAIF:s övergripande såväl som underliggande ändamål och används som utvärderingsvariabel. Med hjälp av utvärderingsvariabeln undersöks i vilken utsträckning de övergripande ändamålen tillgodoses med regleringens utformning. 

    Regleringen av marknadsföring av AIF-fonder till icke-professionella investerare skiljer sig åt. Dessa skillnader föranleds av motivet att skydda investerare, ty olika AIF-fonder har olika starkt investerarskydd. Investerarskyddet vid marknadsföring av AIF-fonder tar sig uttryck genom bestämmelser om informationsgivning och produktingripande åtgärder. Kraven på informationsgivning ämnar hjälpa investerare att fatta väl övervägda och kvalitativt bättre investeringsbeslut. I uppsatsen påvisas dock att omfattande informationsgivning, något som kraven på informationsgivning i LAIF föranleder, till stora delar är ett ineffektivt skydd emedan informationsgivningen inte sällan leder till informationsöverflöd. Anledningen härför är investerares, främst konsumenters, tillkortakommanden i form av bristande kognitiv förmåga. Vidare försvårar den befintliga investerarklassificeringen för investerare att erhålla ett adekvat skydd genom informationsgivning. Klassificeringen av investerare medför att även institutionella investerare faller in under kategorin ”icke-professionella investerare” trots att skyddsnivån i regleringen är anpassad efter konsumenters skyddsbehov. De produktingripande åtgärderna, å andra sidan, förhindrar marknadsföring av AIF-fonder, i form av riskkapitalfonder, till konsumenter med anledning av att dessa AIF-fonder bedöms för riskfyllda för konsumenter att investera i. Utformningen av de produktingripande åtgärderna i LAIF får dock följden att erhållet skydd beror på personlig status, eftersom det skydd konsumenterna erhåller utgörs av en miniminivå för investering. 

    I uppsatsen ifrågasätts således investerarskyddets utformning vid marknadsföring av AIF-fonder i LAIF och hur långt detta skydd kan sträcka sig i förhållande till andra i lagen beaktansvärda intressen. Till diskussionen är även gränsdragningen mellan investerares legitima skyddsbehov och överbeskydd, av vikt. Frågan om huruvida regleringen avseende marknadsföring av AIF-fonder till icke-professionella investerare är adekvat utformad, besvaras i uppsatsen nekande. Därtill presenteras förslag på förändring av regleringens utformning de lege ferenda, i syfte att uppnå en mer ändamålsenlig reglering.

  • Abramian, David
    et al.
    Linköping University, Department of Biomedical Engineering, Division of Biomedical Engineering. Linköping University, Faculty of Science & Engineering.
    Eklund, Anders
    Linköping University, Department of Biomedical Engineering, Division of Biomedical Engineering. Linköping University, Department of Computer and Information Science, The Division of Statistics and Machine Learning. Linköping University, Faculty of Science & Engineering. Linköping University, Center for Medical Image Science and Visualization (CMIV).
    REFACING: RECONSTRUCTING ANONYMIZED FACIAL FEATURES USING GANS2019In: 2019 IEEE 16TH INTERNATIONAL SYMPOSIUM ON BIOMEDICAL IMAGING (ISBI 2019), IEEE , 2019, p. 1104-1108Conference paper (Refereed)
    Abstract [en]

    Anonymization of medical images is necessary for protecting the identity of the test subjects, and is therefore an essential step in data sharing. However, recent developments in deep learning may raise the bar on the amount of distortion that needs to be applied to guarantee anonymity. To test such possibilities, we have applied the novel CycleGAN unsupervised image-to-image translation framework on sagittal slices of T1 MR images, in order to reconstruct, facial features from anonymized data. We applied the CycleGAN framework on both face-blurred and face-removed images. Our results show that face blurring may not provide adequate protection against malicious attempts at identifying the subjects, while face removal provides more robust anonymization, but is still partially reversible.

  • Nordström, Filippa
    et al.
    Linköping University, Department of Management and Engineering, Commercial and Business Law. Linköping University, Faculty of Arts and Sciences.
    Istephansson, Tania
    Linköping University, Department of Management and Engineering, Commercial and Business Law. Linköping University, Faculty of Arts and Sciences.
    Influencer marketing – En avdragsgill kostnad eller gåva?: En utredande uppsats om svenska aktiebolags skatterättsliga konsekvenser till följd av produktutskick till influencers.2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Sociala medier har på senare år blivit allt mer populära och användandet av olika sociala medier har följaktligen ökat. Även företags intresse av att marknadsföra sig på sociala medier har ökat och såväl viral marknadsföring som influencer marketing är numera väl använda marknadsföringsmetoder av olika företag. Influencer marketing är en marknadsföringsmetod som innebär att bolag marknadsför sina produkter via så kallade influencers sociala kanaler. I samband med att fler och fler företag använder sig av influencer marketing har det blivit allt vanligare med produktutskick från företagen till influencers. När ett bolag skickar ut produkter till en influencer utan att något uttryckligt avtal mellan bolaget och influencern föreligger, har influencern dock ingen skyldighet att marknadsföra produkten å bolagets vägnar. Fråga uppstår i de fallen hur bolaget skall klassificera kostnaderna som uppstår i samband med sådana produktutskick. En annan fråga som måste besvaras är om bolaget, till följd av ett utskick av produkter, riskerar att bli uttagsbeskattat. I uppsatsen kommer således bolagets skatterättsliga konsekvenser till följd av sådana utskick av produkter, när avtal mellan parterna saknas, att utredas.

    Inledningsvis har begreppen sociala medier, influencers och influencer marketing definierats och klargjorts. Därefter har gåvorekvisitet samt olika skatterättsliga aspekter och lagregler behandlats i uppsatsen. Vidare har reklamgåva, personalkostnader samt reklam- och PRkostnader berörts innan reglerna om uttagsbeskattning slutligen har beskrivits. Den information som har redogjorts för har sedan legat till grund för uppsatsens analys.

    I uppsatsen konstateras att klassificeringen av bolagets kostnader är beroende av dels vilket inkomstslag som influencern skall beskattas i, dels vilken motprestation som utskicket motsvaras av. Full avdragsrätt föreligger emellertid oavsett för bolaget, förutsatt att bolagets syfte med utskicket är att influencern skall marknadsföra produkterna från utskicket och förutsatt att influencern inte skickar tillbaka produkten eller produkterna. Vad gäller frågan om uttagsbeskattning kan bolaget endast bli uttagsbeskattat för produktutskicket i de fall som det kan ses som att det är bolagets aktieägare som har skickat produkterna till influencern, och inte bolaget självt.

  • Andersson, Per
    et al.
    Linköping University, Department of Behavioural Sciences and Learning, Education and Adult Learning. Linköping University, Faculty of Educational Sciences.
    Skonhoft Johannesen, Hedvig
    Fakultet for lærerutdanning og internasjonale studier, OsloMet – Oslo Metropolitan University, Norway.
    Nyström, Sofia
    Linköping University, Department of Behavioural Sciences and Learning, Education and Adult Learning. Linköping University, Faculty of Educational Sciences.
    Editorial: Spring 20192019In: Nordic Journal of Vocational Education and Training, ISSN 2242-458X, E-ISSN 2242-458X, Vol. 9, no 2, p. iii-viArticle in journal (Other academic)
  • Lindqvist, Henrik
    Linköping University, Department of Behavioural Sciences and Learning, Education, Teaching and Learning. Linköping University, Faculty of Educational Sciences.
    Strategies to cope with emotionally challenging situations in teacher education2019In: Journal of Education for Teaching, ISSN 0260-7476, E-ISSN 1360-0540, p. 1-13Article in journal (Refereed)
    Abstract [en]

    Learning to teach is an emotional endeavour and student teachers challenging emotions are recurrently created in teacher education. The aim of this study was to investigate student teachers'€™ coping with emotionally challenging situations in teacher education. In the study, 22 student teachers studying their last year of teacher education participated through semi-structured interviews. The data were analysed using constructivist grounded theory methodology. The findings revealed that coping with emotionally challenging situations was connected to student teachers’ main concern of the discrepancies between idealistic conceptions and experiences. This included wanting to have an extensive impact on future pupils as a student teacher and experiencing the ambition as potentially exhausting. In coping with this discrepancy, three strategies were used: change advocacy, collective sharing and responsibility reduction. The coping strategies are discussed in the light of existing literature and potential implications are addressed.

  • Jonsson, Sofia
    Linköping University, Department of Electrical Engineering, Computer Engineering.
    Minimising Memory Access Conflicts for FFT on a DSP2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The FFT support in an Ericsson's proprietary DSP is to be improved in order to achieve high performance without disrupting the current DSP architecture too much. The FFT:s and inverse FFT:s in question should support FFT sizes ranging from 12-2048, where the size is a multiple of prime factors 2, 3 and 5. Especially memory access conflicts could cause low performance in terms of speed compared with existing hardware accelerator. The problem addressed in this thesis is how to minimise these memory access conflicts. The studied FFT is a mixed-radix DIT FFT where the butterfly results are written back to addresses of a certain order. Furthermore, different buffer structures and sizes are studied, as well as different order in which to perform the operations within each FFT butterfly stage, and different orders in which to shuffle the samples in the initial stage.

    The study shows that for both studied buffer structures there are buffer sizes giving good performance for the majority of the FFT sizes, without largely changing the current architecture. By using certain orders for performing the operations and shuffling within the FFT stages for remaining FFT sizes, it is possible to reach good performance also for these cases.

  • Beemer, Chloe
    Linköping University, Department of Management and Engineering.
    Our Common Sea: Global Environmental Governance and The Marine Stewardship Council Story2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Fish. Why do fish matter? Fish are the main source of protein for three billion people on Earth (World Wildlife Fund, 2019), that is roughly 39 percent of the global population (United Nations, 2019, p. 11). Food, in particular, is essential to politics, as it literally fuels the brainpower of mankind. There is power in sustaining this essential resource for generations to come, it is a crucial aspect of the future of food. Power through Sustainability. Focusing on institutions and fishery politics, this research will try to uncover whether or not the Marine Stewardship Council (MSC), a non-state market-driven (NSMD) organization, holds power in global environmental governance by creating an effective international sustainable fishing regime.

     

    The theories and frameworks utilized stretch across multiple disciplines, such as international relations, sociology, international political theory, economics, ecology, fisheries science, and environmental sciences. To better understand the Marine Stewardship Council this study will focus on the global political economy (GPE) and global environmental governance (GEG), international relations green theory and neoliberal theory, and Elinor Ostrom’s Institutional Analysis and Development (IAD), Social-Ecological Systems (SES), and beyond panacea frameworks. The research will try to discover if non-state market-driven governance systems, specifically the Marine Stewardship Council matter in international relations and global politics, employing achieving sustainable global environmental governance goals. Does the MSC influence civil society driven GEG by being an active, international sustainable fishing institution, or is the MSC merely the only feasible option for international fisheries governance?

  • Hjelm, Carina
    et al.
    Linköping University, Department of Medical and Health Sciences, Division of Nursing Science. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Heart and Medicine Center, Department of Thoracic and Vascular Surgery.
    Andreae, Christina
    Linköping University, Department of Medical and Health Sciences, Division of Nursing Science. Linköping University, Faculty of Medicine and Health Sciences. Centre for Clinical Research Sörmland, Uppsala University, Sweden.
    Isaksson, Rose-Marie
    Linköping University, Department of Medical and Health Sciences, Division of Nursing Science. Linköping University, Faculty of Medicine and Health Sciences.
    From insecurity to perceived control over the heart failure disease–A qualitative analysis2019In: Nursing & Care Open Access Journal, E-ISSN 2572-8474, Vol. 6, no 3, p. 101-105Article in journal (Refereed)
    Abstract [en]

    Aims and objectives: The objective in our study was to explore chronic heart failure patients’ perceived control over their heart disease.

    Background: Higher levels of perceived control over one’s chronic heart disease are associated with lower levels of psychological distress and a higher quality of life.

    Design: The study has an explorative and descriptive design using a directed manifest qualitative content analysis according to Marring.

    Methods: The analysis was based on nine interviews with four men and five women aged between 62-85 years, diagnosed with chronic heart failure. The study followed consolidated criteria for reporting qualitative research (COREQ).

    Results: Five categories emerged in the analysis, mirroring a step-by-step process. The first step, insecurity, was followed by evaluation, management and adjustment. The patients finally reached a higher level of perceived control over their lives in relation to their heart disease.

    Conclusions: Most of the patients stated that they could assess and manage symptoms and had adapted to their condition, which increased their level of perceived control.

    Relevance to clinical practice: These findings suggest that managing symptoms is important for strengthen the patients with chronic heart failure. The findings can help health care professionals in communication with the patient planning for self-care actions.

  • Wahlborg, Magnus
    et al.
    Swedish Transport Administration (Trafikverket), Borlänge, Sweden.
    Peterson, Anders
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
    Gruosso, Lucia
    Ansaldo STS, Genova, Italy.
    Schmidt, Christiane
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
    Jalili, Leila
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
    D3.1 – Final pre-study for an improved methodology for timetable planning including state-of-the-art and future work plan2018Report (Other academic)
    Abstract [en]

    In ARCC project work package 3, research and innovation activities have been done to identify areas with a need for improved timetable planning methods and outline how new methods can be developed and implemented.

    Improved timetable planning scope were described and there was an activity to connect to other relevant Shift2Rail projects. An workshop was organised in Stockholm 2018-05-29.

    State of the art in practice was described for timetable planning in Sweden, UIC 406 method and Ansaldo STS Traffic management systems. Also state of the art in algorithms was described.

    Future work plan research needs areas are:

    1. Understanding of various goals for timetabling and how they co-variate

    2. Residual capacity

    3. Connection and coordination of the planning processes

    4. Connection and coordination of the yard/terminal planning and network planning

    5. Integration of freight trains into the timetable, focusing on short-term and ad-hoc

    6. Integration of maintenance scheduling and timetabling, at all planning stages

    7. Improved decision support for handeling of deviations from timetable in operations

    8. Features of planning tools, and implementation of automatized timetabling

  • Fredriksson, Amira
    Linköping University, Department for Studies of Social Change and Culture, Centre for Municipality Studies – CKS. Linköping University, Faculty of Arts and Sciences.
    Medborgardeltagandets svarta låda - om sortering och värdering av yttranden i samhällsbyggnadsprocesser2019Report (Other academic)
    Abstract [sv]

    Centrum för kommunstrategiska studier (CKS) arbetar med att stödja och bedriva kommunstrategiskt relevant forskning. Vi arbetar med att återföra nyvunnen kunskap till kommunerna och regionerna, och med att skapa möten mellan forskare och kommuner och regioner. 

    I den här rapporten redovisar Amira Fredriksson delar av resultatet i en pågående studie som handlar om deltagande planering. Projektet är en del av det Interregfinansierade projektet Coast4us – ett projekt som löper 2018 – 2020 och där Länsstyrelsen Östergötland är Lead Partner. Projektet syftar bland annat till att utveckla metoder som kan förbättra planeringsprocessen. Syftet med den pågående studie som delredovisas här, är att fördjupa förståelsen av hur planeringsprocessen går till. Mer specifik syftar projektet till att förstå hur yrkesverksamma planerare i kommunala organisationer upplever att de hanterar all den input som medborgare lämnar i samband med medborgardialoger av olika slag.

    Resultatet visar att de sorteringsprocesser, vars kommuner varit exempel i denna undersökning, beskrivs som;

    • påverkade av huruvida medborgardeltagandet sker i samband med tidig medborgardialog, samråd, översiktsplan eller detaljplan
    • i behov av en översättning
    • stegvisa och tidskrävande
    • konstruerade i förhållande till någonting (lagstiftning, vanor, andra kommuner...)

    En central slutsats är att det inte verkar finnas en ”statisk”, allmängiltig beskrivning av den sortering som undersökts i denna studie. Sorteringsprocessens flerdimensionella karaktär innebär följaktligen att det finns ett behov av flexibilitet när det kommer till att skildra hur kommunens representanter ser på sortering och värdering i samhällsbyggnadsprocesser.

  • Public defence: 2019-11-08 13:00 Berzeliussalen, Linköping
    Lindblom, Hanna
    Linköping University, Department of Medical and Health Sciences, Division of Physiotherapy. Linköping University, Faculty of Medicine and Health Sciences.
    Injury Prevention in Youth Football Players: Training Effects and Programme Implementation2019Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Background With 17–35% of all 14-year-olds in Sweden being active in football, injuries do occur, most frequently during match play. Based on knowledge of injury mechanisms and risk factors, different injury prevention exercise programmes (IPEPs) have been developed. In this thesis, the Swedish IPEP Knee Control was used as a model for injury preventive training.

    Aim The overall aim of this thesis was to improve our understanding of the effects of the Knee Control injury prevention exercise programme on sports performance and jump-landing technique, as well as exploring programme implementation and coach experiences of using the programme in youth football.

    Methods Studies I and IV were cluster-randomised trials focusing on the performance effects of Knee Control. Study I included four teams with 41 female youth football players (mean age 14). The intervention group used Knee Control twice weekly for 11 weeks, whereas the control group teams did their usual training. Knee Control includes six different exercises at four levels of difficulty and with partner exercises and is meant to be used during warm-up at every training session. Performance was tested using a battery of balance, agility, jump and sprint tests at baseline and follow-up at an indoor venue. Study IV had a similar set-up but included two different interventions: Knee Control and a new, further-developed version of the programme, Knee Control+, which were studied during an eight-week intervention involving eight youth football teams, four male, four female (mean age 14), with 77 players. Similar, but not identical, performance tests were used in Study IV, along with drop vertical jumps and tuck jump assessment to assess jump-landing technique.

    Studies II and III focused on the implementation context. Study II was questionnaire based, using the RE-AIM framework covering the reach, effectiveness, adoption, implementation and maintenance of Knee Control. Coaches for female youth teams (n=352), one representative of the national football association and representatives of eight district football associations responded to web-based questionnaires. Data collection was performed two years after the nation-wide implementation of Knee Control started. Study III was a qualitative study that followed up on the results of Study II. Interviews were conducted with 20 coaches for female football teams and analysed using qualitative content analysis. The interviews focused on factors that affected the adoption and use of Knee Control. All 20 coaches had experience of Knee Control.

    Results Limited positive effects were seen on jump-landing technique in girls, with the total tuck jump assessment score improving, as well as two separate criteria, the number of jumps accomplished during the 10-second test and additionally an increased knee-flexion angle upon landing from a drop vertical jump. No improvements on the performance tests were found in either Study I or Study IV. Both studies, however, suffered from low player compliance with the IPEPs and as a result low training dosage. No major differences in results were seen between Knee Control and Knee Control+ in Study IV.

    Study II showed that 91% of the responding coaches were familiar with Knee Control, they perceived the programme to be effective, 74% had started to use it, and it was fairly well maintained over time. However, only one third of the coaches used the programme every week and few used the whole programme. There were no formal policies for programme implementation and use in the district football associations and clubs. Study III showed that the coach was vital for programme use but needed social support, buy-in from players, resources and a feasible programme to facilitate programme adoption and use. When facing challenges with Knee Control implementation and use, the coaches did their best to work around these obstacles; for example, by modifying the programme content or dosage.

    Conclusions In conclusion, limited positive effects on jump-landing technique were seen in girls, potentially affecting risk factors for injury positively. No clinically meaningful effects from Knee Control or Knee Control+ were seen on performance tests as measured in the studies in either boys or girls. This may be related to the low training dosage. The high programme reach, perceived effectiveness, adoption and fairly high maintenance of Knee Control were positive. The modifications of programme content and/or dosage were concerning but will hopefully decrease with a more user-friendly programme.

    List of papers
    1. No effect on performance tests from a neuromuscular warm-up programme in youth female football: a randomised controlled trial
    Open this publication in new window or tab >>No effect on performance tests from a neuromuscular warm-up programme in youth female football: a randomised controlled trial
    2012 (English)In: Knee Surgery, Sports Traumatology, Arthroscopy, ISSN 0942-2056, E-ISSN 1433-7347, Vol. 20, no 10, p. 2116-2123Article in journal (Refereed) Published
    Abstract [en]

    The objective of the present randomised controlled trial was to study the effect of a neuromuscular warm-up programme on performance tests in youth female football. less thanbrgreater than less thanbrgreater thanFour youth female football teams with players aged 12-16 years were randomised into an intervention group and control group. The intervention was a 15-min neuromuscular warm-up programme carried out twice a week during the 11-week study period. Baseline and follow-up measurements of performance were made indoors and included the star excursion balance test, a countermovement jump test, a triple-hop for distance test, a modified Illinois agility test, and 10- and 20-m sprint tests. less thanbrgreater than less thanbrgreater thanFifty-two players (intervention 28; control 24) took part in baseline measurements, and after dropout, 41 players (intervention 23; control 18) were included for analysis. Minor positive changes were seen in the control group compared to the intervention group for a sub-score of the star excursion balance test (P andlt; 0.05) and in the modified Illinois agility test (P andlt; 0.05). No improvement was seen in the intervention group from baseline to follow-up. less thanbrgreater than less thanbrgreater thanThe study showed that a neuromuscular warm-up programme carried out during 11 weeks did not improve performance in youth female football. This could indicate that the programme does not contain sufficient stimulus to improve performance. A low player attendance at training sessions, and low specificity between exercises in the warm-up programme and the evaluated performance tests may also contribute to the lack of effect. less thanbrgreater than less thanbrgreater thanI.

    Place, publisher, year, edition, pages
    Springer Verlag (Germany), 2012
    Keywords
    Adolescent, Knee, Injuries, Prevention, Soccer
    National Category
    Medical and Health Sciences
    Identifiers
    urn:nbn:se:liu:diva-84893 (URN)10.1007/s00167-011-1846-9 (DOI)000308968500033 ()
    Note

    Funding Agencies|Swedish Football Association||Swedish National Centre for Research in Sports||

    Available from: 2012-10-26 Created: 2012-10-26 Last updated: 2019-10-08
    2. Implementation of a neuromuscular training programme in female adolescent football: 3-year follow-up study after a randomised controlled trial
    Open this publication in new window or tab >>Implementation of a neuromuscular training programme in female adolescent football: 3-year follow-up study after a randomised controlled trial
    2014 (English)In: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 48, no 19, p. 1425-1430Article in journal (Refereed) Published
    Abstract [en]

    BACKGROUND: Neuromuscular training (NMT) has been shown to reduce anterior cruciate ligament injury rates in highly structured clinical trials. However, there is a paucity of studies that evaluate implementation of NMT programmes in sports.

    AIM: To evaluate the implementation of an NMT programme in female adolescent football 3 years after a randomised controlled trial (RCT).

    METHODS: Cross-sectional follow-up after an RCT using the Reach, Effectiveness, Adoption, Implementation, and Maintenance Sports Setting Matrix (RE-AIM SSM) framework. Questionnaires were sent to the Swedish Football Association (FA), to eight district FAs and coaches (n=303) that participated in the RCT in 2009, and coaches who did not participate in the RCT but were coaching female adolescent football teams during the 2012 season (n=496).

    RESULTS: Response rates were 100% among the FAs, 57% among trial coaches and 36% among currently active coaches. The reach of the intervention was high, 99% of trial coaches (control group) and 91% of current coaches were familiar with the programme. The adoption rate was 74% among current coaches, but programme modifications were common among coaches. No district FA had formal policies regarding implementation, and 87% of current coaches reported no club routines for programme use. Maintenance was fairly high; 82% of trial coaches from the intervention group and 68% from the control group still used the programme.

    CONCLUSIONS: Reach and adoption of the programme was high among coaches. However, this study identified low programme fidelity and lack of formal policies for its implementation and use in clubs and district FAs.

    Place, publisher, year, edition, pages
    B M J Group, 2014
    Keywords
    ACL; Adolescents; Implementation; Injury Prevention; Soccer
    National Category
    Clinical Medicine
    Identifiers
    urn:nbn:se:liu:diva-110380 (URN)10.1136/bjsports-2013-093298 (DOI)000341947200008 ()24850618 (PubMedID)
    Available from: 2014-09-09 Created: 2014-09-09 Last updated: 2019-10-08
    3. Adoption and use of an injury prevention exercise program in female football: A qualitative study among coaches
    Open this publication in new window or tab >>Adoption and use of an injury prevention exercise program in female football: A qualitative study among coaches
    2018 (English)In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 28, no 3, p. 1295-1303Article in journal (Refereed) Published
    Abstract [en]

    This study focuses on an injury prevention exercise program (IPEP), Knee Control, which has been shown to reduce the incidence of acute knee injury in female adolescent football players. The aim was to explore the factors influencing coaches adoption and use of Knee Control within female football in Sweden. This was a qualitative study involving interviews with 20 strategically selected coaches for female football teams, predominantly adolescent teams. The semi-structured interview guide was influenced by the Health Belief Model, and an ecological perspective was adopted during the interviews. Interviews were analyzed with qualitative content analysis. The results illustrate the different influences that interact on adoption and use of Knee Control by coaches. The coaches described themselves as crucial for Knee Control adoption and use, but external facilitators and barriers such as resources for training, social support from other coaches, clubs and football associations and player buy-in were also described as important. Knee Control characteristics, such as how well the program fit the team, also influenced use of Knee Control. Many coaches modified the program to improve player buy-in and Knee Control fit. Such modifications may risk compromising the preventive effect but may increase feasibility, that is the ease of using Knee Control, and thereby long-term use. These findings may guide the design and delivery of future IPEPs, and improve use of Knee Control, for example, by expanding the program to fit different target groups and supporting coaches and players in the use of Knee Control.

    Place, publisher, year, edition, pages
    Wiley-VCH Verlagsgesellschaft, 2018
    Keywords
    dissemination; implementation; neuromuscular training; team sports; youth
    National Category
    Sport and Fitness Sciences
    Identifiers
    urn:nbn:se:liu:diva-147150 (URN)10.1111/sms.13012 (DOI)000426529300058 ()29130536 (PubMedID)
    Note

    Funding Agencies|Swedish Research Council for Sport Science; Region Ostergotland

    Available from: 2018-04-20 Created: 2018-04-20 Last updated: 2019-10-08
    4. Limited positive effects on jump-landing technique in girls but not in boys after 8 weeks of injury prevention exercise training in youth football
    Open this publication in new window or tab >>Limited positive effects on jump-landing technique in girls but not in boys after 8 weeks of injury prevention exercise training in youth football
    2019 (English)In: Knee Surgery, Sports Traumatology, Arthroscopy, ISSN 0942-2056, E-ISSN 1433-7347Article in journal (Refereed) Epub ahead of print
    Abstract [en]

    PURPOSE: To evaluate changes in jump-landing technique in football-playing boys and girls after 8 weeks of injury prevention training.

    METHODS: Four boys' and four girls' teams (mean age 14.1 ± 0.8 years) were instructed to use either the original Knee Control injury prevention exercise programme (IPEP) or a further developed IPEP, Knee Control + , at every training session for 8 weeks. Baseline and follow-up testing of jump-landing technique included drop vertical jumps (DVJ), assessed subjectively and with two-dimensional movement analysis, and tuck jump assessment (TJA).

    RESULTS: Only minor differences in intervention effects were seen between the two IPEPs, and results are therefore presented for both intervention groups combined. At baseline 30% of the boys showed good knee control during the DVJ, normalised knee separation distances of 77-96% (versus hip) and a median of 3 flaws during the TJA. Among girls, 22% showed good knee control, normalised knee separation distances of 67-86% and a median of 4 flaws during the TJA. At follow-up, boys and girls performed significantly more jumps during TJA. No changes in jump-landing technique were seen in boys, whereas girls improved their knee flexion angle at initial contact in the DVJ (mean change + 4.7°, p < 0.001, 95% CI 2.36-6.99, d = 0.7) and their TJA total score (- 1 point, p = 0.045, r = - 0.4).

    CONCLUSION: The study showed small positive effects on jump-landing technique in girls, but not in boys, after 8 weeks of injury prevention training.

    LEVEL OF EVIDENCE: Level II.

    TRIAL REGISTRATION: Clinical Trials gov identifier: NCT03251404.

    Keywords
    Effect mechanisms, Movement quality, Neuromuscular training
    National Category
    Sport and Fitness Sciences
    Identifiers
    urn:nbn:se:liu:diva-160777 (URN)10.1007/s00167-019-05721-x (DOI)31541293 (PubMedID)
    Available from: 2019-10-07 Created: 2019-10-07 Last updated: 2019-10-08
  • Håkansson, Irene
    Linköping University, Department of Clinical and Experimental Medicine, Division of Neuro and Inflammation Science. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Local Health Care Services in Central Östergötland, Department of Neurology in Linköping.
    Biomarkers and Disease Activity in Multiple Sclerosis: A cohort study on patients with clinically isolated syndrome and relapsing remitting multiple sclerosis2019Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis focuses on disease activity in clinically isolated syndrome (CIS) and newly diagnosed relapsing remitting multiple sclerosis (RRMS). The papers are based on data from 41 patients in a prospective longitudinal cohort study. All patients were untreated at baseline. Age- and sex-matched healthy controls (n=22) for blood and cerebrospinal fluid (CSF) samples were recruited from blood donors.

    Paper I evaluated the prognostic value of baseline levels of CXCL1, CXCL8, CXCL10, CXCL13, CCL22, neurofilament light chain (NFL), neurofilament heavy chain, glial fibrillary acidic protein, chitinase-3-like-1 (CHI3L1), matrix metalloproteinase-9 (MMP-9) and osteopontin in CSF in relation to disease activity during the first two years of follow-up. Disease activity was defined as clinical relapses, new T2 lesions in brain magnetic resonance imaging (MRI) and/or sustained Expanded Disability Status Scale (EDSS) progression. Absence of these three signs of disease activity was called no evidence of disease activity (NEDA-3). Logistic regression analysis showed that NFL in CSF was the best predictive marker of disease activity and correctly classified 93% of the patients with evidence of disease activity during two years of follow-up and 67% of those without.

    Paper II presented four year follow-up data from the cohort and also included brain volume data as well as serum levels of NFL. The correlation between NFL in CSF and serum was fairly strong (r=0.74, p<0.001). NFL in CSF was associated with new T2 lesions as well as with brain volume loss, whereas CHI3L1 in CSF was associated mainly with brain volume loss and CXCL1, CXCL10, CXCL13, CCL22 and MMP-9 in CSF were mainly associated with new T2 lesions. Taken together, paper I and II confirm and extend the knowledge of NFL as a useful biomarker in CIS and RRMS and suggests that NFL, rather than total brain volume loss, could be included in an expanded NEDA concept and used in clinical monitoring of disease activity/treatment effect. Although serum levels of NFL were correlated with the corresponding CSF levels, CSF-NFL showed a stronger association to subsequent disease activity (NEDA-3).

    Paper III addressed the patients´ self-reported Modified Fatigue Impact Scale (MFIS) scores in relation to other cohort study data. MFIS scores correlated with other self-assessment questionnaire data (Hospital Anxiety and Depression scale (HAD), Multiple Sclerosis Impact Scale 29 (MSIS-29) and Short Form 36 (SF-36) scores (Spearman´s rho 0.45-0.78, all p≤0.01)) but not with EDSS ratings, number of T2 lesions, total brain volume or NFL levels, indicating that subjective fatigue scores are not well reflected by some commonly used and objectively measurable disease parameters.

    Paper IV focused on the complement factors C1q, C3, C3a and sC5b-9 in CSF and plasma. CSFC1q was significantly higher in patients than in controls at baseline. The subgroup of patients with ongoing relapse at baseline also had higher levels of CSF-C3a than controls. Baseline levels of CSF-C1q and CSF-C3a correlated significantly with several pro-inflammatory chemokines as well as with MMP-9, CHI3L1 and NFL in CSF. Baseline CSF-C3a also correlated significantly with the number of T2 lesions and Gadolinium enhancing lesions in brain MRI at baseline, as well as with the number of new T2 lesions during follow-up. This study indicates that the complement system is involved already at early stages of MS. It also suggests that especially CSF-C1q and CSF-C3a levels are associated with other neuroinflammatory and neurodegenerative markers and that CSF-C3a levels may carry some prognostic information.

    List of papers
    1. Neurofilament light chain in cerebrospinal fluid and prediction of disease activity in clinically isolated syndrome and relapsing-remitting multiple sclerosis
    Open this publication in new window or tab >>Neurofilament light chain in cerebrospinal fluid and prediction of disease activity in clinically isolated syndrome and relapsing-remitting multiple sclerosis
    Show others...
    2017 (English)In: European Journal of Neurology, ISSN 1351-5101, E-ISSN 1468-1331, Vol. 24, no 5, p. 703-712Article in journal (Refereed) Published
    Abstract [en]

    Background and purpose: Improved biomarkers are needed to facilitate clinical decision-making and as surrogate endpoints in clinical trials in multiple sclerosis (MS). We assessed whether neurodegenerative and neuroinflammatory markers in cerebrospinal fluid (CSF) at initial sampling could predict disease activity during 2 years of follow-up in patients with clinically isolated syndrome (CIS) and relapsing-remitting MS. Methods: Using multiplex bead array and enzyme-linked immunosorbent assay, CXCL1, CXCL8, CXCL10, CXCL13, CCL20, CCL22, neurofilament light chain (NFL), neurofilament heavy chain, glial fibrillary acidic protein, chitinase-3-like-1, matrix metalloproteinase-9 and osteopontin were analysed in CSF from 41 patients with CIS or relapsing-remitting MS and 22 healthy controls. Disease activity (relapses, magnetic resonance imaging activity or disability worsening) in patients was recorded during 2 years of follow-up in this prospective longitudinal cohort study. Results: In a logistic regression analysis model, NFL in CSF at baseline emerged as the best predictive marker, correctly classifying 93% of patients who showed evidence of disease activity during 2 years of follow-up and 67% of patients who did not, with an overall proportion of 85% (33 of 39 patients) correctly classified. Combining NFL with either neurofilament heavy chain or osteopontin resulted in 87% overall correctly classified patients, whereas combining NFL with a chemokine did not improve results. Conclusions: This study demonstrates the potential prognostic value of NFL in baseline CSF in CIS and relapsing-remitting MS and supports its use as a predictive biomarker of disease activity.

    Place, publisher, year, edition, pages
    WILEY, 2017
    Keywords
    biomarker; clinically isolated syndrome; disease activity; multiple sclerosis; neurofilament light chain
    National Category
    Neurology
    Identifiers
    urn:nbn:se:liu:diva-137379 (URN)10.1111/ene.13274 (DOI)000399704400010 ()28261960 (PubMedID)
    Note

    Funding Agencies|Swedish Research Council [K2013-61X-22310-01-4]; Linkoping University, Sweden; University Hospital Linkoping, Sweden; Novartis; Torsten Soderberg foundation; Royal Academy of Sciences, Sweden

    Available from: 2017-05-18 Created: 2017-05-18 Last updated: 2019-10-07
    2. Neurofilament levels, disease activity and brain volume during follow-up in multiple sclerosis
    Open this publication in new window or tab >>Neurofilament levels, disease activity and brain volume during follow-up in multiple sclerosis
    Show others...
    2018 (English)In: Journal of Neuroinflammation, ISSN 1742-2094, E-ISSN 1742-2094, Vol. 15, article id 209Article in journal (Refereed) Published
    Abstract [en]

    Background: There is a need for clinically useful biomarkers of disease activity in clinically isolated syndrome (CIS) and relapsing remitting MS (RRMS). The aim of this study was to assess the correlation between neurofilament light chain (NFL) in cerebrospinal fluid (CSF) and serum and the relationship between NFL and other biomarkers, subsequent disease activity, and brain volume loss in CIS and RRMS. Methods: A panel of neurodegenerative and neuroinflammatory markers were analyzed in repeated CSF samples from 41 patients with CIS or RRMS in a prospective longitudinal cohort study and from 22 healthy controls. NFL in serum was analyzed using a single-molecule array (Simoa) method. "No evidence of disease activity-3" (NEDA-3) status and brain volume (brain parenchymal fraction calculated using SyMRI (R)) were recorded during 4 years of follow-up. Results: NFL levels in CSF and serum correlated significantly (all samples, n = 63, r 0.74, p amp;lt; 0.001), but CSF-NFL showed an overall stronger association profile with NEDA-3 status, new T2 lesions, and brain volume loss. CSF-NFL was associated with both new T2 lesions and brain volume loss during follow-up, whereas CSF-CHI3L1 was associated mainly with brain volume loss and CXCL1, CXCL10, CXCL13, CCL22, and MMP-9 were associated mainly with new T2 lesions. Conclusions: Serum and CSF levels of NFL correlate, but CSF-NFL predicts and reflects disease activity better than S-NFL. CSF-NFL levels are associated with both new T2 lesions and brain volume loss. Our findings further add to the accumulating evidence that CSF-NFL is a clinically useful biomarker in CIS and RRMS and should be considered in the expanding NEDA concept. CSF-CXCL10 and CSF-CSF-CHI3L1 are potential markers of disease activity and brain volume loss, respectively.

    Place, publisher, year, edition, pages
    BMC, 2018
    Keywords
    Multiple sclerosis; Clinically isolated syndrome; Disease activity; Neurofilament light chain; CHI3L1; CXCL10; Brain volume
    National Category
    Neurology
    Identifiers
    urn:nbn:se:liu:diva-150263 (URN)10.1186/s12974-018-1249-7 (DOI)000439133500001 ()30021640 (PubMedID)
    Note

    Funding Agencies|Swedish Research Council [K2013-61X-22310-01-4]; Linkoping University; University Hospital of Linkoping, Sweden; Novartis; Torsten Soderberg Foundation; Royal Academy of Sciences, Sweden

    Available from: 2018-08-17 Created: 2018-08-17 Last updated: 2019-10-07
  • Landin, Tore
    et al.
    Linköping University, Department of Management and Engineering, Machine Design.
    Nilsson, Jesper
    Linköping University, Department of Management and Engineering, Machine Design.
    Förbättring av sidostabilitet på såbill2019Independent thesis Basic level (university diploma), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    This report presents the work on improving the lateral stability of the seed coulters of Väderstad seed drill model Spirit. The work lasted ten weeks and was carried out at Väderstad AB spring 2019. The basic problem was analyzed with a number of different methods, and tests were carried out both in the field and in the test rig. With the results from these, it was found that the suspension of the seed coulters allowed both torsional and lateral movements at low loads. 

     The work started with a root cause analysis which was then used to produce a requirement specification. This was then used to develop concepts. After evaluation, the best concepts were selected, analyzed, modeled and calculated. When the concepts were deemed to be sufficiently functional, several manufacturing analyses were made to assess the suitability for serial production. 

     Three concepts were developed. One is a final concept that can be mounted directly on existing machines in the form of injection-molded plastic blocks on the seed coulters. One is a concept for future year models were flanges are mounted on the fall of the seed coulters. This concept is available in two parts, either in the form of a welded steel profile or as part of a sand cast reconstruction of the seed coulters. The third and final concept is a reconstruction of the machine's seed coulters with a spring to control the bill pressure. In addition, a method for evaluating the side stability of the seed coulters has been developed. 

     The reason for the Nordic model's problems is that the seed coulters tend to track the grooves of the fertilizer carriers. This can be solved by having the seed coulters support each other in the lateral direction. 

     As a continued work, a more thorough examination of the sand cast flange concept is recommended. This is in line with Väderstad's philosophy of making built to last products. 

  • Augustsson, Jenny
    et al.
    Linköping University, Department of Clinical and Experimental Medicine.
    Nelsson, Emma
    Linköping University, Department of Clinical and Experimental Medicine.
    Föräldrars separation under småbarnsfasen: en studie om BVC-sjuksköterskors uppfattningom prevention av separation2019Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this study is to examine the possibilities for Swedish Child Healthcare Centers to prevent parents separating as a consequence of transitioning from being a couple to having a child and becoming parents. The current study describes Child Health Care nurses’ opinions on preventing parents with small children from separating, as well as these nurses’ opinions on their possibilities to work with the parents on their relationships. The study is a quantitative questionnaire study answered by Child Health Care nurses working in public healthcare in Region Östergötland or in private facilities contracted by Region Östergötland. 99 questionnaires were handed out in total, and the answer frequency was 83 %. The results show that Child Health Care nurses feel it is possible for them to prevent parents with small children from separating, that flaws in the parents’ relationships are rarely detected at the Child Health Care Centers, and that many Child Health Care nurses don’t feel they have any possibilities to work on this issue. The conclusion is that Child Health Care Centers are in need of a clear description of their task, and whether or not this includes working with parents’ relationships; and if it does, how the centers can attain the necessary prerequisites for carrying out this task.

  • Hjort, Erik
    Linköping University, Department of Clinical and Experimental Medicine, Center for Social and Affective Neuroscience.
    Att arbeta med det större systemet: Feedback-informerad terapi och nätverksterapi inom socialtjänsten2019Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this paper is to investigate Feedback-Informed Therapy (FIT) (Miller & Bertolino, 2015) in the form of the Outcome Rating Scale (ORS) and Group Session Rating Scale (GSRS) scales when used in network therapy within the social services. The study is quantitative and is based on collected ORS and GSRS forms from 10 network therapies, including 94 people. The material is collected by network teams in four municipalities in Sweden; Norrköping, Enköping, Gothenburg and Botkyrka. The protagonists have completed an ORS on three occasions during the treatment period; before, during and after. The closest relatives, mainly parents, have made parallel estimates on the same occasions. In each network therapy, a network meeting and a follow-up network meeting have been held. All participants have completed a GSRS after the meetings. Of the study participants, 38% estimated a Clinical Significant Change in ORS after the network therapy. 50% estimated a positive change that did not exceed the limit of clinical significance. 12% estimated a small deterioration. In the cases of a Clinically Significant Change or major change, the meeting participants at the network meetings have estimated high on the GSRS (36.5 in the first meeting and 37.1 in the second meeting. In those cases with a small positive change or decrease, the participants have estimated lower on the GSRS (33.5 in first and 31.8 in others). The results indicate that network therapy gives a good effect if measured with ORS and that this effect appears early in the treatment. The study also indicates that the limit value for GSRS does not appear to be lower in Network Therapy than in other group therapy. Furthermore, the study points out that the network therapies that have network meetings with balance from the different sectors in the protagonist's life provide the best results both on the GRSR and ORS.

  • Holm, Lena
    et al.
    Linköping University, Department of Clinical and Experimental Medicine.
    Norgren, Åsa
    Linköping University, Department of Clinical and Experimental Medicine.
    "Familjer vill ju inget annat än att ha dialog med varandra": Möjligheter och hinder för familjeterapi förr och nu - erfarna terapeuters syn2019Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Ett syfte med denna kvalitativa studie var att undersöka erfarna familjeterapeuters syn på hinder och möjligheter för familjeterapins tillgänglighet i Sverige från 1970-tal till nutid. Ett annat syfte var att undersöka erfarna familjeterapeuters syn på familjers attityder till familjeterapi över tid. Sju erfarna psykoterapeuter med inriktning familj- och system samt även handledarutbildning intervjuades med hjälp av semistrukturerade frågor.

     

    När det gäller frågan om hur utvecklingen sett ut vad gäller hinder och möjligheter för familjeterapin i Sverige har den ett komplext svar. Det som tycks tydligt är att familjeterapins utveckling är kontextberoende, det omgivande samhället har stor påverkan. Detta belyses genom att som teoretisk grund använda Bronfennbrenners utvecklingsekologiska system som har arbetats fram till sex intervjuteman; Samhällets förändring, Från kollektiv till individ, Forskning, evidens och Socialstyrelsen, Familjeterapins utveckling, familjens förändring över tid samt Familjeterapi och tydlighet. Den rådande samhällssynen på människan påverkar den politiska styrningen vilket har betydelse för vilket utrymme familjeterapin lyckas ta eller inte.

     

    Familjers attityder till familjeterapi handlar om, förutom det omgivande samhällets påverkan, även om familjeterapeuters attityder till familjer. Familjers attityder påverkas också av hur familjeterapeuter tydliggör familjeterapi.

     

  • Baumgartner, Johanna
    et al.
    Linköping University, Department of Physics, Chemistry and Biology. Linköping University, Faculty of Science & Engineering.
    Jönsson, Jan-Ingvar
    Linköping University, Faculty of Medicine and Health Sciences. Linköping University, Department of Clinical and Experimental Medicine, Division of Hematopoiesis and Developmental Biology.
    Jager, Edwin W. H.
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Switchable presentation of cytokines on electroactive polypyrrole surfaces for hematopoietic stem and progenitor cells2018In: Journal of Materials Chemistry B, ISSN 2050-750X, Vol. 6, p. 4665-4675Article in journal (Refereed)
    Abstract [en]

    Hematopoietic stem cells are used in transplantations for patients with hematologic malignancies. Scarce sources require efficient strategies of expansion, including polymeric biomaterials mimicking architectures of bone marrow tissue. Tissue microenvironment and mode of cytokine presentation strongly influence cell fate. Although several cytokines with different functions as soluble or membrane-bound mediators have already been identified, their precise roles have not yet been clarified. A need exists for in vitro systems that mimic the in vivo situation to enable such studies. One way is to establish surfaces mimicking physiological presentation using protein-immobilization onto polymer films. However these films merely provide a static presentation of the immobilized proteins. It would be advantageous to also dynamically change protein presentation and functionality to better reflect the in vivo conditions. The electroactive polymer polypyrrole shows excellent biocompatibility and electrochemically alters its surface properties, becoming an interesting choice for such setups. Here, we present an in vitro system for switchable presentation of membrane-bound cytokines. We use interleukin IL-3, known to affect hematopoiesis, and show that when immobilized on polypyrrole films, IL-3 is bioavailable for the bone marrow-derived FDC-P1 progenitor cell line. Moreover, IL-3 presentation can be successfully altered by changing the redox state of the film, in turn influencing FDC-P1 cell viability. This novel in vitro system provides a valuable tool for stimuli-responsive switchable protein presentation allowing the dissection of relevant mediators in stem and progenitor cell behavior.

  • Norén, Karl
    Linköping University, Department of Computer and Information Science, Software and Systems.
    Obstacle Avoidance for an Autonomous Robot Car using Deep Learning2019Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    The focus of this study was deep learning. A small, autonomous robot car was used for obstacle avoidance experiments. The robot car used a camera for taking images of its surroundings. A convolutional neural network used the images for obstacle detection. The available dataset of 31 022 images was trained with the Xception model. We compared two different implementations for making the robot car avoid obstacles. Mapping image classes to steering commands was used as a reference implementation. The main implementation of this study was to separate obstacle detection and steering logic in different modules. The former reached an obstacle avoidance ratio of 80 %, the latter reached 88 %. Different hyperparameters were looked at during training. We found that frozen layers and number of epochs were important to optimize. Weights were loaded from ImageNet before training. Frozen layers decided how many layers that were trainable after that. Training all layers (no frozen layers) was proven to work best. Number of epochs decided how many epochs a model trained. We found that it was important to train between 10-25 epochs. The best model used no frozen layers and trained for 21 epochs. It reached a test accuracy of 85.2 %.

  • Keevallik, Leelo
    Linköping University, Department of Culture and Communication, Language and Literature. Linköping University, Faculty of Arts and Sciences.
    The temporal organization of conversation while mucking out a sheep stable2018In: Time in Embodied Interaction: Synchronicity and sequentiality of multimodal resources / [ed] Arnulf Deppermann, Jürgen Streeck, Amsterdam/Philadelphia: John Benjamins Publishing Company, 2018, p. 97-122Chapter in book (Refereed)
    Abstract [en]

    Based on talk-oriented activities, there seems to be a consensus that turn-taking is organized to minimize gaps between turns. This study looks at a conversational sequence that evolved in a multi-party setting during a joint cleaning of a sheep stable, and analyzes how nextness is accomplished in a nonproblematic manner after extensive silences. It argues that due to the non-cognitive but physically straining nature of the activity in a confined space, chatting is almost constant but response relevance is reduced. It discusses the moral orders of talk and work in this multiactivity setting, where urgency is not an issue, and suggests that data collection for sequence analysis be more attentive to the systematic differences between talk-oriented and other settings.

  • Keevallik, Leelo
    Linköping University, Department of Culture and Communication, Language and Literature. Linköping University, Faculty of Arts and Sciences.
    Making up one’s mind in second position: Estonian no-preface in action plans2018In: Between Turn and Sequence: Turn-initial particles across languages / [ed] John Heritage, Marja-Leena Sorjonen, Amsterdam, Philadelphia: John Benjamins Publishing Company, 2018, p. 315-338Chapter in book (Refereed)
    Abstract [en]

    This chapter discusses preferred responses that are delayed by the initial particle no in Estonian. It demonstrates that the turn-initial time-space may be employed for a display of “making up one’s mind”, either weighing matters outside the conversation or something already discussed in the talk. The paper argues that besides the dichotomous choice between the preferred and the dispreferred answer format, there are individual contingencies to consider in committing to future actions as made relevant in requests, proposals and suggestions. The particle no prefaces preferred second actions that are associated with high contingency for the concerned parties, or are framed as such. Examples of high contingency include receiving a guest, attending a potentially unpleasant meeting, and faking a signature. The no-prefacing pattern is valid across response types, from partial to full repeats and independently formatted responses which reflect other social dimensions of talk-in-interaction, such as independent agency, commitment, and degree of assent/confirmation. By marking a transition from prior resistance to current compliance with a no-preface, the speaker makes salient that she is currently considering whether to proceed to a complying or non-complying answer, as well as indexes a more global transition between these two standpoints. The resulting turn gives an appearance of a carefully considered and therefore socially cohesive response.

  • Trygger, Maria
    Linköping University, Department of Behavioural Sciences and Learning. Linköping University, Faculty of Educational Sciences.
    Do I feel included? A study of Secondary Pupils’ Perception of Inclusion in a Compulsory School in Sweden: With a particular focus on pupils with self-reported special education needs2019Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    For a long time, inclusion or inclusive education (IE) has been high on the agenda both internationally and in Sweden, not least since the signing of the Salamanca Declaration in 1994 and the ratification of the United Nations Convention on the Rights of Persons with Disabilities in 2006. These call for inclusion to be the norm and are guided by the principle that all pupils, regardless of needs, feel that their social, emotional and academic needs are being met. Since the introduction of Lgr11 (2011), the most recent Swedish curriculum, special educational needs (SEN) should be seen as arising out of educational environments and methods that are not adapted enough to be accessible to a wide diversity of pupils. Despite a significant body of research into inclusive education, several researchers raised that few studies focused on the pupil perspective, few were collaborative and few focused on all pupils, that is to say, their focus lies only on pupils with SEN. Arguably, selecting certain groups to investigate goes against the ethos of inclusion and risks missing information from pupils experiencing difficulties that are not yet identified.  When considering factors impacting feelings of inclusion, many studies have raised the importance of socio-emotional functioning alongside academic self-concept. This collaborative study looks at how included pupils in a free school in Stockholm feel, with a focus on whether there is a difference between the pupils’ perception of inclusion depending on whether they have self-reported SEN or not, what grade they are in and their gender. This is measured using a new instrument, the ‘Perception of Inclusion Questionnaire (PIQ) - student version’, which is also being validated as a tool for measuring inclusion in Sweden. Results indicate clearly that pupils with SEN feel significantly less included than their typically-developing peers across all three scales, emotional inclusion, social inclusion and academic self-concept. In addition, grade has an impact, with pupils in Grade 8 having lower feelings of emotional inclusion, social inclusion and academic self-concept than in Grade 5. This difference was apparent for all pupils but the effect was greater in pupils with SEN. Gender returned insignificant results on all three scales. Another interesting result is that more pupils self-report actual or suspected SEN than the school reports, indicating that there are a number of pupils with difficulties who would be overlooked in studies that do not include all pupils. The Swedish version of the PIQ for Students has been validated.

  • Granli, Petter
    Linköping University, Department of Computer and Information Science, Software and Systems.
    Semantic segmentation of seabed sonar imagery using deep learning2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    For investigating the large parts of the ocean which have yet to be mapped, there is a need for autonomous underwater vehicles. Current state-of-the-art underwater positioning often relies on external data from other vessels or beacons. Processing seabed image data could potentially improve autonomy for underwater vehicles.

    In this thesis, image data from a synthetic aperture sonar (SAS) was manually segmented into two classes: sand and gravel. Two different convolutional neural networks (CNN) were trained using different loss functions, and the results were examined. The best performing network, U-Net trained with the IoU loss function, achieved dice coefficient and IoU scores of 0.645 and 0.476, respectively. It was concluded that CNNs are a viable approach for segmenting SAS image data, but there is much room for improvement.

  • Karlsson, Elin
    et al.
    Linköping University, Department of Medical and Health Sciences, Division of Community Medicine. Linköping University, Faculty of Medicine and Health Sciences.
    Sandqvist, Jan
    Linköping University, Department of Social and Welfare Studies, Division of Occupational Therapy. Linköping University, Faculty of Medicine and Health Sciences.
    Seing, Ida
    Linköping University, Department of Behavioural Sciences and Learning, Education and Sociology. Linköping University, Faculty of Arts and Sciences.
    Ståhl, Christian
    Linköping University, Department of Behavioural Sciences and Learning, Education and Sociology. Linköping University, HELIX Competence Centre. Linköping University, Faculty of Medicine and Health Sciences.
    Social validitet för försäkringsmedicinska utredningar och påföljande myndighetsbeslut inom sjukförsäkringen2019Report (Other academic)
    Abstract [sv]

    Bakgrund: I det svenska sjukförsäkringssystemet utförs försäkringsmedicinska utredningar av särskilda enheter inom hälso- och sjukvården på uppdrag av Försäkringskassan. Dessa utredningar ligger sedan till grund för handläggares beslut om sjukskrivnas rätt till sjukpenning. Studier av social validitet är ännu ovanliga inom försäkringsmedicin och folkhälsa men kan bidra med kunskap om vad som främjar eller hindrar att metoder uppfattas som godtagbara, begripliga och betydelsefulla.

    Syfte: Att utforska sjukskrivna personers upplevelse av social validitet för försäkringsmedicinska utredningar och påföljande myndighetsbeslut avseende sjukpenning inom sjukförsäkringen.

    Metod: Detta var en kvalitativ longitudinell studie baserad på telefonintervjuer med 30 sjukskrivna som varit på en försäkringsmedicinsk utredning, samt delvis deras akter från Försäkringskassan. En deduktiv innehållsanalys användes.

    Resultat: Sjukskrivnas förståelse för utredningen var beroende av huruvida de specifika testerna var tydligt relaterade till personernas svårigheter eller ej och vilken information de hade fått. De anser att den standardiserade strukturen inte är relevant för alla och att bristen på individanpassning förvårar möjligheten att få en rättvis bild av deras arbetsförmåga. 

    Diskussion: Social validitet utforskades för försäkringsmedicinska utredningar och myndighetsbeslut i termer av godtagbarhet, begriplighet och betydelse. Utredningarna indikerar en låg social validitet i termer av godtagbarhet på grund av bristen på individanpassning, även om vissa delar är mer socialt valida än andra. Vidare varierade utredningarnas begriplighet beroende på deras applicerbarhet och den erhållna informationen, medan dimensionen betydelse indikerar en högre grad av social validitet. Handläggarens påföljande myndighetsbeslut ansågs däremot orelaterat till utredningens resultat, sakna konkreta argument och ibland motsägande andra aktörers rekommendationer, vilket indikerar en låg social validitet i termer av både godtagbarhet, begriplighet och betydelse. 

    Slutsats: Social validitet finns för delar av utredningarna men är låg för det påföljande myndighetsbeslutet.