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  • Cronert, Axel
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Government. Uppsala Center for Labor Studies.
    Is regulatory compliance by employers possible without enforcement?: Evidence from the Swedish labor market2019Report (Other academic)
    Abstract [en]

    This study shines new light on an ongoing debate about the extent to which discouraging enforcement activities are necessary to make regulated actors comply with government regulations. Specifically, it evaluates a long-standing but essentially unenforced regulation that mandated employers in Sweden to post their vacancies at the Public Employment Service (PES) to improve matching and the labor market prospects of disadvantaged workers. Using comprehensive vacancy data from the PES, it tests whether the regulation – despite not being enforced – influenced employers' vacancy posting behavior in the period prior to its partial repeal in 2007. Exploiting the fact that the repeal did not apply to employers in the central government sector, the difference-in-differences analyses conducted in this study identify a substantial and significant negative effect of repealing the unenforced law on employers' vacancy posting behavior, under reasonable assumptions. This finding is at odds with standard deterrence models of regulatory compliance and hints at an important role for organizational factors related to cultures and norms. A supplementary analysis of heterogeneous effects among local government employers investigates to what extent some organizational factors are correlated to compliance with the unenforced regulation.

  • Cronert, Axel
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Government. Uppsala Center for Labor Studies.
    Kan regelefterlevnad uppnås utan hot om påföljder?: En utvärdering av lagen om allmän platsanmälan2019Report (Other (popular science, discussion, etc.))
    Abstract [sv]

    Studien som sammanfattas i denna rapport syftar till att undersöka i vilken mån lagar och regler kan påverka beteendet hos berörda aktörer utan att kombineras med tillsyn och hot om påföljder. Studien utvärderar lagen (1976:157) om allmän platsanmälan, som under trettio års tid föreskrev arbetsgivare i Sverige en skyldighet att i samband med rekrytering anmäla sina lediga platser till Arbetsförmedlingen. När lagen upphävdes i juli 2007 hade dess efterlevnad under en mycket lång tid inte alls kontrollerats. För att undersöka i vilken mån arbetsgivare trots detta efterlevde regelverket utnyttjar studien det faktum att lagens upphävande inte kom att beröra statliga arbetsgivare och därmed kan utvärderas genom jämförelser mellan sektorer. Utvärderingen visar att upphävandet av lagen ledde till en signifikant minskning av privata och kommunala arbetsgivares benägenhet att anmäla lediga platser. Det innebär således att lagen hade en beteendeeffekt trots avsaknaden av tillsyn och hot om påföljder. I en kompletterande analys av kommunala arbetsgivare undersöks i vilken mån ett antal organisatoriska faktorer samvarierar med benägenheten att efterleva regelverket trots avsaknaden av kontroll.

  • Ahlander, Britt-Marie
    Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
    Magnetic Resonance Imaging of the Heart: Image quality, measurement accuracy and patient experience2016Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Background: Non-invasive diagnostic imaging of atherosclerotic coronary artery disease (CAD) is frequently carried out with cardiovascular magnetic resonance imaging (CMR) or myocardial perfusion single photon emission computed tomography (MPS). CMR is the gold standard for the evaluation of scar after myocardial infarction and MPS the clinical gold standard for ischemia. Magnetic Resonance Imaging (MRI) is at times difficult for patients and may induce anxiety while patient experience of MPS is largely unknown.

    Aims: To evaluate image quality in CMR with respect to the sequences employed, the influence of atrial fibrillation, myocardial perfusion and the impact of patient information. Further, to study patient experience in relation to MRI with the goal of improving the care of these patients.

    Method: Four study designs have been used. In paper I, experimental cross-over, paper (II) experimental controlled clinical trial, paper (III) psychometric crosssectional study and paper (IV) prospective intervention study. A total of 475 patients ≥ 18 years with primarily cardiac problems (I-IV) except for those referred for MRI of the spine (III) were included in the four studies.

    Result: In patients (n=20) with atrial fibrillation, a single shot steady state free precession (SS-SSFP) sequence showed significantly better image quality than the standard segmented inversion recovery fast gradient echo (IR-FGRE) sequence (I). In first-pass perfusion imaging the gradient echo-echo planar imaging sequence (GREEPI) (n=30) had lower signal-to-noise and contrast–to-noise ratios than the steady state free precession sequence (SSFP) (n=30) but displayed a higher correlation with the MPS results, evaluated both qualitatively and quantitatively (II). The MRIAnxiety Questionnaire (MRI-AQ) was validated on patients, referred for MRI of either the spine (n=193) or the heart (n=54). The final instrument had 15 items divided in two factors regarding Anxiety and Relaxation. The instrument was found to have satisfactory psychometric properties (III). Patients who prior CMR viewed an information video scored significantly (lower) better in the factor Relaxation, than those who received standard information. Patients who underwent MPS scored lower on both factors, Anxiety and Relaxation. The extra video information had no effect on CMR image quality (IV).

    Conclusion: Single shot imaging in atrial fibrillation produced images with less artefact than a segmented sequence. In first-pass perfusion imaging, the sequence GRE-EPI was superior to SSFP. A questionnaire depicting anxiety during MRI showed that video information prior to imaging helped patients relax but did not result in an improvement in image quality.

  • Rybarczyk, Yves
    et al.
    Dalarna University, School of Technology and Business Studies, Microdata Analysis. Universidad de Las Américas, Quito, Ecuador.
    Carvalho, D. G.
    Cordella, F.
    Bioinspired Implementation and Assessment of a Remote-Controlled Robot2019In: Applied Bionics and Biomechanics, ISSN 1176-2322, E-ISSN 1754-2103, article id 8575607Article in journal (Refereed)
  • Petersson, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Elektroniska marknadsplatser: IT-stöd för små och medelstora leverantörer2019Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The aim of this dissertation is to identify what constitutes a desirable design for electronic marketplaces from the perspective of small and medium-sized suppliers. The specific marketplace category under study is business-oriented marketplaces, which are marketplaces that mediate commercial transactions between organizations (in a so-called business-to-business setting). An important justification for the study is the fact that research has shown a disproportionately small interest in studying the issue from this perspective, despite there being both scientific and practical needs for greater knowledge in this area. That is to say, there are a number of important and unanswered questions regarding marketplace suppliers in general and the situation of small suppliers in specific.

    The overarching research question is: “What kind of electronic marketplace design is preferable in order to support the needs of small suppliers” and this question has been answered through the development, presentation and application of a set of seven design criteria. The research project was comprised of several sub-studies and characterized by a qualitative approach. Practice theory has been used as the central theoretical perspective of the study. The object of study in the primary case was the Scandinavian marketplace Proceedo and the practical work undertaken involved collecting and analyzing data in the form of interviews, documents and system tests.

    The study’s contribution to knowledge is made up of four parts: a set of criteria for electronic marketplace design, a conceptualization of marketplace practices, a categorization of SME supplier needs and finally a suggested set of generic design principles for work practices. The design criteria are presented as seven prescriptive statements that may be used to aid practical marketplace design. The set of criteria therefore also directly answers the overarching research question. For the purposes of observing, analyzing and understanding the phenomenon of electronic marketplaces, this study also presents the two concepts of marketplace practice and sales practice.

    When it came to the resulting categorization of supplier needs, the study found that the primary need was for compliance with customer desires and demands. Furthermore, the analysis also revealed two main areas within electronic marketplace interaction in which SME suppliers have particular needs. The first concerns business information – suppliers need to be able to examine and change their own business information. The second relates to business harmonization – there is a need for marketplace activities to harmonize with the regular business activities of suppliers. The study has also resulted in a contribution on a more theoretical and abstract level. It has produced a presentation of a prescriptive extension of an existing work practice model. The extension is a set of generic design principles that stem from the information systems domain and socio-technical theory.

  • Andersson, Ida
    Stockholms universitet, Kulturgeografiska institutionen.
    Geographies of Place Branding: Researching through small and medium sized cities2015Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Place branding is commonly conceptualized with a focus on big cities, such as London, New York and Singapore, building from concepts and models from mainstream branding theory. In contrast to such conceptualizations, this thesis focuses on place branding in small and medium-sized cities. The present thesis aims to study place branding from a geographical perspective. It starts with debates theoretical and empirical understandings of place branding; what it is and how it is affecting the places where it is introduced. The thesis develops and argues for a perspective of territoriality and relationality to place branding discussing concepts, methods and empirical approaches to carry out place branding research using geographical perspectives. Empirically, this thesis focuses on in-depth studies of place branding in small and medium-sized cities in Sweden. By analyzing the development of place branding over the course of time, nuances and aspects of both territorial and relational origin emerge, situating place branding practices within a wider spatial contextualization. Four individual papers are presented, which taken together contribute to the aim of the thesis. Paper 1 introduces the place branding research field in geography and how it has developed; Paper 2 investigates the phenomena of flagship buildings located in small cities and towns; Paper 3 discusses the relationship between policy tourism and place branding; and Paper 4 analyzes how local environmental policies are affected by green place branding. The thesis demonstrates the complex and continuously interchangeable spatial structures and place contexts that create and re-produce the geographies of place branding. Here, research models and methodological examples are presented to illustrate how place branding can be studied from a geographical perspective and thus improve theoretical understandings of place branding.

  • Seyfferth, Carolin
    et al.
    Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
    Wessels, Bernard A.
    Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
    Gorzsás, András
    Umeå University, Faculty of Science and Technology, Department of Chemistry.
    Love, Jonathan W.
    Rüggeberg, Markus
    Delhomme, Nicolas
    Vain, Thomas
    Antos, Kamil
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB).
    Tuominen, Hannele
    Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC). Umeå University, Faculty of Science and Technology, Department of Plant Physiology.
    Sundberg, Björn
    Felten, Judith
    Ethylene Signaling Is Required for Fully Functional Tension Wood in Hybrid Aspen2019In: Frontiers in Plant Science, ISSN 1664-462X, E-ISSN 1664-462X, Vol. 10, article id 1101Article in journal (Refereed)
    Abstract [en]

    Tension wood (TW) in hybrid aspen trees forms on the upper side of displaced stems to generate a strain that leads to uplifting of the stem. TW is characterized by increased cambial growth, reduced vessel frequency and diameter, and the presence of gelatinous, cellulose-rich (G-)fibers with its microfibrils oriented parallel to the fiber cell axis. Knowledge remains limited about the molecular regulators required for the development of this special xylem tissue with its characteristic morphological, anatomical, and chemical features. In this study, we use transgenic, ethylene-insensitive (ETI) hybrid aspen trees together with time-lapse imaging to show that functional ethylene signaling is required for full uplifting of inclined stems. X-ray diffraction and Raman microspectroscopy of TW in ETI trees indicate that, although G-fibers form, the cellulose microfibril angle in the G-fiber S-layer is decreased, and the chemical composition of S- and G-layers is altered than in wild-type TW. The characteristic asymmetric growth and reduction of vessel density is suppressed during TW formation in ETI trees. A genome-wide transcriptome profiling reveals ethylene-dependent genes in TW, related to cell division, cell wall composition, vessel differentiation, microtubule orientation, and hormone crosstalk. Our results demonstrate that ethylene regulates transcriptional responses related to the amount of G-fiber formation and their properties (chemistry and cellulose microfibril angle) during TW formation. The quantitative and qualitative changes in G-fibers are likely to contribute to uplifting of stems that are displaced from their original position.

  • Tafvelin, Susanne
    et al.
    Umeå University, Faculty of Social Sciences, Department of Psychology.
    von Thiele Schwarz, Ulrica
    Stenling, Andreas
    Umeå University, Faculty of Social Sciences, Department of Psychology.
    Leadership Training to Increase Need Satisfaction at Work: A Quasi-Experimental Mixed Method Study2019In: Frontiers in Psychology, ISSN 1664-1078, E-ISSN 1664-1078, Vol. 10, article id 2175Article in journal (Refereed)
    Abstract [en]

    With a growing number of studies showing the applicability of the self-determination theory for various work and organizational outcomes, the next logical step is to investigate if and how employee need satisfaction at work can be purposefully increased through an intervention. The purpose of the present study was to test whether we could train managers' display of autonomy, competence, and relatedness support toward employees and whether this resulted in improved employee need satisfaction, well-being, and job performance. Data were obtained from 37 managers (rated by N = 538 subordinates) assigned to either an experimental or control condition at three time points: before, during, and after the training. We also used focus group interviews to evaluate the experience of the training. The quantitative analyses showed no statistically significant improvement in managers' display of needs support or employee need satisfaction. However, the qualitative data pointed toward important factors related to the implementation of need supportive leadership training that should be considered.

  • Nyberg, Lars
    et al.
    Umeå University, Faculty of Medicine, Department of Radiation Sciences. Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB). Umeå University, Faculty of Medicine, Umeå Centre for Functional Brain Imaging (UFBI).
    Andersson, Micael
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB). Umeå University, Faculty of Medicine, Umeå Centre for Functional Brain Imaging (UFBI).
    Lundquist, Anders
    Umeå University, Faculty of Medicine, Umeå Centre for Functional Brain Imaging (UFBI). Umeå University, Faculty of Social Sciences, Umeå School of Business and Economics (USBE), Statistics.
    Salami, Alireza
    Umeå University, Faculty of Medicine, Umeå Centre for Functional Brain Imaging (UFBI). Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB). Umeå University, Faculty of Medicine, Wallenberg Centre for Molecular Medicine at Umeå University (WCMM). Umeå University, Faculty of Medicine, Department of Radiation Sciences. Aging Research Center, Karolinska Institutet and Stockholm University, Solna, Sweden.
    Wåhlin, Anders
    Umeå University, Faculty of Medicine, Department of Radiation Sciences. Umeå University, Faculty of Medicine, Umeå Centre for Functional Brain Imaging (UFBI).
    Frontal Contribution to Hippocampal Hyperactivity During Memory Encoding in Aging2019In: Frontiers in Molecular Neuroscience, ISSN 1662-5099, Vol. 12, article id 229Article in journal (Refereed)
    Abstract [en]

    Hippocampal hypo- as well as hyper-activation have been reported during memory encoding in older individuals. Prefrontal cortex (PFC) provides top-down state signals to the hippocampus that bias its computation during memory encoding and retrieval, and disturbed top-down signals could contribute to hippocampal hyper-activation. Here, we used >500 cross-sectional and longitudinal observations from a face-name encoding-retrieval fMRI task to examine hippocampal hypo-and hyper-activation in aging. Age-related anterior hippocampal hypo-activation was observed during memory encoding. Next, older individuals who longitudinally dropped-out were compared with those who remained in the study. Older dropouts had lower memory performance and higher dementia risk, and hyper-activated right anterior and posterior hippocampus during memory encoding. During encoding, the dropouts also activated right prefrontal regions that instead were active during retrieval in younger and older remainers. Moreover, the dropouts showed altered frontal-hippocampal functional connectivity, notably elevated right PFC to anterior hippocampus (aHC) connectivity during encoding. In the context of a general pattern of age-related anterior hippocampal hypo-activation during encoding, these findings support a top-down contribution to paradoxically high anterior hippocampal activity in older dropouts who were at elevated risk of pathology.

  • Davis, Louise
    et al.
    Umeå University, Faculty of Social Sciences, Department of Psychology.
    Jowett, Sophia
    Tafvelin, Susanne
    Umeå University, Faculty of Social Sciences, Department of Psychology.
    Communication Strategies: The Fuel for Quality Coach-Athlete Relationships and Athlete Satisfaction2019In: Frontiers in Psychology, ISSN 1664-1078, E-ISSN 1664-1078, Vol. 10, article id 2156Article in journal (Refereed)
    Abstract [en]

    The present two-study paper examined the role of communication strategies that athletes use to develop their coach-athlete relationship. Study 1 examined the mediating role of motivation, support, and conflict management strategies between the quality of the coach-athlete relationship and athletes' perceptions of sport satisfaction. Study 2 examined the longitudinal and mediational associations of communication strategies and relationship quality across two time points, over a 6-week period. Within both studies, data were collected through multi-section questionnaires assessing the studies' variables. For study 1, structural equation modeling highlighted significant indirect effects for motivation and support strategies between the quality of the coach-athlete relationship and athletes' experiences of sport satisfaction. For study 2, significant indirect effects were found for the athletes' perceptions of the quality of the coach-athlete relationship at time 2 between athletes' use of communication strategies at time point 1 and time point 2. Together these findings provide support for the practical utility of communications strategies in enhancing the quality of the coach-athlete relationship and athlete's experiences of sport satisfaction. In addition, the findings provide evidence to highlight the potential cyclical relationship between communication and relationship quality across time.

  • 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.

  • Moll, Jonas
    et al.
    Department of Information Technology, Uppsala University, Uppsala, Sweden.
    Frid, Emma
    2Department of Media Technology and Interaction Design, KTH Royal Institute of Technology, Stockholm, Sweden.
    Using eye-tracking to study the effect of haptic feedback on visual focus during collaborative object managing in a multimodal virtual interface2017In: Proceedings of the 13th SweCog conference, Högskolan i Skövde , 2017, p. 49-51Conference paper (Refereed)
  • 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.

  • Aaboud, M.
    et al.
    Asimakopoulou, Eleni M.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Bergeås Kuutmann, Elin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Bokan, Petar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellajosyula, Venugopal
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P. O. Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Isacson, Max
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Mårtensson, Mikael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Sales De Bruin, Pedro
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Dijet azimuthal correlations and conditional yields in pp and p+Pb collisions at √sNN=5.02TeV with the ATLAS detector2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 3, article id 034903Article in journal (Refereed)
    Abstract [en]

    This paper presents a measurement of forward-forward and forward-central dijet azimuthal angular correlations and conditional yields in proton-proton (pp) and proton-lead (p + Pb) collisions as a probe of the nuclear gluon density in regions where the fraction of the average momentum per nucleon carried by the parton entering the hard scattering is low. In these regions, gluon saturation can modify the rapidly increasing parton distribution function of the gluon. The analysis utilizes 25 pb(-1) of pp data and 360 mu b(-1) of p + Pb data, both at root S-NN = 5.02 TeV, collected in 2015 and 2016, respectively, with the ATLAS detector at the Large Hadron Collider. The measurement is performed in the center-of-mass frame of the nucleon-nucleon system in the rapidity range between -4.0 and 4.0 using the two highest transverse-momentum jets in each event, with the highest transverse-momentum jet restricted to the forward rapidity range. No significant broadening of azimuthal angular correlations is observed for forward-forward or forward-central dijets in p + Pb compared to pp collisions. For forward-forward jet pairs in the proton-going direction, the ratio of conditional yields in p + Pb collisions to those in pp collisions is suppressed by approximately 20%, with no significant dependence on the transverse momentum of the dijet system. No modification of conditional yields is observed for forward-central dijets.

  • Nerhagen, Lena
    et al.
    VTI, Statens väg- och transportforskningsinstitut.
    Forsstedt, Sara
    The Swedish Transport Agency.
    Edvardsson, Karin
    The Swedish Transport Agency.
    The precautionary principle and regulatory impact assessment: on the need for initial screening of hazards in regulatory work with examples from transport2018Report (Other academic)
    Abstract [en]

    To achieve effective regulation, the OECD and the European Commission recommend the use of regulatory impact assessment (RIA). The full RIA process has however not been implemented in Sweden. There is for example a lack of established practices at the national level for the analysis of risk in regulatory work. Instead, soft law in the form of management by objective systems is guiding transport and environmental policy. These systems were introduced in the end of the 1990s following the international discussion on the precautionary principle. According to findings in other countries, policy making based on the precautionary principle may result in unexpected and unwanted consequences and therefore, based on a literature review and an assessment of current practices in transport regulation in Sweden, we suggest the use of an initial screening of hazards in regulatory work. We also apply the proposed method to four transport related case studies to illustrate how an initial assessment can provide the basis for an informed discussion on what hazards to counteract with regulation and on what grounds.

  • Nerhagen, Lena
    VTI, Statens väg- och transportforskningsinstitut.
    Dieselization in Sweden: blessing or curse?2018Report (Other academic)
    Abstract [en]

    In this paper we discuss, based on research on the external cost of air pollution, if diesel as a fuel in the transport sector should be encouraged or discouraged in Swedish environmental policy. There are two main reasons for posing this question. The first is the international context where the use of diesel is generally considered to be a bad, due to its negative health effects. The second is the Swedish context with an ambitious vision for a fossil free vehicle fleet in 2030 where the use of diesel produced from forestry residues could be part of the solution. In recent years the use of diesel cars has been encouraged by various policy measures, for example a subsidy based on assessments of emissions for CO2 per kilometer. Is this a policy that should be continued or abandoned? In this paper we focus on the health impacts and our conclusion is that dieselization is more a blessing than a curse. The reason is that Sweden is a sparsely populated country and therefore the health costs of emissions from road transport are low by international standards.

  • Assarsson, Rebecka
    et al.
    Umeå universitet.
    Petersen, Solveig
    Umeå universitet.
    Högberg, Björn
    Umeå universitet.
    Strandh, Mattias
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Centre for Research on Child and Adolescent Mental Health (from 2013). Umeå universitet.
    Johansson, Klara
    Umeå universitet.
    Gender inequality and adolescent suicide ideation across Africa, Asia, the South Pacific and Latin America: A cross-sectional study based on the Global School Health Survey (GSHS)2019In: Global Health Action, ISSN 1654-9716, E-ISSN 1654-9880, Vol. 11, no sup3, p. 1-10, article id 1663619Article in journal (Refereed)
    Abstract [en]

    Background: Suicide ideation is a health issue affecting adolescents worldwide. There are significant variations in suicide ideation between countries and genders, which have not been fully explained. Research is especially lacking in countries outside Europe and North America. Gender equality has been shown to matter in other aspects of adolescent mental health, such as life satisfaction, but has not been researched in relation to suicide ideation at national level.

    Objective: To investigate how national gender inequality is related to self-reported suicide ideation among adolescents, and whether this association differs between boys and girls.

    Methods: This is a cross-national, cross-sectional study using individual survey data from the Global School-based Student Health Survey, a survey in Africa, Asia, Latin America and the South Pacific, developed and supported by among others the WHO and the CDC; connecting this to national data: the gender inequality index from the UNDP; controlling for GDP per capita and secondary school enrolment. The data was analysed using a multilevel logistic regression method and included 149,306 students from 37 countries.

    Results: Higher national gender inequality, as measured by the gender inequality index, was significantly associated with a higher likelihood of suicide ideation in both girls and boys (odds ratio: 1.38 p-value: 0.015), but for girls and both sexes this was only after adjusting for selection bias due to secondary school enrolment (as well as GDP/capita). Interaction models showed that this association was stronger in boys than in girls.

    Conclusions: National gender inequality seems to be associated with higher levels of suicide ideation among adolescents in mainly low- and middle-income countries, especially among boys.

  • Engman, Jonas
    The Nordic Museum.
    Upp- och nedvända världar: lek, karneval och bus2014In: Lekar och spel, Stockholm: Nordiska museets förlag, 2014, p. 38-49Chapter in book (Other academic)
  • Peterson, Gunnel
    et al.
    O'Leary, Shaun
    Nilsson, David
    Umeå University, Faculty of Science and Technology, Department of Chemistry.
    Moodie, Katherine
    Tucker, Kylie
    Trygg, Johan
    Umeå University, Faculty of Science and Technology, Department of Chemistry.
    Peolsson, Anneli
    Ultrasound imaging of dorsal neck muscles with speckle tracking analyses: the relationship between muscle deformation and force2019In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, article id 13688Article in journal (Refereed)
    Abstract [en]

    The development of methods of non-invasive measurement of neck muscle function remains a priority in the clinical sciences. In this study, dorsal neck muscle deformation vs time curves (deformation area) were evaluated against incremental force, recorded from non-invasive real-time ultrasound measurement. The results revealed subject-specific moderate to strong linear or non-linear relationships between deformation and force. Test-retest variability showed strong reliability for all five neck muscles summed together and fair to good reliability for the five muscles evaluated separately. Multivariate statistics were used to analyse the interactions between the dorsal neck muscles during different percentages of maximal voluntary contraction (MVC). Low force (10-20% MVC) was related to muscle shortening; higher force (40-80% MVC) showed combination of shortening and elongation deformation in the muscle interactions. The muscle interactions during isometric MVC test were subject-specific, with different combinations and deformations of the five neck muscles. Force >= 40% MVC were associated with a forward movement of the cervical spine that affected the ultrasound measurement of the dorsal neck muscles. Ultrasound with speckle-tracking analyses may be best used to detect low levels (<40% MVC) of neck muscle activity.

  • Hammarfelt, Björn
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Discipline2019In: ISKO Encyclopedia of Knowledge OrganizationArticle, review/survey (Refereed)
    Abstract [en]

    Discipline is commonly used to denote particular areas of knowledge, research and education. Yet, the concept is often not very well defined or even explicitly discussed when used in knowledge organization and related fields. The aim of this article is to encourage and facilitate further reflections on academic disciplines, while at the same time offering insights on how this elusive concept might be understood. An overarching argument is that discipline should foremost be understood in relation to institutional and organizational features and this is what distinguishes it from related terms such as, fielddomain or topic. The paper reviews the etymology and history of the concept, it discusses attempts to define and conceptualise disciplines and it offers insights on how disciplines can be studied. Regardless of our views of disciplines, either as inherently out-dated constructs or as important features of a well-functioning academia, it is concluded that further precision or care in explicating the concept is needed.

  • Pölönen, Janne
    et al.
    Federation of Finnish Learned Societies.
    Hammarfelt, Björn
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Historical bibliometrics using Google Scholar: The case of Roman law, 1500-20162019In: Proceedings of the 17th Conference of the International Society for Scientometrics and Informetrics / [ed] Catalano, Giuseppe; Daraio, Cinzia; Gregori, Martina; Moed, Henk F.; Ruocco, Giancarlo;, 2019, p. 2491-2492Conference paper (Refereed)
  • Nowé Hedvall, Karen
    et al.
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Lindberg, Jenny
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Michnik, Katarina
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Ögland, Malin
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Användarna först med det digitala i fokus: Folkbibliotekariers arbete inom den nationella satsningen för ökad digital kompetens2019Report (Other academic)
  • Zhang, Fan
    et al.
    Dalarna University, School of Technology and Business Studies, Microdata Analysis.
    Fleyeh, Hasan
    Dalarna University, School of Technology and Business Studies, Computer Engineering.
    Short Term Electricity Spot Price Forecasting Using CatBoost and Bidirectional Long Short Term Memory Neural Network2019In: 16th European Energy Market Conference (EEM 19), 2019Conference paper (Refereed)
    Abstract [en]

    Electricity price forecasting plays a crucial role in liberalized electricity markets. Generally speaking, short term electricity price forecasting is essential for electricity providers to adjust the schedule of production in order to balance consumers’ demands and electricity generation. Short term forecasting results are also utilized by market players to decide the timing of purchasing or selling to gain maximized profit. Among existing forecasting approaches, neural networks are regarded as the state of art method. However, deep neural networks are not studied comprehensively in this field, thus the motivation of this study is to fill this research gap. In this paper, a novel hybrid approach is proposed for short term electricity price forecasting. To be more specific, categorical boosting (Catboost) algorithm is used for feature selection and a bidirectional long short term memory neural network (BDLSTM) serves as the main forecasting engine. To evaluate the effectiveness of the proposed approach, two datasets from the Nord Pool market are employed in the experiment. Moreover, the performance of multi-layer perception (MLP) neural network, support vector regression (SVR) and ensemble tree models are evaluated and compared with the proposed model. Results show that the proposed approach outperforms the rest models in terms of mean absolute percentage error (MAPE).

  • 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.

  • Dern, Karin
    The Nordic Museum.
    Spel till nytta och nöje2014In: Lekar och spel, Stockholm: Nordiska museets förlag, 2014, p. 12-37Chapter in book (Other academic)
  • Åström, Fredrik
    et al.
    Lund University.
    Hammarfelt, Björn
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Conceptualising dimensions of bibliometric assessment: From resource allocation systems to evaluative landscapes2019In: Proceedings of the 17th Conference of the International Society for Scientometrics and Informetrics / [ed] Catalano, Giuseppe; Daraio, Cinzia; Gregori, Martina; Moed, Henk F.; Ruocco, Giancarlo;, 2019, p. 1256-1261Conference paper (Refereed)
    Abstract [en]

    The purpose of this paper is to discuss the conceptualisation of bibliometric analyses in terms of the levels on which they are performed, adding contextual factors to the dimension where the size of the unit being analysed is considered. Based on empirical investigations of resource allocation systems and research evaluation practices, as well as the previous literature conceptualising bibliometric analyses, a framework based on Whitley’s (2000) notion of research fields as ‘reputational work organisations’, is discussed. The results suggest adding a contextual ‘reputational dimension’ to the size-based dimension distinguishing between micro-, meso- andmacro-level analyses. Furthermore, we propose that ‘evaluative landscapes’ (Brandter, 2017) might be a fruitful approach for further analysing how complex and multifaceted landscapes of research assessment affects the individual researcher.

  • Ahman, Hanna Bozkurt
    et al.
    Giedraitis, Vilmantas
    Cedervall, Ylva
    Lennhed, Bjorn
    Berglund, Lars
    McKee, Kevin
    Kilander, Lena
    Rosendahl, Erik
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy.
    Ingelsson, Martin
    Aberg, Anna Cristina
    Dual-Task Performance and Neurodegeneration: Correlations Between Timed Up-and-Go Dual-Task Test Outcomes and Alzheimer's Disease Cerebrospinal Fluid Biomarkers2019In: Journal of Alzheimer's Disease, ISSN 1387-2877, E-ISSN 1875-8908, Vol. 71, p. S75-S83Article in journal (Refereed)
    Abstract [en]

    Background: Tools to identify individuals at preclinical stages of dementia disorders are needed to enable early interventions. Alterations in dual-task performance have been detected early in progressive neurodegenerative disorders. Hence, dual-task testing may have the potential to screen for cognitive impairment caused by neurodegeneration. Exploring correlations between dual-task performance and biomarkers of neurodegeneration is therefore of interest.

    Objective: To investigate correlations between Timed Up-and-Go dual-task (TUGdt) outcomes and Alzheimer's disease (AD) cerebrospinal fluid (CSF) biomarkers amyloid-beta 42 (A beta(42)), total tau (t-tau), and phosphorylated tau (p-tau).

    Methods: This cross-sectional cohort study included 90 participants (age range 49-84 years) undergoing memory assessment, who were subsequently diagnosed with AD, other dementia disorders, mild cognitive impairment, or subjective cognitive impairment. TUG combined with "Naming Animals" (TUGdt NA) and "Months Backwards" (TUGdt MB), respectively, were used to assess dual-task performance. The number of correct words and time taken to complete the tests were measured. The CSF biomarkers were analysed by ELISA. Spearman's rank correlation was used for analyses between TUGdt outcomes (TUGdt NA and TUGdt MB), and CSF biomarkers, adjusted for age, gender, and educational level.

    Results: The number of correct words, as well as the number of correct words/10 s during TUGdt NA correlated negatively to CSF t-tau and p-tau. No correlations were found between any time scores and CSF biomarkers.

    Conclusion: The correlations between TUGdt NA and t-tau and p-tau may indicate that neurodegeneration affects dual-task performance. Longitudinal studies are needed to further explore dual-task testing in screening for cognitive impairment due to neurodegeneration.

  • Waldetoft, Dan
    The Nordic Museum.
    Inledning2014In: Lekar och spel, Stockholm: Nordiska museets förlag, 2014, p. 7-11Chapter in book (Other academic)
  • Public defence: 2019-11-05 09:15 Häggsalen, Uppsala
    Redzwan Mohd Shah, Syaiful
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Prospective Applications of Microwaves in Medicine: Microwave Sensors for Orthopedic Monitoring and Burn Depth Assessment2019Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    In recent years, the use of microwave techniques for medical diagnostics has experienced impressive developments. It has demonstrated excellent competencies in various modalities such as using non-ionizing electromagnetic waves, providing non-invasive diagnoses, and having the ability to penetrate human tissues within the GHz range. However, due to anatomical, physiological, and biological variations in the human body, certain obstacles are present. Moreover, there are accuracy problems such as the absence of numerical models and experimental data, difficulty in conducting tests due to safety issues with human subjects, and also practical restrictions in clinical implementation. With the presence of these issues, a better understanding of the microwave technique is essential to further improve its medical application and to introduce alternative diagnostic methods that can detect and monitor various medical conditions in real time.

    The first part of this thesis focuses on measurement systems for the microwave technique in terms of sensor design and development, numerical analysis, permittivity measurement, and phantom fabrication. The aim is to investigate the feasibility of flexible systems with different fields of application including a microwave sensor system for measuring the healing progression of bone defects present in lower extremity trauma, bone regeneration in craniotomy for craniosynostosis treatments, and dielectric variation for burn injuries. The microwave sensor which utilizes the contrast in dielectric constant between various tissues was used as the primary sensor for the proposed application. This involved detailed optimization of the sensor for greater sensitivity. The experimental work carried out in the lab environment showed that the microwave sensor was able to detect the contrast in dielectric properties so that it can give an indication of the healing status for actual clinical scenarios.

    The second part of the thesis is making a significant step towards its practical implementation by establishing a system that can detect and monitor the rate of healing progression with fast data acquisition speed of microseconds, and developing an efficient user interface to convert raw microwave data into legible clinical information in terms of bone healing and burn injuries. As an extension to this thesis, clinical studies were conducted and ethical approval for conducting tests on human subjects was obtained for the development of a microwave medical system. The results showed a clear difference in healing progressions due to high detection capability in terms of dielectric properties of different human tissues. All of these contributions enable a portable system to complement existing medical applications with the aim of providing more advanced healthcare systems.

  • Fransson, Martin
    et al.
    Centrum för tjänsteforskning (from 2013), Karlstads universitet, Karlstad, Sverige.
    Quist, Johan
    Centrum för tjänsteforskning (from 2013), Karlstads universitet, Karlstad, Sverige.
    Wetter-Edman, Katarina
    Örebro University, Örebro University School of Business.
    Politisk handlingskraft i en regeringsnära utvecklingsmiljö2019Report (Other academic)
    Abstract [sv]

    I denna rapport förordas att regeringen ska inrätta en varaktig utvecklingsmiljö inom kommittéväsendet. Det skulle ge ytterligare politisk handlingskraft. Avsikten skulle vara att bekä­mpa sådana sektorsövergripande samhällsutmaningar som involverar ett system av aktörer och som visat sig svåra att bemästra genom ordinarie styrning och samverkan. Som exempel kan nämnas punktligheten i järnvägstrafiken eller den fara för patientsäkerheten som uppstår när livsviktiga läkemedel saknas vid landets apotek.

    Både i fråga om kvalitet och kostnad kan betydande samhällsekonomiska vinster då hämtas hem. Samtidigt skulle varken utvecklingsmiljön eller de lösningar den frambringar medföra någon belastning på statsbudgeten. Myndigheternas ansvar påverkas inte och deras deltagande skulle inte medföra några juridiska konsekvenser. Inte heller krävs det någon ny mottagarkapacitet eller andra förstärkningar inom Regeringskansliet.

    Med en regeringsnära utvecklingsmiljö skulle Sverige ansluta till en lång rad av länder som redan etablerat vad som ofta kallas för labb eller som mera kraftfullt beskrivs som en insatsstyrka.  Poängen är dock inte att tvinga fram eller att styra utformningen av de lösningar som utvecklas, ej heller att ta över ägarskapet.

    I utvecklingsmiljön skulle aktörerna få den kvalificerade hjälp de efterfrågar för att gemensamt lösa ut frågor som ”trillat mellan stolarna” och där ansvaret tycks ligga på ”ingen, någon, vemsomhelst eller alla”. Nackdelarna med den annars relativt väl fungerande sektorsindelningen och resultatstyrningen skulle kunna minska. En del av kritiken mot den så kallade stuprörsförvaltningen skulle kunna stillas. 

    Idén är inte ny. Andra har tidigare argumenterat för liknande åtgärder. Föreliggande rapport bidrar med en extensiv genomgång av relevant litteratur samt en kartläggning av Regeringskansliets arbetssätt, förmågor och tillkortakommanden. För att undersöka vad myndigheterna själva kan hantera har det även gjorts praktiska försök samt kartlagts vilka förmågor som finns i befintliga svenska utvecklingsmiljöer. 

    Försöken och kartläggningarna visar att myndigheternas egna ansvar att samverka räcker långt. Av naturliga skäl saknar de dock uppdrag och mandat att självsvåldigt anpassa och använda andra aktörers resurser i tjänstesystemet. Många myndighetsöverskridande utmaningar blir svåra att åtgärda när inte alla ställer upp. Myndigheternas representanter efterfrågar därför en aktörsneutral arena på regeringens överordnade nivå där de ges vägledning och professionellt stöd. Något sådant stöd har hittills inte kunnat påräknas.

    Genom kartläggningen av Regeringskansliets arbetssätt blir det tydligt varför idén om en utvecklingsmiljö inte tidigare har tagits tillvara. Kansliet är helt enkelt utformat för beredning av ärenden och styrning och inte lämpat för praktisk utveckling. 

    Förutsättningarna är däremot bättre inom kommittéväsendet. Där skulle den efterfrågade miljön kunna inrättas utan en bortre tidsgräns, som fallet varit med Expertgruppen för Studier i Offentlig ekonomi (ESO).

    Kommittéväsendets relativa närhet till regeringen gör att de aktörer som bjuds in till miljön sannolikt kommer att vilja delta. Genom att låta uppdragen tilldelas av Statsrådsberedningen skulle även många av de oavsiktliga hinder kunna undanröjas som följer av att styrningen är sektorsindelad och primärt inte avsedd för gränsöverskridande frågor.

  • Zhang, Fan
    et al.
    Dalarna University, School of Technology and Business Studies, Microdata Analysis.
    Fleyeh, Hasan
    Dalarna University, School of Technology and Business Studies, Computer Engineering.
    A Review of Single Artificial Neural Network Models for Electricity Spot Price Forecasting2019In: European Energy Market 2019, 2019Conference paper (Refereed)
    Abstract [en]

    Electricity price forecasting plays a crucial role in a liberalized electricity market. In terms of forecasting approaches, computational intelligence based models have been widely used with respect to electricity price forecasting and among all computation intelligence based models, artificial neural networks are most popular among researchers due to their flexibility and efficiency in handling complexity and non-linearity. However, a review of recent applications of neural networks for electricity price forecasting is not found in the literature. The motivation of this paper is to fill this research gap. In this study, existing approaches are analyzed and a summary of the strengths and weaknesses of each approach is presented. Besides, each neural network model is briefly summarized, followed by reviews of the corresponding studies of each neural network with respect to electricity forecasting from year 2010 onwards. Major contributions, datasets adopted as well as the corresponding experiment results are analyzed for each reviewed study. Apart from the review of existing studies, the advantages and disadvantages of each type of neural network model are discussed in details. Compared with neural networks based hybrid models, a single neural network model is easier to be implemented, less complex and more efficient. Scope of the review is the application of non-hybrid neural network models. It is found that most literature focuses on short term electricity price forecasting while medium and long term forecasting still remain relatively uncovered.

  • Chiriac, Eva Hammar
    et al.
    Linköping University, Department of Behavioural Sciences and Learning, Linköping, Sweden.
    Forslund Frykedal, Karin
    University West, Department of Social and Behavioural Studies, Division for Educational Science and Languages.
    Teacher´s Talk about Group Work Assessment before and after Participation in An Intervention2019In: Creative Education, ISSN 2151-4755, E-ISSN 2151-4771, Vol. 10, no 9, article id 95471Article in journal (Refereed)
    Abstract [en]

    Previous research has shown that teachers use an indistinct vocabulary, employ few concepts, and expose an embryonic professional language when talking about group work assessment, thus indicating a lack of a professional language. Building on Granström´s three different modes of language use everyday, pseudo-meta- and meta-language, the purpose of this article was to examine the teachers use of languages when talking about group work assessment. Specifically, if and how teachers use of modes of languages are influenced by them partaking in 1) a study about assessment in group work and 2) in an intervention in form of a short educational session. Data were gathered from interviews with eight teachers working in years five and eight in five Swedish compulsory schools and analysed both qualitatively and quantitatively. The results revealed that all of the teachers use Granstöms mode of languages to a varying degree when talking about assessment in cooperative situations. A core finding was that intervention in the form of a short education influenced the teachers way of talking in a positive way. By participating in the intervention, the teachers developed and expanded their mode of language, thereby promoting the use of a common professional language about group work assessment.

  • Arfan, Muhammad
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Environmental Science. 202100-2890.
    Biogas Value Chain in Gävleborg: Feedstock, Production and Use2019Report (Other academic)
    Abstract [en]

    This report aims to identify the current status and future opportunities for biogas as an alternative fuel for road transport in the Gävleborg region. The regional actors along the value chain are mapped by their role in feedstock supply, production and use of the biogas. Mapping and analysis of biogas development generally in Sweden and particularly in the Gävleborg region has been conducted primarily through literature, national and regional statistics and through interviews with the regional actors. About 15 companies were reached through emails and phone calls during the interview process.

    In 2017, about 3.5-4.0 million Nm3 of raw biogas (50-65% CH4) was produced in the region of which 3.6 GWh was upgraded. The region has two plants with upgrading facilities, one in Forsbacka, which produces gas mainly from food waste and Duvbacken, the wastewater treatment plant in Gävle. The gas produced at these two big facilities is upgraded and mostly used as transport fuel in the region, and for the industry. Gas produced from other sources is either used for heat and electricity production or flared to avoid methane emissions to the environment. The region has 14 buses and more than 500 other vehicles running on biogas. The gas infrastructure is not well developed in the region except for two filling stations situated in Gävle and Forsbacka. However, some developments on building biogas infrastructure for transport are in process.

    Analysis of interviews with actors and literature studies revealed that the region has much more feedstock for biogas production than used in the currently installed capacity of biogas technologies. Many actors showed great interest in its use as transport fuel but had very serious concerns about its future scope. Lack of supporting infrastructure such as filling stations, very low market demand and regional long-term strategies on biogas as transport fuel are considered barriers in the sector´s further development in the region. The value chain actors need to work more closely to get the most out of this valuable resource. Additionally, future planning on biogas should also consider its other uses such as an energy source for manufacturing industry, shipping and as raw material for chemicals or intermediate products.

  • Johansson, Lars-Olof
    et al.
    University West, School of Business, Economics and IT, Divison of Informatics.
    Lundh Snis, Ulrika
    University West, School of Business, Economics and IT, Divison of Informatics.
    Exploring digital service innovation-a Scandinavian perspective2018Conference paper (Refereed)
    Abstract [en]

    The research in this paper has digital services innovation to support Human-Centred Service Systems (HCSSs) as a foundation. It is a conceptual paper grounded in a multi-disciplinary literature review (Service Science, Innovation Theory and Information Systems). The starting point of the literature review was the special issue on Service innovation in the digital age in MISQ 2015. In the literature review, a combination of concept-centric and author-centric approaches were used. The overriding aim of this paper is to expand our understanding of digital service innovation in Human-Centred Service Systems. The paper has adopted a Scandinavian perspective on digital service innovation in HCSSs. The posted research question is which are the characteristics of digital service innovation in HCSSs? The contribution of the paper is a problematization of digital service innovation in HCSSs from a Scandinavian perspective. In the findings three problems are proposed: the dominant understanding of value, value creation, and value co-creation are grounded in service sciences; the understanding of collaboration and participation by the service beneficiary in networks during digital service innovation and lastly is the lack of understanding regarding heterogeneity among involved actors.

  • Scarpa, Simone
    Umeå University, Faculty of Social Sciences, Department of Social Work.
    Institutional and Sociological Approaches to the Aggregation of Detailed Immigrant Data: A Missing Link?2019Report (Refereed)
    Abstract [en]

    One of the dilemmas facing multi-ethnic societies is how to recognize ethnic diversity while avoiding the risk of reifying ethnic identities, i.e. conceiving ethnic groups as homogeneous and static entities. Ethnic categorization is an essential and necessary tool for developing adequate policies to address unequal opportunities and discrimination. At the same time, ethnic categorizationis an inherently problematic procedure, in official statistics but also in ethnic and migration studies. In fact, ethnic categorization may involuntarily contribute to the reinforcement of stereotypes and negative attitudes towards immigrant groups and, by and large, to the ‘racialization’ of society. The aim of this issue brief is two-fold: (1) to present and compare how the issues of ethnic categorization are dealt with by researchers of selected EU countries and (2) to highlight how cross-country differences in ethnic categorization and pan-ethnic classification practices are also related to different population-counting traditions.

  • Kratzer, Susanne
    et al.
    Kyryliuk, Dmytro
    Edman, Moa
    SMHI, Research Department, Oceanography.
    Philipson, Petra
    Lyon, Steve W.
    Synergy of Satellite, In Situ and Modelled Data for Addressing the Scarcity of Water Quality Information for Eutrophication Assessment and Monitoring of Swedish Coastal Waters2019In: Remote Sensing, ISSN 2072-4292, E-ISSN 2072-4292, Vol. 11, no 17Article in journal (Refereed)
    Abstract [en]

    Monthly CHL-a and Secchi Depth (SD) data derived from the full mission data of the Medium Resolution Imaging Spectrometer (MERIS; 2002-2012) were analysed along a horizontal transect from the inner Braviken bay and out into the open sea. The CHL-a values were calibrated using an algorithm derived from Swedish lakes. Then, calibrated Chl-a and Secchi Depth (SD) estimates were extracted from MERIS data along the transect and compared to conventional monitoring data as well as to data from the Swedish Coastal zone Model (SCM), providing physico-biogeochemical parameters such as temperature, nutrients, Chlorophyll-a (CHL-a) and Secchi depth (SD). A high negative correlation was observed between satellite-derived CHL-a and SD (rho = -0.91), similar to the in situ relationship established for several coastal gradients in the Baltic proper. We also demonstrate that the validated MERIS-based estimates and data from the SCM showed strong correlations for the variables CHL-a, SD and total nitrogen (TOTN), which improved significantly when analysed on a monthly basis across basins. The relationship between satellite-derived CHL-a and modelled TOTN was also evaluated on a monthly basis using least-square linear regression models. The predictive power of the models was strong for the period May-November (R-2: 0.58-0.87), and the regression algorithm for summer was almost identical to the algorithm generated from in situ data in Himmerfjarden bay. The strong correlation between SD and modelled TOTN confirms that SD is a robust and reliable indicator to evaluate changes in eutrophication in the Baltic proper which can be assessed using remote sensing data. Amongst all three assessed methods, only MERIS CHL-a was able to correctly depict the pattern of phytoplankton phenology that is typical for the Baltic proper. The approach of combining satellite data and physio-biogeochemical models could serve as a powerful tool and value-adding complement to the scarcely available in situ data from national monitoring programs. In particular, satellite data will help to reduce uncertainties in long-term monitoring data due to its improved measurement frequency.

  • Hieronymus, Magnus
    et al.
    SMHI, Research Department, Oceanography.
    Hieronymus, Jenny
    SMHI, Research Department, Oceanography.
    Hieronymus, Fredrik
    On the Application of Machine Learning Techniques to Regression Problems in Sea Level Studies2019In: Journal of Atmospheric and Oceanic Technology, ISSN 0739-0572, E-ISSN 1520-0426, Vol. 36, no 9, p. 1889-1902Article in journal (Refereed)
    Abstract [en]

    Long sea level records with high temporal resolution are of paramount importance for future coastal protection and adaptation plans. Here we discuss the application of machine learning techniques to some regression problems commonly encountered when analyzing such time series. The performance of artificial neural networks is compared with that of multiple linear regression models on sea level data from the Swedish coast. The neural networks are found to be superior when local sea level forcing is used together with remote sea level forcing and meteorological forcing, whereas the linear models and the neural networks show similar performance when local sea level forcing is excluded. The overall performance of the machine learning algorithms is good, often surpassing that of the much more computationally costly numerical ocean models used at our institute.

  • Molinder, Jennie
    et al.
    Körnich, Heiner
    SMHI, Research Department, Meteorology.
    Olsson, Esbjörn
    SMHI, Research Department, Meteorology.
    Hessling, Peter
    The Use of Uncertainty Quantification for the Empirical Modeling of Wind Turbine Icing2019In: Journal of Applied Meteorology and Climatology, ISSN 1558-8424, E-ISSN 1558-8432, Vol. 58, no 9, p. 2019-2032Article in journal (Refereed)
    Abstract [en]

    A novel uncertainty quantification method is used to evaluate the impact of uncertainties of parameters within the icing model in the modeling chain for icing-related wind power production loss forecasts. As a first step, uncertain parameters in the icing model were identified from the literature and personal communications. These parameters are the median volume diameter of the hydrometeors, the sticking efficiency for snow and graupel, the Nusselt number, the shedding factor, and the wind erosion factor. The sensitivity of these parameters on icing-related wind power production losses is examined. An icing model ensemble representing the estimated parameter uncertainties is designed using so-called deterministic sampling and is run for two periods over a total of 29 weeks. Deterministic sampling allows an exact representation of the uncertainty and, in future applications, further calibration of these parameters. Also, the number of required ensemble members is reduced drastically relative to the commonly used random-sampling method, thus enabling faster delivery and a more flexible system. The results from random and deterministic sampling are compared and agree very well, confirming the usefulness of deterministic sampling. The ensemble mean of the nine-member icing model ensemble generated with deterministic sampling is shown to improve the forecast skill relative to one single forecast for the winter periods. In addition, the ensemble spread provides valuable information as compared with a single forecast in terms of forecasting uncertainty. However, addressing uncertainties in the icing model alone underestimates the forecast uncertainty, thus stressing the need for a fully probabilistic approach in the modeling chain for wind power forecasts in a cold climate.

  • Frogner, Inger-Lise
    et al.
    Singleton, Andrew T.
    Koltzow, Morten O.
    Andrae, Ulf
    SMHI, Research Department, Meteorology.
    Convection-permitting ensembles: Challenges related to their design and use2019In: Quarterly Journal of the Royal Meteorological Society, ISSN 0035-9009, E-ISSN 1477-870X, Vol. 145, p. 90-106Article in journal (Refereed)
    Abstract [en]

    Challenges related to the design and use of a convection-permitting ensemble (CPEPS) are discussed. In particular the scale-dependent predictability of precipitation and the use of a CPEPS as well as its potential added value over global ensemble prediction systems (EPS) are investigated. Forecasts of precipitation from the operational CPEPS in Finland, Norway and Sweden (MEPS) are used for the investigations. It is found that predictability for scales smaller than similar to 60 km is lost rapidly within the first 6 h of the forecast with the smallest predictable scale growing more slowly to similar to 100 km over the following 18-24 h. However, there is large case-to-case variability and the ensemble perturbations fail to become fully saturated, especially in winter, suggesting a weakness in the design of the ensemble. The added value of CPEPS over deterministic forecasts and coarser resolution EPSs is discussed with summary statistics and case-studies. It is shown that the added value varies between seasons and lead times. For precipitation there is an added value for both severe precipitation events and for precipitation/no precipitation decisions. The added value is higher in summer compared to winter and for shorter lead times compared to longer lead times.

  • Törngren, Linda
    Bevarandet av mångfald: Berguv och vitryggig hackspett2017In: Vår vardag - ditt museum, Stockholm: Nordiska museets förlag, 2017, p. 226-235Chapter in book (Other academic)
  • Frisk, Tomas
    Baltic Sea science Center2017In: Vår vardag - ditt museum, Stockholm: Nordiska museets förlag, 2017, p. 224-225Chapter in book (Other academic)
  • Holmqvist, Klara
    The Nordic Museum.
    Levande kultur: trädgården på Julita gård2017In: Vår vardag - ditt museum, Stockholm: Nordiska museets förlag, 2017, p. 204-223Chapter in book (Other academic)
  • Hankin, Barry
    et al.
    Strömqvist, Johan
    SMHI, Research Department, Hydrology.
    Burgess, Chris
    Pers, Charlotta
    SMHI, Research Department, Hydrology.
    Bielby, Sally
    Revilla-Romero, Beatriz
    Pope, Linda
    A New National Water Quality Model to Evaluate the Effectiveness of Catchment Management Measures in England2019In: Water, ISSN 2073-4441, E-ISSN 2073-4441, Vol. 11, no 8, article id 1612Article in journal (Refereed)
    Abstract [en]

    This investigation reports on a new national model to evaluate the effectiveness of catchment sensitive farming in England, and how pollution mitigation measures have improved water quality between 2006 and 2016. An adapted HYPE (HYdrological Predictions for the Environment) model was written to use accurate farm emissions data so that the pathway impact could be accounted for in the land phase of transport. Farm emissions were apportioned into different runoff fractions simulated in surface and soil layers, and travel time and losses were taken into account. These were derived from the regulator's catchment change matrix' and converted to monthly load time series, combined with extensive point source load datasets. Very large flow and water quality monitoring datasets were used to calibrate the model nationally for flow, nitrogen, phosphorus, suspended sediments and faecal indicator organisms. The model was simulated with and without estimated changes to farm emissions resulting from catchment measures, and spatial and temporal changes to water quality concentrations were then assessed.

  • Public defence: 2019-11-06 13:00 Homeros (F332), Växjö
    Hemmilä, Venla
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Towards low-emitting and sustainable particleandfibreboards: Formaldehyde emission test methods and adhesives from biorefinery lignins2019Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    High volumes, fast production speed, and low material costs have been historically the driving factors of the particle- and fibreboard industries. However, in recent years the fossil-fuel dependency and health issues of the formaldehyde-containing adhesives used in the production have gained attention from both legislators and consumers. The latest example of legislation development is the change that the Federal Ministry for the Environment, Nature Conservation and Nuclear Safety of Germany  (Bundesministerium für Umwelt, Naturschutz und Nukleare Sicherheit) made to their testing method, effectively lowering the formaldehyde emission levels of wood-based panels in Germany from the European emission level of 0.1 ppm (E1, EN 717-1) to 0.05 ppm. As the emission levels of requirements decrease, market opportunities arise for formaldehyde-free bio-based adhesive systems. The aim of this thesis was thus to evaluate the different formaldehyde test methods at low emission levels (<0.05 ppm), and to explore new adhesive alternatives to the formaldehyde and petroleum-based systems used today.

    As formaldehyde emissions decrease, choosing the right measurement method becomes increasingly important. Repeatability and correlation between the main European and American formaldehyde measurement chambers, described in EN 717-1 and ASTM D 6007 standards respectively, were determined. In addition, an alternative fast factory method based on emissions was evaluated, and the effect of reducing the conditioning time before emission measurements was investigated. A literature research was conducted on different bio-based raw materials in order to review their potential, from both scientific and industrial viewpoints, as alternatives to the current petroleum-derived and formaldehyde-based adhesives. Lignin residues from biorefinery processes were chosen for further testing due to their increasing volumes and potential to suit various pathways for adhesive making. Three different biorefinery lignins were compared, and ammonium lignosulfonate was chosen for making adhesives for particleboards by using one petroleum-based and one bio-based crosslinker.

    The main conclusion of the formaldehyde emission part of the thesis was that formaldehyde emissions can be measured both accurately and quickly at low levels using chamber methods, even at factory environment. There was a good correlation between the American D 6007 and European EN 717-1 chamber methods at emission levels <0.05 ppm for both particleboards (r2 = 0.9167) and fibreboards (r2 = 0.9443). Further understanding on the effect of edge-sealing of boards and analytical methods described in the standards was obtained. It was confirmed that a fast chamber method with 1 day conditioning and 15 minutes measuring time could be used for factory formaldehyde control for most board types.

    The bio-based adhesives’ literature review revealed a large amount of studies on different sustainable adhesive systems, some of which seem promising. Both soy protein and tannin were found to be partially commercialized, with certain pre-requisites. Kraft-lignin was especially well researched, but was found to be difficult to use for other applications than partial replacement of phenol in phenol-formaldehyde (PF) adhesives due to poor water solubility and purity. Lignin residues from biorefinery processes were found to be a less studied, growing raw-material source with a lot of potential. Thus, supercritical water hydrolysis lignin (SCWH) and two biorefinery lignosulfonates were chemically and thermally characterized, and evaluated as raw materials for value-added applications, including adhesives. SCWH lignin was found to have more β-R linkages and lower amount of impurities than the lignosulfonates. High amount of phenolic hydroxyl groups indicated that SCWH would be well suited for phenol replacement in PF adhesives. The two lignosulfonates had more aliphatic hydroxyl groups, which can be interesting for other crosslinking reactions than PF. Ammonium lignosulfonate (ALS) was chosen for further evaluation as having slightly better properties than sodium lignosulfonate (SLS). ALS was combined with one bio-based crosslinker, furfuryl alcohol (FOH), and one synthetic crosslinker, 4,4’-diphenylmethane diisocyanate (pMDI), and tested as particleboard adhesive. Although in veneer tensile shear strength testing the crosslinkers worked equally well, pMDI provided significantly better results in particleboards. In addition, higher emissions than what can be expected from wood particles alone were detected from the particleboard samples crosslinked with FOH, even though FOH can be classified as non-formaldehyde added adhesive system. Further research is needed to elucidate how much the lignin contributes to the final adhesion strength when it is used together with pMDI.

    This thesis has provided new insights on formaldehyde emissions and bio-based adhesives towards healthier and more sustainable particle- and fibreboards. It has been proven that formaldehyde emissions can be measured accurately at emission levels of wood, enabling comparisons of formaldehyde-free systems. Formaldehyde-free adhesives based on a biorefinery lignin type and pMDI showed promising results for particleboards. However, these results need to be improved by different modifications of the lignin in order to bring the adhesive system to the economical and performance level required by the particleboard industry.

  • Ringholm, Karin
    The Nordic Museum.
    Walter Bauers arv: restaureringen av Örtagården2017In: Vår vardag - ditt museum, Stockholm: Nordiska museets förlag, 2017, p. 192-203Chapter in book (Other academic)
  • Womack, Anna
    The Nordic Museum.
    Hemma hos Marianne Berlinde2017In: Vår vardag - ditt museum, Stockholm: Nordiska museets förlag, 2017, p. 190-191Chapter in book (Other academic)
  • van Eldert, Jeroen
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Schunnesson, Håkan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Johansson, Daniel
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Saiang, David
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Application of Measurement While Drilling Technology to Predict Rock Mass Quality and Rock Support for Tunnelling2019In: Rock Mechanics and Rock Engineering, ISSN 0723-2632, E-ISSN 1434-453XArticle in journal (Refereed)
    Abstract [en]

    A tunnelling project is normally initiated with a site investigation to determine the in situ rock mass conditions and to generate the basis for the tunnel design and rock support. However, since site investigations often are based on limited information (surface mapping, geophysical profiles, few bore holes, etc.), the estimation of the rock mass conditions may contain inaccuracies, resulting in underestimating the required rock support. The study hypothesised that these inaccuracies could be reduced using Measurement While Drilling (MWD) technology to assist in the decision-making process. A case study of two tunnels in the Stockholm bypass found the rock mass quality was severely overestimated by the site investigation; more than 45% of the investigated sections had a lower rock mass quality than expected. MWD data were recorded in 25 m grout holes and 6 m blast holes. The MWD data were normalised so that the long grout holes with larger hole diameters and the shorter blast holes with smaller hole diameters gave similar results. With normalised MWD data, it was possible to mimic the tunnel contour mapping; results showed good correlation with mapped Q-value and installed rock support. MWD technology can improve the accuracy of forecasting the rock mass ahead of the face. It can bridge the information gap between the early, somewhat uncertain geotechnical site investigation and the geological mapping done after excavation to optimise rock support.

  • 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.

  • Lindroth, Helena
    The Nordic Museum.
    Guldknappen2017In: Vår vardag - ditt museum, Stockholm: Nordiska museets förlag, 2017, p. 188-189Chapter in book (Other academic)
  • Larsson, Marianne
    The Nordic Museum.
    Flyguniformer i rörelse2017In: Vår vardag - ditt museum, Stockholm: Nordiska museets förlag, 2017, p. 186-187Chapter in book (Other academic)