hig.sePublications
Change search
Refine search result
45678910 301 - 350 of 9456
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard-cite-them-right
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • sv-SE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • de-DE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 301.
    Angermann, Lutz
    et al.
    Technische Universität Clausthal, Institut für Mathematik, Clausthal-Zellerfeld, Germany .
    Shestopalov, Yury V.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences, Mathematics.
    Yatsyk, Vasyl V.
    O.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine, Kharkiv, Ukraine .
    Eigenmodes of linearised problems of scattering and generation of oscillations on cubically polarisable layers2015In: Inverse Problems and Applications / [ed] Larisa Beilina, Springer-Verlag New York, 2015, Vol. 120, p. 67-80Conference paper (Refereed)
    Abstract [en]

    In the frequency domain, the resonant properties of nonlinear structures are determined by the proximity of the scattering/generation frequencies of the nonlinear structures to the complex eigenfrequencies of the corresponding homogeneous linear spectral problems with the induced nonlinear permeability of the medium. Here the case of cubically polarisable, canalising, and decanalising layers is considered.

  • 302.
    Antai, Diddy
    et al.
    Karolinska Inst, Stockholm, Sweden..
    Ghilagaber, Gebrenegus
    Stockholm Univ, Stockholm, Sweden.
    Wedrén, Sara
    Karolinska Inst, Stockholm, Sweden.
    Macassa, Gloria
    Karolinska Inst, Stockholm, Sweden.
    Moradi, Tahereh
    Karolinska Inst, Stockholm, Sweden.
    Inequities in Under-Five Mortality in Nigeria: Differentials by Religious Affiliation of the Mother2009In: Journal of religion and health, ISSN 0022-4197, E-ISSN 1573-6571, Vol. 48, no 3, p. 290-304Article in journal (Refereed)
    Abstract [en]

    Observations in Nigeria have indicated polio vaccination refusal related to religion that ultimately affected child morbidity and mortality. This study assessed the role of religion in under-five (0-59 months) mortality using a cross-sectional, nationally representative sample of 7,620 women aged 15-49 years from the 2003 Nigeria Demographic and Health Survey and included 6,029 children. Results show that mother's affiliation to Traditional indigenous religion is significantly associated with increased under-five mortality. Multivariable modelling demonstrated that this association is explained by differential use of maternal and child health services, specifically attendance to prenatal care. To reduce child health inequity, these results need to be incorporated in the formulation of child health policies geared towards achieving a high degree of attendance to prenatal care, irrespective of religious affiliation.

  • 303.
    Anton, Raul
    et al.
    TECNUN, University of Navarra, Navarra, Spain.
    Jonsson, Hans
    Royal Institute of Technology (KTH), Stockholm, Sweden.
    Moshfegh, Bahram
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för energi- och maskinteknik. Division of Energy Systems, Department of Management and Engineering, Linköping University, Linköping.
    Compact CFD Modeling of EMC screen for radio base stations: a porous media approach and a correlation for the directional loss coefficients2007In: IEEE transactions on components and packaging technologies (Print), ISSN 1521-3331, E-ISSN 1557-9972, Vol. 30, no 4, p. 875-885Article in journal (Refereed)
    Abstract [en]

    A methodology to obtain the directional pressure loss coefficients in a porous media model of an electromagnetically compatible screen of a radio base station model is presented. The directional loss coefficients of this compact model are validated against a detailed computational fluid dynamics model not only by comparing the total pressure drop, but also by evaluating the flow pattern after the screen. The detailed model was validated in an earlier article by the authors. A parametric study is conducted for 174 cases. Seven parameters were investigated: velocity, inlet height, screen porosity, printed circuit board (PCB) thickness, inlet-screen gap, distance between two PCBs and screen thickness. Based on the compact model parametric study, two correlations for the directional loss coefficients are developed as a function of the Reynolds number and the above geometrical parameters. The average disagreement between the compact model that uses the directional loss coefficients from the correlations and the detailed model was of 3% for the prediction of the total pressure drop and less than 6.5% and 9.5% for two coefficients that accurately characterize the flow pattern.

  • 304.
    Antoniou, Nestoras
    et al.
    Department of Civil and Environmental Engineering, University of Cyprus, Nicosia, Cyprus; Department of the Built Environment, Eindhoven University of Technology, Eindhoven, The Netherlands.
    Montazeri, Hamid
    Department of the Built Environment, Eindhoven University of Technology, Eindhoven, The Netherlands; Department of Civil Engineering, KU Leuven, Leuven, Belgium.
    Wigö, Hans
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system.
    Neophytou, Marina
    Department of Civil and Environmental Engineering, University of Cyprus, Nicosia, Cyprus.
    Blocken, Bert
    Department of the Built Environment, Eindhoven University of Technology, Eindhoven, The Netherlands; Department of Civil Engineering, KU Leuven, Leuven, Belgium.
    Sandberg, Mats
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system.
    CFD and wind-tunnel analysis of outdoor ventilation in a real compact heterogeneous urban area: evaluation using “air delay”2017In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 126, p. 355-372Article in journal (Refereed)
    Abstract [en]

    Outdoor urban ventilation in a real complex urban area is investigated by introducing a new ventilation indicator – the "air delay". Computational Fluid Dynamics (CFD) simulations are performed using the 3D steady Reynolds-Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES) approaches. The up-to-date literature shows the lack of detailed evaluations of the two approaches for real compact urban areas. This study further presents a systematic evaluation of steady RANS and LES for the assessment of the ventilation conditions in a dense district in Nicosia, Cyprus. The ventilation conditions within the urban area are investigated by calculating the distribution of the age of air. To better assess the outdoor ventilation, a new indicator, the "air delay" is introduced as the difference between the local mean age of air at an urban area and that in an empty domain with the same computational settings, allowing the comparison of the results in different parts of the domain, without impact of the boundary conditions. CFD results are validated using wind-tunnel measurements of mean wind speed and turbulence intensity performed for the same urban area. The results show that LES can accurately predict the mean wind speed and turbulence intensity with the average deviations of about 6% and 14%, respectively, from the wind-tunnel measurements while for the steady RANS, these are 8% and 31%, respectively. The steady RANS simulations overestimate the local mean air delay. The deviation between the two approaches is 52% at pedestrian level (2 m).

  • 305.
    Antón, Raul
    et al.
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för energi- och maskinteknik. Department of Mechanical Engineering, TECNUN, University of Navarra, Navarra, Spain; Division of Applied Thermodynamics and Refrigeration, KTH Energy Technology, Royal Institute of Technology, Stockholm, Sweden.
    Jonsson, Hans
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för energi- och maskinteknik. Division of Applied Thermodynamics and Refrigeration, KTH Energy Technology, Royal Institute of Technology, Stockholm, Sweden.
    Moshfegh, Bahram
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för energi- och maskinteknik.
    Detailed CFD Modelling of EMC Screens for Radio Base Stations: A Parametric Study2009In: IEEE transactions on components and packaging technologies (Print), ISSN 1521-3331, E-ISSN 1557-9972, Vol. 32, no 1, p. 145-155Article in journal (Refereed)
    Abstract [en]

    The objective of this paper is to make a parametric study of the hydraulic resistance and flow pattern of the flow after an electromagnetic compatibility screen and between two printed circuit boards (PCBs) in a model of a 90 degrees subrack cooling architecture. The parametric study is carried out using a detailed 3-D model of a PCB slot. The detailed model was experimentally validated in a previous paper by the authors. Seven parameters were investigated: velocity, inlet height, screen porosity, PCB thickness, distance between two PCBs, inlet-screen gap and screen thickness. A correlation for the static and dynamic pressure drop, the percentage of dimensionless wetted area, A(omega)*, and the RMS* factor (a function of the How uniformity along the PCB) after the screen is reported as a function of six geometrical dimensionless parameters and the Reynolds number. The correlations, that are based on 174 three dimensional simulations, yield good results for the total pressure drop, in which the values are predicted within the interval of +/- 15%. For the, A(omega)*, all the predicted values are within the interval of +/- 22% of the observed values. Finally, for the RMS* factor, the majority of the values also have a disagreement of less than 20% of the observed values. These last two parameters are believed to provide a correct insight about the flow pattern after the screen.

  • 306.
    Antón, Raúl
    et al.
    Department of TECNUN, University of Navarra, Navarra, Spain.
    Jonsson, Hans
    Royal Institute of Technology, Stockholm.
    Moshfegh, Bahram
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för energi- och maskinteknik. Division of Energy Systems, Department of Management and En- gineering, Linköping University, Linköping, Sweden.
    Detailed CFD modeling of EMC screen for radio base stations: a benchmark study2007In: IEEE transactions on components and packaging technologies (Print), ISSN 1521-3331, E-ISSN 1557-9972, Vol. 30, no 4, p. 754-763Article in journal (Refereed)
    Abstract [en]

    The objective of this paper is to investigate the performance of five well-known turbulence models, in order to find a model that predicts the details of the flow patterns through an electromagnetic compatibility (EMC) screen. The turbulence models investigated in the present study are five different eddy-viscosity models; the standard k-epsilon model, the renormalization group (RNG) k-epsilon model, the realizable k-epsilon model, the standard k-omega model, as well as the shear stress transport k-w model. A steady-state 3-D detailed model, which serves as the most accurate representation of the model, was used in order to evaluate the details of the airflow paths and pressure field. The flow was assumed to be isothermal, turbulent and incompressible. A general model that covers a considerable range of velocities and geometries was validated experimentally by wind tunnel measurements. The result shows that for most of the k-epsilon models used with correct y(+) and mesh strategy, the pressure drop and the velocity field deviation is small compared to experimental data. The k-omega models overpredict the overall pressure drop. When using the RNG k-epsilon model, the total static pressure drop predicted differs around 5%-10% and the average velocity deviation at several locations before and after the screen is around 5%.

  • 307.
    Antón, Raúl
    et al.
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för energi- och maskinteknik. Royal Institute of Technology, Stockholm, Sweden; TECHUN, University of Navarra, San Sebastián, Spain.
    Jonsson, Hans
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för energi- och maskinteknik. Royal Institute of Technology, Stockholm, Sweden.
    Moshfegh, Bahram
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för energi- och maskinteknik.
    Detailed CFD modelling of EMC screen for radio base stations: A conjugate heat transfer problem2007In: International Journal of Heat Exchangers, ISSN 1524-5608, Vol. 8, no 1, p. 95-116Article in journal (Refereed)
    Abstract [en]

    The objective of this paper is to perform an experimental as well as CFD investigations of the conjugate heat transfer problem in a sub-rack slot model. A steady-state three-dimensional detailed model, which serves as the most accurate representation of the model, was used in order to evaluate the details of the airflow paths and temperature field. A general model that covers a considerable range of velocities, screen porosities and heat fluxes was validated experimentally by wind tunnel measurements. The result shows that the RNG k-ε model used with correct y+ and mesh strategy accurately predicts the temperature field. The average temperature deviation at several locations is less than 4% compared to experimental data. The influence of the velocity, screen porosity, heat flux and presence of the EMC screen on the PCB temperature field is commented. © 2007 R.T. Edwards, Inc.

  • 308.
    Antón Remírez, Raúl
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för energi- och maskinteknik.
    Experimental and numerical study of the thermal and hydraulic effect of EMC screens in radio base stations: detailed and compact model2006Doctoral thesis, monograph (Other scientific)
    Abstract [en]

    Today’s telecommunication cabinets use Electro Magnetic Compliance (EMC) screens in order to reduce electromagnetic noise that can cause some miss functions in electronic equipment.

    Many radio base stations (RBSs) use a 90-degree building architecture: the flow inlet is perpendicular to the EMC screen, which creates a complex flow, with a 90-degree air turn, expansions, compressions, perforated plates and PCBs. It is of great interest to study how the EMC screen interacts with the rest of components and analyze the total pressure drop and how much the flow pattern changes due to the placement of the screen.

    Velocity, pressure and temperature measurements as well as flow pattern visualizations have been carried out to gain good insight into the flow and heat transfer characteristics in a subrack model of an RBS. Furthermore, these measurements have been very useful for validating detailed CFD models and evaluating several turbulence models.

    Nowadays, industrial competition has caused a substantial decrease in the time-to-market of products. This fact makes the use of compact models in the first stages of the design process of vital importance. Accurate and fast compact models can to a great extent decrease the time for design, and thus for production.

    Hence, to determine the correlations between the pressure drop and flow pattern on the PCBs as a function of the geometry and the Reynolds number, based on a detailed CFD parametric study, was one objective. Furthermore, the development of a compact model using a porous media approach (using two directional-loss coefficients) has been accomplished. Two correlations of these directional loss coefficients were found as a function of the geometry and Reynolds number.

  • 309. Appelqvist, Tomas
    Religion i svensk läroplanshistoria: utvecklingslinjer i uppfattningen om människan som etiskt och politiskt subjekt2015In: Det postsekulära klassrummet: mot ett vidgat religionskunskapsbegrepp / [ed] David Carlsson & Peder Thalén, Gävle: Högskolan i Gävle , 2015, p. 109-133Chapter in book (Other academic)
  • 310.
    Arenhall, Eva
    et al.
    Örebro universitet.
    Kristofferzon, Marja-Leena
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Nursing science.
    Sexualitet och parrelation vid hjärtsjukdom2012In: Kardiologisk omvårdnad / [ed] Bengt Fridlund, Dan Malm, Jan Mårtensson, Lund: Studentlitteratur, 2012, 2, p. 403-416Chapter in book (Other academic)
  • 311.
    Arenhall, Eva
    et al.
    Örebro University Hospital, Department of Cardiology.
    Kristofferzon, Marja-Leena
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Nursing science. Department of Public Health and Caring Sciences, Section of Caring Sciences, Uppsala University, Uppsala, Sweden.
    Fridlund, Bengt
    School of Health Sciences, Jönköping University; Linnaeus University, Växjö, Sweden.
    Malm, Dan
    School of Health Sciences, Jönköping University; County Hospital Ryhov, Jönkoping, Sweden.
    Nilsson, Ulrica
    Department of Anesthesia and Intensive Care, Örebro University.
    The male partners' experiences of the intimate relationships after a first myocardial infarction2011In: European Journal of Cardiovascular Nursing, ISSN 1474-5151, E-ISSN 1873-1953, Vol. 10, no 2, p. 108-114Article in journal (Refereed)
    Abstract [en]

    Background: Stress in the intimate relationship is found to worsen the prognosis in women suffering from myocardial infarction (MI). Little is known about how male spouses experience the intimate relationship.

    Aim: This study aimed to explore and describe the experience of men’s intimate relationships in connection to and after their female partner’s first MI.

    Methods: An explorative and qualitative design was used. Interviews were conducted with 16 men having a partner who the year before had suffered a first MI. The data were analysed with qualitative content analysis.

    Results: Three themes emerged: masculine image challenged; life takes another direction; and life remains unchanged. The men were forced to deal with an altered image of themselves as men, and as sexual beings. They were hesitant to approach their spouse in the same way as before the MI because they viewed her to be more fragile. The event also caused them to consider their own lifestyle, changing towards healthier dietary and exercise habits.

    Conclusions: After their spouse’s MI, men experienced a challenge to their masculine image. They viewed their spouse as being more fragile, which led the men to be gentler in sexual intimacy and more hesitant to invite sexual activity. This knowledge about how male spouses experience the intimate relationship could be helpful for health personnel in hospitals and primary care when they interact with couples where the woman suffers from cardiac disease or other chronic disorders.

  • 312.
    Arenhall, Eva
    et al.
    Örebro universitet.
    Kristofferzon, Marja-Leena
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Nursing science. Department of Public Health and Caring Sciences, Section of Caring Sciences, Uppsala University, Uppsala.
    Fridlund, Bengt
    Hälsohögskolan Jönköping.
    Nilsson, Ulrica
    Örebro universitet.
    The female partners' experiences of intimate relationship after a first myocardial infarction2011In: Journal of Clinical Nursing, ISSN 0962-1067, E-ISSN 1365-2702, Vol. 20, no 11-12, p. 1677-1684Article in journal (Refereed)
    Abstract [en]

    Aim.

    This study aimed to explore and describe women’s experience of intimate relationships in connection to and after their partner’s first myocardial infarction.

     

    Background.

    Support from partners is important for recovery, but little is known about partners’ experience of intimate relationships after myocardial infarction.

     

    Design.

    The study used an explorative, qualitative design.

     

    Methods.

    The first author interviewed 20 women having a partner who had suffered a first myocardial infarction during the preceding year. Qualitative content analysis was used to analyse the data.

     

    Findings.

    Three themes emerged: ‘limited life space’, ‘sense of life lost’ and ‘another dimension of life’. The women described how their self-assumed responsibility led to a more stifling and limited life. Their sense of life lost was described in terms of deficits and feeling the loss. The women also described experiencing another dimension of life characterised by three subthemes: ‘uncertainty of life’, ‘certain of relationship’ and ‘share life more’.

     

    Conclusions.

    The partners’ myocardial infarction had an impact on the interviewees’ intimate relationships; they suffered a major loss and missed their ‘former’ partner, both emotionally and sexually. They struggled with the new asymmetry in their intimate relationship and felt compelled to adapt to their partners’ lack of sexual desire or function. Also, their partner controlled them, which lead towards a stifling, more limited life space.

     

    Relevance to clinical practice.

    Caregivers in hospital and primary care settings could apply the findings in their efforts to help couples recover or maintain intimate relationships following myocardial infarction.

  • 313.
    Areskoug, Linn
    University of Gävle, Faculty of Education and Business Studies, Department of Humanities, Literature science. Uppsala universitet, Litteraturvetenskapliga institutionen.
    Den svenske mannens gränsland: Manlighet, nation och modernitet i Sven Lidmans Silfverstååhlsvit2011Doctoral thesis, monograph (Other academic)
    Abstract [en]

    This thesis deals with the nationalistic imaginary in the novels of Sven Lidman, published 1910–1913. The novels hold forth a conservative point-of-view that embraces the bourgeois ideal of masculinity and the idea of the healthy, Swedish rural way of life as opposed to the destructive metropolis. This dualism is part of a dichotomy that structures the novels. It also entails continuity/fragmentation, the Swedish/the foreign, men/women, activity/ passivity as well as masculinity/femininity and unmanliness.

    In the Silfverstååhl-cycle the protagonists are young men of a noble, Swedish family. They progress from lost and introspective youths to grown men who are deeply concerned with and engaged in society. They are different representatives of the Swedish man – the farmer, the business man, the explorer and the clergy man. What unites them is how their “coming of age” develops, how through trial and struggle they become stronger and prove worthy of the manly role they finally take on. This is a major principle of the bourgeois masculinity that is also closely connected to the national identity of the men.

    There is also an ambiguity concerning modernity. Throughout the novels a critique of modern society is formulated, that acknowledges the modern age but simultaneously takes on a prudent attitude towards modern society. There is no going back for the Swedish nation; the modern times have to be confronted. The present is very important since it is the time for scrutiny. The handling of the modern era takes place in the developing processes of the young men, who have to be careful not to get trapped in the modern whirlpool that threatens to shatter the human being. The past, the familiar and the rural anchorage that the family relation entitles, is a defense against the destructive forces of modernity. But the past is not completely beneficial. Even though the past is of major importance to the national identity of the protagonists, they have to be very careful not to delve too much into the past because of the risk of paralysis and effeminization. In the nationalistic narrative the present encapsulates the past and the future. The Swedish man has to navigate in the borderland of modernity.

  • 314.
    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.

  • 315.
    Arfwedson, Gerhard
    Lärarhögskolan i Stockholm.
    Lek, musik, könsroller och centrala begrepp: fyra exempel på sociala konstruktioner2003Collection (editor) (Other academic)
  • 316.
    Arfwedson, Gerhard
    University of Gävle, Department of Education and Psychology, Ämnesavdelningen för didaktik.
    Mellan praktik och teori: tio didaktiska berättelser om undervisning2002Collection (editor) (Other (popular science, discussion, etc.))
  • 317.
    Arghand, Taha
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system.
    Karimipanah, Taghi
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system.
    Awbi, Hazim
    School of Construction Management and Engineering, University of Reading, United Kingdom.
    Cehlin, Mathias
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system.
    Larsson, Ulf
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system.
    Linden, Elisabet
    University of Gävle, Faculty of Engineering and Sustainable Development, BMG laboratory.
    An experimental investigation of the flow and comfort parameters for under-floor, confluent jets and mixing ventilation systems in an open-plan office2015In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 92, p. 48-60Article in journal (Refereed)
    Abstract [en]

    There is a new trend to convert the workplaces from individual office rooms to open offices for motivating money saving and better communication. With such a shift the ability of existing ventilation systems in meeting the new requirements is a challenging question for researchers. The available options could have an impact on workers' health in terms of providing acceptable levels of thermalcomfort and indoor air quality. Thus, this experimental investigation focuses on the performances of three different air distribution systems in an open-plan office space. The investigated systems were: mixing ventilation with ceiling-mounted inlets, confluent jets ventilation and underfloor air distribution with straight and curved vanes. Although this represents a small part of our more extensiveexperimental investigation, the results show that all the purposed stratified ventilation systems (CJV and UFAD) were more or less behaving as mixing systems with some tendency for displacement effects. Nevertheless, it is known that the mixing systems have a stable flow pattern but has the disadvantage of mixing contaminated air with the fresh supplied air which may produce lower performance and in worst cases occupants' illness. For the open-plan office we studied here, it will be shown that the new systems are capable of performing better than the conventional mixing systems. As expected, the higher air exchange efficiency in combination with lower local mean age of air for corner-mounted CJV and floor-mounted UFAD grills systems indicates that these systems are suitable for open-plan offices and are to be favored over conventional mixing systems.

  • 318. Arlinger, Stig
    et al.
    Hagerman, Björn
    Kjellberg, Anders
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för inomhusmiljö.
    Kähäri, Kim
    Landström, Ulf
    Poulsen, Torben
    Musik och höga ljudnivåer: praktiska riktlinjer för musik- och underhållningsbranschen2009Report (Other academic)
  • 319. Arlinger, Stig
    et al.
    Kjellberg, Anders
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för inomhusmiljö.
    Landström, Ulf
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för inomhusmiljö.
    Kähäri, Kim
    Hagerman, Björn
    Poulsen, Torben
    Bengtsson, Johanna
    Musik, musiker och hörsel: en kunskapssammanställning om höga ljudnivåer och hörselskaderisker i musik- och underhållningssektorn2007Report (Other academic)
  • 320.
    Arnell, Susann
    et al.
    University Health Care Research Center, Faculty of Medicine and Health, Örebro University, Örebro, Sweden. .
    Jerlinder, Kajsa
    University of Gävle, Faculty of Health and Occupational Studies, Department of Public Health and Sport Science, Sports Science.
    Lundqvist, Lars- Olov
    University Health Care Research Center, Faculty of Medicine and Health, Örebro University, Örebro, Sweden. .
    Parents’ Experiences of Physical Activity Participation among Adolescents with an Autism Spectrum Disorder2019In: Article in journal (Refereed)
  • 321.
    Arnell, Susann
    et al.
    University Health Care Research Center (UFC), Region Örebro County, Örebro, Sweden.
    Jerlinder, Kajsa
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Sports science.
    Lundqvist, Lars-Olov
    University Health Care Research Center (UFC), Region Örebro County, Örebro, Sweden.
    Participation in physical activities: a multilevel challenge for adolescents with autism spectrum disorders2017In: Developmental Medicine & Child Neurology, ISSN 0012-1622, E-ISSN 1469-8749, Vol. 59, no S2, p. 8-8Article in journal (Other academic)
    Abstract [en]

    Introduction: Physical inactivity is one of the biggest current public health problems. Few adolescents with autism spectrum disorder (ASD) achieve the recommendation of daily physical activity (PA). The reasons for not being physically active depend on several complex factors, yet not comprehensively described from the adolescents’point of view. The absence of their perspective means that intervention strategies for health enhancing physical activity may not encompass the experiences of the adolescents themselves. Therefore the purpose of this study was to develop an understanding of the perceptions, experiences and reflections of adolescents with ASDs’participation in PA.

    Participants and methods: Twenty-four adolescents, diagnosed with ASD without a co-occurring intellectual disability, aged 12-16 years, participated in the study.Data was collected using qualitative interviews and inductively analyzed using qualitative content analysis.

    Results: Adolescents with ASD were a heterogeneous group in regard to their current PA habits and preferences. Their willingness to participate in PA was conditioned regarding; what, where, when and with whom. They described challenges in the activity and the social context during PA, especially during the mandatory physical education. Perceived demands, freedom of choice, physical ability and sense of control affected their PA participation.

    Conclusion: Findings indicate that the adolescents’willingness to participate was associated with interacting and individual-related conditions, which can be misinterpreted as unwillingness to participate in PA. Thus aspects of autonomy and knowledge about individual conditions and needs have to be recognized when intervention strategies for health enhancing physical activities are planned for this population.

  • 322.
    Arnell, Susann
    et al.
    Faculty of Medicine and Health, University of Health Care Research Center, Örebro University; School of Health Sciences, The Swedish Insititute for Disability Research (SIDR), Örebro University, Örebro Sweden.
    Jerlinder, Kajsa
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Sports science. School of Health Sciences, The Swedish Institute for Disability Research (SIDR), Örebro University Sweden.
    Lundqvist, Lars-Olov
    Faculty of Medicine and Health, University of Health Care Research Center, Örebro University; School of Health Sciences, The Swedish Insititute for Disability Research (SIDR), Örebro University, Örebro Sweden.
    Perceptions of Physical Acitivty Participation Among Adolescents with Autism Spectrum Disorders: A Conceptual Model of Conditional Participation2018In: Journal of autism and developmental disorders, ISSN 0162-3257, E-ISSN 1573-3432, Vol. 48, no 5, p. 1792-1802, article id 29236210Article in journal (Refereed)
    Abstract [en]

    Adolescents with an autism spectrum disorder (ASD) are less physically active compared to typically developing peers. The reasons for not being physically active are complex and depend on several factors, which have not been comprehensively described from the adolescent’s perspective. Therefore, the aim was to describe how adolescents with an ASD perceive, experience and reflect on their participation in physical activity. Interviews with 24 adolescents diagnosed with high-functioning ASD, aged 12–16 years, were analysed with qualitative content analysis with an inductive approach. They expressed a variety of reasons determining their willingness to participate, which were conceptualized as: Conditional participation in physical activities. The present study presents an alternative perspective on participation in physical activity, with impact on intervention design.

  • 323. Arnemo, Ulf
    et al.
    Bengtsson, Lars
    University of Gävle, Center for Logistics and Innovative Production. University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Management, Industrial Design and Mechanical Engineering, Industrial Management.
    Berggren, Christian
    Linköpings universitet.
    Hansson, Stefan
    Holmberg, Gunnar
    Karabag, Solmaz Filiz
    Karlsson, Mats
    Larsson, Bengt
    Rencrantz, Daniel
    Sigfridsson, Erik
    Stefan, Ioana
    University of Gävle, Center for Logistics and Innovative Production.
    Wang, Wiehong
    Rapid innovators in emerging economies: Challenges and opportunities for Swedish firms2016Report (Other academic)
  • 324. Aronsson, Tomas
    et al.
    Daunfeldt, Sven-Olov
    University of Gävle, Department of Business Administration and Economics, Ämnesavdelningen för nationalekonomi.
    Wikström, Magnus
    Estimating Intrahousehold Allocation in a Collective Model with Houasehold Production2001In: Journal of Population Economics, ISSN 0933-1433, E-ISSN 1432-1475, Vol. 14, no 4, p. 569-584Article in journal (Refereed)
    Abstract [en]

    The purpose of this paper is to estimate the intra-family distribution of income and the individual demand for leisure and household production from Swedish cross-sectional household data. As a basis for the analysis, we use a collective model where each individual is characterized by his or her own utility function and divides total time between leisure, household production and market work. For the purpose of comparison, we also estimate a version that is consistent with a more traditional model of labor supply, the unitary model.

  • 325.
    Arushanyan, Yevgeniya
    et al.
    Division of Environmental Strategies Research, Department of Sustainable development, Environmental Science and Engineering, School of Architecture and Built Environment, KTH Royal Institute of Technology, Stockholm, Sweden.
    Bjorklund, Anna
    Division of Environmental Strategies Research, Department of Sustainable development, Environmental Science and Engineering, School of Architecture and Built Environment, KTH Royal Institute of Technology, Stockholm, Sweden.
    Eriksson, Ola
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Environmental engineering.
    Finnveden, Göran
    Division of Environmental Strategies Research, Department of Sustainable development, Environmental Science and Engineering, School of Architecture and Built Environment, KTH Royal Institute of Technology, Stockholm, Sweden.
    Soderman, Maria Ljunggren
    Division of Environmental Systems Analysis, Department of Energy and Environment, Chalmers University of Technology, Göteborg, Sweden.
    Sundqvist, Jan-Olov
    IVL Swedish Environmental Research Institute, Stockholm, Sweden.
    Stenmarck, Åsa
    IVL Swedish Environmental Research Institute, Stockholm, Sweden.
    Environmental Assessment of Possible Future Waste Management Scenarios2017In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 10, no 2, article id 247Article in journal (Refereed)
    Abstract [en]

    Waste management has developed in many countries and will continue to do so. Changes towards increased recovery of resources in order to meet climate targets and for society to transition to a circular economy are important driving forces. Scenarios are important tools for planning and assessing possible future developments and policies. This paper presents a comprehensive life cycle assessment (LCA) model for environmental assessments of scenarios and waste management policy instruments. It is unique by including almost all waste flows in a country and also allow for including waste prevention. The results show that the environmental impacts from future waste management scenarios in Sweden can differ a lot. Waste management will continue to contribute with environmental benefits, but less so in the more sustainable future scenarios, since the surrounding energy and transportation systems will be less polluting and also because less waste will be produced. Valuation results indicate that climate change, human toxicity and resource depletion are the most important environmental impact categories for the Swedish waste management system. Emissions of fossil CO2 from waste incineration will continue to be a major source of environmental impacts in these scenarios. The model is used for analyzing environmental impacts of several policy instruments including weight based collection fee, incineration tax, a resource tax and inclusion of waste in a green electricity certification system. The effect of the studied policy instruments in isolation are in most cases limited, suggesting that stronger policy instruments as well as combinations are necessary to reach policy goals as set out in for example the EU action plan on circular economy.

  • 326.
    Arvidsson, Inger
    et al.
    Division of Occupational and Environmental Medicine, University Hospital, Lund, Sweden.
    Hansson, Gert-Ake
    Division of Occupational and Environmental Medicine, University Hospital, Lund, Sweden.
    Mathiassen, Svend Erik
    University of Gävle, Centre for Musculoskeletal Research.
    Skerfving, Staffan
    Division of Occupational and Environmental Medicine, University Hospital, Lund, Sweden.
    Neck postures in air traffic controllers with and without neck/shoulder disorders2008In: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 39, no 2, p. 255-260Article in journal (Refereed)
    Abstract [en]

    Prolonged computer work with an extended neck is commonly believed to be associated with an increased risk of neck-shoulder disorders. The aim of this study was to compare neck postures during computer work between female cases with neck-shoulder disorders, and healthy referents. Based on physical examinations, 13 cases and 11 referents were selected among 70 female air traffic controllers with the same computer-based work tasks and identical work stations. Postures and movements were measured by inclinometers, placed on the forehead and upper back (C7/Th1) during authentic air traffic control. A recently developed method was applied to assess flexion/extension in the neck, calculated as the difference between head and upper back flexion/extension. Results: Cases and referents did not differ significantly in neck posture (median neck flexion/extension: -10° vs. -9°; p=0.9). Hence, the belief that neck extension posture is associated with neck-shoulder disorders in computer work is not supported by the present data

  • 327.
    Arvidsson, Inger
    et al.
    Department of Occupational and Environmental Medicine, Lund University Hospital, Lund, Sweden.
    Hansson, Gert-Åke
    Department of Occupational and Environmental Medicine, Lund University Hospital, Lund, Sweden.
    Mathiassen, Svend Erik
    University of Gävle, Centre for Musculoskeletal Research. University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science.
    Skerfving, Staffan
    Department of Occupational and Environmental Medicine, Lund University Hospital, Lund, Sweden.
    Changes in physical workload with implementation of mouse-based information technology in air traffic control2006In: International Journal of Industrial Ergonomics, ISSN 0169-8141, E-ISSN 1872-8219, Vol. 36, no 7, p. 613-622Article in journal (Refereed)
    Abstract [en]

    Effects on physical workload were quantified when introducing new information technology in air traffic control. Seven female and seven male air traffic controllers were studied in an old control system, and during simulated - but similar - work in a new, mouse-based system. Postures, movements and muscular load were recorded (inclinometry for head, neck, back and upper arms; goniometry for wrists; electromyography for the trapezius and forearm extensor muscles). The new system was associated with lower movement velocities than the old one (examples; [50th percentiles] head flexion: 2 vs. 5 o/s, P<0.01; right arm elevation: 3 vs. 6 o/s; P<0.01; [90th percentile] wrist flexion: 19 vs. 50 o/s, P<0.01), less varying postures (head: 95th-5th percentile range 17° vs. 34o; P<0.01), and less muscular rest in the right forearm extensors (3.5 vs. 9% of time; P<0.05). The old/new system differences were amplified at high work intensities. The new air traffic control system caused a major change of physical exposures, probably associated with an increased risk of musculoskeletal disorders in arms and hands.

    Relevance to industry

    While this study concerned the specific changes in the introduction of a new air traffic control system, we believe that the findings are applicable to similar technological developments in other settings.

  • 328. Arvidsson, Inger
    et al.
    Hansson, Gert-Åke
    Mathiassen, Svend Erik
    University of Gävle, Belastningsskadecentrum.
    Skerfving, Staffan
    "Gamnacke" och nackbesvär vid datorarbete: finns det något samband?2005In: Svenska Läkaresällskapets Riksstämma, 2005Conference paper (Other academic)
  • 329. Arvidsson, Inger
    et al.
    Hansson, Gert-Åke
    Mathiassen, Svend-Erik
    University of Gävle, Centre for Musculoskeletal Research.
    Skerfving, S
    Physical workload and musculoskeletal disorders in computerized work, among air traffic controllers2007In: Work With Computing Systems - WWCS 2007, Stockholm: abstracts WWCS 2007 : Computing systems for human benefits from the 8th International Conference on Work With Computing Systems : May 21st-24th 2007, Stockholm Sweden, Stockholm: Royal institute of technology , 2007, p. 42-42Conference paper (Other (popular science, discussion, etc.))
  • 330. Arvidsson, Inger
    et al.
    Hansson, Gert-Åke
    Mathiassen, Svend-Erik
    University of Gävle, Centre for Musculoskeletal Research.
    Skerfving, Staffan
    Are neck-shoulder disorders associated with habitual neck extension in computer work?2006In: Meeting diversity in ergonomics: IEA 2006, 16th World Congress on Ergonomics / [ed] Pikaar R N, Koningsveld E A P, Settels P J M, 2006Conference paper (Other academic)
    Abstract [en]

    A common clinical conception is that prolonged neck extension during computer work is associated with an increased risk of neck-shoulder disorders. The aim of this study was to find out whether neck postures in computer work differed between females cases with neck-shoulderdisorders, compared to healthy referents.

    Based on physical examinations, 13 cases and 11 referents were selected among 70 female air traffic controllers with the same computer work and identical work stations. Neck angles were measured by inclinometry, during an ordinary work period of about 1 h. Results: Average neck angles (50thpercentile) in cases and referents was -10° (SP 8) and -9 (SD 10) respectively; p=0.9. Hence, we did not find any association between neck-shoulder disorders and neck extension during computer work.

  • 331.
    Arvidsson, Karin
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för industriell ekonomi.
    Att ändra examinationsform: fokus på lärandet men dilemma att betygssätta2004In: Kunskap och lärande i den högre utbildningen: lärarreflexioner från praktiken / [ed] Sara Dahlström och Göran Fransson, Gävle: Högskolan i Gävle , 2004, p. 12-18Chapter in book (Other (popular science, discussion, etc.))
  • 332.
    Arvidsson, Karin
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för industriell ekonomi.
    Environmental management at Swedish universities2004In: International Journal of Sustainability in Higher Education, ISSN 1467-6370, E-ISSN 1758-6739, Vol. 5, no 1, p. 91-99Article in journal (Refereed)
    Abstract [en]

    Since1996, all Swedish public authorities, which includes most universities, have been made responsible for contributing to the sustainable development of the society. Swedish universities are thus required to submit annual environmental reports about their policies, structures and actions. This study provides a review of the activities that Swedish universities have undertaken so far. Reports from the year 2000 show that all 25 participating universities conducted the first environmental review. Most universities stopped there, although one – Mälardalen University – has gone all the way to ISO 14001 certification. The findings of the study suggest that universities, which have been participating for some years in the project, are further along the line than those that joined recently. There is also some indication that environmental-management-system (EMS) work is easier for the smaller universities, which can mobilise around a single goal.

  • 333.
    Asami - Johansson, Yukiko
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences, Mathematics.
    A study of a problem solving oriented lesson structure in mathematics in Japan2011In: Proceedings of the  seventh Congress  of  the  European  Society  for  Research  in Mathematics Education (CERME 7), Rzeszów, Poland.: Universitetsforlaget, 2011Conference paper (Refereed)
    Abstract [en]

    This paper presents and analyses “Mondaikaiketsu no jugyou” which translates to “the problem solving oriented – approach”.  It is a set of didactic techniques with the aim of motivating the students’ positive attitude toward engaging in mathematical activities and fostering mathematical thinking. As an analytical tool, The Anthropological Theory of Didactics (ATD) will be applied.

  • 334.
    Asami - Johansson, Yukiko
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences, Mathematics.
    Applying problem solving oriented lesson structure in Swedish lower secondary school: With a viewpoint of the anthropological theory of didactics (ATD)2011In: Proceedings of the 44th congress of Japanese mathematical education / [ed] Japanese society for research in mathematics education, Tokyo: Japanese society for research in mathematics education , 2011, p. 1051-1052Conference paper (Refereed)
  • 335.
    Asami-Johansson, Yukiko
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electrical Engineering, Mathematics and Science, Mathematics.
    Conditions and constraints for transferring Japanese structured problem solving to Swedish mathematics classroom2019In: Article in journal (Refereed)
  • 336.
    Asami-Johansson, Yukiko
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences, Mathematics. Linköpings universitet, Matematiska institutionen.
    Designing Mathematics Lessons Using Japanese Problem Solving Oriented Lesson Structure: A Swedish case study2015Licentiate thesis, monograph (Other academic)
    Abstract [en]

    This licentiate thesis is concerned with applying the Japanese problem solving oriented (PSO) teaching approach to Swedish mathematics classrooms. The overall aim of my research project is to describe and investigate the viability of PSO as design tool for teaching mathematics. The PSO approach is a variation of a more general Japanese teaching paradigm referred to as “structured problem solving”. These teaching methods aim to stimulate the process of students’ mathematical thinking and have their focus on enhancing the students’ attitudes towards engaging in mathematical activities. The empirical data are collected using interviews, observations and video recordings over a period of nine months, following two Swedish lower secondary school classes. Chevallard’s anthropological framework is used to analyse which mathematical knowledge is exposed in the original Japanese lesson plans and in the lessons observed in the classrooms. In addition, Brousseau’s framework of learning mathematics is applied to analyse the perception of individual students and particular situations in the classroom.

    The results show that the PSO based lesson plans induce a complex body of mathematical knowledge, where different areas of mathematics are linked. It is found that the discrepancy between the Japanese and Swedish curriculum cause some limitations for the adaptation of the lesson plans, especially in the area of Geometry. Four distinct aspects of the PSO approach supporting the teaching of mathematics are presented.

  • 337.
    Asami-Johansson, Yukiko
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electrical Engineering, Mathematics and Science, Mathematics.
    Japanese Mathematics Teachers’ Professional Knowledge: International case studies based on praxeological analysis2019Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The thesis describes and studies the Japanese mathematics teachers’ professional knowledge and its dissemination. This theme is investigated in several concrete situations: the knowledge of teaching practice of school mathematics taught in the teacher education, the relation between the educational goals described in the national curriculum and concrete teaching methods discussed among the Japanese lower secondary teachers in service. The thesis investigates also critical phenomena, which arise in an attempt to transfer the Japanese teaching practice in a different teaching context.

  • 338.
    Asami-Johansson, Yukiko
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electrical Engineering, Mathematics and Science, Mathematics. University of Copenhagen, Copenhagen, Denmark.
    The Didactic Notion of “Mathematical Activity” in Japanese Teachers’ Professional Scholarship: A case study of an open lesson2019In: International Journal of Mathematical Education in Science and Technology, ISSN 0020-739X, E-ISSN 1464-5211Article in journal (Refereed)
  • 339.
    Asami-Johansson, Yukiko
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electrical Engineering, Mathematics and Science, Mathematics.
    Attorps, Iris
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electrical Engineering, Mathematics and Science, Mathematics.
    Japanese and Swedish Mathematics Teacher Educators’ Pedagogical Content Knowledge: An Institutional Perspective2019In: Educaçao Matemática Pesquissa, ISSN 1983-3156, Vol. 21, no 4, p. 157-170Article in journal (Refereed)
    Abstract [en]

    The aim of this paper is to investigate which kind of conditions and constraints affect Japanese and Swedish teacher educators’ pedagogical content knowledge (PCK). We analyse the praxeologies of the lessons in which the educators teach area determination. Our study shows that the Japanese teacher educators’ PCK are more explicitly shared by the community of the teacher educators compared to the Swedish counterpart. Also, the detailed Japanese curriculum and the structured problem solving approach promote to illustrate how to construct rich mathematical and didactical organisations for prospective teachers.

  • 340.
    Asami-Johansson, Yukiko
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences, Mathematics.
    Attorps, Iris
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences, Mathematics.
    Laine, Anu
    University of Helsinki, Helsinki, Finland.
    Comparing the practices of primary school mathematics teacher education Case studies from Japan, Finland and Sweden2017In: PROCEEDINGS OF THE TENTH CONGRESS OF THE EUROPEAN SOCIETY FOR RESEARCH IN MATHEMATICS EDUCATION (CERME10) / [ed] Dooley, T.; Gueudet, G., Dublin, 2017, p. 1602-1609Conference paper (Refereed)
    Abstract [en]

    In this study, we have observed three different teacher educators’ lessons, concerning area determination of polygons in primary school teacher training courses in Japan, Finland and Sweden. The aim of this paper is to investigate the main elements of the lessons and to compare the differences between the countries. We focus on how the teacher educators relate the didactic construction of the lessons for prospective teachers to the school mathematical and didactical organisations by applying Chevallard’s anthropological theory of the didactic (ATD). The analysis shows how the curricula and the different traditions of teaching practice in each country influence the mathematical and didactical construction of the lessons.

  • 341.
    Asami-Johansson, Yukiko
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electrical Engineering, Mathematics and Science, Mathematics. Department of Science Education, University of Copenhagen, Copenhagen, Denmark.
    Attorps, Iris
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electrical Engineering, Mathematics and Science, Mathematics.
    Winsløw, C.
    Department of Science Education, University of Copenhagen, Copenhagen, Denmark.
    Comparing mathematics education lessons for primary school teachers: case studies from Japan, Finland and Sweden2019In: International Journal of Mathematical Education in Science and Technology, ISSN 0020-739X, E-ISSN 1464-5211Article in journal (Refereed)
    Abstract [en]

    The aim of this paper is to investigate and compare lessons given in primary school teacher education in Japan, Finland and Sweden. We analyse one lesson from each country and compare them using a common framework. Chevallard’s anthropological theory of the didactic (ATD) is used to frame this analysis and in particular to model teacher educators' didactic organization of the lessons. The focus is on how the didactic organizations of the teacher educators relate to the mathematical and didactic organizations of primary school. Based on official documents and viewpoints of the teacher educators, we also discuss how the contents and descriptions of the national curricula, and the different traditions of the teaching practices in each country, influence the didactic organizations found in the lessons. 

  • 342.
    Aslan, Pinar
    Umeå universitet, Institutionen för socialt arbete.
    How Do They Make It?: perspectives on labour market participation among descendants of immigrants in Sweden2019Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    This is a compilation dissertation based on a comprehensive summary and four empirical articles. The overarching aim of the dissertation is to study influences on the occupational aspirations and attainments of employed descendants of non-European, non-Western immigrants in Sweden, from their own perspectives. The results are based on qualitative interviews with 9 men and 12 women, all born in Sweden with two immigrant parents. At the time of the interviews, the respondents were aged 25–35 years and had been employed for a minimum of six months, most of them for at least three years.

    Article I analyses and discusses family influences on the occupational aspirations of the descendants of immigrants. It employs a theoretical framework of cultural capital to demonstrate that descendants’ interpretations of their parents’ experiences and living conditions before, during, and after migration shape and positively influence their own occupational aspirations. The article also shows that siblings may function as important transferrers of knowledge and information.

    Article II examines how the descendants of immigrants perceive that interactions with public officials have benefitted their occupational aspirations and attainments. Using the concept of social capital as an analytical tool, the article draws three conclusions. First, public officials who establish a sense of connectedness in interacting with descendants of immigrants may transmit substantial symbolic resources to them. Second, it is important for public officials to support their clients’ personally meaningful goals and to focus on possibilities for achieving those goals. The article also shows that public officials may help descendants of immigrants to form and fulfil occupational aspirations by transmitting important knowledge and information to them.

    Article III explores how descendants of immigrants understand labour market conditions, and how these conditions influence their occupational pathways and strategies. The article employs the concept of habitus to analyse approaches and strategies on the labour market in relation to objective conditions. Three themes are presented in the article. The first theme, being in the “right” field, covers respondents working in branches with labour shortages and/or a high demand for employees with an immigrant background. These respondents used their personal backgrounds as “selling points”, turning the general disadvantage of having an immigrant background into an advantage. The second theme covers respondents who could learn through failing in entering and participating on the labour market, indicating a trial-and-error approach. The third theme deals with respondents who had actively searched for jobs in branches which value their particular skill set. The article highlights the important relationship between active individual agency and external, objective opportunities and constraints.

    Article IV explores perceptions of labour market participation in relation to gender norms and parenting ideals among men and women of migrant descent. Starting from the literature on work, family, and gender in a context of migration, and in relation to the Swedish social and political context, four themes are presented in the results. The male and female respondents viewed labour market participation from different, gendered, perspectives. The women saw labour market participation as a source of emancipation, whereas the men perceived it as a means for providing for a current/future family. Thus, while they depicted themselves as dedicated to norms of gender equality, they also expressed gender- biased views on work and family arrangements. These gender-biased views largely reflect those of Swedish people in general, as demonstrated in earlier studies. Nonetheless, the results reveal that the immigrant heritage of the descendants of immigrants influences their views on labour market participation, perceptions of gender norms, and parenting ideals. The article shows how these descendants interpret and actively challenge gender inequalities in the immigrant generation in ways that support intergenerational changes in work-family arrangements.

  • 343.
    Aslan, Pinar
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Social Work and Criminology, Social Work.
    Ahmadi, Nader
    The Swedish Agency for Work Environment Expertise, Gävle, Sweden.
    Sjöberg, Stefan
    University of Gävle, Faculty of Health and Occupational Studies, Department of Social Work and Criminology, Social Work.
    Wikström, Eva
    Umeå University, Umeå, Sweden.
    What Works? Family Influences on Occupational Aspirations among Descendants of Middle Eastern Immigrants on the Swedish Labour Market2019In: Nordic Journal of Social Research, ISSN 1892-2783, E-ISSN 1892-2783, Vol. 9, p. 134-160Article in journal (Refereed)
    Abstract [en]

    In this article, we examine family influences on occupational aspirations among employed descendants of Middle Eastern immigrants. Using a qualitative approach, we conducted 21 semi-structured interviews with native-born descendants of Middle Eastern immigrants. We present and analyse their interpretations of their parents’ experiences and living conditions before, during and after migration and demonstrate how these interpretations shaped their own occupational aspirations. We discuss parents’ high expectations of their children in relation to ethnic-community valuations of educational and occupational achievements. These high expectations may increase the chances of social mobility but can also become a negative pressure, especially if parents set high standards but cannot help their children to meet those expectations. In these cases, older siblings who possess valuable knowledge of the educational system and labour market can function as important transferrers of resources.

  • 344. Aslan, Pinar
    et al.
    Ahmadi, Nader
    Myndigheten för arbetsmiljökunskap.
    Wikström, Eva
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för socialt arbete.
    Sjöberg, Stefan
    University of Gävle, Faculty of Health and Occupational Studies, Department of Social Work and Criminology, Social Work.
    Choice from Non-Choice? Occupational Pathways and Strategies of Immigrants' Descendants in SwedenManuscript (preprint) (Other academic)
  • 345.
    Aslan, Pinar
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Social Work and Criminology, Social Work.
    Sjöberg, Stefan
    University of Gävle, Faculty of Health and Occupational Studies, Department of Social Work and Criminology, Social Work.
    Wikström, Eva
    Department of Social Work, Umeå University.
    Ahmadi, Nader
    Myndigheten för arbetsmiljökunskap.
    Door Openers? Public Officials as Supportive Actors in the Labour Market Participation of Descendants of Immigrants in Sweden2019In: Nordic Social Work Research, ISSN 2156-857X, E-ISSN 2156-8588Article in journal (Refereed)
    Abstract [en]

    The aim of this study was to examine how employed descendants of immigrants in Sweden perceive that interactions with public officials have benefitted their occupational aspirations and attainments. We conducted qualitative semi-structured interviews with twelve female and nine male descendants of immigrants, followed by an abductive thematic analysis. Applying a theoretical framework of social capital, we found three main influences of public officials from respondents’ perspectives: 1) connectedness, 2) supporting personal goals and focusing on possibilities, and 3) mediation of knowledge and information. We discuss and analyse the symbolic resources deriving from these influences, e.g. increased motivation and self-belief, and conceptualize these resources as social capital contributing to the occupational aspirations and attainments of immigrants’ descendants.

  • 346.
    Aslan, Pinar
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Social Work and Criminology, Social Work.
    Wikström, Eva
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för socialt arbete.
    Ahmadi, Nader
    Myndigheten för arbetsmiljökunskap.
    Sjöberg, Stefan
    University of Gävle, Faculty of Health and Occupational Studies, Department of Social Work and Criminology, Social Work.
    'Kids' in between? Views on work, gender, and family arrangements among men and women of migrant descent in Sweden2020In: Community, Work and Family, ISSN 1366-8803, E-ISSN 1469-3615Article in journal (Refereed)
  • 347.
    Aslani, Mohammad
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Mesgari, Mohammad Saadi
    Division of Visual Information and Interaction, Department of Information Technology, Uppsala University, Uppsala, Sweden.
    Seipel, Stefan
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science. Faculty of Geodesy and Geomatics Engineering, K.N. Toosi University of Technology, Tehran, Iran.
    Wiering, Marco
    Institute of Artificial Intelligence and Cognitive Engineering, University of Groningen, Groningen, Netherlands.
    Developing adaptive traffic signal control by actor-critic and direct exploration methods2018In: Proceedings of the Institution of Civil Engineers: Transport, ISSN 0965-092X, E-ISSN 1751-7710, Vol. 172, no 5, p. 289-298Article in journal (Refereed)
    Abstract [en]

    Designing efficient traffic signal controllers has always been an important concern in traffic engineering. This is owing to the complex and uncertain nature of traffic environments. Within such a context, reinforcement learning has been one of the most successful methods owing to its adaptability and its online learning ability. Reinforcement learning provides traffic signals with the ability automatically to determine the ideal behaviour for achieving their objective (alleviating traffic congestion). In fact, traffic signals based on reinforcement learning are able to learn and react flexibly to different traffic situations without the need of a predefined model of the environment. In this research, the actor-critic method is used for adaptive traffic signal control (ATSC-AC). Actor-critic has the advantages of both actor-only and critic-only methods. One of the most important issues in reinforcement learning is the trade-off between exploration of the traffic environment and exploitation of the knowledge already obtained. In order to tackle this challenge, two direct exploration methods are adapted to traffic signal control and compared with two indirect exploration methods. The results reveal that ATSC-ACs based on direct exploration methods have the best performance and they consistently outperform a fixed-time controller, reducing average travel time by 21%.

  • 348.
    Aslani, Mohammad
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Seipel, Stefan
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science. Faculty of Geodesy and Geomatics Engineering, K.N. Toosi University of Technology, Tehran, Iran.
    Mohammad Saadi, Mesgari
    Division of Visual Information and Interaction, Department of Information Technology, Uppsala University, Uppsala, Sweden.
    Wiering, Marco A.
    Institute of Artificial Intelligence and Cognitive Engineering, University of Groningen, Groningen, Netherlands.
    Traffic signal optimization through discrete and continuous reinforcement learning with robustness analysis in downtown Tehran2018In: Advanced Engineering Informatics, ISSN 1474-0346, E-ISSN 1873-5320, Vol. 38, p. 639-655Article in journal (Refereed)
    Abstract [en]

    Traffic signal control plays a pivotal role in reducing traffic congestion. Traffic signals cannot be adequately controlled with conventional methods due to the high variations and complexity in traffic environments. In recent years, reinforcement learning (RL) has shown great potential for traffic signal control because of its high adaptability, flexibility, and scalability. However, designing RL-embedded traffic signal controllers (RLTSCs) for traffic systems with a high degree of realism is faced with several challenges, among others system disturbances and large state-action spaces are considered in this research.

    The contribution of the present work is founded on three features: (a) evaluating the robustness of different RLTSCs against system disturbances including incidents, jaywalking, and sensor noise, (b) handling a high-dimensional state-action space by both employing different continuous state RL algorithms and reducing the state-action space in order to improve the performance and learning speed of the system, and (c) presenting a detailed empirical study of traffic signals control of downtown Tehran through seven RL algorithms: discrete state Q-learning(&#x3BB;" role="presentation">), SARSA(&#x3BB;" role="presentation">), actor-critic(&#x3BB;" role="presentation">), continuous state Q-learning(&#x3BB;" role="presentation">), SARSA(&#x3BB;" role="presentation">), actor-critic(&#x3BB;" role="presentation">), and residual actor-critic(&#x3BB;" role="presentation">).

    In this research, first a real-world microscopic traffic simulation of downtown Tehran is carried out, then four experiments are performed in order to find the best RLTSC with convincing robustness and strong performance. The results reveal that the RLTSC based on continuous state actor-critic(&#x3BB;" role="presentation">) has the best performance. In addition, it is found that the best RLTSC leads to saving average travel time by 22% (at the presence of high system disturbances) when it is compared with an optimized fixed-time controller.

  • 349.
    Aslani, Mohammad
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Seipel, Stefan
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science. Division of Visual Information and Interaction, Department of Information Technology, Uppsala University, Uppsala, Sweden.
    Wiering, Marco
    Institute of Artificial Intelligence and Cognitive Engineering, University of Groningen, Groningen, the Netherlands.
    Continuous residual reinforcement learning for traffic signal control optimization2018In: Canadian journal of civil engineering (Print), ISSN 0315-1468, E-ISSN 1208-6029, Vol. 45, no 8, p. 690-702Article in journal (Refereed)
    Abstract [en]

    Traffic signal control can be naturally regarded as a reinforcement learning problem. Unfortunately, it is one of the most difficult classes of reinforcement learning problems owing to its large state space. A straightforward approach to address this challenge is to control traffic signals based on continuous reinforcement learning. Although they have been successful in traffic signal control, they may become unstable and fail to converge to near-optimal solutions. We develop adaptive traffic signal controllers based on continuous residual reinforcement learning (CRL-TSC) that is more stable. The effect of three feature functions is empirically investigated in a microscopic traffic simulation. Furthermore, the effects of departing streets, more actions, and the use of the spatial distribution of the vehicles on the performance of CRL-TSCs are assessed. The results show that the best setup of the CRL-TSC leads to saving average travel time by 15% in comparison to an optimized fixed-time controller.

  • 350.
    Aspfors, Jessica
    et al.
    University of Nordland, Bodø, Norway.
    Fransson, Göran
    University of Gävle, Faculty of Education and Business Studies, Department of Educational sciences, Curriculum studies.
    A metasynthesis of research on mentor education: three emerging dimensions2015Conference paper (Refereed)
    Abstract [en]

    The aim of this meta-synthesis is to deepen the understanding and knowledge of research focusing on education for mentors of newly qualified teachers (NQTs). Altogether, 10 studies met the criteria for full inclusion and were synthesised. Three overarching dimensions were found as a final synthesis guiding the further development of mentor education: 1) Contextual dimensions, 2) Theoretical-analytical dimensions, and 3) Relational dimensions. The synthesis stresses the importance of a systematic, long-term and research-based mentor education that develops mentors’ (self-)understanding of teaching and mentoring, i.e. is well integrated in the educational context, has a balance of theoretical and practical components, includes rich possibilities for interaction and reflection and prepares for an evidence-informed mentoring.

    A REVISED AND EXTENDED VERSION OF THIS PAPER HAS LATER BEEN PUBLISHED AS OPEN ACCESS, SEE:  http://www.sciencedirect.com/science/article/pii/S0742051X1500030X

     

45678910 301 - 350 of 9456
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard-cite-them-right
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • sv-SE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • de-DE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf