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  • Hüllmann, Dino
    et al.
    Bundesanstalt für Materialforschung und -prüfung (BAM) Berlin, Germany.
    Neumann, Patrick
    Bundesanstalt für Materialforschung und -prüfung (BAM) Berlin, Germany.
    Scheuschner, Nils
    Bundesanstalt für Materialforschung und -prüfung (BAM) Berlin, Germany.
    Bartholmai, Matthias
    Bundesanstalt für Materialforschung und -prüfung (BAM) Berlin, Germany.
    Lilienthal, Achim J.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Experimental Validation of the Cone-Shaped Remote Gas Sensor Model2019Ingår i: 2019 IEEE SENSORS, 2019Konferensbidrag (Refereegranskat)
    Abstract [en]

    Remote gas sensors mounted on mobile robotsenable the mapping of gas distributions in large or hardlyaccessible areas. A challenging task, however, is the generation ofthree-dimensional distribution maps from the gas measurements.Suitable reconstruction algorithms can be adapted, for instance,from the field of computed tomography (CT), but both theirperformance and strategies for selecting optimal measuring posesmust be evaluated. For this purpose simulations are used, since, incontrast to field tests, they allow repeatable conditions. Althoughseveral simulation tools exist, they lack realistic models of remotegas sensors. Recently, we introduced a model for a Tunable DiodeLaser Absorption Spectroscopy (TDLAS) gas sensor taking intoaccount the conical shape of its laser beam. However, the novelmodel has not yet been validated with experiments. In this paperwe compare our model with a real sensor device and show thatthe assumptions made hold.

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    Experimental Validation of the Cone-Shaped Remote Gas Sensor Model
  • Palm, Rainer
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Lilienthal, Achim J.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Uncertainty and Fuzzy Modeling in Human-Robot Navigation2019Ingår i: Proceedings of the 11th International Joint Conference on Computational Intelligence: Volume 1 (FCTA), SciTePress, 2019, s. 296-305Konferensbidrag (Refereegranskat)
    Abstract [en]

    The interaction between humans and mobile robots in shared areas requires a high level of safety especially at the crossings of the trajectories of humans and robots. We discuss the intersection calculation and its fuzzy version in the context of human-robot navigation with respect to noise information. Based on known parameters of the Gaussian input distributions at the orientations of human and robot the parameters of the output distributions at the intersection are to be found by analytical and fuzzy calculation. Furthermore the inverse task is discussed where the parameters of the output distributions are given and the parameters of the input distributions are searched. For larger standard deviations of the orientation signals we suggest mixed Gaussian models as approximation of nonlinear distributions.

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    Uncertainty and Fuzzy Modelingin Human-robot Navigation
  • Vintr, Tomas
    et al.
    Artificial Intelligence Center, Czech Technical University.
    Molina, Sergi
    Lincoln Centre for Autonomous Systems (L-CAS), University of Lincoln.
    Senanayake, Ransalu
    Stanford University.
    Broughton, George
    Artificial Intelligence Center, Czech Technical University.
    Yan, Zhi
    Distributed Artificial Intelligence and Knowledge Laboratory (CIAD), University of Technology of Belfort-Montbeliard (UTBM), France.
    Ulrich, Jiri
    Artificial Intelligence Center, Czech Technical University.
    Kucner, Tomasz P.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Swaminathan, Chittaranjan Srinivas
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Majer, Filip
    Artificial Intelligence Center, Czech Technical University.
    Stachova, Maria
    University of Matej Bel, Banska Bystrica, Slovakia.
    Lilienthal, Achim J.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Krajnik, Tomas
    Artificial Intelligence Center, Czech Technical University.
    Time-varying Pedestrian Flow Models for Service Robots2019Ingår i: 2019 European Conference on Mobile Robots (ECMR), IEEE, 2019, artikel-id 8870909Konferensbidrag (Refereegranskat)
    Abstract [en]

    We present a human-centric spatio-temporal model for service robots operating in densely populated environments for long time periods. The method integrates observations of pedestrians performed by a mobile robot at different locations and times into a memory efficient model, that represents the spatial layout of natural pedestrian flows and how they change over time. To represent temporal variations of the observed flows, our method does not model the time in a linear fashion, but by several dimensions wrapped into themselves. This representation of time can capture long-term (i.e. days to weeks) periodic patterns of peoples’ routines and habits. Knowledge of these patterns allows making long-term predictions of future human presence and walking directions, which can support mobile robot navigation in human-populated environments. Using datasets gathered by a robot for several weeks, we compare the model to state-of-the-art methods for pedestrian flow modelling.

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    Time-varying Pedestrian Flow Models for Service Robots
  • Adolfsson, Daniel
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Lowry, Stephanie
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Magnusson, Martin
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Lilienthal, Achim J.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Andreasson, Henrik
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    A Submap per Perspective: Selecting Subsets for SuPer Mapping that Afford Superior Localization Quality2019Ingår i: 2019 European Conference on Mobile Robots (ECMR), IEEE, 2019Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper targets high-precision robot localization. We address a general problem for voxel-based map representations that the expressiveness of the map is fundamentally limited by the resolution since integration of measurements taken from different perspectives introduces imprecisions, and thus reduces localization accuracy.We propose SuPer maps that contain one Submap per Perspective representing a particular view of the environment. For localization, a robot then selects the submap that best explains the environment from its perspective. We propose SuPer mapping as an offline refinement step between initial SLAM and deploying autonomous robots for navigation. We evaluate the proposed method on simulated and real-world data that represent an important use case of an industrial scenario with high accuracy requirements in an repetitive environment. Our results demonstrate a significantly improved localization accuracy, up to 46% better compared to localization in global maps, and up to 25% better compared to alternative submapping approaches.

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    A Submap per Perspective - Selecting Subsets for SuPer Mapping that Afford Superior Localization Quality
  • Lilienthal, Achim J.
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Schindler, Maike
    Örebro universitet, Institutionen för naturvetenskap och teknik. Department of Special Education, University of Cologne, Germany.
    Current Trends in Eye Tracking Research in Mathematics Education: A PME Literature Review: A PME Survey2019Ingår i: 43rd Annual Meeting of the International Group for the Psychology of Mathematics Education, 2019, Vol. 4, s. 62-62Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Eye tracking (ET) is a research method that receives growing interest in mathematics education research (MER). This paper aims to give a literature overview, specifically focusing on the evolution of interest in this technology, ET equipment, and analysis methods used in mathematics education. To capture the current state, we focus on papers published in the proceedings of PME, one of the primary conferences dedicated to MER, of the last ten years. We identify trends in interest, methodology, and methods of analysis that are used in the community, and discuss possible future developments.

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    Lilienthal and Schindler (PME 2019) Current Trends in Eye Tracking in MER
  • Palm, Rainer
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Lilienthal, Achim J.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Gaussian Noise and the Intersection Problem in Human-Robot Systems: Analytical and Fuzzy Approach2019Ingår i: 2019 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE), IEEE, 2019, s. 1-6, artikel-id 8858796Konferensbidrag (Refereegranskat)
    Abstract [en]

    In this paper the intersection problem in humanrobot systems with respect to noisy information is discussed. The interaction between humans and mobile robots in shared areas requires a high level of safety especially at the intersections of trajectories. We discuss the intersection problem with respect to noisy information on the basis of an analytic geometrical model and its TS fuzzy version. The transmission of a 2-dimensional Gaussian noise signal, in particular information on human and robot orientations, through a non-linear static system and its fuzzy version, will be described. We discuss the problem: Given the parameters of the input distributions, find the parameters of the output distributions.

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    Gaussian noise and the intersection problem in Human-Robot Systems: Analytical and fuzzy approach
  • Chadalavada, Ravi Teja
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Andreasson, Henrik
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Schindler, Maike
    Faculty of Human Sciences, University of Cologne, Germany, Cologne, Gemany.
    Lilienthal, Achim J.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Implicit intention transference using eye-tracking glasses for improved safety in human-robot interaction2019Konferensbidrag (Refereegranskat)
    Abstract [en]

    Eye gaze can convey information about intentions beyond what can beinferred from the trajectory and head pose of a person. We propose eye-trackingglasses as safety equipment in industrial environments shared by humans androbots. In this work, an implicit intention transference system was developed and implemented. Robot was given access to human eye gaze data, and it responds tothe eye gaze data through spatial augmented reality projections on the sharedfloor space in real-time and the robot could also adapt its path. This allows proactivesafety approaches in HRI for example by attempting to get the human'sattention when they are in the vicinity of a moving robot. A study was conductedwith workers at an industrial warehouse. The time taken to understand the behaviorof the system was recorded. Electrodermal activity and pupil diameter wererecorded to measure the increase in stress and cognitive load while interactingwith an autonomous system, using these measurements as a proxy to quantifytrust in autonomous systems.

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    Implicit intention transference using eye-tracking glasses for improved safety in human-robot interaction
  • Sundberg, Bodil
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Areljung, Sofie
    Department of Applied Educational Science, Umeå University, Umeå, Sweden .
    Ottander, Christina
    Department of Science and Mathematics Education, Umeå University, Sweden .
    Opportunities for Education for Sustainability through multidimensional preschool science2019Ingår i: NorDiNa: Nordic Studies in Science Education, ISSN 1504-4556, E-ISSN 1894-1257, Vol. 3, nr 15, s. 358-369Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this article, we exemplify and discuss how preschool science education may contribute to Education forSustainability (EfS). We draw on data from science activities in fourteen Swedish preschools, in which wehave previously identified examples of ‘multidimensional science teaching’, hence, teaching that intertwineschildren’s science learning with multiple dimensions of children’s lives, such as emotions, fantasy,play and aesthetic modes of expressions. By re-analysing these activities through an EfS lense, we showseveral examples of how multidimensional science teaching provide opportunities for children to developagency and empowerment as well as connectedness with the environment, and some examples of creativeproblem solving. Yet, we advocate that teachers’ active participation is crucial for realising multidimensionalscience teaching in a way that contributes to EfS.

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    Opportunities for Education for Sustainability through multidimensional preschool science
  • Hearn, Jeff
    et al.
    Örebro universitet, Institutionen för humaniora, utbildnings- och samhällsvetenskap.
    Hobson, Barbara
    Stockholm University, Stockholm, Sweden.
    Gender, state and citizenships: Challenges and dilemmas in feminist theorizing2020Ingår i: The New Handbook of Political Sociology / [ed] T. Janoski, C. de Leon, J. Misra and I. Martin, Cambridge: Cambridge University Press, 2020, 1, s. 153-190Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [sv]

    The concept of citizenships, in the plural, reflects different research traditions in citizenship theorizing: citizenship as legal status in a sovereign state, as a bearer of rights and obligations; citizenship as participation (civic republicanism); and citizenship as social membership. Each of these enhance the capabilities of individuals to become participants in political, economic and social spheres of life. Citizenships as a concept also embraces practices: how these aspects of citizenship are experienced in everyday encounters and the relationships of power:  in families, workplaces, welfare offices, social movements and their variations in institutional contexts.

    We focus on how gender has become more salient in theorizing across these citizenship domains, extending the boundaries of social membership and inclusion (Lister 2003; Hobson and Lister 2002). Implicit in the pluralizing of citizenships is the recognition of the need for a dynamic concept that engages with multi-dimensional aspects of gender, citizenships and social memberships within, below and beyond the state. This approach allows us to capture both the diversity in locations and situations of individuals and groups and the multi-scalar structures of governance: by national and transnational institutions and actors, as well as the opportunities and constraints for social movements to transform them. Finally, this chapter engages with the theoretical terrain on intersectionalities, viewing gender through the lens of complex inequalities across age, citizenship/migrant status, class, ethnicity/race, region, and their intersections. Throughout we engage with the dilemmas and challenges in theorizing gender, citizenships and social memberships: if and how gender matters in the framing of citizenship and what processes shape social divisions and citizenship identities.  

    This chapter comprises two main sections and a concluding discussion. The first focuses on feminist theorizing within two main research traditions in citizenship theorizing: first, social membership: T.H. Marshall’s framework, its legacy in welfare regime paradigm, and the dialogues on gender, states and citizenship that arose from them; second, civic republicanism and participatory citizenship, addressing agency (citizenship in practice), frames of gendered citizenship. In the second section, we focus on the changing landscape of feminist theorizing on citizenships emerging from critical analysis of men and masculinities, postcolonial critical race theory, intersectionality, migration and transnationalism. We conclude with Challenges, Dilemmas and Debates, addressing the implications of these complexities and dilemmas and challenges in gendered citizenships, in particular, the fragmentation in solidarities reflected in the widening gap in capabilities and inequalities and polarization across citizenship identities expressed in new forms of nationhood, nationalism and populism.  

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    Gender, state and citizenships: Challenges and dilemmas in feminist theorizing_Part1
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    Gender, state and citizenships: Challenges and dilemmas in feminist theorizing_Part2
  • Kristoffersson, Eleonor
    et al.
    Örebro universitet, Institutionen för juridik, psykologi och socialt arbete.
    Larsson, Ylva
    Örebro universitet, Institutionen för juridik, psykologi och socialt arbete.
    The Role of Whistleblowers at the Swedish Tax Agency: The role of Whistleblowers at the Swedish Tax Agency2019Ingår i: The Role of Whistleblowers at the Swedish Tax Agency, 2019Konferensbidrag (Övrigt vetenskapligt)
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    The Role of Whistleblowers at the Swedish Tax Agency
  • Schindler, Maike
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik. University of Cologne, Cologne, Germany.
    Schaffernicht, Erik
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Lilienthal, Achim J.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Differences in Quantity Recognition Between Students with and without Mathematical Difficulties Analyzed Through Eye: Analysis Through Eye-Tracking and AI2019Ingår i: Proceedings of the 43rd Conference of the International Group for the Psychology of Mathematics Education / [ed] M. Graven, H. Venkat, A. Essien & P. Vale, PME , 2019, Vol. 3, s. 281-288Konferensbidrag (Refereegranskat)
    Abstract [en]

    Difficulties in mathematics learning are an important topic in practice and research. In particular, researchers and practitioners need to identify students’ needs for support to teach and help them adequately. However, empirical research about group differences of students with and without mathematical difficulties (MD) is still scarce. Previous research suggests that students with MD may differ in their quantity recognition strategies in structured whole number representations from students without MD. This study uses eye-tracking (ET), combined with Artificial Intelligence (AI), in particular pattern recognition methods, to analyze group differences in gaze patterns in quantity recognition of N=164 fifth grade students.

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    Differences in Quantity Recognition Between Students with and without Mathematical Difficulties Analyzed Through Eye
  • Larsson, Ylva
    Örebro universitet, Institutionen för juridik, psykologi och socialt arbete.
    Visselblåsare och skatt2019Ingår i: Svensk Skattetidning, ISSN 0346-2218, Vol. 8, s. 493-500Artikel i tidskrift (Övrigt vetenskapligt)
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    Visselblåsare och skatt
  • Lagriffoul, Fabien
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Alirezaie, Marjan
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Perceiving and acting out of the box2019Ingår i: Proceedings of the 7th International Workshop on Artificial Intelligence and Cognition / [ed] Angelo Cangelosi, Antonio Lieto, CEUR-WS , 2019, Vol. 2483Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper discusses potential limitations in learning in au-tonomous robotic systems that integrate several specialized subsystemsworking at different levels of abstraction. If the designers have antici-pated what the system may have to learn, then adding new knowledgeboils down to adding new entries in a database and/or tuning parametersof some subsystem(s). But if this new knowledge does not fit in prede-fined structures, the system can simply not acquire it, hence it cannot“think out of the box” designed by its creators. We show why learningout of the box may be difficult in integrated systems, hint at some exist-ing potential approaches, and finally suggest that a better approach maycome by looking at constructivist epistemology, with focus on Piaget’sschemas theory.

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    Perceiving and Acting Out of the Box
  • Lowry, Stephanie
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Similarity criteria: evaluating perceptual change for visual localization2019Ingår i: 2019 European Conference on Mobile Robots (ECMR), IEEE, 2019, artikel-id 8870962Konferensbidrag (Refereegranskat)
    Abstract [en]

    Visual localization systems may operate in environments that exhibit considerable perceptual change. This paper proposes a method of evaluating the degree of appearance change using a similarity criteria based on comparing the subspaces spanned by the principal components of the observed image descriptors. We propose two criteria - θmin measures the minimum angle between subspaces and Stotal measures the total similarity between the subspaces. These criteria are introspective - they evaluate the performance of the image descriptor using nothing more than the image descriptor itself. Furthermore, we demonstrate that these similarity criteria reflect the ability of the image descriptor to perform visual localization successfully, thus allowing a measure of quality control on the localization output.

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    Similarity criteria: Evaluating perceptual change for visual localization
  • Strand, Susanne
    et al.
    Örebro universitet, Institutionen för juridik, psykologi och socialt arbete.
    Petersson, Joakim
    Örebro universitet, Institutionen för juridik, psykologi och socialt arbete.
    Risk management of Domestic Violence2019Ingår i: The EU Mutual Learning Programme in Gender Equality: Preventing domestic violence with Men and Boys: Challenges and Opportunities, European Commission, 2019Konferensbidrag (Refereegranskat)
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    Risk Management of Domestic Violence
  • Hearn, Jeff
    Örebro universitet, Institutionen för humaniora, utbildnings- och samhällsvetenskap. University of Huddersfield, UK; Hanken School of Economics, Finland; University of South Africa, South Africa.
    Young Working-Class Men in Transition 2019Ingår i: Sociology, ISSN 0038-0385, Vol. 54, nr 1, s. 202-204Artikel, recension (Refereegranskat)
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    Steven Roberts Young Working-Class Men in Transition
  • Hearn, Jeff
    et al.
    Örebro universitet, Institutionen för humaniora, utbildnings- och samhällsvetenskap. Hanken School of Economics, Finland .
    Thym, Anika
    University of Basel, Switzerland; Örebro University, Sweden .
    Masculinities under Neoliberalism (A. Cornwall, F. G. Karioris and N. Lindisfarne, eds.)2019Ingår i: Gender and Development, ISSN 1355-2074, E-ISSN 1364-9221, Vol. 27, nr 2, s. 407-409Artikel, recension (Refereegranskat)
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    Masculinities under Neoliberalism (A. Cornwall, F. G. Karioris and N. Lindisfarne, eds.)
  • Hearn, Jeff
    et al.
    Örebro universitet, Institutionen för humaniora, utbildnings- och samhällsvetenskap. Hanken School of Economics, Helsinki, Finland; University of Huddersfield, UK.
    Howson, Richard
    University of Wollongong, Australia.
    The institutionalization of (Critical) Studies on Men and Masculinities: Geopolitical perspectives2019Ingår i: Routledge International Handbook of Masculinity Studies / [ed] Lucas Gottzén, Ulf Mellström and Tamara Shefer, London: Routledge, 2019, 1, s. 19-30Kapitel i bok, del av antologi (Refereegranskat)
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    The institutionalization of (Critical) Studies on Men and Masculinities: Geopolitical perspectives
  • Hearn, Jeff
    et al.
    Örebro universitet, Institutionen för humaniora, utbildnings- och samhällsvetenskap.
    Vasquez del Aquila, Ernesto
    University College Dublin, Ireland.
    Hughson, Marina
    Institute of Criminology, Serbia.
    Unsustainable institutions of men: transnational dispersed centres and immanent contradictions2019Ingår i: Unsustainable Institutions of Men: Transnational Dispersed Centres, Gender Power, Contradictions / [ed] Jeff Hearn, Ernesto Vasquez del Aquila, Marina Hughson, London: Routledge, 2019, 1, s. 1-21Kapitel i bok, del av antologi (Refereegranskat)
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    Introduction: unsustainable institutions of men: Transnational dispersed centres and immanent contradictions
  • Hearn, Jeff
    et al.
    Örebro universitet, Institutionen för humaniora, utbildnings- och samhällsvetenskap. University of Huddersfield, Huddersfield, UK; Hanken School of Economics, Helsinki, Finland.
    Hall, Matthew
    Arden University, Coventry, UK.
    New technologies, image distribution and cyberabuse2019Ingår i: NOTA News, nr 88, s. 10-13Artikel i tidskrift (Övrigt vetenskapligt)
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    New Technologies, Image Distribution and Cyberabuse – Jeff Hearn and Matthew Hall
  • Arad, Boaz
    et al.
    Department of Computer Science, Ben‐Gurion University of the Negev, Beer‐Sheva, Israel .
    Balendonck, Jos
    Greenhouse Horticulture, Wageningen University & Research, Wageningen, The Netherlands.
    Barth, Ruud
    Greenhouse Horticulture, Wageningen University & Research, Wageningen, The Netherlands.
    Ben-Shahar, Ohad
    Department of Computer Science, Ben‐Gurion University of the Negev, Beer‐Sheva, Israel .
    Edan, Yael
    Department of Industrial Engineering and Management, Ben‐Gurion University of the Negev, Beer‐Sheva, Israel .
    Hellström, Thomas
    Department of Computing Science, Umeå University, Umeå, Sweden.
    Hemming, Jochen
    Greenhouse Horticulture, Wageningen University & Research, Wageningen, The Netherlands.
    Kurtser, Polina
    Department of Industrial Engineering and Management, Ben‐Gurion University of the Negev, Beer‐Sheva, Israel .
    Ringdahl, Ola
    Department of Computing Science, Umeå University, Umeå, Sweden.
    Tielen, Toon
    Greenhouse Horticulture, Wageningen University & Research, Wageningen, The Netherlands.
    van Tuijl, Bart
    Greenhouse Horticulture, Wageningen University & Research, Wageningen, The Netherlands.
    Development of a sweet pepper harvesting robot2020Ingår i: Journal of Field Robotics, ISSN 1556-4959, E-ISSN 1556-4967Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper presents the development, testing and validation of SWEEPER, a robot for harvesting sweet pepper fruit in greenhouses. The robotic system includes a six degrees of freedom industrial arm equipped with a specially designed end effector, RGB-D camera, high-end computer with graphics processing unit, programmable logic controllers, other electronic equipment, and a small container to store harvested fruit. All is mounted on a cart that autonomously drives on pipe rails and concrete floor in the end-user environment. The overall operation of the harvesting robot is described along with details of the algorithms for fruit detection and localization, grasp pose estimation, and motion control. The main contributions of this paper are the integrated system design and its validation and extensive field testing in a commercial greenhouse for different varieties and growing conditions. A total of 262 fruits were involved in a 4-week long testing period. The average cycle time to harvest a fruit was 24 s. Logistics took approximately 50% of this time (7.8 s for discharge of fruit and 4.7 s for platform movements). Laboratory experiments have proven that the cycle time can be reduced to 15 s by running the robot manipulator at a higher speed. The harvest success rates were 61% for the best fit crop conditions and 18% in current crop conditions. This reveals the importance of finding the best fit crop conditions and crop varieties for successful robotic harvesting. The SWEEPER robot is the first sweet pepper harvesting robot to demonstrate this kind of performance in a commercial greenhouse.

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    Development ofasweetpepper harvesting robot
  • Kurtser, Polina
    et al.
    Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer Sheva, Israel.
    Arad, Boaz
    Department of Computer Science, Ben-Gurion University of the Negev, Beer Sheva, Israel .
    Ben-Shahar, Ohad
    Department of Computer Science, Ben-Gurion University of the Negev, Beer Sheva, Israel .
    van Bree, Milan
    Irmato Industrial Solutions Veghel B.V., Veghel, The Netherlands .
    Moonen, Joep
    Irmato Industrial Solutions Veghel B.V., Veghel, The Netherlands .
    van Tujil, Bart
    Greenhouse Horticulture, Wageningen University and Research Centre, Wageningen, the Netherlands.
    Edan, Yael
    Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer Sheva, Israel .
    Robotic data acquisition of sweet pepper images for research and development2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    A main problem limiting the development of robotic harvesters is robust fruit detection [5]. Despite intensive research conducted in identifying the fruits and their location [2,3], current fruit detection algorithms have a limited detection rate of 0.87 which is unfeasible from an economic perspective [5]. The complexity of the fruit detection task is due to the unstructured and dynamic nature of both the objects and the environment [4-6]: the fruit have inherent high variability in size, shape, texture, and location; occlusion and variable illumination conditions significantly influence the detection performance[3].

    A common practice for image processing R&D for complicated problems is the acquisition of a large database (e.g., Labelme open source labeling database [1], Oxford building dataset [2]). These datasets enable to advance vision algorithms development [7] and provide a benchmark for evaluating new algorithms. To the best of our knowledge, to date there is no open dataset available for R&D in image processing of agricultural objects. Evaluation of previously reported algorithms was based on limited data [5]. Previous research indicated the importance of evaluating algorithms for a wide range of sensory, crop, and environmental conditions [5].

    A robotic acquisition system and procedure was developed using a 6 degree of freedom manipulator, equipped with 3 different sensors to automatically acquire images from several viewpoints with different sensors and illumination conditions. Measurements were conducted along the day and at night in a commercial greenhouse and resulted in a total of 1764 images from 14 viewpoints for each scene. Additionally, drawbacks and advantages of the proposed approach as compared to other approaches previously utilized will be discussed along with recommendations for future acquisitions.

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    Robotic Data Acquisition of Sweet Pepper Images for Research and Development
  • Hedbrant, Alexander
    et al.
    Örebro universitet, Institutionen för medicinska vetenskaper.
    Andersson, Lena
    Region Örebro län. Örebro universitet, Institutionen för medicinska vetenskaper. Department of Occupational and Environmental Medicine.
    Bryngelsson, Ing-Liss
    Department of Occupational and Environmental Medicine, Örebro University Hospital, Örebro, Sweden.
    Eklund, Daniel
    Örebro universitet, Institutionen för medicinska vetenskaper.
    Westberg, Håkan
    Department of Medical Sciences, School of Medicine and Health, Örebro University, Örebro, Sweden; Inflammatory Response and Infection Susceptibility Centre (iRiSC), Örebro University, Örebro, Sweden; Department of Occupational and Environmental Medicine, Örebro University Hospital, Örebro, Sweden.
    Särndahl, Eva
    Örebro universitet, Institutionen för medicinska vetenskaper.
    Persson, Alexander
    Örebro universitet, Institutionen för medicinska vetenskaper.
    Quartz Dust Exposure Affects NLRP3 Inflammasome Activation and Plasma Levels of IL-18 and IL-1Ra in Iron Foundry Workers2020Ingår i: Mediators of Inflammation, ISSN 0962-9351, E-ISSN 1466-1861, artikel-id 8490908Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Purpose: To study the association between inhalation of particulate matter or quartz in Swedish iron foundries and the effects on NLRP3 inflammasome activation. 

    Methods: Particle exposure measurements were performed during an eight-hour work day for 85 foundry workers at three Swedish iron foundries. Personal sampling was used for measurement of respirable quartz and dust and stationary measurements to obtain exposure measurements for inhalable dust and PM10. The NLRP3 inflammasome markers, interleukin- (IL-) 1β and IL-18, and inhibitors IL-1 receptor antagonist (IL-1Ra) and IL-18 binding protein (IL-18BP) were measured in plasma. Inflammasome activation was measured by caspase-1 enzymatic activity in monocytes in whole blood by flow cytometry, and expression of inflammasome-related genes was quantified using real-time PCR. Multiple linear regression analysis was used to investigate associations between PM exposures and inflammatory markers. Sex, age, smoking, current infection, BMI, and single nucleotide polymorphism in the inflammasome regulating genes CARD8 (C10X) and NLRP3 (Q705K) were included as covariates. 

    Results: The average exposure levels of respirable dust and quartz were 0.85 and 0.052 mg/m3, respectively. A significant exposure-response was found for respirable dust and IL-18 and for inhalable dust and IL-1Ra. Whole blood, drawn from study participants, was stimulated ex vivo with inflammasome priming stimuli LPS or Pam3CSK4, resulting in a 47% and 49% increase in caspase-1 enzymatic activity in monocytes. This increase in caspase-1 activity was significantly attenuated in the higher exposure groups for most PM exposure measures. 

    Conclusions: The results indicate that exposure levels of PM in the iron foundry environment can affect the NLRP3 inflammasome and systemic inflammation.

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    Quartz Dust Exposure Affects NLRP3 Inflammasome Activation and Plasma Levels of IL-18 and IL-1Ra in Iron Foundry Workers
  • Ringdahl, Ola
    et al.
    Department of Computing Science, Umeå University, Umeå, Sweden .
    Kurtser, Polina
    Örebro universitet, Institutionen för naturvetenskap och teknik. Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer Sheva, Israel.
    Barth, Ruud
    Greenhouse Horticulture, Wageningen University and Research Centre, Wageningen, the Netherlands.
    Edan, Yael
    Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer Sheva, Israel .
    Operational flow of an autonomous sweetpepper harvesting robot2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    Advanced automation is required for greenhouse production systems due to the lack of skilled workforce and increasing labour costs [1]. As part of the EU project SWEEPER, we are working on developing an autonomous robot able to harvest sweet pepper fruits in greenhouses. This paper focuses on the operational flow of the robot for the high level task planning.

    In the SWEEPER project, an RGB camera is mounted on the end effector to detect fruits. Due to the dense plant rows, the camera is located at a maximum of 40 cm from the plants and hence cannot provide an overview of all fruit locations. Only a few ripe fruits at each acquisition can be seen. This implies that the robot must incorporate a search pattern to look for fruits. When at least one fruit has been detected in the image, the search is aborted and a harvesting phase is initiated. The phase starts with directing the manipulator to a point close to the fruit and then activating a visual servo control loop. This motion approach ensures that the fruit is grasped despite the occlusions caused by the stems and leaves. When the manipulator has reached the fruit, it is harvested and automatically released into a container. If there are more fruits that have already been detected, the system continues to pick them. When all detected fruits have been harvested, the system resumes the search pattern again. When the search pattern is finished and no more fruits are detected, the robot base is advanced along the row to the next plant and repeats the operations above.

    To support implementation of the workflow into a program controlling the actual robot, a generic software framework for development of agricultural and forestry robots was used [2]. The framework is constructed with a hybrid robot architecture, using a state machine implementing the following flowchart.

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    Operational flow of an autonomous sweet pepper harvesting robot
  • Ringdahl, Ola
    et al.
    Department of Computing Science, Umeå University, Umeå, Sweden.
    Kurtser, Polina
    Department of Industrial Engineering and Management Ben-Gurion, University of the Negev, Beer Sheva, Israel.
    Edan, Yael
    Department of Industrial Engineering and Management Ben-Gurion, University of the Negev, Beer Sheva, Israel.
    Strategies for selecting best approach direction for a sweet-pepper harvesting robot2017Ingår i: Towards Autonomous Robotic Systems (Taros 2017) / [ed] Yang Gao, Saber Fallah, Yaochu Jin, Constantina Lekakou, Cham: Springer, 2017, s. 516-525Konferensbidrag (Refereegranskat)
    Abstract [en]

    An autonomous sweet pepper harvesting robot must perform several tasks to successfully harvest a fruit. Due to the highly unstructured environment in which the robot operates and the presence of occlusions, the current challenges are to improve the detection rate and lower the risk of losing sight of the fruit while approaching the fruit for harvest. Therefore, it is crucial to choose the best approach direction with least occlusion from obstacles.

    The value of ideal information regarding the best approach direction was evaluated by comparing it to a method attempting several directions until successful harvesting is performed. A laboratory experiment was conducted on artificial sweet pepper plants using a system based on eye-in-hand configuration comprising a 6DOF robotic manipulator equipped with an RGB camera. The performance is evaluated in laboratorial conditions using both descriptive statistics of the average harvesting times and harvesting success as well as regression models. The results show roughly 40–45% increase in average harvest time when no a-priori information of the correct harvesting direction is available with a nearly linear increase in overall harvesting time for each failed harvesting attempt. The variability of the harvesting times grows with the number of approaches required, causing lower ability to predict them.

    Tests show that occlusion of the front of the peppers significantly impacts the harvesting times. The major reason for this is the limited workspace of the robot often making the paths to positions to the side of the peppers significantly longer than to positions in front of the fruit which is more open.

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    Strategies for selecting best approach direction for a sweet-pepper harvesting robot
  • Ringdahl, Ola
    et al.
    Department of Computing Science, Umeå University, Umeå, Sweden.
    Kurtser, Polina
    Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
    Edan, Yael
    Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
    Evaluation of approach strategies for harvesting robots: Case study of sweet pepper harvesting2019Ingår i: Journal of Intelligent and Robotic Systems, ISSN 0921-0296, E-ISSN 1573-0409, Vol. 95, nr 1, s. 149-164Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Robotic harvesters that use visual servoing must choose the best direction from which to approach the fruit to minimize occlusion and avoid obstacles that might interfere with the detection along the approach. This work proposes different approach strategies, compares them in terms of cycle times, and presents a failure analysis methodology of the different approach strategies. The different approach strategies are: in-field assessment by human observers, evaluation based on an overview image using advanced algorithms or remote human observers, or attempting multiple approach directions until the fruit is successfully reached. In the latter approach, each attempt costs time, which is a major bottleneck in bringing harvesting robots into the market. Alternatively, a single approach strategy that only attempts one direction can be applied if the best approach direction is known a-priori. The different approach strategies were evaluated for a case study of sweet pepper harvesting in laboratorial and greenhouse conditions. The first experiment, conducted in a commercial greenhouse, revealed that the fruit approach cycle time increased 8% and 116% for reachable and unreachable fruits respectively when the multiple approach strategy was applied, compared to the single approach strategy. The second experiment measured human observers’ ability to provide insights to approach directions based on overview images taken in both greenhouse and laboratorial conditions. Results revealed that human observers are accurate in detecting unapproachable directions while they tend to miss approachable directions. By detecting fruits that are unreachable (via automatic algorithms or human operators), harvesting cycle times can be significantly shortened leading to improved commercial feasibility of harvesting robots.

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    Evaluation of approach strategies for harvesting robots: Case study of sweet pepper harvesting
  • Harel, Ben
    et al.
    Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer Sheva, Israel .
    Kurtser, Polina
    Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer Sheva, Israel .
    van Herck, Liesbet
    Proefstation voor de Groenteteelt, Sint-Katelijne-Waver, Belgium .
    Parmet, Yisrael
    Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer Sheva, Israel .
    Edan, Yael
    Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer Sheva, Israel .
    Sweet pepper maturity evaluation via multiple viewpoints color analyses2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    Maturity evaluation is an important feature for selective robotic harvesting. This paper focuses on maturity evaluationderived by a color camera for a sweet pepper robotic harvester. Fruit visibility for sweet peppers is limited to 65% andmultiple viewpoints are necessary to detect more than 90% of the fruit. This paper aims to determine the number ofviewpoints required to determine the maturity level of a sweet pepper and the best single viewpoint. Different colorbased measures to estimate the maturity level of a pepper were evaluated. Two datasets were analyzed: images of 54yellow bell sweet peppers and 30 red peppers both harvested at the last fruit setting; all images were taken in uniformillumination conditions with white background. Each pepper was photographed from 5-6 viewpoints: one photo of thetop of the pepper, one photo of the bottom and 3-4 photos of the pepper sides. Each pepper was manually tagged by ahuman professional observer as ‘mature’ or ‘immature’. Image processing routines were implemented to extract colorlevel measures which included different hue features. Results indicates high correlation between the sides to the bottomview, the bottom view shows the best 0.86 correlation in the case of yellow peppers while the side view shows the best0.835 correlation in the case of red peppers (the bottom view yields 0.82 correlation).

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    Sweet pepper maturity evaluation via multiple viewpoints color analyses
  • Rai, Neha
    et al.
    Organismal and Evolutionary Biology, Faculty of Biological and Environmental Sciences, and Viikki Plant Science Centre, University of Helsinki, Helsinki, Finland.
    O'Hara, Andrew
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Farkas, Daniel
    School of Science and Technology, Örebro University, Örebro, Sweden.
    Safronov, Omid
    Organismal and Evolutionary Biology, Faculty of Biological and Environmental Sciences, and Viikki Plant Science Centre, University of Helsinki, Helsinki, Finland.
    Ratanasopa, Khuanpiroon
    School of Science and Technology, Örebro University, Örebro, Sweden.
    Wang, Fang
    Organismal and Evolutionary Biology, Faculty of Biological and Environmental Sciences, and Viikki Plant Science Centre, University of Helsinki, Helsinki, Finland.
    Lindfors, Anders V.
    Finnish Meteorological Institute, Meteorological Research, Helsinki, Finland.
    Jenkins, Gareth I.
    Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary an Sciences, University of Glasgow, Glasgow, United Kingdom.
    Lehto, Tarja
    School of Forest Sciences, University of Eastern Finland, Joensuu, Finland.
    Salojärvi, Jarkko
    Organismal and Evolutionary Biology, Faculty of Biological and Environmental Sciences, and Viikki Plant Science Centre, University of Helsinki, Helsinki, Finland; School of Biological Sciences, Nanyang Technological University, Singapore, Singapore.
    Brosché, Mikael
    Organismal and Evolutionary Biology, Faculty of Biological and Environmental Sciences, and Viikki Plant Science Centre, University of Helsinki, Helsinki, Finland.
    Strid, Åke
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Aphalo, Pedro J.
    Organismal and Evolutionary Biology, Faculty of Biological and Environmental Sciences, and Viikki Plant Science Centre, University of Helsinki, Helsinki, Finland.
    Morales, Luis O.
    Örebro universitet, Institutionen för naturvetenskap och teknik. Organismal and Evolutionary Biology, Faculty of Biological and Environmental Sciences, and Viikki Plant Science Centre, University of Helsinki, Helsinki, Finland.
    The photoreceptor UVR8 mediates the perception of both UV-B and UV-A wavelengths up to 350 nm of sunlight with responsivity moderated by cryptochromes2020Ingår i: Plant, Cell and Environment, ISSN 0140-7791, E-ISSN 1365-3040, s. 1-15Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The photoreceptors UV RESISTANCE LOCUS 8 (UVR8) and CRYPTOCHROMES 1 and 2 (CRYs) play major roles in the perception of UV-B (280–315 nm) and UV-A/blue radiation (315–500 nm), respectively. However, it is poorly understood how they function in sunlight. The roles of UVR8 and CRYs were assessed in a factorial experiment with Arabidopsis thaliana wild-type and photoreceptor mutants exposed to sunlight for 6 h or 12 h under five types of filters with cut-offs in UV and blue-light regions. Transcriptome-wide responses triggered by UV-B and UV-A wavelengths shorter than 350 nm (UV-Asw) required UVR8 whereas those induced by blue and UV-A wavelengths longer than 350 nm (UV-Alw) required CRYs. UVR8 modulated gene expression in response to blue light while lack of CRYs drastically enhanced gene expression in response to UV-B and UV-Asw. These results agree with our estimates of photons absorbed by these photoreceptors in sunlight and with in vitro monomerization of UVR8 by wavelengths up to 335 nm. Motif enrichment analysis predicted complex signaling downstream of UVR8 and CRYs. Our results highlight that it is important to use UV waveband definitions specific to plants’ photomorphogenesis as is routinely done in the visible region.

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    The photoreceptor UVR8 mediates the perception of both UV-B and UV-A wavelengths up to 350 nm of sunlight with responsivity moderated by cryptochromes
  • Kellgren, Jan
    Linköpings universitet, Affärsrätt.
    IAS 10 Events after the Reporting Period Problematized: Some Questions Regarding the Standard’s (Read by its Letter) Understandability2018Ingår i: Skattenytt, ISSN 0346-1254, s. 3-35Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Events after the reporting period is an interesting phenomenon, as they areboth very common and can be tricky to address correctly. Yet, quite surprisingly,not much research has been carried out on how to interpret the rulesregarding events after the reporting period. This article is written from a legalperspective, with the purpose of looking closely at the wording of the IAS 10, inorder to discuss if, or to what extent, it is clear enough to (as far as possible) givethe management of a business (or auditors, courts etc.) sufficient clarity onhow to handle events after the reporting period – or if, and if so how, the rulesare unclear. Some hints de lege ferenda (what improvements could be made inthe standard?) are also given, with the purpose of making the IAS 10 clearer.

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    FULLTEXT01
  • Lugnegård, Tove
    et al.
    Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet, Sweden.
    Bejerot, Susanne
    Örebro universitet, Institutionen för medicinska vetenskaper. University Health Care Research Centre.
    Retrospective parental assessment of childhood neurodevelopmental problems: the use of the Five to Fifteen questionnaire in adults2019Ingår i: BJPsych Open, E-ISSN 2056-4724, Vol. 5, nr 3, artikel-id e42Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND: Attention-deficit hyperactivity disorder and autism are increasingly recognised in adults. For a diagnostic evaluation, parental information on childhood development is needed. However, no instruments that retrospectively describe neurodevelopmental problems in childhood are validated for evaluating adults. The 181-item parent-report questionnaire Five to Fifteen (FTF) is nevertheless frequently used for assessments in adulthood.

    AIMS: To examine if FTF is reliable for obtaining retrospective neurodevelopmental history among young adults.

    METHOD: Details of parents who had assessed their children with the FTF for neuropsychiatric evaluation were retrieved and they were asked to complete the FTF again 10-19 years later. Agreements between original and retrospective scorings were analysed.

    RESULTS: Long-term reliability for FTF varies considerably between individual items. Several difficulties are reported as more severe at the retrospective scoring than at the original scoring. A selection of 24 items (FTF-Brief) with good agreement over time, is presented for use in adult psychiatry settings.

    CONCLUSION: Neuropsychiatric symptoms may fluctuate over time and become more prominent when demands increase. Informants' recollections of their child's neurodevelopmental symptoms may be a selection of symptoms that are longstanding rather than present at a specific age in childhood.

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    Retrospective parental assessment of childhood neurodevelopmental problems: the use of the Five to Fifteen questionnaire in adults
  • Hesselmark, Eva
    et al.
    Department of Clinical Neuroscience, Center for Psychiatry Research,Karolinska Institutet; Stockholm Health Care Services, Stockholm County Council, Sweden.
    Bejerot, Susanne
    Örebro universitet, Institutionen för medicinska vetenskaper.
    Clinical features of paediatric acute-onset neuropsychiatric syndrome: findings from a case-control study2019Ingår i: BJPsych Open, E-ISSN 2056-4724, Vol. 5, nr 2, artikel-id e25Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND: Paediatric acute-onset neuropsychiatric syndrome (PANS), an umbrella term that includes PANDAS (paediatric autoimmune neuropsychiatric disorders associated with streptococcal infections) is suggested to be a psychiatric disorder of autoimmune aetiology. PANS is characterised by an acute onset of obsessive-compulsive disorder or restricted eating with multiple comorbid symptoms. The specificity of the PANS criteria is not fully understood.AimsTo describe a cohort of patients with PANS and to determine if PANS features relating to symptoms, onset and course are more common in PANS than in other psychiatric conditions.

    METHOD: A case-control study comparing patients with interview-confirmed PANS with patients with suspected PANS and patients with a psychiatric condition but with no suspicion of PANS. Validated and non-validated measures of symptoms, onset and episodic course were used.

    RESULTS: Illness in patients with interview-confirmed PANS featured an episodic course and multiple symptoms present at onset compared with the psychiatric controls. However, individuals with interview-confirmed PANS did not present a specific symptom profile.

    CONCLUSIONS: PANS may be a distinct clinical entity featuring an acute onset, an episodic course and multiple symptoms at onset.Declaration of interestNone.

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    Clinical features of paediatric acute-onset neuropsychiatric syndrome: findings from a case–control study
  • Berggren, Lilian
    et al.
    Örebro universitet, Institutionen för juridik, psykologi och socialt arbete.
    Lindberg, Lene
    Department of Public Health Sciences Karolinska Institutet & Center for Epidemiology and Community Medicine, Stockholm County Council, Karolinska Institutet, Stockholm, Sweden.
    Glatz, Terese
    Örebro universitet, Institutionen för juridik, psykologi och socialt arbete.
    Skoog, Therese
    Department of Psychology, University of Gothenburg, Göteborg, Sweden.
    A First Examination of the Role of International Child Development Programme in School Achievement2020Ingår i: Scandinavian Journal of Educational Research, ISSN 0031-3831, E-ISSN 1470-1170Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The aim of this study was to explore whether the classroomi mplementation of the International Child Development Programme (ICDP) for secondary school students (grade 9) was linked to better school achievement. The goal of the ICDP is to increase school achievement by promoting positive teacher-student relationships. The study, performed in Sweden, applied a pre–post design (four years) with matched intervention and control schools (N = 148). The post-intervention assessments showed that there were significant differences in school achievement in Grade 9 between the intervention school andthe control school. Specifically, a greater proportion of students at the intervention school demonstrated improvement in school subjects and achieved the competency requirements to enter an upper secondary school programme. Based on the results, the ICDP can be considered an important intervention to promote student learning by promoting positive teacher-student relationships.

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    A First Examination of the Role of the International Child Development Programme in School Achievement
  • Kristoffersson, Eleonor
    et al.
    Örebro universitet, Institutionen för juridik, psykologi och socialt arbete.
    Strandberg, ThomasÖrebro universitet, Institutionen för juridik, psykologi och socialt arbete.
    Ageing in a changing society: Interdisciplinary popular science contributions from the Newbreed research school2019Samlingsverk (redaktörskap) (Övrig (populärvetenskap, debatt, mm))
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    Aging in a changing society: Interdisciplinary popular science contributions from the Newbreed research school
  • Mahdi, Aamir
    et al.
    Örebro universitet, Institutionen för medicinska vetenskaper. Department of Orthopaedics.
    Svantesson, Mia
    Region Örebro län. Örebro universitet, Institutionen för hälsovetenskaper. University Health Care Research Center.
    Wretenberg, Per
    Örebro universitet, Institutionen för medicinska vetenskaper. Department of Orthopaedics.
    Hälleberg Nyman, Maria
    Örebro universitet, Institutionen för hälsovetenskaper.
    Patients’ experiences of discontentment one year after total knee arthroplasty: a qualitative study2020Ingår i: BMC Musculoskeletal Disorders, ISSN 1471-2474, E-ISSN 1471-2474, Vol. 21, nr 1, artikel-id 29Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND: Total knee arthroplasty is a common procedure with generally good results. However, there are still patients who are dissatisfied without known explanation. Satisfaction and dissatisfaction have previously been captured by quantitative designs, but there is a lack of qualitative studies regarding these patients' experiences. Qualitative knowledge might be useful in creating strategies to decrease the dissatisfaction rate.

    METHODS: Of the 348 patients who responded to a letter asking if they were satisfied or dissatisfied with their surgery, 61 (18%) reported discontent. After excluding patients with documented complications and those who declined to participate, semi-structured interviews were conducted with 44 patients. The interviews were analyzed according to qualitative content analysis. The purpose was to describe patients' experiences of discontentment 1 year after total knee arthroplasty.

    RESULTS: The patients experienced unfulfilled expectations and needs regarding unresolved and new problems, limited independence, and lacking of relational supports. They were bothered by pain and stiffness, and worried that changes were complications as a result of surgery. They described inability to perform daily activities and valued activities. They also felt a lack of relational supports, and a lack of respect and continuity, support from health care, and information adapted to their needs.

    CONCLUSION: Patient expectation seems to be the major contributing factor in patient discontentment after knee replacement surgery. This qualitative study sheds light on the on the meaning of unfulfilled expectations, in contrast to previous quantitative studies. The elements of unfulfilled expectations need to be dealt with both on the individual staff level and on the organizational level. For instance, increased continuity of healthcare staff and facilities may help to improve patient satisfaction after surgery.

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    Patients' experiences of discontentment one year after total knee arthroplasty: a qualitative study
  • Edström, Daniel
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik. Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden.
    Lavesson, Nils
    ABB Corporate Research, Västerås, Sweden.
    Ögren, Magnus
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    Forces on parallel three-phase AC-conductors during a phase to ground fault2019Konferensbidrag (Refereegranskat)
    Abstract [en]

    We consider the problem of calculating forces on high current solid conductors, as is present in various types of electrical installations e.g. in substations [1]. An example of such an installation with three parallel conductors is shown in Figure 1. The conductor forces are important for the design of the station, in particular for the conductor geometry and mechanical support.

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    Forces on parallel three-phase AC-conductors during a phase to ground fault
  • Andersen, Jon Aarum
    Örebro universitet, Handelshögskolan vid Örebro Universitet.
    Trust in Managers Revisited: Antecedents, Mediating Factors, and Consequences2019Ingår i: Dynamic relationships management journal, ISSN 2232-5867, E-ISSN 2350-367X, Vol. 8, nr 2, s. 65-73Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The first purpose of this paper is to find the reasons why subordinates trust their managers in private organizations. The second purpose is related to whether there are national differences in the degree of subordinates’ trust in their managers. Studies from two European countries are presented which were based on the same instrument for measuring subordinates’ trust. These studies concluded that managers’ actions are the antecedent to trust. Managers are, however, trusted to different degrees. It appears that managers need to show by their actions that they trust their subordinates, offer help and guidance, show appreciation to the subordinates, and solve problems adequately. The antecedent was the managers’ proximity to the subordinates. Other studies found more antecedents. Additionally, a number of positive consequences of trust in managers – reported in other studies – are work performance, job satisfaction, and subordinates’ motivation. Some questions regarding trust in managers still need answers. They are formulated but not answered in this paper. 

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    TRUST IN MANAGERS REVISITED ‐ ANTECEDENTS, MEDIATING FACTORS, AND CONSEQUENCE
  • Heikkilä, Mia
    et al.
    Utbildningsvetenskap och Matematik, Mälardalens högskola, Västerås.
    Lillvist, AnneMälardalens högskola, Utbildningsvetenskap och Matematik, Västerås.
    Flerspråkighet för lärande i förskola, förskoleklass och årskurs ett: Perspektiv från tre samproduktionsprojekt2017Samlingsverk (redaktörskap) (Refereegranskat)
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    Flerspråkighet för lärande i förskola, förskoleklass och årskurs ett: Perspektiv från tre samproduktionsprojekt
  • Trenta, Cristina
    Örebro universitet, Institutionen för juridik, psykologi och socialt arbete.
    Juridicum Anthology 20192019Samlingsverk (redaktörskap) (Övrig (populärvetenskap, debatt, mm))
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    Juridicum Anthology 2019
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    Cover
  • Susha, Iryna
    Örebro universitet, Handelshögskolan vid Örebro Universitet. Section ICT, Faculty of Technology, Policy and Management, Delft University of Technology, The Netherlands .
    Establishing and implementing data collaborations for public good: A critical factor analysis to scale up the practice2020Ingår i: Information Polity, ISSN 1570-1255, E-ISSN 1875-8754, Vol. 25, nr 1, s. 3-24Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Data analytics for public good has become a hot topic thanks to the inviting opportunities to utilize ‘new’ sources of data, such as social media insights, call detail records, satellite imagery etc. These data are sometimes shared by the private sector as part of corporate social responsibility, especially in situations of urgency, such as in case of a natural disaster. Such partnerships can be termed as ‘data collaboratives’. While experimentation grows, little is known about how such collaborations are formed and implemented. In this paper, we investigate the factors which are influential and contribute to a successful data collaborative using the Critical Success Factor (CSF) approach. As a result, we propose (1) a framework of CSFs which provides a holistic view of elements coming into play when a data collaborative is formed and (2) a list of Top 15 factors which highlights the elements which typically have a greater influence over the success of the partnership. We validated our findings in two case studies and discussed three broad factors which were found to be critical for the formation of data collaboratives: value proposition, trust, and public pressure. Our results can be used to help organizations prioritize and distribute resources accordingly when engaging in a data collaborative.

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    Establishing and implementing data collaborations for public good: A critical factor analysis to scale up the practice
  • Lilliedahl, Jonathan
    Örebro universitet, Musikhögskolan.
    Specialised music classes in comprehensive education: a case study of the Swedish shift from social-democratic uniformity to neoliberal diversity2020Ingår i: Journal of Educational Administration & History, ISSN 0022-0620, E-ISSN 1478-7431Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The following article examines the emerging historical legitimacy of specialised comprehensive schools in Sweden. During the 1980s, neoliberal ideas were gaining ground in Swedish educational policy. As a result, the social democratic government began to relax the rigour of the unified, state-regulated educational system. Specialised music classes played a significant role in this context, as such programmes were increasingly considered models for specialisation and deregulation. The establishment of specialised music classes in Sweden was symptomatic of the national adoption of neoliberal principles in education policy.

    The case study design uses qualitative document analyses of archive materials including public investigations, minutes of political meetings, and newspaper debates. The discursive legitimation of specialised comprehensive education is seen as dependent on three interrelated frame factors: ideology, economics, and law. Within this framework empirical knowledge of the transformative educational policy of the 1980s is analysed.

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    Specialised music classes in comprehensive education: a case study of the Swedish shift from social-democratic uniformity to neoliberal diversity
  • Steinberg, Maria
    Örebro universitet, Institutionen för juridik, psykologi och socialt arbete.
    Employees' rights to influence the work environment and some challenges2019Ingår i: Festskrift till Örjan Edström / [ed] Ruth Mannelqvist, Staffan Ingmanson, Carin Ulander-Wänman, Umeå: Umeå universitet , 2019, 1, s. 469-483Kapitel i bok, del av antologi (Övrigt vetenskapligt)
    Abstract [en]

    A presentation of the employees' right to influence the work environment accordning to the Swedish Work Environment Law and a study of its implementation.

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    Employees’ rights to influence the work environment and some challenges
  • Steinberg, Maria
    Örebro universitet, Institutionen för juridik, psykologi och socialt arbete.
    Safety Delegates and the Implementation of the Organisational and Social Work Environment2018Ingår i: Festskrift till Håkan Hydén / [ed] Reza Banakar, Karl Dahlstrand, Lotti Ryberg Welander, Lund: Juristförlaget, Lund, 2018, 1, s. 641-658Kapitel i bok, del av antologi (Övrigt vetenskapligt)
    Abstract [en]

    The article is an investigation about how the safety delegates can influnce the Work Environment Authority in matters of psychosocial issues. 

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    Safety Delegates and the Implementation of the Organisational and Social Work Environment
  • Adolfsson, Peter
    et al.
    Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, Sweden .
    Strömgren, Agneta
    The Hospital of Halland, Sweden .
    Mattsson, Stig
    Faculty of Health Sciences and Medicine, Örebro University Hospital, Sweden .
    Chaplin, John E.
    Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, Sweden.
    Jendle, Johan
    Faculty of Health Sciences and Medicine, Örebro University Hospital, Orebro, Sweden.
    Education and individualized support regarding exercise and diabetes improves glucose control and level of physical activity in type 1 diabetes individuals2015Ingår i: Journal of Endocrinology Diabetes & Obesity, E-ISSN 2333-6692, Vol. 3, nr 2, s. 1071-1077Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background: Physical activity is advocated in all individuals with diabetes. However, good glycemic control can be difficult to achieve due to exercise induced glucose excursions.

    Objective: To evaluate the impact on glucose control of a structured diabetes education concerning physical activity, delivered via the web/internet together with telemedical care (individualized feedback by phone).

    Methods: Eighty-two individuals with type 1 (T1D) were included in the pre-race intervention and randomized into two groups: intervention (I) (n=48) and control (C) (n=48). Both groups received web-based training of sports and nutrition in relation to diabetes. The intervention group also received structured and individualized feedback on two different occasions. HbA1c was measured at baseline, after 3 and 6 months when a 45 km cross-country skiing race (the HalvVasa) was performed. Only the individuals attending the skiing race were eligible to be included in the study. Level of Physical Activity (LPA), Multidimensional Health Locus of Control (MHLC) and Confidence In Diabetes Self-care (CIDS) were assessed at baseline and after 7 months.

    Results: HbA1c at start was 58.5 ± 10.0 (I) respectively 60.7 ± 9.5 (C) mmol/mol. At 3 months 56.7 ± 8.7 (I) respectively 61.0 ± 9.6 (C) mmol/mol and at 6 months 55.7 ± 8.1 (I) respectively 60.3 ± 9.7 (C) mmol/mol. A significant in (I) at 3 months: 2.2 ± 3.8 mmol/mol (0.7-3.7, 95% CI), (p<0.05) and after 6 months: 2.8 ± 5.5 mmol/mol (0.5-5.0, 95% CI), (p<0.05). No reduction was seen in (C). However between the two groups no difference was noted. The LPA was increased in 52% of the participants in (I) respectively 7% in (C), a significant difference, p<0.05. No differences were seen regarding HbA1c or LPA in the control group.

    Conclusion: Education and individualized feedback, delivered via telemedicine, to physical active individuals with T1D resulted in improvements in glycemic control within the intervention group and improved level of physical activity and locus of control when compared to the control group(12) (PDF) Education and individualized support regarding exercise and diabetes improves glucose control and level of physical activity in type 1 diabetes individuals.

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    Education and individualized support regarding exercise and diabetes improves glucose control and level of physical activity in type 1 diabetes individuals
  • Memedi, Mevludin
    et al.
    Örebro universitet, Handelshögskolan vid Örebro Universitet.
    Aghanavesi, Somayeh
    Computer Engineering, Dalarna University, Sweden.
    A partial least-squares regression model to measure Parkinson’s disease motor states using smartphone data2020Ingår i: Proceedings of the 53rd Hawaii International Conference on System Sciences | 2020, Maui, Hawaii: HCSS , 2020, s. 1056-1062Konferensbidrag (Refereegranskat)
    Abstract [en]

    Design choices related to development of data- driven models significantly impact or degrade predictive performance of the models. One of the essential steps during development and evaluation of such models is the choice of feature selection and dimension reduction techniques. That is imperative especially in cases dealing with multimodal data gathered from different sources. In this paper, we will investigate the behavior of Partial Least Squares (PLS) regression for dimension reduction and prediction of motor states of Parkinson’s disease (PD) patients, using upper limb motor data gathered by means of a smartphone. The results in terms of correlations between smartphone-based and clinician-derived scores were compared to a previous study using the same data where principal component analysis (PCA) and support vector machines (SVM) were used. The findings from this study show that PLS is superior in terms of prediction performance of motor states in PD than combining PCA and SVM. This indicates that PLS could be considered as a useful methodology in problems where data-driven analysis is needed.

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    A partial least-squares regression model to measure Parkinson’s disease motor states using smartphone data
  • Hedin, Staffan
    Jan W Morthensons Alla Marcia1982Ingår i: Nutida Musik, ISSN 1652-6082, nr 4, s. 9-12Artikel i tidskrift (Övrigt vetenskapligt)
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    Jan W Morthensons Alla Marcia
  • Hedin, Staffan
    E Lundkvist, Geistliche Musik in Schweden: Nysaklighet eller osaklighet1981Ingår i: Nutida Musik, ISSN 1652-6082, nr 4, s. 46-47Artikel, recension (Övrig (populärvetenskap, debatt, mm))
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    E Lundkvist, Geistliche Musik in Schweden
  • Hedin, Staffan
    et al.
    Thyresson Hedin, Maria
    Lågorna är många...: Om musiken i Psalmer och visor 76/821982Ingår i: Svenskt Gudstjänstliv, ISSN 0280-9133, s. 73-78Artikel i tidskrift (Övrigt vetenskapligt)
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    Lågorna är många...: Om musiken i Psalmer och visor 76/82
  • Hedin, Staffan
    Om jordnära arbete, att sikta mot stjärnorna och att nå trädtoppar: om arbetet med IMUS-projektet2000Ingår i: PPU serien, ISSN 1500-2209, nr 6, s. 49-72Artikel i tidskrift (Övrigt vetenskapligt)
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    Om jordnära arbete, att sikta mot stjärnorna och att nå trädtoppar: Om arbetet med IMUS-projektet
  • Hedin, Staffan
    Sven-Erik Bäck, Signos: Signaler i en brytningstid1981Ingår i: Nutida Musik, ISSN 1652-6082, nr 3, s. 20-20Artikel i tidskrift (Övrigt vetenskapligt)
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    Sven-Erik Bäck, Signos: Signaler i en brytningstid
  • Hedin, Staffan
    Själens musik vid livets gräns: En analys av Ákos Rózmanns "Bilder inför drömmen och döden"1981Ingår i: Nutida Musik, ISSN 1652-6082, nr 1, s. 44-47Artikel i tidskrift (Övrigt vetenskapligt)
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    Själens musik vid livets gräns: En analys av Ákos Rózmanns "Bilder inför drömmen och döden"