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  • 3401.
    Arab, Asghar
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Stommel, L.
    Saarland University.
    Wallström, Lennart
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Fibre Orientation Investigation in Short Natural Fibre Reinforced Composites Using Synchrotron Imaging2013Conference paper (Refereed)
  • 3402. Araghchi, Ali
    Service quality, customer satisfaction, customer experience and behavioral intention in Iranian retail stores2008Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The Conceptual Framework regarding Service Quality, Customer Satisfaction, Customer Experience and behavioral Intention in Iranian Retail Stores with 500 questionner shows the effectiveness of the Experience for the Customers in the Retailing Industry.

  • 3403. Arasteh, Fariba
    et al.
    Arbab, Fereshteh
    Studying Changes in Corporative Society Retail Store Sales as a Result of Shelves’ Rearrangement and Promotions Based on Market Basket Analysis: An Assessment of Corporative Society Retail Store of Ministry of Finance During the Year 2014 - Tehran2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Economic situations of societies have direct impacts on buying behaviors of the citizens. Iran inflammatory recession economy resulted in deduction of GDP. Government employees suffered more since the rate of inflammation was almost twice the size of their yearly raise. Therefore as a result the purchasing power of these families reduced drastically and even though the corporate society retail stores tried to keep the prices as low as possible, still there are goods expired and unsold. Retailers owned vast amounts of data however lack of technologies made these data hard to save and sort resulting in poor information extracted from those data. Introduction of new technologies helped data mining and data analysis majorly. Data mining a rather new concept have a positive impact on retail stores in various aspects from inventory to promotional strategies. Market basket analysis is a type of data mining and its best example for a very useful technique in finding affinities amongst items in consumer shopping baskets. Such information are basis for decision making process of marketing activities. This is a very new concept in Iran’s market and the idea of it being able to affect a homogeneous customers of a corporate society retail store seemed very interesting. The main objective of the thesis is to see how different products assortment interrelate and how to exploit these relations by rearranging. Mining association rules from transactional data will provide us with valuable information about co-occurrences and co-purchases of products. Such information can be used as a basis for decisions about marketing activity such as promotional support, inventory control and cross-sale campaigns.

  • 3404.
    Arasteh Khouy, Iman
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Cost-effective maintenance of railway track geometry: a shift from safety limits to maintenance limits2013Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Railway infrastructure is a complex system which comprises different subsystems. Long life span is one of the important aspects of this prime mode of transport. However, the useful life of its assets is highly dependent on the maintenance and renewal strategy used during the assets’ life cycle. Today’s demands on the railway industry call for increased capacity, including more trains, travelling at higher speeds with higher axle loads. This increased usage results in higher degradation of railway assets and higher maintenance costs. Formerly, railway maintenance procedures were usually planned based on the knowledge and experience of the infrastructure owner. The main goal was to provide a high level of safety, and there was little concern for economic issues. Today, however, the deregulated competitive environment and budget limitations are forcing railway infrastructures to move from safety limits to cost-effective maintenance limits to optimise operation and maintenance procedures. The goal is to make operation and maintenance cost-effective while still meeting high safety standards.One of the main parameters to assure railway safety and comfortable railway service is to maintain high quality of track geometry. Poor quality of track geometry, directly or indirectly, may result in safety problems, speed reduction, traffic disruption, greater maintenance cost and higher degradation rate of the other railway components (e.g. rails, wheels, switches and crossings etc.). The aim of this study is to develop a methodology to optimise track geometry maintenance by specifying cost-effective maintenance limits. The methodology is based on reliability and cost analysis and supports the maintenance decision-making process. The thesis presents a state-of-the-art review of track geometry degradation and maintenance optimisation models. It also includes a case study carried out on the iron ore line in the north of Sweden to analyse the track geometry degradation and discuss possible reasons for the distribution of failures along the track over a year. It describes Trafikverket’s (Swedish Transport Administration) maintenance strategy regarding measuring, reporting on and improving track quality, and it evaluates the efficiency of this strategy. It introduces two new approaches to analyse the geometrical degradation of turnouts due to dynamic forces generated from train traffic. In the first approach, the recorded measurements are adjusted at crossing point and then the relative geometrical degradation of turnouts is evaluated by using two defined parameters, the absolute residual area (ARa) and the maximum settlement (Smax). In the second approach, various geometry parameters are defined to estimate the degradation in each measurement separately. It also discusses optimisation of the track geometry inspection interval with a view to minimising the total ballast maintenance costs per unit traffic load. The proposed model considers inspection time and the maintenance-planning horizon time after inspection and takes into account the costs associated with inspection, tamping and risk of accidents due to poor track quality. Finally, it proposes a cost model to identify the cost-effective maintenance limit for track geometry maintenance. The model considers the actual longitudinal level degradation rates of different track sections as a function of million gross tonnes (MGT) / time and the observed maintenance efficiency.

  • 3405.
    Arasteh khouy, Iman
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Optimization of track geometry maintenance: a study of track geometry degradation to specify optimal inspection intervals2011Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Railway infrastructure is a complex system which comprises different subsystems. Long useful life span is one of the important aspects of this prime mode of transport. The useful life length of its assets is highly dependent on the maintenance and renewal strategy used during its life cycle. Today’s demands on the railway industry call for increased capacity, including more trains, travelling at higher speeds with higher axle loads. This increased usage will result in higher degradation of railway asset and higher maintenance costs. However, due to the competitive environment and limited budgets, railway infrastructure managers are compelled to optimize operation and maintenance procedures to decrease operation and maintenance costs while meeting high safety standards. To assure track safety and maintain high quality, a cost effective track maintenance strategy is required, one based not only on technical and/or safety limits but also on cost-effective maintenance thresholds. RAMS (Reliability, Availability, Maintainability and Safety) and LCC (Life Cycle Cost) analyses, which are derived from reliable track condition data, provide an approach to specify cost effective maintenance strategy to lessen corrective maintenance actions and downtimes.One of the main parameters to assure railway safety and comfortable railway service is to maintain high quality of track geometry. Poor track geometry quality, directly or indirectly, may result in safety problems, speed reduction, traffic disruption, greater maintenance cost and higher degradation rate of the other railway components (e.g. rails, wheels, switch, crossings etc.). The aim of this study is to develop a methodology to optimize track geometry maintenance by using historical geometry data. The methodology is based on reliability and cost analysis and supports the maintenance decision-making process to identify cost-effective inspection interval. An important phase of track geometry maintenance optimization is to estimate the track degradation rate. Obtaining knowledge about degradation helps to properly schedule maintenance activities such as inspection and tamping.The thesis provides a methodology to identify a cost-effective inspection interval based on track degradation rate and cost drivers. It contains state-of-the-art track geometry maintenance optimization. It describes Trafikverket’s (Swedish Transport Administration) maintenance strategy regarding measurements, reporting on and improving track quality, and it evaluates the efficiency of this strategy. Finally, it includes a case study carried out on the iron ore line in north of Sweden that runs from Boden to Gällivare to evaluate track geometry degradation and analyze the probability distributions of failures. A cost model is developed in order to find optimal inspection interval.Keywords: Track geometry degradation, Track maintenance optimization, Maintenance planning, Tamping

  • 3406.
    Arasteh khouy, Iman
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Larsson-Kråik, Per-Olof
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Nissen, Arne
    Trafikverket.
    Juntti, Ulla
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Schunnesson, Håkan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Optimisation of track geometry inspection interval2014In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, ISSN 0954-4097, E-ISSN 2041-3017, Vol. 228, no 5, p. 546-556Article in journal (Refereed)
    Abstract [en]

    The measurement and improvement of track quality are key issues in determining the time at which railway maintenance must be performed and its cost. Efficient track maintenance ensures optimum allocation of limited maintenance resources which has an enormous effect on maintenance efficiency. Applying an appropriate tamping strategy helps reduce maintenance costs, making operations more cost-effective and leading to increased safety and passenger comfort levels. This paper discusses optimisation of the track geometry inspection interval with a view to minimising the total ballast maintenance costs per unit traffic load. The proposed model considers inspection time, the maintenance-planning horizon time after inspection and takes into account the costs associated with inspection, tamping and risk of accidents due to poor track quality. It draws on track geometry data from the iron ore line (Malmbanan) in northern Sweden, used by both passenger and freight trains, to find the probability distribution of geometry faults.

  • 3407.
    Arasteh khouy, Iman
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Larsson-Kråik, Per-Olof
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Nissen, Arne
    Trafikverket.
    Kumar, Uday
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Cost-effective track geometry maintenance limits2016In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, ISSN 0954-4097, E-ISSN 2041-3017, Vol. 230, no 2, p. 611-622Article in journal (Refereed)
    Abstract [en]

    In the past, railway maintenance actions were usually planned based on the knowledge and experience of the infrastructure owner. The main goal was to provide a high level of safety, and there was little concern about economic and operational optimisation issues. Today, however, a deregulated competitive environment and budget limitations are forcing railway infrastructures to move from safety limits to cost-effective maintenance limits to optimise operation and maintenance procedures. By so doing, one widens the discussion to include both operational safety and cost-effectiveness for the whole railway transport system. In this study, a cost model is proposed to specify the cost-effective maintenance limits for track geometry maintenance. The proposed model considers the degradation rates of different track sections and takes into account the costs associated with inspection, tamping, delay time penalties, and risk of accidents due to poor track quality. It draws on track geometry data from the Iron Ore Line (Malmbanan) in northern Sweden, used by both passenger and freight trains, to estimate the geometrical degradation rate of each section. The methodology is based on reliability and cost analysis and facilitates the maintenance decision-making process to identify cost-effective maintenance thresholds.

  • 3408.
    Arasteh khouy, Iman
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Larsson-Kråik, Per-Olof
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Nissen, Arne
    Kumar, Uday
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Geometrical degradation of switches and crossings on a Swedish heavy haul railroad: a case study2013In: Proceedings of 10th International Heavy Haul Association Conference, New Delhi, India, 2013, Vol. 1, p. 26-32Conference paper (Refereed)
    Abstract [en]

    Switches and crossings (S&Cs) are one of the most critical components of railway track systems in terms of safety, operation and maintenance. Each year, a considerable part of the maintenance budget is spent on inspection, maintenance and renewal of S&Cs. However, applying a cost-effective maintenance strategy helps to achieve the best performance at the lowest possible cost. In Sweden, the geometry of S&Cs is inspected at pre-defined time intervals by the STRIX track measurement car. In this paper, time series for the measured longitudinal level of S&Cs on the Iron Ore Line (Malmbanan) in northern Sweden have been used. Two parameters have been defined in this study, namely the absolute residual area (ARa) and the maximum settlement (Smax), to analyse the geometrical degradation of switches and crossings due to dynamic forces generated from train traffic. The paper also evaluates the growth rate of the longitudinal level degradation as a function of million gross tonnes (MGT). The results facilitate correct decision making in the maintenance process through understanding the degradation rate and defining the optimal maintenance thresholds for the planning process. In the long run this will lead to a cost-effective maintenance strategy with optimized inspection and maintenance intervals.

  • 3409.
    Arasteh khouy, Iman
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Larsson-Kråik, Per-Olof
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Nissen, Arne
    Trafikverket.
    Lundberg, Jan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Kumar, Uday
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Geometrical degradation of railway turnouts: a case study from a Swedish heavy haul railroad2014In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, ISSN 0954-4097, E-ISSN 2041-3017, Vol. 228, no 6, p. 611-619Article in journal (Refereed)
    Abstract [en]

    Turnouts are critical components of track systems in terms of safety, operation and maintenance. Each year, a considerable part of the maintenance budget is spent on their inspection, maintenance and renewal. Applying a cost-effective maintenance strategy helps to achieve the best performance at the lowest possible cost. In Sweden, the geometry of turnouts is inspected at predefined time intervals using the STRIX / IMV 100 track measurement car. This study uses time series for the measured longitudinal level of turnouts on the Iron Ore Line (Malmbanan) in northern Sweden. Two different approaches are applied to analyse the geometrical degradation of turnouts due to dynamic forces generated by train traffic. In the first approach, the recorded measurements are adjusted at the crossing point and then the relative geometrical degradation of turnouts is evaluated by using two defined parameters, the absolute residual area and the maximum settlement, In the second approach, various geometry parameters are defined to estimate the degradation in each measurement separately. The growth rate of the longitudinal level degradation as a function of million gross tonnes / time is evaluated. The proposed methods are based on characterisation of the individual track measurements. The results facilitate correct decision-making in the maintenance process through understanding the degradation rate and defining the optimal maintenance thresholds for the planning process. In the long run, this can lead to a cost-effective maintenance strategy with optimised inspection and maintenance intervals.

  • 3410.
    Arasteh khouy, Iman
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Schunnesson, Håkan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Juntti, Ulla
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Nissen, Arne
    Larsson-Kråik, Per-Olof
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Evaluation of track geometry maintenance for heavy haul railroad in Sweden: a case study2014In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, ISSN 0954-4097, E-ISSN 2041-3017, Vol. 228, no 5, p. 496-503Article in journal (Refereed)
    Abstract [en]

    The measurement and improvement of track quality are key issues in determining both the restoration time and cost of railway maintenance. Applying the optimal tamping strategy helps reduce maintenance costs, making operations more cost effective and leading to increased safety and passenger comfort. In this paper, track geometry data from the iron ore line (Malmbanan) in northern Sweden, which handles both passenger and freight trains, are used to evaluate track geometry maintenance in cold climate. The paper describes Trafikverket’s (Swedish Transport Administration) tamping strategy and evaluates its effectiveness in measuring, reporting, and improving track quality. Finally, it evaluates the performance of the maintenance contractor and discusses the importance of the functional requirements stated in the outsourcing contracts.

  • 3411.
    Arasteh khouy, Iman
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Schunnesson, Håkan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Nissen, Arne
    Trafikverket.
    Juntti, Ulla
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
    Evaluation of track geometry degradation in Swedish heavy haul railroad: a case study2012In: International Journal of COMADEM, ISSN 1363-7681, Vol. 15, no 2, p. 11-16Article in journal (Refereed)
    Abstract [en]

    The measurement and improvement of track quality are key issues in determining both the time and cost of railway maintenance. Efficient track geometry maintenance ensures optimum allocation of limited maintenance resources and has an enormous effect on maintenance efficiency. Applying the appropriate tamping strategy also helps reduce maintenance costs, making operations more cost effective and leading to increased safety and passenger comfort. In this paper, track geometry data from the iron ore line in northern Sweden, which handles both passenger and freight trains, are used to calculate track quality degradation trend in a cold climate. The paper describes Trafikverket’s (Swedish Transport Administration) tamping strategy and illustrates the distribution of safety failures in different seasons. It also analyses the track geometry degradation and discuss about the possible reasons for distribution of failures over a year and along the track.

  • 3412.
    Araujo Soto, Víctor Estuardo
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Performance evaluation of scalable and distributed iot platforms for smart regions2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    As the vision of the Internet of Things (IoT) becomes a reality, thousands of devices will beconnected to IoT platforms in smart cities and regions. These devices will actively send dataupdates to cloud-based platforms, as part of smart applications in domains like healthcare, trafficand pollution monitoring. Therefore, it is important to study the ability of modern IoT systemsto handle high rates of data updates coming from devices. In this work we evaluated the per-formance of components of the Internet of Things Services Enablement Architecture of theEuropean initiative FIWARE. We developed a testbed that is able to inject data updates usingMQTT and the CoAP-based Lightweight M2M protocols, simulating large scale IoT deploy-ments. Our extensive tests considered the vertical and horizontal scalability of the componentsof the platform. Our results found the limits of the components when handling the load, and thescaling strategies that should be targeted by implementers. We found that vertical scaling is notan effective strategy in comparison to the gains achieved by horizontally scaling the databaselayer. We reflect about the load testing methodology for IoT systems, the scalability needs ofdifferent layers and conclude with future challenges in this topic.

  • 3413.
    Araujo, Victor
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Saguna, Saguna
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Performance evaluation of FIWARE: A cloud-based IoT platform for smart cities2019In: Journal of Parallel and Distributed Computing, ISSN 0743-7315, E-ISSN 1096-0848, Vol. 132, p. 250-261Article in journal (Refereed)
    Abstract [en]

    As the Internet of Things (IoT) becomes a reality, millions of devices will be connected to IoT platforms in smart cities. These devices will cater to several areas within a smart city such as healthcare, logistics, and transportation. These devices are expected to generate significant amounts of data requests at high data rates, therefore, necessitating the performance benchmarking of IoT platforms to ascertain whether they can efficiently handle such devices. In this article, we present our results gathered from extensive performance evaluation of the cloud-based IoT platform, FIWARE. In particular, to study FIWARE’s performance, we developed a testbed and generated CoAP and MQTT data to emulate large-scale IoT deployments, crucial for future smart cities. We performed extensive tests and studied FIWARE’s performance regarding vertical and horizontal scalability. We present bottlenecks and limitations regarding FIWARE components and their cloud deployment. Finally, we discuss cost-efficient FIWARE deployment strategies that can be extremely beneficial to stakeholders aiming to deploy FIWARE as an IoT platform for smart cities.

  • 3414.
    Arboleda, Jhon
    Luleå University of Technology.
    Hälsopromotion i offentlig sektor2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 3415.
    Arboleda, Jhon
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences.
    Hälsopromotion i offentlig sektor2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of the study is to research how employees perceive health promoting work in the organization. The data collection chosen for the study was semi structure interviews, ten employees were selected at random. The summary shows that the organization today is perceived to have a good basic health promotion that complies with statutory regulations and guidelines. It has also been established which factors and areas are of importance for promoting health in the organization. Respondents point out that the important areas for promoting health are the social environment, unity, good communication with management, a supportive work environment, control over work, stimulating demands and clarity both in responsibility, roles and changes in the organization. Results show health promotion in general and which areas the respondents perceive need more resources and work. The unity among the respondents varied, but there was some wholeness that could determine certain areas that showed both opportunities and be liabilities for the employees. Respondents are satisfied with health promotion today in general terms but the biggest underlying reason that creates obstacles for employees is rooted in the organization's financial assets. In relationship with the economy, the respondents feel that much has changed about their work situations, which they do not feel completely aware of. In summary, the organization needs to focus on health promotion from an Empowerment point of view, strengthening work relationships through teambuilding, encourage development through education, provide more information during uncertain situations. Also offer counseling support and ultimately increase awareness among employees about their work environment.

  • 3416.
    Arbuthnott, A.
    et al.
    Umeå School of Business and Economics, Umeå University.
    Eriksson, J.
    Umeå School of Business and Economics, Umeå University.
    Thorgren, Sara
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Innovation and Design.
    Wincent, Joakim
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Innovation and Design.
    Reduced opportunities for regional renewal: The role of rigid threat responses2011In: Entrepreneurship and Regional Development, ISSN 0898-5626, E-ISSN 1464-5114, Vol. 23, no 7-8, p. 603-635Article in journal (Refereed)
    Abstract [en]

    This article illustrates how opportunities for regional renewal in a peripheral region may be reduced by rigid threat responses undertaken by established firms operating within traditional regional industry. In an inductive case study of new biorefinery industry initiatives in a region where traditional pulp-and-paper and forestry industry was in decline, we used primary and secondary data to outline how a set of new industry players who created innovative ways of using existing regional infrastructures and resources sparked rigid threat responses among established firms from the struggling traditional industry. Established industry firms framed new industry initiatives as threats, and responded by (1) reducing new industry actors' possibilities for new business development, (2) engaging in entrenched resistance, (3) creating collaborative illusions and (4) undermining the fundamentals of the new industry. Consequently, this study contributes to existing literature by proposing the potential of applying the threat-rigidity thesis on a regional level. This is achieved by illustrating that conflicting behaviours between new and established regional industry actors constrain opportunities for regional renewal in a peripheral region. As such, relevant directions for future research and policy implications are outlined

  • 3417.
    Arbuthnott, Andrew
    et al.
    Umeå universitet.
    Eriksson, Jessica
    Umeå universitet.
    Wincent, Joakim
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Innovation and Design.
    When a new industry meets traditional and declining ones: an integrative approach towards dialectics and social movement theory in a model of regional industry emergence processes2010In: Scandinavian Journal of Management, ISSN 0956-5221, E-ISSN 1873-3387, Vol. 26, no 3, p. 290-308Article in journal (Refereed)
    Abstract [en]

    This paper takes an integrative approach towards dialectics and social movement theories in a model of regional industry emergence processes. Based on an inductive qualitative investigation we describe how a new industry emerges in a declining and peripheral region dominated by struggling and traditional local industry. The emanating model of regional industry emergence is based on four main processes; framing processes, movement mobilisation processes, inter-industry relational processes and dialectical processes, which together shape the emerging regional industry. This exemplifies how new regional industry mobilisation efforts provide an ‘anti-thesis' to traditional industry, and how established industry actors respond with contestation to protect their business concepts. Furthermore we illustrate how new industry actors reframe their concepts to complement dominating traditional industry and to overcome tensions and conflicts. Following dialectic interaction between new and traditional industry we noticed signs of acceptance and synthesis between the newly formed and old industry actors; ultimately resulting in a revitalisation of the region's traditional industry. As such, the paper makes a point of accounting for agency and productive conflict when understanding regional industry renewal and emergence.

  • 3418.
    Arbuthnott, Andrew
    et al.
    Umeå university.
    Hannibal, Martin
    University of Southern Denmark.
    Nybacka, Mikael
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Innovation and Design.
    Renewing industry cluster developments through interregional university-industry pipelines and sensemaking2011In: International Journal of Innovation and Regional Development, ISSN 1753-0660, E-ISSN 1753-0679, Vol. 3, no 6, p. 604-631Article in journal (Refereed)
    Abstract [en]

    This paper aims to improve understanding of regional development processes in relation to industry-university links and cluster development. An innovative regional automotive test industry cluster, located in a peripheral region of northern Sweden, is the empirical case at hand. Key findings from our longitudinal investigation show how once the local automotive test industry reached a certain maturity that renewal was sought via developing interregional links with universities. However, due to misunderstandings and imbalance of motives between the respective regional industry and non-local universities, disruptions to the renewal were experienced. Despite such challenges, new university-industry pipelines were able to open and enact renew of the industry clusters development. This occurs through what we term an ‘interregional sensegiving and sensemaking process’ that in our case take place between personal communication and meeting were trust is an important factor. Subsequently, with particular focus on regional industry cluster development and university-industry links this paper contributes to existing literature by showing the potential of applying sensemaking on a regional level and provides relevant implications for theory and practise.

  • 3419. Arbuthnott, Andrew
    et al.
    Wincent, Joakim
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Innovation and Design.
    Eriksson, Jessica
    A study of establishment processes and entrepreneurial industry emergence in a Swedish region facing difficulties2008In: International Council for Small Business World Conference: June 22-25 2008, Halifax, Nova Scotia, Canada, ICSB , 2008Conference paper (Refereed)
    Abstract [en]

    This paper explores establishment processes of a new industry located in a peripheral region of Sweden that is based upon old traditional industries in decline. Based on a qualitative study, we identify how actors within the new industry interact and intervene with the existing infrastructures and institutions that support the old local industry while trying tobuild new infrastructures. We identify key restricting and supporting mechanisms for the establishment processes, with implications for policy and regional and entrepreneurship research.

  • 3420. Arcordh, Sebastian
    Utveckling av ett inbyggt tåglängdmätsystem baserat på induktiv avkänning2011Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The aim of this thesis was to develop a train length measurement system. With such a system it is possible for the railway traffic control to know on which passing loop a specific train can meet another train. It will lead to other benefits, such as less interference sensitive traffic and thus improved punctuality. This report describes the functionality and development process of an embedded train length measurement system. The Different methods are discussed and evaluated before the inductive method is choosen. The result is a stable system with good accuracy to a low cost. This thesis is made for the Swedish transport administration.

  • 3421. Ardah, Khaled
    Indoor Models of Heterogeneous Networks2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Technology evolution over the last few years added many demands on mobile networks. To be able to support and handle the new technologies requirement and keep the customers satisfied, network operators need to increase the capacity, coverage, and performance of their networks. Low power nodes considered a promising method to satisfy future demands. This thesis work describes implementation of the 3GPP indoor pico models (TR36.814) for LTE heterogeneous networks and investigations by means of simulation for different scenarios to better understand the impacts of deployment position, interference, and load balance on system performance. The simulator is MATLAB based provided from Ericsson Research AP. It has found that, pico nodes coverage area is limited to indoor. In most of the cases, the transition zone area (i.e. where the optimal cell selections differ between downlink and uplink) is covered by the building wall. The users in the transition zone area indoors have acceptable performance, comparing with the ones outdoor, since degrade in their SINR level is less. In addition, low power nodes are able to handle larger load traffic share than macro nodes since they are more protected thus they have better channel conditions than macro nodes.

  • 3422.
    Ardakani, M.G.
    et al.
    Imperial College of Science Technology and Medicine.
    McLean, M.
    Shollock, B.A.
    Luleå tekniska universitet.
    Twin formation during creep in single crystals of nickel-based superalloys1999In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 47, no 9, p. 2593-2602Article in journal (Refereed)
  • 3423. Ardin, Pia
    et al.
    Lingebrant, Philip
    Omställning vid produktion av rullager: kartläggning och analys av interna lösningar för ställ mellan öppna och tätade lager vid SKF i Göteborg2010Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 3424. Ardland Bojvall, Johanna
    et al.
    Nolkrantz, Frida
    Olsson, Tyra
    A study of bacterial growth and THM in Riga drinking water network2002Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Mikrobiell tillväxt och bildning av biofilm i ledningsnät för dricksvatten är ett betydande tekniskt, estetiskt och hygieniskt problem för vattenproducenter. För att motverka den bakteriella tillväxten används ofta klor som desinfektionsmedel. Vid klorering av dricksvatten kan cancerogena biprodukter bildas, t ex trihalometaner (THM), då klor reagerar med organiskt material i vattnet. Störst är risken för detta när råvattnet har högt innehåll av organiskt material. Målet med det här examensarbetet var att hitta den optimala klordosen för att minimera produktionen av THM och den bakteriella tillväxten i ledningsnätet från ett dricksvattenverk där vattnet renas med kemisk koagulering och råvattnet har högt humusinnehåll. Studien genomfördes i distributionsnätet från Daugava vattenreningsverk i Riga, Lettland. Arbetet baserades på litteraturstudier, fältstudier och experiment. Under fältstudierna för biofilm, undersöktes bakterietillväxten på två platser längs distributionsnätet, en provplats var placerad i slutet av reningsverket, precis i början av ledningsnätet och den andra 15 km därifrån. Biofilmsinsamlare innehållande små plastcylindrar placerades vid provpunkterna. På försöksplatserna kontrollerades även temperatur, klorrest och näringsinnehåll i vattnet. För THM-projektet togs proverna från det utgående vattnet i reningsverket. I 10 THM-prover styrdes klordos, temperatur och kontakttid och därtill analyserades 6 prover utan påverkan. Resultaten analyserades statistiskt och med hjälp av multipel regression byggdes en matematisk modell upp. Resultaten av biofilmsförsöken visade att temperaturen påverkade den bakteriella tillväxten i båda provtagningspunkterna. Klor däremot verkade påverka tillväxten i början av ledningsnätet medan inget sådant samband kunde urskiljas 15 km ifrån reningsverket. Detta kan bero på att klorresten i denna punkt var för låg för att kunna påverka den mikrobiella tillväxten där. En modell för att beräkna THM utifrån andra parametrar konstruerades: THM = -0,04+10,72 Cl + 4,21 Temp. Den här modellen visar att THM-halten i vattnet producerat vid Daugavas vattenreningsverk kan överstiga EU:s gränsvärde för THM på 100µg/l. Särskilt stor är risken under sommaren då temperaturen stiger och klordosen i vattnet ofta höjs. För att undvika höga halter av THM är det viktigt att vattnet som produceras vid Daugava verket innehåller en låg klordos. För att motverka biofilmsbildningen i ledningsnätet bör processerna i verket optimeras för maximalt borttagande av näringsämnen.

  • 3425. Ardland, Helena
    et al.
    Jonsson, Pia
    Planering av drevsatstillverkning: utveckling av ett operativt produktionsplaneringsverktyg baserat på cyklisk planering1996Independent thesis Advanced level (degree of Master (Two Years)), 40 credits / 60 HE creditsStudent thesis
    Abstract [sv]

    Syftet med detta examensarbete var att hitta en lämplig metod för produktionsplanering vid tillverkning av drevsatser på Volvo Personvagnar AB Transmission i Köping, och att utifrån denna metod utveckla ett operativt planeringsverktyg

    Den största svårigheten för produktionsplaneringen idag ansågs vara otillräcklig information om behov från kund, genomloppstider samt kapacitet, omställningstider och maskinhaverier. Därför utfördes en kartläggning av nuläget för att få underlag till val av produktionsplaneringsmetod och utformning av planeringsverktyg. Viktiga informationskällor under hela arbetets gång har varit Volvos datorbaserade informationssystem, cicspv, och intervjuer med berörd personal.

    Cyklisk planering valdes som metod att utveckla planeringsverktyget ifrån. Valet baserades på att en bra produktionsplanering ska hålla leveranstiderna, vara produktionsmässigt bra, hålla lagernivåer på en rimlig nivå, vara störningstålig samt enkel att använda som verktyg.

    Det operativa verktyg för produktionsplanering som sedan utvecklades består av två delar, en cyklisk plan för när tillverkning av respektive artikel ska påbörjas samt ett kalkylblad för bestämning av produktionsorderkvantitet. Eftersom behoven varierar har även säkerhetslager för artiklarna dimensionerats.

    Produktionssimulering med Witness användes både vid utveckling av verktyget och vid utvärdering av resultatet. För utvärdering av verktyget utfördes en simulering där produktionen möttes av efterfrågan. Simuleringarna visar att vid tillverkning enligt det framtagna verktyget minskar summan av kapitalbindningskostnader och bristkostnader betydligt jämfört med 1995 års siffror.

    Den största faran för planeringsverktyget är hemtagning av råmaterial. Finns material inte tillgängligt när det behövs så fungerar inte verktyget.

  • 3426. Arellano Sanzol, Juan
    Video feedback control of pulverized coal flow2001Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This master’s thesis deals with the single-line control of pulverized coal flow into a blast furnace. Towards this end a coal flow estimate based upon video image analysis is used as a soft sensor. The pulverized coal injection has been studied through identification experiments and subsequent data analysis. Mathematical black-box models for the dynamics between the flow control valve and the soft sensor output have been developed. A control structure has been suggested, and the first steps towards controller implementation have been completed. The objective is to minimize the variations of the coal flow into the blast furnace. Problems associated with the implementation of the scheme discussed and recommendations are done for further work on used video image analysis for control purposes. All experiments have been performed at blast furnace no.3 (lance 4) at SSAB Tunnplåt AB Luleå, Sweden.

  • 3427.
    Arenas, Julia Martinez
    et al.
    Ecole National Superieure de Telecommunications, Site de Toulouse.
    Landström, Daniel
    Department of Electrosciences, Lund Institute of Technology, Luleå tekniska universitet, Department of Applied Electronics, Lund University.
    Beek, Jaap van de
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Börjesson, Per Ola
    Lund Institute of Technology, Department of Applied Electronics.
    Boucheret, Marie-Laure
    Ecole Nationale Supérieure des Télécommunications.
    Ödling, Per
    Department of Electrosciences, Lund Institute of Technology.
    Synchronization in OFDM systems: Sensitivity to the choice of pulse shape1997Conference paper (Refereed)
  • 3428. Arenas Lindmark, Paula
    REDS: redundant and expandable distributed file storage system for a serverless network2009Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Peer-to-peer (P2P) storage systems are an interesting and emerging field, providing new possibilities for distributed applications. P2P storage systems allow a network of collaborating nodes to increase the availability of their data by store replicas of the data on other nodes in the network. Reasons they are preferred over traditional client-server systems include fault tolerance, availability and scalability. Despite their significant potential, current peer-to-peer storage systems lack in their defense gainst cheating nodes who attempt to use more storage space than they provide. This thesis addresses this deficiency and presents "REDS - Redundant and Expandable Distributed file Storage system for a serverless network", which has a novel approach to overcome the problem with cheating nodes who tries to falsify information in a peer-to-peer storage system. REDS uses a ranking system based on different kinds of requests to locate and suspend malicious nodes in the system. A working prototype of the proposed system has been implemented in Java on top of the FreePastry implementation of the Pastry routing layer. Furthermore, a graphical user interface for the prototype has been implemented. Simulation results, based on freepastry's own simulator, indicate that REDS scales well and is able to efficiently support a large number of nodes.

  • 3429.
    Arendarenko, L. S.
    et al.
    Department of Fundamental and Applied Mathematics, Eurasian National University, Munaitpasov str. 4, Astana.
    Oinarov, R.
    Department of Fundamental and Applied Mathematics, Eurasian National University, Munaitpasov str. 4, Astana.
    Persson, Lars-Erik
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mathematical Science.
    Some New Hardy-type Integral Inequalities on Cones of Monotone Functions2013In: Advances in Harmonic Analysis and Operator Theory: The Stefan Samko Anniversary Volume, Basel: Encyclopedia of Global Archaeology/Springer Verlag, 2013, p. 77-89Chapter in book (Refereed)
    Abstract [en]

    Some new Hardy-type inequalities with Hardy-Volterra integral operators on the cones of monotone functions are obtained. The case 1 < p ≤ q < ∞ is considered and the involved kernels satisfy conditions which are less restrictive than the classical Oinarov condition.

  • 3430.
    Arendarenko, Larissa
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mathematical Science.
    Estimates for Hardy-type integral operators in weighted Lebesgue spaces2013Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    This PhD thesis deals with the theory of Hardy-type inequalities in a new situation, namely when the classical Hardy operator is replaced by a more general operator with a kernel. The kernels we consider belong to the new classes $\mathcal{O}^+_n$ and $\mathcal{O}^-_n$, $n=0,1,...$, which are wider than co-called Oinarov class of kernels. This PhD thesis consists of four papers (papers A, B, C and D), two complementary appendixes (A$_1$, C$_1$) and an introduction, which put these publications into a more general frame. This introduction also serves as a basic overview of the field. In paper A some boundedness criteria for the Hardy-Volterra integral operators are proved and discussed. The case $1<q<p<\infty$ is considered and the involved kernels are from the classes $\mathcal{O}^+_1$ and $\mathcal{O}^-_1$. A complete solution of the problem is presented and discussed. The appendix to paper A contains the proof of Theorem 3.1, which is not included in the paper. In paper B even more complicated (than in paper A) case with variable limits on the Hardy operator is investigated. The main results of the paper are proved by applying the block-diagonal method given by Batuev and Stepanov and the results from paper A. Paper C deals with Hardy-type inequalities restricted to the cones of monotone functions. The case $1<p\le q<\infty$ is considered and the involved kernels satisfy conditions, which are less restrictive than the usual Oinarov condition. Also in this case a complete solution is obtained and some concrete applications are pointed out. In particular, in paper C some open questions are raised. These questions are discussed and solved in an appendix to Paper C. In paper D we study superpositions of the Hardy-Volterra integral operator and its adjoint. The boundedness and compactness criteria in the range of parameters $1<p\le q<\infty$ are obtained and discussed. Moreover, some new properties of the classes $\mathcal{O}^+_n$ and $\mathcal{O}^-_n$ are proved.

  • 3431.
    Arendarenko, Larissa
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Some new Hardy type inequalities connected to kernel operators with variable intervals of integration2011Report (Other academic)
  • 3432.
    Arendarenko, Larissa
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mathematical Science.
    Some new Hardy-type Inequalities for integral operators with kernels2011Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    This Licentiate thesis deals with the theory of Hardy-type inequalities in anew situation, namely when the classical Hardy operator is replaced by amore general operator with kernel. The kernels we consider belong to thenew classes O+ n and O-n , n = 0; 1; :::, which are wider than co-called Oinarovclass of kernels.The thesis consists of three papers (papers A, B and C), an appendix topaper A and an introduction, which gives an overview to this specific fieldof functional analysis and also serves to put the papers in this thesis into amore general frame.In paper A some new Hardy-type inequalities for the case with Hardy-Volterra integral operators involved are proved and discussed. The case 1

  • 3433.
    Arendarenko, Larissa
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Oinarov, Ryskul
    L.N. Gumilyov Eurasian National University, Eurasian National University, Astana, Faculty of Mathematics and Information Technologies, Eurasian National University, Munaitpasov st., 5, Astana.
    The boundedness and compactness of superpositions of Hardy-type integral operators2013Report (Refereed)
  • 3434.
    Arendarenko, Larissa
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Oinarov, Ryskul
    L.N. Gumilyov Eurasian National University.
    Persson, Lars-Erik
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mathematical Science.
    On the boundedness of some classes of integral operators in Lebesgue spaces2011Report (Other academic)
  • 3435.
    Arendarenko, Larissa
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Oinarov, Ryskul
    Persson, Lars-Erik
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mathematical Science.
    On the boundedness of some classes of integral operators in weighted Lebesgue spaces2012In: Eurasian Mathematical Journal, ISSN 2077-9879, Vol. 3, no 1, p. 5-17Article in journal (Refereed)
  • 3436.
    Arendarenko, Larissa
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics.
    Oinarov, Ryskul
    Persson, Lars-Erik
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mathematical Science.
    Some new inequalities on cones of monotone functions2011Report (Other academic)
  • 3437. Arenvall, Sofia
    Arbetsterapeuters resonemang om livsstilsbalans hos personer inom psykiatrisk öppenvård2015Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of the study was to describe occupational therapists reasoning about lifestyle balance among people in psychiatric care. The writer used a qualitative design and interviewed five occupational therapists working in psychiatric care in northern Sweden, using a semi structured interview guide. The data was analysed using qualitative content analysis. The results generated three main categories: “Having balance”, “Finding motivation” and “Supporting change”. The occupational therapists reasoned that personal economy was an important part of having balance. Further, the occupational therapists reasoned about group activities as a source for motivation. Reasoning was also about group activities as a motivation for living a healthier lifestyle. Encouraging personal planning was reasoned as one way to support lifestyle changes. Implications for further research are the need for knowing how occupational therapists can support participation in the society for people in psychiatric care, which is an important presumption of lifestyle balance.

  • 3438. Aresh, Afshin
    Real-Time Voice Chat Realized in JavaScript2012Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Today it is possible to run most applications directly in the browser; people spend more and more time in front of a Web browser. Since audio and video communication is part of the Internet experience, major browsers are searching for ways to standardize real-time communication in Web browsers, without the need of plug-in installation. This thesis presents the possibility for real-time communication between browsers realized in JavaScript. The goal is to combine HTML5 with Mozilla audio data API for communication between browsers. To start with, the built-in media support for audio element of HTML5 has been used to embed the audio file. Extracting the samples from the audio element is done by implementing the Mozilla audio data API. These samples are compressed with a G.711 A-law codec; the codec will compress the input data by 50%. For transferring the data to the destination client and being able to receive data from the client a two-way communication channel is required. The HTML5 WebSocket API provides full-duplex communication over a single Transmission Control Protocol (TCP). The server environment chosen to support this was Node.js. All above combined together give the possibility of sending data between browsers through a server.

  • 3439. Aresh, Ellen Edjegul
    Nord Pools olika prisområden, samma marknad?2011Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Sweden is about to change through the separation into different price areas on the common Nordic electricity market. Many Scandinavian countries, acting at the Nord Pool, are already divided into several price areas. Different price areas in different countries mean that one country has different prices on one market, Nord Pool. The definition of a relevant market can be explored using various price series and to analyse if they follow long-term trend. The purpose of this paper is to examine whether the countries that are divided into different price zones in Nord Pool belong to a single market. To answer the question cointegration tests will be performed on countries such as Norway and Denmark which are divided into several price areas. Time series based on monthly data from six different price areas from January 2002 to March 2010 is used in the thesis. The results show that countries like Norway and Denmark are integrated into one market whether or not they are divided into several price areas for trade on Nord Pool. Price variations occur in the short term, in both Denmark and Norway, although the price areas in the country belong to a single market in the long run.

  • 3440. Aresh, Ellen Edjegul
    et al.
    Hagström, Frida
    Norrländska konsumenters betalningsvilja för lokalproducerat vs KRAV-märkt2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 3441.
    Areskoug Josefsson, Kristina
    Samrehab, Värnamo Sjukhus.
    The Role of Physiotherapy to Enhance Sexual Health in Chronic Disease2014In: Journal of Sexual Medicine, ISSN 1743-6095, E-ISSN 1743-6109, Vol. 11, no Suppl. 1, p. 90-Article in journal (Refereed)
  • 3442.
    Areskoug Josefsson, Kristina
    Jönköping University, The Jönköping Academy for Improvement of Health and Welfare.
    Using resources and addressing challenges: It is time to include sexual health in therapy2016In: International Journal of Therapy and Rehabilitation, ISSN 1741-1645, E-ISSN 1759-779X, Vol. 23, no 4, p. 156-157Article in journal (Refereed)
  • 3443.
    Areskoug Josefsson, Kristina
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Juuso, Päivi
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Gard, Gunvor
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Rolander, Bo
    Jönköping University.
    Larsson, Agneta
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Health Care Students' Attitudes Toward Addressing Sexual Health in Their Future Profession: Validity and reliability of a questionnaire2016In: International Journal of Sexual Health, ISSN 1931-7611, E-ISSN 1931-762X, Vol. 28, no 3, p. 243-250Article in journal (Refereed)
    Abstract [en]

    Objectives: To test the reliability and validity of the Students' Attitudes Towards Addressing Sexual Health questionnaire (SA-SH), measuring students' attitudes towards addressing sexual health in their future professions.

    Method: A cross-sectional online survey (22 items) were distributed to 186 nursing, occupational therapy and physiotherapy students in Sweden, April 2015. Validity and reliability were tested.

    Results: The construct validity analysis led to three major factors: present feelings of comfortableness, future working environment and fear of negative influence on future patient relations. The construct validity, internal consistency reliability and intrarater reliability showed good results.Conclusion: The SA-SH is valid and reliable.

  • 3444.
    Areskoug Josefsson, Kristina
    et al.
    Samrehab, Värnamo Hospital.
    Kammerlind, Ann-Sofi C.
    Futurum – The Academy of Healthcare, Jönköping.
    Lund-Levander, Martha
    Futurum – The Academy of Healthcare, Jönköping.
    Evidence-based practice in a multiprofessional context2012In: International Journal of Evidence-Based Healthcare, ISSN 1744-1595, E-ISSN 1744-1609, Vol. 10, no 2, p. 117-125Article in journal (Refereed)
    Abstract [en]

    Background  Healthcare today is a complex system with increasing needs of specific knowledge of evaluation of research and implementation into clinical practice. A critical issue is that we all apply evidence-based practice (EBP) with standardised methods and continuing and systematic improvements. EBP includes both scientific and critical assessed experience-based knowledge. For the individual, this means applying evidence-based knowledge to a specific situation, and for the organisation, it means catering for a systematic critical review and evaluation and compiling research into guidelines and programmes. In 2009, the County Council of Jönköping had approximately 335 000 inhabitants and the healthcare organisation had more than 10 000 employees. As the County Council actively promotes clinical improvement, it is interesting to explore how healthcare employees think about and act upon EBP. The aim of this survey was therefore to describe factors that facilitate or hinder the application of EBP in the clinical context.

    Method  A quantitative study was performed with a questionnaire to healthcare staff employed in the County Council of Jönköping in 2009. The questionnaire consisted of questions concerning which factors are experienced to affect the development of evidence-based healthcare. There were 59 open and closed questions, divided into the following areas:

    • • Sources of knowledge used in practice
    • • Barriers to finding and evaluating research reports and guidelines
    • • Barriers to changing practice on the basis of best evidence
    • • Facilitating factors for changing practice on the basis of best evidence
    • • Experience in finding, evaluating and using different sources of evidence

    The participants were selected using the county council's staff database and included medical, caring and rehabilitative staff within hospitals, primary care, dentistry and laboratory medicine. The inclusion criteria were permanent employment and clinical work. Invitations were sent to 5787 persons to participate in the study and 1445 persons answered the questionnaire.

    Results  Knowledge used in daily clinical practice was mainly based on information about the patient, personal experience and local guidelines. Twenty per cent answered that they worked ‘in the way they always had’, and 11% responded that they used evidence from research as a basis for change. The participants experienced that EBP was not used enough in clinical healthcare and explained this with practical and structural barriers, which they thought should be better monitored by the organisation and directors.

    Conclusion  Overall, the results indicate that the scientific evidence for healthcare is not used sufficiently as a base for decisions in daily practice as well as for changing practice. This is more prominent among assistant staff. As a consequence, this might affect the care of the patients in a negative way. Increased awareness of EBP and a stronger evidence-based approach are keys in the ongoing improvement work in the county. Local guidelines seem to be a way to implement knowledge. But, as the arena of activities is complex and the employees have diverse education levels, different strategies to facilitate and promote EBP are necessary.

  • 3445.
    Areskoug Josefsson, Kristina
    et al.
    Högskolan i Jönköping, The Jönköping Academy for Improvement of Health and Welfare.
    Larsson, Agneta
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Gard, Gunvor
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Rolander, Bo
    Högskolan i Jönköping, HHJ, Avd. för beteendevetenskap och socialt arbete.
    Juuso, Päivi
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Health care students' attitudes towards working with sexual health in their professional roles - survey of students at nursing, physiotherapy and occupational therapy programmes2016In: Conference abstracts: Pre-conference abstracts, 2016Conference paper (Refereed)
  • 3446.
    Areskoug Josefsson, Kristina
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Larsson, Agneta
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Gard, Gunvor
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Rolander, Bo
    Jönköping University, Futurum, Academy for Health and Care, Jönköping County Council.
    Juuso, Päivi
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Health Care Students’ Attitudes Towards Working with Sexual Health in Their Professional Roles: Survey of Students at Nursing, Physiotherapy and Occupational Therapy Programmes2016In: Sexuality and disability, ISSN 0146-1044, E-ISSN 1573-6717, Vol. 34, no 3, p. 289-302Article in journal (Refereed)
    Abstract [en]

    The aim of this study was to explore differences and similarities in health care students’ attitudes towards working with and communicating with patients about sexual health issues in their future professions. The aim was also to explore whether the students’ gender, age and future professions were influencing factors and whether there was a change in attitude depending on educational levels, gender, age and future professions. The study also aimed to explore the potential development of those differences and similarities in attitudes between health care students having achieved different levels of education and training in their future professions. A cross-sectional quantitative study was performed with an online survey distributed to nursing, occupational therapy and physiotherapy students. The students believed that they needed increased sexual health education and increased communication skills about sexual health. Gender and future profession are factors that significantly affect the attitudes of the students towards working with sexual health. Nursing and occupational therapy students have a more positive attitude towards addressing sexual health in their future professions than do physiotherapy students. Further research is needed in this field to improve competence in sexual health for all student groups, particularly physiotherapy students. Further research is also needed to explore the significance of gender regarding education in sexual health and attitudes towards working with sexual health.

  • 3447.
    Areskoug Josefsson, Kristina
    et al.
    Värnamo Hospital.
    Öberg, Ulrika
    Futurum - The Academy of Healthcare, County Council, Jönköping.
    A literature review of the sexual health of women with rheumatoid arthritis2009In: Musculoskeletal Care, ISSN 1478-2189, E-ISSN 1557-0681, Vol. 7, no 4, p. 219-226Article in journal (Refereed)
    Abstract [en]

    Sexual health problems are common for women with Rheumatoid Arthritis, RA. Sexual health is covered in the International Classification of Functioning, Disability and Health (ICF) by two different fields: sexual function and intimate relationships, which are included in the ICF core sets for RA. Most patients with RA are female, and there are differences concerning sexual health between women and men with RA. The aim of this study was to explore the literature concerning the effects of RA on the sexual health of female patients, and also recommend solutions to improve the sexual health of women with RA. Sexual health problems can occur before, during and after sexual activities, and can affect women's sexual health in different perspectives. The investigated areas concerning female RA-patients and sexual are general sexual problems, sexual satisfaction, sexual desire, sexual performance, and sexual functioning. RA affects sexual health as a result of pain, reduced joint mobility, fatigue, depression and body image alterations. The investigated material provides few solutions to sexual health problems of female RA- patients. The most commonly mentioned solution is increased information and communication between health professionals and patients. Some of the studies recommend physiotherapy. Further research is needed to understand which types of intervention can help women with RA to improve their sexual health

  • 3448.
    Areskoug-Josefsson, Kristina
    et al.
    Department of Health Sciences, Division of Physiotherapy, Lund University.
    Ekdahl, Charlotte
    Department of Health Sciences, Division of Physiotherapy, Lund University.
    Jakobsson, Ulf
    Center for Primary Health Care Research, CRC, Lund University.
    Gard, Gunvor
    Detecting decreased sexual health with MDHAQ-S2013In: Health, ISSN 1949-4998, E-ISSN 1949-5005, Vol. 5, no 6B, p. 38-47Article in journal (Refereed)
    Abstract [en]

    There are instruments that measure sexual function or sexual health for persons with RA, but since sexual health is a sensitive issue, the hypothesis is that it would be easier to have a standard questionnaire that could indicate the need for communication about sexual health issues instead of an extra questionnaire with more detailed questions on sexual health. The aim of the study is to find out whether sexual health difficulties can be screened by factors included in the MDHAQ-S for persons with RA. This study explores the relation between factors included in the MDHAQ-S and the Sexual Health Questionnaire (QSH) using a mixed methods design combining quantitative and qualitative data. The MDHAQ-S covers sexual health issues, not only by using the question on sexual health, but also on other factors included in the questionnaire such as increased pain, fatigue, depression, anxiety, physical capacity, level of physiccal activity and body weight. To explore decreased sexual arousal, decreased sexual satisfaction and decreased sexual well-being, in-depth interviews must be held with persons with RA, either using a sexual health questionnaire or in a clinical interview.

  • 3449. Arfvidsson, Gustav
    et al.
    Odén, Emilie
    Företagsanalytikers användning av fortlevnadsvarningar vid kreditbedömning i bank2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    During recent times a discussion has emerged on how the auditors assess and formulate the going concern warnings in the audit report. The going concern warnings concept is used to inform if doubts have been found relating towards a company’s ability to operate. Earlier research in this area has had as a starting point to illustrate and quantify the outcome of the going concern warnings, which have shown deviation where reliability should be questioned. The use of going concern warnings should be highlighted since the main purpose of the annual report is to provide stakeholders with meaningful and useful information. The purpose of the study was to explain how business analysts use the annual report and if going concern warnings is of importance when conducting a credit assessment. The starting point of the study has therefore been to try to explain how business analysts in banking use going concern warnings for credit assessments. The investigation has its theoretical basis in the decision usefulness perspective where the properties of the annual report and going concern warnings are explained and then linked to the empirical data collected through interviews. The study found that going concern warnings are not useful as a basis for decision on credit assessments. It was found that other aids were instead used to achieve secure credit assessments.

  • 3450. Arfvidsson, J.
    et al.
    Lindgren, Owe
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.
    Wiberg, P.
    Luleå tekniska universitet.
    The development of a moisure sorption model to predict moisture within solid wood based on non-destructive moisture gradient measurements using CT-scanning and digital ...1997In: International Conference on Wood-Water Relations, 16 - 17 June 1997, Copenhagen, Denmark: [COST Action E8, Mechanical Performance of Wood and Wood Products] / [ed] Preben Hoffmeyer, Copenhagen: Technical University of Denmark , 1997Conference paper (Refereed)
66676869707172 3401 - 3450 of 64181
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