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  • Adamson, Göran
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre. De Montfort University, UK.
    A Novel Method for Adaptive Control of Manufacturing Equipment in Cloud Environments2018Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The ability to adaptively control manufacturing equipment, both in local and distributed environments, is becoming increasingly more important for many manufacturing companies.

    One important reason for this is that manufacturing companies are facing increasing levels of changes, variations and uncertainty, caused by both internal and external factors, which can negatively impact their performance. Frequently changing consumer requirements and market demands usually lead to variations in manufacturing quantities, product design and shorter product life-cycles. Variations in manufacturing capability and functionality, such as equipment breakdowns, missing/worn/broken tools and delays, also contribute to a high level of uncertainty. The result is unpredictable manufacturing system performance, with an increased number of unforeseen events occurring in these systems. Events which are difficult for traditional planning and control systems to satisfactorily manage.

    For manufacturing scenarios such as these, the use of real-time manufacturing information and intelligence is necessary to enable manufacturing activities to be performed according to actual manufacturing conditions and requirements, and not according to a pre-determined process plan. Therefore, there is a need for an event-driven control approach to facilitate adaptive decision-making and dynamic control capabilities.

    Another reason driving the move for adaptive control of manufacturing equipment is the trend of increasing globalization, which forces manufacturing industry to focus on more cost-effective manufacturing systems and collaboration within global supply chains and manufacturing networks. Cloud Manufacturing is evolving as a new manufacturing paradigm to match this trend, enabling the mutually advantageous sharing of resources, knowledge and information between distributed companies and manufacturing units. One of the crucial objectives for Cloud Manufacturing is the coordinated planning, control and execution of discrete manufacturing operations in collaborative and networked environments. Therefore, there is also a need that such an event-driven control approach supports the control of distributed manufacturing equipment.

    The aim of this research study is to define and verify a novel and comprehensive method for adaptive control of manufacturing equipment in cloud environments.

    The presented research follows the Design Science Research methodology. From a review of research literature, problems regarding adaptive manufacturing equipment control have been identified. A control approach, building on a structure of event-driven Manufacturing Feature Function Blocks, supported by an Information Framework, has been formulated. The Function Block structure is constructed to generate real-time control instructions, triggered by events from the manufacturing environment. The Information Framework uses the concept of Ontologies and The Semantic Web to enable description and matching of manufacturing resource capabilities and manufacturing task requests in distributed environments, e.g. within Cloud Manufacturing. The suggested control approach has been designed and instantiated, implemented as prototype systems for both local and distributed manufacturing scenarios, in both real and virtual applications. In these systems, event-driven Assembly Feature Function Blocks for adaptive control of robotic assembly tasks have been used to demonstrate the applicability of the control approach. The utility and performance of these prototype systems have been tested, verified and evaluated for different assembly scenarios.

    The proposed control approach has many promising characteristics for use within both local and distributed environments, such as cloud environments. The biggest advantage compared to traditional control is that the required control is created at run-time according to actual manufacturing conditions.

    The biggest obstacle for being applicable to its full extent is manufacturing equipment controlled by proprietary control systems, with native control languages. To take the full advantage of the IEC Function Block control approach, controllers which can interface, interpret and execute these Function Blocks directly, are necessary.

  • Fathi, Masood
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ghobakhloo, Morteza
    Department of Industrial Engineering, Minab Higher Education Center, University of Hormozgan, Bandar Abbas, Iran / Modern Technology Development and Implementation Research Center, University of Hormozgan, Bandar Abbas, Iran.
    Syberfeldt, Anna
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    An Interpretive Structural Modeling of Teamwork Training in Higher Education2019In: Education Sciences, E-ISSN 2227-7102, Vol. 9, no 1, p. 1-20Article in journal (Refereed)
    Abstract [en]

    In the past decade, the importance of teamwork training in higher education and employers’ enthusiasm for recruiting team players have been widely discussed in the literature. Yet, the process through which effective teamwork training is developed in a higher education setting has not yet been properly discussed. The present study aims to map the precedence relationships among the key determinants of teamwork training effectiveness and explain the process through which an effective teamwork training program can be developed. The study first conducted an extensive review of the literature to highlight the key determinants of effective teamwork training. Next, the study benefitted from an interpretive structural modeling technique and captured the opinions of a group of teamwork training experts to further map the interrelationships among the potential determinants that were identified. By listing the key determinants of effective teamwork training, mapping their interrelationships, and identifying their driving and dependence power, the present study is expected to help practitioners and academicians through providing a detailed understanding of the process through which an effective teamwork training program can be developed in a higher education context.

  • Werner, Elin
    University of Skövde, School of Engineering Science.
    MATERIALANALYS & OPTIMERING AV HYDRAULISKA HÖGTRYCKSKOPPLINGAR MED HJÄLP AV SIMULERINGAR2018Independent thesis Basic level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Optimizing the burst pressure with finite element analysis is done on the FEM ½” coupling at Parker Hannifin AB. The critical components which is the ball cage, guide and plug housing are in focus. A more accurate material analysis is done to make a more real-based data of the material in the coupling.  

    After being in contact with the company that performs the hardening of the component, the entire plug housing is assumed to be hardened. For more information about material data, static pressure test is performed on a coupling. The measured strains from the tests are compared to the strains in the simulations. The tensile strength and hardness coefficient on the guide and ball cage can be adjusted slightly from the tests, but the result has several uncertainties. 

    The number of balls can be reduced, numbers of balls between 15 and 12 are investigated at request from the company. Analysis of how hardening of the material for the guide is done and hardening of the surface for the plug housing. 

    The smallest deformation occurs when hardening the guide. The ball cage clearly demonstrated minor deformations and stresses as the number of balls is reduced from 15 to 12 balls in the coupling. To reduce the burst pressure on the plug housing, it is recommended to harden the surface with a 27 % harder surface than the current. Due to estimated values of material data on hardened surface, more information is needed to determine the thickness needed on the surface of the hardening when having 12 balls in the coupling. 

  • Public defence: 2019-10-10 13:05 Skövde
    Hollis Daniel, Naib
    University of Skövde, School of Informatics. Naib.Hollis.Daniel@gmail.com.
    TILLÄMPAR STUDENTER INFORMERAT SAMTYCKE VID BESÖK AV E-HANDEL SIDOR2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Denna undersökning handlar om att identifiera vad för faktorer som påverkar högskolestudenters beslut vid godkännande av cookies vid besök av e-handel. Undersökningen utfördes genom mixed metod forskningsmetod. Metoderna skedde i form av kvantitativ och kvalitativ i form av enkätundersökning samt intervjuer. Syftet med undersökningen var att förstå vilka faktorer som påverkar studenters godkännande av cookies när de besöker e-handel. Motiven till denna undersökning är att allt fler människor spenderar en stor del av sin tid på en växande bransch där de ständigt bemöts av popuppnotifikationer av cookies som kräver deras godkännande och medför att per automatik att många godkänner utan grund på informerat samtycke. Detta är något som behöver undersökas för att identifiera vad för faktorer som påverkar högskolestudenter informerade samtyckes godkännande av cookies.

  • Mercan, Hasan Mert
    University of Skövde, School of Engineering Science.
    Integrated augmented reality and product lifecycle management framework for operator support optimization and improvement of reporting during the manufacturing operation2018Independent thesis Advanced level (degree of Master (One Year)), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Nowadays, production environment became more and more competitive due to innovative improvements and applications in industrial systems. Manufacturers aim to implement technological solutions into their production systems from the design phase until the product’s end of life. This approach provides several benefits to manufacturers such as; reduced cost, increased productivity, reduced time-to-market etc. Augmented Reality (AR) is one of the most popular technologies which provides innovative solution to manufacturers. There is a variety of use of AR applications in manufacturing world such as; assemble, training, maintenance, recycling etc. On the other hand, the product data andits traceability became more and more important within supply chain. In order to improve their competitiveness on the market, manufacturers started to search for solutions which helps to improve production practices in terms of cost and time. PLM solutions have provided a better understanding to use of product data and improved the production systems. This project aims to develop a framework which integrates the AR and PLM context with the purpose of optimization of the support given to the operator and reporting of the manufacturing operations. An AR –PLM Framework has been developed and a demonstrator has been implemented as a proof of the concept in this project.

  • Ahlandsberg, Sanne
    et al.
    University of Skövde, School of Health and Education.
    Millner, Emmy
    University of Skövde, School of Health and Education.
    När hjärtat plötsligt slutar slå: En kvalitativ litteraturöversikt av patienters upplevelse av att överleva ett hjärtstopp utanför sjukhus2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Bakgrund: Ett plötsligt hjärtstopp är en av de vanligaste dödsorsakerna i Sverige och cirka 5 000 människor drabbas årligen av ett hjärtstopp utanför sjukhus. Att överleva ett hjärtstopp kan väcka många existentiella frågor och känslor som påverkar både livskvalitet och livsvärld. Sjuksköterskan kan möta patienter som överlevt ett hjärtstopp inom vilken klinisk specialitet som helst. Syfte: Syftet med studien är att beskriva patienters upplevelser av att överleva ett hjärtstopp som skett utanför sjukhuset. Metod: Studien använde sig av en kvalitativ litteraturöversikt som innefattar både kvalitativ och kvantitativ forskning. Resultat: Patienterna upplevde mycket ångest, oro och rädsla efter att de överlevt ett hjärtstopp. Patienterna upplevde att det var nödvändigt med nya rutiner för att kunna gå vidare. Det emotionella och sociala stödet var en viktig del i återhämtningen efter hjärtstoppet. Patienterna upplevde att det var viktigt för dem att få information kring hjärtstoppet och vägen tillbaka till ett sunt liv. Konklusion: Studien kom fram till att patienterna hade ett stort behov av information kring den nya vardagen. Det var viktigt för patienterna att bearbeta sina existentiella frågor och få stöd från sjukvården, familj och vänner. Patienterna önskade att sjuksköterskan hade mer konkret information om patientens tillstånd och vad deras kropp klarade av rent fysiskt.

  • Kjellner, Emma
    et al.
    University of Skövde, School of Health and Education.
    Petersson, Katrin
    University of Skövde, School of Health and Education.
    Människors upplevelser av att leva med bipolär sjukdom: En analys av självbiografier2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Background: Bipolar disorder is a mental illness, the disease is characterized by recurrent depressive and manic periods that affect the experiences of human life and health. The nurse has a valuable role when people with bipolar disorder are in contact with healthcare. To increase understanding of experiences of living with bipolar disorder, more research is needed. Aim: The aim is to illustrate people's experiences of living with bipolar disorder. Method: A qualitative method was used. Narratives in the form of six autobiographies were analyzed, the data has been analyzed based on Dahlborg-Lyckhage's description of analyzing narratives / stories. Result: During the analysis, four themes emerged; The roller coaster of the disease; The eternal mental pain and its consequences; Experiences of close relationships and the importance of support; When diagnosis becomes a fact and health is lacking. Discussion: Bipolar disorder is a mental illness involving both patient and relatives. The experience of living with bipolar disorder is to live with both health and illness, depending on which disease period they are in. Support from care and nurses is perceived often as lacking. Conclusion: People living with bipolar disorder experiences that the symptoms affect the entire life as a person. The nurse has a major impact on the person's mood and experiences.

  • Larsson, Emma
    et al.
    University of Skövde, School of Health and Education.
    Andreasson, Niclas
    University of Skövde, School of Health and Education.
    Återhämtning genom vistelse i naturen: En litteraturöversikt om naturens påverkan på stress2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Background: Stress related ill health is today a common condition that causes personal suffering. Stress is about imbalance between load and recovery. Long-term stress can result in a life situation that gives both mental and physical ill health. For those who work in human-care professions, it is therefore important to be able to recognize stress and its symptoms Aim: To illustrate how people with stress experience visits in nature. Method: The chosen method is a literature review where qualitative and quantitative articles have been studied. Results: Visiting nature contributes to psychological recovery from stress. Stressed people find it easier to get their everyday life together thanks to the recovery they experience through visiting nature. The ability to reflect on ones lifesituation increases through visiting nature and also the power and ambition to take on the future. Also physical recovery is experienced through visiting nature. Experiencing nature through senses as sight, feeling, taste and smell is experienced to have a calming and relaxing impact. Generally, visiting nature contributes to feeling anchored in existence and experiencing feelings like joy and gratitude. Conclusion: The result shows that people suffering from stress experiences recovery through visits in the nature.

  • Green, Richard
    et al.
    University of Skövde, School of Health and Education.
    Zachau, Pernilla
    University of Skövde, School of Health and Education.
    Patienters upplevelser av att leva med hjärtsvikt: En kvalitativ litteraturöversikt2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Background: Heart failure is a common cause of hospitalization in Sweden. Patients need support from health care, current research shows that this support is lacking. The nurse needs more understanding of the patient's world of living in order to relieve his suffering.

    Purpose: The purpose is to illuminate patients' experiences of living with heart failure

    Method: The essay is a literature review where 15 qualitative articles with a patient perspective were analyzed

    Result: Patients experience emotional disorder derived from their symptoms, their meetings with care and their social context. They find hope and meaning in their faith, with their close relatives and in good care. Patients experience that acceptance of their limitations and an adjustment subsequently leads to health.

    Conclusion: The entire life of the patient is affected by heart failure, this requires the nurse to keep in mind and respond to when treating the patients. Heart failure patients need to experience continuity and understanding from the healthcare. Understanding should not only be limited to the patient's symptoms but also the patients need for spirituality. This can be addressed by the nurse being open to having existential conversations with the patient, or by referring to a hospital or similar profession.

  • Nair, Vipul
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Drejing, Karl
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Hemeren, Paul
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Incidental processing of biological motion:: Effects of orientation, local-motion and global-form features2018Conference paper (Refereed)
    Abstract [en]

    Previous studies on biological motion perception indicate that the processing of biological motion is fast and automatic. A segment of these studies has shown that task irrelevant and to-be-ignored biological figures are incidentally processed since they interfere with the main task. However more evidence is needed to understand the role of local-motion and global-form processing mechanisms in incidentally processed biological figures. This study investigates the effects of local-motion and global-form features on incidental processing. Point light walkers (PLW) were used in a flanker paradigm in a direction discrimination task to assess the influence of the flankers. Our results show that upright oriented PLW flankers with global-form features have more influence on visual processing of the central PLW than inverted or scrambled PLW flankers with only local-motion features.

  • Nyman Gomez, Christian
    et al.
    University of Skövde, School of Informatics.
    Berg Marklund, Björn
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    A Game-Based Tool for Cross-Cultural Discussion: Encouraging Cultural Awareness with Board Games2018In: INTERNATIONAL JOURNAL OF SERIOUS GAMES, E-ISSN 2384-8766, Vol. 5, no 4, p. 81-98Article in journal (Refereed)
    Abstract [en]

    This paper studies whether a board game can effectively raise awareness of cultural differences and their impacts on everyday life. Furthermore, the paper compares whether a board game might achieve this goal more efficiently, or differently, than more traditional ‘open discussion’ exercises. To conduct this study, a board game that present players with cultural dilemmas was designed and developed based on a comparative model of individualistic and collectivistic cultures. The game’s ability to generate discussion and engagement with cross-cultural topics was evaluated and compared with traditional discussion exercises in a series of experimental studies conducted in SFI (Swedish For Immigrants) classrooms. A follow-up survey was also conducted to compare long-term effects between the board game and the traditional discussion exercise. Results indicate that the game benefited participants’ discussions and reflections regarding cultural awareness directly after the game session, and that they retained their attitudes and perceptions of cultural awareness better than participants of the non-game exercise.