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  • Glorieux, Emile
    et al.
    University West, Department of Engineering Science, Division of Production System.
    Franciosa, Pasquale
    Warwick Manufacturing Group, University of Warwick, CV4 7AL Coventry, UK.
    Ceglarek, Darek
    Warwick Manufacturing Group, University of Warwick, CV4 7AL Coventry, UK.
    End-effector design optimisation and multi-robot motion planning for handling compliant parts2017In: Structural and multidisciplinary optimization (Print), ISSN 1615-147X, E-ISSN 1615-1488, 1-14 p.Article in journal (Refereed)
    Abstract [en]

    The deformation of compliant parts during material handling is a critical issue that can significantly affect the productivity and the parts' dimensional quality. There are multiple relevant aspects to consider when designing end-effectors to handle compliant parts, e.g. motion planning, holding force, part deformations, collisions, etc. This paper focuses on multi-robot material handling systems where the end-effector designs influence the coordination of the robots to prevent that these collide in the shared workspace. A multi-disciplinary methodology for end-effector design optimisation and multi-robot motion planning for material handling of compliant parts is proposed. The novelty is the co-adaptive optimisation of the end-effectors' structure with the robot motion planning to obtain the highest productivity and to avoid excessive part deformations. Based on FEA, the dynamic deformations of the parts are modelled in order to consider these during the collision avoidance between the handled parts and obstacles. The proposed methodology is evaluated for a case study that considers the multi-robot material handling of sheet metal parts in a multi-stage tandem press line. The results show that a substantial improvement in productivity can be achieved (up to 1.9%). These also demonstrate the need and contribution of the proposed methodology.

  • Samuelsson, Marcus
    et al.
    University West, Department of Social and Behavioural Studies, Division for Educational Science and Languages.
    Arvola, Mattias
    Linköpings universitet.
    Nordvall, Mathias
    Stenliden, Linnea
    Linköpings universitet.
    Simuleringsbaserad undervisning som ett kompletterande inslag i lärarutbildningen vid Linköpings universitet2017Report (Other academic)
  • Thorsen, Cecilia
    et al.
    University West, Department of Social and Behavioural Studies, Division for Educational Science and Languages.
    Henry, Alastair
    University West, Department of Social and Behavioural Studies, Division for Educational Science and Languages.
    Cliffordson, Christina
    University West, Department of Health Sciences, Section for health promotion and care sciences.
    The case of a missing person? The current L2 self and the L2Motivational Self SystemIn: International Journal of Bilingual Education and Bilingualism, ISSN 1367-0050, E-ISSN 1747-7522Article in journal (Refereed)
    Abstract [en]

    In Dörnyei's (2009a) theorizing, motivation is conceptualized to be generated by discomfort associated with the learner's experience of a discrepancy between their current L2 self, and their ideal L2 self. However, in the L2 Motivational Self System, this discrepancy is not operationalized. A questionnaire containing measures of current L2 selves was administered to two cohorts of students learning English in Sweden, one in grade 7, and one in grade 9. Using structural equation modelling, results revealed that the discrepancy between the ideal L2 self and the current L2 selfwas greater for the grade 7 cohort. So too was the impact on a criterion variable measuring intended effort. Arguments for the operationalization of the selfdiscrepancy process in research designs are put forward. In studies tracking changes over time, it is suggested that the inclusion of a variable measuring the current L2self could provide important insights into self-discrepancy trajectories, facilitate the investigation of motivational dynamics, and bring greater sensitivity to intervention design.

  • Bernling, Sigrid
    et al.
    University West, Department of Health Sciences, Section for nursing - graduate level.
    Kucukcelik, Nadire
    University West, Department of Health Sciences, Section for nursing - graduate level.
    Medias konstruktioner av flyktingar och hur dessa kan påverka distriktssköterskor i deras möte med flyktingar2017Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In 2015, the increased number of refugees arriving in Sweden was covered in media. Public health nurses may in their encounter with immigrants be influenced by discourses arising from medial constructions of refugees. The aim of this study was to examine mass medial constructions of and discourses about refugees, since preconceptions can influence district nurses in encounters with these persons. It is a matter of importance to discuss how this can manifest itself, in order to make public health nurses encounters with refugees as well-functioning as possible. Person-centred care has been uses as a theoretical frame of reference in this study. A qualitative approach was chosen. The methods used were corpus analysis and discourse analysis.  Data was collected from three daily newspapers: Dagens Nyheter, Sydsvenskan and Svenska Dagbladet, published in September, October and November 2015. During this time the concept refugee occurred in 4022 articles. The result shows that refugees in media are contoured as a homogenous group. Four discourses based on thirteen constructions were identified. The four discourses were a crisis discourse, a helplessness discourse, a political discourse, and an economical discourse. From the discourses, it is assumed that public health nurses reading of medial texts about refugees influences their view, and therefore their care, of refugees. Hence, it is important to illuminate the constructions of refugees in media

  • Lyrhem, Lisa
    et al.
    University West, Department of Social and Behavioural Studies, Division for Educational Science and Languages.
    Rundberg, Sophie
    University West, Department of Social and Behavioural Studies, Division for Educational Science and Languages.
    Kommunikation i matematikklassrummet: En studie om lärares samtal och frågornas betydelse för att utveckla elevers matematiska kunnande i årskurs 2-32017Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Bakgrund: Flera forskare (Chapin, O´Connor & Andersson, 2009; Mercer, 2008; Partanen, 2007; Riesbeck, 2008; Samuelsson & Forslund Frykedal, 2014; Taflin, 2007) nämner att det är genom samtal som tänkande och lärande kan utvecklas, då vi under samtalet förmedlar, förstår och klargör våra egna och andras tankar. Enligt Mercer (2008) är språket en central del för elevers lärande och utveckling, men att det inte tillförs tillräckligt med undervisningsmöjligheter där elever får uttrycka sig verbalt vilket har lett till sämre skolresultat. Således finns det anledning att undersöka detta i undervisningverksamheten, då vår studie kan bidra till en nyansering av det beforskade området. Syfte: Syftet med studien är att beskriva och analysera kommunikationen mellan lärare och elever vid matematisk problemlösning och vilka konsekvenser det kan få i undervisningen.  Metod: För att kunna besvara våra frågeställningar har vi valt observation och intervju som datainsalmlingsmetoder. Val av lärare genomfördes med åtanke att personen skulle ha deltagit i en kompetensutveckling i matematik och vara en verksam matematiklärare. Dessa kriterier stämde in på vår observerade och intervjuade lärare. Läraren var verksam i en åldersintegrerad klass i årskurs två och tre. Vi observerade klassen under tre tillfällen och efter sista observationen genomfördes en intervju med läraren. Resultat: I studien framkom att läraren hade som avsikt att ställa fler divergenta frågor (frågor som öppnar upp för samtalsmöjligheter) men att resultatet visade sig vara det motsatta, som var fler ställda konvergenta frågor (frågor som sluter samtalsmöjligheter). Vi beräknade antalet ställda divergenta och konvergenta frågor ur respektive observerad lektion för att sedan analysera utfallet. I vår tolkning av resultatet har vi lyft både för- och nackdelar med lärarens kommunikationssätt.

  • Hamatuli, Cliff
    University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing.
    Skräddad mikrostruktur av gadolinium zirkonat baserade värmebarriärbeläggningar som utsätts för termisk cyklisk utmattning2017Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Yttria Stabilized Zirconia (YSZ) is the standard ceramic top coat material used for TBC application. Above 1200°C, issues such as CMAS (Calcium Magnesium Alumino Silicates) infiltration susceptibility, phase instability and high sintering rates limits its long durability. Therefore, new materials which can overcome these challenges without compromising the other requirements for TBCs are highly desirable. Gadolinium zirconate is one such material which has shown promising results for CMAS infiltration resistance. In this work, a relatively new TBC processing route, suspension plasma spray (SPS) has been employed to deposit gadolinium zirconate based TBCs. The primary aim of this study was to deposit two different coating systems (layered and composite) of gadolinium zirconate and YSZ composition using SPS technique and evaluate their thermal cyclic fatigue life performance. The layered system was a triple layered TBC with YSZ as the base layer, relatively porous GZ as the intermediate layer and dense GZ as the top layer. The blended TBC system comprised of a thin YSZ layer, an intermediate GZ+YSZ thick layer and dense GZ top layer. In the thermal cyclic fatigue test at 1100°C and 1200°C, it was observed that blended TBC had a lower thermal cyclic life than the layered TBC. It was shown that SPS is a promising technique to deposit columnar microstructure TBCs. 

  • Krishna Chalavadi, Sai
    University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing.
    Parameter identification of GISSMO damage model for DOCOL 900M high strength steel alloy: Usage of a general damage model coupled with material modeling in LS-DYNA for Advanced high strength steel crashworthiness simulations2017Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
  • Johannesson, Stefan
    et al.
    University West, Department of Engineering Science, Division of Mathematics, Computer and Surveying Engineering.
    Olsson, Katarina
    University West, Department of Engineering Science, Division of Mathematics, Computer and Surveying Engineering.
    Bristfälliga grundkartor och fastighetsutredningar: En studie om hur stort problemet är och följderna av dem2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    According to PBL 5 chap 8 § it is required to have at least one basemap during the creation of a local plan. However, it is possible to overlook this if it is deemed to be unnecessary.

    The idea for this study was formed after a meeting at the beginning of this year when a group of people learned that the available basemaps were severely flawed and that they did not live up to the standard thus making them unsuited as a foundation for local plans, roadplans and railroadplans. Furthermore, it turned out that property investigations were all too rare. The meeting revealed a couple of cases where things had gone wrong and the consequences that had occurred due to this proved to be delays that lasted for approximately one to two years.

    The study aims to explore different reasons as to if and why there is a problem with the basemaps and property investigations. It also aims to find out what kind of consequences that could possibly arise due to this problem.

    This study is primarily based on interviews with experienced project managers who work at a private housing development companies but also municipal officials who have experience in planning new residences for a more broad study. Furthermore, this study will be based on their personal opinions and experiences regarding the chosen problem which means that not every single professional beyond this study will have the same answers.

    The end result shows that the chosen problem is not considered to be a great problem for the interviewees and that they so far have not come across any consequences caused by flawed basemaps or property investigations. All project managers have however experienced shortcomings, particularly heights, which is a detail that has higher uncertainty in quality. They have also noted that the quality differs between urban areas and countryside areas. The problem is well known amongst the interviewees which means that they are able to fix a problem at an early stage and that reduces the risk for major consequences.

  • Edlund, Tina
    University West, Department of Social and Behavioural Studies, Division for Educational Science and Languages.
    Walt Whitman's Leaves of Grass: A Poetic Paradox in Search of American Individualism2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The influence of Ralph Waldo Emerson on Walt Whitman's Leaves of Grass is well known; equally well known are the traces of the Transcendentalist philosophy concerning nature. But Whitman expands upon both these influences as he developed his own individualism based on solidarity rather than independence. Whitman's take on individualism permeates all parts of Leaves of Grass, including the aesthetics. The aesthetics were up for much contemporary debate as the book seemed to lack traditional poetic structure and form. However, this was not the case as this study shows. In light of the sociopolitical climate in America when Leaves of Grass was first published, there was a demand for change from within literary circles. This need to create a new American spirit was called for by Emerson among others. Leaves of Grass was the response. In his book of poetry, Whitman develops a new American spirit with the intention of encouraging the American people to seek individual solitude; although, in this innovative individualism there is a paradox revealed: one must connect with each other and find social belonging at the same time as being self-reliant to have true liberating individualism. Also, the aesthetics in Leaves of Grass does show traces of traditional structure. However, the form is altered to represent Whitman's new innovative individualism. Thus, this study shows that the influences of Emerson and the transcendentalists are evident, but Whitman develops his own individualism in support of America, and in this lies a paradox. Whitman's first-person "I" becomes a representation of this paradox in Whitman's individualism, as well as a symbol for his solidarity towards his people: the united American people.

  • Tamil Alagan, Nageswaran
    University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing.
    Textured insert for improved heat extraction in combination with high-pressure cooling in turning of superalloys2017Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Heat generated in a machining process is a common and critical obstacle faced in today's machining industries. The heat generated in the cutting zone has a direct negative influence on the tool life which, in turn contributes to increase the manufacturing costs. Especially, in machining of Heat Resistant Super Alloys, HRSA this is a very limiting factor. HRSA are capable of retaining their mechanical strength and hardness at elevated temperatures. This property is advantageous in the application in e.g. aero-engines but also a disadvantage, since it also lowers the machinability significantly. This work is an attempt to improve the heat transfer from the cutting zone, which would lead to an increase in the tool life. To achieve this goal, the cutting tool has been modified to create an improved interface between the coolant and tool in the high-temperature areas. Two generations of inserts have been designed and investigated. Firstly, an insert with surface texture features has been created with the purpose of increasing the available surface area for heat dissipation: First generation, Gen I. Secondly, a GenII was designed as a further improvement of Gen I. Here, several channel features on the rake face were added, reaching out from the contact zone to the near proximity of the cutting edge. This with the purpose of improving access of the coolant closer to the cutting edge. The experiments were conducted in facing operations of Alloy 718 with uncoated round carbide inserts. All experiments were carried out with high-pressure coolant assistance, with a pressure of 16 MPa on the rake face and 8 MPa on the flankface, respectively.The two generations of inserts, Gen I and Gen II, were experimentally evaluated by tool wear analysis in comparison with a regular insert. The results shows that the tool life increased significantly for the Gen I insert, compared to a catastrophic failure of the regular insert at the same conditions. Regarding the Gen II insert,an increase in tool life by approximately 30 to 40 percent compared to Gen I insert was observed.

  • Riyadh Gafory, Ali
    et al.
    University West, Department of Economics and IT, Divison of Informatics.
    Öller, Fredrik
    University West, Department of Economics and IT, Divison of Informatics.
    Införandet av Neo på NÄL: Personalens upplevelser av en digital artefakt som stöd för resursplaneringen på neonatalavdelningen2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The adoption of information technology in health care has become a major part of the Swedish health care sector. It has been shown that processes can be streamlined, the quality of care can increase and it helps to provide a clearer overview for the staff. On the other hand, the adoption of a software or system is a time-consuming and complex process that must go through several different instances before it can be implemented. It applies to both large-scale systems and small-scale department-specific software. The study examines what characterizes the introduction of a small-scale software for the neonatal department at Norra Älvsborg Länssjukhus (NÄL). The evaluation model Technology Acceptance Model (TAM) evaluates how the staff experience the use of such software to support their resource planning process. The study shows that it is a timeconsuming process to introduce even a small software and it can be hard to motivate management to allocate resources for something that only supports a single department. The study also shows that with a willingness to change a work process and with a positive attitude towards digitization, a small-scale software can be perceived as a support for a work process.

  • Börjesson, Erik
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Beredning av landsbygdsnät i Hassle, Mariestad2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The thesis deals with how preparation work is accomplished in rural networks, by field work, landowner contact, contracts and permit applications. The described preparation work is the basis for the implementation of the project from Ellevio AB.  The reconstruction is performed in order to secure the voltage and get a more weatherproofed network, but also to get rejuvenation of the network. The preparation work is done for PSN Kraftkonsult Eldistribution AB in Vedum and performed using their working methods. The preparation work is performed in the area of Hassle north of the town Mariestad. The project is divided into two interim stages. Stage one is called Hassle sub-station – Källtorp and the second one is Fåleberg – Nolhassle. These two stages are parts of one large reconstruction of the distribution network in the area by Ellevio AB in the near time. Due to the fact that a major rebuilding project of the E20 in the affected area the projector’s intended rout for the cable had to be changed. And it became 1100 m further. The result of the preparation work includes two new 10/04 kV substations, one new cable cabinet, 5850 meters of high-voltage cable and 500 meters low-voltage cable. All the cables will be placed in the ground and for the most they will be plowed down. Substations and cable cabinets will be placed strategically to create the strongest network as possible and for good availability for future maintenance.

  • Augustsson, Per
    et al.
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Mansori, Farsad
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Skapande av dynamiskt modellnät för analys av lasters beteenden vid nätstörningar2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This bachelor’s thesis is carried out on behalf of Vattenfall Eldistribution AB in Trollhättan. This work aims to make modelling of power grids for simulations, of load behaviour during perturbations, in PSS/E more effective. Modelling will be made more effective by means of programming, using the programming language Python, and also by allowing certain assumptions to be made about the grid. The idea for this work arose from a certain case, during which Vattenfall was tasked with investigating why voltage levels near an industry would not recover after a short circuit, on the transmission line feeding the industry, was cleared. Investigations demanded simulations of the disturbance to be carried out in PSS/E, to describe what had happened. To enable simulation and to make it representative, the grid and its components must be adequately modelled. Svenska kraftnät has the data nessecary for such modelling, but it is inaccessible due to confidentiality. Due to the data being confidential extensive work with modelling was nessecary. Early simulations were based on the idea that some parts of the grid can be modelled using only simplified models, and with typical, or default, values. This thesis uses that hypothesis in the programming code. The low voltage after these perturbations were caused by motors, more specifically induction motors, drawing high currents from the grid during reacceleration when the voltage starts to recover after the perturbation. This high, and mostly reactive, current causes significant voltage drops across the lines and transformers, in turn causing other motors to draw more current and further lowering voltage. The programming code, called a script, developed during this work allows the user to quickly create dynamic model data to use when conducting simulations of the dynamic behaviour of this type of loads. Modelling of the generators is done quickly thanks to the assumption that generators are located far enough away that they are barely affected by the studied disturbance. They are, for this reason, modelled using typical values. Through a graphical interface, the user then select which loads to model. For each load model, the distribution across different types of loads is specified by the user. Finally, protection relays are modelled to enable current monitoring. The script has been tested by comparisons to a reference network model created by Vattenfall. The comparisons show minor deviation between the script and the reference. This could be because the script uses default values and models less components than the reference.

  • Darefelt, Kristina
    et al.
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Vidén, Filip
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Projekthantering hos Vattenfall Eldistribution AB jämfört med andra nätbolag2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis work has been carried out on behalf of Vattenfall Eldistribution AB. The purpose of the work was to evaluate the improvement potential of the design process in the optimization department, with the aim of being able to provide suggestions for improvement of the process which ultimately can lead to a more efficient project flow. It is perceived in the department that there are non-value-creating activities at work that should be reviewed. In order to gain a deeper understanding of the process, the group has performed a network design according to the working process. The purpose of the work was to increase the electrical quality of the abonnee fields. Upon completion of the project, electricity quality could be increased for all customers in the area. For all subscribers except for one were the agreed limit values was within Vattenfall's guidelines. To make a comparison with other ways of working, a study inspired by benchmarking has been conducted at different network companies. Based on the analysis, data has been collected through qualitative interviews. The interviews have been recorded and transcribed. The material has since been sorted and analyzed using a qualitative data matrix. Following the interviews conducted, it was found that the working methods of the various companies largely resemble each other. However, some differences in the performance and view of economic calculations and key ratios could be observed. Differences can also be seen in the size of initiated projects. All participants in the benchmarking study stated that they overall are satisfied with the work process. Analysis of the collected material showed that for some aspects of the work process there is an improvement potential. After completion of work, the conclusion could be drawn that there are some elements in the process that contribute to non-value creation. This has been shown in the form of activities in which any form of forced interruption occurs in the process. Improving or eliminating these steps should provide a more efficient workflow. The management of calculations and key ratios is one of these factors. Proposals were made to clarify the information about the purpose and use of these for employees. Even the shortcomings found in the design tools can contribute to a slower process flow. For these, no proposals for improvement could have been provided, but it was still considered important to emphasize these inadequacies.  

  • Göransson, Oskar
    et al.
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Tessin, Tobias
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Utredning och projektering av smarta elbilsladdstationer2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    An expansive use of electric vehicles and therefore charging stations will eventually lead to a much greater load on the electrical grid. One way to avoid overloads is to fit charging stations with load balancing systems that can adjust every charging station’s power output in relation to the rest of the local substations load. Since cars usually remain parked for long periods of time the load balancer can ensure that the cars only charge with a high amount of power when the general load is low, and thereby the local electrical grid doesn’t risk overloading in consequence of the increased total energy consumption.  This paper includes a market review of the three largest load balancing system suppliers on the Swedish market to clarify what separates the different systems and whether they are applicable in different areas. There will also be a design, carried out through ÅF, of a scenario of 50 charging stations controlled by load balancing systems in the parking lot of a company. In conjunction with this there will be an investigation of the ability to charge 50 of the employee's electric cars during an 8-hour working day with an assumed average commute of 50 km. Which charging stations and load balancing systems that are to be used in the design are determined by those which are best suited to the circumstances of the company. The design has been done in accordance with Swedish standards and with the help of information and software provided by ÅF. The companies that participated in the market investigation were found through Power Circle. According to the customer's requirements, the charging stations needed a power output of 22 kW, and since variations of the power consumption of the plant are present, the load balancing system must be able to measure the load of a transformer to adjust all charging stations power output accordingly. The charging stations and systems that were considered most suitable for the situation were Eldon's. The design included cable sizing, cable layout maps, cost calculations and transformer calculations. Each car needed only about 10 kWh to reach a fully charged state, and the available power of the transformer was sufficient to complete the charging of up to 182 electric cars during the workday. Thus, the cost of both cables and charging stations could have been much lower if the requirement of 22 kW power output was not set.

  • Nielsen, Jessika
    et al.
    University West, Department of Social and Behavioural Studies, Division for Educational Science and Languages.
    Sjöblom, Pernilla
    University West, Department of Social and Behavioural Studies, Division for Educational Science and Languages.
    Sagan som ett tematiskt arbetssätt I förskolan: Simsalabim, I sagans värld kan allt hända2017Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syfte Syftet med denna studie är att undersöka hur sagan används i ett tematiskt arbetssätt i förskolan. Fokus i undersökningen riktar sig mot hur pedagogerna arbetar och deras reflektioner kring de sätt de arbetar på.   Metod Det är en kvalitativ studie med observationer och intervjuer som metod. Två pedagoger observerades under deras gestaltande aktiviteter, dessa pedagoger intervjuades även vid ett senare tillfälle. Även en mediapedagog som tidigare hade arbetat med samma arbetssätt intervjuades.  Resultat Den gemensamma inramningen i att arbeta med samma saga skapar en förståelse för innehållet och förutsättningar för samarbete mellan avdelningar och andra förskolor med samma arbetssätt. Estetiken skapar möjligheter för kommunikation och förstärker sambandet mellan sagan och verkligheten. Pedagogernas individuella gestaltning och kunskaper bidrar till att skapa karaktärer som inspirerar och engagerar barn. Genom pedagogernas gestaltande av sagans karaktärer skapas en speciell relation mellan barn och pedagog. Det finns en förståelse hos barnen för att pedagogen är både sig själv och sin karaktär. Miljön kan skapas både utomhus och inomhus i samspel mellan pedagoger och barn. Miljön används för att förstärka och förankra sagans innehåll. Den fördjupande kunskapsdimensionen bidrar till ett fördjupat och riktat lärande.

  • Ronthy, Marika
    University West, Department of Social and Behavioural Studies, Division of Psychology, Pedagogy and Sociology.
    Ledarintelligens utifrån chefs och ledarrollen2017Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of the present study was to validate an instrument called Leader Intelligence Questionnaire (LQ-test) based on the theory of leader intelligence out of being a manager and a leader. Leader intelligence is a concept created by Ronthy observing skills within the rational, emotional and spiritual intelligence with the main focus on skills within the latter two which also is a human leadership. The questionnaire of leader intelligence is created by Ronthy and has 71 item, and the majority are from Larsson et al. (2003). The instrument has three scales to study all three intelligences. The scale for the rational intelligence studies the role as a manager and the emotional and spiritual intelligence studies the role as a leader. A second aim was to examine the gender distribution among managers and leaders. The participants in the study were 307 leaders (68% women). Furthermore, the participants also responded how much time they spent per month on tasks related to the management role as well as the leadership role. According to the leader intelligence theory the manager should spend more of his/her time in the leader role leading him / herself as well as others and less time in the managerial role managing administrative tasks. The result shows that 20% perceive themselves as managers with the emphasis on administrative tasks and 80% perceive themselves as leaders with the emphasis on a human leadership. When analysing the time spent on various tasks divided within the three different scales the study showed that 72% of the time was spent on managerial tasks and 28% on leader tasks as coaching, personal development and reflection. The study showed no significant differences between men and women. The relational aspect of leadership is being empathized more and more in today´s organizations which will be clarified in this study.

  • Sörensson, Emil
    et al.
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Vilhelmsson, Joakim
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Undersökning av resistansvärden i brytare och frånskiljare2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Today, maintenance is performed at predetermined time intervals. Eldistribution wants to investigate the possibility of performing a preventive and more proactive maintenance instead based on the state of the asset. Therefore, Eldistribution is developing an Anläggningshälsoindex (AHI). With this, Eldistribution wants to optimize maintenance planning. An AHI consists of a number of parameters collected when inspecting the asset. The resistance in circuit breakers and disconnectors can be one of these parameters. Circuit breakers are used in the high voltage grid to break all kinds of fault currents that may occur. They can also be used to make changes in the grid during work. Disconnector is a device used to get a clear visual breakpoint. Due to its construction it can’t break currents but it can break voltage. The thesis has been carried out both as theoretical study of circuit breakers and disconnectors together with a field study during testing before operation of circuit breakers. A number of intreerviews with experts in the field has also been carried out. The thesis shows that there is a possibility of using resistance in circuit breakers as one of the preventive maintenance parameters. However, in order to be able to use the resistance of the circuit breakers as one of the parameters, it is necessary to produce clear limit values.

  • Eriksson, Kevin
    et al.
    University West, Department of Engineering Science, Division of Mathematics, Computer and Surveying Engineering.
    Lunde, Jesper
    University West, Department of Engineering Science, Division of Mathematics, Computer and Surveying Engineering.
    Teknikstudie över olika laddningstekniker för elfordon2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Electric vehicles are on a strong rise with increasing sales and larger infrastructure every year. For a fast-growing industry like electric vehicles, it is interesting to look at how they are charged as this affects all owners of electric vehicles. The commercial technologies for electric vehicle charging today are conductive and have been standardized. However, several different standards exist, partly competing with each other. The report describes the major standards of IEC, CCS, CHAdeMO and GB/T, in addition to these, there is also the car manufacturer Tesla with its own standard. The thesis takes a closer look at some development projects to see in which directions the technology is developing. Among other things, conductive transmission via rail in or on the road and transmission by wires above the road, but also upgrading of existing standards. Inductive charging projects are further investigated with static inductive charging stations and dynamic inductive charging while driving. The thesis investigates dynamic inductive charging in deeper detail. There is a lot of research and projects going on, but there are still many problems to solve in order to commercialize the technology. The advantage of inductive charging is that it can be wireless and when the vehicle is charged while driving, fewer stops are required to charge. The technology, on the other hand, has some efficiency issues that can vary greatly depending on how the vehicle is aligned towards the transfer coil. Communication to pay for charging, among other things, is still early in the development, as a very high communication speed is required when charging during travel. The writers view is that the major development and expansion will occur in inductive transmission as well as upgrading of the existing conductive standards. Standardization of the upcoming technologies is considered important in order to avoid creating many incompatible technologies on the roads. Work on standardization of inductive transmission is in progress but is not yet complete.

  • Wallentin, Jenny
    University West, Department of Social and Behavioural Studies, Division of Social Work and Social Pedagogy.
    Den strävsamma resan på längtans väg: En narrativ studie om unga vuxna som uppbär aktivitetsersättning på grund av nedsatt arbetsförmåga2017Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The UN Convention on the Rights of Persons with Disabilities, CRPD, is the principle of accessibility in the physical, communicative and informative environment of society for people with disabilities. As a person with disabilities you should have the same opportunity to participate in all the different arenas of society. One of these arenas marks the labor market, where the Swedish political intention is a labor market open to all, regardless of their ability to function. One step in promoting entry into the labor market for young adults with disabilities is the Swedish Social Insurance Benefit Disability benefits due to reduced work capability. Evidence shows that young adults with disability benefits are an exposed social group with lower disposable income than the rest of the population, the risk of ill health and exclusion from the labor market, thus endangering life-long poverty.        The aim of the study is to illustrate and bring about the young adults' own voices about their experiences of living with disability benefits as main source of income. The method used is a narrative method with social constructionist ideals. Central concepts according to the purpose of the study are participation, agency and social recognition.  The results show that young adults experience different levels of participation in society, depending on the availability of social arenas such as economic conditions, employment and communicative and informative accessibility. The limited disposable economy leads to difficulties in living on equal terms and participate as equals in society.

  • Bhoje, Sourabh
    University West, Department of Engineering Science, Research Enviroment Production Technology West.
    Termisk cykling provuppställning konstruktion och provning av TBCs för dieselmotorapplikation2017Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Thermal barrier coatings (TBCs) thermally insulate the substrate from high temperature exposure. This work attempted to simulate real engine thermal cyclic conditions by designing a test method to evaluate the thermal cyclic fatigue (TCF) performance of different coatings applied inside exhaust manifold of a diesel engine. The coatings investigated in this work comprised of two plasmas-sprayed TBCs (conventional 8YSZ and nanostructured 8YSZ) and one bond coat (NiCoCrAlY). Additionally, these coatings were exposed to isothermal testing and their oxidation behavior was evaluated.   All the coatings along with only substrate were exposed to temperature around 525°C for 150 cycles in thermal cyclic testing carried out on Scania’s heavy-duty diesel engine. For isothermal testing, all coatings along with only substrate material were exposed to 650°C and 750°C for 168 hours respectively. Microstructural analysis by SEM/EDS was carried out to compare the microstructural evolution of the tested coatings with the as sprayed TBCs. In the case of thermal cyclic test, all coatings showed no failure and no TGO growth up to 150 cycles. In the EDS analysis for isothermally tested coatings, oxidation of the substrate at bond coat- substrate interface instead of TGO growth was observed. Bond coat showed lowest oxide layer thickness at 650°C and 750°C followed by conventional YSZ and then nanostructured YSZ. But, conventional YSZ showed microcracks in top coat near top coat- bond coat interface after isothermal testing. Thermal cyclic and isothermal exposure test results showed that bond coated substrate and nanostructured YSZ have the potential to be implemented inside the real manifold.   

  • Axelsson, Daniel
    et al.
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Olsson, Daniel
    University West, Department of Engineering Science, Division of Computer, Electrical and Surveying Engineering.
    Utvärdering av olika dynamiska lastmodeller i PSS/E2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This bachelor’s thesis has been performed for Vattenfall Eldistribution AB. The purpose of this work has been to create understanding of dynamic load models and clarify how they function and how they can be used. The aim has been to perform simulations on short circuits and motor starts for two different load models. A part of the work is also to describe the basic principles of the induction motor to create a connection between simulation and theory. The theory of the induction motor contains information about the electric induction that is the basic principle of the induction machine. It also contains the correlations between torque, speed, current and voltage and also a description of the equivalent electric circuit. The IMD program is a program connected to PSS/E and it has been used to create the model for the induction motor that has been used for the simulations. The simulations have been based on instructions from the advisor and instructions from the PSS/E manuals. Simulations have been run with two of the built-in load models in PSS/E, one general load model and one model for induction motors. Short circuits have been simulated on both models and motor starts on the induction motor model. Short circuits have been simulated with two different fault durations 0.15 and 0.4 seconds. Motor starts have been simulated with two different transformer sizes 1.5 and 3.0 MVA and three different values of the inertia time constant 0.7, 1.0 and 1.5 MWs/MVA. At short circuit the fault duration causes larger currents and longer recovery times for both load models. At motor start the size of the transformer, in MVA, and the inertia time constant affects the motors starting time. Larger transformer means shorter time because of lesser drop in voltage. A larger inertia time constant means longer time.  If only the size of the voltage drop is of interest and not the course of the event, the motors start admittance can be used instead.

  • Wang, Yueyue
    University West, Department of Engineering Science, Division of Production System.
    Theoretical experiment of GISSMO failure model for Advanced High Strength Steel2017Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    When developing an electric vehicle, it is essential to evaluate the deformation in and around the battery box for different crash scenarios, and it is necessary to develop a more advanced model that would take into account all the stress modes. Thanks to the excellent properties of Advanced High Strength Steel (AHSS) combine with high strength for more safety and weight reduction for less exhaust emission, AHSS is more and more commonly used in automobile industry. The material employed in this project is DOCOL 900M and it is a martensitic steel with yield strength higher than 700MPa.  The focus of the current work is to describe the experimental setup for the GISSMO model used in LS-DYNA. A number of experimental methods and theories have been reviewed. Different geometries of the test specimens under different stress triaxialities have been discussed. The study also compares the accuracy and robustness of each of the testing methods and setups. The effect of anisotropy of materials on the mechanical properties was studied. Some summaries about how to reduce errors in the experiment under the conditions of low costing and high efficiency have been discussed. According to the stress-strain response of ductile materials, the parameters of plasticity model can be calibrated. The material can be implemented in finite element software to calibrate the parameters of damage and the prediction of material failure can be achieved. The experiment and simulation are always good to be used together in the research.