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  • Mustakangas, Sanna
    et al.
    University West, Department of Engineering Science, Division of Mathematics, Computer and Surveying Engineering.
    Tallheden, Jenny
    University West, Department of Engineering Science, Division of Mathematics, Computer and Surveying Engineering.
    Upplåtelse av allmän plats för enskilt ändamål2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Municipalities have the plan monopoly which means that they have the exclusive right to produce and adopt detailed plans. A detailed development plan regulates how land and water areas should be used and granted. The plan regulates which land that should constitute a land for public space and an area for building sites. Public space is for example land as parks, nature, squares or roads that are made for the public's needs. Public spaces are usually not allowed to be leased for private interests as they are made for public interests. The use of the site's must be reported in the map for the detailed plan, with associated plan regulations that both are legally conclusive. The public spaces should, among other things, also be available for emergency vehicles. Property formations should compliance with the current detailed plan. Minor deviations from the detailed plan can be made if the deviations are compatible with the purpose of the plan, according to the Real Property Formation Act 3:2. It has been questioned if it´s allowed to lease public spaces for private interests. Certain municipalities mean that the purpose with the public spaces disappears if it is leased for a private interest, but other municipalities think that there is a need. The selected authorities' reasons for the leases are minor deviation from the detailed plan, that the purpose of the detailed plan is not counteracted and that the public place's accessibility to the public is not affected that much. This thesis clear that land which is leased temporary regulates in the Order Act of Sweden and is leased with a police license. Permanent leases regulate in the Code of Land Laws forms part of the Statute Book of Sweden as well as in the Property Formation Act and make the leases with a use agreement or an easement. In this thesis public spaces definition that specifies in the Planning and Building Act and the corresponding definition in the Order Act of Sweden. The purpose of the thesis is to describe the legal situation concerning private leases on public places. The study is supposed to describe how four municipalities and two land survey authorities deal with the issue. The study also intends to clarify the underlying motives that the selected authorities have for their decisions. There are several rights to apply for private interests in public spaces. The authors of this thesis have defined to only investigate whether it is possible to grant land for private interests through easements or rights of user. After completing the study, we can conclude that there are shared opinions about whether the legislation should be clarified or changed. The authors of this study can see that the issue of granting public space should be dealt with early in the planning process. To start setting the issue up early, the authorities can avoid a time-consuming and expensive change of plan. We also can see that there is a need to change or clarify the legislation.

  • Hedlund, Elin
    University West, School of Business, Economics and IT, Division of Media and Design.
    (Ur)kunden har alltid rätt: En studie om plagiat och användandet av plagiatkontrollsystem vid ett svenskt lärosäte2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this study was to better understand how the universities in Sweden work to prevent plagiarism, how they use plagiarism detection tools and what knowledge the students have or wish to have about plagiarism. This was studied through interviews with teachers and administration staff from one smaller university in Sweden together with a questionnaire for students attending any university in Sweden. The study shows that the information about plagiarism can be clearer from teachers according to the students, to prevent plagiarism as far as possible. It also shows that the university is already working to improve the information so that the students in a better way can understand, but it is hard to know how to give the information and what information that the students need. The examined university are using the system Urkund as a plagiarism detection tool and the study shows that teachers in general are satisfied with the system and how they use it. However, some teachers see an opportunity to use the detection tool in their teaching practises but need more knowledge of the system to do so efficiently. The students reportedly know what plagiarism means according to the study, but they do not have a deeper knowledge about it which they want from their universities, especially how the school is handling plagiarism cases and how the plagiarism detection tool works. The study concludes with recommendations for the universities to improve their work against plagiarism.

  • Olsson, Niklas
    et al.
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Selberg, Christian
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Numerical simulation and experimental validation of a manufactured wing profile2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The background for this thesis originates from a study of the flow characteristics for an airfoil of the type NACA0018. The aim for this thesis was to evaluate how the characteristics of the flow over the NACA0018 profile depend on surface roughness. Airfoils were manufactured in Aluminum by Computer Numerical Control-milling and in polylactide polymer using a 3D-printer, where some of the profile surfaces were postprocessed with sandpaper in various grain sizes. The surface roughness of the profiles was evaluated in a 3D optical profilometer using white light interferometry from Filmetrics. By that technique 3D surface plots were created. The manufactured airfoils were tested in a wind tunnel where the achieved data was made dimensionless for comparative purposes. The computational fluid dynamics simulations were performed in Ansys Fluent and compared against the wind tunnel data as well as with the data from a previously made study at htw saar. The results from the wind tunnel tests show that the surface roughness has an effect on the flow characteristic of the airfoil, where different angles of stall were observed in the comparison. The difference for the dimensionless numbers coefficient of lift and drag show that the manufactured aluminum airfoil performs better compared to the 3D-Printed airfoil in this study. It has a higher performance mean value for both of these coefficients in a span of angles between 0 and 30 degrees. When compared, the results from the simulations and wind tunnel experiments do match in some cases, where the dimensionless coefficients and stall angle coheres. Further studies based on this report are recommended, where small geometric changes to the profile could be tested and validated.

  • Tunney, Ruth
    University West, School of Business, Economics and IT, Division of Media and Design.
    Interaktivt Innehåll och Konvergenskultur: En diskursiv fallstudie av Black Mirror: Bandersnatch2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    As illustrated by the Netflix special Bandersnatch as a cultural phenomenon, the purpose of this study was to analyze how "new" storytelling forms exist in today's convergence culture. This was done by a discursive case study about TV-critics' reception of Bandersnatch, along with smaller comparative discourses covering both relatively traditional film and TV organizations within the media industry, as well as an online forum. Therefore, it was demonstrated how the convergence culture expanded the expression of interactive content. Themes inspired by the reviews included the categorization of Bandersnatch as a media product. The technological aspects of interactive elements were furthermore used in the analysis of the result. Moreover, this was discussed in relation to theories of design and convergence culture. Finally, the results of the study indicated that Netflix's Bandersnatch was compared to both analogue and digital media products. The film's technological aspects were considered to detract from the storytelling experience of a movie, but rather it generated the type of entertainment found in a video game. An insecurity of the future of film as an artform and a dilution of traditional ownership roles also emerged, as the viewer's control continued to be discussed, not only in relation to Bandersnatch, but also to the overall interactive and participatory digital media landscape.

  • Fredriksson, Thorgrim
    et al.
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Pettersson, Jonas
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Elkvalitetspåverkan vid utlokaliserad felbortkoppling i radiella 40 kV distributionsnät2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This bachelor’s thesis investigates the changes in electrical power quality that can arise from relocating switchgear and protection relays, from the power-feeding station, for a power grid with radial operation. The report highlights the potential problems with a prolonged faultclearance time in the power grid. The report uses existing regulations and a previously completed bachelor’s thesis, in which a substantial socioeconomic benefit was concluded, as a starting point for the study. The purpose of this bachelor’s thesis is to determine if unlawful voltage sags can appear in the power grid following a relocation of the switchgear and protection relay. There is also an interest in investigating if the earlier determined socioeconomic benefits remain if the previously unconsidered cost following a voltage sag is included. There is also included in the scope of the bachelor’s thesis to describe a basic method for evaluation of the expected cost of a voltage sag. By observing the nature of occurring voltage sags following simulations in PSS/E for proper power grids several illustrations over the magnitude and disconnection event were produced. The resulting disconnection event was then used in combination with estimated valuation factors to estimate the expected cost following a voltage sag. Which leads to that the socioeconomic benefits can be estimated by contemplating the change in cost following a forced outage in relation to the voltage sag cost. With regards to the occurrence of unlawful voltage sags in the examined power grids the bachelor’s thesis concludes that there is no risk for the appearance of such. The thesis also demonstrates that an overall socioeconomical benefit follows the use of any of the presented relay protection methods. Even though this benefit does not present itself in all the radials for the observed power grids following a relocation. In these cases, a deeper analysis is required to guarantee a positive outcome. The thesis contains an uncertainty with regards to the presented benefits following the use of non-established valuation factors. Following this the thesis should be viewed as a proof of concept and not as a in depth case study for the evaluated power grids. Despite these uncertainties the authors advocates, following the result of the thesis, for the use of relocated current measuring protection relays as a standard method when using relocated switchgear and protection relay. Furthermore, the authors also advocates for the activation of an instantaneous disconnection step, in the power-feeding station, in order to minimize the fault-clearance time of the most critical voltage sags.

  • Hendberg, Jessica
    et al.
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Lundgren, Emma
    University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    Planerade arbetens påverkan på SAIDI: analys baserad på Vattenfall Eldistribution AB:s nät2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis is made on behalf of Vattenfall Eldistribution AB and was conducted at their office in Trollhättan. The purpose of the project was initially to reveal that the way to the 2025‘s SAIDI-goal, probably will deviate from the original goal. This because of the many investments that are made in the power grid. These investments often lead to many switching schedules which often, for the customers, mean a planned interruption of the power supply. What is to be investigated is if there are any disturbances which are related to a planned interruption. Namely, if there was a secondary fault caused by the planned work, that caused a customer interruption that lasted longer than three minutes aside from the planned interruption time. According to Swedish Energy Markets Inspectorate, the concept of power quality divides into two different parameters; continuity of supply and voltage quality. This work will only focus on the continuity of supply, more particularly the interruptions which last more than three minutes. To enable comparison between electrical companies there are a few interruption indicators which for example are SAIDI and SAIFI. SAIDI is the quota of the total customer interruption time and the total customer quantity. The result that has been shown is not comparable to the historical SAIDI-results which Vattenfall Eldistribution AB presents, since different variations of SAIDI is being used. The result shows that a meaningful impact is to be received because of secondary faults occurring with some of the switching done in the grid, due to planned work. These faults could for example be rooted in a disconnector failing, flaws in the documentation that lead to manoeuvres of the wrong device, or simply because of the human factor.