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2182 Uppsatser om Hydropower reservoirs; dam safety; erosion protection; waves; simulation; MIKE 21 Spectral Wave - Sida 5 av 146

Säkerhetsorganisationen på svenska traditionsfartyg

This report is a study of Swedish traditional ships and their safety organization. The focus is on how the non-profit organizations that operate the traditional ships can adapt to current regulations in the best way. Initially a background on traditional ships, their organization and regulations that regulates them will be presented.The study is focused on which parts that can be more important in the safety organizations for traditional ships. The questions also includes if a non-profit organization might affect the safety and how the role as designated person should be handled in these organizations. Furthermore the study addresses how a non-profit organization that operates traditional ships might improve their safety organization.The information is gathered by interviews with persons that work with safety, controls safety organizations or is active in organizations that operate traditional ships.

Quartzene i gips : Densitet och hållfasthet

A substation must be properly protected against lightning and other external effects to the equipment in the station or staff, for that we use relay protection. They should also protect against internal errors which may occur as ground faults. There are different types of protection relays, but most common are overcurrent-, distance-, residual current- and differential protection.The purpose of this thesis was to deepen our knowledge of relay protection and to use the theoretical knowledge we got from the university studies in the work process. In the process we discovered which parameters were the most essential and calculated these for all relay protections on the substation. We also carry out a comparison between two brands of relay protection, ABB and Alstom.During our work we will test and simulate the over-current relays in a program called NEPLAN, the program will also calculate the fault currents.

Kunskap om dental erosion hos en grupp fotbollsspelare

Introduktion: Erosionsskador är ett växande problem bland barn, ungdomar och unga vuxna. Dental erosion har en multifaktoriell etiologi som består av endogena och exogena orsaker. Att erosionsskador på tänderna ökar kan bero på den höga konsumtionen av sura drycker bland barn, ungdomar och unga vuxna. Personer som idrottar kan löpa risk för dental erosion på grund av frekvent intag av sura sport/energidrycker men även till följd av påverkat salivflöde. Få studier har undersökt fotbollsspelares kunskap om dental erosion och dess konsumtion av sport/energidryck.Syfte: Att studera kunskapen om erosionsskador bland en grupp fotbollsspelande kvinnor och män.Frågeställningar: Vilken kunskap har fotbollsspelande kvinnor om erosionsskador? Vilken kunskap har fotbollsspelande män om erosionsskador? Vilken konsumtion har fotbollsspelarna av energi/sportdryck?Metod: Studien är en kvantitativ, empirisk, tvärsnittsstudie.Resultat: Totalt deltog 44 personer i studien, 29 kvinnor och 15 män.

Robotiserad produktionsanpassad magnetmontering för vågkraftverk

This thesis work includes studies and simulation how magnetization of the translator in a linear generator for wave power can be automated. The translator is the moving component in the generator that is "dressed" with permanent magnets. The translator is magnetized with rectangle-shaped permanent magnets that are today's strongest permanent magnet type of neodymium-iron-boron (NdFeB).Eight equivalent metal sheets are mounted around the translator. The plates have milled tracks where 106 permanent magnets per sheet are mounted. Today the assembling of the magnets is done by hand, which is a very tedious and time-consuming work.  This project presents investigations about the automation of the translator magnetization theoretically and simulation results are preformed in ABB's robot simulation software RobotStudio. Even robot-held tool was designed that enables the robot to be able to magnetize the translator in a simple manner.  The investment cost is roughly 1.5 million SEK. With an economic life-time of five years, the investment costs are estimated to 24000 SEK / month.  According to the calculations, this project is very motivated to implement, as it provides savings up to 17 000 SEK per translator which is 10.2 million SEK assuming that the robot cell is operating at full speed the whole year.According to this thesis work the result is a 4x9 meter cell with two industrial robots of the type ABB IRB6650S.The cycle time to magnetize one translator was calculated to about 10 hours.This prototype of project can possibly be implemented in a full-scale production line and performed according to the calculations and simulations presented in the report. Further work is suggested to improve the tool.Lyssna .

Den psykosociala arbetsmiljöregleringen : Med inriktning på arbetsrelaterad stress

This essay focus on work related stress and psychosocial enviroment in working life. The purpose of this study is to present a detailed description of regulation of the the Occupational Safety and Health Act and investigate how well employees are being protected by the law.I will also explain with the help of statistic which employees that most often suffer from work related stress and the results is discussed from a gender perspective.Work related phycosocial health is a big issue in todays workplaces, and people who suffers from stress are supposed to be protecteded by the the Occupational Safety and Health Act, but is that really the truth? The Occupational Safety and Health Act is a frame law, meaning the law is general and needs binding regulations to define the rules, and there is no such act about work related stress at the moment. No employer has ever been convicted for work related stress. At the same time the Occupational Safety and Health Act explains that the employer has a responsibility to take arrangement to prevent mental illness in working life.It?s mostly women who suffer from work related stress.

Trygghetens dilemma : trygghetsskapande arbete i det offentliga rummet

This graduate thesis is engaged with perceived safety and "safe making" design in public places. Despite the fact that we have never been as safe, questions of safety get more attention than ever in today?s society. Public demands for safer and more secure environments and low levels of experienced feelings of safety indicate problems in society that can shrink people's usage of public places as well as their quality of life. Through methodical exaggeration of danger and legislation of laws, the state creates a situation that in different respect work to overprotect the citizens, who are not unlikely to experience feelings of being unsafe at the same time that the actual safety is to big. An expansion of protection against fear can unlike what was first intended decrease the experience of safety.

Intendenturpersonalens syn på säkerhetsarbetet ombord på ett passagerarfartyg i färjetrafik

Today, the catering personnel are an essential part of the safety organization on board Swedish passenger vessels in ferry services. Their responsibilities for the safety on board have increased in connection with the changes in regulations made on the shipping industry. These changes have been mostly related to human factors and structural leadership in the last 25 years.A well-functioning safety organization requires competence and commitment from every individual. Previous researches on Swedish passenger ferries concerning the safety organization have raised issues regarding the catering personnel?s perception of the safety on board.

Transporttidsmodellering vid provpumpning i heterogen jord : spårämnesförsök i en isälvsavlagring

When protection zones for wells are delineated, it is important to acquire good knowledge about possible travel time from different points in the catchment area to the well. Often, simple analytical methods are used for estimating travel times and the assumption is made that the hydraulic conductivity is relatively homogenous within the aquifer. Nevertheless, many aquifers are strongly heterogeneous which may lead to differences between estimates and actual travel times. As a part of the process to develop improved methods for delineating protection zones for groundwater supply wells, a tracer experiment was performed in a glaciofluvial esker formation in Järlåsa. On the basis of the experiment, a numerical flow model was created for the test site.The purpose of this master?s thesis was to apply the flow model to an aquifer where the hydraulic conductivity shows great variability and should be described by a stochastic distribution.

Simulering, ett alternativ inom produktionsplanering?

Typically, when Faurecia in Torsås are planning a new assembly line, one of the steps is to build a full-scale model of the line in card board, a form of mock-up planning. Faurecia has shown interest in finding an alternative methodology. The purpose was to explore the possibility of replacing today's cardboard based mock-up planning with models in a digital simulation environment.The purpose of the thesis has been to answer some of these complex questions; What are the benefits of using a simulation tool? In what way can we use it? If we choose to use a simulation tool, in what way does it affect our way of planning an assembly line? What are the advantages and disadvantages? Are there any economical and social aspects?Our results made us realize that a digital simulation tool does not replace the card board. On the other hand simulation could be used as a complement.

Glaset i Centrum : En fallstudie på New Wave Group

Seen in many trends and studies, consumers of today feel a growing desire to experience the uniqueness in products and services. This is forcing companies be more innovative and creative in their marketing, in order to distinguish and differentiate themselves and their products/services. We believe that creating a top-to-bottom experience strategy is one way that a company can succeed in this.The purpose of this thesis is to analyze and clarify how a business can reinforce their product experience through a complete experience strategy. In order to demonstrate this we have made a case-study research for the New Wave Group, advising them on how they can place blown glass art at the heart of the town of Kosta.The authors have used qualitative methods and an abductive approach. Four interviews have been completed with executives from the New Wave Group, including the project manager, hotel manager, head of the Kosta Boda smeltery and head of guides and visitors at Kosta museum.

Simulering av filtrerade skärmfärger

This report present a working model for simulation of what happens to colors displayed on screens when they are observed through optical filters. The results of the model can be used to visually, on one screen, simulate another screen with an applied optical filter. The model can also produce CIE color difference values for the simulated screen colors. The model is data driven and requires spectral measurements for at least the screen to be simulated and the physical filters that will be used. The model is divided into three separate modules or steps where each of the modules can be easily replaced by alternative implementations or solutions.

Flödesmätning i vattenkraftverk : Studie av alternativa mätmetoder

Flow measurement is one of the greatest challenges in order to calculate efficiency in hydropower. Most hydropower plants in Sweden use differential pressure methods for flow measurement. These methods are dependent on constant conditions in the waterways. A change in these conditions, like turbine improvements, prevents differential pressure methods to verify efficiency improvements. Since efficiency improvements can?t be verified by one measurement system, another method, which isn?t affected by changing conditions, can be used.

Kulturkonflikter : En komparativ studie av synen på ras och klass i Spike Lees Do The Right Thing & Mike Leighs Hemligheter och lögner

I två analyser av filmerna; Do The Right Thing av Spike Lee (1989) och Hemligheter och lögner av Mike Leigh (1996), har jag undersökt  hur och varför samhällsproblematik  som berör klass- och rasfrågan presenteras på film utifrån hur cultural studies teoretiskt förhåller sig till problematiska relationer mellan kulturella identiteter i USA och Storbritannien. Jag kom fram till att identifikationen av den kulturella identiteten var olika i respektive länder; USA och Storbritannien. I USA var rastillhörigheten utgångspunkten för den kulturella identiteten och i Storbritannien var det klasstillhörigheten utgångspunkten för den kulturella identiteten..

Erosionsskador hos barn och ungdomar

Aim: The aim of this study was to examine and explain the various methods available to rate the erosion damage, and on which teeth and tooth surfaces of erosion damage mostly occurs in children and adolescents.Method: A literature review was conducted, based on 15 scientific articles that have been reviewed, evaluated and analyzed. Articles were searched for in the database PubMed.Result: Six of the articles used the TWI (tooth wear index), which is an index to diagnose the tooth wear in the primary and permanent dentition. Eight articles used other indices as they considered that the TWI was not sufficiently developed to register the degree of tooth wear on some teeth. Tooth wear in the primary dentition occurs most often in the canines and incisors. Tooth wear in the permanent dentition was found in the literature to be mostly occurring on the occlusal / incisal surfaces of all teeth and tooth surfaces.LyssnaConclusion: There is no common index in the articles but many of them use the TWI.

Operationssjuksköterskors beskrivningar av att arbeta med WHO:s checklista för säkerhet vid operationer

Background:In Sweden there are several thousand surgical procedures performed every day. The treatment is expected to be efficient, profitable and safe. Despite that, complications occur in 3-16 % of the surgical procedures. To prevent this, WHO has developed a surgical safety checklist containing safety issues to give the surgery team an opportunity to a last control that everything has been properly done. The profession of the surgical nurse focuses mainly on patient safety especially regarding hygiene and sterility.Aim: The aim of the study was to investigate and describe the perceptions of the perioperative nurses regarding WHO: s surgical safety checklist.Method:To test the suitability of the method a pilot study was performed where tree operating room nurses were interviewed and the data was analyzed using qualitative content analysis.Results: Four categories emerged; Increased patient safety, enhanced team spirit, good planning, stronger professional role.Discussion: The result from the study showed positive perceptions regarding the surgical safety checklist, a fact known from earlier research.Conclusion: The results of the pilot study showed that surgical nurses had good support in their work when the surgical safety checklist was used..

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