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1694 Uppsatser om Natural frequency - Sida 58 av 113

Utvärdering av konsekvenserna för nätanslutning av vindkraftparker i Sverige vid införandet av nätkoden Requirements for Generators

Grid codes are becoming more demanding on power generating units due to the factthat the complexity of the power grid is increasing. The penetration of wind powerhas grown over the last years and it is clear that wind farms need to be addressedwith the same type of grid codes as conventional generation units. There is howeveran undeniable difference between the technology in conventional synchronousgeneration units, and the asynchronous generation units in wind farms.This thesis has reviewed the current grid code in Sweden and compared it to the newcode proposed by ENTSO-E, ?the Requirements for Generators?, in the aspect ofwind farms with an installed power of 30 MW or more. The comparison has beencomplemented by an analysis of how wind farms of two different technologies(Doubly fed induction generators and full power converters) can meet therequirements and technical proposals have been given on how to be able to meetcompliance with the new grid codes.The Requirements for Generators contains many non-exhaustive and optionalrequirements, because of this it has been difficult to, at this stage, exactly point outthe technical impact on the grid connection of future wind farms in Sweden.

Min onkel : Film blir bok

The Sand Catcher                                                       The thesis project The Sand Catcher investigates the encounter between permanent structures and an ever-changing landscape. The migrating sand dune Råbjerg Mile in northern Denmark is 40 meters high and moves more than 15 meters every year. By introducing a solid structure on the site, the fast movement of the sand dune is emphasised and thereby our view of time and space.Through intuitively building models with varied openings and densities I investigated how architectural elements react with sand. From these experiments a series of spatial features and effects were found, generated from the meeting with the sand.The Sand Catcher is a solid and permanent structure. The sand is the liquid element that generates new spaces, circulations and experiences.

Demokrati vid sidan av kärnan : En studie av folkbibliotekens programverksamheter utifrån ett demokratiperspektiv

In this master thesis, I investigate four Public Librarys´ program activities. The purpose is to explore what the library program activities contribute to as a part of a well functioning democracy. The theoretical points, I have brought from political science. I assume three different ideals of democracy; electoral democracy, participation democracy and deliberative democracy. All have different views on what can be characterized by a well-functioning democracy.My empirical material consists of library program guides, the libraries´ target documents and interviews with staff at the libraries who work with or have overall responsibility for program activities in their respective libraries.

Lycksabäcken, ett riksintresse med komplext deglaciationsförlopp : Presentation av ett möjligt scenario över deglaciationen i området

The area of Lycksabäcken northwest of Lycksele is a national interest of natural conservationbecause of its geological values with many unique landforms. Many of these landforms indicatethat the deglaciation process in the area was very complex. However, the deglaciation process inthe area has not previously been fully understood. The aim is to add to the knowledge of theevents that took place during the last deglaciation. To do this, the glaciofluvial landforms in thearea were mapped by studying aerial photographs with a Wild Aviopreter and a five-day fieldinventory of key areas for the interpretation.

Effekter av fysisk aktivitet på psykisk ohälsa hos unga kvinnor

Among young adults and especially women, psychological issues are common phenomena in the society such as depression, anxiety and stress. Research has shown that physical activity can be a complement for anti-depressant medication. The aim of this review is to examine previous research to find out how physical activity can provide positive effects on overall mood state in particular young women's psychological health. The results of this review is that there are support in the literature of young women that physical activity may enhance mood in studies of depression and anxiety symptoms and small support for the effects on reducing stress. Physical activity with both high intensity and low intensity has shown to have positive effects on depression and anxiety, but the physical activity has to be regular for long-term effects.

Skapandet av ett fredligt samhälle. Vad kan vi göra? : En studie av gymnasieelevers uppfattning om skolans och deras egen roll i skapandet av en fredligare värld

The aim of the study is to examine what upper secondary school students think that they themselves and their school can do to create a peaceful society. The study combine qualitative and quantitative methods based on questionnaires distributed among 328 students in three high schools in Sweden. The survey is a combination of multiple choice and open questions. For the analysis of quantitative responses the computer program SPSS was used producing frequency tables and response rate schemes. To analyze the questionnaire's qualitative part a narrative analysis method was used.

Riskbaserat provtagningsprogram för mikroorganismer i Gäddviks vattentäkt

Risk-based sampling program of microorganisms in the water source in northern SwedenAfter several disease outbreaks caused by parasites in the drinking water during the last years, it is more essential than ever to insure that the water supply companies have enough barriers to counteract the presence of microorganisms in the outgoing water. It is also discussed whether climate changes such as increased precipitation can have a connection to the increased cases of parasites in water sources. The water source at Gäddvik is Luleå municipality?s largest and provides drinking water to 64 500 of Luleå?s 74 000 inhabitants. The investigation of microorganisms in the water source, especially in the Lule River has not been as prioritized as the sampling of chemical parameters.

Framgångsrikt strategiarbete : ett arbete om visioner och strategier inom Region Gotland

The usage of visions and strategies is something that helps an organisation to create an imaginary scenario and guide them of how to realize these goals. During the years of 2006-2008 Region Gotland presented a document that was supposed to show the region's visions. The theoretical framework of this thesis is based on the stakeholder theory, Balanced Scorecard (BSC) and Management Control Systems Package (MCS). Personal interviews were conducted within the organisation Region Gotland, with individuals whom are directly linked to the visions and strategies of the organisation. The purpose of this study is to clarify the concepts of vision and strategy, and what their impact is on the organisation's work on the operation level.

Att vara anhörig eller anhörigvårdare

The purpose of this essay is to describe and analyze experiences of how the daily rounds and a persons role is changing when you go from being a family member to being a family member as well as being a kinship carer.Essential questions at issue was:- Which feelings are associated to the roll as kinship carer?- What are the motivations for the relative/family member to become a kinship carer?- What is the change of the role like before and after the disease.Six persons have been interviewed on the subject and symbolic interactionism and role theory has been our theoretical perspective. The essay has been related to the ideas of Meads on social interaction and to Goffmans theatre theorem.The result of the essay showed that feelings and motivations as regards to the daily rounds and the role of the kinship carer were individual, where similarities and differences occurred. When ones partner, parent or child got a disease/functional disability it generated in some changes regarding their daily rounds and it led to altering of roles. To assume a role was a natural result and often happened when a relative/family member got a disease or an injury..

Bortom det kroppsliga : Prostitution som martyrskap i europeisk film

Here I study some European films from the late 1950?s and the early 1960?s by directors like Fellini, Visconti, Pasolini and Godard. By comparing them with different sociological studies on the subject of female prostitution I try to find out if these films are interested in the actual situation of the prostitute, or in their own image of the phenomenon. Is she an object used for sex or just an sex object? Is she positively or negatively pictured? With realism or as a stereotype? Which aspects of her situation is shown and which ones are concealed? What is the view on the men who actually use her services?It seems natural that different types of films, with different types of prostitutes, illustrates different aspects of what prostitution might be.

Patienters upplevelse av Basal Kroppskännedom efter avslutad behandling : En kvalitativ intervjustudie speglad ur socialkognitiv teori

Introduction: Basic Body Awereness Therapy (BBAT) is a treatment developed to treat different kinds of psychiatric diagnoses, but also to prevent the emergence of any other unhealthy conditions. The treatment is aimed to increase the body control and conscious breathing but also requires mental awareness.Aim: The aim of this study is to, based on social cognitive theory, describe patients' experiences of BBAT performed as group therapy.Method: The study design was qualitative with an inductive approach. Five people were interviewed after a BBAT group treatment in primary care. The data was collected by individual interviews with semi-structured questions and the interviews were analysed by qualitative content analysis.Result/Conclusion: The participants experienced increased body awareness and implemented BBAT strategies even though the treatment frequency was insufficient. BBAT was described as helpful used to regulate intensity level, stress management and facilitate breathing.

Ta på era "hållbar utvecklingsglasögon"! : Ett idéhäfte som kan hjälpa pedagoger att arbeta mer med hållbar utveckling i förskolan

Natural and environmental issues are everyday parts in preschool but when educators shall consciously work with sustainable development they tend to stop at recycling and what is necessary to be done for achieving the Grön Flagg-certification. I have been observing various preschools and noticed that sustainable development is flawed, often because of the teachers lack of interest, knowledge and in some cases both. Out of this grew an idea of making a project that could help the teachers see how the work with the subject in a fun and educational way can become a part of the preschools everyday routine. I made a tutorial booklet with basic facts and activities relating to sustainable development and the three questions in my report were how much knowledge and interest the teachers initially have, if the tutorial booklet could help the teachers to produce new knowledge and interest for the topic and if it turned out to be easier for them to provide educational activities within the subject. There were three departments that participated in my survey and the methodology of collecting data was an anonymous survey with the teachers' own comments in response.

EGEN ZON - Rumsgestaltning för barn nio till tolv år på Stadsbiblioteket i Halmstad

Spatial design for children nine to twelve years old at the Halmstad City Library. An investigation about the specific needs of the target group and how the child department can be designed to stimulate their experience of visiting the library. The aim was to create a spatial concept from the children?s ideas that inspires to playfulness and lust to read at the library. A more personal goal was to collaborate with an external part to prepare for my future role as a designer within child culture.

Val av liggplats och väderskydd hos dikor vid utedrift vintertid

If you keep cattle in a herd outside all year round on big varying grounds, their possibilityto perform their natural behaviour increases. This way of keeping cattle requires that youprovide them with their other needs, like shelter and a dry and clean resting place.According to the animal welfare authority´s regulations on livestock farming, only animalsthat are suited to stay outside during the cold season are allowed to be kept outside. Theyshould also have access to a shelter or another building that gives them protection from theweather and wind and provides a dry and clean resting place.Research has shown that as long as cattle do not get exposed to precipitation and wind theywill manage low temperature well. Some of the things that will affect how well the animalshandle different climates are the isolation ability of the fur, the animals´ body size and thefeed intake. A dry lying place that is both insulating and moisture absorbent is also of greatimportance.

Produktionsstyrning av cylinderbricka : För Atlas Copco, Tierp.

The component workshop at Atlas Copco inTierp intends to reduce the costs inorder to increase their competitiveness.This thesis examines how the productionmanagement around cylinder washersshould be managed in a way that meetsthe customer needs. The customer to thecylinder washer is Atlas Copcos assemblydepartment in Tierp.The purpose of this thesis is to providean alternative way of managing theproduction. A chapter of theory is addedto give the reader an insight ofdifferent types of production managementsystems as well as the underlyingknowledge needed to get a better readingexperience. An introduction of kanbancan in theory help Atlas Copco in thedirection they strive. It should beclear how the purpose of this thesisaffects the cost for the componentworkshop and also how it relates to thecurrent production.

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