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8597 Uppsatser om Power quality problems - Sida 8 av 574
Simulering av vindkraftverk och närliggande elnät vid Risholmen i Göteborg i SimPowerSystems
With background in the rapidly growing need to find solutions for sustainable energy production and the increasing interest for wind power, this report was written. With take-off point from the wind power plant Big Glenn, which has been built in the harbour of Gothenburg, a model of the adjacent power grid has been created in Simulink/SimPowerSystems. Parameters for the power grid and its components has been provided by Göteborg Energi Nät, that has also been the supplier of measurement data of produced power, the power need from loads in the vicinity, voltage levels, current values and also the variation of power factor at the wind power plant.The SimPowerSystems model has been used to perform simulations of power flow in the grid. These simulated values have then been compared to the measured values to verify the functionality of the model. Further, the model has been used to perform simulations of a grid fault, which causes a voltage drop.
Livskvalitet 2-7 år efter allogen stamcellstransplantation
This is an empirical cross-sectional study with the aim to examine the patient?s comprehension about their quality of life within two to seven years after their stem-cell transplantation with reference to physical, social, emotional, psychological and functional wellbeing and to investigate if the patient groups have disease specific problems. Differences in quality of life between men and women and also between allogeneic and stem cell transplantation with an unrelated donor (URD) were studied. The measurement Functional Assessment of Cancer Therapy (FACT) and the bone marrow transplant subscale (BMT) is a 49 item, valid and reliable measure that was used. The questionnaire was answered by 43 of 47 patients (91%).There is a significant difference between men and women in physical, social and functional wellbeing.
Livskvalitet och social livssituation hos patienter som genomgått Ö-cellstransplantation
Aim: To investigate the quality of life and the social life situation, with special focus on the consequenses of fear of hypoglycemia (FoH), in Islet transplanted patients.Method: 11 patients were included, four women and seven men, who have been Islet tranplanted at Uppsala University Hospital during the years 2001-2009. Two questionaires, Short Form 36 (SF-36) and the Swedish version Hypoglycemia Fear Survey (Swe-HFS) were used to investigate the quality of life, in relation to fear of hypoglycemia. Also, telephone interviews were conducted to investigate the patients social life situation in relation to FoH, after Islet transplantation and were analysed using content analysis method.Results: The mean value for quality of life was lower than that in the normal population. Three out of ten patients experienced FoH. Three predominant themes were revealed, one theme associated with pre- transplant, was ?Struggle for control of Social Life Situation? and two themes associated with post-transplant, were ?Regain power and controll of Social Life Situation? and ?At Peace with the balance between the Present and the Future?.Conclusion: The patients experienced improved control over social life situation and quality of life in relation to FoH may been improved following islet tranplantation..
Vägar och markanspråk inom vindkraftsparker i Västerbottens län : Hur verkliga mått förhåller sig till vad som uppges i miljökonsekvensbeskrivningar
The purpose of this study was to increase the level of knowledge in the field of Environmental Impact Assessment (EIA) for wind power. The study includes six wind power farms in the County of Västerbotten in northern Sweden. The main questions were: What are the real dimensions of roadways and land claims for both roads and wind power turbines? How do those dimensions correlate with the dimensions stated in the EIA? Are there any differences in values of the dimensions between the wind power farms that are included in this study? The width of the roadways and the land claims for both roads and wind turbines in wind power farms were examined on site. The results from the examinations were compared with the dimensions available in the EIA for each wind power farm.
Bulleremissioner från vertikalaxlade vindkraftverk
Wind power in Sweden is expanding in response to the government's decision that 49% of Sweden's power should originate from renewable energy sources by the year 2020. Problems with noise and sound emissions related to wind turbines are a constant argument against the wind power expansion and this paper means to examine if vertical axis wind turbines might be a viable alternative to the conventional horizontal design for noise sensitive areas. In order to determine factors like difference in frequency, noise propagation and noise emission level, measurements of both horizontal and vertical axis wind turbines have been completed and the data analyzed with MATLAB. It is shown that there is a difference in how the noise from the two types of turbines propagates due to avariation in the frequency spectra of the emitted sound. It is also shown that vertical axis wind turbines generate a lower sound emission with less intensity inthe lower frequencies..
Om relationer och maktstrukturer inom delat ledarskap : Lustfull relation eller obalanserad soppa?
The aim of this study is to create an increased understanding of shared leadership and how it takes shape in the relationship between first-line managers in human service organizations. Shared leadership is seen as a complement to the traditional one-man leadership and briefly means that two managers share the role that usually is held by a single leader. The study has a qualitative approach based on semi-structured interviews with managers in human service organizations. The interviews mention the mangers thoughts and experiences about shared leadership and gain approval in the hermeneutic science field. The study is analyzed based on symbolic interactionism where perspectives from the theoreticians Mead and Goffman are used.
Mätningar och analys av elnätet hos FHP, Basproduktion
This report is a degree project performed at Freudenberg Household Products AB, (FHP). The degree project comprises measurement and analysis of the power net at FHP Basproduction. The content is divided between one theory-part, one document- part with measurements and also conclusions and a list of measures to be taken. During the project the purpose and restriction change from a quality investigation to only concentrate on harmonics and finding the reason why they exist, and also to find a solution to the problem with harmonics. The measurements shows that the power net contains harmonics of different order and intensity.
Det talas om utbrändhet : vilken roll spelar maktstrukturen
In this paper we investigate whether power structures in organizations have an influence in the process that leads to burnout. We analyze if these power structures affect the individual?s health condition toward burnout in a way that leads to disability and subsequent absence from work. In the study, six persons who all have been unable to work due to burnout have been studied through qualitative, semi-structured interviews. The material have been coded with three different themes; leadership and hierarchy, responsibility and delegation of responsibility and performance and loyalty.
Sjuksköterskans uppfattning om livskvalitet
Background Satisfaction of life and wellbeing is shown to be important when the quality of life is to be understood. The nurse has a significant role in the care of the patient and in his/her experience of life. Aim The purpose of this study is to examine the quality of life, from a nurse perspective. Method The text analysis was carried out with qualified attempts, of a book, "Quality of life a challenge for the nurse" (in Swedish) by T. Rustoen, a nurse who also worked as a teacher in Norway.
Simulator för el- och värmeproduktion : påverkan på ekonomi och miljö
In this project a simulator has been developed (in C++) with the purpose of illustrating how changes in environmental regulations, tax levels and other policy measures affect the composition of an energy system. The aim of the project was to investigate how energy companies? investment strategies are affected when changes in economic and environmental conditions occur. A standard scenario has been created based on current Swedish conditions, but the user can create new scenarios and set parameters freely.
The user is tasked with building power plants to supply the city/region with district heating and electricity during a pre-set number of years. When the simulation is finished
the result is graded in the following categories: economy, environment and quality.
To evaluate the simulator three scenarios were created (?early 20th century?, ?reduced environmental control? and ?future?) in addition to the standard scenario and these were compared with each other by examining how a select group of power plants perform under the given conditions.
Vetenskap och makt. En analys av två vetenskapliga paradigms skilda maktlogiker.
This essay analyse the relationships between scientific paradigms and different logics of power in the field of psychiatry, primarily in the fields of attention disorders of children and schizophrenia. In these two fields of psychiatric research and treatment, there exist two scientific paradigms, a biological/neuropsychiatric and a socialpsychological, working from different standpoints regarding questions of ontology, epistemology and theories of value. Drawing from Thomas Kuhns paradigmatic theory of science, and Michel Foucaults concept of power, this essay proposes that different paradigmatic standpoints gives rise to different logics of power. Relying on the concept of power/knowledge and different paradigmatic standpoints, the essay states that the biological/neuropsychiatric paradigm produces a biological individualising logic of power that fixes the individual to his/hers biological condition. This in contrast to the socialpsychological paradigm, which on the basis of its paradigmatic standpoints produces a social-group related logic of power.
Investeringsbeslut för småskalig vindkraft : en fallstudie
Wind power is one of the sources of renewable energy which has to be developed further in order to lessen our dependence on non renewable sources of energy. It's mainly oil and coal which have to be replaced by green energy. Wind power is already established in many countries, for example Germany, The United States of America and Denmark but it has to be continually developed and expanded to meet the needs of the growing energy consumption in the world. During the last few years many types of small wind turbines have appeared on the market. These small wind turbines are an alternative to the big wind turbines or power generators which demand huge sums of investment money.A new target group can now buy the small wind turbines in order to cover their own usage of electricity.
Sjuksköterskans uppfattning om livskvalitet
Background Satisfaction of life and wellbeing is shown to be important when the
quality of life is to be understood. The nurse has a significant role in the
care of the patient and in his/her experience of life.
Aim The purpose of this study is to examine the quality of life, from a nurse
perspective.
Method The text analysis was carried out with qualified attempts, of a book,
"Quality of life a challenge for the nurse" (in Swedish) by T. Rustoen, a nurse
who also worked as a teacher in Norway. The book describes how quality of life
is experienced from the patients and staffs view.
Results The text analysis showed that out of the ordinary descriptions of
quality of life, the author found four new themes. These themes where; the
meaning of solidarity, confidence, activity and meaningfulness in the existence.
Conclusion Quality of life is an important word, which means different to
different kind of people.
Finansiering av vindkraft : fallstudie av Lau Vind AB
The wind power increase of Gotland as well as other parts of Sweden during the last ten year period has meant that this renewable energy source has increased its share over other fossil sources. The year of 2011 became the first when the wind power produced more energy than an average nuclear reactor. Now that wind power is in an expansive phase, the land issue will be of great interest. Land with good wind resources will be of interest to wind energy developers. The problems that this essay is based on are; how can landowners altering the economic conditions at a wind power establishment? What opportunities and obstacles exist for landowners who choose to set up wind power on their land? The purpose of this essay is to highlight the economic conditions that exist for landowners for the establishment of wind farms, with regard to compensation for the leasing and return on invested capital.
Vad är kvalité : undersökning av uppfattningen om kvalitet i samband med verksamhet vid en skola
This dissertation was made since we wanted to investigate the conception called quality within the school sector. What it means and if there is something that can give an explanation of how they at look at the conception within the school sector. This will be the benchmark through the dissertation, trying to find out the most important things which might be equal to quality within the school.To find the answers of our questions we will read literature according to the subject. To get an increased understanding we will interview some people within the school efficacy, and give students a survey to fill in.The most important results from our investigation is to look at everything in its entirety, not only look at what grades students get. Even though this the most narrated sign of quality.