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2603 Uppsatser om Constant current regulator - Sida 21 av 174
Utvärdering av anaerob behandling av hushållsspillvatten och tekniker för efterbehandling
The continuous process of urbanization results in demands on research and development for ecological and sustainable city development. Because of this, the current systems for wastewater treatment may have to be improved. In order to evaluate new technologies for municipal wastewater treatment, a development project has been initiated for the new district Hammarby Sjöstad in Stockholm. The project is lead by the company Stockholm Water. High environmental standards have been put up for the district, as it must be twice as good as an ordinary new district.
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..
Romer och utbildning : En arena för särskillnad, paradoxer och stigmatisering.
This thesis analyses how romanies look upon schooling and how they reflect upon the possibility of getting an education. Many inquiries relating to romanies have been published in Sweden but very few are based on fieldwork among romanies. The aim of this thesis is therefore to through fieldwork focus on how romanies themselves look upon their educational situation.The main questions for this study are: How is the image of romanies as a problem constructed in school? How are romanies separated from other students? How is the interplay between romanies and school representatives formed? How do romanies look upon the possibility of getting an education and does their perception differ from the usual official apprehension?An important conclusion concerns how social workers and teachers continuously categorize romanies as different. The group is constantly differentiated from other ethnic groups and is often the target of integration projects.
SMED implementation vid slipoperation
The thesis has investigated how Sandvik Coromant could implement the SMED principle on one of their grinders groups and what improvements it would lead to. The aim of the thesis is to identify the current situation and investigate how their setup times would be affected by SMED. The work initiated with a literature analysis about the SMED principles and then proceeded with an analysis of the current situation where the activity was time mapped. The analysis consisted of time trials of the process that the thesis would include. The time studies revealed opportunities for structural improvements to create environment for a more structured process.
Cassava as an additive in biomass fuel pellet production :
In this study, the effects of using fine milled cassava stems as an additive in biofuel pellet production was compared to the effects of refined starch addition. The bulk biomass fuel raw material, to which the additive was added, was a blend of spruce and pine sawdust. An experimental design in the factors cassava/starch content, moisture content and material temperature was used. Measured responses were pellet bulk density, pellet durability, amount of fines, pelletizer motor current, pellet temperature, die temperature and CV for pelletizer motor current (a measure of process stability). Each response was modeled by multiple linear regression (MLR).
oikos ? nomos eller logos? : Hållbar utveckling och ekonomi i gymnasiets samhällsböcker
This paper contains an analysis that sets out to investigate how sustainable development is portrayed in textbooks used in gymnasium level civics education. The study covers three textbooks, all in current use. The paper sets out to explore the relationship between the books chapters on economics and those about environmental issues. The sum of these two parts is in the context supposed to make up the books big picture of green sustainable development, i.e. the ecological aspect of sustainable development. An analytical model will be used to categorise and compare the three textbooks.The method chosen for this is analysis of ideas by use of ideal types.
Tillfällig klädförvaring
This degree project has been carried out by Niclas Andersson and Sebastian Zwahlen, students of the Innovation and Design Engineering Program at the Faculty of Technology and Science at Karlstad University. The project was carried out during the spring 2010 and includes 22, 5 ETCS credits.Initially the group had contact with the company Mavis möbler AB. Mavis gave the group the task of developing a new bedroom product. To assess the needs and problems of bedroom behaviors, an extensive questionnaire and several interviews were made. This became the starting point for further work.According to the results uncovered during the market research a vast problem was found with temporary clothing storage.
Vermicompost for reduction of vegetable waste - and a possible means to produce fish feed in aquaponic systems?
Aquaponics is a food production system consisting of a consecutive cultivation of plants and aquatic animals, fish or shellfish, in recirculating water. The plants feed on the nutritious effluents from the fish tank and bacteria converts ammonia from the fish tank into nitrate that is absorbed by the plants. The plants receive nutrition and the fish gain purified water.
The environmental impact of the production of fish meal and fish oil used in conventional fish feed includes a large consumption of fossil fuels with subsequent carbon dioxide emission.
The aquaponic system can be made environmentally sustainable and self-supporting if supplemented with a vermicompost/vermiculture for the production of worm protein as a fish feed.
Vegetable waste from the hydroponic part of the system can be reused as worm feed in the compost and the protein rich worms can be harvested, dried and grinded and brought back to the aquaculture as fish feed.
As a first step in this direction, I have investigated the effect of recycling of vegetable waste in vermicomposts on the growth and number of earthworms (this was evaluated after harvesting).
The hypotheses were that earthworms can be cultivated in the vegetable waste and that by adding manure to the vermicompost it is possible to obtain a nutrient content adequate to support a continuous worm harvest, in other words create a vermiculture.
Eisenia fetida and Dendrobaena veneta were grown in 20 L bins containing peat mixed with either poultry or cattle manure. The proportions were 70% peat and 30 % manure. Discarded plant parts from lettuce cultivation was added to the vermicomposts (35 g per week) and water was supplied
with 0.8 L per week.
Lean Produktion på mjölkföretag - fungerar det?
The contact company, LRF Konsult, is a consulting firm specialized in areas of law, real estate, finance and taxation. Discussions on the subject of agricultural improvement in the area of Lean, has primarily been driven by the Royal Swedish Academy of Agriculture and Forestry, where LRF Konsult also participated. This thesis can be seen as a preliminary study of how Lean can work within agricultural enterprises.The thesis primarily focuses on the possibilities dairy farms have to improve operations. What practical benefits they can obtain through the implementation of Lean. And how an implementation could take place.By visits to two dairy companies, and through interviewing their respective business leaders, an image of the companies activity for improvement, in connection to this thesis was established.
Anestesiologisk omvårdnad av patient med obesitas
ABSTRACTBackground: Obesity and overweight are health issues that more than every tenth person around the world suffers from and the number of individuals with BMI >30 is every growing. As a result, more patients that are subjects to anesthesia will have an increased BMI. Changes in respiration, airway anatomy, altered drug metabolism and multiple physiological changes in the body makes general anesthesia, of the patient with obesity, an anesthesiological challenge.Purpose: The aim of this study is to identify the specific anesthesiological nursing care of the patient with a BMI >30, undergoing general anesthesia.Method: A research plan is created and to test its credibility, a pilotstudy of 15 surveys in two surgical departments will be conducted. This study has a qualitative inductive design and the data collected through semistructured questionnaires. The result was analyzed using qualitative content analysis.Result: The result showed a clear focus on three main areas; airway management, pharmaceuticals and positioning of the patient.
The experience of MS-related fatigue
Background: Multiple Sclerosis (MS) is a chronic disease that mainly strikes young people in working age, twice as many women than men falls ill. Approximately 85 % suffers from MS-related fatigue that divides itself from common fatigue in that way that it is persistent and does not disappear in spite of sleep. This fatigue is experienced of many as one of the most difficult symptoms, which has considerable impact on the everyday life. Aim: The aim with the study was to elucidate how MS-related fatigue was experienced by persons with MS. Method: The study has been implemented as a literature study through systematic review of scientific articles.
Systemet framför allt? : En studie över dokumentationskraven i grundskolan
The education sector can be seen as a cornerstone of today's society, an organization that is under constant change and evolve as society. The compulsory school system is of significant role in society that places high demands on its management. The following study investigates the requirements for documentation in primary school organization and operations, and how these requirements are perceived and affect the school's organization and activities of the study carried out at different levels of the organization so as to get an overall picture of its impact. In order to analyze and create understanding of the results, the study applies the theory of New Public Management and various reforms that can be linked to the increased documentation requirements and its influence in the public administration. Study results show that there is a mixed picture of the documentation impact on the school system. Shown are both positive and negative effects of the documentation requirements.
Jag bara lärde mig! : En studie om typografi i läromedel för läsinlärning
We studied the initial process of reading, with a focus on typography, whether it ispossible to increase childrens lust to read in the age six to seven years old, byadjusting the typography and graphic design. We conduct this study through qualitative and quantitative studies, mainlyinterviews with a main focus on children in this particular age were used. In additionto the interviews a questioniare were sent out to a selection of students. The studyalso contained an interview with a pedagogue as well as studies of the current andexisting textbooks and teaching aids that is used on the school we are looking into.During the study we consulted educated pedagogues to get an understanding of thechildren and their learning and to be able to approach them in a suitable way.The theories we have been using were mainly from a typographic point of view.Other areas we explored were theories about reading processes. This study showedthat every child needs a method that is suitable for them and that the materialprovided today is typographically inconsistent. The childrens and teachers needs andwishes in typography did not correspond with the current teaching aids design. From this study the followning points were made about how to design a textbook forchildren in the first grade:? The typeface should be a sans serif.? The point size should be bigger than 12 points.? Text should be aligned to the left.? Sentences should be short without becoming abstract.? To maintain focus on the text the layout should be simple and unbarked.? The format should be designed after the pourpose of the publication, forexample when it is a complement to the textbook, the format should be of suchcharacter that it is easy for the children to bring home.? There should be a typographical consistency through all of the materialsprovided to the children..
Vidareutbildning under arbetslivet : små och medelstora revisions- och redovisningsbyråers syn
In our study the purpose was to examine the influence of Continuing Professional Education on small and medium sized auditing- and accounting practices. The study also aims to analyze possible similarities and differences in how small and medium sized auditing and accounting practices are affected of the requirements regarding Continuing Professional Education. In order to fulfill our purpose in the study we conducted interviews with auditors and accounting consultants on small and medium sized auditing- and accounting practices. Totally did we conduct seven interviews with four auditors and three accounting consultants. The majority of auditors and accounting consultants we interviewed are satisfied with the current requirements on Continuing Professional Education and think they contribute to the increase of quality and status of the work tasks performed by auditors and accounting consultants.
Förstudie för skapandet av ett miljöövervakningsprogram : en styrkeanalys angående vattendrag i västerhavets vattendistrikt för fastställandet av provantal i tid och rum för ett effektivt omdrevsprogram
The environmental monitoring in Sweden has been developed by several different parties and is now being coordinated and made more effective in order to meet the current demands on high quality information regarding the state of the environment. Sweden has been divided into five different water districts based on watershed areas because of requirements in the Water Directive of the EU. In Sweden there are two common types of environmental monitoring programs used to gather information on changes in time and in space. Currently both these two types are used for lakes in the water district of the western sea but only one is used for watersheds.
The purpose of this report is to supply basic information regarding the possible need for a second environmental monitoring program for watersheds in order to better describe the spatial variation within the district as well as to determine the number of samples necessary in order to describe the district over time and space.