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1117 Uppsatser om Pressure reducing valves - Sida 42 av 75
Teoretisk och experimentell utvärdering av Lättelement AB:s takinfästning
Lattelement AB in Ornskoldsvik is one of the leading companies in Sweden in composite elements in walls, floors and roofs in particular. The company supplies elements to buildings located with a wide geographical variation, which means that the products are subjected to very different climate with regard to snow, wind and humidity. This places high demands and requires the elements to withstand large variable loads.The elements are made of lightweight beams with flanges of structural timber and beam webs made of OSB. These are bound together by nogging pieces with the same kind of structure. On top of the beams a nailed and glued plywood is added to absorb compressive forces and on the underside of the element a sheet of steel is added for tensile absorption.These elements are then attached to the building framework in different ways depending on the particular element height, loads and the structual supporting material of the frame work.
Proteinkvalitet och biogena aminer i ensilage ? effekt på mjölkkors hälsa & foderintag
The aim of this paper was to explain protein degradation in silage and protein quality and biogenic amines in silage and their effects on the health of the dairy cows. After harvest-ing, the plant proteases degrade the proteins in the plant. The protein degrades to different fractions with different digestibilites in the rumen. Fraction A contains non- protein nitro-gen which is peptides, free amino acids and amines. True protein is in the fraction B and is further divided into three subfractions depending on their solubility.
Bakomliggande faktorer till presbyacusis; en litteraturstudie av mindre kända faktorer
Background: More than half of the elderly (65-84 years) in Sweden have problems with hearing. In some studiesit?s discussed if age related hearing loss or presbyacusis is a part of natural aging or if it depends on underlyingfactors.The purpose of this literature study was to analyse scientific papers which illustrate correlations between lessknown underlying factors and presbyacusis, defined from psychoacoustic and/or neurofysiological tests.Material and method; Literature study where scientific papers, relevant to the purpose of the study and thequestions at issue were found in the database PubMed.The result shows that cardiovascular disease, hormones, diet and drugs have an influence on presbyacusis. Thehealth condition of the individual and their lifestyle matters, likewise estrogen which according to the results of 2studies has a protective effect on hearing.Conclusion; The studies show that heart attack and high systolic blood pressure in women have a correlation topresbyacusis, but not in men, - the hormone estrogen, - some vitamins, antioxidants and diet have a protectiveeffect on hearing and studies show that smoking and alcohol have negative effects..
Den globala uppvärmningen : vad kommer att hända med morgondagens värld?
Mankind faces a serious threat. Its activities, for example the burning of fossil fuels, have led to an enhancement of the greenhouse effect - something that has given rise to a global warming. The climate is becoming warmer, a change that has important effects on the nature as well as for humans and their society. Sea level rising, extreme temperatures are becoming more common, glaciers and other ice caps melt and storms becomes more intense when they appear. The main cause is the emission of greenhouse gases into the atmosphere - carbon dioxide in particular.
Forsmark 3 ?Ett Framtida Biobränslekraftverk?
Recent turmoil surrounding nuclear power as an energy source, especially since the accidentat Fukushima, has largely contributed to the debate of whether or not nuclear power should beused as an energy source. This study has examined the economic feasibility of replacingForsmark?s 3rd nuclear reactor with a bio fueled power plant, and find out how this could bedone.The power generation that has to be replaced is equal to 1170 MWe. To replace this, 6 largescaleCFB-boilers, each providing over 200 MWe, were necessary. In addition to this, eachboiler required their respective turbine sets, comprising one high-pressure-, and one lowpressureturbine with intermediate reheating capacities.Based on this, a rankine-cycle was modeled using the software EES, to be able to calculatethe total heat required in the power plant.
Intryck som ger avtryck i en krympande värld : En kvantitativ undersökning om utrikesnyheternas fokus de senaste 30 åren
We have inquired into how the amount of foreign news has changed over the last 30 years in two major Swedish newspapers, which subjects and regions has dominated the content of the foreign news and what subjects dominate the reporting from certain regions. This was done with a quantitative analysis of subjects and regions written about in 1100 news texts during a week in each year of 1978, 1988, 1998 and 2008. To further broaden our study, we also charted with the analysis how the newspapers domesticate foreign news and how they use international news agencies. As a basis for our discussion we use Van Ginnekens theories of world news centres, Westerståhl & Johanssons and Galtung & Ruges theories of foreign news selection as well as the theories of Hjarvard and Biltereyst about the domestication of foreign news due to commercial pressures and objectives on the newspapers. Our result of the amount of foreign news in the two newspapers is also compared to several similar empirical studies by different researchers.
Trycksa?rsincidens efter la?ngvarig kirurgi
Trycksa?r a?r ett fo?rekommande problem inom den kirurgiska omva?rdnaden som leder till o?kade va?rd- och samha?llskostnader samt ett o?kat lidande fo?r patienten. Det a?r av stor vikt att va?rdpersonalen arbetar fo?rebyggande fo?r att motverka uppkomsten av trycksa?r samt att i god tid uppta?cka om ett trycksa?r har uppsta?tt.Syftet med denna studie var att underso?ka trycksa?rsincidens efter la?ngvarig neurokirurgisk kirurgi, identifiera vart trycksa?ren uppsta?r och om de kunde kopplas till riskfaktorer.Metoden som valdes var en kvantitativ prospektiv kohortstudiedesign fo?r att resultatet skulle kunna anva?ndas i den peroperativa och postoperativa omva?rdnaden. Hudkostymen inspekterades tva? ga?nger postoperativt pa? tjugoen patienter.Resultatet visade att 76 % av studiedeltagarna hade trycksa?r efter operation och det vanligaste fo?rekommande omra?det var ha?larna.
Modellering av reserv- och nödkraftsystem i JAS 39 Gripen
Simulation is a vital tool during development of JAS 39 Gripen, since money and time can be saved.The Auxiliary and Emergency Power System, AEPS, is a subsystem of the secondary power system in Gripen. It has the function of providing the aircraft with electrical and hydraulical power before activation and after deactivation of the main engine. The system also functions as backup in case of a safety critical problem in the main power supply system. The system basically consists of a control unit and an auxiliary gearbox. The gearbox is driven by an air turbine.
Energieffektivisering av stenstadshusen - genom byggnadstekniska energisparåtgärder
The purpose of this degree-project was to investigate the possibilities for primary air preheating into the two smallest waste incineration boilers of Halmstad Energy and Environment. The investigation is a pre-study which has the primary goal to evaluate technical and financial offers from companies that manufacture primary air preheater, and investigate if it is technically and financially profitable to do a purchase on primary air preheaters in the future.In the pre-study it is proposed that it is most efficient to have individual primary air preheater, one for each incineration boiler and the primary air are also proposed to be preheated by hot water in the pre-study. Further in the pre-study it is proposed that the heat-exchanger should have plain tubes instead of finned tubes, to avoid getting dirty fast. The space in the boiler-room is limited, and therefore the major problem was to fit in the primary air preheaters into the boiler-room. By comparing the different offers from the companies, the result in the pre-study shows that the offer from the company C.A.
Pelletering av tallspån : grundläggande studier
Wood pellets are an upgraded product of residuals from several wood processing industries, for example saw mills and pulp industries. The pellets are produced by pressing the milled and dried sawdust to cylindrical units with a higher density than the initial raw material. Pellets have great benefits compared to the raw material: high energy per volume, good transport and storage properties and homogeneity.
Several parameters collaborate in the whole process, which makes it complex. Wood is a heterogeneous material, chemically and structurally dependent on wood parts, habitat and storage procedures.
Alternatives for another world?: En kritisk analys av Occupy Wall Street-rörelsens idéer för strukturell förändring
In the wake of the latest financial crisis, a group of individuals launched the Occupy WallStreet movement. It wanted to change the structures that economic and political life arefounded upon. They believe that the established structures are unfair and exploit the majorityof the population. Researchers critisised the movement saying it was ambiguous because itcould not produce any realistic ideas for change, while others thought that was a success forthe movement.Therefore, the aim of this Bachelor Thesis is to examine the different ideas articulatedby the Occupy movement and present them systematically. Through an inductive qualitativetext analysis six different themes are identified regarding how the movement wants to changethe structures in society to make them fair.
Järnberikning av mjöl : exemplifierat med Egypten och Iran
The purpose of this study is to give an overview about iron fortification from the view of technique and health. Example of a technical aspect is different iron compounds which are used for fortification like ferrous sulfate, ferrous fumarate and elemental iron. In the aspect of health the big question is if iron fortification can improve the health in reducing the prevalence of anemia. The study focuses on flour fortification with iron in Egypt and Iran and involves a literature study with scientific articles. Also information from WHO (World Health Organization), FAO (Food and Agriculture Organization) and FFI (Flour Fortification Initiative) are used.Fortification means an intentionally increasing of the content of micronutrient in foods with the aim to improve the food quality and deliver a nutritional benefit to the consumer.
Investeraravdraget : En ändamålsenlig lösning på den skattemässigt asymmetriska behandlingen av bolag finansierade genom eget kapital respektive lånat kapital?
Companies financed through borrowed capital are allowed a tax deduction for the costs re-lated to their borrowed capital. A similar tax relief for companies financed through share-holder?s equity does not exist, why these companies are taxed higher than companies fi-nanced by borrowed capital. The result is that there is an asymmetric tax treatment of companies depending on how they are financed.The autumn of 2012, the Swedish government presents a proposal for an investor deduc-tion which seeks to equalize the above mentioned asymmetry. The proposed investor de-duction is a tax relief for investments in shares in a startup- or small company equal to 50 percent of the acquisition cost of that investment.The venture capital deduction, which in this thesis is treated as an alternative to the inves-tor deduction, is an interest-free tax credit which significate that two-thirds of the acquisi-tion cost is deductible from taxation at the time of the acquisition.
Anpassning av passivhus för ett kallare klimat - teknisk och ekonomisk analys
The purpose of this degree-project was to investigate the possibilities for primary air preheating into the two smallest waste incineration boilers of Halmstad Energy and Environment. The investigation is a pre-study which has the primary goal to evaluate technical and financial offers from companies that manufacture primary air preheater, and investigate if it is technically and financially profitable to do a purchase on primary air preheaters in the future.In the pre-study it is proposed that it is most efficient to have individual primary air preheater, one for each incineration boiler and the primary air are also proposed to be preheated by hot water in the pre-study. Further in the pre-study it is proposed that the heat-exchanger should have plain tubes instead of finned tubes, to avoid getting dirty fast. The space in the boiler-room is limited, and therefore the major problem was to fit in the primary air preheaters into the boiler-room. By comparing the different offers from the companies, the result in the pre-study shows that the offer from the company C.A.
Synen på de hemlösa och deras livssituation : - en kvalitativ studie
AbstractThe intention of our study is to examine how the view of homeless people and their life situation looks according to a selection of persons, which in their work get into contact with homeless people. The study is based on a qualitative method that includes interviews.The result of the study is based on interviews with eight persons working in the social services, volunteer organisations, the police and a security organisation. The majority of the persons that have been interviewed are normalising homeless people; they do not look upon them as different. At the same time they have the opinion that homeless people live a tougher life and that they have to fight more for their living than other people. The persons that we have interviewed share the view that homeless people live under a constant pressure of finding a place to sleep.