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858 Uppsatser om Coefficient of heat transmission - Sida 41 av 58
Internkommunikation på Gruvön : Modern kommunikation inom industrin
The bulk of the research within the field of media and communication is concentrated at theforefront of development, studies focus on modern companies and modern communication.However, many people work in the industry, where the conditions for communication are partly different. The aim of this study is to explore the possibilities for internal communication that the employees have at the base industrial company of Billerud Gruvön, Sweden. How important do they feel that communication is? Can the internal communication within Gruvön be described as modern, where dialogue between the staff is possible, or as orders from the top down to the bottom of the hierarchal structure?These are our research questions:Which channels are used for communication within Gruvön, and how are they used?How important do the employees deem the internal communication to be?Can the communication within a hierarchal industrial company such as Gruvön be described as modern, where dialogue is at the center, or does the communication consist basically on orders from the top down to the bottom of the chain?Our research is based on the following theories: Communication, Organizational communication, Internal communication and Organizational culture. We have looked to earlier research such as the doctorates of Simonsson (2002) and Johansson (2003) to further our understanding.The methods used are interviews with operators, middle management and the informationofficer at Gruvön.
Reliabilitetstest av kraftmätare ISOP - ISOmetric Power device
SammanfattningSyfte och frågeställningarSyftet med studien var att i ett test-retest utvärdera tillförlitligheten i den nyutvecklade kraftmätaren ISOP vad gäller isometrisk muskelkraft i handledens tre rörelseplan. Den frågeställning som låg till grund för studien var följande:Föreligger det någon signifikant skillnad i uppmätta värden vid upprepade mätningar av handledskraft vid två separata testtillfällen (s.k. ?test-retest?)?MetodEtt test-retest utfördes på 20 stycken testpersoner (tio kvinnor/tio män, ålder 28-48 år, medelvärde 38,6 år), utan tidigare hand- eller handledsskada. Åtta mätningar utfördes i sex olika handledsriktningar: flexion, extension, radialdeviation, ulnardeviation, pronation och supination av dominant hand samt flexion och extension av icke-dominant hand.
Uppgradering av biogas i systemperspektiv med avseende på miljöpåverkan och kostnader
Swedish biogas is currently produced mainly by anaerobic digestion of sewage sludgeat sewage treatment plants, landfills and anaerobic digestion of household or industrialwaste. Also cattle ma-nure from farms can be used to produce biogas. Upgradingbiogas represents an increase in methane concentration from about 65 % to about 97%. In addition, particles and contaminants must be sepa-rated from the upgradedbiogas. There are various methods for upgrading and this report compares sixdifferent methods with respect to environment and economy: water scrubber,Biosling, cryo technology, chemical absorption, Pressure Swing Adsorption (PSA) andmembrane separation.According to the used ORWARE model, chemical adsorption with amine has the leastenvironmen-tal impact (methane emissions) and the lowest costs.
Interferences during analysis of polyphenols in fruit juices
One of the most commonly used methods for analysis of polyphenols is the Folin-Ciocalteu (FC) method, where the FC reagent has been reported to interfere with some substances in fruit juices. The interfering substance that is present in the highest amount in most fruit juices is ascorbic acid. In this study, the total phenolic content (TPC) of three fruit juices was analysed by the FC method as well as with an enzymatic method with hydrogen peroxide oxidoreductase type II (HRP) for comparison. To investigate how the interfering ascorbic acid affects the TPC, juice samples were analysed after removal and addition, respectively, of ascorbic acid. The samples were analysed with HPLC both before and after the extraction phase of the FC method.
Går det att ställa om en lina för axelbearbetning på 30 min? : En fallstudie på Scania Transmission, Södertälje
Tillverkningslinan för växellådans ingående axel har funnits i sitt nuvarande utförande sedan sensommaren 2013. Omställningstiden för linan översteg med råge det önskade, vilket ledde till långa stopptider och förlorad produktionstid. Under de förutsättningar som rådde hamnar genomsnittet för omställningstiden någonstans i intervallet 3-4 timmar, men tider kring 6 timmar hör inte till ovanligheterna. Målet med uppdraget var att, på den observerade linan, sänka omställningstiden till 30 minuter samtidigt som produkternas kvalitet bibehålls. Ett delmål under arbetets gång var att skapa förutsättningar för att tidsvariationen minskas samt att det definieras hur omställningstiden på linan ska mätas.
Hantering av småskalig elproduktion : Utveckling av modell för dokumentation och elkvalitetsberäkningar
The interest in small-scale electricity in Sweden has increased strongly in recent years. The interest is noticeable both among politicians to increase the share of renewables in the energy mix, and among electricity consumers to partially replace purchased electricity with self-produced. This has resulted in a significant increase of electricity production in low voltage grids in recent years, and the trend appears to continue in the coming years. The majority of the new production plants are solar cells, followed by wind turbines, and it is also in these the greatest efforts are made in this paper.Distributed generation is often seen as something positive since it will contribute to reduced transmission losses and reduced voltage drop in the networks, and that it increases the share of electricity from renewable sources. In cases where the grids are not strong enough, or in other ways not adapted to manage the installed production, power quality may be adversely affected.
Vision Nollenergihus : Energiförsörjning av passivhus med sol- och vindenergi
Climate change is the modern society?s common issue. The developed countries areconsuming more than what is sustainable, and the climate change due to the use offossil fuels can be seen clearly. EU has specified goals, in order to stop furtherdamage, which demand that every member state have to reduce its energyconsumption by 20 % before 2020 and 50 % before 2050, relative to 1995.The Swedish government uses a number of instruments to encourage reduction in theusage of energy, but every individual has to contribute to reach the goals.With increasing energy price the cost of living is going up. A lot of people are lookingfor ways to save energy and not be affected as much by the increasing price.Investments for insulation, replacement of windows and replacing old heating systemfor a new efficient heat pump is getting more and more common.This thesis is about investigating the possibilities in becoming independent from buyingenergy for households.
Förskolor med passivhusteknik : En utredning av passiva förskolor
As a result of directives from EU, with the ambition to reach environmetal goals, The German organisation Passivhaus Institut has defined a passive house. A passive house is a building that is very energy efficient and makes a small impact on the environment. The energy from the inhabitants as well as the appliances & fixtures in the building should equal the energy that is required to heat the building. A Swedish version of the passive house definition has been defined, taking into account the climate conditions and the difference in building regulations.This thesis is a request from Skanska on how it can improve and develop an ongoing passive house project, involving an infant school. The intention of this thesis is to identify difficulties & display potential development areas for infant schools.The method of research conducted is as follows: interviews of clients, ventilation consultant, consultant for heating system and an energy calculation consultant, an inspection of the infant shcool in process, investigation of completed infant schools and a study of relevant literature.From this research it was found that it is difficult for infant schools to pass the criteria for passive houses. The conclusion of this thesis provide several guidelines on how to improve the outcome of existing projects & the steps needed to be taken for future development in this area..
Effektivisering av lagringsplatser. Ett förbättringsprojekt på Mekpart AB
Aeroseum is an aviation museum located in an old military underground hangar. The ventilation system in the hangar is designed for the military purpose of the hangar. This design includes a solution with air flowing through the space between the construction of the hangar and the rock surface. The solution is intended to avoid a buildup of inflammable gases. This design leads too high humidity levels in the hangar.
Konvektorsdimensionering för kallrasmotverkning : En metod för att motverka kallras för stora fönster
Denna rapport visar härledning och tillämpning av en ny metod som skall användas för att dimensionera konvektorer. Dessa konvektorer dimensioneras enbart för att motverka kallraset längs stora fönster. Detta skall uppnås genom den naturliga konvektionen som luften går igenom, vilket i sin tur är orsakad av en konvektor placerad under ett fönster. I dagens samhälle sker konvektorsdimensionering enbart för att ersätta transmission och ventilationsförluster, ingen hänsyn tas till kallras. Tidigare arbeten kring luftströmmingar, flänsar, naturlig konvektion och Nusselts beräkningar har studerats.
Torsionsanalys av vevaxeln kamaxeln och motortransmissionen på Scanias D12: a
Syftet med examensarbetet är att ta fram en modell för torsionssvängningar i systemet vevaxel, motortransmission och kamaxeln på SCANIA's 12 liters dieselmotor DC1201. Det höga gastrycket och injektortrycket på SCANIA's dieselmotorer ger upphov till stora moment på både vevaxeln och kamaxeln. Dessa moment varierar kraftigt med tiden och skapar torsionssvängningar hos de båda axlarna samt hos motortransmissionen. Modellen som presenteras är linjär och av frekvens respons typ, den beskriver förloppet i fortvarighet. Axlarna och transmissionen är diskretiserade med totalt 37 frihetsgrader.
En jämförande studie kring några av dagens produkter inom Store and Forward och Live
SVT is Sweden?s largest TV-network and broadcasts more then 22 000 hours of TV each year. SVT is a public service company where the basic idea is to reflect the world from different perspectives and news is very important for providing neutral and versatile information in a variety of areas. An important part of the flow of information is to continuously receive reports from all corners of the world around the clock. This places very high demands on the technology used and it is important that it function and develops to meet current and future growing needs.
Hiv i Sverige - Prevention, sexuella attityder & beteenden
ABSTRACT. Introduction: Human Immunodeficiency Virus (HIV) is a retrovirus which occurs worldwide and spreads between humans mainly through sex, from mother to child, blood and blood products and between injecting drug users. After been infected with HIV for a couple of years the final stage of the infection progress into Acquired Immune Deficiency Syndrome (AIDS), and there is no cure or vaccine, only medication that delays the development of the disease. Objective: The aim of this thesis is to examine the preventive work against HIV in Sweden, the groups at risk for getting infected and to highlight sexual attitudes and behaviours among adolescents and young adults. Method: A literature based study method was used and the material is based on scientific articles and reports from active actors within the field of HIV prevention.
Fortplantning och fortplantningsproblem hos tikar av svensk och finsk lapphund : en jämförande studie
The Swedish Lapphund is one of our eleven Swedish domestic breeds of dogs and one of Sweden?s oldest dogbreeds. The Finnish Lapphund?s origin and physical conformation is similar to that of the Swedish Lapphund.
One aim of this study was to examine whether the average litter size differs between these two closely related breeds, and if so, try to find causes for this.
Biogas : En systemanalys av Solna Stads matavfallsprocess
Global warming is a huge issue that humans have contributed to through over-exploitation of natural resources and extensive usage of fossil fuels. Now more than ever, we need to embrace a recycle thinking and reuse our waste, for example through producing biogas from our food waste. The purpose of this report was therefore to identify the energy usage and emissions resulting from the biogas chain which spans from Solna Stad to Uppsala Vatten. Furthermore, potential efficiency improvements were to be identified and proposed. This report focused mainly on the first part of the biogas chain that includes the collection of the food waste and the reloading process.