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808 Uppsatser om Constant air volume - Sida 31 av 54
Marktillstånd och borbrist på åkermark planterad med gran i Västerbottens län :
This study was made on former agricultural areas that had been planted with spruce or pine, in the county of Västerbotten. The goal of the project was to investigate suspected deficiency of boron in these areas. Several objects have been reported for possible deficiency and some of these have the characteristic symptoms of boron-deficiency. The hypotheses are that
1) Boron deficiency is present at several of the investigated objects.
2) Planting of forest on cultivated postglacial sediments leads to a successive podzolisation with a decreasing content of organic matter in the mineral soil, due to decomposition, and a decreasing pH in the soil, even on locations that have been added lime.
To be able to confirm or reject the hypotheses a number of tests were performed.
HemoCue Cognatus - Ett Intelligent Analysinstrument
HemoCue AB is a multinational corporation targeted on manufacturing point-of-care analysisinstruments for medical treatment. Their main product, the DM 201, is outdated and has bigissues gaining new market shares. For example, no medical treatment center in Sweden usesDM 201 frequently. The project of developing a new instrument to replace it was assignedtwo students at the development engineering program at Halmstad University. The projectalso included integration of the new platform for DM 202 to HemoCue AB:s remainingproducts.The project began by defining the different technical areas concerned.
"Man vill ju se bra ut" : En kvalitativ studie om ungdomars syn på sociala medier
This thesis examines young people's thoughts about their presence on social media. With asocial constructive approach the study focused on how young people think and act on socialmedia in relation to constructions of gender and normality. The analysis is based on fourgroup interviews with 13-year old boys and girls. The theoretical approach is based partly onsocial constructionism where discourses and ideas of normality are identified and analyzed.Erving Goffman's theory of social interaction was central to illustrate how young peoplepresents themselves based on the prevailing discourses. It is clear that they adjust theirrepresentations of themselves depending on the context.
Produktivitet vid stubbskörd :
Stump harvest could be found in the late 1970?s and the early 1980?s. And now when the prices on energy are high it has become an interesting topic again. This work has been conducted within Holmen Skog?s stump harvest testing in Norrköping.
Den kvinnliga anatomins sociala konsekvenser : En kvalitativ studie av argumentation och doxa i förändring rörande den svenska aborträtten
Abortion remains a contentious issue, which greatly raises ethical problems. This thesis examines the leading arguments in the Swedish abortion debate around the ? in terms of legislation ? critical years of 1938 and 1974. With Foucault's genealogical method, Butler's theories of gender as a social construction in relation to power and doxa, the study examines what the development of the argumentation says about the views on morality, the woman's body, life, individual and state? How has the arguments pro and against abortion changed over time and what does this say about the norms that guide and orientate the arguments? The most obvious change in argumentation is seen in the shift from an absolute moral and conservative position into an increasingly relativistic and liberal position, and this study will argue that this shift has its prerequisites in the changing status of the citizen and state.
Rening av avloppsvatten med anaerob membranbioreaktor och omvänd osmos
This master's theses was carried out on assignment from Stockholm Vatten AB as a part of a project developing new waste water treatment techniques. The goal of the theisis has been to evaluate an anaerobic membrane bioreactor for treatment of waste water from Hammarby Sjöstad. The bioreactor has not been heated and the main interest has been to study the gas production, power consumption and the reduction of organic matter and nutrients.The system has been completed with a reverse osmosis unit and a total of four batch runs have been made with good results. The use of reverse osmosis allows nutrient in the waste water to be reintroduced into circulation as the reverse osmosis concentrate can be used as crop nutrient.The membrane unit is of VSEP ("Vibratory Shear Enhanced Processing") type and an extensive membrane test has been conducted. This so called L-test helped determine the most suitable type of membrane for the system to allow a higher ±ux and thus lower power consumption.
Glaset i Centrum : En fallstudie på New Wave Group
Seen in many trends and studies, consumers of today feel a growing desire to experience the uniqueness in products and services. This is forcing companies be more innovative and creative in their marketing, in order to distinguish and differentiate themselves and their products/services. We believe that creating a top-to-bottom experience strategy is one way that a company can succeed in this.The purpose of this thesis is to analyze and clarify how a business can reinforce their product experience through a complete experience strategy. In order to demonstrate this we have made a case-study research for the New Wave Group, advising them on how they can place blown glass art at the heart of the town of Kosta.The authors have used qualitative methods and an abductive approach. Four interviews have been completed with executives from the New Wave Group, including the project manager, hotel manager, head of the Kosta Boda smeltery and head of guides and visitors at Kosta museum.
Kulturbegreppet i skapandet av nya medborgare : En uppsats om integrationsprocesser och diskurser i det sena 1900-talets Sverige
In this thesis the author has through a discourse analysis examined how the concept of culture has been used in the discourse of integration during the late twentieth century in Sweden. The author argues that the integration of immigrating people has been the fundamental method in creating Swedish citizens within the immigrant communities. In this discourse the concept ?culture? has been a constant recurring way of explaining differences among the immigrants towards ?ethnic swedes? and Swedish way of life and establishing difficulties in performing integration outside of governmental policies. When looked upon in terms of discourse the integration process is the possibilities, intents and interests and the actual creation i.e.
Barns lek och hälsa -ur ett föräldraperspektiv : "Det krävs balans för att få ett tryggt barn i en sund kropp"
Background: Children are different and they live under different conditions, but one they have in common - the desire to play. Children's play is important for their health and wellbeing. The aim: was to highlight the knowledge and issues that preschool children's parents have about young children's health and wellbeing, with a focus on physical activity and play, to promote health. A further aim was to highlight the obstacles and opportunities that parents experience regarding physical activity for young children. Material and Methods: The main study two focus group interviews were used with eight parents of children of preschool age.
En jämförelse avseende beståndsgående-och stickvägsgående gallringsmaskiner
The purpose of this report is to investigate and compare the difference between stand-thinning machines and strip-road thinning machines, and how they affect the stand on behalf of future growth, theoretical economic result, wind impact, snow pressure and density of stand.
The investigation is regarding the first commercial thinning of pine stands, after pre-commercial thinning that was well conducted.
The investigation area was located near Katrineholm, Sweden. The measurements that were measured were strength of thinning and amounts of wind throws, snow-breaks and hauling damages.
The results that emerged, was that thinning with strip-road machines had a significantly higher strength of thinning over all, as compared with the stand- thinning machines (45 percent versus 30 percent).
Comparisons between wind-throws, snow-breaks and hauling damages of the stand could not establish any significant differences between the two methods that were investigated.
Conclusions, over all, were that if forest owners want to have more timber volume left for second thinning and final cut of the stand, the forest owners should choose the method with stand-thinning machines. From the point of view of gentle treatment of the stand and ground damages the choice should be the same.
However, the method with strip-road thinning machines is the most common and accessible method in Sweden. Most likely it is the most economical way to manage the stand for forest owners in present time.
If the method with stand-thinning machines is becoming more common in Sweden, it is suggested for forest owners to consider the stand-thinning method as a candidate for treatment due to economic aspects..
Utvärdering av ett Bränslecellsdrivet Flygplan.
With the increases in fuel costs due to the depletion of the world oil reserves and the increase of greenhouse gasses as a consequence to using oil as a fuel many companies are looking to new and innovative ways to power their aircraft. One of these new ways to power an aircraft is using fuel cells powered using hydrogen and oxygen, thus producing nothing but water vapour and small amounts of nitrogen dioxide as well as trace amounts of other emissions. Both Boeing (1) and Politecnico di Torino (2) have shown that it is possible to build an all-electric aircraft powered by fuel cells. Both flights used small, two-seater aircraft and a constant between them was the loss of the co-pilot seat due to weight and lack of space. As this paper will deal with a commercial aircraft a primary concern is the cargo and passenger capacity and whatever impact switching propulsion system has on these.
Facebook, E-post, SMS & Mobiltelefoni : en explorativ studie om hur unga vuxna upplever den ständiga tillgängligheten
Purpose/Aim: In the information and communication technology society (ICT) we live in today it is easy to feel that we are constantly expected to be available. The daily contact with the Internet and the use of cell phones has changed our way to communicate. With this in mind in combination with the increased stress among young adults my aim is to investigate how young adults, aged 23-26 years, experience to be constantly connected and available through the Internet and the cell phone. What are their opinions, attitudes and feelings about what this entails in their lives?Material/Method: The essay is based on four focus group interviews with sixteen students from Uppsala University aged 23-26, two groups consisting of women and two groups consisting of men.
Mat(o)vanor bland flyganställda : - måltidsmönster och upplevelse av möjlighet till återhämtning med oregelbunden arbetstidsförläggning
AbstractFood and recuperation has a superior importance in human life and it is hard to deny thedistinction of the food in everyday life. Nutritious food gives energy to benefit activitiesof the day and influences on behavior and performance as well as well being. Themeaning of the terms meal and mealtime are key concepts in this study and the severalbeneficial aspects beyond the physiological function. Inadequate time for the mealmight provide degenerative consequences for individual health and generate outgoingsfor society. The aim of this study was that from an individual perspective describe workenvironment conditions for meals and recovery potential among employees withirregular working hours using mixed methods with both questionnaire and interviews.Four (4) airline employees participated.
DEN ONDA CIRKELN : En allmän litteraturstudie - om hur personer upplever smärta vid svårläkta ben- och fotsår
Bakgrund: Smärta vid svårläkta ben- och fotsår är ett vanligt förekommande problem som ofta är underbehandlad. Smärta påverkar sårläkningen negativt och är ett komplext hälsoproblem. Smärta kan ses utifrån olika dimensioner vilka påverkar personen på olika sätt. Syfte: Syftet var att beskriva hur personer upplever smärta vid svårläkta ben- och fotsår. Metod: En allmän litteraturstudie baserad på kvalitativa empiriska studier.
The role of cell cycle control mechanisms in regulated and sustained cell proliferation
The cell cycle is the time a cell spends between two cell divisions. The cell cycle includes several parallel processes, all of which must be completed before a cell is mature for dividing.
In the first place, all subcomponents (RNA, protein and membrane lipids) need to double in quantity and this occurs continuously through the cell cycle. Furthermore, the genome and some chromosomal proteins must double and this take place during a limited interval in the middle of the cell cycle (S-phase). On either side of the S-phase are two "gaps" which is called G1 and G2.
When the cell has passed a point in the G-phase they are irreversibly programmed to progress through the remaining of the cell cycle and will undergo the next cell division. When a cell have passed a point in the G1 phase, approximately four hours after mitosis, a normal cell is in a state of indecision.