Sök:

Sökresultat:

808 Uppsatser om Constant air volume - Sida 53 av 54

Ifrågavarande kronopark skall benämnas Skatan : en skogshistorisk analys av Ekoparken Skatan

People have utilised and influenced the boreal forest for many centuries. Prior to the industrial revolution during the 19th century, however, human use primarily only had a low impact on the forest. When the timberfrontier swept over the country, the Swedish forests came to change for ever. The study site for this thesis is situated in the northern part of the county of Västerbotten, Sweden, and has previously been a National forest. Today the area is an ecopark and the land is owned by the forest company Sveaskog.

Neonicotinoids and honeybee health : the effect of the neonicotinoid clothianidin, applied as a seed dressing in Brassica napus, on pathogen and parasite prevalence and quantities in free-foraging adult honeybees (Apis mellifera)

Sub-lethal doses of neonicotinoids have been shown to negatively impact the health of honeybees. However, most studies to date have exposed bees only artificially to these pesticides under laboratory conditions. There have been just a few well designed and replicated studies of the impacts of realistic neonicotinoid exposure on honeybees foraging under field conditions. In order to close this knowledge gap, and to test the influence of the neonicotinoid clothianidin on honeybees, we used a study system of 16 paired, spatially separated (>4 km) spring oilseed rape fields in the south of Sweden. The fields were paired according to land use, the surrounding landscape and geographical proximity, using GIS.

Naturlig förekomst av arsenik och avskiljning av arsenik från grundvatten : test av olika filtertekniker avsedda för enskilda brunnar

During the last few years the presence of high arsenic (As) concentrations in ground water has been of major concern both internationally and in Sweden. Much evidence has been reported about toxic effects caused by arsenic. The carcinogenic effects and the possibility to measure the toxic impacts at low concentrations made the World Health Organisation (WHO) to reduce the guideline value from 50 to 10 ?g l-1 in 1993. In Sweden the corresponding reduction was implemented in 2003. Several surveys in Sweden have shown that high arsenic concentrations may occur in ground water.

Sheep enterprise budgets : beneficial planning tools within Agriwise Macedonia

Generally in Macedonia keeping farm records and farm business planning is not often practiced like an ordinary activity in farming. Therefore one of the crucial things to do it is to comprise and continuously practice record keeping of farm data. The efficient and justified farm business planning should be based on farm records about the previous work of the farm, which will bring a structured approach for planning all the activities, as well as provide a good basis for attracting investors and creditors for the additional expansion of the business.Given that sheep breeding holds an important part of the livestock production in Macedonia, there is a need for adding analytical sheep enterprise budgets to support the farm business planning process at sheep farms.The aim of this research was to develop sheep enterprise budgets created on the best production practice for Macedonian conditions of breeding and test their applicability into the farm business plan model Agriwise Macedonia. The sheep budgets were composed with a process of data collecting consisted of direct farm data (for the cases), expert's consultation and relevant desk research, as well as a literature study. The aim of doing it was to attain more accurate calculations of the enterprise budgets, which will result in a more precise outcome in the farm business plan model Agriwise Macedonia.

Tillväxtreaktion på kvarlämnade träd i Hagners "Naturkultur" försök :

The primary goal of this study was to investigate how the radial growth of retained trees responds after thinning-from-above. The National Board of Forestry which initiated this study, was interested in whether there were differences in the growth-response between the tree species Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst.). Another question of issue was if there were differences in the growth response between trees of different sizes. It is within the framework of the National Board of Forestry?s, Continuous Forests Project that these urgent questions are to be answered.

Den gamle och filmen : Om den nya generationen äldre och dess plats i det cinematiska rummet. En representationsstudie

Within the field of cinema studies, the question of visual representation is a fundamental pillar. An immense volume of theoretical work has been written on the subject, with various academic approaches such as feministic, postcolonial and gay/lesbian. Yet there is a large social group that seems to have been overlooked within the representational discourse: the elderly. This group of people appears to be a blind spot on the multicultural retina, too often neglected within the area of cultural studies. But as the baby boomer generation, who has always redefined the different stages of life (youth, adulthood, middle age), is entering old age, things are slowly changing.

Toleransproblem vid produktion och montering av prefabricerade betongelement

The idea with constructions made out of prefabricated elements is that it should be quick and easy to build as the demands for lower production costs, increased profitability and shorter production times are constantly increasing. High accuracy in measurements and well-balanced tolerances is required to achieve this. The fact that the concrete-elements doesn?t fit and that damage occurs during assembly is a highly topical issue even though we now have methods and systems that make this high-intensity construction possible. Through this report we want to highlight the problems that cause the dimensional and tolerance problems and give suggestions on how to come to terms with these.

Luftvärmeväxlare med låg ljudnivå : Även i symbios med solfångare

Rapporten handlar om ett examensarbete omfattande 20 p som är utfört för Thermia AB i Arvika. Uppdragsgivaren ville få fram förslag på möjliga åtgärder som kan minska ljudnivån från en luftvärmeväxlare. För bra helhetsbild av projektet, läs även kapitel: 6.Värmeväxlaren ingår som en komponent i ett värmepumpssystem, Thermia Aer 5, som använder uteluften som värmekälla. Huvudmålet med projektet blev alltså att undersöka och utvärdera ljudbildningen från värmeväxlaren samt att komma fram till olika förslag på möjliga åtgärder som har potential att sänka ljudnivån. Värmeväxlarens förmåga att uppta energi fick ej heller försämras.I projektets slutskede tillverkades det också en enkel prototyp på ett av designförslagen där den störande ljudnivån blev lägre.

Flyktingars upplevelse kring traumatiska händelser

The purpose of this study was to gain insight into refuges experience of traumatic events such as torture, political persecution, war, natural disasters and other trauma. For the study used theories which, inter alia, deals with many of the refugees coming to Sweden is influenced by various psychological trauma and may be accompanied by torture, political persecution, war, natural disasters and other trauma. To this study, a survey with 40 participants, 17 women and 23 men. There was also an interview on the Internet with a refugees consultant within the Red Cross. The men had higher average than women in all the perceived problems.

Till synes orörd skog : naturvärden och kulturhistoria i Rekdalen under 400 år

Nature conservation has for a long time been founded on the assumption that high ecological values depend on low human impact. In Sweden this has led to forests with these characteristics being strictly protected from human influences. However, it is also known that historical land-use can enhance ecological values in forests. Mountainous forests in Sweden, which have not been affected by modern forestry, have for a long time been considered as untouched by people. However, forest history research has in recent years shown that even these areas have been used by people for a long period of time.

Flyktingars upplevelse kring traumatiska händelser

The purpose of this study was to gain insight into refuges experience of traumatic events such as torture, political persecution, war, natural disasters and other trauma. For the study used theories which, inter alia, deals with many of the refugees coming to Sweden is influenced by various psychological trauma and may be accompanied by torture, political persecution, war, natural disasters and other trauma. To this study, a survey with 40 participants, 17 women and 23 men. There was also an interview on the Internet with a refugees consultant within the Red Cross. The men had higher average than women in all the perceived problems.

Analys av spänningsstabilitetsberäkningar i det svenska elsystemet

Numerical simulations play a vital role in both static and dynamic stability assessment of electric power systems and the foreseeing of voltage collapse. Simulations performed by Svenska Kraftnät(SvK) are mainly done in the specialized voltage collapse predicting software tool, SPICA and the more all?purpose software tool, ARISTO.The grid operators at SvK use SPICA to predict the maximum transfer limit at specified sections (in this report the section in concerns is the southern part of Sweden i.e. interface1 4). SPICA is mainly used as an online application by using actual states from the grid, these states update every quarter of an hour.This thesis is a continuation of the master thesis SPICA ? ARISTO JÄMFÖRELSE by Jakob Katzman and Johan Fält.

Den svenska fotbollens supporterkultur, huliganism och l?ktarv?ld. En kvantitativ inneh?llsanalys om hur svensk nyhetsmedia framst?ller supporterkultur inom fotboll

The aim for this study was to investigate, analyze and compare the way Sweden's main five news outlets portray and frame Swedish supporter culture surrounding football. In order to do so we formulated four research questions, all with the purpose to operationalize both the questions and the theories into data and results. The questions reads as follows: 1. What are the dominant portrayals in Swedish news outlets presentation of supporter culture? 2.

Ekologiskt kopplade institutioner inom jordbrukssystemet :

The farming system is the basis of human existence through its production of provisions for man. By a continuous exchange of information, energy and material, between the ecosystems and the social systems, the farming system becomes an emergent property. The system's own properties, in the sense of farming methods, circulations and institutions, evolve through an adaptive process. Understanding this process and constantly learn from it, is the starting point for creating a sustainable development within farming systems. Thus, future farming system has to develop strategies that produce food provisions while at the same time takes into consideration the ecosystem's resilience and its integrity, but which also enables an ethical discussion. The institutions within the farming system are understood as links between the ecosystems and the social systems.

Glycerol to dairy calves : effects on intestinal health and fluid balance

The bacterium Lactobacillus reuteri, which natural habitat is in the intestine of mammals and birds, uses glycerol as a substrate for production of the antimicrobial compound reuterin. Glycerol has been shown to decrease the number of Escherichia coli in human feces and it is believed to be due to in situ production of reuterin. E. coli belongs to the large family of Enterobacteriaceae, naturally occurring in the intestine, and pathogenic strains of E. coli have been shown to be one of several bacteria causing diarrhoea in calves.

<- Föregående sida 53 Nästa sida ->