Burkina Faso as well as most sub-Saharan African countries struggle with providing food for a fast growing population. The dominating farming system is agroforestry parklands. Agroforestry parklands can broadly be defined as areas where scattered trees occur on farmlands as a result of selective clearing. The presence of trees in crop fields may in the long term have a positive effect on the production of annual crops. It is commonly discussed, but not proven, that the presence of trees leads to increased groundwater recharge due to higher infiltration capacity of the soil.

During the past years fire has been identified as an important factor for nature conservation in the forest landscape. To accurately quantify the size of a burnt area is obviously important, but also to quantify the degree of fire damage to the tree canopy. Such data are important for assessing the conservation value, and to support planning and management of the burned area in the future. I have examined how to estimate the status of tree crowns after fire from interpretation of aerial photographs. This is possible because fire changes the structure of tree crowns and this influences the colours in aerial photographs by spectral reflection. Included in the study are four areas, three of which burned in 2005 and one in 2006.

Dressage schooling is not a subject that rests on science, it is a matter of dependable experience. So far there hasn?t been so much research about it, but more and more is done. Especially the interaction between rider and horse is a nearly uninvestigated field. Riding skills is much about having the right position, and having the horses head and neck in different positions, but there are no research done that support or deny that this old ?knowledge? is for the best for the horse. This study was performed to evaluate if the head and neck position of the horse, and the velocity, has any influence on the position of the rider.

Tropical rain forests only cover around six percent of the world?s land area and contain around 70 % of the world´s animals and plants. Tropical rainforests have been, and still are, negatively affected by human activities. These activities lead to forest degradation which has negative impacts on production and biodiversity. Between 1970-1980 forests in Borneo, Sabah, Malaysia, was subjected to intense logging.

Lastflödesberäkningar kan användas för att se om ett nät behöver byggas ut för att tillgodose en ökad belastning, hur mycket reaktiv effekt som behöver tillföras, eller för att se om ett givet nät klarar av bortfall av en ledning. Syftet med denna rapport är att presentera teorierna för lastflödesberäkningar. Dessutom ska en manual till simuleringsprogrammet Power World färdigställas.Ledningens viktigaste förluster är genom: serieinduktans, shuntinduktans och resistans. Reaktiv effekt kan tillföras dels genom seriekondensatorer, för att motverka ledningens spänningsfall; och dels genom shuntkondensatorer för att kompensera för lastens behov av reaktiv effekt. En lindningskopplare ändrar transformatorns omsättning, vilket renderar i att spänningen i överföringsledet ändras.

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.

The purpose of this study was to investigate what attracts children to activity and movement on the playground in a central and municipal preschool in a town located in middle of Sweden. The method was to use a qualitative group interview with five children, two girls and three boys, at the age of five. The interview consisted of a general question about what kids think is fun to do on the playground and was complemented with follow-up questions depending on what the children said. A qualitative interview with a preschool teacher and observations were carried out in the hope that they would confirm what children claimed about play and movement. This study showed a gender difference when girls like to swing together while the boys are making the swinging for a contest.

The purpose of this master thesis is to implement and validate a Power System Stabilizer (PSS) to a generator at Trängslet hydropower station in Dalarna, Sweden. Problems with local rotor oscillations can occur at the hydropower station when power is transferred on a new power line (130 kV) from Northern to Southern part of Dalarna. To ensure good operation properties on this power line Fortum Generation AB and Fortum Distribution AB wants to activate a PSS on a generator.There have been investigations in which situations and what equipment that contributes to rotor oscillations. When this is known the PSS is tuned to damp these oscillations by choosing a good set of parameters. The most important parameters for good performance are to choose amount of gain and phase compensation.

My essay is an attempt to describe how complicated it can be to follow the rules and maintain boundaries without obstructing the children in their creative development. The aim is to highlight my approach and emphasize the importance of growing up in a kindergarten with standards and values which may not always coincide with their own opinion.I begin my essay with two stories about Emil five years, defying the rule of not climb up the climbing frame roof and Emma for three years, who are keen to spin on the swing, but followour rule and refrain. I wonder what it is that drives some kids to go against the rules and stretch the limits while others do not have any problem doing that we decided? I also tell about the time I as a newly-qualified nanny was rebuked by a colleague when I acted "recklessly". I would handle the situation differently today? In the last story, I praise a child for being "mischievous", which makes me proud.

Forestry affects most of the forest-covered land in Sweden. In the landscape, the most common stream type is headwaters, which are important sites for many processes and organisms in both the terrestrial and the aquatic ecosystems. The aim of this study was to investigate how the abundance of benthic invertebrate functional feeding groups in headwater streams develops after clear-cutting and if it also is possible to detect a change in the composition of feeding groups. The study also attempts to determine what factors have an effect on temporal changes in abundance of these groups. For the study, 11 sites in northern Sweden were sampled for benthic invertebrates using a Surber-sampler, and for each site canopy-cover and pH was obtained.

Reindeer husbandry and Forestry are both area related industries and will in big extent use the same lands. Conflicts often arise because of that the industries have different interests. Many of the activities done by the forestry influences the reindeer husbandry in an undesirable way, simultaneously as the reindeer husbandry activities can have negative consequences for the forestry. One such forestry activity is fertilization. It was during the 1960´s forest fertilization began to be practiced and the reason was that the increase in growth that the fertilization gave could be able to cover for the future shortage in wood many feared. During the 1970´s when the fertilizing activities were most intensive about 200 000 ha was fertilized annually.

BRP Systems utvecklar och säljer affärssystem till mindre och medelstora tjänsteföretag. Huvudsystemet är en Java Swing-applikation och för att få bättre struktur på programmet önskar man vid utvecklingen använda ett lämpligt ramverk om något sådant går att identifiera. Denna rapport undersöker två sådana ramverk.Ett ramverk kan användas som hjälp vid utvecklingen av komplexa applikationer. De fungerar som en grund till applikationen som utvecklas och kan erbjuda olika hjälpfunktioner som ofta behövs i vanliga program. Ramverk kan även få källkoden att bli mer strukturerad och lättunderhållen.

The brown bear population in Alberta, Canada has been decreasing, while the Swedish has been increasing and all the affecting parameters are not known. This study examined the difference in these populations to see if an explanation could be found in differences between the forest management. The aim of the paper was to see if stand treatments had an influence of brown bears habitat selection in autumn in Sweden and how the results can be used in Alberta. This was done by analyzing bear positions in Sweden with forest data, and comparing forest management data for the study area in Sweden with forest management data for Alberta. The results displayed that mature forests over 60 years that have been commercially thinned are selected by bears rather than forests over 60 years that have not been commercially thinned in.

Sweden?s forestry legislation was updated in 2010 and a new definition of forest land was introduced. This definition was adapted to the one used by the Food and Agriculture Organization of the United Nations (FAO) for international statistics on the state of the world's forests. It is in short based on the lands ability to grow forest that reaches 5 meters, 10 % canopy closure and has a continuous distribution, according to FAO at least 0.5 hectares. A country-wide laser scanning is now carried out for the production of a new national elevation model; the laser data also provides information on forest height and density.

Young stands in urban forests often lack a shrub layer, though shrubs play an important structural and biological role in forests. All layers interact with one another to form a multilayered stand, in which shrubs have a vital role.In this diploma thesis, theoretical models for forest dynamics are compared with four reference stands to detect factors, and principals for introduction of shrubs in young stands. In these stands four different ways of introduction were found. In one trees and shrubs were planted together at the same time. Shrubs spontaneous spread under a canopy of mature forest, in another.