The main purpose of this study is to investigate how to reduce the high, and every decade raising, pre-clearance cost. The pre-clearance is today carried out with a brush saw and paid per labour hour. All small trees not suitable for pulpwood are removed to simplify the later work of the harvester. The study compares the economic results from thinning of four parcels each treated differently regarding harsh or light pre-clearance and extraction of only pulpwood, or both pulpwood and fuel wood. In this type of spruce stand the study indicates that a lighter pre-clearance, followed up with both pulpwood and a fuel wood extraction, has a much better economy than the traditional method of hard pre-clearance and only pulpwood extraction..

I dagens konfliktområden är förekomsten av minor och oexploderad ammunition(OXA) ett vanligt förekommande problem för civilbefolkning samt de militära enheter som arbetar i området för att skapa stabilitet och säkerhet. Den här uppsatsen avhandlar möjligheten att lösa eventuella problem som har att göra med förekomsten av minor och OXA i ett missionsområde utan tillgång till stödresurser i form av min- och ammunitionsröjningsteam. Uppsatsens syfte är att undersöka om det är möjligt att tillföra minröjningskompetens på gruppnivå utan att tappa ursprunglig kompetens och fokus från huvudtjänsten. Uppsatsen tar även upp vilken lägsta nivå av utbildning som krävs för att kunna röja mineringar och OXA, samt hur man når upp till det målet. Uppsatsens frågeställning har varit: Går det att inom ramen för Jägarbataljon 09 utbilda en soldat som besitter kompetensen att kunna identifiera och röja mineringar samt OXA? Om ja, vilken utrustning bör tillföras? Mina slutsatser är att det är praktiskt möjligt genom att tillföra en min- och amröjledare på bataljons nivå.

AbstractThis essay discusses different explanations and interpretations of what characterizes large areas containing clearance cairns (cairn fields). Results from the analyses show that there are different explanations about when and why cairn fields and clearance cairns occur. Explanations vary from introduction of the wooden ard in the early Bronze Age to the introduction of rational hay-making in the Roman Iron Age.  There is, anyway, relative agreement considering why and when cairn fields were abandoned. The reason suggested is an increasing pasturage with the consequence of reducing soil to poverty during the period of the Great Migration or in the Viking Age.The most likely cultivation system in cairn fields is a system consisting of both intensive and extensive characteristics. The latter coincides with the probable mobility of settlements.

The aim of the study was to map the extent of Fe, Cu, Pb, As, Zn and S contamination in the area surrounding the Nasa silver mine. The mine operated between 1635 and 1810 with some prospecting performed in 1889, and has become infamous for the gruesome ways that the indigenous people were treated during the early years of operation. This study tested three hypotheses through a geochemical survey: 1) sulfide oxidation is still active in the abandoned mine, 2) the soil downslope of the mine is contaminated by mine drainage, and 3) the stream downslope of the mine is affected in the same way. All three hypotheses were valid, as the results showed that still, >200 years after mining operations ceased, signs of the historical mining are clearly visible in the surrounding environment. Acidic conditions were discovered in surface waters close to the waste rock piles, which indicates active sulfide oxidation.

Sjöminan har sänkt och skadat mer tonnage än alla andra vapensystem till sjöss. Då medel föder motmedel har sjöminan och minröjningen följt varandra i en lång duell.Huvudsyftet med denna uppsats är att undersöka hur de svenska minröjningsförbanden utvecklas inom taktik och teknik och hur dessa komponenter förhåller sig till varandra. Uppsatsen söker även svaret på hur utvecklingen från minröjningsklass Landsort till minröjningsklass Koster skett.Med hjälp av deskriptiv metod kommer Militärstrategisk doktrin, Doktrin för marina operationer samt Försvarsmaktens läroböcker i Mineringstjänst, Minmotmedelstjänst och Minröjningstjänst att användas för att redogöra hur den marina taktiken och tekniken utvecklas som ett medel i duellen mot sjöminan.De svenska minröjningsfartygens taktiska och tekniska utveckling grundar sig på de militära basfunktionerna, ledning, verkan, skydd, rörelse, underrättelse samt uthållighet. Samtidigt utvecklas minröjningsförbanden i Försvarsmakten mot ett, både för personal och materiel, säkrare och effektivare förband..

This paper aims to investigate the connection between clearance cairns and burial cairns. From this point of view I try to answer the questions why they are built in the same area and why these two different types of cairns are so similary constructed. Further I consider different theories about mounds of fire-cracked stones..

The thesis evaluates a new kind of bearing arrangement in a traction motor that ABB hasdeveloped. Since the arrangement is designed in a new and innovative way it needs to beevaluated to see if it is safe to use. In today?s traction motors, bearings with a big internalclearance (C4-clearance) are used. The basic idea of the new arrangement is to reduce the fitsbetween the bearing and shaft/house.

Technical products are becoming more and more complex, this means that the drivers, mechanics and service personnel?s need for assistance such as the service literature is increasing. In this degree project the focus is on the technical manuals of Scania?s Workshop Manual. Today, the information in the Workshop Manual consists of collaboration between text and illustrations.

Traditionally, mining has been performed mechanically with implementation ofyesterdays (and older) data. Several mining companies have started to useautonomous technology and robotics in the production areas although the harshmining environments make it unsuitable for today's electronic equipment. Despite allthe obstacles along the way of digitization, there seems to be no end in sight as thisdevelopment continues. This thesis focuses on what the mining industry is aiming forand why the mining companies are interested in these technologies. The actors of themining industry can be found to have a vision for the future mine, a production with ahigher degree of digitization and resemblances to a factory.

After the storm Gudrun in 2005, the Swedish Transport Administration started clear-cutting of railroad corridors to reduce the risk of trees falling down on the tracks. Simultaneously, train accidents with moose and roe deer have become more frequent and the costs for consequent delays and repairs of engines are of growing concern. There is reason to assume that tree-clearance of railroad corridors may have contributed to an increase in number of accidents with moose and roe deer because the cleared areas provide attractive forage and thus may attract wildlife. The objective of my study was to investigate how clearing of trees affected the number of accidents with moose and roe deer. I compared deer-train collision frequencies before and after clearance of the selected railroads and compared these with uncleared control railroads in a BACI (before-after control-impact) approach.

AbstractThe purpose of this paper was to examine preschool teacher?s thoughts about using Manual Signs as Alternative and Augmentative Communication as an aid for children in/with communication disabilities. The method I?ve used in the survey is qualitative interview.The three interviewed preschool teachers use Manual Signs foremost for those children who have a poorly developed spoken language. Manual Signs are used as a complement to the spoken language and the preschool teachers use it to increase the children?s power of concentration.

AbstractThe purpose of the study was to examine if manual signs used as support to spoken and written language can be a god mnemonic for learning of word-pictures. I performed my study as an experiment in which I made a Memory game with word-pictures. I played the game with the children twice. The first time, we played without manual signs and the second time I used sign as a support. I observed the children and noted the words they learned to read with and without the support of manual signs.

AbstractThe purpose of the study was to examine if manual signs used as support to spoken and written language can be a god mnemonic for learning of word-pictures. I performed my study as an experiment in which I made a Memory game with word-pictures. I played the game with the children twice. The first time, we played without manual signs and the second time I used sign as a support. I observed the children and noted the words they learned to read with and without the support of manual signs.

The aim of this study was to examine the current and historic mercury(Hg) load of the lake Storjuktan due to its recent exposure to a local potential source of Hg in form of the Sulphide mine Blaikengruvan(2006) and an earlier potential sources of Hg-load, the damming of the lake(1960s). Sediments were extracted using a HTH-sampler, freeze-dried, and analyzed for tot-Hg, LOI and activity of 210Pb and compared to samples extracted prior to the opening of the mine(2006). Constant initial concentration (CIC)-dating model was used for dating the samples. Low levels of Hg (100ng/g) were found throughout the lakes sediment. The highest levels of Hg(220ng/g) was detected at a depth of 4-5cm dating back to the mid 1970:s, suggesting that increased levels of atmospheric Hg rather than damming of the lake has caused the increase of Hg.

Ensåsengruvan is a mine situated within Ljusdals municipality in central Sweden. Themine was in use from 1984 to 1991 and has since been undergoing a remediation program. Mine tailings from sulfide rich ore is a potential environmental hazard due to its tendency to cause acid waters and heavy metal leakage. Lake Ensjön is situated one kilometer from the mine area. Due to the hydrological conditions it was not expected to receive inflowing water from the mining area.