Our Bachelor´s Thesis has been performed in co-operation with Bors Automation & Tool AB.Our task was to develop a servomotor powered tube cutting-machine with initial point fromtoday's hydraulic driven tube cutting machine Bors HYD 23. The purpose with the newconstruction was to achieve a more power-efficient tube cutting machine which could lowerthe power consumption, and also meet the market continued growing demand forenvironmental-conscious production.Bors Automation & Tool gave us relatively free hands in order to enable new thinking ideaswithout following their traditional constructional solutions.Our solution resulted in a construction based on a power source existing of a servomotordrivenrollerscrew, witch provides a more rational use of energy compared with the currentmethod.Bors Automation & Tool AB has decided to fabricate a prototype of Bors E 23 during theautumn of 2007, which they are planning to revile at the Tube 2008 exhibition in Düsseldorf,Germany.NOTE:Due to an agreement signed by the authors in the beginning of this project, no appendix is published at this time.If you want to wiew these documents, please contact the authors..

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.

Den här rapporten redogör för det examensarbete som utfördes på Cargotec ABsutvecklingslaboratorium i Hudiksvall våren 2012. Cargotec AB är en världsledande leverantörav lasthanteringslösningar för lokal transport, terminaler, hamnar, distributionscenter ochfartyg. I Hudiksvall tillverkas lastbilskranar för hantering av timmer och styckegods.Hudrauliska ventiler utgör en viktig del av de system de ingår i och deras egenskaper, bådestatiska och dynamiska, har en enorm betydelse för systemet som helhet. Det är därför viktigtatt kunna identifiera egenskaperna hos de ventiler som används. För att tillgodose detta behovfinns en provkrets för ventiler på Cargotecs utvecklingslaboratorium i Hudiksvall.

För att kunna erbjuda en kompaktare tiltrotator som även tillåter större vinkelutslag i tiltrörelsen har Indexator undersökt möjligheten att använda en hydraulisk vridcylinder för tiltfunktionen istället för dagens hydraulcylindrar. Målet med detta arbete har varit att presentera ett antal förslag på hur en befintlig vridcylinder kan förbättras för att erhålla 25 % högre vridmoment och på så vis bättre passa till de applikationer som Indexators produkter används i. För att göra detta har en teoretisk modell tagits fram som kan användas till att beräkna det producerade vridmomentet utifrån dess geometri, det hydrauliska trycket samt friktionen i de glidande kontakterna samt även beräknar de materialpåkänningar som uppstår i ett antal kritiska punkter i varje komponent, till exempel böjspänningen i splinetänderna och vridskjuvningen av axels godsmaterial. För att verifiera denna modell jämförs resultatet av dessa beräkningar med specificerade data för den befintliga vridcylindern och hållfasthetsberäkningarna jämförs med FE-analyser av dess ingående komponenter. I rapportens senare del genomförs även en beräkning av det totala vinkelutslag som erhålls för en given geometri.

The resting area is the most important place in the barn for the dairy cow, sometimes called the heart of the free stall system. Inadequate design of the lying area, and lack of or poor quality of bedding materials may reduce the hygiene of the stall. Poor management regarding the cleanliness of the resting area may lead to poor animal hygiene and increased bacterial growth. This in turn will lead to increased risk for environmental mastitis as well as impairing milk quality through contamination with spores. In this literature study the most commonly used bedding materials; straw, sawdust, wood shavings, clean sand, recycled sand, peat and recycled manure solids, are compared to one another with regards to their ability to resist bacterial growth. Effects of adding hydrated lime to bedding materials have also been studied. Most bacteria need humidity and prefer a quite high water activity to be able to grow.

Detta examensarbete har utförts vid Sundets avloppsreningsverk i Växjö och avhandlar rejektvattenbehandling med SBR-teknik (satsvis biologisk reningsteknik). Uppgiften har varit att ge förslag till en förbättrad rejektvattneprocess. Rejektvattnet som är mycket kväverikt behandlas med SBR-teknik. Varje sats genomgår nitrifikation och denitrifikation. Vid försök att få processen att fungera har vikten lagts vid att få en fungerande nitrifikation.

Det här rapporten är en del av mitt examensarbete för högskoleingenjörsexamen i elektroteknik vid Växjö Universitet, MSI. Arbetet är en del av ett större projekt kallat Kranstyrningsprojektet som bedrivs av Växjö Universitet, Rottne Industri med flera, vars syfte är att underlätta för förare att kontrollera den kran som finns på Rottnes skotare. För projektet har det använts en laborationskran och nu har önskemålet varit att det till kranen ska installeras ett nytt styrsystem från dSPACE. Dessutom vill man att nya givare ska sättas på kranen och kopplas till dSPACE. Man vill även ha en manual för att nya studenter ska kunna använda systemet.

The short term effect of phosphorus in sewage sludge was investigated to establish howmuch of this a farmer can grant him- or herself, if using sewage sludge as a phosphorusfertilizer. Possible differences in plant availability between sludge phosphorus precipitatedby iron, aluminum or calcium integrations were studied in a sandy soil at two pH levels.The sludges were analyzed using pot and incubation trials. As the intention was to investigategrowth limitation due to phosphorus deficiency, a soil with low phosphorus supplywas chosen as well as a low phosphorus application rate. Sludge corresponding to 12kg phosphorus per hectare was applied. Treatments fertilized by sludge were compared totreatments where 0, 6 and 12 kg phosphorus per hectare from mineral fertilizer was applied.Every treatment was replicated six times.

Old hollow trees of oak contain a large amount of wood mould. Unfortunately, these trees have in the last century been greatly reduced in numbers. It has resulted in that species that depend on these habitats, saproxylic species, have become at risk to decrease in numbers or die out regionally. Previous studies have shown that the volume of wood mould is an important factor for occurrence and population size of saproxylic organisms. The aim of the present study was to examine how the volume of wood mould varies among ash (Fraxinus excelsior), lime (Tilia sp.), maple (Acer platanoides), aspen (Populus tremula) and oak (Quercus robur).

Mathematical models possible to simulate are of great importance in order to make successful projects in the aircraft manufacturing industry. An aircraft fuel system is very complex, containing pipes, tanks, orifices, valves and pumps. The principal of this thesis is using the tool Easy5, which no longer is considered reliable enough in terms of development and support. This thesis tries to evaluate the Modelica language as a possible alternative to Easy5. To make this evaluation, the components concerned in the fuel library in Easy5 are implemented to the Modelica language.

Old hollow trees of oak contain a large amount of wood mould. Unfortunately, these trees have in the last century been greatly reduced in numbers. It has resulted in that species that depend on these habitats, saproxylic species, have become at risk to decrease in numbers or die out regionally. Previous studies have shown that the volume of wood mould is an important factor for occurrence and population size of saproxylic organisms. The aim of the present study was to examine how the volume of wood mould varies among ash (Fraxinus excelsior), lime (Tilia sp.), maple (Acer platanoides), aspen (Populus tremula) and oak (Quercus robur).

This bachelor degree project was carried out at Saab AB Service and Repair, Arboga, Sweden. The objective was to design, construct and implement a new stable and reliable method of measuring the continuous vertical displacement (height) of the military search radar PS861 mounted on a hydraulic powered elevator. The end product needs to be durable enough to be fully operational in the harsh environment of an outdoor elevator shaft and yet as accurate and precise as possible since one of its purposes is to calibrate control equipment. Previously used technique has proven not to meet any of the above mentioned properties.A prototype using a high resolution quadrature output rotary encoder has been developed, allowing a completely digital interface. This new method has been evaluated in laboratory environment where tests have been conducted regarding both reliability and validity.

Lövträd har traditionsenligt valts ut för att berika stadens grönska och barrträden har ännu inte fått samma förtroende i stadsmiljöns gator och torg. Vi var nyfikna på att undersöka om 70-talets överanvändning av barrträd och dess negativa klang dröjer sig kvar och påverkar dagens val av stadsträd. Eller kan det vara barrträdens bristande egenskaper att hantera stress som begränsar dess framfart i urbana sammanhang? Att utöka dendrofloran med en varierad sammansättning av barrträd ger ett flertal fördelar som grönska året runt och ett stabilare ekosystem. Undersökningen är avgränsad till sydvästra Skåne och behandlar arterna utifrån de geografiskt rådande förhållandena.

GIS on the Internet is a rather new phenomenon, which has evolved from the need ofdistributed geographical data. It is also a powerful tool for presenting information on theInternet. This master thesis aim to create a web based GIS application with information onlime spreading and the situation concerning acidification in the county of Kronoberg, Sweden.The web based GIS application will be used by the county administrations in Kronoberg toinform the public and the municipal authorities of current counteracting acidification activity.This report includes documentation on acidifying processes and liming activities, which arepublicised together with the web based GIS application. The web based GIS application wascreated with ArcIMS, a new program in the ESRI family of GIS programs. The programincludes a guided structure, to development of everything from a map to a complete GISapplication, including mapservice and websites.

At Forsmarks Kraftgrupp AB (FKA) forces on pipe systems due to transient flow are frequently calculated as a step to verify their structural integrity. In nuclear industries these forces are often calculated with a one dimensional thermal-hydraulic analysis-code called RELAP5. When calculations regarding more complex geometries are needed, the three dimensional code Fluent is often used. This code is highly time consuming and requires large computational power.This projects aim is to compare calculations of pressure, flow and forces carried out by RELAP5 and Fluent for an arbitrary pipe section during transient flow conditions. This has been accomplished by constructing a simple geometry for which a transient flow is simulated in both programs.