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345 Uppsatser om Laser Cutting - Sida 18 av 23

Vi som inte fruktar döden : skildringen av samurajklassens hederskodex under Meijikejsarens styre i Den siste samurajen

This essay deals with the political upheavals which occurred in Japan with the Meiji Restoration of 1868 and its impact on the Samurai Class. This transitional period in Japanese history is portrayed in the film The Last Samurai from 2003, and it's the comparison between this Hollywood production and the current research on the subject on which this essay focuses. Two key figures who are portrayed in the film are Nathan Algren (Tom Cruise), an American soldier from the Indian Wars of the 1860/70s who travels to Japan to quell the Samurai rebellion but ends up in captivity; only to learn their codex of honor and way of life and eventually become a Samurai himself. The other character calls himself Katsumoto (Ken Watanabe) and becomes the representative of the Samurai's struggle for their existence. Their friendship and cultural exchanges will remain a cornerstone throughout the film.

Återvinning av näringsämnen från hushållsspillvatten med omvänd osmos

Hammarby Sjöstad is a new district in Stockholm with high environmental standard. Stockholm Water Company evaluates a local wastewater treatment plant with cutting edge technology. The first step is an experimental treatment plant (Sjöstadsverket) with four parallel lines of treatment, each with a capacity to treat wastewater from 150 persons. Within the membrane technology subproject the possibility of using reverse osmosis (usually called RO) to regain nutrients is examined.Reverse osmosis separates the incoming water in a clean permeate and a concentrate that, as the name indicates, is a more concentrated version of the incoming water. Using this method in wastewater treatment, a solution high in nutrients can be obtained without the use of chemical precipitation agent and with no production of sludge.

Studie av en medeltida husgrund : en analys av bronsfynd från husgrund 6, Västergarn, Gotland

This essay is an analysis of the objects made of bronze found in an excavation Västergarn parish, Gotland, in 2010, conducted by the University of Gotland. The studied material presented in this essay comes from contexts inside, as well as nearby the foundation of a medieval building which purpose is still not certain. The first purpose of this study is to present the bronze-objects found inside and nearby the foundation of house 6, and to see if there are any datable objects. There is also a discussion whether there has been any bronze-crafting in the area. The second purpose is to make a contextual analysis to see if there are any differences between the material found outside and inside of the building, and what conclusions can be made regarding the function and use of the building.

Produktivitet och kvalitet vid stickvägs- respektive beståndsgående förstagallring :

Nowadays the majority of the thinnings made in Swedish forests are done by machines, harvesters and forwarders. The most common model in thinning with a harvester is strip-road operated thinning and stand-operated thinning with one intermediate passage between the strip-roads. This study is a time study with some quality follow ups on a strip-road operated thinning model, a stand-operated thinning model with one intermediate passage between the strip-roads and a stand-operated thinning model with two intermediate passages between the strip-roads. The machines in the study were a small harvester (Forestline MPM C90) and a medium sized forwarder (Timberjack 1110). The study was made in Litsnäset outside the city of Östersund in Sweden and was made during the autumn 2007. In a lodgepole pine stand six study units (0,6 ha) were thinned with the three different models, two study units per model.

Hur skall skogen skötas? ? en analys av skogsfastigheten Fagerdal 2:10 i Jämtland

The forest property Fagerdal 2:10 was donated to the Swedish University of Agriculture in 1995 by Erik Rönnberg. The dominating species is Norwegian spruce (Picea Abies) and the average age is high due to selective cutting. The aim of this study has been to analyze how the forest on the property should be managed and demonstrate how a better estimated forest data affects the future management. The impact of the management on the carbon stock of the property was also examined. A forestry plan established in 2009 by Skogssällskapet was used as a basis for the analyses.

Utvärdering av möjligheten att tillvarata energi ur processvatten : En undersökning gjort vid Olofsfors AB på uppdrag av UMIA AB.

The company Olofsfors AB manufactures drive belts for forest machinery, known as ECO-Tracks, and abrasion-resistant steel and cutting edges for graders, excavators and tractors, known as Bruxite and SharqEdges. Manufacturing these products requires the steel to be heated and molded, then submerged in water and hardened. The water used in the hardening of steel is pumped to the process from pits below the floor and then pumped back to the pit after it?s been used. Since the temperature of this water rises after being used to harden the steel the temperature of the pumping pit needs to be adjusted to maintain its setpoint of 21°C.

Frigörelse av kvicksilver och metylkvicksilver till bäckvatten under olika perioder efter skogsavverkning :

High levels of Hg in fish in Swedish lakes have been a problem along time in Sweden. The major concern is production and accumulation of the most toxic form of mercury; methyl mercury (MeHg). Consequently, in about half of our 83 000 lakes fish contain concentrations above the recommended limit for human consumption of 0,5 mg mercury per kg fresh weight (most of it in the form of MeHg). Consumption of fish containing too high levels of MeHg may cause problems for both humans and animals. Three major sources of MeHg in surface waters are: 1) runoff from terrestrial areas, 2) deposition from the atmosphere, and 3) internal production of MeHg in lakes and streams. The aim of this study was to investigate the effect of clear-cutting on the concentration of Hg and MeHg into draining streams.

Avfuktning för återanvändning av processluft

Sammanfattning Projektet som genomförts på uppdrag av och i samarbete med företaget ABB-I-R har innefattat att finna och dimensionera en befintlig avfuktningsenhet tillgänglig på marknaden, eventuellt med viss erforderlig anpassning och modifikation. Vidare har uppgiften innefattat att konstruera en applikation till basenhet Cutting-box Original IV. Slutligen ingick även testkörning och intrimning av framtaget lösningskoncept som en del i uppgiften. Principkonstruktion: Första konstruktionsetappen s.k. principkonstruktion inleds med en, enligt Fredy Olssons modell för produktutveckling, framtagen strukturerad uppgiftsutredning och problemställningsanalys.

Urskogen med de stämpelbleckade gammeltallarna : en skogshistorisk tolkning av Brännlidens naturreservat

People have used forest resources in northern Sweden for different purposes. Before the 20th century the forest was used for many different reasons, but during the past 200 years it has become an industrial raw material. The presence of people in the forest has left different kinds of traces in the forests. One example is culturally modified trees (CMT´s). The aim of this study was to study and document how people have used the forest resources during the last centuries in Brännlidens nature reserve, and what kind of traces this land use has left.

Simulering av översvämningar i Nedre Dalälven

Mosquitoes are found in extremely large numbers in the lower parts of the River Dalälven. In the year 2000 the mosquito nuisance was especially high, resulting in foundation of the Biological mosquito control project. Since 2001 mosquito larvae are controlled by using a biological pesticide BTI (Bacillus thuringiensis ssp israelensis). The mosquito fauna in the area is dominated by flood water mosquitoes, a group of mosquitoes that are very aggressive and form new generations of mosquitoes during every single flooding event during the summer. To be able to efficiently control the mosquitoes it is essential to know the extension and locality of the flooding.

Grundvattenavsänkning vid tunnelbyggnad ? tillämpning Förbifart Stockholm.

Phosphate is a used as a surface treatment method which is used for various purposes in the industry. In this case, phosphate coated wire is used in the processes to achieve a desirable outcome. The reason to why phosphate coated wire is used in the production process is because phosphate acts as an accumulator, where it stabilizes the lubricant on the surface of the wire. Lubrication is important because it plays a major role in the roll quality and characterizes important benefits regarding the outcome.Currently, SKF has to wash away all phosphates residues after extrusion process in an operation called tumbling. The main reason for this is simply because the surface has to be completely free from lubricants and coatings till the next step of process.

Västlänken Analys ur ett tekniskt och ekonomiskt perspektiv.

Phosphate is a used as a surface treatment method which is used for various purposes in the industry. In this case, phosphate coated wire is used in the processes to achieve a desirable outcome. The reason to why phosphate coated wire is used in the production process is because phosphate acts as an accumulator, where it stabilizes the lubricant on the surface of the wire. Lubrication is important because it plays a major role in the roll quality and characterizes important benefits regarding the outcome.Currently, SKF has to wash away all phosphates residues after extrusion process in an operation called tumbling. The main reason for this is simply because the surface has to be completely free from lubricants and coatings till the next step of process.

Avfuktning för återanvändning av processluft

Sammanfattning Projektet som genomförts på uppdrag av och i samarbete med företaget ABB-I-R har innefattat att finna och dimensionera en befintlig avfuktningsenhet tillgänglig på marknaden, eventuellt med viss erforderlig anpassning och modifikation. Vidare har uppgiften innefattat att konstruera en applikation till basenhet Cutting-box Original IV. Slutligen ingick även testkörning och intrimning av framtaget lösningskoncept som en del i uppgiften. Principkonstruktion: Första konstruktionsetappen s.k. principkonstruktion inleds med en, enligt Fredy Olssons modell för produktutveckling, framtagen strukturerad uppgiftsutredning och problemställningsanalys. Denna beaktar såväl produktens förhållning till process, omgivning, människa och ekonomi, som sin egen tekniska livscykel uppdelad i etapperna alstring, framställning, avyttring och eliminering.

BIM inom ROT-projekt

Användingen av virtuellt byggande och byggnadsinformationsmodeller inom byggbranschen ökar ständigt och är ett område som varit föremål för flera studier under de senaste åren. I flertalet av dessa har dock fokus legat på nyproduktion. Men i och med ett ökande renoveringsbehov i stora delar av det svenska bostadsbeståndet ökar även intresset av att använda BIM inom ROT-projekt. Dessutom har ny teknik inom området inmätning, då främst laserscanning, gjort att det idag finns lämpliga verktyg för att skapa byggnadsinformationsmodeller av befintliga byggnader.Målet med denna studie har följaktligen varit att undersöka hur en BIM av en befintlig byggnad kan tas fram och hur denna kan användas inom ett ROT-projekt.Resultaten som redovisas i denna studie bygger dels på en kartläggning av olika metoder för inmätning och dels på en sammanställning av erfarenheter från olika personer som arbetat med antingen inmätning eller arbetat i ROT-projekt där digitala 3D-modeller använts på ett eller annat sätt. Kartläggningen av de olika inmätningsmetoderna genomfördes främst genom en litteraturstudie medan insamlingen av erfarenheter genomfördes i form av en intervjustudie.De slutsatser som har kunnat dras utifrån resultaten visar att det finns en rad olika nyttor med att använda sig av BIM även inom ROT-projekt.

Färsk ved till Hallstaviks pappersbruk :

Hallstaviks papermill is an industry plant within Holmen Paper. Hallstavik is a mechanical mill and produce newspaper and journal paper. During year 2000, Hallstavik used approximate 1.200 m3f spruce, either as logs or chips from sawmills. Due to that the production is running continuously the mill also needs raw material at the same rate. At some periods the supply of raw material cannot keep up pace.

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