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355 Uppsatser om Expanded metal - Sida 16 av 24

Latitudinal patterns in body size of Roesel?s bush cricketMetrioptera roeselii within and outside the continuous area of its distribution

Over time, species colonize new areas naturally or through humans. The colonizers areoften few and founded populations represent only a fraction of the genetic diversityexisting in the original population. If the established population becomes isolated afterthe colonization event genetic diversity will remain low and if the population, in addition,remains small in size for an extended period this will lead to increased inbreeding andpossibly inbreeding depression. Metrioptera roeselii is a common species with awidespread distribution in continental Europe. During the last century, it has expanded tothe Scandinavian Peninsula which is separated from continental Europe by the Baltic Sea.My aim was to test the hypothesis that individuals in isolated populations in Scandinaviaincluding Denmark and the Baltic Sea islands are smaller than individuals in thecontinuous part of its distribution due to low genetic diversity and lacking incoming geneflow.

Tillverkning av mikronålar för medicinsk tillämpning

Transdermal drug delivery, besides painfulinjections with syringes, has long been associatedwith small size particle pharmaceuticals, which candiffuse through the skin. This method of drugadministration has only been applicable on a smallnumber of drugs, where active molecules are smalland delivery time should or can be long.Other drug delivery options are oral administrationand injection with hypodermic needles (ordinaryhospital syringes). In oral administration thestomach and liver tend to dissolve the drug and theeffect becomes more difficult to anticipate, anddrug delivery rates difficult to control. Hypodermicneedles are used as a mean of drug injectiondirectly into the bloodstream. This method ispainful and risks infection due to tissue damageand skin penetration.One way to get a painless non-damaging techniquewith high delivery rate that still can delivery largemolecules is to manufacture an array of microscopichollow needles and equip them with a pumping unitthat delivers the correct amount of drugs.This thesis shows the technique and possibility ofmanufacture micromachined needles using low costtechniques of Ion Track Technology (radiation ofheavy ions creates porous materials), electrolessdeposition (non-current activated wet chemistrymethod of depositing metal) and electroplating.

Hallmöbel för förskolor

I have together with Frimeko AB developed new hallway furniture for preschools. The background to the project is the fact that all the existing hallway furniture?s on the market today have a similar design and same features. None of the furniture stands out immediately. Companies who work with school furniture in general have been inspired by each other, and therefore is the collections monotonous.

Robotiserad produktionsanpassad magnetmontering för vågkraftverk

This thesis work includes studies and simulation how magnetization of the translator in a linear generator for wave power can be automated. The translator is the moving component in the generator that is "dressed" with permanent magnets. The translator is magnetized with rectangle-shaped permanent magnets that are today's strongest permanent magnet type of neodymium-iron-boron (NdFeB).Eight equivalent metal sheets are mounted around the translator. The plates have milled tracks where 106 permanent magnets per sheet are mounted. Today the assembling of the magnets is done by hand, which is a very tedious and time-consuming work.  This project presents investigations about the automation of the translator magnetization theoretically and simulation results are preformed in ABB's robot simulation software RobotStudio. Even robot-held tool was designed that enables the robot to be able to magnetize the translator in a simple manner.  The investment cost is roughly 1.5 million SEK. With an economic life-time of five years, the investment costs are estimated to 24000 SEK / month.  According to the calculations, this project is very motivated to implement, as it provides savings up to 17 000 SEK per translator which is 10.2 million SEK assuming that the robot cell is operating at full speed the whole year.According to this thesis work the result is a 4x9 meter cell with two industrial robots of the type ABB IRB6650S.The cycle time to magnetize one translator was calculated to about 10 hours.This prototype of project can possibly be implemented in a full-scale production line and performed according to the calculations and simulations presented in the report. Further work is suggested to improve the tool.Lyssna .

MOTIVERANDE SAMTAL I V?RDEN AV PATIENTER MED OBESITAS OCH ?VERVIKT I SYFTE ATT ST?DJA VIKTNEDG?GN - EN LITTERATURSTUDIE

Background: Obesity has expanded to a nationwide issue that affects millions of people. The healthcare system struggles to handle the epidemic as the problem grows. Studies show that healthcare workers have negative attitudes toward obese and overweight people and that they lack knowledge and proper tools to support this patient group. Motivational interviewing (MI) is a known technique for initiating lifestyle changes with patients. Aim: The aim is to evaluate the effectiveness of MI as a tool for weight loss and sustainable lifestyle changes for people with obesity and overweight. Method: This study uses a literature review methodology with a systematic perspective. Data is gathered and analyzed to investigate how MI affects weight loss.

INFÄSTNING AV LED-ARMATUR

The thesis was performed at the lighting company Zpecta AB. Zpecta needed to develop alternative attachment of their LED-luminaire Capella. Today Capella attaches in metal ceilings with four magnets. Zpecta got indications from their customers that there was a need for other attachments. The purpose is to determine the customer?s requirements and the interfaces that are considered for Capella.During the thesis, Capella was only on the market for testing and evaluation.The thesis was initiated to create a specification.

Nedskrivning av goodwill i svenska storbanker

Background: Sweden and the rest of the world went through the biggest financial crisis at the end of 2008 since the 1930s. The major Swedish banks have goodwill related to their acquisitions inside and outside Scandinavia. Swedbank, SEB and Nordea has acquired in the Baltic countries and Russia, however Handelsbanken has established itself in Great Britain. The crisis in the Baltic countries led that real wages fell, unemployment rose, real estate prices collapsed and the number of borrowers who had trouble repaying their loans increased rapidly. All this led to the problem of impairment of goodwill in the Swedish banks that had expanded rapidly in the Baltic countries.Aim: The aim of this study is to investigate the application of IFRS 3 in Swedish banks before, during and after the financial crisis, and to investigate the low-downs in the four majorSwedish banks in 2006-2010.Completion: The study is primarily based on the case studies by the examination of the annual reports from all banks as well as evaluation of the interviews.The authors have chosen to makea strategic choice of a small number of cases through the concentration on the impairment of goodwill in the bank sector of Sweden.Results: The result of this study is that there are problems for banks in implementation of IFRS 3 in practice because of insufficient information in the banks' financial statements.Generous estimates used in the calculation of impairment testing.

Hur miljövänlig är dagens optikerbutik, och hur miljövänlig kan den bli?

SUMMARYEnvironmental issues are currently a hot topic of debate. Studies within the optics branch have not specifically been conducted previously, so the aim of this study was to determine the extent of environmental-awareness specifically within this branch.A survey, consisting of questions relating to environmental issues, was distributed to 100 randomly-selected opticians in Sweden. Of these 100 surveys, 64 were returned and showed a varied branch-engagement for environmental issues.Results of this survey showed that opticians were best in sorting newspapers, magazines, other paper and hazardous waste. Metal and rigid plastic were not sorted to any larger extent.Choosing environmentally-safe products was not so popular and only six stores always do this. 25 shops turn off electrical machines and equipment over night; while the majority of the remaining stores leave the machines on during the night.27 stores did not know if their electrical company provided ?green electricity?.Results showed that there is a lot of work to be done in making the stores more environmentally friendly.

Konstruktion av kostnadseffektiv fläkt till härdningsugnar

Scana-Booforge is a Swedish company which specialize in heat treatment of various metal. The treatments take place in quenching ovens, where fans are used to circulate the hot air. The fans used today do not have a satisfactory lifespan. This thesis aims to develop a new design of the fans for the quenching ovens, and the goal is that the new fans will bring cost savings for Scana-Booforge.The design development process started with mapping out the environment in which the fans operate, and with analysis of the existing fan structure and damages, in order to establish the cause of failure and of short durability. The performance of the fan were also established at this stage.

Förutsättningarna för ett parallellt generation IV system vid svensk nybyggnation av kärnkraft.

A new build in the Swedish nuclear power system would entail increased re-quirements for the proposed repository, which is adapted after the reactors of today. With a fast reactor, capable of burning nuclear waste, operating in parallel with the light water reactors, the increased requirements on the repository could be reduced.In this thesis, simulations of a light water reactor and a fast reactor have been performed by using the Monte Carlo code Serpent to investigate the changes in the fuel inventory. The light water reactor in the study is a boiling water reactor and the fast reactor of the type sodium-cooled fast reactor and they have been used for three different operation scenarios.By studying the fuel composition and the results from the simulations of the three scenarios conclusions can be drawn. Conclusions regarding the change of the fuel inventory and decay heat in Clab as well as the interim storage facility and in the repository. Depending on the operation alternative the changes dif-fered significantly and especially regarding the mass of burned actinides for different fuels in the fast reactor.The lowest increase of fuel assemblies was meet when using 50 years old fuel with 20MWd/kg U burnout and 2,0 % enrichment for start up of the fast reactor and 30 years old fuel assemblies with 50MWd/kg U burnout and 4,7 % enrichment for the further operation of the reactor.The increase of the number of fuel assemblies was 3174, which is equivalent to 641tons of heavy metal.

Journalistik 2.0 : Om journalistens upplevelse av medborgarnas inverkan på tidningarnas innehåll

Title: Journalism 2.0: About the journalist's perspective on citizen participation and its influenceon the news content.Purpose: The aim with this study was to examine whether, and if so how, professional journalists experience that the production of news has changed as the media development has progressed and the citizens opportunities for active participation in this process has potentially expanded.Research questions:Does professional journalists experience that the opportunities for citizen participation in the news making-process has changed with the spread and accessibility of new media- if so, in what ways?Wheatear professional journalists experience that the relationship between themselves and their news sources has changes with the spread and accessibility of new media?What consequences can an empowerment from citizens have on the production of news and on the professional role of the journalist?Theory: This essay is based on theories about convergence, gatekeeping, agenda building, participatory journalism, news sources and the journalistic profession.Method: The survey is based on ten qualitative interviews with ten professional journalists, eight reporters and two web editors from the newspapers NWT and VF.Results: The results of this survey shows that the citizens? opportunities in influencing the production of news has partly changed. The journalists do not experience that citizen participation affects their professional role. Citizens have always had an impact on the production of news but new technology offers citizens and journalists new channels that facilitate the communication and interaction. The gatekeeping process is protecting the decision-making role of the journalist, which restrains citizen participation.

Mälarens vattennivå i ett framtida klimat

The discharge from Lake Mälaren is regulated to keep the lake water level within limits set by a water decree. Despite this, in the year 2000 the lake water level rose above the upper limit. Studies conducted at the climate modeling unit Rossby Centre at the Swedish Meteorological and Hydrological Institute (SMHI) indicate that the inflow to the lake may increase in the future. A flood in the area will, among other things, strike infrastructure and residential districts.The aim of this study was to investigate the water levels of Lake Mälaren in future climates. In addition to this possible future expansion of the lake discharge though the sluice gates in order to keep water levels below limits set by the water decree and to prevent flooding of the shoreline were discussed.

Underhållskoncept : tillståndsbaserat underhåll på smörj- och hydrauloljesystem

AbstractThis report describes our ten week long thesis work which is the last task in our education in mechanical engineering at Linköpings University. The project has been performed at Siemens Industrial Turbomachinery AB?s service department. The company which is located in Finspång produces, sells and provides service for steam and gas turbines around the world.The purpose of this project is to help Siemens develop their maintenance programs for two of the auxiliary systems which are a part of the complete steam turbine system. These are lube and control oil systems.The project is restricted to two of Siemens maintenance products, No Stop Check (NSC) and the annual Safety Inspection (SI).

Identifiering av lakbara potentiellt farliga ämnen i gummiasfalt

The main purpose of the project was to identify potential environmentally harmful substances which can be leached from rubber asphalt. A method for analysing asphalt was developed and three rubber asphalt materials were analysed after being cryogrinded. One of the materials was also tested in a road machine made for testing of asphalt paving. The particles created in the machine were analysed in the same manner as the cryogrinded asphalt materials.The asphalt materials were leached by water during 24 hours. The leachates were extracted with dichloromethane, dried with sodium sulphate and concentrated to a small volume.

Utvecklingsmöjligheter inom Due Diligence i fastighetstransaktioner

Due Diligence is today an important part of the transaction process through sales of properties and isan important process for both sellers and buyers. The process intends to review an asset before atransaction to minimize the risks associated with the acquisition by detecting weaknesses and verifythe asset's characteristics. The use of Due Diligence has become increasingly common over the pasttwenty years in the Swedish real estate market and there is no indication that this trend will decreasebut rather increase. Although there is widespread use of the process both in acquisitions ofcorporations and properties, both in Sweden and in the rest of the world, it is costly for thepurchasers and the concept is far from fully developed.This thesis aims to clarify what the real estate market thinks about the potential development of theprocess itself and the role of the actors. The main question is what opportunities exist to develop theconcept of Due Diligence in real estate transactions.

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