Sökresultat:
472 Uppsatser om Tunnel boring machine - Sida 12 av 32
Effekt av spädningsvätska på spermiemembranintegritet analyserad med NucleoCounter SP-100 :
This study is a part of a larger project where the aim has been to evaluate different methods to assure the quality in stallion semen, due to the fact that some stallions in horse breeding have poor semen quality. The increased use of transport semen requires new methods to ensure good semen quality.
In this part of the project the viability and concentration in fresh and cooled semen was examined with NucleoCounter SP-100. A comparison between two different commercially available semen extenders, Kenney?s and INRA 96, was made.
Utökade tillämpningsmöjligheter för turbinlösning i våtpartiet hos tissuemaskiner : Konceptförslag som möjliggör tillämpning av turbinlösning för maskiner vars banbredd är bredare än 2,9 meter
AbstractThis thesis is the final part of the Innovation and Design Engineering Programme (180 ECTS credits)at the Faculty of Health, Nature and Engineering Science at Karlstad University. The extent of thisthesis is 22.5 ECTS credits and has been performed independently by Hannes Jernberg during thespring of 2013. Metso Paper Karlstad AB is the task maker of this project, and Arvid Johansson is thecompany Representative. Metso Paper Karlstad AB is one of the world leading developer andmanufacturer of tissue paper machines.In the current situation, the company has developed and patented a power management systembased on a Cross Flow Turbine. The current construction is limited to a paper width of 2.9 meters.The company wants to take advantage of all the opportunities provided by the patents, to develop aturbine solution paper machine with a paper width that is wider than 5.5 meters, and give the abilityto manufacture paper for lower energy consumption which is an important part of the production asit is very energy intensive.Problems arise with the increasing length of the turbine, ultimately resulting in that the deflectionbecomes too big and that the momentums, due to the increased torque the turbine blades breaks.By applying the design process, this work has resulted in a number of potential solutions to theproblem.
Förbättrad vakuumtätning mot kabeln under plastextruderingsprocessen
This thesis is about developing a design that provides improved vacuum seal between a lead coating and a plastic coating during plastic extrusion processes of cables. This report is a part of the course MSGC 17 for Bachelor Engineers in mechanical engineering.The work is performed at Nexans Norway AS in Halden where they have a production of high voltage cables for sea-, and offshore industry. A problem they face is that they do not get enough good seal at the attachment to the plastic extrusion machine. They want to achieve a vacuum between a lead coating on the cable and a plastic coating of the cable for plastic extrusion, which is something they do not achieve today. The thesis is thus to come up with a design that provides better sealing against the cable.The work involves a construction part with the phases of product development processes.
SecRePac - Strimlare för hushållsförpackningar
SecRePac is a household appliance that simplifies sorting of packaging such as milk, juice and yogurt containers. By shredding the packages SecRePac reduces its volume uptake both in the home and at the recycling station. This leads to minimization of both transports to the recycling stations and truck transport for emptying the containers at the recycling station.The greenhouse effect deteriorates and becomes worse and worse leading to extreme climate changes and natural disasters such as floods as an example. Carbon dioxide emissions are the major reason for this and at least 30 percent of all these emissions come directly from transports. In the EU carbon emissions has decreased in the past few years.
Bibliotekarierna och bilderna av dem En jämförande studie
The aim of this study is to examine a number of Swedish working public librarians and compare them with some popular standard images of librarians. In this project we have been working in line with these three questions: How do the librarians describe themselves and how can the descriptions be interpreted? What images are the most common and repetitive, according to earlier research? What differences and similarities are there between the images of the librarians and the working librarians? To answer the questions we have performed seven qualitative interviews with working librarians and collected relevant literature that presents various portrayals of librarians. To interpret the interviews we have used Pierre Bourdieus theories of social space, social fields, habitus and the cultural, academic, social and the economic capitals, as well as the connection between individual taste, class and social power. The conclusions of the collected material of earlier research and the interpreted material from the interviews have been compared and discussed.
Flygfänas skog. Illustration möter rumslighet på barn och ungdomssjukhuset i Lund
Flygfänas skog is a project where illustration meets spatiality. The work is about how section 62of the Children and Youth Hospital (BUS), at Skåne University Hospital, in Lund can useillustration as a compliment to their premises. Today, the hospital has difficulties to deal with theolder children patients at the hospital in a good way because the expression that is there today,mostly only appeals to the younger patients. Previously, there has been some kind of decorationon the department and the staff thought that this is boring, is a problem in that in many placesthere are stickers of child characters posted on the walls. This and other installations that cut outletters, face off, and symbols have made sense in the department becomes fragmented, ill andchildish.
?Ibland rolig & Ibland tråkig? : En studie om elevers syn på matematikundervisning i grundskolans senare år
The purpose with this study is to gain understanding about student´s view of mathematical education, in the later years of nine-year compulsory school, and the motivation factors that can be identified when student´s gives opportunity to express their own thoughts due to the mathematical education. From experiences we have gained during the practical part of our teachers education we got the impression that student´s think that the mathematical education is boring and uninteresting. Through qualitative methods such as survey and discussions in focus group we have analyzed student´s views of mathematical education and pointed out witch motivation factors that are expressed when student´s gives opportunity to influence over their own education. The results are shown from the answers and comments that student´s gave, during the survey and focus group, and is divided into two main parts, both with focus on motivation ?Mathematics and motivation? and ?Student´s influence and motivation? and also a summery part ?Motivated for mathematical education when the student is given influence over the education?. The study showed that student´s wants to have more difference in the work methods that are used in their mathematical education such as problem solving, games, more work in groups and pairs and more use of IT. In conclusion the study also gives suggestions to other studies that can be made in the same genre as this study in the way that IT can be used in mathematical education and how student´s interest can be used in the education to gain more motivated student´s..
Flexibla fixturer i bearbetande maskiner
This thesis was conducted at Linköping University and Saab Aerostructures DPS, Linköping, and focuses on the possibilities of flexible fixturing in machining applications. The thesis is part of the research project "Koofix", which is collaboration between Linköping University and a number of companies.The thesis is aimed towards small batch production which, for Saab Aerostructures DPS, means diverse part geometry and that parts are manufactured in very small numbers, sometimes just one piece. The result of this is that expensive dedicated fixtures are made for most parts. By introducing more flexible fixturing methods to this kind of production the cost of fixtures and tooling will be reduced, and make the production more efficient.New flexible fixturing methods has been presented and evaluated through the thesis, which has resulted in three different concepts. These concepts have been the result of literature screening and study of current manufacturing process at Saab Aerostructures DPS.
Läsning är inte min grej: en undersökning av några tonårspojkars attityder till läsning
This study is about fourteen-year-old boys, who are not interested in reading. It deals with what thoughts and feelings some boys have around books, reading and libraries. Further the study investigates the boys' leisure activities and their making of identities. The study is built on interviews among twelve boys in a secondary school. The result is compared to earlier reports and research.
Användarorienterad förarsituation för bergavläsning vid fjärrstyrt skrotningsarbete
Mechanical scaling is one of the most complex operations of all in the mining process. The operators are using both hearing, sight and feel to read the rock and to know where to scale and where to leave. They say they go on gut feeling in great extent, something that comes with experience. The scaling machine is placed into the edge of unsecured and newly blasted rock to hammer off the blocks that has become loose after the blast, but not enough to fall down. It goes without sayingthat it is a risky job.
Klimatförändringarnas inverkan på dimensionerande grundvattennivå
Helsingborg has the intention to build a train tunnel south of Knutpunkten. This report investigates the hydro geological aspects of the project. Questions at issue that will be answered: 1. Which parameters affect the groundwater level? 2. How will these parameters change within 100 years considering climate changes and what will be the consequences on the groundwater level. According to SMHI climate analysis the climate can change causing increasing precipitation, temperature, and a rising sea level.
Mätstation för rullmotstånd i massiva gummihjul
This is a report that describes the entire process of design of a measuring station for rolling resistance. The report is structured with elements of Fredy Olsson's method.The report also includes a brief presentation of HGF, the company that will manufacture the machine. Requirements and preferences are set up and used in a weighting of criteria by which product suggestions are based. These suggestions are used in the evaluation to produce a final draft product. Solutions to major functions are produced by criteria?s. Component selection for all components is performed, a CAD-based model is developed and an economic analysis is set up. FMEA analysis is set up. The report ends with a brief summary, critical review and suggestions for further work..
Analys med effektivitetsbegreppet TAK : En fallstudie på Ericsson i Hudiksvall
This is a report that describes the entire process of design of a measuring station for rolling resistance. The report is structured with elements of Fredy Olsson's method.The report also includes a brief presentation of HGF, the company that will manufacture the machine. Requirements and preferences are set up and used in a weighting of criteria by which product suggestions are based. These suggestions are used in the evaluation to produce a final draft product. Solutions to major functions are produced by criteria?s. Component selection for all components is performed, a CAD-based model is developed and an economic analysis is set up. FMEA analysis is set up. The report ends with a brief summary, critical review and suggestions for further work..
En inblick i en byggmätares vardag vid LKAB:s anläggning i Kiruna
Målet med detta examensarbete var att jag skulle omvandla mina teoretiska kunskaper inom mätning till praktiska färdigheter. Resultatet blev denna skriftliga rapport, en muntlig presentation och en poster.Jag gjorde mitt examensarbete hos Svenska Mätcenter AB. Projektet hette KK4 och innefattade kulsinterverk, utfrakt och bangård på LKAB:s anläggning i Kiruna. Svenska Mätcenter AB var även utsättare nere i gruvan där LKAB drev en ny väg. Under mitt examensarbete var jag runt på alla delarna av projektet för att lära mig så mycket som möjligt.När mina fem veckors praktik var över hade jag lärt mig en hel del om mätning i allmänhet och byggmätning i synnerhet.
Investeringsförslag till slipstation för servicearbete av skruvmatare
The project ?Investment proposal for grinding station for service work of screw feeders? has been performed during the spring semester 2014 for the course Bachelor?s thesis for degree of Bachelor of science in machine engineering at Karlstad?s University. The project has been performed in cooperation with Fiber Workshop which is a service department in the company Valmet AB. Valmet AB is a company that develops and manufacture soft paper tissue machines. The screw feeder is a part that is used to feed, and squeeze out the water out of woodchips.