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1076 Uppsatser om Materials - Sida 52 av 72
Robotinteraktion på litet företag : Examensarbete Industriautomation
The division of Electricity at Uppsala University runs a project called Lysekil project, they have designed a buoy that uses the waves to create electric power from a generator attached to the bottom of the sea.Uppsala University is closely connected with the company Seabased and the university makes use of their facilities in Lysekil. When they designed the buoy issues occurred, the geometric design was flawed, brackets with a short shelf life and it is generally uneconomic.A study visit was done in Lysekil on Seabased facility. With this visit the project started, which is to improve the design of the buoy and the attachment of wires leading to the generator. In this project we have chosen to use a beam system with three beams that are attached to the buoy. Then a wire attached to a plate that sits between the beams will be leading to the generator. Two proposals for construction are created, what distinguishes them are the brackets between the beams and the buoy.From these constructions, the design that is considered most optimal for our project is chosen.All parts of the buoy have been modeled and the drawings are designed in ProEngineer software.The two constructions are compared with each other, but the whole focus is on the second and final structure. The report begins with an introduction describing Lysekil project, and a task description of our project.The project aims to produce an optimal buoy that will be easy to design, Materials restrictive with good durability and an economical solution.Wave power true function has been studied, mechanical and finite element analysis of beams, buoy and plate design.This has been presented in this report, where in the various chapters can read more about the processes. Although the relevant facts and information on this project and buoy development is included.
Återfjädring vid bockning av höghållfast stål
Svenska Aerogel AB has developed the material Quartzene® which is of the typeprecipitated silica and contains calcium - magnesium silicate ((Ca, Mg) SiO3). Thematerial is used for molecular filtration of contaminated air. Qartzene?, which is inpellet form, is porous and has a high internal surface which is a requirement for themolecular filtration. With the use of various impregnations, filtration can affect thedesired outcome.
Metallers lakningsbenägenhet hos järnsand i banvall
Detta examensarbete har utförts åt Banverket Norra Banregionen, Investeringssektionen i Luleå. Syftet med arbetet var att med hjälp av lakförsök undersöka metallers lakningsbenägenhet och miljöpåverkan hos banvallsmaterial som innehåller järnsand. Banvallarna kan vara en källa till spridning av föroreningar. De innehåller föroreningar som t ex rester från oljor, tungmetaller, bekämpningsmedel och impregneringsmedel. I banvallarna har olika typer av slagg bl.a.
Omkonstruktion av kolvlod : På uppdrag av institutionen för geologiska vetenskaper Stockholms universitet
On ocean beds around the world sinking particles of residual biomass from animals and vegetation have, over time, accumulated into thick layers of sediment. For researchers these layers of sediment contain valuable information about the earth?s past climate, information that can be used to predict future climate change and to estimate natural vs. human causes of today?s global warming.The Institute of Geosciences at Stockholm University studies sediment cores that have been acquired with an apparatus called piston corer.
En Curmansk saga Bevarandeproblematik hos takhängda tapetvåder i nygöticistisk interiör
The main purpose of this thesis has been to address the problem connected with conservation ofspecific objects in historic buildings that have a protected building status. The immaterial demandsand environmental concerns of a place of cultural significance are discussed as opposed to the welladaptedsetting of a museum, with regard to long-term preservation. In an authentic interior of acertain era, large-scale individual treatments of the objects that define it and regulations forconservation-related reasons, may not be considered a worth-while effort, as it is often the integrityof the environment as a whole that has been declared as significant. To investigate the relationshipbetween object and its context, a case study has been conducted by examination of the propertycalled ?Curmans villor?, located in the seaside community called Lysekil.
Laborativ matematik på gymnasieskolans yrkesprogram. Manipulative materials in vocational education at upper secondary school
Sammanfattning
Vårt examensarbete handlar om användandet av laborativ undervisning på gymnasiet. Syftet med vår rapport är att undersöka vad eleverna anser om att använda detta undervisningssätt inom matematiken på gymnasiet. I vår undersökning valde vi att använda oss av två olika undersökningsmetoder, en enkätundersökning och intervjuer. Enkätundersökningen gjorde vi dels för att få alla elevers synpunkter och en bred syn på deras kunskap om begreppet laborativ undervisning. Vi ville även veta vad de ansåg om laborativ undervisning i jämförelse med traditionell undervisning.
Flaskhalshantering genom materialstyrning : En fallstudie på LB-Hus
Title: Bottleneck management through Materials administration Course: 4FE05EAuthors: Mikael Karlsson and Johannes Mueller Examiner: Helena ForslundKey words: Bottleneck management, material management, process description, timber, proceduresPurpose: The objective of this study is divided into three parts, all three parts of the purpose aim for the same goal. Namely, to improve the material management so that this enables the bottleneck in the planing mill to keep a continuous flow, and thereby minimizing the risk for production stops at LB-Hus. Part. 1: Identify and analyze the material management connected to the planing mill in order to identify problem areas.Part.2: Identify improvement potential in the material management connected to the planing mill. Part.3: Suggest improvements in the material management connected to the planing mill. Theoretical framework: Process mapping, inventory accounting, balance safety, inventory availability / service levels, safety stock and reorder point, forecasting and routine descriptions.Empirical foundation: Interviews carried out at LB-House, illustrated with the help of process maps and a description of each process. Conclusions: To work with the suggestions given and to follow clear procedures in all processes would result in a more efficient inventory management, it would also present a solution to the problem regarding the planing mill being a bottle neck.Suggestions for further research: Review and map the information flow from demand to production start.
Matavfall från livsmedelsbutiker : - En analys av den kommunala hanteringen i Sverige samt en detaljstudie av förhållandena i Umeå kommun
Food waste from grocery stores - An analysis of municipal management inSweden and a detailed study of the situation in Umeå municipalityThe objective of this thesis was to analyze the municipal management of food waste fromgrocery stores in Sweden in general and in Umeå municipality in particular. Furthermore theobjective was to account for the different waste treatment methods that can be used and toevaluate them from an environmental perspective. In order to analyze the municipalmanagement a survey was sent to all of the municipalities/municipal waste companies inSweden. A general comparison of treatment methods was carried out on the basis of ascientific review and a system analysis was performed in order to compare three differenttreatment alternatives for the food waste generated in grocery stores in Umeå. The surveyshowed that the legal definition of food waste from grocery stores is unclear and variesbetween municipalities.
Projektering av en etanolfermenteringsanläggning i pilotskala med Biostilteknologi
AbstractThis degree thesis was made in cooperation with Chematur Engineering in Karlskoga.Many of the environmental issues of today are a result of the motor traffic. Consumption of fossil fuels harms our environmental through formation of carbon dioxide and other greenhouse gases. To get under control with our environmental issues it?s important to find substitutes for oil that are both cheap and environmentally friendly. Ethanol has a long history as a motor fuel and is both enviromentally friendly has a high efficiency.According to the EU commissions directives for motor fuels, 5, 75 % of all the fuels in Sweden should be renewable in 2010.
Smart plombering och märkning
The background for this degree thesis is a need to replace the existing seal used to protect equipment containing secret or sensitive equipment used by Swedish Defence. The target design should satisfy both the need for tamper evidence and reduce Life Cycle Cost. In developing a new design for a seal, additional benefits such as improved logistics support and indication of attack methods such as heat and solvents have been considered.The lack of guiding principles for end users of seals became evident during the interviews. Major concerns for the future are education of users, information about actions if a seal is broken and user liability.The design work was divided into several phases. A feasibility study was performed including investigation of theory of labels, Materials and possible technologies.
Stockholms blodbad i historieboken: En l?romedelsanalys under perioden 1869 - 1996
This thesis explores in which ways the portrayal of the event known as the Stockholm bloodbath has changed during the period 1869-1996. This is done through textbook analysis. In Sweden, history has been a school subject since the 17th century, and has throughout its history had a formative role in the Swedish school system. In the middle of the 19th century it was specifically stated that the aim was to help students nurture a sense of national pride and love of country. The aim of the study is to investigate how nationally loaded events have been portrayed in text books, as well as if and how the evolution of said textbooks reflect the evolution of the history subject as a whole.
Säkerheten Främst : en kvalitativ studie av en intern säkerhetskampanj
Titel: Säkerheten Främst ? en kvalitativ studie av Sandviks interna säkerhetskampanjNivå: C-uppsats i medie- och kommunikationsvetenskap, 15 högskolepoängFörfattare: Caroline HolmströmHandledare: Mats HyvönenExaminator: Mathias Sylwan Syfte: Syftet med uppsatsen är att studera hur de anställda på produktionsenheterna Wire Sandviken (WS) och Primary (PP) som ingår i produktområdet Wire and Heating Technology (WHT) inom affärsområdet Sandvik Materials Technology (SMT) på Sandvik har tagit emot kampanjen Säkerheten Främst samt att undersöka huruvida operatörer och flödeschefer har förslag på hur kommunikationsavdelningen vidare kan stötta säkerhetsarbetet och utveckla kampanjen. Dessa resultat diskuteras i förhållande till resultatet från en enkätundersökning vilken genomfördes 2014 vid WHT. Frågeställningar: - Hur har kampanjen Säkerheten Främst tagits emot av anställda vid produktion på WS och PP?- Hur kan kampanjen Säkerheten Främst ytterligare utvecklas? Metod: Kvalitativa, semistrukturerade intervjuer med flödeschefer och operatörer vid WS och PP. Totalt åtta respondenter vid fyra olika avdelningar.
?Svenska språket, värderingar och sociala koder?? En innehållslig idé- och argumentationsanalys av kanondebatten 2006
In this thesis, we have analyzed the Swedish debate about whether to impose a national canon, and make it compulsory in school curricula. Cecilia Wikström, a Liberal MP in Sweden, made the suggestion in July 2006, and the focus of our analysis is the subsequent debate during July and August 2006. Our Materials are polemical articles from three Swedish newspapers, which we have examined to find the main ideas and arguments behind the various standpoints. Three issues have been our main focus; first, we have analyzed which concepts of culture the various debaters have used, where we have seen a difference between an anthropological and an aesthetical concept, but, surprisingly, found that there isn?t a very strong correlation between an aesthetical concept of culture and being pro-canon, or between an anthropological concept of culture and being anti-canon.
Tillämpningar i kemiundervisningen : en studie av strategier för att presentera och synliggöra tillämpningar
The aim of this study is to investigate how and in which form students come in contact with practical applications in the upper secondary school course Chemistry B. The study is based upon the assumption that all learning is situated in a social environment. The theoretical framework is the design theory perspective, which entails an assumption that the pedagogical tools affect the knowledge content.The empiric Materials in the study are collected through three methods: textbook analysis, classroom observations and questionnaires. Two groups of students and their teachers were observed during a section of the relevant course. The textbook analysis focuses upon the same course section in the textbooks of the two groups and compares these books with the relevant section in a third textbook.
Röhnisch : En marknadsundersökning gällande klädval, lojalitet och positionering.
In light of the resent surge in globalization, and the heightened competition that follows as a result of this, there has been an increase in the importance that is placed into understanding buyer behaviour. This increase has been seen since the realization that by building strong customer relationships it is much easier to reach these through the marketing communications that are put in effect. There are also a number of upsides to enlisting the customers at an early stage in product development, such as creating greater value and a stronger sense of involvement.Röhnisch is therefore trying to show a genuine interest in supplying the costumers needs as they adapt and evolve. In order to accomplish this strive towards gaining a deeper understanding into the thoughts and attitudes that precedes the buying behaviour they conduct regular surveys. To complement this, the purpose of this paper will be to determine the actual preferences and buying behaviour of the market segment that Röhnisch has chosen for themselves, and while doing so, keeping an emphasis on loyalty.