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4155 Uppsatser om Mechanical engineering - general - Sida 17 av 277
Epoxidised linseed oil as hydrophobic substance for wood protection : technology of treatment and properties of modified wood
Public concern about the release of toxic compounds from wood-based products drives legislation towards enforcing industries to find and use more sustainable solutions for wood treatment. Plant oils are good alternatives to treat wood, minimizing or even neutralizing the impact on the environment. Wood modification with epoxidised linseed oil (ELO) and acetic acid as catalyst has proven a suitable method to impregnate and protect wood. However, the mixture presents a serious inconvenience because of the quick polymerization of the ingredients that limits its practical application. Therefore, this study was designed to evaluate an alternative method using a two-step process which bypassed the problem above.
Kulturpolitiska tendenser i en nybildad region En studie av Västra Götalandsregionen
The role of cultural policy within the general political planning of a community can vary both historically and regionally. The aim of this study has been to explore the cultural policy plans, during the 1990's, in the recently formed geographical region of "Västra Götaland". This is a qualitative study, carried out during 1999, and based upon structured interviews with five representatives of the cultural-policy sector in the "Västra Götaland" region. In order to identify connections and tendencies in a more general social context the aims of the five representatives regarding cultural policy have been explored from the perspective of three cultural policy paradigms, namely Dorte Skot-Hansen, Olav R. Spilling and Göran Nylöf.
Fel i produktionen : En studie om uppkomna fel i två anläggningsprojekt
AbstractThe purpose of this study was to identify problems that may occur in the execution of a civil engineering project and suggest measures to reduce the risk of errors. The study was conducted in cooperation with a civil engineering company in the Gothenburg area. During two weeks in February 2012, a field study took place on two construction sites where disruption and problems that took more than 15 minutes to correct were noted. During the field study we identified 39 such occurrences in the projects and then these were classified into different categories according to their cause.The two largest categories were "Design" and "Planning", which accounted for half of the errors that were discovered.In the study results were evaluated to decide whether it was possible to detect discrepancies at an earlier stage. The cost to fix an error in the design stage may be significantly less than to correct the problem in production.According to the evaluation, 55% of the errors could have been detected earlier if there was a greater degree of observation for such issues by everyone involved in the project.
Hur kan erfarenheter från olycksundersökningar nyttiggöras på lokal nivå samhället? - utifrån ett MTO-R (Människa, teknik, organisation och riskhantering) perspektiv
The theme in this report has been how to benefit experience from accident investigations. The demand on the municipality to perform accidet investigations is relatively new, and maybe they aren?t clear what the demands means. This causes that there might be a problem to benefit experience from accident investigations, for improving the overall safety in the municipality. The main purpose of this report has been to clarify how experience from accident investigations, can be of benefit to society on a local level.
Produktutveckling av klämskydd
Abstrakt
Klämning mellan dörrblad och dörrkarm är en frekvent förekommande olyckstyp som
drabbar såväl barn som vuxna i alla åldrar. I genomsnitt drabbas var fjärde
svensk någon gång under sin livstid av så pass allvarliga skador till följd av
klämning i dörr, att sjukhusvård krävs. Som regel är det handens fingrar som
skadas.
På marknaden finns ett stort utbud av tekniska lösningar som i någon mån syftar
till att förhindra klämskador i kontakt med dörrar. Dock är de flesta av dessa
lösningar utformade för dörrens gångjärnssida. För dörrbladets låssida
existerar inget klämskydd som kan göra anspråk på att vara heltäckande.
Innovativt Drivpaket för Rullstol
This is a thesis for a Bachelor Degree Project, performed in the subject MechanicalEngineering. The students Roger Malmberg and Simon Hagberg have carried out adesign project on behalf of the recently established company J&D Assisting systems,located in Halmstad.The project consisted in developing J&D's first prototype of a power assisting solutionfor wheelchairs. A power assisted wheelchair combines human power, which is deliveredby the arms through the pushrims, with electrical motors, which are powered by a battery.The power assisted wheelchair is aimed at customers, who have used a regularwheelchair for a long time, but who have become weaker or just need additional powerwhen driving uphill. This kind of wheelchair will provide additional power for users,which will spare their wrists, elbow and shoulders. The product is torque sensor free andinstead it relies on the velocity.
Utveckling av säte till kulventil SKV
This report contains a degree project made by the mechanical engineering students Lennart Andersson and Daniel Jansson. The project has performed in assignment by SOMAS Valves AB in Säffle. SOMAS are leading in development on control and on/off valves. To maintain this position they always want to improve their products. One way in this development is valves that are more tightened.The purpose with our project was to investigate another seat design on a HiCo (High Cobalt Alloy) seat to a SKV 150 PN 25 valve and compare this to an original HiCo seat.By modifying the seat on a ball valve we want to achieve a valve that leaks lesser then a valve whit original seat.
Identifiering av problem och möjligheter i RE-processen : med avseende på intressenterna
Examensarbetets problemområde återfinns i den tidiga delen inom informationssystemutveckling. Denna utvecklingsfas, kallad Requirements Engineering (RE), innefattar aktiviteter för att förstå, dokumentera och validera de behov och krav som föreligger för ett framtida informationssystem. RE är en avgörande aktivitet i processen att utveckla ett informationssystem som tillfredsställer användare och kunders förväntningar och behov.De olika intressenterna som är involverade i RE-processen har olika roller, bakgrund och kunskaper. Av denna anledning föreligger olika problem och möjligheter med avseende på intressenterna. I examensarbetet utreds vilka dessa möjligheter och problem kan vara.
"Vattnet är slut!" : En studie om hur kriskommunikationen fungerade mellan involverade aktörer under vattenläckan i Kalmar 17-18 december, 2010
Introduction:During a crisis in the society, the communication from the responsible authorities is of big importance. This study shows how the authorities worked with their crisis communication towards the general public during the waterleak in Kalmar in december, 2010.Purpose:The purpose of this study is to investigate how the responsible authorities in Kalmar worked with their crisis communication during the waterleak and also how the general public perceived the crisis communication.Methodology:The study is based on a combination of a qualitative and a quantitative methodology. We begin to work with qualitative interviews with the responsible authorities to get information about the actual event and their work with the crisis communication towards the general public through the mass media. Then we investigate how the general public in Kalmar perceived the crisis communication from the responsible authorities and compare these two results.Conclusion:The study shows that there were several problems, both internally and externally, with the crisis communication from the responsible authorities during the waterleak. Although some people were dissatisified with the responsible authorities crisis communication, the majority were pleased and very satisfied with the information they got from the responsible authorities during the waterleak..
Möjligheter till reduktion av ljud från kuggväxel i markvibrator
Bakgrunden till projektet är ett examensarbete initierat av Metso Dynapac.
Företaget tillverkar maskiner för utläggning och packning av beläggnings-
och fyllnadsmaterial, t.ex. vid asfaltering. En av de maskiner som företaget
tillverkar är en markvibrator, vilken har problem med buller. En ingående
komponent i maskinen består av en kuggväxel. Kuggväxeln bedöms av företaget
vara en av källorna till buller, vilket fastställts genom mätningar.
Pga.
Studie av sambandet mellan räddningstjänstens förebyggande insatser och anlagda skolbränder : analys av behovet av stöd och vägledning
The purpose of this report is to study the relationship between the rescue service fire prevention activities and the number of arson fires in schools. An objective of the project is also to investi-gate the need of developing national methods for fire prevention. The results are based on a questionnaire study among 35 fire departments and further interviews with five of them. The results indicate that there is a relationship between the rescue service fire prevention activities and the number of arson fires in schools. The relationship is positive in the sense that arson fires in schools decrease with increasing prevention activities.
Utvecklingen av mekatronikämnet på KTH : ? anställningsbarhet, forskning och innovation
This thesis examines history of the subject of mechatronics and innovation. The main reason tostudy mechatronics from a historical point of view is that it has never been done to a greater extent before. An overview is justified because various definitions have been used over the decades, but nowadays the subject has become more established. Focus in this thesis is mainly on development of the subject of mechatronics at Royal Institute of Technology in Stockholm. Innovation is the other aspect of this thesis.
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.
Interaktivt konsultverktyg -vid utveckling av webbplatser
Denna rapport handlar om ett examensarbete utfört åt multimediaföretaget Animero. Det är ett litet företag med åtta anställda som jobbar med olika multimediaproduktioner med fokus på webb- och videoproduktion. Problemet för Animero var att det saknades en ordentlig kravspecifikation i projekten och att kunderna brukade utgå ifrån vad de själva tycker om istället för att tänka på dem som ska besöka webbplatsen. Vårt uppdrag blev att utveckla en applikation som ska ta fram underlag till en kravspecifikation vid beställning av webbplatser. Applikationen ska samla in information om kundernas målgrupp, deras företagsidentitet och de funktioner de vill ha med på webbplatsen.
Användarinvolvering i ett systemutvecklingsprojekt -Är det effektivt?
In most software engineering project, users are only involved in the beginning of the project as a help to design the requirements specification but users can be involved after this phase too, but is it effective to do so? With this report we would like to investigate how effective it is to involve users after the requirements specification has been written and approved. To find out how effective it is to involve the users we try some fast and simple involvement techniques on a quite far gone project. These techniques include ethnographic studies, prototypes and surveys. We also interviewed a couple of people who work with usability and finally delivered a report with our results to them to find out if they found our result relevant.