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551 Uppsatser om Mechanical rock excavation - Sida 17 av 37
Effektivisering av pulverlackeringslinje med inriktning på fixturer
The project has been oriented for development of fixtures to ateljé Lyktan to
provide a more efficiency line. In the year 2012 the company invested in a new
coating booth, which leads to opportunities to upgrading the fixtures and also
new design. The request is to minimize the area for storage of fixtures, and
therefore should fixtures be designed to apply as many articles as possible
The priority of products that fixtures have development to has been products
that are most frequently coated and new products that don?t have any fixtures.
The product families that the project has been having focus on is TIME and
FOVEA with RONDO.
In the developing of fixtures have ideas been discussed with the staff, and
instructions were made about how you are suppose to hang up the different
products.
Utveckling av 22 : -en motkolvs HCCI motor
Environment friendly transports are one of the main topics in the industry and society today.Shell organizes an annual university competition called Shell Eco Marathon. The goal is to buildthe car that consumes the least fuel during a race. KTH participated for the first time in 2006.The engine for this competition, DoubleTwo, has been developed within the school. Theprinciple is a two stroke counter piston HCCI engine with variable compression ratio. HCCIstands for homogenous charge compression ignition.
Legionella i tappvattensystem. Förekomst och förebyggnade-en redogörelse.
Legionella can be prevented, the question is how. This report is a degree in construction engineering education at Chalmers University in Gothenburg. A comprehensive written publication for Legionella-safe plumbing installations is not available and therefore requested. The purpose of this report is to present preventative measures against Legionella bacteria growth in tap water and in other systems where Legionella bacteria are a potential problem. Technical solutions are presented including how different systems function and what their advantages and disadvantages are.
Analys av salvcykeln vid ortdrivning i Kiirunavaaragruvan
Gellivare hard rock research (GHRR) bedriver projektet ?Snabbare och bättre tunneldrivning? i samarbete med bland annat Luossavaara Kiirunavaara AB (LKAB), där målet är att förbättra utförandet av varje enskild aktivitet i salvcykeln. Projektarbetet utförs enligt Demings förbättringscykel, PDSA-cykeln. I etapp ett har en detaljerad problemidentifikation av aktiviteterna i salvcykeln genomförts. Problemen har prioriterats och förslag till lösningar har utarbetats.
Man blir påverkad av sitt kön vare sig man vill eller inte : En kvalitativ studie om skillnader i män och kvinnors musikpreferenser
Music has always been an important form of communication and it can be found in many different contexts including aesthetical, cultural and emotional forms. In the globalized society of today music can be distributed fast through radio, TV, CD: s and the Internet. For many people consumption of music is an important part of the daily life and it can contribute to shape an individual?s attitudes and personality.The main purpose of this study is to find out whether there are any differences between men and women?s musical preferences. I will apply an explorative approach using qualitative interviews to describe what causes the differences.
Erosionsskydd i strandzoner :
Erosion in coastal areas is a common problem all around the world. The range of the problem depends on several factors, i.e. type of bed-rock and soil, wind and wave climate. Another factor is whether the area is of high interest, i.e. if the area is important for tourism and recreation, if there are houses and other buildings close to the shoreline or if it is a site of special scientific interest.
Optimering av blekeriet i CTMP-linjen vid Rottneros Bruk
At Rottneros pulp mill mechanical pulp is bleached with hydrogen peroxide. The changes of bleaching chemicals that are used for different grades are taken from bleaching tables; however these tables are old and need to be updated. The purpose of this thesis was to be the basis of new documentation.In this thesis three pulps where studied with the aim to find the optimal bleaching chemical changes (total NaOH/VP-quote) for each pulp. The pulps were taken from the filter before the bleaching tower and the pulps were bleached in the lab. The most important pulp property in this study was the brightness and how that was influenced by the chemical dosages.
Key Success Factors i projekt inom Entertainment, En fallstudie av HippHipp! [paw rihk-titt]
Syftet är att beskriva ett projekt inom Entertainment och identifiera dess Key Success Factors. En fallstudie gjordes av privatteaterproduktionen HippHipp! [paw rihk-titt] som gavs i Lund 2003-2004. I en induktiv studie genomfördes nio stycken intervjuer som resulterade i ett empiriskt material. Detta material analyserades och relaterades till teorier om projektledning (Briner m fl), adhocrati (Mintzberg), Key Success Factors (Grant) och Experience Economy (Pine & Gilmore). Studien beskriver ett framgångsrikt projekt inom Entertainment och förklarar framgången med projektet genom att presentera sex stycken Key Success Factors.
Utveckling av styrning till solföljande MaReCo-hybrid i Hammarby Sjöstad
Turning solar collectors, heliostats, is certainly not a new idea but has been explored for at least two decades. Projects on this subject have resulted in more or less realistic constructions, in a commercial point of view. Far too often the technical goals have had higher priority than the economical, which has resulted in a few constructions having the ability to compete with conventional, fix solar collectors. The economical issues have been given high priority in this project, without decreasing the demands on reliability. The system has been given the following mechanical and electronical properties: One-axis movement, fix heat carrying fluid system, microcomputer controlled movement and automatic protection from overheating.
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.
Reglering av naturgasdistributörer : En undersökning av benchmarking på marknaden för naturgasdistribution
This paper discusses the advantages and disadvantages of using different benchmarking models to measure and compare the efficiency of Swedish gas distributors. It also discusses to which extent the results of a benchmarking study should influence the revenue-cap which will be implemented in the gas distribution sector in Sweden from year 2011. The discussion is based on arguments from both theory and practical applications of benchmarking. The results suggest that benchmarking Swedish gas distributors against distributors in another country using a parametric model is most favorable, but the reliability will be increased if non-parametric models are used also. Partial and total productivity measures could be used to confirm results of other benchmarking analyses.
Porträtt av personer med funktionsnedsättningar : - En kvantitativ och kvalitativ undersökning om den bild SVT:s respektive TV4:s nyhetsinslag skapar av personer med funktionsnedsättningar
The study has answered the questions to what extent people with disabilities are involved in SVT- and TV4- news reports and how people with disabilities are represented in news reports. The material is based on 140 news items.The study has demonstrated that news reports SVT and TV4 have different grades of misconceptions about disabled people. Disabled people are constantly being reinforced by negative disabling terms, the disability being of central importance for the news broadcast and they still occur in stereotypical depictions. Through the image of disabled people forms the bed-rock on which the attitudes towards, assumptions and expectations of disabled people are based on. They are fundamental to discrimination and exploitation that people with disabilities face on a daily basis, and contributes significantly to their systematic exclusion from mainstream society.
Identifiering av synkronmaskinsmodell genom SSFR-test
At the Division of Electricity at Uppsala University there is an experimental rig forhydroelectric generators. The experimental rig?s vital part is a 12-pole synchronousmachine, whose electrical characterizing parameters (resistances, inductances andtime constants) are unknown. The aim of this thesis is to characterize the machine inits current state by perform a Standstill Frequency Response (SSFR) test. From theanalysis of the measurement data, which is a part of the test, a set of basic parametershave been received.
Arbetsmiljöarbete enligt OHSAS 18001 : En inledande undersökning
There are regulations in sweden that require organizations to manage occupational, health and safetey (OH&S) issues in a systematic way. The contents of the management system vary depending of the activity of the specific organisation. An accurate management system is crucial in order to assure that rules and regulations are fullfilled. The OHSAS 18001 standard covering OH&S management is intended to provide organizations with the elements of an efficient OH&S management system. The work with this thesis was done at Swemat AB in Härnösand wich is a mechanical industry. In the thesis, the requirements of the OHSAS standard are compared with the current management system.
Vibrationsisolering av gruvmaskinshytt
Detta examensarbete, på uppdrag av Atlas Copco Rock Drills AB, syftar till att kartlägga de problem gällande vibrationer som finns och uppstår vid användandet av produkten Scaletec MC och komma med förslag till lösningar på ett nytt system som bättre hanterar vibrationer än det befintliga. Lösningarna är avgränsade till hytten och hyttens koppling mot ramen. Kartläggningen av Scaletec MC visade att den största problemskaparen är den långa bommen med den tunga hydraulhammaren framtill. Den skapar rörelse i hytten både vid skrotning och vid transport. Vid transport är även den odämpade stolen, de ojämna vägarna och det faktum att axlarna är stela ett stort problem som genererar helkroppsvibrationer hos operatören.