This bachelor thesis is about an ultrasonic sensor, implemented in a bubble chamber in Artis. The sensor consists of the piezoelectric sensor and an electronic control circuit. The control circuit consists of a programmable microprocessor, PIC18F2420 and a circuit, which sends the excitation signal to the piezoelectric sensor, and later receives the echo. This bachelor thesis consists also of a theoretical study, which examines different techniques of liquid level sensing in a chamber. The study discusses which factors are important in liquid level sensing and examine accepted methods.

In this thesis work a Geographical Information System (GIS) based methodology to identify locations suitable for the installation of wave energy converters has been developed. Parameters of importance have been identified and a GIS-database has been set up, containing data about the marine environment. In a case study of the Swedish west coast the methodology has been applied, resulting in a number of maps showing possible areas. The results show that large areas are suitable for installation of wave energy converters, from a technical and economical point of view. When consideration is taken to other interests in the area, such as navigation, fishing and environmental protection, the size of the suitable area diminishes considerably.

I ett marint framdrivningssystem byggt av Rolls-Royce Marine i Kristinehamn, kallat POD Propulsion - MermaidTM, kyls systemets yttre delar med fo?rbistro?mmande vatten. Det kylande vattnet kompletteras av ett internt luftkylningssystem vilket, till fo?ljd av en la?gre kylningskapacitet a?n fo?r det externa vattnet, fo?rorsakar en otillra?cklig kylning i den sektor av elmotorns stator vars periferi kyls av kylluftsstro?mmen. En andel av statorn a?r sa?ledes enbart luftkyld vilket medfo?r att den axiella temperaturen i denna sektor uppna?r ett lokalt maximum, kallad ?hotspot?, vilken a?r ho?gre a?n fo?r resten av elmotorns stator.Avsaknaden av en tangentiellt uniform temperatur i statorn medfo?r begra?nsningar vid dimensionering av framdrivningssystemet.

This major project in Building Engineering has its focus on inquiring into what methods has been used in the planning process of the residential buildingLjusbojen 1. This project has been conducted in cooperation with Kadesjös Ingenjörsbyrå AB, an engineering contractor firm which also acts as the property developer. Initially several different general methods for planning residential buildings have been presented. After the methods from the process of building Ljusbojen 1 has been analyzed compared to the general methods presented in part 1. This shows what the determining factors are during the planning process; factors such as cost, quality, time management, know-how and environmental issues.

This report is a bachelor thesis work in the field of product development and design. The assignment has been to develop a solution for roof racks, normally used for cars, to fit on the open trailer models FS1425 and Alugance. The project was implemented by Johan Andersson and Victor Karlsson, students at the Mechanical Engineering program with a focus on product development and design at Jo?nko?ping?s school of Engineering, in spring 2012.The client wants to use transport solutions in the same way as roof racks on cars. The user of such a product is assumed to desire simplicity, safety and an attractive design with an appealing price, which has been a challenge during the thesis work.Pre-studies have been conducted to examine the potential competitors and gain knowledge in the research area.

The purpose of this work is to find out if the suctionvalve to the salivaejector for dental equipment in a simple way can be improved or if a new design is needed. The result of the examination of the suctionvalve shows that the friction between the piston and the seal is high and that this causes the valve in a few cases sheaves. The study concluded that only small changes in material or detail, improve the component..

Denna uppsats beskriver Internet i Kina i allmänhet, från dess politiska bakgrundsmotiv och inledande grunder till dess nuvarande tillstånd av dynamisk ekonomisk infrastruktur och medel för folkligt politiskt inflytande. Tonvikten läggs vid för Kina unika aspekter, såsom partiinflytande över informationsutbytet, folkliga attityder till fildelning i ett samhälle som bara nyligen erkänt privat ägande samt effekter av kulturkrockar på nätet mellan västlig och kinesisk civilisation. Det argumenteras för att Kina i en framtid kommer att ha ett stort inflytande över cybermarknader och i beslutsfattande om Internets framtida utveckling, genom tekniska, ekonomiska och politiska medel. Slutligen resoneras att Internet i Kina har förändrat och kommer att förändra folkets mentalitet, så att det anammar västerländska tankemönster i liknande utsträckning som i angränsande länder, vilket banar väg för politisk pluralism..

The high level of competition and the rapidly growing technology development has created new challenges for today's businesses where they are forced to deliver more customized products at a lower price and a shorter time period. This places high demands on the companies' ability to design and develop better products in a more efficient way. In addition to developing products, the design process focuses on securing long-term success for the company by developing nourishing skills. However, to achieve an effective design process the companies must improve their ability to plan as well as use their knowledge base in a more efficient manner. Toyota's product development system is a critical component for companies to address challenges that they?re facing and offers a great potential to create significant competitive advantages.

This report describes a final thesis done during the spring of 2008 as part of the bachelor degree in computer engineering degree at the School of Engineering in Jönköping.The client is working in the consulting business and is involved in, amongst others, work regarding information security. Within this field they perform so called Threat, Risk and Vulnerability assessments. Today these assessments are done by a predefined method, but many details are controlled by the person documenting the project. A wish was made that the implementation was standardized, it should also ease the task of estimating the need for time and money. The solution for this seems to be a software tool.

Kärnkraften ser vi som ett miljövänligt och bra alternativ för framtiden. Därför kändes det intressant att undersöka om vi som blivande sjöingenjörer har en framtid där efter våran karriär till sjöss. Syftet med detta arbete är att få ökad insikt om vilka teoretiska kunskaper, praktiska och personliga egenskaper som gör sjöingenjören attraktiv i ledande befattningar vid kärnkraftsverk. Datainsamlingen skedde med hjälp av en enkätundersökning och en intervju. Undersökningen skickades ut till Sveriges samtliga kärnkraftverk och intervjun gjordes med en anställd på ett utav dem.

Kärnkraften ser vi som ett miljövänligt och bra alternativ för framtiden. Därför kändes det intressant att undersöka om vi som blivande sjöingenjörer har en framtid där efter våran karriär till sjöss. Syftet med detta arbete är att få ökad insikt om vilka teoretiska kunskaper, praktiska och personliga egenskaper som gör sjöingenjören attraktiv i ledande befattningar vid kärnkraftsverk. Datainsamlingen skedde med hjälp av en enkätundersökning och en intervju. Undersökningen skickades ut till Sveriges samtliga kärnkraftverk och intervjun gjordes med en anställd på ett utav dem.

Det här examensarbetet har genomförts i samarbete med Metso Dynapac AB i Karlskrona. På deras asfaltsvältar finns idag olika modeller av körspakar. De har samma grundfunktion och bör kunna samordnas till ett gemensamt reglage. Detta ger möjligheter att använda rationell tillverkningsmetod p.g.a. volymen.

This master thesis deals with reading and library habits among young male students at the vehicle engineering programme in an upper secondary school. Also their overall opinion of libraries has been looked into. For the completion of this study all of the 43 students in question took part in a questionnaire while 5 of them were interviewed. The result of this statistical survey complemented with more focused interviews show that at some time or another all the students read, but their preference lies within the news and engineering pages of daily newspapers and periodicals. Those who read books choose action and fantasy for content.

The initiative for this project was taken by Benteler Engineering Services, as a result of having identified areas of improvement, in designated accessible areas like the wheelchair spot onboard buses. Depending on a wheelchair to be able to move around can understandably be challenging.Public transport is a common good in today`s society, however despite the measures taken towards adjusting to accessible needs, the majority of those being disabled chose different alternatives of transportation. This is due to reasons such as the drivers' poor attitude, furthermore the limitations of the space allocated to accessible needs, as people with strollers also use these spots onboard. Also, some wheelchair users find the rides unsafe, as they could easily fall over during without the appropriate space for them onboard the buses etc. These are only a few reasons why other options are sought out, i.e.

This report examines the industrialization of a newly developed household machine on behalf of Technogarden Engineering Resources in Karlstad, Sweden. The report is a part of the final course in the Bachelor Program in Mechanical Engineering at Karlstad University and takes place in spring 2014.An innovator, an investor and a engineering consultant firm have through collaboration developed a new type of gruel machine. The product is in its final stage of construction and is planned to be manufactured in a production located in Sweden, autumn of 2014.To compete against today?s trend in outsourcing manufacturing to low cost countries for better profitability, the industrialization of the gruel machine must be done with a minimum amount of resources in order to become successful, which also describes the problem of this study. Using pre-study material in form of Lean production literature, visiting a successful production site and gathering data from involved engineers a specification was developed which describes what this industrialization must achieve and which requests can be accomplished.