This masters thesis deals with smoke spread via ventilation systems. One aim of the thesis is to investigate and explain the differences in efforts to prevent smoke spread via ventilation systems in different countries. A second aim of this thesis is to investigate how frequently occurring smoke spread via ventilation systems in Swedish buildings are. A third aim is to investigate how uncertainties in input variables to smoke spread calculations will affect the result of calculation. To be able to do this the most important input variables are identified and analysed.

Requirements Engineering processen, RE-processen, är den tidiga fasen i ett systemutvecklingsprojekt, där RE-processens syfte är att identifiera, verifiera, validera samt dokumentera en mängd krav som ett nytt eller utvidgat system skall konstrueras efter. RE-processen skall mynna ut i en kravspecifikation där de dokumenterade kraven finns samlade.Detta examensarbete behandlar ämnet systemutveckling och fokuserar på konsultföretags metodanvändande under RE-processen. Att fokus ligger på RE-processen beror på att denna fas är den mest kritiska delen i ett systemutvecklingsprojekt.För att få svar på vilka metoder som konsultföretag använder under RE-processen har en intervjundersökning gjorts.Resultatet av undersökningen visar att konsultföretag använder olika metoder under RE-processen. Sättet att använda dem fungerar på ungefär samma sätt med ett aktivt deltagande från kundernas sida. Systemutvecklingsmetoderna är också uppbyggda på liknande sätt med samma synsätt att arbeta efter..

This thesis primarily includes a study on whether companies can develop a mathematical activity that supports students' motivation in mathematics. The work was done together with Midroc Electro, a company that pays attention to the difficulty of recruiting and therefore was interested in investigating how the business world would be able to contribute.The thesis can be divided into three stages. The first part comprised by a exploration into research on student motivation regarding mathematics as well as numerous interviews with engineers to see how the research findings did fit with Midroc Electros reality. In these studies it became clear that the student who aims for a profession whose education or work requires math belongs to the group of students who primarily manage their studies in mathematics, that is, those that have the greatest motivation to work hard and complete their studies.Research information and interviews were compared and resulted in the thesis second part, Midroc Challenge. An activity where students primarily came to learn about the engineering profession and secondly how mathematics can be used in the engineering profession.

Vid produktutveckling inom industriföretag finns idag luckor vad gäller IT-stöd i arbetets olika faser. Införandet av s.k. RBE-system (Rule Based Engineering) är ett steg på vägen mot att försöka fylla dessa luckor. Meningen med ett RBE-system kan sägas vara att ersätta traditionella konstruktionshandböcker med motsvarande konstruktionsanvisningar i digital form. Detta ger möjligheter till automatisering av processer som är tidskrävande, monotona och ofta förekommande, t.ex.

The number of data centers and their capacity is increasing throughout the world. Theenergy used in these data centers and the emissions from the use are increasing at thesame rate. The total use of energy will double from 2008 to 2011 based on the trends indata centers use. Research in this area says that the emissions from data centers willhave surpassed the level of airline traffic in 2020. The index used today to compare howefficient a data center is, called PUE, is lacking some information.

Fokus på basens roll i musik. Hur används instrumentet i ensemblen? Vad händer om basens roll utvecklas och hittar nya ytor i gruppen? Ett arbete om skapa musik med influenser från jazz och fusion som sätter basen i nytt ljus..

This report is a degree paper made for the Engineering program in Technical Chemistry at the School of Engineering, Jönköping University.The intention of the project which is described, is to answer whether HV71 might become environmentally certified according to the criteria of "miljödiplomering". The project also included an investigation of which further steps and measures must be undertaken by the enterprise in order to achieve the certificate. The final part was to implement the necessary requirements for the certification.The report starts with a short background where the origin and function of environmental management is briefly explained.The report continues with how the practical work with the environmental certification was done according to requirements of Jönköping municipality. Motivations behind each part of the process are given as well as explanations of how each part of the process was carried out.The final result of the project was that HV71 took the measures needed to live up to the required demands. After a revision made by Miljöstrategen i Jönköping AB, HV71 passed the demands and became thereby an environmentally certified business..

Detta arbete är sekretess belagt under de närmaste två åren och därför kommer bara sammanfattningen att publiceras för tillfället..

I samband med att mellanspänningsnätet kablifieras ökar också kraven vad gäller fellokalisering. För att hålla avbrottstiderna i nätet korta är effektiv felsökning erforderlig. Detta arbete syftar till att kartlägga och redogöra för begränsande faktorer som finns vid fellokalisering med fokus på pulsekometoden. Uppdraget utförs tillsammans med Vattenfall Eldistribution AB.Det har uppdagats problem gällande fellokalisering på mellanspänningskablar med pulsekometoden. Ett flertal faktorer bidrar till denna problematik.

Företaget Radius Control Systems AB sysslar huvudsakligen med utveckling och underhåll av SCADA applikationer. Radius hade önskemål om att kunna visa väderinformation från en väderstation i Radius egna övervakningssystem Uni-View. Detta skulle ske via ABB: s styrsystem AC 800M/ 800xA, med en PM856 processor. Arbetet handlar om att upprätta kommunikation mellan en PLC och väderstation, och från PLC vidare upp till Uni-View. Rapporten behandlar hela arbetsprocessen med början från en prototyp till ett fungerande system.

The Master of Science in Energy Systems Engineering program at Uppsala University started in 2000 and 221 students has graduated since. This master thesis aims to answer what competencies alumni considers most important for successful professional practice. It also seeks to find out how these competencies are reflected in the program to identify potential gaps between importance and how the competencies are being prepared. With inspiration from similar research a method has been developed consisting of two steps: (1) A survey and (2) interviews with alumni. The alumni survey rates the professional importance of 13 competencies and how well the corresponding competency is prepared in the program.

The Island of Öland has one of the best wind climates for land based wind power in Sweden. An objective for the Island is to become self sufficient using electricity from renewable source of energy such as wind. There is currently 55 MW capacity installed on the Island and it is estimated that grid congestion will occasionally occur if more than 135 MW was installed.The aim of this thesis is to investigate he possibilities for load management by smart charging of electric vehicles, EV. The definition of smart charging is that the charging is done to some extent with an ICT-system, (information and communication technology) that correlates wind electricity generation to the charging of electric vehicles. The purpose is to avoid grid congestions on the sub-sea cable that connects Öland to the mainland because that in turn would curtail wind energy production.

Detta arbete är en magisteruppsats i Systemvetenskap med inriktning data och systemvetenskap, 10 poäng, vid Luleå Tekniska Universitet. Uppsatsen klargör vilka faktorer som avgör en användning eller icke-användning av Case-teknologin. Case-teknologin möjliggör ett ingenjörsmässigt närmande till mjukvaruproduktion och systemutveckling genom att tillföra nödvändig systematik, standardisering, automation och kvalitetssäkring. Ett stort antal undersökningar är gjorda genom årens lopp med syfte att förstå och förklara varför det som teoretiskt borde vara lösningen på problemet med undermåliga system inte tycks ha blivit detta. Resultatet av undersökningen tyder på att de variabler som Prekumar och Potter kom fram till i sin forskningsmodell ? relativa fördelar, kostnad, komplexitet, kompabilitet, produkt förespråkare, stöd från ledningen och operativ expertkunskap har störst påverkan på användningsbenägenheten av Case-teknologi..

The purpose with this report is to illuminate the construction solutions and the deformations that could exist in medieval parish stone churches. But also to increase the writers understanding how activity forces effect the construction of the churches. With help from literature and a practical study, containing three churches the writers have collected the material that the conclusions and discussions are built upon in this report. The construction of the churches consists of three parts, the wall, the roof and the vault. The construction solutions are similar in the churches disregard of the roof, where the roof trusses are different.

In this report a systematic working procedure for risk classification of processing equipment from a maintenance point of view is described. How this system has been worked out is also an important part of the report. The classification system is adapted for use in complex processing plants. Preemraff Göteborg has been subject for the underlying study and application of the system.The system aims to give a good overview of the maintenance related risks at the plant. Furthermore, the analysis result is a good motivation for the suggested maintenance activities and as motivation for extended or decreased maintenance resources in total.