Under fem veckors tid har jag utfört mitt examensarbete på Facebook Data Center i Luleå. Målet med arbetet var att installera ett internt nätverk som skulle ersätta ett annat internt nätverk. Bakgrunden till arbetet är att nätverket som redan existerade i datacentret (innan bygget överlämnades till Facebook i Luleå) hade en omodern nätverksstruktur. I arbetet avsattes tid till inläsning av plattformarna för routrar och switchar. Dessa enheter monterades senare upp i respektive rack.

The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.

The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.

The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.

The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.

The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.

För att företag ska nå framgång gäller i de flesta fallen att verksamhetsstyrningen är tydlig och väl utarbetad. Strategin bör vara kopplad till mål och indikatorer som talar om huruvida företaget är på rätt väg eller ej. Inom den konservativa installationsbranschen relateras detta arbete ofta till den traditionella ekonomistyrningen. Det balanserade styrkortet är en teoretisk modell utarbetad för att balansera upp styrningen och inte bara se till det finansiella.Syftet med studien är att genom det balanserade styrkortet visa på ett konkret förslag hur arbetet med en mer balanserad styrning kan tillämpas. Arbetet har baserats på den undersökning i form av intervjuer samt enkäter som gjorts på fallföretagets östra region.Studien har visat på flera olika framgångsfaktorer över styrkortets perspektiv där respondenterna ofta varit eniga om vad NVS bör utveckla.

One important issue faced by companies is to secure their information and resources from intrusions. For accessing a resource almost every system uses the approach of assigning a unique username and a password to all legitimate users. This approach has a major drawback. If an intruder gets the above information then he can become a big threat for the company and its resources. To strengthen the computer security there are several biometric methods for identity verification which are based on the human body?s unique characteristics and behavior including fingerprints, face recognition, retina scan and signatures.

The aim of this study is to find a method to incorporate the energydemand of a building in the investment cost estimate.The study is based on an actual apartment block. The significant energyaspects are identified, and changed to more energy efficient options.These are then simulated using the energy calculation program VIP+.The calculated energy need is used in the investment cost estimate, andthe simulated alternatives are compared in regards to their economicalprofitability.Depending on the focus, different alternatives are the most advantageous.Since this study aims to show which alternative is the mosteconomically profitable, the annual profit is the parameter of mostimportance. This means that individual measuring of heating and hotwater use is the recommended change of the original house. A changeof the windows to new ones with a U-value of 1,0 as well as 0,8W/m2K also results in a positive change of the annual profit comparedto the original house..

Rapporten presenterar skapandet av en produktkonfigurator och flera förslag på hur den kan förbättras. Uppdraget gavs av System Andersson till två studenter på Jönköpings Tekniska Högskola som genomförde detta som sitt examensarbete.Rapporten diskuterar möjliga lösningar på en produktkonfigurator och visar ett resultat som utgår från dessa lösningar. Produktkonfiguratorn i rapporten består av två delar.Dels konfigurationsdelen som hjälper användaren att skapa nya produkter utifrån valda artiklar. Artiklarna sorteras automatiskt av produktkonfiguratorn så att endast kompatibla artiklar kan sättas ihop. Detta sker med ett ?drag and drop? gränssnitt.Dessutom innehåller produktkonfiguratorn en kompatibilitetsdel, vars uppgift är att underlätta vid definierandet av kompatibilitet mellan artiklar.

Bergvärme har länge varit populärt i Sveriges kalla klimat som ett hållbart energiutvinningsalternativ. Individer som var tidiga med att installera bergvärme börjar idag behöva byta ut sina värmepumpar. En förnyad standard med värmepumpar dimensionerade för att klara en större andel av hushållets maximala effektbehov kan dock medföra problem vid ett nyinköp. En för hög effekt i värmepumpen i ett för kort borrhål kan sänka borrhålstemperaturen och försämra värmefaktorn för systemet. Detta projekt undersöker temperatursänkningen i borrhålet vid installation av en ny värmepump i ett gammalt system.

There is a constant change in the world of school, new curricula and syllabi are made and the view of teaching and learning is changing. The desire to improve maths teaching in Swedish schools is strong, especially by laboratory work. How is it then that several teachers in our schools are still using the traditional way of teaching mathematics, which I consider to be relying a lot on the textbook and work for an automated approach?The purpose of my study is to investigate how three different math teachers on an F-5 school in the southern Stockholm area, choose to work with mathematics and why they choose to work according to a special approach. In order to obtain the information I seek, I have chosen to use the qualitative method to get a better understanding of my results.

Within all industries, there is a change in working time required; this also includes the construction sector. However, the way construction sectors are differentiated is by not having been given the opportunity to be practiced or tested.  The aim of this thesis that we have done in collaboration with the Concrete Industry was to investigate the possibility of developing an automated method for quality assurance of SKB at the site. The idea is to make the O-funnel to be more utilized and therefore ensuring that the appropriate concrete quality is provided which eventually would lead to a better development in the production process.The project has involved theoretical work and laboratory experiments. The theoretical work gave us a good foundation at the beginning of the project. After gathering the information and material, the laboratory experiments began by SCC in their laboratory in Hammarby. The collected data from the various laboratory tests formed the foundation for trying to relate measurements for consistency of SCC with each other and therefore find out how measurements from O-funnel varies with different concrete mixtures.

The main purpose in this degree thesis is to investigate changes in performance when introducing a newly produced Real-Time database in one of CC Systems products, the Diagnostic Runtime Engine, DRE. The thesis is a collaboration between CC Systems, creator of DRE, and Mimer AB, developer of the Real-Time database.The result reveals that the time spent on database access is considerably lesscompared to the originally used database. The research has lead to several additional requirements on the real-time database and these are presented as part of the result in this thesis. The additional features will help making the product more suitable for DRE and similar applications.Additional research is required to be able to recommend the use of this product or not. Primarily the performance in another operating system, Windows CE, but also the introduction of additional features should be investigated.

Arbetet behandlade vilka konsekvenser inom driften (ekonomiska kostnader och teknologi) som rederier kommer att drabbas av när IMO:s barlastkonvention träder i kraft då barlastvattnet måste renas innan inträde i Östersjön. Arbetets syfte var att få fram vilka konsekvenser det blir för rederier när IMO:s barlastkonvention träder i kraft. Resultatet skulle jämföra skillnaden mellan lag och rekommendation då Helsingforskonventionens rekommendationer baseras på IMO:s barlastkonventions krav. En kvalitativ metod valdes för att komma fram till resultatet, i form av en öppen intervjustudie, där fyra olika företag har intervjuats. Syftet med intervjuerna var att se ifall de följde Helsingforskonventionens rekommendationer och vilka konsekvenser det skulle innebära och skulle komma att krävas då Barlastkonventionen träder i kraft.