SAAB Aerotech division FGR in Arboga builds and develops equipment and components used in both military and civilian applications. To build a test system for a specific project that SAAB is responsible for requires a simple signal generator that can provide a pulse modulated signal. The need to buy a new advanced signal generator for example from Agilent is not as profitable as the instrument is expensive and contains features that SAAB does not require in their applications and test systems. That was the reason why SAAB offers two students a thesis where the goal is to construct a signal generator in accordance with what SAAB requests.This thesis contains several different phases. The first step was a meeting with our supervisor Mats Bergman and by reading the data sheets for components to be used in the project, with these information and specifications that we have received from SAAB we started to construct the signal generator.What we did during the construction work was to simulate and draw a schematic to be able to design the circuit board.

The idea to develop  a platform for a PID-controller came from the need to control the temperature in  an espresso machine in a more exact way than a thermostat could perform. In discussions with Syntronic AB the idea developed into PID-control for industrial use. Syntronic AB suggested that the platform should be based on a commercially available processor module to shorten the development time. The suggestion included the use of the microcomputer Raspberry Pi, which supports USB, HDMI, memory card and Ethernet.The work began with establishing a schedule for the 10 weeks of the projects duration, and after that a system specification listing all functions, implementation and limitations was made. When the foundation of the system specification was done, a preliminary system design took shape.Because of the Raspberry Pi´s lack of Analog-to-Digital converter, a circuit board containing Wheatstone bridges, differential amplifiers and a two channel Analog-to-Digital converter was fabricated.

The purpose of this master thesis is to construct a steering transmission, for a trackedvehicle, containing two hydraulic circuits which are connected. The steeringtransmission should be mechanical to avoid steer-by-wire.BAE Systems Hägglunds has in an earlier study examined a system with two hydraulicpumps and one hydraulic motor, but the safety of the system wasn?t sufficient.To achieve sufficient redundancy there must be two hydraulic motors, which arecontrolled separately. When the two systems are connected in one point, this point is acritical part of the system because it directly affects both circuits. If one of the hydrauliccircuits fails the other should be able to operate independently as a steeringtransmission.

Since their invention in 1999, CubeSats have become a widespread standard for small picosatellite missions. CubeSats allow for quick development of satellite payloads and launch in space without the high costs of a normal satellite. Emphasis during the CubeSat design process is placed on use of commercialoff- the-shelf (COTS) components and reuse of previously-designed units.This report describes the interfacing of a scientific magnetometer, the Small Magnetometer in Low-Mass Experiment (SMILE) to such a CubeSat mission, the Space Weather using Ion spectrometers and Magnetometers (SWIM). Design of a complete platform for use in multiple such missions is presented here.Modularity is one of the key aspects followed in the course of the work. A new board containing the analog pick-up and compensation circuitry for SMILE has been designed to fit inside a CubeSat frame.

AbstractPurpose/Aim: The aim of this essay is to paint a picture of science news reporting in the Swedish Public Service science programme, vetenskaps-radion. Key issues to be adressed are: What areas in science are prioritised? How much of the total broadcast time are devoted to each area? Are there any differences in reporting between weeks? How well does the swedish science radio match common interets? Are the news in the form of short ?soundbites? or are they more lengthy in-depth?Material/Method: Quantitative analysis of radio programmes. The variables used are based on the different major areas in natural sciences.Main results: This study shows that most broadcast time is devoted to news regarding biology and medicine and that the news rather are in the form of short snippets of news than more lengty in-depth stories. This is put in light of how journalistes tend to present news and that the subjects involved has to relate to peoples everyday lives.

Syftet med detta arbete var att genom prestandatester undersöka den förbättring i läs- och skrivhastighet samt medelaccesstid som kan uppnås då data placeras på de yttre sektionerna av hårddiskens skivor, jämfört med om data placeras över hela hårddiskskivornas yta. En hårddisk har högre överföringshastighet i den yttersta sektionen av hårddisken och lägre överföringshastighet i den innersta sektionen. Arbetet analyserade den påverkan på prestanda som ovan nämnda dataplacering har på en enskild hårddisk och olika RAID-konfigurationer. Rapporten är intressant då det är lättare att med informationen som presenteras i rapporten, planera hårddiskkonfigurationer som leder till optimerad prestanda. En experimentell metod användes för att utreda prestandaskillnaderna.

Storage of biomass is associated with problems like heat development, biomasslosses, and reduction of the fuel quality. Certain processes such as biological- andchemical degradation are responsible for these storage problems. This master?sthesis was carried out at Vattenfall Research and Development AB and is alignedtowards quantifying the biomass losses from short-term storage (1-2 months) ofbark and recovered wood. The biomass was stored in outdoor piles during differentseasons, campaign 1 (summer) and campaign 2 (autumn).

All my short stories have been written in an intuitive way according to which no outline of characters, intrigue or plot was made in advance. A consequence of this process is that not even myself as the author is aware of the meaning of the texts and therefore I too have to interpret the stories. Because of the character of the text, I use an analysis of archetypes according to C. G. Jung?s analytic psychology.

I följande uppsats jämförs bilden av "Sverige ? det nya matlandet" mellan Jordbruksverket och VisitSweden och hurvida den överensstämmer eller ej. Det empiriska materialet är baserat på rapporter, pressmeddelanden och andra webb publikationer. Materialet analyseras sedan enligt en diskursanalys. Vi fann att bilden skiljer sig mellan de två aktörerna..

This thesis uses ten years of data to examine the underlying drivers behind changes in the taxi price, specifically we look at the relationship between the taxi price and changes in the underlying costs. We use a two-step error correction framework to investigate how changes in costs affect prices in the long run as well as in the short run. We also study if the price adjustment process is asymmetric. Furthermore, we examine if price discrimination exists on the taxi market in Stockholm. We find that in the long run the pass-through effect is almost complete, whereas in the short run prices are considerably less sensitive to cost changes.

It is in society's interest that news is conveyed in a correct and memorable manner. News contributes to general knowledge and increases awareness of other people's life situations. Because of news the population is able to follow and be a part of the political debate. Therefore, it is important that one remembers what one has seen, both in long and in short term, i.e. memorability is a critical aspect when it comes to news.The aim of this work was to study the news form a memorability perspective, that is, how long one remembers the news after watching them.

The purpose of this text is to show how the mother motif is portrayed in four selected novels by Alfred Kämpe, but the thesis also serves the purpose of emphasizing the fact that the mother motif can be seen interacting with the class motif.This text will account for a new insight into the motifs in Alfred Kämpe?s Trälar. Known as one of the first authors to write in the genre of working-class literature in Sweden Kämpe?s texts provide motifs common for this genre such as class, identity and solidarity. As this thesis shows there is yet another motif that should be included among these typical Swedish working class literature motifs: the mother motive.

Ever since ABB has begun diecasting their rotors instead of permanent mold casting it,variation in the quality of the cast has arisen. Diecasting is performed in three differentmachines, M1, M2, M3 with 400, 660 respectively 800 tons of die locking pressures.The aim of this thesis is to answer the following questions:What is the ?right? cast quality? How is the right quality achieved?For sizes 160-180 solutions will be proposed that consider eccentricity between thelaminate and the Short circuit ring as well as elimination of the thin Al film that appearson the outer periphery of the rotors.Through considering the statistic material the most often diverging rotor type has beenidentified and one of the actual rotors has been sent to a laboratory to be analyzed inorder to establish the current defects. The result of the analysis shows that there areplenty of gas- and oxide-porosity.It has been proved that every time the dies temperature decreased below 120°C thecontent of gas porosity increased. It is due to rapid solidification of metal that flowsthrough the ?cold? laminate.It has confirmed that enhanced porosity in squirrel cage causes high impedance in therotors.

As a guitarbuilder it is an advantage if you can control and understand what is creating the character of the tone. To approach this vast jungle of variables that controls the tone in a guitar, I built two guitars and in one, guitar 2, reduced the thickness of soundboard, back and sides.The purpose was to compare the guitars and establish if there was a significant difference and what it was, in the guitars ability to produce sound. The thought was also to try the thesis: loud but short, long but moderate tone. Also if a lighter built guitar has an advantage in producing a loud but short ton and vice versa.The instruments has been examined by five guitarist, one guitarbuilder and a professor in Speech, music and hearing at KTH in Stockholm.The relative obvious conclusion is that guitar 2 is a bit louder and has a clearer base and treble but the more part of the guitarists fancied guitar 1 better. This one has got more mass fore the tone to stay alive with.

This project is part of the course MF10YX, introductory mechatronics. The purpose of theproject is to integrate modules from the group members previous specializations into amechatronic system in the form of a self-balancing robot. The prototype ?Charlie? should be ableto race along a 10 - 30 m line. It should be able to start manually and autonomously detect andstop after the finishing line.