When a helicopter is flying, the dynamics vary depending on, for example, speed and position. Hence, a time-invariant linear model cannot describe its properties under all flight conditions. It is therefore desirable to update the linear helicopter model continuously during the flight. In this thesis, two different recursive estimation methods are presented, LMS (Least Mean Square) and adaptation with a Kalman filter. The main purpose of the system estimation is to get a model which can be used for feedback control.

The web is getting more and more characterized by personalization. Big socialnetworks like Facebook as well as the leading search engine Google increasingly usepersonalization algorithms to tailor the information that they present to users. All inorder to make the information more relevant and engaging for the end consumer. Howdoes this personalization affect journalists who increasingly search the web as a partof their journalistic research? In this essay we have looked at the effects thatpersonalization has on the journalists of tomorrow by conducting a survey amongstudents of journalism.

Highly polluted urban storm water from e.g. highways can contain large amounts of heavy metals that may cause harm if they are discharged into recipients. To remove the heavy metals a possible low-cost method that does not require much maintenance, could be the use of reactive filters with filter materials consisting of industrial residues or other cheap mineral based materials. Dissolved metal ions are removed by reactive filters through the processes of ions binding to active sites on the surface of the filter materials, or by formation of insoluble precipitates.The ability of CaO-treated granulated blast-furnace slag, iron oxide coated sand, olivine and nepheline to remove seven heavy metals (Cr, Cd, Cu, Ni, Zn, Pb and Hg) from urban storm water was studied. Initially batch experiments were performed where the effect of pH, dissolved organic carbon (DOC) and dissolved ions on the adsorption efficiency was studied.

This report present a working model for simulation of what happens to colors displayed on screens when they are observed through optical filters. The results of the model can be used to visually, on one screen, simulate another screen with an applied optical filter. The model can also produce CIE color difference values for the simulated screen colors. The model is data driven and requires spectral measurements for at least the screen to be simulated and the physical filters that will be used. The model is divided into three separate modules or steps where each of the modules can be easily replaced by alternative implementations or solutions.

Filtermaterial av 75 % torv och 25 % kolaska har använts under 2 respektive 4 år för rening av avloppsvatten från två biltvättar. Jämförelse med Kristianstads kommuns riktvärden för avloppsvatten från fordonstvättar visar att filtren fungerat. För avfallsklassning krävs kunskap om innehåll av miljöfarliga ämnen i produkter som använts i tvätthallarna. I brist på kunskap om innehåll av ej analyserade miljöfarliga ämnen i filtren anses förbränning vara ett bra omhändertagande ur miljösynpunkt, då energi och aska återvinns..

Due to increasing regulations regarding new diesel vehicles particulate matteremissions the new Scania truck, Scania Euro 6, has been equipped with a particulatefilter. This component effectively stores the particles in the exhaust gas but must becleaned in order to prevent itself from clogging. The filter is cleaned through aprocess named regeneration which is a thermodynamic process in which thetemperature of the filter is raised through fuel supplied to the exhaust gas.The purpose of this thesis is to contribute to the development of improved controlstrategies of the temperature during the regeneration process through thedevelopment of model-based controllers. These controllers are designed in order tohave good performance in stationary as well as automatic regeneration.In order to develop these model-based controllers a model of the system isconstructed. The model is described as a linear thermodynamic grey-box model withflow varying parameters, showing good results in validation.The model provides a simulation environment during the controller design, which isfocused around the development of linear regulators with the exhaust gas mass flowas a scheduling variable whose size determines controllers? mode of operation.

AbstractAuthors: Mikaela Magnusson & Malin StenströmTitle: Jolly women and ugly men - a study of the way men and women are portrayed in the magazines Filter and FokusLevel: BA Thesis in JournalismLocation: Linnaeus UniversityLanguage: SwedishNumber of pages: 78 Everyday we're exposed to gender roles. It can take the form of our immediate family, our classmates, the books we read, the teve series we watch or the magazines we read. Everyday the world around us shape the way we think of men and women and how they're supposed to be. As a part of either (or neither) of those genders we are all shaped into the mold that society has set for us. The media is one of the largest contributors to this socialization and therefore we felt it necessary to study two, critically acclaimed, media outlets and shed some light on their portrayals of gender. We chose to study Filter and Fokus, two social magazines with close to a corresponding amount male as female readers and a reputation of being modern and free of prejudice.

Östby waterworks in the community of Kramfors has since 2003 had problems of fast clogging of the slow sand filters. As the clogging appears more often, they must be cleaned more frequently which has made the drinking water preparation difficult. Wintertime it has sometimes been impossible to clean the filters which has led to their closing and this has influenced the water quality negatively.The waterworks is a surface waterworks which takes its raw water from the lake Sjöbysjön. The water is flocculated and filtered in a contact filter with the flocculent EKOFLOCK 91. Thereafter it is alkalinized before it reaches the outdoors placed slow sand filters.

Den obemannade  helikoptern Skeldar utvecklas av Saab Aeronautics. Saab är intresserade av hur väl sensorfusion kan användas för navigering av en obemannad helikopter. Med sensorfusion kan tillgängliga sensordata fusioneras. Det är mätningar från accelerometer, gyro, GPS och magnetometer som används av olika Kalmanfilter. Olika sensorfusionsmetoder föreslås, däribland Extended Kalman Filter (EKF) och ett heuristiskt filter för att visa på hur man intuitivt kan göra för att fusionera mätningar jämfört med det modellbaserade sättet som Kalmanfiltret erbjuder.

Texture is an important soil property and accurate particle size analysis of soil texture is therefore crucial. There are a number of well-established and newly developed methods available for determining soil texture. In order to compare the results of these methods, the differences between them must be determined. The difficulties, problems and differences regarding texture class determination were examined through a study performed on forest soil samples. The study compared different methods (pipette, hydrometer and field methods) and two types of dispersing agents (sodium pyrophosphate and sodium hexametaphosphate (calgon)) commonly used for particle size analysis.

Syftet med min undersökning är att ta reda på hur elever med spanska som främmande språk upplever kommunikativa aktiviteter i en samtalsmodul. Frågorna är: hur viktig är elevernas exponering för de kommunikativa aktiviteterna (input) i en samtalsmodul med avseende på språkinlärning och hur viktiga är dessa aktiviteter för deras affektiva filter? Jag har använt mig av en enkät för att få svar på mina frågeställningar.                      Undersökningen har varit kvalitativ och den visar att majoriteten av informanterna anser att exponeringen för kommunikativa aktiviteter (input) i samtalsmodulen spelar en viktig roll för deras språkinlärning och de flesta upplever detta som positivt för deras kommunikativa förmåga. Informanterna upplever också att de är motiverade att delta i modulens aktiviteter eftersom modulen skapar en positiv miljö som främjar en känsla av förtroende och språklig säkerhet.  Jag drar därför slutsatsen att aktiviteter i samtalsmodulen främjar deras affektiva filter..

Syftet med min undersökning är att ta reda på hur elever med spanska som främmande språk upplever kommunikativa aktiviteter i en samtalsmodul. Frågorna är: hur viktig är elevernas exponering för de kommunikativa aktiviteterna (input) i en samtalsmodul med avseende på språkinlärning och hur viktiga är dessa aktiviteter för deras affektiva filter? Jag har använt mig av en enkät för att få svar på mina frågeställningar.                      Undersökningen har varit kvalitativ och den visar att majoriteten av informanterna anser att exponeringen för kommunikativa aktiviteter (input) i samtalsmodulen spelar en viktig roll för deras språkinlärning och de flesta upplever detta som positivt för deras kommunikativa förmåga. Informanterna upplever också att de är motiverade att delta i modulens aktiviteter eftersom modulen skapar en positiv miljö som främjar en känsla av förtroende och språklig säkerhet.  Jag drar därför slutsatsen att aktiviteter i samtalsmodulen främjar deras affektiva filter..

This master thesis was a continuation of a previous study in the diesel exhaust characterization, which is part of the academical work embedded in the EMIR-1 project. The main objective of this thesis work was to finish the installation and make the proper modifications of the particulate mass measuring system located in one of the engine test cells at KTH, in order to be able to measure the mass of the particles from the exhaust of diesel engines.This experiment requires a diluted flow sample from the exhaust that should be sent to the device that makes possible the measurement of particle mass, called TEOM. In the first stage of this project, the objective was to study and make the proper modifications in the existing KTH diluter because there were several problems to obtain a constant dilution ratio from it during tests.This modifications were made and it resulted in a great improvement in the maximum inlet and outlet flow that this diluter can handle. Therefore another modification is proposed for controlling the inlet exhaust flow so it will be possible to regulate the dilution ratio and make it constant along a wide range of engine loads and speeds.The second and most important stage was to make particulate mass measurements possible by analyzing the frequency signal from the TEOM device. The idea was to obtain the frequency of oscillation from the tapered element in the TEOM, and therefore with the proper correlations, be able to predict the particulate mass concentration in the exhaust flow from the engine.An electrical problem in the TEOM circuit was detected and corrected, so the signal that carries the frequency from the TEOM can be analyzed properly.

At Flight and Systems test Saab AB, a post-processing software is used to process GPS data. A new software by the name GrafNav has been purchased and the purpose of this master thesis therefore became, partly to make a judgment regarding GrafNav?s ability to estimate position, velocity and accuracy, partly to if needed improve the estimate and finally find one or several methods to estimate the position and velocity accuracy. The judgment of GrafNav was performed partly by a comparison to the former post-processing software (PNAV) and partly by a comparison to the airplane?s inertial navigation system (INS).

During Spring semester 2011, Linda Engstrom and Malin Heder performed ?Golden Ratio?, a thesis which included 22.5 hp. The thesis followed the syllabus for the Degree Project for degree of Bachelor of Science in Innovation and Design Engineering (MSGC12) which was a unit in the Innovation and Design Engineering program within the Faculty of Technology and Science at Karlstad University.The client was Crem International AB, a company located in Åmotfors that develops the design, manufactures and markets coffee machines. The supervisor at the company has been Peter Larsson and supervisor at Karlstad University has been Monica Jakobsson. Examiner for the thesis has been Professor Fredrik Thuvander at the Faculty of Technology and Science at Karlstad University.Crem International AB controls a patent, representing a new technology to streamline and minimize use of energy during the coffee preparation and results in a good coffee quality.