This report describes a master thesis performed at Saab in Arboga. The main purpose was to build a controller for a system containing a turn table and an antenna beam. The idea is to use this system on a boat where it will be exposed to position disturbances due to waves. The desired behaviour is that antennas placed on the antenna beam should point towards the same target all the time. To solve this problem the system has been modeled and simulated in Matlab and Simulink.

A system for sampling of alcohol and aldehyde from diluted exhaust gases from vehicles powered by ethanol has been developed and tested. The major part of the work has been research of earlier work in the field and the construction of the sampling system.The part of the system constructed for the measurement of alcohol has been shown to work, however, more test should be performed. The part of the system constructed for the measurement of aldehyde was tested parallel to a commercially available system, based on the same principle of measurement, and has been shown to work well.Determination of the concentration of gaseous ethanol using a FID has shown the since earlier known fact that a FID is not able to measure a correct concentration of ethanol. Furthermore it has been shown that high concentrations of gaseous ethanol can not be kept in a bag more than a few minutes without a substantial decrease of the measured concentration..

A cars powertrain consists of everything that is needed for its propulsion. The components in the driveline that transfer the power from the engine to the driven wheels are not absolutely stiff, hence they will wind up due to the torque and act as torsion springs. If you suddenly demand a bigger torque by stepping on the accelerator pedal, a so called tip in manoeuvre, and that torque is acquired from the engine as quickly as possible, the driveline will not be able to transfer that fast torque change due to its weakness and as a result it will start to oscillate. These oscillations will be transferred to the driven wheels and make the car to accelerate jerkily which will be experienced as uncomfortable by the passengers. Furthermore, there is a backlash in the driveline that will make the weakness in the driveline even more excited than it should have been if the backlash did not existed.To avoid too big problems with these oscillations there is a control system that controls the demanded torque.

When developing software that is meant to be distributed over several different computers and several different networks while still working together against a common goal there is a challenge in testing how updates within a single component will affect the system as a whole. Even if the performance of that specific component increases that is no guarantee for the increased performance of the entire system. Traditional methods of testing software becomes both hard and tedious when several different machines has to be involved for a single test and all of those machines has to be synchronized as well.This thesis has resulted in an exemplary application suite for testing distributed software. The thesis describes the method used for implementation as well as a description of the actual application suite that was developed. During the development several important factors and improvements for such a system was identified, which are described at the end of the thesis even though some of them never made it into the actual implementation.

As companies grow, their need for computing power will increase, which traditionally resulted in companies having to invest in more IT resources. Now, with cloud computing, companies can easily hire computer power over the Internet, on-demand. Cloud computing offers a highly scalable environment where companies can store data and host their services. This paper employs a qualitative study with interviews and literature studies to explore opportunities and challenges associated with cloud computing from a system developer perspective. The aim of the paper is to find out how cloud computing changes the conditions for system development. The paper contributes with four different opportunities and challenges that the system developer must handle to succeed in the world of cloud computing.

A large amount of our time is spent indoors in an artificial climate. To make the experience pleasant there are requirements on the ventilation and the heating system. At the present time the most common form of heating is a radiator system complemented with a ventilation system. A ceiling heating system with combined heating and ventilation can replace the two separated systems. The benefit with a ceiling heating solution is that it saves space since the radiator system is no longer needed.

The thesis describes a completely new biofuel system to generate particle-free heat from combustion of ash-containing biofuel particles at high temperatures.The suggested system gives opportunities to introduce biofuels in new areas.Main components in the suggested system is a heat radiating combustion chamber intended for pulverized wood, combined with regenerators to extract heat from flue gases and simultaneously preheating the combustion air.The thesis contains a description of the suggested system, theoretical considerations, calculations regarding the combustion, and includes results from tests performed.The results from calculations and tests performed concludes that the system is workable and possible to apply..

Syftet med undersökningen Àr att ta reda pÄ om begreppet ?Tekniska system? tas upp i förskolan. Dessutom undersöks hur förskolorna arbetar med teknik enligt den reviderade lÀroplanen, Lpfö 98.Som metod anvÀndes enkÀter dÀr pedagoger satt i arbetslagsgrupper och besvarade frÄgor. EnkÀten anvÀnds för att fÄ en bÀttre bild av hur Älder, kön, tidigare utbildningar och yrkeserfarenhet förhÄller sig till kunskapen av teknikÀmnet.Undersökningen visar att alla förskolor anvÀnde sig av begreppet tekniska system pÄ ett eller annat sÀtt i samtal med barnen, till exempel vid toalettbesök, samt frÄgor ?vart tar rören vÀgen vidare till reningsverket??Vidare framkommer det att fler fortbildningsdagar och studiebesök Àr önskvÀrt för att pedagogerna ska fÄ en större vetskap om begreppet tekniska system.

NÀr en hund diagnosticerats med hypoadrenocorticism bör bakomliggande orsak utredas. I detta ingÄr en analys av plasmakoncentrationen av adrenokortikotropt hormon (ACTH). ACTH anses dock brytas ner snabbt och riktlinjerna för hur provtagning och provhantering Àr dÀrför omfattande. Syftet med denna studie Àr att undersöka stabiliteten hos hundens ACTH för att utvÀrdera möjligheterna till förenklad provhantering. Detta görs genom att studera hur mycket ACTH-koncentrationen i plasma minskar vid olika förvaringstemperaturer och förvaringstider. Vid förvaring i frys under en veckas tid var minskningen av ACTHkoncentration liten.

The purpose of this Master thesis is to examine how college library managers perceive shelves of book reservation system in an integrity perspective. Privacy is an important part of everyday life in the society of today and according to some people, for example a former library lawyer in the Swedish Royal Library, these shelves conflicts with the Swedish law of Secrecy (Sekretesslagen 9 kap. 22 §). I am therefore interested in how they perceive this system: what weaknesses and strengths it has, why they implemented it, how they have interpreted this law. To answer this I have used a qualitative method called phenomenography and done interviews with five college library managers.

The study's aim is to create an understanding for the question why Sweden in 1921chose to create its own classification system for public libraries instead of adapting e.g.the Dewey-system which - at this time - was internationally we11 spread. It examines thesocial changes which proceeded the creation of the Swedish Library Association (SLA)in 1915 and discusses in depth the work of the committee appointed by SLA to createthe classification system. Special interest is also given to the relation between SLACSand the Dewey-system.The study shows that the main influence on the codttee's work was the formerSwedish tradition of classification practice. The Dewey-system was seen as inappropriateto adapt in the Swedish libraries because of the vast changes that wouldhave to be done, and the fact that the decimal notation was practically unused in anylibraries in Sweden.From a methodological point of view, the study tries to apply a critical hermeneuticalapproach as developed by Paul Ricoeur.The study contains an extended English summary..

This thesis considers the development of the software for an, newly developed, embedded real-time control system, based on a Periferal Interface Controller (PIC). The control system is developed to be used for several different applications. In this thesis work, software for two different applications are developed. The first task is a time controlled system, while the other task is implementation of aPI-/PID-controller. A user interface is also developed and implemented.The time controlled system is an automatic horse feeder, which is used for feeding horses at certain predefined points in time.

NĂ€r ett system införs, spelar det ingen roll hur god funktionalitet det har, om anvĂ€ndarna av nĂ„gon anledning inte kan eller vill anvĂ€nda det pĂ„ ett effektivt sĂ€tt. I första hand bestĂ€ms anvĂ€ndbarheten hos ett program av egenskaper hos detta och hos de aktuella anvĂ€ndarna. God anvĂ€ndbarhet beror av acceptans frĂ„n anvĂ€ndarna, kompetens hos anvĂ€ndarna och anvĂ€ndarvĂ€nlighet hos systemet.För att undersöka hur man kan uppnĂ„ hög anvĂ€ndbarhet och dĂ€rmed en hög grad av anvĂ€ndande vid införande av ett nytt system, har vi gjort en undersökning av anvĂ€ndbarheten och anvĂ€ndandet av ett system vid Landstinget i Östergötland.VĂ„ra slutsatser visar pĂ„ att utbildning och information Ă€r mycket viktiga faktorer för att uppnĂ„ hög anvĂ€ndbarhet för ett system. MĂ„nga har en motvilja mot att anvĂ€nda datorer och problem med att se vilka fördelar ett införande av ett nytt system kan medföra, nĂ„got vi anser kan lösas med bĂ€ttre utbildning och information. Trots att teorier om anvĂ€ndbarhet funnits i över tio Ă„r, har vi funnit att det forfarande inte tas tillrĂ€cklig hĂ€nsyn till de grundlĂ€ggande faktorer som pĂ„verkar anvĂ€ndbarheten vid införande av ett system..

Abstract: After their introduction, technical systems designed for Situational Awareness have changed the possibilities on the battlefield. Today, Swedish tanks use a system known as the TCCS. This system offers many advantages to a tank platoon, but does it also bring disadvantages? This essay examines pros and cons with the TCCS. To find these the author uses a Swedish Armed Forces analyze model in a comparative study.

Protected Designation of Origin (PDO) is a quality control system created by the European Union (EU) to protect integrity of certain food and drinks that are produced in a specific area in a unique way. By protecting these products, the EU can certify that the traditional region-specific methods of food and drink production are preserved. The EU countries that follow such a system are mostly from Southern Europe. For instance in France, the PDO system has helped improve the income for farmers, boosted the rural development and assured protection for farmers against the abuse of their brand and the selling of their products by outsiders. In Sweden, there are no PDO products yet, instead there is Protected Geographical Indication (PGI) and Traditional Speciality Guarantee (TSG) that are not as protective as PDO.