The last few decades the development in the field of electronics has been huge. The components performance gets better at the same time as the manufacturing cost decreases. Many of the design moments that have to be done, are done automatically today, but it can get better. Especially for analog circuit design.At Electronic System in Linköpings universitet, research is in progress to develop a tool that can design analog circuits in reasonable time. It means that it has to size the components (transistors, resistances, capacitances etc), so that the circuit can fulfill the performance requirements.

AbstractResource efficient manufacturing is a term that has been increasingly applied within manufacturing, where one of the key points is to reduce waste of such forms that do not add value for the end customer. By the Lean principles, there are seven plus one types of waste, in which the definition of the eighth point varies among sources. In this study, the eighth type of waste has been interpreted as the untapped creativity and competence among employees that has not been put to use. From this, our question was incubated; How can you make the most of the employees? untapped creativity and potential within manufacturing? The case study will be developed with empirical data obtained from Dometic Group by conducting interviews.From the gathered literature, it was concluded that the communication between employees contributed to an increased understanding of one another as well as it allowed for improvement in work.

Comfort analyses regarding human induced vibrationsIt is not too common among civil engineers in Sweden to perform comfort analyses considering the vibrations caused by human activities. In addition, the Swedish standards lack requirements to be used for comfort analyses in design of floor-systems. The demand for large spans in combination with slender slabs, is today a reason to investigate the floor-system constructions, in order to prevent disturbing vibrations and oscillations.The purpose of this thesis is to create a guide for how a comfort analysis, considering vibrations, should be implemented. Göran Svedenbjörk who is an expert in structural dynamics has been interviewed where he presents his latest project Värtaterminalen and answers some questions about vibrations due to human activities.Floor-systems, consisting of concrete slabs supported by steel or concrete beams, have been investigated with simulations in the finite element program Abaqus. In the simulations, the influence of various factors on the natural frequency of floor-systems and the acceleration level caused by dynamic loads, is studied.

I den här studien har vi tittat på hur utbildning, motivation och feedback påverkar arbetsprestationen hos ordningspoliser, men vi har även tittat på hur dessa faktorer påverkar varandra. En av frågeställningarna i arbetet har varit om en handdator med lathundar/checklistor skulle kunna vara ett bra arbetsredskap i polisarbetet, samt hur denna handdator skulle kunna påverka arbetsprestationen ur ett utbildnings-, motivations- och feedbackperspektiv. Vi har inte på något sätt skrivit en heltäckande studie över vad som påverkar dessa faktorer utan koncentrerat oss på hur en handdator skulle kunna fungera motiverande, utbildande och som en källa för feedback av det egna arbetet. Vår slutsats har blivit att vi tror att en handdator skulle kunna höja arbetsprestationen hos poliser i yttre tjänst som helhet och att vissa poliser skulle kunna få en ökad arbetskapacitet av att jobba med ett sådant hjälpmedel. Det finns dock många ytterliggare faktorer som påverkar som vi har utelämnat eller bara berört lätt i denna studie..

Hydroware Elevation Technology AB sells control and regulation equipment for hydraulic elevators. The company now wants to investigate the possibility of changing their present softstarters to frequency inverters to supply power to their pump engines. They also want to investigate the possibility of future use in so called ?intelligent? houses.The purpose of this report is to investigate these possibilities..

This thesis examines and measures differences in effciency between L1- and L2 language use for solving referential problems. Quantitative measures used in the study were time and error frequency. Qualitative measures, such as how the tasks and the participants own performance were experienced, were measured by an post interview and two questionaires. Two different tasks, a sorting task and a construction task, in which each informant was given the role as a constructor or instructor, were used for data gathering. A total of 20 dyads, divided in two language groups (English and Swedish) participated in the study.

Husums plant has a selection of different pulp pumps at bleaching plant 4 and 5. The displacement- (HC-pump, Sund Defibrator PTD-60) and centrifugalpumps (MC-pump, MCA 42-200, MCP 30/20) are of interest in this report. The centrifugal pumps are controlled by throttle valves, which result in an energy loss. Chemical mixers are used to mix ClO2 into the pulp before proceeding into a holding tower where the bleaching process occurs.The energy demand of the different positions has been measured or calculated to be used in comparisons against new equipment. Quotations were requested and delivered from Valmet and Sulzer.

The purpose of this study is to shine a light at the Swedish americans impressions and attitudes against the American society from the perspective of modernization and cultural attributes. This, with a reference frame of the deeply politically rooted European conception of America as a threat to the cultural well being, and as a thriving materialistic and progress bound constitution.The result shows that the attitudes against America in the descriptions were not all comparable with the conception that was conducted in Europe. However, the experiences altered whereas the study attends two different periods of time. The experiences differenced due to the growing exposure to cultural diversity and a modernization that grew faster in America than anywhere in the world. Not to mention the change of experiences and expectations that was with brought from a changing atmosphere in Sweden.

The aim of this study was to examine the students' perspectives on formative assessment, partly about how students perceived the assessment in general, partly about what students' opinions were on formative assessment, and partly about students' view of how assessment could be organized to stimulate learning process.  The study consisted of qualitative interviews with six students in grades one in an upper secondary school.The survey showed that students primarily perceived assessment with summative purpose: tests and scores.  Majority of the students experienced that there were too many tests occasions.  Those high-performing students were positive to tests.  However, those lower-performing students felt more negative and became more stressful with the exams.Results showed that they were lack of experience of formative assessment.  All the six students thought that they had not got any chance to involve in the assessments process.  They realized that they had not got adequate feedback about their learning-situations.  With regard to students' wishes about how assessment could be developed in order to improve their learning, it was mainly about more and concrete feedback on tests and assignments.Two models were developed in the final discussion, which showed the author's own perception of formative and summative assessments..

A power system will inevitably be subjected to transient overvoltages, most often produced by switching operations and lightning strikes. These transient overvoltages may harm sensitive equipment without sufficient protection, but it is not an easy task to predict what transients may occur or how they affect the system. A fault occurred in a low voltage system at Forsmark 2012 and overvoltages from lightning were concluded as the probable cause. The three aims with this thesis are to develop and test a model of the power system at Forsmark 3, analyse the transient behaviour of the system when subjected to lightning surges and identify critical parameters, and lastly to provide a tool for investigating the protection of the system. The modelling and simulations were performed in the freely available simulation program LT Spice.

Militärt ledarskap har tidigare utforskats inom en militär kontext. De senaste åren har många officerare slutat inom försvaret och blivit chefer inom det civila. Uppsatsen undersöker kvalitativt huruvida dessa chefer har nytta av erfarenheten från försvaret i sitt civila ledarskap. Detta görs utifrån en litteraturgenomgång av ledarskapsforskning och den militära kontexten. Tretton chefer på mellanchef till VD-nivå intervjuades i ett semistrukturerat format inspirerat av grundad teori.

For several years Uppsala University together with several companies has been involved in a WISENET project aimed at improving railway transport security. By placing a sensor system near the wheels of each wagon, the temperature of the bearings can be measured and transmitted to a collector placed centrally on the wagon. This in turn transmits the collected data to RFID receivers placed intermittently along the railway.As the signals are transmitted wirelessly, problems may occur as the antennas get dirty or coated with ice and snow. To determine the effects of these coatings, several tests were performed examining the reflection coefficient S11, the impedance Z11 and the efficiency eta of an antenna, and how they varied when various coatings were placed over the antenna. Examined coatings were ice, snow and water to determine the effects of weather, and various metal-based coatings: powdered iron both pure and partially oxidized, and iron ore granules.

Den övergripande frågeställningen för denna studie är hur arbetsmotivation påverkas av olika typer av belöningar. Gröjer & Gröjer (1988) s.13 definierar belöning på följande vis ?Med belöning avses arbetsgivarens ekonomiska och sociala uppskattning till individer eller kollektiv utöver vad som antingen betraktas som en normal ersättning för en prestation eller som en allmän förmån som gäller alla.? I denna studie undersöks hur chefer och medarbetare upplever belöningens påverkan på arbetsmotivationen. Sju intervjuer genomfördes på ett företag vars lönesystem bestod av en fast- och en rörlig del. Resultatet av undersökningen visade att det oftast inte är den ekonomiska belöningen som medarbetarna upplever som motiverande, snarare beröm, feedback, arbetstrivsel och utvecklingsmöjligheter.

Active headsets have been on the market for years and now it is time for something else to enter the stage. The technology of active noise reduction can for exmple also be used in ventilation systems for reducing ventilation noise. An active control system principally consists of four important components, namely the downstream error microphone, the upstream detection or reference microphone, the digital signal processor (DSP) and a loudspeaker. The upstream reference microphone listen to the primary ventilation noise and sends it to the DSP which makes a phase shift to the signal and sends it to the loudspeaker. The loudspeaker sends out the opposite waveform of the incoming one and reduce the primary ventilation noise.

Report of diploma work conducted at the Swedish Radiation Safety Authority (SSM) as part of the bachelors program in Nuclear Engineering at Uppsala University.All nuclear power plants in Sweden are obliged to report any deficiency in their barriers or the defense in depth in obedience to SSM?s regulations concerning safety in nuclear facilities. In addition, there is an international system for reporting such events. The purpose of this thesis is to study the Swedish report system and to analyze the differences between Swedish and international event reporting.In the Swedish system, SSM?s regulations are effectuated by means of event reports classified as category 1-3, designed individually at each Swedish facility.