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.

The aim of this master?s thesis is to examine which ideas about the public library that appear in a selection of municipal library plans and to examine if these ideas are unanimous. The comprehensive questions are: Which ideas about the public library appear in each municipal library plan? How do the ideas agree in the different municipal library plans? The sub questions are: Which judgements of reality appear in the different library plans concerning each municipality and its library needs? How do the municipalities define the concept of development and future demands in the municipality on the basis of the judgements of reality? Which recommendations do the judgements of reality give and how is the plan of action that is established in each library plan justified? Which fundamental views of reality, i. e.

This report is a degree project performed at Freudenberg Household Products AB, (FHP). The degree project comprises measurement and analysis of the power net at FHP Basproduction. The content is divided between one theory-part, one document- part with measurements and also conclusions and a list of measures to be taken. During the project the purpose and restriction change from a quality investigation to only concentrate on harmonics and finding the reason why they exist, and also to find a solution to the problem with harmonics. The measurements shows that the power net contains harmonics of different order and intensity.

Huvudsakliga målet är att granska arbetsflödet för reklamföretag och leta efter de karakteristiska lösningarna som används dagligen och bildar ett digitalt reklamföretags pipeline samt hur de kan tänkas förbättras. Vi vill granska och jämföra de metoder och verktyg som spelar en fundamental nyckelroll i arbetsflödet för att se vilken av dessa metoder resulterar i optimal jämvikt mellan produktions hastighet och kvalitet..

During the development of microwave based sensors such as radar target seekers, input signals are needed to verify the performance of the system. Therefore, a channel board has been developed by previous thesis projects at Saab Bofors Dynamics. It uses a technique called Digital Radio Frequency Memory (DRFM). The purpose of this board is to sample and digitally store radio frequency signals in order to reconstruct them after a certain delay.The aim of this thesis project was to use the channel board named above to construct a portable instrument for generation of stimuli signals. This assignment has been divided into two tasks: firstly, to construct and put together the hardware components and secondly, to implement a graphical user interface for the instrument.

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.

The project was performed at SiemensIndustry Drive Technologies with theobjective to provide actual values forthe energy savings potential withinSiemens scope of practice.In Sweden the electrical drives standfor about 30 % of the total electricityconsumption and about 60 % of theelectricity consumption within theindustry. During the pre-study phaseelectrical drives with pump applicationswere identified as large energy users.Because of this a case study at one ofSiemens customers, Stora Enso Fors wasperformed. The system that was evaluatedduring the case study was a throttledsystem with a centrifugal pump forpumping pulp.The results yielded that a saving ofover 50 % could be achieved by replacingthe throttle valve with a variable speeddrive, a frequency converter. Thepayback period was two years and twomonths and the present value for thetotal life cycle cost of the variablespeed system was 662.566 SEK lower thanfor the throttled system. As aconsequence, Stora Enso Fors is advisedto invest in a frequency converter forregulation of the system.The general conclusion is that a focuson system efficiency is the mostimportant factor in energy efficiencyprojects and that the system regulationmethod has a large impact on the overallsystem losses and hence its efficiency.Energy efficiency potential forthrottled systems with centrifugal pumpsis large and significant economicalsavings can be made through investmentswith short payback time..

Syftet med föreliggande studie var att undersöka sambandet mellan subglottalt tryck och ljudtrycksnivå, och undersöka inverkan av kön och tonhöjd. Röststyrkan är starkt beroende av subglottalt tryck och sambandet har analyserats i ett flertal studier, som alla visar på ett linjärt förhållande mellan logaritmen av subglottala trycket och ljudtrycksnivån (SPL). Schutte (1980) analyserade sambandet för 21 kvinnor och  24 män som producerade ett stort antal mätdata med olika SPL och tonhöjd. Tryck mättes med ballong i esofagus. Tanaka & Gould (1982) analyserade 4 kvinnor och 6 män på tre ljudnivåer på bekväm tonhöjd; svag, normal och stark ljudstyrka.

The technological legacy from the early electrification of the Swedish railroads has resulted in a power grid with a lower grid frequency than the national power grid from which it is fed. Energy transfer between these power grids with different frequencies requires substations, adapting the grid frequency for the rail road power grid. For this purpose, a feeding power grid has been built, stretching across the country from Boden in the north to Tälle/Häggvik in the south.Power transfer in the Swedish power grid results in voltage angle differences which increase with increasing loads and transfer distance. These voltage angle differences are transferred from the power feeding substations to the rail road power grid, will in some extent cause loss of energy due to unwanted power flows from north to south.To minimize the losses due to this phenomenon, a power management system called EFS 132 kV has been developed and implemented. The system minimizes the unwanted power flows and controls the desired power flow for a good distribution of loads between the power feeding substations.This thesis investigates the extent of the transmission losses avoided due to the EFS 132 kV that coordinates the idling angles to a common reference point.The results indicate that EFS 132 kV affects the power flow, especially between the northern substations through an improved load distribution.

Difficult calvings and stillborn calves are costly for the producer and lowering these frequencies can decrease the costs for the dairy operation. Each calving in the herd is registered by the farmer and stored in a central database. The information is used to monitor the level of calving-difficulties and stillborn calves in the herd and nationally. Monitoring of these registrations is important to detect possible changes. Breeding-value prediction for calving traits is based on the calving information in the database.

We follow Torsten Brodén through his writings on Russell's Paradox. By comparing his work to that of his fellow colleagues at the time, we acquire an understanding of the context in which he wrote. Brodén is somewhat unique among contemporary mathematicans in his philosophical approach and thorough treatment of the most fundamental logical building blocks of set theory. With this mindset, he considers Russell's Paradox from a new point of view and believes himself to have successfully found a way to rid the world of it..

Allteftersom affärsvärlden har förändrats och blivit allt mer komplex har ävenföretagsförvärv blivit allt mer vanligt och behovet av företagsvärderingar ökat.Företagsvärderingar utförs i många olika situationer och för olika syften t.ex. i sambandmed sammanslagningar, vid värdering av aktier eller kreditgivning. I dessa situationerfinns även aktörer som alla har olika intentioner med värderingen. Därför finns det ettantal metoder och modeller att applicera vid en värdering.Denna studies syfte är att skapa tre olika typer av förståelse relaterat tillföretagsvärdering: förståelse för värderingsmodeller, förståelse för hur modellernaanvänds i praktiken samt förståelse för vad en god värderingsmodell är. Förståelsenskapas genom att studera litteratur, artiklar samt insamlat material från intervjuer medpersoner som arbetar med företagsvärdering i praktiken.Studien utförs med en kvalitativ metod samt en induktiv ansats eftersom dessa anseslämpliga för det ovan nämnda syftet.

The aim of this research is to examine the Göteborg International Film Festival Fund (GIFFF, 1998?2011) as a part of the festival's overall operations, to provide answers to questions about if/how the Fund can be understood as an expression of the festival's fundamental values, and how the Fund can be recognized within the festival's strategic development. The GIFFF is also discussed in relation to contemporary academic studies that interpret Western film funds for the developing countries ? such as Hubert Bals Fund and Fond Sud Cinéma ? as an expression of Eurocentrism.The investigation is based on the contemporary film festival research, previous academic studies on Göteborg International Film Festival, the festival?s printed material ? such as programs and press releases ? as well as interviews with the former festival director Gunnar Bergdahl, who initiated the Fund, and festival editor Ulf Sigvardson, who ran the Fund during its final years of existence.The conclusions are: The Fund's objectives ? such as to support filmmakers and film schools in the developing countries, and also to screen their films at the festival ? can be seen as a broader interpretation of the vision that was determined by the festival founders, that the festival should be a platform for independent filmmaking and also help screen the films that otherwise would not reach the Swedish audience. Also, the Fund was a significant part of the festival's expansion strategies during the 1990s.

This essay will cover the Swedish electoral system with a focus on the proportional representation andthe process involved from the conversion of votes to seats in the parliament. This process consists ofseveral methods which are created by political decisions as well as mathematical formulas and is notalways perfect in terms of equalization. An increment of six adjustment seats would have made thegeneral election of 2010 more proportioned. Despite this, the Swedish electoral system is wellconstructed and the essay will highlight areas which could be subject for improvement as well asexplaining fundamental concepts of the process..