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..

Vi som har skrivit arbetet har haft olika erfarenheter kring läsning av matematiska textuppgifter. Intresset växte, då vi blev intresserade kring varför det kan vara svårt att läsa en matematisk text. Syftet med studien är att undersöka hur elevers läsförståelse binds samman med läsning av matematiska textuppgifter samt se vilka inre och yttre faktorer som påverkar förståelsen. Kvalitativa intervjuer tillsammans med en kombination av fallstudier och observationer ligger till grund för metoden som använts i studien. I undersökningen deltog 63 elever och fyra lärare.

The aim of this two years master?s thesis in library and information science is to study how children and librarians recommend books through the website Barnens bibliotek. In the scope of this aim it also tries to answer the following questions: What qualities in books do children and librarians respectively emphasize when they write book recommendations? How do they formulate the recommendations? And finally, how do their respective recommendations differ?To examine these aspects a total of 50 book recommendations were chosen and analysed through an hermeneutic approach. Out of these 50, 30 were written by children and 20 were written by librarians.

This thesis is an investigation of Bosnian immigrants and their use of libraries in Borås and Anderstorp. The purpose of the thesis is to investigate if people from Bosnia read in their mother tongue Bosnian and if they read in Swedish too. The essay is based on questionnaires concerning both young and older immigrants' reading and library habits. The survey encompasses 30 Bosnians. In the theory I have described relevant literature and confirmed the importance of identity, language and culture for immigrants.

Syftet med denna uppsats är att undersöka analysverktyg med fokus på LUS (LäsUtvecklingsSchema) samt att söka kunskap om pedagogers nytta med användandet. Vi vill även ta reda på vilken hänsyn man som pedagog tar i användandet av analysverktyget, med tanke på elevers modersmål, tidigare erfarenheter och förståelse av skriftspråket. Genom att använda oss av relevant litteratur och enkäter med öppna frågor, vill vi ge ett kvalitativt resultat av problemområdet. De pedagoger som deltagit i studien har olika erfarenheter av LUS och kan därför ge en nyanserad bild av LUS i praktiken. Uppsatsen börjar med en bakgrund bestående av vilken betydelse läsning har i samhället, vad styrdokumenten säger samt beskrivning av analysverktyg.

The purpose of this study is to investigate the teachers? described experiences of advantages as well as disadvantages of Arne Trageton?s write to read-method (?ASL?) in contrast to the code-oriented traditional way of teaching. The aim of this study is furthermore to depict the teachers? opinions on whether they experience that the ASL-method is unfavourable for students in general. This study will also investigate the teachers? standpoint regarding choice of reading and writing method.

Abstract PurposeThis thesis aims to focus on how master students administer scholarly articles after they have found them. The purpose of the study is to detect how and to what extent people administer their articles from a personal information management-perspective (PIM).MethodTo answer the research questions, a web-based questionnaire survey was distributed which was announced to around 2,000 master students from different universities in Sweden. Most of the items in the survey focused on individual storage methods. The respondents were asked to rate the frequency of their different information administration behaviors on a seven level Likert-type-scale. Subsequently, items concerning specific information administration behaviors were posed, followed by questions on the respondent's sociodemographic status.

En kvalitativ studie kring några lärares tankar kring individuell utveckling och elevers delaktighet i sin egen utveckling begränsat till elever med läs och skrivsvårigheter i årskurs tre. för att genomföra den här studien har jag valt att intervjua fyra lärare med behörighet att undervisa elever i årskurs tre i ämnet svenska, dessa lärare valdes genom bekvämlighetsurval. Lärarna uttrycker att de arbetar relativt lika vad gäller IUP och elevers delaktighet men även att lärarna framhller vikten av att stödja eleverna och hjälpa dem på olika sätt för att de ska nå mlen för läsning och skrivning. Resultatet diskuteras utifrån Vygotskijs begrepp proximala utvecklingszonen som är ett centralt begrepp i studien..

In this thesis ? concerning didactics of literature ? I perform a reading and theoretical analysis of two pivotal works within reader-response theory, more precisely: Literature as Exploration (1938) and The Reader, the Text, the Poem ? The Transactional Theory of the Literary Work (1978), both written by Louise M. Rosenblatt. The object of this analysis is to examine whether Rosenblatts? theory and methodology can be used to accomplish understanding for ?the other?, what Martha C.

The development of five individual pupils? writing abilities, as reported by six of their teachers, is analysed. The thoughts and reflexions inspired by the everyday interaction between the teacher and the pupil suffering from some kind of reading and writing disability are presented. The purpose is to capture what was unique and characteristic in the measures that triggered a positive response in the pupils. Some of the questions answered in this study are: How does the phenomenon of reading and writing disabilities manifest itself in the classroom, and what are the consequences for the individual pupil of the various pedagogical measures available?One conclusion that may be drawn from this study is that there is no cut-and dried method for working with pupils suffering from reading and writing disabilities.

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.

AbstractWrite the most important things first in text that will be read by a scanning web user. This paper is based upon theories about? how we read? what style in texts is? how texts should be written for web pagesReading from computer screens is about 25 percent slower than reading from paper. This because screens? flicker? have lower resolution than paperAll text with the purpose of being read from a screen should be adjusted to the reader?s physical condition.

The purpose of this Master's Thesis is to explore the influence of fiction on the identity and self-esteem of young women. The purpose is also to investigate if there are any books that they consider to be of importance for their identity. Furthermore, I investigate what appeals to young women generally in fiction and if it is difficult for them to find books that appeal to them. The primary question posed in this thesis is: How does fiction influence the identity development of young women? The data collection is based on literature on the subject and on interviews with eight young women between 15 and 20 years old.