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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Numerical modelling of ultra low frequency waves in Earth's magnetosphere

Elsden, Tom January 2016 (has links)
Ultra Low Frequency (ULF) waves are a ubiquitous feature of Earth's outer atmosphere, known as the magnetosphere, having been observed on the ground for almost two centuries, and in space over the last 50 years. These waves represent small oscillations in Earth's magnetic field, most often as a response to the external influence of the solar wind. They are important for the transfer of energy throughout the magnetosphere and for coupling different regions together. In this thesis, various features of these oscillations are considered. A detailed background on the history and previous study of ULF waves relevant to our work is given in the introductory chapter. In the following chapters, we predominantly use numerical methods to model ULF waves, which are carefully developed and thoroughly tested. We consider the application of these methods to reports on ground and spaced based observations, which allows a more in depth study of the data. In one case, the simulation results provide evidence for an alternative explanation of the data to the original report, which displays the power of theoretical modelling. An analytical model is also constructed, which is tested on simulation data, to identify the incidence and reflection of a class of ULF wave in the flank magnetosphere. This technique is developed with the aim of future applications to satellite data. Further to this, we develop models both in Cartesian and dipole geometries to investigate some of the theoretical aspects of the coupling between various waves modes. New light is shed on the coupling of compressional (fast) and transverse (Alfvén) magnetohydrodynamic (MHD) wave modes in a 3D dipole geometry. Overall, this thesis aims to develop useful numerical models, which can be used to aid in the interpretation of ULF wave observations, as well as probing new aspects of the existing wave theory.
42

Boksamtal för barn i sorg : Skildringar av döden i Roy och Alla döda små djur / Book calls for children in grief : Portrayals of death in Roy and All dead small animals

Gustafsson, Jonna January 2019 (has links)
Genom att jämföra två bilderböcker undersöker det här arbetet hur döden skildras i barnlitteratur. Den kvalitativa litteraturanalysen fokuserar på hur text och bild skildrar döden och huvudkaraktärens sorg, samt vilka budskap illustrationerna förmedlar. Böckerna som undersöks är ROY av Gro Dahle och Svein Nyhus som publicerades 2009 samt Alla döda små djur av Ulf Nilsson och Eva Eriksson som publicerades 2006. Utifrån tidigare forskning om barn i sorg och sorgebearbetning redovisas hur man som pedagog/lärare kan möta dessa barn. Med hjälp av analysverktyg för text och bild presenteras vidare hur dessa böcker kan användas för att bearbeta frågor och funderingar som elever har. Sammanfattningsvis presenteras hur böckerna kan användas i undervisning, genom boksamtal. / By comparing two picture books, this study examines how death is portrayed in children´s literature. The literature analysis focuses on how text and image depict death and the main characters grief, as well as what message the illustrations convey. The books that will be analysed are ROY by Gro Dahle and Svein Nyhus, which was published in 2009 and All dead small animals by Ulf Nilsson and Eva Eriksson, which was published in 2006. The study will show ways to teach children in grief, based on previous research on children in grief and sorrow processing. And with help from analysis tools, discusses how the books can be used in teaching, through book calls.
43

Nízkoúrovňová měření a vyhodnocení vlivu magnetických polí na lidský organismus, jeho chování a rozhodování / Measuring and Evaluating the Effects of Low-Level Magnetic Fields on Human Behavior and Decision-Making

Hanzelka, Michael January 2017 (has links)
Presents results of research in the field of low-level electromagnetic fields interacting with the higher organisms, in the frequency band from 0,01 to 30 Hz effect on the individual or social group. Provides a description of the methodology of measuring and evaluating the impact of workplace assembled measuring low-level electromagnetic fields, extremely low frequency (ELF) on a sample of respondents. It was proposed measuring device for monitoring and evaluating how respondents' reactions to changes in the geomagnetic or external - external magnetic / electromagnetic field and to work for the measurement and evaluation of changes in external magnetic fields very low levels (ELF). This work is designed to process and evaluate implemented within experimental research into the influence of low-level magnetic fields in the Earth's resonator psychophysiological parameters of human organism and its behavior and decision-making. The work confirmed the influence of low-level magnetic fields on the psychophysiological parameters of the organism to be simultaneously confirmed the hypothesis established in accordance with the objectives of work.
44

Varan-i-världen : Varan i form och innehåll i En dramatikers dagbok / Being-in-capitalism : The commodity in content and form in Diary of a Playwright

Stark Theander, Ellen January 2022 (has links)
This thesis explores the commodity as a motif in the first volume of Lars Norén’s Diary of a Playwright, as well as how this motif relates to reification and alienation, and in addition is reflected in the work formally. The study is oriented both towards the text’s depiction of the commodity and its reflections on its own depiction. These descriptions are read in light of Marxist theory and through comparisons with Walter Benjamin’s Passagenwerk, where the latter work also forms a connection to Martin Heidegger and Simone Weil in their capacity of important influences for Norén. Much like in the Passagenwek, the commodity acts as a secret structure in Diary of a Playwright. It organises the text and its seemingly disparate elements on a deeper level. The study contributes to a new understanding of one the greatest Swedish writers in the 20th and 21st centuries. Although the diary has not been the subject of much research, the predominant understanding of the work is, as with Norén’s other writings, largely characterised by a psychoanalytic perspective.
45

Är god redovisningssed fortfarande god sed?

Niklasson, Viktor, Olofsson, Carl-Oscar January 2013 (has links)
Sammanfattning Bokföringsnämnden (BFN) är en statlig myndighet under regeringen som är statens expertorgan på redovisningsområdet. De ansvarar för att främja utvecklingen av den goda redovisningsseden som enligt definitionen skall grundas utifrån praxis. Redovisningen har dock gått från att ha styrts utifrån principer och sed till att bli allt mer styrt av regler. På senare tid har nämligen BFN antagit en ny strategi genom att utfärda regelverk vilket de aldrig tidigare har gjort. De nya regelverken vid namn K-regelverken grundar sig i internationella redovisningsnormer och blir aktuella att tillämpa från 2014. Problematiken är att BFN inte har någon föreskriftsmakt utan endast får ge ut allmänna råd. Dessa uppfattas dock ofta som obligatoriska i praktiken vilket leder till att det uppstår en konflikt både gällande hur reglerna skall tolkas samt vad som gäller juridiskt. Vårt syfte är att förstå hur de kommande regelverken från bokföringsnämnden uppfattas samt hur de kommer att påverka företagen och den goda redovisningsseden. I uppsatsen använder vi oss av en kvalitativ studie med induktiv ansats. För att erhålla data på området har vi både samlat in primär och säkundärdata för att förstå och tolka helheten. I slutsatsen kommer vi fram till att den goda redovisningsseden har förändrats så pass mycket att den inte längre kan anses vara god sed. Finns det överhuvudtaget fortfarande ett behov av god redovisningssed då skrivna regler har tagit över det tomrum som den goda seden tidigare försökte fylla? Vi har även kommit fram till att K-regelverken inte kommer att resultera i en förenkling jämfört med dagens normgivning, inte heller kommer de administrativa kostnaderna att minska.

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