Search for dissertations about: "number concentration"

Showing result 1 - 5 of 720 swedish dissertations containing the words number concentration.

  2. 1. Concentration measurements in single particle microscopy

    Author : Magnus Röding; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; diffusion; fluorescence microscopy; nanoparticle characterization; number concentration; optical wide-field microscopy; single particle tracking; Smoluchowski process; diffusion;

    Abstract : The topic of this thesis is the introduction of two novel methods for using single particle microscopy as a tool for absolute number concentration measurements of Brownian particles. The key idea of both methods is that in order to estimate number concentration, the size of the (three-dimensional) particle detection region has to be estimated. READ MORE

  4. 2. Changing population distribution in Sweden : long term trends and contemporary tendencies

    Author : Johan Håkansson; Umeå universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Population distribution; redistribution; Sweden; geographical levels; concentration; dispersion; accessibility; migration; natural population change; age composition;

    Abstract : The aim of the thesis is to describe and analyse the population redistribution in Sweden at different geographical levels from the beginning of the 19th century to the end of the 20th century. The analysis is approached in three different ways. First, the redistribution at different geographical levels is analysed (papers I and II). READ MORE

  5. 3. Determination of VOC Emissions from Surface Coatings by Environmental Test Chamber Measurements

    Author : Alireza Afshari; RISE; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chamber; surface coating; emission rate; measurement; VOC; concentration;

    Abstract : The emitting properties of different building materials are obtained by measurements in environmental chambers of a few established designs. In order to interpret the results from the measurements and to predict the influence on the indoor environment, it is necessary to have a good understanding of the parameters governing the emission process. READ MORE

  6. 4. Infrared Laser-Induced Grating Techniques for Diagnostics in Reactive Flows

    Author : Dina Hot; Förbränningsfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Laser diagnostics; infrared; laser-induced grating spectroscopy; degenerate four-wave mixing; flames; temperature; concentration; Fysicumarkivet A:2020:Hot;

    Abstract : AbstractThe work presented in this thesis is mainly focused on the development andapplication of infrared laser-induced grating techniques in order to measure the gasphase temperature and species concentrations in reactive flows. The two techniquesused for this purpose are laser-induced grating spectroscopy (LIGS) and degeneratefour-wave mixing (DFWM). READ MORE

  7. 5. Volatility and number measurement of diesel engine exhaust particles

    Author : Hanna Bernemyr; Hans-Erik Ångström; Nigel Clark; KTH; []
    Keywords : particle emissions; measuring methods; particle number measurements; dilution; rotating disc diluter; v-TDMA; TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : Today, emission legislations for engine exhaust particles are mass based. The engines of today are low-emitting with respect to particle mass, with the emissions approaching the detection limit of the current measurement method. This calls for new and improved measurement methods. READ MORE