Sökning: "sources"

Visar resultat 1 - 5 av 3649 avhandlingar innehållade ordet sources.

  1. 1. Road traffic metals sources and emissions

    Detta är en avhandling från Kalmar

    Författare :David Hjortenkrans; Bo Bergbäck; Per-Arne Malmqvist; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Emission patterns; Heavy metals; Roadside soil; Sweden; Traffic; Sequential extractions; SFA; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; Environmental Chemistry; Miljökemi;

    Sammanfattning : As the environmental regulations and technical progress have forced the factories’ old “end of pipe” solutions to improve, the metal emissions from point sources have decreased. Instead, the diffuse consumption emissions from goods in use now are in focus. LÄS MER

  2. 2. Human listeriosis : sources and routes

    Detta är en avhandling från Örebro : Örebro universitet

    Författare :Vishal Singh Parihar; Marie-Louise Danielsson-Tham; Wilhelm Tham; Sukhadeo Barbuddhe; Carl Påhlsson; [2008]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Listeria monocytogenes; listeriosis; zoonoses; PFGE; food safety; incidence; MEDICINE; MEDICIN; Biomedicin; Biomedicine;

    Sammanfattning : The bacterium Listeria monocytogenes can cause the disease listeriosis in both humans and animals. For the epidemiological investigation of listeriosis detection and characterisation of the organism are important steps.Paper I. There are few reports on the incidence of L. LÄS MER

  3. 3. Predicting the sound field from aeroacoustic sources on moving vehicles Towards an improved urban environment

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Nicolas Pignier; Ciarán O'Reilly; Susann Boij; Michael Carley; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pass-by simulations; aeroacoustic sources; urban sound propagation; direct numerical beamforming; linear programming deconvolution; Kirchhoff approximation; moving sources; detached-eddy simulation; Ffowcs Williams-Hawkings; vehicle design; förbifartssimuleringar; aeroakustiska källor; urban ljudutbredning; direkt numerisk lobformning; avfaltning med hjälp av linjärprogrammering; Kirchhoffs approximation; rörliga källor; detached-eddy simulation; Ffowcs Williams-Hawkings; fordonsdesign; Farkostteknik; Vehicle and Maritime Engineering;

    Sammanfattning : In a society where environmental noise is becoming a major health and economical concern, sound emissions are an increasingly critical design factor for vehicle manufacturers. With about a quarter of the European population living close to roads with heavy traffic, traffic noise in urban landscapes has to be addressed first. LÄS MER

  4. 4. Aerosol Particle Sources Affecting the Swedish Air Quality at Urban and Rural Level

    Detta är en avhandling från Department of Physics, Lund University

    Författare :Adam Kristensson; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; wood combustion; traffic; long distance transport; nucleation; urban; background; PM2.5; PM10; source contribution; PIXE; Physics; Environmental technology; Fysik; pollution control; emissions; Aerosol particle; sources; Miljöteknik; kontroll av utsläpp; size distribution; Fysicumarkivet A 2005:Kristensson;

    Sammanfattning : During the last decades anthropogenic aerosol particles have attracted much attention due to their adverse health effects and their influence of climate change, and in Sweden, there are mainly three aerosol sources that affect the air quality; domestic wood combustion, traffic, and long distance transport, which includes new particle formation. This work concerns the characterization of these sources and an estimate of how much they contribute to the aerosol particle number (ToN) and mass concentrations (PM) in Swedish cities and at background locations. LÄS MER

  5. 5. Application of scattered sunlight spectroscopy for quantification of gas emissions from anthropogenic and natural sources

    Detta är en avhandling från Department of Physics, Lund University

    Författare :Claudia Rivera; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; anthropogenic sources; gas emission; volcanoes; sulphur dioxide; DOAS; nitrogen dioxide.; scattered sunlight spectroscopy; natural sources;

    Sammanfattning : Monitoring of gas emissions from natural and anthropogenic sources is of importance due to their negative effects on human health, atmospheric quality and ecosystems. Concern over air pollution has increased the need to develop measurement techniques suitable for gas flux determination. LÄS MER