Sökning: "sources"

Visar resultat 6 - 10 av 4425 avhandlingar innehållade ordet sources.

1. 6. Tracing and apportioning sources of dioxins using multivariate pattern recognition techniques

   Författare :Anteneh Assefa; Mats Professor; Karin Professor; Paul Professor; Patrik Andersson; Shigeki Masunaga; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polychlorinated dibenzo-p-dioxin; polychlorinated dibenzofuran; positive matrix fac- torization; PMF; principal component analysis; PCA; Baltic Sea; sediment core; PCDD F; sources; marine; fish; environmental half-live; peak year; peak level; temporal trend; spatial variation; coastal; offshore; chemical fingerprint; Environmental Science; miljövetenskap;

   Sammanfattning : High levels of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in edible fish in the Baltic Sea have raised health concerns in the Baltic region and the rest of Europe. Thus, there are urgent needs to characterize sources in order to formulate effective mitigation strategies. LÄS MER

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

   Författare :Adam Kristensson; Kärnfysik; []
   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

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

   Författare :Claudia Rivera; Chalmers tekniska högskola; []
   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

5. 9. Compact Soft X-Ray Microscopy : Sources, Optics and Instrumentation

   Författare :Per Takman; Hans Hertz; Janos Kirz; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; soft x-ray microscopy; water window; compact; laser plasma; liquid jet; zone plate optics; Physics; Fysik;

   Sammanfattning : This thesis describes the development of a sub-60-nm full-period resolution compact soft x-ray microscope operating in the water-window region (2.3-4.4 nm). Soft x-ray water-window microscopy is a powerful technique for high-resolution imaging of organic materials exploiting the natural contrast mechanism between carbon and oxygen, cf. LÄS MER

7. 10. The Town Plan of Jaipur : Its Sources and Narrations

   Författare :Mirja Juntunen; Claus Oetke; Siegfried Lienhard; Nalini Balbir; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; India; town plan; Jaipur; Indology; Indologi;

   Sammanfattning : Jaipur’s town plan has been the subject of a multitude of suggestions regarding its origin. Jaipur was founded by Jaisingh II in 1727, and has since then been the capital of the State of Rajasthan, India. LÄS MER