Sökning: "Dispersion"

Visar resultat 6 - 10 av 887 avhandlingar innehållade ordet Dispersion.

1. 6. Dispersion modelling of volcanic emissions

   Författare :Adam Dingwell; Rutgersson Anna; David Simpson; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; dispersion modelling; atmospheric; volcano; gas emissions; volcanic ash; FLEXPART; FLEXPART-WRF; Spridningsmodellering; atmosfär; vulkan; gasutsläpp; vulkanaska; FLEXPART; FLEXPART-WRF; Meteorology; Meteorologi;

   Sammanfattning : Gases and particles released by volcanoes pose a serious hazard to humans and society. Emissions can be transported over long distances before being reduced to harmless concentrations. Knowing which areas are, or will be, exposed to volcanic emissions is an important part inreducing the impact on human health and society. LÄS MER

3. 7. In the Pipe or End of Pipe? : Transport and Dispersion of Water-borne Pollutants and Feasibility of Abatement Measures

   Författare :Christoffer Carstens; Vladimir Cvetkovic; Auli Niemi; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Contaminant transport modelling; Groundwater; Dispersion; Wave power; Eutrophication;

   Sammanfattning : Eutrophication is one of the key environmental problems of today, both in terms of complexity and magnitude. For the Baltic Sea (BS), eutrophication is an acute problem, leading to hypoxic conditions at the bottom; a situation that is sustained and amplified, when phosphorus is released from hypoxic sediments. LÄS MER

4. 8. Long-range intermolecular dispersion forces and circular dichroism spectra from first-principles calculations

   Författare :Auayporn Jiemchooroj; Bo Sernelius; Patrick Norman; Kenneth Ruud; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; van der Waals forces; dispersion forces; dispersion coefficients; polarizability; electronic circular dichroism; Physics; Fysik;

   Sammanfattning : This work presents first-principles calculations of long-range intermolecular dispersion energies between two atoms or molecules and of electronic circular dichroism spectra of chiral molecules. The former is expressed in terms of the C6 dipole-dipole dispersion coefficients Δε, and the latter is given in terms of the extinction coefficient. LÄS MER

5. 9. Robust Design Experimentation and Dispersion Effects

   Författare :Martin Arvidsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; estimation procedure; design of experiments; generalized linear models; event matrices; variance component; location effects; split-plot experiments; robust design; identification procedure; dispersion effects;

   Sammanfattning : One of the most common methods in robust design methodology is design of experiments. This method makes it possible to identify settings of design factors that make products and production processes robust with respect to noise factors. LÄS MER

7. 10. Sequence and dispersion of repolarization of the right atrium: Implications of repolarization disturbance in atrial fibrillation

   Författare :Zhen Li; Kardiologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Kardiovaskulära systemet; Cardiovascular system; electroanatomical mapping; monophasic action potential; atrial fibrillation; repolarization; dispersion;

   Sammanfattning : To explore the global sequence and dispersion of repolarization of the right atrium, monophasic action potentials (MAPs) were sequentially recorded from the right atrium using an electroanatomical mapping (CARTO) system in 10 healthy pigs and in 10 patients with (n=6) and without (n=4) paroxysmal atrial fibrillation (PAF) during sinus rhythm, or using two MAP recording catheters in 30 patients with or without PAF (n=15 each) during sinus rhythm, pacing, and programmed stimulation. The dispersion of activation time (AT), repolarization time (RT) and MAP duration (MAPd) were analyzed. LÄS MER