Sökning: "Local Fourier Analysis"

Visar resultat 6 - 10 av 20 avhandlingar innehållade orden Local Fourier Analysis.

1. 6. X-ray structure analysis of short-chain dehydrogenases/reductases

   Författare :Jordi Benach-Andreu; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :crystal structure; short-chain dehydrogenases reductases; Drosophila alcohol dehydrogenase; catalytic reaction mechanism; Comamonas testosteroni 3[beta] 17[beta]hydroxysteroid dehydrogenase;

   Sammanfattning : X-ray crystallography and site-directed mutagenesis were used to better understand the structure/function relationships in the family of short-chain dehydrogenases/reductases (SDR). This group of enzymes constitutes a protein family with at least 60 members with highly diverse functions in pro- and eukaryotes. LÄS MER

3. 7. A neutron noise solver based on a discrete ordinates method

   Författare :Huaiqian Yi; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; diffusion synthetic acceleration; nuclear reactor modelling; deterministic neutron transport methods; neutron noise; convergence analysis; discrete ordinates;

   Sammanfattning : A neutron noise transport modelling tool is presented in this thesis. The simulator allows to determine the static solution of a critical system and the neutron noise induced by a prescribed perturbation of the critical system. The simulator is based on the neutron balance equations in the frequency domain and for two-dimensional systems. LÄS MER

4. 8. Uncharted Waters : Non-target analysis of disinfection by-products in drinking water

   Författare :Anna Andersson; David Bastviken; Henrik Kylin; David Reckhow; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Water treatment technologies; chemical disinfection; FT-ICR MS; bioassays; Vattenreningstekniker; klor; kloramin; FT-ICR MS; effektbaserad analys;

   Sammanfattning : Disinfection by-products (DBPs) are potentially toxic compounds formed when drinking water is treated with disinfectants, such as chlorine or chloramine. A large proportion of the exposure to DBPs is still unknown and the health risks observed through epidemiological studies cannot be explained by DBPs known today. LÄS MER

5. 9. On the evaluation of print mottle

   Författare :Carl-Magnus Fahlcrantz; Jan-Olof Eklundh; Jon Hardeberg; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mottle; Print quality; Texture; Image analysis; Perception; Computer science; Datalogi;

   Sammanfattning : Print Mottle is perhaps one of the most disturbing factors influencing overall Print Quality. Mottle has traditionally been evaluated by estimating the reflectance variation in the print. LÄS MER

7. 10. Potential Flow Panel Methods for the Calculation of Free-surface Flows with Lift

   Författare :Carl-Erik Janson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; desingularized; shape optimization; Rankine source; waves; OCTOPUS; dipole; MMA; Dawson operator; boundary layer; vortex; Method of Moving Asymptotes; nonlinear; sailing yacht; four point operator; surface piercing wing; Navier-Stokes; numerical method; lift force; raised panel method; discrete Fourier transform; collocation point shift; potential flow; CFD; free surface; induced drag; SHIPFLOW; dispersion; damping; analytical method; hydrofoil;

   Sammanfattning : Two non-linear Rankine-source panel methods are developed and implemented in the same computer code. The first method uses a four-point upwind operator on the free-surface to compute the velocity derivatives and to enforce the radiation condition while the second method uses an analytical expression for the velocity derivatives and a collocation point shift one panel upstream to prevent upstream waves. LÄS MER