Sökning: "diffuse"

Visar resultat 1 - 5 av 532 avhandlingar innehållade ordet diffuse.

1. 1. Searching for an Ultra High-Energy Diffuse Flux of Extraterrestrial Neutrinos with IceCube 40

   Författare :Henrik Johansson; Christian Walck; Antoine Letessier-Selvon; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Neutrinos; UHE; diffuse; IceCube; Astroparticle physics; Astropartikelfysik; fysik; Physics;

   Sammanfattning : Neutrino astronomy has the potential to greatly improve our understanding of the high-energy universe. An unresolved, diffuse, flux of neutrinos is sensitive to the properties of the population of cosmic accelerators in the universe. LÄS MER

3. 2. Diffuse emissions from goods : influences on some societal end products

   Författare :Jennie Amneklev; Bo Bergbäck; Hans-Bertil Wittgren; Linnéuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arsenic; bismuth; CCA-treated wood; copper; material flow analysis; silver; substance flow analysis; urban flows; Miljövetenskap; Environmental Science;

   Sammanfattning : End products of society (e.g. sewage sludge and incineration ashes) can be used as indicators of the use of chemicals in consumer goods. Through upstream work the sources of substances released from goods may be identified before the emissions reach the end products. LÄS MER

4. 3. Quantitative diffuse reflectance spectroscopy : myocardial oxygen transport from vessel to mitochondria

   Författare :Tobias Lindbergh; Tomas Strömberg; Henrik Ahn; Marcus Larsson; Lise Lyngsnes Randeberg; Linköpings universitet; []
   Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

   Sammanfattning : In the field of biomedical optics, diffuse reflectance spectroscopy (DRS) is a frequently used technique for obtaining information about the optical properties of the medium under investigation. The method utilizes spectral difference between incident and backscattered light intensity for quantifying the underlying absorption and scattering processes that affects the light-medium interaction. LÄS MER

5. 4. Optical Analysis of biological media - continuous wave diffuse spectroscopy

   Författare :Jan Sørensen Dam; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; spatially resolved diffuse reflectance; in vitro diffuse spectroscopy; continuous wave techniques; Nuclear physics; multivariate data analysis.; Kärnfysik; Fysik; Physics; Medicin människa och djur ; Medicine human and vertebrates ; Monte Carlo simulations; light propagation models; multiple scattering; Tissue optics; tissue optical properties; Fysicumarkivet A:2000:Sörensen Dam;

   Sammanfattning : The main topic of this thesis is real-time quantification of relevant chromophores and light scattering elements in biological media. The presented methods and instrumentation are based on continuous wave (steady-state) optical measurements of (a) spatially-resolved diffuse reflectance from bulk media and (b) combined spatially-resolved and goniometric measurements of re-emitted light from thin samples. LÄS MER

7. 5. Structural health monitoring of concrete structures using diffuse waves

   Författare :Patrik Fröjd; Teknisk geologi; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; övervakning; ultraljud; betong; diffusa vågor; oförstörande provning; structural health monitoring; ultrasound; concrete; nondestructive testing; Civil engineering; diffuse waves;

   Sammanfattning : The work presented in this thesis has aimed to investigate and implement techniques for ultrasonic measurements in structural health monitoring applications for civil structures. The focus of the work has been to make these systems practical in real applications, where the large size of the structures, and the changing environments they are exposed to, pose problems for many methods which otherwise fare well in laboratory settings. LÄS MER