Sökning: "spectral line structure"

Visar resultat 11 - 15 av 36 avhandlingar innehållade orden spectral line structure.

1. 11. Laboratory and Stellar Spectra in High Resolution: Studies of Fe, Pt and Tl in Peculiar Stars

   Författare :Gabriele Kalus; Fysiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; high-resolution spectroscopy; hyperfine structure; peculiar stars; iron; platinum; lead; upsilon Sagittarii; HR7775; chi Lupi; isotope shift; Atomic and molecular physics; Atom- och molekylärfysik; Fysicumarkivet A:1997:Kalus;

   Sammanfattning : The near-infrared spectrum of upsilon Sagittarii has been registered using the SOFIN high resolution spectrometer on the Nordic Optic Telescope, La Palma. For the first time 4f-5g transitions of Fe II in any astrophysical spectrum have been identified. LÄS MER

3. 12. Key Technologies in Low-cost Integrated Vehicle Navigation Systems

   Författare :Yueming Zhao; Lars E. Sjöberg; Milan Horemuž; Hossein Nahavandchi; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; GPS; INS; MEMS; error modelling; integration structure; lane detection; camera motion; balance adjustment; sensor array;

   Sammanfattning : Vehicle navigation systems incorporate on-board sensors/signal receivers and provide necessary positioning and guidance information for land, marine, airborne and space vehicles. Among different navigation solutions, the Global Positioning System (GPS) and an Inertial Navigation System (INS) are two basic navigation systems. LÄS MER

4. 13. Spectral Accuracy in Fast Ewald Methods and Topics in Fluid Interface Simulation

   Författare :Dag Lindbo; Anna-Karin Tornberg; Michael S. Siegel; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning :   This work contains two separate but related parts: one on spectrally  accurate and fast Ewald methods for electrostatics and viscous flow,  and one on micro- and complex fluid interface problems.  In Part I we are concerned with fast and spectrally accurate methods  to compute sums of slowly decaying potentials over periodic  lattices. LÄS MER

5. 14. Molecular observations at high and low redshifts with the Odin satellite

   Författare :Carina Persson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ISM: abundances -- ISM: molecules -- ISM: individual Orion KL -- ISM: individual S140 -- Radio lines: ISM -- Submillimeter -- Line: profiles -- Line: formation -- Cosmology: early Universe -- Cosmology: observations;

   Sammanfattning : The papers in this thesis have the aim of expanding our knowledge of different processes related to star formation in the early Universe and at present times. A complex chemistry occurs in star forming clouds and by observing molecules, information about the necessary physical and chemical conditions for star formation can be obtained. LÄS MER

7. 15. Chemical and dynamical study towards the UC HII region Monoceros R2

   Författare :Sandra Treviño Morales; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Star formation — Interstellar medium — Filamentary structure — Dynamics — Chemistry — Photon-dominated regions — Monoceros R2.;

   Sammanfattning : One of the first signposts of high-mass star formation is the presence of compact regions of ionized gas (called HII regions), surrounded by layers of atomic and molecular gas (photon-dominated regions or PDRs). The study of the properties (e. g. LÄS MER