Browsing Naturwissenschaften, Mathematik und Informatik by Title
Now showing items 3881-3900 of 5496
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Radial velocities in low mass stars: improving the wavelength solution of astronomical spectrographs and understanding stellar noise
(2017-11-10)The radial velocity method has been used to discover hundreds of extrasolar planets in the past two decades. The continuous improvements in radial velocity precision have revealed several rocky planets in the habitable ... -
Radiation conditions for periodic potentials
(2017-09-19)The aim of the present thesis is to determine radiation conditions for higher-dimensional Schroedinger equations with periodic potentials. There is well-known result for Helmholtz equations. However to my knowledge, there ... -
Radiation Hard 3D Diamond Sensors for Vertex Detectors at HL-LHC
(2016-02-12)Diamond is a good candidate to replace silicon as sensor material in the innermost layer of a tracking detector at HL-LHC, due to its high radiation tolerance. After particle fluences of $10^{16}\,{\rm protons/cm^2}$, ... -
Radiation length measurements with high-resolution telescopes
(2019-08-27)The radiation length imaging method presented in this work can be used to conduct spatially resolved measurements of scattering angles of particles traversing a object under study. For the measurements a planar object is ... -
Radiative Corrections in Curved Spacetime and Physical Implications to the Power Spectrum and Trispectrum for different Inflationary Models
(2018-06-26)In a quantum field theory with a time-dependent background, as in an expanding universe, the time-translational symmetry is broken. We therefore expect loop corrections to cosmological observables to be time-dependent after ... -
Radical Polymerization Kinetics in Systems with Transfer Reactions Studied by Pulsed-Laser-Polymerization and Online EPR-Detection
(2011-11-22)The SP-PLP-EPR technique has been developed for very detailed kinetic investigations into radical polymerization. The method which combines single-pulse-pulsed-laser-polymerization (SP-PLP) ... -
Radical Polymerization Kinetics of Non-Ionized and Fully-Ionized Monomers Studied by Pulsed-Laser EPR
(2016-06-29)The radical polymerization kinetics of non-ionized and fully-ionized monomers in organic and aqueous solution was investigated by SP–PLP–EPR, i.e., highly time-resolved single-pulse–pulsed-laser–polymerization (SP–PLP) in ... -
Radio-frequency controlled low-energy electron pulses
(2024-08-23)Electron beams are invaluable for probing material structures and dynamic processes due to their large scattering cross sections and the versatility of tunable electron optics for diffraction and microscopy. Pulsed electron ... -
RAFT-Polymerisation an Oberflächen
(2007-07-24)Heterogeneous Reversible Addition-Fragmentation Chain Transfer (RAFT) polymerizations using solid-supported dithiobenzoates, trithiocarbonate, and xanthates, respectively, using nanometer-sized ... -
Rainfall partitioning and soil water dynamics along a tree species diversity gradient in a deciduous old-growth forest in Central Germany
(2010-09-06)Species diversity effects have been extensively investigated in grassland ecosystems, however, little is known about the influence of tree species diversity on the forest water cycle. ... -
Rainfall partitioning in differently used montane rainforests of Central Sulawesi, Indonesia
(2007-01-31)This study was conducted within the project 'Stability of Rainforest Margins in Indonesia' (STORMA) along the margins of the Lore Lindu National Park in Central Sulawesi, Indonesia. The ... -
Raman spectroscopy in Geobiology - Advances in detection and interpretation of organic signatures in rocks and minerals
(2014-01-21)In this thesis, Raman spectroscopy was applied to a broad range of rock types in order to test the ability of detecting and interpreting organic signals. In the field of geobiology Raman spectroscopy is relatively new, and ... -
Raman-Spektroskopie kleiner Moleküle und Molekülaggregate im Überschallstrahl nach thermischer Anregung
(2015-07-06)Small molecules and clusters have been characterized by spontaneous Raman scattering in a supersonic expansion. It is shown how vibrational and rotational temperatures in the jet can be determined using the Stokes/anti-Stokes ... -
Ramanspektroskopische Untersuchung der Esterfaltung in Überschallexpansionen, Oder: Wie man bei der Suche nach der Haarnadel im Esterhaufen fünf auf einmal findet
(2022-06-29)The conformational preference of linear alkyl chains with an ester group in the center was investigated using Raman spectroscopy in supersonic expansions. Like alkanes, short esters prefer a stretched conformation, but ... -
Ramanujan Regular Hypergraphs based on special Affine Bruhat-Tits Buildings
(2004-02-11)This dissertation is mainely about Ramanujan graphs and Hypergraphs, which are constracted with arithmetical tools. The unitgroups of Quaternions and division algebras play an important ... -
Ramularia collo-cygni an Gerste
(2011-07-04)A differentiation tool for symptomatically similar barley diseases developed in the course of researching this doctoral dissertation has wide practical applicability. However, R. collo-cygni ... -
Random Block Copolymer Melts in the Bulk and at Selective Substrates
(2011-12-15)Random block copolymers are polymers that consist of two different, randomly as- sembled types of blocks. Each of these blocks comprises one type of monomer and a repulsion between these ... -
Random Focusing of Tsunami Waves
(2015-11-09)Branched flow is a universal phenomenon of random focusing that occurs in wave or particle flows that propagate in weakly scattering, correlated random media. The consecutive effect of small random forces leads to regions ... -
Random Function Iterations for Stochastic Feasibility Problems
(2019-03-21)The aim of this thesis is to develop a theory that describes errors in fixed point iterations stochastically, treating the iterations as a Markov chain and analyzing them for convergence in distribution. These particular ...