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Visar resultat 1 - 5 av 8 avhandlingar som matchar ovanstående sökkriterier.
1. Spectroscopic Studies of Isomers Produced in Relativistic Projectile Fragmentation and In-Flight Fission
Sammanfattning : This thesis is based on a number of experiments performed at the FRagment Separator (FRS) at the Gesellschaft für Schwerionenforschung mbH (GSI) in Darmstadt, Germany, in which heavy-ion reactions at relativistic energies have been used to produce nuclei far from stability. In April 1999 projectile fragmentation of 208Pb at 1 GeV/nucleon was used to study so called K-isomers in the neutron-rich isotopes of Lu (Z=71) to Hg (Z=80). LÄS MER
2. Transition delay in boundary-layer flows via reactive control
Sammanfattning : Transition delay in boundary-layer flows is achieved via reactive control of flow instabilities, i.e. Tollmien-Schlichting (TS) waves. Adaptive and model-based control techniques are investigated by means of direct numerical simulations (DNS) and experiments. LÄS MER
3. Methods for Aircraft Noise and Vibration Analysis
Sammanfattning : Aircraft noise control engineering is a challange both for experimentally based methods and for numerical analysis methods. Usually noise control installations are designed based on engineering judgement in combination with results from in-flight testing, rather than with nummerical methods, due to the absence of reliable and accurate models. LÄS MER
4. Tilted Foils Nuclear Spin Polarization and Measurement with Coulomb Excitation
Sammanfattning : Developing new experimental tools is essential to expand the possibilites of probing the structure of atomic nuclei. The better the currently known properties of nuclei can be manipulated, the more information can be extracted from data collected in nuclear reaction experiments. LÄS MER
5. Assessment of Aircraft Radar Cross-Section for Detection Analysis
Sammanfattning : Hiding from and surprising an opponent are tactics that have been used in warfare throughout history. They were features that aircraft originally possessed when they were first used in military operations. However, development of military technology is an endless struggle between advances in technology and counter technology. LÄS MER