Refine
Year of publication
- 2002 (250) (remove)
Institute
- Fachbereich Medizintechnik und Technomathematik (55)
- Fachbereich Energietechnik (33)
- Fachbereich Elektrotechnik und Informationstechnik (29)
- Fachbereich Wirtschaftswissenschaften (29)
- Fachbereich Luft- und Raumfahrttechnik (23)
- Fachbereich Maschinenbau und Mechatronik (22)
- Fachbereich Chemie und Biotechnologie (19)
- INB - Institut für Nano- und Biotechnologien (18)
- IfB - Institut für Bioengineering (13)
- Solar-Institut Jülich (10)
Document Type
- Article (167)
- Conference Proceeding (34)
- Book (32)
- Part of a Periodical (5)
- Part of a Book (3)
- Patent (3)
- Diploma Thesis (2)
- Report (2)
- Doctoral Thesis (1)
- Review (1)
Keywords
- Aachen University of Applied Sciences (5)
- Fachhochschule Aachen (5)
- Blitzschutz (3)
- Erneuerbare Energien (2)
- Lightning protection (2)
- Auto (1)
- Biomedizinische Technik (1)
- Bruchmechanik (1)
- CAD (1)
- CAD ; (1)
- Car (1)
- Direkter Blitzschlag (1)
- E-Learning (1)
- Einspielen <Werkstoff> (1)
- Elektromagnetischer Schutzschild (1)
- Energiecontrolling (1)
- Energierecht (1)
- Energy controlling (1)
- Erneuerbares Energiengesetz (1)
- Gasturbine (1)
- Hybridsystem (1)
- Induzierte Spannungen (1)
- Karosseriebau (1)
- Kawasaki (1)
- Kohlefeuerung (1)
- Kraftfahrzeug (1)
- Lightning (1)
- Lightning protection system (1)
- MAG-Schweißen (1)
- MIG-Schweißen (1)
- Magnetische Felder (1)
- Mechatronik (1)
- Micro turbine (1)
- Mikrogasturbine (1)
- Mikrosystemtechnik (1)
- Mikrotechnik (1)
- Oxidationsofen (1)
- Oxidschicht (1)
- Photolithographie (1)
- Photovoltaikanlage (1)
- Ratcheting (1)
- Reduktion <Chemie> (1)
- Renewable Energy (1)
- Risikoabschätzung (1)
- Risikoabwägung (1)
- Risikomanagement (1)
- Risk assessment ; Insurance (1)
- Risk management (1)
- Roboter (1)
- Roboter-Schweißen (1)
- Rohrreaktor (1)
- Schweißen (1)
- Shakedown (1)
- Spaltentlastung (1)
- Stahlbetonkonstruktion (1)
- Stickstoffoxide (1)
- Strömungsmaschine (1)
- Turbine (1)
- Versicherung (1)
- Windenergieanlage (1)
- Wirbelschichtfeuerung (1)
- car body construction (1)
- civil engineering (1)
- electromagnetic shielding (1)
- hybrid system (1)
- induced voltage (1)
- linear kinematic hardening (1)
- magnetic field (1)
- material shakedown (1)
- mechatronics (1)
- micro technology (1)
- micro-technical components (1)
- mikrotechnische Komponenten (1)
- multimediale Lernsoftware (1)
- nonlinear kinematic hardening (1)
- oxidation furnace (1)
- oxide coating (1)
- photovoltaic system (1)
- protection measures (1)
- ratchetting (1)
- reinforced concrete (1)
- renewable energy (1)
- risk assessment (1)
- shakedown (1)
- welded joint (1)
- welding (1)
- wind turbine (1)
The optimization of light output and energy resolution of scintillators is of special interest for the development of high resolution and high sensitivity PET. The aim of this work is to obtain statistically reliable results concerning optimal surface treatment of scintillation crystals and the selection of reflector material. For this purpose, raw, mechanically polished and etched LSO crystals (size 2×2×10 mm3) were combined with various reflector materials (Teflon tape, Teflon matrix, BaSO4) and exposed to a 22Na source. In order to ensure the statistical reliability of the results, groups of 10 LSO crystals each were measured for all combinations of surface treatment and reflector material. Using no reflector material the light output increased up to 551±35% by mechanical polishing the surface compared to 100±5% for raw crystals. Etching the surface increased the light output to 441±29%. The untreated crystals had an energy resolution of 24.6±4.0%. By mechanical polishing the surface it was possible to achieve an energy resolution of 13.2±0.8%, by etching of 14.8±0.7%. In combination with BaSO4 as reflector material the maximum increase of light output has been established to 932±57% for mechanically polished and 895±61% for etched crystals. The combination with BaSO4 also caused the best improvement of the energy resolution up to 11.6±0.2% for mechanically polished and 12.2±0.3% for etched crystals. Relating to the light output there was no significant statistical difference between the two surface treatments in combination with BaSO4. In contrast to this, the statistical results of the energy resolution have shown the combination of mechanical polishing and BaSO4 as the optimum.
Sterne und Weltraum
(2002)
The hybrid K+/Ca2+ sensor based on laser scanned silicon transducer for multi-component analysis
(2002)
Structural design analyses are conducted with the aim of verifying the exclusion of ratcheting. To this end it is important to make a clear distinction between the shakedown range and the ratcheting range. In cyclic plasticity more sophisticated hardening models have been suggested in order to model the strain evolution observed in ratcheting experiments. The hardening models used in shakedown analysis are comparatively simple. It is shown that shakedown analysis can make quite stable predictions of admissible load ranges despite the simplicity of the underlying hardening models. A linear and a nonlinear kinematic hardening model of two-surface plasticity are compared in material shakedown analysis. Both give identical or similar shakedown ranges. Structural shakedown analyses show that the loading may have a more pronounced effect than the hardening model.
Unbefristete Widerspruchsmöglichkeit des Schuldners im Einzugsermächtigungslastschriftverfahren
(2002)