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)
Coincident events in two scintillator crystals coupled to photomultipliers (PMT) are detected by processing just the digital data of the recorded pulses. For this purpose the signals from both PMTs are continuously sampled by free-running ADCs at a sampling rate of 40 MHz. For each sampled pulse the starting time is determined by processing the pulse data. Even a fairly simple interpolating algorithm results in a FWHM of about 2 ns.
Chancen im Maschinenbau
(2002)
The paper deals with the development of the probabilistic approach to the assessment of risk due to lightning. Sources of damage, types of damage and types of loss are defined and, accordingly, the procedure for risk analysis and the way of assessment of different risk components is proposed. The way to evaluate the influence of different protection measures (lightning protection system; shielding of structure, cables and equipment; routing of internal wiring; surge protective device) in reducing such probabilities is considered. The paper has been prepared within the framework of the activity of IEC TC81-WG9/CLC TC81-WG4 directed to prepare the draft IEC 62305-2 Risk Management, in cooperation with the Secretary of IEC/CLC TC81.
Anmerkung zu BGH VII ZR 135/00 (Widerklage gegen einen am Rechtsstreit nicht beteiligten Dritten)
(2002)
An experimental command and control information system based on Enterprise Java bean technology
(2002)
Abfallwirtschaft
(2002)
Aachen: Colourdome
(2002)
A small PET system has been built up with two multichannel photomultipliers, which are attached to a matrix of 64 single LSO crystals each. The signal from each multiplier is being sampled continuously by a 12 bit ADC at a sampling frequency of 40 MHz. In case of a scintillation pulse a subsequent FPGA sends the corresponding set of samples together with the channel information and a time mark to the host computer. The data transfer is performed with a rate of 20 MB/s. On the host all necessary information is extracted from the data. The pulse energy is determined, coincident events are detected and multiple hits within one matrix can be identified. In order to achieve a narrow time window the pulse starting time is refined further than the resolution of the time mark (=25 ns) would allow. This is possible by interpolating between the pulse samples. First data obtained from this system will be presented. The system is part of developments for a much larger system and has been created to study the feasibility and performance of the technique and the hardware architecture.
Within the developments for the Crystal Clear small animal PET project (CLEARPET) a dual head PET system has been established. The basic principle is the early digitization of the detector pulses by free running ADCs. The determination of the γ-energy and also the coincidence detection is performed by data processing of the sampled pulses on the host computer. Therefore a time mark is attached to each pulse identifying the current cycle of the 40 MHz sampling clock. In order to refine the time resolution the pulse starting time is interpolated from the samples of the pulse rise. The detector heads consist of multichannel PMTs with a single LSO scintillator crystal coupled to each channel. For each PMT only one ADC is required. The position of an event is obtained separately from trigger signals generated for each single channel. An FPGA is utilized for pulse buffering, generation of the time mark and for the data transfer to the host via a fast I/O-interface.
Macroporous silicon has been etched from n-type Si, using a vertical etching cell where no rear side contact on the silicon wafer is necessary. The resulting macropores have been characterised by means of Scanning Electron Microscopy (SEM). After etching, SiO₂ was thermally grown on the top of the porous silicon as an insulating layer and Si₃N₄ was deposited by means of Low Pressure Chemical Vapour Deposition (LPCVD) as transducer material to fabricate a capacitive pH sensor. In order to prepare porous biosensors, the enzyme penicillinase has been additionally immobilised inside the porous structure. Electrochemical measurements of the pH sensor and the biosensor with an Electrolyte/Insulator/Semiconductor (EIS) structure have been performed in the Capacitance/Voltage (C/V) and Constant capacitance (ConCap) mode.