@article{HueningEifertLuekenetal.2002,
  author    = {H{\"u}ning, Felix and Eifert, T. and Lueken, H. and Schmidt, P.},
  title     = {High-temperature series expansion of the magnetic susceptibility of extended magnetic systems in a complete computer implementation / Eifert, T. ; H{\"u}ning, F. ; Lueken, H. ; Schmidt, P. ; Thiele, G.},
  series = {Chemical Physics Letters. 364 (2002), H. 1-2},
  journal   = {Chemical Physics Letters. 364 (2002), H. 1-2},
  publisher = {-},
  isbn      = {0009-2614},
  pages     = {69 -- 74},
  year      = {2002},
  language  = {en}
}
@article{HavermannSeilerGeorgeetal.2002,
  author    = {Havermann, Marc and Seiler, F. and George, A. and Leopold, F.},
  title     = {Enhanced Doppler Picture Velocimetry (DPV) for Planar Velocity Measurements in High-Speed Shock Tunnel Flow / Seiler, F. ; George, A. ; Leopold, F. ; Havermann, M. ; Srulijes, J.},
  series = {10th International Symposium on Flow Visualization : Kyōto, Japan, August 26 - 29, 2002 / sponsored by International Flow Visualization Society . [Chairman:] Toshio Kobayashi},
  journal   = {10th International Symposium on Flow Visualization : Kyōto, Japan, August 26 - 29, 2002 / sponsored by International Flow Visualization Society . [Chairman:] Toshio Kobayashi},
  publisher = {Visualization Society of Japan},
  address   = {Kyoto},
  isbn      = {4906497829},
  year      = {2002},
  language  = {en}
}
@book{Wolf2002,
  author    = {Wolf, Martin},
  title     = {Entwicklung und Evaluation eines Groupware-Systems zur Unterst{\"u}tzung verfahrenstechnischer Entwicklungsprozesse},
  publisher = {Shaker},
  address   = {Aachen},
  isbn      = {3-8322-0629-9},
  pages     = {X, 250 S. : graph. Darst.},
  year      = {2002},
  language  = {de}
}
@article{WolfFoltzSchlicketal.2002,
  author    = {Wolf, Martin and Foltz, Christian and Schlick, Christopher and Luczak, Holger},
  title     = {Development and evaluation of a groupware system to support chemical design processes / Wolf, Martin ; Foltz, Christian ; Schlick, Christopher ; Luczak, Holger},
  series = {International Journal of Human-Computer Interaction . 14 (2002), H. 2},
  journal   = {International Journal of Human-Computer Interaction . 14 (2002), H. 2},
  publisher = {-},
  isbn      = {1044-7318},
  pages     = {181 -- 198},
  year      = {2002},
  language  = {en}
}
@article{Pfeiffer2002,
  author    = {Pfeiffer, Johann},
  title     = {Gute Chancen im Maschinenbau},
  series = {Aachener Nachrichten / Aachener Zeitung : Sonderbeil. (2002)},
  journal   = {Aachener Nachrichten / Aachener Zeitung : Sonderbeil. (2002)},
  publisher = {-},
  year      = {2002},
  language  = {de}
}
@article{Pfeiffer2002,
  author    = {Pfeiffer, Johann},
  title     = {Gute Chancen im Maschinenbau},
  series = {Rheinische Post : Sonderbeil. (2002)},
  journal   = {Rheinische Post : Sonderbeil. (2002)},
  year      = {2002},
  language  = {de}
}
@article{Pfeiffer2002,
  author    = {Pfeiffer, Johann},
  title     = {Chancen im Maschinenbau},
  series = {Fachblatt : Journal der Fachhochschule Aachen . 2002 (2002), H. 1},
  journal   = {Fachblatt : Journal der Fachhochschule Aachen . 2002 (2002), H. 1},
  publisher = {-},
  pages     = {2},
  year      = {2002},
  language  = {de}
}
@article{HeinrichBlumBussmannetal.2002,
  author    = {Heinrich, U. and Blum, A. and Bussmann, N. and Engels, R. and Kemmerling, G. and Weber, S. and Ziemons, Karl},
  title     = {Statistical studies on the light output and energy resolution of small LSO single crystals with different surface treatments combined with various reflector materials},
  series = {Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},
  volume    = {486},
  journal   = {Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},
  number    = {1-2},
  issn      = {0168-9002},
  pages     = {60 -- 66},
  year      = {2002},
  abstract  = {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.},
  language  = {en}
}
@article{StreunBrandenburgLarueetal.2002,
  author    = {Streun, M. and Brandenburg, G. and Larue, H. and Zimmermann, E. and Ziemons, Karl and Halling, H.},
  title     = {A PET system with free running ADCs},
  series = {Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},
  volume    = {486},
  journal   = {Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},
  number    = {1-2},
  issn      = {0168-9002},
  pages     = {18 -- 21},
  year      = {2002},
  abstract  = {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.},
  language  = {en}
}
@article{StreunBrandenburgLarueetal.2002,
  author    = {Streun, M. and Brandenburg, G. and Larue, H. and Zimmermann, E. and Ziemons, Karl and Halling, H.},
  title     = {Coincidence detection by digital processing of free-running sampled pulses},
  series = {Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},
  volume    = {487},
  journal   = {Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},
  number    = {3},
  isbn      = {0168-9002},
  pages     = {530 -- 534},
  year      = {2002},
  abstract  = {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.},
  language  = {en}
}