TY - JOUR A1 - Ferrein, Alexander A1 - Dylla, Frank A1 - Lakemeyer, Gerhard T1 - Specifying Multirobot Coordination in ICPGolog - From Simulation towards Real Robots / Dylla, Frank ; Ferrein, Alexander ; Lakemeyer, Gerhard Y1 - 2003 N1 - AOS-4 at IJCAI-03 SP - 1 EP - 10 ER - TY - JOUR A1 - Öhlschläger, Peter A1 - Osen, Wolfram A1 - Dell, Kerstin A1 - Faath, Stefan T1 - Human papillomavirus type 16 L1 capsomeres induce L1-specific cytotoxic T lymphocytes and tumor regression in C57BL/6 mice / Öhlschläger, Peter ; Osen, Wolfram ; Dell, Kerstin ; Faath, Stefan ; Garcea Robert L: ; Jochmus, Ingrid ; Müller, Martin, Pawlita, JF - Journal of Virology. 77 (2003), H. 8 Y1 - 2003 SN - 1098-5514 SP - 4635 EP - 4645 ER - TY - JOUR A1 - Havermann, Marc A1 - Seiler, F. A1 - George, A. A1 - Leopold, F. T1 - Planar Velocity Visualization in High-Speed Wedge Flow using Doppler Picture Velocimetry (DPV) compared with Particle Image Velocimetry (PIV) / Seiler, F. ; Havermann, M. ; George, A. ; Leopold, F. ; Srulijes, J. JF - Journal of Visualization. 6 (2003), H. 3 Y1 - 2003 SN - 1343-8875 SP - 253 EP - 262 PB - - ER - TY - JOUR A1 - Kotliar, Konstantin A1 - Svetlova, O. V. A1 - Makarov, F. N. A1 - Zaseeva, M. V. T1 - Morfologicheskie i funktsional'nye osobennosti resnichnogo poiaska khrustalika kak kliuchevogo ispolnitel'nogo zvena v mekhanizme akkommodatsii glaza cheloveka = Morpho-functional characteristics of lens ciliary body as a key mechanism of accommodation in JF - Morfologiia (Saint Petersburg, Russia). 123 (2003), H. 3 Y1 - 2003 SN - 1026-3543 N1 - Original in Russisch, English abstract SP - 7 EP - 16 PB - - ER - TY - JOUR A1 - Dachwald, Bernd A1 - Schmidt, Tanja D. A1 - Seboldt, Wolfgang A1 - Auweter-Kurtz, T1 - Flight Opportunities from Mars to Earth for Piloted Missions Using Continuous Thrust Propulsion / Schmidt, Tanja D. ; Dachwald, Bernd ; Seboldt, Wolfgang ; Auweter-Kurtz, Monika Y1 - 2003 N1 - 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 20-23 July 2003, Huntsville, Alabama ; AIAA 2003-4573 SP - 1 EP - 9 PB - - ER - TY - JOUR A1 - Heinrichs, U. A1 - Pietrzyk, U. A1 - Ziemons, Karl T1 - Design optimization of the PMT-ClearPET prototypes based on simulation studies with GEANT3 JF - 2002 IEEE Nuclear Science Symposium Conference Record, Vol. 3 N2 - Within the Crystal Clear Collaboration four centres are developing 2nd generation high performance small animal PET scanners for different kinds of animals and medical applications. The first prototypes are PMT-based systems including depth of interaction (DOI) detection by using a phoswich layer of LSO and LuYAP. The aim of these simulation studies is to optimize sensitivity and spatial resolution of given designs, which vary in FOVs caused by different detector configurations (ring/octagon) and sizes. For this purpose the simulation tool GEANT3 (CERN) was used. The simulations have shown that all PMT designs with one-to-one coupling of crystals have a very nonlinear axial sensitivity profile. By shifting every other PMT 1/4 of a PMT length in axial direction the sampling of the FOVs became more homogeneous. At an energy threshold of 350keV the regression coefficient increases from 0.818 for the non-shifted to 0.993 for the shifted design. Simulations of a point source centred in the FOV (threshold: 350keV) resulted in sensitivities of 4.2% for a 4×20PMT (LSO/LuYAP a 10mm) and 3.8% for a 4×16PMT (LSO/LuYAP a 8mm) ring design. The 3D-MLEM reconstruction of a point source shows the enormous improvement of resolution using a crystal double layer with DOI (3.1mm at 40mm from CFOV) instead of a 20mm single layer (11.9mm). Y1 - 2003 SN - 1082-3654 SP - 682 EP - 686 ER - TY - JOUR A1 - Heinrichs, U. A1 - Pietrzyk, U. A1 - Ziemons, Karl T1 - Design optimization of the PMT-ClearPET prototypes based on simulation studies with GEANT3 JF - IEEE Transactions on Nuclear Science N2 - Within the Crystal Clear Collaboration (CCC), four centers are developing second generation high performance small animal positron emission tomography (PET) scanners for different kinds of animals and medical applications. The first prototypes are photomultiplier tube (PMT)-based systems including depth of interaction (DOI) detection by using a phoswich layer of lutetium oxyorthosilicate (LSO) and lutetium yttrium aluminum perovskite (LuYAP). The aim of these simulation studies is to optimize sensitivity and spatial resolution of given designs, which vary in fields of view (FOVs) caused by different detector configurations (ring/octagon) and sizes. For this purpose the simulation tool GEANT3 (CERN, Geneva, Switzerland) was used. Y1 - 2003 SN - 0018-9499 VL - 50 IS - 5 SP - 1428 EP - 1432 ER - TY - JOUR A1 - Streun, M. A1 - Brandenburg, G. A1 - Larue, H. A1 - Saleh, H. A1 - Zimmermann, E. A1 - Ziemons, Karl A1 - Halling, H. T1 - Pulse shape discrimination of LSO and LuYAP scintillators for depth of interaction detection in PET JF - 2002 IEEE Nuclear Science Symposium Conference Record, Vol. 3 N2 - A feasible way to gain the depth of interaction information in a PET scanner is the use of phoswich detectors. In general the layer of interaction is identified front the pulse shape of the corresponding scintillator material. In this work pulses from LSO and LuYAP crystals were investigated in order to find a practical method of distinguishing. It turned out that such a pulse processing could he kept simple due to an additional slow component in the light decay of the LuYAP pulse. At the same time the short decay time guarantees that the major amount of the light output is still collected within a short pulse recording time. Y1 - 2003 SN - 1082-3654 SP - 1636 EP - 1639 ER - TY - JOUR A1 - Streun, M. A1 - Brandenburg, G. A1 - Larue, H. A1 - Saleh, H. A1 - Zimmermann, E. A1 - Ziemons, Karl A1 - Halling, H. T1 - Pulse shape discrimination of LSO and LuYAP scintillators for depth of interaction detection in PET JF - IEEE Transactions on Nuclear Science N2 - A feasible way to gain the depth of interaction information in a positron emission tomography scanner is the use of phoswich detectors. In general, the layer of interaction is identified from the pulse shape of the corresponding scintillator material. In this work, pulses from LSO and LuYAP crystals were investigated in order to find a practical method of distinguishing. It turned out that such a pulse processing could be kept simple because of an additional slow component in the light decay of the LuYAP pulse. At the same time, the short decay time guarantees that the major amount of the light output is still collected within a short pulse recording time. Y1 - 2003 SN - 0018-9499 VL - 50 IS - 3 SP - 344 EP - 347 ER - TY - CHAP A1 - Ringbeck, Thorsten A1 - Albrecht, M. A1 - Frey, J. A1 - [u.a.], ED - Lerch, Reinhard T1 - Time-of-Flight 3D-camera for autonomous navigation and industrial automation T2 - Proceedings : 11th international conference, 13 - 15 May 2003, Exhibition Centre Nuremberg, Germany ; an event of the Association for Sensor Technology, AMA Y1 - 2003 N1 - Internationale Messe mit Kongress Sensor PB - AMA Service CY - Wunstorf/Germany ET - CD-ROM-Ausg. ER -