TY  - CHAP
A1  - Gligorevic, Snjezana
A1  - Sorger, Ulrich
T1  - A new approach to tracking time-variant channels
T2  - Proceedings / 5th International Symposium on Wireless Personal Multimedia Communications : WPMC : October 27 - 30, 2002, Honolulu, Hawaii ; vol. 3
Y1  - 2002
SN  - 0-7803-7442-8
SN  - 1347-6890
SP  - 1342
EP  - 1345
ER  - 
TY  - JOUR
A1  - Artmann, Gerhard
A1  - Trzewik, Jürgen
A1  - Ates, M.
T1  - A novel method to quantify mechanical tension in cell monolayers. Trzewik, Jürgen; Ates, M., Artmann, Gerhard Michael
JF  - Biomedizinische Technik. 47 (2002), H. Suppl. 1. Pt. 1
Y1  - 2002
SN  - 0013-5585
N1  - Druckausgabe unter 63 Z 47 vorhanden
SP  - 379
EP  - 381
ER  - 
TY  - JOUR
A1  - Streun, M.
A1  - Brandenburg, G.
A1  - Larue, H.
A1  - Zimmermann, E.
A1  - Ziemons, Karl
A1  - Halling, H.
T1  - A PET system based on data processing of free-running sampled pulses
JF  - 2001 IEEE Nuclear Science Symposium Conference Record, Vol. 2
N2  - 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.
Y1  - 2002
SN  - 1082-3654
SP  - 693
EP  - 694
ER  - 
TY  - JOUR
A1  - Streun, M.
A1  - Brandenburg, G.
A1  - Larue, H.
A1  - Zimmermann, E.
A1  - Ziemons, Karl
A1  - Halling, H.
T1  - A PET system with free running ADCs
JF  - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
N2  - 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.
Y1  - 2002
SN  - 0168-9002
N1  - Proceedings of the 6th International Conference on Inorganic Scin tillators and their Use in Scientific and Industrial Applications
VL  - 486
IS  - 1-2
SP  - 18
EP  - 21
ER  - 
TY  - JOUR
A1  - Scheer, Nico
A1  - Riedl, Iris
A1  - Warren, J.T.
A1  - Kuwada, John Y.
A1  - Campos-Ortega, José A.
T1  - A quantitative analysis of the kinetics of Gal4 activator and effector gene expression in the zebrafish
JF  - Mechanism of Development
Y1  - 2002
U6  - http://dx.doi.org/10.1016/S0925-4773(01)00621-9
SN  - 0925-4773
VL  - 112
IS  - 1-2
SP  - 9
EP  - 14
ER  - 
TY  - JOUR
A1  - Naujokat, Anke
T1  - Aachen: Colourdome
JF  - Bauwelt. 93 (2002), H. 37
Y1  - 2002
SN  - 0931-6590
SP  - 2
ER  - 
TY  - JOUR
A1  - Mang, Thomas
T1  - Abdichtmaterialien gegen drückendes Wasser
JF  - Bauchemie von der Forschung bis zur Praxis : 3. Tagung Bauchemie in Würzburg ; 27./28. September 2001 in Würzburg / GDCh-Fachgruppe Bauchemie ; [Red.: W. Hiller ...]
Y1  - 2002
SN  - 3-936028-04-4
N1  - Tagung Bauchemie <3, 2001, Würzburg> GdCh-Monographie 24 ; Monographie / GDCh, Gesellschaft Deutscher Chemiker ; 24
SP  - 65
PB  - GDCh
CY  - Frankfurt am Main
ER  - 
TY  - JOUR
A1  - Biener, Ernst
T1  - Abfallwirtschaft
JF  - Bautechnische Zahlentafeln / Wendehorst. Hrsg.: Otto W. Wetzell. Bearb. von: Herwig Baumgartner ... - 30., akt. u.  erw. Aufl.
Y1  - 2002
SN  - 3-519-45002-X
SP  - 1155
EP  - 1187
PB  - Teubner
CY  - Stuttgart
ER  - 
TY  - CHAP
A1  - Bitz, Andreas
A1  - Alaydrus, M.
A1  - Streckert, J.
A1  - Hansen, V.W.
T1  - Absorption rates inside human body due to radiated electro-magnetic fields of multi-band base station antennas. Boundary value problems with electrically large and high-resolution bodies
T2  - 24th BEMS Annual Meeting, Quebec City, Quebec, Canada, 23 - 27 June 2002
Y1  - 2002
SP  - 40
EP  - 41
PB  - Bioelectromagnetics Society
CY  - Frederick, MD
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
A1  - Dylla, Frank
A1  - Lakemeyer, Gerhard
T1  - Acting and Deliberating using Golog in Robotic Soccer - A Hybrid Architecture / Dylla, Frank ; Ferrein, Alexander ; Lakemeyer, Gerhard
JF  - Proc. 3rd International Cognitive Robotics Workshop (CogRob 2002)
Y1  - 2002
SP  - 1
EP  - 7
ER  -