TY  - JOUR
A1  - Streun, M.
A1  - Brandenburg, G.
A1  - Larue, H.
A1  - Parl, C.
A1  - Ziemons, Karl
T1  - The data acquisition system of ClearPET neuro - a small animal PET scanner
JF  - IEEE Transactions on Nuclear Science
N2  - The Crystal Clear Collaboration has developed a modular system for a small animal PET scanner (ClearPET). The modularity allows the assembly of scanners of different sizes and characteristics in order to satisfy the specific needs of the individual member institutions. The system performs depth of interaction detection by using a phoswich arrangement combining LSO and LuYAP scintillators which are coupled to Multichannel Photomultipliers (PMTs). For each PMT a free running 40 MHz ADC digitizes the signal and the complete scintillation pulse is sampled by an FPGA and sent with 20 MB/s to a PC for preprocessing. The pulse provides information about the gamma energy and the scintillator material which identifies the interaction layer. Furthermore, the exact pulse starting time is obtained from the sampled data. This is important as no hardware coincidence detection is implemented. All single events are recorded and coincidences are identified by software. The system in Jülich (ClearPET Neuro) is equipped with 10240 crystals on 80 PMTs. The paper will present an overview of the data acquisition system.
Y1  - 2006
SN  - 0018-9499
VL  - 53
IS  - 3
SP  - 700
EP  - 703
ER  - 
TY  - JOUR
A1  - Khodaverdi, M.
A1  - Weber, S.
A1  - Streun, M.
A1  - Parl, C.
A1  - Ziemons, Karl
T1  - High resolution imaging with ClearPET™ Neuro - first animal images
JF  - 2005 IEEE Nuclear Science Symposium Conference Record, Vol. 3
N2  - The ClearPET™ Neuro is the first full ring scanner within the Crystal Clear Collaboration (CCC). It consists of 80 detector modules allocated to 20 cassettes. LSO and LuYAP:Ce crystals in phoswich configuration in combination with position sensitive photomultiplier tubes are used to achieve high sensitivity and realize the acquisition of the depth of interaction (DOI) information. The complete system has been tested concerning the mechanical and electronical stability and interplay. Moreover, suitable corrections have been implemented into the reconstruction procedure to ensure high image quality. We present first results which show the successful operation of the ClearPET™ Neuro for artefact free and high resolution small animal imaging. Based on these results during the past few months the ClearPET™ Neuro System has been modified in order to optimize the performance.
Y1  - 2006
SN  - 1082-3654
SP  - 1641
EP  - 1644
ER  - 
TY  - JOUR
A1  - Streun, M.
A1  - Brandenburg, G.
A1  - Khodaverdi, M.
A1  - Larue, H.
A1  - Parl, C.
A1  - Ziemons, Karl
T1  - Timemark correction for the ClearPET™ scanners
JF  - 2005 IEEE Nuclear Science Symposium Conference Record, Vol. 4
N2  - The small animal PET scanners developed by the Crystal Clear Collaboration (ClearPETtrade) detect coincidences by analyzing timemarks which are attached to each event. The scanners are able to save complete single list mode data which allows analysis and modification of the timemarks after data acquisition. The timemarks are obtained from the digitally sampled detector pulses by calculating the baseline crossing of the rising edge of the pulse which is approximated as a straight line. But the limited sampling frequency causes a systematic error in the determination of the timemark. This error depends on the phase of the sampling clock at the time of the event. A statistical method that corrects these errors will be presented
Y1  - 2006
SN  - 1082-3654
SP  - 2057
EP  - 2060
ER  - 
TY  - CHAP
A1  - Gerhards, Michael
A1  - Sander, Volker
A1  - Belloum, Adam
T1  - Seamlessly enabling the use of cloud resources in workflows
T2  - Cloud Computing 2013 : The Fourth International Conference on Cloud Computing, GRIDs, and Virtualization : May 27 - June 1, 2013 - Valencia, Spain
Y1  - 2013
SN  - 978-1-61208-271-4
SP  - 108
EP  - 114
PB  - Curren
CY  - Red Hook, NY
ER  - 
TY  - JOUR
A1  - Jens, Otto
A1  - Kaldenhoff, E.
A1  - Kirschner-Hermanns, R.
A1  - Mühl, Thomas
A1  - Klinge, Uwe
T1  - Elongation of textile pelvic floor implants under load is related to complete loss of effective porosity, thereby favoring incorporation in scar plates
JF  - Journal of biomedical materials research. Part A
N2  - Use of textile structures for reinforcement of pelvic floor structures has to consider mechanical forces to the implant, which are quite different to the tension free conditions of the abdominal wall. Thus, biomechanical analysis of textile devices has to include the impact of strain on stretchability and effective porosity. Prolift® and Prolift + M®, developed for tension free conditions, were tested by measuring stretchability and effective porosity applying mechanical strain. For comparison, we used Dynamesh-PR4®, which was designed for pelvic floor repair to withstand mechanical strain. Prolift® at rest showed moderate porosity with little stretchability but complete loss of effective porosity at strain of 4.9 N/cm. Prolift + M® revealed an increased porosity at rest, but at strain showed high stretchability, with subsequent loss of effective porosity at strain of 2.5 N/cm. Dynamesh PR4® preserved its high porosity even under strain, but as consequence of limited stretchability. Though in tension free conditions Prolift® and Prolift + M® can be considered as large pore class I meshes, application of mechanical strain rapidly lead to collapse of pores. The loss of porosity at mechanical stress can be prevented by constructions with high structural stability. Assessment of porosity under strain was found helpful to define requirements for pelvic floor devices. Clinical studies have to prove whether devices with high porosity as well as high structural stability can improve the patients' outcome.
Y1  - 2014
U6  - https://doi.org/10.1002/jbm.a.34767
SN  - 1552-4965
VL  - 102
IS  - 4
SP  - 1079
EP  - 1084
PB  - Wiley
CY  - New York
ER  - 
TY  - CHAP
A1  - Schwarzer, Klemens
A1  - Vieira, Maria Eugenia
A1  - Müller, Christoph
A1  - Lehmann, Harry
A1  - Coutinho, Lecimara
T1  - Modular solar thermal desalination system with flat plate collector
T2  - RIO 3 - World Climate & Energy Event : proceedings of the international conference held in Rio de Janeiro, Brazil, 1 -5 december 2003 / chief-ed.: Stefan Krauter ...
Y1  - 2003
SN  - 85-902710-2-1
SP  - 281
EP  - 286
PB  - Krauter
CY  - Rio de Janeiro
ER  - 
TY  - JOUR
A1  - Miyamoto, Ko-ichiro
A1  - Ichimura, Hiroki
A1  - Wagner, Torsten
A1  - Schöning, Michael Josef
A1  - Yoshinobu, Tatsuo
T1  - Chemical imaging of the concentration profile of ion diffusion in a microfluidic channel
JF  - Sensors and actuators. B: Chemical
N2  - The chemical imaging sensor is a device to visualize the spatial distribution of chemical species based on the principle of LAPS (light-addressable potentiometric sensor), which is a field-effect chemical sensor based on semiconductor. In this study, the chemical imaging sensor has been applied to investigate the ion profile of laminar flows in a microfluidic channel. The chemical images (pH maps) were collected in a Y-shaped microfluidic channel while injecting HCl and NaCl solutions into two branches. From the chemical images, it was clearly observed that the injected solutions formed laminar flows in the channel. In addition, ion diffusion across the laminar flows was observed, and the diffusion coefficient could be derived by fitting the pH profiles to the Fick's equation.
Y1  - 2013
U6  - https://doi.org/10.1016/j.snb.2013.04.057
SN  - 1873-3077 (E-Journal); 0925-4005 (Print)
N1  - Part of special issue "Selected Papers from the 26th European Conference on Solid-State Transducers"
VL  - 189
SP  - 240
EP  - 245
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Schütz, P.
A1  - Breuer, M.
A1  - Höfken, Hans-Wilhelm
A1  - Schuba, Marko
T1  - Malware proof on mobile phone exhibits based on GSM/GPRS traces
T2  - The Second International Conference on Cyber Security, Cyber Peacefare and Digital Forensic (CyberSec 2013) : 04.03. - 06.03.2013, Kuala Lumpur, Malaysia
Y1  - 2013
SN  - 978-0-9853483-7-3
SP  - 89
EP  - 96
PB  - The Society of Digital Information and Wireless Communication
ER  - 
TY  - JOUR
A1  - Bohrn, Ulrich
A1  - Mucha, Andreas
A1  - Werner, Frederik
A1  - Trattner, Barbara
A1  - Bäcker, Matthias
A1  - Krumbe, Christoph
A1  - Schienle, Meinrad
A1  - Stütz, Evamaria
A1  - Schmitt-Landsiedel, Doris
A1  - Fleischer, Maximilian
A1  - Wagner, Patrick
A1  - Schöning, Michael Josef
T1  - A critical comparison of cell-based sensor systems for the detection of Cr (VI) in aquatic environment
JF  - Sensors and actuators. B: Chemical
Y1  - 2013
SN  - 1873-3077 (E-Journal); 0925-4005 (Print)
VL  - Vol. 182
SP  - 58
EP  - 65
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Späte, Frank
A1  - Hafner, B.
A1  - Schwarzer, Klemens
T1  - A system for solar process heat for decentralized applications in developing countries
T2  - ISES 1999 Solar World Congress, Jerusalem, Israel, July 4-9, 1999 : conference proceedings / ed. Gershon Grossman. Vol. 3
Y1  - 2000
SN  - 0-080-043895-4
SP  - 236
EP  - 291
PB  - Elsevier
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Meliß, Michael
A1  - Neskakis, A.
A1  - Plettner-Marliani, J.
A1  - Lange, C.
A1  - Hövelmann, A.
A1  - Schumacher, J.
T1  - Waste water recycling supplied by renewable energies : basic conditions and possible treatment technologies
JF  - Renewable energy. Vol. 14 (1998), iss. 1-4. 6th Arab International Solar Energy Conference: Bringing Solar Energy into the Daylight, Muscat, Sultanate of Oman, 29.03.-01.04.1998
Y1  - 1998
SN  - 1879-0682 (E-Book); 0960-1481 (Print)
SP  - 325
EP  - 331
ER  - 
TY  - JOUR
A1  - Wemhöner, Carsten
A1  - Hafner, Bernd
A1  - Schwarzer, Klemens
T1  - Simulation of solar thermal systems with CARNOT blockset in the environment MATLAB-Simulink
Y1  - 2000
SP  - 1
EP  - 6
ER  - 
TY  - CHAP
A1  - Fredebeul-Krein, Markus
A1  - Steingröver, Markus
T1  - Enhancing broadband development and internet usages for improving networks and services in APEC member economies: Bridging the digital divide
T2  - The 19th ITS Biennial Conference 2012 “Moving Forward with Future Technologies: Opening a Platform for All” 18 - 21 November 2012, Thailand
Y1  - 2013
PB  - ITS
CY  - Bangkok
ER  - 
TY  - JOUR
A1  - Vitusevich, S. A.
A1  - Förster, Arnold
A1  - Lüth, H.
A1  - Belyaev, A. E.
A1  - Danylyuk, S. V.
A1  - Konakova, R. V.
A1  - Sheka, D. I.
T1  - Resonant spectroscopy of electric-field-induced superlattices
JF  - Journal of Applied Physics. 90 (2001), H. 6
Y1  - 2001
SN  - 1089-7550
U6  - https://doi.org/10.1063/1.1392956
SP  - 2857
EP  - 2861
ER  - 
TY  - JOUR
A1  - Stock, J.
A1  - Malindretos, J.
A1  - Indlekofer, K.M.
A1  - Pöttgens, Michael
A1  - Förster, Arnold
A1  - Lüth, Hans
T1  - A Vertical Resonant Tunneling Transistor for Application in Digital Logic Circuits
JF  - IEEE Transactions on Electron Devices (T-ED). 48 (2001), H. 6
Y1  - 2001
SN  - 0018-9383
SP  - 1028
EP  - 1032
ER  - 
TY  - JOUR
A1  - Schwarzer, Klemens
A1  - Schlenger, Barbara J.
T1  - Investigation of fission product aerosol behavior in an HTR containment during severe core-heatup accidents / Barbara J. Schlenger ; K. Schwarzer
JF  - Tagungsbericht : Maritim Kongresszentrum, 17. - 19. Mai '88 Travemünde / Kerntechnische Gesellschaft e.V.; Deutsches Atomforum e.V. [Red.: K. G. Bauer]
Y1  - 1988
SN  - 0720-9207
N1  - Jahrestagung Kerntechnik <1988, Lübeck-Travemünde> ; Annual Meeting of Nuclear Technology <1988, Lübeck-Travemünde>
SP  - 179
EP  - 182
PB  - Inforum
CY  - Bonn
ER  - 
TY  - JOUR
A1  - Hodel, U.
A1  - Orzati, A.
A1  - Marso, M.
A1  - Homann, O.
A1  - Fox, A.
A1  - Hart, A. v. d.
A1  - Förster, Arnold
A1  - Kordos, P.
A1  - Lüth, H.
T1  - A novel InAlAs/InGaAs layer structure for monolithically integrated photoreceiver
JF  - Conference Proceedings: 2000 International Conference on Indium Phosphide and related materials
Y1  - 2000
SN  - 0-7803-6320-5
N1  - International Conference on Indium Phosphide and Related Materials <12, 2000, Williamsburg, Va.>
SP  - 466
EP  - 469
PB  - IEEE Service Center
CY  - Piscataway, NJ
ER  - 
TY  - JOUR
A1  - Hoskens, R.C.P.
A1  - Roer, T.G. van de
A1  - Tolstikhin, V.I.
A1  - Förster, Arnold
T1  - Hot electron injection laser: vertically integrated transistor-laser structure for high-speed, low-chirp direct modulation
JF  - LEOS 2000 : 2000 IEEE annual meeting conference proceedings; 13th annual meeting; IEEE Lasers and Electro-Optics Society 2000 annual meeting; 13-16 November 2000, The Westin Rio Mar Beach, Rio Grande, Puerto Rico. Vol. 2
Y1  - 2000
SN  - 0-7803-5947-X
N1  - 2000 IEEE LEOS annual meeting
SP  - 444
EP  - 445
PB  - IEEE Service Center
CY  - Piscataway, NJ
ER  - 
TY  - JOUR
A1  - Hoskens, R. C. P.
A1  - Tolstikhin, V.I.
A1  - Förster, Arnold
A1  - Roer, T.G. van de
T1  - Vertically integrated transistor-laser structure, take 2
JF  - WOCSDICE  2000, 24th Workshop on Compound Semiconductor Devices and Integrated Circuits held in Europe : May 29 - June 02, 2000, Aegean Sea, Greece.
Y1  - 2000
SN  - 0970311109
N1  - WOCSDICE ; (24, 2000) Workshop on Compound Semiconductor Devices and Integrated Circuits held in Europe ; (24 : ; 2000.05.29-06.02)
PB  - Univ. of Michigan
CY  - Ann Arbor, Mich.
ER  - 
TY  - JOUR
A1  - Darmo, J.
A1  - Schäffer, F.
A1  - Förster, Arnold
A1  - Kordos, P.
T1  - Beryllium doped low-temperature-grown MBE GaAs: material for photomixing in the THz frequency range
JF  - ASDAM 2000 : conference proceedings / edited by Jozef Osvald ... [et al.]
Y1  - 2000
SN  - 0780359399
N1  - International Conference on Advanced Semiconductor Devices and Microsystems ; (3rd : ; 2000 : ; Smolenice, Slovakia)
SP  - 147
EP  - 150
PB  - IEEE
CY  - Piscataway, NJ
ER  -