TY - JOUR A1 - Kotliar, Konstantin A1 - Lanzl, Ines M. A1 - Witta, Birka A1 - Vilser, Walthard T1 - Reaktion retinaler Gefäßdurchmesser auf 100 % O2-Atmung - funktionelle Messung mit dem Retinal Vessel Analyzer an 10 Probanden / Lanzl, Ines M. ; Witta, Birke ; Kotliar, Konstantin ; Vilser, Walthard JF - Klinische Monatsblätter für Augenheilkunde. 217 (2000), H. 4 Y1 - 2000 SN - 1439-3999 N1 - = Retinal vessel reaction to 100 % O2 breathing - functional imaging by retinal vessel analyzer in 10 volunteers SP - 231 EP - 235 PB - - ER - TY - JOUR A1 - Taylor, J. G. A1 - Schmitz, N. A1 - Ziemons, Karl A1 - Grosse-Ruyken, M.-L. A1 - Gruber, O. A1 - Müller-Gärtner, H.-W. A1 - Shah, N. J. T1 - The network of brain areas involved in the motion aftereffect JF - Neuroimage N2 - A network of brain areas is expected to be involved in supporting the motion aftereffect. The most active components of this network were determined by means of an fMRI study of nine subjects exposed to a visual stimulus of moving bars producing the effect. Across the subjects, common areas were identified during various stages of the effect, as well as networks of areas specific to a single stage. In addition to the well-known motion-sensitive area MT the prefrontal brain areas BA44 and 47 and the cingulate gyrus, as well as posterior sites such as BA37 and BA40, were important components during the period of the motion aftereffect experience. They appear to be involved in control circuitry for selecting which of a number of processing styles is appropriate. The experimental fMRI results of the activation levels and their time courses for the various areas are explored. Correlation analysis shows that there are effectively two separate and weakly coupled networks involved in the total process. Implications of the results for awareness of the effect itself are briefly considered in the final discussion. Y1 - 2000 SN - 1053-8119 VL - 11 IS - 4 SP - 257 EP - 270 ER - TY - JOUR A1 - Fink, G. R. A1 - Marshall, J. C. A1 - Shah, N. J. A1 - Weiss, P.H. A1 - Halligan, P. W. A1 - Grosse-Ruyken, M. A1 - Ziemons, Karl A1 - Zilles, K. A1 - Freund, H. J. T1 - Line bisection judgments implicate right parietal cortex and cerebellum as assessed by fMRI JF - Neurology Y1 - 2000 SN - 1526-632X VL - 54 IS - 6 SP - 1324 EP - 1331 ER - TY - JOUR A1 - Bussmann, N. A1 - Engels, R. A1 - Fuss, L. A1 - Kemmerling, G. A1 - Reinartz, R. A1 - Langen, K.-J. A1 - Schelten, J. A1 - Ziemons, Karl T1 - Performance measurement of a new high resolution detector system for I-131 thyroid studies JF - 2000 IEEE Nuclear Science Symposium Conference Record, Vol. 3 N2 - A 2-dimensional detector system for high resolution thyroid I-131 scintigraphy was developed. It has a sensitive area of 4 cm×4 cm and consists of a lead-collimator and an array of 10×10 EGO crystals combined with a position sensitive photomultiplier. The spatial resolution and the sensitivity of the detector has been measured and compared to two commercially available gamma-cameras. Furthermore first patient measurements have been carried out Y1 - 2000 SN - 1082-3654 SP - 22/35 EP - 22/37 ER - TY - JOUR A1 - Streun, M. A1 - Brandenburg, G. A1 - Larue, H. A1 - Zimmermann, E. A1 - Ziemons, Karl A1 - Halling, H. T1 - Pulse recording by free-running sampling JF - 2000 IEEE Nuclear Science Symposium Conference Record, Vol. 2 N2 - Pulses from a position-sensitive photomultiplier (PS-PMT) are recorded by free running ADCs at a sampling rate of 40 MHz. A four-channel acquisition-board has been developed which is equipped with four 12 bit-ADCs connected to one FPGA (field programmable gate array). The FPGA manages data acquisition and the transfer to the host computer. It can also work as a digital trigger, so a separate hardware-trigger can be omitted. The method of free running sampling provides a maximum of information, besides the pulse charge and amplitude also pulse shape and starting time are contained in the sampled data. These informations are crucial for many tasks such as distinguishing between different scintillator materials, determination of radiation type, pile-up recovery, coincidence detection or time-of-flight applications. The absence of an analog integrator allows coping with very high count rates. Since this method is going to be employed in positron emission tomography (PET), the position of an event is another important information. The simultaneous readout of four channels allows localization by means of center-of-gravity weighting. First results from a test setup with LSO-scintillators coupled to the PS-PMT are presented Y1 - 2000 SN - 1082-3654 SP - 9/179 EP - 9/181 ER - TY - JOUR A1 - Meliß, Michael A1 - Späte, Frank T1 - The solar heating system with seasonal storage at the Solar-Campus Jülich JF - Solar energy. Vol. 69 (2000), iss. 6 Y1 - 2000 SN - 0038-092X SP - 525 EP - 533 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 - JOUR A1 - Gerigk, M. A1 - Maaß, D. A1 - Takors, Ralf A1 - Kreutzer, A. A1 - Wandrey, Christian A1 - Bongaerts, Johannes A1 - Wubbolts, Marcel T1 - Fermentative Herstellung von L-Phenylalanin im Fed-Batch Verfahren mit E. coli unter Einbindung eines integrierten Aufarbeitungsverfahrens JF - Chemie-Ingenieur-Technik (CIT) Y1 - 2000 SN - 1522-2640 (E-Journal); 0009-286X (Print) N1 - Printausg. in der Bibliothek vorhanden: 63 ZS 022 VL - Vol. 72 IS - Iss. 9 SP - 926 EP - 927 ER - TY - JOUR A1 - Brück, Stefan A1 - Sorger, Ulrich A1 - Gligorevic, Snjezana A1 - Stolte, Norbert T1 - Interleaving for outer convolutional codes in DS-CDMA systems JF - IEEE transactions on communications Y1 - 2000 SN - 0090-6778 VL - Vol. 48 IS - Iss. 7 SP - 1100 EP - 1107 ER - TY - JOUR A1 - Alt, Helmut T1 - Benchmark der Netznutzungspreise JF - Energiewirtschaftliche Tagesfragen : et ; Zeitschrift für Energiewirtschaft, Recht, Technik und Umwelt Y1 - 2000 SN - 0013-743X VL - Bd. 50 IS - H. 11 SP - 846 EP - 850 ER - TY - JOUR A1 - Kuperjans, Isabel A1 - Starke, M. A1 - Esser, J. A1 - [u.a.], T1 - Analyse und Konzeption von Energieanlagen unter ökologischen, wirtschaftlichen und technischen Gesichtspunkten JF - WLB : Umwelttechnik für Industrie und Kommune Y1 - 2000 SN - 0341-2679 VL - 44 IS - 11/12 SP - 26 EP - 29 ER - TY - JOUR A1 - Kuperjans, Isabel A1 - Esser, J. A1 - Meyer, Jörg A1 - Donner, O. T1 - Gestaltung und Bewertung von Energieanlagen unter ökologischen, wirtschaftlichen und technischen Gesichtspunkten JF - Umweltwirtschaftsforum : UWF Y1 - 2000 SN - 0943-3481 VL - 8 IS - 3 SP - 53 EP - 58 ER - TY - JOUR A1 - Dünnwald, Thomas A1 - Demir, Ayhan S. A1 - Siegert, Petra A1 - Pohl, Martina A1 - Müller, Michael T1 - Enantioselective Synthesis of (S)-2-Hydroxypropanone Derivatives by Benzoylformate Decarboxylase Catalyzed C−C Bond Formation JF - European journal of organic chemistry Y1 - 2000 SN - 0365-5490 (E-Journal); 1099-0690 (E-Journal); 0075-4617 (Print); 0170-2041 (Print); 0947-3440 (Print); 1434-193X (Print); 1434-243X (Print) VL - Vol. 2000 IS - Iss. 11 SP - 2161 EP - 2170 ER - TY - JOUR A1 - Iding, Hans A1 - Dünnwald, Thomas A1 - Greiner, Lasse A1 - Liese, Andreas A1 - Müller, Michael A1 - Siegert, Petra A1 - Grötzinger, Joachim A1 - Demir, Ayhan S. A1 - Pohl, Martina T1 - Benzoylformate Decarboxylase from Pseudomonas putida as Stable Catalyst for the Synthesis of Chiral 2-Hydroxy Ketones JF - Chemistry - a European journal Y1 - 2000 SN - 1521-3765 (E-Journal); 0947-6539 (Print) VL - Vol. 6 IS - Iss. 8 SP - 1483 EP - 1495 ER - TY - JOUR A1 - Wollert, Jörg T1 - Ethernet in der Automatisierungstechnik ; 1: Herkömmliche Feldbusse im Vergleich zu Ethernet JF - Elektronik : Fachmedium für industrielle Anwender und Entwickler Y1 - 2000 SN - 0013-5658 N1 - Printausg. in der Bibliothek vorhanden: 63 ZS 030 VL - Bd. 49 IS - H. 15 SP - 68 EP - 77 ER - TY - JOUR A1 - Wollert, Jörg T1 - Ethernet in der Automatisierungstechnik ; 2: Grenzen und Möglichkeiten des industriellen Ethernet-Einsatzes JF - Elektronik : Fachmedium für industrielle Anwender und Entwickler Y1 - 2000 SN - 0013-5658 N1 - Printausg. in der Bibliothek vorhanden: 63 ZS 030 VL - Bd. 49 IS - H. 21 SP - 66 EP - 75 ER - TY - JOUR A1 - Staat, Manfred T1 - Basis Reduction for the Shakedown Problem for Bounded Kinematic Hardening Material N2 - Limit and shakedown analysis are effective methods for assessing the load carrying capacity of a given structure. The elasto–plastic behavior of the structure subjected to loads varying in a given load domain is characterized by the shakedown load factor, defined as the maximum factor which satisfies the sufficient conditions stated in the corresponding static shakedown theorem. The finite element dicretization of the problem may lead to very large convex optimization. For the effective solution a basis reduction method has been developed that makes use of the special problem structure for perfectly plastic material. The paper proposes a modified basis reduction method for direct application to the two-surface plasticity model of bounded kinematic hardening material. The considered numerical examples show an enlargement of the load carrying capacity due to bounded hardening. KW - Finite-Elemente-Methode KW - Einspielen KW - Basis Reduktion KW - konvexe Optimierung KW - FEM KW - Druckgeräte KW - Basis reduction KW - Convex optimization KW - FEM KW - Shakedown analysis Y1 - 2000 ER - TY - JOUR A1 - Staat, Manfred T1 - Direct FEM Limit and Shakedown Analysis with Uncertain Data N2 - The structural reliability with respect to plastic collapse or to inadaptation is formulated on the basis of the lower bound limit and shakedown theorems. A direct definition of the limit state function is achieved which permits the use of the highly effective first order reliability methods (FORM) is achieved. The theorems are implemented into a general purpose FEM program in a way capable of large-scale analysis. The limit state function and its gradient are obtained from a mathematical optimization problem. This direct approach reduces considerably the necessary knowledge of uncertain technological input data, the computing time, and the numerical error, leading to highly effective and precise reliability analyses. KW - Finite-Elemente-Methode KW - Einspielen KW - FEM KW - Einspielanalyse KW - shakedown KW - limit load KW - reliability analysis KW - FEM KW - direct method Y1 - 2000 ER - TY - JOUR A1 - Bode, Jürgen A1 - Schlake, Thomas A1 - Iber, Michaela A1 - Schübeler, Dirk A1 - Seibler, Jost A1 - Snezhkov, Evgeney A1 - Nikolaev, Lev T1 - The transgeneticist's toolbox: novel methods for the targeted modification of eukaryotic genomes JF - Biological Chemistry Y1 - 2000 U6 - http://dx.doi.org/10.1515/BC.2000.103 SN - 1431-6730 VL - 381 IS - 9-10 SP - 801 EP - 813 ER - TY - JOUR A1 - Halbach, Thorsten A1 - Scheer, Nico T1 - Transcriptional activation by the PHD finger is inhibited through an adjacent leucine zipper that binds 14-3-3 proteins JF - Nucleic Acids Research Y1 - 2000 U6 - http://dx.doi.org/10.1093/nar/28.18.3542 SN - 1362-4962 VL - 28 IS - 18 SP - 3542 EP - 3550 ER -