TY  - JOUR
A1  - Dachwald, Bernd
A1  - Carnelli, Ian
A1  - Vasile, Massimiliano
T1  - Evolutionary Neurocontrol: A Novel Method for Low-Thrust Gravity-Assist Trajectory Optimization / Carnelli, Ian ; Dachwald, Bernd ; Vasile, Massimiliano
JF  - Journal of guidance control and dynamics. 32 (2009), H. 2
Y1  - 2009
SN  - 0731-5090
SP  - 616
EP  - 625
PB  - AIAA
CY  - Reston, Va.
ER  - 
TY  - CHAP
A1  - Gehler, M.
A1  - Ober-Blöbaum, S.
A1  - Dachwald, Bernd
T1  - Application of discrete mechanics and optimal control to spacecraft in non-keplerian motion around small solar system bodies
T2  - Procceedings of the 60th International Astronautical Congress
N2  - Prolonged operations close to small solar system bodies require a sophisticated control logic to minimize propellant mass and maximize operational efficiency. A control logic based on Discrete Mechanics and Optimal Control (DMOC) is proposed and applied to both conventionally propelled and solar sail spacecraft operating at an arbitrarily shaped asteroid in the class of Itokawa. As an example, stand-off inertial hovering is considered, recently identified as a challenging part of the Marco Polo mission. The approach is easily extended to stand-off orbits. We show that DMOC is applicable to spacecraft control at small objects, in particular with regard to the fact that the changes in gravity are exploited by the algorithm to optimally control the spacecraft position. Furthermore, we provide some remarks on promising developments.
KW  - Spacecraft
Y1  - 2009
SN  - 978-161567908-9
N1  - 60th International Astronautical Congress 2009, IAC 2009; Daejeon; South Korea; 12 October 2009 through 16 October 2009
SP  - 1360
EP  - 1371
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Demirci, Taylan
A1  - Kurulgan Demirci, Eylem
A1  - Trzewik, Jürgen
A1  - Linder, Peter
A1  - Digel, Ilya
A1  - Artmann, Gerhard
A1  - Sakizli, Meral
A1  - Temiz Artmann, Aysegül
T1  - Gene expression profile analysis of 3T3/NIH fibroblasts after one hour mechanical stress
JF  - IUBMB Life. 61 (2009), H. 3
Y1  - 2009
SN  - 1521-6543
N1  - Abstracts: Turkish Society of Molecular Medicine, Third International Congress of Molecular Medicine, May 5-8, 2009, Istanbul, Turkey
SP  - 311
EP  - 312
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Digel, Ilya
A1  - Dachwald, Bernd
A1  - Artmann, Gerhard
A1  - Linder, Peter
A1  - Funke, O.
T1  - A concept of a probe for particle analysis and life detection in icy environments
Y1  - 2009
N1  - International workshop “Europa lander: science goals and experiments”, Space Research Institute (IKI), Moscow, Russia
9-13 February 2009
SP  - 1
EP  - 24
ER  - 
TY  - JOUR
A1  - Heinzel, Alexander
A1  - Schäfer, Ralf
A1  - Müller, Hans-Wilhelm
A1  - Schieffer, Andre
A1  - Ingenhag, Ariane
A1  - Eickhoff, Simon B.
A1  - Northoff, Georg
A1  - Franz, Matthias
A1  - Hautzel, Hubertus
T1  - Increased Activation of the Supragenual Anterior Cingulate Cortex during Visual Emotional Processing in Male Subjects with High Degrees of Alexithymia: An Event-Related fMRI Study
JF  - Psychotherapy and Psychosomatics
N2  - Background: One of the most prominent neurobiological models of alexithymia assumes an altered function of the anterior cingulate cortex (ACC) as the crucial neural correlate of alexithymia. So far functional imaging studies have yielded inconclusive results. Therefore, we tested this hypothesis in healthy alexithymics and nonalexithymics in an event-related fMRI study.
Methods: Thirty high- and 30 low-alexithymic right-handed male subjects (selected by the 20-item Toronto Alexithymia Scale, TAS-20) were investigated with event-related fMRI using a picture viewing paradigm. The stimuli consisted of happy, fearful and neutral facial expressions (Ekman-Friesen) as well as positive, negative and neutral pictures from the International Affective Picture System.
Results: Contrasting the high-alexithymic with the low-alexithymic group we observed increased activation of the supragenual ACC for different emotional valences as well as for different emotional stimuli. Moreover, there was a positive correlation of the ACC with the individual TAS-20 scores but no correlations with the individual Beck Depression Inventory scores. Additionally, there was no difference in activity of the amygdala. 
Conclusions: We demonstrated that the supragenual ACC is constantly activated more strongly in alexithymic subjects and that this activation is related to the symptoms of alexithymia and not to associated symptoms such as depression. Therefore, our findings support the hypothesis of an altered function of the ACC in alexithymia.
Y1  - 2010
U6  - https://doi.org/10.1159/000320121
SN  - 0033-3190
VL  - 79
IS  - 6
SP  - 363
EP  - 370
PB  - Karger
CY  - Basel
ER  - 
TY  - JOUR
A1  - Heinzel, Alexander
A1  - Schäfer, Ralf
A1  - Müller, Hans-Wilhelm
A1  - Schieffer, Andre
A1  - Ingenhag, Ariane
A1  - Northoff, Georg
A1  - Franz, Matthias
A1  - Hautzel, Hubertus
T1  - Differential modulation of valence and arousal in high-alexithymic and low-alexithymic individuals
JF  - Neuroreport
N2  - High-alexithymic individuals are characterized by an impaired ability to identify and communicate emotions whereas low-alexithymic individuals have a wide-ranging ability to deal with emotions. This study examined the hypothesis that valence and arousal modifications of emotional stimuli differentially modulate cortical regions in high-alexithymic and low-alexithymic individuals. To this end, 28 high-alexithymic and 25 low-alexithymic individuals were investigated with event-related fMRI using visual emotional stimuli. We found differential neural activations in the dorsal anterior cingulate, the insula and the amygdala. We suggest that these differences may account for the impaired ability of high-alexithymic individuals to appropriately handle emotional stimuli.
Y1  - 2010
U6  - https://doi.org/10.1097/WNR.0b013e32833f38e0
SN  - 1473-558X
VL  - 21
IS  - 15
SP  - 998
EP  - 1002
PB  - Lippincott Williams & Wilkins
CY  - London
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Probst, M.
A1  - Mai, A.
A1  - Tran, L.
A1  - Vonderstein, K.
A1  - Keschenau, P.
A1  - Linde, T.
A1  - Steinseifer, U.
A1  - Behr, M.
A1  - Mottaghy, K.
T1  - The influence of high shear on thrombosis and hemolysis in artificial organs
JF  - Artificial Organs
Y1  - 2010
SN  - 0391-3988
N1  - Special Issue: SI ; Meeting abstract
VL  - 33
IS  - 7
SP  - 426
EP  - 426
ER  - 
TY  - JOUR
A1  - Jansen, Sebastian
A1  - Behbahani, Mehdi
A1  - Laumen, Marco
A1  - Kaufmann, Tim
A1  - Hormes, Marcus
A1  - Schmitz-Rode, Thomas
A1  - Behr, Marek
A1  - Steinseifer, Ulrich
T1  - 3D Stereo-PIV Validation for CFD-Simulation of Steady Flow through the Human Aorta using Rapid-Prototyping techniques
Y1  - 2010
N1  - abstract ; IV International Symposium on Modelling of Physiological Flows, Sardinia, Italy, June 02-05, 2010 ; MPF2010
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Nam, J.
A1  - Waluga, C.
A1  - Behr, M.
A1  - Pasquali, M.
A1  - Mottaghy, K.
T1  - Modeling and Numerical Analysis of Platelet Activation, Adhesion and Aggregation in Artificial Organs
Y1  - 2010
U6  - https://doi.org/10.1097/01.mat.0000369377.65122.a3
N1  - Posterpresentation American Society of Artificial Organs (ASAIO), Baltimore, USA, May 27-29, 2010
ER  - 
TY  - JOUR
A1  - Jansen, S. V.
A1  - Behbahani, Mehdi
A1  - Laumen, M.
A1  - Kaufmann, T.
A1  - Hormes, M.
A1  - Behr, M.
A1  - Schmitz-Rode, T.
A1  - Steinseifer, U.
T1  - Investigation of Steady Flow Through a Realistic Model of the Thoracic Human Aorta Using 3D Stereo PIV and CFD-Simulation
Y1  - 2010
N1  - Posterpresentation ; American Society of Artificial Organs (ASAIO), Baltimore, USA, May 27-29, 2010
ER  -