Günter Heinz

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BACKGROUND The role of hypothermic circulatory arrest (HCA) in cardiovascular surgery is controversial and assumed to result in neurocognitive dysfunction that is not always detected by standard clinical observation. We assessed cognitive P300 visual evoked potentials (P300) in patients undergoing either HCA or coronary artery bypass grafting (CABG) to(More)
In response to the trend of increasing component complexity and the need for more cost-effective processes, one common approach is to eliminate N2 protection during Pb-free soldering. These harsh soldering conditions will pose challenges for all surface finishes, not only for copper diffusion rates but also for oxidation of the solder pastes and surface(More)
Unter den durch Krebs verursachten Todesfällen beim Mann liegt das Prostatakarzinom an zweiter Stelle. Aufgrund der Häufigkeit dieses Karzinoms ist eine standardisierte Diagnostik unter Ausnutzung aller zur Verfügung stehenden diagnostischen Methoden essenziell. Da die morphologische Magnetresonanztomographie (MRT) gewisse Limitationen bzgl. Detektion,(More)
The ‘concept of cutting vectors’, developed by the author, is used to investigate the weight of the faces of arrangements of lines. Explicit formulas are given in the case of semi-rich acyclic arrangements. Special mappings are de ned which allow to ‘move’ in the set of cutting vectors. Using this possibility we obtain lower and upper bounds for the total(More)
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