Abstract Die Zellstoff‐ und Papierindustrie ist einer der wichtigsten Industriesektoren weltweit hat großes Potenzial, ein Eckpfeiler für die zukünftige Bioökonomie zu sein, insbesondere Lignocellulose‐Bioraffinerien. Das Potenzial von Membranverfahren bei dieser Umwandlung wird in drei Beispielen aus dem Bereich Kraft/Sulfat, Sulfit thermomechanischem Aufschluss dargestellt. Darüber hinaus wer...

We describe D = 4 twistorial membrane in terms of two twistorial three–dimensional world volume fields. We start with the D–dimensional p–brane generalizations of two phase space string formulations: due to Siegel, with two vectorial fourmomenta, and the formulation with tensorial momenta. Further we consider tensionful membrane case in D = 4. By using the membrane generalization of Cartan–Penr...

An increasing number of collaborative learning environments is based on shared workspace systems using two-dimensional graph-structured visual representations such as argumentation networks and concept maps. We propose an integrated framework that allows for flexibly specifying a wide range of visual languages and plugging in components for operational semantics, adequate feedback and intellige...

The concept of the paucimolecular membrane derived in the first place from studies, such as those of Gorter and Grendel, on the azmourit of fatty material that could be extracted from the cell, based on the assumption that this was mainly concenitrated at its surface. These studies, and other ones, led to the concept of the bimolecular leaflet of lipid as the fundamental basis of membrane struc...

Sec1 proteins are critical players in membrane trafficking, yet their precise role remains unknown. We have examined the role of Sec1p in the regulation of post-Golgi secretion in Saccharomyces cerevisiae. Indirect immunofluorescence shows that endogenous Sec1p is found primarily at the bud neck in newly budded cells and in patches broadly distributed within the plasma membrane in unbudded cell...

We describe a novel framework for two-phase image segmentation, namely the Fuzzy Region Competition. The functional involved in several existing models related to the idea of Region Competition is extended by the introduction of a fuzzy membership function. The new problem is convex and the set of its global solutions turns out to be stable under thresholding, operation that also provides solut...

This paper presents a novel dosing concept for drug delivery based on a peristaltic piezo-electrically actuated micro membrane pump. The design of the silicon micropump itself is straight-forward, using two piezoelectrically actuated membrane valves as inlet and outlet, and a pump chamber with a piezoelectrically actuated pump membrane in-between. To achieve a precise dosing, this micropump is ...