Erik Weitenberg

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Factors defining the previously established differences in susceptibility of endothelial cells to the tumor-necrotizing agents, tumor necrosis factor (TNF) and lipid A, were investigated. Venous and arterial endothelial cells isolated from bovine and human umbilical cords showed large differences in proliferation rate and susceptibility to TNF and lipid A(More)
Effects of recombinant tumour necrosis factor (TNF) on functional and structural vascular volumes in solid murine Meth A tumours were investigated by injection of Hoechst 33342 and staining for the vascular basement membrane component laminin, respectively. Systemic injection of 3 x 10(4) U TNF caused an initial increase in functional volume in the tumour,(More)
Using the U-Prove system originally conceived by Stefan Brands [2000], one can obtain credentials from a central authority, and partially or completely disclose them to relying parties. The user's privacy is guaranteed as long as he does not show any credential more than once. However, this requirement forces a privacy-conscious user to request and store(More)
—We investigate the robustness of existing control strategies for economically optimal frequency regulation in power grids in the presence of disruptions to the controllers' communication network. Using a strict Lyapunov function, we are able to derive exponential bounds on the convergence rate in terms of the proportion of time during which the disruption(More)
A novel power consensus algorithm for DC microgrids is proposed and analyzed. DC microgrids are networks composed of DC sources, loads, and interconnecting lines. They are represented by differential-algebraic equations connected over an undirected weighted graph that models the electrical circuit. A second graph represents the communication network over(More)
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