The distributed Maxwell-slip model provides a convenient way to describe the presliding friction behavior. The modified single-state Maxwell-slip (MMS) model is proposed with the main benefit to require two concentrated parameters only when describing the smooth hysteresis of the presliding friction. The model is rate-independent at both, saturated and unsaturated hysteresis, and is consistent ...

Operation of PEM fuel cells (PEMFC) with the dead-ended anode (DEA) leads to severe voltage transients due to accumulation of nitrogen, water vapor and liquid water in the anode channels and the gas diffusion layer (GDL). Accumulation of nitrogen causes a large voltage transient with a characteristic profile whereas the amount of water vapor in the anode is limited by the saturation pressure, a...

We convert the self-dual model of Townsend, Pilch, and Nieuwenhuizen to a first-class system using the generalized canonical formalism of Batalin, Fradkin, and Tyutin and show that gauge-invariant fields in the embedded model can be identified with observables in the Maxwell-Chern-Simons theory as well as with the fundamental fields of the self-dual model. We construct the phase-space partition...

Department for Geoand Environmental Sciences, GeobioCenter and Center for Nanoscience, Ludwig-Maximilians-Universität, Theresienstrasse 41, 80333 München, Germany *E-mail: [email protected] URL: www.nanobiomed.de Over the last 15 years, the use of atomic force microscopy (AFM) has spread from the materials science of hard matter to the fields of biology and biomolecular research....

The best stage in a scientist s career is ... when they can still do chemistry in the lab with their own hands. The biggest problem that scientists face is ...—sadly enough—to focus on science. The best advice I have ever been given is ... not to get frustrated over problems but to come up with respective solutions (J. M. J. Fr chet). A good work day begins with ... breakfast with the family, r...

In this paper we study an initial{boundary value Stefan{type problem with phase relaxation where the heat ux is proportional to the gradient of the inverse absolute temperature. This problem arises naturally as limiting case of the Penrose{Fife model for diiusive phase transitions with non{conserved order parameter if the coeecient of the interfacial energy is taken as zero. It is shown that th...

This paper presents a statistical approach to aggregating speed and phase (directional) information for vascular segmentation in phase contrast magnetic resonance angiograms (PC-MRA), and proposes a Maxwell-Gaussian finite mixture distribution to model the background noise distribution. In this paper, we extend our previous work [6] to the segmentation of phase-difference PC-MRA speed images. W...

The Mechanization of the Mind: On the Origins of of modelling and scientific explanation, the physics Cognitive Science, Jean-Pierre Dupuy, translated by of dissipative processes, aspects of neurophysiology M.B. DeBevoise, Princeton University Press, 2000, and embryology, and more, all without once trivializ$29.95 / £19.95, 240 pp. ISBN: 0-691-02574-6 ing his subject or falling victim to the us...

In the following, I will outline some implications of the Cologne program of “interactive constructivism” (founded by Kersten Reich) 1 for educational theory. I will proceed in three steps. In an introductory section, I will first briefly locate the Cologne program within the context of the so called „cultural turn“ in recent constructivist discourses. Secondly, I will introduce some main theor...