Gap junctions are intercellular channels that connect the cytoplasms of adjacent cells. For gap junctions to properly control organ formation and electrical synchronization in the heart and the brain, connexin-based hemichannels must be correctly targeted to cell-cell borders. While it is generally accepted that gap junctions form via lateral diffusion of hemichannels following microtubule-medi...

Carbon nanotubes, which consist of only carbon atoms, were first discovered by Iijima [1] and can be thought of as a single layer of graphite that is wrapped into a cylinder. The cylindrical nanotubes are very stable and are regarded as the strongest fibers ever; nanotubes are extremely rigid to distortions along the tube axis whereas they are very flexible to those perpendicular to the axis [2...

How vertebrate epithelial cells divide in vivo and how the cellular environment influences cell division is currently poorly understood. A sine qua non condition to study cell division in situ is the ease of observation of cell division. This is fulfilled in the Xenopus embryo at the gastrula stage where polarized epithelial cells divide with a high frequency at the surface of the organism. Rec...

Submitted for the MAR11 Meeting of The American Physical Society Tunneling into clean Heavy Fermion Compounds: Origin of the Fano Lineshape1 PETER WOLFLE, Institute for Theory of Condensed Matter and Center for Functional Nanostructures, Karlsruhe Institute of Technology, D76128 Karlsruhe, Germany, YONATAN DUBI, ALEXANDER BALATSKY, Los Alamos National Lab — Recently observed tunneling spectra o...

During volume-modulated arc therapies (VMAT), dosimetric errors are introduced by multiple open dynamic leaf gaps that are present in fixed diaphragm linear accelerators. The purpose of this work was to develop a methodology for adjusting the rounded leaf end modeling parameters to improve out-of-field dose agreement in SmartArc VMAT treatment plans delivered by fixed jaw linacs where leaf gap ...

In this paper, we present a controller design for servoing the position of a parallel-plate electrostatic microactuator beyond its open-loop instability point. Controller design considers nonlinearities from both the parallel-plate actuator and the parallel-plate position sensor, to ensure robust stability within the feedback loop. Desired transient response is achieved by a pre-filter added in...