منابع مشابه
Backward waves move cells forward
dvancing cells periodically pull on their substrates to test the environment, say Grégory Giannone, Michael Sheetz (Columbia University, New York, NY), and colleagues. The actomyosin contractions both strengthen attachments to more solid substrates, and break off part of a signaling complex so that it can be carried into the cell. Once that retrograde signal reaches myosin, which is some distan...
متن کاملBackward and Forward Travelling Waves in Evolutionary Games
We consider a three strategy game in which a pure strategy is an evolutionarily stable strategy (ESS). The individuals are moving randomly (modelled by diffusion) in a (1-dimensional) spatial environment which is homogeneous. It is shown that, contrary to intuition, even if the ESS is spatially dominant against each of the other two strategies separately, there might be a travelling wave which ...
متن کاملForward and Backward Uncertainty Quantification in Optimization
This contribution gathers some of the ingredients presented during the Iranian Operational Research community gathering in Babolsar in 2019.It is a collection of several previous publications on how to set up an uncertainty quantification (UQ) cascade with ingredients of growing computational complexity for both forward and reverse uncertainty propagation.
متن کاملMoving Forward Moving Backward: Directional Sorting of Chemotactic Cells due to Size and Adhesion Differences
Differential movement of individual cells within tissues is an important yet poorly understood process in biological development. Here we present a computational study of cell sorting caused by a combination of cell adhesion and chemotaxis, where we assume that all cells respond equally to the chemotactic signal. To capture in our model mesoscopic properties of biological cells, such as their s...
متن کاملGeneralized Forward-Backward Splitting
This paper introduces the generalized forward-backward splitting algorithm for minimizing convex functions of the form F + ∑i=1Gi, where F has a Lipschitzcontinuous gradient and the Gi’s are simple in the sense that their Moreau proximity operators are easy to compute. While the forward-backward algorithm cannot deal with more than n = 1 non-smooth function, our method generalizes it to the cas...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature Materials
سال: 2007
ISSN: 1476-1122,1476-4660
DOI: 10.1038/nmat1926