Results 111 to 120 of about 17,713 (284)

A Bistable Model of Cell Polarity

PLoS ONE, 2012
Ultrasensitivity, as described by Goldbeter and Koshland, has been considered for a long time as a way to realize bistable switches in biological systems. It is not as well recognized that when ultrasensitivity and reinforcing feedback loops are present in a spatially distributed system such as the cell plasmamembrane, they may induce bistability and ...
Semplice M., Veglio A., Naldi G., Serini G., GAMBA, ANDREA ANTONIO   +4 more
openaire   +4 more sources

Oscillator models for multiphoton optical bistability and phase conjugacy

, 1984
Nonlinear oscillator models are constructed to treat the bistability in situations involving elementary excitations in solids. Such models are shown to be useful not only in describing single photon but also multiphoton bistability.
Agarwal, G. S.
core   +1 more source

Overcrowded Alkene Photo‐Redox‐Switches Based on Quinolinium/Carbene Building Blocks

Angewandte Chemie International Edition, EarlyView.
A modular synthesis of a new class of photo‐ and redox‐switches is described based on the combination of quinolinium salts and carbenes. Photochemical switching allows to selectively switch between folded E/Z isomers, while electrochemical switching allows to change between neutral, radical cation and dicationic oxidation states, which are all isolable
Chris Burdenski, Patrick W. Antoni, Marcel E. Baumert, Leonie Ziemann, Samaresh C. Sau, Julian J. Holstein, Maria Castro, Nitin Kumar, Ofer Filiba, Igor Schapiro, Max M. Hansmann   +10 more
wiley   +1 more source

Optical bistability based on hyperbolic metamaterials

, 2018
We numerically demonstrate optical bistability in a nonlinear multilayer structure by utilizing the unique dispersion of hyperbolic metamaterials. The linear transmission is varied sharply with topological transition of isofrequency contour of the ...
Sangin Kim, Kim, Sangin, Kim, Soeun, Myunghwan Kim, Soeun Kim, Kim, Myunghwan   +5 more
core   +1 more source

Impedance Spectroscopy of Bifurcation Oscillations in S‐Type Self‐Oscillatory Devices

Advanced Physics Research, EarlyView.
Impedance spectroscopy (IS) reveals stability regimes and bifurcation dynamics in S‐type self‐oscillatory devices. By linking nonlinear control theory with frequency‐domain measurements, experimental signatures of oscillations, entrainment, and phase locking are directly identified.
Gonzalo Rivera‐Sierra, Roberto Fenollosa, Jenifer Rubio‐Magnieto, Nripan Mathews, Si En Ng, Juan Bisquert   +5 more
wiley   +1 more source

Optical bistability in II-VI compounds

, 1990
This paper reviews the different types of optical bistability in II-VI semiconductor compounds with particular emphasis on experimental results obtained in CdHgTe, CdTe and ZnSe. Results of optical bistability in an entirely molecular beam deposited ZnSe
Muirhead, I. T., Staromlynska, J., Lewis, K. L., Miller, A., Craig, D., Steward, G.   +5 more
core   +1 more source

Optical bistability in a low-photon-density regime [PDF]

, 2018
We give a microscopic description of the optical bistability, where the transmission coefficient has two different values as a function of input light intensity, and the system exhibits a discontinuous jump with a hysteresis loop.
Todo, Synge, Miyashita, Seiji, de Raedt, Hans, Shirai, Tatsuhiko   +3 more
core   +1 more source

Guiding and Manipulating Light Fields in Microstructured Liquid Crystals

Advanced Physics Research, EarlyView.
This review summarizes recent advances in guided‐wave optics enabled by microstructured liquid crystal (LC) devices, covering their fundamental material properties, key degree of freedom for dynamic light field manipulations. The advances of linear guided‐wave optics, nonlinear‐optics with spatial optical solitons, and microlasers in LC‐based devices ...
Shan‐shan Chang, Yong‐shuai Li, Jin‐hui Chen   +2 more
wiley   +1 more source

On the control of bistability in non-contact mode AFM using modulated time delay

MATEC Web of Conferences, 2014
We study the control of bistability in non-contact mode AFM using time delay with modulated feedback gain. We consider that the tip-sample interaction force is described by Lennard-Jones potential and the equation of motion is modeled by single degree of
Kirrou I., Belhaq M.
doaj   +1 more source

MicroReview Bistability in bacteria

, 2020
Summary Gene expression in bacteria is traditionally studied from the average behaviour of cells in a population, which has led to the assumption that under a particular set of conditions all cells express genes in an approximately uniform manner.
David Dubnau, Richard Losick
core