Results 41 to 50 of about 41,666 (241)

Bistable Spin Currents from Quantum Dots Embedded in a Microcavity [PDF]

, 2006
We examine the spin current generated by quantum dots embedded in an optical microcavity. The dots are connected to leads, which allow electrons to tunnel into and out of the dot.
Djuric, Ivana, Search, Chris P.
core   +1 more source

Complex dynamics in biological systems arising from multiple limit cycle bifurcation

Journal of Biological Dynamics, 2016
In this paper, we study complex dynamical behaviour in biological systems due to multiple limit cycles bifurcation. We use simple epidemic and predator–prey models to show exact routes to new types of bistability, that is, bistability between equilibrium
P. Yu, W. Lin
doaj   +1 more source

AMPA receptor mediated synaptic excitation drives state-dependent bursting in Purkinje neurons of zebrafish larvae

eLife, 2015
Purkinje neurons are central to cerebellar function and show membrane bistability when recorded in vitro or in vivo under anesthesia. The existence of bistability in vivo in awake animals is disputed.
Mohini Sengupta, Vatsala Thirumalai
doaj   +1 more source

Coherent control of intersubband optical bistability in quantum wells [PDF]

, 2003
We present a study of the nonlinear intersubband (ISB) response of conduction electrons in a GaAs/AlGaAs quantum well to strong THz radiation, using a density-matrix approach combined with time-dependent density-functional theory. We demonstrate coherent
Ullrich, C. A., Wijewardane, H. O.
core   +3 more sources

Bistable behavior of the lac operon in E. coli when induced with a mixture of lactose and TMG

Frontiers in Physiology, 2010
In this work we investigate multistability in the lac operon of Escherichia coli when it is induced by a mixture of lactose and the non-metabolizable thiomethyl galactoside (TMG).
Orlando Díaz-Hernández, Orlando Díaz-Hernández, Moisés Santillán, Moisés Santillán   +3 more
doaj   +1 more source

Emergent Bistability : Effects of Additive and Multiplicative Noise

, 2012
Positive feedback and cooperativity in the regulation of gene expression are generally considered to be necessary for obtaining bistable expression states.
Banerjee, Subhasis, Bose, Indrani, Ghosh, Sayantari   +2 more
core   +1 more source

Rationalising the onset of bistability in polylactic acid (PLA) bilayer laminates using Fused Filament Fabrication (FFF)

Virtual and Physical Prototyping
Fused Filament Fabrication (FFF)-based 4D printing offers a versatile route for creating shape-morphing structures. However, programming advanced mechanical functionalities such as bistability into standard thermoplastics remains a significant challenge.
Hongyu Zhou, Jie Zhang, Shi En Lim, Eleonora Ferraris, Hortense Le Ferrand   +4 more
doaj   +1 more source

Exploring the mono-/bistability range of positively autoregulated signaling systems in the presence of competing transcription factor binding sites.

PLoS Computational Biology, 2022
Binding of transcription factor (TF) proteins to regulatory DNA sites is key to accurate control of gene expression in response to environmental stimuli.
Rong Gao, Samantha E Brokaw, Zeyue Li, Libby J Helfant, Ti Wu, Muhammad Malik, Ann M Stock   +6 more
doaj   +1 more source

Emission spectra and intrinsic optical bistability in a two-level medium

, 2010
Scattering of resonant radiation in a dense two-level medium is studied theoretically with account for local field effects and renormalization of the resonance frequency.
A. Kuditcher, A. Nick Vamivakas, C.M. Bowden, C.M. Bowden, D. V. Kuznetsov, D.R. Gamelin, D.V. Novitsky, E.B. Flagg, F. Ciccarello, F. Ciccarello, F.A. Hopf, J.M. Ward, K.D. Zhu, L. Li, L. Li, M. Fleischhauer, M. G. Gladush, M. Gladush, M. Gladush, M.A. Noginov, M.E. Crenshaw, M.G. Benedict, M.P. Hehlen, M.P. Hehlen, M.P. Hehlen, O. Astafiev, O. Guillot-Noël, O. Guillot-Noël, O. Guillot-Noël, P. de Vries, S. Ates, S.M. Redmond, S.R. Lüthi, Vl. K. Roerich, Y. Ben-Aryeh, Y. Ben-Aryeh, Y. Gu   +36 more
core   +1 more source

Zenithal bistability in a nematic liquid crystal device with a monostable surface condition [PDF]

, 2003
The ground-state director configurations in a grating-aligned, zenithally bistable nematic device are calculated in two dimensions using a Q tensor approach.
C. V. Brown, E. G. Edwards, Guyon E., L. A. Parry-Jones, S. J. Elston   +4 more
core   +1 more source