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Platforms comprising artificially patterned materials exploit the synergy between material photonic responses and structural form to enable transformative light-matter interactions which continually p...
Wriggling Microtubules Help Explain Coupling of “Active” Defects and Curvature（图）
Wriggling Microtubules Explain Coupling Active Defects Curvature
2017/10/26
Imagine a tiny donut-shaped droplet, covered with wriggling worms. The worms are packed so tightly together that they must locally line up with respect to each other. In this situation, we would say t...
Researchers simulate behavior of ‘active matter’
Researchers simulate behavior active matter
2015/6/18
From flocks of starlings to schools of fish, nature is full of intricate dynamics that emerge from the collective behavior of individuals. In recent years, interest has grown in trying to capture simi...
Coupling a thermodynamically active ice shelf to a regional simulation of the Weddell Sea
thermodynamically active ice shelf regional simulation
2014/12/12
A thermodynamically interactive ice shelf cavity
parameterization is coupled to the Regional Ocean Model
System (ROMS) and is applied to the Southern Ocean domain with enhanced resolution in the Wed...
Quantum mechanical calculations reveal the hidden states of enzyme active sites（图）
enzyme active sites Quantum mechanical
2014/12/1
Enzymes carry out fundamental biological processes such as photosynthesis, nitrogen fixation and respiration, with the help of clusters of metal atoms as “active” sites. But scientists lack basic info...
Researchers at MIT and in Saudi Arabia have developed a new way of making surfaces that can actively control how fluids or particles move across them. The work might enable new kinds of biomedical or ...
Active Negative Index Metamaterial Powered by an Electron Beam
Active Negative Index Metamaterial Electron Beam Optics
2012/5/17
A novel active negative index metamaterial that derives its gain from an electron beam is intro- duced. The metamaterial consists of a stack of equidistant parallel metal plates perforated by a period...
Impurity-assisted Andreev reflection at a spin-active half-metal-superconductor interface
Impurity-assisted Andreev reflection spin-active half-metal-superconductor interface
2012/2/27
The Andreev reflection amplitude at a clean interface between a half-metallic ferromagnet (H) and a superconductor (S) for which the half metal's magnetization has a gradient perpendicular to the inte...
Self-injection-locked magnetron as an active ring resonator side coupled to a waveguide with a delayed feedback loop
delayed feedback loop Self-injection-locked
2011/8/26
The theoretical analysis and numerical simulations of the magnetron operation with a feedback loop were performed assuming that the delay of the electromagnetic wave propagating in the loop is constan...
Bayesian experimental design for the active nitridation of graphite by atomic nitrogen
Bayesian experimental design the active nitridation atomic nitrogen
2011/8/3
Abstract: The problem of optimal data collection to efficiently learn the model parameters of a graphite nitridation experiment is studied in the context of Bayesian analysis using both synthetic and ...
An FET-Based Unit Cell for an Active Magnetic Metamaterial
Terms—Artificial materials, FET circuits, Negative resistance devices, Polarizability, Oscillators
2011/9/14
A particle that can be used to create an active magnetic metamaterial has been designed using an FET transistor loaded in its gate by a conducting ring and in its source by a parallel resonance circui...
IR Bismuth active centers in optical fibers: Combined excitation-emission spectroscopy
IR Bismuth active centers excitation-emission spectroscopy
2011/9/2
Впервые получены 3-мерные спектры люминесценции (интенсивность люминесценции в зависимости от длин волн возбуждения и эмиссии) легированных висмутом волоконных световодов различного состава в широком ...
Comment on "Particle acceleration by stimulated emission of radiation near a solid-state active medium"
Particle acceleration stimulated emission of radiation
2011/8/31
In a recent Letter,V. Berezovsky, H. Alam, and L. Sch鋍hter have reported 揳cceleration of electrons moving in free space near an active Nd:YAG slab? The reported mechanism is particle acceleration by s...
Transitions in active rotator systems: invariant hyperbolic manifold approach
active rotator systems Normally hyperbolic manifolds Pulsating waves Neuronal models
2011/7/25
Abstract: Our main focus is on a general class of active rotators with mean field interactions, that is globally coupled large families of dynamical systems on the unit circle with non-trivial stochas...
Pulling and Pushing a Cargo With a Catalytically Active Carrier
Pulling and Pushing Cargo Catalytically Active Carrier
2011/9/9
Catalytically active particles suspended in a liquid can move due to self-phoresis by generating solute gradients via chemical reactions of the solvent occurring at parts of their surface. Such partic...