Results 51 to 60 of about 6,238 (217)

Stripe and bubble ratchets on asymmetric substrates

Physical Review Research
We show that various nonmonotonic ratchet effects can arise when mesophase pattern-forming systems, which exhibit anisotropic crystal, stripe, and bubble regimes, are coupled to one-dimensional asymmetric substrates under ac driving.
C. Reichhardt, C. J. O. Reichhardt
doaj   +1 more source

Spontaneous unidirectional rotation of a symmetric gear driven by spherical active particles

National Science Open
Time reversal asymmetry and spatial anisotropy are considered two prerequisites for Brownian ratchet. An intriguing realization can be achieved by placing an asymmetric gear in the suspension of motile rod-like bacteria.
Wang Chao, Lian Wenchao, Li Huishu, Tian Wende, Chen Kang   +4 more
doaj   +1 more source

New Effects and Methods in Brownian Transport

Stats
We consider the noise-induced transport of overdamped Brownian particles in a ratchet system driven by nonequilibrium symmetric three-level Markovian noise and additive white noise.
Dmitri Martila, Stefan Groote
doaj   +1 more source

Optical rectification by ratchet transport in an asymmetric grating

AIP Advances, 2021
We report on electron ratchet transport’s manifestation in the optical rectification (OR) of an asymmetric grating. The photon-drag enabled effect is magnified by asymmetric photon scatterings and the induced optical nonlinearity associated with the ...
P. Moroshkin, T. Ochiai, R. Osgood III, J. Xu   +3 more
doaj   +1 more source

An ontological morphological phylogenetic framework for living and extinct ray‐finned fishes (Actinopterygii)

The Anatomical Record, EarlyView.
Abstract The ray‐finned fishes include one out of every two species of living vertebrates on Earth and have an abundant fossil record stretching 380 million years into the past. The division of systematic knowledge of ray‐finned fishes between paleontologists working on extinct animals and neontologists studying extant species has obscured the ...
Jack Stack
wiley   +1 more source

Local Search and the Evolution of World Models

Topics in Cognitive Science, EarlyView., 2023
Abstract An open question regarding how people develop their models of the world is how new candidates are generated for consideration out of infinitely many possibilities. We discuss the role that evolutionary mechanisms play in this process. Specifically, we argue that when it comes to developing a global world model, innovation is necessarily ...
Neil R. Bramley, Bonan Zhao, Tadeg Quillien, Christopher G. Lucas   +3 more
wiley   +1 more source

Circular ratchet currents in two dimensional tellurene with an asymmetric grating

Communications Physics
Terahertz ratchet effect converts alternating electric fields into direct currents in low-dimensional systems with broken spatial symmetry and provide a route towards room-temperature terahertz optoelectronics.
M. D. Moldavskaya, L. E. Golub, Chang Niu, Peide D. Ye, S. D. Ganichev   +4 more
doaj   +1 more source

Bidirectional flow of two-dimensional dusty plasma under asymmetric periodic substrates driven by unbiased external excitations

Physical Review Research, 2023
Collective transport properties of a one-dimensional (1D) asymmetric periodic substrate modulated two-dimensional (2D) dusty plasma driven by an unbiased sinusoidal excitation force are investigated using Langevin dynamical simulations.
Wei Li, D. Huang, C. Reichhardt, C. J. O. Reichhardt, Yan Feng   +4 more
doaj   +1 more source

Reporting What Matters, or Reporting What Looks Good? Materiality and Balance in Post–Rana Plaza Apparel Sustainability Disclosure

Business Strategy and the Environment, EarlyView.
ABSTRACT Sustainability reports (SRs) are widely criticized for vague disclosures and selective emphasis on positive outcomes, yet systematic research on two core SR challenges remains limited: materiality (whether disclosed content is relevant) and balance (whether both achievements and challenges are reported).
Mahsa Mohammadrezaei, José Carlos Marques   +1 more
wiley   +1 more source

Diffusive transport along a structured surface: ratchet effect stability when changing the potential profile type

Хімія, фізика та технологія поверхні
The phenomenon of the ratchet effect provides the motion a large number of molecular machines, existing in nature and artificially created nanomechanisms, capable to initiate directed diffusion movement along periodic structures.
T. Ye. Korochkova, O. V. Mashira, T. Yu. Gromovoy, A. D. Terets   +3 more
doaj   +1 more source