Results 11 to 20 of about 286,676 (265)

Interaction-free, single-pixel quantum imaging with undetected photons

open access: yesnpj Quantum Information, 2023
A typical imaging scenario requires three basic ingredients: (1) a light source that emits light, which in turn interacts and scatters off the object of interest; (2) detection of the light being scattered from the object and (3) a detector with spatial ...
Yiquan Yang   +5 more
doaj   +1 more source

Motional consensus of self-propelled particles

open access: yesScientific Reports, 2023
The motional consensus of self-propelled particles is studied in both noise-free cases and cases with noise by the standard Vicsek model. In the absence of noise, we propose a simple method, using grid-based technique and defining the normalized variance
Jia-xin Qian, Jun Wang, Yan-qing Lu
doaj   +1 more source

Disordered metasurface enabled single-shot full-Stokes polarization imaging leveraging weak dichroism

open access: yesNature Communications, 2023
Polarization, one of the fundamental properties of light, is critical for certain imaging applications because it captures information from the scene that cannot directly be recorded by traditional intensity cameras.
Qingbin Fan   +12 more
doaj   +1 more source

Procedural function-based modelling of volumetric microstructures [PDF]

open access: yes, 2011
We propose a new approach to modelling heterogeneous objects containing internal volumetric structures with size of details orders of magnitude smaller than the overall size of the object.
Alexander Pasko   +29 more
core   +1 more source

Hierarchical self-assembly of di-, tri- and tetraphenylalanine peptides capped with two fluorenyl functionalities: from polymorphs to dendrites [PDF]

open access: yes, 2016
Homopeptides with 2, 3 and 4 phenylalanine (Phe) residues and capped with fluorenylmethoxycarbonyl and fluorenylmethyl esters at the N-terminus and C-terminus, respectively, have been synthesized to examine their self-assembly capabilities.
Alemán Llansó, Carlos   +9 more
core   +2 more sources

Low-energy gap emerging from confined nematic states in extremely underdoped cuprate superconductors

open access: yesnpj Quantum Materials, 2023
The pairing mechanism of high-temperature superconductivity in cuprates is regarded as one of the most challenging issues in condensed matter physics. The core issue concerns how the Cooper pairs are formed.
Huazhou Li   +5 more
doaj   +1 more source

High Key Rate Quantum Conference Key Agreement With Unconditional Security

open access: yesIEEE Access, 2021
Quantum cryptography is a major ingredient of the future quantum internet that promises various secure communication tasks. Quantum conference key agreement (CKA) is an important cryptographic primitive of quantum cryptography, which provides the ...
Xiao-Yu Cao   +5 more
doaj   +1 more source

Continuous twin screw rheo-extrusion of an AZ91D magnesium alloy [PDF]

open access: yes, 2012
© The Minerals, Metals & Materials Society and ASM International 2012The twin screw rheo-extrusion (TSRE) is designed to take advantage of the nondendritc microstructure and thixotropic characterization of semisolid-metal slurries and produce simple ...
A. Das   +34 more
core   +1 more source

Photonic microstructures as laser mirrors [PDF]

open access: yes, 1998
Deeply etched 1-D third-order Bragg reflectors have been used as mirrors for broad-area semiconductor lasers operating at 975-nm wavelength. From a threshold and efficiency analysis, we determine the mirror reflectivity to be approximately 95%.
De La Rue, Richard M.   +4 more
core   +1 more source

A Braitenberg Vehicle Based on Memristive Neuromorphic Circuits

open access: yesAdvanced Intelligent Systems, 2020
The Braitenberg vehicle as a simple conceptual model to characterize the response behaviors of animals or insects under a stimulus is widely used to develop autonomous vehicles able to adapt to the varying environments.
Cong Wang   +8 more
doaj   +1 more source

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