Results 21 to 30 of about 247 (167)
A Primer on Underwater Quantum Key Distribution
Quantum Engineering, Volume 2023, Issue 1, 2023., 2023 The growing importance of underwater networks (UNs) in mission‐critical activities at sea enforces the need for secure underwater communications (UCs). Classical encryption techniques can be used to achieve secure data exchange in UNs. However, the advent of quantum computing will pose threats to classical cryptography, thus challenging UCs. Currently,
Pietro Paglierani +6 more
wiley +1 more source
Harmonic generation with multi‐layer dielectric metasurfaces
Nanophotonics, Volume 10, Issue 7, Page 1837-1843, May 2021., 2021 Abstract Metasurfaces have recently gained extensive interest because of their extraordinary optical behavior as artificial material interfaces with ultrahigh compactness. In this framework, dielectric platforms have newly become very promising for nonlinear nanophotonics, providing opportunities, especially for ultrafast optical switching, and high ...
Giuseppe Marino +9 more
wiley +1 more source
Insect Conservation and Diversity, Volume 14, Issue 2, Page 260-270, March 2021., 2021 The garden tiger moth (Arctia caja) is a species particularly affected by light pollution. Photo credit: Marian Schut We provide an overview of existing studies that have assessed long‐term effects of artificial light at night (ALAN) on insect populations and communities Almost no study to date has combined repeated, multiple samplings per year over ...
Gregor Kalinkat +5 more
wiley +1 more source
Frontiers in Astronomy and Space Sciences, 2022 Modern understanding of dust astrophysics reveals that radiative torques (RATs) arising from the radiation–dust interaction can induce two fundamental effects: grain alignment and rotational disruption.
Le Ngoc Tram, Thiem Hoang, Thiem Hoang
doaj +1 more source
Three-dimensional magnetic fields of molecular clouds
Frontiers in Astronomy and Space Sciences, 2022 To investigate the role of magnetic fields in the evolution of the interstellar medium, formation and evolution of molecular clouds, and ultimately the formation of stars, their three-dimensional (3D) magnetic fields must be probed.
Mehrnoosh Tahani, Mehrnoosh Tahani
doaj +1 more source
Linear polarization signatures of atmospheric dust with the SolPol direct-sun polarimeter [PDF]
Atmospheric Measurement Techniques, 2023 Dust particles in lofted atmospheric layers may present a preferential orientation, which could be detected from the resulting dichroic extinction of the transmitted sunlight.
V. Daskalopoulou +13 more
doaj +1 more source
The Differential Polarization of Starlight as a Function of Distance [PDF]
Symposium - International Astronomical Union, 1973 We have plotted the differential polarization as a function of distance and galactic longitude for 1732 stars between galactic latitudes −5° and +5°. The data were obtained from several published sources. A fairly clearcut distinction is seen between the effects of spiral arms and inter-arm regions indicating that starlight is systematically polarized ...
Stephen Lloyd, Martin O. Harwit
openaire +1 more source
The Astronomical Journal, 2023 Optical starlight can be partially polarized while propagating through the dusty, magnetized interstellar medium (ISM). The polarization efficiency describes the polarization intensity fraction per reddening unit, P _V / E ( B − V ), related to the ...
Y. Angarita +6 more
doaj +1 more source
Time-resolved Optical Polarization Monitoring of the Most Variable Brown Dwarf
The Astronomical Journal, 2023 Recent atmospheric models for brown dwarfs suggest that the existence of clouds in substellar objects is not needed to reproduce their spectra, nor their rotationally induced photometric variability, believed to be due to the heterogeneous cloud coverage
Elena Manjavacas +5 more
doaj +1 more source
The Simons Observatory: Galactic Science Goals and Forecasts
The Astrophysical Journal, 2022 Observing in six frequency bands from 27 to 280 GHz over a large sky area, the Simons Observatory (SO) is poised to address many questions in Galactic astrophysics in addition to its principal cosmological goals.
Brandon S. Hensley +33 more
doaj +1 more source