Results 51 to 60 of about 49,516 (251)
Active auroral arc powered by accelerated electrons from very high altitudes
Scientific Reports, 2021 Bright, discrete, thin auroral arcs are a typical form of auroras in nightside polar regions. Their light is produced by magnetospheric electrons, accelerated downward to obtain energies of several kilo electron volts by a quasi-static electric field ...
Shun Imajo +20 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé +5 more
wiley +1 more source
Coal industry in the context of Ukraine economic security [PDF]
, 2017 Purpose. To rate the main factors and indicators of the national economic security, in particular the degree of the country’s provision with primary natural resources which determine the global energy consumption trends. Methods.
Horbatova, V +3 more
core +2 more sources
Advanced Engineering Materials, EarlyView.The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan +4 more
wiley +1 more source
Field-effect transistor based on surface negative refraction in Weyl nanowire
APL Materials, 2020 Weyl semimetals are characterized by their bulk Weyl points—conical band touching points that carry a topological monopole charge—and Fermi arc states that span between the Weyl points on the surface of the material.
Guangze Chen, Wei Chen, Oded Zilberberg
doaj +1 more source
Higher-order topolectrical semimetal realized via synthetic gauge fields
APL Photonics, 2021 Classical bosonic systems may be tailored to support topological order and unidirectional edge transport exploiting gauge fields. Here, we theoretically explore how synthetic gauge fields may be used to induce higher-order topological phases and zero ...
Xiang Ni, Andrea Alù
doaj +1 more source
Theory of Parabolic Arcs in Interstellar Scintillation Spectra
, 2004 Our theory relates the secondary spectrum, the 2D power spectrum of the radio dynamic spectrum, to the scattered pulsar image in a thin scattering screen geometry.
Barney J. Rickett +12 more
core +1 more source
Sparkle: Hover Feedback with Touchable Electric Arcs [PDF]
, 2017 Many finger sensing input devices now support proximity input, enabling users to perform in-air gestures. While near-surface interactions increase the input vocabulary, they lack tactile feedback, making it hard for users to perform gestures or to know ...
Sahoo, Deepak Ranjan +2 more
core +1 more source
Advanced Engineering Materials, EarlyView.This study investigates the tribological response of 60NiTi alloy under dry, water‐lubricated and high‐temperature conditions. The alloy exhibits decreasing wear volume and friction with increasing temperature due to the formation of protective oxide layers. The work clarifies dominant wear mechanisms and demonstrates the suitability of 60NiTi for high‐
Anthony Onyebuchi Okoani +2 more
wiley +1 more source
, 2010 We are developing a model of vacuum arcs. This model assumes that arcs develop as a result of mechanical failure of the surface due to Coulomb explosions, followed by ionization of fragments by field emission and the development of a small, dense plasma ...
Huang, D. +5 more
core +1 more source