Results 91 to 100 of about 117,776 (291)

Light, Gravity and Matter (with emphasis on thermo-gravity waves) [PDF]

open access: yesINCAS Bulletin
What are light, gravity, and regenerating matter? Where do they originate and where do they go? The answers to these questions lie in one of the most powerful equations ever discovered: Euler's formula (i.e., complex analysis).
Horia DUMITRESCU   +2 more
doaj   +1 more source

Pathways to Discovery in Astronomy and Astrophysics for the 2020s

open access: yes, 2023
Fiona Harrison   +145 more
semanticscholar   +1 more source

Tuning Ultra‐Narrow Direct Bandgap in α‐Sn Nanocrystals: A CMOS‐Compatible Approach for THz Applications

open access: yesSmall, EarlyView.
α‐Sn NPs of different sizes are stabilized on Si wafer by means of a CMOS‐compatible process employing microwave irradiation. Unprecedented tunability of the ultranarrow bandgap energy of α‐Sn between 64 and 137 meV (15–35 THz) due to quantum confinement is demonstrated.
Tiziano Bertoli   +19 more
wiley   +1 more source

Calculating the ionization rate induced by GCR and SCR protons in Earth’s atmosphere

open access: yesSolar-Terrestrial Physics, 2019
This paper explores the applied use of the RUSCOSMICS software package [http://ruscosmics.ru] designed to simulate propagation of primary cosmic ray (CR) particles through Earth’s atmosphere and collect information about characteristics of their ...
Maurchev E.A.   +4 more
doaj   +1 more source

Anomalous‐Energy Runaway Electrons Originating in Fast Ionisation Wave During Pulsed Gas Breakdown

open access: yesHigh Voltage, EarlyView.
ABSTRACT Anomalous‐energy runaway electrons (RAEs), whose energy exceeds the maximum potential difference across the discharge gap, are widely observed in various plasma phenomena. This study investigates the origination of anomalous‐energy RAEs in fast ionisation waves (FIWs) formed during pulsed gas breakdown.
Bangdou Huang   +4 more
wiley   +1 more source

Alternative Approaches for Estimating Highest‐Density Regions

open access: yesInternational Statistical Review, EarlyView.
Summary Among the variety of statistical intervals, highest‐density regions (HDRs) stand out for their ability to effectively summarise a distribution or sample, unveiling its distinctive and salient features. An HDR represents the minimum size set that satisfies a certain probability coverage, and current methods for their computation require ...
Nina Deliu, Brunero Liseo
wiley   +1 more source

Breakthrough Multi-Messenger Astrophysics with the THESEUS Space Mission [PDF]

open access: gold, 2022
G. Stratta   +8 more
openalex   +1 more source

Robust Distance Covariance

open access: yesInternational Statistical Review, EarlyView.
Summary Distance covariance is a popular measure of dependence between random variables. It has some robustness properties, but not all. We prove that the influence function of the usual distance covariance is bounded, but that its breakdown value is zero.
Sarah Leyder   +2 more
wiley   +1 more source

The nature and formation of silica minerals in eucrite meteorites: Insight into the protoplanetary magma crystallization

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Silica polymorphs in meteorites provide critical constraints on crystallization processes associated with thermal activity in the early solar system. A detailed investigation of silica polymorphs in eucrites (the largest group of achondrites) using cathodoluminescence imaging and laser‐Raman spectroscopy revealed significant variations in the ...
Rei Kanemaru   +14 more
wiley   +1 more source

Differential geometry of collective models

open access: yesAIMS Mathematics, 2019
The classical astrophysical theory of Riemann ellipsoids and the quantum nuclear theory of Bohr and Mottelson share a common mathematical foundation in terms of the differential geometry of a principal bundle ${\cal P}$ and its associated vector bundle E,
George Rosensteel
doaj   +1 more source

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