Results 121 to 130 of about 4,448,337 (335)

Revisiting CN− Formation Mechanisms in Electron Collisions with Benzonitrile

open access: yesChemPhysChem, EarlyView.
This study explores negative ion formation via electron attachment, revealing CN− formation at 3.0 and 7–10 eV. Dissociation pathways are analyzed using G4(MP2) and CASPT2 calculations, highlighting the coupling between the π4* and σ* resonances critical for interstellar chemistry. Radiation‐induced processes in the aromatic cyano compound benzonitrile
Rodrigo Rodrigues   +8 more
wiley   +1 more source

Space Weather Effects on Heart Rate Variations: Sex Dependence

open access: yesAtmosphere
The effects of solar activity and the accompanying space weather events on human pathological conditions, physiological parameters and other psycho-physiological disturbances have been analyzed in numerous recent investigations.
Maria-Christina Papailiou   +1 more
doaj   +1 more source

Spontaneous Mirror‐Symmetry Breaking Destabilizes Racemates: A Route to Homochirality and Reversed Chemical Selectivity

open access: yesChemPhysChem, EarlyView.
Reaction networks yielding spontaneous mirror‐symmetry breaking (SMSB) are revisited. All include a first‐order enantioselective autocatalysis, which, on its own, is unable to lead to SMSB. The coupling with the so‐called ancillary reactions (racemization, mutual inhibition, etc.) makes the racemic state unstable.
Josep M. Ribó   +2 more
wiley   +1 more source

Heart Rate Variations During Two Historic Geomagnetic Storms: October and November 2003

open access: yesAtmosphere
The investigation of the two phenomena of Space Weather, i.e., Forbush decreases in the cosmic ray intensity and geomagnetic storms, is a highly developing field of modern scientific research, since these two phenomena can affect not only technological ...
Maria-Christina Papailiou   +1 more
doaj   +1 more source

Exploring the Effects of Reduced Gravitational Field Impacts on Convective Heat Transfer: A Comprehensive Review

open access: yesHeat Transfer, EarlyView.
ABSTRACT This review explores the impact of gravitational instability on convective heat transfer, integrating existing research results and theoretical models. Gravitational instability is vital in promoting or hindering convective actions in different systems, such as atmospheric events, ocean currents, and industrial processes.
Hossam A. Nabwey   +3 more
wiley   +1 more source

Towards Water, Food and Energy Security: The Global Challenges and Possible Solutions for a Holistic Vision of Sustainability

open access: yesIrrigation and Drainage, EarlyView.
ABSTRACT This invited paper gives an overview of the challenges the world is facing and offers a possible solution for water and food security within the holistic integrated concept of the water–energy–food (WEF) nexus. The paper summarizes the experience the author gained through working on various research projects at national and international ...
Ragab Ragab
wiley   +1 more source

Cosmic-ray Antimatter

open access: yes, 2017
In recent years, space-born experiments have delivered new measurements of high energy cosmic-ray (CR) $\bar p$ and $e^+$. In addition, unprecedented sensitivity to CR composite anti-nuclei anti-d and anti-He is expected to be achieved in the near future.
Blum, Kfir, Sato, Ryosuke, Waxman, Eli
core  

High Altitude characterization of the Hunga Pressure Wave with Cosmic Rays by the HAWC Observatory [PDF]

open access: green, 2022
R. Alfaro   +66 more
openalex   +1 more source

Low‐Frequency Raman Spectra of Natural Pyrrhotites: Polarization Dependence for Its Lattice Modes

open access: yesJournal of Raman Spectroscopy, EarlyView.
The present study found low‐wavenumber Raman modes of pyrrhotite Fe1‐xS at ~68, ~87, ~117, and ~230 cm−1 for the first time, thanks to a lab‐built Raman spectrometer, in which the optical path of the incident laser was purged by Ar gas. The sufficiently high signal‐to‐noise and signal‐to‐base ratios enabled us to obtain the polarization dependence of ...
Shu‐hei Urashima   +5 more
wiley   +1 more source

The TAIGA experiment: from cosmic ray to gamma-ray astronomy in the Tunka valley

open access: yes, 2016
The physical motivations and advantages of the new gamma-observatory TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) is presented.
N. Budnev   +78 more
semanticscholar   +1 more source

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