Results 11 to 20 of about 96,700 (242)
Diagnostics of active and eruptive prominences through hydrogen and helium lines modelling [PDF]
, 2008 In this study we show how hydrogen and helium lines modelling can be used to make a diagnostic of active and eruptive prominences. One motivation for this work is to identify the physical conditions during prominence activation and eruption. Hydrogen and
Labrosse, N. +2 more
core +10 more sources
Analysis of a 115MW, 3 shaft, helium Brayton cycle [PDF]
, 2002 This research theme is originated from a development project that is going on in South Africa, for the design and construction of a closed cycle gas turbine plant using gas-cooled reactor as the heat source to generate 115 MW of electricity.
Pradeepkumar, K. N.
core +7 more sources
The ionization of helium by neutral helium atoms [PDF]
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1946 Abstract A method is described for investigating the ionization produced in helium by collisions between quasi-stationary atoms—that is, atoms possessing only therm al velocities—and a beam of neutral helium atoms with kinetic energy less than 100 eV.
F, HORTON, D M, MILLEST
openaire +2 more sources
Proceedings of the National Academy of Sciences, 1998 The ratio 3 He/ 4 He (R) plays a central role in models of mantle evolution that propose an undegassed lower mantle, rich in the primordial isotope 3 He.
openaire +3 more sources
Applied Sciences, 2020 Massive underground storage of hydrogen could be a way that excess energy is produced in the future, provided that the risks of leakage of this highly flammable gas are managed. The ROSTOCK-H research project plans to simulate a sudden hydrogen leak into
Stéphane Lafortune +5 more
doaj +1 more source
An In-Situ TEM Study of High Temperature Helium Irradiation of 4H-SiC [PDF]
SiC is an excellent candidate material for use in fusion and fission nuclear reactors. The work done in this thesis aims to understand the behaviour of SiC under He irradiation at high temperatures.
Shen, Qiang
core +3 more sources
The Cosmic Production of Helium [PDF]
Science, 2003 We estimate the cosmic production rate of helium relative to metals (Δ Y/ Δ Z ) using K dwarf stars in the Hipparcos catalog with accurate spectroscopic metallicities. The best fitting value is Δ Y/ Δ Z = 2.1 ± 0.4 at the 68% confidence level ...
Jimenez, Raul +3 more
openaire +4 more sources
Geochemistry, Geophysics, Geosystems, 2022 Water column physico‐chemical studies were conducted over the southern Central Indian Ridge between 24°44’S and 25°52’S to identify and chemically characterize seafloor hydrothermal activity.
L. Surya Prakash +9 more
doaj +1 more source
Neonatal Applications of Heliox: A Practical Review
Frontiers in Pediatrics, 2022 Heliox is a mixture of helium and oxygen that may be utilized as an alternative to air-oxygen during the ventilatory support in the neonate. Special physical properties of Heliox, particularly low density, allow for improved gas flow and diffusion. First
Tomasz Szczapa +2 more
doaj +1 more source
The Helium and Carbon Isotope Characteristics of the Andean Convergent Margin
Frontiers in Earth Science, 2022 Subduction zones represent the interface between Earth’s interior (crust and mantle) and exterior (atmosphere and oceans), where carbon and other volatile elements are actively cycled between Earth reservoirs by plate tectonics.
P. H. Barry +30 more
doaj +1 more source