Results 11 to 20 of about 695,127 (377)
Coupling a single electron on superfluid helium to a superconducting resonator. [PDF]
Nature Communications, 2019 Electrons on helium form a unique two-dimensional system on the interface of liquid helium and vacuum. A small number of trapped electrons on helium exhibits strong interactions in the absence of disorder, and can be used as a qubit.
Koolstra, Gerwin +2 more
core +5 more sources
Review of Membranes for Helium Separation and Purification
Membranes, 2017 Membrane gas separation has potential for the recovery and purification of helium, because the majority of membranes have selectivity for helium. This review reports on the current state of the research and patent literature for membranes undertaking ...
Colin A. Scholes, Ujjal K. Ghosh
doaj +2 more sources
The principles of helium exploration
Petroleum Geoscience, 2022 Commercial helium systems have been found to date as a serendipitous by-product of petroleum exploration. There are nevertheless significant differences in the source and migration properties of helium compared with petroleum.
D. Danabalan +6 more
semanticscholar +1 more source
The PHLEK Survey: A New Determination of the Primordial Helium Abundance [PDF]
Astrophysical Journal, 2020 We present Keck NIRSPEC and Keck NIRES spectroscopy of sixteen metal-poor galaxies that have pre-existing optical observations. The near-infrared (NIR) spectroscopy specifically targets the He i λ10830 Å emission line, due to its sensitivity to the ...
Tiffany Hsyu +3 more
semanticscholar +1 more source
Models of helium enrichment in helium-rich gas reservoirs of petroliferous basins in China
Natural Gas Industry B, 2023 Owing to the characteristics of chemical inertness, low molecular weight, low boiling point, strong permeability and high heat conductivity, helium is extensively used in the fields of aerospace, low-temperature superconductivity, medicine and high tech,
Shengfei Qin +4 more
doaj +1 more source
Reduction of the Pressurization System Final Mass for a Modern Rocket Launcher [PDF]
Journal of Aerospace Technology and Management, 2022 The work focuses on optimizing the pressurization system’s operating performance for a fuel tank of a turbo-pumped liquid propellant rocket engine. This system is the most complex and expensive in a medium-size launch vehicle, after the engine.
Yurii Mitikov, Olexiy Shynkarenko
doaj +1 more source
Unimpeded Permeation of Water Through Helium-Leak–Tight Graphene-Based Membranes [PDF]
Science, 2011 Porous Membranes Thin semi-permeable membranes are commonly used as chemical barriers or for filtration purposes. While the size of the pores will influence which molecules are able to pass, other factors—including the surface chemistry of the pore walls,
R. Nair +4 more
semanticscholar +1 more source
Improving helium abundance determinations with Leo P as a case study [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 Currently, the primordial helium abundance is best estimated through spectroscopic observations of H II regions in metal-poor galaxies. However these determinations are limited by several systematic uncertainties which ultimately limit our ability to ...
E. Aver +5 more
semanticscholar +1 more source
Assessing the expansion of the Cambrian Agronomic Revolution into fan-delta environments
Scientific Reports, 2022 The intensity, extent, and ecosystem-level impact of bioturbation (i.e. Agronomic Revolution) at the dawn of the Phanerozoic is a hotly debated issue.
Andrei Ichaso +4 more
doaj +1 more source
Journal of Natural Gas Geoscience, 2022 Helium, a coordinated resource in natural gas, is an essential and strategic resource, but research on its enrichment mechanism is relatively weak.
Shengfei Qin +4 more
doaj +1 more source