Results 61 to 70 of about 601,537 (357)
Havacılık ve Uzay Teknolojileri Dergisi, 2023 Temperature distribution and flue gas emissions in gas turbine combustion chambers have attracted the attention of researchers in recent years.
Buğrahan Alabaş, Adem Altınay
doaj
Kvasný průmysl, 2013 Gas chromatography often uses helium, hydrogen, and nitrogen as carrier gases. The most common carrier gas is helium since it provides good separations, is inert, and is safe to use.
Tomáš HORÁK +3 more
doaj +1 more source
Classified characteristics of helium gas resources and controlling factors for the enrichment
Shiyou shiyan dizhi, 2023 The lack of helium resources accounts for the limited helium supply in China. It is of great significance to classify of helium-enriched natural gas according to the characteristics of helium reservoirs and the main controlling factors of helium ...
Xinjun CHEN +3 more
doaj +1 more source
Kinematics of Subluminous O and B Stars by Surface Helium Abundance [PDF]
, 2017 The majority of hot subdwarf stars are low-mass core-helium-burning stars. Their atmospheres are generally helium deficient; however a minority have extremely helium-rich surfaces. An additional fraction have an intermediate surface-helium abundance, occasionally accompanied by peculiar abundances of other elements.
arxiv +1 more source
Light dark matter in superfluid helium: Detection with multi-excitation production [PDF]
, 2016 © 2017 American Physical Society. We examine in depth a recent proposal to utilize superfluid helium for direct detection of sub-MeV mass dark matter. For sub-keV recoil energies, nuclear scattering events in liquid helium primarily deposit energy into ...
S. Knapen, Tongyan Lin, K. Zurek
semanticscholar +1 more source
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 +5 more sources
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose The aim of this work was to report on the optimization, commissioning, and validation of a beam model using a commercial independent dose verification software RadCalc version 7.2 (Lifeline Software Inc, Tyler, TX, USA), along with 4 years of experience employing RadCalc for offline and online monitor unit (MU) verification on the ...
Urszula Jelen +3 more
wiley +1 more source
Helium accreting CO white dwarfs with rotation: helium novae instead of double detonation [PDF]
Astron.Astrophys. 419 (2004) 645, 2004 We present evolutionary models of helium accreting carbon-oxygen white dwarfs in which we include the effects of the spin-up of the accreting star induced by angular momentum accretion, rotationally induced chemical mixing and rotational energy dissipation. Initial masses of 0.6 Msun and 0.8 Msun and constant accretion rates of a few times 10^{-8} Msun/
arxiv +1 more source
Nanopore fabrication and characterization by helium ion microscopy [PDF]
, 2016 The Helium Ion Microscope (HIM) has the capability to image small features with a resolution down to 0.35 nm due to its highly focused gas field ionization source and its small beam-sample interaction volume.
Daniel Emmrich +6 more
semanticscholar +1 more source
Low‐Activation Compositionally Complex Alloys for Advanced Nuclear Applications—A Review
Advanced Engineering Materials, EarlyView.Low‐activation compositionally complex alloys (LACCAs) are advanced metallic materials primarily composed of low‐activation elements, offering advantages such as rapid compliance with operational standards and safe recyclability. This review highlights their potential for extreme high‐temperature irradiation environments as structural materials for ...
Yangfan Wang +8 more
wiley +1 more source