Results 61 to 70 of about 695,127 (377)
Arc pressure and weld metal fluid flow whilst using alternating shielding gases Part 2 : arc force determination [PDF]
, 2013 The transient variation of the shielding gas present in the alternating shielding gas process produces a dynamic action within the liquid weld metal. Flow vectors opposite in direction have been reported due to the various forces acting on the weld metal
Campbell, Stuart +2 more
core +1 more source
The effects of He I λ10830 on helium abundance determinations [PDF]
, 2015 Observations of helium and hydrogen emission lines from metal-poor extragalactic H II regions, combined with estimates of metallicity, provide an independent method for determining the primordial helium abundance, Yp.
E. Aver, K. Olive, E. Skillman
semanticscholar +1 more source
Key mechanistic features of swelling and blistering of helium-ion-irradiated tungsten [PDF]
, 2019 Helium-ion-induced swelling and blistering of single-crystal tungsten is investigated using a Helium Ion Microscope for site-specific dose-controlled irradiation (at 25 keV) with analysis by Helium Ion Microscopy, Atomic Force Microscopy and Transmission
Allen, FI, Balooch, M, Hosemann, P
core +2 more sources
Helium in the Atmosphere [PDF]
Nature, 1898 THE discovery of helium lines in the spectrum of neon, by Mr. E. C. C. Baly, will necessitate a modification of the views we have expressed in our communication to the British Association at Bristol. We there estimated the density of neon at 9.6, allowing for the presence of a certain proportion of argon unavoidably left in the neon.
Ramsay, William, Travers, Morris W.
openaire +5 more sources
Neutrino Degeneracy and Chemically Inhomogeneous Universe [PDF]
, 1999 A possibility that the universe may be strongly inhomogeneous chemically, while very smooth energetically, is considered. A possible mechanism which could lead to such a picture is a large and inhomogeneous lepton asymmetry.
Dolgov, A. D.
core +3 more sources
Influence of Gas Density and Plug Diameter on Plume Characteristics by Ladle Stirring
Crystals, 2021 The paper presents new results concerning the influence of the gas density and porous plug diameter on the nature of liquid steel stirring with an inert gas in the ladle.
Dmitrii Riabov +3 more
doaj +1 more source
Helium Atmospheres on Warm Neptune- and Sub-Neptune-Sized Exoplanets and Applications to GJ 436 b [PDF]
, 2015 Warm Neptune- and sub-Neptune-sized exoplanets in orbits smaller than Mercury's are thought to have experienced extensive atmospheric evolution. Here we propose that a potential outcome of this atmospheric evolution is the formation of helium-dominated ...
Hu, Renyu, Seager, Sara, Yung, Yuk L.
core +3 more sources
Advanced Functional Materials, EarlyView.The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal +10 more
wiley +1 more source
A narrative review of particle therapy in cancer
Cancer Research, Statistics, and Treatment, 2023 The use of high-energy charged particles in radiotherapy has evolved into an advanced cancer treatment. Even though proton beams and carbon ions are currently the popular particles used for radiotherapy in cancer, ions such as pions, helium, argon, and ...
Mayakannan Krishnan, C P Ranjith
doaj +1 more source