Results 21 to 30 of about 559,916 (326)

Helium Ionization in the Diffuse Ionized Gas surrounding UCHII regions [PDF]

, 2017
We present measurements of the singly ionized helium to hydrogen ratio ($n_{He^+}/n_{H^+}$) toward diffuse gas surrounding three Ultra-Compact HII (UCHII ) regions: G10.15-0.34, G23.46-0.20 \& G29.96-0.02.
Anderson, L. D., Churchwell, E., Roshi, D. Anish   +2 more
core   +3 more sources

Constraints on the Velocity and Spatial Distribution of Helium-like Ions in the Wind of SMC X-1 from Observations with XMM-Newton/RGS [PDF]

, 2007
We present here X-ray spectra of the HMXB SMC X-1 obtained in an observation with the XMM observatory beginning before eclipse and ending near the end of eclipse.
Kallman, Timothy R., Liedahl, Duane A., Wojdowski, Patrick S.   +2 more
core   +2 more sources

Defying Lunar Dust: A Revolutionary Helmet Design to Safeguard Astronauts’ Health in Long-Term Lunar Habitats

Aerospace
Lunar dust remains one of the most critical unresolved challenges to long-duration lunar missions. Its sharp, abrasive, and electrostatically charged particles are easily inhaled and can penetrate deep into the lungs, reaching the bloodstream and the ...
Christopher Salvino, Kenneth Altshuler, Paul Beatty, Drew DeJarnette, Jesse Ybanez, Hazel Obana, Edwin Osabel, Andrew Dummer, Eric Lutz, Moe Momayez   +9 more
doaj   +1 more source

Physical Properties of Helium and Application in Respiratory Care

Encyclopedia, 2023
Helium is a low-density, inert, monoatomic gas that is widely used in medical applications. In respiratory care, Helium is mainly used as an adjunct therapy for patients with severe upper airway obstruction and asthma.
Eric Chappel
doaj   +1 more source

Coupling a single electron on superfluid helium to a superconducting resonator. [PDF]

, 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, Schuster, David I, Yang, Ge   +2 more
core   +3 more sources

Volatile‐Rich Hydrothermal Plumes Over the Southern Central Indian Ridge, 24°49’S: Evidence for a New Hydrothermal Field Hosted by Ultramafic Rocks

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, P. John Kurian, J. A. Resing, U. Tsunogai, A. Srinivas Rao, K. Sen, J. E. Lupton, T. Baumberger, A. Prajith, P. Roy   +9 more
doaj   +1 more source

Properties of Dense Fluid Hydrogen and Helium in Giant Gas Planets

, 2006
Equilibrium properties of hydrogen-helium mixtures under thermodynamic conditions found in the interior of giant gas planets are studied by means of density functional theory molecular dynamics simulations.
Burrows, Guillot, Kresse, Kresse, Kresse, Kresse, Mattson, Mayor, Militzer, Perdew, Pfaffenzeller, Rivera, Saumon, Troullier, Vorberger   +14 more
core   +2 more sources

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, Galloway, Alexander, McPherson, Norman   +2 more
core   +1 more source

Equivalence Ratio Effect on Helium Diluted Methane Jet Flame Temperature and Pollutant Emission for a Swirl Assisted Gas Turbine Burner

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  

The Hottest Horizontal-Branch Stars in omega Centauri - Late Hot Flasher vs. Helium Enrichment

, 2007
UV observations of some massive globular clusters uncovered a significant population of very hot stars below the hot end of the horizontal branch (HB), the so-called blue hook stars.
Bono, G., Calamida, A., Dreizler, S., Lanz, T., Moehler, S., Monelli, M., Nonino, M., Sweigart, A. V.   +7 more
core   +2 more sources