Results 31 to 40 of about 186,527 (312)

Investigation of suitability of the method of volume averaging for the study of heat transfer in superconducting accelerator magnet cooled by superfluid helium. [PDF]

, 2013
In the field of applied superconductivity, there is a growing need to better understand heat transfers in superconducting accelerator magnets. Depending on the engineering point of view looked at, either 0-D, 1-D, 2D or 3D modeling may be needed. Because
Prat, Marc, Van Weelderen, Rob, Allain, Hervé, Quintard, Michel, Baudouy, Bertrand, Soulaine, Cyprien   +5 more
core   +1 more source

An ellipsoidal mirror for focusing neutral atomic and molecular beams [PDF]

, 2010
Manipulation of atomic and molecular beams is essential to atom optics applications including atom lasers, atom lithography, atom interferometry and neutral atom microscopy.
Galas, J., Sondergard, E., Reisinger, T., Miranda, R., Fladischer, K., Farias, D., Ernst, W.E., Piatkowski, B., Mayrhofer, V., Surma, B., Miros, A., Holst, B., Reingruber, H., Allison, W., Sitarek, S., Allison,, W., Nieto, P., Ross, A.E., Barredo, D., MacLaren, D.A., Litwin, D.   +20 more
core   +1 more source

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

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, Patryk Kwapień, T. Allen Merritt   +2 more
doaj   +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, Flynn, Chris, MacDonald, James, Gibson, Brad K.   +3 more
openaire   +4 more sources

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, J. M. De Moor, J. M. De Moor, A. Chiodi, F. Aguilera, F. Aguilera, M. R. Hudak, D. V. Bekaert, S. J. Turner, J. Curtice, A. M. Seltzer, G. L. Jessen, G. L. Jessen, E. Osses, J. M. Blamey, M. J. Amenábar, M. Selci, M. Cascone, A. Bastianoni, M. Nakagawa, R. Filipovich, E. Bustos, M. O. Schrenk, J. Buongiorno, C. J. Ramírez, T. J. Rogers, K. G. Lloyd, D. Giovannelli, D. Giovannelli, D. Giovannelli, D. Giovannelli   +30 more
doaj   +1 more source

Fabrication and ab initio study of downscaled graphene nanoelectronic devices [PDF]

, 2012
In this paper we first present a new fabrication process of downscaled graphene nanodevices based on direct milling of graphene using an atomic-size helium ion beam. We address the issue of contamination caused by the electron-beam lithography process to
Marek E. Schmidt, Harvey N. Rutt, Moktadir, Zakaria, Tsuchiya, Yoshishige, Manoharan Muruganathan, Shuojin Hang, Darren M. Bagnall, Harold Chong, Hiroshi Mizuta, Kalhor, Nima, Chi, Dam Hieu, Cuong, Nguyen Tien, Boden, Stuart A., Chong, Harold, Mizuta, Hiroshi, Rutt, Harvey N., Dam Hieu Chi, Schmidt, Marek E., Stuart A. Boden, Zakaria Moktadir, Nima Kalhor, Yoshishige Tsuchiya, Bagnall, Darren M., Muruganathan, Manoharan, Nguyen Tien Cuong, Otsuka, Nobuo, Nobuo Otsuka, Hang, Shuojin   +27 more
core   +1 more source

Effect of helium as process gas on laser powder bed fusion of Ti-6Al-4V studied with operando diffraction and radiography

European Journal of Materials, 2022
The utilisation of helium as process gas in laser powder bed fusion limits the generation of Ti-6Al-4V hot and incandescent spatters and enhances their cooling rate.
Camille Pauzon, Steven Van Petegem, Eduard Hryha, Cynthia Sin Ting Chang, Samy Hocine, Helena Van Swygenhoven, Charlotte de Formanoir, Sophie Dubiez-Le Goff   +7 more
doaj   +1 more source

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

Time‐restricted feeding prior to Mycobacterium tuberculosis infection reduces tissue CD4+ T cells with limited impact on bacterial clearance

FEBS Open Bio, EarlyView.
Time‐restricted feeding (TRF) in mice increased liver fatty acid oxidation and decreased fatty acid biosynthesis. These alterations persisted when TRF was discontinued and the host was infected with Mycobacterium tuberculosis. Pre‐exposure to TRF did not alter tissue (lung and spleen) mycobacterial burden but significantly reduced CD3+ T cells in lungs
Ashish Gupta, Nidhi Yadav, Subhasmita Das, R. Rajendra Kumar Reddy, Nupur Sharma, Amol Ratnakar Suryawanshi, Jaswinder Singh Maras, Ranjan Kumar Nanda   +7 more
wiley   +1 more source