Results 101 to 110 of about 120,595 (308)

Modeling Molecular Hydrogen and Star Formation in Cosmological Simulations

, 2009
We describe a phenomenological model for molecular hydrogen formation suited for applications in galaxy formation simulations, which includes on-equilibrium formation of molecular hydrogen on dust and approximate treatment of both its self-shielding and ...
Andrey V. Kravtsov, Bigiel, Blitz, Blitz, Brooks, Browning, Cazaux, Ceverino, Chen, Croft, Das, Downes, Galli, Gibson, Gillmon, Glover, Glover, Goldsmith, Heyer, Kennicutt, Kennicutt, Konstantinos Tassis, Kravtsov, Kravtsov, Kravtsov, Kravtsov, Krumholz, Krumholz, Krumholz, Leroy, Leroy, Matthews, Mayer, Nickolay Y. Gnedin, Ostriker, Padoan, Pelupessy, Razoumov, Robertson, Schaye, Tasker, Tassis, Tumlinson, Wolfe, Wolfire, Wolfire, Wong, Wyder   +47 more
core   +1 more source

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

Advanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa, Aparna Saksena, Alesander Kostka, Pascal Thome, Felicitas Scholz, Alexandre Mussi, Christoph Somsen, Baptiste Gault, Jan Frenzel, Gunther Eggeler   +9 more
wiley   +1 more source

Neutron shielding and activation of the MASTU device and surrounds

, 2014
A significant functional upgrade is planned for the Mega Ampere Spherical Tokamak (MAST) device, located at Culham in the UK, including the implementation of a notably greater neutral beam injection power.
Davis, Andrew, Lilley, Steven, Taylor, David, Turner, Andrew   +3 more
core   +1 more source

Recent Advances in Nuclear Shielding Calculations [PDF]

, 2012
Abstract Nuclear magnetic shielding calculations have reached a great deal of sophistication, as these now incorporate both relativistic and correlation effects. Approaches now include molecular dynamics as well as effects of the medium in condensed phases.
Angel C. de Dios, Cynthia J. Jameson
openaire   +1 more source

Characterization of Macro/Microstructure and Corrosion Resistance of Austenitic Gas Tungsten Arc Welding Cladding

Advanced Engineering Materials, EarlyView.
Cladding is a proven method that boosts the surface qualities of mechanical parts by applying a layer of more durable material over a base substrate. This work responds to the needs of offshore and pressure vessels sectors by focusing on cladding a super austenitic steel onto low‐carbon steel through gas tungsten arc welding.
E. J. da Cruz Junior, F. M. F. A. Varasquim, F. O. Carvalho, L. F. F. Santiago, V. A. Ventrella, I. Calliari, M. Pigato   +6 more
wiley   +1 more source

Cosmogenic rare gases and 10-Be in a cross section of Knyahinya [PDF]

The concentrations of cosmogenic nuclides were studied as a function of shielding on samples from a cross section of the 293 kg main fragment of the L5 chondrite Knyahinya. The stone broke into two nearly symmetrical parts upon its fall in 1866.
Bonani, G., Herpers, U., Hofmann, H. J., Morenzoni, E., Nessi, M., Sarafin, R., Signer, P., Suter, M., Wieler, R., Woelfli, W.   +9 more
core   +1 more source

An ab-initio converse NMR approach for pseudopotentials

, 2010
We extend the recently developed converse NMR approach [T. Thonhauser, D. Ceresoli, A. Mostofi, N. Marzari, R. Resta, and D. Vanderbilt, J. Chem. Phys. \textbf{131}, 101101 (2009)] such that it can be used in conjunction with norm-conserving, non-local ...
Ceresoli, D., Lopez, G., Marzari, N., Thonhauser, T.   +3 more
core   +1 more source

Calculated-Experimental Model for Multilayer Shield

Aro, The Scientific Journal of Koya University, 2015
The effective linear attenuation coefficients and build-up factors for single shield of Al, Fe, Pb, and for multi-layer shield of Al-Pb, Al-Fe, Fe-Pb, Al-Fe-Pb as a function of shield thickness, atomic number, and order of the materials composing the shield are investigated for two photon energies of 0.662 MeV and 1.25 MeV.
Maan S. Al-Arif, Diyaree O. Kakil
openaire   +2 more sources

Numerical Modeling of Tank Cars Carrying Hazardous Materials With and Without Composite Metal Foam

Advanced Engineering Materials, EarlyView.
Large‐scale puncture models consisting of hazardous materials (HAZMATs) tank car with protective steel–steel composite metal foam (S–S CMF) are solved numerically. Tank car plate with added 10.91–13.33 mm thick S–S CMF layer does not puncture. Protective S–S CMF absorbs impact energy, reduces plate deformation, and prevents shear bands formation ...
Aman Kaushik, Afsaneh Rabiei
wiley   +1 more source

A Simple Method to Eliminate Shielding Currents Generated when Magnetization is Perpendicular to Superconducting Tapes Wound into Coils

, 2011
Application of an external AC magnetic field parallel to superconducting tapes helps in eliminating the magnetization caused by the shielding current induced in the flat faces of the tapes.
Funaki, Kazuo, Kajikawa, Kazuhiro
core   +1 more source