Results 31 to 40 of about 237,124 (270)

Kinetic theory of spatially inhomogeneous stellar systems without collective effects [PDF]

, 2012
We review and complete the kinetic theory of spatially inhomogeneous stellar systems when collective effects (dressing of the stars by their polarization cloud) are neglected.
Chavanis, Pierre-Henri
core   +2 more sources

A Chebychev propagator for inhomogeneous Schrödinger equations [PDF]

The Journal of Chemical Physics, 2009
A propagation scheme for time-dependent inhomogeneous Schrödinger equations is presented. Such equations occur in time dependent optimal control theory and in reactive scattering. A formal solution based on a polynomial expansion of the inhomogeneous term is derived. It is subjected to an approximation in terms of Chebychev polynomials.
Ndong, Mamadou, Tal-Ezer, Hillel, Kosloff, Ronnie, Koch, Christiane P.   +3 more
openaire   +3 more sources

A Chebychev propagator with iterative time ordering for explicitly time-dependent Hamiltonians

, 2009
A propagation method for time-dependent Schr\"odinger equations with an explicitly time-dependent Hamiltonian is developed where time ordering is achieved iteratively. The explicit time-dependence of the time-dependent Schr\"odinger equation is rewritten
Allen L. C., Christiane P. Koch, Hillel Tal-Ezer, Mamadou Ndong, Ronnie Kosloff, Tannor D. J.   +5 more
core   +1 more source

QCD S Parameter from Inhomogeneous Bethe-Salpeter Equation [PDF]

, 1994
We calculate the low-energy parameter S in QCD, which is also known as L_{10}, and the pion decay constant f_\pi using inhomogeneous Bethe-Salpeter equation in improved ladder approximation.
B. Holdom, B. Holdom, B. Holdom, B. Holdom, G. Altarelli, G. Ecker, I. Aoki, I. Aoki, J. Bijnens, J. Gasser, J. Gasser, J. Gasser, J.F. Donoghue, J.F. Donoghue, K. Higashijima, K. Hikasa, K. Yamawaki, M. Peskin, M.A. Shifman, Masayasu Harada, P. Jain, S. Weinberg, T. Akiba, T. Appelquist, T. Appelquist, T. Das, T. Inami, T. Kugo, T. Kugo, T. Takeuchi, V. Miransky, Yuhsuke Yoshida   +31 more
core   +3 more sources

Free Energy of an Inhomogeneous Superconductor: a Wave Function Approach

, 1998
A new method for calculating the free energy of an inhomogeneous superconductor is presented. This method is based on the quasiclassical limit (or Andreev approximation) of the Bogoliubov-de Gennes (or wave function) formulation of the theory of weakly ...
A. A. Abrikosov, A. E. Jacobs, A. E. Jacobs, A. F. Andreev, A. Schmid, Anthony J. Leggett, C. Caroli, C. J. Pethick, C. R. Hu, C. R. Hu, D. E. McCumber, D. Hone, D. Waxman, D. Y. Chen, E. Abrahams, E. Witten, F. Schwabl, F. Sharifi, G. Blatter, G. Eilenberger, G. Junker, H. T. C. Stoof, I. J. R. Aitchison, I. M. Gelfand, I. S. Gradshteyn, Ioan Kosztin, J. Bar-Sagi, J. Bar-Sagi, J. Bardeen, J. Bardeen, J. Bardeen, J. Feinberg, J. R. Schrieffer, J. S. Langer, J. W. Serene, L. A. Dickey, L. E. Gendenshtein, L. G. Azlamazov, L. Infeld, L. J. Buchholtz, L. J. Buchholtz, L. P. Gor’kov, L. Tewordt, M. Fogelstrom, M. Greiter, M. Stone, Michael Stone, N. Giordano, N. R. Werthamer, N. R. Werthamer, P. Ao, P. G. de Gennes, P. Nozieres, P. W. Anderson, R. Balian, R. M. Cleary, R. M. Cleary, S. Saito, S. Saito, V. N. Popov, W. L. Clinton, W. N. Mathews, Jr., W. Stephen, X. S. Ling, Y. B. Kimm, Šimon Kos   +65 more
core   +1 more source

Shock waves from the inhomogeneous Boltzmann equation [PDF]

Physical Review E, 2019
We revisit the problem on the inner structure of shock waves in simple gases modelized by the Boltzmann kinetic equation. In \cite{pomeau1987shock}, a self-similarity approach was proposed for infinite total cross section resulting from a power law interaction, but this self-similar form does not have finite energy.
Pomeau, Yves, Tran, Minh-Binh
openaire   +3 more sources

Dynamic Precipitation during High‐Pressure Torsion of a Magnesium–Manganese Alloy

Advanced Engineering Materials, EarlyView.
An ultrafine‐grained alloy is produced by high‐pressure torsion of solutionized Mg–1.35 wt% Mn. Precipitation of nanometer‐scale Mn particles during deformation provides pinning sites. This prevents the formation of a bimodal grain structure and results in a finer grain size than for pure Mg.
Julian M. Rosalie, Anton Hohenwarter
wiley   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Constraining smoothness parameter and the DD relation of Dyer-Roeder equation with supernovae

, 2013
Our real universe is locally inhomogeneous. Dyer and Roeder introduced the smoothness parameter $\alpha$ to describe the influence of local inhomogeneity on angular diameter distance, and they obtained the angular diameter distance-redshift approximate ...
Yang, Xi, Yu, Hao-Ran, Zhang, Tong-Jie
core   +1 more source

Composite Electrospun Fibers Containing Optimized B‐ and Cu‐Doped Bioactive Glass Sol‐Gel Particles for Potential Soft Tissue Engineering Applications

Advanced Engineering Materials, EarlyView.
This article describes the preparation and characterization of poly(ε‐caprolactone) electrospun composite fibers incorporating sol‐gel‐derived bioactive glass particles doped with B and Cu. Scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, Fourier‐transform infrared spectroscopy, contact angle, acellular bioactivity, mechanical and ...
Elisa Piatti, Marta Miola, Liliana Liverani, Paolo Sartori, Enrica Verné, Aldo R. Boccaccini   +5 more
wiley   +1 more source