Results 51 to 60 of about 2,299,607 (281)

A bipartite separable ball and its applications

, 2015
In this paper, based on a matrix norm, we first present a ball of separable unnormalized states around the identity matrix for the bipartite quantum system, which is larger than the separable ball in Frobenius norm.
Li, Lei, Li, Ming, Shen, Shu-Qian
core   +1 more source

Brieskorn spheres bounding rational balls [PDF]

, 2017
Fintushel and Stern showed that the Brieskorn sphere $\Sigma(2,3,7)$ bounds a rational homology ball, while its non-trivial Rokhlin invariant obstructs it from bounding an integral homology ball.
Akbulut, Selman, Larson, Kyle
core   +2 more sources

Masked balls

Cambridge Opera Journal, 2002
In the course of his insightful analysis of Act II of Un ballo in maschera, Harold Powers recurs to two critics of earlier generations who hyperbolically describe how, to cite his more measured summary, ‘the drama has turned into music as the opera was being composed.
openaire   +2 more sources

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

Apparatus and method for inspecting a bearing ball [PDF]

, 1985
A method and apparatus for inspecting the surface of a ball bearing is disclosed which includes a base having a high friction non-abrasive base scanning surface. A holding device includes a cone-shaped cup recess in which a ball element is received.
Bankston, B. F.
core   +1 more source

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez, Alejandro F. Manchón‐Gordón, Antonio Vidal‐Crespo, Rafael Caballero‐Flores, Jhon J. Ipus, Clara F. Conde   +5 more
wiley   +1 more source

Evaluation on hitting performance of baseball bats and their selection according to swing ability of a player

Nihon Kikai Gakkai ronbunshu, 2017
In this study, a new technique has been proposed to quantitatively evaluate the hitting performance of baseball bats without affecting their initial pitching velocity; this technique is based on an earlier evaluation system developed to measure the same.
Hiroyuki KAGAWA, Masaya TAKAHASHI, Kazutaka SATO, Masato MIZOGUCHI, Takeshi YONEYAMA, Yujiro KITAGAWA, Hideaki NASU, Noriaki TAKEDA   +7 more
doaj   +1 more source

How Chaotic is the Stadium Billiard? A Semiclassical Analysis

, 1996
The impression gained from the literature published to date is that the spectrum of the stadium billiard can be adequately described, semiclassically, by the Gutzwiller periodic orbit trace formula together with a modified treatment of the marginally ...
Alonso D, Balian R, Balian R, Baltes H P, Berry M V, Berry M V, Berry M V, Berry M V, Berry M V, Boasman P A, Boasman P A, Bogomolny E B, Bohigas O, Bruus H, Bunimovich L A, Bäcker A, Casati G, Colin de Verdiere Y, Cvitanovic P, Cvitanovic P, Dahlqvist P, Dahlqvist P, Eckhardt B, Further details can be found in Reed M, Gregor Tanner, Gutzwiller M C, Hannay J H, Hansen K T, Keating J P, Keating J P, Ozorio de Almeida A M, Primak H, Reed M, Richter K, Schnirelman A I, Schuster H G, Sieber M, Sieber M, Szeredi T, Tanner G, Voros A, Voros A, Wintgen D, Wirzba A, Zelditch S   +44 more
core   +1 more source

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Testing QCD Sum Rules on the Light-Cone in D->(pi,K) l nu Decays

, 2006
We compare the predictions for the form factors f_+^{D->pi,K}(0) from QCD sum rules on the light-cone with recent experimental results. We find f_+^{D->pi}(0) = 0.63\pm 0.11, f_+^{D->K}(0) = 0.75\pm 0.12 and f_+^{D->pi}(0)/f_+^{D->K}(0)= 0.84\pm 0.04 in ...
Abe, Ablikim, Artuso, Aubert, Aubin, Bagan, Balitsky, Ball, Ball, Ball, Ball, Ball, Ball, Ball, Ball, Ball, Ball, Ball, Ball, Becher, Becirevic, Boyle, Braun, Braun, Braun, Braun, Buchmüller, Chernyak, Chernyak, Chetyrkin, Flynn, Gamiz, Göckeler, Ikado, Khodjamirian, Khodjamirian, Khodjamirian, Knechtli, Leutwyler, Link, Mackenzie, Mueller, Okamoto, Patricia Ball, Shifman, Shifman, Widhalm, Yao   +47 more
core   +2 more sources