André Weil, Souvenirs d’apprentissage. Basel, Boston, Berlin, Birkhäuser, 1991.201 S. 111. (VitaMathematica,vol. 6). SFr. 78. . ISBN 3-7643-2500-3 ; 0-8176-2500-3.

Stability of time-delay systems, Keqin Gu, Vladimir L. Kharitonov, Jie Chen, Birkhäuser, Boston, 2003, ISBN 0-8176-4212-9

The importance of time delays in control is now well recognized in a wide range of applications (transportation systems, communication networks, teleoperation systems, etc.). However, even if some fundamental results were obtained 40 years ago during the early space explorations (Bellman & Cooke, 1963; Morse, 1976; Kamen, 1978; Manitius & Triggiani, 1978), time-delay systems have actually been ...

Visual Performance of Tecnis ZM900 Diffractive Multifocal IOL after 2500 Implants: A 3-Year Followup

Purpose. To evaluate visual performance for near, intermediate, and distant vision; complaints of photic phenomena, and patient satisfaction with the new diffractive multifocal IOL used in eyes which underwent phacoemulsification. Methods. Two thousand and five hundred consecutive eyes undergoing Tecnis ZM900 multifocal IOL implantation were included in this retrospective analysis. The minimum ...

Pressure dependence of the Mg 3 s 4 s 3 S 1 → 3 s 3 p 3 P 0 , 1 , 2 transition in superfluid 4

The pressure shifts of the 3s4sS1 → 3s3p P0,1,2 transition of magnesium atoms immersed in superfluid helium have been measured at (1.3± 0.1 )K between saturated vapour pressure and 24 bar. The wavelength is blue shifted linearly by (0.07 ± 0.01) nm bar . This value can be satisfactorily described in the framework of the standard bubble model. PACS. 67.40.Yv Impurities and other defects – 32.50+...

Semantics of S . S . M . ( Safe State Machine ) Charles André I 3 S

New class of ruthenium sulfide clusters: Ru(4)S(6)(PPh(3))(4), Ru(5)S(6)(PPh(3))(5), and Ru(6)S(8)(PPh(3))(6).

Reaction of RuCl(2)(PPh(3))(3) with S(2)(-) sources yields a family of phosphine-containing Ru-S clusters which have been characterized crystallographically and by MALDI-MS. Ru(4)S(6)(PPh(3))(4) (Ru-Ru(av) = 2.94 A) has idealized T(d)() symmetry whereas Ru(6)S(8)(PPh(3))(6) (Ru-Ru(av) = 2.82 A) adopts the idealized O(h)() symmetry characteristic of Chevrel clusters. Ru(5)S(6)(PPh(3))(5) is form...