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Title: Nonlinear analysis of inter-area oscillations: Effect of SVC voltage support
Author: Prez Ladron De Guevara, H.
Rodriguez, A.G.
Navarro-Contreras, H.
Vidal, M.A.
Issue Date: 2007
Abstract: The optical energy gap of Ge1-x Snx alloys (x?0.14) grown on Ge substrates has been determined by performing transmittance measurements at 4 K using a fast fourier transform infrared interferometer. The direct energy gap transitions in Ge1-x Snx alloys behave following a nonlinear dependence on the Sn concentration, expressed by a quadratic equation, with a so called bowing parameter b0 that describes the deviation from a simple linear dependence. Our observations resulted in b0RT =2.30 0.10 eV and b0 4 K =2.84 0.15 eV, at room temperature and 4 K, respectively. The validity of our fit is limited for Sn concentrations lower than 15%. " 2007 American Institute of Physics.",,,,,,"10.1063/1.2800296",,,"","",,,,,,"16",,"Applied Physics Letters",,,,"91",,"Scopus",,,,,,,,,,,,"Nonlinear behavior of the energy gap in Ge1-x Snx alloys at 4 K",,"Article" "43107","123456789/35008",,"Loske, A.M., Ctro. de Fis. Apl. y Tecn. Avanzada, UNAM, Querétaro, Qro., Mexico, Ctro. de Fis. Apl. y Tecn. Avanzada, UNAM, A.P. 1-1010, 76000 Querétaro, Qro., Mexico; Prieto, F.E., Ctro. de Fis. Apl. y Tecn. Avanzada, UNAM, Querétaro, Qro., Mexico; Gutierrez, J., Departamento de Urología, Nuevo Hospital Civil, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico; Zendejas, H., Facultad de Ciencias Naturales, Universidad Autonoma de Queretaro, Querétaro, Mexico; Saita, A., Departamento de Urología, Nuevo Hospital Civil, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico; Velez Gomez, E., Departamento de Patología, Nuevo Hospital Civil, Universidad de Guadalajara, Guadalajara, Mexico",,"Loske, A.M.
Prieto, F.E.
Gutierrez, J.
Zendejas, H.
Saita, A.
Velez Gomez, E.",,"2004",,"Purpose: To perform in vitro and in vivo tests using a clinical lithotripter in order to determine whether a bifocal reflector is more efficient and produces the same or less tissue damage than a conventional ellipsoidal reflector for electrohydraulic lithotripters. Materials and Methods: A standard ellipsoidal and a novel bifocal reflector were tested on a Tripter Compact lithotripter (Direx Medical Systems, Petach Tikva, Israel). The bifocal reflector was constructed by joining two sectors of two rotationally symmetrical ellipsoidal reflectors having different distances between their foci. The F1 foci of the sectors coincided, creating a separation between the F2 foci. The fragmentation efficiency of the reflectors was compared using kidney-stone models. Shockwave-induced trauma was evaluated in vivo by treating both kidneys of six healthy dogs. One kidney was exposed to shockwaves generated with the conventional reflector, and the other kidney was treated using the bifocal reflector. Pressure measurements were obtained for both reflectors using needle hydrophones. Results: The new design appeared to be more efficient than the conventional reflector in breaking up kidney-stone models. Tissue damage did not increase when using the bifocal reflector. Conclusion: The use of bifocal, instead of standard ellipsoidal, reflectors should be considered as an alternative to improve extracorporeal shockwave lithotripsy.",,,,,,,,,"","",,,,,,"1",,"Journal of Endourology",,"7
WOS",,,,,,,,,,,,"Evaluation of a Bifocal Reflector on a Clinical Lithotripter",,"Article" "43183","123456789/35008",,,"Arechavala Vargas, Ricardo",,"2001",,,,,,,,,,"0185-2760",,"",,"Español",,,,"118",,"Relaciones (Zamora,",,"101-122",,"30",,"CLASE",,,,,,,,"Educación superior",,"El gobierno de las universidades públicas:¿es posible comprender un sistema caótico?","El gobierno de las universidades públicas",,,"journalArticle", "44970","123456789/35008",,"Messina, A.R., Graduate Program in Electrical Eng., Cinvestav, P.O. Box 31-438, Guadalajara Jal. 44550, Mexico; Barocio, E., Department of Mathematics, University of Guadalajara, Guadalajara Jal. 44480, Mexico",,"Messina, A.R.
Barocio, E.",,"2003",,"Nonlinear modal interaction between system modes is known to contribute to different properties in physical processes. This paper discusses the experience in the use of perturbation theory to study nonlinear system performance in stressed power transmission networks that include multiple flexible a.c. transmission systems controllers. First, an analytical derivation is developed which is used to investigate the effect of static VAR compensators (SVCs) on system nonlinear dynamic behavior. Normal form theory is then applied to study nonlinear modal interaction between SVC control modes and inertial modes. The proposed procedure is demonstrated on the WSCC 4-areas test system. Results of the second-order normal form study are presented and techniques for implementing each phase are discussed. " 2002 Elsevier Science B.V. All rights reserved.
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