2,431 research outputs found
SANCHEZ CAMPA, G. y Rafael Félix ARELLANO
No full textTelegram from Misters G. Sánchez Campa and Rafael Félix Arellano, from Jerez, Zacatecas, to Gen. Alvaro Obregón, requesting information on the support the General is allegedly giving to Mr. Rudesindo Berumen for his campaign for representative of the District. The formers tell the General that Mr. Berumen is a delinquent. / Telegrama de los Srs. G. Sánchez Campa y Rafael Félix Arellano, de Jerez, Zac. al Gral. Alvaro Obregón, solicitando informes sobre el apoyo que supuestamente está dando al Sr. Rudesindo Berumen en su campaña para diputado por el Distrito y le informan que es un delincuente
SANCHEZ CAMPA, G. y Rafael Félix ARELLANO
No full textTelegram from Misters G. Sánchez Campa and Rafael Félix Arellano, from Jerez, Zacatecas, to Gen. Alvaro Obregón, requesting information on the support the General is allegedly giving to Mr. Rudesindo Berumen for his campaign for representative of the District. The formers tell the General that Mr. Berumen is a delinquent. / Telegrama de los Srs. G. Sánchez Campa y Rafael Félix Arellano, de Jerez, Zac. al Gral. Alvaro Obregón, solicitando informes sobre el apoyo que supuestamente está dando al Sr. Rudesindo Berumen en su campaña para diputado por el Distrito y le informan que es un delincuente
Recovery time profiling after short-, middle-and long-distance swimming performance
No full textPiras, A, Cortesi, M, Campa, F, Perazzolo, M, and Gatta, G. Recovery time profiling after short-, middle- and long-distance swimming performance. J Strength Cond Res 33(5): 1408-1415, 2019-We investigated cardiac autonomic responses and hemodynamic parameters on recovery time after short-, middle- and long-swimming performance. Ten male regional-level swimmers were tested to estimate time and frequency domains of arterial baroreflex sensitivity (BRS) and heart rate variability after 100, 200, and 400 m of front crawl. We found a BRS reduction for 90 minutes after a maximal 100- and 200-m front crawl event, meanwhile the reflex was restored back to the baseline value approximately 70 minutes after 400 m. The vagally mediated high-frequency power of R-R intervals was significantly reduced for 30 minutes after 400 m, and more than 90 minutes after 100 and 200 m, with a concomitant increase of sympathetic modulation. After 400 m, athletes have reduced their stroke volume for 50 minutes, which remained at the baseline level after 100 and 200 m. Heart rate was restored back after 90 minutes in all conditions, whereas total peripheral vascular resistance was significantly reduced for 50 minutes after 200 and 400 m, with a persistent reduction after 100 m. Time course of autonomic recovery after 3 different swimming performances is influenced by exercise intensity and duration, showing a rapid recovery after 400 m, an intermediate recovery after 200 m, and a significantly delayed recovery after a more strictly anaerobic performance like 100 m of front crawl. These results could encourage coaches to consider that athlete might be affected by the specific recovery time of the previous exercise performed, suggesting that the management of the exercise intensity, and appropriate monitoring of cardiac autonomic parameters might be helpful to know the physical condition of each athlete
CAMPA, Pedro F. y DALY, Peter M. (Eds.), Emblematic Images & Religious Texts. Studies in Honor of G. Richard Dimler, S.J.
No full text[Resumen] Reseña del libro Emblematic Images & Religious Texts. Studies in Honor of G. Richard Dimler, S. J., editado por Pedro F. Campa, y Peter M. Daly en Filadelfia, Saint Joseph’s University Press, 2010, Early Modern Catholicism and the Visual Arts Series, vol. 2, 364 pp., ISBN: 978-0-916101-61-9.[Abstract] Review on the book Emblematic Images & Religious Texts. Studies in Honor of G. Richard Dimler, S. J., edited by Pedro F. Campa and Peter M. Daly in Filadelfia, Saint Joseph’s University Press, 2010, Early Modern Catholicism and the Visual Arts Series, vol. 2, 364 pp., ISBN: 978-0-916101-61-
Design of a Neural Network Adaptive Controller via a Constrained Invariant Ellipsoids Technique
No full textIn safety critical applications, control architectures based on adaptive neural networks (NNs) must satisfy strict design specifications. This paper presents a practical approach for designing a mixed linear/adaptive model reference controller that recovers the performance of a reference model, and guarantees the boundedness of the tracking error within an a priori specified compact domain, in the presence of bounded uncertainties. The linear part of the controller results from the solution of an optimization problem where specifications are expressed as linear matrix inequality constraints. The linear controller is then augmented with a general adaptive NN that compensates for the uncertainties. The only requirement for the NN is that its output must be confined within pre-specified saturation limits. Toward this end a specific NN output confinement algorithm is proposed in this paper. The main advantages of the proposed approach are that requirements in terms of worst-case performance can be easily defined during the design phase, and that the design of the adaptation mechanism is largely independent from the synthesis of the linear controlle
Integrated design of a linear/neuro-adaptive controller in the presence of norm-bounded uncertainties
No full textAdaptive neural controllers are often criticised for the lack of clear and easy design methodologies that relate adaptive neural network (NN) design parameters to performance requirements. This study proposes a methodology for the design of an integrated linear-adaptive model reference controller that guarantees component-wise boundedness of the tracking error within an a priori specified compact domain. The approach is based on the design of a robust invariant ellipsoidal set where both the NN reconstruction error and the neuro-adaptive control are considered as bounded persistent uncertainties. We show that all the performance and control requirements for the closed-loop system can be expressed as linear matrix inequality constraints. This brings the advantage that feasibility and optimal design parameters can be effectively computed while solving a linear optimisation problem. An advantage of the method is that it allows a systematic and quantitative evaluation of the interplay between the design parameters and their impact on the requirements. This produces an integrated linear/ neuro-adaptive performance-oriented design methodology
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