17,379 research outputs found
ESPINOSA H., Anastasio (Mayor)
No full textEl Mayor Anastasio Espinosa H. solicita ayuda pecuniaria al Gral. PEC para un viaje de su familia
ESPINOSA, H. (Lic.)
No full textEl Lic. H. Espinosa solicita al Gral. PEC intervenga para que Andrés Alvarado, hermano del finado Gral. Salvador Alvarado, y sus hijos, quienes se encuentran en situación económica difícil, disfruten de la herencia de este último ya que ellos también son sus herederos legales junto con la viuda del General, quien es la única que está disfrutando de dicha herencia
Título: Atlas para el viage de las goletas Sutil y Mexicana al reconocimiento del estrecho de Juan de Fuca en 1792 publicado en 1802
No full textEl autor de la "Relación" es Dionisio Alcalá Galiano y el de la "Introducción" a la misma es Martín Fernández de Navarrete (p. I-CLXVII) y fue editor literario José Espinosa y Tello (menciones de responsabilidad tomadas de: Boletín de ANABAD, t. 41 (1991), n. 1, p. 154-157.Tit. del volumen segundo: "Atlas para el Viage de las goletas Sutil y Mexicana al reconocimiento del estrecho de Juan de Fuca en 1792 publicado en 1802"T. I. ([16], CLXVIII, 185 p., [1] h. pleg.) -- t. II. ([4] p., 17 h. de grab. calc.)Port. con esc. xil. real. La p. CLXVIII corresponde a la "Advertencia [sobre el uso del Atlas]"Las h. de grab. del "Atlas" son grab. calc., la mayoría son mapas, algunas son retratos y otras variadas; algunas van firmadas por el grabador, "Cardano" o "Selma", de ellas, seis son pleg. Están sin numerar las que serían n. 12-1
Predictions of strength in MEMS components with defects - a novel experimental-theoretical approach
No full textAn analysis of the membrane deflection experiment used in the investigation of mechanical properties of freestanding submicron thin films
No full textAbstractIn this paper we investigate, both experimentally and theoretically, the competition between different failure mechanisms (stretching, bending and curvature localization) in freestanding submicron thin films commonly used in micro-electromechanical systems. Microstructures made of elastic-brittle materials such as ultrananocrystalline diamond, diamond like carbon and silicon nitride, as well as elastic–plastic materials such as gold, aluminum, and copper, are tested by means of the membrane deflection experiment developed at Northwestern University. Evidence of competition between different failure modes has been found for the investigated elastic-brittle materials. The phenomenon is dependent on specimen size and shape. By contrast, in the case of elastic–plastic materials, failure due to stretching was found to be the dominant mechanism. An analytical model is proposed to rationalize the experimental data and to provide dimensionless parameters able to describe the competition between different failure mechanisms. These dimensionless parameters are particularly useful in the design of specimens employed in the MDE technique
Experiments and modeling of carbon nanotube-based NEMS devices
No full textIn this paper, carbon nanotube-based nanoelectromechanical systems (NEMS) are nanofabricated and tested. In-situ scanningelectron microscopy measurements of the deflection of the cantilever under electrostatic actuation are reported. In particular, a cantilever nanotube suspended over an electrode (nanoswitch), or two symmetric cantilever nanotubes (nanotweezers), from which a differential in electrical potential is imposed, are studied. The finite deformation regime investigated here is the first of its kind. An analytical model based on the energy method in both small deformation and finite kinematics (large deformation) regimes is used to interpret the measurements. The theory overcomes limitations of prior analysis reported in the literature towards the prediction of the structural behavior of NEMS. Some of the simplifyinghypotheses have been removed. Furthermore, the theory takes into account the cylindrical shape of the deflected nanotube in the evaluation of its electrical capacitance, the influence of the van der Waals forces as well as finite kinematics. In addition, tip charge concentration and a quantum correction of the electrical capacitance are also considered. The energy-based method is used to predict the structural behavior and instability of the nanotube, correspondingto the on/off states of the nanoswitch, or to the open/close states of the nanotweezers—at the so-called pull-in voltage. Accuracy of the derived formulas is assessed by comparison of the theoretical prediction and experimental data in both small deformation and finite kinematics regimes. The results reported in this work are particularly useful in the characterization of the electromechanical properties of nanotubes as well as in the optimal design of nanotube-based NEMS devices
Noticia de los caudales, frutos, y efectos, que han entrado en España de la América en el feliz reynado de nuestro católico Monarca Don Carlos III (que Dios guarde)
No full textSign.: A-G\p8\s, H\p5\
Numerical analysis of nanotubes based NEMS devices - Part II: Role of finite kinematics, stretching and charge concentrations
No full textMatilde Espinosa o la Metáfora de la Poesía
No full textThe work written by the Colombian poet Matilde Espinosa de Pérez de serves to be
known and recognized by the literary review, so according to this, the article below is a study
about two of her last works: The dark land and The town gets into dark. This paper analyses the
poetic conception of the female author, the a esthetic connection of her work with her passing
within everyday life as a mother, woman and female writer and, the standing she considers
among pain, life and death as elements that constitutes her poetic ar
Review of The Most Controversial Decision: Truman, the Atomic Bombs, and the Defeat of Japan and Hiroshima: Why America Dropped the Atomic Bomb
No full textAbout the author
Alicia Espinosa is a junior at Boston University. She will be graduating in May 2018 with a Bachelor of Arts in History and minors in Anthropology and Public Health
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