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ANALYSIS OF HYBRID PEROVSKITE FILMS (MAPbI3) FABRICATED BY THE ONE AND TWO-STEPS METHODS

Diana Marcela Montoya (2021)

"In this work, the one-step and the two-step methods were used to deposit MAPbI3 perovskite films. For both methods, there are several variables to control the perovskite formation and film quality. The influence of anti-solvent, the time for its addition, and the annealing temperature on the features of perovskite films were studied for the one-step method. The temperature for deposition of the inorganic film was studied for the close-spaced sublimation method, and the time that MAI-solution remains onto the PbI2 film before the spin process began was studied for spin-coating with sequential deposition methods."

Doctoral thesis

Perovskite Solar cells MAPbI3 CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA FÍSICA ÓPTICA ÓPTICA

Magnitude and Epicenter Estimations of Mexican Earthquakes form Isoseismic Maps

Shri Krishna Singh (1980)

Relationships between magnitude, M, and areas, Ai, of modified intensity contours IV, V and VI of the form M = λi log Ai + µi are derived from Mexican earthquakes. Due to insufficient data, λi has been fixed to 1. Events have been grouped broadly as interplate and intraplate events. Within the range of their validity (7.0≤ M ≤8.2 for interplate; 6.4 ≤ M ≤ 7.1 for intraplate) the relations would give estimate of M to within ± 0.3 to ± 0.4 unit ( one standard deviation) of magnitude. The attenuation of intensity for interplate earthquakes is higher than that for intraplate earthquakes. The attenuation for interplate earthquakes is comparable to or greater than for Southern California earthquakes. Epicenters estimated at the center of maximum intensity contours differ from instrumental epicenter bye 48 ± 22 km.

Article

Magnitude Epicenter Mexican Earthquakes Isoseismic Maps Magnitude Epicenter Mexican Earthquakes Isoseismic Maps concept8601 Seismology CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA CIENCIAS DE LA TIERRA Y DEL ESPACIO GEOFÍSICA SISMOLOGÍA Y PROSPECCIÓN SÍSMICA

La percepción de la violencia en la ciudad de Acapulco. Una mirada de los estudiantes de la Escuela Superior de Psicología de la Universidad Autónoma de Guerrero

YURIDIA LOZANO PEÑALOZA NEFTALI GARCIA CASTRO (2020)

The city of Acapulco is considered the second most violent in the world; only surpassed by Tijuana, Baja California, since, in recent years, very high homicide rates have been recorded as a result of the organized crime that operates in this Guerrero city. The phenomenon of violence has permeated in most of the spaces of the inhabitants of the city, despite the different strategies undertaken by the federal, state and local government that seek to address this social problem; it has reached levels that are unprecedented in national history and has disrupted the daily life of the Acapulqueña population, which suffers diverse psychosocial effects; among those who emphasize anxiety, stress and fear. The purpose of this investigation was to identify how violence occurs in the city of Acapulco, Guerrero

Book part

social mapping perception workshop violence cartografía social percepción violencia CIENCIAS SOCIALES GEOGRAFÍA GEOGRAFÍA ECONÓMICA