Repositorio IPICyT: Envíos recientes
Mostrando ítems 1621-1640 de 2293
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Southward migration of magmatic activity in the Colima volcanic complex, Mexico: an ongoing process
(2015)"The Colima Volcanic Complex trends in a nearly N-S direction in western Mexico, and one of its structures, Colima volcano, is the most historically active volcano in the country. Immediately to the N, there is another ... -
Estimation of total yearly CO2 emissions by wildfires in Mexico during the period 1999–2010
(Hindawi, 2014)"The phenomenon of wildfires became a global environmental problem which demands estimations of their CO2 emissions. Wildfires have deteriorated the air quality increasingly. Using available information on documented ... -
Groundwater flow processes and mixing in active volcanic systems: the case of Guadalajara (Mexico)
(2015)"Groundwater chemistry and isotopic data from 40 production wells in the Atemajac and Toluquilla valleys, located in and around the Guadalajara metropolitan area, were determined to develop a conceptual model of groundwater ... -
Is there a grenvillian basement in the Guerrero-Morelos platform of Mexico?
(2007)"In the Guerrero-Morelos platform (Guerrero State, Mexico) the adakitic rocks of Early Tertiary age contain abundant hornblende-rich tonalite xenoliths. Zircon crystals have been concentrated from both adakites and xenoliths, ... -
Paleomagnetic pole positions and geomagnetic secular variation from the Cretaceous Ponta Grossa dike swarm (Brazil)
(2015)"A detailed paleomagnetic and rock magnetic investigation has been carried out on the Early Cretaceous Ponta Grossa dike swarm in southern Brazil. This formation seems an excellent target for paleomagnetic study. The dikes ... -
2 ¾ dimension modeling of the aeromagnetic anomaly of Volcán de Colima, western Mexico
(2012)"Se presentan los resultados de un modelo 2 ¾ D de la anomalía aeromagnética del Volcán de Colima ubicado en la porción sur del Complejo Volcánico de Colima. El modelo estructural documenta la presencia de una cámara ... -
A new theory on tidal currents rotation
(2007-01)"Applying the linearized equations of motion, projection on the complex plane and a representation of the velocity vector and the forcing sea surface elevation gradient in function of the eigenvectors of the homogeneous ... -
Bottom topography, recent sedimentation and water volume of the Cerro Prieto Dam, NE Mexico
(2014)"The Cerro Prieto dam, a relatively small water reservoir in NE Mexico, is one of the main resources of potable water for Monterrey, a city with a population of about four million inhabitants. A high resolution seismic ... -
A review of iron oxide transformations, rock magnetism and interpretation of magnetic anomalies: el Morro Mine (Brazil), a case study
(2011)"Se presenta una revisión de la mineralogía de los óxidos de hierro y su relación con las propiedades magnéticas. Se discuten los procesos magnéticos y modelos de una gran área alrededor de la mina El Morro, Brasil en el ... -
Lithostratigraphic analysis and geochemistry of a vitric spatter-bearing ignimbrite: the Quaternary Adeje Formation, Cañadas volcano, Tenerife
(2013-06)"The 1.5-Ma Adeje Formation in SW Tenerife contains an ignimbrite sheet with remarkable textural and chemical complexity. A basal Plinian pumice-fall layer is overlain by a partly welded compound ignimbrite in which ... -
Identification of diagenetic calcium arsenates using synchrotron-based micro X-ray diffraction
(2015)"In this work, we identify the type of calcium arsenates found in sediment samples from an aquifer located in Matehuala, San Luis Potosí, México. Sediments in contact with levels up to 158 mg/L of arsenic in neutral pH ... -
Caracterización hidrogeoquímica y vulnerabilidad del acuífero Huichapan-Tecozautla, Estado de Hidalgo
(2017-01)"El acuífero Huichapan Tecozautla se encuentra ubicado en los municipios del mismo nombre en el Estado de Hidalgo. La problemática que se tiene es el abastecimiento de agua, debido a que se ha acentuado la escasez en las ... -
Índice de pobreza del agua en los acuíferos de Cerritos-Vila Juárez y Rioverde de la zona media de San Luis Potosí
(2017-01)"En la actualidad la deficiente gestión de los recursos hídricos, el crecimiento de la población y una falta cultura en aprovechamiento de los recursos naturales, ha incrementado la sobreexplotación de los acuíferos en ... -
Electromagnetic transmittance in alternating material-metamaterial layered structures
(2017)"Using the transfer matrix method we examine the parametric behavior of the transmittance of TE and TM electromagnetic plane waves propagating in frequency range which are far from the absorption bands of a periodic ... -
One-parameter isospectral special functions
(2003)"Using a combination of the ladder operators of Pina [1] and the Pammetric operators of Mielnik [2] we introduce second order linear differential equations whose eigenfunctions are isospectral to the special functions of ... -
Riccati nonhermiticity with application to the Morse potential
(2005)"A supersymmetric one-dimensional matrix procedure, similar to the relationships of the same type between Dirac and Schrodinger equations in particle physics, is described in the general terms. By this means, we are able ... -
Extension of a factorization method of nonlinear second order ODE´s with variable coefficients
(2017)"The factorization of nonlinear second-order differential equations proposed by Rosu and Cornejo-Pérez in 2005 is extended to equations containing quadratic and cubic forms in the first derivative. A few illustrative ... -
Traveling kinks in cubic nonlinear Ginzburg-Landau equations
(2012)"Nonlinear cubic Euler-Lagrange equations of motion in the traveling variable are usually derived from Ginzburg-Landau free energy functionals frequently encountered in several fields of physics. Many authors considered ... -
Nonlinear second order Ode's: factorizations and particular solutions
(2005)"We present particular solutions for the following important nonlinear second order differential equations: modified Emden, generalized Lienard, convective Fisher, and generalized Burgers-Huxley. For the latter two equations ... -
Ramanujan sums for signal processing of low-frequency noise
(2002)"An aperiodic (low-frequency) spectrum may originate from the error term in the mean value of an arithmetical function such as Mobius function or Mangoldt function, which are coding sequences for prime numbers. In the ...