, El lenguaje es una de las áreas que se ven influidas debido al contacto cultural. Este artículo trata sobre la convivencia del porhé con el español desde sus primeros contactos y la influencia mutua de las dos lenguas, basándose…

Half-hourly estimates of solar radiation were obtained from satellite data for the Yaqui Valley in Sonora, Mexico for the period November 1998 to March 1999. Estimates were made on a 50 km grid using the Global Energy and Water-Cycle Experiment…

Geothermal Inflow Performance Relationships (GIPR) may be used to estimate formation permeability, by overlapping the well inflow curve with different theoretical GIPR curves. This method does not require field measurement of the well inflow curve. The complete well inflow curve…

The Suchilquitongo Formation of the northeastern Valley of Oaxaca is a thick sequence of thin-bedded tuffaceous sandstones and siltstones, which locally contain Hemingfordian mammal fauna, and interbedded lacustrine limestones and rhyolitic tuffs (Etla Ignimbrite). Three new K-Ar dates of biotite…

A comparison of performance of two versions of the Eta/CPTEC model is presented. The new version is an update of an earlier operational one and includes representation of soil and vegetation types. The soil/vegetation model contains two underground layers and…

El artículo trata los datos más sobresalientes y generales sobre la fonología del español hablado en la región central de la República Mexicana, comparada con otras variantes regionales de la misma lengua; sin contar con las variaciones en otros continentes…

We derive a P-wave 1D-velocity model for Costa Rica that may serve for routine high-precision earthquake location and as initial reference model for 3D seismic tomography. The velocity inversions are performed using 822 well-locatable events together with 14774 P-wave observations…

Concentration data for major and trace elements were examined in two international geochemical reference materials, basaltBIR-1 from the United States Geological Survey (USGS) and peridotite JP-1 from the Geological Survey of Japan (GSJ). Afteroutlier rejection (based on fourteen different statistical…

The barometric effect for the Mexico City neutron monitor is obtained from cosmic ray intensity data obtained during the years 1990-1997, more than half a solar cycle, by correlation between the neutron intensity and the atmospheric pressure. In order to…

Total solar irradiance (TSI) may present the same long-term variation as the solar cycle length (SCL), corresponding to the Gleissberg cycle. It is expected that when SCL decrease, TSI increase. The analysis of stratospheric, ionospheric and solar data suggesting that…