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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…

Due to the effect of the ionosphere on the propagation of the electromagnetic waves transmitted by the GPS satellites, in 1575.42 and 1227.60 MHz, it is possible to obtain the total ionospheric electron content (TEC). We present the methodology used…

This study is an approach to the analysis of the female labor market and the ways in which women have joined it, pointing out some of the main features of the profile of Mexican female workers as regards their educational…

En este trabajo se presenta un detector centellador en el que se determina la posición del destello luminoso producido por el paso de partículas cargadas mediante la lógica Anger. El material sensible del detector es una placa centelladora (PILOT-U) de…

Survey of observational data on desert dust storms and physical properties of dust (whit emphasis on results from complex observational programs accomplished in the USSR) has been given. Satellite observations of dust storms and their consequences have been considered in…

Some consideration of the adequate production of solar radiation information useful for solar energy planners and designers are shown here. Techniques for estimation of solar radiation on horizontal and inclined surfaces are discussed and  methods of application for developing countries…

Possible effects of solar activity on the records of air surface temperature and rainfall in Central America are analysed. The correlation between the series of sunspot numbers, surface air temperature and precipitation, is poor. However an increasing tendency in the…

The crisis of the eighties in Mexico provided a conjuncture enabling various hypotheses regarding female employment in times of recession to be proved. The higher rates of growth of female employment in the formal sector the economy indicate that women…