MarioĪgave turneri, a new species of Agave from the Sierras Cucapá and El Mayor in northeastern Baja California, Mexico, is a medium-sized species that does not produce offsets, has a relatively short and narrow panicle, and has a distinctive flower structure. The method outlined for the development of research and the application of the "Opinions Questionnaire on Science, Technology and Society"…Īgave turneri (Agavaceae), a new species from northeastern Baja California, Mexico Oliveros Ruiz, Maria Amparo Sevilla Garcia, Juan Jose Schorr, MichaelĪ proposal is presented for the incorporation of the concepts of STS into the teaching of science and technology at the Faculty of Engineering, Mexicali Campus, of the University of Baja California. In the study population, exposure to a rural environment in early childhood decreased the risk of developing allergic rhinitis, regardless of a family history of asthma.Ī Study on the Attitudes and Opinions of Engineering Students from the University of Baja California, Mexico, on Science, Technology, and SocietyĮRIC Educational Resources Information Center The boys and girls who had ever lived on a farm or in a rural area had a lower probability, adjusted for confounding variables, of presenting nasal symptoms (OR=0.43 95%CI: 0.24-0.77), or nasal and ocular symptoms (OR=0.39 95%CI: 0.16-0.93). The general prevalence of nasal symptoms and nasal and ocular symptoms was 25.0% and 10.5%, respectively. The study took place in February-July 2004 and followed the methodology of the International Study of Asthma and Allergies in Childhood (ISAAC). The study analyzed associations between exposure variables and personal and family health history, and two dependent variables-nasal symptoms and nasal and ocular symptoms, in the absence of a cold or flu-using odd ratios (OR) and 95% Confidence Intervals (95%CI). A population-based, cross-sectional study using a standardized questionnaire administered to a random sample of 2087 schoolchildren 6-7 years of age (1078 girls and 1009 boys) living in the city of Mexicali, Baja California, Mexico. To assess the prevalence of allergic rhinitis symptoms among schoolchildren in Mexicali, Baja California, Mexico, and determine what impact a rural environment might have on this condition. īäcker, Claudia Barraza-Villarreal, Albino Moreno-MacÃas, Hortensia Escamilla-Núñez, Consuelo Romieu, Isabelle On the eastern side of the El Mayor Mountain we The preliminary interpretation using the "reverse shot" indicates a crust of 15 km depth beneath the Mexicali Valley and 19 km under the El Mayor Mountain and Laguna Salada basin. Velocities of our model for the region under study are about 1 km/s higher than the model proposed by McMechan and Mooney (1984) for the Imperial Valley. We propose an average-three-layer velocity structure model: 2.9, 5.6 and 6.9 km/s, with thicknesses of 1.2, 4.4 and 9.6 km, respectively.
MARTA ORTEGA MEXICALI BC SOFTWARE
Method based on asymptotic ray theory programed in the RAYINVR software (Zelt and Smith, 1992). From the first arrivals of refractions and reflections of the P wave we performed direct modeling of travel times and relative amplitudes (normalized synthetic seismograms). The arrival Pn wave is observed at three stations located in Laguna Salada and Sierra Juarez. Record sections show seismograms with impulsive P arrivals for nearby stations. As a "reverse shot", for a 47 km section between SLRC and El Mayor Mountain, we used an aftershock M 3.4 of the 2010 M 7.2 El Mayor - Cucapah earthquake. The beginning of the profile is at San Luis Rio Colorado (SLRC), Sonora and its ending is at the middle of Sierra Juarez, Baja California.
Records gathered were used to estimate a crust velocity structure model for South Mexicali Valley. The stations, spaced 6 km along a refraction profile, recorded a blast performed in the southwest Arizona near the border with Sonora, Mexico.
We installed 16 three-component short period stations (2 Hz) and one broadband station (100 s - 50 Hz). Due to the lack of an appropriate crust model for South Mexicali Valley, a refraction study was conducted.
MARTA ORTEGA MEXICALI BC SERIES
The northern Baja California region consists of two subregions of different geological features: the Peninsular Ranges of Baja California, of granitic composition, and the Mexicali Valley region, characterized by a series of sedimentary basins: the Laguna Salada and the Mexicali Valley. A Crustal Velocity Model for South Mexicali Valley, Baja California, México.
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