The Stellar Content of Obscured Galactic Giant HII Regions. VI: W51A

We present K-band spectra of newly born OB stars in the obscured Galactic giant H II region W51A and ~ 0.8'' angular resolution images in the J, H and K_S-bands. Four objects have been spectroscopically classified as O-type stars. The mean spectroscopic parallax of the four stars gives a distance of 2.0 \pm 0.3 kpc (error in the mean), significantly smaller than the radio recombination line kinematic value of 5.5 kpc or the values derived from maser propermotion observations (6--8 kpc). The number of Lyman continuum photons from the contribution of all massive stars (NLyc ~ 1.5 x 10^{50} s^{-1}) is in good agreement with that inferred from radio recombination lines (NLyc = 1.3 x 10^{50} s^{-1}) after accounting for the smaller distance derived here. We present analysis of archival high angular resolution images (NAOS CONICA at VLT and T-ReCS at Gemini) of the compact region W51 IRS2. The K_S--band images resolve the infrared source IRS~2 indicating that it is a very young compact HII region. Sources IRS2E was resolved into compact cluster (within 660 AU of projected distance) of 3 objects, but one of them is just bright extended emission. W51d1 and W51d2 were identified with compact clusters of 3 objects (maybe 4 in the case of W51d1) each one. Although IRS~2E is the brightest source in the K-band and at 12.6 \micron, it is not clearly associated with a radio continuum source. Our spectrum of IRS~2E shows, similar to previous work, strong emission in Br$\gamma$ and HeI, as well as three forbidden emission lines of FeIII and emission lines of molecular hydrogen (H_2) marking it as a massive young stellar object.Comment: 31 pages and 9 figures, submitted to A

Biologia de Doru luteipes (Scudder) e sua capacidade predatória de ovos de Helicoverpa zea (Boddie).

O objetivo deste trabalho foi estudar a biologia e o potencial de Doru luteipes (Scudder) em laboratorio, como predador de ovos de Helicoverpa zea (Boddie), Ninfas de um dia de idade e adultos foram individualizados em placas de Petri, receberam como alimento, ovos de H. zea. O periodo de incubacao foi, em media, 7,6 dias. O periodo ninfal (quatro instares) foi de 34,4 dias. O ciclo do inseto foi, em media, 217,9 dias. O periodo pre-reprodutivo foi, em media, 30,7 dias, sendo que as femeas ovipositaram mais de uma vez, mesmo quando nao fecundadas. O numero de ovos por postura foi de 15,9, com a viabilidade chegando a 85,2%. A longevidade media do adulto, foi de 175,9 dias. Em media uma ninfa consumiu 23,7 ovos de H. zea por dia, num total de 812,9 ovos durante esta fase. Ja o adulto do predador consumiu 7457,4 ovos, com media diaria de 42,1 ovos. No geral, um predador se alimentou durante sua vida, de aproximadamente 8276 ovos de H. zea (39 ovos/dia)

Do slower life history strategies reduce sociodemographic sex differences?

This study examines the relations between sociodemographic sex differences and life history strategies in the populations of Mexican States. Sex differences in anatomy and behavior was measured with traits such as educational achievement, mortality, and morbidity. The data were obtained from the Instituto Nacional de Estadística y Geografía (INEGI) and sampled from thirty-one Mexican states and the Federal District (N = 32). An extension analysis was performed selecting only the sex ratio variables that had a correlation with the slow Life History factor greater than or equal to an absolute value of .25. A unit-weighted sex ratio factor was created using these variables. Across 32 Mexican states, the correlation between latent slow life history and sex ratio was .57 (p .05). These results are consistent with our hypothesis that slower life histories favor reduced sexual dimorphism in physiology and behavior among human subnational populations. The results of the study further understanding of variations in population sex differences, male-biased behaviors toward sexual equality, and the differences among subnational (regional) populations within the United States of Mexico.   DOI:10.2458/azu_jmmss_v6i1_chavarria_miner

Editorial de cierre de año 2021,Vol.18

En medio de pandemia de la Covid 19 que nos golpea a nivel internacional, realizamos la publicación de la presente editorial del año 2021, felicitando a todos los educadores por su día. El colectivo de Olimpia ha continuado trabajando para elevar la calidad de sus publicaciones, en la modalidad de Teletrabajo, lo que ha permitido obtener logros en materia de indexación en prestigiosas bases de datos internaciones al incorporarse a CLASE, PERIODICA BIBLIT, IIJIF, además en este momento se está postulando para el Catálogo 2.0 de Latindex y para Redalyc, todo ello contribuye de manera significativa a elevar la visibilidad internacional. La Revista Olimpia cierra el volumen 18 del 2021, este año bajo el sistema de publicación continua con un total de 122 artículos, de ellos 89 son originales, y 33 de revisión, artículos de extranjeros 21, destacándose autores de países como Ecuador, Angola, Venezuela, Chile, y México. En el ámbito nacional contamos con las contribuciones de varias universidades del país por citar algunos ejemplos las universidades de: Holguín, Santiago de Cuba, Guantánamo, Cienfuegos, las Villas, Matanzas, la Habana, matanzas Sancti Spiritus y Ciego de Ávila. En este volumen podrá encontrar, artículos relacionados con Psicología del Deporte, Entrenamiento Deportivo, Medicina Deportiva, Educación Física y Rehabilitación Física. Con esta entrega la Revista pone a la disposición de los profesionales de la educación aportes científicos que sin lugar a dudas contribuyen al perfeccionamiento de los procesos educativos en los diferentes escenarios educativos y deportivos. El equipo Editorial de Olimpia desea muchas felicidades a todos los educadores de Cuba y el mundo por la jornada del educador, navidades y fin de año.   Dr. C Lexy Figueredo Frutos Editor Principal Revista científica Olimpi