Espectroscopía Atómica y Tecnologías Cuánticas

Los átomos presentan una estructura electrónica “sencilla”, lo que los convierte en excelentes candidatos para la manipulación con luz de sistemas cuánticos. Sin embargo, el movimiento de los átomos (ensanchamiento Doppler) limita la capacidad de manipulación de los estados cuánticos. Se han desarrollado dos alternativas que permiten disminuir estos efectos. La primera comprende una serie de espectroscopias libres de Doppler en muestras gaseosas. La segunda es el enfriamiento y el confinamiento de átomos. En esta charla se presentarán algunos ejemplos de espectroscopias de precisión en átomos de rubidio. Se enfatiza la espectroscopia de selección de velocidades que nos ha permitido observar una transición prohibida por la aproximación dipolar eléctrica en un vapor de rubidio atómico a temperatura ambiente. También se discutirá la manera en la que los átomos fríos son utilizados como sensores cuánticos, utilizando como ejemplo un gravímetro que estamos construyendo y que permitirá la medición de la aceleración local de gravedad con ocho cifras decimales.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Estudio palinológico del yacimiento arqueológico de Matarrubilla, Valencina de la Concepción (Sevilla)

XV lnternational A.P.L.E. Symposium of Palynolog

Sermon de la constitucion : predicado en la solemne funcion en que ratificaron el juramento de ella todos los individuos de la comunidad de RR. PP. Minimos del convento de nuestra señora de la Victoria de Malaga : el dia 8 de mayo de 1820

Ejemp. sin cub.Copia digital. realizada por la Biblioteca de Andalucí

Silage for Cattle Feeding in Venezuela

Silage is the most economical food to guarantee animal feeding throughout the whole year. Lack of information, economic resources, and farming equipment restrain many farmers from applying this agro technology. Based on these reasons, the present research examines the current trends in animal food conservation in Venezuela. So far, si- lage is manufactured out of entire maize plants and silos store harvested pastures, forage grass independently culti- vated, and forage-legume mixture. The last feeding variant is highly profitable due to its excellent productive results and low costs. Nutrient contents in maize silage are dry matter (28 %-35 %) and raw protein (8.3 %-15.2 %). Ru- minal degradability levels range between 76 % and 82 % due to legume content and urea supplementation  to the bulk. These findings  are consistent  with average  milk production  over 3 kg/cow/day  and milk products  sales. It should be noted that the best silage for cattle feeding consists of a grass-legume mixture in which legume content is not above 30 %

Are short-term variations in solar oscillation frequencies the signature of a second solar dynamo?

In addition to the well-known 11-year solar cycle, the Sun's magnetic activity also shows significant variation on shorter time scales, e.g. between one and two years. We observe a quasi-biennial (2-year) signal in the solar p-mode oscillation frequencies, which are sensitive probes of the solar interior. The signal is visible in Sun-as-a-star data observed by different instruments and here we describe the results obtained using BiSON, GOLF, and VIRGO data. Our results imply that the 2-year signal is susceptible to the influence of the main 11-year solar cycle. However, the source of the signal appears to be separate from that of the 11-year cycle. We speculate as to whether it might be the signature of a second dynamo, located in the region of near-surface rotational shear.Comment: 6 pages, 2 figures, proceedings for SOHO-24/GONG 2010 conference, to be published in JPC

Ongoing star formation in the protocluster IRAS 22134+5834

Aims. Massive stars form in clusters, and their influence on nearby starless cores is still poorly understood. The protocluster associated with IRAS 22134+5834 represents an excellent laboratory for studying the influence of massive YSOs on nearby starless cores and the possible implications in the clustered star formation process. Methods. IRAS 22134+5834 was observed in the cm range with (E)VLA, 3 mm with CARMA, 2 mm with PdBI, and 1.3 mm with SMA, to study both the continuum emission and the molecular lines that trace different physical conditions of the gas. Results. The multiwavelength centimeter continuum observations revealed two radio sources within the cluster, VLA1 and VLA2. VLA1 is considered to be an optically thin UCHii region with a size of 0.01 pc that sits at the edge of the near infrared (NIR) cluster. The flux of ionizing photons of the VLA1 corresponds to a B1 ZAMS star. VLA2 is associated with an infrared point source and has a negative spectral index. We resolved six millimeter continuum cores at 2 mm, MM2 is associated with the UCHii region VLA1, and other dense cores are distributed around the UCHii region. Two high-mass starless clumps (HMSC), HMSC-E (east) and HMSC-W (west), are detected around the NIR cluster with NH(1-0) and NH emission, and they show different physical and chemical properties. Two ND cores are detected on an NH filament close to the UCHii region with a projected separation of ~8000 AU at the assumed distance of 2.6 kpc. The kinematic properties of the molecular line emission confirm that the UCHii region is expanding and that the molecular cloud around the NIR cluster is also expanding. Conclusions. Our multiwavelength study has revealed different generations of star formation in IRAS 22134+5834. The formed intermediate-to-massive stars show a strong impact on nearby starless clumps. We propose that the starless clumps and HMPOs formed at the edge of the cluster while the stellar wind from the UCHii region and the NIR cluster drives the large scale bubble. © 2016 ESO.The work is supported by the STARFORM Sinergia Project CRSII2_141880 funded by the Swiss National Science Foundation. Y.W. also acknowledges support by the NSFC 11303097 and 11203081, China. A.S.-M. acknowledges support by the collaborative research center project SFB 956, funded by the Deutsche Forschungsgemeinschaft (DFG). G.B. is supported by the Spanish MICINN grant AYA2011-30228-C03-01 (cofunded with FEDER funds). A.P. acknowledges financial support from a UNAM-DGAPA-PAPIIT IA102815 grant, Mexico.Peer Reviewe