12,279 research outputs found
Finding evolved stars in the inner Galactic disk with Gaia
The Bulge Asymmetries and Dynamical Evolution (BAaDE) survey will provide
positions and line-of-sight velocities of ~20,000 evolved, maser bearing stars
in the Galactic plane. Although this Galactic region is affected by optical
extinction, BAaDE targets may have Gaia cross-matches, eventually providing
additional stellar information. In an initial attempt to cross-match BAaDE
targets with Gaia, we have found more than 5,000 candidates. Of these, we may
expect half to show SiO emission, which will allow us to obtain velocity
information. The cross-match is being refined to avoid false positives using
different criteria based on distance analysis, flux variability, and color
assessment in the mid- and near-IR. Once the cross-matches can be confirmed, we
will have a unique sample to characterize the stellar population of evolved
stars in the Galactic bulge, which can be considered fossils of the Milky Way
formation.Comment: To appear in the Proceedings of the IAU Symposium No. 330:
"Astrometry and Astrophysics in the Gaia sky
Astrometric Galactic maser measurements cross-matched with Gaia
Using the VLBA, the BeSSeL survey has provided distances and proper motions
of young massive stars, allowing an accurate measure of the Galactic spiral
structure. By the same technique, we are planning to map the inner Galaxy using
positions and velocities of evolved stars (provided by the BAaDE survey). These
radio astrometric measurements (BeSSeL and BAaDE) will be complementary to Gaia
results and the overlap will provide important clues on the intrinsic
properties and population distribution of the stars in the bulge.Comment: To appear in the Proceedings of the IAU Symposium No. 334:
"Rediscovering our Galaxy
Maser, infrared and optical emission for late-type stars in the Galactic plane
Radio astrometric campaigns using VLBI have provided distances and proper
motions for masers associated with young massive stars (BeSSeL survey). The
ongoing BAaDE project plans to obtain astrometric information of SiO maser
stars located in the inner Galaxy. These stars are associated with evolved,
mass-losing stars. By overlapping optical (Gaia), infrared (2MASS, MSX and
WISE) and radio (BAaDE) sources, we expect to obtain important clues on the
intrinsic properties and population distribution of late-type stars. Moreover,
a comparison of the Galactic parameters obtained with Gaia and VLBI can be done
using radio observations on different targets: young massive stars (BeSSeL) and
evolved stars (BAaDE).Comment: To appear in the Proceedings of the IAU Symposium No. 336:
Astrophysical Masers: Unlocking the Mysteries of the Univers
Actividades de la Cátedra empresa ANEFA de la E.T.S. de Ingenieros de Minas de Madrid
La Cátedra ANEFA de Tecnología de Áridos, es una de las Cátedras Universidad-Empresa de la E.T.S de Ingenieros de Minas de la Universidad Politécnica de Madrid (UPM). Fue creada hace diez años y está patrocinada por ANEFA (Asociación Nacional de Empresarios Fabricantes de Áridos). Desde su creación se han realizado numerosas actividades, fundamentalmente de formación en materias del sector de los áridos, tanto a los alumnos de los últimos cursos de la Escuela de Minas, como a alumnos de postgrado que quieran una actualización de conocimientos, incorporando los últimos avances tecnológicos. Esta última formación se realiza de forma semipresencial, empleando una plataforma de Internet de la UPM para seguimiento de la enseñanza no presencial. También se han realizado cursos y jornadas de uno o dos días de duración, en temáticas de actualidad e interés para los profesionales y empresarios del sector. Así como impartición de conferencias en diferentes foros universitarios, profesionales o escolares. Otra actividad importante es el fomento y apoyo a la investigación dentro del sector de los árido
Laparoscopic appendectomy in a second trimester pregnant patient due to acute appendicitis: a case report
Acute appendicitis is the most frequent surgical procedure of general surgery during pregnancy, which occurs in 0.04 to 0.2% of all pregnancies; this represents 25% of non-obstetric operations performed during pregnancy. A 33-year-old female patient with a second-trimester pregnancy, which goes to the Emergency Department for abdominal pain, when performing the anamnesis and physical examination, the suggestive picture of acute appendicitis is integrated, for which additional laboratory and cabinet studies are carried out, according to the clinical suspicion it is decided to perform diagnostic laparoscopy and management according to findings; cecal erythematosus appendix is evident, so appendectomy is performed, finding proximal appendicolitis. Later with good evolution and satisfactory exit for the binomial. This procedure has been associated with shorter surgery times, shorter hospital stays and fewer complications compared to open surgery
La frontera hispano-francesa : ensayo para su rectificación
Copia digital. España : Ministerio de Cultura y Deporte. Subdirección General de Coordinación bibliotecaria, 201
Sermó que en la solemne festa que fan en la esglesia parroquial de S. Esteve ... de Valencia ... els ... notaris administradors de la pila aon fonch batetjat S. Vicent Ferrer pera celebrar ... seu bateig y naiximent
Notas: pp. 25-39Sign.: [1]-5(4)Texto en valenciano y notas en castellan
New Superhard Phases for 3D C60-based Fullerites
We have explored new possible phases of 3D C60-based fullerites using
semiempirical potentials and ab-initio density functional methods. We have
found three closely related structures - two body centered orthorhombic and one
body centered cubic - having 52, 56 and 60 tetracoordinated atoms per molecule.
These 3D polymers result in semiconductors with bulk moduli near 300 GPa, and
shear moduli around 240 GPa, which make them good candidates for new low
density superhard materials.Comment: To be published in Physical Review Letter
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