14 research outputs found
Spectroscopic Transit Search: a self-calibrating method for detecting planets around bright stars
We search for transiting exoplanets around the star Pictoris using
high resolution spectroscopy and Doppler imaging that removes the need for
standard star observations. These data were obtained on the VLT with UVES
during the course of an observing campaign throughout 2017 that monitored the
Hill sphere transit of the exoplanet Pictoris b. We utilize line
profile tomography as a method for the discovery of transiting exoplanets. By
measuring the exoplanet distortion of the stellar line profile, we remove the
need for reference star measurements. We demonstrate the method with white
noise simulations, and then look at the case of Pictoris, which is a
Scuti pulsator. We describe a method to remove the stellar pulsations
and perform a search for any transiting exoplanets in the resultant data set.
We inject fake planet transits with varying orbital periods and planet radii
into the spectra and determine the recovery fraction. In the photon noise
limited case we can recover planets down to a Neptune radius with an 80%
success rate, using an 8 m telescope with a spectrograph and 20
minutes of observations per night. The pulsations of Pictoris limit our
sensitivity to Jupiter-sized planets, but a pulsation removal algorithm
improves this limit to Saturn-sized planets. We present two planet candidates,
but argue that their signals are most likely caused by other phenomena. We have
demonstrated a method for searching for transiting exoplanets that (i) does not
require ancillary calibration observations, (ii) can work on any star whose
rotational broadening can be resolved with a high spectral dispersion
spectrograph and (iii) provides the lowest limits so far on the radii of
transiting Jupiter-sized exoplanets around Pictoris with orbital
periods from 15 days to 200 days with >50% coverage.Comment: Accepted for publication in A&A, 8 pages, 8 figures. The Github
repository can be found at
https://github.com/lennartvansluijs/Spectroscopic-Transit-Searc
Creación de un programa motivacional para un buen afrontamiento de los cambios psicológicos en el adulto mayor enfocado al Grupo Hilos de Plata de la Parroquia Beata Madre Encarnación Rosal.
El ejercicio Profesional Supervisado, “Creación de un programa motivacional para un buen afrontamiento de los cambios psicológicos en el adulto mayor, enfocado al grupo “Hilos de Plata” de la parroquia Beata Madre Encarnación Rosal de Villa Hermosa I, San Miguel Petapa”, se realizó de marzo de 2012 a marzo 2013. Se desarrolló en tres subprogramas: servicio docencia e investigación. El subprograma de servicio: brindó terapia psicológica a una población de 60 personas, en su mayoría niños, adolescentes, adultos y adultos mayores. Orientó a los integrantes del grupo “Hilos de Plata” para desarrollar salud mental. Fortaleció al grupo para que siga funcionando como una red de apoyo. El subprograma de docencia: contribuyó al fortalecimiento de los cambios psicológicos del adulto mayor en el grupo “Hilos de Plata”, por medio de talleres interactivos. Logró fortalecer la red de “Hilos de Plata”. El subprograma de docencia: dirigió al grupo del adulto mayor “Hilos de Plata”, con la finalidad de contribuir a que los adultos mayores tengan una perspectiva adecuada para afrontar los diferentes cambios psicológicos que causa la etapa. Logró que los integrantes del grupo tuvieran la distensión y escape de las tensiones y que aprendieran técnicas encaminadas a lograr la estabilidad emocional. Desarrolló actividades educativas, recreativas y espirituales, con el apoyo de estudiantes de Trabajo social. El subprograma de investigación, se enfocó a explorar el contexto de las relaciones básicas de las personas que asisten al grupo del adulto mayor “Hilos de Plata” y la valoración que le dan a la participación dentro del grupo. Se aplicó una entrevista estructurada, se observación las actitudes, relatos y sentimientos que los integrantes del grupo mostraron en las reuniones. Los resultados obtenidos permitieron establecer que, la afectividad y las relaciones familiares que se les brinda o niega al adulto mayor son determinantes para que los adultos mayores enfrentar de una manera sana las dificultades que representa esta etapa de la vid
Introducing two improved methods for approximating radiative cooling in hydrodynamical simulations of accretion discs
The evolution of many astrophysical systems depends strongly on the balance between heating and cooling, in particular star formation in giant molecular clouds and the evolution of young protostellar systems. Protostellar discs are susceptible to the gravitational instability, which can play a key role in their evolution and in planet formation. The strength of the instability depends on the rate at which the system loses thermal energy. To study the evolution of these systems, we require radiative cooling approximations because full radiative transfer is generally too expensive to be coupled to hydrodynamical models. Here we present two new approximate methods for computing radiative cooling that make use of the polytropic cooling approximation. This approach invokes the assumption that each parcel of gas is located within a spherical pseudo-cloud which can then be used to approximate the optical depth. The first method combines the methods introduced by Stamatellos et al. and Lombardi et al. to overcome the limitations of each method at low and high optical depths respectively. The second, the "Modified Lombardi" method, is specifically tailored for self-gravitating discs. This modifies the scale height estimate from the method of Lombardi et al. using the analytical scale height for a self-gravitating disc. We show that the Modified Lombardi method provides an excellent approximation for the column density in a fragmenting disc, a regime in which the existing methods fail to recover the clumps and spiral structures. We therefore recommend this improved radiative cooling method for more realistic simulations of self-gravitating discs
Sequence variants affecting eosinophil numbers associate with asthma and myocardial infarction
To access publisher full text version of this article. Please click on the hyperlink in Additional Links fieldEosinophils are pleiotropic multifunctional leukocytes involved in initiation and propagation of inflammatory responses and thus have important roles in the pathogenesis of inflammatory diseases. Here we describe a genome-wide association scan for sequence variants affecting eosinophil counts in blood of 9,392 Icelanders. The most significant SNPs were studied further in 12,118 Europeans and 5,212 East Asians. SNPs at 2q12 (rs1420101), 2q13 (rs12619285), 3q21 (rs4857855), 5q31 (rs4143832) and 12q24 (rs3184504) reached genome-wide significance (P = 5.3 x 10(-14), 5.4 x 10(-10), 8.6 x 10(-17), 1.2 x 10(-10) and 6.5 x 10(-19), respectively). A SNP at IL1RL1 associated with asthma (P = 5.5 x 10(-12)) in a collection of ten different populations (7,996 cases and 44,890 controls). SNPs at WDR36, IL33 and MYB that showed suggestive association with eosinophil counts were also associated with atopic asthma (P = 4.2 x 10(-6), 2.2 x 10(-5) and 2.4 x 10(-4), respectively). We also found that a nonsynonymous SNP at 12q24, in SH2B3, associated significantly (P = 8.6 x 10(-8)) with myocardial infarction in six different populations (6,650 cases and 40,621 controls)
PHarmacist Avoidance or Reductions in Medical Costs in Patients Presenting the EMergency Department: PHARM-EM Study
Objectives:. To comprehensively classify interventions performed by emergency medicine clinical pharmacists and quantify cost avoidance generated through their accepted interventions.
Design:. A multicenter, prospective, observational study was performed between August 2018 and January 2019.
Setting:. Community and academic hospitals in the United States.
Participants:. Emergency medicine clinical pharmacists.
Interventions:. Recommendations classified into one of 38 intervention categories associated with cost avoidance.
Measurements and Main Results:. Eighty-eight emergency medicine pharmacists at 49 centers performed 13,984 interventions during 917 shifts that were accepted on 8,602 patients and generated 2,225,049 cost avoidance), resource utilization (628; 1,787,170), prophylaxis (24; 2,836,811), and administrative/supportive tasks (2,046; 538.61 per intervention, 8,213.59 per emergency medicine pharmacist shift. The annualized cost avoidance from an emergency medicine pharmacist was 1.4:1 and 1.4:1 and $10.6:1
Sequence variants affecting eosinophil numbers associate with asthma and myocardial infarction
Eosinophils are pleiotropic multifunctional leukocytes involved in initiation and propagation of inflammatory responses and thus have important roles in the pathogenesis of inflammatory diseases. Here we describe a genome-wide association scan for sequence variants affecting eosinophil counts in blood of 9,392 Icelanders. The most significant SNPs were studied further in 12,118 Europeans and 5,212 East Asians. SNPs at 2q12 (rs1420101), 2q13 (rs12619285), 3q21 (rs4857855), 5q31 (rs4143832) and 12q24 (rs3184504) reached genome-wide significance (P = 5.3 x 10(-14), 5.4 x 10(-10), 8.6 x 10(-17), 1.2 x 10(-10) and 6.5 x 10(-19), respectively). A SNP at IL1RL1 associated with asthma (P = 5.5 x 10(-12)) in a collection of ten different populations (7,996 cases and 44,890 controls). SNPs at WDR36, IL33 and MYB that showed suggestive association with eosinophil counts were also associated with atopic asthma (P = 4.2 x 10(-6), 2.2 x 10(-5) and 2.4 x 10(-4), respectively). We also found that a nonsynonymous SNP at 12q24, in SH2B3, associated significantly (P = 8.6 x 10(-8)) with myocardial infarction in six different populations (6,650 cases and 40,621 controls)
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