Extra-tidal structures around the Gaia Sausage candidate globular cluster NGC 6779 (M56)

We present results on the stellar density radial profile of the outer regions of NGC6779, a Milky Way globular cluster recently proposed as a candidate member of the Gaia Sausage structure, a merger remnant of a massive dwarf galaxy with the Milky Way.Taking advantage of the Pan-STARRS PS1 public astrometric and photometric catalogue,we built the radial profile for the outermost cluster regions using horizontal branch and main sequence stars, separately,  in order to probe for different profile trends because of difference stellar masses. Owing to its relatively close location to the Galactic plane, we have carefully treatedthe chosen colour-magnitude regions properly correcting them by the amount ofinterstellar extinction measured along the line-of-side of each star, as well as cleaned themfrom the variable field star contamination observed across the cluster field.  In the region spanning from the tidal to the Jacobi radii the resulting radial profiles show a diffuseextended halo, with an average power law slope of -1. While analysingthe relationships between the Galactocentric distance, the half-mass density, the half-lightradius, the slope of the radial profile of the outermost regions, the internal dynamical evolutionarystage, among others, we found that NGC6779 shows structural properties similar to those of the remaining  Gaia  Sausage candidate globular clusters, namely, they are massive clusters  (>10^5Mo) in a moderately early dynamical evolutionary stage, with  observed extra-tidal structures.Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cuyo; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: Carballo-Bello, Julio A.. Universidad Católica de Chile; Chil

A therapeutic exercise program improves pain and physical dimension of health-related quality of life in young adults: a randomized controlled trial

Original Research[Abstract] Objective. The aim of this study was to evaluate the effects of an exercise therapy program on pain and physical dimension of health-related quality of life for young adults with musculoskeletal pain. Design. This is a randomized controlled single-blind trial. Fifty-seven subjects (58% women) were randomly assigned to experimental [n = 28, 21.4 (2.9) yrs] and control [n = 29, 21.0 (4.2) yrs] groups. The experimental group participated in a 9-wk stabilization exercise therapy program, 60 mins/wk, whereas the control group did not exercise, with a preintervention and postintervention assessment. Primary outcome was Physical Component Summary of SF-36. Secondary outcomes were Nordic Musculoskeletal Questionnaire, Visual Analogue Scale, Oswestry Disability Index, Neck Disability Index, and Trunk Flexor Endurance Test. The Shapiro-Wilk, independent t test or Mann-Whitney U test, X2, or Fisher's exact test were used for statistical analysis. Results. After intervention, the experimental group improved by 3.2 (4.5) points on the Physical Component Summary (P = 0.01), decreased prevalence of low back pain in the last month (P = 0.02) and cervical disability (P = 0.02), and increased flexor trunk endurance (P = 0.005). Conclusions. This study confirmed that a 9-wk progressive exercise therapy program can improve physical health and reduce the prevalence of cervical disability and low back pain in the last month in young adults with musculoskeletal pain. Musculoskeletal pain (MSP) is a significant health problem in society and has been shown to have a major impact on health-related quality of life, for both physical and mental health (MH),1–3 and this may be even more relevant in a young population. Most people who experience this type of pain go on to have recurrent episodes.3 The prevalence of MSP in younger people, such as university students, has increased significantly in the last decade because of different factors such as sedentary lifestyle with increased use of computers, low physical activity levels, poor sleeping habits, or psychosocial factors.4 The most common locations with symptoms include neck and shoulder regions, lumbar region, and simultaneously in multiple other regions.4 They may have a number of negative effects, including more generalized and chronic pain.1,2 Considering the increasingly higher prevalence of MSP in young adults and the predictive value that this pain has on suffering MSP as an adult, it seems appropriate to focus greater attention on early prevention at a young age. Exercise therapy has been investigated extensively, and there is evidence that it is effective for the prevention and treatment of low back and cervical pain.5,6 Although there is limited evidence regarding the specific content of exercises, their intensity, as well as the number, duration, and frequency of sessions; the accumulated evidence5–9 on the topic provides the best indications for which and how therapeutic exercises should be used. In the case of subjects with lower back pain (LBP), the most recommended exercises consist of coordination, relaxation, and resistance of the trunk muscles,7 as well as motor control or dynamic stabilization exercises and integrated activation of the global muscles.9 In turn, in subjects with neck pain, the recommended methods involve strengthening, resistance, stretching, and stabilization exercises.6,8 Despite the available evidence regarding the effects of exercise therapy on the prevention of MSP, we have found hardly any studies that apply this to young adults.10 However, we consider that more attention should be paid to this collective because of their imminent incorporation in the labor market, and the socio-economic consequences these symptoms may have for these future workers and their employers. Taking into consideration the increase in MSP in younger persons, the evidence supporting exercise therapy for its prevention in adults, and at the same time the lack of consensus regarding the specific characteristics of the intervention program, this study aims to evaluate the effect of a progressive, multimodal therapeutic exercise program on pain, physical health, disability, and trunk flexor muscle endurance in a group of young university adults

A Megacam Survey of Outer Halo Satellites. IV. Two foreground populations possibly associated with the Monoceros substructure in the direction of NGC2419 and Koposov2

The origin of the Galactic halo stellar structure known as the Monoceros ring is still under debate. In this work, we study that halo substructure using deep CFHT wide-field photometry obtained for the globular clusters NGC2419 and Koposov2, where the presence of Monoceros becomes significant because of their coincident projected position. Using Sloan Digital Sky Survey photometry and spectroscopy in the area surrounding these globulars and beyond, where the same Monoceros population is detected, we conclude that a second feature, not likely to be associated with Milky Way disk stars along the line-of-sight, is present as foreground population. Our analysis suggests that the Monoceros ring might be composed of an old stellar population of age t ~ 9Gyr and a new component ~ 4Gyr younger at the same heliocentric distance. Alternatively, this detection might be associated with a second wrap of Monoceros in that direction of the sky and also indicate a metallicity spread in the ring. The detection of such a low-density feature in other sections of this halo substructure will shed light on its nature.Comment: 10 pages, 10 figures, accepted for publication in Ap

Desarrollo de un programa de ejercicio terapéutico colaborativo, con perspectiva de género, en el grado de Fisioterapia

[Resumo] El movimiento, como agente físico aplicado con un fin terapéutico, es la base de la Cinesiterapia. Se constituye como un pilar fundamental dentro del curriculum del grado de Fisioterapia. Dentro de la asignatura “Cinesiterapia: bases del ejercicio terapéutico”, se enseña al alumnado a realizar programas de ejercicio terapéutico basados en la evidencia científica disponible, de forma grupal e individual. Con el objetivo de motivar al alumnado, y trabajar una perspectiva de género, se propone como actividad el diseño de programas de ejercicio terapéutico de forma grupal y colaborativa. El objetivo de esta experiencia es diseñar por grupos un programa de ejercicio terapéutico y favorecer un proceso de reflexión sobre las diferencias de género en la respuesta cardiovascular. Esta dinámica mejora la motivación de los estudiantes y su participación en el proceso de aprendizaje.[Abstract] Movement, as a physical agent applied with a therapeutic goal, is the basis of Kinesiotherapy. It is a fundamental pillar of the curriculum of Physiotherapy degree program. Within the subject “Kinesiotherapy: basis of therapeutic exercise”, the students learn how to design programs of therapeutic exercise based on the available scientific evidence. The design of therapeutic exercise programs is proposed, in order to motivate the students, and working on a gender perspective. It´s stablished as a grupal and collaborative activity. The outcome of this experience is designing in groups a therapeutic exercise program and a reflexion proccess about gender differences in the cardiovascular response. This dynamic implies the reflexion about the different cardiovascular responses and adaptations of women to exercise, and also how to desing justified activities for them. This activity improves motivation and participation of the students.http://hdl.handle.net/2183/2879

A MegaCam Survey of Outer Halo Satellites. VII. A Single S\'ersic Index v/s Effective Radius Relation for Milky Way Outer Halo Satellites

In this work we use structural properties of Milky Way's outer halo ($R_G > 25\,\mathrm{kpc}$) satellites (dwarf spheroidal galaxies, ultra-faint dwarf galaxies and globular clusters) derived from deep, wide-field and homogeneous data, to present evidence of a correlation in the S\'ersic index v/s effective radius plane followed by a large fraction of outer halo globular clusters and satellite dwarf galaxies. We show that this correlation can be entirely reproduced by fitting empirical relations in the central surface brightness v/s absolute magnitude and S\'ersic index v/s absolute magnitude parameter spaces, and by assuming the existence of two types of outer halo globular clusters: one of high surface brightness (HSB group), with properties similar to inner halo clusters; and another of low surface brightness (LSB group), which share characteristics with dwarf spheroidal and ultra-faint dwarf galaxies. Given the similarities of LSB clusters with dwarf spheroidal and ultra-faint dwarf galaxies, we discuss the possibility that outer halo clusters also originated inside dark matter halos and that tidal forces from different galaxy host's potentials are responsible for the different properties between HSB and LSB clusters.Comment: 20 pages, 9 figures, 3 table

Estudio a nivel de perfil de la construcción del mercado municipal de Masatepe, departamento de Masaya, en el año 2017

Estudio a nivel de perfil, de la construcción de Mercado municipal de Masatepe, Departamento de Masaya. Estudio de mercado estableciendo la demanda y el análisis de la oferta del proyecto, mediante una evaluación de campo

Identifying and characterizing ultracool dwarfs ejected from post-encounter disintegrating systems

Disintegrating multiple systems have been previously discovered from kinematic studies of the $\it Hipparcos$ catalogue. They are presumably the result of dynamical encounters taking place in the Galactic disk between single/multiple systems. In this paper, we aim to expand the search for such systems, to study their properties, as well as to characterize possible low-mass ejecta (i.e. brown dwarfs and planets). We have assembled a list of 15 candidate systems using astrometry from the Tycho-Gaia astrometric solution (later upgraded with $\it Gaia$ DR3), and here we present the discovery and follow-up of 5 of them. We have obtained DECam imaging for all 5 systems and by combining near-infrared photometry and proper motion, we searched for ultra-cool ejected components. We find that the system consisting of TYC 7731-1951-1, TYC 7731-2128 AB, and TYC 7731-1995-1ABC?, contains one very promising ultra-cool dwarf candidate. Using additional data from the literature, we have found that 3 out of 5 disintegrating system candidates are likely to be true disintegrating systems.Comment: Accepted for publication in MNRAS. 17 pages, 8 figures, 4 table