A search for water maser emission toward obscured post-AGB star and planetary nebula candidates

Water maser emission at 22 GHz is a useful probe to study the transition between the nearly spherical mass-loss in the AGB to a collimated one in the post-AGB phase. In their turn, collimated jets in the post-AGB phase could determine the shape of planetary nebulae (PNe) once photoionization starts. We intend to find new cases of post-AGB stars and PNe with water maser emission, including water fountains or water-maser-emitting PNe. We observed water maser emission in a sample of 133 objects, with a significant fraction being post-AGB and young PN candidate sources with strong obscuration. We detected this emission in 15 of them, of which seven are reported here for the first time. We identified three water fountain candidates: IRAS 17291-2147, with a total velocity spread of ~96 km/s in its water maser components and two sources (IRAS 17021-3109 and IRAS 17348-2906) that show water maser emission outside the velocity range covered by OH masers. We have also identified IRAS 17393-2727 as a possible new water-maser-emitting PN. The detection rate is higher in obscured objects (14%) than in those with optical counterparts (7%), consistent with previous results. Water maser emission seems to be common in objects that are bipolar in the near-IR (43% detection rate). The water maser spectra of water fountain candidates like IRAS 17291-2147 show significantly less maser components than others (e.g., IRAS 18113-2503). We speculate that most post-AGBs may show water maser emission with wide enough velocity spread (> 100 km/s) when observed with enough sensitivity and/or for long enough periods of time. Therefore, it may be necessary to single out a special group of "water fountains", probably defined by their high maser luminosities. We also suggest that the presence of both water and OH masers in a PN is a better tracer of its youth, rather than the presence of just one of these species.Comment: To be published in Astronomy & Astrophysics. 16 pages, 1 figure (spanning 5 pages). This version includes some minor language corrections and fixes some errors in Table

Review of control algorithms for mobile robotics

This article presents a comprehensive review of control algorithms used in mobile robotics, a field in constant evolution. Mobile robotics has seen significant advances in recent years, driven by the demand for applications in various sectors, such as industrial automation, space exploration, and medical care. The review focuses on control algorithms that address specific challenges in navigation, localization, mapping, and path planning in changing and unknown environments. Classical approaches, such as PID control and methods based on classical control theory, as well as modern techniques, including deep learning and model-based planning, are discussed in detail. In addition, practical applications and remaining challenges in implementing these algorithms in real-world mobile robots are highlighted. Ultimately, this review provides a comprehensive overview of the diversity and complexity of control algorithms in mobile robotics, helping researchers and practitioners to better understand the options available to address specific problems in this exciting area of study.Comment: 8 pages, in Spanis

Complete and Prolonged Response to Immune Checkpoint Blockade in POLE-Mutated Colorectal Cancer

Enid Robertson Logan Faculty Fellowship Fund6 month embargo; published online: 21 June 2019This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]

A system of three transiting super-Earths in a cool dwarf star

We present the detection of three super-Earths transiting the cool star LP415-17, monitored by K2 mission in its 13th campaign. High resolution spectra obtained with HARPS-N/TNG showed that the star is a mid-late K dwarf. Using spectral synthesis models we infer its effective temperature, surface gravity and metallicity and subse- quently determined from evolutionary models a stellar radius of 0.58 R Sun. The planets have radii of 1.8, 2.6 and 1.9 R Earth and orbital periods of 6.34, 13.85 and 40.72 days. High resolution images discard any significant contamination by an intervening star in the line of sight. The orbit of the furthest planet has radius of 0.18 AU, close to the inner edge of the habitable zone. The system is suitable to improve our understanding of formation and dynamical evolution of super-Earth systems in the rocky - gaseous threshold, their atmospheres, internal structure, composition and interactions with host stars.Comment: Accepted for publication in MNRAS Letter

Creencias sexistas y actitudes de violencia de género. Situación de estudiantes universitario del área de la salud. Cartagena - Colombia

Introduction: Violence towards women is a problem that attempts towards equalness, the development of social peace. Situation that is acknowledged as a factor associated with the deterioration in the quality of life of the individuals as it is constituted a violation of human rights. Target: To describe the degree of agreement and disagreement between the sexist beliefs and those that lead students in the health area of superior education institution of Cartagena. Materials and methods: Descriptive study, cross-sectional the calculated sample was of 509 students, selected through convenience sampling, the questionnaire of attitudes towards gender and violence was used. (C.A.G.V), the questionnaire was divided in two sections, the first one, deals with social demographics the second, sexist beliefs and violance.Results: The factor with the most disagreement and rejected to sexist beliefs it is factor 1 with 79% of participants in disagreement, the factors 2,3,4 a high percentage is shown of disagreement and indifference in men and women to the evaluated beliefs. Conclusion: It is concluded that exists behaviors that promote violence, and this study was evidenced domination, isolation and conducts that pass unnotified, this is how violence against women done by the partner or ex-partner opens fields to important health issues; problems that have shown an unbalanced and well-being psychosocial in long and short term.Introducción: La violencia contra la mujer es un problema que atenta contra la igualdad, el desarrollo y la paz social. Situación que se reconoce como factor asociado al deterioro en la calidad de vida de los individuos en la medida que se constituye en violación de los Derechos Humanos. Objetivo: Describir el grado de acuerdo o desacuerdo entre las creencias sexistas y las que conducen a la violencia en estudiantes del área de la salud de una Institución de Educación Superior de Cartagena. Materiales y métodos: Estudio descriptivo, transversal, la muestra calculada fue de 509 estudiantes, seleccionados mediante muestreo por conveniencia, se utilizó el cuestionario de Actitudes hacia el Género y la Violencia (C.A.G.V), el cuestionario se dividió en dos secciones, la primera, aborda datos sociodemográficos, la segunda, las creencias sexistas y violencia. Resultados: El factor con mayor desacuerdo y/o rechazo a las creencias sexistas es el factor 1 con un 79% de participantes en desacuerdo, los factores 2, 3 y 4 tiene presentan un alto porcentaje de desacuerdo y actitud indiferente en hombres y mujeres ante las creencias evaluadas. Conclusión: Se concluye que existen comportamientos que promueven la violencia, en este estudio se evidenció dominación, aislamiento y conductas que suelen pasar inadvertidas, es así como la violencia contra las mujeres ejercidas por sus parejas o ex parejas abre campos a importantes problemas de salud, problemas que han demostrado un desequilibrio del bienestar psicosocial a corto y/o a largo plazo

Association of Systemic Lupus Erythematosus Clinical Features with European Population Genetic Substructure

Systemic Lupus Erythematosus (SLE) is an autoimmune disease with a very varied spectrum of clinical manifestations that could be partly determined by genetic factors. We aimed to determine the relationship between prevalence of 11 clinical features and age of disease onset with European population genetic substructure. Data from 1413 patients of European ancestry recruited in nine countries was tested for association with genotypes of top ancestry informative markers. This analysis was done with logistic regression between phenotypes and genotypes or principal components extracted from them. We used a genetic additive model and adjusted for gender and disease duration. Three clinical features showed association with ancestry informative markers: autoantibody production defined as immunologic disorder (P = 6.8×10(-4)), oral ulcers (P = 6.9×10(-4)) and photosensitivity (P = 0.002). Immunologic disorder was associated with genotypes more common in Southern European ancestries, whereas the opposite trend was observed for photosensitivity. Oral ulcers were specifically more common in patients of Spanish and Portuguese self-reported ancestry. These results should be taken into account in future research and suggest new hypotheses and possible underlying mechanisms to be investigated. A first hypothesis linking photosensitivity with variation in skin pigmentation is suggested