Galaxy properties from J-PAS narrow-band photometry

We study the consistency of the physical properties of galaxies retrieved from SED-fitting as a function of spectral resolution and signal-to-noise ratio (SNR). Using a selection of physically motivated star formation histories, we set up a control sample of mock galaxy spectra representing observations of the local universe in high-resolution spectroscopy, and in 56 narrow-band and 5 broad-band photometry. We fit the SEDs at these spectral resolutions and compute their corresponding the stellar mass, the mass- and luminosity-weighted age and metallicity, and the dust extinction. We study the biases, correlations, and degeneracies affecting the retrieved parameters and explore the r\^ole of the spectral resolution and the SNR in regulating these degeneracies. We find that narrow-band photometry and spectroscopy yield similar trends in the physical properties derived, the former being considerably more precise. Using a galaxy sample from the SDSS, we compare more realistically the results obtained from high-resolution and narrow-band SEDs (synthesized from the same SDSS spectra) following the same spectral fitting procedures. We use results from the literature as a benchmark to our spectroscopic estimates and show that the prior PDFs, commonly adopted in parametric methods, may introduce biases not accounted for in a Bayesian framework. We conclude that narrow-band photometry yields the same trend in the age-metallicity relation in the literature, provided it is affected by the same biases as spectroscopy; albeit the precision achieved with the latter is generally twice as large as with the narrow-band, at SNR values typical of the different kinds of data.Comment: 26 pages, 15 figures. Accepted for publication in MNRA

El Turismo creativo como dinamizador de las economías locales: Estudio de caso en una comunidad afrodescendiente

Creative tourism is currently emerging as a differential and alternative proposal for experiences to vindicate the cultural, environmental and artistic aspects, while the tourist simulates immersive interaction with social, cultural and natural landscapes. This article develops a case study with the village community of La Puerta, San Nicolás de quebrada seca, municipality of Sopetrán, Antioquia, in order to analyze the possibilities of tourism use, which can be accessed by the inhabitants of the Afro-descendant collective territory of the village of La Puerta, in Sopetrán, Antioquia, from the approach of the orange economy. For this purpose, a qualitative research method was applied, from a participatory and interactive methodological approach, with the predominance of techniques such as sociographic analysis and group discussion. Recognition of the modes of representation and territorial action of the community of La Puerta, in terms of the dynamization of social and community processes, which advocate for the protection of the ecosystemic patrimony, La Bramadora wetland. 2. Description of the process of insertion of a sustainable, creative and vindicating tourism, through conservation practices, such as bird watching, that stimulate and dynamize the development of the local economy. It is concluded that orange tourism is a dynamizer of local economic development par excellence, besides being one of the clearest bets in the process of economic recovery of the tourism sector in general.El turismo creativo emerge en la actualidad como una propuesta diferencial, alternativa y de cocreación para potenciar la vivencia de experiencias en función de reivindicar lo cultural, lo ambiental y lo artístico, al tiempo que el turista y el anfitrión se sumergen en una relación de interacción que les permite reconocerse, reunirse, desdibujarse, leerse y transitar desde la complicidad del saber por paisajes sociales, culturales y naturales. Se desarrolla en este artículo, un estudio de caso con la comunidad negra de La Puerta, corregimiento de San Nicolás de quebrada seca, municipio de Sopetrán, Antioquia, con el fin de analizar las posibilidades de aprovechamiento turístico, a las que pueden acceder los habitantes del territorio colectivo afrodescendiente de la vereda La Puerta, en Sopetrán, Antioquia, a partir del enfoque de la economía naranja. Para ello se aplicó un método de investigación cualitativo, desde un abordaje metodológico participativo e interactivo, con el predominio de técnicas como el análisis sociográfico y la discusión grupal. Se obtienen como resultados: 1. Reconocimiento de los modos de representación y actuación territorial propios de la comunidad de La Puerta, en función de la dinamización de procesos sociales y comunitarios, que propendan por la protección del patrimonio ecosistémico, humedal La Bramadora. 2. Descripción del proceso de inserción de un turismo sostenible, creativo y reivindicador, a través de prácticas de conservación, como el avistamiento de aves, que estimulen y dinamicen el desarrollo de la economía local. Se concluye que el turismo naranja es un dinamizador del desarrollo económico local por excelencia, además de ser unas de las apuestas más claras en el proceso de recuperación económica del sector turismo en general

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Abstract Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

Propuesta de incremento de productividad en los asesores de servicio en una empresa aseguradora

Tesis (Ingeniería Industrial), Instituto Politécnico Nacional, UPIICSA, 2016, 1 archivo PDF, (111 páginas). tesis.ipn.m

El grupo de alimentos del maíz en la estructura energética de la dieta de madres de hogares productores de maíces nativos en dos comunidades del centro de México

Introduction: To analyse the importance of Maize Food Group (MFG) consumption by mothers of native maize households producers. Material and methods: It is the case of a descriptive, comparative, transversal and prospective study of two communities of the State of Mexico. Santa María Nativitas (SMN) is a mestizo and peri-urban community and San Jerónimo Mavatí (SJM) is an indigenous community. The selection of mothers to be studied was by convenience (40 women in SMN and 40 women in SJM). Interviews were used for application of food frequency questionnaires to record 24 hours food intake. Descriptive statistics and Kolmogorov-Smirnov test for normal distribution of the data was performed. Data were analysed using parametric statistics (Student�s t distribution and principal component analysis). Results: Mothers from SMN consume 3,999.93 Kcal/day from which 20% are from the MFG; while Mothers from SJM consume 2,566.67 Kcal from which 33.8% are from the MFG. There is not a significant difference between SMN and SJM regarding MFG consumption, but there is with respect to other food products like cereals, sweeteners, legumes and fruits. Conclusions: In both communities there was a change on mothers´ diet; more carbohydrates from cereals and sweet drinks are consumed. This change on diet has health consequences and impacts on maize diversity conservation, as the main source of food in rural communities, and foremost, on food security for agricultural communities.Introducción: Analizar la participación del �Grupo de Alimentos del Maíz� (GAM) en la estructura energética de la dieta de las madres de los hogares que producen maíces nativos. Material y métodos: Estudio prospectivo, transversal descriptivo y comparativo. Se incluyeron a 80 madres en dos comunidades del Estado de México. 40 de una comunidad mestiza periurbana: Santa María Nativitas (SMN) y 40 de una comunidad indígena mazahua: San Jerónimo Mavatí (SJM). La muestra se seleccionó por conveniencia. Se aplicaron cuestionarios para determinar frecuencias de consumo y recordatorios de 24 horas. Se realizó estadística descriptiva y prueba Kolmogorov-Smirnov para una distribución normal de los datos. Se aplicó la prueba T de student (95%) para comparar comunidades empleando el método de análisis de componente principal. Resultados: En SMN las madres consumen 3.999,93 kcal al día, donde 20% proviene del GAM. En SJM ellas consumen 2.566,67 kcal, donde el 33,8% lo aporta GAM. No existe diferencia significativa entre ambas comunidades para el consumo de GAM, pero sí para cereales, azúcares, leguminosas y frutas. Conclusiones: En ambas localidades hubo desplazamiento del consumo del maíz debido a la introducción de otros alimentos a la dieta, destaca el elevado consumo de calorías que aportan cereales y bebidas azucaradas. Esta modificación dietética tiene implicaciones en la salud y en la pérdida de la importancia del maíz como base de la dieta rural y de la seguridad alimentaria asentada en la biodiversidad de maíces mexicanos