GIS-Based Wind and Solar Power Assessment in Central Mexico

In Mexico, the economic and industrial development is in the center and north; this represents more than 50% of the country’s total consumption. Data on population and energy consumption will be obtained from the following sources: the National Institute of Geography and Statistics (INEGI), and the Energy Information System. Regarding meteorological data, two databases are used: the Automatic Weather Stations (AWS) (for solar irradiance data) and the MERRA-2 reanalysis data (for wind data). These data will be analyzed for use in a geographic information system (GIS) using kriging interpolation to create maps of solar and wind energy. The area studied includes the following states: Mexico City, Puebla, State of Mexico, Hidalgo, Morelos, Zacatecas, Queretaro, San Luis Potosi, Guanajuato, Aguascalientes and Tlaxcala. The results showed that the areas with the highest solar potential are Hidalgo, Estado de México, Morelos, northern Puebla, southern Queretaro, northwestern Guanajuato, and northern Zacatecas, with 5.89 kWh/m2/day, and the months with the highest solar potential are March, April, May, and June. Regarding wind potential, the maximum wind power density is in Puebla, with 517 W/m2, and the windy season in central Mexico spans June, July, August, September, October, and November

Off-the-Cuff Law-Making: Policing Pandemic Dispossession in Spain

This article presents a discussion concerning the role of police rationale(s) in Spain within the context of the Covid-19 pandemic, where exceptionalist strategies aimed at curtailing the spread of the virus came to dramatically strengthen existing social divisions. In line with some authors who have already approached this phenomenon from different disciplines, our premise is that most serious emergencies boosted by Covid-19 were not a mere matter of public health, but rather a particularly harmful expression of accumulation by dispossession. Thus, rather than a flaw in the system produced by an exceptional friction between public security and public health, securitarian performances deployed by neoliberal states can be read as symbiotic strategies, from both law and order and business as usual approaches, to manage the social “externalities” of capitalist predatory strategies. As we will argue, phenomena such as the reinforcement of the policing consensus, police production of law, or the authoritarian turn favored by the Covid-19 health crisis must all be analyzed in this context

Analysis of a novel proposal using temperature and efficiency to prevent fires in photovoltaic energy systems

Fires in photovoltaic (PV) electrical systems are a real and serious problem because this phenomenon can have severe consequences for the safety of people and the environment. In some cases, fires result from a lack of maintenance or improper installation of PV modules. It is essential to consider prevention and continuous monitoring of the electrical parameters to minimize these risks, as these factors increase the temperature of the photovoltaic modules. The use of thermal analysis techniques can prevent hotspots and fires in photovoltaic systems; these techniques allow detecting and correcting problems in the installation, such as shadows, dirt, and poor-quality connections in PVs. This paper presents a case study of the implementation of thermal analysis in an installation of photovoltaic modules connected to a solar pumping system to identify the formation of hotspots through thermal images using an unmanned aerial vehicle (UAV). Here, a novel methodology is proposed based on the comparison of temperature increases concerning the values of short circuit current, open circuit voltage, and real efficiency of each PV module. In addition, an electrical safety methodology is proposed to design a photovoltaic system that prevents fires caused by hotspots, contemplating critical parameters such as photovoltaic power, number of photovoltaic modules, DC:AC conversion ratio, electrical conductor selection, control devices, and electrical protection; the performance power expected was obtained using standard power test conditions, including irradiance factor, photovoltaic module (PVM) temperature factor, and power reduction factor

Bibliometric analysis of scientific production of Mexican Journal of Eating Disorders, 2010-2014

AbstractThe aim of this research was to characterize the scientific production of the Revista Mexicana de Trastornos Alimentarios/Mexican Journal of Eating Disorders during the 2010-2014 period. A retrospective and descriptive analysis of published articles in the period 2010-2014 was performed. The type of production, authorship pattern, country, average number of references per article, and type of documents cited were analyzed. The results showed that 70 articles were published in five volumes of the Revista Mexicana de Trastornos Alimentarios/Mexican Journal of Eating Disorders. The highest percentage was original studies (64.28%). The mean number of author per article was four, and five women were the highest productive ones. Mexican researchers have been made the most percentage of contributions (60%) and most of them belong to the Universidad Nacional Autónoma de México. Furthermore, the collaboration among researchers of two or three different countries was identified. On average of 46 references were cited per article, mostly of them were scientific journal articles. It is concluded that Revista Mexicana de Trastornos Alimentarios/Mexican Journal of Eating Disorders showed similar indexes to those obtained by health journals and psychology journals.ResumenEl objetivo de esta investigación fue caracterizar la producción científica de la Revista Mexicana de Trastornos Alimentarios/Mexican Journal of Eating Disorders del periodo 2010-2014. Se llevó a cabo un análisis descriptivo retrospectivo de los artículos publicados en el periodo 2010-2014. Se analizó el tipo de artículo, el patrón de autoría, país, promedio de referencias incluidas en los artículos y tipo de referencia incluida. Los resultados mostraron que se publicaron 70 artículos en los cinco volúmenes de la Revista Mexicana de Trastornos Alimentarios/Mexican Journal of Eating Disorders. El mayor porcentaje de artículos correspondió a trabajos originales (64.28%). El promedio de autores por artículo fue de cuatro y se identificaron cinco autoras con la mayor producción. Investigadores mexicanos han realizado el mayor porcentaje de contribuciones (60%) y la mayoría pertenece a la Universidad Nacional Autónoma de México. Asimismo, se identificó la colaboración entre investigadores de dos o tres países. En promedio se incluyeron 46 referencias por artículo, principalmente artículos de revistas científicas. Se concluye que la Revista Mexicana de Trastornos Alimentarios/Mexican Journal of Eating Disorders presentó índices similares a los obtenidos en revistas del área de la salud y de psicología

Panorama económico para el desarrollo del peso digital emitido por el Banco de México

Al paso de los años, la economía del mundo en el que vivimos va evolucionando a pasos agigantados, y a la par de este cambio en los ecosistemas, se ha podido apreciar la aparición de nuevas tecnologías derivadas del surgimiento de las criptomonedas, siendo la base para el desarrollo de las monedas digitales que serán emitidas por los bancos centrales de Europa y Asia. A través de encuestas aplicadas a personas inmersas en la utilización de los diferentes métodos de pago en la comunidad estudiantil, se realizó esta investigación con el objetivo de analizar el panorama de los métodos de transacciones electrónicos en México, para determinar el posible escenario que podría tener la creación del peso digital respaldado por Banxico, dando como resultado que existe una buena aceptación, sin embargo la sociedad mexicana no se encuentra preparada para hacerle frente a este tipo de cambio en la economía

Densidad de población en maíz, coeficiente de atenuación de luz y rendimiento

Durante 2008 y 2009 se evaluaron seis cultivares de maíz bajo tres densidades de población en Toluca, México, con el objetivo de conocer su índice de área foliar, coe f iciente de atenuación de luz, radiación interceptada, e f iciencia en el uso de la radiación y rendimiento de grano. Se utilizó un diseño de bloques al azar con arreglo en parcelas divididas, las parcelas grandes correspondieron a las densidades de población (6.9, 7.8 y 8.9 plantas m -2 ) y las subparcelas a los cultivares (Amarillo, Cacahuacintle, Jiquipilco, Z-60, Cóndor y H-50). El análisis de varianza combinado detectó diferencias signi f icativas entre años, densidades y cultivares para todas las variables, con excepción del coe f iciente de atenuación de luz y radiación interceptada entre años. Las interacciones no fueron signi f icativas, excepto en años × densidades en el índice de área foliar y en años × cultivares para rendimiento de grano. Entre años, el rendimiento promedio de los cultivares fue superior en 2008 (1 133 g m -2 ), 16.9% a 2009, debido al mayor número de granos m -2 (2 826) y a la e f iciencia en el uso de la radiación (0.79 g MJ -1 ). Las mejores densidades de población fueron 7.8 y 8.9 plantas m -2 (rendimiento promedio de 1 081 y 1 096 g m -2 , respectivamente) equivalente a 13.9% y 15.1% más que con 6.9 plantas m -2 . Lo anterior fue consecuencia de los mejores promedios presentados por estas densidades de población en todas las variables bajo estudio. Entre cultivares, Jiquipilco, Amarillo y Cóndor presentaron el rendimiento promedio más alto con 1 156, 1 076 y 1 047 g m -2

Self-Reported Prevalence of Gluten-Related Disorders and Adherence to Gluten-Free Diet in Colombian Adult Population

Background. Celiac disease seems to be rare in Colombians, but there are currently no data about the prevalence rates of symptomatic adverse reactions to gluten or adherence to gluten-free diet (GFD) in this population. Aim. to evaluate the self-reported prevalence rates of adverse reactions to gluten, adherence to GFD, and gluten-related disorders at population level in Colombia. Methods. A self-administered questionnaire-based cross-sectional study was conducted in a population from Northwest Colombia. Results. The estimated prevalence rates were (95% CI) 7.9% (6.5–9.6) and 5.3% (4.1–6.7) for adverse and recurrent adverse reactions to wheat/gluten, respectively, adherence to GFD 5.9% (4.7–7.4), wheat allergy 0.74% (0.3–1.4), and nonceliac gluten sensitivity 4.5% (3.5–5.8). There were no self-reported cases of celiac disease. Prevalence of self-reported physician-diagnosis of gluten-related disorders was 0.41% (0.17–0.96). Most respondents reported adherence to GFD without a physician-diagnosis of gluten-related disorders (97.2%). The proportion of gluten avoiders was 17.2% (15.2–19.5). Most of them did not report recurrent adverse reactions to wheat/gluten (87.0%). Conclusions. Nonceliac gluten sensitivity is rarely formally diagnosed in Colombia, but this population has the highest prevalence rate of adherence to GFD reported to date. Consequently, most respondents were avoiding wheat- and/or gluten-based products for reasons other than health-related symptoms

Multimorbidity Patterns and Their Association with Social Determinants, Mental and Physical Health during the COVID-19 Pandemic

Background: The challenge posed by multimorbidity makes it necessary to look at new forms of prevention, a fact that has become heightened in the context of the pandemic. We designed a questionnaire to detect multimorbidity patterns in people over 50 and to associate these patterns with mental and physical health, COVID-19, and possible social inequalities. Methods: This was an observational study conducted through a telephone interview. The sample size was 1592 individuals with multimorbidity. We use Latent Class Analysis to detect patterns and SF-12 scale to measure mental and physical quality-of-life health. We introduced the two dimensions of health and other social determinants in a multinomial regression model. Results: We obtained a model with five patterns (entropy = 0.727): ‘Relative Healthy’, ‘Cardiometabolic’, ‘Musculoskeletal’, ‘Musculoskeletal and Mental’, and ‘Complex Multimorbidity’. We found some differences in mental and physical health among patterns and COVID-19 diagnoses, and some social determinants were significant in the multinomial regression. Conclusions: We identified that prevention requires the location of certain inequalities associated with the multimorbidity patterns and how physical and mental health have been affected not only by the patterns but also by COVID-19. These findings may be critical in future interventions by health services and governments17 página

The Synoptic All-Sky Infrared (SASIR) Survey

We are proposing to conduct a multicolor, synoptic infrared (IR) imaging survey of the Northern sky with a new, dedicated 6.5-meter telescope at San Pedro M\'artir (SPM) Observatory. This initiative is being developed in partnership with astronomy institutions in Mexico and the University of California. The 4-year, dedicated survey, planned to begin in 2017, will reach more than 100 times deeper than 2MASS. The Synoptic All-Sky Infrared (SASIR) Survey will reveal the missing sample of faint red dwarf stars in the local solar neighborhood, and the unprecedented sensitivity over such a wide field will result in the discovery of thousands of z ~ 7 quasars (and reaching to z > 10), allowing detailed study (in concert with JWST and Giant Segmented Mirror Telescopes) of the timing and the origin(s) of reionization. As a time-domain survey, SASIR will reveal the dynamic infrared universe, opening new phase space for discovery. Synoptic observations of over 10^6 supernovae and variable stars will provide better distance measures than optical studies alone. SASIR also provides significant synergy with other major Astro2010 facilities, improving the overall scientific return of community investments. Compared to optical-only measurements, IR colors vastly improve photometric redshifts to z ~ 4, enhancing dark energy and dark matter surveys based on weak lensing and baryon oscillations. The wide field and ToO capabilities will enable a connection of the gravitational wave and neutrino universe - with events otherwise poorly localized on the sky - to transient electromagnetic phenomena.Comment: Revised version of submitted whitepaper to the "Optical and IR Astronomy from the Ground" Program Prioritization Panel of the Astro2010 Decadal Survey; 23 page