Sistema de gestión de encuestas turísticas en línea para el análisis de segmento meta en la Riviera Maya

Actualmente hay una gran competencia para la generación de encuestas en línea, existen formatos diversos. Sin embargo, en algunos casos se requiere realizar una encuesta a la medida, como en el caso del sector turismo, donde en cada zona se aplican distintos criterios de acuerdo a la ubicación geográfica para posteriormente aplicar algoritmos de clasificación para detectar las clases que reflejen el segmento de mercado. Por lo que en este trabajo se propone un sistema que permite generar encuestas para posteriormente transformar los datos resultantes a un esquema compatible con Weka para la realización de análisis de datos

Metodología para el apoyo de generación de dominios para representar conocimiento

Los sistemas inteligentes siempre han sido motivo de culto considerando desde películas, avances científicos y tendencias tecnológicas. Construir este tipo de aplicaciones es sumamente complejo porque se requieren elementos como: bases de conocimiento, mecanismos de inferencia para la toma de decisiones, generación de acciones y respuestas por parte de los agentes inteligentes. El insumo principal para el funcionamiento del agente es contar con una base de conocimiento lo suficientemente amplia, que esté sustentada en el dominio del cual se quiere trabajar, del conocimiento de expertos, esto implica que los ingenieros de conocimiento deben ser capaces de extraer cada elemento del dominio, sus relaciones y sus estructuras, para generar cuestionamientos y respuestas eficientes que no sean descartados por los humanos como acciones incorrectas o poco creíbles del agente. En este trabajo se presenta una metodología de apoyo a los estudiantes de la materia de ingeniería del conocimiento a construir sus dominios a partir de un ejemplo al alcance de sus manos como es la elaboración de platillos. Se consideró para el diseño de esta metodología la empatía considerando los momentos que vive la sociedad ante la pandemia, generar una experiencia significativa que sea difícil de olvidar, que sea lo suficientemente asociativa para establecer un proceso cognitivo de manera que ellos sean capaces de desarrollar una representación de conocimiento fuera del contexto escolar. Los resultados de esta metodología aportan información importante sobre los procesos de aprendizaje de los estudiantes, así como el proceso de retroalimentación que tuvieron entre los equipos de trabajo para poder generar estrategias para la identificación de términos del dominio muy diversas y efectivas de acuerdo con un modelo situacional generado a partir de la experiencia que han tenido en otras materias con distintas herramientas y técnicas para obtener información

Estrategia de posicionamiento para Toner shop en el mercado de insumos de impresión para venta al consumidor final en el Estado de México y en específico en el Municipio de Cuautitlán Izcalli

Seminario: La Efectividad empresarial basada en tácticas y estrategias comerciales para entornos competitivo

HAWC and Fermi-LAT detection of extended emission from the unidentified source 2HWC J2006+341

The discovery of the TeV point source 2HWC J2006+341 was reported in the second HAWC gamma-ray catalog. We present a follow-up study of this source here. The TeV emission is best described by an extended source with a soft spectrum. At GeV energies, an extended source is significantly detected in Fermi-LAT data. The matching locations, sizes, and spectra suggest that both gamma-ray detections correspond to the same source. Different scenarios for the origin of the emission are considered and we rule out an association to the pulsar PSR J2004+3429 due to extreme energetics required, if located at a distance of 10.8 kpc.Universidad de Costa Rica/[112-B9-171]/UCR/Costa RicaUniversidad de Costa Rica/[112-B6-509]/UCR/Costa RicaUniversidad de Costa Rica/[829-B5-198]/UCR/Costa RicaUCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de Físic

The High-Altitude water cherenkov (HAWC) observatory in México: The primary detector

The High-Altitude Water Cherenkov (HAWC) observatory is a second-generation continuously operated, wide field-of-view, TeV gamma-ray observatory. The HAWC observatory and its analysis techniques build on experience of the Milagro experiment in using ground-based water Cherenkov detectors for gamma-ray astronomy. HAWC is located on the Sierra Negra volcano in México at an elevation of 4100 meters above sea level. The completed HAWC observatory principal detector (HAWC) consists of 300 closely spaced water Cherenkov detectors, each equipped with four photomultiplier tubes to provide timing and charge information to reconstruct the extensive air shower energy and arrival direction. The HAWC observatory has been optimized to observe transient and steady emission from sources of gamma rays within an energy range from several hundred GeV to several hundred TeV. However, most of the air showers detected are initiated by cosmic rays, allowing studies of cosmic rays also to be performed. This paper describes the characteristics of the HAWC main array and its hardware.UCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de Físic

Combined dark matter searches towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, H.E.S.S., MAGIC, and VERITAS

Cosmological and astrophysical observations suggest that 85\% of the total matter of the Universe is made of Dark Matter (DM). However, its nature remains one of the most challenging and fundamental open questions of particle physics. Assuming particle DM, this exotic form of matter cannot consist of Standard Model (SM) particles. Many models have been developed to attempt unraveling the nature of DM such as Weakly Interacting Massive Particles (WIMPs), the most favored particle candidates. WIMP annihilations and decay could produce SM particles which in turn hadronize and decay to give SM secondaries such as high energy $\gamma$ rays. In the framework of indirect DM search, observations of promising targets are used to search for signatures of DM annihilation. Among these, the dwarf spheroidal galaxies (dSphs) are commonly favored owing to their expected high DM content and negligible astrophysical background. In this work, we present the very first combination of 20 dSph observations, performed by the Fermi-LAT, HAWC, H.E.S.S., MAGIC, and VERITAS collaborations in order to maximize the sensitivity of DM searches and improve the current results. We use a joint maximum likelihood approach combining each experiment's individual analysis to derive more constraining upper limits on the WIMP DM self-annihilation cross-section as a function of DM particle mass. We present new DM constraints over the widest mass range ever reported, extending from 5 GeV to 100 TeV thanks to the combination of these five different $\gamma$-ray instruments

Paediatric COVID-19 mortality: a database analysis of the impact of health resource disparity

Background The impact of the COVID-19 pandemic on paediatric populations varied between high-income countries (HICs) versus low-income to middle-income countries (LMICs). We sought to investigate differences in paediatric clinical outcomes and identify factors contributing to disparity between countries.Methods The International Severe Acute Respiratory and Emerging Infections Consortium (ISARIC) COVID-19 database was queried to include children under 19 years of age admitted to hospital from January 2020 to April 2021 with suspected or confirmed COVID-19 diagnosis. Univariate and multivariable analysis of contributing factors for mortality were assessed by country group (HICs vs LMICs) as defined by the World Bank criteria.Results A total of 12 860 children (3819 from 21 HICs and 9041 from 15 LMICs) participated in this study. Of these, 8961 were laboratory-confirmed and 3899 suspected COVID-19 cases. About 52% of LMICs children were black, and more than 40% were infants and adolescent. Overall in-hospital mortality rate (95% CI) was 3.3% [=(3.0% to 3.6%), higher in LMICs than HICs (4.0% (3.6% to 4.4%) and 1.7% (1.3% to 2.1%), respectively). There were significant differences between country income groups in intervention profile, with higher use of antibiotics, antivirals, corticosteroids, prone positioning, high flow nasal cannula, non-invasive and invasive mechanical ventilation in HICs. Out of the 439 mechanically ventilated children, mortality occurred in 106 (24.1%) subjects, which was higher in LMICs than HICs (89 (43.6%) vs 17 (7.2%) respectively). Pre-existing infectious comorbidities (tuberculosis and HIV) and some complications (bacterial pneumonia, acute respiratory distress syndrome and myocarditis) were significantly higher in LMICs compared with HICs. On multivariable analysis, LMIC as country income group was associated with increased risk of mortality (adjusted HR 4.73 (3.16 to 7.10)).Conclusion Mortality and morbidities were higher in LMICs than HICs, and it may be attributable to differences in patient demographics, complications and access to supportive and treatment modalities