Technological Opportunities and Solar Energy, To Contribute To Sustainable Development of Mexico

The bounded oil reserves and the need to reduce environmental pollution bordering increasingly to make solution proposals to combat the problem by reducing environmental pollution and on the other hand seek sustainability with energy savings and better quality of life for Mexicans in this paper propose alternatives to reduce fuel use and greater use of renewable energy using photovoltaic systems Unquestionably the Mexican political issue in energy will be a little difficult to treat however proposals are sustainable use solar energy leaving a balance profitable for Mexican society in the field of electromobility and basic needs such as what is the purification of water with the search for alternatives to solve a social problem purified water consumption in rural areas where currently burning firewood to boil water creates irreversible effects pollutants and respiratory diseases to solve the environmental problem raises renewable energy use using photovoltaic power systems the same systems can also be used to replace the use of fossil energy and also have the advantage over fossil fuels that are able to reach the most remote and isolated areas where needs are not yet covered which is why the great importance of the benefits offered substantial PV systems for social benefi

Costumbrismo, modernismo y criollismo en el cuento venezolano.

Sin resume

Standards of Productive Projects in Military Correctional Centers

El presente proyecto consiste en Reglamentar a los Centro Penitenciarios Militares, en donde se normatiza el reglamento para el manejo de recursos generados en los establecimientos de reclusión.This project is to regulate the Military Correctional Center, where the rules for the management of resources generated in the prisons is formulating standards

La Caldera de hundimiento de Vallehermoso Isla de La Gomera (Canarias).

Durante la realización del Proyecto MAGNA a escala 1:25.000 de la isla de La Gomera (Islas Canarias), se ha identificado una caldera de colapso en el área de Vallehermoso (hojas 73-81 Agulo y 73-82 Hermigua). La caldera presenta una forma casi circular con un diámetro de 2.4 Km aproximadamente. Su génesis puede, en principio, ser atribuida a un brusco y repentino vaciado de una cámara magmática sálica, dando lugar al hundimiento del techo. Este magma sálico es el responsable de la formación traqui-fonolítica (cone-sheets). La caldera está delimitada por fracturas escalonadas con desarrollo de importantes brechastectónicas y rellenada por tobas y brechas piroclásticas (¿ignimbríticas?) y por abundantes facies diferentes de debris-avalanche. Posteriormente al hundimiento, en las zonas de borde de la caldera, se han desarrollado intrusiones sálicas con morfología de pitones, domos, etc. Su novedad geológica dentro del marco de la isla de La Gomera, nos ha impulsado a redactar esta nota previa, que posteriormente, será seguida de una publicación más detallada

Análisis de la calidad de servicio, satisfacción, lealtad y resolución de problemas en la adquisición de billetes de transporte y reservas de alojamientos a través de Internet

El comercio electrónico entre empresas y consumidor (B2C) ha experimentado un gran auge en los últimos años. En nuestro país, los productos o servicios más demandados a través de Internet están relacionados con el sector turístico (adquisición de billetes de transporte y reservas de alojamientos). El trabajo empírico se ha realizado tomando una muestra formada por 963 compradores de alguno de estos servicios. De ellos, 232 clientes manifestaron que habían tenido algún problema o duda durante su adquisición. Nuestra investigación analiza la calidad de servicio que ofrecen las empresas a través de sus páginas Web, la satisfacción, la lealtad y la calidad en el modo de resolución de estos problemas o dudas surgidos durante la prestación de estos servicios onlin

A Scoping Review of Complexity Science in Dentistry

Introducción: El propósito de esta revisión es establecer cómo se entiende e instituye la teoría de la complejidad en odontología. Métodos: El sistema estomatognático puede ser entendido como un sistema dinámico, complejo y adaptativo. Cada condición patológica o fisiológica de este sistema involucra procesos físicos, químicos y biológicos en interacciones constantes, abiertas y cambiantes con procesos sociales, emocionales, nutricionales, políticos y económicos. En este contexto, concretamente, se plantearon las siguientes preguntas de investigación: ¿Cómo utilizan los investigadores la ciencia de la complejidad en odontología? ¿Cómo se describe la ciencia de la complejidad en los artículos de odontología? Resultados: Se realizó una breve búsqueda bibliográfica que permitió identificar 11 artículos de PubMed, así como dos de la base de datos Literatura Latinoamericana y del Caribe en Ciencias de la Salud (LILACS) y uno de la Biblioteca Cochrane para una revisión de texto completo. Los estudios sobre complejidad en las ciencias odontológicas se presentan mayoritariamente en forma de artículos de opinión crítica, que correspondieron al 50% de los artículos revisados. En odontología, la complejidad se entiende menos como una teoría y más como una línea de pensamiento relativa a los procedimientos que pueden volverse complejos en un momento dado. Conclusiones: Este artículo muestra que existen grandes dificultades para integrar la complejidad y entenderla en odontología. Hay muchos aspectos de la ciencia de la complejidad que aún deben comprenderse en la salud bucodental.Introduction: The purpose of this review is to establish how the theory of complexity is understood and instituted in dentistry. Methods: The stomatognathic system can be understood as a dynamic, complex, and adaptive system. Each pathological or physiological condition of this system involves physical, chemical, and biological processes in constant, open, and changing interactions with social, emotional, nutritional, political, and economic processes. Against this background, specifically, the following research questions were posed: How do researchers use complexity science in dentistry? How is complexity science described in dentistry articles?. Results: A brief literature search was implemented, which identified 11 PubMed articles as well as two from the Literatura Latinoamericana y del Caribe en Ciencias de la Salud (LILACS) database and one from the Cochrane Library for a full text review. Studies on complexity in the dental sciences are mostly presented in the form of critical opinion articles, which corresponded to 50% of the reviewed articles. In dentistry, complexity is understood as less of a theory and more as a line of thinking regarding procedures that can become complex at any given time. Conclusion: This article shows that there are great difficulties in integrating complexity and understanding it in dentistry. There are many aspects from complexity science that still need to be understood in oral health

Towards an efficient one-class classifier for mobile devices and wearable sensors on the context of personal risk detection

In this work, we present a first step towards an efficient one-class classifier well suited for mobile devices to be implemented as part of a user application coupled with wearable sensors in the context of personal risk detection. We compared one-class Support Vector Machine (ocSVM) and OCKRA (One-Class K-means with Randomly-projected features Algorithm). Both classifiers were tested using four versions of the publicly available PRIDE (Personal RIsk DEtection) dataset. The first version is the original PRIDE dataset, which is based only on time-domain features. We created a second version that is simply an extension of the original dataset with new attributes in the frequency domain. The other two datasets are a subset of these two versions, after a feature selection procedure based on a correlation matrix analysis followed by a Principal Component Analysis. All experiments were focused on the performance of the classifiers as well as on the execution time during the training and classification processes. Therefore, our goal in this work is twofold: we aim at reducing execution time but at the same time maintaining a good classification performance. Our results show that OCKRA achieved on average, 89.1% of Area Under the Curve (AUC) using the full set of features and 83.7% when trained using a subset of them. Furthermore, regarding execution time, OCKRA reports in the best case a 33.1% gain when using a subset of the feature vector, instead of the full set of features. These results are better than those reported by ocSVM, in which case, even though the AUCs are very close to each other, execution times are significantly higher in all cases, for example, more than 20 h versus less than an hour in the worst-case scenario. Having in mind the trade-off between classification performance and efficiency, our results support the choice of OCKRA as our best candidate so far for a mobile implementation where less processing and memory resources are at hand. OCKRA reports a very encouraging speed-up without sacrificing the classifier performance when using the PRIDE dataset based only on time-domain attributes after a feature selection procedure

Measuring material thickness changes through tri-aperture digital speckle pattern interferometry

A configuration for the measurement of thickness changes in materials through one-shot digital speckle pattern interferometry (DSPI) was developed. The phase maps calculation was made by adding carrier fringes by the multiple aperture principle and Fourier Transform Method (FTM). With this setup, interferometry configurations verified that the simultaneous and instantaneous visualization of two opposite faces of a surface is possible. In addition, the combination of the simultaneous results obtained from both sides of the material makes it possible to determine displacements with greater sensitivity or to identify changes in their thickness. The validation and demonstrative tests were carried out with a 1-mm-thick aluminum plate with a 5-mm diameter through hole coated. Thickness changes to 2 μm were measured. © 2023 Society of Photo-Optical Instrumentation Engineers (SPIE)