The emergency closure of educational institutions, in the face health contingency due to Covid-19, has prompted rethinking models teaching competencies adapt virtual learning environments (VLE). objective this study is design and validate a model VLE, with support laboratories, ensure quality higher education during covid-19 pandemic. A quantitative correlational methodology was used case study. research divided into two methodological moments: its validation. instruments were comparative...

Nanomaterials are widely used in health and biomedical applications, however, only a few studies investigate their toxic effects.  The present report signifies contribution to the study of effects silver nanoparticles on   E. coli cells, which is model organism anthropogenic pollution. toxicity depends on chemical surface properties, shape size. Nanoparticles that have same composition but different shapes or sizes might cells. In this work, Ag nanoparticles  were biosynthesized with an...

El principal problema en el desarrollo de software es generar aplicaciones que no acaban satisfaciendo las necesidades y objetivos organizaciones (clientes). la actualidad impacta directamente a los metas tienen planeadas organizaciones, decir se desarrolla por expertos tecnologías información (TI) dedican realizar procesos análisis, diseño para creación nuevas herramientas tecnológicas (software). Sin embargo, hacen acompañar organización contribuyan al óptimo funcionamiento del software....

This article presents a computational numerical model for the simulation and analysis of quantum chemistry Gibbs free energy theory using static (ANNS), dynamic (DANN), chaotic neural networks (CANN). The calculates physical-surface mechanics hardness, adhesion, strength. They resulted in nanostructured metal coatings with electrodeposited chromium nanoparticles on low-carbon steel. ANNS, DANN, CANN simulations showed that model-obtained values analyzed properties presented an approximation...

In this paper the deposition and surface growth of chromium nanoparticles (CrNPs) coatings on a commercial steel substrate by electrodeposition at constant current, is presented; both theoretically through theoretical-computational model applying modified Schrödinger equation, energy potentials electrochemistry phitosynthesis Cr Nanoparticles . For simulation process, finite element method (FEM) was used considering equation electric potential electroneutrality with without inclusion quantum...

This work describes the use of Kalman filtering to estimate changes frequency Mexican grid. An off-line analysis variation is presented. was done using real data extracted from grid during August 2004. It shown that, although indexes do not converge an exact value, they maintain a low following initial iterative steps. The precision estimation limited by unknown load disturbances but this technique could be useful predict and also

Abstract A descriptive analysis of 416 documents was performed using bibliometric techniques, in order to gather existing knowledge circular economy (CE) focusing on waste management (2007–2020). The results this study indicate that annual scientific production increased 94% the last five years; highlighting countries Italy, Spain, United Kingdom, China, Brazil and India. conceptual indicates strong linkage between CE sustainable production, recycling. Emerging research trends evolved from...

Production of different compounds can generate large amounts hazardous wastes which are dangerous to the environment and human health. The disposal or treatment liquid waste rich in heavy metals like silver (Ag), mercury (Hg) chromium (Cr) is difficult due strong acidity toxicity usually present these contaminants. For this study, several research works were reviewed order obtain an efficient viable time removal efficiency. A series chemical precipitations evaluated for efficiency reduction...

The article presents an open-access code, written in CUDA® and C++ programming language, applicable for generating computational models of nanostructured surface coatings deposited by electrodeposition. code uses the Schrödinger equation, energy potentials, electrochemistry as a theoretical basis to determine deposition electrodeposition energies, allowing prediction formation growth these coatings. Likewise, parameter variation enabled within provides determining main parameters (voltage,...

Manufacturing line core mills in steel production for hot strip rolling shape and provide its characteristic sheet properties. A tandem mill is one of these configurations which restricts the thickness removes surface layer or scale. It feasible to implement a mathematical model enable prediction used backup roll behaviour during this phase. This article consists evaluation main variables wear rolling, where rolls receive primary loads, establishes from changes variable values along with an...

This data article presents a simulation model based on quantum mechanics and energy potentials for obtaining that allows, from the perspective of materials informatics, prediction electrodeposition mechanism forming nanostructured metallic coatings. The development research is divided into two parts i) formulation (Quantum mechanical Corrected electron prediction; using modified Schrödinger equation) ii) implementation theoretical (Discretization model). For process, finite element method...

Abstract Companies have adopted green marketing and strategies to position themselves in consumer preferences, where the circular economy emerges as a solution move towards responsible production consumption patterns. From waste recycling strategies, descriptive analysis of 120 documents from SCOPUS database was carried out using bibliometric techniques know existing state art for period 1977–2021. The results indicate that annual scientific increased last ten years by over 200% 2019,...

At present, to compete openly in global markets, two concepts are needed generate competitive advantages: innovation and sustainability. Several studies have presented strategies relate them. However, a model that promotes the sustainability dimensions through focused on an integral recognition is needed. The aim of this research determine influence factors sustainable development model. methodology consisted analysing selecting published process as well one identify correlation between For...

La complejidad en la administración de las cadenas suministro ha significado que varias empresas no cuenten con todos los recursos y capacidades para alcanzar cambios necesarios por sí mismas. Por tal motivo, este estudio plantea preguntas investigación relación a presencia proveedores servicios logísticos México. Para responder estas se aplicó una encuesta 166 movilizan carga región Centro - Golfo A partir respuestas el análisis varianza (ANOVA) cinco hipótesis planteadas especializados...

Software development for mobile platforms demands adapting and sometimes replacing current or traditional technologies methodologies. The use of Agile Methods seems to be one the handiest choices. Thus Prosoft has detected an area opportunity is now encouraging software through various mechanisms, such as creation regional clusters focused on information technologies. This article presents analysis towards identification best practices in oriented (APPs), which allow Mexican factories...