Results 31 to 40 of about 162,144 (257)

Reciclaje de residuos de cuero: una revisión de estudios experimentales

Informador Técnico, 2015
El curtido del cuero convierte las pieles naturales en materiales flexibles, imputrescibles y duraderos, mediante complejos procesos que generan cantidades significativas de residuos que representan un problema ambiental si no se gestionan adecuadamente.
Sandra Milena Velásquez Restrepo, Diego Hernán Giraldo Vásquez, Natalia Cardona Vásquez   +2 more
doaj   +1 more source

Evaluación de riesgos laborales y estudio de métodos en el proceso de elaboración de puro “Joya de Nicaragua antaño” en la Tabacalera Joya de Nicaragua S.A, Estelí

El Higo, 2023
La investigación tuvo como propósito evaluar los riesgos laborales y los métodos utilizados en la producción del puro "Joya de Nicaragua Antaño" en la Tabacalera Joya de Nicaragua S.A. El objetivo principal fue describir las generalidades de la empresa,
Yaisa Jaylenne Murillo Ruíz, Donald Ramón Ponce Fonseca, Brisa Danelia Herrera Sarantes, Shirley Sarahi Rojas Muñoz, Iris Ivanna Valenzuela Ruíz, Joseph Josué Jarquín Orozco, Dominga Dalila González Cantarero, Claudia Tatiana Valdivia García   +7 more
doaj   +1 more source

Hybrid Fuzzy–DDPG Approach for Efficient MPPT in Partially Shaded Photovoltaic Panels

Applied Sciences
Partial shading conditions reduce the efficiency of photovoltaic (PV) systems by introducing multiple local maxima in the power–voltage curve, complicating Maximum Power Point Tracking (MPPT).
Diana Ortiz-Munoz, David Luviano-Cruz, Luis A. Perez-Dominguez, Alma G. Rodriguez-Ramirez, Francesco Garcia-Luna   +4 more
doaj   +1 more source

Manufactura artesanal de papel

Revista de Ingeniería Industrial, 2020
The work addresses the feasibility of a proposal to recycle handmade paper at the Faculty of Mechanical Engineering and Naval Sciences of the University of Veracruz, Region Veracruz; creating handmade paper with leaf residues that were already used in administrative and academic procedures, creating a sustainable impact in its three dimensions (social,
Adolfo Ramírez-Román, Ángel Suárez-Álvarez, Luis Alberto Rodríguez-Rodríguez, Jacqueline Chabat-Uranga   +3 more
openaire   +1 more source

Indentation Curves in Viscoplastic Alloys: Mathematical Model, Fitting Procedures, and Application to the Room-Temperature Creep of an Al-Sn Alloy

Advances in Materials Science and Engineering, 2016
Hardness is an important design parameter but, in rate-dependent materials, its value depends on the indentation speed and dwell time during measurement.
V. H. Jacobo, A. Ortiz, R. Schouwenaars
doaj   +1 more source

Recommendation and Classification Systems: A Systematic Mapping Study

Scientific Programming, Volume 2019, Issue 1, 2019., 2019
Today, recommendation algorithms are widely used by companies in multiple sectors with the aim of increasing their profits or offering a more specialized service to their customers. Moreover, there are countless applications in which classification algorithms are used, seeking to find patterns that are difficult for people to detect or whose detection ...
J. G. Enríquez, L. Morales-Trujillo, Fernando Calle-Alonso, F. J. Domínguez-Mayo, J. M. Lucas-Rodríguez, Luis Iribarne   +5 more
wiley   +1 more source

Chloride Sensor Based on Silver Nanoparticles Coupled with a Fast‐Response MOSFET System

Advanced Sensor Research, Volume 5, Issue 1, January 2026.
A potentiometric sensor based on a MOSFET device (Metal‐Oxide‐Semiconductor Field‐Effect Transistor) and silver nanoparticles (AgNPs) was developed for chloride quantification, offering increased signals, fast response, and efficient data processing, which can be used for monitoring and diagnosis.
Ricardo Antonio Escalona‐Villalpando, Arruan David Beristain‐Valadez, Daniel Resendiz‐Jaramillo, Fabiola Ilian Espinosa‐Lagunes, Verónica Avila‐Vazquez, Omero Alonso‐González, Sergio Miguel Duron‐Torres, José Roberto Espinosa‐Lumbreras, Luis Gerardo Arriaga, Janet Ledesma‐García   +9 more
wiley   +1 more source

Conceptual Design of an Unmanned Fixed‐Wing Aerial Vehicle Based on Alternative Energy

International Journal of Aerospace Engineering, Volume 2019, Issue 1, 2019., 2019
This paper focuses on the aerodynamics and design of an unmanned aerial vehicle (UAV) based on solar cells as a main power source. The procedure includes three phases: the conceptual design, preliminary design, and a computational fluid dynamics analysis of the vehicle. One of the main disadvantages of an electric UAV is the flight time; in this sense,
Alan G. Escobar-Ruiz, Omar Lopez-Botello, Luis Reyes-Osorio, Patricia Zambrano-Robledo, Luis Amezquita-Brooks, Octavio Garcia-Salazar, Hikmat Asadov   +6 more
wiley   +1 more source

Estrés financiero en el sector manufacturero de Ecuador

Revista Finanzas y Política Económica, 2020
El presente artículo clasifica a las empresas manufactureras del Ecuador en empresas con estrés financiero (ECE) y sin estrés financiero (ESE). Para tal efecto, se clarifica el significado de estrés financiero y el criterio bajo el cual una empresa sería
Freddy Benjamin Naula-Sigua, Diana Jackeline Arévalo-Quishpi, Jorge Andrés Campoverde-Picón, Josselyn Patricia López-González   +3 more
doaj   +1 more source

Effect of a Behavioral Change Communication Strategy Coupled With Small‐Quantity Lipid‐Based or Micro‐Nutrient Supplements on Stunting and Obesity in Children in Baja Verapaz, Guatemala: Results From a Cluster Randomized Controlled Trial

Maternal &Child Nutrition, Volume 21, Issue 3, July 2025.
Coupling a multilevel participatory‐ludic BCC strategy with the use of unsweetened SQ‐LNS reduces the risk of being overweight or obese in infants and young children from Guatemala. Yet, complementary interventions to address non‐nutritional factors related to stunting in Guatemala are needed. ABSTRACT The co‐existence of childhood stunting and obesity
Carolina Gonzalez Acero, Sebastian Martinez, Ana Perez‐Exposito, Solis Winters   +3 more
wiley   +1 more source