Nova Scientia  

Miguel Ramírez González,Rafael Castellanos Bustamante,Jorge Guillermo Calderón Guizar

A Bat Optimization Algorithm (BOA) based tuning approach for the robust design of power system stabilizers (PSSs) in multimachine systems is presented in this paper. In order to successfully damp overall power system electromechanical oscillations, an opt... see more

Ricardo Ramírez-Aldana

Observations corresponding to spatial units are commonly studied. If we want to see whether a continuous variable has the same distribution in a group of populations, different methods can be used according to the characteristics of the data. It could occ... see more

Yuneisy Milagro Aguero-Fernandez,Luis Guillermo Hernández-Montiel,Alejandra Nieto-Garibay,Enrique Troyo-Diéguez,Ramón Zulueta-Rodríguez,Bernardo Murillo Amador

In nature, plants are exposed to various stress conditions that retard their development and decrease yield. One of the most widespread agricultural problems is the accumulation of salts in the soil surface or salinization of irrigation water. The objecti... see more

Alajandra Hernández-García,Rafael Salgado-Garciglia,Enrique Ambriz-Parra

Introduction: Dalbergia congestiflora Pittier (campincerán) is used to make musical instruments in Michoacán (México) so this specie is considered overexploited and at risk of extinction. Propagation studies of campincerán are scarce, but the factors that... see more

Jorge Zuno Silva

For this work, hot-rolled plates of medium carbon steel (0.5%C) were prepared with different sulphur contents (0.023% to 0.065%). Two steels were alloyed with mischmetal (0.01%) as inclusions modifier to evaluate its effect on fatigue and tensile properti... see more

Domingo Ruvalcaba Ruiz

Siempreviva (Sedum praealtum A. DC) belongs to the Crassulaceae family, it has long been used in Mexican ethnobotanical as an anti-inflammatory and analgesic agent in the treatment of toothache, tonsillitis, for eyes diseases, sking and tisuue regeneratio... see more

B. Méndez-Argüello,I. Vera-Reyes,E. Mendoza-Mendoza,L. A. García-Cerda,B. A. Puente-Urbina,Ricardo Hugo Lira Saldívar

The applications that nanotechnology (NT) has on agriculture systems are diverse and promising because they have the potential to contribute in maintaining its productivity and efficiency by reducing costs and the quantity of synthetic agrochemicals emplo... see more

José de Jesús Ibarra Sánchez,Yolanda Preciado Rojas

The effect of stirring speed, temperature, feed rate of the reactants, and the solubility of the precursors in the size particle of the synthesis of magnetic nanoparticles (MNP) obtained by coprecipitation was investigated. MNPs size obtained was 7 to 15 ... see more

Gabriel González Domínguez,Jose Alfonso Hinojosa Cuéllar,Jorge Oliva Hernández,Glafiro Torres Hernández,José Candelario Segura Correa,Roberto González Garduño,Irma del Carmen García Osorio

To estimate genetic, non-genetic and environmental effects on the response variables birth weight (BW), adjusted weaning weight (AWW) and preweaning average daily gain (ADG) in Blackbelly lambs in Af(m) warm-humid climate, a retrospective observational st... see more

Rosa I. Ramírez-Chávez,José D. López-Martínez,Enrique Troyo-Diéguez,Miguel A. Gallegos-Robles,Cirilo Vázquez-Vázquez,José A. Ramírez Ibarra,José L. García-Hernández

Hot pepper (Capsicum annuum L.) is one of the main vegetable crops in Mexico. This because its great popularity among the population. Within this species, one of the cultivars that have more uses is the type “ancho”. Given the current scenario of economic... see more

Arturo Francisco Castellanos Ruelas

Legumes are a very important protein resource in tropical areas both for human and animal consumption. Among them, Canavalia ensiformis is used widely in many parts of the world. The most important inconvenience of the use of Canavalia is the content of a... see more

Cecilia Carolina Sabás-Chávez,Omar Franco Mora,Martín Rubí-Arriaga,Jesús Ricardo Sánchez-Pale,Álvaro Castañeda-Vildózola

Mexico is one of the centers of origin of the genus Vitis. Nowadays, in the germplasm bank of Zumpahuacán, México, there are growing more than 70 Vitis accessions; they are native of the States of México, Puebla and Morelos. It is known that for conservat... see more

Lilia Alcaraz-Meléndez

Graft compatibility of Jatropha curcas on Jatropha cinerea was confirmed by obtaining a high survival (95%) of the total grafted plants. Their regeneration and development was accomplished by histological assays observing compatibility of the vessel tissu... see more

Rafael Martínez Peláez,Yesica Imelda Saavedra Benítez,Pablo Velarde Alvarado,Jacek Pomykala

We propose a new dynamic ID-based remote user authentication scheme using smart cards, which it is based on one-way hash function, ElGamal’s public key cryptosystem and nonce. The scheme achieves the following security requirements: 1) users can choose an... see more

Carlos Arturo Rodríguez Alarcón,José Ángel Maciel Salas,Ramón Rivera Barreno,Hugo Salvador Staines Orozco,Jhon Didier Ruiz Buitrago,Carlos Andrés Hernández López,Diana Marcela Beristain-Ruiz

Introduction: Paediatric laparoscopic surgery provides new challenges for surgeons; therefore there is a need for adequate training before performing procedures directly on patients. Several different models were designed for training, including both virt... see more

Ricardo Orozco-Cruz,E. Mejía-Sánchez,R. Galván-Martínez

Introduction: The molten carbonate fuel cell operates at 650 ° C. Consist of a NiO porous lithiated cathode, an cast eutectic mixture of lithium carbonate  (Li2CO3) and potassium carbonate (K2CO3)in an electrolytic matrix of aluminum oxide lithi... see more

Lilia Salas-Pérez,José Antonio González-Fuentes,Mario García-Carrillo,Ernesto Sifuentes-Ibarra,Saúl Parra-Terrazas,Pablo Preciado-Rangel

The growing concern of the public about the negative effects of agricultural activities on the environment has caused that crop production; it is being more sustainable way; especially in the management of fertilization. About compost; it is an organic fe... see more

Valeria Martínez-López,Sandra Trinidad del Moral Ventura,Bernardo Sachman Ruiz,Laura Patricia Ramírez-Coutiño,María de Jesús García-Gómez

Introduction: Artisanal cheese produced from unpasteurized milk can harbor pathogens microorgaisms that can pose serious health risks of the consumers. However, wild starter cultures from artisanal cheeses can enhance the flavor of cheeses made from paste... see more

Diana Sánchez-Partida,Enrique Gabriel Baquela,Jaime Mora-Vargas,Neale R. Smith

Introduction: On occasions, Combinatorial Optimization Problems (COP), like the University Course Timetabling Problem (CTTP), can be solved using Operational Research (OR) techniques; however, when the problem increases in size, finding a solution becomes... see more

Alexander Mora Collazos

Introduction: The current study aimed to identify and characterize promissory microorganisms in bioremediation of waters contaminated with hexavalent chromium.Method: The isolation and purification of three bacterial isolates from a electroplating was ach... see more

Idalberto Tamayo Ávila,José Manuel Nieto Jalil,Jorge René Viteri Moya,Fausto René Ramos Aguirre

In this work the influence of two semiconductor layers Ethyl Vinyl Acetate (EVA) and carbon black on the formation and propagation of space charge in contact with the low density polyethylene (LDPE) at high electric field (100 kV/ mm) was studied. These l... see more

Anastacio Espejel-García,Ariadna Barrera-Rodríguez,Venancio Cuevas-Reyes

The objective was to analyze the dynamics of the use of livestock innovations and their impact on the earnings of the production system of family dairy in the Valle del Mezquital to contribute elements in decision-making and boost productivity of the syst... see more

Djamel Eddine Toudert

This assay focuses on examining the impact of isolation levels in the availability of Internet within specific contexts of analysis like the public or private support, the type and school level and the Mexican schools socioterritorial environments locatio... see more

Graciela Lara Gómez,Carla Carolina Pérez Hernández

The aim of this paper is to analyze the socio technological landscape between the Autonomous Communities (CC.AA) in Spain and examine their relationship with the cooperative dynamic. To this end, we developed a documental and empirical study related with ... see more

Aurora Irma Máynez Guaderrama,Judith Cavazos Arroyo,Leticia Valles Monge

Introduction: Lean manufacturing is a systematic approach that identifies and removes waste, through continuous improvement. A common activity in it, are kaizen events, which impact the technical and human subsystems of the organization, but unfortunately... see more

Norma Alicia Ordóñez Vázquez,Zuraya Monroy Nasr

Introduction: The experience of the family members who take the role of primary caregivers, in the process of a terminal illness such as cancer, provides information about the decision making at the end of life. The objective of this work was to know from... see more

Adolfo Benito Narváez Tijerina,Adrián Mireles Brito,Javier Cruz Camino

Introduction: In the article analyzes the use of ABM to study urban imaginaries. Is analyzed the role of urban imaginaries theory to understand the phenomena of identification between urban societies with iconic objects. Also studies the process of constr... see more

Lilia Betania Vázquez González,Manuel Roberto Parra Vázquez,María Amalia Gracia,Angélica Aremi Evangelista García,Eduardo Bello Baltazar,Erin Estrada Lugo

Introduction: Mexican Agriculture Policies for the last thirty years have been directed towards meeting the demands of international markets without considering the specific characteristics of local and regional farming systems, thereby interfering in the... see more

Gerardo Morales Jasso

The present article analyzes three meanings about “environment” and shows the ephistemic tensions implied by two of them. The goal is to propose the adoption of one of those meanings into the environmental sciences and with this, decrease the epistemic te... see more

Ana Lid Del Angel-Pérez,Bertha Sofía Larqué Saavedra,Jeremías Natarén Velázquez,María de Jesús Martínez Hernándes,Flavio Antonio Rodríguez Montalvo,Marcos Ventura Vázquez Hernández

Introduction. Corn is a staple cereal in Mexican food and the most cultivated by farmers. However, demand of corn for consumption and improved seed (IS), has led to strong imports, as in 2012, when 9'515,000 t were imported. A great deal of demand for IS ... see more

Pablo Alejandro Suárez Marrero,Miriam Esther Escudero Suástegui

In Cuba, most studies have focused religious music in the musical and dance expressions of AfroCuban rites that are intangible heritage of the nation. However, every time safeguarding the historical documentary heritage related to the practice of the Roma... see more

María Teresa Sánchez Medrano,José Adán Espuna Mújica,Rubén Salvador Roux Gutierrez

The usage of any material like structural element demands fundamentally the knowledge of its physical-mechanical properties, with the objective of knowing and take the maximum advantage of their properties and/or dismiss it if considered useless. This tex... see more