35 articles in this issue
Luis Humberto Rodríguez Alfaro,Efraín Alcorta-García
The generalized Hamiltonian representation of systems gives structural advantages that can be used in many areas. Some of these are the design of nonlinear observer and model-based fault diagnosis. Many works have as start point the generalized Hamiltonia... see more
Juan Manuel Belman Flores,J.L. Rodríguez-Muñoz
This article presents as a contribution, the development of an evaporator modelling which is part of a diffusion-absorption refrigeration system of small volumetric capacity (frigobar). The model is based on physical principles and empirical correlations,... see more
José C. López O.,Luz M. Hernández-Calva,Meng Qi,Tim McAllister
Ferulic acid esterases are capable of releasing phenolic compounds of the plant cell wall, increasing access to polysaccharides. In vitro determinations were performed in order to estimate the potential for ferulic acid esterase (Fae1A) isolated from rume... see more
U. Filobello-Nino,Héctor Vázquez Leal,Brahim Benhammouda,A. Pérez-Sesma,J. Cervantes-Pérez,V.M. Jiménez-Fernández,A. Díaz-Sánchez,A. Herrera-May,D. Pereyra-Díaz,A. Marín-Hernández,J. Huerta-Chua
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M. Elias-Espinosa,Jorge Zuno Silva,M. Ortiz-Domínguez,J. Hernández-Ávila,O. Damián-Mejía
In the present study, a mathematical model was proposed for analyzing the growth of Fe B2 layers formed on AISI 1026 steel by the pack-boriding process. This model was based on solving the mass balance equations of the ( Fe B/Fe 2 ) interface to evaluate ... see more
Luis Cisneros Villalobos,Outmane Oubram,M. Limón-Mendoza,F. Aquino-Roblero,L. Díaz-González,M. Tecpoyotl-Torres,C. I. Montaño-Bautista
This research presents the simulation of generated overvoltages during a maintenance maneuver off of a static reactive power compensator of 230 kV. The malfunction of the main circuit breaker causes a catastrophic failure including the explosion and fire ... see more
W. Gaona-Romero,Esaú Escobar-Juárez,Jorge Hermosillo-Valadez,Bruno Lara-Guzmán
In mobile robotics, using artificial vision, one is capable of estimating distance to objects in the environment by means of a camera model. This estimation consists in the calculation of a numerical value based on a number of camera parameters and geomet... see more
Diego Seuret Jiménez,P. Stahl,O. Terminel
It is intended to validate, two examples, the use of the wavelet transform to detect mechanical failures. The first, a gear with a broken tooth is subjected to a rotation testing machine, where the vibration signals are extracted by means of a network of ... see more
Héctor Osbaldo Rubio Arias,Lourdes Raquel Balderrama Terrazas,Eduviges Burrola Barraza,Guadalupe Nelson Aguilar Palma,Rubén Alfonso Saucedo Terán
Introduction: Water is esential for life and, for this reason, it is considered as the most important natural resource to earth. The objective of this research was to evaluate the quality of drinking water used for the Ascension’s inhabitants in Chihuahua... see more
Juan Prisciliano Zárate Martínez,Jorge Víctor Rosete Fernández,Ángel Ríos Utrera,Francisco Tobías Barradas Piña
Introduction: Reproduction of cattle is affected by several infectious deseases, among which leptospirosis, brucellosis, campylobacteriosis, bovine viral diarrhea, and infectious bovine rhinotracheitis are found. These infectious deseases cause economic l... see more
Norma Patricia Puente Ramirez,L. M. Torres-Treviño,J. E. Sánchez-Cantú
The appearance of pores of the skin is normally caused by overactive sebaceous glands, however, in recent years it has been reported that in addition is affected by various diseases including diabetes[1], obesity [2] or cancer [3]. Generally the main fact... see more
Rosa Amelia Alcántar Ruiz,Francisco Edmundo Treviño Treviño,José Luis Martínez Flores
This paper proposes a statistical multiple linear regression model for decision-making on fuel efficiency with application to the motor carrier industry in Mexico considering the factors with the greatest impact on consumption. The model has applied stati... see more
Aidee Manriquez Ávila,Miriam Lucía Rocha Navarro,Carlos Daniel Rivas Bejar,Texar Alfonso Pereyra Novara
Introduction: The local anaesthesia is one of the procedures most used in practice surgical. In the tooth extraction, it is used to produce analgesic and anaesthetic effects. However, there is controversy about safety on having applied a local anaesthetic... see more
José Rodríguez Rodríguez
Reduction and/or exploitation of byproducts from the extraction and refining industry of vegetable oils is a current need. One of these, known as Soybean Oil Deodorizer Distillate (SODD), has a potential value in the food and pharmaceutical industries by ... see more
Hans Hernández Cabanas,José A. Otero,Guillermo Monsivais,Reinaldo Rodríguez-Ramos
Composites are vital to humans since the earliest time; today the use of these materials has proliferated in the industry due to the presence of physical properties not present in any of its components separately. One of the problems facing modern science... see more
Miguel Gastón Cedillo-Campos,Albalicia Martínez-Hernández,Juan Carlos Villa-Araujo,Mario Cantu-Sifuentes
Introduction: Service is now a key element for the economic growth of modern nations. Under a dynamic global competition environment, to increase service capabilities in the supply chains has become even more vital. For companies operating in emerging mar... see more
Luis Cisneros Villalobos,F. Aquino-Roblero,M. Tecpoyotl-Torres,J. Chillopa-Linares,D. Martínez-Martínez
In this article is analyzed an urban distribution network of 23 kV typical of the central zone of Mexico. The objective is to determine the maximum spacing of surge arresters on the line that allows reducing the outages of the distribution circuit due to ... see more
Andrés García Floriano,Oscar Camacho Nieto,Cornelio Yáñez Márquez
In this work, a new pattern classification model, working in supervised mode, is presented. The design and operation of this model is based on the Heaviside function. Also, this Heaviside Classifier is of the one-shot kind, which guarantees that the new m... see more
A. Alejandro-Lázaro,Alfonso Azpeitia Morales,L. Sáenz-Carbonell,F. Mirafuentes Hernández
Somatic embryogenesis applied for clonal propagation of cocoa plants efficiency is still low, so that the objective of this investigation was to assess the response of the cotyledons from primary somatic embryos as explant source to induce somatic embryog... see more
Ervin Jesús Alvarez Sánchez,Francisco Javier Portilla Hernández,Andrés López Velázquez,Rosario Aldana Franco
In this paper a simplified mathematical model for a bag opener mechanical system is obtained. This model can be used for ilustrate the knowledge adquired during the dynamics of mechanisms course, such as: particle dynamic equilibrium, projectil motion and... see more
José Alberto Briones Torres,Isaac Rodri´guez-Vargas
We used the transfer-matrix method to study the tunneling of Dirac eletrons through graphene superlattices. We have considered two types of sinusoidal superlattices: (1) electrostatic-barrier structures created by application of electrostatic potentials a... see more
Idalberto Tamayo Ávila,José Manuel Nieto Jalil,Jorge Viteri Moya,Gloria María Eloisa Roldan Reascos,Ana Violeta Argüello Mejía
In this work results that demonstrate the formation of space charge in low density polyethylene, LDPE, caused by humidity absorption are obtained. It was shown that at higher exposure times of the samples to humidity, increases the charge accumulated at t... see more
Enrique Leonardo Kato Vidal
The purpose of this paper is to distinguish between the corporate necessity of investing to create value and the discretion exercised to postpone investing because of higher uncertainty. The theory holds that investment is positively related to profitabil... see more
Marina Inés De la Torre Vázquez
Traditionally public spaces have been conceived as part of public realm which have common uses due to its ease of access, ease social interactions strengthen sense of community belonging and social identity encourage. However, the evolving communication, ... see more
María Lourdes Guevara Romero,María Blanca Rosa Téllez Morales,María De Lourdes Flores Lucero
The life of every individual is given specific spaces in a natural environment with which it will interact. The form of ownership and use of their environment has certain specific features that address beliefs, individual and shared practices that run and... see more
Silverio Hernández Moreno
This paper discusses the results of a comparative life cycle analysis of three types of luminaries commonly used today in artificial lighting of architectural and indoors buildings; comparing the environmental impacts to know how much quantitatively contr... see more
Felipe Moreno Yebra
To obtain resources to achieve a public spending is perhaps the most important activity that the State has to accomplish. Only in this way it is possible to sustain spending on infrastructure, social assistance, education, culture, national security, etc.... see more
Nemesio Osorio-García,Higinio López-Sánchez,Benito Ramírez Valverde,Abel Gil-Muñoz,Nicolás Gutiérrez-Rangel
The main activity of peasants of Puebla Valley is maize production, however, they do other agricultural and no agricultural activities to satisfy their family needs. The objective of this research was to analyze the current situation of maize production a... see more
Pablo del Monte-Luna,Sergio Antonio Guzmán del Próo,Víctor Hugo Cruz-Escalona
Introduction: Any science practitioner is constantly exposed to public speaking (PS) situations: conferences, congresses, symposia, workshops, etc.; thus it is essential to communicate our ideas in a clear and convincing manner during an oral presentation... see more
Pablo Castro Domingo
This article discusses practices that have recreated the indigenous mexiquenses in recent years. It shows how Mazahuas, Otomi, Nahua, Tlahuica and Matlazinca from The State of Mexico are embedded in large-scale migration processes that connect geographica... see more
Yasiri Mayeli Flores-Monter,F. Aceves-Quesada,A. García-Romero,E.M. Peters Recagno
Introduction: The Mexican coast offers a suitable habitat for the breeding and sheltering of turtles. However, its attributes on the Chalacatepec coast, in Jalisco, this ability may be threatened by the construction and operation of the Development Vistas... see more
Teresa Turiján Altamirano,Benito Ramírez Valverde,Miguel Ángel Damián Huato,José Pedro Juárez Sánchez,Néstor Estrella Chulím
The destination of remittances varies according to the needs of recipient households, although generally used in living expenses, and lower percentages are used for other items such as savings, educational expenses, improvements, expansion or construction... see more
María Del Carmen Torres
Introduction: The impacts of global warming and climate change are a concern in virtually all sectors of society, because of the consequences we perceive and affect more and more all natural systems and created by man, usually in a negative way. To revers... see more
Rolando Pérez Álvarez