20 articles in this issue
Rafael Jordán Hernández
The zeolite is an abundant mineral resource in the State of Sonora whose quality converts it in an important corrective factor of the deteriorated soils of cultivation of the State. The agriculture of Sonora in the last years has lost agricultural lands f... see more
Idalberto Tamayo Ávila,José Manuel Nieto Jalil,Jorge Viteri,Juan Belana,José Antonio Diego
Three experimental mid-voltage cables ,C2,C3 and C4 with cross-linked polyethylene (XLPE) isolation, rated respectively as Medium, High and Low in perforation tests over 150KV , are studied. All these cables have been systematically measured by Electroaco... see more
Rubén Darío Martínez Rojero,Glafiro Torres Hernández,Santiago Martínez Hernández
A study was carry out to characterize the phenotypic, productive and reproductive traits of the white Creole goat of the “Filo Mayor” from the Sierra Madre del Sur in the Guerrero State, Mexico ((17º 39´N and 99º 50´W). White and bay or cream coats were t... see more
Sergio Ivván Valdez Peña,Arturo Hernández Aguirre,Salvador Botello Rionda,Eusebio E. Hernández-Martínez
The problem of synthesis of mechanisms is to find the adequate dimensions in the elements in order to perform a given task. The task is defined by a set of points named: precision points. The problem is defined as minimizing the distance among the precisi... see more
Tonatiuh Saucedo Anaya,Felipe Puch Ceballos
An arrangement in Digital Holographic Interferometry (DHI) is presented for simultaneously 2D measuring micro deformations in the surface of optically rough objects. For this arrangement a 3CCD color camera and two laser sources 458nm and 633nm were used,... see more
Alejandro Iturri Hinojosa,Alexander E. Martynyuk,José Luis López Bonilla
A design of a multilayer RADANT -type antenna based on PIN diodes for the X band is presented. The geometry of cells that conforms the grids and the scanning responses in E and H planes of a 3-bit multilayered antenna are obtained. A designed pair of grid... see more
B. Guevara Cortés,J. López Bonilla,S. Vidal Beltrán
This paper is a study through simulations about overvoltages generated by lightning induced on the distribution lines of 23 kV, to justify the implementation of an overhead ground wire use as protection for overhead distribution lines, as suggests the sta... see more
J. Zuno-Silva,A. Bedolla-Jacuinde,J.M. Martínez-Vázquez,A. Pérez-Perez,T. Quintero-Azuara
The refractory degradation on induction furnace walls at different points was studied. A SiO2 (98.8%) base refractory was analyzed with two different slag chemical composition through crucible and dipping laboratory degradation test and also applying an a... see more
R. A. Reyes-Villagrana,D. A. Contreras-Solorio
The acoustics is interpreted as the science that studies sound waves, vibrations and their interactions with the environment, in both macroscopic and microscopic systems. This paper presents the model of piezoelectric acoustic detector developed with the ... see more
Lorena Díaz-González,René Cruz-Huicochea
Our aim is to show a statistical procedure along with two new computer programs (DODESSYS and UDASYS). For this task we compiled a database of 249 samples of dacite coming from four closely located Mexican Volcanic Belt (MVB) areas: monogenetic volcanoes ... see more
Jorge Acevedo Alarid,Mónica Colin Salgado,Gilda Rosa Bolaños Evia
This research seeks to analyze the operation and management of urban facilities in the municipality of Leon, Guanajuato. The study is a measure of performance from the standpoint of public policy, conceived as the systematic application of social research... see more
Miguel Angel Hernández-Apam,Jorge Albeto Durán-Encalada,Carlos Arturo Vega-Lebrún,Elías Olivares-Benítez
The complexity of managing supply chains has meant that many organizations do not have all the resources and capabilities to achieve the necessary changes. Therefore, this study sets up some questions related to the presence of logistics services provider... see more
Mireya Alicia Rosas Lusett,Víctor M. García Izaguirre
The suburb of social interest Elias Piña located in Tampico, México in a warm humid climate, with an annual average temperature in summer of 28.3ºC, in winter of 20.5ºC and an annual average of moisture of 78%, this consists of small houses and buildings ... see more
Guillermo Díaz
This article analyzes the relationship between capital allocation and local development in four municipalities of the region east of Guatemala. The four municipalities analyzed share the characteristic of having experienced a significant reduction in pove... see more
Gabriel Gómez Carmona,Alberto Javier Villar Calvo
All changes seen in the city in the last decades have led to a wide number of studies from fields like sociology, anthropology and environmental psychology. Specifically, researches on the analysis of the social implications of such changes allow us to un... see more
Adriana Carro Olvera,Felipe Hernández Hernández,Alfonso Lima Gutiérrez,Ma. Elza Carrasco Lozano,Efrén Ramírez
The inequality in basic education in Mexico is a latent problem, despite the universalizing education policies undertaken for decades, educational opportunities are not the same for all children and adolescents. Elements such as family cultural capital, s... see more
Yolanda Guadalupe Aranda-Jiménez,Edgardo Jonathan Suárez-Domínguez
Earth architecture is known for centuries, however, is rarely used today compared to common construction systems. Compressed earth blocks (BTC) are structural elements with a high potential to be used in housing construction in Mexico, mainly by its simil... see more
Irasema Linares Medina,Sergio Ochoa Jiménez,Beatriz Ochoa Silva
The object to the study is make the diagnosis of organizational culture in a Public Higher Education Institution, to identify the cultural elements that facilitate or hinder the process of performance evaluation of academic staff.The study was made throug... see more
Carlos Encinas-Ferrer
Oligopoly and oligopsony have been studied extensively. However, the dual figure of the oligopsonistic-oligopolistic intermediary has not been. This dual personality has a double negative impact on the market, on one hand reduces the demand to producers w... see more
Rolando Pérez Álvarez
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