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José P. Vega-Camarena, Luis Brito-Castillo, Luis F. Pineda-Martínez and Luis M. Farfán
In the warm season, El Niño/Southern Oscillation (ENSO) causes periods with more rain in Northern Mexico during its positive phase, while less rainfall is recorded in the southern regions during the negative phase. This research study evaluates the varia...
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Alex Elías-Zúñiga, Luis M. Palacios-Pineda, Daniel Olvera-Trejo and Oscar Martínez-Romero
The aim of this paper focuses on finding equivalent representation forms of forced, damped, two degree-of-freedom, nonlinear systems in the sense of Lyapunov by using a nonlinear transformation approach that provides decoupled, forced, damped, nonlinear ...
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Carlos Armando Cuevas Vallejo,Miguel Delgado Pineda,Magally Martínez Reyes,Centro Universitario UAEM Valle de Chalc o, Universidad Nacional de Educación a Distancia- España, Centro de Investigación y de Estudios Avanzados del I.P.N. - México
Pág. 20 - 38
ResumenEl artículo muestra que un factor importante en el fracaso de los estudiantes en el primer curso de cálculo diferencial, es la carencia del concepto de función. Esto no es sorprendente puesto que diversos reportes de investigación muestran la comp...
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Luis F. Pineda-Martínez,Noel Carbajal
Pág. 233 - 242
The climate regions of Mexico are delimitated using hierarchical clustering analysis (HCA). The data used consists of monthly means of maximum and minimum temperatures and monthly-accumulated precipitation. The dataset was obtained from heterogeneously d...
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Gerardo L. Arzate-Vázquez, Francisco A. Castrejón-Pineda, René Rosiles-Martínez, Silvino Carrillo-Pita, Sergio Angeles-Campos, Einar Vargas-Bello-Pérez
Pág. 476 - 485
In tropical production systems, dairy cows are rarely supplemented with minerals, which often lead to mineral imbalances. Grasses grown together in the same soil type and sampled at the same growth stage can vary widely in chemical and mineral compositio...
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Elia Cruz-Crespo, María T. Sumaya-Martínez, Álvaro Can-Chulim, Joel Pineda-Pineda, Rubén Bugarín-Montoya, Gisela Aguilar-Benítez
Pág. 375 - 384
The concentration of antioxidant compounds, the antioxidant activity, physical quality characteristics, and the yield of serrano chilies (Capsicum annuum L.) are affected by agricultural practices, such as the use of vermicompost in containers combined w...
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Luis F. Pineda-Martínez,Noel Carbajal,Arturo Campos-Ramos,Antonio Aragón-Piña,Agustin R. Garcia
Atmospheric pollution in urban areas of Mexico has become a serious problem. The study of spatio-temporal evolution of concentrations of particulate matter is an important issue. A total of 188 samples were randomly collected at 24-hour running time with...
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L. PINEDA MARTÍNEZ,N. CARBAJAL,E. MEDINA ROLDÁN
Applying principal component analysis (PCA), we determined climate zones in a topographic gradient in the central-northeastern part of México. We employed nearly 30 years of monthly temperature and precipitation data at 173 meteorological stations. Th...
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María C. Martínez Pineda
Pág. 5 - 11
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