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Repositorio Institucional Caxcán: Envíos recientes

  • Interferometría holográfica digital (ihd) para la evaluación de variaciones de concentración en gasolinas comerciales 
    López Betancur, Daniela Paola (Universidad Autónoma de Zacatecas, 2016-08-08)
    La Interferometría Holográfica Digital (IHD), es una técnica óptica que permite comparar interferométricamente dos o más frentes de ondas provenientes de un mismo objeto, registrados en diferentes lapsos de tiempo o ...
  • Physical characterization of sunflower seeds dehydrated by using electromagnetic induction and low-pressure system 
    Ortiz Hernández, Arturo Agustín; Araiza Esquivel, María Auxiliadora; Delgadillo Ruíz, Lucía; Ortega Sígala, José Juan; Durán Muñoz, Héctor Antonio; Méndez García, Víctor Hugo; Yacaman, Miguel José; Vega Carrillo, Héctor René (Elservier, 2020-01-09)
    Drying is a widely used food preservation process in which water removal minimizes much of the moisture that causes deterioration reactions that impact the bioproduct quality. The objects of studying are high oleic sunflower ...
  • Simultaneous adsorption of quinoline and dibenzothiophene over Ni-based mesoporous materials at different Si/Al ratio 
    Alvarado Perea, Leo; Colín Luna, José Antonio; López Gaona, Alejandro; Wolff, Tanya; Pacheco Sosa, José Guadalupe; García Martínez, Julio César (Elsevier, 2019)
    In this study, two mesoporous materials such as MCM-41 and Ni/MCM-41 were modified with Al at different Si/Al ratios. The mesoporous materials were proved as sorbents of heterocyclic nitrogen and sulfur compounds employing ...
  • Zn supported on Zr modified mesoporous SBA-15 as sorbents of pollutant precursors contained in fossil fuels: Si/Zr ratio effect 
    Colín Luna, José Antonio; Zamora Rodea, G.E.; Medina Mendoza, Ana Karina; Alvarado Perea, Leo; Angeles Chávez, Carlos; Escobar, José; Pacheco Sosa, José Guadalupe; García Martínez, Julio César (Elsevier, 2019)
    The adsption processes have become an additional alternative to hydrotreatment processes of oilderived middle distillates. The crucial point is the type of adsorbent employed. SBA-15 mesoporous materials were used to ...
  • Light absorption properties of mesoporous barium hexaferrite, BaFe12O19 
    Bañuelos Frías, Alan; Martínez Guajardo, Gerardo; Alvarado Perea, Leo; Canizalez Dávalos, Lázaro; Ruiz, Facundo; Valero Luna, Claudia (Elsevier, 2019)
    Light absorption properties are one of the most important characteristics of semiconductor materials, since it is related to particle size, electric resistance, powder density, and dielectric constant. Barium hexaferrite ...
  • Influence of process parameters on single bed Ni/(Al)MCM-41 for the production of propene from ethene feedstock 
    Felischak, Matthias; Wolff, Tanya; Alvarado Perea, Leo; Seidel-Morgenstern, Andreas; Hamel, Christof (Elsevier, 2019)
    A Ni aluminized mesoporous MCM-41 catalyst was prepared and applied for the direct conversion of ethene to propene. Suitable ethene conversion and good selectivity for the desired molecule propene were achieved. The ...
  • Effect of Ni on MCM-41 in the Adsorption of Nitrogen and Sulfur Compounds to Obtain Ultra-Low-Sulfur Diesel 
    García Martínez, Julio César; González Uribe, Héctor Adrián; González Brambila, Margarita Mercedes; Flores del Río, N. G.; López Gaona, Alejandro; Alvarado Perea, Leo; Colín Luna, José Antonio (Springer, 2018)
    Adsorption of heterocyclic sulfur and nitrogen compounds like dibenzothiophene (DBT) and quinoline (Q), respectively, was carried out using mesostructured adsorbent MCM-41 and Ni/MCM-41 in calcined (C) and reduced (R) form. ...
  • Selective adsorption of nitrogen compounds using silica-based mesoporous materials as a pretreatment for deep hydrodesulfurization 
    García Martínez, Julio César; González Uribe, Héctor Adrián; González Brambila, Margarita; Colín Luna, José Antonio; Escobedo García, Y.E.; López Gaona, Alejandro; Alvarado Perea, Leo (Elsevier, 2018)
    The adsorption of quinoline (Q) and dibenzothiophene (DBT)—model compounds for nitrogen and sulfur in diesel fuels—over mesoporous SBA-15, SBA-16, and MCM-41 was studied. The Langmuir model was suitable for describing the ...
  • Una historia del magisterio en Zacatecas a finales del siglo XIX y principios del XX 
    Gutiérrez Hernández, Norma; Gutiérrez Hernández, Rosalinda; Gutiérrez Hernández, Juana María del Carmen (Universidad Autónoma de Tlaxcala, 2013-09-25)
    En Zacatecas como en el resto del país, a finales del siglo XIX y primeros años del XX, el gobierno tuvo una fe inquebrantable en la educación, en aras de modernizar a su sociedad y transitar al progreso, condición que se ...
  • 2-D Continuous Wavelet transform for ESPI phase-maps denoising 
    Escalante, Nivia; Villa Hernández, José de Jesús; De la Rosa Vargas, José Ismael; De la Rosa Miranda, Enrique; González Ramírez, Efrén; Gutiérrez, Osvaldo; Olvera Olvera, Carlos Alberto; Araiza Esquivel, María Auxiliadora (Elsevier, 2013-04)
    In thiswork we introduce a 2-D Continuous Wavelet Transform (2D CWT) method for denoising ESPI phase-maps. Multiresolution analysis with 2-D wavelets can provide high directional sensitivity and high anisotropy which are ...
  • Chlorophyll fluorescence emission as a response of pulsed light based-leds in tomato plants 
    Olvera González, Ernesto; Alaniz Lumbreras, Daniel; Ivanov, Rumen; Villa Hernández, José de Jesús; De la Rosa Vargas, José Ismael; López Cruz, Irineo; Silos Espino, Héctor; Lara Herrera, Alfredo (Springer, 2013-02)
    The effects of pulsed light based-LEDs at eleven frequencies (0.1, 1, 10, 50, 100, 500 Hz, 1, 5, 10, 50 and 100 kHz) programmed at 50 % duty cycle were analyzed, obtaining important parameters of the fluorescence emission ...
  • Semi-Huber potential function for image segmentation 
    Gutiérrez, Osvaldo; De la Rosa Vargas, José Ismael; Villa Hernández, José de Jesús; González Ramírez, Efrén; Escalante, Nivia (Osa Publishing, 2012-03)
    In this work, a novel model of Markov Random Field (MRF) is introduced. Such a model is based on a proposed Semi-Huber potential function and it is applied successfully to image segmentation in presence of noise. The main ...
  • A Statistical Inference Comparison for Measurement Estimation Using Stochastic Simulation Techniques 
    De la Rosa Vargas, José Ismael; Miramontes de León, Gerardo (IEEE Instrumentation and Measurement Society, 2008-10)
    The purpose of this paper is to present a comparison of different techniques for making statistical inference about a measurement system model. This comparison involves results when two main assumptions are made: 1) the ...
  • Radial basis functions for phase unwrapping 
    Villa Hernández, José de Jesús; De la Rosa Vargas, José Ismael; De la Rosa Miranda, Enrique (Instituto Politécnico NacionalUniversidad Nacional Autónoma de México, 2010-03)
    Un importante paso en el análisis de patrones de franjas es el llamado desenvolvimiento de fase. Aunque esta tarea puede ser realizada fácilmente usando algoritmos dependientes del camino, muchas veces, sin embargo, estos ...
  • A turn-on fluorescent solid-sensor for Hg(II) detection 
    De la Cruz Guzmán, Mayela; Aguilar Aguilar, Angelica; Hernandez Adame, Luis; Bañuelos Frías, Alan; Medellin Rodriguez, Francisco J; Palestino, Gabriela (Springer, 2014-08-26)
    A rhodamine organosilane derivative (Rh-UTES) has been obtained by one-pot synthesis. The chemical structure of Rh-UTES was confirmed by nuclear magnetic resonance (NMR) and infrared (FTIR) techniques. To obtain an ...
  • Analysis of the Influence of the Molecular Volume to Predict Experimental Pressure-Temperature Behavior in the Isotropic-Nematic Phase Transition of PAP, 5CB, MBBA and EBBA 
    García Sánchez, Eduardo; Mendoza Huizar, Luis H.; Ramírez García, Uriel; Sustaita, Ireri A.; Alvarado, Francisco (Springer, 2015-01-14)
    En este trabajo, nosotros analizamos el comportamiento experimental presión-temperatura pa la fase de transición Isotrópica-nemática de los cristales líquidos PAP, 5CB, MBBA, y EBBA a 1 atm usando el modelo HERSW Convex ...
  • Multichannel image storage improvement with some sensibility to color 
    Araiza, María del Refugio; Guel, Saron; Sifuentes, Claudia; De la Rosa Vargas, José Ismael; Miramontes de León, Gerardo (Sociedad Mexicana de Física, 2008-04)
    En este trabajo se presenta una mejora al método de almacenamiento de hologramas multicanales. Esto permite incrementar el número de operaciones de imágenes procesadas en la etapa de recuperación. Pero principalmente se ...
  • Comparación de cuatro algoritmos que dan solución numérica a la deconvolución en sistemas monodimensionales 
    De la Rosa Vargas, José Ismael; Miramontes de León, Gerardo; García Dominguez, Ernesto; Esquivel, María; Villa Hernández, José de Jesús (Instituto Politécnico NacionalUniversidad Nacional Autónoma de México, 2007-03)
    En el presente trabajo se presenta la comparación de un algoritmo de deconvolución con respecto de otros tres algoritmos clásicos utilizados para deconvolución unidimensional de señales. El algoritmo fue propuesto y analizado ...
  • N-dimensional regularized fringe direction-estimator 
    Villa Hernández, José de Jesús; Quiroga Mellado, Juan Antonio; Servín, Manuel; Estrada, Julio Cesar; De la Rosa Vargas, José Ismael (Osa Publishing, 2010-07)
    It has been demonstrated that the vectorial fringe-direction field is very important to demodulate fringe patterns without a dominant (or carrier) frequency. Unfortunately, the computation of this direction-filed is by far ...
  • Calibration of a greenhouse climate model using evolutionary algorithms 
    Guzmán Cruz, Rosario; Castaleda Miranda, Rodrigo; García Escalante, Juan José; López Cruz, Irineo; Lara Herrera, Alfredo; De la Rosa Vargas, José Ismael (Elsevier, 2009-07)
    This paper presents a comparison of different evolutionary algorithms (EAs), such as Genetic Algorithms (GAs), Evolutionary Strategies (ES) and Evolutionary Programming (EP) to calibrate parameters of a climate model that ...