• En defensa de Dios 

  Miramontes de León, Gerardo (Universidad Autónoma de Zacatecas, 2022-09-10)

  ¿Dios necesita quien lo defienda? ¿Es necesario inventar milagros? En este texto, se propone una metáfora de un dios, no el de las escrituras, en una fórmula que contiene lo infinitamente pequeño y lo infinitamente grande ...
• Memorias de un profesor para ingenieros 

  Miramontes de León, Gerardo (Universidad Autónoma de Zacatecas, 2021-05-30)

  Sin pretender ser protagonista, quizá los años, las circunstancias, o qué sé yo, me han convencido escribir estas memorias para compartir una versión sobre los pasos vacilantes de un profesor común, a veces criticado, y ...
• 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 ...
• Alternative sampling functions for single-pixel imaging with a digital micromirror device 

  Burnes Rudecino, Susana; Martínez León, Lluís; Clemente, Pere; Araiza Esquivel, María Auxiliadora; Tajahuerce Romera, Enrique (SPIE OPTO, 2019, 2019-03-04)

  Single-pixel imaging employs structured illumination to record images with very simple light detectors. It can be an alternative to conventional imaging in certain applications such as imaging with radiation in exotic ...
• High sampling rate single-pixel digital holography system employing a DMD and encoder phase-encoded patterns 

  González Hernández, Humberto; Martínez León, Lluís; Soldevila, Fernando ; Araiza Esquivel, María Auxiliadora; Lancis, Jesús; Tajahuerce Romera, Enrique (Osa Publishing, 2018-07-25)

  A single-pixel digital holography system with phase-encoded illumination using a digital micromirror device (DMD) as a spatial light modulator (SLM) is presented. The enhanced switching rate of DMDs, far exceeding the ...
• Phase Unwrapping using Chebyshev Polynomials 

  De la Rosa Miranda, Enrique; González Ramírez, Efrén; Arceo Olague, José Guadalupe; Villa Hernández, José de Jesús; De la Rosa Vargas, José Ismael; Saucedo Anaya, Tonatiuh; Berriel Valdos, Luis Raúl; Escalante, Nivia (SPIE- The International Society for Optical Engineering, 2013-11-18)

  Phase unwrapping is an intermediate step for interferogram analysis. The phase associated with an interferogram can be estimated using a curve mesh of functions. Each of these functions can be approximated by a linear ...
• Phase unwrapping using a regular mesh grid 

  Berriel Valdos, Luis Raúl; Olvera Olvera, Carlos Alberto; Arceo Olague, José Guadalupe; De la Rosa Miranda, Enrique; González Ramírez, Efrén; Saucedo Anaya, Tonatiuh; Villa Hernández, José de Jesús; De la Rosa Vargas, José Ismael (Universities of Vigo and Santiago de Compostela, 2014)

  Phase unwrapping is a key step in the fringe pattern analysis. Although there are many algorithms for recovering continuous phase from wrapped phase maps, many of them are computationaly heavy, even for smooth phase maps. ...
• Extraneous cognitive overload in the blended learning paradigm. Case study: Use of social networks in computer science courses 

  Martínez Ruíz, Francisco Javier; Godina Gonzalez; Borrego Elías, Ana Lourdes; Gamboa Rosales, Hamurabi; De la Rosa Vargas, José Ismael (International Academy of Technology, Education and Development (IATED), 2016-11-16)

  Social networks are becoming a standard way for sharing and collaborating between students and professors. Currently, our Class Website is not the primary source of information and materials. Professors are using a ...
• Chlorophyll fluorescence emission of tomato plants as a response to pulsed light based LEDs 

  Olvera González, Ernesto; Alaniz Lumbreras, Daniel; Ivanov, Rumen; Villa Hernández, José de Jesús; De la Rosa Vargas, José Ismael; Lépez Cruz, Irineo; Silos Espino, Héctor; Lara Herrera, Alfredo (Springer, 2013)

  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 ...
• Foucault test: shadowgram modeling from the physical theory for quantitative evaluations 

  Villa Hernández, José de Jesús; Rodríguez, Gustavo; De la Rosa Vargas, José Ismael; Ivanov, Rumen; Saucedo Anaya, Tonatiuh; González Ramírez, Efrén (OSA Publishing, 2014-12)

  The physical theory of the Foucault test has been investigated to represent the complex amplitude and irradiance of the shadowgram in terms of the wavefront error; however, most of the studies have limited the treatment ...
• Regularized quadratic cost function for oriented fringe-pattern filtering 

  Villa Hernández, José de Jesús; Quiroga Mellado, Juan Antonio; De la Rosa Vargas, José Ismael (OSA Publishing, 2009-06-01)

  We use the regularization theory in a Bayesian framework to derive a quadratic cost function for denoising fringe patterns. As prior constraints for the regularization problem, we propose a Markov random field model that ...
• Improved regularized phase-tracking technique for the processing of squared-grating deflectograms 

  Villa Hernández, José de Jesús; Quiroga Mellado, Juan Antonio; Servin Guirado, Manuel (OSA Publishing, 2000-02)

  We propose a robust procedure based on the regularized phase-tracking (RPT) technique to demodulate squared-grating deflectograms. The use of squared gratings, already reported, lets us multiplex the information of the ...
• Robust profilometer for the measurement of 3-D object shapes based on a regularized phase tracker 

  Villa Hernández, José de Jesús; Servin Guirado, Manuel (Elsevier, 1999-07)

  A robust pro"lometer is proposed to measure 3-D object shapes based on a regularized phase tracker that is capable of demodulating fringe patterns with a high noise presence and broad bandwidth due to the object shape. ...
• Wavefront recovery in shearing interferometry with variable magnitude and direction shear 

  Villa Hernández, José de Jesús; García, G.; Gómez, G. (Elsevier, 2001-08)

  We propose a regularization method for estimating the wavefront from shearing interferometric patterns generated in vectorial shearing interferometry. The method considers shearing patterns with variable magnitude and ...
• Synchronous detection technique for temporal fringe pattern analysis 

  Villa Hernández, José de Jesús; Gómez Pédrero, José Antonio; Quiroga Mellado, Juan Antonio (Elsevier, 2002-04-01)

  An alternative method for temporal evaluation of fringe patterns is proposed. The method is based on the application of a synchronous detection system for processing the temporal irradiance fluctuations generated when the ...
• Profilometry for the measurement of 3-D object shapes based on regularized filters 

  Villa Hernández, José de Jesús; Servin Guirado, Manuel; Castillo, L. (Elsevier, 1999-03-01)

  Regularized filters RFs. are used in profilometry for the measurement of three-dimensional object shapes. A linear grating pattern projected onto an object is phase-modulated by the 3-D shape. Phase information of the ...
• Automatic techniques for evaluation of moire deflectograms 

  Quiroga Mellado, Juan Antonio; Villa Hernández, José de Jesús; Crespo, Daniel (SPIE--The International Society for Optical Engineering., 2013-10)

  In this work we present two methods for the analysis of moire deflectograms. The first method is a Fourier-transform technique. The second method uses a regularization based method. Both methods are applied to realistic ...
• Análisis temporal de imágenes de franjas en técnicas ópticas de medición 

  Villa Hernández, José de Jesús; Gómez Pédrero, José; Quiroga Mellado, Juan Alberto (Universidad Autónoma de Zacatecas, 2004-03-05)

  El análisis de imágenes franjas, que es de fundamental importancia en una gran cantidad de métodos ópticos de medición, en muchas ocasiones puede presentar dificultades como puede ser la presencia de altos niveles de ruido, ...
• Estudio estadístico del potencial eólico del Cerro de la Virgen en Zacatecas, México 

  Jaramillo Martínez, Ramón; Reta Hernández, Manuel; de la Torre y Ramos, Jorge (Instituto Tecnológico de Celaya, 2014-10)

  La capacidad instalada de energía en eólica en México, a finales del 2013, es de 1,917 MW, distribuida en 26 parques en 6 estados, donde Oaxaca representa más del 90% de capacidad instalada. En el presente trabajo se ...
• Study for Wind Generation and CO2 Emission Reduction Applied to Street Lighting – Zacatecas, México 

  Bañuelos Ruedas, Francisco; Ángeles Camacho, César; Romo Guzmán, Guillermo; Reta Hernández, Manuel (InTech, 2013-03-20)

  The widespread concern in developed and developing countries to generate clean and sus‐ tainable energy, has led to search for alternative sources for non polluting power generation such as wind power. Although electric ...

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