Resultados de búsqueda - ("times" OR "time")

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    Dry Eye Disease Association with Computer Exposure Time Among Subjects with Computer Vision Syndrome por Sánchez Valerio, María del Rosario, Mohamed Noriega, Karim, Zamora Ginez, Irma, Báez Duarte, Blanca Guadalupe, Vallejo Ruíz, Veronica

    Publicado 2020
    “…Purpose: To assess the time of exposure to the computer and dry eye disease (DED) in subjects with computer vision syndrome (CVS).Methods: A cross-sectional study was conducted in office workers, computer users of both sexes, with an age range of 18– 45 years without comorbidities; we included 108 subjects divided into 3 groups according to the time of computer exposure in hours per day (H/D): < 4 (n = 23), 4 − 7.9 (n = 49), > 8 (n = 39). …”
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    Artículo
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    A Real-Time SOSM Super-Twisting Technique for a Compound DC Motor Velocity Controller por Morfin, Onofre A., Castañeda, Carlos E., Valderrabano González, Antonio, Hernandez González, Miguel, Valenzuela, Fredy A.

    Publicado 2017
    “…bstract: In this paper, a real-time robust closed-loop control scheme for controlling the velocity of a Direct Current (DC) motor in a compound connection is proposed. …”
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    Artículo
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    MTT Vs WST-1, efficiency, cost, time, and waste generation: evaluating the silver nanoparticles cytotoxicity por López, Israel, Balderas-Rentería, Isaías, Gómez, Idalia, González-Santiago, Omar, González-Barranco, Patricia, Garza-Ocañas, Lourdes, Ramírez-Cabrera, Mónica A

    Publicado 2020
    “…Talking about the analysis cost, the WST-1 assay economical cost was 3.4 times higher than the MTT assay. On the other hand, the MTT assay required was 2.5 h slower and produced more than three times of the waste volume than the WST-1 assay.…”
    Enlace del recurso
    Artículo
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    Short-term Effects of Air Pollution on Health in the Metropolitan Area of Guadalajara using a Time-series Approach por Cerón Bretón, Rosa María, Cerón Bretón, Julia Griselda, Lara Severino, Reyna del Carmen, Espinosa Fuentes, María de la Luz, Ramírez Lara, Evangelina, Rangel Marrón, Marcela, Rodríguez Guzmán, Abril, Uc Chi, Martha Patricia

    Publicado 2018
    “…ABSTRACT This work have like purpose quantitative estimates of the short-term effects of air pollution on the health of residents of five municipalities of the Metropolitan Area of Guadalajara, Mexico from 2012 to 2015 using time-series approach. Air Quality was assessed for CO, NO2, SO2, O3 and PM10. …”
    Enlace del recurso
    Artículo
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    New Algorithm Based on Sign Decomposition to Verify the Robust Stability Property for a Class of Linear Time-Delay Systems por Díaz Rodríguez, Iván D., Romero, Gerardo, Elizondo, Cesar

    Publicado 2015
    “…The main focus of this paper is to analyze the robust stability property for a class of time-delay systems when parametric polynomic uncertainty is considered. …”
    Enlace del recurso
    Artículo
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    Hypothesis test for changes in variance using a statistic based in P-values in a time series of normal independent observations. por Armendáriz Hernández, Samuel Uriel

    Publicado 2015
    “…The power of the test was simulated using Monte Carlo simulation, and the results were compared with the Chen test (1997) to prove its efficiency. Time series analysts might find the test useful to address homoscedasticity studies were at most one change might be involved.…”
    Enlace del recurso
    Tesis
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    Hypothesis test for changes in variance using a statistic based in P-values in a time series of normal independent observations. por Armendáriz Hernández, Samuel Uriel

    Publicado 2015
    “…The power of the test was simulated using Monte Carlo simulation, and the results were compared with the Chen test (1997) to prove its efficiency. Time series analysts might find the test useful to address homoscedasticity studies were at most one change might be involved.…”
    Enlace del recurso
    Tesis
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