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    Thermomechanical Performance of fr-4 Laminates in the Manufacturing Process of Printed Circuit Boards. by Rodríguez Vázquez, Carlos Alfonso

    Published 2016
    “…In 2006 the Restriction of Hazardous Substances (RoHS) prohibited the use of lead (Pb) in solder paste, which has a melting temperature around 180oC, whereas lead-free solder pastes have a melting point around 230oC, 30oC-40oC higher than Pb solder paste, this has generated PCB thermo mechanical problems due to the temperature increase at which the material is exposed. …”
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  2. 42

    Thermomechanical Performance of fr-4 Laminates in the Manufacturing Process of Printed Circuit Boards. by Rodríguez Vázquez, Carlos Alfonso

    Published 2016
    “…In 2006 the Restriction of Hazardous Substances (RoHS) prohibited the use of lead (Pb) in solder paste, which has a melting temperature around 180oC, whereas lead-free solder pastes have a melting point around 230oC, 30oC-40oC higher than Pb solder paste, this has generated PCB thermo mechanical problems due to the temperature increase at which the material is exposed. …”
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    Tesis
  3. 43

    DISEÑO Y VALIDACIÓN DE UNA ESCALA DE APRENDIZAJE SOBRE SALUD COLECTIVA EN ENFERMERÍA by García Piña, Eunice Victoria

    Published 2017
    “…Results: An instrument of 40 items was obtained, which considers five dimensions of learning: genuine (8 to 40 points), meaningful, and reflective (7 to 35 points), experimental -multidimensional (9 to 45 points), self-employed (6 to 30points) and set (10 to 50 points), derivative in a total a score of 40 to 200 points. …”
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    Article
  4. 44

    Resiliencia en el uso de las aplicaciones didácticas interactivas en Estudiantes Universitarios después de la pandemia. Estudio Comparativo by Pérez-Martínez, Katia Site, Saldaña-Pérez, Juan Enrique, Mendoza-Vargas, Marta Magdalena

    Published 2024
    “…A ambos grupos se les aplico la encuesta llamada: “Escala de Aplicaciones Didácticas Interactivas”, la cual está integrada por 10 ítems de tipo Likert. La primera muestra fue tomada en el año 2018, y la segunda en el año 2023, esto permitió contrastar la diferencia entre sus respuestas, ya que en la primera, la aplicación de Power Point resulto ser la de mayor conocimiento y uso por los estudiantes, sin embargo, después de la pandemia, los estudiantes mostraron una mayor variabilidad ante el uso de las diversas aplicaciones didácticas interactivas, aunque si bien, refieren usar ahora más de una, Power Point sigue siendo la de mayor conocimiento.  …”
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    Artificial neural network modeling of phenol adsorption onto barley husks activated carbon in an airlift reactor by Loredo Cancino, Margarita

    Published 2013
    “…Purpose and method of the study: The production of activated carbon from barley husks (BH) by chemical activation with zinc chloride was optimized by using a 23 factorial design with replicates at the central point, followed by a central composite design with two responses (the yield and iodine number) and three factors (the activation temperature, activation time, and impregnation ratio). …”
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  8. 48

    Artificial neural network modeling of phenol adsorption onto barley husks activated carbon in an airlift reactor by Loredo Cancino, Margarita

    Published 2013
    “…Purpose and method of the study: The production of activated carbon from barley husks (BH) by chemical activation with zinc chloride was optimized by using a 23 factorial design with replicates at the central point, followed by a central composite design with two responses (the yield and iodine number) and three factors (the activation temperature, activation time, and impregnation ratio). …”
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    Tesis
  9. 49

    Artificial neural network modeling of phenol adsorption onto barley husks activated carbon in an airlift reactor by Margarita Loredo-Cancino

    Published 2013
    “…Purpose and method of the study: The production of activated carbon from barley husks (BH) by chemical activation with zinc chloride was optimized by using a 23 factorial design with replicates at the central point, followed by a central composite design with two responses (the yield and iodine number) and three factors (the activation temperature, activation time, and impregnation ratio). …”
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    info:eu-repo/semantics/doctoralThesis
  10. 50

    HEMOGLOBINA GLUCOSILADA: PRUEBA DE LABORATORIO NECESARIA PARA EL CONTROL METABOLICO DE PACIENTES MEXICANOS CON DIABETES MELLITUS TIPO 2. by Cerda-Flores, Ricardo M., Rojas-Alvarado, Ma de los Angeles, Dávila-Rodríguez, Martha I., González Quiroga, Guillermo, Cortés- Gutiérrez, Elva I., Leal-Garza, Carlos H.

    Published 2002
    “…According to ADA criteria and European criteria all the patients were out of goodmetabolic control. These points towards the HbA1c and FBG confirm the doubts about theusefulness of FBG values as a tool for assessing metabolic control. …”
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    Article
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    Emociones percibidas por los clientes en los encuentros de los servicios para garantizar la lealtad en una relación a largo plazo: Revisión teórica preliminar (Emotions perceived... by Garza, Israel

    Published 2016
    “…It is at this point where research has emphasis. Resumen: La lealtad sigue siendo uno de los principales temas y preocupaciones para los investigadores y practicantes. …”
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    Síndrome de Burnout en instructores de inglés en escuelas primarias públicas. by Nava Gutiérrez, Juan Diego

    Published 2016
    “…In order to collect data, it was considered to use the Burnout Questionnaire for Teachers Revised, with 66 items in 5 points Likert scale, to measure emotional exhaustion, depersonalization and lack of personal accomplishment, with a total α = 0.92 in the original study. …”
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  16. 56

    Síndrome de Burnout en instructores de inglés en escuelas primarias públicas. by Nava Gutiérrez, Juan Diego

    Published 2016
    “…In order to collect data, it was considered to use the Burnout Questionnaire for Teachers Revised, with 66 items in 5 points Likert scale, to measure emotional exhaustion, depersonalization and lack of personal accomplishment, with a total α = 0.92 in the original study. …”
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    Tesis
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    FRECUENCIA DE FACTORES DE RIESGO CARDIOVASCULAR EN PERSONAL BECARIO DEL HOSPITAL GENERAL ESP. “PILAR SÁNCHEZ VILLAVICENCIO” HUAJUAPAN DE LEÓN, OAXACA. by García Sierra, Lucía, Castro Juárez Carlos, Jonnathan, Siliceo Murrieta, José Isaías

    Published 2016
    “…The biochemical variables were: blood glucose, total TG and TG, Behavioral variables: tobacco consumption, alcohol consumption and physical activity, blood samples were taken in the clinical laboratory of the hospital, the cut-off points stipulated by NOM- 015-SSA2-2010 and NOM-037-SSA2-2012. …”
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