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  1. 281

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

    Publicado 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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    Nueva gestión pública y gobernanza: desafíos en su implementación = New public management and governance: challenges in implementation por Gómez Díaz de León, Carlos

    Publicado 2013
    “…As elements of change management in the form of highlights strategic management and quality management with participatory component that characterizes the new governance model. Finally we point out some of the challenges that the model itself mean for society and civil society organizations.…”
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  9. 289

    Motivos de los estudiantes de la zona centro de México para elegir la licenciatura en nutrición por Coronel Núñez, Samuel, Pineda Sales, Isabel, Díaz García, Rafael, Reyes Méndez, Jorge Joel

    Publicado 2019
    “…The reasons were that were pointed out more frequently, both by the students who started the degree and by those who were close to concluding it were: a) Interest in working in the clinical area, b) Vocational orientation, c) Because in their family they had a problem of health related to nutrition. …”
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