Resultados de búsqueda - ((estas OR esta) OR (est OR (((esterasas OR prtesteaas) OR tesis) OR (testes OR testa)))) point

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    Desarrollo histórico de la educación a distancia (Historical development of distance education) por Jardines Garza, Francisco Javier

    Publicado 2009
    “…In this paper we describe the historical development in distance education from a general point of view. We resume the historical evolution of internet, and its relationship with important social issues as communication, defense, and education. …”
    Enlace del recurso
    Artículo
  10. 150

    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. …”
    Enlace del recurso
    Tesis
  11. 151

    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. …”
    Enlace del recurso
    Tesis
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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... por Garza, Israel

    Publicado 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. …”
    Enlace del recurso
    Artículo
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