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  1. 81

    Estructura de edades, densidad y regeneración de Pinus hartwegii en un gradiente de elevación. by Cortés Cabrera, Héctor Enrique

    Published 2018
    “…Dichas condiciones afectan los patrones de regeneración y estos patrones a su vez afectan la composición y abundancia de los bosques, dichos cambios quedan registrados en la estructura de edades de los bosques y a través del crecimiento de anillos de los arboles adultos. …”
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    Tesis
  2. 82

    Data on the removal of metals (Cr, Cr, Cd, Cu, Ni, Zn) from aqueous solution by adsorption using magnetite particles from electrochemical synthesis by Manrique, Julio Jorge, Marriaga Cabrales, Nilson, Hernández Ramírez, Aracely, Machuca Martínez, Fiderman

    Published 2019
    “…Magnetite particles were prepared by electrolytic synthesis (average crystallite size 37.9±1.2nm, surface area ¼ 17.2 m2g1, isoelectric point ¼ 6.3, magnetic saturation ¼ 62 emu g1) and used as adsorbent of heavy metals in aqueous solutions. …”
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    Article
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    Metodologías para la Evaluación de Activos Intangibles by Palomo González, Miguel Ángel

    Published 2005
    “…Their presentation and amount in the enterprise’s balance sheet is the starting point in a management process for intangible assets which continue with the value generation and improvement in future periods. …”
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    Article
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    Intangibles en la valoración financiera de proyectos de inversión (Intangibles in the financial valuation of investment projects) by Ceballos Hornero, David, Ramírez Sarrió, Dídac

    Published 2011
    “…Financial risks (market, credit or operational) are discounted thought probability, risk premium or stress testing. This point of view is far, a priori, from a social and success perspective of the investment, because of the uncertainty only affects to data (time, money and interest rate). …”
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    Article
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    Desarrollo histórico de la educación a distancia (Historical development of distance education) by Jardines Garza, Francisco Javier

    Published 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. …”
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    Article
  12. 92

    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
  13. 93

    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. …”
    Get full text
    Tesis
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