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I+D Tecnológico
129 Publications
collected from a compatible aggregator


  • Quantum tunneling in magnetic tunneling junctions

    Cruz de Gracia, Evgeni; Strazzabosco Dorneles, Lucio; Schelp, Luiz Fernando; Ribeiro Teixiera, Sérgio; Baibich, Mario Norberto (2012)
    This paper reports on the study of ferromagnetic tunneling junctions produced by magnetron sputtering technique and deposited under oxidation conditions that lead to low potential barrier height, low asymmetrical barrier and quantum tunneling as the charge transport mechanism. The exponential growth of the effective area-resistance product with the effective barrier thickness, and the concentration of the tunnel current in small areas of the junctions, were identified by fitting room temperat...

    Building a magnetic declination maps and its anomalies for the Isthmus of Panama during 2010 to 2014

    González, Freddy; Mojica, Alexis (2017)
    This work presents an updated magnetic declination map of the Isthmus of Panama for the years 2010 to 2014 based on the IGRF-11 model from the International Association of Geomagnetism and Aeronomy. This model takes into account changes in the Earth’s magnetic field and its influence on the magnetic declination. These elements are important for determining accurate mapping which may be used to support systems of sea or air navigation. The results obtained show that the magnetic declination li...

    Control de calidad del concreto (Normas, pruebas y cartas de Control)

    Patiño, Oscar; Méndez, Roselín (2005)
    En las aplicaciones de ingeniería se utilizan herramientas y procedimientos científicos para evaluar la calidad de un producto. Como herramientas podemos señalar los equipos de producción y los instrumentos de laboratorio; como procedimientos, los planes de calidad y las normas. Un mezcla de concreto puede prepararse utilizando diversos mecanismos de mezclado, sin embargo, los requisitos de calidad pueden ser alcanzados si se cumplen rigurosamente con cada etapa del proceso, desde la selecci...

    Comparación entre Metodología Cuantitativa y Cualitativa en Medición de Cultura – Un Estudio Preliminar

    Rebolledo, Pedro (2009)
    Con fundamento en sus propias afirmaciones, ¿podrán tanto un instrumento cualitativo como uno cuantitativo, dentro de cualquier organización, aflorar con igual eficacia los verdaderos valores culturales básicos-subyacentes con independencia del marco conceptual en el que se fundamentan? A fin de avanzar parcialmente en la búsqueda, se escogió una organización sin fines de lucro (HOPO en todo el escrito), tipo religiosa, para aplicar tanto el instrumento cuantitativo “OCAI” como la cualitati...

    Characterization and Analysis of Polycyclic Aromatic Hydrocarbons in marine sediments of Manzanillo Bay and influence biodegradation processes

    Grey G., Ariel Antonio; Domínguez de Franco, Viccelda (2016)
    A study was conducted to characterize and analyze the presence of Polycyclic Aromatic Hydrocarbons (PAH) in sediments of Manzanillo Bay in order to determine their influence on the biodegradation processes. A total of five study stations were identified. The study determined the texture of the sediment, organic content, Hydrogen Potential (pH), temperature, total coliforms and E. coli to evaluate their influence on the biodegradation process of the area. All the study areas were composed of m...
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