Buscar
Mostrando ítems 71-80 de 990
Some experiments on the crystal growth and characterization of Fe(17)R(2) (R equals rare earth) single crystals by the Bridgman method
(Elsevier Science BvAmsterdamHolanda, 1997)
Strong dependence of superconducting transition temperature (T-c) on the rare earth ionic size in REBaSrCu3O7 (RE = Y, Dy, Nd and La) series
(World Scientific Publ Co Pte LtdSingaporeSingapura, 2000)
This issue of Earth Science Research Journal
(Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Geociencia, 2017-10-01)
We at the Earth Sciences Research Journal hope all our readers have a happy and productive 2018. Our last issue of ESRJ in 2017 presents a number of papers on different topics within the Earth Sciences. In Alvarez-Ysabel ...
Crystal Structure, Magnetic and Electrical Properties of Compounds in the RCrMnO5 Family (R = Sm, Eu, Gd, Tb, Ho and Er) Synthesized Under High Oxygen Pressure
(Wiley VCH Verlag, 2015-09-02)
RCrMnO5 (R = Sm, Eu, Gd, Tb, Ho, and Er) were synthesized at high O2 pressures and 900–950 °C. Crystal structures were refined by using powder X‐ray diffraction (PXRD) and powder neutron diffraction (PND) for Tb, Ho, and ...
Crustal thickness variations and seismicity of northwestern south america
(UNIVERSIDAD NACIONAL DE COLOMBIA, 2007)
Any uncompensated mass of the northern Andes Mountains is presumably under pressure to adjust within the Earth to its ideal state of isostatic equilibrium. Isostasy is the ideal state that anyuncompensated mass seeks to ...
Solar Power Satellite system in formation on a common geostationary orbit
(2017-10-25)
The diurnal day-night cycle severely limits the Terrestrial solar power. To overcome this limitation, a Solar Power Satellite (SPS) system, consisting of a sunlight reflector and a microwave energy generator-transmitter ...
Variable-Permeability Well-Testing Models and Pressure Response in Low-Permeability Reservoirs with non-Darcy Flow
(Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Geociencia, 2016-01-01)
This paper proposes the concept of variable-permeability effect and sets up the one-dimensional and two-dimensional non-Darcy well testing models. The finite difference algorithm is employed to solve the differential ...
Determinación de la composición óptima para la elaboración de ladrillos prensados en seco (dry-press) como alternativa al proceso de moldeo convencional (soft-mud)
(Escuela Superior Politécnica de Chimborazo, 2021-09-10)
The objective of this research was to determine the optimal composition and pressure for the production of dry-pressed bricks (Dry-Press) as an alternative to the conventional molding process (Soft-Mud). For this, first ...