PRODUCCIÓN EDITORIAL: Envíos recientes
Mostrando ítems 101-120 de 1470
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Proposal of a Linear Differential Equation of First Order that Shapes A Mixture Problem: Mobilization Difficulty among Representation Records and Natural and Algebraic Language
Although the notion of differential equation is present in fields such as mathematics and engineering , understanding by students and some teachers has been limited due to the algebraic approach that has focused teaching ... -
Centrales fotovoltaicas: contexto colombiano frente a latinoamérica continental de habla hispana
Este artículo propone un análisis del sector fotovoltaico de cada uno de los países de habla hispana de América continental, haciendo un fragmento en regiones; Centro América y Sur América respectivamente. El crecimiento ... -
Industrial Maintenance Engineering and Knowledge Management. Improvement in Business Efficiency
This article demonstrates the strategic level involving managementof knowledge in industrial maintenance engineering for businesseswith physical assets. The peculiarities that occur normally in this type ofbasic activity ... -
Physicochemical Characterization of the mo/cuins2/zn(o,oh)s/zno System by Using Photoelectron Spectroscopy XPS and AES
Volume and surface spectroscopy techniques are reliable analytical methods to characterize thin films of different materials. This paper presents results related to the composition of the absorbing film (CuInS2) and the ... -
Design of Tools that Promote Math Learning by Using Mathematica 10
This article presents the development and progress of the project “Design and Implementation of Virtual and Dynamic Objects when Learning Math”. This project is part of a series of programs that search for enhancing of ... -
Fabricación de películas delgadas de TiO2 utilizando el método Doctor Blade y Spin Coating
Los recubrimientos de TiO2 son uno de los materiales más investigados a nivel mundial debido a sus diversas aplicaciones. En este trabajo se fabricaron y caracterizaron películas de TiO2 utilizando el método de Doctor Blade ... -
Metabolitos aislados de raputia heptaphylla y esenbeckia alata (rutaceae) y síntesis de precursores de análogos de alcaloides quinolínicos
Abstract. Previous studies on the Esenbeckia alata and Raputia heptaphylla,both species belonging to the Rutaceae family, have shownimportant results with respect to their chemistry. These species havesecondary metabolites ... -
Productivity Behavior in a Cluster of Plastic Companies Established in Bogotá D.C. and Dedicated to the Manufacture of Containers, Packing, and Packaging from 2003 to 2009
This article indicates the productivity status in the plastic cluster sector in the city of Bogotá, under the terms set by the production function of Cobb-Douglas in order to establish the related points between a specific ... -
Study on the Maintenance Costs of Military Helicopters by Using ABC Costing
According to information provided by the Colombian Air Force and to investigations on helicopter maintenance, it is possible to highlight control and activity classification mechanisms. This is developed when incorporating ... -
Evaluating the Change of Carbon Dioxide Concentration in a Gas Stream by Using Chlorella Vulgaris
Chlorella vulgaris is 38% efficient in removing the carbon dioxide that is present in a gas stream. This study was based on experiments carried out with species of microalgae native from Colombia to be used in industrial ... -
Modeling of the Stump/Socket Junction Mechanical Behavior in Lower-Limb Amputees
It was possible to determine the behavior of the stump/socket junction in a transtibial amputation by using the finite element method. The area of interest includes the skin, the socket, and the bone as elements in contact. ... -
Simultaneous determination of Cu, Zn and Sn by using anodic stripping voltammetry film electrode Bismuth
It was shown the possibility to determine simultaneously the concentration of Zn and Cu in aqueous solution by Anodic Stripping Voltammetry Square Wave (SWASV) by in situ formation of a bismuth film electrode (BiFE) on a ... -
XPS study for CZTS thin films growth by PVD co-evaporation method
This study shows the preparation of different Cu2ZnSnS4 thin films, following the co-evaporation route of metals (Cu, Sn and Zn Zn) in sulfur atmosphere, in three steps sulfide formation. The best results were acquired by ... -
Chemical Characterization of the Essential Oil and Preliminary Identification of Secondary Metabolites in Leaves Belonging to the Raputia Heptaphylla (Rutaceae) Species
In order to determine the chemical composition of the essential oil of leaves belonging to the R. heptaphylla species (Rutaceae family) and to search for the preliminary presence of some secondary metabolites existing in ... -
Design of a Bench-Scale Airlift Photobioreactor
En este trabajo se evaluó un Fotobiorreactor tipo Airlift (FBR) a escala banco para el cultivo y generación de biomasa microalgal. El proceso de evaluación se desarrolló en diferentes etapas desde el análisis de variables ... -
Particle size distribution of iron tetracarboxifenilporfirina (III) adsorbed on silicon dioxide by dynamic light scattering
Particle size distribution is a critical property for characterizing particles in suspension systems. Porphyrins are sensitizers essential for different photo-chemical applications, however these compounds form aggregates ... -
Degree of Compliance and Knowledge of the Resolution 371, 2009 Regarding the Handling of Expired Medications in the City of Bogotá
This paper aimed to establish –through direct observation, surveys (to consumers, distributors, and producers of medications) and data analysis– the compliance and knowledge percentage of the Resolution 371 of 2009, through ... -
Nondimensionalization of a differential equation in a practical engineering problem
This work shows an application of Buckingham Pi theorem to obtain dimensionless parameters from a differential equation used to model an elastic damper system attached to the bumper of a car. Although the original problem ... -
The effects of temperature on the structure and morphology of (Ti,Al)N coatings
(Ti,Al)N films were grown on a susbtrate of stainless steel by means PAPVD by controlled pulsed cathodic arc technique usinga target of TiAl (50/50 % atomic) in an Ar + N atmosphere. The coatings were deposited at different ... -
Sobre las reacciones de eliminación de compuestos contaminantes de aguas por fotocatálisis con TiO2/UV: caso azul de metileno
Dada la gran importancia que la fotocatálisis heterogénea y los procesos avanzados de oxidación actualmente tienen alrededor del mundo entero en cuanto a la descontaminación de aguas se refiere, es necesario entender los ...
