Elementos: Envíos recientes
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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 ... -
Synthesis of ZnS thin films by CBD for use as buffer layer in solar cells based on Cu2SnZnS4
ZnS thin films were deposited by CBD (chemical bath deposition) method using a solution containing thiourea and zinc acetate as sources of S and Zn and ammonium citrate as complexing agent. The samples were grown on soda ... -
Redesign and optimization of a device small-scale composting to be used in urban agriculture projects
Small-scale composting on closed devices was one of the key research topics of the Bogota Botanical Garden (JBB) for the development of the Urban Agriculture Project 319 activities. Given the consolidation scenario of an ... -
Use of personalized academic text in Politécnico Grancolombiano
The assignment of personalized academic tests, aside from contributing to the eradication of fraud and plagiarism, make possible a better classroom climate. In this article we review some tools used to generate multiple ... -
Human-computer interaction on educational and artistic scenarios. Kinect as a viable proposal
The possibilities and tools offered by a computer system are becoming more advanced, thorough and comprehensive. With these advancements, the potential for interaction with modern computer systems have been expanding and ... -
Reliability engineering of Computing Systems thorugh EMSI
All systems are comprised by a series of interconnected devicesin such way that they are capable of performing particular functions. These functional blocks may be constituted by a single component or complex subsystems, ... -
Characterization of materials through SEM measures
SEM is an image generation technique widely used on materials researchdue its high-resolution capabilities and proven aptitude to unveil morphological, structural and even chemical features of a given sample.This paper ... -
Obtaining fatty acids from biomass microalgal grown under differemt lightining conditions
It is considered that microalgae fatty acids have the potential to be used as raw material for the production of biofuels such as biodiesel or food supplements. The experimental treatment consisted in the exposure of the ...
