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Mostrando documentos 21696-21715 de 69314
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Dynamic estimation of greenhouse gas emissions from bovine livestock of Valle del Cauca, Colombia
The contribution of Colombia to global emissions of greenhouse gases (GHGs) is low (0.37%); from this percentage, 38% is attributed to agriculture. There are few studies on GHGs emissions at the regional level for agriculture. ...Universidad Nacional de Colombia Revistas electrónicas UN Acta Agronómica. -
Dynamic line rating state estimation
Nowadays, the assets of power systems face economic, social, technical and environmental challenges. These challenges arise as a consequence of energy system dynamics that need to increase their reliability and safety as ...Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica Ingeniería Eléctrica. -
Dynamic model for the multiproduct inventory optimization with multivariate demand
IInventory Policies for the industry are a need to its profitability and to provide adequate service to the clients. The final stage in the internal logistic of the supply chain, the storage and the final disposal, must ...Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Ingeniería de la Organización. -
Dynamic model for the multiproduct inventory optimization with multivariate demand
Abstract: Inventory Policies for the industry are a need to its profitability and to provide adequate service to the clients. The final stage in the internal logistic of the supply chain, the storage and the final disposal, ...Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Ingeniería de la Organización. -
Dynamic model to analyze pedestrian traffic policies in bogota
Pedestrian systems are increasingly becoming important for transportation planning in cities, however, approaches are meant for microscopic analysis and representation, thus do not seem to be adequate for decision making ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Dynamic modelling of track-vehicle interaction in railway systems: effect of elastic properties of the track and substructure
In Metro de Medellín as well as in several railway systems around the world, the presence of defects has generated a high cost associated with the maintenance and replacement of track components. These problems have been ... -
Dynamic stability of slender columns with semi-rigid connections under periodic axial load: theory
The dynamic stability of an elastic prismatic slender column with semirigid connections at both ends of identical stiffness and with sidesway between the two ends totally inhibited, subject to parametric axial loads including ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Dynamic stability of slender columns with semi-rigid connections under periodic axial load: verification and examples
The dynamic stability of an elastic prismatic slender column with semirigid connections at both ends of identical stiffness and with sidesway between the two ends totally inhibited, subject to parametric axial loads including ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Dynamic wired-wireless architecture for wdm stacking access networks
This paper presents a dynamic architecture for convergent wired and wireless access networks in Time Division Multiplexing (TDM) based Passive Optical Network (PON) featuring wavelength stacking. Four wavelengths for wired ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Dynamic-Interactive Graphics for Statistics (26 Years Later)
This paper briefly reviews the history of dynamic-interactive graphics for statistics, introduces an example of such graphics, and provides a few glimpses as to the current state of things and the future trends we envision. ...Universidad Nacional de Colombia Revistas electrónicas UN Revista Colombiana de Estadística. -
Dynamical analysis of three–phase systems controlled by ZAD-FPIC Techniques
El presente trabajo se enfoca en dos aspectos fundamentales en los cuales se han realizado diferentes aportes. El primero de ellos consiste en el modelado de los motores de inducción lineal (LIM), en el cual se han incluido ...Universidad Nacional de Colombia Sede Manizales Facultad de Ingeniería y Arquitectura Departamento de Ingeniería Eléctrica, Electrónica y Computación. -
Dynamical systems approach to determine the far-from-equilibrium attractors for the Gubser flow
During the last decades it has been proven that relativistic hydrodynamics is a valuable phenomenological tool to describe high energy nuclear collisions. Recently, the research has focused on understanding the concept ...Universidad Nacional de Colombia Sede Bogotá Facultad de Ciencias Departamento de Física. -
DYNAMICS AND ENTANGLEMENT OF A QUANTUM DOT-CAVITY SYSTEM COUPLED BY A NON-LINEAR OPTICAL INTERACTION
We propose a simple theoretical model for a dissipative quantum dot-microcavity system interacting with a non-linear optical interaction. The Lindblad master equation formalism is considered to study the full dynamics for ...Universidad Nacional de Colombia Revistas electrónicas UN MOMENTO - Revista de Física. -
Dynamics of a discrete predator-prey system with nonconstant death rate
In this paper, we will consider a discrete non-autonomous predator-prey system with nonconstant death rate. We give sufficient conditions in order to get a dissipative and permanent system. By using the continuation theorem ...Universidad Nacional de Colombia Revistas electrónicas UN Boletín de Matemáticas. -
Dynamics of confined liquid crystals
Thermotropic nematic liquid crystals in contact with surfaces at the nanoscale were studied by means of beyond equilibrium thermodynamics and computational simulations. In particular, nanoparticles of different geometries ... -
Dynamics of goblet cells during infection by p. multocida and b. bronchiseptica in rabbits
Se evaluó el número y las características histoquímicas de las células caliciformes (CC) en la cavidad nasal y la nasofaringe de conejos sanos y enfermos de septicemia y rinitis inducida por P. multocida y B. bronchiseptica. ...Universidad Nacional de Colombia Revistas electrónicas UN Revista de la Facultad de Medicina Veterinaria y de Zootecnia. -
Dynamics of the cold solar chromosphere observed with ALMA
In this thesis, a dynamic study of cold regions of the solar chromosphere observed by the Atacama Large Millimeter/submillimeter Array (ALMA) in band 3 is presented. The analysis integrates data from the Solar Dynamics ... -
Dynamics of the continental slope demersal fish community in the Colombian Caribbean – Deep-sea research in the Caribbean
Abstract: Nowadays, the limited knowledge of marine biodiversity in the deep-sea faces increasing human exploration interest of this environment in the Colombian Caribbean (e.g. recent hydrocarbon exploration activities), ...Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Geociencias y Medio Ambiente. -
Dynkin Functions and Its Applications
Dynkin functions were introduced by Ringel as a tool to investigate combinatorial properties of hereditary artin algebras. According to Ringel, a Dynkin function consists of four sequences associated to An, Bn, Cn, Dn and ... -
Dysphagia lusoria and zenker`s diverticulum
Una mujer de 81 años fue remitida para evaluación de unadisfagia que padecía desde hacía cuatro años. Una endoscopiagastrointestinal reveló un divertículo de Zenker y una compresiónextrínseca del esófago. Un escaneo ...Universidad Nacional de Colombia Revistas electrónicas UN Revista de la Facultad de Medicina.
