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Now showing items 1-20 of 9560
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10 Gigabit Ethernet : alto desempeño para la inteconexión de redes /
(Universidad Tecnológica de Bolívar, 2004)Desde su origen, hace más de 25 años, Ethernet ha evolucionado para satisfacer el incremento de demanda de redes de conmutación de paquetes. Debido a su bajo costo de implementación, su confiabilidad y relativa simplicidad de ... -
3-webs with singularities
(Maik Nauka-Interperiodica Publishing, 2016)A 3-web with singularities is an ordered collection of three one-dimensional distributions L1, L2, L3 on a 2-dimensional manifold M. The subset Σ ⊂ M where these distributions are not pairwise transversal is called the ... -
3GPP banda ancha móvil : LTE/LTE-advanced /
(Universidad Tecnológica de Bolívar, 2012)La demanda global de servicios de datos móviles está creciendo continuamente. Casi todos los que usan un teléfono móvil o dispositivo en cualquier parte del mundo están exigiendo un acceso más rápido a más datos multimedia. ... -
A blockchain solution for operational parameters monitoring platform for DC microgrids
(Cartagena de Indias, 2020-12-01)Large penetration of renewable distributed energy resources, as well as the effective integration of storage systems and electric vehicles, are some of the required strategies to reduce the impact of the energy sector on ... -
A boundary element method formulation for modal analysis of doubly curved thick shallow shells
(Elsevier Inc., 2016)The study of vibrations of shells is an important aspect in the design of thin-walled structures. In general, analytical solutions for the natural frequencies of shells are not possible, and computational techniques are ... -
A broad diversity survey of Rhizoctonia species from the Brazilian Amazon reveals the prevalence of R. solani AG-1 IA on signal grass and the new record of AG-1 IF on cowpea and soybeans
(Cartagena de IndiasCampus Tecnológico, 2020-03-01)Leaf blight, sheath blight, and web blight are major diseases caused by Rhizoctonia species on both Fabaceae and Poaceae plant hosts in the Brazilian Amazon agroecosystem. To determine the diversity of Rhizoctonia species ... -
A case study approach to introduce circular economy in sustainable design education
(Institution of Engineering Designers, The Design Society, 2019)Finding sustainable solutions to worldwide problems has become a critical challenge for engineers. The use of natural resources and the generation of materials now degradable should be controlled when sustainable solutions ... -
A chronological literature review of electric vehicle interactions with power distribution systems
(Campus TecnológicoIngeniería Electrónica, 2020-06-11)In the last decade, the deployment of electric vehicles (EVs) has been largely promoted. This development has increased challenges in the power systems in the context of planning and operation due to the massive amount of ... -
A collaborative EPQ inventory model for a three-echelon supply chain with multiple products considering the effect of marketing effort on demand
(Cartagena de IndiasCampus Tecnológico, 2020-06-01)This paper presents an inventory model for a three-echelon supply chain with multiple products and multiple members considering the demand as an increasing function of the marketing effort. In the proposed inventory model, ... -
A Comparative Study of Signal Analysis Methods Applied in the Detection of Instantaneous Frequency
(Cartagena de IndiasCampus TecnológicoIngeniería Eléctrica, 2020-12-16)The smart grid concept is being applied more and more frequently and this is due to the need to integrate all the components that are part of power systems today, starting from generation units, storage systems, communications ... -
A Comparative Study on Power Flow Methods for Direct-Current Networks Considering Processing Time and Numerical Convergence Errors
(Cartagena de Indias, 2020-12-03)This study analyzes the numerical convergence and processing time required by several classical and new solution methods proposed in the literature to solve the power-flow problem (PF) in direct-current (DC) networks ... -
A computational model for residual life assessment of dents generated by explosive loads in pipelines
(2003)The present work develops a finite elements computational model that describes the process of dynamic deformation in pipelines under explosive loads. The mechanical response of the material is modeled by means of an ... -
A Convex OPF Approximation for DC Networks Considering Voltage-Dependent Load Models
(Cartagena de Indias, 2020-12-01)This paper addresses the problems of power flow and optimal power flow analysis considering voltage-dependent load models from the convex point of view. First, Taylor series expansion method is employed for linearizing the ... -
A convex OPF approximation for selecting the best candidate nodes for optimal location of power sources on DC resistive networks
(Elsevier B.V., 2019)This paper proposes a convex approximation approach for solving the optimal power flow (OPF) problem in direct current (DC) networks with constant power loads by using a sequential quadratic programming approach. A ... -
A density functional theory study of the reconstruction of gold (111) surfaces
(American Chemical Society, 2014)We studied (p × √3) gold (111) surface reconstructions within the DFT/PW91 approximation. Our findings clearly show that the reconstruction is energetically favorable in unreconstructed surfaces equal to or larger than the ... -
A fin de contribuir al mayor realce de las festividades
A fin de contribuir al mayor realce de las festividades del sesquicentenario de la independencia de Cartagena, el señor Paul R. Ratliff hizo entrega de la suma de {dollar} 25.000 al doctor Roberto Méndez Villarreal, alcalde ... -
A flexible and simplified calibration procedure for fringe projection profilometry
(SPIE, 2019)Fringe Projection Profilometry (FPP) is a widely used technique for optical three-dimensional (3D) shape measurement. Among the existing 3D shape measurement techniques, FPP provides a whole-field 3D reconstruction of ... -
A generalization of the Gauss–Bonnet–Hopf–Poincaré formula for sections and branched sections of bundles
(Elsevier B.V., 2017)For a two-dimensional compact oriented Riemannian manifold (M,g), and a vector field V on M, the Hopf–Poincaré theorem combined with the Gauss–Bonnet theorem gives the Gauss–Bonnet–Hopf–Poincaré (GBHP) formula: ∑z∈Z(V)indz(V)= ... -
A generalized passivity-based control approach for power compensation in distribution systems using electrical energy storage systems
(Elsevier Ltd, 2018)This paper presents a generalized interconnection and damping assignment passivity-based control (IDA-PBC) for electric energy storage systems (EESS) such as: superconducting magnetic energy storage (SMES) and supercapacitor ... -
A Generic Materials and Operations Planning Approach for Inventory Turnover Optimization in the Chemical Industry
(Cartagena de Indias, 2020-05-22)Chemical industries usually involve continuous and large-scale production processes that require demanding inventory control systems. This paper aims to show the results of the implementation of a mixed-integer programming ...
