Investigaciones: Envíos recientes
Mostrando ítems 1241-1260 de 1422
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Newman–Janis Ansatz in conformastatic spacetimes
(Springer New York LLC, 2016)The Newman–Janis Ansatz was used first to obtain the stationary Kerr metric from the static Schwarzschild metric. Many works have been devoted to investigate the physical significance of this Ansatz, but no definite answer ... -
Background intensity removal in Fourier transform profilometry: A comparative study
(OSA - The Optical Society, 2016)We study the removal of the background intensity of fringe patterns via Empirical Mode Decomposition and the Hilbert Transform. Simulation results show that the latter provides a suitable background compensation with minimal ... -
Performance analysis of a microstrip patch antenna loaded with an array of metamaterial resonators
(Institute of Electrical and Electronics Engineers Inc., 2016)An analysis of the electrical performance of a microstrip patch antenna loaded with a periodic array of metamaterial resonators is presented in this work. Hexagonal complementary split ring resonators (CSRRs) are selected ... -
In-Substrate Resonators and Bandpass Filters with Improved Insertion Loss in K-Band Utilizing Low Loss Glass Interposer Technology and Superlattice Conductors
(Institute of Electrical and Electronics Engineers Inc., 2016)In this work, we report on in-substrate passive components using a high performance glass interposer and through glass via (TGV) technology and a multi-layer superlattice conductor architecture. Minimal RF loss is achieved ... -
On the compensation of uneven illumination in retinal images for restoration by means of blind deconvolution
(Institute of Electrical and Electronics Engineers Inc., 2016)Retinal eye fundus images are used for diagnostic purposes, but despite controlled conditions in acquisition they often suffer from uneven illumination and blur. In this work, we propose the use of multi-channel blind ... -
Speckle free optical watermarking based on pseudo-random phase encoding
(Institute of Electrical and Electronics Engineers Inc., 2016)Watermarking is a process of embedding copiright information into an image to verify the ownership without any kind of corruption. In optical applications, the usage of diffusers is required to obtain a homogeneously ... -
Robust adaptive control of a planar 3RRR parallel robot for trajectory-tracking applied to crouch gait cycle in children with cerebral palsy
(Institute of Electrical and Electronics Engineers Inc., 2019)This paper presents the modelling, control and simulation of a 3RRR planar parallel robot, using a robust adaptive control strategy. The objective of this work is to achieve the control over desired trajectory-tracking of ... -
Autonomía profesional y riesgos de seguridad de los periodistas en Colombia
(Flacso Mexico, 2017)This paper analyzes the relationship between professional autonomy and security risks of journalists in Colombia. A correlational-transversal research was conducted with a sample of 751 journalists who filled out the ... -
Model of optimization of mining complex for the planning of flow of quarry production of limestone in multiple products and with elements for the analysis of the capacity
(Springer Verlag, 2017)Activities in mining complexes contain multiple decisions that affect the operations of the system for the extraction, transformation, transport and storage of various subsoil components. The purpose of this research is ... -
Reactive scheduling in collaborative supply chain: A literature review
(Revista Espacios, 2017)This paper aims to review the literature on the reprogramming of production in collaborative supply chains, through a thorough investigation and Scientometric analysis to identify the behavior of publications in recent ... -
Numerical Simulations of a Polydisperse Sedimentation Model by Using Spectral WENO Method with Adaptive Multiresolution
(World Scientific Publishing Co. Pte Ltd, 2016)In this work, we apply adaptive multiresolution (Harten's approach) characteristic-wise fifth-order Weighted Essentially Non-Oscillatory (WENO) for computing the numerical solution of a polydisperse sedimentation model, ... -
Proposal of a theoretical model of branding for the positioning of the university brand
(Revista Espacios, 2017)This article of reflection presents a vision of marketing potential and the applicability of one of its tools, called branding. In this is a historical review of branding, showing its importance through the times and how ... -
Ronda del Sinú Avenue: Spaces and meanings
(Universidad de Caldas, 2017)OBJECTIVE: To understand the meaning assigned by citizens of Montería (Colombia) to Ronda del Sinú, considered a geo-urban construction which transformed the old space of Avenida Primera, one of the most important roads ... -
Implementing a like-industrial process for control education
(Institute of Electrical and Electronics Engineers Inc., 2019)Nowadays, one of the main difficulties experienced by engineering students is the ability to assimilate theoretical concepts and apply them in practice, especially in the industrial field. Although there are different ... -
AquApp, an information system for a collaborative sensor network
(Institute of Electrical and Electronics Engineers Inc., 2016)This paper presents AquApp, an information system for a collaborative sensor network. AquApp deploys information collected from the water bodies of the city of Cartagena. The goal is to monitor the water bodies surrounding ... -
A new two-way artificial boundary condition for wave propagation
(American Institute of Aeronautics and Astronautics Inc, AIAA, 2017)We propose a new formulation of a two-way artificial boundary condition for the wave equation in mixed form. We justify appropriately the idea behind the formulation of the two-way artificial boundary condition. To exhibit ... -
Standard passivity-based control for multi-hydro-turbine governing systems with surge tank
(Elsevier Inc., 2020)This paper addresses the problem of control design for hydro-turbine governing systems with surge tanks from the perspective of standard passivity-based control. The dynamic model of a synchronous machine is considered in ... -
Design and implementation of a balanced scorecard in a colombian company
(Revista Espacios, 2017)This article presents the design and implementation of a Balanced Scorecard (BSC) in a medium-sized company in Colombia, providing synthetic indicators for objectives, perspectives and business strategies through key ... -
Application of spatio-temporal filtering for atrial activity waveforms enhancement
(Association for Computing Machinery, 2019)In this paper, we propose to apply spatio-temporal filtering to atrial activity enhancement, prior to the detection of possible atrial arrhythmias. During normal sinus rhythm, the atrial activity is well synchronized with ... -
Materials requirements planning through an application based on particle swarm optimization
(Revista Espacios, 2017)This work approaches the Material Requirements Planning (MRP) problem through a Particle Swarm Optimization (PSO) based algorithm. Results from various computer experiments are carried out considering different production ...
Universidad Tecnológica de Bolívar - 2017 Institución de Educación Superior sujeta a inspección y vigilancia por el Ministerio de Educación Nacional. Resolución No 961 del 26 de octubre de 1970 a través de la cual la Gobernación de Bolívar otorga la Personería Jurídica a la Universidad Tecnológica de Bolívar.