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Mostrando ítems 1061-1080 de 1392
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Power quality detection and classification using wavelet and support vector machine
(Cartagena de Indias, 2019-09-24)This work presents the identification and classification of various disturbances that affect the quality of energy, seen as the quality of the voltage wave (harmonics, sag, swell and flicker). For this, the wavelet transform ... -
Prediction of motorcyclist traffic crashes in Cartagena (Colombia): development of a safety performance function
(Cartagena de Indias, 2021-04-05)Motorcyclists account for more than 380 000 deaths annually worldwide from road tra c accidents. Motorcyclists are the most vulnerable road users worldwide to road safety (28% of global fatalities), together with cyclists ... -
Prediction of particle level behavior in atmospheric air based on laws of physics of motion and geographic interpolation
(Cartagena de Indias, 2020)Given the global problem of high levels of pollutants in the atmosphere, it is essential to use tools to measure and determine these levels. Unfortunately, it is impossible to have devices that allow direct pollutants' ... -
Prediction of RFID performance in supply chains
(2010)This paper discusses the challenges to wide-spread radio frequency identification (RFID) adoption in supply chains using the technology s-curve and the concept of buying hierarchy. A survey on RFID uptake in New Zealand ... -
Predictive Analysis and Data Visualization Approach for Decision Processes in Marketing Strategies: A Case of Study
(Cartagena de Indias, 2020-10-08)In this paper, we perform a new strategy for recommender systems in online entertainment platforms. As a case of study, we analyzed the reading preferences based on users of Goodreads, a social network for readers, to ... -
Predictive power control for electric vehicle charging applications
(Cartagena de Indias, 2020-12-01)This paper presents a direct predictive power control (DPPC) design for vehicle charging applications. The proposed control design allows working in the Park's reference frame avoiding the usage of the phase-lock loops, ... -
Preface
(Springer Verlag, 2018) -
Preliminary Characterization of Chromium (VI) Solution Adsorption with Mytella charruana in Semi-Artificial Environments
(Springer, 2020)The bivalve specie Mytella charruana has shown great potential as a bioindicator in natural waters and a biofilter for the adsorption of metals, such as Cr(VI). This species has been found in important densities in Cartagena ... -
Preliminary machine learning model for citrus greening disease (Huanglongbing-HLB) prediction in Colombia
(Cartagena de Indias, 2020-11-09)Citrus greening disease (Huanglongbing-HLB) is considered the most destructive citrus disease worldwide. Of the three species of Candidatus liberibacter associated with HLB, two have been recently reported in Latin America. ... -
Presence of perchlorate in marine sediments from Antarctica during 2017–2020
(Cartagena de Indias, 2022-01-17)Perchlorate of natural origin is a persistent pollutant that affects thyroid function by inhibiting iodine uptake, and this pollutant is frequently detected in different ecosystems at concentrations that can harm human ... -
Presidential preferences in Colombia through Sentiment Analysis
(Cartagena de Indias, 2022)This work carries out the sentiment analysis of the social network Twitter regarding the presidential debate on May 23, where a hashtag was left open so viewers could give their points of view on these three candidates: ... -
Principales dificultades del alumnado universitario novel a la hora de elaborar un texto científico
(Cartagena de Indias, 2020-05-14)El presente trabajo de investigación-acción es un análisis mixto de corte descriptivo de los errores de micro-redacción, macro-redacción, metodológicos y de escritura en una presentación pública cometidos por 46 estudiantes ... -
Probabilistic Approach to Determine the Spatial Distribution of the Antecedent Moisture Conditions for Different Return Periods in the Atlántico Region, Colombia
(Cartagena de Indias, 2022-04-10)Previous soil moisture conditions play an important role in the design of hydraulic structures because they are directly related to the runoff threshold associated with a return period. These represent one of the main ... -
Production system in a collaborative supply chain considering deterioration
(Cartagena de Indias, 2021-06-24)This research presents a mathematical model for a collaborative planning of the supply chain involving four echelons (supplier, production plants, distribution, retails, or clients). The model seeks to maximize profit ... -
Professional Autonomy and Structural Influences: Exploring How Homicides, Perceived Insecurity, Aggressions Against Journalists, and Inequalities Affect Perceived Journalistic Autonomy in Colombia
(Cartagena de Indias, 2020)Journalistic autonomy has been studied more frequently in countries with secure democracies in terms of journalists’ perceptions of freedom and independence to work in the midst of the controls, pressures, and influences ... -
Profiling inclusive primary school teachers: With focus on transforming teacher-training processes at public educational institutions in the district of cartagena, colombia
(Cartagena de Indias, 2021-04)The main objective of this study is to profile inclusive primary school teachers at educational institutions in the District of Cartagena, Colombia. The sample consists of 91 teachers from six public primary schools. This ... -
Programmable diffractive lens for ophthalmic application
(SPIE, 2014)Pixelated liquid crystal displays have been widely used as spatial light modulators to implement programmable diffractive optical elements, particularly diffractive lenses. Many different applications of such components ... -
Programmable diffractive optical elements for extending the depth of focus in ophthalmic optics
(SPIE, 2015)The depth of focus (DOF) defines the axial range of high lateral resolution in the image space for object position. Optical devices with a traditional lens system typically have a limited DOF. However, there are applications ... -
Programmable diffractive optical elements with applicability in ophthalmic optics
(Sociedad Espanola de Optica, 2017)This paper presents results of the research related with the development of the doctoral thesis of Lenny Alexandra Romero Pérez. This work covers the design, the characterization and the analysis of several programmable ... -
Project management Tools and Techniques (T&T) usage in building sector companies in Cartagena City, T.C.D..
(Latin American and Caribbean Consortium of Engineering Institutions, 2019)This research work was based on an analysis of project management tools and techniques usage and its practical application in the construction sector. It is a fact that projects currently have a high failure rate which was ...
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.