Listar Productos de investigación por título

Mostrando ítems 345-364 de 1373

    • Counting integers representable as images of polynomials modulo n 

      Arias, Fabián; Borja, Jerson; Rubio, Luis (Cartagena de Indias, 2019)
      Given a polynomial f(x1,x2,…,xt) in t variables with integer coefficients and a positive integer n, let α(n) be the number of integers 0 ≤ a < n such that the polynomialcongruencef(x1,x2,…,xt) ≡ a(modn)issolvable. ...

    • Cov-caldas: A new COVID-19 chest X-Ray dataset from state of Caldas-Colombia 

      Alzate-Grisales, Jesús Alejandro; Mora-Rubio, Alejandro; Arteaga-Arteaga, Harold Brayan; Bravo-Ortiz, Mario Alejandro; Arias-Garzón, Daniel; López-Murillo, Luis Humberto; Mercado-Ruiz, Esteban; Villa-Pulgarin, Juan Pablo; Cardona-Morales, Oscar; Orozco-Arias, Simon; Buitrago-Carmona, Felipe; Palancares-Sosa, Maria Jose; Martínez-Rodríguez, Fernanda; Contreras-Ortiz, Sonia H.; Saborit-Torres, Jose Manuel; Montell Serrano, Joaquim Ángel; Ramirez-Sánchez, María Mónica; Sierra-Gaber, ario Alfonso; Jaramillo-Robled, Oscar; de la Iglesia-Vayá, Maria; Tabares-Soto, Reinel (Cartagena de Indias, 2022)
      The emergence of COVID-19 as a global pandemic forced researchers worldwide in various disciplines to investigate and propose efficient strategies and/or technologies to prevent COVID-19 from further spreading. One of the ...

    • COVID-19 cases correlate with greater acceptance coping in flexible cultures: A cross-cultural study in 26 countries 

      Zhou, Xiaoyu; Scott English, Alexander; Kulich, Steve J.; Zheng, Lu; Alves, Tales; Aquino, Sibele D.; Batić Očovaj, Sanja; Belen, Hacer; Biddle, Ashley; Boonroungru, Chinun; Licoa Campos, Adolfo Fabricio; Castro, Rita; Chettiar, Cicilia; Chobthamkit, Phatthanakit; Cowden, Richard G.; Dubrov, Dmitrii; Falavarjan, Mehrdad F.; Grigoryev, Dmitry; Hofhuis, Joep; Jiang, Huang; Jovanović, Veljko; Klimek-Tulwin, Monika; Kunst, Jonas R.; Lefringhausen, Katharina; Li, Xiaoyuan; Lins, Samuel; Malik, Sadia; Maricchiolo, Fridanna; Martínez-Buelvas, Laura; Nam, Benjamin H.; Navarro-Carrillo, Ginés; Pereira Neto, Jose Candido; Oliver, Eliza; Paolini, Daniele; Šakan, Dušana; Schwarzenthal, Miriam; Sun, Qian; Talhelm, Thomas; Thomson, Robert; Tipandjan, Arun; Tong, Rongtian; Torres-Marín, Jorge; Wei, Liuqing; Lan Yeung, Victoria Wai; Yuki, Masaki (Cartagena de IndiasCampus TecnológicoIngeniería Industrial, 2023-11-04)
      The current study examines whether the prevalence of COVID-19 cases and cultural flexibility correlate to one's use of acceptance coping across 26 cultures. We analyzed data from 7476 participants worldwide at the ...

    • COVID-19 Preparedness and Response by Global South and Global North Countries: A Comparative Analysis 

      Medina-Hernández, Edith-Johana; Barco-Llerena, Evelin; Villalba-Acevedo, Jorge-Luis (Cartagena de Indias, 2022)
      Comparing the countries’ level of preparedness and response to the Covid-19 pandemic involves the assessment of human development, health, connectivity and death rate indicators. In this study, information published by the ...

    • Cómo los retos profesionales y personales impactan en el desarrollo de habilidades blandas (soft skills) enfocadas hacia la innovación / 

      Dí­az Imitola, Claywi Paola; Arraut Camargo, Luis Carlos; Jiménez Suárez, Yessica Paola; Meza Gómez, Lidia Ester (2020)
      El presente artí­culo pretende analizar el impacto que tienen las habilidades blandas enfocadas a la innovación derivadas de los diferentes retos profesionales y personales qué como individuo vivimos a lo largo de nuestra ...

    • Crack Formation in Chill Block Melt Spinning Solidification Process: A Comparative Analysis Using OpenFOAM 

      Pagnola, Marcelo; Barceló, Luis Francisco; Useche Vivero, Jairo (Cartagena de Indias, 2022-01-12)
      The application of FeSiB family magnetic materials in the electrical or electronic industry has significantly increased owing to the development of amorphous and nanocrystalline metallic glasses using melt spinning and ...

    • Creating emotional proximity with the environment 

      Valencia M.C. (Taylor and Francis, 2017)

    • Creation of business profiles of exporting companies through unsupervised learning 

      de la Hoz-Dominguez, Enrique J.; Escorcia-Guzman, Adalberto; Fontalvo-Herrera, Tomás J (Cartagena de Indias, 2019)
      This research presents a method for the creation of business profiles of export companies in the city of Barranquilla - Colombia. The method is supported by the development of unsupervised data learning techniques, Principal ...

    • La cultura de innovación en el diagnostico empresarial del “Restaurante BOKERÓN” en la ciudad de Cartagena 

      Gómez García, Álvaro José; Fernández Amaya, Javier Alonso (2021)
      En el presente trabajo de grado se estudiaron las diferentes herramientas de innovación que permiten generar cultura de innovación en la organización y que a su vez ayudan a identificar falencias en los procesos y buscar ...

    • Cultura y educación para el desarrollo sostenible en la escuela oficial de Cartagena de Indias : el caso del Proyecto Ambiental Mangle en la Escuela Normal Superior / 

      Barrios Marsiglia, Karina; Espinosa Espinosa, Aarón (2020)
      El presente artí­culo analiza las relaciones que se producen entre cultura y educación para el desarrollo sostenible en el Proyecto Ambiental Mangle implementado en la Escuela Normal Superior de Cartagena de Indias. Para ...

    • Cultural damage and reparation of victims in the Colombian armed conflict. The case of the black peasant community of San Cristóbal (Montes de María – Colombia) 

      Espinosa Espinosa, Aarón; Alvis Arrieta, Jorge Luis; Ruz Rojas, Gina (Cartagena de Indias, 2021-05-16)
      The aim of this study is to identify and analyze the cultural damage caused by the armed conflict in the black peasant community of San Cristóbal, in Montes de María, one of the regions most affected by the prolonged ...

    • Cultural participation in the main Colombian cities, 2008-2015 

      Espinosa Espinosa, Aarón; Martos L.P. (Alexandru Ioan Cuza University of Iasi, 2019)
      This paper aims to explain the evolution of the cultural participation in Colombia between 2018 and 2015, and to empirically analyse the factors associated to the decision of participating in cultural activities in the ...

    • Current control mode in PV systems integrated with DC-DC converters for MPPT: An IDA-PBC approach 

      Velazquez I.O.; Perez G.R.E.; Giraldo O.D.M.; Ruiz A.G.; Norena L.F.G. (IEEE Computer Society, 2018)
      In this paper, an interconnection and damping assignment passivity-based control (IDA-PBC) theory is employed to obtain maximum power point tracking (MPPT) for a photovoltaic (PV) module. A current control mode is selected ...

    • Current PI Control for PV Systems in DC Microgrids: A PBC Design 

      Gil-González, Walter; Garces A.; Montoya O.D. (Institute of Electrical and Electronics Engineers Inc., 2019)
      This paper proposes a passive PI control for applications of photovoltaic (PV) systems integrated with boost DC-DC converters. The proposed controller guarantees asymptotically stability in closed-loop for the boost DC-DC ...

    • Cyberattacks Predictions Workflow using Machine Learning 

      Barrera Pérez, Carlos Eduardo; Serrano, Jairo E.; Martinez-Santos, Juan Carlos (Cartagena de Indias, 2021)
      This research aims to validate the effectiveness of a machine learning model composed of three classifiers: decision tree, logistic regression, and support vector machines. Through the design of a workflow, we demonstrate ...

    • Data envelopment analysis method and neural networks in the evaluation and prediction of the technical efficiency of small exporting companies 

      Fontalvo Herrera, Tomás José; De la Hoz Domínguez, Enrique José (Centro de Informacion Tecnologica, 2018)
      In this research, a method was developed to evaluate and predict the efficiency of small exporting companies taking as input or asset variables the total assets, equity, total liabilities, operating expenses, sales costs ...

    • Data-driven framework for the detection of non-technical losses in distribution grids 

      De la Hoz Domínguez, Enrique José; Rivera, A.; Botina, K.; Perdomo, G.A; Montoya, O.; Campillo Jiménez, Javier Eduardo (Cartagena de Indias, 2020-12-24)
      Non-technical losses (NTL) occurring in the electric grid, particularly at the distribution level may cause a negative impact on utilities' interest, paying consumers and states. Reducing NTL can increase revenue, profit, ...

    • Dataset for Sun dynamics from topological features 

      Tarazona Alvarado, Miguel; Sierra Porta, David (Cartagena de Indias, 2023-11-17)
      The present study presents an extensive dataset meticulously curated from solar images sourced from the Solar and Heliospheric Observatory (SOHO), encompassing a range of spectral bands. This collaborative effort spans ...

    • Dataset of academic performance evolution for engineering students 

      De la Hoz Domínguez, Enrique José (Campus TecnológicoIngeniería Industrial, 2020-04-18)
      This data article presents data on the results in national as- sessments for secondary and university education in engineering students. The data contains academic, social, economic information for 12,411 students. The ...

    • Dataset of traffic accidents in motorcyclists in Bogotá, Colombia 

      Ospina-Mateus, Holman; Berrio Garcia, Shyrle; Quintana Jiménez, Leonardo Augusto; Salas-Navarro, Katherinne (Cartagena de Indias, 2022-07-05)
      According to the World Health Organization, in 2016, Colombia obtained the tenth position worldwide, the third in the continent and the second in South America, according to the accident rate of 9.7 motorcycle fatalities ...

      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.