Universidad Tecnológica de Bolivar UTB (Colombia): últimos ingresos

Mostrando ítems 2721-2740 de 11668

    • On the use of the p-q theory for harmonic currents cancellation with shunt active filter 

      Serra F.M.; Montoya O.D.; De Angelo, Cristian Hernan; Forchetti D.G. (VSB-Technical University of Ostrava, 2019)
      Discussion and mathematical proof on necessary and sufficient conditions for the application of the p-q theory for compensating the harmonic currents consumed by non-linear load using a shunt active filter are presented. ...

    • Wirtinger's Calculus for the Load Flow in Power Distribution Grids 

      Garces A.; Gil-González, Walter; Montoya O.D. (Institute of Electrical and Electronics Engineers Inc., 2018)
      This paper shows a Wirtinger's-Calculus based loadflow methodology for power distribution grids. This approach allows to obtain an algorithm which works directly on the complex domain maintaining some useful symmetries and ...

    • Analysis and Classification of Evoked Potentials in Response to Familiar and Unfamiliar Faces 

      Sanchez-Hernandez S.A.; Contreras Ortiz, Sonia Helena (Institute of Electrical and Electronics Engineers Inc., 2018)
      Brain activity during perception and recognition of faces have been studied by researchers with the purpose to develop brain-computer interfaces and to study neurological disorders. In this paper, we analyzed evoked ...

    • An IoT Camera System for the Collection of Data Using QR Code as Object Recognition Algorithm 

      Ibanez J.F.; Serrano Castaneda J.E.; Martínez-Santos, Juan Carlos (Institute of Electrical and Electronics Engineers Inc., 2018)
      This paper proposes an Internet Of Things (IoT) implementation for recognition of objects using videos to store data about specific objects on internet. This IoT implementation is based on a recognition algorithm for objects ...

    • Small-Signal Stability in Low-Voltage DC-Grids 

      Garces A.; Herrera J.; Gil-González, Walter; Montoya O. (Institute of Electrical and Electronics Engineers Inc., 2018)
      This paper presents a general methodology for small signal stability analysis in low voltage de grids considering four type of terminals, namely: constant power, constant voltage, constant current and constant impedance. ...

    • Humor styles across 28 countries 

      Schermer J.A.; Rogoza R.; Kwiatkowska M.M.; Kowalski C.M.; Aquino S.; Ardi R.; Bolló H.; Branković M.; Chegeni R.; Crusius J.; Doroszuk M.; Enea V.; Truong T.K.H.; Iliško D.; Jukić T.; Kozarević E.; Kruger G.; Kurtić A.; Lange J.; Liik K.; Malik S.; Lins S.; Mamuti A.; Martinez-Buelvas L.; Mrkušić B.; Navarro-Carrillo G.; Oviedo-Trespalacios O.; Özsoy E.; Papazova E.; Park J.; Pylat N.; Riđić G.; Riđić O.; Skelić D.; Tan C.-S.; Torres-Marín J.; Uslu O.; Volkodav T.; Włodarczyk, Anna; Krammer G. (Springer, 2019)
      Responses to a measure of the four humor styles of affiliative, aggressive, self-enhancing, and self-defeating from the Humor Styles Questionnaire (HSQ; Martin et al. Journal of Research in Personality, 37(1), 48–75, 2003) ...

    • Yet another robot platform for teaching programming: YarpTp 

      Henríquez Núñez, Yuranis; Pedroza K.; Vega K.; Serrano J.E. (Institute of Electrical and Electronics Engineers Inc., 2018)
      This paper introduces an implementation of a robot elaborated with Raspberry Pi that accompanies the mentoring of the programming courses given at Universidad Tecnológica de Bolívar as a pedagogic element. This robotic ...

    • Technologies applied in the monitoring and control of the temperature in the Cold Chain 

      Campos Y.; Villa Ramírez, José Luis (Institute of Electrical and Electronics Engineers Inc., 2018)
      In this article, an analysis of the technologies applied for the monitoring and control of the temperature of perishable products in the cold chain is presented. Also, a general description of the stages of the process is ...

    • Implementation of an Unmanned Surface Vehicle for Environmental Monitoring Applications 

      Paez J.; Villa Ramírez, José Luis; Cabrera J.; Yime E. (Institute of Electrical and Electronics Engineers Inc., 2018)
      Environmental monitoring in inland waters is an important issue for adequate planning and management of this kind of territories. This paper shows the implementation of the concepts and strategies for a boat to follow a ...

    • Kinematic Analysis and Performance of a Planar 3RRR Parallel Robot with Kinematic Redundancy using Screw Theory 

      Rodelo M.; Villa Ramírez, José Luis; Duque Pardo, Jorge Eliécer; Yime E. (Institute of Electrical and Electronics Engineers Inc., 2018)
      In this paper, a complete kinematic analysis of a planar 3-RRR parallel robot is presented. The position through the direct and inverse kinematics, velocities, jacobians and accelerations were developed using Screw Theory. ...

    • Role of VEGF in the differential growth between the fetal and placental ends of the umbilical cord 

      Olaya-C M.; Michael F.; Fabian G.; Luis Silva J.; Bernal J.E.; Garzon A.L. (IOS Press, 2019)
      INTRODUCTION: The umbilical cord (UC) is a vital structure; its alterations affect the newborn and neurological impact can be permanent. Paradoxically, factors that determine it remain unknown. We explore the differential ...

    • Computational fluid dynamics for sub-atmospheric pressure analysis in pipe drainage 

      Besharat M.; Coronado Hernández, Óscar Enrique; Fuertes Miquel, Vicente S.; Viseu M.T.; Ramos H.M. (Taylor and Francis Ltd., 2019)
      The occurrence of sub-atmospheric pressure in the drainage of pipelines containing an air pocket has been known as a major cause of several serious problems. Accordingly, some system malfunction and pipe buckling events ...

    • An EPQ inventory model considering an imperfect production system with probabilistic demand and collaborative approach 

      Salas-Navarro K.; Acevedo Chedid, Jaime; Árquez G.M.; Florez W.F.; Ospina-Mateus H.; Sana S.S.; Cárdenas-Barrón L.E. (Emerald Group Publishing Ltd., 2019)
      Purpose: The purpose of this paper is to propose an economic production quantity (EPQ) inventory model considering imperfect items and probabilistic demand for a two-echelon supply chain. The production process is imperfect ...

    • Construct validation of the Narcissistic Admiration and Rivalry Questionnaire in Spanish-speaking countries: Assessment of the reliability, structural and external validity and cross-cultural equivalence 

      Doroszuk M.; Kwiatkowska M.M.; Torres-Marín J.; Navarro-Carrillo G.; Włodarczyk, Anna; Blasco-Belled A.; Martínez-Buelvas L.; Newton J.D.A.; Oviedo-Trespalacios O.; Rogoza R. (Wiley-Blackwell Publishing Ltd, 2019)
      A recent re-operationalisation of grandiose narcissism has resulted in the distinction of two narcissistic strategies based on the cognitive, affective-motivational and behavioural dynamics: admiration (assertive ...

    • Implementation of an E.R.P. Inventory Module in a Small Colombian Metalworking Company 

      Coronado Hernández, Jairo Rafael; Ospina-Mateus H.; Canabal-Gónzalez D.; Peña-Ballestas D.; Baron-Villamizar, Javier; Mercado-Carusso N.; Romero-Conrado A.R.; Paternina-Arboleda C.; Silva J. (Springer, 2020)
      This paper aims to analyze the effect of implementing an inventory module of ERP Openbravo for the reduction of information flow time and customer response time, in a Colombian metalworking company. The processes structure ...

    • Using Data-Mining Techniques for the Prediction of the Severity of Road Crashes in Cartagena, Colombia 

      Ospina-Mateus H.; Quintana Jiménez, Leonardo Augusto; López-Valdés F.J.; Morales-Londoño N.; Salas-Navarro K. (Springer, 2019)
      Objective: Analyze the road crashes in Cartagena (Colombia) and the factors associated with the collision and severity. The aim is to establish a set of rules for defining countermeasures to improve road safety. Methods: ...

    • Generational diversity and quality of work life: Case study in the Colombian logistic sector 

      Martínez-Buelvas L.; Jaramillo-Naranjo O.; Oviedo-Trespalacios O. (International Business Information Management Association, IBIMA, 2019)
      Drawing upon generational differences in work values and attitudes, this article examines perception of quality of work life of three generational cohorts using survey data collected from 522 employees of the logistic ...

    • Modular architecture principles–MAPs: a key factor in the development of sustainable open architecture products 

      Mesa J.A.; Esparragoza I.; Maury H. (Taylor and Francis Ltd., 2019)
      Modularity is one of the most useful tools employed in the product development process. Regarding functionality, the use of modules is common to generate flexible platforms to manufacture products and product families that ...

    • Bots and gender profiling on twitter using sociolinguistic features notebook for PAN at CLEF 2019 

      Puertas E.; Moreno-Sandoval L.G.; Plaza-Del-Arco F.M.; Alvarado‑Valencia, Jorge Andres; Pomares-Quimbaya A.; Alfonso Ureña-López L. (CEUR-WS, 2019)
      Unfortunately, in social networks, software bots or just bots are becoming more and more common because malicious people have seen their usefulness to spread false messages, spread rumors and even manipulate public opinion. ...

    • Toward an automatic 3D measurement of skin wheals from skin prick tests 

      Marrugo A.G.; Romero L.A.; Pineda J.; Vargas R.; Altamar Mercado, Hernando; Marrugo J.; Meneses J. (SPIE, 2019)
      The skin prick test (SPT) is the standard method for the diagnosis of allergies. It consists in placing an array of allergen drops on the skin of a patient, typically the volar forearm, and pricking them with a lancet to ...