Now showing items 470-489 of 962

    • Harmonic distortion evaluation generated by PWM motor drives in electrical industrial systems 

      Sousa Santos, Vladimir; Hernandez Herrera, Hernan; Quispe, Enrique Ciro; Viego, Percy Rafael; Gómez, Julio Rafael (International Journal of Electrical and Computer Engineering, 2017-12-06)
      This paper evaluates the harmonic distortion generated by PWM motor drives in an electrical industrial system of a wheat flour mill company. For this, a comparative study between two industrial circuits connected at the ...
    • Hazardous elements and amorphous nanoparticles in historical estuary coal mining area 

      Duarte Gonzalez, Ana Lucia; Da Boit Martinello, Katia; Silva Oliveira, Marcos Leandro; Calesso Teixeira, Elba; Schneider, Ismael Luis; Silva Oliveira, Luis Felipe (Geoscience Frontiers, 2019)
      In Brazil, intense coal exploitation activities have led to environmental deterioration, including soil mortification, water contamination, loss of ecosystem, and atmospheric contamination. In addition, considerable ...
    • Health care costs and resource utilization for different asthma severity stages in Colombia: a claims data analysis 

      Flórez-Tanus, Álvaro; Parra, Devian; Zakzuk, Josefina; Caraballo, Luis; Alvis-Guzmán, Nelson (World Allergy Organization Journal, 2018)
      Background: Asthma is one of the most common chronic respiratory conditions worldwide. Asthma-related economic burden has been reported in Latin America, but knowledge about its economic impact to the Colombian health ...
    • Health Risks Associated with Heavy Metals in Imported Fish in a Coastal City in Colombia 

      Herrera-Herrera, Claudia; Fuentes Gandara, Fabio Armando; Zambrano-Arévalo, Alejandra; Bernal Higuita, Faisal; Pinedo Hernández, José; Marrugo-Negrete, José (Universidad de la Costa, 2018-11-17)
      Colombia is a fish exporter and consumer country because of its geographical location. Since 2012, imported fish have become a more economical option than domestic species due to free trade agreements. Concentrations of ...
    • Hepatitis B infection control in Colombian amazon 

      Garcia, Diego; Porras, Alexandra; Rico Mendoza, Alejadro; Alvis, Nelson; Cristina Navas, Maria; De La Hoz, Fernando; De Neira, Marlen; Osorio, Elkin; Fernando Valderrama, José (Universidad de la Costa, 2017-11-05)
      Background: Hepatitis B virus (HBV) infection is highly endemic in the Colombian Amazon basin. In Colombia, the universal hepatitis B vaccination in that area has been active since 1993. The program targets children aged ...
    • Heuristic for material and operations planning in supply chains with alternative product structure 

      Coronado Hernández, Jairo Rafael; Simancas Mateus, Daniela; Avila Martinez, Karolina; Garcia Sabater, Jose Pedro (Journal of Engineering and Applied Sciences, 2017)
      This research presents a heuristic system to solve the problem of materials and operations planning in supply chains with alternative product structures. The objective is minimizing the costs associated to stock levels, ...
    • Hierarchical ascending classification: An application to contraband apprehensions in Colombia (2015–2016) 

      Lis Gutierrez, Jenny Paola; Reyna Niño, Harry Ernesto; Gaitan, Mercedes; Viloria Silva, Amelec Jesus; Santander Abril, Jairo Enrique (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 2018)
      An empirical study of ex post facto type was carried out using, as a primary source, the database of the Direction of Management of Control of the Subdirector of Management of Customs Control in the Dirección de Impuestos ...
    • Higher use of techniques studied and performance in melee combat produce a higher psychophysiological stress response 

      Diaz Manzano, Montaña; Fuentes, Juan Pedro; Aznar Lain, Susana; Clemente Suárez, Vicente Javier (Stress and Health, 2018)
      We aimed to analyse the effectiveness of an operative training in soldiers' psychophysiological and melee combat performance. Nineteen soldiers performed a 50-hr training for 10 weeks. After training, they were divided ...
    • Highly Efficient Catalysis of Retro-Claisen Reactions: From a Quinone Derivative to Functionalized Imidazolium Salts 

      Visbal Acevedo, Renso Raul; Laguna, Antonio; Gimeno, María Concepción (Chemistry - A European Journal, 2016)
      A new and efficient method for the preparation of several imidazolium salts containing an ester group in the C4 position of the aromatic ring through a retro-Claisen reaction pathway between a quinone derivative and several ...
    • Historia de la cátedra de neurología de la Universidad de Buenos Aires (1887-2007) 

      Allegri, Ricardo Francisco; Bartoloni, Leonardo C.; Sica, Roberto Eduardo Pedro (Vertex (Buenos Aires, Argentina), 2016)
      En 1887, sólo cinco años después de que Jean-Martin Charcot fuera designado profesor de Neurología en París, José María Ramos Mejía devino el primer profesor de la especialidad de la Facultad de Medicina de la Universidad ...
    • Historic building materials from Alhambra: Nanoparticles and global climate change effects 

      L.S. Oliveira, Marcos; Dario, Carolina; F. Tutikian, Bernardo; Ehrenbring, Hinoel Zamis; C.O. Almeida, Caliane; F.O. Silva, Luis (Universidad de la Costa, 2019-09-20)
      Advanced microscopy analyses are capable of revealing particles that are existent in the Alhambra, Spain, a UNESCO World Heritage Site, at minimal levels owing to the detailed directing on ultra-fine (UFPs) and nano-particles ...
    • Historical development of psychosocial risk assessment methods 

      Viloria Silva, Amelec Jesus; Bucci, Nunziatina; Luna, Marisabel (Journal Of Engineering And Applied Sciences, 2017)
      The purpose of this study is to outline the historical development of psychosocial risk assessment methods that emerged from stress research based on the person-environment program formulated by Karasek and his colleagues ...
    • Hospital admission and risk assessment associated to exposure of fungal bioaerosols at a municipal landfill using statistical models 

      Morgado Gamero, Wendy Beatriz; Agudelo Castañeda, Dayana Milena; Castillo Ramirez, Margarita; Mendoza Hernandez, Martha; Posso Mendoza, Heidy; Parody, Alexander; Viloria Silva, Amelec Jesus (2018-11-09)
      The object of this research to determine the statistical relationship and degree of association between variables: hospital admission days and diagnostic (disease) potentially associated to fungal bioaerosols ...
    • Hospitalization costs due to severe acute respiratory infection (SARI) in three Central American countries 

      Alvis-Guzmán, Nelson; Marín-Correa, Carlos; Castañeda-Orjuela, Carlos Andrés; Sánchez-Ruiz, Carolina; Carrasquilla-Sotomayor, María; Sanchez-Largaespada, Felix; Mena, Ricardo; Mejía, Homer (Infectio, 2018-01-11)
      Objective: To estimate the direct medical costs of severe acute respiratory infection (SARI) in children and adults from three Central American countries with a bottom-up costing approach. Methods: The costs of inpatients ...
    • Human capital through a prospective method: a study for latin america 

      Laverde Rojas, Heruy; Gaitan, Mercedes; Lis Gutierrez, Jenny Paola; Viloria Silva, Amelec Jesus; Vega Riano, Pilar (Journal Of Engineering And Applied Sciences, 2017)
      This paper aims to evaluate education as a component of human capital in comparison to other types of investments that relate to the formation of this stock. First, this study uses a nonparametric method, known as prospective, ...
    • Human Capital Through A Prospective Method: A Study For Latin America 

      Laverde Rojas, Heruy; Gaitan, Mercedes; Lis Gutierrez, Jenny Paola; Viloria Silva, Amelec Jesus; Vega Riano, Pilar (Journal Of Engineering And Applied Sciences, 2017)
      Ths study aims to evaluate education as a component of human capital in comparison to other types of investments that relate to the formation of this stock. First, this study uses a nonparametric method known as prospective ...
    • Human Health Impacts Of Exposure To Metals Through Extreme Consumption Of Fish From The Colombian Caribbean Sea 

      Fuentes Gandara, Fabio Armando; Pinedo Hernandez, Jose Joaquin; Marrugo Negrete, Jose Luis; Diez, Sergi (Environmental Geochemistry And Health, 2018-02)
      The health risks of metal exposure due to the high consumption of fish were assessed for a riverine population living on the Caribbean coast of Colombia. The concentrations of metals (Cd, Cr, Cu, Hg, Ni, Pb and Zn) in the ...
    • Human occupation as a complex system 

      Olarte Arias, Yury Arenis; Balaguera, M. I.; Gaitan, Mercedes; Lis Gutierrez, Jenny Paola; Viloria Silva, Amelec Jesus; Hernández Chací, Ana (Lecture Notes in Computer Science, 2018)
      The present work justifies the change in theoretical approach required to use the concepts, principles and methods of artificial intelligence and computational science in order to deal with problems centered in social ...
    • Hydraulic and environmental design of a constructed wetland as a treatment for shrimp aquaculture effluents 

      Ramírez León, Hermilo; Barrios Piña, Héctor Alfonso; Cuevas Otero, Abraham; Torres Bejarano, Franklin Manuel; Ponce Palafox, Jesús Trinidad (Communications in Computer and Information Science, 2016)
      Shrimp aquaculture has grown to the extent that pressure on natural ecosystems has greatly increased. The shrimp farms effluents usually discharge their wastes, with high nutrients load, into coastal water bodies without ...
    • Hydrodynamic modeling for the sustainable management of the guájaro hydrosystem, Colombia 

      Torres Bejarano, Franklin Manuel; Padilla Coba, Jesus; Ramírez León, Hermilo; Rodríguez Cuevas, Clemente; Cantero Rodelo, Ruben Dario (Ciencia e ingeniería ambiental (Subseries: Environmental Science), 2016)
      The Guájaro reservoir is the most important water body located at the north of Colombia. It is supplied by an artificial channel (Canal del Dique) through a two floodgates system. As a result of excess nutrients and other ...