Now showing items 1-20 of 1328

    • Food emulsion type oil in water prepared with high-protein from shrimp (Penaeus vannamei) heads flour – SHF 

      Cano, Yuli; García-Zapateiro, Luis A; Zárate, Yeneima
      The use of flour from shrimp (Penaeus vannamei) heads with a high content of protein (SHF) to stabilize food emulsions type oil in water (o/w) is an alternative to take advantage of the by-products of the shrimp industry. ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Permeation properties of Concrete Added with a Petrochemical Industry Waste 

      Torres-Agredo, Janneth; Torres-Castellanos, Nancy; Mejía-de-Gutiérrez, Ruby
      The aim of this study is to evaluate the permeation properties of concrete added with a residue of a petrochemical industry located in Colombia, called catalytic cracking catalyst residue (FCC). Concrete samples with 10, ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Towards the internet of agents: an analysis of the internet of things from the intelligence and autonomy perspective 

      Pico Valencia, Pablo Antonio; Holgado-Terriza, Juan A.; Herrera-Sánchez, Deiver; Sampietro, José Luis
      Recently, the scientific community has demonstrated a special interest in the process related to the integration of the agent-oriented technology with Internet of Things (IoT) platforms. Then, it arises a novel approach ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Detection and location of surfaces in a 3D environment through a single transducer and ultrasonic spherical caps 

      Moreno-Ortiz, Fabio Tomás; Castillo-Castañeda, Eduardo; Hernández-Zavala, Antonio
      In this paper, an ultrasonic arc map method for flat mapping is extended to three-dimensional space replacing the circumference arcs by spherical caps. An enclosed environment is scanned by employing a single ultrasonic ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • A continuous time model for a short-term multiproduct batch process scheduling 

      Díaz Ramírez, Jenny; Huertas, Jose Ignacio
      In the chemical industry, it is common to find production systems characterized by having a single stage or a previously identified bottleneck stage, with multiple non-identical parallel stations and with setup costs that ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Laboratory determination of hydraulic anisotropy of dense graded asphalt concrete 

      Gaxiola-Hernández, Alberto
      Dense graded asphalt concrete is widely used in roads as support structure for vehicle loads. However, it is also used for hydraulic purposes in canal linings as well as faces and cores of dams. In the design stage of these ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Validation of honey-bee smelling profile by using a commercial electronic nose 

      Correa, Ana R.; Cuenca, Martha M.; Zuluaga, Carlos M.; Scampicchio, Matteo M.; Quicazán, Marta C.
      Honey is a natural sweetener and its quality labels are associated to its botanical or geographical origin, which is being established by palynological and sensorial analysis. The use of fast and non-invasive techniques ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Size optimization of shoulder filleted shafts with relief grooves for improving their fatigue life 

      González-Mendoza, Juan Manuel; Alcántara-Montes, Samuel; Silva-Lomelí, José De Jesús; De la Cruz-Alejo, Carlos; Ocampo-Ramírez, Arturo
      Although in scientific literature there are studies regarding the inclusion of relief grooves in order to diminish the amount of stress concentration in stepped shafts, the incorporation of optimization algorithms capable ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Simulation of unsteady blood flow dynamics in the thoracic aorta 

      Laín, Santiago; Caballero, Andres D.
      In this work, blood flow dynamics was analyzed in a realistic thoracic aorta (TA) model under unsteady-state conditions via velocity contours, secondary flow, pressure and wall shear stress (WSS) distributions. Our results ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Evaluation of the methodologies used to generate random pavement profiles based on the power spectral density: An approach based on the International Roughness Index 

      Goenaga, Boris Jesús; Fuentes Pumarejo, Luis Guillermo; Mora Lerma, Otto Andrés
      The pavement roughness is the main variable that produces the vertical excitation in vehicles. Pavement profiles are the main determinant of (i) discomfort perception on users and (ii) dynamic loads generated at the ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Growth and Production of rice (Oryza Sativa l.) under different fertilization plans with Silicon 

      Alvarez Herrera, Javier Giovanni; Pinzón Gómez, Linda Paola; Vélez, Javier Enrique
      The application of fertilizers to rice crops constitutes a large percentage of productions costs, which in recent years have increased; therefore, it is necessary to implement alternatives that optimize the application and ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Growth model of the pineapple guava fruit as a function of thermal time and altitude 

      Parra-Coronado, Alfonso; Fischer, G.; Camacho-Tamayo, J. H.
      The growth of the pineapple guava fruit is primarily stimulated by temperature but is also influenced by other climactic factors, such as altitude. The goal of this study was to develop a growth model for the pineapple ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Innovative approach for achieving of sustainable urban water supply system by using of solar photovoltaic energy 

      Margeta, Jure; Đurin, Bojan
      Paper describes and analyses new and innovative concept for possible integration of solar photovoltaic (PV) energy in urban water supply system (UWSS). Proposed system consists of PV generator and invertor, pump station ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Mechanical characterization of porous asphalt mixes modified with fatty acid amides -FAA- 

      Senior Arrieta, Vanessa; Córdoba Maquilon, Jorge Eliecer
      Porous asphalt mixes (PAM), form a special road surface for asphalt pavement structures, have a special particle size distribution that lets infiltrate to the runoff storm water through of it because of its voids content ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Refined cassava flour in bread making: a review 

      Aristizabal Galvis, Johanna Alejandra; García Agredo, José Alberto; Ospina Patiño, Bernardo
      Different studies have developed a variety of breads using cassava flour, with similar characteristics to wheat flour breads. The use of cassava flour in bread making is a convenient alternative for promoting the use of a ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Hydrodeoxygenation of furfuryl alcohol over Cu/MgAl and Cu/ZnAl catalysts derived from hydrotalcite-like precursors 

      Pino, Natalia Andrea; Hincapie, Gina Marcela; López, Diana Patricia
      The aqueous phase hydrodeoxygenation (HDO) of furfuryl alcohol over Cu/MgAl and Cu/ZnAl catalysts with different Mg/Al and Zn/Al molar ratios, were investigated. Mg-Al and Zn-Al mixed oxides derived from hydrotalcites ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Development of system for automatic measurement of transient photocurrent and thermally stimulated current 

      Ramirez Botero, Asdrubal Antonio; Gordillo, Gerardo
      This paper presents details of the design and implementation of a system for measuring of thermally stimulated current (TSC) and transient photocurrent (Iph), developed using the Virtual Instrumentation concept. For that ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Development of a system dynamics model based on Six Sigma methodology 

      Cardiel Ortega, José Jovani; Baeza Serrato, Roberto; Lizárraga Morales, Rocío Alfonsina
      A dynamic model to analyze the complexity associated with the manufacturing systems and to improve the performance of the process through the Six Sigma philosophy is proposed. The research focuses on the implementation of ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • A new monitoring and characterization system of partial discharges based on the analysis of the spectral power 

      Ardila Rey, Jorge Alfredo; Albarracín Sánchez, Ricardo; Robles, Guillermo
      Partial Discharges (PD) are one of the possible causes for unexpected faults in power systems equipment, so that its measure is an essential tool for high-voltage electrical equipment maintenance. In order to characterize ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación. 
    • Comparison of maintenance scheme effects on power transformer reliability performance 

      Duran Tovar, Ivan Camilo; Rosero Zuñiga, Laura Sofia; Pavas Martínez, Andrés; Duarte Velasco, Oscar Germán
      Power transformer failures have a significant impact on electrical systems reliability, as they compromise the electricity delivery. Failures impact the operational cost of electric utilities as they endanger the accomplishment ...
      Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación.