Now showing items 1-20 of 399

    • 1020 steel coated with Ti/TiN by Cathodic Arc and Ion Implantation 

      Bermeo, F.; Quintana, Juan Pablo; Kleiman, Ariel; Sequeda, Federico O.; Márquez, Adrianna Beatriz (Institute of Physics Publishing, 2017-03-08)
      TiN coatings have been widely studied in order to improve mechanical properties of steels. In this work, thin Ti/TiN films were prepared by plasma based immersion ion implantation and deposition (PBII&D) with a cathodic ...
    • 1D lanthanide coordination polymers based on lanthanides and 4′-hydroxi-4-biphenylcarboxylic acid: Synthesis, structures and luminescence properties 

      D'vries Arturo, Richard Fernando; Gomez, German E.; Mondragon, Lina Paola; Onna, Diego; Barja, Beatriz C.; Soler-Illia, Galo J.A.A.; Ellena, Javier (Academic Press Inc., 2019-03-29)
      Synopsis: A family of coordination polymers with formula [Ln(4-OHBBA) 3 (H 2 O) 2 ] with a new 3D supramolecular network topology was obtained. Luminescence properties were studied. Resume: A new family of 1D coordination ...
    • A conceptual model for decentralized municipal wastewater management 

      Bernal Suárez, Diana Paola (IWA Publishing, 2018-03-01)
      This paper proposes a conceptual model for selecting the centralization level for wastewater management in urban areas, which is associated with main sewage collectors and wastewater treatment facilities. The model is ...
    • A facile synthesis of stable β-amino-N-/O-hemiacetals through a catalyst-free three-component Mannich-type reaction 

      Abonia, Rodrigo; Castillo, Juan C.; Garay, Alexander; Insuasty, Braulio; Quiroga, Jairo; Nogueras, Manuel; Cobo, Justo; D'vries Arturo, Richard Fernando (Elsevier Ltd, 2017-03-02)
      A practical, straightforward and one-step procedure for the synthesis of novel and stable b-amino-N-/Ohemiacetals (i.e. c-aminoalcohols) is provided. The title compounds were obtained in good to excellent yields through ...
    • A low-cost, free-software platform with hard real-time performance for control engineering education 

      González Vargas, Andrés M.; Serna Ramirez, Juan M.; Fory Aguirre, Carlos; Ojeda Misses, Alejandro; Cardona Ordoñez, John M.; Tombé Andrade, Jimmy; Soria López, Alberto (John Wiley and Sons Inc., 2018-11-04)
      In this paper, we present a novel portable servomechanism control platform for educational purposes. The platform main features are: low cost, reliable and robust hardware, high‐speed USB interface, free open source software ...
    • A mathematical model for the optimal scheduling of smart home electrical loads 

      Moya Chavez, Francisco David; Da Silva, Luiz C. P.; Lopez A., Juan C. (World Scientific and Engineering Academy and Society, 2018-01-01)
      This study develops a mathematical model for the optimal scheduling of controllable electrical loads in a smart home - MCELS. The goal of the MCELS is to minimize the total cost of the energy consumed by the smart house ...
    • A new algorithm for detecting and correcting bad pixels in infrared images 

      Restrepo Girón, Andrés David; Loaiza Correa, Humberto (Ingenieria e Investigacion, 2010-07-22)
      An image processing algorithm detects and replaces abnormal pixels individually, highlighting them amongst their neighbours in a sequence of thermal images without affecting overall texture, like classical filtering does. ...
    • A note on the use of dolphins as bait in the artisanal fisheries off Bahía Solano, Chocó, Colombia 

      Avila, Isabel C.; García, Carolina; Bastidas, Juan Carlos (Journal of Cetacean Research and Management, 2008)
      We evaluated dolphin hunting for bait in Bahía Solano, Chocó, Colombia, from July 2005 to April 2006. We interviewed 122 fishermen (18.2% of the registered fishermen in the zone) and obtained data from landings at a fishing ...
    • A novel and low-complexity peak detection algorithm for heart rate estimation from low-amplitude photoplethysmographic (PPG) signals 

      Argüello Prada, Erick Javier; Serna Maldonado, Rafael Daniel (Taylor and Francis Ltd, 2019-03)
      Low-amplitude PPG signals are more affected by noise contamination and other undesirable effects because the signal strength is comparable to noise power. Although several authors claim that decreases in the amplitude of ...
    • A search engine optimization recommender system 

      Hoyos, Christian D.; Duque, Juan C.; Barco, Andres F.; Vareilles, Elise (CEUR-WS, 2019-09-19)
      Search Engine Optimization reefers to the process of improving the position of a given website in a web search engine results. This is typically done by adding a set of parameters and metadata to the hypertext files of the ...
    • A SSVEP-BCI setup based on Depth-of-Field 

      Cotrina, Anibal; Botti Benevides, Alessandro; Castillo Garcia, Javier; Botti Benevides, Alessander; Rojas Vigo, David; Ferreira, Andre; Bastos Filho, Teodiano Freire (Institute of Electrical and Electronics Engineers Inc., 2017-02-23)
      In optical systems, the range of distance near the point of focus where objects are perceived sharply is referred as depth-of-field; objects outside this region are defocused and blurred. Furthermore, ophthalmology studies ...
    • Acoustic characteristics of vot in plosive consonants produced by parkinson’s patients 

      Argüello Vélez, Patricia; Arias Vergara, Tomás; González Rátiva, Marí­a Claudia; Orozco Arroyave, Juan Rafael; Nöth, Elmar; Schuster, Maria Elke (Springer Science and Business Media Deutschland GmbH, 2020-09-01)
      Voice Onset Time (VOT) has been used as an acoustic measure for a better understanding of the impact of different motor speech disorders in speech production. The purpose of our paper is to present a methodology for the ...
    • Acquisition Protocol and Comparison of Myoelectric Signals of the Muscles Innervated by the Ulnar, Radial and Medial Nerves for a Hand Orthoses 

      Bermeo Varón, Leonardo A.; Villarejo Mayor, John J.; Arcos, Edgar F.; Quiguanás López, Diana Maritza; Bravo, Andrea A.; Perez Plaza, Vanessa (Springer, 2020-03-03)
      This paper proposes a protocol for obtaining surface myoelectric signals in muscles of the upper limb for characterization of hand movement patterns. To characterize the movement patterns, the magnitude of the signal from ...
    • Acute and subacute toxicity of Salvia scutellarioides in mice and rats 

      Ramírez, Jorge H.; Palacios, Mauricio; Tamayo, Oscar; Jaramillo, Roberto; Gutiérrez, Oscar (Journal of Ethnopharmacology, 2007-01-19)
      The acute and subacute toxicity of the aqueous extract of Salvia scutellarioides (Lamiaceae) was studied in mice and rats. In the acute toxicity test, oral administration of 2 g/kg of Salvia scutellarioides produced neither ...
    • Acute coronary syndromes: Epidemiology and diagnosis 

      Cassiani Miranda, Carlos Arturo; Cabrera G, Armando (Salud Uninorte, 2009)
      Acute coronary syndromes are a major public health problem. Acute coronary syndrome (ACS) includes acute myocardial infarction (AMI), with or without ST elevation and unstable angina. The annual incidence of AMI is 565,000 ...
    • Adherence to the strategy of the gold minute in the partners room of an institution level II of Cali (Colombia), year 2017: Cross sectional study 

      Moreno Reyes, Sandra Patricia; Calvo Bolaños, Paola Andrea; Cruz Mosquera, Freiser Eceomo; Cubides Munévar, Ángela Mayerly; Estupiñán Pérez, Víctor Hugo (Federacion Colombiana de Asociaciones de Obstetricia y Ginecologia (FECOLSOG), 2019-08-28)
      Objetivo: determinar la adherencia global y por componentes a la estrategia minuto de oro en médicos que atienden recién nacidos en una entidad de mediano nivel de complejidad. ...
    • Aerobic exercise in patients with heart failure with and without ventricular dysfunction in a cardiac rehabilitation programme 

      Ávila-Valencia, Juan Carlos; Hurtado-Gutiérrez, Hugo; Benavides Córdoba, Vicente; Betancourt-Peña, J. (Elsevier B.V., 2019-03-27)
      Objective: To establish the effects of aerobic exercise on the physical capacity and some physiological variables in patients with heart failure with ventricular dysfunction and those with heart failure and conserved ...
    • Agotamiento profesional en personal de enfermería y factores de riesgo psicosocial 

      Méndez Beltrán, Jenny; Botero Carvajal, Alejandro (Sociedad Venezolana de Farmacologia y de Farmacologia Clinica y Terapeutica, 2019-12-01)
      Introducción: La salud de los profesionales de salud mejora la atención de los usuarios mientras que el desgaste laboral disminuye la calidad de la atención. El objetivo es describir los factores asociados al agotamiento ...
    • AKT-like as part of the cell survival signaling pathways of Trypanosoma cruzi and Trypanosoma brucei 

      Díez Mejía, Andrés Felipe; Varela Miranda, Rubén Eduardo; Pulido Muñoz, Sergio Andrés; Echeverry Gaitán, María Clara; Marín Villa, Marcel (Universidad de Antioquia, 2019-07-15)
      Las quinasas han sido descritas como las proteínas encargadas de la emisión y transducción de señales en la célula, generando respuestas que van desde la regulación de la homeostasis celular, hasta el control de la respuesta ...
    • The Akt-like kinase of Leishmania panamensis: As a new molecular target for drug discovery 

      Tirado-Duarte, Didier; Marín-Villa, Marcel; Ochoa, Rodrigo; Blandón-Fuentes, Gustavo; Soares, Maurílio José; Robledo, Sara María; Varela-M, R. E. (Elsevier B.V., 2018-01-01)
      The Akt-like kinase of Leishmania spp. is a cytoplasmic orthologous protein of the serine/threonine kinase B-PKB/human-Akt group, which is involved in the cellular survival of these parasites. By the application of a ...