Investigaciones: Envíos recientes

Mostrando ítems 1161-1180 de 1465

    • Children vaccination programs in latin america, 2000-2015 

      Mendoza-Mendoza A.; De La Torre K.C.; Domínguez E.H. (Editorial Ciencias Medicas, 2019)
      Introduction: Coverage of children vaccination programs is associated with the survival probability of infants and it is a measure of the performance of national immunization systems. Objective: To characterize children ...

    • Robot based on task-space dynamical model 

      Yime E.; Saltaren R.; Garcia C.; Sabater J.M. (2011)
      This study deals with the dynamic modelling and task space control of the Stewart-Gough platform. The dynamic equations were obtained using the virtual work approach, and include all the 13 presented in the platform, that ...

    • Viable business models for M-commerce: The key components 

      Gan J.; Gutiérrez J.A. (IGI Global, 2011)
      As mobile applications increase in popularity, the issue of how to build viable business models for the m-commerce industry is becoming a clear priority for both organizations and researchers. In order to address this ...

    • Electrically tunable evanescent mode half-mode substrate-integrated- waveguide resonators 

      Senior D.E.; Cheng X.; Yoon, Y.K. (2012)
      Electrically tunable evanescent mode half mode substrate integrated waveguide (HMSIW) resonators are implemented for S band applications. An HMSIW loaded with a complementary split ring resonator (CSRR) achieves forward ...

    • Differential diagnosis of hemorrhagic fevers using ARTMAP 

      Caicedo W.; Quintana Álvarez, Moisés Ramón; Pinzón H. (Springer Verlag, 2012)
      The differential diagnosis of endemic hemorrhagic fevers in tropical countries is by no means an easy task for medical practitioners. Several diseases often overlap with others in terms of signs and symptoms, thus making ...

    • Economic lot scheduling with deliberated and controlled coproduction 

      Vidal-Carreras P.I.; Garcia-Sabater J.P.; Coronado Hernández, Jairo Rafael (2012)
      This paper presents an algorithm to define the optimal parameters for deliberated and controlled coproduction in an economic lot scheduling problem setting (DCCELSP). Coproduction is said to be deliberated and controlled ...

    • Corporation income taxes and the cost of capital: A revision 

      Kolari J.W.; Vélez-Pareja I. (2012)
      The value of debt tax shields in foundational corporate valuation models by Nobel Laureates Modigliani and Miller (MM) continues to be a controversial issue that is central to our understanding of corporate finance. Rather ...

    • Stationary axially symmetric relativistic thin discs with nonzero radial pressure 

      González G.A.; Gutiérrez-Piñeres A.C. (2012)
      A detailed analysis of the surface energymomentum (SEMT) tensor of stationary axially symmetric relativistic thin discs with nonzero radial pressure is presented. The physical content of the SEMT is analysed and expressions ...

    • An Infinite Family of Magnetized Morgan-Morgan Relativistic Thin Disks 

      Gutiérrez-Piñeres A.C.; González G.A. (2012)
      Applying the Horský-Mitskievitch conjecture to the empty space solutions of Morgan and Morgan due to the gravitational field of a finite disk, we have obtained the corresponding solutions of the Einstein-Maxwell equations. ...

    • Highly compact surface micromachined metamaterial circuits using multilayers of low-loss Benzocyclobutene for microwave and millimeter wave applications 

      Eliecer Sr. D.; Cheng X.; Yoon, Y.K. (2012)
      This work explores the implementation of highly compact three dimensional (3D) integrable metamaterial based transmission lines on a low resistivity CMOS grade silicon substrate for microwave and millimeter wave applications. ...

    • Harmonic analysis of shear deformable orthotropic cracked plates using the Boundary Element Method 

      Useche Vivero, Jairo; Albuquerque E.L.; Sollero P. (2012)
      In this work, the modal and harmonic analysis of orthotropic shear deformable cracked plates using a direct time-domain Boundary Element Method formulation based on the elastostatic fundamental solution of the problem is ...

    • Perturbing the boundary conditions of the generator of a cosine family 

      Alvarez-Pardo, E. (2012)
      Let A be a densely defined, closed linear operator (which we shall call maximal operator) with domain D(A) on a Banach space X and consider closed linear operators L:D(A)→∂X and Φ:D(A)→∂X (where ∂X is another Banach space ...

    • Ultrasound image enhancement: A review 

      Contreras Ortiz, Sonia Helena; Chiu T.; Fox M.D. (2012)
      Medical ultrasound imaging uses pulsed acoustic waves that are transmitted and received by a hand-held transducer. This is a mature technology that it is widely used around the world. Among its advantages are that it is ...

    • VSC with direct PI power control for frequency compensation in a microgrid: A PBC approach 

      Gil-González, Walter; Sanchez S.; Montoya O.D.; Garrido Arévalo, Víctor Manuel (Institute of Electrical and Electronics Engineers Inc., 2019)
      The power systems with low inertia such as microgrids require advanced control strategies to improve their performance. These type of grids use voltage source converters to interconnect renewable energy sources and storage ...

    • Development and/or change of the notion of permanent object and operative causality: Empirical evidence in the frst year of life 

      Sánchez H.; Guevara M.; Cerchiaro E. (Fundacion para el Avance de la Psicologia, 2013)
      This study examines the notion of permanent object during the first year of life, taking into account the controversy of two approaches about the nature of change: developmental change and cognitive change. Using a ...

    • Static secure page allocation for light-weight dynamic information flow tracking 

      Santos J.C.M.; Fei Y.; Shi Z.J. (2012)
      Dynamic information flow tracking (DIFT) is an effective security countermeasure for both low-level memory corruptions and high-level semantic attacks. However, many software approaches suffer large performance degradation, ...

    • Supplier selection service-case study UTB 

      Mendoza G.V.; Cruz Y.P. (2012)
      Supplier selection supported by methods based on computational tools are fundamental enterprise actions. This paper proposes the development of supplier selection model supported on a computational tool, using the purchasing ...

    • A multi-user remote academic laboratory system 

      Barrios A.; Panche S.; Duque M.; Grisales V.H.; Prieto F.; Villa Ramírez, José Luis; Chevrel P.; Canu M. (2013)
      This article describes the development, implementation and preliminary operation assessment of Multiuser Network Architecture to integrate a number of Remote Academic Laboratories for educational purposes on automatic ...

    • Male facial anthropometry and attractiveness 

      Soler C.; Kekäläinen J.; Núñez M.; Sancho M.; Núñez J.; Yaber Goenaga, Iván; Gutiérrez R. (2012)
      The symmetry and masculinity of the face are often considered important elements of male facial attractiveness. However, facial preferences are rarely studied on natural faces. We studied the effect of these traits and ...

    • An omnidirectional wrappable compact patch antenna for wireless endoscope applications 

      Cheng X.; Wu J.; Blank R.; Senior D.E.; Yoon, Y.K. (2012)
      An inductively loaded compact patch antenna for a radiation frequency of 433 MHz is designed taking into consideration a human-body model and fabricated on a flexible liquid crystalline polymer (LCP) substrate, which is ...

      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.