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A low noise stenography method for medical images with QR encoding of patient information
(SPIE, 2017)
This paper proposes an approach to facilitate the process of individualization of patients from their medical images, without compromising the inherent confidentiality of medical data. The identification of a patient from ...
Design and construction of a Power Meter to optimize usage of the Electric Power
(Institute of Electrical and Electronics Engineers Inc., 2014)
In this article, we present Electric Power Meter, a device that allows us to measure the energy consumption per electrical circuit even for each device at home. Detailed knowledge of the consumption of each device will ...
Power flow solution in direct current grids using the linear conjugate gradient approach
(2019-09-24)
The Colombian power system is being modified by the large-scale integration of renewable energy resources and energy storage systems, in conjunction with the microgrid concept that originates the possibility of alternating ...
Voice compression using discrete cosine transform and wavelet transform
(Institute of Physics Publishing, 2019)
Compressing information, such as voice, allows freeing up memory space, better utilizing bandwidth, in other words taking advantage of resources more efficiently in a time where technologies such as Voice over Internet ...
Voltage stability margin in DC grids with CPLs: A recursive Newton-raphson approximation
(2019-03-11)
This express brief addresses the voltage collapse problem in direct-current (dc) networks by using a recursive heuristic search algorithm based on the Newton-Raphson method. The determinant of the Jacobian matrix in the ...
A new two-way artificial boundary condition for wave propagation
(American Institute of Aeronautics and Astronautics Inc, AIAA, 2017)
We propose a new formulation of a two-way artificial boundary condition for the wave equation in mixed form. We justify appropriately the idea behind the formulation of the two-way artificial boundary condition. To exhibit ...
Cultural participation in the main Colombian cities, 2008-2015
(Alexandru Ioan Cuza University of Iasi, 2019)
This paper aims to explain the evolution of the cultural participation in Colombia between 2018 and 2015, and to empirically analyse the factors associated to the decision of participating in cultural activities in the ...
α-bandlimited diffuser in fractional Fourier optics
(SPIE, 2016)
We propose a method for calculating appropriate α-band limited diffusers using the fractional Fourier transform. In order to do this, we implement a method for performing a numerical interpolation in the fractional Fourier ...
Sustainable boat transportation throughout electrification of propulsion systems: Challenges and opportunities
(Institute of Electrical and Electronics Engineers Inc., 2019)
Global use of carbon-based fuels increased by 1.6 % in 2017 and continued increasing in 2018, after managing to maintain emissions flat between 2014-2017. This trend deviates from the emissions trajectory required to fulfill ...
Diffuser in Fractional Fourier Optics
(OSA - The Optical Society, 2016)
We propose a method for calculating a bandlimited diffuser with smooth spectrum in the Fresnel domain without any 2p phase ambiguities using the fractional Fourier transform. Such diffusers are necessary to avoid problems ...
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.