Buscar
Mostrando ítems 91-100 de 326
Motion of test particles in the field of a naked singularity
(American Physical Society, 2016)
We investigate the motion of test particles in the gravitational field of a static naked singularity generated by a mass distribution with a quadrupole moment. We use the quadrupole metric (q metric) which is the simplest ...
Test particles in a magnetized conformastatic spacetime
(American Physical Society, 2016)
A class of exact conformastatic solutions of the Einstein-Maxwell field equations is presented in which the gravitational and electromagnetic potentials are completely determined by a harmonic function. We derive the ...
Colombian Andean thermal springs: reservoir of thermophilic anaerobic bacteria producing hydrolytic enzymes
(Springer Tokyo, 2019)
Anaerobic cultivable microbial communities in thermal springs producing hydrolytic enzymes were studied. Thermal water samples from seven thermal springs located in the Andean volcanic belt, in the eastern and central ...
Accounting for attitudes on parking choice: An integrated choice and latent variable approach
(Elsevier Ltd, 2018)
The well-differentiated impact that parking supply options produce on congestion, pollution and land consumption arouses the interest of policy makers for a better understanding of car user's behavior when choosing a parking ...
Current control mode in PV systems integrated with DC-DC converters for MPPT: An IDA-PBC approach
(IEEE Computer Society, 2018)
In this paper, an interconnection and damping assignment passivity-based control (IDA-PBC) theory is employed to obtain maximum power point tracking (MPPT) for a photovoltaic (PV) module. A current control mode is selected ...
Autonomía profesional y riesgos de seguridad de los periodistas en Colombia
(Flacso Mexico, 2017)
This paper analyzes the relationship between professional autonomy and security risks of journalists in Colombia. A correlational-transversal research was conducted with a sample of 751 journalists who filled out the ...
Background intensity removal in structured light three-dimensional reconstruction
(Institute of Electrical and Electronics Engineers Inc., 2016)
In Fourier Transform Profilometry, a filtering procedure is performed to separate the desired information (first order spectrum) from other unwanted contributions such as the background component (zero-order spectrum). ...
Parental competences and child resilience in the context of displacement in Colombia
(Fundacion para la Investigacion Social Avanzada, 2018)
This paper presents results of a research that arose from the interest of studying the phenomenon of forced displacement as an adversity, which can be overcome because human beings have the competences to mitigate psychosocial ...
Optimization of convective drying assisted by ultrasound for Mango Tommy (Mangifera indica L.)
(Blackwell Publishing Inc., 2018)
Convective drying is a conventional method to prolong the shelf-life of foods that could negatively affect the product quality due to the long exposure time to high temperature. Ultrasound (US) has been used for reducing ...
An inventory model of three-layer supply chain of wood and furniture industry in the Caribbean region of Colombia
(Taylor and Francis, 2018)
This article deals with a mathematical model for multi-item inventory system under a collaborative scheme in a three-level supply chain consisting of multiple raw material suppliers, multiple manufacturers and multiple ...
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.