Buscar
Mostrando ítems 141-150 de 547
Application of the vortex search algorithm to the phase-balancing problem in distribution systems
(2021-02-26)
This article discusses the problem of minimizing power loss in unbalanced distribution systems through phase-balancing. This problem is represented by a mixed-integer nonlinear-programming mathematical model, which is ...
Reduction of losses and operating costs in distribution networks using a genetic algorithm and mathematical optimization
(2021-02-09)
This study deals with the minimization of the operational and investment cost in the distribution and operation of the power flow considering the installation of fixed-step capacitor banks. This issue is represented by a ...
Girls Do Not Sweat: the Development of Gender Stereotypes in Physical Education in Primary School
(2020-06-27)
Despite efforts towards gender equality, from an early age, girls practice sport less than boys. Explaining this is paramount to psychology. Stereotypes about gender-appropriate behaviour play a key role in doing physical-sports ...
Classical simple Lie 2-algebras of odd toral rank and a contragredient Lie 2-algebra of toral rank 4
(2021-04-29)
After the classification of simple Lie algebras over a field of characteristic p > 3, the main problem not yet solved in the theory of finite dimensional Lie algebras is the classification of simple Lie algebras over a ...
On some families of subsemigroups of a numerical semigroup
(2020-04-07)
To a given numerical semigroup S we associate a family of subsemigroups {휕nS}, n ∈ ℕ, that permits us to understand some of the structure of S. We characterize this family in case S is a supersymmetric numerical semigroup ...
Infrastructure and rurality: Challenges for sustainable economic development in Latin America
(2020)
Latin America is a region with a great environmental and cultural diversity; however, most of its countries have high levels of poverty and inequality, characteristics that are accentuated in rural areas. This paper ...
¿Qué es y hacia dónde va la fotografía?
(2021-07-01)
The role of energy storage and cross-border interconnections for increasing the flexibility of future power systems : the case of Colombia
(2021-04-20)
The rapid expansion of renewable energy technologies in the electricity sector
introduces new significant challenges for power systems due to their high
intermittency. Therefore, more flexibility is needed to ensure that ...
Network resource mobilisation limitations and the alliance portfolio network
(2021-03-11)
Purpose –The purpose of this study is to examine how access and mobilisation of network resources influence a firm’s performance. It has been established that alliance portfolio (AP) network parameters shape the access to ...
Phakopsora pachyrhizi is the major pathogen associated with soybean rust in Colombia
(2021-03-26)
Soybean crops grown in the plains of eastern Colombia have been affected by the incidence of rust. This disease, still officially regarded as American soybean rust (caused by Phakopsora meibomiae) by the Colombian Department ...
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.