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Mostrando ítems 1305-1324 de 1410
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The societal context of professional practice: Examining the impact of politics and economics on journalistic role performance across 37 countries
(Cartagena de IndiasCampus TecnológicoComunicación Social, 2024-01-30)The impact of socio-political variables on journalism is an ongoing concern of comparative research on media systems and professional cultures. However, they have rarely been studied systematically across diverse cases, ... -
The state of optics research in Colombia: a scientometric analysis
(Cartagena de Indias, 2022-03-05)Although there is a perception in the community that the state of optics research in Colombia has reached a mature state with international recognition, to date, there is no study that supports this view quantitatively. We ... -
The use of infrared spectroscopy and machine learning tools for detection of Meloidogyne infestations
(Cartagena de Indias, 2020-08-01)Plant parasitic nematodes are generally soilborne pathogens that attack plants and cause economic losses in many crops. The infested plants show nonspecific symptoms or, often, are symptomless; therefore, diagnosis is ... -
Theoretical–Experimental Study of the Action of Trace Amounts of Formaldehyde, Propionaldehyde, and Butyraldehyde as Inhibitors of the Ziegler–Natta Catalyst and the Synthesis of an Ethylene–Propylene Copolymer
(Cartagena de IndiasCampus Tecnológico, 2023-02-22)The copolymer synthesis process can be affected by failures in the production process or by contaminating compounds such as ketones, thiols, and gases, among others. These impurities act as an inhibiting agent of the ... -
Thermal Analysis of a Parabolic Trough Collectors System Coupled to an Organic Rankine Cycle and a Two-Tank Thermal Storage System: Case Study of Itajubá-MG Brazil
(Cartagena de IndiasCampus Tecnológico, 2022-11-04)settingsOrder Article Reprints Open AccessArticle Thermal Analysis of a Parabolic Trough Collectors System Coupled to an Organic Rankine Cycle and a Two-Tank Thermal Storage System: Case Study of Itajubá-MG Brazil by ... -
Thermal and Morphological Characterization of Native and Plasticized Starches of Sweet Potato (Ipomoea batatas) and Diamante Yam (Dioscorea rotundata)
(Cartagena de Indias, 2020-09-18)The objective of this study is to determine the morphological, physicochemical, and thermal properties of starches from two species of tubers, Ipomoea batatas (SP) and Dioscorea rotundata (DY), as well as the influence of ... -
Thermal Energy Replacement Potential in a Slaughter Plant From Rumen Pellets
(Cartagena de IndiasCampus Tecnológico, 2020-11-19)In this work, steam generation was studied using natural gas or rumen as energy sources in a slaughter plant that sacrifices 7500 cattle per month, with consumption 0.5749 kg/s of saturated steam at 624 kPa. For a slaughtered ... -
Thermoeconomic analysis of pvc production plant reactors cooling system
(American Society of Mechanical Engineers (ASME), 2017)In this work the results of the research made to PVC production plant reactors cooling system are included. The heat generated in the reactor must be removed to maintain its temperature at an optimal range between 50 and ... -
Thermoeconomic analysis of wheat flour agroindustrial plant
(American Society of Mechanical Engineers (ASME), 2015)This paper presents the development of an exergy and thermoeconomic analysis of a wheat flour agro-industrial plant, which was aimed to evaluate the energy use and establish the operation cost of its components, and to ... -
Thermoeconomic indicators ofair conditioning in a river ship to change the configuration of their thermal insulation
(American Society of Mechanical Engineers (ASME), 2014)This work has as object of study the energy of a river ship air conditioning system performance, using fiberglass, polyurethane or rockwool as insulation. Thermoeconomics Indicators based on second law of thermodynamics ... -
Thermoplastic Starch (TPS)/Polylactic Acid (PLA) Blending Methodologies: A Review
(Cartagena de IndiasCampus TecnológicoIngeniería Mecánica, 2021-06-17)Polylactic acid (PLA) and thermoplastic starch (TPS) are biodegradable polymers of biological origin, and the mixture of these polymers has been studied due to the desirable mechanical properties of PLA and the low processing ... -
Three-dimensional analysis of air-admission orifices in pipelines during hydraulic drainage events
(Cartagena de Indias, 2022-11-07)Air valves operate as protection devices in pipelines during drainage processes in order to mitigate vacuum pressures and control the transient flows. Currently, different authors have proposed one-dimensional models to ... -
Three-dimensional multimodal medical imaging system based on freehand ultrasound and structured light
(Cartagena de Indias, 2021-05-21)We propose a three-dimensional (3D) multimodal medical imaging system that combines freehand ultrasound and structured light 3D reconstruction in a single coordinate system without requiring registration. To the best of ... -
Three-dimensional simulation of transient flows during the emptying of pipes with entrapped air
(Cartagena de IndiasCampus Tecnológico, 2023-04-01)Two-and three-dimensional analyses of transient flows considering the air-water interaction have been a challenge for researchers due to the complexity in the numerical resolution of the multiphase during emptying in ... -
Through-glass interposer integrated high quality RF components
(Institute of Electrical and Electronics Engineers Inc., 2014)High quality and compact RF devices, using the half mode substrate integrated waveguide (HMSIW) architecture loaded with a complementary split ring resonator (CSRR), are implemented on a glass interposer layer, which ... -
Time-Domain Analysis for Current Control in Single-Phase Distribution Networks Using SMES Devices With PWM-CSCs
(Taylor and Francis Inc., 2018)This paper presents a time-domain analysis for current control in single-phase distribution networks using superconducting magnetic energy storage devices connected through pulse-width modulated current source converters. ... -
To tax or not to tax sin goods: that’s the question for emerging economies
(Cartagena de Indias, 2023)In times of crisis and budgetary pressures, world governments (specially from emerging economies) look more decisively for alternative sources of income generation. One such alternative is the so-called “sin taxes’’. Many ... -
Topological and Differential Invariants of Singularities of Contact Structure on a Three-Dimensional Manifold
(Cartagena de IndiasCampus Tecnológico, 2020-12)A contact structure on a three-dimensional manifold is a two-dimensional distribution on this manifold which satisfies the condition of complete non-integrability. If the distribution fails to satisfy this condition at ... -
Topological Invariants of Principal G-Bundles with Singularities
(Pleiades Publishing, 2018)principal G-bundle with singularities is a principal bundle π: P¯ → M with structure group G¯ which reduces to a subgroup G ⊂ G¯ on the set M \ Σ, where M is an n-dimensional compact manifold and Σ ⊂ M is a k-dimensional ... -
Toward an adaptive protection scheme in active distribution networks: Intelligent approach fault detector
(Cartagena de Indias, 2021-01)Conventional protection schemes have proven insufficient for the protection of Active Distribution Networks (ADN). Novel protection schemes with an adaptive approach should be developed to guarantee the protection of ADN ...
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.