Investigaciones: Envíos recientes
Mostrando ítems 481-500 de 1465
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A New Route of Valorization of Petrochemical Wastewater : Recovery of 1,3,5-Tris (4-tert-butyl-3-hydroxy-2,6-dimethyl benzyl)–1,3,5-triazine-2,4,6-(1H,3H,5H)-trione (Cyanox 1790) and Its Subsequent Application in a PP Matrix to Improve Its Thermal Stability
(Cartagena de IndiasCampus Tecnológico, 2023-02-21)The various chemicals in industrial wastewater can be beneficial for improving its circularity. If extraction methods are used to capture valuable components from the wastewater and then recirculate them throughout the ... -
Characterization of the Morphological and Chemical Profile of Different Families of Microplastics in Samples of Breathable Air
(Cartagena de IndiasCampus Tecnológico, 2023-01-20)Microplastic (MP) contamination has become a problem of great interest to the community at large. The detection of these particles in different ecosystems and foods has been the subject of study. However, the focus of these ... -
Cambios en el periodismo y su impacto en la autonomía profesional: evidencia del estudio The Worlds of Journalism en siete países de América LatinaA New Route of Valorization of Petrochemical Wastewater: Recovery of 1,3,5-Tris (4-tert-butyl-3-hydroxy-2,6-dimethyl benzyl)–1,3,5-triazine-2,4,6-(1H,3H,5H)-trione (Cyanox 1790) and Its Subsequent Application in a PP Matrix to Improve Its Thermal Stability
(Cartagena de IndiasCampus Tecnológico, 2023-02-21)The various chemicals in industrial wastewater can be beneficial for improving its circularity. If extraction methods are used to capture valuable components from the wastewater and then recirculate them throughout the ... -
The DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation
(Cartagena de Indias, 2023-05-26)Over the next 5 yr, the Dark Energy Spectroscopic Instrument (DESI) will use 10 spectrographs with 5000 fibers on the 4 m Mayall Telescope at Kitt Peak National Observatory to conduct the first Stage IV dark energy galaxy ... -
Quantitatively relating cosmic rays intensities from solar activity parameters based on structural equation modeling
(Cartagena de Indias, 2023-03-06)Cosmic rays measured through neutron monitors on Earth’s surface have a strong correlation with the number of sunspots on the solar photosphere. Other indices that affect the dynamics of the heliosphere and distortions ... -
The DESI Survey Validation: Results from Visual Inspection of Bright Galaxies, Luminous Red Galaxies, and Emission-line Galaxies
(Cartagena de Indias, 2023-01-20)The Dark Energy Spectroscopic Instrument (DESI) Survey has obtained a set of spectroscopic measurements of galaxies to validate the final survey design and target selections. To assist in these tasks, we visually inspect ... -
Demand Side Management Studies on Distributed Energy Resources: A Survey
(Cartagena de Indias, 2021)The number of distributed environmentally friendly energy sources and generators necessitates new operating methods and a power network board to preserve or even increase the efficiency and quality of the power supply. ... -
Studies of Endocrine Disruptors: Nonylphenol and Isomers in Biological Models
(Cartagena de IndiasCampus TecnológicoIngeniería Ambiental, 2023-04-14)Abstract Certain emerging pollutants are among the most widely used chemicals globally, causing widespread concern in relation to their use in products devoted to cleaniness and asepsis. Nonylphenol ethoxylate (NPEOn) 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 ... -
Two-dimensional simulation of emptying manoeuvres in water pipelines with admitted air
(Cartagena de IndiasCampus TecnológicoIngeniería Civil, 2023-05-09)This study examines the impact of sub-atmospheric pressures in water pipelines during emptying manoeuvres with air admitted. Previous research has looked at this issue but has not studied it in detail. This research presents ... -
Quantification of the Synthetic Phenolic Antioxidant Cyanox 1790 in Bottled Water with SPE-HPLC/MS/MS and Determination of the Impact of the Use of Recycled Packaging on Its Generation
(Cartagena de IndiasCampus Tecnológico, 2023-02-28)One route of exposure to SPAs is through bottled water since the polymers used to make plastic bottles contain these SPAs, which migrate from the plastic to the water. Solid-phase extraction (SPE), HPLC-MS, FTIR, and DSC ... -
Application of Pyrolysis for the Evaluation of Organic Compounds in Medical Plastic Waste Generated in the City of Cartagena-Colombia Applying TG-GC/MS
(Cartagena de IndiasCampus Tecnológico, 2023-03-11)In this study, the thermal degradation and pyrolysis of hospital plastic waste consisting of polyethylene (PE), polystyrene (PS), and polypropylene (PP) were investigated using TG-GC/MS. The identified molecules with the ... -
A new Valorization Route of Petrochemical Wastewater: Recovery of Phenolic Derivatives and their Subsequent Application in a PP Matrix for the Improvement of their Durability in Multiple Applications
(Cartagena de IndiasCampus Tecnológico, 2023-02-16)Wastewater from industrial processes contains different compounds that can be of great use to improve its circularity. The potential of wastewater can be exploited by applying extraction techniques to obtain compounds of ... -
Optimal Integration of Photovoltaic Systems in Distribution Networks from a Technical, Financial, and Environmental Perspective
(Cartagena de IndiasCampus Tecnológico, 2023-01-03)Due to the increasing demand for electricity around the world, different technologies have been developed to ensure the sustainability of each and every process involved in its production, transmission, and consumption. ... -
An Effective Power Dispatch of Photovoltaic Generators in DC Networks via the Antlion Optimizer
(Cartagena de IndiasCampus Tecnológico, 2023-01-27)This paper studies the problem regarding the optimal power dispatch of photovoltaic (PV) distributed generators (DGs) in Direct Current (DC) grid-connected and standalone networks. The mathematical model employed considers ... -
Optimal Operation of PV Sources in DC Grids for Improving Technical, Economical, and Environmental Conditions by Using Vortex Search Algorithm and a Matrix Hourly Power Flow
(Cartagena de IndiasCampus Tecnológico, 2022-12-26)This document presents a master–slave methodology for solving the problem of optimal operation of photovoltaic (PV) distributed generators (DGs) in direct current (DC) networks. This problem was modeled using a nonlinear ... -
InContext: Comparativa del aprendizaje con el uso de una aplicación móvil entre estudiantes mexicanos y colombianos
(Cartagena de Indias, 2023-05-01)La aplicación móvil InContext (Lerma-Noriega, 2020) es una herramienta que apoya la creación de textos entre estudiantes universitarios. Su objetivo principal es proporcionar apoyos que les permitan a los estudiantes emplear ... -
Multiclass Land Use and Land Cover Classification of Andean Sub-Basins in Colombia with Sentinel-2 and Deep Learning
(Cartagena de IndiasCampus Tecnológico, 2023-05-11)Land Use and Land Cover (LULC) classification using remote sensing data is a challenging problem that has evolved with the update and launch of new satellites in orbit. As new satellites are launched with higher spatial ... -
Linking PM10 and PM2.5 Pollution Concentration through Tree Coverage in Urban Areas
(Cartagena de Indias, 2023-03-16)Particulate matter, PM10 and PM2.5, represents common air pollutants in cities and constitute a considerable threat to public health impacting daily activity of people living in city. In large cities, the main sources of ... -
Suicide risk and media consumption in the COVID-19 pandemic in Colombia
(Cartagena de IndiasCampus TecnológicoComunicación Social, 2023-01-19)The media can play an important role in suicide prevention and mental health care, especially in a country like Colombia, affected by an internal armed conflict, and with worrying cases of suicide that increased during the ...
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.
