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High-level convergence order accelerators of iterative methods for nonlinear problems
(Elsevier B.V., 2025) Cordero, Alicia; Rojas-Hiciano, Renso V.; Torregrosa, Rojas-Hiciano; Vassileva, Maria P.
We present an efficient strategy to increase, under certain conditions, the order of convergence of iterative methods to solve nonlinear systems of equations. We analytically compare the new accelerator with others and establish the conditions under which this technique is more efficient. We perform an analysis of the efficiency of some one-step accelerators that increase the convergence order by two units. New concepts about efficiency are introduced which allow us to compare different iterative schemes from other points of view. We demonstrate that our proposal is a good alternative to the existing ones. As a consequence, we propose two new maximally efficient, damped Newton-Traub type schemes of order 5 and 6. These are an improvement of two other maximally efficient methods. Their numerical performance is better than that of known methods of the same order, and we find that it is a very economical way to achieve high order. Some numerical examples confirm the theoretical results.
Memorias de la conferencia valorización de residuos agrícolas y sargazo
(Santo Domingo, República Dominicana: Instituto Tecnológico de Santo Domingo (INTEC); SARGARD; Embajada de Francia en República Dominicana; Ministère de l'Europe et des Affaires Étrangères, 2024)
Palabras de los editores iii -- Palabras de embajadora de Francia en República Dominicana, excelentísima Sra. Sonia Barbry vii -- Palabras rectora en funciones de INTEC, maestra Alliet Ortega XI -- Programa 3 -- Modular technology for the production of a standardized raw material from sargassum for industrial applications 7 -- Prevention and perspectives of valorization of sargassum in the french West Indies 9 -- Valorization of Sargassum algae: towards bio-based materials for environmental and economic sustainability 11 -- Effect of unconventional pretreatments on the morphology and biochemical methane potential of Sargassum spp 13 -- Preparation of carbon materials, biochars and activated carbon from Caribbean agricultural biomass and sargassum seaweeds for different applications: water treatment, pesticide sequestration and energy storage 15 -- Valorization of sargassum biomass for the fabrication of porous carbon electrodes and implementation in 3d-printed capacitive deionization cells 17 -- Use of sic and biochar as microwave absorbers during the pyrolysis of sargassum in a single-mode microwave cavity 19 -- Obtaining biofilters for water treatment from sargassum combined with other biomass sources 21 -- Harnessing invasive seaweed: the Bluetech revolution transforming the Caribbean’s future 23 -- Sargassum liquid bio-fertilizer: production, characterization and evaluation in organic banana culture 27 -- Evaluation of the physicochemical, microbiological, and ecotoxicological properties of two sargassum-based liquid biofertilizers for industrial Solanum lycopersicum production 29 -- Sargassum-based fertilizers: Obtaining and evaluating organic fertilizer based on Sargassum in agricultural crops 31 -- Biorefinery approach for the valorization of agricultural residues 33 -- The Phytobokaz Laboratory and the concept of phytosymbiosis 35 -- Production of platform molecules from cellulosic and lignocellulosic materials by fermentation 37 -- Potential of biorefineries from agricultural residues in Dominican Republic 39 -- Use of twin-screw extrusion technology for the biorefining of agro-resources 41 -- First experiences in utilizing agricultural residues at INTEC’s innovation unit for bioplastics and biomaterials 43 -- Development of bricking technologies for cocoa husk for use as a renewable energy source and animal feed 45 -- Experiences in bioresources valorization: combining experimental work and mathematical modeling 47 -- Bioprocesses applied to obtain biofertilizers from organic coffee waste in vegetable production 49 -- Lista de contactos 50 -- Fotograma del evento y de las visitas 52 – Agradecimientos 61
Usability of a virtual reality resource for oscilloscope teaching : expert assessment
(Universidad Pablo de Olavide, 2025) Chaljub-Hasbún, Jeanette; Cabero Almenara, Julio; Michel-Acosta, Pamela; Bello, Rafael; Pepín, Josefina
Assessment of a sargassum-based liquid biofertilizer for enhanced banana cultivation in small-scale family farms
(Elsevier, 2025) Rodríguez Rodríguez, Yaset
The substantial influxes of pelagic Sargassum spp. along Caribbean coasts pose environmental challenges for the region's countries, but also offer opportunities for sustainable valorization. This research develops and evaluates a Sargassum-Based Liquid Biofertilizer (SBLB) produced via anaerobic fermentation, uniquely reducing heavy metal content (e.g., arsenic from 61.6 to 4.08 mg/kg) while retaining beneficial nutrients and microorganisms. This biofertilizer was applied to banana cultivation in Dominican small-scale family farms, SBLB enhanced leaf emission (p < 0.05 in two of three farms) compared to a traditional biofertilizer (BLB) and maintained Black Sigatoka disease below intervention thresholds, matching BLB performance. Chemical and microbiological analyses confirmed SBLB’s safety and efficacy, positioning it as a sustainable alternative to chemical fertilizers. This approach mitigates Sargassum waste and supports organic farming, offering a replicable model for coastal agricultural systems.
Pensar el país desde la academia : el legado de Julio Sánchez Maríñez
(Santo Domingo : Acento, 2025) Toribio, Magaly
Necesidad de más voces como la suya. Más líderes que comprendan que la educación no es un gasto, sino una inversión de larga duración. Que las aulas son más poderosas que las armas, y que el saber compartido es el único legado verdaderamente transformador.