285 results on '"José A. Hoyos"'
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2. Morbidity associated with emergency surgery versus scheduled surgery in patients with placenta accreta spectrum
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Juan José Saldarriaga-Hoyos, Daniela Sarria-Ortiz, Valentina Galindo-Velasco, Luisa Fernanda Rivera-Torres, and Albaro José Nieto-Calvache
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Placenta accreta ,Morbidity ,Emergencies ,Obstetric surgical procedures ,Gynecology and obstetrics ,RG1-991 - Abstract
Abstract Objective This study aims to evaluate the clinical outcomes of surgical management for placenta accreta spectrum in a Latin American reference hospital specializing in this condition. The evaluation involves a comparison between surgeries performed on an emergent and scheduled basis. Methods A retrospective cohort study was conducted on patients with placenta accreta spectrum who underwent surgery between January 2011 and November 2021 at a hospital in Colombia, using data from the institutional PAS registry. The study included patients with intraoperative and/or histological confirmation of PAS, regardless of prenatal suspicion. Clinical outcomes were compared between patients who had emergent surgeries and those who had scheduled surgeries. Descriptive analysis involved summary measures and the Shapiro-Wilk test for quantitative variables, with comparisons made using Pearson’s Chi-squared test and the Wilcoxon rank sum test, applying a significance level of 5%. Results A total of 113 patients were included, 84 (74.3%) of them underwent scheduled surgery, and 29 (25.6%) underwent emergency surgery. The emergency surgery group required more transfusions (72.4% vs 48.8%, p=0.047). Patients with intraoperative diagnosis of placenta accreta spectrum (21 women, 19.5%) had a greater volume of blood loss than patients taken into surgery with known presence of placenta accreta spectrum (3500 ml, IQR 1700 – 4000 vs 1700 ml, IQR 1195-2135. p
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- 2024
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3. Effect of extrusion cooking on physical and thermal properties of instant flours: a review
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Remigio Yamid Pismag, Juan David Rivera, José Luis Hoyos, Jesús Eduardo Bravo, and Diego Fernando Roa
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precooked flour ,process parameters ,physical properties ,instant flour ,drum dry ,spray dry ,Nutrition. Foods and food supply ,TX341-641 ,Food processing and manufacture ,TP368-456 - Abstract
The production of instant flour constitutes a fast-expanding sector, and, this is an innovative area, that is being modified adjusting continually its methodologies to enhance production efficiency, optimizing its resources, fostering innovation in its applications, and increasing its economic income. Among the methods widely cited for precooked flours production are spray drying, drum drying, and extrusion cooking, the latter emerging as a high-potential and versatile solution to produce such commodities. In this regard, a comprehensive understanding of the extrusion process, its mechanical principles, and its effects on the physical characteristics of extruded raw materials is necessary. Analyzing process parameters (specifical mechanical energy and mean residence time) is essential to achieve the desired outcomes. Furthermore, it was analyzed the effect of the process modification conditions (temperature, screw speed, and moisture content) on the physical characteristics of the extruded instant flours. This review offers insights into the most reported system parameters as Specifical Mechanical Energy (SME), Pressure, Torque and, physical properties assessed in different instant flour obtained by extrusion such as Water Absorption Index (WAI), Water Solubility Index (WSI), Swelling Power (SP), Rehydration Capacity, Wetting Capacity, Sinking, Dispersibility, Pasting properties, Thermal properties, and Color. The review summarized and discussed the behavior of the hygroscopic properties and the water affinity of different instant flours obtained by extrusion.
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- 2024
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4. Effect of extrusion cooking on the chemical and nutritional properties of instant flours: a review [version 2; peer review: 1 approved with reservations]
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Remigio Yamid Pismag, María Paula Polo, José Luis Hoyos, Jesús Eduardo Bravo, and Diego Fernando Roa
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Review ,Articles ,precooking ,instant powders ,instant preparation ,instant consumption - Abstract
Satisfying the nutritional requirements of consumers has made food industries focus on the development of safe, innocuous, easy-to-prepare products with high nutritional quality through efficient processing technologies. Extrusion cooking has emerged as a prominent technology associated with the nutritional and functional attributes of food products. This review aims to establish a theoretical framework concerning the influence of extrusion parameters on the functional and nutritional properties of precooked or instant flours, both as end-products and ingredients. It highlights the pivotal role of process parameters within the extruder, including temperature, screw speed, and raw materials moisture content, among others, and elucidates their correlation with the modifications observed in the structural composition of these materials. Such modifications subsequently induce notable changes in the ultimate characteristics of the food product. Detailed insights into these transformations are provided within the subsequent sections, emphasizing their associations with critical phenomena such as nutrient availability, starch gelatinization, protein denaturation, enhanced in vitro digestibility, reduction in the content of antinutritional factors (ANFs), and the occurrence of Maillard reactions during specific processing stages. Drawing upon insights from available literature, it is concluded that these effects represent key attributes intertwined with the nutritional properties of the end-product during the production of instant flours.
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- 2024
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5. Effect of extrusion cooking on the chemical and nutritional properties of instant flours: a review [version 2; peer review: 2 approved, 1 approved with reservations]
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Jesús Eduardo Bravo, Diego Fernando Roa, María Paula Polo, José Luis Hoyos, and Remigio Yamid Pismag
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precooking ,instant powders ,instant preparation ,instant consumption ,eng ,Medicine ,Science - Abstract
Satisfying the nutritional requirements of consumers has made food industries focus on the development of safe, innocuous, easy-to-prepare products with high nutritional quality through efficient processing technologies. Extrusion cooking has emerged as a prominent technology associated with the nutritional and functional attributes of food products. This review aims to establish a theoretical framework concerning the influence of extrusion parameters on the functional and nutritional properties of precooked or instant flours, both as end-products and ingredients. It highlights the pivotal role of process parameters within the extruder, including temperature, screw speed, and raw materials moisture content, among others, and elucidates their correlation with the modifications observed in the structural composition of these materials. Such modifications subsequently induce notable changes in the ultimate characteristics of the food product. Detailed insights into these transformations are provided within the subsequent sections, emphasizing their associations with critical phenomena such as nutrient availability, starch gelatinization, protein denaturation, enhanced in vitro digestibility, reduction in the content of antinutritional factors (ANFs), and the occurrence of Maillard reactions during specific processing stages. Drawing upon insights from available literature, it is concluded that these effects represent key attributes intertwined with the nutritional properties of the end-product during the production of instant flours.
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- 2024
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6. Effect of extrusion cooking on the chemical and nutritional properties of instant flours: a review [version 1; peer review: 1 approved with reservations]
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Remigio Yamid Pismag, María Paula Polo, José Luis Hoyos, Jesús Eduardo Bravo, and Diego Fernando Roa
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Review ,Articles ,precooking ,instant powders ,instant preparation ,instant consumption - Abstract
Satisfying the nutritional requirements of consumers has made food industries focus on the development of safe, innocuous, easy-to-prepare products with high nutritional quality through efficient processing technologies. Extrusion cooking has emerged as a prominent technology associated with the nutritional and functional attributes of food products. This review aims to establish a theoretical framework concerning the influence of extrusion parameters on the functional and nutritional properties of precooked or instant flours, both as end-products and ingredients. It highlights the pivotal role of process parameters within the extruder, including temperature, screw speed, and raw materials moisture content, among others, and elucidates their correlation with the modifications observed in the structural composition of these materials. Such modifications subsequently induce notable changes in the ultimate characteristics of the food product. Detailed insights into these transformations are provided within the subsequent sections, emphasizing their associations with critical phenomena such as nutrient availability, starch gelatinization, protein denaturation, enhanced in vitro digestibility, reduction in the content of antinutritional factors (ANFs), and the occurrence of Maillard reactions during specific processing stages. Drawing upon insights from available literature, it is concluded that these effects represent key attributes intertwined with the nutritional properties of the end-product during the production of instant flours.
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- 2023
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7. Development of a composite based on polylactic acid and lignocellulosic waste: new packaging for meat food storage
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Karen Sofia Muñoz-Pabon, Héctor Samuel Villada Castillo, José Luis Hoyos Concha, Alfredo A. Ayala Aponte, and José Fernando Solanilla Duque
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antimicrobial ,valorization ,stability ,Listeria monocytogenes ,natural preservatives ,oregano essential oil ,Nutrition. Foods and food supply ,TX341-641 ,Food processing and manufacture ,TP368-456 - Abstract
Pursuing new packaging that contributes to the safety of meat products, that can also be from renewable sources and that has adequate mechanical properties is a challenge. Therefore, this study attempted to incorporate a layer of polylactic acid (PLA) containing nisin and oregano oil extract (OEO) into biocomposites of cassava bran (CB) and coffee husk (CH) to improve their mechanical properties and enhance their antimicrobial properties. A compression molding process is carried out, the operating conditions for the preparation of the biocomposite were pressure: 40 bar, temperature: 170°C, and time: 2.5 min. The composition of the biocomposite was 80, 18, and 2% of CB, CH, and glycerol respectively, with 30% moisture. The polylactic acid (PLA) layer was added by immersion and contained nisaplin and OEO. PLA layer was evaporated in forced convection oven. Once the active packaging was obtained, inhibition in vitro against Listeria monocytogenes was performed. The packing containing OEO and nisin that showed the highest inhibition on the pathogen was used for stability analysis in pork. In order to measure changes in pork meat quality, the biocomposite with and without coating and with commercial polystyrene packaging were compared. Raw meat muscle was kept at 4° C and was tested for color, pH, moisture, and texture profile analysis (TPA) for 0, 7, 14, and 21 days. The values of the flexural test of the biocomposite were: 11.08 MPa of maximum flexural strength (σF), 1.81% of maximum deformation (εF), and 842.22 MPa of elastic modulus (EM). According to the results of in vitro inhibition, the packaging can contribute to reduce the proliferation of gram-positive microorganisms, such as L. monocytogenes. During storage, the hardness and gumminess of the meat showed significant changes, mainly in the PLA-free biocomposite. Results on pork meat showed that packaging with antimicrobials and PLA can maintain color, texture, moisture, and pH similar to commercial packaging.
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- 2023
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8. Propagating Schema Changes to Code: An Approach Based on a Unified Data Model.
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Alberto Hernández Chillón, Jesús García Molina, José Ramón Hoyos, and María-José Ortín-Ibáñez
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- 2023
9. Extrusion parameters and physical transformations of an extrudate for fish: Effect of the addition of hydrolyzed protein flour from by-products of Oncorhynchus mykiss
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José Luis Hoyos-Concha, Héctor Samuel Villada-Castillo, Diego Fernando Roa-Acosta, Alejandro Fernández-Quintero, and Rodrigo Ortega-Toro
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pellets ,Oncorhynchus mykiss ,cohesiveness ,chemical silage ,durability ,specific mechanical energy ,Nutrition. Foods and food supply ,TX341-641 ,Food processing and manufacture ,TP368-456 - Abstract
IntroductionThe food industries play a fundamental role in feeding for the functions of animal metabolism. Fish feed extrusion cooking includes process-independent factors such as temperature (°C), screw speed (RPM), throughput, feed, and moisture content that influence the final product's nutritional value and physical properties. The evidence suggests that the application of hydrolyzed protein flour (HPH) is a crucial step for the techno-functional properties of the product. Therefore, this work aimed to study the effect of hydrolyzed protein meal from silage of trout (Oncorhynchus mykiss) on the parameters of the extrusion system and their physical transformations.MethodsIn this study, the influence of hydrolyzed protein meals ranges between 10 and 30% as a substitute for fish meals. The physical properties of the extrudate were monitored, evaluating the hardness, durability, buoyancy, expansion index, and apparent density.ResultsConsistent with this, parameters such as feed composition, screw speed, moisture content, and extrusion process affected the composition and properties of the final product.DiscussionThe physical properties indicated that the hydrolyzed protein flour presented cohesiveness and decreased the mean retention time in the extruder barrel and the specific mechanical energy (SME). Hydrolyzed protein flour during the extrusion process produces pellets with high durability and low hardness due to the high porosity presented, which allows for obtaining nutritional characteristics in the extruded product.
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- 2023
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10. Sustainable and resilient development actions
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Gasperin, Daniela, primary and Guevara, Arnoldo José de Hoyos, additional
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- 2024
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11. Quinoa extruded snacks with probiotics: Physicochemical and sensory properties
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Karen Sofia Muñoz Pabon, José Luis Hoyos Concha, and José Fernando Solanilla Duque
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spore-forming bacteria ,gastrointestinal tract ,stability ,Bacillus coagulans ,non-dairy probiotics ,quinoa snack ,Nutrition. Foods and food supply ,TX341-641 ,Food processing and manufacture ,TP368-456 - Abstract
The consumption of probiotic foods has grown rapidly, and these are generally found in dairy matrices where their growth is favored. Therefore, this study aimed to develop a new probiotic snack made from quinoa and added with spore-forming probiotic bacteria in two concentrations of 0.3 and 0.35%. The probiotic was added by spraying, after the extrusion process, together with salt and oil, at 70°C under dry conditions. Bacterial viability, resistance to simulated gastric juice, physical, chemical, and sensory tests were then evaluated during 120 days of storage at room temperature (20°C) and compared to a controlled snack without probiotic. The probiotic Bacillus coagulans was tested for the molecular identification and inhibition of pathogenic bacteria. Viability assessment was remained above 107 CFU/g of snacks. The intestinal tract simulation resistance test showed a viability of 70%. The physicochemical and sensory properties evaluated had no significant changes during storage time compared to control snack. The results of the taxonomic analysis indicate that the analyzed strain has, on average, 98% identity in 98% of its length belonging to Bacillus coagulans and Bacillus badius species. The probiotic showed inhibition against pathogenic bacteria. The new snack with probiotic is stable during storage.
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- 2022
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12. La responsabilidad extracontractual del Estado: la jurisdicción contenciosa y su relevancia en la construcción de paz alrededor de los derechos fundamentales de las víctimas
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Andrés Felipe Roncancio B, José Fernando Hoyos García, and Mariana Restrepo M.
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responsabilidad extracontractual del estado ,non-contractual liability of the state ,conflicto armado interno ,internal armed conflict ,paz ,peace ,derechos fundamentales ,fundamental rights ,precedente judicial ,judicial precedent ,Law in general. Comparative and uniform law. Jurisprudence ,K1-7720 ,Social sciences (General) ,H1-99 - Abstract
Este artículo busca revisar cómo a través de la responsabilidad extracontractual del Estado pueden determinarse las condiciones de protección para los derechos fundamentales a partir del acuerdo de paz logrado entre el Estado de Colombia y las Fuerzas Armadas Revolucionarias de Colombia-Ejército Popular. Se muestra que más allá de la discusión sobre la naturaleza del conflicto armado interno, la institucionalidad ha determinado unas acciones de garantía y protección de las víctimas, en especial, en cabeza de la Corte Constitucional y el Consejo de Estado. Allí se fijan puntos de análisis que deben ser observados en el fortalecimiento institucional a partir de las acciones de reparación directa en materia de responsabilidad extracontractual del Estado. Estos elementos deben darse para garantizar con éxito la implementación del posacuerdo.
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- 2021
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13. Digestibilidad de hidrolizados enzimáticos de vísceras de origen animal en Piaractus brachypomus, Cuvier 1818
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Críspulo Perea Román, Yeny Judith Garcés Caicedo, Yerika Jeslanny Morales Barvo, Marly Andreina Jiménez Chamorro, José Luis Hoyos Concha, and Nelson José Vivas Quila
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alternativa nutricional ,principio de aditividad ,vísceras de pollo ,vísceras de cerdo ,vísceras de trucha ,cachama blanca ,hidrólisis ,digestibilidad aparente ,alimento proteico ,alimento energético ,Agriculture (General) ,S1-972 ,Biotechnology ,TP248.13-248.65 - Abstract
La alimentación representa el rubro principal en la producción piscícola, por lo anterior, se evaluó la digestibilidad mediante principio de aditividad de hidrolizados enzimáticos de origen animal en Cachama blanca (Piaractus brachypomus) como alternativa nutricional. Para ello, se utilizó una dieta control y tres mezclas, en las mezclas se sustituyó el 30 % de la dieta control por hidrolizado de vísceras de pollo, cerdo y trucha respectivamente, las cuales se suministraron a 120 cachamas con peso promedio de 145,40 ± 3,17 g, los peces fueron distribuidos mediante un diseño completamente al azar (DCA) en 12 tanques cilindro cónicos y se sometieron a colecta de heces para determinación de la digestibilidad de nutrientes, energía y la absorción de minerales. Se presentaron diferencias significativas (p
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- 2021
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14. Two-Way Coupled Aero-Structural Optimization of Stable Flying Wings
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José D. Hoyos, Camilo Echavarría, Juan P. Alvarado, Gustavo Suárez, Juliana A. Niño, and Jorge I. García
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multi-objective optimization ,multidisciplinary optimization ,particle swarm optimization ,aero-structural optimization ,flying wing ,tailless aircraft ,Motor vehicles. Aeronautics. Astronautics ,TL1-4050 - Abstract
An aero-structural algorithm to optimize a flying wing in cruise conditions for preliminary design is developed using two-way interaction between the structure and aerodynamics. A particle swarm routine is employed to solve the multi-objective optimization, aiming to reduce the weight of the structure and the aerodynamic drag at the design point. Different shapes are evaluated during the optimization process until the algorithm reaches the optimal wing aspect ratio, taper ratio, angle of incidence, twist angle, swept angle, and airfoil shape, where a six-parameters method is employed to allow reflex airfoils. A main isotropic I-beam models the wing structure. An extended vortex lattice model is employed to model the aerodynamics, along with a high-order panel method with fully coupled viscous interaction. The finite element method is used to solve the flying-wing structure under static loads. An algorithm is developed to iterate between the deflection of the wing and its impact on the aerodynamics until convergence is reached. Different constraints are implemented into the objective function to fulfil the structural criteria and the longitudinal static stability. A comparison against a baseline optimization is carried out, achieving higher efficiency and promising results in elliptical lift distribution, and a high static margin, without the use of non-constant twist. The results suggest that combining both reflex airfoils and sweep with washout is the optimal solution to reduce the drag and weight, keeping the longitudinal static stability criteria for tailless aircraft in the lower end of the transonic regime.
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- 2023
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15. Quinoa Snack Production at an Industrial Level: Effect of Extrusion and Baking on Digestibility, Bioactive, Rheological, and Physical Properties
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Karen Sofia Muñoz-Pabon, Diego Fernando Roa-Acosta, José Luis Hoyos-Concha, Jesús Eduardo Bravo-Gómez, and Vicente Ortiz-Gómez
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gluten-free quinoa snack ,functional foods ,phenolic compounds ,carotenoids ,textural properties ,digestible starch ,Chemical technology ,TP1-1185 - Abstract
This research aimed to produce gluten-free snacks on a pilot scale from quinoa flour. These snacks experienced an extrusion process, followed by baking. The effects of these technological processes on carbohydrate and protein digestibility, extractable phenolic compounds (EPP), hydrolyzable phenolic compounds (HPP), antioxidant capacity, and physical properties were evaluated in raw quinoa flour and extruded snacks. Extrusion increased digestible starch (RDS) from 7.33 g/100 g bs to 77.33 g /100 g bs. Resistant starch (RS) showed a variation of 2 g/100 g bs. It is noteworthy that protein digestibility increased up to 94.58 g/100 bs after extrusion and baking. These processes increased HPP content, while EPP and carotenoid content decreased. The samples showed significant differences (p < 0.05) in the antioxidant properties determined through the DPPH and ABTS methods. Values of 19.72 ± 0.81 µmol T/g were observed in snacks and 13.16 ± 0.2 µmol T/g in raw flour, but a reduction of up to 16.10 ± 0.68 µmol T/g was observed during baking. The baking process reduced the work of crispness (Wcr) from 0.79 to 0.23 N.mm, while the saturation (C*) was higher in baked ones, showing higher color intensity. The baking process did not influence the viscosity profile. The results in this study respond to the growing interest of the food industry to satisfy consumer demand for new, healthy, and expanded gluten-free snacks with bioactive compounds.
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- 2022
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16. Variaciones en rendimiento físico durante una temporada competitiva en jugadoras seleccionadas universitarias de soccer por posición de juego (Variations in physical performance during a competitive season in Mexican female varsity soccer players by playing position)
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Alejandro Diaz-Ochoa, Victor Manuel Gómez Renaud, José Raúl Hoyos Flores, and Germán Hernández Cruz
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Orthopedics and Sports Medicine ,Physical Therapy, Sports Therapy and Rehabilitation ,Education - Abstract
El futbol es uno de los deportes más populares a nivel mundial con un incremento reciente en el número de participantes mujeres, lo que exige un mayor rendimiento físico para esta población acorde al nivel competitivo, no obstante, los datos disponibles relacionados al rendimiento físico de futbolistas mexicanas son limitados, por lo que el objetivo de este estudio fue investigar los cambios temporales en el rendimiento físico durante una temporada competitiva en futbolistas universitarias. En el estudio participaron 19 jugadoras universitarias de futbol divididas en tres posiciones de juego (defensas, mediocampistas y delanteras). Todas completaron tres evaluaciones (T1, T2 y T3) que incluyeron: rendimiento de la resistencia aeróbica intermitente (30-15 intermittent fitness test [IFT]), altura de salto (salto contramovimiento [CMJ]), velocidad lineal (sprint de 20 y 40 m), agilidad (prueba T modificada) y fuerza máxima (1RM-SQ). En cuanto a los resultados, encontramos cambios de forma general a lo largo de la temporada donde destaca el sprint de 20-m en T2 (ES = 0.60; 90%CI: 0.22;0.97) y en 1RM-SQ en T2 (ES = 0.57; 90%CI: 0.16;0.98) y T3 (ES = 1.04; 90%CI: 0.63;1.44). Por posición los principales cambios fueron en VO2max30-15IFT en mediocampistas (ES = -0.86; 90%CI: -1.49;-0.23) en T2, así como en 1RM-SQ en todas las posiciones en T2 y T3 con cambios de moderado a grandes. La monitorización de las capacidades físicas a través de la temporada es muy importante para la elaboración de programas de entrenamiento individualizados para cada posición de juego. Palabras clave: Soccer, Femenil, 1RM, Sprint, Agilidad Abstract. Soccer is the most popular sport worldwide, with a recent increase in the number of women participating, demanding greater physical performance for this population according to the competition level. Nevertheless, available data regarding Mexican soccer players' physical performance are limited; therefore, this study aimed to investigate temporary changes in physical performance during a competitive season in university soccer players. Nineteen female players, divided into three player positions (defenders, midfielders, and forwards), participated in the study. All participants completed three evaluations (T1, T2, and T3) that included intermittent aerobic endurance performance (30-15 intermittent fitness test [IFT]), jump height (countermovement jump [CMJ]), linear speed (20-m and 40-m sprints), agility (modified T-test), and maximal strength (1RM-SQ). Regarding results, we found general changes during the season; among these, the 20-m sprint in T2 (ES = 0.60; 90% CI: 0.22; 0.97) and the 1RM-SQ in T2 (ES = 0.57; 90% CI: 0.16; 0.98) and T3 (ES = 1.04; 90%CI: 0.63;1.44) stand out. The main changes were in VO2max30-15IFT in midfielders (ES = -0.86; 90% CI: -1.49; -0.23) in T2 and 1RM-SQ in all positions in T2 and T3, with moderate to large changes. It is important to monitor physical ability during the season to prepare individualized training programs for each player's position. Keywords: Soccer, Female, 1RM, Sprint, Agility.
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- 2023
17. Quality Parameters as Modeling Language Abstractions for Context-Aware Applications: An AAL Case Study.
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José Ramón Hoyos, Davy Preuveneers, and Jesús Joaquín García Molina
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- 2017
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18. Efecto del Phlebodium Decumanum sobre el daño muscular, inflamación y cortisol durante un mesociclo precompetitivo en Selección Nacional de Voleibol
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Juan José García Verazaluce, Rafael Guisado-Barrilao, Elizabeth Llera Figueroa, Germán Hernández-Cruz, Blanca R. Rangel-Colmenero, Francisco M. Ocaña-Peinado, José Raúl Hoyos-Flores, Daniel Jerez-Mayorga, and Isabel María Guisado-Requena
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Inflammation ,Daño muscular ,Inflamación ,Muscle damage ,Respuesta inflamatoria ,Inflammatory response ,Antioxidantes ,Orthopedics and Sports Medicine ,Physical Therapy, Sports Therapy and Rehabilitation ,Cortisol ,Antioxidants ,Education - Abstract
The severe training load of a competitive mesocycle may not be assimilated correctly by athletes, and can provoke endocrine imbalance, muscle damage and inflammation. Supplementation with antioxidants such as Phlebodium Decumanum (PHL) helps protect against such imbalances. The aim of this study is to analyse the effect of PHL on the fatigue during a precompetitive mesocycle in volleyball players. Twenty-four male volleyball players were divided into two groups (experimental and control). The experimental group was supplemented with three PHL capsules in the morning and three in the afternoon for 20 days. Blood samples were taken before training, at the end of the third week and at the end of the fourth week to evaluate creatine kinase (CK), interleukin 6 (IL-6), tumour necrosis factor-alpha (TNF-α), interleukin 10 (IL-10) and cortisol. The results show the control group, the third Cortisol were significantly increased (p < .05). In the experimental group, however, a significant increase (p < .05) was only observed in the third IL-10 value. In addition, significant differences (p < .05) were observed between the control and experimental groups in the second CK. Furthermore, there were moderate variations (effect size, ES > 0.5; 90% CI) in CK, IL-6 and TNF-α. In conclusion, PHL supplementation during a precompetitive mesocycle by volleyball players protects against the muscle damage, inflammatory modulation and cortisol response caused by fatigue., Altas carga de entrenamiento de un mesociclo competitivo, pueden no ser asimiladas de forma correcta por atletas, pudiendo ocasionar desequilibrio endocrino, daño muscular e inflamación. La suplementación con antioxidantes como el Phlebodium Decumanum (PHL), puede proteger ante estos desequilibrios. El objetivo de este estudio fue analizar el efecto del PHL sobre la fatiga de un mesociclo precompetitivo en voleibolistas. Veinticuatro voleibolistas divididos en dos grupos (experimental y control) participaron en este estudio. El grupo experimental se suplementó con tres capsulas de PHL por la mañana y tres por la tarde por 20 días. Se efectuaron tomas de sangre antes del entrenamiento, al finalizar la tercera semana y al finalizar la cuarta semana para evaluar creatin kinasa (CK), interleucina 6 (IL-6), factor de necrosis tumoral-alfa (TNF-α), interleucina 10 (IL-10) y cortisol. Los resultados mostraron un aumento significativo (p < .05) en la tercera toma de Cortisol en el grupo control. El grupo experimental solo se observó un aumento significativo (p < .05) en la tercera toma para IL-10. Además, se observó una diferencia significativa (p < .05) entre los grupos para CK en la segunda toma, así como cambios moderados (ES > 0.5; 90%IC) para CK, IL-6 y TNF-α. En conclusión, la suplementación con PHL durante un mesociclo precompetitivo en jugadores de voleibol mostro efectos protectores beneficiosos sobre el daño muscular, modulación inflamatoria y respuesta del cortisol ocasionado por la fatiga., Programa para el Desarrollo Profesional Docente (PRODEP) México, Mexican Volleyball Federation, Fondo Europeo de Desarrollo Regional (FEDER) [2018/11744]
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- 2023
19. Actividad nocturna de Artibeus planirostris y A. lituratus (Chiroptera: Phyllostomidae), durante dos fases lunares en una localidad de los Andes Venezolanos
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José M. Hoyos-Díaz and Mariana Muñoz-Romo
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General Medicine - Abstract
El estudio de la fase activa de los animales permite describir sus patrones de actividad. Se ha propuesto que las diferencias entre estos patrones posibilitan la coexistencia de especies ecológicamente similares, al reducir la competencia. La luz lunar ha sido postulada como uno de los factores ambientales que afecta los patrones de actividad en organismos nocturnos. La actividad de los murciélagos frugívoros Artibeus planirostris y A. lituratus fue estudiada a través de capturas durante periodos de luminosidad lunar contrastantes, en un parche de bosque secundario en Mérida, Venezuela. El objetivo de este estudio fue determinar si la actividad nocturna es afectada por la luz lunar al describir y comparar el patrón de actividad de estas especies. Al ser especies ecológicamente similares, se podría esperar patrones de actividad distintos que posibilitarían su coexistencia. No se encontraron diferencias en la actividad de los murciélagos, y en general se capturaron individuos de ambas especies durante toda la noche. Sin embargo, es notable que en noches oscuras (luna nueva), A. planirostris tienda a ser más activo antes de medianoche y A. lituratus después de medianoche. La actividad estaría afectada por la luz lunar, ya que: (1) fueron capturados más individuos en noches oscuras que en noches luminosas y (2) esta actividad se inició una hora más tarde al anochecer y se restringió hasta la medianoche durante luna llena. Nuestras observaciones sugieren que, en las condiciones estudiadas, especies con perfiles ecológicos similares tienden a diferir en sus patrones de actividad, pero es indispensable estudiar detalladamente sus dietas para concluir sobre mecanismos particulares de disminución de competencia.
- Published
- 2022
20. Educación en cultura, tecnología e innovación: una aproximación a los impactos del programa de formación de los Laboratorios Vivos de Innovación y Cultura
- Author
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Antonio José Ortega-Hoyos, Nathaly Gómez-Gómez, and David Osorio-Vallejo
- Subjects
desarrollo comunitario ,cognición ,ciudadanía ,habilidades ,constructivismo ,aprendizaje ,Education ,Education (General) ,L7-991 - Abstract
En este artículo se exponen los principales impactos que se evidenciaron en los participantes del programa de formación desarrollado en el marco del proyecto Laboratorios Vivos de Innovación y Cultura en los municipios de Clemencia y María la Baja, en el departamento de Bolívar (Colombia). Para la investigación se utilizó una metodología cualitativa de tipo descriptivo-analítico con insumos como entrevistas, indicadores de seguimiento al proyecto y documentos internos que exponen la experiencia vivida en el desarrollo del proceso. Los impactos del programa se analizan a la luz de las capacidades humanas en relación con el objetivo del programa de formación, que buscó fortalecer las dimensiones cognoscitiva, psicomotoras y afectivas de los participantes. Entre los resultados, se encuentra que este programa contribuyó al estímulo de habilidades y capacidades sociales, al uso y la apropiación de las TIC en relación con la generación de productos culturales, y a la consolidación de las identidades individual y colectiva.
- Published
- 2020
- Full Text
- View/download PDF
21. Selection of sowing date and biofertilization as alternatives to improve the yield and profitability of the F68 rice variety
- Author
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Yeison Mauricio Quevedo-Amaya, José Isidro Beltrán-Medina, José Álvaro Hoyos-Cartagena, John Edinson Calderón-Carvajal, and Eduardo Barragán-Quijano
- Subjects
Azotobacter chroococcum ,plant growth promoters ,respiration ,biological nitrogen fixation ,photosynthetically active radiation ,night temperature ,Plant ecology ,QK900-989 - Abstract
Multiple factors influence rice yield. Developing management practices that increase crop yield and an efficient use of resources are challenging to modern agriculture. Consequently, the aim of this study was to evaluate biological nitrogen fixation and bacterial phosphorous solubilization (biofertilization) practices with the selection of the sowing date. Three sowing dates (May, July and August) were evaluated when interacting with two mineral nutrition treatments using a randomized complete block design in a split-plot arrangement. Leaf carbon balance, leaf area index, interception and radiation use efficiency, harvest index, dry matter accumulation, nutritional status, and yield were quantified. Results showed that the maximum yield was obtained in the sowing date of August. Additionally, yield increased by 18.92% with the biofertilization treatment, reaching 35.18% of profitability compared to the local production practice. High yields were related to a higher carbon balance during flowering, which was 11.56% and 54.04% higher in August than in July and May, respectively, due to a lower night temperature. In addition, a high efficient use of radiation, which in August was 17.56% and 41.23% higher than in July and May, respectively, contributed to obtain higher yields and this behavior is related to the selection of the sowing date. Likewise, a rapid development of the leaf area index and an optimum foliar nitrogen concentration (>3%) were observed. This allowed for greater efficient use of radiation and is attributed to the activity of nitrogen-fixing and phosphate solubilizing bacteria that also act as plant growth promoters.
- Published
- 2020
- Full Text
- View/download PDF
22. Editorial
- Author
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Arnoldo José de Hoyos Guevara
- Subjects
General Medicine - Published
- 2023
23. Rheological Study of an Extruded Fish Diet with the Addition of Hydrolyzed Protein Flour
- Author
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José Luis Hoyos-Concha, Héctor Samuel Villada-Castillo, Alejandro Fernández-Quintero, and Rodrigo Ortega-Toro
- Subjects
hydrolyzed protein flour ,cassava starch ,in-line rheology ,power law ,pseudoplastic ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
The extrusion of food for human and animal consumption is a unit operation that includes mixing, shearing, and force to the materials related to the rheological properties of the materials in the extruder. The present work aims to study the rheological behavior of an extruded fish diet incorporating hydrolyzed protein flour (HPF) processed by extrusion. The measurement was carried out online with a slit die rheometer, defining the rheological models and parameters that fit the process. During the extrusion process, the raw materials used were hydrolyzed protein flour, fish meal, and cassava starch. For the results, the evaluated treatments were adjusted to the Power Law, where an increase in the shear rate decreases the viscosity of the material, corresponding to a pseudoplastic behavior. The incorporation of hydrolyzed protein flour presented a significant effect on the value of n and Klp, increasing the viscosity with the increase in the percentage of inclusion of HPF. The models obtained for the prediction of the viscosity are adjusted to the system’s changes in shear rate, temperature, and humidity. The importance of the study lies in the fact that the diet developed can be applied to feed fish, and production is currently being scaled up to pilot plants for direct use by some producer communities.
- Published
- 2021
- Full Text
- View/download PDF
24. Editorial
- Author
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Arnoldo José de Hoyos Guevara
- Subjects
General Medicine - Published
- 2022
25. Características Fisiológicas y Antropométricas de Selección Estatal de Muaythai de Nuevo León, México
- Author
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Ana Durán-Suárez, Blanca Rocío Rangel-Colmenero, José Raúl Hoyos-Flores, German Hernández-Cruz, Rosa María Cruz-Castruita, and Myriam Zaraí García-Dávila
- Abstract
El rendimiento de los atletas de Muaythai se determinapor características fisiológicas y antropométricas, sin embargo, hemos encontrado un área de oportunidad en la búsqueda de estos datos, por ello, la información sobre los parámetros que deben presentar los peleadores de acuerdo a este deporte son de gran importancia. Objetivo: Conocer el estado de ánimo, síntomas gastrointestinales y sueño, así como características fisiológicas de la variabilidad de la frecuencia cardíaca, sangre, orina, composición corporal y rendimiento físico de atletas de Selección Estatal de Muaythai de Nuevo León, México rumbo a un Campeonato Nacional. Métodos: Estudio descriptivo con 17 atletas (13 hombres y 4 mujeres) de la selección estatal de Muaythai del estado de Nuevo León, México (Edad: 18.65 ± 7.33 años, talla: 168 ± 4.21 cm, entrenamiento a la semana 12.62 ± 13.90 horas, competencias/año: 3.29 ± 1.79). Al inicio, contestaron tres cuestionarios online acerca del estado de ánimo, síntomas gastrointestinales y sueño. Posteriormente, se realizó una medición de la variabilidad de la frecuencia cardíaca, toma de sangre y orina. Se evaluó la composición corporal mediante antropometría y se realizó una evaluación de salto con contramovimiento. Resultados: La orina presentó un valor de 1.028 ± 0.015 sg, así como un peso de 64.01 ± 7.03 kg y 57.38 ± 6.73 kg, % grasa de 10.11 ± 25.10% y 15.25 ± 3.27% , % músculo de 55.87 ± 5.88 y 38.86 ± 3.03 y un valor 30 ± 7.42 cm y 25.3 ± 9.08 cm en la altura de salto para hombres y mujeres respectivamente. Conclusión: Los peleadores se encuentran hipohidratados, así como con un peso y masa grasa mayor, además de una masa muscular y una altura del salto menor respecto las diversas disciplinas de combate a nivel mundial. Debido a lo anterior, es necesario establecer parámetros específicos para el Muaythai.
- Published
- 2022
26. Contact Process with Aperiodic Temporal Disorder
- Author
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Ariel Y. O. Fernandes, José A. Hoyos, and André P. Vieira
- Subjects
Statistical Mechanics (cond-mat.stat-mech) ,FOS: Physical sciences ,General Physics and Astronomy ,Condensed Matter - Statistical Mechanics - Abstract
We investigate the nonequilibrium critical behavior of the contact process with deterministic aperiodic temporal disorder implemented by choosing healing or infection rates according to a family of aperiodic sequences based on the quasiperiodic Fibonacci sequence. This family allows us to gauge the temporal fluctuations via a wandering exponent $\omega$ and put our work in the context of the Kinzel--Vojta--Dickman criterion for the relevance of temporal disorder to the critical behavior of nonequilibrium models. By means of analytic and numerical calculations, the generalized criterion is tested in the mean-field limit.
- Published
- 2023
27. The Role of Cholinesterases in Post-Exercise HRV Recovery in University Volleyball Players
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José Raúl Hoyos-Flores, Blanca R. Rangel-Colmenero, Zeltzin N. Alonso-Ramos, Myriam Z. García-Dávila, Rosa M. Cruz-Castruita, José Naranjo-Orellana, and Germán Hernández-Cruz
- Subjects
cholinesterases ,heart rate variability ,autonomic recovery mechanisms ,sympathetic–parasympathetic modulation ,postexercise recovery ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Some studies show interest in measuring heart rate variability (HRV) during post-exercise recovery. It is known that the parasympathetic system is relevant during this process, where one of the factors of this modulation is the interaction of acetylcholine and cholinesterases (ChE). However, the behavior of ChE and its relationship during recovery is little known; therefore, the objective of this study was to analyze the behavior of ChE and its relationship with recovery evaluated in HRV indicators in volleyball players. An exercise protocol with long-term and intermittent high-intensity phases was applied in nine volleyball players. HRV measurements were made, and blood samples were drawn to evaluate the ChE before exercise and after 24 and 48 h post-exercise. The results show a modification of the variables after exercises with respect to the baseline values (ChE: 1818.4 ± 588.75 to 2218.78 ± 1101.58; RMSSD: 42.64 ± 12.86 to 17.72 ± 12.55 (p < 0.05); SS: 8.76 ± 1.93 to 21.93 ± 10.05 (p < 0.01); S/PS Ratio: 0.32 ± 0.14 to 3.26 ± 3.28 (p < 0.01)), as well as recovery after 24 and 48 h with respect to postexercise (ChE: 1608.81 ± 546.88 (p < 0.05) and 1454.54 ± 580.45 (p < 0.01); RMSSD: 43.83 ± 24.50 and 46.18 ± 33.22 (p < 0.01); SS; 10.93 ± 5.16 and 11.86 ± 4.32 (p < 0.01); S/PS Ratio: 0.46 ± 0.32 and 0.50 ± 0.28 (p < 0.01)). ChE correlations (p < 0.001) were found with moderate (SS: r = 0.465) and large (RMSSD: r = −0.654; S/PS Ratio: r = 0.666) HRV indexes. In conclusion, ChE modifications are related to changes in HRV showing a very similar behavior in the case of the study subjects.
- Published
- 2021
- Full Text
- View/download PDF
28. Programming by demonstration of the sequence of tightening a nut allowing variations in tool position
- Author
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José G. Hoyos-Gutiérrez and Flavio A. Prieto-Ortiz
- Subjects
Robot programming by demonstration ,Task segmentation ,Complex tasks ,Task parameterized Gaussian Mixture model ,Petri nets. ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
A technique of programming by demonstration of a robot is proposed. Such a technique allows that a robot execute sequential or complex tasks. It uses a combination of Petri nets and task parameterized Gaussian mixture models. The first one handles the task sequence, while the second one allows variations in the position and orientation of objects involved in the task. Using a segmentation task technique, the demonstration is chunked in subtasks. With the subtasks sequence, an action list or plan is obtained and with this, a Petri net is automatically generate. Models of the templates of each subtasks and task parameterized Gaussian mixture models of the subtask that we want to allow variations are also provide to the technique. A function compare one each of the template trajectory with the task parameterized model response trajectory and the most similar indicate that instead of the template, the task parameterized model is use. Through the use of a homemade robot, which executes the task of tightening a nut, the performance of the technique is illustrated by using figures.
- Published
- 2016
- Full Text
- View/download PDF
29. Effect of the Addition of High-Protein Hydrolyzed Flour from Oncorhynchus mykiss Byproducts on the Properties of an Extruded Feed
- Author
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José Luis Hoyos-Concha, Héctor Samuel Villada-Castillo, Alejandro Fernández-Quintero, and Rodrigo Ortega-Toro
- Subjects
Chemistry ,General Chemical Engineering ,General Chemistry ,QD1-999 - Published
- 2022
30. A Single-Session Eye Movement Desensitization and Reprocessing (EMDR) Therapy Reduces Anxiety and Improves Self-confidence in Athletes with Post-traumatic Stress Associated with Injury
- Author
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Luis Felipe Reynoso-Sánchez and José Raúl Hoyos-Flores
- Abstract
Background: Stress and anxiety related to post-injury trauma in athletes is a latent problem in sport. The use of eye movement desensitization and reprocessing (EMDR) allows sports psychologists to intervene with their athletes more effectively to help them into their recovery and achieve peak sport performance. Objectives: Analyze the EMDR therapy effect in the psychophysiological responses of four athletes with stress related to a traumatic event during sports practice. Methods: Four athletes (22.25 ± 1.71 years; 11.5 ± 2.65 years of experience) participated an idiographic single-case, multiple-probe study. The Sport Psychology Department of the institution approved the study for its application, which also followed the statement of the declaration of Helsinki. The participants had been medically cleared to practice their sport after sustaining a severe injury, but they expressed significant difficulty in performing optimally yet. The Competitive State Anxiety Inventory-2RD was applied to measure the anxiety and self-confidence levels before, after and two weeks later EMDR therapy intervention. Eye movement desensitization and reprocessing standard protocol therapy was carried out to identify the dysfunctional memories to be reprocessed, address the abnormal behaviors as trauma consequences, and develop the behavioral changes to manage the trauma. Heart rate variability parameters used as biofeedback were monitored during the EMDR protocol to associate with moments of stress and relief. Data analysis was performed using the smallest worthwhile change (SWC) of Hopkins to compare the results in the different moments of the protocol and study. Results: All four athletes reported likely and most likely beneficial changes (according to the SWC) in their levels of anxiety and self-confidence after the intervention with the EMRD therapy as well as at two weeks afterward. Heart rate variability (HRV) parameters linked with parasympathetic activity were reduced and the sympathetic parameters increased their levels when the intervention protocol induced stressor memories, observing an opposite behavior when EMDR phases let the athlete be relaxed or getting relief. Conclusions: Eye movement desensitization and reprocessing is a therapy is effective to manage a sport injury related psychologic trauma. Furthermore both, LnRMSSD and LnSS parameters of the HRV can be used as a biofeedback strategy for a better efficacy of EMDR-based treatment.
- Published
- 2023
31. Microbial Biodiversity in Agricultural Production Processes
- Author
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Iván Darío Otero-Ramírez, José Luis Hoyos-Concha, Margarita del Rosario Salazar-Sánchez, Raúl Arnulfo Salazar-Sánchez, Diego Fernando Roa-Acosta, and José Fernando Solanilla-Duque
- Published
- 2023
32. Métodos de extracción, refinación y concentración de aceite de pescado como fuente de ácidos grasos omega-3
- Author
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Jeimmy Rocío Bonilla and José Luis Hoyos Concha
- Subjects
Ácidos grasos poliinsaturados ,lípidos ,purificación ,fraccionamiento ,ácido eicosapentaenóico ,ácido docosahexaenóico ,Agriculture ,Agriculture (General) ,S1-972 ,Animal culture ,SF1-1100 - Abstract
El aceite de pescado es un producto industrial de alto valor nutricional por su contenido de ácidos grasos poliinsaturados (AGPI) Omega-3, actualmente valorados por su efectos benéficos en la salud. Estudios y avances realizados desde el año 2000 en la extracción de aceite de pescado de diversas especies, su refinación y concentración de AGPI, son revisados en este artículo. Las técnicas de extracción van desde tecnologías convencionales como prensado húmedo y extracción por solventes, hasta tecnologías propuestas más recientemente como fluidos supercríticos y ensilaje de pescado. Así mismo, la refinación es realizada por métodos tradicionales, sin embargo existen nuevas tecnologías con potencial para su aplicación en aceite de pescado. Por otro lado, el interés en la concentración de AGPI Omega-3 ha crecido y varias técnicas han sido propuestas como winterización, métodos enzimáticos, fraccionamiento por fluidos supercríticos, complejación con urea, fraccionamiento por métodos cromatográficos y concentración por membranas. La información recopilada indica una tendencia a combinar diferentes tecnologías convencionales y emergentes a fin de mejorar los rendimientos y pureza del producto obtenido.
- Published
- 2018
- Full Text
- View/download PDF
33. Valoración económica del uso de ensilaje de residuos piscícolas en la alimentación de oreochromis spp
- Author
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Crispulo Perea Roman, Yeny Judith Garcés Caicedo, Luz Stella Muñoz Arboleda, José Luis Hoyos Concha, and José Ader Gómez Peñaranda
- Subjects
Índice de conversión económico ,Índice de rentabilidad económica ,Beneficio neto ,Vísceras de trucha ,Tilapia roja ,Agriculture (General) ,S1-972 ,Biotechnology ,TP248.13-248.65 - Abstract
La alimentación en los sistemas piscícolas representa entre el 50 al 70% de los costos de producción, en donde la harina de pescado es la fuente común de proteína animal utilizada; por consiguiente, se deben buscar alternativas proteicas de menor costo para mejorar la utilidad de las unidades productivas. El objetivo fue valorar económicamente la utilización de ensilaje químico de vísceras de trucha (EQVT) en la alimentación de Tilapia roja (Oreochromis spp); para lo cual, se prepararon cuatro dietas balanceadas con inclusión de EQVT: T1 (control), T2 (10% de inclusión), T3 (20% de inclusión) y T4 (30% de inclusión); las cuales fueron suministradas a 128 juveniles de Tilapia roja con un peso promedio de 142,14 ± 4,74 g; y se evaluaron los índices de conversión y de rentabilidad económica, al igual que análisis de presupuestos parciales. Se presentaron diferencias significativas (P
- Published
- 2018
- Full Text
- View/download PDF
34. Influencia del masaje ZNAR y la inmersión en agua fría en el proceso inflamatorio, Creatin Kinasa y percepción al dolor muscular en jugadores de voleibol (Influence of ZNAR massage and cold water immersion on the inflammatory process, Creatine Kinase and
- Author
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Germán Hernández Cruz, José Raul Hoyos Flores, Gerardo Enrique Muñoz Maldonado, Myriam Zarai García Dávila, Blanca Rocío Rangel Colmenero, and Zeltzin Nereyda Alonso Ramos
- Subjects
Orthopedics and Sports Medicine ,Physical Therapy, Sports Therapy and Rehabilitation ,Education - Abstract
Las estrategias que aminoren el dolor, la inflamación y el daño muscular provocados por la actividad física de alta intensidad en atletas son de interés en la recuperación deportiva, por lo que el objetivo del estudio fue conocer el efecto del masaje ZNAR y la inmersión en agua fría a 10° sobre el proceso inflamatorio a través de la interleucina 6 (IL-6), interleucina 10 (IL-10), el factor de necrosis tumoral Alpha (TNF-α), el daño muscular mediante la Creatin Kinasa (CK) y la percepción al dolor muscular a través de la escala visual análoga de dolor (EVA) en jugadores de voleibol. Participaron 19 atletas divididos en un grupo control y un grupo experimental, sometidos a dos protocolos de recuperación (masaje ZNAR e inmersión en agua fría) posterior a un test de inducción a la fatiga. Se cuantifico la IL-6, IL-10, TNF, CK y EVA. Los resultados mostraron cambios significativos (p < .05) en las tomas de recuperación en el comportamiento del proceso inflamatorio, la CK y la percepción al dolor muscular con ambos métodos de recuperación. Conclusión, el Masaje ZNAR favorece a la recuperación de la IL-6 y la IL-10 además de la disminución de la CK y la percepción al dolor muscular. Abstract: The strategies that reduce pain, inflammation and muscle damage caused by high intensity activity in athletes are of interest in sports recovery, the objective of the study was to know the effect of ZNAR massage and cold water immersion at 10 ° on the inflammatory process through interleukin 6 (IL-6), interleukin 10 (IL-10), tumor necrosis factor Alpha (TNF-α), muscle damage through Creatine Kinase (CK) and the perception of muscle pain through the visual analoge scale (VAS) in volleyball players. 19 athletes were divided into a control group and an experimental group, submitted to two recovery protocols (ZNAR massage and cold water immersion) after a fatigue induction test. IL-6, IL-10, TNF, CK and EVA were quantified. The results showed significant changes (p < .05) in the recovery shots in the behavior of the inflammatory process, the CK and the perception of muscle pain with both recovery methods. Conclusion, the ZNAR Massage favors the recovery of IL-6 and IL-10 in addition to the decrease in CK and the perception of muscle pain
- Published
- 2021
35. A DSL for Context Quality Modeling in Context-Aware Applications.
- Author
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José Ramón Hoyos, Davy Preuveneers, Jesús García Molina, and Yolande Berbers
- Published
- 2011
- Full Text
- View/download PDF
36. Efectos de la inclusión de Bacillus Coagulans en las propiedades fisicoquímicas y sensoriales de snacks expandidos de quinoa
- Author
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Karen Sofia Muñoz Pabon, José Luis Hoyos Concha, and José Fernando Solanilla Duque
- Subjects
Economics and Econometrics ,Materials Chemistry ,Media Technology ,Forestry - Abstract
El consumo de alimentos funcionales ha crecido rápidamente, especialmente aquellos con adición de bacterias probióticas, las cuales generalmente se encuentran en matrices lácteas donde se favorece su crecimiento; por lo tanto, la aplicación de probióticos en otro tipo de matrices presenta desafíos relacionados con el crecimiento, supervivencia, viabilidad, estabilidad y cambios en las características sensoriales durante el procesamiento y almacenamiento. Por ello, el presente estudio tuvo como objetivo desarrollar un nuevo snack probiótico elaborado a partir de quinua y adicionado con bacterias lácticas formadoras de esporas al 0,3%. El probiótico se añadió por pulverización, después del proceso de extrusión, junto con la sal y el aceite, a 70°C en condiciones secas. Una vez incorporados los probióticos, se evaluó la viabilidad bacteriana, la resistencia al jugo gástrico simulado, pruebas fisicoquímicas y sensoriales durante 120 días de almacenamiento a temperatura ambiente y se comparó con un snack de control sin probiótico. La evaluación de la viabilidad se mantuvo por encima de 106 UFC/g de aperitivo. La prueba de resistencia a la simulación del tracto intestinal mostró una viabilidad del 70%. Las propiedades fisicoquímicas y sensoriales evaluadas no tuvieron cambios significativos durante el tiempo de almacenamiento en comparación con el control. Nuestros resultados mostraron que el nuevo snack con probiótico es estable durante su almacenamiento a temperatura ambiente y en condiciones de baja humedad.
- Published
- 2022
37. Plataforma remota para prácticas del área de control
- Author
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Jaiber Cardona and José Gabriel Hoyos Gutiérrez
- Abstract
En los cursos de automatización y control el componente práctico es de suma importancia, ya que permite a los estudiantes probar las metodologías vistas en los espacios académicos y enfrentarse a los inconvenientes al pasar de una simulación a una implementación. Si bien existe un espacio semanal destinado a esta implementación real, usualmente de 2 horas, el número de equipos disponibles y los procesos que deben llevarse a cabo no permiten que dicho tiempo sea suficiente para lograr los resultados de aprendizaje. Se requiere entonces de un trabajo extra clase, por parte de los estudiantes, que les permita lograr las competencias propuestas. En ese sentido, los estudiantes pueden tener dificultades en la realización de las prácticas no terminadas, ya que estarían sujetos a la cantidad de estudiantes que requieran hacer pruebas, y a la disponibilidad de los sistemas, que además deben coincidir con el tiempo separado por los estudiantes para llevar a cabo sus prácticas extra clase. Con miras a permitir mayor flexibilidad en el uso de los sistemas de laboratorio, en este trabajo se expone ControlUQ, una plataforma remota para la experimentación en control. ControlUQ consiste de 3 partes, los sistemas de experimentación, los sistemas embebidos para el control y un servidor para acceso remoto. Los sistemas de experimentación son prototipos reales para los cuales se propone la realización de diferentes estrategias de control, los sistemas embebidos para el control son tarjetas F28379D de Texas Instruments, que pueden ser programadas para implementar las estrategias de control, y el servidor contiene todo el desarrollo web que permite básicamente las siguientes funciones: asignar y controlar los horarios para realizar las pruebas, ver el comportamiento de los sistemas de experimentación a través de cámaras, cargar los programas a los sistemas embebidos, mostrar en un cuadro de texto o en una gráfica los datos arrojados por el sistema embebido y enviar datos a los sistemas embebidos. Aunque hay intercambio de información entre la página web desarrollada y el sistema embebido, las prácticas se enfocan en realizar control embebido, es decir, no se realiza el control de forma remota, así que el intercambio de información entre la página y el sistema embebido se limita a mostrar datos de salida y a cambiar referencias, teniendo en cuenta posibles retrasos en la red. Los usuarios, dependiendo de la práctica que estén desarrollando, tienen 2 formas diferentes de accesos, el acceso básico y el avanzado. En el acceso básico se entregan programas que tienen una estrategia de control PID (proporcional, integral, derivativa) preestablecida y el usuario solo puede cambiar los parámetros. En el acceso avanzado los estudiantes pueden cargar al sistema embebido, programas diseñados por ellos. La plataforma se encuentra en desarrollo y se han realizado pruebas usando como sistemas de experimentación un levitador neumático, un robot 2D y un servoposicionador, y como sistema embebido una tarjeta F28379D. La implementación de la plataforma ControlUQ permite que los estudiantes puedan acceder en horarios diversos, incluyendo noches y fines de semana, permitiendo una mayor flexibilidad para realizar sus prácticas.
- Published
- 2022
38. Emulación de sistemas como una metodología para la enseñanza de estrategias de control
- Author
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Jaiber Cardona and José Gabriel Hoyos Gutiérrez
- Abstract
Cuando se están enseñando estrategias de control, es importante que la teoría sea aplicada tanto a nivel de simulación como en una implementación física. La simulación permite corroborar que la estrategia de control está bien aplicada y la implementación física permite enfrentarse con limitaciones como saturaciones, no linealidades, discretización, etc. La simulación es de acceso más general en el sentido de que, al contar con un computador, se puede realizar en horarios más flexibles, en comparación con la implementación física donde se debe contar con un sistema prototipo al que no se tiene un acceso directo. Entre las limitaciones para acceder al sistema físico está la disponibilidad de horarios de los laboratorios, el número de estudiante esperando usar los sistemas y los horarios propios del estudiante. Como opción para la implementación física se propone emular un sistema de prueba a través de un sistema embebido, de esta manera el control se haría sobre el sistema emulado acercándose al sistema real en una proporción mayor que la sola simulación. Si el prototipo se emula a través de un sistema de bajo costo, como un Arduino, le daría al estudiante la facilidad de contar con la disponibilidad, sin esperar los turnos de laboratorio. Como componente adicional se propone también usar un sistema de bajo costo, que puede ser también un Arduino, que permita remplazar una tarjeta de adquisición de datos o el controlador; en ese sentido el estudiante debería contar con 2 sistemas Arduino, uno para emular el sistema de prueba y otro para realizar el control. El sistema que realiza el control puede ser un sistema con un control embebido o un computador que usa el segundo sistema como tarjeta de adquisición de datos. Esta estrategia se viene usando en la enseñanza del curso Sistemas de Control Automático del programa de ingeniería electrónica, en los cuales se desarrollan 7 laboratorios. En el primer laboratorio se enseña como emular sistemas en una tarjeta Arduino y como usar un Arduino como tarjeta de adquisición de datos. Luego, en cuatro laboratorios se diseñan e implementan estrategias de control las cuales son: PID, compensadores en adelanto y atraso, control RST y control en variables de estado con observador; estos laboratorios son desarrollados sobre un sistema Arduino emulado, pudiendo usar el otro Arduino como tarjeta de adquisición o usando las tarjetas de adquisición disponibles en el laboratorio. En los dos laboratorios restantes se hacen pruebas sobre sistemas prototipo presentes en el laboratorio o elaborados por los estudiantes, donde se aplica cualquiera de las técnicas ensayadas en emulación. Si bien no se utiliza la emulación en todos los laboratorios, ya que se quiere que también tengan la experiencia de controlar un prototipo, dicha emulación permite que los estudiantes tengan una mayor flexibilidad en los laboratorios correspondientes, además de permitir que el profesor asigne diferentes sistemas a controlar a cada estudiante, evitando posibles copias de las soluciones presentadas y un mayor compromiso de parte de los estudiantes.
- Published
- 2022
39. INTEGRATING CULTURAL DIVERSITY IN ORGANIZATIONS: RECRUITMENT AND SELECTION
- Author
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Ana Carolina Zenone, Bruno Barbosa Cezar, and Arnoldo José de Hoyos Guevara
- Subjects
Knowledge management ,business.industry ,Cultural diversity ,Organizational culture ,Sociology ,business ,Organizational performance ,Selection (genetic algorithm) - Abstract
Given the still current scenario of disparity of opportunities regarding groups considered as minorities in several areas, such as education, income and work, cultural diversity in organizations remains relevant and fundamental in order to contribute to improve social conditions. To clarify the theoretical bias and encourage approaches on the topic, that is slowly gaining space, the basic concepts are first considered before going into the central focus of this work regarding potential organizational trends in the management of cultural diversity in Brazil and linked mainly to the processes of attraction and selection of talents. For this purpose, data from a recent survey of 109 Organizations in Brazil, allows to see how the concept management applied in an integral and uniform way in the organizational culture - and permeating all its processes – reflexes positively into business performance in addition to representing the practice of a social responsibility activity that is inherent to the subject. Moreover, results indicate the advantages in recruiting better talents, greater customer orientation, greater employee satisfaction and better decision making. This demonstrates that the gains reach, directly or indirectly, the organizational performance as a whole, and better, guided by principles that permeate an ethics of social responsibility that should be part of the organizational actions.
- Published
- 2021
40. EDITORIAL AND INDEX
- Author
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Arnoldo José de Hoyos Guevara
- Subjects
Index (economics) ,Statistics ,Mathematics - Abstract
This time we start with several papers regarding the new wave of the Digital Era and the ICT Revolution, starting with the general Framework of Global and Remote Communication that represents on the context of an expanding Globalization the way we are opening to a new world with great opportunities, but that also brings some risks like the Moral Challenges of the advanced technologies of the 4th Industrial Revolution, that hopefully may be overcome in the 5th Industrial Revolution with the kind of Society 5.0 that is emerging in Japan. Moreover, advances in the Digital Era may also foster citizenship development as shown in the next paper; but at the same time represent a challenge regarding professional skills needed in particular for startups that are growing rapidly in number and size everywhere; so this is context of the next paper. Next paper is a study on the Quality of Life at work based on Leadership Models that in particular shows the positive impacts of a more Participatory Leadership. Next paper shows, through a survey of 396 companies in Brazil, that only a small number of organizations deal with the process of retaining professionals identified as potential successors that no doubt could be very relevant for the organization. Regarding Human Resources next paper is a study based on a Semantic Analysis about possibilities that are opening already, at the recruitment and selection process, by using Artificial Intelligence. Next paper seeks to find relationships between motivation and engagement and project management by means of a bibliometric analysis. For this purpose, was performed a cluster analysis of 529 articles using VOXviewer indicated that motivation in projects is strongly linked to professional development and growth, with increased interest in sustainability and in the relationship with stakeholders represented by the internal and external community of projects; and regarding Organizational Culture next paper shows, through a survey of 109 Organizations in Brazil, the importance of integrating Cultural Diversity in Organizations that may not only help to improve social conditions but also lead to recruiting better talents and leads to greater customer orientation, greater employee satisfaction and better decision making representing a win-win strategy. Still regarding Organizational Culture, and based on Quinn and Rohrbaugh’s model, next paper focus impacts on Competitive Strategy in the Banking Segment following Quinn and McGrath approach. Next paper is a statistical study regarding Fidelity in the Physical Fitness Business, using Logistic Regression and unidirectional ANOVA, that surprisingly show that frequency of use was the most relevant variable related to customer retention, rather than price and membership length. Today’s economic impacts of COVID-!9 is leading Public Policies in Governments like Brazil to drastically reduce Investments in Science and Technology that may end up decreasing the Human Development Index – HDI, as shown by next paper based on a previous study of the performance indicators in Science, Technology and Innovation CT&I in 14 countries including some like Brazil. Today, 55% of the world's population lives in urban areas, a proportion that is expected to increase to 68% by 2050; as a matter of fact by 2050, two-thirds of all humanity will live in urban areas; and higher changes have actually been in Latin America and the Caribbean with 81.2% of the population already living in urban areas, up from 41.3% in 1950. Hence particularly in these regions sustainable development will become fundamental for the management of cities, so next paper dealing with a small city in southern Brazil may be helping as Best Practice Case. The city was able, through Team Works, to developed a Municipal Goals Plan based on the Sustainable Development Goals - SDG and in less than 4 years (2017-2020) 90% of which were reached through Work Teams driven basically by: The engagement of those responsible for2RISUS – Journal on Innovation and Sustainability, São Paulo, v. 12, n.2, p. 1-3, abr./mai. 2021 - ISSN 2179-3565Administrative Management, The importance of planning, at both strategic and operational levels, and the commitment of the teams in the execution of the actions. Actually, Brazil for some time has being already counting with an Open Sustainable Cities Program that help cities to develop its own strategies accordingly. Next paper is a survey of 48 companies in Brazil that using Crunchbase and Iramuteq technologies found three classes of business blockchain impact on Business models: A distributed value structure, a governance structure and an application structure aimed at encrypted and tokens. Next paper coming from Ukraine shows an approach for modelling a System of Balanced Criteria of Business Process Management (BPM), focused on large data volumes with a basic processes implemented using the cloud computing service — math.semestr, that may be promising in terms of automation of business process management. Last paper comes from Malaysia and deals with a trial on Home Buyers´ Willingness to Pay (WTP), using an on-line survey constructed using the LMA design tool provided in the ‘support.CEs’ package that showed that even a small and diversified sample of 20 respondents dealing with home buyer preferences for sustainable housing and analyzed using the package’s clogit function may give some results even for the measurement of a higher number of variables.
- Published
- 2021
41. PERSONAL VALUES SCALE: BRAZILIAN ENTREPREUNERS’ STARTUPS SAMPLE VALIDATION
- Author
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Arnoldo José de Hoyos Guevara, Flavia Frate, Katia Astorino Carvalhaes, and Renata Martins Corrêa
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Value (ethics) ,Values scale ,media_common.quotation_subject ,Scale (social sciences) ,Openness to experience ,Hedonism ,Psychology ,Creativity ,Conformity ,Social psychology ,media_common ,Pleasure - Abstract
This study aims to validate the personal values that push up entrepreneurs to idealize startups in Brazil. The research respondents are incubated at SEBRAE’s centers, a Brazilian support service for micro and small companies, in Alto do Tietê region, São Paulo, Brazil. The empirical quantitative research used the PQV values scale, the Portrait Questionnaire Value, which evaluates individual values based on Schwartz's model of human values. Continuing the studies of this author, this research is made considering ten types of personal values and four areas that present the following indicators: 1. Conservation (conformity, tradition and security); 2. Openness to change (self-direction, stimulation and hedonism); 3. Self-enhancement (achievement and power); 4. Self-transcendence (benevolence and universalism or philanthropy). The scale contains 40 statements and describes people with different aims, interests and aspirations. A multidimensional scale (MDS), with the aid of R software, analyzed the results in order to position the values dimensions. The hypothesis that the predominant latent values are from the openness to change area was confirmed. Thus, the conclusion is that personal values related to openness to change, such as: self-determination, stimulation and hedonism or pleasure, are latent values in the entrepreneurs interviewed. These values are related to freedom, creativity, audacity and pleasure in their projects.
- Published
- 2021
42. Corrupção nas organizações privadas: análise da percepção moral segundo gênero, idade e grau de instrução
- Author
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Santos, Renato Almeida dos, Guevara, Arnoldo Jose de Hoyos, and Amorim, Maria Cristina Sanches
- Published
- 2013
- Full Text
- View/download PDF
43. A RANKING OF COUNTRIES CONCERNING PROGRESS TOWARDS A SOCIETY 5.0
- Author
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José Luiz Alves da Silva, Jerônimo Henrique Portes, Kallita Ester Magalhães, Daniela Mary Terra, and Arnoldo José de Hoyos Guevara
- Subjects
Ranking ,Work (electrical) ,business.industry ,Political science ,Sustainability ,Sustainable design ,Position (finance) ,Sample (statistics) ,Marketing ,business ,Industrial Revolution ,Agile software development - Abstract
The Fourth Industrial Revolution has arrived, and we are trying to adapt to the innovations. It is changing the way we interact in society, how we consume, live and work. But this agile process already presents a new stage that takes place in conjunction with the new digital age, involving people, technology, sustainability, risks and opportunities: it is the 5.0 Society. This article seeks to understand the impact of ongoing changes and the needs around sustainability, analyzing key indicators that include both movements. With this, we hope to obtain data on the possibility of building the new Sustainable Technology Society, besides investigating the next steps to make this happen in Latin America. In this study, 35 variables were analyzed a sample of 57 countries, including management, business, sustainability, technology, education and Society 5.0 dimensions, among others. We present an analysis of the relationship between the variables and the creation of a synthetic indicator, called S5I (Society 5.0 Index), which allows us to show the position of each country in this ranking. This is the discussion we present here.
- Published
- 2021
44. Adaptive density matrix renormalization group study of the disordered antiferromagnetic spin- 12 Heisenberg chain
- Author
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Alexander H. O. Wada and José A. Hoyos
- Subjects
Condensed Matter - Strongly Correlated Electrons ,Statistical Mechanics (cond-mat.stat-mech) ,Strongly Correlated Electrons (cond-mat.str-el) ,MÉTODO DE MONTE CARLO ,FOS: Physical sciences ,Condensed Matter::Strongly Correlated Electrons ,Disordered Systems and Neural Networks (cond-mat.dis-nn) ,Condensed Matter - Disordered Systems and Neural Networks ,Condensed Matter - Statistical Mechanics - Abstract
Using the recently introduced adaptive density-matrix renormalization-group method, we study the many spin-spin correlations of the spin-$1/2$ antiferromagnetic Heisenberg chain with random coupling constants, namely, the mean value of the bulk and of the end-to-end correlations, the typical value of the bulk correlations, and the distribution of the bulk correlations. Our results are in striking agreement with the predictions of the strong-disorder renormalization group method. We do not find any hint of logarithmic corrections neither in the bulk average correlations, which were recently reported by Shu et al. [Phys. Rev. B 94,174442 (2016)], nor in the end-to-end average correlations. We report computed the existence of logarithmic correction on the end-to-end correlations of the clean chain. Finally, we have determined that the distribution of the bulk correlations, when properly rescaled by an associated Lyapunov exponent, is a narrow and universal (disorder-independent) probability function., (v1) 8 pages, 8 figures; (v2) extended introduction and discussion, 9 pages, 9 figures, published version
- Published
- 2022
45. Reparación Directa y Conflicto Armado Interno: la Constitucionalización de la Responsabilidad Extracontractual del Estado
- Author
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José Fernando Hoyos-García, Mariana Restrepo-M., and Andrés Felipe Roncancio-B.
- Subjects
Conflicto Armado interno ,Multidisciplinary ,seguridad jurídica ,antijuridical damage ,títulos de imputación ,Tort liability ,titles of imputation ,segurança jurídica ,Responsabilidad extracontractual del Estado ,legal certainty ,Responsabilidade extracontratual ,Conflito Armado Interno ,daño antijurídico ,títulos de imputação ,dano antijurídico ,internal armed conflict - Abstract
Resumen Introducción: En materia de responsabilidad extracontractual del Estado, los procesos de reparación directa que se han derivado de hechos con ocasión al Conflicto Armado Interno, en adelante -CAI- han generado cambios en las categorías de protección que se han ido transformando especialmente desde que se reconoce la existencia del CAI. Objetivo: el principal objetivo de esta investigación está articulado a determinar cuáles son las condiciones que se han valorado por parte del Consejo de Estado para establecer la adecuación frente a los títulos de imputación y asimismo, las condiciones de interpretación de las categorías del daño antijurídico y la responsabilidad del Estado. Materiales y Métodos: El estudio fue delimitado a partir de la revisión documental de una elección aleatoria de sentencias del Consejo de Estado tomadas de forma no probabilística a través de las categorías de los títulos de imputación que se presentaron en una reconstrucción cronológica donde el eje referencia se contrastó en una dimensión analítica del reconocimiento del CAI. Resultados: el estudio evidenció cómo entre los diferentes títulos de imputación aplicables a hechos del CAI existen parámetros que evidencian una transición de omisión institucional que permitía un margen de la concepción del daño antijurídico en un sentido amplio, hacia un margen más limitado fundamentado en un desarrollo más riguroso del principio de legalidad. Conclusiones: La declaración del CAI tuvo una gran incidencia en la forma como se desarrolló la responsabilidad extracontractual del Estado, que al disponer de nuevas categorías de protección generó con ello más seguridad jurídica, pero, que a su vez limitó interpretaciones amplias del daño antijurídico. Abstract Introduction: In matters of extracontractual liability of the State, the processes of direct reparation that have been derived from facts on the occasion of the CAI have generated changes in the categories of protection that have been transforming especially since the existence of the CAI is recognized. Objective: The main objective of this research is to determine which are the conditions that have been assessed by the Council of State to establish the adequacy of the title of imputation and the conditions of interpretation of the categories of antijuridical damage and the responsibility of the State. Materials and Methods: The study was delimited from the documentary review of a random selection of sentences of the Council of State taken in a non-probabilistic way through the categories of the titles of imputation that were presented in a chronological reconstruction where the reference axis was contrasted in an analytical dimension of the recognition of the CAI. Results: the study evidenced how among the different titles of imputation applicable to facts of the internal armed conflict there are parameters that evidence a transition from institutional omission that allowed a margin of the conception of the antijuridical damage wide towards a more limited margin based on a more rigorous development of the principle of legality. Conclusions: The declaration of the internal armed conflict had a great impact on the way tort liability was developed, which by providing new categories of protection generated more legal certainty but limited broad interpretations of tort. Resumo Introdução: Em matéria de responsabilidade extracontratual do Estado, os processos de reparação direta que foram derivados de fatos por ocasião da CAI geraram mudanças nas categorias de proteção que têm se transformado especialmente desde que a existência da CAI foi reconhecida. Objetivo: O principal objetivo desta pesquisa é determinar as condições que foram avaliadas pelo Conselho de Estado para estabelecer a adequação do título de imputação e as condições de interpretação das categorias de danos antijurídicos e a responsabilidade do Estado. Materiais e Métodos: O estudo foi delimitado a partir da revisão documental de uma seleção aleatória de julgamentos do Conselho de Estado tomados de forma não-probabilística através das categorias dos títulos de imputação que foram apresentados em uma reconstrução cronológica onde o eixo de referência foi contrastado em uma dimensão analítica do reconhecimento do CAI. Resultados: o estudo evidenciou como entre os diferentes títulos de imputação aplicáveis aos fatos do conflito armado interno existem parâmetros que evidenciam uma transição da omissão institucional que permitiu uma margem ampla da concepção de dano anti-jurídico para uma margem mais limitada baseada em um desenvolvimento mais rigoroso do princípio da legalidade. Conclusões: A declaração do conflito armado interno teve um grande impacto na forma como a responsabilidade extracontratual foi desenvolvida, o que ao proporcionar novas categorias de proteção gerou maior segurança jurídica, mas limitou interpretações amplas dos danos não judiciais.
- Published
- 2022
46. Fostering Open Collaborative Innovation for Micro and Small Technology-Based Firms in Brazil
- Author
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Renata Martins Corrêa, Bill O’ Gorman, Arnoldo José de Hoyos Guevara, and Paulo Melo
- Subjects
050402 sociology ,0504 sociology ,0502 economics and business ,05 social sciences ,Business ,050203 business & management - Abstract
Innovation happens as a combination or a result of various phenomena (i.e. entrepreneurship, business environment, interactions, etc.); it is almost impossible for a single discipline to explain it. Given that there are many facets to explore to cover all aspects of innovation, the present paper approaches this theme from the sociological perspective. Innovation is not a solitary, but an interactive phenomenon, which requires firms to cooperate to reach innovation sources, new processes and technologies. As a theoretical reference, this paper develops the argument of the importance of the firms’ interaction linkages and connections and their influence on the efficiency of the innovation system. So, in this context, the authors decided to adopt the survey method to examine whether or not interaction linkages have an impact on micro and small technology-based firms’ innovativeness in Brazil. The findings showed that interactions between firms and other innovation agents such as universities, research centres, financial institutions and other partners is essential for the development of open, collaborative innovation activities and have a direct impact on the level of innovativeness. Finally, this paper concludes that innovation is a result of the combination of various interaction linkages and not an isolated phenomenon restricted to the firm. As such, it may be appropriately fostered.
- Published
- 2020
47. Selection of sowing date and biofertilization as alternatives to improve the yield and profitability of the F68 rice variety
- Author
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Eduardo Barragán-Quijano, José Isidro Beltrán-Medina, José Álvaro Hoyos-Cartagena, John Edinson Calderón-Carvajal, and Yeison Mauricio Quevedo-Amaya
- Subjects
0106 biological sciences ,0301 basic medicine ,Physics ,night temperature ,respiración ,fijación biológica del nitrógeno ,biological nitrogen fixation ,01 natural sciences ,plant growth promoters ,temperatura nocturna ,03 medical and health sciences ,030104 developmental biology ,promotores del crecimiento vegetal ,radiación fotosintéticamente activa ,photosynthetically active radiation ,Agronomy and Crop Science ,Humanities ,respiration ,Azotobacter chroococcum ,010606 plant biology & botany - Abstract
Multiple factors influence rice yield. Developing management practices that increase crop yield and an efficient use of resources are challenging to modern agriculture. Consequently, the aim of this study was to evaluate biological nitrogen fixation and bacterial phosphorous solubilization (biofertilization) practices with the selection of the sowing date. Three sowing dates (May, July and August) were evaluated when interacting with two mineral nutrition treatments using a randomized complete block design in a split-plot arrangement. Leaf carbon balance, leaf area index, interception and radiation use efficiency, harvest index, dry matter accumulation, nutritional status, and yield were quantified. Results showed that the maximum yield was obtained in the sowing date of August. Additionally, yield increased by 18.92% with the biofertilization treatment, reaching 35.18% of profitability compared to the local production practice. High yields were related to a higher carbon balance during flowering, which was 11.56% and 54.04% higher in August than in July and May, respectively, due to a lower night temperature. In addition, a high efficient use of radiation, which in August was 17.56% and 41.23% higher than in July and May, respectively, contributed to obtain higher yields and this behavior is related to the selection of the sowing date. Likewise, a rapid development of the leaf area index and an optimum foliar nitrogen concentration (>3%) were observed. This allowed for greater efficient use of radiation and is attributed to the activity of nitrogen-fixing and phosphate solubilizing bacteria that also act as plant growth promoters. RESUMEN El rendimiento del arroz está influenciado por múltiples factores. Desarrollar prácticas de manejo que aumenten el rendimiento y sean más eficientes en el uso de los recursos es un reto de la agricultura. En consecuencia, el objetivo de este estudio fue evaluar las prácticas fijación biológica de nitrógeno y solubilización de fosforo por bacterias (biofertilización) con la selección de fecha de siembra. Se evaluaron tres fechas de siembra (mayo, julio y agosto) en interacción con dos tratamientos de nutrición mineral empleando un diseño en bloques completos al azar en arreglo de franjas divididas. Se cuantificó el balance de carbono, índice de área foliar, intercepción y uso eficiente de radiación, índice de cosecha, acumulación de masa seca, estado nutricional y rendimiento. Los resultados mostraron que el máximo rendimiento se obtuvo en la fecha de siembra de agosto; adicionalmente, con la biofertilización el rendimiento se incrementó en 18.92%, alcanzando una rentabilidad del 35.18% en comparación con la práctica local de producción. El alto rendimiento se relacionó con un mayor balance de carbono durante la floración, que fue un 11.56 y 54.04% mayor en agosto, comparado con julio y mayo respectivamente, debido a una menor temperatura nocturna. Asimismo, un alto uso eficiente de la radiación que en agosto fue un 17.56 and 41.23% mayor que julio y mayo respectivamente, contribuyó a mayores rendimientos y este comportamiento se relacionó con la selección de la fecha de siembra. Además, se observó un rápido desarrollo del índice de área foliar y de la concentración optima del nitrógeno foliar (>3%). Esto permitió alcanzar un mayor uso eficiente de la radiación y se atribuye a la actividad de las bacterias fijadoras de nitrógeno y solubilizadoras de fosforo que también son promotoras del crecimiento.
- Published
- 2020
48. Disorder-induced dynamical Griffiths singularities after certain quantum quenches
- Author
-
José A. Hoyos, R. F. P. Costa, and J. C. Xavier
- Subjects
Condensed Matter - Strongly Correlated Electrons ,Statistical Mechanics (cond-mat.stat-mech) ,Strongly Correlated Electrons (cond-mat.str-el) ,FOS: Physical sciences ,Disordered Systems and Neural Networks (cond-mat.dis-nn) ,Condensed Matter - Disordered Systems and Neural Networks ,SISTEMAS DESORDENADOS ,Condensed Matter - Statistical Mechanics - Abstract
We demonstrate that in a class of disordered quantum systems the dynamical partition function is not an analytical function in a time window after certain quantum quenches. We related this behavior to rare and large regions with atypical inhomogeneity configurations. We also quantify the strength of the associated singularities and their signatures in experiments and numerical studies., (v1): 6+6 pages, 4+2 figures, numerics on the dimerized XX spin-1/2 chain; (v2): 5+10 pages, 3+4 figures, numerics on the transverse-field Ising chain, published version
- Published
- 2022
49. Computational Analysis of the Particles Matter in the Respiratory Tract of Children
- Author
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Gustavo Suárez, Juliana A. Niño, José D. Hoyos, Camilo A. Paramo, Wuitman Garrafa, and Egidio Clavijo Gañan
- Published
- 2022
50. Compliance and leadership: the susceptibility of leaders to the risk of corruption in organizations
- Author
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Renato Almeida dos Santos, Arnoldo José de Hoyos Guevara, Ben-Hur Ferraz-Neto, and Maria Cristina Sanches Amorim
- Subjects
Guideline adherence ,Leadership ,Ethics ,institutional ,Medicine - Abstract
In the field of organizational management, the term “compliance”designates the set of actions to mitigate risk and prevent corruption.Programs are composed by formal control systems, codes of ethics,educational actions, ombudsmen, and reporting channels – to mentionthe most recurrent, which vary according to the sector, the institutional culture, and the strategy. Leadership has a fundamental role in the process of compliance, not only due to its power to implement it, but precisely because it exercises this power, in itself, the object of reflections on ethics. The goal of this research was to evaluate the susceptibility of leaders to the risk of breaching organizational rules that involve ethical aspects. For quantitative investigation, we used social and descriptive statistical analysis of secondary data provided by ICTS Global, a company specialized in risk reduction. The study analyzed deals with non-probabilistic sampling by convenience, carried out between the years 2004 and 2008 with employees and candidates of 74 private companies located in Brazil. The final number of individuals studied is 7,267. The indicators analyzed are contained in the index of moral perception of comprehension of individual vision of the concerning hypotheses of ethical conflicts. According to the information obtained in the investigation, leaders are more willing to fail to comply. Paradoxically, the data also show that leaders are more loyal to organizations, raising the hypothesis that the bent towardmoral integrity and loyalty to the organization are not necessarilysimultaneous behaviors (it is possible that, motivated by loyalty, aleader might break away from individual principles). Based on thedata and on bibliographic references, our final considerations pointto the importance of considering systems from which leadership isrecruited, compensated, promoted, developed, etc., in the preventionof corruption. Our data do not show that leaders are more corrupt,but that they have a greater disposition towards relaxing principles in professional circumstances.
- Published
- 2012
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