Isótopos estables en la dinámica del ciclo hidrológico del Pacífico Central de Nicaragua
Tesis Materias > Ingeniería Universidad Internacional Iberoamericana Puerto Rico > Docencia > Trabajos finales de Máster Cerrado Español La zona central del Pacífico de Nicaragua tiene su origen tectónico debido a la actividad entre las placas tectónicas de Coco y Caribe, conforman un complejo de estructuras volcánicas que se han llenado de sedimentos, dando lugar a acuíferos productivos y a estructuras de lagunas cratéricas, destacando los lagos Cocibolca y Xolotlán. Esta disponibilidad hídrica está estrechamente relacionada con que el 35.7% de la población y la industria de Nicaragua se encuentren en esta región. Esta investigación utiliza isótopos estables de Oxígeno 18 y Deuterio en las precipitaciones, aguas subterráneas y aguas superficiales de lagos y lagunas, para ajustar el modelo hidrológico conceptual de esta región. Las precipitaciones mostraron fluctuaciones propias del clima de Nicaragua, donde el empobrecimiento se acentúa en los meses de mayor precipitación (mayo, septiembre y octubre) empobrecimiento de δ18O superior a -7 ‰, hay evidencia de enriquecimiento producto del fenómeno climático conocido como canícula en los meses de julio-agosto. Aguas subterráneas presentan alta variabilidad en los contenidos isotópicos, un grupo relacionado que se recarga de precipitaciones a elevaciones entre 700-900 m.s.n.m. en dirección meseta de los pueblos-El Crucero-Ciudad Sandino, los valores δ18O oscilan entre -7 y -8 ‰. Otro grupo presenta contenido isotópico notablemente más enriquecido (-5.8 a -5.0 ‰ de δ18O) desde Calderas del Volcán Masaya hacia Tipitapa, con posible influencia de termalismo tectónico. Las aguas superficiales tendencia de enriquecimiento isotópico con valores δ18O entre +5 hasta -10 ‰, funcionando como influentes-efluentes de acuerdo con el gradiente hidráulico y las líneas de flujo subterráneas. Por su parte, los lagos Cocibolca y Xolotlán sugieren un funcionamiento ganador, siendo alimentados por fuentes de agua superficial y subterránea. metadata Barberena Moncada, Javier Antonio mail barmon88@yahoo.com (2022) Isótopos estables en la dinámica del ciclo hidrológico del Pacífico Central de Nicaragua. Masters thesis, SIN ESPECIFICAR.
Texto completo no disponible.Resumen
La zona central del Pacífico de Nicaragua tiene su origen tectónico debido a la actividad entre las placas tectónicas de Coco y Caribe, conforman un complejo de estructuras volcánicas que se han llenado de sedimentos, dando lugar a acuíferos productivos y a estructuras de lagunas cratéricas, destacando los lagos Cocibolca y Xolotlán. Esta disponibilidad hídrica está estrechamente relacionada con que el 35.7% de la población y la industria de Nicaragua se encuentren en esta región. Esta investigación utiliza isótopos estables de Oxígeno 18 y Deuterio en las precipitaciones, aguas subterráneas y aguas superficiales de lagos y lagunas, para ajustar el modelo hidrológico conceptual de esta región. Las precipitaciones mostraron fluctuaciones propias del clima de Nicaragua, donde el empobrecimiento se acentúa en los meses de mayor precipitación (mayo, septiembre y octubre) empobrecimiento de δ18O superior a -7 ‰, hay evidencia de enriquecimiento producto del fenómeno climático conocido como canícula en los meses de julio-agosto. Aguas subterráneas presentan alta variabilidad en los contenidos isotópicos, un grupo relacionado que se recarga de precipitaciones a elevaciones entre 700-900 m.s.n.m. en dirección meseta de los pueblos-El Crucero-Ciudad Sandino, los valores δ18O oscilan entre -7 y -8 ‰. Otro grupo presenta contenido isotópico notablemente más enriquecido (-5.8 a -5.0 ‰ de δ18O) desde Calderas del Volcán Masaya hacia Tipitapa, con posible influencia de termalismo tectónico. Las aguas superficiales tendencia de enriquecimiento isotópico con valores δ18O entre +5 hasta -10 ‰, funcionando como influentes-efluentes de acuerdo con el gradiente hidráulico y las líneas de flujo subterráneas. Por su parte, los lagos Cocibolca y Xolotlán sugieren un funcionamiento ganador, siendo alimentados por fuentes de agua superficial y subterránea.
Tipo de Documento: | Tesis (Masters) |
---|---|
Palabras Clave: | hidrología isotópica, acuíferos, lagunas cratéricas, volcanes, línea meteórica |
Clasificación temática: | Materias > Ingeniería |
Divisiones: | Universidad Internacional Iberoamericana Puerto Rico > Docencia > Trabajos finales de Máster |
Depositado: | 10 Nov 2023 23:30 |
Ultima Modificación: | 10 Nov 2023 23:30 |
URI: | https://repositorio.unib.org/id/eprint/1895 |
Acciones (logins necesarios)
Ver Objeto |
<a href="/10290/1/Influence%20of%20E-learning%20training%20on%20the%20acquisition%20of%20competences%20in%20basketball%20coaches%20in%20Cantabria.pdf" class="ep_document_link"><img class="ep_doc_icon" alt="[img]" src="/style/images/fileicons/text.png" border="0"/></a>
en
open
The main aim of this study was to analyse the influence of e-learning training on the acquisition of competences in basketball coaches in Cantabria. The current landscape of basketball coach training shows an increasing demand for innovative training models and emerging pedagogies, including e-learning-based methodologies. The study sample consisted of fifty students from these courses, all above 16 years of age (36 males, 14 females). Among them, 16% resided outside the autonomous community of Cantabria, 10% resided more than 50 km from the city of Santander, 36% between 10 and 50 km, 14% less than 10 km, and 24% resided within Santander city. Data were collected through a Google Forms survey distributed by the Cantabrian Basketball Federation to training course students. Participation was voluntary and anonymous. The survey, consisting of 56 questions, was validated by two sports and health doctors and two senior basketball coaches. The collected data were processed and analysed using Microsoft® Excel version 16.74, and the results were expressed in percentages. The analysis revealed that 24.60% of the students trained through the e-learning methodology considered themselves fully qualified as basketball coaches, contrasting with 10.98% of those trained via traditional face-to-face methodology. The results of the study provide insights into important characteristics that can be adjusted and improved within the investigated educational process. Moreover, the study concludes that e-learning training effectively qualifies basketball coaches in Cantabria.
Josep Alemany Iturriaga mail josep.alemany@uneatlantico.es, Álvaro Velarde-Sotres mail alvaro.velarde@uneatlantico.es, Javier Jorge mail , Kamil Giglio mail ,
Alemany Iturriaga
<a class="ep_document_link" href="/15198/1/nutrients-16-03859.pdf"><img class="ep_doc_icon" alt="[img]" src="/style/images/fileicons/text.png" border="0"/></a>
en
open
Carotenoids Intake and Cardiovascular Prevention: A Systematic Review
Background: Cardiovascular diseases (CVDs) encompass a variety of conditions that affect the heart and blood vessels. Carotenoids, a group of fat-soluble organic pigments synthesized by plants, fungi, algae, and some bacteria, may have a beneficial effect in reducing cardiovascular disease (CVD) risk. This study aims to examine and synthesize current research on the relationship between carotenoids and CVDs. Methods: A systematic review was conducted using MEDLINE and the Cochrane Library to identify relevant studies on the efficacy of carotenoid supplementation for CVD prevention. Interventional analytical studies (randomized and non-randomized clinical trials) published in English from January 2011 to February 2024 were included. Results: A total of 38 studies were included in the qualitative analysis. Of these, 17 epidemiological studies assessed the relationship between carotenoids and CVDs, 9 examined the effect of carotenoid supplementation, and 12 evaluated dietary interventions. Conclusions: Elevated serum carotenoid levels are associated with reduced CVD risk factors and inflammatory markers. Increasing the consumption of carotenoid-rich foods appears to be more effective than supplementation, though the specific effects of individual carotenoids on CVD risk remain uncertain.
Sandra Sumalla Cano mail sandra.sumalla@uneatlantico.es, Imanol Eguren García mail imanol.eguren@uneatlantico.es, Álvaro Lasarte García mail , Thomas Prola mail thomas.prola@uneatlantico.es, Raquel Martínez Díaz mail raquel.martinez@uneatlantico.es, Iñaki Elío Pascual mail inaki.elio@uneatlantico.es,
Sumalla Cano
<a href="/14584/1/s41598-024-73664-6.pdf" class="ep_document_link"><img class="ep_doc_icon" alt="[img]" src="/style/images/fileicons/text.png" border="0"/></a>
en
open
The evolution of the COVID-19 pandemic has been associated with variations in clinical presentation and severity. Similarly, prediction scores may suffer changes in their diagnostic accuracy. The aim of this study was to test the 30-day mortality predictive validity of the 4C and SEIMC scores during the sixth wave of the pandemic and to compare them with those of validation studies. This was a longitudinal retrospective observational study. COVID-19 patients who were admitted to the Emergency Department of a Spanish hospital from December 15, 2021, to January 31, 2022, were selected. A side-by-side comparison with the pivotal validation studies was subsequently performed. The main measures were 30-day mortality and the 4C and SEIMC scores. A total of 27,614 patients were considered in the study, including 22,361 from the 4C, 4,627 from the SEIMC and 626 from our hospital. The 30-day mortality rate was significantly lower than that reported in the validation studies. The AUCs were 0.931 (95% CI: 0.90–0.95) for 4C and 0.903 (95% CI: 086–0.93) for SEIMC, which were significantly greater than those obtained in the first wave. Despite the changes that have occurred during the coronavirus disease 2019 (COVID-19) pandemic, with a reduction in lethality, scorecard systems are currently still useful tools for detecting patients with poor disease risk, with better prognostic capacity.
Pedro Ángel de Santos Castro mail , Carlos del Pozo Vegas mail , Leyre Teresa Pinilla Arribas mail , Daniel Zalama Sánchez mail , Ancor Sanz-García mail , Tony Giancarlo Vásquez del Águila mail , Pablo González Izquierdo mail , Sara de Santos Sánchez mail , Cristina Mazas Pérez-Oleaga mail cristina.mazas@uneatlantico.es, Irma Dominguez Azpíroz mail irma.dominguez@unini.edu.mx, Iñaki Elío Pascual mail inaki.elio@uneatlantico.es, Francisco Martín-Rodríguez mail ,
de Santos Castro
<a class="ep_document_link" href="/14915/1/s41598-024-74357-w.pdf"><img class="ep_doc_icon" alt="[img]" src="/style/images/fileicons/text.png" border="0"/></a>
en
open
Diabetes is a persistent health condition led by insufficient use or inappropriate use of insulin in the body. If left undetected, it can lead to further complications involving organ damage such as heart, lungs, and eyes. Timely detection of diabetes helps obtain the right medication, diet, and exercise plan to lead a healthy life. ML approach has been utilized to obtain rapid and reliable diabetes detection, however, existing approaches suffer from the use of limited datasets, lack of generalizability, and lower accuracy. This study proposes a novel feature extraction approach to overcome these limitations by using an ensemble of convolutional neural network (CNN) and long short-term memory (LSTM) models. Multiple datasets are combined to make a larger dataset for experiments and multiple features are utilized for investigating the efficacy of the proposed approach. Features from the extra tree classifier, CNN, and LSTM are also considered for comparison. Experimental results reveal the superb performance of CNN-LSTM-based features with random forest model obtaining a 0.99 accuracy score. This performance is further validated by comparison with existing approaches and k-fold cross-validation which shows the proposed approach provides robust results.
Furqan Rustam mail , Ahmad Sami Al-Shamayleh mail , Rahman Shafique mail , Silvia Aparicio Obregón mail silvia.aparicio@uneatlantico.es, Rubén Calderón Iglesias mail ruben.calderon@uneatlantico.es, J. Pablo Miramontes Gonzalez mail , Imran Ashraf mail ,
Rustam
<a href="/14950/1/fmicb-15-1481418.pdf" class="ep_document_link"><img class="ep_doc_icon" alt="[img]" src="/style/images/fileicons/text.png" border="0"/></a>
en
open
Background: The 2023 dengue outbreak has proven that dengue is not only an endemic disease but also an emerging health threat in Bangladesh. Integrated studies on the epidemiology, clinical characteristics, seasonality, and genotype of dengue are limited. This study was conducted to determine recent trends in the molecular epidemiology, clinical features, and seasonality of dengue outbreaks. Methods: We analyzed data from 41 original studies, extracting epidemiological information from all 41 articles, clinical symptoms from 30 articles, and genotypic diversity from 11 articles. The study adhered to the standards of the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) Statement and Cochrane Collaboration guidelines. Conclusion: This study provides integrated insights into the molecular epidemiology, clinical features, seasonality, and transmission of dengue in Bangladesh and highlights research gaps for future studies.
Nadim Sharif mail , Rubayet Rayhan Opu mail , Tama Saha mail , Abdullah Ibna Masud mail , Jannatin Naim mail , Khalaf F. Alsharif mail , Khalid J. Alzahrani mail , Eduardo René Silva Alvarado mail eduardo.silva@funiber.org, Irene Delgado Noya mail irene.delgado@uneatlantico.es, Isabel De la Torre Díez mail , Shuvra Kanti Dey mail ,
Sharif