Repositorio Institucional
Sistema de Bibliotecas Universidad Finis Terrae
El Repositorio Institucional de la Universidad FinisTerrae, es gestionado por el Sistema de Bibliotecas y tiene por objetivo permitir el acceso libre a la producción académica e institucional de la Universidad, aumentando la visibilidad de sus contenidos y garantizando su conservación.
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Mapping intensive care across Ibero-America: The FEPIMCTI multinational survey of bed capacity, workforce, and pandemic response
(Elsevier, 0022-07-26) Matos, Alfredo; Giglio, Andrés; Pérez-Fernandez, Javier; Nates, Joseph; Cárdenas, Yenny; Raimondi, Nestor; Sánchez, Jorge; Hidalgo, Jorge; Rezende, Ederlon; Borges-Sa, Marcio
Background: Intensive care resources are unequally distributed across Ibero-America, and reliable comparable data are scarce, hindering cross-national comparison and health-system planning. Methods: We conducted a cross-sectional survey of the 25 national critical care societies affiliated with FEPIMCTI. Presidents or designated representatives reported country-level data on ICU beds, intensivist and nursing workforce, organizational models, training pathways, and surge capacity before and during the COVID-19 pandemic. Resource density was summarized as the country-level median with IQR and as the population-weighted regional rate. Results: Twenty-one countries, including Spain and Portugal, participated, representing 693.6 million inhabitants. A total of 78,723 ICU beds were reported (country-level median 6.1 per 100,000, IQR 3.3–12.4; population-weighted rate 11.3), with public ICUs accounting for 51.6%. A total of 23,803 intensivists were identified (median 2.6 per 100,000, IQR 1.0–5.0), with five countries below 1 per 100,000. Nurse-to-patient ratios ranged from 1:1 to 1:7, and universal 24/7 intensivist coverage was reported in only a subset of countries. During the pandemic, ICU bed capacity rose 69%; among the 20 countries with data for both periods, physician involvement rose 32%, largely through redeployment of non-intensivists rather than growth of the certified workforce. Conclusions: Critical care capacity, workforce, and organization vary widely across Ibero-America, with many countries below high-income benchmarks and pandemic surges met largely through temporary redeployment. These findings provide the first coordinated regional benchmark to guide workforce development, standardized training, and organizational strengthening.
Silencio performativo y mediación de gracia: el silencio como acción lingüístico-teológica en la predicación cristiana
(Universidad Católica del Maule, 2026-08-17) Dantas Freitas Estrela, Kênio Angelo
Lejos de ser una mera ausencia, el silencio en la predicación cristiana puede entenderse como una forma de lenguaje: un acto expresivo, performativo y mediador de gracia. El problema que aborda este artículo consiste en determinar en qué sentido el silencio puede operar como acción comunicativa dentro del discurso homilético. Este artículo desarrolla esa tesis desde una perspectiva interdisciplinaria que articula la teología espiritual y el análisis lingüístico formal. A partir del libro La fuerza del silencio, del cardenal Robert Sarah, y de varias homilías de Amigos de Dios, de San Josemaría Escrivá, consideradas aquí como un corpus discursivo, se analiza cómo ciertas elipsis, pausas y fragmentos implícitos intensifican la densidad comunicativa del discurso homilético. Utilizando herramientas como la teoría de los actos de habla, la teoría de la relevancia y la semántica formal, se sostiene que, bajo condiciones pragmáticas específicas, el silencio puede funcionar como un acto performativo con efectos interpretativos y espirituales en el oyente. Este estudio prolonga una línea de investigación previa sobre la unidad de vida y la predicación como acto comunicativo integral, proponiendo ahora una caracterización explícita del silencio como operador interpretativo de carácter teológico-lingüístico.
Dos novelas de ciencia ficción de la década de 1950: El fin de la infancia (Arthur C. Clarke) y Los altísimos (Hugo Correa)
(University of Pittsburgh, 2026-08-04) Cabrera-Pommiez, Marcela; Salas Camus, Pedro Pablo
En este artículo se analizan comparativamente las novelas de ciencia ficción El fin de la infancia, del escritor inglés Arthur C. Clarke (1953), y Los altísimos, del chileno Hugo Correa (1959), que exploran el contacto entre la humanidad y civilizaciones extraterrestres avanzadas desde un contexto sociohistórico compartido. El análisis considera el tránsito desde una situación inicial utópica hacia una realidad abiertamente distópica, marcada por la pérdida de autonomía humana, la subordinación a inteligencias superiores y la existencia de jerarquías cósmicas que exceden la comprensión de los sujetos. A partir de una lectura textual comparada, se sostiene que ambas obras elaboran respuestas simbólicas afines ante ansiedades históricas propias de la Guerra Fría, de la carrera espacial y de la ambivalencia del progreso técnico. No obstante, el artículo también examina sus diferencias: mientras Clarke formula esta crisis en términos principalmente ontológicos y biológicos, Correa la reescribe en clave moral, como una advertencia frente a la soberbia civilizatoria y los peligros éticos del desarrollo tecnológico.
Mapping Sweet Potato Global Research for Sustainable Food Systems: A Bibliometric Perspective.
(MDPI, 2026-03-12) Rincón-Cervera, Miguel Ángel; López-Arana, Sandra; Costa de Camargo, Adriano; Guil-Guerrero, José Luis; de las Heras-Roger, Jesús; Díaz-Romero, Carlos
Sweet potato (Ipomoea batatas L.) has become a relevant crop in global research due to its remarkable resilience to abiotic stress, richness in bioactive compounds, nutritional relevance, and growing importance within sustainability and circular economy frameworks. This study conducted a comprehensive bibliometric analysis of scientific production indexed in Web of Science, Scopus, and PubMed, mapping how research links the crop's biochemical properties with sustainability-oriented innovation. Literature on bioactive compounds, food waste management, circular economy strategies, and by-product valorization was examined through keyword co-occurrence, authorship networks, citation patterns, and thematic clustering. Results reveal a rapidly expanding research landscape over the past decade, with strong connections between phytochemical composition, health benefits, sustainable cultivation, and industrial applications. Biology, Chemistry, and Food Science emerged as the most interconnected areas. Collaboration networks remain fragmented, and high-income countries achieve disproportionate citation impact, underscoring structural inequalities. Theoretically, this study contributes to understanding how sweet potato research consolidates as a multidisciplinary field aligned with global sustainability goals. Practically, it highlights opportunities to strengthen equitable international collaboration, advance circular economy approaches, and integrate biotechnology with environmental sustainability to support more resilient food systems.
Service-Specific Heterogeneity in Sepsis Variable Significance and Machine Learning Model Performance: A Stratified Analysis of the BIAlert Cohort
(MDPI, 2026-06-24) Borges-Sa, Marcio; Macias-Fassio, Eric; Delgado, Alejandro; Santiago Salas Sosa; Aranda, María; Socias, Antonia; del Castillo, Alberto; Giglio, Andrés
Background/Objectives: Sepsis detection relies on clinical variables and scoring systems assumed to perform uniformly across hospital settings. However, sepsis phenotype distributions shift between clinical environments, suggesting that variable importance may be setting dependent. This study aimed to quantify service-specific variability in the discriminatory capacity of clinical variables for sepsis detection and to evaluate whether this heterogeneity translates into differential performance of machine learning models compared to traditional clinical scoring systems. Methods: This stratified sub-analysis of the BIAlert Sepsis cohort (203,755 patients; 11,864 sepsis episodes, 2014–2018) evaluated 61 structured quantitative variables across nine hospital services (≥90 sepsis episodes each). Within each service, the Mann–Whitney–Wilcoxon test (p < 0.01, Holm-corrected) assessed differences between septic and non-septic episodes. Five machine learning models (Random Forest/BIAlert, XGBoost, CatBoost, SVM, Neural Network) and three clinical rules (NEWS, SIRS, qSOFA) were evaluated globally and stratified across four clinical environments. Results: The proportion of significant variables ranged from 95.1% in the Emergency Department (58/61) to 37.7% in the Intensive Care Unit (23/61). Lactate was the only universally significant variable (9/9 services). Clinical scoring systems collapsed in Critical Care (qSOFA and NEWS AUC 0.459). BIAlert maintained the highest AUC across all environments (0.975–0.857). The Friedman test confirmed significant differences (χ2 = 28.00, p < 0.001), with BIAlert achieving a mean rank of 1.0. Conclusions: The discriminatory capacity of clinical variables for sepsis detection is not uniform across hospital services. ML models, particularly BIAlert, maintained robust performance where fixed-rule scoring systems failed.