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Item type: Ítem , Access status: Acceso Abierto , Análisis de la normativa ecuatoriana sobre SGDA, y sus elementos para aplicación en clientes regulados(Universidad Católica de Cuenca., 2026) Lojano Lojano, Franklin Paul; Jacome Aucay, Diego Xavier.This study evaluated the technical and economic feasibility and regulatory framework of Distributed Generation Systems for Self-Supply (SGDA, by its Spanish acronym) using photovoltaic systems in Ecuador, other Latin American countries, and Europe. The study used a quantitative, descriptive, and applied approach, based on a literature review, international comparison, equipment analysis, sizing calculations, and the development of a pilot project for regulated consumers. The results showed that Regulation ARCONEL-005/24 establishes conditions for authorization, connection, metering, billing, and surplus compensation, although gaps remain in administrative simplification, incentives, public registries, and collective self-supply. The economic evaluation identified approximate payback periods of four to eight years, depending on consumption and system scale. The pilot system, consisting of sixteen 610-W modules with a total installed capacity of 9.76 kWp, would produce 39.06 kWh per day compared to an adjusted demand of 37.18 kWh. It was determined that SGDA systems are viable, provided their sizing and regulatory conditions are tailored to the conditions of each specific project evaluated.Item type: Publicación , Access status: Acceso Abierto , Proyecto de Titulación embargado con fines de publicación de impacto.(Universidad Católica de Cuenca, 2028-09-08) Calderón Ruilova, Kamila RafaelaItem type: Ítem , Access status: Acceso Abierto , Efectividad del abordaje directo anterior versus el abordaje posterior en la artroplastia total de cadera: revisión sistemática(Universidad Católica de Cuenca., 2026) Spósito Mirandas, Elton CleberBackground: Total hip arthroplasty (ATC) is an intervention used to treat degenerative conditions and fractures. The surgical approach influences the functional results. The direct anterior approach (DAA) has gained prominence compared with the posterior approach (PA) for its possible benefits in early recovery, although controversies persist regarding its overall effectiveness. Objective: To compare the effectiveness of DAA versus PA in THA, considering functional recovery, postoperative complications and medium-term results. Methods: A systematic review of studies published between 2014 and 2024 in PubMed, Scopus and SciELO was conducted. Studies with at least 40 patients per group and results on function, complications, or surgical revision were included. Studies without a comparison group, duplicates and gray literature were excluded. The methodological quality was evaluated using NIH and RoB1 tools. Results: The ADA showed lower pain levels, better early HHS and WOMAC scores, and a lower rate of dislocations. However, it presented a higher risk of intraoperative complications, such as fractures and nerve injuries, especially during the learning curve. The PA showed similar long-term functional results, although with a higher incidence of dislocations. Discussion: The ADA offers advantages in early recovery, but requires more technical training and specific resources. The PA has a more stable learning curve. The choice should be individualized according to the patient, the surgeon's experience and the available resources. Conclusions: The ADA provides early functional advantages, although it requires greater surgical skill. The choice of approach must balance efficacy, safety and clinical context. Keywords: direct anterior approach, posterior approach, total hip arthroplasty, surgical complicationsItem type: Ítem , Access status: Acceso Abierto , Trastornos del sueño como factor de riesgo en la enfermedad de Alzheimer en adultos mayores.(Universidad Católica de Cuenca., 2026) Armijos Armijos, Nahiely Estefania; Sarmiento Maldonado, Camila GeovannaIntroduction. This review analyzed the relationship between sleep disorders and Alzheimer’s disease in older adults, considering sleep as a clinical dimension associated with cognitive decline and neurodegenerative processes. Objective. The influence of sleep disorders as risk factors for the development of Alzheimer’s disease in older adults was analyzed. Methodology. A qualitative, descriptive literature review was conducted based on scientific articles published between 2018 and 2025 and retrieved from academic databases and platforms including PubMed, Scopus, Web of Science, ScienceDirect, SpringerLink, Frontiers, MDPI, Nature, and SciELO. After applying the inclusion and exclusion criteria, 30 studies were selected for the final analysis. Results. The evidence showed that insomnia, obstructive sleep apnea, circadian rhythm disturbances, sleep fragmentation, and changes in sleep architecture were associated with greater cognitive vulnerability. Mechanisms such as intermittent hypoxia, neuroinflammation, oxidative stress, glymphatic dysfunction, and the accumulation of amyloid-beta and tau protein were also identified. Conclusion. Sleep disorders constituted clinically relevant and potentially modifiable factors in understanding the risk of Alzheimer’s disease, although methodological heterogeneity prevented a definitive causal relationship from being established.Item type: Ítem , Access status: Embargo , Proyecto de Titulación embargado con fines de publicación de impacto(Universidad Católica de Cuenca, 2026) Vidal Moran, Claudia Alejandra
