Examinando por Autor "Díaz, Felipe"

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    Holographic renormalization of Horndeski gravity
    (Springer Science and Business Media Deutschland GmbH, 2024-05) Cáceres, Nicolás; Corral, Cristóbal; Díaz, Felipe; Olea, Rodrigo
    We study the renormalization of a particular sector of Horndeski theory. In particular, we focus on the nonminimal coupling of a scalar field to the Gauss-Bonnet term and its kinetic coupling to the Einstein tensor. Adopting a power expansion on the scalar function that couples the Gauss-Bonnet term, we find specific conditions on their coefficients such that the action and charges are finite. To accomplish the latter, we add a finite set of intrinsic boundary terms. The contribution of the nonminimal coupling generates an effective scalar mass, allowing us to recover a modified Breitenlohner-Freedman bound. Furthermore, we compute the holographic 1-point functions and Ward identities associated with the scalar field and the metric. We constrain the parameter space of the theory by taking into account the preservation of scaling symmetry at the boundary.
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    Treatment outcomes of the e-Health in the elderly: A systematic review
    (Editorial Salud, Ciencia y Tecnologia, 2024-01) Martínez, Elizabeth; Rivera, Fernanda; Reynaldos-Grandón, Katiuska; Díaz, Felipe; León, María Elisa; Febré, Naldy; Arcêncio, Ricardo; Cartagena-Ramos, Denisse
    Introduction: E-Health, is a relevant service provision since the SARS-Cov-2 pandemic, when it became a patient care alternative, however, few studies have evidenced the treatment outcomes of this tool in elderly people. Objectives: to analyze the treatment outcomes of telemedicine in the elderly. Methods: a systematic review was carried out according to six stages. The PubMed, CINAHL and Science Direct databases were used. Experimental studies between 2017 and 2022 were included. All references were exported to the EndNote manager. The methodological quality was analyzed using the Mixed Method Appraisal Tools (MMAT) checklist. The deductive thematic analysis of the data was based on the Model for Assessment of Telemedicine Applications (MAST). Results: out of a total of 2 628 articles identified and 10 included. Of the total number of studies analyzed, two of them used a digital platform, two by telephone follow-up, four mixed telemedicine interventions and two by tele-rehabilitation. According to the evaluation of the methodological quality of the studies, five of them met all the criteria and five studies met more than 80 % of the criteria. Conclusions: mixed e-Health tools improve treatment outcomes in the psychosocial perspective in the older adult. Future studies should delve into other aspects of the impact of treatment outcomes of other digital tools used in health for this age group, such as somatic, physical, and cultural aspects. © 2023; Los autores.