Browsing by Subject "Time series"

Now showing 1 - 4 of 4
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    Integral Analysis of Circadian Rhythms
    (Yolanda Larriba, 2023-08-10) Vicente-Martinez, J; Almaida Pagán, Pedro Francisco; Martinez-Nicolas, A; Madrid, Juan A; Rol, M A; Bonmati-Carrión, María A; Fisiología; Centro de Investigación Biomédica en Red Fragilidad y Envejecimiento Saludable, Instituto de Salud Carlos III, Madrid, Spain
    Our biological processes do not present a static and steady picture. Instead, most of these processes oscillate throughout the 24-h day. The system that controls this circadian rhythmicity is composed of a central pacemaker and peripheral oscillators that rely on inputs and produce outputs that can be measured through appropriate techniques. The correct measurement and analysis of the func-tioning of each part of the circadian system are becoming essential in many fields of biomedicine. In this chapter, we will cover the entire process, from the acquisition of circadian data to their analyses through parametric and non-parametric methods, including the dynamic modeling of different circadian processes.
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    Monitoring of the Implementation of a Breastfeeding Guideline for 6 Years: A Mixed-Methods Study Using an Interrupted Time Series Approach
    (2021-05) Ruzafa Martinez, Maria; Harillo Acevedo, Francisco David; Ramos Morcillo, Antonio Jesús; Enfermería
    Background: Current literature provides poor information about the implementation of health-promoting clinical practice guidelines (CPGs) and their longitudinal monitoring. Purpose: The aim of this study was to evaluate the longitudinal impact of a CPG implementation program that promotes breastfeeding, its associated quantitative and qualitative indicators, and direct costs. Design: A mixed-methods design with a longitudinal approach was utilized, with an interrupted time series design and the analysis of reports from the implementation program as the qualitative approach. Methods: The study setting was maternity and pediatric units of a health area in the Spanish health system. The implementation of a CPG for the promotion of breastfeeding was evaluated, which included a pre-implementation year (2011), 3 years of implementation (2012-2014), and 2 years of post-implementation (2015-2016). The sample was composed of mother-infant dyads. A segmented logistic regression analysis was utilized to evaluate the changes in the most important breastfeeding indicators. A deductive thematic content analysis was performed starting with quality indicators and a descriptive economic analysis. Findings: In the 6 years of monitoring, 7,842 mother-infant dyads were recorded. The results of the quantitative indicators showed the presence of four stages: baseline, gain, adjustment, and sustainability or saturation. The breast milk at the first feeding had an increasing slope in the gain stage (24% per quarter; odds ratio [OR] = 1.24, 95% confidence interval [CI] 1.12-1.37). The exclusive breastfeeding at hospital discharge showed significant changes in the period of gain (OR = 2.45, 95% CI 1.95-3.08), which was maintained in the adjustment period, with an increase of 18% in the slope of the gain stage (OR = 1.18, 95% CI 1.06-1.32). The longitudinal distribution of the qualitative indicators showed a greater concentration of indicators towards the first half of each phase. The total cost was 209,575€ ($248,670.17). Conclusions: The implementation of the breastfeeding CPG showed early, positive, and sustained results in the exclusive breastfeeding rates. The implementation implied the application of a complex intervention, with its qualitative indicators showing a wave-shaped dynamic. Clinical relevance: Our findings contribute to the understanding and evolution of the main indicators of the implementation of a breastfeeding CPG, providing details on the magnitude of the effect, the process of change, and the associated costs.
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    Revisión y prospectiva de la producción española en tesis doctorales de pedagogía (1976-2006)
    (Universidad de Murcia. Servicio de Publicaciones, 2008-01-01) Fernández Cano, Antonio; Torralbo Rodríguez, Manuel; Vallejo Ruiz, Mónica
    This paper reviews and analyses the last thirty years in terms of the annual production of PhD theses in the field of Pedagogy, wich are included in the Spanish database TESEO. Using deterministic models and ARIMA methodology, this study aims to define patterns of growth, verify data fit to scientometric standards and undertake prospective analysis in order to determine the trends that steer research into Pedagogy. Furthermore, qualitative considerations are provided, based on the status and production of PhD theses in Spain, wich might help to understand and improve this area of university education, at light of its integration onto the European Space for Higher Education.
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    The dynamics of the university impact on YouTube: a comparative analysis
    (2021) Ros Gálvez, Alejandro; Meseguer Martínez, Ángel; López Buenache, Germán; Métodos Cuantitativos para la Economía y la Empresa
    The impact of universities on social networks has been widely studied, especially on Facebook and Twitter. However, there is a clear lack of research on YouTube, despite an overwhelming presence of universities on this online video platform. The objective of this work is to analyse similarities in the dynamics of views and likes between the YouTube channel of a university, Polytechnic University of Valencia (UPV), and an educational channel, the saurabhschool [25]. This is the first work that analyzes the dynamics of online video impact of a university on YouTube, which are subsequently compared to those of an educational channel to find common patterns. The times series of views and likes are obtained for both channels, their seasonal components are calculated and compared. Observation is subsequently supported by an analysis of correlations and the Euclidean distance. Results suggest that the video impact dynamics of a university channel behave similarly to those of an educational channel. These results can help universities anticipate the behavior pattern of their videos in order to maximize the impact of their content through YouTube.