Search results for " Methodology"
showing 10 items of 575 documents
Mortalidad por defectos del tubo neural en México, 1980-1997
2003
Objetivo. Describir la mortalidad en México por defectos del tubo neural, durante el periodo 1980-1997. Material y métodos. Las tasas anuales de mortalidad estatales y nacionales, por defectos del tubo neural, se calcularon por 10 000 nacidos vivos. La tendencia temporal fue evaluada por el porcentaje de cambio anual obtenido mediante un modelo de regresión de Poisson. Se calculó la razón de mortalidad, tomando la media nacional como referencia. Las tasas y las razones se representaron gráficamente en mapas. Resultados. Durante el periodo la tasa bruta de mortalidad por defectos del tubo neural fue de 5.8 por 10 000 nacidos vivos. La anencefalia fue el tipo de defecto más frecuente (37.7%),…
Metodología innovadora en la universidad: sus efectos sobre los procesos de aprendizaje de los estudiantes universitarios
2015
Se pretendía evaluar el impacto de metodología centrada en el aprendizaje sobre las estrategias de aprendizaje y los enfoques de aprendizaje de un grupo de alumnos de Química, de 1º curso de Ingeniería, de la Universitat Politécnica de Valencia. Se utilizó un diseño preexperimental, con medidas de pretest y postest, tomadas mediante el cuestionario CEVEAPEU y el CPE. La muestra estaba constituida por 20 alumnos. Los métodos docentes utilizados integraban metodología expositiva, preguntas, resolución de problemas, elaboración de una monografía, exposiciones orales, prácticas de laboratorio, trabajo en grupo, tutorías en el aula y un sistema de evaluación que hacía uso de procedimientos forma…
Ocena wiarygodności internetowych serwisów wybranych polskich wyższych uczelni niepublicznych
2019
Celem artykułu jest dokonanie i przedstawienie oceny wiarygodności internetowych serwisów wybranych polskich wyższych uczelni niepublicznych. Koncepcja, metody badań: Sięgając do definicji terminów związanych z pojęciem wiarygodność odniesiono je do serwisów internetowych. Na tej podstawie stworzono konceptualne ramy oceny wiarygodności dla takich serwisów. Ramy te posłużyły do oceny wiarygodności internetowych serwisów wybranych wyższych uczelni niepublicznych w Polsce z wykorzystaniem metody sondażowej i oryginalnego narzędzia. Ranking wiarygodności badanych serwisów internetowych utworzono wykorzystując metodę TOPSIS. Wyniki i wnioski: W artykule pokazano, że zestaw cech i kryteriów używ…
Aborted quantitative study in the French music industry: the changes of music labels facing streaming
2020
International audience; This paper shows a failed case study of the impact of streaming on labels’ life through the exploitation of three quantitative databases. Streaming is a major external change for the music consumption and music producers. As labels are dealing with both producers and consumers, they may have been hardly impacted by this change. Yet there was a need to identify the changes that streaming brought and its impact for the organizations that decided not to adopt it. The ecology of population framework and the death vs dynamism dyad was supposed to give a clear reading of this phenomenon. In order to identify labels that did not adopt streaming, three databases were tested,…
Offensive Transitions in High-Performance Football: Differences Between UEFA Euro 2008 and UEFA Euro 2016
2019
[Abstract] Coaches, footballers and researchers agree that offensive transitions are one of the most important moments in football today. In a sport where defense over attack dominates, with low scores on the scoreboard, the importance of these actions from the offensive point of view becomes very important. Despite this, scientific literature is still very limited on this topic. Therefore, the objectives set out in the present investigation have been two: first, by means of a proportion analysis and the application of a chisquare test, it was intended to describe the possible differences between the offensive transitions made in the UEFA Euro 2008 and UEFA Euro 2016; then, through differen…
Possession Zone as a Performance Indicator in Football. The Game of the Best Teams
2017
Possession time in football has been widely discussed in research but few studies have analyzed the importance of the field area in which possession occurs. The objective of this study was to identify the existence of significant differences in the field zone of ball possession between successful and unsuccessful teams and to acknowledge if the match status modulates the possession model. To this end, 2,284 attacks were analyzed corresponding to the matches in the final phase of the UEFA Euro 2016 France, recording possession time and field zone in which possession occurred. Video recordings of matches were analyzed and coded post-event using notational analysis. We have found that successf…
Possession in Football: More Than a Quantitative Aspect – A Mixed Method Study
2019
The aim of the present study was to identify and differentiate the factors that determine the possession times of successful and unsuccessful elite football teams, with the purpose of identifying a more effective possession model. For this, match corresponding to the round of eighth-finals, quarter-finals, semi-finals and final of the 2016 UEFA Euro France in which 2,636 offensive sequences occurred, were analyzed. Video recordings of matches were analyzed and coded post-event using systematic observation. The performance indicators recorded and analyzed were: phase; match period; type of start-up; interaction context; intention; field zone; possession time, passes, attack outcome; match st…
Persistence in complex systems
2022
Persistence is an important characteristic of many complex systems in nature, related to how long the system remains at a certain state before changing to a different one. The study of complex systems' persistence involves different definitions and uses different techniques, depending on whether short-term or long-term persistence is considered. In this paper we discuss the most important definitions, concepts, methods, literature and latest results on persistence in complex systems. Firstly, the most used definitions of persistence in short-term and long-term cases are presented. The most relevant methods to characterize persistence are then discussed in both cases. A complete literature r…
Ursula Hicks and Vera Lutz’s Contributions to Development Finance
2018
International audience; This paper analyses the different approaches of two pioneering economists in the field of development finance, Ursula Kathleen Hicks (1896-1985) and Vera Constance Lutz (1912-1976). While research in economics in the 1950s focuses predominantly on finance in already developed countries (Goldsmith, 1969 and Gurley and Shaw, 1955), Hicks and Lutz extended the analysis to developing countries and/or regions – an original initiative for this period of time. Interested in the study of money and banking, Hicks and Lutz nevertheless had different beliefs on the way to promote economic development. This difference of thought comes from differing philosophical backgrounds.
Estimating finite mixtures of semi-Markov chains: an application to the segmentation of temporal sensory data
2019
Summary In food science, it is of great interest to obtain information about the temporal perception of aliments to create new products, to modify existing products or more generally to understand the mechanisms of perception. Temporal dominance of sensations is a technique to measure temporal perception which consists in choosing sequentially attributes describing a food product over tasting. This work introduces new statistical models based on finite mixtures of semi-Markov chains to describe data collected with the temporal dominance of sensations protocol, allowing different temporal perceptions for a same product within a population. The identifiability of the parameters of such mixtur…