Purificación Vicente-Galindo

Universidad de Salamanca · Department of Statistics

This paper aims to categorize countries by their e-participation index, according to political, capacity, and governmental environment factors; examine how they are projected based on these factors; and analyze whether this projection corresponds to the current state of e-participation development. It is the first study to provide an overview of th...

Cocoa is the main crop in Ecuador’s agricultural sector and is the most important to the country’s economy. This crop is mainly threatened by moniliasis caused by Moniliophthora roreri and Moniliophthora perniciosa. Monialisis is a disease that causes the watery rot of cocoa beans, causing serious yield losses at crop harvest and great economic los...

Agriculture is one of the main sectors of Ecuador’s economy, and the principal agricultural product for exportation is cocoa. Flour samples of two mixtures were taken: a total of 50 samples of 85% cocoa bean shell (harvested from a farm) mixed with 15% soy flour (Mixture 1) and 50 samples of 75% cocoa bean shell (harvested from a farm) mixed with 2...

Purpose The airway complex is modified by palatine expansion. Computer tomography has been used in the past to determine the change in volume, but there was a lack of a specific, reproducible method for this purpose. The present study sought to determine the accuracy, reproducibility, and repeatability of an innovative digital measurement technique...

Resumen: El Ranking de Shanghai (ARWU) ha alcanzado tal prestigio que una buena posición en esta lista está aso-ciada a calidad y reputación. El objetivo de esta investigación es analizar si las universidades clasificadas en ARWU muestran el mejor desempeño académico. Se han seleccionado las tasas de Rendimiento, Graduación y Abandono de los estudi...

In this research, a dataset of growth performances and nutritional composition of juvenile Litopenaeus vannamei after being fed two diets that include aquaculture binder with sardine for 7 weeks was analyzed using data mining techniques: the K-Means Clustering Algorithm and PCA Biplot, to have a visualization of each parameter (vector) measured. Th...

There is a high prevalence of stigma among medical students towards mental illness, which can have far reaching negative consequences. It is essential to intervene and modify their preconceptions in order to fight against stigma. The objective of this study is to describe the types and effectiveness of interventions to reduce mental illness-related...

In this work, a statistical method for the segmentation of samples and/or populations is presented, which is based on a ternary tree structure. This approach overcomes known limitations of other segmentation methods such as CHAID, concerning the multivariate response and the non-symmetric relationship between explanatory and response variables. The...

Background Response Shift (RS) refers to the idea that an individual may undergo changes in its health-related quality of life (HRQOL). If internal standard, values, or reconceptualization of HRQOL change over time, then answer to the same items by the same individuals may not be comparable over time. Traditional measures to evaluate RS is prone to...

El Ranking de Shanghai (ARWU) ha alcanzado tal prestigio que una buena posición en esta lista está asociada a calidad y reputación. El objetivo de esta investigación es analizar si las universidades clasificadas en ARWU muestran el mejor desempeño académico. Se han seleccionado las tasas de Rendimiento, Graduación y Abandono de los estudiantes de G...

Reliable, impartial, and timely data models are urgently needed to inform global sustainability measures. As a response, implicit and explicit fuzzy methods that evaluate qualitative and quantitative variables have been proposed. Meanwhile, decision-makers are often compelled to address immediate over long-term risks. In the era of big data, artifi...

Vision-related quality of life (QoL) analyzes the visual function concerning individual well-being based on activity and social participation. Because QoL is a multivariate construct, a multivariate statistical method must be used to analyze this construct. In this paper, we present a methodology based on STATIS multivariate three-way methods to as...

Governance is a characteristic of political systems that indicates the degrees of cooperation and interaction between a state and non-state actors when it comes to decision making that will have an impact on society. The aim of our research focuses on analysing the behaviour of the Worldwide Governance Indicators (WGI) over the 2002–2019 period, si...

Background and Objectives: Currently, one of the most discouraging aspects for many patients undergoing dental procedures is the administration of anaesthesia. Consequently, there is a constant search for new techniques to avoid the invasive and painful nature of the injection. A new motorised syringe system (Dentapen®) has recently been developed,...

Citation: Ballesteros-Espinoza, V.I.; Rodríguez-Rosa, M.; Sánchez-García, A.B.; Vicente-Galindo, P. Proposal of the Dichotomous STATIS DUAL Method: Software and Application for the Analysis of Dichotomous Data, Applied to the Test of Learning Styles in University Students. Mathematics Abstract: The present work analyzed a review of methods for anal...

In this study, a data set of mycelial and cultural characteristics of hybrid strains of Pleurotus ostreatus and Pleurotus djamor were analyzed using three data-mining techniques: the K-medoids clustering algorithm, PCA biplot and the association rules algorithm. The characteristics evaluated were as follows: maximum velocity; lag phase; biomass; an...

In recent years, social responsibility has been revolutionizing sustainable development. After the development of new mathematical techniques, the improvement of computers’ processing capacity and the greater availability of possible explanatory variables, the analysis of these topics is moving towards the use of different machine learning techniqu...

Multi-set multivariate data analysis methods provide a way to analyze a series of tables together. In particular, the STATIS-dual method is applied in data tables where individuals can vary from one table to another, but the variables that are analyzed remain fixed. However, when you have a large number of variables or indicators, interpretation th...

Data of the commercial parameters of Pleurotus ostreatus and Pleurotus djamor were analyzed using the data mining technique: K-means clustering algorithm. The parameters evaluated were: biological efficiency, crop yield ratio, productivity rate, nutritional composition, antioxidant and antimicrobial activities in the production of fruit bodies of 5...

International rankings have achieved great prestige as an instrument for measuring university excellence as a quality assurance mechanism. Thus, this research aims to observe the behavior of the best-positioned universities in these rankings, as well as the trajectories of indicators and institutions. In fact, the Top-15 universities of ARWU, THE,...

Introduction: Multiple gestational and early life factors have been described as the variables that increase the risk for each phenotype of infantile wheezing. Our objective was to study the evolution of wheezing in a cohort of children followed up to 9-10 years of age and its relationship with different perinatal risk factors. Methods: A longit...

Global rankings help boost the international reputation of universities, which thus attempt to achieve good positions on them. These rankings attract great interest each year and are followed attentively by stakeholders in higher education. This paper investigates the trajectory of Spanish universities in the ARWU and THE rankings over the last 5 y...

The aim of this study was to show a novel and accurate digital measurement protocol by analyzing the area and volume for interproximal tooth enamel surface reduction. In total, 14 lower teeth from all dental sectors were embedded into an epoxy resin and distributed as the lower dental arch, keeping the contact points. The experimental model was sub...

Currently, the debate on corporate social responsibility (CSR) and the strategies implemented by organizations to disseminate their business actions, fuels the discussion on aspects that point to sustainable development. To show their CSR strategies, one of the mechanisms used by companies is the presentation of sustainability reports. In this work...

This edited volume is composed of twenty-one chapters and covers topics such as digital skills, teaching-learning methodologies, innovative projects and proposals, and reflections on the Spanish University context.

Resumen: En este estudio se presentan los elementos constitutivos del diseño pedagógico del mooc «Estadística para investigadores» de la Universidad de Salamanca. En su diseño partimos de cuatro ejes: (i) tipología del aprendizaje estadístico, características y la red proposicional para su representación; (ii) capacidades del entorno virtual para p...

Rapid economic growth, expanding populations and increasing prosperity are driving up demand for energy, water and food, especially in developing countries. To understand the energy consumption of a country, we used the Multi-Scale Integrated Analysis of Societal and Ecosystem Metabolism (MuSIASEM) approach. The MuSIASEM is an innovative approach t...

The main objective of this research is to find the sustainability gradients of Brazilian companies and sort them as a function of economic, environmental and social components, using multivariate methods for dichotomous data, in order to establish the foundations for better knowledge of the trends and sustainability reporting habits of Brazil. The...

The main objective of this paper was to see whether different countries around the world show differences in their sustainability levels as captured in the indicators from the Sustainable Society Index (SSI, Van de Kerk and Manuel in Ecol Econ 66:228–242, 2012) according to their level of income. To do so, the X-STATIS and CO-STATIS multivariate te...

Background/Objective: Emotional intelligence is a variable which has been the subject of significantly increased research in recent years. Relationships have been shown with both physical and psychological problems. The aim of this study is to analyse the direct and indirect effect that emotional intelligence exerts over the manifestation of physic...

Background: Cutaneous squamous cell carcinoma (CSCC) is the second most widespread cancer in humans and its incidence is rising. These tumours can evolve as diseases of poor prognosis, and therefore it is important to identify new markers to better predict its clinical evolution. Objectives: We aimed to identify the expression pattern of microRN...

El Nexo Agua-Energía-Alimentos se basa en una visión integral de la sostenibilidad donde se trata de establecer el equilibrio entre las necesidades de las personas y del medio ambiente. El objetivo principal de este trabajo es enriquecer la gramática MuSIASEM con información procedente de un BIPLOT y con ello mejorar la eficiencia de los modelos ex...

En esta investigación se ha analizado la sostenibilidad económica, ambiental y social de 1987 informes publicados por las empresas europeas, a través del índice GRI, a lo largo de los años 2011 y 2012 (GRI G3 y GRI G3.1), usando métodos multivariantes diseñados para la inspección de los datos dicotómicos, concretamente el Biplot Logístico Externo,...

Immigration is not a historical phenomenon associated to population displacements in concrete historical periods but has become a stable phenomenon that begins after the Second World War with the decolonization processes, the economical growth and the necessity of labor force. The increase in immigrant flows and in immigrant population is one of th...

We examine the job situation of women living in rural Salamanca, Spain, using principal coordinates analysis to identify the profile of these women (specifically, those with declared vs. undeclared jobs) and explore what they believe would improve their employment situations. Four well-differentiated groups were identified: two groups included rura...

A biplot is a graphical representation of two-mode multivariate data based on markers for rows and columns often provided in a two-dimensional space. These markers define parameters that help to interpret goodness of fit, quality of the representation and variability and relationships between variables. However, such parameters are estimated as poi...

The aim of this study is to analyze the environmental performance of countries and the variables that can influence it. At the same time, we performed a multivariate analysis using the HJ-biplot, an exploratory method that looks for hidden patterns in the data, obtained from the usual singular value decomposition (SVD) of the data matrix, to contex...

Background: Burnout syndrome is a highly prevalent disorder in a wide range of professional groups, and is associated with substantial psychophysiological alterations. Nevertheless, this syndrome has not been analyzed in depth among the clergy, a group which fulfils a fundamental social function and has to deal with numerous stressors that increas...

El objetivo de este trabajo es analizar la estructura factorial y evaluar, desde un punto de vista psicométrico, el cuestionario CHAEA de estilos de aprendizaje, en una población de estudiantes de distintas facultades de la Universidad de Salamanca. Para comprobar la validez del cuestionario se ha realizado un Análisis Factorial Exploratorio y se h...

A point of interest is the bias in self-assessments of quality of life of the individual known as Response shift due to the dynamic nature of the construct, its components and the theoretical models proposed in the literature to explain the phenomenon, both are of interest. Analytical approaches are discussed to detect and evaluate Response Shift i...

One of the most useful techniques to analyse latent structures is exploratory Factor Analysis. When several data matrices, arising from different occasions and/or groups, are obtained, the comparison and integration of the resulting latent spaces is an important task. In this paper we propose a factor model for several groups that includes shared c...