Listar Artículos, capítulos, libros...UCO por autor "2c3c5f0f-bb71-4377-9027-5290b938f060"
Mostrando ítems 1-20 de 22
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A 3D Descriptive Geometry Problem-Solving Methodology Using CAD and Orthographic Projection
Gutiérrez de Ravé Agüera, Eduardo; Jiménez-Hornero, Francisco José (MDPI, 2024)In solving descriptive geometry (DG) problems, board (i.e., hand drawing) methods are frequently used, despite this discipline is still very important to enhance spatial vision. These methods are very different from CAD ... -
A Linux cluster of personal computers for the numerical simulation of natural airflows in greenhouses using a lattice model
Jiménez Hornero, Jorge; Jiménez-Hornero, Francisco José; Giráldez Cervera, Juan Vicente (Elsevier, 2006)Some numerical models need a considerable computational effort to run their simulations. This fact is translated into long execution times delaying the decisions that have to be taken by the modeller in order to obtain the ... -
A sliding window-based algorithm for faster transformation of time series into complex networks
Carmona-Cabezas, Rafael; Gómez-Gómez, Javier; Gutiérrez de Ravé Agüera, Eduardo; Jiménez-Hornero, Francisco José (AIP Publishing, 2019)A new alternative method to approximate the Visibility Graph (VG) of a time series has been introduced here. It exploits the fact that most of the nodes in the resulting network are not connected to those that are far away ... -
An educational computer tool for simulating long-term soil erosion on agricultural landscapes
Jiménez-Hornero, Francisco José; Giráldez Cervera, Juan Vicente; Laguna, Ana; Jiménez Hornero, Jorge (Wiley, 2009)Due to its economic and environmental impacts, soil erosion has been a major concern to farmers, engineers and policy makers in recent years. Water and tilling are two of the main agents responsible for this phenomenon and ... -
Analysis of Air Mean Temperature Anomalies by Using Horizontal Visibility Graphs
Gómez-Gómez, Javier; Carmona-Cabezas, Rafael; Sánchez-López, Elena; Gutiérrez de Ravé Agüera, Eduardo; Jiménez-Hornero, Francisco José (MDPI, 2021)The last decades have been successively warmer at the Earth’s surface. An increasing interest in climate variability is appearing, and many research works have investigated the main effects on different climate variables. ... -
Background PM10 atmosphere: In the seek of a multifractal characterization using complex networks
Plocoste, Thomas; Carmona-Cabezas, Rafael; Jiménez-Hornero, Francisco José; Gutiérrez de Ravé Agüera, Eduardo (Elsevier, 2021)In the literature, several epidemiological studies have already associated respiratory and cardiovascular diseases to acute exposure of mineral dust. However, frail people are also sensitive to chronic exposure to particulate ... -
Can complex networks describe the urban and rural tropospheric O3 dynamics?
Carmona-Cabezas, Rafael; Gómez-Gómez, Javier; Ariza Villaverde, Ana Belén; Gutiérrez de Ravé Agüera, Eduardo; Jiménez-Hornero, Francisco José (Elsevier, 2019)Tropospheric ozone (O3)time series have been converted into complex networks through the recent so-called Visibility Graph (VG), using the data from air quality stations located in the western part of Andalusia (Spain). ... -
Checking complex networks indicators in search of singular episodes of the photochemical smog
Carmona-Cabezas, Rafael; Gómez-Gómez, Javier; Gutiérrez de Ravé Agüera, Eduardo; Jiménez-Hornero, Francisco José (Elsevier, 2020)A set of indicators derived from the analysis of complex networks have been introduced to identify singularities on a time series. To that end, the Visibility Graphs (VG) from three different signals related to photochemical ... -
Daylight Saving Time transitions and Cardiovascular Disease in Andalusia: Time Series Modeling and Analysis Using Visibility Graphs
Rodríguez-Cortés, Francisco José; Jiménez Hornero, Jorge; Alcalá Díaz, Juan Francisco; Jiménez-Hornero, Francisco José; Romero-Cabrera, Juan Luis; Cappadona, Rosaria; Manfredini, Roberto; López Soto, Pablo Jesús (Sage, 2022)The present study aimed to determine whether transitions both to and from daylight saving time (DST) led to an increase in the incidence of hospital admissions for major acute cardiovascular events (MACE). To support the ... -
Digital Image Filtering Optimization Supporting Iberian Ham Quality Prediction
Perán-Sánchez, Francisco; Serrano, Salud; Gutiérrez de Ravé Agüera, Eduardo; Sánchez-López, Elena; Cumplido, Ana; Jiménez-Hornero, Francisco José (MDPI, 2020)Digital images of food for later analysis tend to be heterogeneous in terms of color and luminosity. Improving these images by using filters is necessary and crucial before further processing. This paper compares the non-use ... -
Improving graph-based detection of singular events for photochemical smog agents
Carmona-Cabezas, Rafael; Gómez-Gómez, Javier; Gutiérrez de Ravé Agüera, Eduardo; Sánchez-López, Elena; Serrano, João; Jiménez-Hornero, Francisco José (Elsevier, 2020)Recently, a set of graph-based tools have been introduced for the identification of singular events of O3, NO2 and temperature time series, as well as description of their dynamics. These are based on the use of the ... -
Joint multifractal analysis of air temperature, relative humidity and reference evapotranspiration in the middle zone of the Guadalquivir river valley
Ariza Villaverde, Ana Belén; Pavón Domínguez, Pablo; Carmona-Cabezas, Rafael; Gutiérrez de Ravé Agüera, Eduardo; Jiménez-Hornero, Francisco José (Elsevier, 2019)Previous works have analysed the relationship existing between reference evapotranspiration (ET0) and other climatic variables under a one-at-a-time perturbation condition. However, due to the physical relationships between ... -
Multifractal analysis application to the study of fat and its infiltration in Iberian ham: Influence of racial and feeding factors and type of slicing
Serrano, Salud; Perán-Sánchez, Francisco; Gutiérrez de Ravé Agüera, Eduardo; Cumplido, Ana; Jiménez-Hornero, Francisco José (Elsevier, 2019)This paper explores the multifractal features of different commercial designations of Iberian ham (acorn 100% Iberian ham, acorn Iberian ham, feed/pasture Iberian ham and feed Iberian ham). This study has been done by ... -
Multifractal characterisation of particulate matter (PM10) time series in the Caribbean basin using visibility graphs
Plocoste, Thomas; Carmona-Cabezas, Rafael; Jiménez-Hornero, Francisco José; Gutiérrez de Ravé Agüera, Eduardo; Calif, Rudy (Elsevier, 2021)A good knowledge of pollutant time series behavior is fundamental to elaborate strategies and construct tools to protect human health. In Caribbean area, air quality is frequently deteriorated by the transport of African ... -
Multifractal detrended fluctuation analysis of sheep livestock prices in origin
Pavón Domínguez, Pablo; Serrano, Salud; Jiménez-Hornero, Francisco José; Jiménez Hornero, Jorge; Gutiérrez de Ravé Agüera, Eduardo; Ariza Villaverde, Ana Belén (Elsevier, 2013)The multifractal detrended fluctuation analysis (MF-DFA) is used to verify whether or not the returns of time series of prices paid to farmers in original markets can be described by the multifractal approach. By way of ... -
Multifractal detrended fluctuation analysis of temperature in Spain (1960–2019)
Gómez-Gómez, Javier; Carmona-Cabezas, Rafael; Ariza Villaverde, Ana Belén; Gutiérrez de Ravé Agüera, Eduardo; Jiménez-Hornero, Francisco José (Elsevier, 2021)In the last decades, an ever-growing number of studies are focusing on the extreme weather conditions related to the climate change. Some of them are based on multifractal approaches, such as the Multifractal Detrended ... -
Multifractal fluctuations of the precipitation in Spain (1960–2019)
Gómez-Gómez, Javier; Carmona-Cabezas, Rafael; Sánchez-López, Elena; Gutiérrez de Ravé Agüera, Eduardo; Jiménez-Hornero, Francisco José (Elsevier, 2022)In this work, an analysis of multifractal parameters of daily precipitation series over the Iberian Peninsula was performed in two 30-year periods to explore whether these properties follow any pattern. Fluctuations of ... -
Multiplex Visibility Graphs as a complementary tool for describing the relation between ground level O3 and No2
Carmona-Cabezas, Rafael; Gómez-Gómez, Javier; Ariza Villaverde, Ana Belén; Gutiérrez de Ravé Agüera, Eduardo; Jiménez-Hornero, Francisco José (Elsevier, 2020)The usage of multilayer complex networks for the analysis of correlations among environmental variables (such as O3and NO2concentrations from the photochemical smog) is investigated in this work. The mentioned technique ... -
Relationships between Reference Evapotranspiration and Meteorological Variables in the Middle Zone of the Guadalquivir River Valley Explained by Multifractal Detrended Cross-Correlation Analysis
Gómez-Gómez, Javier; Ariza Villaverde, Ana Belén; Gutiérrez de Ravé Agüera, Eduardo; Jiménez-Hornero, Francisco José (MDPI, 2023)The multifractal relationship between reference evapotranspiration (ET0), computed by the Penmann-Monteith equation (PM), relative humidity (RH) and mean surface temperature (Tmean) was studied in the middle zone of the ... -
Universal multifractal description of an hourly rainfall time series from a location in southern Spain
García-Marín, A.P.; Jiménez-Hornero, Francisco José; Ayuso-Muñoz, J.L. (Universidad Nacional Autónoma de México, 2008)El formalismo multifractal de turbulencia ha sido usado para llevar a cabo el análisis de la estructura temporal, para escalas desde 1 hora hasta casi 6 meses, de la serie de datos de lluvia horaria registrada durante ...