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  • Open Access

    ARTICLE

    Spatio-temporal pattern detection in spatio-temporal graphs

    Use case of invasive team sports and urban road traffic

    Kamaldeep Singh Oberoi1, Géraldine Del Mondo2

    Revue Internationale de Géomatique, Vol.31, No.2, pp. 377-399, 2022, DOI:10.3166/RIG.31.377-399 c 2022

    Abstract Spatio-temporal (ST) graphs have been used in many application domains to model evolving ST phenomenon. Such models represent the underlying structure of the phenomenon in terms of its entities and different types of spatial interactions between them. The reason behind using graph-based models to represent ST phenomenon is due to the existing well-established graph analysis tools and algorithms which can be directly applied to analyze the phenomenon under consideration. In this paper, considering the use case of two distinct, highly dynamic phenomena - invasive team sports, with a focus on handball and urban road traffic, we propose a spatio-temporal graph… More >

  • Open Access

    ARTICLE

    NAMO Géoweb

    Une plateforme pour valoriser la narration et la modélisation de l’espace géographique et des territoires

    Jean-Pierre Chery1, Marie Gradeler1, Vincent Bonnal2,3,4

    Revue Internationale de Géomatique, Vol.31, No.2, pp. 355-376, 2022, DOI:10.3166/RIG.31.355-376© 2022

    Abstract The need to enhance and share generic and original information from different research projects, led to the design of a dedicated geoweb, called NAMO. Its design uses open and free functionalities that demonstrate their flexibility in an agile and iterative approach. It is in particular the development of two dimensions of valorization and positioning in geoweb 2.0 that is highlighted: narrative mapping and systemic modeling. The use of geographic information, in particular in co-construction and open science approaches, can thus be better equipped.

    RÉSUMÉ.
    Les besoins de valoriser et de partager des informations génériques et originales de différents projets… More >

  • Open Access

    ARTICLE

    Extraction et mise en contexte spatial des propositions relatives au transport dans le Grand Débat National

    Jacques Fize1, Lucile Sautot2, Martin Lentschat3, Laurence Dujourdy4, Ludovic Journaux5, Mohamed Hilal6

    Revue Internationale de Géomatique, Vol.31, No.2, pp. 329-354, 2022, DOI:10.3166/RIG.31.329-354© 2022

    Abstract The Great National Debate, launched by Emmanuel Macron in early 2019 to respond to the “Gilets jaunes” social movement, allowed the collection of citizens’ contributions on the ecological transition via an online platform. In this article, we use the corpus constituted by these contributions to identify locations where participants are asking for the development of bicycle paths and railway facilities. For this purpose, we have created a classification model to identify answers related to the theme of transportation and proposed a method for extracting contributions that reflect the contributors’ proposals. We then sought to explain the observed spatial frequency of… More >

  • Open Access

    ARTICLE

    Classification and clustering of buildings for understanding urban dynamics

    A framework for processing spatiotemporal data

    Perez Joan1, Fusco Giovanni1, Sadahiro Yukio2

    Revue Internationale de Géomatique, Vol.31, No.2, pp. 303-327, 2022, DOI:10.3166/RIG.31.303-327© 2022

    Abstract This paper presents different methods implemented with the aim of studying urban dynamics at the building level. Building types are identified within a comprehensive vector-based building inventory, spanning over at least two time points. First, basic morphometric indicators are computed for each building: area, floor-area, number of neighbors, elongation, and convexity. Based on the availability of expert knowledge, different types of classification and clustering are performed: supervised tree-like classificatory model, expert-constrained k-means and combined SOM-HCA. A grid is superimposed on the test region of Osaka (Japan) and the number of building types per cell and for each period is computed,… More >

  • Open Access

    ARTICLE

    Building types in France

    Clustering building morphometrics using national spatial data

    Alessandro Araldi1, David Emsellem2, Giovanni Fusco1, Andrea Tettamanzi3, Denis Overal2

    Revue Internationale de Géomatique, Vol.31, No.2, pp. 265-302, 2022, DOI:10.3166/RIG.31.265-302© 2022

    Abstract The identification and description of building typologies play a fundamental role in the understanding of the overall built-up form. A growing body of research is developing and implementing sophisticated, computer-aided protocols for the identification of building typologies. This paper shares the same goal. An innovative data-driven procedure for the unsupervised identification and description of building types and organization is here presented. After a specific pre-processing procedure, we develop an unsupervised clustering combining a new algorithm of Naive Bayes inference and hierarchical ascendant approaches relying on six morphometric features of buildings. This protocol allows us to identify groups of buildings sharing… More >

  • Open Access

    ARTICLE

    Implementation of a solar model and shadow plotting in the context of a 2D GIS

    A validation based on radiometric measurements

    Thomas Leduc, Xenia Stavropulos-Laffaille, Ignacio Requena-Ruiz

    Revue Internationale de Géomatique, Vol.31, No.2, pp. 241-263, 2022, DOI:10.3166/RIG.31.241-263©2022

    Abstract The adaptation of public spaces to episodes of intense heat is now a major challenge for cities. With this in mind, this article presents a contribution aimed at delineating and handling the shadows on the ground or in a horizontal plane at a given height, whether it comes from buildings, street furniture or the tree cover. After a comparison with shadows obtained via two reference tools, we present two urban sites that mix shadows of different origins and, in addition, different indicators. The results of the simulations are compared with pyranometric surveys carried out on site. The aim of these… More >

  • Open Access

    EDITORIAL

    ÉDITORIAL

    François PINET, Didier JOSSELIN, Alain BOUJU

    Revue Internationale de Géomatique, Vol.31, No.2, pp. 239-240, 2022, DOI:10.3166/RIG.31.239-240©2022

    Abstract This article has no abstract. More >

  • Open Access

    EDITORIAL

    Editorial: Welcome Message from Editor-in-Chief, Xuming Mo

    Xuming Mo*

    Congenital Heart Disease, Vol.19, No.1, pp. 1-3, 2024, DOI:10.32604/chd.2024.051192

    Abstract This article has no abstract. More >

  • Open Access

    ARTICLE

    Impact of Atrial Septal Defect Closure on Mortality in Older Patients

    Sipawath Khamplod1,2, Yodying Kaolawanich1,2, Khemajira Karaketklang3, Nithima Ratanasit1,2,*

    Congenital Heart Disease, Vol.19, No.1, pp. 93-105, 2024, DOI:10.32604/chd.2024.048631

    Abstract Background: Atrial septal defect (ASD) is a common form of adult congenital heart disease that can lead to long-term adverse outcomes if left untreated. Early closure of ASD has been associated with excellent outcomes and lower complication rates. However, there is limited evidence regarding the prognosis of ASD closure in older adults. This study aims to evaluate the mortality rates in older ASD patients with and without closure. Methods: A retrospective cohort study was conducted on patients aged 40 years or older with ASD between 2001 and 2017. Patients were followed up to assess all-cause mortality. Univariable and multivariable analyses… More > Graphic Abstract

    Impact of Atrial Septal Defect Closure on Mortality in Older Patients

  • Open Access

    CASE REPORT

    Prenatal Diagnosis of an Apically Located Congenital Left Ventricular Aneurysm: A Rare Case

    Yücel Kaya1,*, And Yavuz1, Hasan Berkan Sayal1, Büşra Tsakir1, Gökalp Kabacaoğlu1, Kadriye Nilay Özcan2

    Congenital Heart Disease, Vol.19, No.1, pp. 123-129, 2024, DOI:10.32604/chd.2024.048145

    Abstract Congenital ventricular aneurysm is a very rare cardiac anomaly. A diagnosis can be made during the prenatal period using fetal echocardiography. This study presents a very rare apically located left ventricular aneurysm case, and the relevant literature was reviewed and discussed. In this case, a 35-year-old, gravida 2, parity 1 pregnant woman at 24 weeks of gestation, displayed a wide aneurysmal image in the left ventricular apical wall on fetal echocardiography. There was a 1.79 mm muscular ventricular septal defect at the apical region of the interventricular septum. In the course of the color Doppler ultrasonography examination, an aberrant fibrous… More >

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