Geraldine/hal_univcotedazur_shs_articles_2013-2023 huggingface dataset:
Mapping Mangrove Zonation Changes in Senegal with Landsat Imagery Using an OBIA Approach Combined with Linear Spectral Unmixing
Auteurs : Florent Lombard,Julien Andrieu
Revue : Remote Sensing
Éditeur : MDPI
Année : 2021

The mangrove areas in Senegal have fluctuated considerably over the last few decades\, and it is therefore important to monitor the evolution of forest cover in order to orient and optimise forestry policies. This study presents a method for mapping plant formations to monitor and study changes in zonation within the mangroves of Senegal. Using Landsat ETM+ and Landsat 8 OLI images merged to a 15-m resolution with a pansharpening method\, a processing chain that combines an OBIA approach and linear spectral unmixing was developed to detect changes in mangrove zonation through a diachronic analysis. The accuracy of the discriminations was evaluated with kappa indices\, which were 0.8 for the Saloum delta and 0.83 for the Casamance estuary. Over the last 20 years\, the mangroves of Senegal have increased in surface area. However\, the dynamics of zonation differ between the two main mangrove hydrosystems of Senegal. In Casamance\, a colonisation process is underway. In the Saloum\, Rhizophora mangle is undergoing a process of densification in mangroves and appears to reproduce well in both regions. Furthermore\, this study confirms\, on a regional scale\, observations in the literature noting the lack of Avicennia germinans reproduction on a local scale. In the long term\, these regeneration gaps may prevent the mangrove from colonising the upper tidal zones in the Saloum. Therefore\, it would be appropriate to redirect conservation policies towards reforestation efforts in the Saloum rather than in Casamance and to focus these actions on the perpetuation of Avicennia germinans rather than Rhizophora mangle\, which has no difficulty in reproducing. From this perspective\, it is necessary to gain a more in-depth understanding of the specific factors that promote the success of Avicennia germinans seeding
Vacant lands on French Mediterranean coastlines: Inventory\, agricultural opportunities\, and prospective scenarios
Auteurs : Laure Casanova Enault,Tatiana Popoff,Marta Debolini
Revue : Land Use Policy
Éditeur : Elsevier
Année : 2021

Mediterranean coastlines are undergoing a strong process of urbanization due not only to demographic growth\, but also to the development of tourism. Moreover\, municipalities have become more dependent on residential tax income\, which creates a vicious circle for local urban planning. The Var department\, in south-eastern France\, can be considered as a relevaznt example of these dynamics\, where residential urban sprawl is threatening existing vacant lands. At the same time\, most of these territories still have a high natural value and agricultural potential. In this paper\, we describe our inventory of vacant lands on a large territory (two intermunicipalities\, which include 24 municipalities) at parcel scale\, to give an innovative assessment of this phenomenon. We investigated non-residential development possibilities for existing vacant lands through possible pathways for sustainable planning projects. In particular\, the impacts of increases in agricultural spaces were explored in the normative scenarios and were measured through socio-economic indexes. This work shows that there is still a large amount of vacant land (23.5% and 37% respectively for the two case studies) with different opportunities for agricultural valorization. It had to be taken into account that these lands are often on the fringe of urban areas\, where the urbanization process is stronger. The possible alternative scenarios suggested here can be used as examples for policy makers\, to encourage a different point of view regarding land use planning.
Анализ ландшафтной структуры восточного склона хребта Орулган,Landscape structure analysis of the Orulgan Ridge eastern slope
Auteurs : Moisei Ivanovich Zakharov,Yuri Danilov,Sébastien Gadal,Elena Troeva,Mikhail Cherosov
Revue : Успехи современного естествознания (Advances in Current Natural Sciences)
Année : 2022

The aim of the research is to analyze the landscape structure of the eastern slope of the Orulgan ridge using complex geoinformation modelling. We use the field surveys data made in 2018-2019. The geoinformation modelling technique consists of the supervised pixel-based classification of time series remote sensing data of Landsat 8 OLI/ TIRS and Sentinel 2 MSI and TPI-based landform classification using ASTER GDEM scenes. As a result of a combination of the obtained physiognomic criteria\, relief and vegetation\, the types of terrain and landscape units of the study area were identified. The Random Forest classifier was the most efficient in identifying 8 association groups with an overall accuracy of 79.7% by the confusion matrix. With an overlay of terrain types and vegetation associations\, we allow the creation of the permafrost-landscape map. In total\, 22 landscape units were identified within the study area. The use of geoinformation modeling made it possible to obtain a detailed landscape structure of study area and assess the main properties of the landscape spatial organization of the eastern slope of the Orulgan ridge. The mountainous area characterized by strong dissection\, causes a well-defined vertical zonation. In general\, the most common altitudinal permafrost landscapes is mountain woodlands (57% of the territory) and mountain tundra occupies 16%. Intrazonal mountain and boreal landscapes occupy 15%. The leading role in the landscape diversity of the eastern slope of the Orulgan Range is played by a combination of various geological structures that determine the types of erosion-tectonic (mountain-slope and rocky mountain tops)\, glacial-accumulative (moraine\, outwash and glacial-valley) and erosion-accumulative terrain. (medium-altitude terrace and low-terrace) origin.
Retail Fabric Assessment: Describing retail patterns within urban space
Auteurs : Alessandro Araldi,Giovanni Fusco
Revue : Cities
Éditeur : Elsevier
Année : 2019

Several models of retail activity distribution have been proposed in the scientific literature. Despite the large debate on their validity\, few empirical studies have been proposed. Micro retail location data have been ana-lyzed with different approaches; point pattern analysis methodologies have recently been presented as a way to detect spatial concentrations of points. Yet\, concentration is not the only significant aspect defining retail fabrics. Economic geography recognizes that form and function participate simultaneously to the definition of retail districts. In this paper a new bottom-up data-based methodology is proposed to assess retail distribution starting from a store point pattern representation on a street network. Theory-based indicators are implemented with the combination of geoprocessing and geostatistical approaches\, allowing the recognition of morpho-functional patterns. Bayesian classification methods are then applied to these spatial patterns\, recognized as being retail fabrics characterizing the retailscape of a vast metropolitan area. This methodology is then applied to the real case study of the French Riviera metropolitan region. Retail fabrics and their spatial organization are identified and described.
Etude d'hybridation du langage hydraulique Français en Wolof,Study of hybridization of French hydraulic language into Wolof
Auteurs : Saliou Kamara,Kalidou Sy
Revue : Liens nouvelle série
Éditeur : Faculté Des Sciences et Technologies de l'Education et de la Formation, Université Cheikh Anta Diop de Dakar
Année : 2021

Dans la vallée du fleuve Sénégal\, les politiques d’aménagements hydroagricoles sont relativement anciennes. Depuis le milieu des années 1980\, elle s’est traduite par un changement des façons culturales (traditionnel vs moderne). Cela interroge l’appropriation de nouvelles techniques culturales par une population rurale faiblement alphabétisée et formée. Il ressort de cet article l’émergence d’un langage hydraulique hybride dans les périmètres irrigués. Cette situation est le résultat du développement de la démarche participative dans la vallée du fleuve Sénégal et de l’essor d’un lexique hydraulique local pour mieux intégrer l’agriculture irriguée dans les transformations socio-économiques.

Mots-clés : Terminology,Alphabétisation,Hydraulique moderne,Anthroposémiotique,Fleuve Sénégal,Terminologie,Anthroposémiotique,Fleuve Sénégal,Terminologie,Modern hydraulics
La géographie selon LinkedIn. L’exemple de la région SUD.,Geography according to LinkedIn. The example of the SUD Region
Auteurs : Aurélia Bernard,Cyrille Genre-Grandpierre
Revue : NETCOM : Réseaux, communication et territoires / Networks and Communications Studies
Éditeur : Netcom Association
Année : 2021

LinkedIn is a professional social network that facilitates information exchanges and networking among its members. Based on the user profiles\, the platform's algorithm assigns them to a municipality\, a sector\, or a region\, thus drawing up a spatial polarization. However the logic of the resulting partition of space is difficult to follow: the assignments vary for a given municipality\, and the partitions obtained do not correspond to those of traditional geography. As these assignments potentially determine the establishment of contacts between members\, they may induce performative effects on the labor market. In this current work\, we therefore seek to better describe and understand them. The polarizations of the platform were revealed using a database on LinkedIn members in the SUD region. They were then compared to traditional geography partitions. Finally\, we study the differences in LinkedIn polarizations depending on the jobs of the platform's members.
Une évaluation des proximités agroalimentaires : le cas des circuits courts et de proximité de la ville de Nice.
Auteurs : Juliette Benedetti,Karine Emsellem,S. Bouissou
Revue : Annales de géographie
Éditeur : Armand Colin
Année : 2023

Dans un contexte de développement d’un intérêt politique\, scientifique et citoyen pour les systèmes alimentaires localisés\, ce travail s’intéresse aux formes diverses des circuits courts et de proximité (CCP) à partir du cas de la ville de Nice. La combinaison de méthodologies quantitatives (constitution d’une base de données à partir d’une enquête de terrain\, analyse statistique et méthode de classification) permet de caractériser les différentes formes de CCP niçois. Réalisée à partir de variables a-spatiales - proximités fonctionnelle (nombre d’intermédiaires au long du circuit) et relationnelle (niveau d’information sur la qualité et l’origine du produit) - la classification identifie trois types de CCP\, analysés à la lumière de leur emprise spatiale (distance entre lieux de production et de vente)\, des typologies de produits échangés et des types de points de vente les commercialisant. En résulte une requalification des termes « court » et « de proximité » qui caractérisent les circuits. Le travail conclut qu’il s’agit de circuits présentant un nombre d’intermédiaires inférieur ou égal à 1 entre producteur et consommateur\, avec une qualité d’information satisfaisante dispensée au consommateur sur le produit\, et dont l’ensemble des étapes sont réalisées dans un périmètre géographique réduit\, d’ordre régional dans le cas niçois.

Mots-clés : Circuits courts et de proximité,Relocalisation,Système alimentaire,Alimentation locale,Nice
Climate change and adaptation to coastal risks as perceived in two major coastal cities: An exploratory study in Marseilles and Nice (France)
Auteurs : Alexandra Schleyer-Lindenmann,Ruchi Mudaliar,Parul Rishi,Samuel Robert
Revue : Ocean and Coastal Management
Éditeur : Elsevier
Année : 2022

Adaptation to climate change and related coastal risks are key issues for communities living close to the Mediterranean Sea. The study explores how inhabitants of Marseilles and Nice\, two major cities on the French Mediterranean coast\, perceive recent climate change and how competent they find themselves in coping with changing climate and coastal risks. It also analyses the influence of socio-demographic and psycho-social variables on their perceived level of coping. The tool used is the French translated and adapted version of the Climate Change Perception Inventory (CCPI) by Rishi & Mudaliar (2014)\, filled in by a total of 475 participants in the study. Results show that in both cities\, respondents are aware of climate change\, but are not really worried about it. Marseilles and Nice differ in the role played by Coastal Subjective Well-Being. In both samples\, the most important predictor of Coping and Adaptation is Climate related Stress and Emotional Concern. Finally\, the study highlights the importance of considering psycho-social variables in the management of Climate Change Adaptation.

Mots-clés : OHM Littoral méditerranéen,Labex DRIIHM
Impact des transitions urbaine et numérique sur la représentation des lieux,Impact of urban and digital transitions on places representation
Auteurs : Dorothée Marchand,Emeline Bailly ,Aimée Casal,Pierre Dias
Revue : Développement durable et territoires
Éditeur : Réseau « Développement durable et territoires fragiles »
Année : 2021

NUMCES research (Digital and creation of urban spaces) raises the question of the effect of urban and digital transition on the relationship between individuals and their living spaces. We carried out a survey with commented routes in an Île-de-France district\, where an urban renewal project was in course. The results show that digital assessment and the transformation of the city vary according to the representation of the place\, constructed by identity and urban values. This dual transition is accompanied by more uncertainties and worries than opportunities as to the consequences of this transitory situation.

Mots-clés : Transition numérique,Transition urbaine,Représentation d’un lieu,Mémoire sociale,Identité de lieu
Заторные наводнения на реке лена на территории городского округа Г. Якутск,Ice-Jam Flooding of Lena River in the Municipal District of Yakutsk
Auteurs : Vilena Efremova,Yuri Danilov,Sébastien Gadal
Revue : Meridian
Éditeur : Издательство ИП Осенина Ирина Леонтьевна
Année : 2019

In the last years of the 20th century and the beginning of the 21st century\, the number of flooding and ice-flooding impacting the populated areas of the Republic of Sakha (Yakutia) has significantly increased. This present research analyses the long-term hydrological data and the features of the ice drift on the average Lena for the period 1990 to 2016 with the Landsat 5 TM\, Landsat 8 OLI and Sentinel 2 MSI remote sensing data. The best methodology for the recognition\, extraction and mapping of the water flooding is based on the MNDWI water index. MNDWI water index was used to map the flood areas and limits from Tabaginsky cape to Kangalassky cape.
Mapping of Built up Areas in the Cameroonians Shores of Lake Chad and its Hinterland through based Object Classification of Sentinel 2 Data
Auteurs : Paul Gérard Gbetkom,Sébastien Gadal,Ahmed El Aboudi,Alfred Homère Ngandam Mfondoum,Mamane Barkawi Mansour Badamassi
Revue : Journal of Advanced Research in Dynamical and Control Systems
Éditeur : Institute of Advanced Scientific Research
Année : 2019

The objective of the paper is to carry out the spatial distribution of the built-up areas in the Cameroonian shores of the Lake Chad and its hinterland through orientated-object classification. The methods used combines spectral and statistical processing’s. For the Principal Component Analysis (PCA) performed\, the first component contains 87% of information. The built up areas indices have also computed\, like Urban Index (UI) and Normalized Difference Built-up Index (NDBI) based on sentinel 2 satellite images of April 2017. The components 3 and 6 of PCA and the built up indices are stacked with originals spectral bands to generate a new composite image. This new image is then segmented and classified by Support Vector Machines (SVMs) algorithm\, submitted to a threshold analysis. The result is a classified image on which the identification of built-up areas from the others spatial objects is possible and the spatial distribution of built-up areas is countable.
Особенности дешифрирования урбанизированных территорий северных городов по спутниковым снимкам landsat на примере г. Якутск,Features of Interpretation of Urban Areas of Northern Cities in Landsat Satellite Images on the Example of Yakutsk
Auteurs : Moisei Zakharov,Yuri Danilov,Sébastien Gadal
Revue : Meridian
Éditeur : Издательство ИП Осенина Ирина Леонтьевна
Année : 2019

Currently\, there are many approaches to the recognition of urbanized areas\, mainly based on the methods supervised and unsupervised spectral image classifications. D. Statakis\, K. Perakis\, I. Yu. Savin proposed an index (VIBI - Vegetation Index - Built up Index)\, which is a combination of widely known NDVI and NDBI. In this article\, we will conduct the experience of deciphering the urbanized territories of Yakutsk based on the VIBI index approach and define the features of the use for northern cities. The purpose of the study is to determine the most effective method for the urbanized territories of northern cities using the example of Yakutsk. We applied the VIBI index on Landsat 8 OLI multi-temporal for the recognition of the urban structures of Yakutsk. Images selected are from June 26\, 2017\, and November 4\, 2017. Winter images are more efficient due to the absence of open water surfaces and various types of open soils. Results of the VIBI index are combined in GIS with other urban databases for the identification of the datchas and year-round houses.
International event tourism and urban changes: Trajectories of global convention cities (1995–2020)
Auteurs : Sylvie Christofle,Carine Fournier
Revue : Journal of Convention and Event Tourism
Éditeur : Taylor & Francis (Routledge)
Année : 2022

The aim of this study is to determine the trajectories of global convention cities\, in order to identify and explain the strong interactions between urban policies and changes and the dynamics of hosting international conferences around the world. To accomplish this aim\, the major convention cities are calibrated so that their relative positions over 24 years alongside their policies for urban change can be analyzed. To do this\, we undertake a factorial correspondence analysis (FCA) combined with ascending hierarchical classification to establish a hierarchical ranking and a typology. The hosting dynamics observed reveal the strong links between material and nonmaterial urban changes and a city’s attractiveness as a convention destination. At present\, the situation still reflects the effects of the COVID-19 global pandemic. It has already had technical\, technological\, and health-related consequences for convention processes. These new factors need to be considered in further studies on convention tourism and urban changes
Glenoid retroversion: The palaeopathological perspective
Auteurs : Yves Darton,Véronique Gallien,Isabelle Richard,Cécile Paresys,Paul Bailet
Revue : International Journal of Paleopathology
Éditeur : Elsevier
Année : 2015

Retroversion of the glenoid articular plane has not received sufficient attention in palaeopathological studies. Occasionally mentioned in severe forms of osteoarthritis\, exceptionally studied in extreme congenital forms isolated or in the context of malformation syndromes and overlooked in cases of minor dysplasia\, it is nonetheless a valuable marker for identifying debilitating pathological conditions\, abnormal shoulder laxity or sequelae of obstetric palsy. It is sometimes associated with other anomalies of the shoulder\, the acromion or the coracoid processes of the scapula or the proximal end of the humerus. In this contribution\, we first define a new method for measuring glenoid retroversion based on recent embryological and anatomical findings. This new method is particularly well adapted to archaeological remains for its simplicity and the possibility of using it with very fragmentary scapulae. We then applied it to eight pathological cases of various origins\, dysplasias or acquired forms of glenoid retroversion; semiological analysis enabled the definition of diagnostic criteria for the main aetiologies. Several new diagnostic features are described\, in particular for sequelae of obstetric palsy in adults.
A multiproxy record of palaeoenvironmental conditions at the Middle Palaeolithic site of Abric del Pastor (Eastern Iberia)
Auteurs : Rory Connolly,Margarita Jambrina-Enríquez,Antonio V Herrera-Herrera,Paloma Vidal-Matutano,Ana Fagoaga,Rafael Marquina-Blasco,María Dolores Marin-Monfort,Francisco Javier Ruiz-Sánchez,César Laplana,Salvador Bailon,Leopoldo Pérez,Lucia Leierer,Cristo M Hernández,Bertila Galván,Carolina Mallol
Revue : Quaternary Science Reviews
Éditeur : Elsevier
Année : 2019

This paper presents a multiproxy palaeoenvironmental study from Abric del Pastor (Alcoy\, Spain)\, a rock shelter which has yielded evidence for Middle Palaeolithic human occupation. The sedimentary sequence has been analysed for lipid biomarker n-alkane abundances (ACL\, CPI)\, compound specific leaf wax δ2H and δ13C\, and bulk organic geochemistry (TOC\, %N\, %S)\, providing a record of past climate and local vegetation dynamics. Site formation processes have been reconstructed through the application of soil micromorphology. Analyses of anthracological\, microvertebrate and macrofaunal assemblages from selected subunits are also presented here. Our data indicates that a variable climate marked by predominantly cold conditions persisted through most of the sequence and that Neanderthal occupations in stratigraphic unit IVd\, assigned to MIS 4 or late MIS 5\, occurred in a landscape setting characterised by a mosaic of biotopes. The presence of key resources inside the ravine where the site is located suggests that the occupation of the rock shelter may have been strategically motivated by a subsistence and mobility strategy which focused on zones of localised ecological resilience\, such as intra-mountainous valleys or ravines\, during periods of global or regional environmental downturn.
From Evenk campfires to prehistoric hearths: charcoal analysis as a tool for identifying the use of rotten wood as fuel
Auteurs : Auréade Henry,Isabelle Théry-Parisot
Revue : Journal of Archaeological Science
Éditeur : Elsevier
Année : 2014

We present a new approach combining ethnoarchaeology and experimentation aiming towards a better understanding of prehistoric firewood use and management. The example of present fuel management practices among a residentially mobile group of Evenk Siberian reindeer herders\, shows how ethno-archaeology can provide an analytical background for the study of complex maneenvironment interrelations. Ethnographic observation confirmed in particular that the moisture content and structural soundness of the wood can be linked to hearth function: rotten conifers for instance\, are used for hide smoking by several groups living in the boreal forests of the Northern hemisphere. Charcoal samples from an Evenk hearth fed with rotten Larix cajanderi (Siberian larch) showed a high proportion of microscopic features diagnostic of fungal alterations. A series of systematic experimental combustions on Pinus sylvestris (scots Pine) confirmed the existence of a relationship between the frequency and the intensity of fungal alterations visible after the combustion and the initial state of the wood used in the hearth. The establishment of an alteration index allows now to take a new parameter\, the structural soundness of the wood\, into account when performing archaeological charcoal analyses.