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  • Geo-Sci-Info

    PDF of the announce

    PhD project in spatial statistics and stochastic geometry
    Spatio-temporal modeling and simulation of agricultural landslides, with an
    application to pest regulation

    Supervisors:
    Thomas Opitz, Julien Papaı̈x (BioSP, INRA Avignon, France); Édith Gabriel (Université
    d’Avignon, France)

    Motivation : agro-ecology
    In agroecosystems, species interactions between pests and auxiliaries are often strongly influenced
    by the proportion and spatial organization of semi-natural elements of agricultural landscapes.
    By conducting sensitivity analyses for biological control strategies of pests with respect to the
    composition and configuration of agricultural landscape elements, it will be possible to assess the
    effect of such interactions and to improve existing strategies of biological control.
    Research questions : stochastic geometry and sensitivity analysis
    This PhD project proposes to utilize methods from the field of stochastic geometry to model and
    simulate realistic agricultural landsapes through the development of models based on a small
    number of interpretable parameters characterizing the landscape structure. Mathematically, we will
    represent a study region as a tessellation of space, whose edges and cells are the spatial support for
    other elements such as hedgerows (i.e., linear segments) and crop types. A first goal of the thesis
    will be to propose realistic stochastic generator models for linear segments (hedges, ditches,
    grassy field margins...), and for the occupation of agricultural fields by various crops, while
    taking into account crop rotation. Our approaches will be based on censored Gaussian random
    fields and on marked Gibbs point processes.
    In the following step, in order to model the spatial distribution of species, we will couple partial
    differential equations (PDEs) in 2D for modeling the population dynamics within the fields with
    PDEs in 1D for the dynamics on linear elements. This approach allows studying the size and the
    spatial distribution of the species populations with respect to geometric characteristics of the land-
    scape such as the density and the connectivity of the hedgerow network. By simulating a multitude
    of scenarios, the sensitivity of population dynamics with respect to landscape structure
    will be studied. The framework of stochastic simulation makes it possible to quantitatively assess
    the part of uncertainty related to landscape.
    In the applied part of the thesis, the methodological results will be applied to the study region
    “Basse Vallée de la Durance” with the pest “codling moth” and its auxiliary species in apple
    orchards.
    Candidate profile : Statistician with interest in spatial modeling and ecology.
    Knowledge of fundamentals of spatial statistics and/or stochastic geometry and of the R program-
    ming language is appreciated.

    Contact
    The successful candidate will become part of the Biostatistics and Spatial Processes lab (BioSP)
    of INRA Avignon. The starting date is October 2018. This PhD project will be supervised by
    Julien Papaı̈x (julien.papaix [a] inra.fr), Thomas Opitz (thomas.opitz [a] inra.fr) and Edith Gabriel
    (edith.gabriel [a] univ-avignon.fr). To apply, please contact the supervisors by providing a detailed
    CV, a motivation letter and a recommendation letter from at least one former supervisor / professor.

    posted in Jobs offers - Call for projects read more
  • Geo-Sci-Info

    Prix de Thèse Systèmes Complexes 2018
    Untitled-design.jpg

    APPLICATION - OFFICIAL WEBSITE

    Dans le cadre de leur politique d’encouragement de l’enseignement et de la recherche, l’Institut des Systèmes Complexes de Paris Île-de-France (ISC-PIF) et le Réseau National des Systèmes Complexes (RNSC) organisent la deuxième édition du Prix de Thèse Systèmes Complexes en juin 2018.

    Ce prix de thèse a pour objectif de mettre à l’honneur la recherche dans le domaine des systèmes complexes et de distinguer les travaux de jeunes chercheurs·euses particulièrement prometteurs·euses.
    Le concours

    Ce concours est ouvert à toute personne, quelle que soit sa nationalité, ayant soutenu une thèse de doctorat dans une école doctorale française après le 1er janvier 2017.

    Les candidats·tes doivent remplir leur candidature en ligne à partir du 1e mars 2018 et avant le 30 avril 2018 à minuit : https://iscpif.fr/2018.03/candidatureptsc2018/

    Le jury

    Les dossiers seront sélectionnés au cours du mois de mai 2018 par un jury interdisciplinaire composé de personnalités reconnues dans le domaine des systèmes complexes. Les critères pris en compte par le jury pour sélectionner les lauréats·tes sont, notamment, l’importance et l’originalité des contributions dans le domaine des systèmes complexes, la qualité du manuscrit et l’interdisciplinarité éventuelle des travaux.

    Les finalistes seront invités·ées à venir présenter leurs travaux accompagnés·ées de leur(s) directeur·trices(s) de thèse lors de la cérémonie de remise des prix, en juin 2018.
    Eléments demandés

    Pour remplir le dossier de candidature, vous aurez besoin des éléments suivants :

    – le lien du site sur lequel est publié/stocké votre thèse. Votre thèse doit pouvoir être téléchargée en format pdf.
    – Un CV, 2 pages maximum, en anglais ou en français.
    – Une lettre de motivation : 2 pages maximum, en anglais ou en français. La lettre de motivation doit expliciter notamment le positionnement de la thèse vis-à-vis des principaux “objets” et “questions” définis par la feuille de route systèmes complexes, ainsi que les aspects interdisciplinaires éventuels de la thèse et les apports pour l’étude des systèmes complexes
    – Le rapport du jury de thèse et pré-rapports des rapporteurs.
    – Le résumé de la thèse. En deux pages maximum, accessible à des non spécialistes du sujet traité.
    Infos

    ISC-PIF, 113 rue Nationale
    Paris 13
    www.iscpif.fr
    contactus@iscpif.fr

    Cet événement Prix de Thèse Systèmes Complexes a été réalisé avec le soutien du DIM Problématiques transversales aux Systèmes Complexes.

    posted in PhD Thesis Prize on Complex Systems 2018 read more
  • Geo-Sci-Info

    Capture du 2018-04-09 10-48-12.png

    OFFICIAL WEBPAGE

    PROGRAM

    SCHEDULE

    Objectifs

    L'objectif de cette école est de donner aux étudiants et jeunes chercheurs de la sous-région Afrique centrale une formation de qualité en topologie algébrique et en géométrie, sur des sujets faisant l'objet de recherches actuelles dans les domaines de la recherche fondamentale en mathématiques, de la physique mathématique et de la robotique.
    Quoique portant sur des sujets avancés et actuels, les cours seront conçus pour être accessibles aux jeunes mathématiciens. Les cours de la première semaine viseront en particulier à donner des bases solides et systématiques sur les sujets concernés, de façon à les rendre accessibles à tous les participants, même sans connaissances préalables au-delà des bases classiques en algèbre, topologie ou géométrie.
    Le but principal de l'école est de les motiver au maximum et de leur donner les outils nécessaires pour leurs futures recherches. L'un des objectifs fondamentaux de cette école sera ainsi de donner aux participants de la sous-région des pistes de recherches d'actualité et intéressantes pouvant déboucher sur des résultats susceptibles de contribuer au développement de la sous-région.
    La majorité des cours qui y seront dispensés porteront sur la topologie algébrique. Plus précisément, on s'intéressera aux espaces de configurations qui apparaissent en mathématique, en physique classique, en statistique, en robotique, en biologie, en mécanique classique et en mécanique statistique. Seront principalement abordées les notions suivantes: Outils de Topologie algébrique, Espaces de configuration, Opérades algébriques, Opérade des petits disques, Géométrie de Poisson et Quantification géométrique. Ces notions seront présentées dans un langage « simple », en une série de 7 cours de 6 heures avec travaux dirigés, chacun par des spécialistes reconnus. Les après-midi seront essentiellement réservés aux travaux dirigés, aux exposés et échanges entre participants.

    ENSEIGNANTS

    Coordinateurs :

    Bitjong NDOMBOL (Université de Yaoundé 1)
    Frédéric PATRAS (CNRS - Université de Nice)

    Comité d'organisation local :

    Calvin TCHEKA (Cameroun)
    Charles AWONO ONANA (Cameroun)
    Joseph DONGOH (Cameroun)
    Bitjong NDOMBOL (Cameroun)
    Anne Marie TIAYA (Cameroun)

    Comité scientifique :

    Cristina COSTOYA (Espagne)
    Bitjong NDOMBOL (Cameroun)
    Michel NGUIFFO BOYOM (France)
    Eugène OKASSA (Congo)
    Frédéric PATRAS (France)

    L'école est soutenue par:

    CIMPA/ICPAM (Centre International de Mathématiques Pures et Appliquées/International Center for Pure and Applied Mathematics)

    IMU-CDC (Union mathématique internationale, Commission for developing countries)

    Université de Yaoundé 1

    posted in OUTILS DE TOPOLOGIE ALGEBRIQUE ET D'ALGEBRE HOMOLOGIQUE APPLICATIONS AUX ESPACES DE CONFIGURATION ET A L'ALGEBRE DE LIE-RINEHART read more
  • Geo-Sci-Info

    Bonjour,

    Le laboratoire de mathématiques et applications (LMA) de l'Université de Poitiers disposera d'au moins un poste d'ATER 25/26 l’an prochain.

    La période d'inscription s'étend du 20 mars 2018 (10h) au 10 avril 2018 (16h).

    La nouvelle procédure de recrutement est entièrement dématérialisée et s'effectuera en deux étapes :

    Les informations relatives à cette campagne sont en ligne sur le site Internet de l'Université.

    http://www.univ-poitiers.fr/universite/recrutement/recrutement-personnels-enseignants/

    Pour toute question administrative, les candidats pourront adresser leur demande à l'adresse suivante : recrutement-ater@univ-poitiers.fr

    Les contacts pour le poste au LMA sont Julien Michel pour le département de mathématiques, julien.michel [at] math.univ-poitiers.fr, et

    Alessandra Sarti, alessandra.sarti [at] math.univ-poitiers.fr pour le laboratoire.

    posted in Jobs offers - Call for projects read more
  • Geo-Sci-Info

    Geometric Analysis of Multimedia Data: Geometry as a Paradigm for Machine Learning and Data Mining in Multimedia Systems

    Call for Papers
    OFFICIAL WEBSITE - SUBMISSION

    Nowadays, multimedia systems require processing, representation, storage, and transmission of large amount of multidimensional digital information, possibly sampled from nonlinear manifolds. On top of that, multimedia applications involve the computer-controlled integration of text, graphics, images/video, and audio represented in digital form with the goal of letting the user navigate, interact, create, and communicate insights inferred from sources of raw information. The complex tasks involved in such processes lead to a strong demand for multimedia data analysis and information extraction/retrieval.

    In this context, manifold learning techniques have been applied to embed nonlinear data in lower dimensional spaces for subsequent analysis. The result allows a geometric interpretation of information with relevant consequences regarding data topology, sampling theory, similarity computation, pattern recognition, and, more recently, deep learning. Yet in the direction of using geometry as a paradigm for machine learning and data mining, we shall include the geometric data analysis and the development of tools for studying geometric features of data through topological data analysis.

    The main goal of this special issue is to explore geometric concepts for analysis, data representation and integration, information extraction, and retrieval from multimedia systems. We encourage submissions that combine geometric concepts, data representation techniques, and machine and statistical learning methods, for extracting meaningful information from high-dimensional data spaces. Review articles that describe the current state of the art in geometric analysis of multimedia data are welcome as well.

    Potential topics include but are not limited to the following:

    • Geometric analysis of deep hierarchical structures in multimedia
    • Generative models and manifolds for multimodal information retrieval
    • Data models integrating geometry, multivariate statistics, and sampling theory
    • Topological data analysis for studying geometric features of data
    • Multimedia data mining and analysis based on geometry and topology
    • Multimedia data analysis based on manifold learning
    • Geometric based approaches for metric learning
    • Geometry as a paradigm to discuss deep learning algorithms in multimedia applications

    Authors can submit their manuscripts through the Manuscript Tracking System at https://mts.hindawi.com/submit/journals/am/gamdl/.
    Submission Deadline Friday, 10 August 2018
    Publication Date December 2018

    Papers are published upon acceptance, regardless of the Special Issue publication date.

    Lead Guest Editor
    Gilson A. Giraldi, National Laboratory for Scientific Computing, Petrópolis, Brazil

    Guest Editors

    posted in Geometric Analysis of Multimedia Data: Geometry as a Paradigm for Machine Learning and Data Mining in Multimedia Systems read more
  • Geo-Sci-Info

    Special Issue MDPI "Joseph Fourier 250th Birthday: Modern Fourier Analysis and Fourier Heat Equation in Information Sciences for the XXIst century"

    SUBMISSION-OFFICIAL WEBSITE

    Special Issue Editors
    Guest Editor
    Prof. Dr. Frédéric Barbaresco
    Department of Advanced Radar Concepts, Thales Air Systems, Voie Pierre-Gilles de Gennes F91470 Limours, France
    Interests: Geometric Theory of Heat

    Guest Editor
    Prof. Jean-Pierre Gazeau
    Université Paris-Diderot
    Interests: Harmonic Analysis
    Special Issue Information

    Dear Colleagues,

    For the 250th birthday of Joseph Fourier, born in 1768 in Auxerre, France, this MDPI Special Issue will explore modern topics related to Fourier Analysis and Heat Equation.

    Modern developments of Fourier analysis during the 20th century have explored generalizations of Fourier and Fourier-Plancherel formula for non-commutative harmonic analysis, applied to locally-compact, non-Abelian groups. In parallel, the theory of coherent states and wavelets has been generalized over Lie groups. One should add the developments, over the last 30 years, of the applications of harmonic analysis to the description of the fascinating world of aperiodic structures in condensed matter physics. The notions of model sets, introduced by Y. Meyer, and of almost periodic functions, have revealed themselves to be extremely fruitful in this domain of natural sciences.

    The name of Joseph Fourier is also inseparable from the study of the mathematics of heat. Modern research on heat equations explores the extension of the classical diffusion equation on Riemannian, sub-Riemannian manifolds, and Lie groups. In parallel, in Geometric Mechanics, Jean-Marie Souriau interpreted the temperature vector of Planck as a space-time vector, obtaining, in this way, a phenomenological model of continuous media, which presents some interesting properties.

    A last comment concerns the fundamental contributions of Fourier analysis to quantum physics: Quantum mechanics and quantum field theory.

    The content of this Special Issue will highlight papers exploring non-commutative Fourier harmonic analysis, spectral properties of aperiodic order, the hypoelliptic heat equation, and the relativistic heat equation in the context of Information Theory and Geometric Science of Information.

    Prof. Dr. Frédéric Barbaresco
    Prof. Jean-Pierre Gazeau
    Guest Editors

    Manuscript Submission Information

    Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

    Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Entropy is an international peer-reviewed open access monthly journal published by MDPI.

    Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1500 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

    posted in Preprints - Books - Archivs - Journal special edition (Entropy...) read more
  • Geo-Sci-Info

    Program

    All the abstracts of the sessions are now available online in the Entropy 2018 website

    program_entropy_2018.png

    DOWNLOAD PROGRAM
    Session Start:
    Monday 14 May 2018: 08:00 - 12:30 / 14:00 - 18:00
    Tuesday 15 May 2018: 08:30 - 12:30 / 14:00 - 18:00 / Conference Dinner: 20:30
    Wednesday 16 May 2018: 08:30 - 12:30 / 14:00 - 18:00

    posted in Entropy 2018: From Physics to Information Sciences and Geometry read more
  • Geo-Sci-Info

    A PhD position is available in the computational geometry group at INRIA Nancy ( http://gamble.loria.fr/ ).
    The thesis will be supervised by Olivier Devillers ( https://members.loria.fr/Olivier.Devillers/ ).

    The thesis will be focused on probabilistic analysis and simulations of geometric structures
    ( https://members.loria.fr/Olivier.Devillers/these-aspag.pdf ) and is funded by the
    ANR project Aspag ( https://members.loria.fr/Olivier.Devillers/aspag/ )

    Candidates should have a degree in computer science or mathematics.
    Some knowledge of the following areas is welcome:

    • probability theory
    • analysis and design of algorithms
    • computational geometry
    • C++ programming.

    The thesis is expected to last three years to start fall 2018, but there is some flexibility.

    To apply or for any question,
    please contact Olivier Devillers.

    General information about PhD at INRIA:
    https://www.inria.fr/en/institute/recruitment/offers/phd/faq
    Salary is:
    First- and second-year PhD student: €1 982 (gross) per month
    Third-year PhD student: €2 085 (gross) per month

    posted in Jobs offers - Call for projects read more
  • Geo-Sci-Info

    Sujet de la thèse:

    "Caractérisation et modélisation de l’anisotropie espace-temps pour les champs spatio-temporels. Applications aux variables du climat."

    La thèse sera co-encadrée par Denis Allard (BioSP) et Céline Lacaux (Laboratoire de Mathématiques d'Avignon".

    Il faut faire acte de candidature avant le 23 mai 2018. La décision sera rendue le 1 juin 2018. Pour plus de détail, lire le pdf: APPLICATION.PDF

    posted in Jobs offers - Call for projects read more
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