Revistas

ARIMA

[Revue africaine de recherche en informatique et mathématiques appliquées]

ARIMA

Revue africaine de recherche en informatique et mathématiques appliquées

A ARIMA nasceu em 2002 de uma colaboração científica Norte/Sul realizada na base das atividades do Colóquio africano para a investigação em informática e matemática aplicada (CARI). A revista publica gradualmente, em francês e em inglês, os resultados provenientes destas colaborações.

Diretor de publicação: Maurice Tchuenté
Redators responsáveis: Nabil Gmati, Mathieu Roche, Maurice Tchuenté e Bruce Watson
Tipo de suporte: digital
Periodicidade: gradual
Ano de criação: 2002
Data de disponibilização online na Episciences: 2016
eISSN: 1638-5713
Disciplinas: informática e matemática aplicada
Idiomas da publicação: inglês, francês

Processo de avaliação: estudo cego
CC BY 4.0 licence

Editor: African Society in Digital Science
- Endereço postal: Department of Mathematics and Computer Science, Faculty of Science, University of Dschang, P.O. Box 96 Dschang
- País: Camarões
Contacto: arima AT episciences.org

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Les modèles LSAWfP non récursifs sont des workflows structurés

Les langages de workflow occupent une place importante dans la discipline du Business Process Management (BPM) : ils sont utilisés pour modéliser les processus opérationnels afin de faciliter leur gestion automatique à l'aide de systèmes BPM. Il existe de nombreux langages de workflow qui traitent de divers aspects (expressivité, analyse formelle, etc.). Au cours de la dernière décennie, certains langages de workflow basés sur des grammaires algébriques (ayant alors une sémantique formelle) et offrant de nouvelles perspectives à la modélisation des processus ont vu le jour : LSAWfP (a Language for the Specification of Administrative Workflow Processes) est l'un d'entre eux. LSAWfP présente de nombreux avantages par rapport aux langages existants, mais c'est son expressivité (qui a été très peu abordée dans les travaux antérieurs) qui est étudiée dans le présent document. En effet, les travaux présentés dans ce document visent à démontrer que tout modèle LSAWfP non récursif est un workflow structuré. Sachant que la majorité des systèmes BPM commerciaux ne gèrent que des workflows structurés, le résultat de cette étude montre que, bien que LSAWfP soit encore très théorique, il est un langage au potentiel économique certain.

Zekeng Ndadji, Milliam Maxime

05 juillet 2023

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Combiner Scrum et l'Architecture Dirigée par les modèles pour le développement d'un système de surveillance épidémiologique

Les systèmes de surveillance épidémiologiques évoluent avec le temps, en tenant compte du contexte et des données collectées. Ainsi, les logiciels utilisés doivent aussi évoluer pour pouvoir répondre aux besoins. Cependant, de nouvelles exigences des clients peuvent prendre du temps pour être implémentées, coûter plus cher (dans le cas où il faut recruter des programmeurs) et causer des problèmes comme le problème de régression logiciel. Ainsi, le logiciel peut devenir défaillant. Ceci est dû à un mauvais transfert des exigences des clients vers la mise en œuvre. Ce problème peut être évité si le système est développé en utilisant un framework et une architecture permettant le développement/la mise à jour rapide des logiciels de surveillance. La recherche empirique d'une part montre que l'Ingénierie Dirigée par les Modèles (par exemple, Architecture Dirigée par les Modèles ou Model-Driven Architecture - MDA) est plus efficace que les approches basées sur le code pour le développement et la maintenance de certains logiciels. D'autre part, les processus agiles tels que Scrum sont plus efficaces que les processus structurés lorsque les exigences sont sujettes aux changements fréquents. Il a été démontré que le développement des logiciels de santé comme les logiciels de surveillance épidémiologique en utilisant les processus structurés ou les approches de développement centrées sur le code n'est pas évident car ces logiciels sont sujettes aux changements fréquents. Dans ce travail, nous étudions la combinaison de Scrum avec MDA pour le développement du système de surveillance épidémiologique de la tuberculose. A son terme, nous avons trouvé la combinaison de Scrum et MDA simple, très utile lorsque l'outil sous-jacent peut générer tout le code source. La combinaison de Scrum et MDA a eu des effets positifs sur la productivité et la satisfaction des programmeurs et des clients. En plus, nous avons constaté que pour impliquer les non-informaticiens dans le développement ou la mise à jour, l'interface de modélisation doit être aussi simple que possible.

Azanzi, Jiomekong

04 juillet 2023

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CM

[Communications in Mathematics]

CM

Communications in Mathematics

Existente desde 2009, a Communications in Mathematics é a continuação da revista Acta Mathematica et Informatica Universitatis Ostraviensis, fundada em 1993, que se tornou a Acta Mathematica Universitatis Ostraviensis em 2003. A Communications in Mathematics publica em inglês artigos de investigação e de estudo em todas as áreas da matemática pura e aplicada, da física matemática e da informática.

Diretor de publicação: Jan Lata
Redator responsável: Ivan Kaygorodov
Tipo de suporte: digital
Periodicidade: anual
Ano de criação: 2009
Data de disponibilização online na Episciences: 2021
eISSN: 2336-1298
Disciplinas: matemática
Idiomas da publicação: inglês

Processo de avaliação: estudo cego
CC BY-SA 4.0 licence

Editor: University of Ostrava
- Endereço postal: Dvořákova 7, 701 03 Ostrava
- País: República Checa
Contacto: cm AT episciences.org

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Relaxation in one-dimensional tropical sandpile

A relaxation in the tropical sandpile model is a process of deforming a tropical hypersurface towards a finite collection of points. We show that, in the one-dimensional case, a relaxation terminates after a finite number of steps. We present experimental evidence suggesting that the number of such steps obeys a power law.

Shkolnikov, Mikhail

26 septembre 2023

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Solvable Leibniz superalgebras whose nilradical has the characteristic sequence $(n-1, 1 \mid m)$ and nilindex $n+m$

Leibniz superalgebras with nilindex $n + m$ and characteristic sequence $(n-1, 1 \ | \ m)$ divided into four parametric classes that contain a set of non-isomorphic superalgebras. In this paper, we give a complete classification of solvable Leibniz superalgebras whose nilradical is a nilpotent Leibniz superalgebra with nilindex $n + m$ and characteristic sequence $(n-1, 1 \ | \ m)$. We obtain a condition for the value of parameters of the classes of such nilpotent superalgebras for which they have a solvable extension. Moreover, the classification of solvable Leibniz superalgebras whose nilradical is a Lie superalgebra with the maximal nilindex is given.

Kh., Khudoyberdiyev A.

20 septembre 2023

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CST

[Les Cahiers Scientifiques du Transport]

CST

Les Cahiers Scientifiques du Transport

Criadas em 1979, as Cahiers Scientifiques du Transport publicam semestralmente, no âmbito de números variáveis ou temáticas, artigos sobre o setor dos transportes, da mobilidade e da logística. Apoiada pela Associação Francesa dos Institutos de Transporte e Logística (AFITL), a revista destaca a diversidade disciplinar das contribuições.

Diretor de publicação: Antoine Frémont
Redator responsável: Laurent Carnis
Tipo de suporte: digital
Periodicidade: semestral
Ano de criação: 1979
Data de disponibilização online na Episciences: 2022
eISSN: 1150-8809
Disciplinas: ordenamento, engenharia, ciências da gestão, ciência política, urbanismo
Idiomas da publicação: francês

Processo de avaliação: estudo cego
CC BY 4.0 licence

Editor: Association française des instituts de transport et de logistique (AFITL)
- Endereço postal: MSH Lyon Saint-Étienne, 14 avenue Berthelot, 69363 Lyon Cedex 07
- País: França
Contacto: cst AT episciences.org

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Transport maritime de marchandises : la construction d’un système juridique complexe dépassant le mythe de l’uniformité

Dans la mesure où le transport maritime de marchandises implique divers types d'opérateurs commerciaux internationaux, l'uniformité de la règlementation applicable semble être le meilleur moyen de satisfaire aux exigences de sécurité de ces différents acteurs. Il est donc nécessaire de se demander si cet idéal d’uniformisation du droit du transport maritime de marchandises tenté par les États est atteignable voire même souhaitable ou s’il ne faut pas constater en la matière que les opérateurs du transport international maritime de marchandises, loin d’être pénalisés par le conflit de normes applicables, n’y trouvent pas la souplesse nécessaire pour adapter le cadre juridique à leur propre contrat de transport ?

Branellec, Gurvan

08 septembre 2023

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Communication en matière de sécurité routière et comportement des usagers de la route : le rôle du risque perçu

L’objectif de cet article est de montrer dans quelle mesure la communication en sécurité routière influe sur le comportement des usagers de la route. Pour atteindre cet objectif, nous avons collecté les données à partir d’une enquête par questionnaire sur une période de cinq mois, de février à juin 2019. Ces données ont fait l’objet d’une analyse factorielle exploratoire et d’une analyse factorielle confirmatoire ; des équations structurelles ont également été mobilisées pour tester les hypothèses que nous nous sommes fixées. Les résultats montrent que la communication a un effet direct sur le comportement des usagers de la route ; elle influe sur la perception du risque corporel, mais ce dernier n’a pas d’effet sur le comportement ; la communication n’influe pas sur la perception du risque matériel qui pour sa part a un effet sur le comportement. Les résultats montrent également que la force du lien entre ces variables dépend de la ville de résidence de l’usager, de sa nature et de son âge.

Nkene Ndeme, Richard

23 juin 2023

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DMTCS

[Discrete Mathematics & Theoretical Computer Science]

DMTCS

Discrete Mathematics & Theoretical Computer Science

A Discrete Mathematics & Theoretical Computer Science (DMTCS) é uma revista especializada criada em 1997. Apoiada pela associação DMTCS, publica gradualmente artigos de investigação em inglês, nas áreas da matemática discreta e da informática teórica, em especial no cruzamento destas duas disciplinas.

Diretor de publicação: Jens Gustedt
Redators e redatora responsáveis: Christoph Haase, Dieter Rautenbach, Sergi Elizalde e Hadas Shachnai
Tipo de suporte: digital
Periodicidade: gradual
Ano de criação
Data de disponibilização online na Episciences
eISSN: 1365-8050
Disciplinas: matemática, informática
Idiomas da publicação: inglês

Processo de avaliação: estudo cego
CC BY 4.0 licence

Editor: Association DMTCS
- Endereço postal: c/o Jens Gustedt, 67A avenue Jean-Jaurès, 67100 Strasbourg
- País: França
Contacto: dmtcs AT episciences.org

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Maker-Breaker domination game on trees when Staller wins

In the Maker-Breaker domination game played on a graph $G$, Dominator's goal is to select a dominating set and Staller's goal is to claim a closed neighborhood of some vertex. We study the cases when Staller can win the game. If Dominator (resp., Staller) starts the game, then $\gamma_{\rm SMB}(G)$ (resp., $\gamma_{\rm SMB}'(G)$) denotes the minimum number of moves Staller needs to win. For every positive integer $k$, trees $T$ with $\gamma_{\rm SMB}'(T)=k$ are characterized and a general upper bound on $\gamma_{\rm SMB}'$ is proved. Let $S = S(n_1,\dots, n_\ell)$ be the subdivided star obtained from the star with $\ell$ edges by subdividing its edges $n_1-1, \ldots, n_\ell-1$ times, respectively. Then $\gamma_{\rm SMB}'(S)$ is determined in all the cases except when $\ell\ge 4$ and each $n_i$ is even. The simplest formula is obtained when there are at least two odd $n_i$s. If $n_1$ and $n_2$ are the two smallest such numbers, then $\gamma_{\rm SMB}'(S(n_1,\dots, n_\ell))=\lceil \log_2(n_1+n_2+1)\rceil$. For caterpillars, exact formulas for $\gamma_{\rm SMB}$ and for $\gamma_{\rm SMB}'$ are established.

Bujtás, Csilla

06 septembre 2023

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Antisquares and Critical Exponents

The (bitwise) complement $\overline{x}$ of a binary word $x$ is obtained by changing each $0$ in $x$ to $1$ and vice versa. An $\textit{antisquare}$ is a nonempty word of the form $x\, \overline{x}$. In this paper, we study infinite binary words that do not contain arbitrarily large antisquares. For example, we show that the repetition threshold for the language of infinite binary words containing exactly two distinct antisquares is $(5+\sqrt{5})/2$. We also study repetition thresholds for related classes, where "two" in the previous sentence is replaced by a larger number. We say a binary word is $\textit{good}$ if the only antisquares it contains are $01$ and $10$. We characterize the minimal antisquares, that is, those words that are antisquares but all proper factors are good. We determine the growth rate of the number of good words of length $n$ and determine the repetition threshold between polynomial and exponential growth for the number of good words.

Baranwal, Aseem

06 septembre 2023

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Ambiente

EID

[Environnement, Ingénierie & Développement]

EID

Environnement, Ingénierie & Développement

Lançada em 2021, a Environnement, Ingénierie & Développement (EID) é uma evolução da revista Déchets Sciences & Techniques criada 1996. Apoiada pelo INSA de Lyon, a EID acolhe artigos de investigação e feedback, em francês ou em inglês, nos setores do ambiente industrial e urbano, da economia circular e da ecologia industrial territorial.

Diretor de publicação: Frédéric Fotiadu
Redators responsáveis: Rémy Gourdon e Mathieu Gautier
Tipo de suporte: digital
Periodicidade: três vezes por ano
Ano de criação: 1996
Data de disponibilização online na Episciences: 2021
eISSN: 2778-844X
Disciplinas: engenharia ambiental
Idiomas da publicação: inglês, francês

Processo de avaliação: estudo cego
CC BY 4.0 licence

Editor: INSA de Lyon
- Endereço postal: 20 avenue Albert Einstein, 69621 Villeurbanne cedex
- País: França
Contacto: eid AT episciences.org

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Méthode de quantification des flux des mines urbaines : cas des briques en terre cuite en Ile de France

Le secteur du bâtiment est un grand consommateur de ressources et producteur de déchets. Dans un contexte d’épuisement des ressources, on peut imaginer qu’il devra mettre en place des stratégies pour devenir davantage circulaire. Une solution possible est d’avoir recours aux mines urbaines, c’est-à-dire, de voir les bâtiments existants comme un gisement de ressources disponibles pour les futurs constructions ou rénovations du parc immobilier lors de leur déconstruction ou rénovation. Cet article propose une méthode pour mettre en relation des quantités de matériaux issus de la déconstruction et de la rénovation avec les besoins du secteur du bâtiment neuf ou de la rénovation. Après leur extraction des mines urbaines, les éléments de construction peuvent convenir à divers usages secondaires. Les usages possibles en sortie des filières de réemploi, réutilisation et de recyclage sont identifiés et les quantités de matériaux répondant à chacun de ceux-ci sont déterminés avec des unités adéquates (m2, kg…). Ces unités facilitent la comparaison entre les matériaux valorisés et la demande. La méthode se veut prospective en considérant comme hypothèse que l’économie circulaire est pleinement développée et que l’accent n’est mis que sur la faisabilité technique des modes de valorisation. Afin d’illustrer la méthode, le cas des briques en terre cuite en Ile-de-France est développé. Durant l’année 2020, 153 kt de briques en terre cuite ont été produites par la démolition de bâtiments sur ce territoire, permettant d’obtenir au maximum (et sous réserve d’une bonne qualité de tri et des matériaux déconstruits), une surface de plus de 21 000 m2 de parois en briques de maçonnerie, par exemple, et 9,2 kt de granulats destinés à la fabrication de béton.

Clavier, Sarah

28 mars 2023

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Variabilité spatiale de la qualité des eaux agricoles d’un bassin versant de deux arrondissements d’Antananarivo (Madagascar)

Contexte : L’analyse spatiale de la qualité des eaux a été réalisée dans la zone agricole située dans un bas-fond d’un bassin versant de Tana 2 et Tana 4 – Madagascar. Objectif : Elle vise à déterminer la nature des eaux agricoles et la variabilité spatiale de leur alcalinité, leur salinité et leur teneur en matière organique. Méthodes : La zone agricole a été subdivisée en trois parcelles P1, P2 et P3 selon le type de sol. Des échantillons d’eaux prélevés sur les 43 points géo référencés de cette zone ont été soumis aux mesures de pH, Conductivité Électrique (CE) et Demande Chimique en Oxygène (DCO). La distribution spatiale de ces paramètres a été établie par interpolation des valeurs de ces indicateurs en utilisant v.kriging du logiciel GRASS GIS. Résultats et discussion : Les eaux des parcelles P2 présentent une forte alcalinité. Celles de la parcelle P3 sont très riches en sels dissous et en matières organiques. La distribution spatiale de l’alcalinité et la salinité suit un modèle linéaire, tandis qu’un modèle exponentiel caractérise la répartition de la matière organique.

Rakoto, Nelly Ghislaine

22 mars 2023

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ENTICS

[Electronic Notes in Theoretical Informatics and Computer Science]

ENTICS

Electronic Notes in Theoretical Informatics and Computer Science

A ENTICS, Electronic Notes in Theoretical Informatics and Computer Science, criada em 2022, publica, gradualmente em inglês, atas de conferências e de workshops de informática teórica.

Diretor de publicação: Bruno Sportisse
Redator responsável: Michael Mislove
Tipo de suporte: digital
Periodicidade: gradual
Ano de criação: 2022
Data de disponibilização online na Episciences: 2023
eISSN: 2969-2431
Disciplinas: informática teórica
Idiomas da publicação: inglês
Processo de avaliação: estudo cego
Licence CC BY 4.0
Editor: Inria
- Endereço postal: Domaine de Voluceau Rocquencourt – B.P. 105 78153 Le Chesnay Cedex
- País: França
Contacto: entics AT episciences.org

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The sheaf representation of residuated lattices

The residuated lattices form one of the most important algebras of fuzzy logics and have been heavily studied by people from various different points of view. Sheaf presentations provide a topological approach to many algebraic structures. In this paper, we study the topological properties of prime spectrum of residuated lattices, and then construct a sheaf space to obtain a sheaf representation for each residuated lattice.

Zhang, Huarong

21 mars 2023

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A Hofmann-Mislove theorem for $c$-well-filtered spaces

The Hofmann-Mislove theorem states that in a sober space, the nonempty Scott open filters of its open set lattice correspond bijectively to its compacts saturated sets. In this paper, the concept of $c$-well-filtered spaces is introduced. We show that a retract of a $c$-well-filtered space is $c$-well-filtered and a locally Lindel\"{o}f and $c$-well-filtered $P$-space is countably sober. In particular, we obtain a Hofmann-Mislove theorem for $c$-well-filtered spaces.

Zhang, Liping

21 mars 2023

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EpiDEMES

[Épijournal de Didactique et Epistémologie des Mathématiques pour l’Enseignement Supérieur]

EpiDEMES

Épijournal de Didactique et Epistémologie des Mathématiques pour l’Enseignement Supérieur

A Epijournal de Didactique et Epistémologie des Mathématiques pour l’Enseignement Supérieur (EpiDEMES) é uma revista especializada fundada em 2019 que publica artigos em francês ou em inglês. A EpiDEMES tem como objetivo a criação de uma base documental para a formação inicial e contínua dos docentes do ensino superior. As áreas abrangidas são a didática e a epistemologia da matemática (classificação AMS 97-XX Mathematics Education) tendo como objetivo a matemática do ensino superior e os fenómenos associados ao seu ensino-aprendizagem.

Diretor de publicação: Nicolas Grenier-Boley
Redators responsáveis: Nicolas Grenier-Boley e Hussein Sabra
Tipo de suporte: digital
Periodicidade: semestral
Ano de criação: 2019
Data de disponibilização online na Episciences: 2019
eISSN: 2970-166X
Disciplinas: matemática, didática da matemática
Idiomas da publicação: inglês, francês

Processo de avaliação: estudo cego
CC BY-SA 4.0 licence

País: França
Contacto: epidemes AT episciences.org

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Quelle est la place des exemples dans l'enseignement de l'algèbre abstraite ?

Enseigner l'algèbre abstraite, vue comme l'étude des structures et des propriétés des structures, à un niveau universitaire apparaît être un challenge pour les corps étudiant et professoral. Les professeurs de notre étude décrivent ce passage à travers l'abstraction pour le corps étudiant comme un « jeu de massacre », un « mur infranchissable » ou encore « un saut à travers l'abstraction ». Dans cet article, en appui sur une étude de cas (Candy, 2020) nous allons étudier les choix de professeurs enseignant l'algèbre abstraite à l'université. Ces professeurs ont été choisis car ils enseignent l'algèbre abstraite à l'université en France, de plus ils nous ont donné accès à leur corpus de cours et ont accepté d'être interviewés. Dans cet article, nous choisirons d'étudier en particulier l'enseignement du concept d'idéal. Une analyse épistémologique nous permettra de mettre en évidence son rôle central dans la construction de l'algèbre abstraite. Puis, en utilisant la théorie anthropologique du didactique (Chevallard, 1998), nous chercherons à préciser la place des exemples et exercices dans la praxis du corps étudiant.

Stalder, Julie

29 juin 2023

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Conceptions des étudiants des classes préparatoires en Tunisie sur l'intégrale de Riemann

The integral is one of the most important topics in Calculus that is difficult to be understood by many students. When solving definite integral application problems, previous research emphasizes that students found the antiderivative procedure more useful and easier than the approximation process or area (Akrouti, 2020). This paper focuses on students' conceptions of the definite integral in the first year of preparatory class. Data were collected from students' written responses to questions that relate to their views of integration. The analysis shows that the majority of students choose the algebraic process to evaluate the proposed integrals. Participants were first-semester calculus students enrolled in a public university.

Akrouti, Inen

06 juin 2023

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Epiga

[Épijournal de Géométrie Algébrique]

Epiga

Épijournal de Géométrie Algébrique

A Epijournal de Géométrie Algébrique (Epiga) é uma revista de matemática especializada criada em 2016. Apoiada pela Associação Épiga, publica anualmente artigos em francês ou em inglês. As áreas abrangidas são a geometria algébrica no sentido mais amplo, incluindo a geometria complexa e aritmética, a teoria dos grupos algébricos e das representações.

Diretor de publicação: Pierre-Emmanuel Chaput
Editor coordenador: Stéphane Druel
Tipo de suporte: digital
Periodicidade: anual
Ano de criação: 2016
Data de disponibilização online na Episciences: 2016
eISSN: 2491-6765
Disciplinas: matemática, geometria algébrica
Idiomas da publicação: inglês, francês

Processo de avaliação: estudo cego
CC BY-SA 4.0 licence

Editor: Association Épiga
- Endereço postal: Institut Elie Cartan de Lorraine, Université de Lorraine, BP 70239, 54506 Vandœuvre-lès-Nancy Cedex
- País: França
Contacto: epiga AT episciences.org

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On a decomposition of $p$-adic Coxeter orbits

We analyze the geometry of some $p$-adic Deligne--Lusztig spaces $X_w(b)$ introduced in [Iva21] attached to an unramified reductive group ${\bf G}$ over a non-archimedean local field. We prove that when ${\bf G}$ is classical, $b$ basic and $w$ Coxeter, $X_w(b)$ decomposes as a disjoint union of translates of a certain integral $p$-adic Deligne--Lusztig space. Along the way we extend some observations of DeBacker and Reeder on rational conjugacy classes of unramified tori to the case of extended pure inner forms, and prove a loop version of Frobenius-twisted Steinberg's cross section.

Ivanov, Alexander B.

27 septembre 2023

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K-stability for varieties with a big anticanonical class

We extend the algebraic K-stability theory to projective klt pairs with a big anticanonical class. While in general such a pair could behave pathologically, it is observed in this note that K-semistability condition will force them to have a klt anticanonical model, whose stability property is the same as the original pair.

Xu, Chenyang

01 septembre 2023

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FI

[Fundamenta Informaticae]

FI

Fundamenta Informaticae

Fundada em 1977, a Fundamenta Informaticae é uma revista científica especializada que abrange todas as áreas da informática, com um foco especial nos fundamentos teóricos. A revista é publicada na série IV das Annales Societatis Mathematicae Polonae, pela Sociedade matemática polaca.

Diretor de publicação: Prof. Jacek Miękisz
Redator responsável: Damian Niwiński
Tipo de suporte: papel e digital
Periodicidade: 5 a 6 volumes por ano
Ano de criação: 1977
Data de disponibilização online na Episciences: 2020
eISSN: 1875-8681
Disciplinas: informática
Idiomas da publicação: inglês

Processo de avaliação: estudo cego
CC BY 4.0 licence

Editor: Polish Mathematical Society
- Endereço postal: ul. Śniadeckich 8, 00-656 Warszawa
- País: Polónia
Contacto: fi AT episciences.org

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Diffuse and Localized Functional Dysconnectivity in Schizophrenia: a Bootstrapped Top-Down Approach

Schizophrenia (SZ) is a brain disorder leading to detached mind's normally integrated processes. Hence, the exploration of the symptoms in relation to functional connectivity (FC) had great relevance in the field. FC can be investigated on different levels, going from global features to single edges between regions, revealing diffuse and localized dysconnection patterns. In this context, SZ is characterized by a diverse global integration with reduced connectivity in specific areas of the Default Mode Network (DMN). However, the assessment of FC presents various sources of uncertainty. This study proposes a multi-level approach for more robust group-comparison. FC between 74 AAL brain areas of 15 healthy controls (HC) and 12 SZ subjects were used. Multi-level analyses and graph topological indexes evaluation were carried out by the previously published SPIDER-NET tool. Robustness was augmented by bootstrapped (BOOT) data and the stability was evaluated by removing one (RST1) or two subjects (RST2). The DMN subgraph was evaluated, toegether with overall local indexes and connection weights to enhance common activations/deactivations. At a global level, expected trends were found. The robustness assessment tests highlighted more stable results for BOOT compared to the direct data testing. Conversely, significant results were found in the analysis at lower levels. The DMN highlighted reduced connectivity and strength as well as increased deactivation in the SZ group. At local level, 13 areas were found to be significantly different ($p<0.05$), highlighting a greater divergence in the frontal lobe. These results were confirmed analyzing the negative edges, suggesting inverted connectivity between prefronto-temporal areas. In conclusion, multi-level analysis supported by BOOT is highly recommended, especially when diffuse and localized dysconnections must be investigated in limited samples.

Coluzzi, Davide

21 septembre 2023

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Error Correction for Discrete Tomography

Discrete tomography focuses on the reconstruction of functions $f: A \to \mathbb{R}$ from their line sums in a finite number $d$ of directions, where $A$ is a finite subset of $\mathbb{Z}^2$. Consequently, the techniques of discrete tomography often find application in areas where only a small number of projections are available. In 1978 M.B. Katz gave a necessary and sufficient condition for the uniqueness of the solution. Since then, several reconstruction methods have been introduced. Recently Pagani and Tijdeman developed a fast method to reconstruct $f$ if it is uniquely determined. Subsequently Ceko, Pagani and Tijdeman extended the method to the reconstruction of a function with the same line sums of $f$ in the general case. Up to here we assumed that the line sums are exact. In this paper we investigate the case where a small number of line sums are incorrect as may happen when discrete tomography is applied for data storage or transmission. We show how less than $d/2$ errors can be corrected and that this bound is the best possible.

Ceko, M.

21 septembre 2023

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HRJ

[Hardy-Ramanujan Journal]

HRJ

Hardy-Ramanujan Journal

Criada em 1978, a Hardy-Ramanujan Journal é uma revista especializada. Editada pela Hardy-Ramanujan Society, publica anualmente artigos em inglês de matemática fundamental, mais precisamente, de teoria dos números.

Diretor de publicação: C.S. Aravinda
Redators responsáveis: C.S. Aravinda, Atul Dixit e Kotyada Srinivas
Tipo de suporte: digital
Periodicidade: anual
Ano de criação: 1978
Data de disponibilização online na Episciences: 2014
eISSN: 2804-7370
Disciplinas: matemática, teoria dos números
Idiomas da publicação: inglês

Processo de avaliação: estudo cego
CC BY 4.0 licence

Editor: Hardy-Ramanujan Society
- Endereço postal: Bhavana Trust, No.24, `Athreya’ 21st Main, 2nd Block, BSK I Stage BANGALORE — 560 050
- País: Índia
Contacto: hrj AT episciences.org

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Últimos artigos

A modular relation involving a generalized digamma function and asymptotics of some integrals containing Ξ(t)

A modular relation of the form $F(\alpha, w)=F(\beta, iw)$, where $i=\sqrt{-1}$ and $\alpha\beta=1$, is obtained. It involves the generalized digamma function $\psi_w(a)$ which was recently studied by the authors in their work on developing the theory of the generalized Hurwitz zeta function $\zeta_w(s, a)$. The limiting case $w\to0$ of this modular relation is a famous result of Ramanujan on page $220$ of the Lost Notebook. We also obtain asymptotic estimate of a general integral involving the Riemann function $\Xi(t)$ as $\alpha\to\infty$. Not only does it give the asymptotic estimate of the integral occurring in our modular relation as a corollary but also some known results.

Dixit, Atul

06 février 2023

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A Generalization of Iseki's Formula and The Jacobi Theta Function

In this paper we give a generalization of Iseki's formula and use it to prove the transformation law of $\theta_1(z,\tau)$.

Me'Meh, Maher

06 février 2023

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JDMDH

[Journal of Data Mining and Digital Humanities]

JDMDH

Journal of Data Mining and Digital Humanities

Criada em 2014, a Journal of Data Mining and Digital Humanities (JDMDH) situa-se na interseção da extração de dados e das humanidades digitais. Os artigos publicados, em inglês ou em francês, referem-se tanto à prospeção e à gestão dos conhecimentos (análise das redes, extração de informação, web semântica, análise das preferências, aprendizagem automática) como nas ciências humanas e sociais (históricas, políticas, linguísticas, sociológicas, geográficas, da comunicação e do arquivo) na era do digital.

Diretor de publicação: Bruno Sportisse
Redators responsáveis: Richi Nayak, Laurent Romary e Nicolas Turenne
Tipo de suporte: digital
Periodicidade: gradual
Ano de criação: 2014
Data de disponibilização online na Episciences: 2014
eISSN: 2416-5999
Disciplinas: humanidades digitais
Idiomas da publicação: inglês, francês

Processo de avaliação: estudo cego
CC BY 4.0 licence

Editor: Inria
- Endereço postal: Domaine de Voluceau Rocquencourt – B.P. 105 78153 Le Chesnay Cedex
- País: França
Contacto: jdmdh AT episciences.org

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Últimos artigos

The Effects of Political Martyrdom on Election Results: The Assassination of Abe

In developed nations assassinations are rare and thus the impact of such acts on the electoral and political landscape is understudied. In this paper, we focus on Twitter data to examine the effects of Japan's former Primer Minister Abe's assassination on the Japanese House of Councillors elections in 2022. We utilize sentiment analysis and emotion detection together with topic modeling on over 2 million tweets and compare them against tweets during previous election cycles. Our findings indicate that Twitter sentiments were negatively impacted by the event in the short term and that social media attention span has shortened. We also discuss how "necropolitics" affected the outcome of the elections in favor of the deceased's party meaning that there seems to have been an effect of Abe's death on the election outcome though the findings warrant further investigation for conclusive results.

Takagi, Miu Nicole

22 septembre 2023

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Interactive Analysis and Visualisation of Annotated Collocations in Spanish (AVAnCES)

Phraseology studies have been enhanced by Corpus Linguistics, which has become an interdisciplinary field where current technologies play an important role in its development. Computational tools have been implemented in the last decades with positive results on the identification of phrases in different languages. One specific technology that has impacted these studies is social media. As researchers, we have turned our attention to collecting data from these platforms, which comes with great advantages and its own challenges. One of the challenges is the way we design and build corpora relevant to the questions emerging in this type of language expression. This has been approached from different angles, but one that has given invaluable outputs is the building of linguistic corpora with the use of online web applications. In this paper, we take a multidimensional approach to the collection, design, and deployment of a phraseology corpus for Latin American Spanish from Twitter data, extracting features using NLP techniques, and presenting it in an interactive online web application. We expect to contribute to the methodologies used for Corpus Linguistics in the current technological age. Finally, we make this tool publicly available to be used by any researcher interested in the data itself and also on the technological tools developed here.

Gonzalez, Simon

22 septembre 2023

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jGCC

[journal of Groups, Complexity, Cryptology]

jGCC

journal of Groups, Complexity, Cryptology

A journal of Groups, Complexity, Cryptology (jGCC) é a continuação da revista Groups, Complexity, Cryptology criada em 2009. Revista semestral especializada, a jGCC publica em inglês artigos de investigação nas áreas da teoria combinatória e computacional dos grupos, da teoria da complexidade e da criptologia.

Diretor de publicação: Murray Elder
Redators responsáveis: Murray Elder e Vladimir Shpilrain
Tipo de suporte: digital
Periodicidade: semestral
Ano de criação: 2009
Data de disponibilização online na Episciences: 2020
eISSN: 1869-6104
Disciplinas: teoria dos grupos combinatório e computacional, teoria da complexidade, criptologia
Idiomas da publicação: inglês

Processo de avaliação: estudo cego
CC BY 4.0 licence

Contacto: gcc-contact AT episciences.org

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Últimos artigos

Bounding conjugacy depth functions for wreath products of finitely generated abelian groups

In this article, we study the asymptotic behaviour of conjugacy separability for wreath products of abelian groups. We fully characterise the asymptotic class in the case of lamplighter groups and give exponential upper and lower bounds for generalised lamplighter groups. In the case where the base group is infinite, we give superexponential lower and upper bounds. We apply our results to obtain lower bounds for conjugacy depth functions of various wreath products of groups where the acting group is not abelian.

Ferov, Michal

28 septembre 2023

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An axiomatization for the universal theory of the Heisenberg group

The Heisenberg group, here denoted $H$, is the group of all $3\times 3$ upper unitriangular matrices with entries in the ring $\mathbb{Z}$ of integers. A.G. Myasnikov posed the question of whether or not the universal theory of $H$, in the language of $H$, is axiomatized, when the models are restricted to $H$-groups, by the quasi-identities true in $H$ together with the assertion that the centralizers of noncentral elements be abelian. Based on earlier published partial results we here give a complete proof of a slightly stronger result.

Gaglione, Anthony M.

31 août 2023

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JIMIS

[Journal of Interdisciplinary Methodologies and Issues in Science]

JIMIS

Journal of Interdisciplinary Methodologies and Issues in Science

Criada em 2016, a Journal of Interdisciplinary Methodologies and Issues in Science (JIMIS) é uma revista interdisciplinar que cruza os olhares científicos entre as ciências humanas e sociais e as ciências exatas e experimentais. Apoiada pela UMR Espace, a publicação aborda temas transversais, temáticos ou metodológicos, sob forma de números especiais transdisciplinares. Os artigos são publicados gradualmente nas línguas inglesa e francesa.

Diretor de publicação: Didier Josselin
Redator responsável: Didier Josselin
Tipo de suporte: digital
Periodicidade: gradual
Ano de criação: 2016
Data de disponibilização online na Episciences: 2016
eISSN: 2430-3038
Disciplinas: interdisciplinar
Idiomas da publicação: inglês, francês

Processo de avaliação: estudo cego
CC BY 4.0 licence

Editor: UMR7300 Espace
- Endereço postal: 74 rue Louis Pasteur, 84029 Avignon Cedex
- País: França
Contacto: jimis AT espisciences.org

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Le projet architectural à travers une pensée croisée entre l'art et la science

L’enseignement de l’architecture se présente comme un carrefour d’échange interdisciplinaire, qui ne se base pas seulement sur le volet pratique, mais qui comporte une approche théorique faisant appel aux notions et références développées dans les cours théoriques. Il se présente ainsi comme un laboratoire de recherche et d’expérimentation sur l’architecture dans son écriture extérieure et intérieure en tant que discipline intégrant la forme et l’espace, développant des approches pédagogiques interactives et complémentaires. Le choix d’un dispositif pédagogique comme prétexte pour aborder l’interdisciplinarité dans le projet architectural devrait en conséquence être bien réfléchi avec un cheminement méthodologique ciblé qui permettrait d’explorer la synergie entre architecture et ingénierie, architecture et design de l’espace, architecture et sculpture, architecture et urbanisme. Faire intervenir les spécialistes tels que plasticien, ingénieur, historien, sociologue, conservateur du patrimoine et urbaniste dans la conception d’un projet architectural ne peut qu’enrichir les connaissances de l’apprenant et développer chez lui un esprit de collaboration et d’échange.

Zair, Kaouthar

28 septembre 2023

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Espaces odorants et espaces olfactifs

Attester le partage d'une expérience olfactive par plusieurs individus est une gageure, du fait d'obstacles théoriques et méthodologiques souvent présentés comme irréductibles. Après une brève discussion de la réalité de cette irréductibilité, nous essayons de surmonter certains de ces obstacles en distinguant espaces odorants et espaces olfactifs. Si un espace odorant peut-être objectivé et donc partagé, il n'en va pas de même d'un espace olfactif qui relève d'une expérience subjective. Cependant, l'effet invasif des molécules odorantes, plus spécifiquement celles qui provoquent des « mauvaises odeurs », est de nature à atténuer cette subjectivité et, du même coup, à faciliter le partage d'un espace olfactif. Notre argumentation prend appui sur des enquêtes ethnographiques menées au Brésil, en Chine et en Inde et sur une recherche menée en géographie sur la spatialisation des nuisances olfactives.

Hassine, Jamel, Ben

26 septembre 2023

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JIPS

[Journal d’Interaction Personne-Système]

JIPS

Journal d’Interaction Personne-Système

Criada em 2008 pela Association francophone d’interaction humain-machine, a Journal d’Interaction Personne-Système (JIPS) sucede a Revue d’Interaction Homme-Machine (RIHM) fundada em 1997 e ativa até 2007 (tornando-se de seguida a Revue des Interactions Humaines Médiatisées).

A JIPS deixou de publicar em abril de 2022; os artigos publicados permanecem no site da revista.

Diretora de publicação: Sophie Dupuy-Chessa
Tipo de suporte: digital
Estado da coleção: 2010-2020
Ano de criação: 2008
Data de disponibilização online na Episciences: 2008
eISSN: 2418-1838
Disciplinas: engenharia, tecnologias, ciências cognitivas
Idiomas da publicação: inglês, francês
CC BY 4.0 licence
Editor: Association Francophone d’Interaction Homme-Machine (AFIHM)
- Endereço postal: 385 rue de la Bibliothèque, 38041 Grenoble Cedex
- País: França

Contacto: presidence AT afihm.org

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Processus de changement de comportement : états, transitions et déterminants du comportement

Si le but et les garde-fous éthiques de la persuasion sont aujourd’hui bien compris, la littérature est abondante et les analyses critiques multiples, sans qu’un langage de comparaison n’ait été défini. Cet article propose les concepts d’états, de transitions et de déterminants pour caractériser les travaux de la littérature et ainsi en faciliter la compréhension et la comparaison. L’opérationnalisation de ce cadre ouvre des perspectives intéressantes au domaine.

Fenicio, Alessandro

08 février 2021

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L’adaptation pour une persuasion durable

Persuader est difficile ; persuader sur la durée l’est encore plus. Nous explorons l’adaptation pour apporter de la variété et de la pertinence à la persuasion et ainsi pallier l’usure de l’efficacité des messages persuasifs. Le cas d’étude est TILT, un dispositif persuasif pour la régulation du temps d’usage du smartphone. La persuasion de TILT s’appuie sur le principe d’auto-surveillance. L’expérimentation démontre la pertinence de l’adaptation du message persuasif comme renfort de l’efficacité du principe d’auto-surveillance dans le temps.

Foulonneau, Anthony

22 janvier 2021

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JNSAO

[Journal of Nonsmooth Analysis and Optimization]

JNSAO

Journal of Nonsmooth Analysis and Optimization

Criada em 2019, a Journal of Nonsmooth Analysis and Optimization (JNSAO) publica gradualmente artigos em inglês sobre todos os aspetos da análise não lisa relacionada com a otimização e os problemas de equilíbrio.

Diretor de publicação: Christian Clason
Redators responsáveis: Christian Clason e Tuomo Valkonen
Tipo de suporte: digital
Periodicidade: gradual
Ano de criação: 2019
Data de disponibilização online na Episciences: 2019
eISSN: 2700-7448
Disciplinas: análise variacional, teoria e algoritmos
Idiomas da publicação: inglês
Processo de avaliação: estudo cego
CC BY 4.0 licence

Contacto: jnsao AT episciences.org

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Proximal methods for point source localisation

Point source localisation is generally modelled as a Lasso-type problem on measures. However, optimisation methods in non-Hilbert spaces, such as the space of Radon measures, are much less developed than in Hilbert spaces. Most numerical algorithms for point source localisation are based on the Frank-Wolfe conditional gradient method, for which ad hoc convergence theory is developed. We develop extensions of proximal-type methods to spaces of measures. This includes forward-backward splitting, its inertial version, and primal-dual proximal splitting. Their convergence proofs follow standard patterns. We demonstrate their numerical efficacy.

Valkonen, Tuomo

21 septembre 2023

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Optimal Control of a Viscous Two-Field Damage Model with Fatigue

Motivated by fatigue damage models, this paper addresses optimal control problems governed by a non-smooth system featuring two non-differentiable mappings. This consists of a coupling between a doubly non-smooth history-dependent evolution and an elliptic PDE. After proving the directional differentiability of the associated solution mapping, an optimality system which is stronger than the one obtained by classical smoothening procedures is derived. If one of the non-differentiable mappings becomes smooth, the optimality conditions are of strong stationary type, i.e., equivalent to the primal necessary optimality condition.

Betz, Livia

11 août 2023

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J. Philos. Econ.

[Journal of Philosophical Economics]

J. Philos. Econ.

Journal of Philosophical Economics

Journal of Philosophical Economics é uma revista de ciências sociais criada em 2007. Editada pela Editura ASE, J. Philos. A Econ. publica um volume por ano com artigos e recensões de obras em alemão, inglês ou francês.

Diretor de publicação: Dr. Simona Bușoi
Redator responsável: Valentin Cojanu
Tipo de suporte: papel e digital
Periodicidade: anual
Ano de criação: 2007
Data de disponibilização online na Episciences: 2021
eISSN: 1844-8208
Disciplinas: ciências sociais, filosofia, teoria económica
Idiomas da publicação: alemão, inglês, francês

Processo de avaliação: estudo cego
CC BY-NC-SA 4.0 licence

Editor: Editura ASE
- Endereço postal: Academia de Studii Economice Bucuresti, Piata Romana 6, 010374 Bucuresti
- País: Roménia
Contacto: jpe AT episciences.org

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Ways of Knowing Agency and Development: notes on the philosophy of science and the conduct and use of inquiry

Development is a value-laden concept and, as such, an essentially contested issue. To different extents, different ideas of development entail different assumptions about human agency. Although economics has been the most influential discipline, increasingly different accounts highlight distinct features of human beings and the contexts they inhabit, which lead to different implications. This article seeks to delineate the boundaries of the discussion and map out what are arguably the main alternatives within the field. Since such discussion deals with the question of what human action is, the argument is elaborated from the philosophy of science. Contra convention, the discussion uses a philosophical ontology, which is concerned with out connection to the world. Jackson’s heuristic is adopted to generate four philosophies of science and four notions of agency, regarded as ideal typical. Neopositivism advances a rational agent, reflexivity suggests a patient, critical realism furthers an interagent, and analyticism proposes a transagent. This article invites scholars and practitioners interested in this increasingly interdisciplinary area to raise their awareness regarding the foundations on which their ideas about human agency build and note the implications they have for the production and consumption of knowledge.

Garcés-Velástegui, Pablo

25 avril 2023

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Lehmann’s Analytical Inconsistencies on Liberalism and Capitalism

Review of Lehmann, P.-J., Liberalism and Capitalism Today, London, Hoboken: ISTE-Wiley, 2021, 214 pp, ISBN 978-1-78630-689-0

Văduva, Ionuț

13 février 2023

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Mecânica

JTCAM

[Journal of Theoretical, Computational and Applied Mechanics]

JTCAM

Journal of Theoretical, Computational and Applied Mechanics

Criada em 2021, a Journal of Theoretical, Computational and Applied Mechanics (JTCAM) acolhe trabalhos de investigação em inglês na área da mecânica dos sólidos e da mecânica dos materiais e estruturas. A revista publica gradualmente contribuições de investigação teóricas, digitais, aplicadas e experimentais.

Diretor de publicação: Bruno Sportisse
Conselho Editorial: Laurence Brassart ; Shaocheng Ji ; Anna Pandolfi ; Alexander Popp ; Julien Réthoré ; Olivier Thomas ; Laszlo S. Toth
Tipo de suporte: digital
Periodicidade: gradual
Ano de criação: 2021
Data de disponibilização online na Episciences: 2021
eISSN: 2726-6141
Disciplinas: mecânica teórica, computacional e aplicada, mecânica dos sólidos, mecânica dos materiais e das estruturas
Idiomas da publicação: inglês
Processo de avaliação: avaliação aberta o estudo cego
CC BY 4.0 licence
Editor: Inria
- Endereço postal: Domaine de Voluceau Rocquencourt, BP 105, 78153 Le Chesnay Cedex
- País: França

Contacto: jtcam AT episciences.org

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Crack branching at low tip speeds: spilling the T

Using the criterion that a crack will extend along the direction of maximum circumferential stress, this paper demonstrates the influence of the coupling between the crack-parallel T-stress and the tip speed on the directional (in)stability of dynamics cracks in brittle materials, i.e., branching, turning, and limiting velocities. The proposed (in)stability criterion evolves within the theory of dynamic fracture: we build on the work of Ramulu and Kobayashi (1983) by introducing a reference distance ahead of the crack-tip to incorporate the contribution of the higher-order terms in the asymptotic solution of the elastic crack-tip fields. The theoretical aspect is first explored, a methodology to numerically (and experimentally) advocate the instability—as a co-action of T-stress and a fast-running crack—is then proposed and validated on Borden et al. (2012)’s branching benchmark. An experimental setup combining Ultra-High-Speed High-Resolution imaging with advanced Digital Image Correlation algorithms and a novel crack-branching inertial impact test enables for never-seen-before quantification of the rich dynamical behaviour of the fracture. This permits the experimental validation of the developed crack (in)stability criterion.

Eid, Elie

17 août 2023

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The average conformation tensor of inter-atomic bonds as an alternative state variable to the strain tensor: definition and first application — the case of nanoelasticity

Most of the mechanical models for solid state materials are in a methodological framework where a strain tensor, whatever it is, is considered as a thermodynamic state variable. As a consequence, the Cauchy stress tensor is expressed as a function of a strain tensor—and, in many cases, of one or more other state variables, such as the temperature. Such a choice for the kinematic state variable is clearly relevant in the case of infinitesimal or finite elasticity. However, one can ask whether an alternative state variable could not be considered. In the case of finite elastoplasticity, the choice of a strain tensor as the basic, kinematic state variable is not totally without issue, in particular in relation to the physical meaning of the internal state variable describing the permanent strains. In any case, this paper proposes an alternative to the strain tensor as a state variable, which is not based on the deformation (Lagrangian) gradient: the average conformation tensor of inter-atomic bonds. The purpose, however, is restricted to (1) a particular type of materials, namely the pure substances (copper or aluminum, for instance), (2) the nanoscale, and (3) the case of elasticity. The very simple case of two atoms of a pure substance in the solid state is first considered. It is shown that the kinematics of the inter-atomic bond can be characterized by a so called ``conformation'' tensor, and that the tensorial internal force acting on it can be immediately deduced from a single scalar function, depending only on the conformation tensor: the state potential of free energy (or interaction potential). Using an averaging procedure, these notions are then extended to a finite set of atoms, namely an atom and its first neighbours, which can be seen as the ``unit cell'' of a pure substance in the solid state considered as a discrete medium. They are also transposed to the Continuum case, where an expression of the Cauchy stress tensor is proposed as the first derivative of a state potential of density (per unit mass) of average free energy of inter-atomic bonds, which is an explicit function of the average conformation tensor of inter-atomic bonds. By applying a standard procedure in Continuum Thermodynamics, it is then shown that the objective part of the material derivative of this new state variable, at least in the case when the pure substance can be considered as an elastic medium, is equal to the symmetric part of the Eulerian velocity gradient, that is the rate of deformation tensor. In the case of uniaxial tension, a simple relationship is eventually set out between the average conformation tensor and a strain tensor, which is correctly approximated by the usual infinitesimal strain tensor as long as the conformation variations (from an initial state of conformation) are ``small''. From this latter result, and assuming an elastic behavior, a simple expression for the state potential of density of average free energy is inferred, showing great similarities with—but not equivalent to—the classical model of isotropic, linear elasticity (Hooke's law).

Désoyer, Thierry

05 juin 2023

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LMCS

[Logical Methods in Computer Science]

LMCS

Logical Methods in Computer Science

A Logical Methods in Computer Science (LMCS) publica gradualmente artigos de investigação em inglês sobre áreas teóricas e práticas da informática envolvendo métodos lógicos, no sentido mais amplo. Criada em 2014, a revista é editada pela Logical Methods in Computer Science e.V., uma organização sem fins lucrativos cujo objetivo é facilitar a difusão dos resultados científicos relativos à lógica em informática.

Diretor de publicação: Lars Birkedal
Redator responsável: Stefan Milius
Tipo de suporte: digital
Periodicidade: gradual
Ano de criação: 2014
Data de disponibilização online na Episciences: 2015
eISSN: 1860-5974
Disciplinas: métodos lógicos
Idiomas da publicação: inglês

Processo de avaliação: estudo cego
CC BY 4.0 licence

Editor: Logical Methods in Computer Science e.V.
- País: Alemanha
Contacto: lmcs AT episciences.org

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Answer Counting under Guarded TGDs

We study the complexity of answer counting for ontology-mediated queries and for querying under constraints, considering conjunctive queries and unions thereof (UCQs) as the query language and guarded TGDs as the ontology and constraint language, respectively. Our main result is a classification according to whether answer counting is fixed-parameter tractable (FPT), W[1]-equivalent, #W[1]-equivalent, #W[2]-hard, or #A[2]-equivalent, lifting a recent classification for UCQs without ontologies and constraints due to Dell et al. The classification pertains to various structural measures, namely treewidth, contract treewidth, starsize, and linked matching number. Our results rest on the assumption that the arity of relation symbols is bounded by a constant and, in the case of ontology-mediated querying, that all symbols from the ontology and query can occur in the data (so-called full data schema). We also study the meta-problems for the mentioned structural measures, that is, to decide whether a given ontology-mediated query or constraint-query specification is equivalent to one for which the structural measure is bounded.

Feier, Cristina

14 septembre 2023

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Arboreal Categories: An Axiomatic Theory of Resources

Game comonads provide a categorical syntax-free approach to finite model theory, and their Eilenberg-Moore coalgebras typically encode important combinatorial parameters of structures. In this paper, we develop a framework whereby the essential properties of these categories of coalgebras are captured in a purely axiomatic fashion. To this end, we introduce arboreal categories, which have an intrinsic process structure, allowing dynamic notions such as bisimulation and back-and-forth games, and resource notions such as number of rounds of a game, to be defined. These are related to extensional or "static" structures via arboreal covers, which are resource-indexed comonadic adjunctions. These ideas are developed in a general, axiomatic setting, and applied to relational structures, where the comonadic constructions for pebbling, Ehrenfeucht-Fra\"iss\'e and modal bisimulation games recently introduced by Abramsky et al. are recovered, showing that many of the fundamental notions of finite model theory and descriptive complexity arise from instances of arboreal covers.

Abramsky, Samson

10 août 2023

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MNA

[Mathematical Neuroscience and Applications]

MNA

Mathematical Neuroscience and Applications

Criada em 2021, a revista Mathematical Neuroscience and Applications (MNA) preocupa-se com a modelização e a análise matemática em todas as áreas das neurociências, isto é, o estudo do sistema nervoso e das suas disfunções. É a continuidade do Journal of Mathematical Neuroscience (2011-2021), anteriormente publicado na Springer. A revista acolha artigos na língua inglesa.

Diretor de publicação: Bruno Sportisse
Redator responsável: Olivier Faugeras
Tipo de suporte: digital
Periodicidade: anual
Ano de criação: 2021
Data de disponibilização online na Episciences: 2021
eISSN: 2801-0159
Disciplinas: neurociências
Idiomas da publicação: inglês
Processo de avaliação: estudo cego
CC BY 4.0 licence
Editor: Inria
- Endereço postal: Domaine de Voluceau Rocquencourt – B.P. 105 78153 Le Chesnay Cedex
- País: França
Contacto: mna AT episciences.org

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Propagation of chaos in mean field networks of FitzHugh-Nagumo neurons

In this article, we are interested in the behavior of a fully connected network of $N$ neurons, where $N$ tends to infinity. We assume that the neurons follow the stochastic FitzHugh-Nagumo model, whose specificity is the non-linearity with a cubic term. We prove a result of uniform in time propagation of chaos of this model in a mean-field framework. We also exhibit explicit bounds. We use a coupling method initially suggested by A. Eberle (arXiv:1305.1233), and recently extended in (1805.11387), known as the reflection coupling. We simultaneously construct a solution of the $N$-particle system and $N$ independent copies of the non-linear McKean-Vlasov limit in such a way that, considering an appropriate semi-metric that takes into account the various possible behaviors of the processes, the two solutions tend to get closer together as $N$ increases, uniformly in time. The reflection coupling allows us to deal with the non-convexity of the underlying potential in the dynamics of the quantities defining our network, and show independence at the limit for the system in mean field interaction with sufficiently small Lipschitz continuous interactions.

Colombani, Laetitia

19 juin 2023

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Gabor frames from contact geometry in models of the primary visual cortex

We analyze the interplay between contact geometry and Gabor filters signal analysis in geometric models of the primary visual cortex. We show in particular that a specific framed lattice and an associated Gabor system is determined by the Legendrian circle bundle structure of the $3$-manifold of contact elements on a surface (which models the V1-cortex), together with the presence of an almost-complex structure on the tangent bundle of the surface (which models the retinal surface). We identify a scaling of the lattice, also dictated by the manifold geometry, that ensures the frame condition is satisfied. We then consider a $5$-dimensional model where receptor profiles also involve a dependence on frequency and scale variables, in addition to the dependence on position and orientation. In this case we show that a proposed profile window function does not give rise to frames (even in a distributional sense), while a natural modification of the same generates Gabor frames with respect to the appropriate lattice determined by the contact geometry.

Liontou, Vasiliki

06 juin 2023

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MOS

[Management et organisations du sport]

MOS

Management et organisations du sport

Revista científica da Sociedade Savante de Management du Sport, a Management & Organisations du Sport (MOS), criada em 2020, propõe artigos de investigação na língua inglesa e francesa. Publicados gradualmente, os artigos abordam várias aspetos da organização e da gestão do desporto através de diferentes olhares disciplinares.

Diretor de publicação: Patrick Bouchet
Redator responsável: Guillaume Bodet
Tipo de suporte: digital
Periodicidade: gradual
Ano de criação: 2020
Data de disponibilização online na Episciences: 2020
eISSN: 2804-8598
Disciplinas: gestão do desporto, ciências da gestão
Idiomas da publicação: inglês, francês

Processo de avaliação: estudo cego
CC BY 4.0 licence

Editor: Société Savante de Management du Sport (S2MS)
- Endereço postal: 27/29 boulevard du 11 novembre 1918, 69622 Villeurbanne Cedex
- País: França
Contacto: mos AT episciences.org

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Les projets olympiques au service des politiques sportives partenariales. Le cas de la Fédération française de cyclisme et de la communauté d'agglomération de Saint-Quentin-en-Yvelines

Le présent article interroge la capacité des candidatures olympiques à créer les conditions de l'articulation entre les politiques sportives fédérales et locales. Il s'appuie sur un cas d'étude portant sur la relation entre Saint-Quentin-en-Yvelines (un territoire intercommunal situé à 20 kilomètres de Paris) et la Fédération française de cyclisme entre 2000 et 2020. La contribution retrace le processus de collaboration entre ces deux organisations dans les contextes de candidature parisienne aux Jeux Olympiques et Paralympiques de 2012 et de 2024. En s'appuyant sur la force explicative des dynamiques locales, les auteurs mobilisent la théorie des flux de Kingdon (1984) pour souligner le rôle déterminant des candidatures olympiques dans la convergence des flux des problèmes, de la politique et des politiques publiques. Celles-ci favorisent donc l'ouverture de fenêtres d'opportunité vers la mise en place de politiques sportives partenariales.

Lopez, Clément

31 août 2023

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Revisiting innovation: the organizational vulnerability of small or medium companies innovating in the outdoor sports sector

Au sein de l’industrie des articles de sport, il est convenu d’affirmer que l’innovation est susceptible de procurer un avantage concurrentiel. Il s’agit cependant aussi d’une activité risquée qui peut entraîner des conséquences moins vertueuses pour les entreprises. Quitte à s’inscrire à contre-courant de l’injonction contemporaine à innover, il semble pertinent de s’intéresser aux potentiels effets néfastes des processus d’innovation au sein des petites entreprises du secteur du sport, particulièrement créatives. Dans cet article, nous cherchons donc à savoir si, et le cas échéant comment, l’engagement dans un processus d’innovation conduit à des formes singulières de vulnérabilité organisationnelle.Des études de cas ont été réalisées dans cinq entreprises françaises spécialisées dans l’outdoor (trois PME et deux TPE). Nous avons mené un total de 48 entretiens avec différents acteurs des processus d’innovation, accompagnés d’observations de terrain et d’analyses de données secondaires. Plusieurs résultats marquants ressortent. La priorité fréquemment donnée à la réponse aux défis techniques est susceptible d’éloigner le produit du client et de son utilisation réelle. Dans certains cas, une forme de « fièvre de l’innovation » génère des déséquilibres internes. Par ailleurs, certaines entreprises sont trop dépendantes de l’inventeur-entrepreneur, acteur clé de leur fonctionnement, mais aussi de son réseau de proximité ; cela peut impliquer un affaiblissement du réseau d’innovation, notamment lors de la phase cruciale de découplage. Enfin, si la création de réseaux d’innovation est nécessaire, elle accentue la dépendance vis-à-vis des parties prenantes et expose à des menaces spécifiques.En termes d’implications managériales, il ressort qu’une confiance excessive dans les avantages de l’innovation peut s’avérer problématique. Il ne s’agit pas de décourager les innovateurs, mais de rappeler la nature contingente et incertaine des processus dans lesquels ils s’engagent, ce qui nécessite anticipation et mesure. Le défi consiste à gérer à la fois le présent et l’avenir, tout en reconnaissant que l’exploitation d’une routine n’empêche pas l’exploration de nouvelles solutions.

Soulé, Bastien

28 juillet 2023

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OCNMP

[Open Communications in Nonlinear Mathematical Physics]

OCNMP

Open Communications in Nonlinear Mathematical Physics

Criada em 2020, a Open Communications in Nonlinear Mathematical Physics (OCNMP) é uma revista de matemática centrada nos problemas não lineares da física matemática. Insere-se na continuidade do Journal of Nonlinear Mathematical Physics (1994-2020) e publica anualmente artigos em inglês.

Diretor de publicação: Norbert Euler
Redator responsável: Norbert Euler
Tipo de suporte: digital
Periodicidade: anual
Ano de criação: 2020
Data de disponibilização online na Episciences: 2021
eISSN: 2802-9356
Disciplinas: matemática, física matemática, ciências não lineares
Idiomas da publicação: inglês, francês
Processo de avaliação: estudo cego
CC BY 4.0 licence

Contacto: ocnmp AT episciences.org

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Derivation of Painlevé type system with $D_4^{(1)}$ affine Weyl group symmetry in a self-similarity limit

We show how the zero-curvature equations based on a loop algebra of $D_4$ with a principal gradation reduce via self-similarity limit to a polynomial Hamiltonian system of coupled Painlev\'e III models with four canonical variables and $D_4^{(1)}$ affine Weyl group symmetry.

Aratyn, H.

06 septembre 2023

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Integrable Ito equations and properties of the associated Fokker-Planck equations

In a recent paper we have classified scalar Ito equations which admits a standard symmetry; these are also directly integrable by the Kozlov substitution. In the present work, we consider the diffusion (Fokker-Planck) equations associated to such symmetric Ito equations.

Gaeta, Giuseppe

21 juin 2023

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RDM

[Recherche en Didactique des Mathématiques]

RDM

Recherche en Didactique des Mathématiques

Em breve

Fundada em 1980, Recherches en Didactique des Mathématiques é uma revista internacional que relata a investigação fundamental na didática da matemática. Editada pela Association pour la Recherche en Didactique des Mathématiques, publica artigos em inglês, francês e espanhol três vezes por ano.

Diretora de publicação: Marie-Line Gardes
Directora editorial: Cécile Ouvrier-Buffet
Redator e redatora responsáveis: Nicolas Grenier-Boley y Sophie Soury-Lavergne
Tipo de suporte: digital
Periodicidade: três vezes por ano
Ano de criação: 1980
Data de disponibilização online na Episciences: 2023
eISSN: 2728-2422
Disciplinas: matemática aplicada, didática da matemática
Idiomas da publicação: francês, inglês, espanhol
Processo de avaliação: estudo cego
Licença CC BY 4.0
Editor: Association pour la Recherche en Didactique des Mathématiques (ARDM)
- Endereço postal: Institut Henri Poincaré, 11 rue Pierre et Marie Curie, 75005 Paris
- País: França
Contacto: rdm AT episciences.org

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Slovo

A revista anual Slovo (a palavra ou verbo em russo e noutras línguas eslavas) publica artigos sobre línguas, literaturas, culturas e as civilizações dos povos do espaço pós-soviético (eslavos, siberianos, fino-úgricos, caucasianos, bálticos ou da Ásia central) e da Europa central e balcânica. Criada em 1978 e editada pela Presses de l’Inalco, a revista é, em simultâneo, multivertente e transdisciplinar, abrangendo a maioria das disciplinas das ciências humanas e sociais.

Diretor de publicação: Jean-François Huchet
Redatoras responsáveis: Catherine Géry e Marie Vrinat-Nikolov
Tipo de suporte: papel e digital
Periodicidade: anual
Ano de criação: 1978
Data de disponibilização online na Episciences: 2017
eISSN: 2557-9851
Disciplinas: antropologia, artes, história, linguística, literatura, ciências sociais, ciências sociais
Idiomas da publicação: inglês, francês

Processo de avaliação: revisão pelos pares
CC BY-NC-ND 4.0 licence

Editor: Presses de l’Inalco
- Endereço postal: 2 rue de Lille, 75007 Paris
- País: França
Contacto: slovo AT episciences.org

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La réception en France de la musique soviétique : l'évolution de la censure de 1948 à 1958

Cet article étudie la réception en France des discours des autorités soviétiques sur la musique. La période de l’après-guerre est intéressante à plus d’un titre. Le paysage politique évolue avec les décès de Jdanov et Staline et deux décrets relatifs à la production musicale sont publiés en 1948 et 1958. Les bulletins de presse du ministère des Affaires étrangères et la production journalistique et intellectuelle à prétention savante du PCF sont des indicateurs de la réception de la musique soviétique dans l’espace public français. Nous apprécions l’évolution de la censure en URSS grâce aux discours en France sur le musicien professionnel et l’opéra soviétiques. La censure en URSS n’ayant pas toujours été maîtrisée, il convient de questionner le rôle des intellectuels communistes soviétiques et français. Nous appréhendons ainsi le réalisme socialiste en musique, mais aussi les désaccords que produit l’application de tels principes idéologiques. Bien que les sympathisants français traitent abondamment les actualités musicales soviétiques, on est amené à observer des divergences d’opinion, résultats de la diversité des cadres éditoriaux.

Thisselin, Thomas

23 mai 2023

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In vino veritas ou faut-il boire pour comprendre Erofeev ?: Remarques à propos de l’enregistrement sonore de la lecture publique de Moscou-sur-Vodka par Erofeev

Cet article a pour objet l’élaboration d’une piste d’intégration de l’enregistrement sonore de la lecture d’un texte par son auteur dans le cadre de recherches en littérature. Le texte se penche plus précisément sur l’enregistrement de la lecture de Moscou-sur-vodka par Venedikt Erofeev en 1980. Cet enregistrement renvoie à la problématique de l’interprétation littéraire et de la voix. En effet, par la double intervention d’Erofeev, lors de la rédaction puis la lecture publique du texte, cet enregistrement pourrait possiblement restreindre la diversité interprétative de l’œuvre. Pourtant, le contexte et la nature de cette lecture publique ne mènent pas nécessairement à l’écueil de l’interprétation strictement centrée sur l’auteur. Cette lecture enregistrée à haute voix d’Erofeev s’apparente plutôt à un rappel de la vocalité intrinsèque de l’œuvre – un aspect du texte qui peut se perdre lors de la lecture silencieuse répétée.

Lakine, Denis

23 mai 2023

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Sociétés plurielles

A Sociétés plurielles, criada em 2017, resultou do programa de investigação do mesmo nome associando várias universidades da Île-de-France na COMUE Sorbonne Paris Cité. Publicada pela Presses de l’Inalco, acolhe artigos em francês, inglês, espanhol, alemão ou italiano. A revista abrange todos os campos de estudos abrangidos pelo plural na sociedade e apoia firmemente as abordagens interdisciplinares.

Diretor de publicação: Jean-François Huchet
Redatora responsável: Madalina Vartejanu-Joubert
Tipo de suporte: digital
Periodicidade: anual
Ano de criação: 2017
Data de disponibilização online na Episciences: 2017
eISSN: 2557-9959
Disciplinas: estudos de área, sociolinguística
Idiomas da publicação: inglês, francês

Processo de avaliação: revisão pelos pares
CC BY-NC 4.0 licence

Editor: Presses de l’Inalco
- Endereço postal: 2 rue de Lille, 75007 Paris
- País: França
Contacto: societes-plurielles AT episciences.org

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L’archéologie au service des identités nationales : pourquoi faudrait-il détruire les collections de moulages d’art antique ?

À l’instar de l’Allemagne et à partir des années 1870, le moulage d’art antique fait l’objet d’un véritable « transfert culturel » en France et en Italie. Ce processus qui témoigne de l’émergence de l’archéologie en tant que science, s’insère dans le cadre plus vaste d’une modification de l’enseignement supérieur et d’une construction (dans le cas de l’Italie) ou d’un redressement de la nation (en France). Cependant, le processus de consolidation de l’État-nation se fonde sur un autre mécanisme culturel engendré par la mondialisation‑globalisation, à savoir l’« invention de la tradition ». Tels sont les cas notamment du « mythe de la Grèce blanche » ou de celui de la « Romanité » qui peuvent offrir des arguments suffisants pour justifier la destruction des collections de moulages d’art antique.

Avola, Irene

10 mai 2023

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Biais socio-centrés et constructions de l’altérité: Pour une approche anthropologique critique et raisonnée

Le retour sur les héritages coloniaux et les autres formes de domination rendent nécessaires l’approche critique des positions d’autorité fondant le discours scientifique. Quelles seraient les conditions de possibilité d’un savoir faisant droit à des formes alternatives de connaissance du monde et de discours à son sujet ? Toute approche n’apporte-t-elle pas ses biais dans le projet d’un savoir universel ? La réflexion repose sur une enquête ethnographique (Wallis) et le débat actuel sur la restitution, par les anciens pays coloniaux, des collections muséales africaines.

Chave-Dartoen, Sophie

10 mai 2023

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