Relevant bibliographies by topics / Combination de structures conceptuelles

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Combination de structures conceptuelles'

Author: Grafiati
Published: 21 December 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Combination de structures conceptuelles.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Combination de structures conceptuelles"

1

Chemlal, Soulaimane, and Françoise Cordier. "Structures conceptuelles, représentation des objets et des relations entre les objets." Canadian Journal of Experimental Psychology/Revue canadienne de psychologie expérimentale 60, no. 1 (2006): 7–23. http://dx.doi.org/10.1037/cjep2006003.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Waltereit, Richard. "Le rapport dépendanciel entre adjectif et nom : données syntaxiques et structures conceptuelles." Syntaxe et sémantique 4, no. 1 (2003): 179. http://dx.doi.org/10.3917/ss.004.0179.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Quesnay, Paul, Marianne Poumay, and Rémi Gagnayre. "Accompagner la mise en œuvre de l’approche par compétences dans les formations en santé : perspectives d’une stratégie de changement pragmatique portée par un individu tercéisateur dans un institut de formation en ostéopathie." Pédagogie Médicale 23, no. 1 (2022): 49–67. http://dx.doi.org/10.1051/pmed/2022001.

Full text
Abstract:
Contexte : Les réformes selon l’approche par compétences (APC) des formations en santé sont peu documentées dans leur mise en œuvre. Or l’APC nécessite une révision de l’ingénierie pédagogique et des apprentissages spécifiques pour les coordinateurs et enseignants. Se pose alors la question des stratégies mobilisées pour conduire le changement pédagogique. But : Analyser les effets d’une stratégie de changement initiée par un individu-tercéisateur pour la mise en œuvre de l’APC dans un institut de formation initiale en ostéopathie, à travers l’évolution des conceptions des coordinateurs. Proposer un cadre de lecture pour conduire et analyser les changements pédagogiques. Méthodes : Cette étude qualitative s’inscrit dans une épistémologie constructiviste pragmatique et rejoint le cadre de l’éthique des curriculums en santé. Quatre coordinateurs pédagogiques ont participé à l’élaboration de cartes conceptuelles pour suivre l’évolution de leurs conceptions. Trois d’entre eux ont participé à des productions pédagogiques et activités réflexives issues des recommandations sur l’APC : élaboration d’un référentiel, révision d’enseignements et d’outils évaluation. Résultats : Les cartes conceptuelles attestent d’un apprentissage de deux des coordinateurs vers l’APC. Cet apprentissage s’est opéré par une acculturation à partir d’objets-frontières. Les cartes conceptuelles, les activités réflexives proposées à des niveaux individuels, collectifs et institutionnels de même que l’action de l’individu-tercéisateur sont rapportées par les participants comme ayant soutenu l’apprentissage et le changement. Conclusion : L’étude permet de proposer des éléments clés de la stratégie de changement pour son transfert à d’autres contextes de formation. Individus-tercéisateurs, objets-frontières et acculturation constituent une perspective intéressante pour amorcer un changement curriculaire dans des structures de formation en santé qui ne rassembleraient pas toutes les conditions et ressources considérées comme porteuses dans la littérature, ou qui souhaiteraient faire de la formation pédagogique suivie par l’un de leurs enseignants une opportunité de changement.
APA, Harvard, Vancouver, ISO, and other styles
4

White, Deena, and Céline Mercier. "Ressources alternatives et structures intermédiaires dans le contexte québécois." Santé mentale au Québec 14, no. 1 (October 19, 2006): 69–80. http://dx.doi.org/10.7202/031489ar.

Full text
Abstract:
Résumé Au Québec, un consensus semble se dégager ces dernières années sur le besoin de développer des ressources communautaires en santé mentale. Cependant, le concept de ressources communautaires est fragmenté : il y a une distinction à établir, sur le plan conceptuel, entre ressources alternatives et structures intermédiaires. Les deux types de ressources agissent hors les murs des institutions, mais leurs objectifs sont différents de même que les moyens qu'elles proposent pour le soutien dans la communauté des personnes souffrant de problèmes de santé mentale. Les tentatives pour rendre ces concepts opérationnels tendent à avoir pour effet de masquer leurs différences conceptuelles. La nouvelle politique de santé mentale du Québec, adoptée en janvier 1989, parle de "ressources communautaires" seulement et leur donne un mandat qui ne reflète pas la divergence conceptuelle entre les organisations patronnées par le réseau, et celles qui contestent la domination du réseau. Cela peut entraîner une limitation des types de services qui seront offerte au sein de la communauté, dans le contexte de la nouvelle politique.
APA, Harvard, Vancouver, ISO, and other styles
5

Duguay, Lucie. "Entre didactique professionnelle et analyse des interactions." Éducation Permanente N° 238, no. 1 (March 18, 2024): 65–75. http://dx.doi.org/10.3917/edpe.238.0065.

Full text
Abstract:
Cette contribution interroge les pratiques réelles des tuteurs engagés dans l’accompagnement des étudiants sur la place de travail. L’auteure croise les apports de l’analyse des interactions et ceux du champ de la didactique professionnelle. La perspective inter-actionniste permet de décrire la multimodalité en acte : l’usage de la parole mais aussi les dimensions non verbales de la communication dans le cours même de l’action. Dans une approche de didactique professionnelle, la description et l’identification des différentes ressources interactionnelles permet-tent de dégager des structures conceptuelles et de repérer comment sont organisées les pratiques de formation. L’auteure montre la façon dont ces deux perspectives théoriques et méthodologiques s’enrichissent mutuellement en illustrant ces constructions croisées et simultanées.
APA, Harvard, Vancouver, ISO, and other styles
6

Vilette, Bruno. "Les structures conceptuelles centrales à l' épreuve des faits: Le nombre, l'espace et la cognition sociale." Canadian Journal of Behavioural Science / Revue canadienne des sciences du comportement 33, no. 3 (July 2001): 164–75. http://dx.doi.org/10.1037/h0087138.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Biondi, Laura. "Espressioni metaforiche e deriuatio nei grammatici medievali : prime annotazioni." Archivum Latinitatis Medii Aevi 75, no. 1 (2017): 187–216. http://dx.doi.org/10.3406/alma.2017.1230.

Full text
Abstract:
Cette contribution veut examiner les expressions linguistiques de quelques métaphores conceptuelles concernant les res naturae, élaborées par la tradition grammaticale ancienne dans le but de catégoriser et d’interpréter le langage et ses structures. En particulier, l’article analyse une métaphore qui concerne le domaine des eaux, reçue du monde latin par les grammatici du Moyen Âge et appliquée à la notion métalinguistique de la deriuatio. L’emploi extensif de cette métaphore dans la textualité grammaticale médiévale montre l’effort des magistri pour renouveler et resémantiser les motivations originaires ; il correspond à l’intérêt soit pour classer plus nettement la deriuatio et ses modi en tant que dimension linguistique autonome, soit pour délimiter plus précisément son statut épistémique par rapport à d’autres procédés linguistiques tels que etymologia, expositio, interpretatio.
APA, Harvard, Vancouver, ISO, and other styles
8

Sornicola, Rosanna. "L’analisi morfosintattica dei documenti italiani alto-medievali, tra testimonianze della cultura scritta e riflessi degli usi parlati." Archivum Latinitatis Medii Aevi 74, no. 1 (2016): 181–201. http://dx.doi.org/10.3406/alma.2016.1203.

Full text
Abstract:
Ce travail examine les problèmes et les méthodes d’analyse des structures morphosyntaxiques des documents des pays de langue romane au haut Moyen Âge. La première partie est consacrée à la discussion critique de quelques difficultés conceptuelles qui peuvent compliquer l’analyse : les critères de description de phénomènes bien différents de ceux du latin classique (entendu comme le latin du canon grammatical correct), le recours problématique aux catégories linguistiques d’un latin désormais en cours de démantèlement (par exemple les notions de «nominatif » , «génitif » , «datif » , «accusatif » etc.), la représentation du rapport entre langue écrite et langue parlée. On introduit en outre le concept de «polymorphisme » , auquel on confère un rôle central et important dans l’étude de la morphosyntaxe. La seconde partie du travail est consacrée à l’analyse ponctuelle de quelques structures morphologiques et syntaxiques du corpus des documents du ixe siècle conservés à l’abbaye de Cava dei Tirreni. Il s’agit de documents d’un intérêt particulier pour l’étude de la transition du latin aux vulgaires italoromans, et d’une façon plus générale pour la réflexion méthodologique sur la recherche consacrée aux documents du haut Moyen Âge. Les structures examinées permettent de tirer quelques conclusions sur le rapport entre registres de langue écrite et registres de langue parlée au niveau du ixe siècle dans les aires où furent rédigés les documents.
APA, Harvard, Vancouver, ISO, and other styles
9

Ballús, C. "Orientations actuelles de la recherche psychiatrique en espagne." Psychiatry and Psychobiology 2, no. 2 (1987): 101–6. http://dx.doi.org/10.1017/s0767399x00000742.

Full text
Abstract:
RésuméLe développement de la recherche psychiatrique en Espagne est étudié dans cet article dans les champs et les domaines suivants : épidémiologie, clinique et psychopathologie, psychologie médicale, psychiatrie biologique, psychiatrie sociale et psychanalyse.On a par ailleurs répertorié le nombre et les titres des publications scientifiques des cinq dernières années, dans plusieurs revues psychiatriques espagnoles. Cette étude montre une nette prédominance de travaux de psychiatrie biologique et de psychologie médicale.Dans une troisième partie, sont analysés quelques aspects problématiques de la recherche, comme : les facteurs économiques, les facteurs de “structures de recherche”, les facteurs humains ainsi que les problèmes de compréhension mutuelle en présence de tendances conceptuelles différentes.L’article se termine par certaines considérations sur les perspectives futures de la recherche, en considérant les nouveaux cadres législatifs, ainsi que la nécessité de s’adapter aux modèles et aux programmes européens de travail, dans l’optique de l’entrée de l’Espagne dans le Marché Commun.
APA, Harvard, Vancouver, ISO, and other styles
10

Mazurkiewicz, Paulina, and Jan Lazar. "La réalisation des métaphores conceptuelles de la vaccination contre le COVID-19 en français et en tchèque." Roczniki Humanistyczne 71, no. 5 (August 3, 2023): 147–58. http://dx.doi.org/10.18290/rf237105.9.

Full text
Abstract:
Cet article vise à analyser l’expression de la métaphore conceptuelle du vaccin contre le Covid-19 dans le discours médical de vulgarisation en français et en tchèque. Nous avons sélectionné, comme corpus de recherche, des sites Internet de vulgarisation médicale, en prenant en compte le sujet de la vaccination contre le Covid-19 (doctissimo.fr pour la langue française et www.idnes.cz pour la langue tchèque). Les recherches menées montrent un réseau de métaphores pour expliquer un phénomène complexe de lutte efficace contre le virus qui cause cette maladie. Les experts se réfèrent à la métaphore structurelle montrant le transfert des structures conceptuelles du domaine source OPÉRATION MILITAIRE vers le domaine cible VACCINATION. À son tour, le vaccin conceptualisé comme SOLDAT est un exemple d’anthropomorphisation dans une métaphore ontologique. L’examen du corpus comparable a montré une quantité importante d’équivalences lexicales et syntaxiques totales résultant d’une même perception de la réalité pandémique par les Tchèques et les Français. D’autre part, cela peut être dû à la référence à l’anglais, dans lequel la recherche scientifique mondiale s’exprime le plus souvent.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Combination de structures conceptuelles"

1

Leutwyler, Nicolás. "Flexible and Scalable methods for Formal Concept Analysis in Distributed Architectures." Electronic Thesis or Diss., Université de Lorraine, 2024. http://www.theses.fr/2024LORR0112.

Full text
Abstract:
Cette thèse explore l'adaptation de l'Analyse Formelle de Concepts (AFC) pour relever les défis posés par les environnements de données distribués et dynamiques. Cette recherche répond à la nécessité de techniques de fouille de données efficaces dans le contexte de l'Industrie 4.0 et de l'Internet des Objets (IoT), où la génération de données est vaste et continue. Les objectifs principaux incluent le développement de méthodes scalables et flexibles pour éviter la perte de concepts significatifs lors de la construction de réticulé de concepts, la proposition d'algorithmes incrémentaux adaptés aux flux de données en temps réel, et la démonstration des applications pratiques de ces méthodes. La thèse commence par une revue exhaustive de l'état de l'art, définissant les concepts clés de la représentation des connaissances, de la scalabilité et de l'AFC, en soulignant les défis inhérents à la gestion de grands ensembles de données et la nécessité de techniques de fouille de données efficaces. Une revue systématique de la littérature identifie les lacunes des méthodes d'AFC existantes, particulièrement celles applicables aux architectures distribuées, mettant en évidence la nécessité de nouvelles approches pour gérer la croissance exponentielle des concepts formels et la nature dynamique des flux de données. La thèse introduit des algorithmes novateurs pour la fusion des réticulés afin de récupérer des concepts potentiellement perdus et des méthodes incrémentales pour la construction de réticulé de concepts. Ces algorithmes, conçus pour des exécutions mono-thread et parallélisées, améliorent leur scalabilité et flexibilité. Des cas pratiques, comme un système de recommandation pour l'École de Ski Française, démontrent les avantages réels des méthodes proposées. Des évaluations empiriques utilisant des ensembles de données synthétiques et réels valident la performance de ces méthodes, montrant des améliorations significatives dans la gestion de données larges et distribuées. La thèse conclut en résumant les contributions et en suggérant des directions pour de futures recherches afin de renforcer les capacités de l'AFC dans les environnements distribués
This thesis explores adapting Formal Concept Analysis (FCA) to tackle challenges in distributed and dynamic data environments. This research addresses the need for efficient data mining techniques in Industry 4.0 and the Internet of Things (IoT), where data is vast and continuous. The primary goals include developing scalable, flexible methods to prevent the loss of significant concepts during concept lattice construction, proposing incremental algorithms for real-time data streams, and demonstrating practical applications of these methods. The thesis starts with a comprehensive review of current knowledge representation, scalability, and FCA, emphasizing the challenges of large datasets and efficient mining techniques. A systematic literature review identifies gaps in existing FCA methods, particularly for distributed architectures, highlighting the need for new approaches to manage the exponential growth of formal concepts and dynamic data streams. Novel algorithms are introduced for merging lattices to recover lost concepts and incremental methods for constructing concept lattices. These algorithms, designed for both single-threaded and parallel execution, enhance scalability and flexibility. Practical use cases, such as an e-commerce recommendation system for the French Ski School, demonstrate the real-world benefits of the proposed methods. Empirical evaluations using synthetic and real-world datasets validate the performance, showing significant improvements in handling large, distributed data. The thesis concludes by summarizing the contributions and suggesting future research directions to further enhance FCA capabilities in distributed settings
APA, Harvard, Vancouver, ISO, and other styles
2

Popescu, Adrian. "Structures conceptuelles pour la recherche d'images sur Internet." Télécom Bretagne, 2008. http://www.theses.fr/2008TELB0093.

Full text
Abstract:
La recherche d'images représente une partie importante du nombre total des requêtes sur Internet. Malgré leur utilité et leur popularité, les systèmes de recherche actuels souffrent de certaines limitations, comme le manque de sémantique dans le traitement des requêtes, l'imprécision des résultats, une faible interactivité, ou encore, un manque d'intégration de techniques de traitement d'images. Dans cette thèse, nous démontrons que l'exploitation de structures linguistiques à large échelle représente une réponse viable aux problèmes des systèmes actuels de recherche d'images. Cette thèse est constituée de trois parties : La première partie s'intéresse au cadre de notre étude. Pour commencer, nous essayons de répondre à la question " quelles images cherchons-nous ? " en étudiant un fichier de log qui met en évidence quelques domaines conceptuels importants en recherche d'images, comme les noms communs, les noms géographiques ou les personnalités. Ensuite, nous analysons la relation entre les concepts et leur représentation imagée, puis nous introduisons et définissons les structures linguistiques qui sont le cœur de notre approche. Nous concluons cette première partie par la proposition d'une architecture générique d'un système de recherche d'images intégrant des ressources sémantiques et des fonctionnalités de traitements d'images. La deuxième partie étudie la possibilité d'adapter et/ou de construire automatiquement des structures linguistiques à large échelle pour la recherche d'images sur Internet. Cette tâche est particulièrement ardue car il est nécessaire d'acquérir des connaissances de bonne qualité et d'assurer également une bonne couverture des domaines conceptuels analysés. Notre approche combine la réutilisation de ressources existantes, dans une forme adaptée à la recherche d'images et la structuration de nouvelles connaissances. Nous proposons par exemple un algorithme permettant une extraction totalement automatique d'un thésaurus géographique à partir de sources hétérogènes du Web. Nous proposons plusieurs évaluations permettant de valider notre approche. La troisième partie correspond à la dimension applicative de ce travail avec le développement de trois applications permettant le traitement de requêtes traitant des noms communs, des noms géographiques et des personnalités. Les architectures de ces applications sont des déclinaisons de notre architecture générique présentée dans la première partie. Elles intègrent les nouvelles ressources sémantiques que nous avons produites et proposent une recherche par le contenu dirigée par la sémantique. Ces applications sont décrites, illustrées, puis évaluées par rapport à des systèmes existants.
APA, Harvard, Vancouver, ISO, and other styles
3

Gratzmuller-Salamitou, Nicole. "Essai sur la représentation des connaissances en droit, structures conceptuelles." Paris 1, 1986. http://www.theses.fr/1986PA010287.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Covington, J. "Universal ultrahomogeneous structures." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376905.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Aïmeur, Esma. "Metis : un systeme et une methode d'explication de taxinomies destinees a l'identification de structures conceptuelles." Paris 6, 1994. http://www.theses.fr/1994PA066005.

Full text
Abstract:
Dans les sciences d'observation telles que l'archeologie, la mineralogie ou la zoologie, de grandes quantites d'objets sont repertoriees sous forme de taxinomies et exprimees dans des catalogues au moyen d'un langage de description textuel, varie et nuance. La lourde gestion de ces catalogues et les problemes lies a la description et a la caracterisation des classes d'objets, ont fait naitre le besoin de construire d'une part une base de connaissances permettant d'integrer des informations coherentes, homogenes et non redondantes, d'autre part une structure de discrimination fiable, permettant de caracteriser les classes de maniere pertinente. Le principe d'explicitation des connaissances retenu dans le cadre de notre travail repose sur une approche incrementale. Notre systeme metis explicite progressivement les connaissances de l'expert et raffine le langage de description (appele modele structurel) a partir d'une suite de descriptions de classes qui lui sont presentees. Chaque nouvelle classe fournie au systeme, constitue un enrichissement et une nouvelle vision du modele de l'expertise, soit par specialisation d'une description deja acquise, soit par l'ajout d'une nouvelle description. Metis modifie ainsi dynamiquement le modele structurel des descriptions de classes explicitees. La taxinomie du domaine sert de fil conducteur pour guider le processus d'explicitation des connaissances. Elle est progressivement enrichie, permettant ainsi au systeme de presenter les traits discriminants et d'evaluer leur pertinence par apprentissage, ou avec le concours de l'expert
APA, Harvard, Vancouver, ISO, and other styles
6

Zhou, Chao Ying. "Effects of combination motions on cylinders in waves and currents." Thesis, Imperial College London, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339445.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Millán, Nebot Claudia Lucía. "Phase Combination and its Application to the Solution of Macromolecular Structures: Developing ALIXE and SHREDDER." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/663022.

Full text
Abstract:
Phasing X-ray data within the frame of the ARCIMBOLDO programs requires very accurate models and a sophisticated evaluation of the possible hypotheses. ARCIMBOLDO uses small fragments, that are placed with the maximum likelihood molecular replacement program Phaser, and are subject to density modification and autotracing with the program SHELXE. The software receives its name from the Italian painter Giuseppe Arcimboldo, who used to compose portraits out of common objects such as vegetables or flowers. Out of most possible arrangements of such objects, only a still-life will result, and just a few ones will truly produce a portrait. In a similar way, from all possible placements with small protein fragments, only a few will be correct and will allow to get the full “protein’s portrait”. The work presented in this thesis has explored new ways to exploit partial information and increase the signal in the process of phasing with fragments. This has been achieved through two main pieces of software, ALIXE and SHREDDER. With the spherical mode in ARCIMBOLDO_SHREDDER, the aim is to derive compact fragments starting from a distant homolog to our unknown protein of interest. Then, locations for these fragments are searched with Phaser. These include strategies for refining the fragments against the experimental data and giving them more degrees of freedom. With ALIXE, the aim is to combine information in reciprocal space from partial solutions, such as the ones produced by SHREDDER, and use the coherence between them to guide their merging and to increase the information content, so that the step of density modification and autotracing starts from a more complete solution. Even if partial solutions contain both correct and incorrect information, the combination of solutions that share some similarity will allow to get a better approximation to the correct structure. Both ARCIMBOLDO_SHREDDER and ALIXE have been used on test data for development and optimisation but also on datasets from previously unknown structures, which have been solved thanks to these programs. These programs are distributed through the website of the group but also through software suites of general use in the crystallographic community such as CCP4 and SBGrid.
APA, Harvard, Vancouver, ISO, and other styles
8

Cowtan, Kevin Douglas. "On the combination of small and macro molecule techniques for the phase refinement of macromolecular structures." Thesis, University of York, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304262.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Yavuzoglu, Asuman. "The Roles of Auditory Brainstem Structures in Analysis of Complex Sounds." Kent State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=kent1290538894.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Notaro, Anna. "Understanding the innovative viral glycosylation machinery using a combination of chemical and structural methodologies." Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0125.

Full text
Abstract:
The sujet de cette these portait sur la caractérisation de la machinerie originale utilisée par les Mimiviridae pour glycosyler les fibrilles entourant leurs capsides en travaillant sur les prototypes des 3 lignées connues, Mimivirus (A), Megavirus chilensis (B) et Moumouvirus australensis (C). Les fibrilles de Mimivirus sont décorées par 2 polysaccharides différents :l’un est caractérisé par la répétition d’un disaccaride linéaire fait de 3)-α-L-Rha-(1→3)-β-D-GlcNAc-(1→, avec un pyruvate branché en position 4,6 du GlcNAc ; l’autre présente une unité répétée branchée de séquence 2)-α-L-Rha-(1→3)-β-D-GlcNAc-(1→ pour le squelette linéaire et du rhamnose branché en position 3 par de 2OMeVioNAc. Nous avons suggéré que les fibrilles de Megavirus sont décorées par plus d'une espèce de polysaccharides/oligosaccharides, donc l’un ayant présentant un trisaccharide de RhaNAc:α-L-4OMe-RhaNAc-(1→3)-α-L-RhaNAc-(1→3)-α-L-RhaNAc-(1→. Les fibrilles de Moumouvirus sont décorées de glucosamine, quinovosamine et bacillosamine. A partir de ces données expérimentales il devenait possible de rechercher de nouveaux gènes responsables de ces glycosylations spécifiques. Le cluster de 9 gènes déjà publié de Mimivirus a pu être étendu à 13 gènes. Un cluster de 14 gènes a été d’autre part identifié dans le génome de Moumouvirus, le premier cluster de gènes de la glycosylation identifié dans la lignée B. Parmi les gènes de glycosylation, l’analyse fonctionnelle in vitro de la protéine L142 a permis de démontrer qu’il s’agit d’une N-acétyltransferase. En conclusion, les fibrilles des Mimiviridae sont lourdement glycosylées and le type de sucres et leur organisation dépend de la lignée considérée
The aim of this thesis is the study of the innovative glycosylation machinery used by the Mimiviridae family for the glycosylation of the fibrils sourrounding their capsid, using Mimivirus, Moumouvirus australensis and Megavirus chilensis as prototypes of lineages A, B and C, respectively. Mimivirus fibrils are decorated with two distinct polysaccharide: one is characterized by a linear disaccharide repeating unit made of 3)-α-L-Rha-(1→3)-α-D-GlcNAc-(1→, with a pyruvic acid branched at position 4,6 of GlcNAc.; the other has a branched repeating unit with the sequence 2)-α-L-Rha-(1→3)-β-D-GlcNAc-(1→ in the linear backbone and rhamnose further branched at position 3 by viosamine methylated at position 2 and acetylated at position 4. We suggested that Megavirus chiliensis fibrils are decorated by more than one polysaccharides/oligosaccharide species, one having this trisaccharide: α-L-4OMe-RhaNAc-(1→3)-α-L-RhaNAc-(1→3)-α-L-RhaNAc-(1→. Moumouvirus australensis fibrils are decorated with glucosamine and quinovosamine in addition to the rare sugar, bacillosamine. Starting from this experimental data, it was possible to identify new genes involved in glycosylation. As a result, the published nine-gene cluster of Mimivirus was extended to thirteen genes. A different cluster of fourteen genes was identified in Moumouvirus australensis, representing the first glycosylation gene cluster identified for the B lineage.Among the glycosylation genes, the function of L142 was investigated in vitro, demonstrating that it is an N-acetyltransferase. To conclude, the fibrils of Mimiviridae are heavily glycosylated and the type of sugars and their organization depends on their lineage
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Combination de structures conceptuelles"

1

Pascal, Hitzler, and Schärfe Henrik, eds. Conceptual structures in practice. Boca Raton, Fla: Taylor & Francis, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Hölzinger, Johannes Peter. Synthese des arts: Die Verbindung von Kunst und Architektur bei den Regierungsbauten auf der Hardthöhe in Bonn = The combination of architecture and art in the government buildings on the Hardthöhe in Bonn. Stuttgart: Edition A. Menges, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Ranzi, Gianluca, ed. Time-dependent behaviour and design of composite steel-concrete structures. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/sed018.

Full text
Abstract:
<p>Steel-concrete composite structures are widely used throughout the world for buildings and bridges. A distinguishing feature of this form of construction is the combination of concrete and steel components to achieve enhanced structural performance. <p>The time-dependent response of concrete and its infl uence on the service behaviour and design of composite structures are the main focus of this SED. For the fi rst time, a publication combines a state-of-the-art review of the research with the available design specifi cations of Europe, Australia and New Zealand, and USA. This publication intends to enhance the awareness of the service response of composite structures and of the latest research and standards’ developments. It is aimed at designers and researchers alike. <p>The review of research available in open literature is provided and arranged according to structural typologies, i. e. slabs, beams, and columns. It serves as background information for current service design rules and provides insight into the most recent research advancements. The review of available design guidelines presents the similarities and differences of the recommended service design procedures infl uenced by concrete time effects. Selected case studies of building and bridge projects show possible design approaches and the rationale required when dealing with the time-dependent response and design of composite structures. The authors of this publication are design engineers and academics involved in the service design and research on the time-dependent response of composite structures.
APA, Harvard, Vancouver, ISO, and other styles
4

Günther, Hans-Peter, ed. Use and Application of High-Performance Steels for Steel Structures. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2005. http://dx.doi.org/10.2749/sed008.

Full text
Abstract:
<p>New steel production processes have led to a remarkable improve­ment in steel products within the last few years, and now allows steels to be produced according to the desired mechanical and chemical properties. High-Performance Steel (HPS) is the designa­tion given to this new generation of steels that offer higher performance not only in terms of strength but also toughness, weld­ability, cold formability and corrosion resistance, compared to the traditionally used mild steel grades.</p> <p>The development of HPS goes with today's increased demand for slender lightweight structures, as for example in bridge design and the design of high-rise buildings, where there is a strong require­ment to use high-strength materials in combination with good execution and fabrication properties. However, on the structural engineering side there is a need for knowledge on these new steel grades, and quite often design codes do not provide sufficient information to fully exploit the advantageous properties of HPS.</p> <p>The present volume provides an overview of the development and application of HPS on an international level. This is done by giving information on, for example, the production process, the chemical and mechanical properties, the relevant design and fabrication standards and on recent research results. Approximately fifteen included examples of realised applications aim to provide detailed information based on existing technical solutions, and to point out the major benefits when using HPS in comparison to mild steels.</p> <p>The document is thus not a monograph but an assembly of contri­butions from different countries. lt is separated into chapters related to different countries, namely the USA, Canada, Japan and Europe, all of them providing a state-of-the-art report on HPS.</p>
APA, Harvard, Vancouver, ISO, and other styles
5

L, Commons Michael, and Symposium on Quantitative Analyses of Behavior. (8th : 1985 : Harvard University), eds. Computational and clinical approaches to pattern recognition and concept formation. Hillsdale, N.J: Lawrence Erlbaum Associates, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

L, Commons Michael, and Symposium on Quantitative Analyses of Behavior., eds. Behavioral approaches to pattern recognition and concept formation. Hillsdale, NJ: Erlbaum Associates, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Leonovich, Sergey, and Elena Sadovskaya. Technology and properties of fiber reinforced concrete with a nanomodified matrix. ru: INFRA-M Academic Publishing LLC., 2024. https://doi.org/10.12737/2085120.

Full text
Abstract:
The monograph substantiates the concept of multilevel reinforcement of structural heavy concrete, including the level of nano-, micro-reinforcement of cement stone with tubular carbon nanomaterials and macro-reinforcement of the concrete structure with steel fiber. Fiber-reinforced concrete compositions have been developed to determine the optimal content of steel fiber and carbon nanomaterial during monoarming, the properties of fiber-reinforced concrete of multilevel reinforcement with a combination of nano-, micro-reinforcement with tubular UNM and macro-reinforcement with steel fiber have been studied. A technique has been developed for a multiparametric assessment of the properties of fiber reinforced concrete of multilevel polydisperse reinforcement in order to determine strength, crack resistance and deformability in laboratory and building conditions. A set of technological measures for conducting concrete works with the preparation and use of fiber reinforced concrete of multilevel polydisperse reinforcement in the construction of monolithic building structures is proposed. A comprehensive methodology for assessing the quality of fiber concrete in building structures has been developed.
APA, Harvard, Vancouver, ISO, and other styles
8

Muhaev, Rashid. Anti-corruption policy. ru: INFRA-M Academic Publishing LLC., 2024. http://dx.doi.org/10.12737/2110963.

Full text
Abstract:
The textbook is designed to form a systematic understanding of corruption based on the analysis of foreign and domestic anti-corruption legislation, technologies and anti-corruption practices in different countries. The content of such a complex phenomenon as corruption is presented in a fascinating manner, thanks to an organic combination of theoretical and applied levels of analysis of corruption practices, forms of their manifestations in various spheres of public and private life. The specifics of national models of anti-corruption policy in different countries are revealed, the place and role of the state, civil society institutions, business structures and individuals in the mechanism of combating corruption are shown. Meets the requirements of the federal state educational standards of higher education of the latest generation. It is intended for students and postgraduates studying in the fields of training (specialties) "Political Science", "Sociology", "State and municipal administration". It is recommended for use in the process of training and retraining of managers and practitioners of federal, regional and municipal government bodies, university teachers.
APA, Harvard, Vancouver, ISO, and other styles
9

Keller, Thomas. Use of fibre reinforced polymers in bridge construction. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2003. http://dx.doi.org/10.2749/sed007.

Full text
Abstract:
<p>The aim of the present Structural Engineering Document, a state-of-the-art report, is to review the progress made worldwide in the use of fibre rein­forced polymers as structural components in bridges until the end of the year 2000.<p> Due to their advantageous material properties such as high specific strength, a large tolerance for frost and de-icing salts and, furthermore, short installation times with minimum traffic interference, fibre reinforced polymers have matured to become valuable alternative building materials for bridge structures. Today, fibre reinforced polymers are manufactured industrially to semi-finished products and ccimplete structural components, which can be easily and quickly installed or erected on site.<p> Examples of semi-finished products and structural components available are flexible tension elements, profiles stiff in bending and sandwich panels. As tension elements, especially for the purpose of strengthening, strips and sheets are available, as weil as reinforcing bars for concrete reinforcement and prestressing members for internal prestressing or external use. Profiles are available for beams and columns, and sandwich constructions especially for bridge decks. During the manufacture of the structural components fibre-optic sensors for continuous monitoring can be integrated in the materials. Adhesives are being used more and more for joining com­ponents.<p> Fibre reinforced polymers have been used in bridge construction since the mid-1980s, mostly for the strengthening of existing structures, and increas­ingly since the mid-1990s as pilot projects for new structures. In the case of new structures, three basic types of applications can be distinguished: concrete reinforcement, new hybrid structures in combination with traditional construction materials, and all-composite applications, in which the new materials are used exclusively.<p> This Structural Engineering Document also includes application and research recommendations with particular reference to Switzerland.<p> This book is aimed at both students and practising engineers, working in the field of fibre reinforced polymers, bridge design, construction, repair and strengthening.
APA, Harvard, Vancouver, ISO, and other styles
10

Hitzler, Pascal, and Henrik Scharfe. Conceptual Structures in Practice. Taylor & Francis Group, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Combination de structures conceptuelles"

1

Nicolini, Enrica, Christophe Ringeissen, and Michaël Rusinowitch. "Data Structures with Arithmetic Constraints: A Non-disjoint Combination." In Frontiers of Combining Systems, 319–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-04222-5_20.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Turkstra, Carl J. "Criteria for the Selection of Load Combination Factors." In Probabilistic Methods in the Mechanics of Solids and Structures, 587–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-82419-7_54.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Kriegel, Hans-Peter, Thomas Brinkhoff, and Ralf Schneider. "The combination of spatial access methods and computational geometry in geographic database systems." In Data structures and efficient algorithms, 70–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/3-540-55488-2_22.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Anjali, R., S. Anandha Kumar, Jaswanth Gangolu, and R. Abiraami. "Experimental Study on Self-Healing of Micro-Cracks in Concrete with Combination of Environmentally Friendly Bacteria." In Sustainable Structures and Buildings, 95–109. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-46688-5_7.

Full text
Abstract:
AbstractMicro-cracks in constructions are unavoidable due to freezing, thawing, and shrinkage in concrete, as well as when concrete is exposed to the seafloor, on offshore platforms, or in tunnels and sewage pipes. This exposure also has an impact on the durability and service life of concrete. Standard healing materials are not long-lasting and are difficult to mend fine cracks with. According to new research, bacterial concrete is an effective approach for repairing concrete and boosting its longevity. The problem has been reduced using calcite-producing microorganisms that do not pollute the environment and are sustainable to produce. In the presence of carbonate ions, bacteria release calcium precipitate, a process known as bio-calcification. This study includes four blends as (1) normal concrete, (2) Bacillus cereus with normal concrete, (3) Bacillus subtilis with normal concrete, and (4) combined cereus and subtilis with normal concrete. Blend 4 provided the lowest slump value of 70 mm, the highest splitting tensile strength of 2.83 MPa, and the highest flexural strength of 4.37 MPa. This combination was more sustainable and cost-effective because it used less water and cement. Blend 4’s self-healing ability was remarkable, as the microcracks were cured after 7 days. Similarly, Blend 3 had a higher compressive strength of 33 MPa.
APA, Harvard, Vancouver, ISO, and other styles
5

Li, Shuangping, Yonghua Li, Min Zheng, Jun Geng, Zuqiang Liu, and Bo Shi. "Research on Dam Deformation Monitoring Model Based on BP + SVM Optimal Weighted Combination." In Advances in Frontier Research on Engineering Structures, 313–23. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-8657-4_28.

Full text
Abstract:
AbstractIt is an important means to ensure the safe operation of dam to establish accurate and effective deformation monitoring data analysis and prediction model. In view of the complex conditions in dam safety monitoring, there are many unknown or uncertain factors, and they are difficult to have a single model to apply all problems. The optimal weighted combination method is constructed by combining neural network model and support vector machine model, which is used in the deformation monitoring analysis of concrete dam. The research shows that the prediction results of the optimal weighted combination model are highly consistent with the measured results, and have certain feasibility and practicability in the dam deformation monitoring work.
APA, Harvard, Vancouver, ISO, and other styles
6

Cousot, Patrick, Radhia Cousot, and Laurent Mauborgne. "The Reduced Product of Abstract Domains and the Combination of Decision Procedures." In Foundations of Software Science and Computational Structures, 456–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19805-2_31.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Cantagallo, Cristina, Francesco A. Pellegrini, Enrico Spacone, and Guido Camata. "Multidirectional Lateral Loads and Combination Rules in Pushover Analysis." In Seismic Behaviour and Design of Irregular and Complex Civil Structures IV, 249–59. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-83221-6_21.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

John, Leonard, Dina Becker, Steffen Reuter, Hans-Christian Möhring, Martin Doppelbauer, and Lars F. Berg. "Resource Efficient Manufacturing of Complex Cooling Structures." In Advances in Automotive Production Technology – Towards Software-Defined Manufacturing and Resilient Supply Chains, 307–13. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-27933-1_28.

Full text
Abstract:
AbstractThe combination of additive manufacturing (LPBF) and plastic injection molding offers great benefits for functional integration and thereby the functionality of parts, components and systems. By manufacturing cooling channels as very thin-walled structures, short laser processing time is needed to produce these parts. The combination with plastic overmolding allows the mechanical loads to be absorbed, while at the same time utilizing the freedom of shape of the LPBF process. In order to prevent the structures from collapsing during overmolding or to ensure that they do not have to be very thick-walled in order to withstand the high injection pressures, the structures are closed, so that the base-powder is still contained in the structure during the overmolding. After opening the overmolded components, the powder can be extracted and reused. This technique offers great potential for high functional integration and new possibilities in terms of realizing internal cooling structures of electric traction machines. Other advantages that can be exploited are the thermally good connection due to the material bond and the possibility of local reinforcement due to the design freedom of the insert. Thanks to the injection-molded component, complex geometries can also be produced without additional unit costs.
APA, Harvard, Vancouver, ISO, and other styles
9

Frost, Sarah, and Daniel Baier. "Combination of Distances and Image Features for Clustering Image Data Bases." In Data Science, Learning by Latent Structures, and Knowledge Discovery, 251–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44983-7_22.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Yi, Y. L., W. Y. Meng, N. N. Huo, and X. Ruan. "Mechanical performance of steel plate combination beam bridge with clustered shear studs considering slip effect." In Life-Cycle of Structures and Infrastructure Systems, 4057–64. London: CRC Press, 2023. http://dx.doi.org/10.1201/9781003323020-499.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Combination de structures conceptuelles"

1

Zhang, Bo, and Yong Zhang. "A 215-GHz Radial Power Combination System With Multilayer and Contactless Structures." In 2024 IEEE MTT-S International Wireless Symposium (IWS), 1–3. IEEE, 2024. http://dx.doi.org/10.1109/iws61525.2024.10713574.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Kuts, Roman I., Victor P. Korolkov, Dmitry A. Belousov, Alaxander R. Sametov, and Anatoly I. Malyshev. "Combination of phase and amplitude diffractive structures in computer-generated holograms for aspheric optical testing." In Optical Design and Testing XIV, edited by Rengmao Wu, Yongtian Wang, and Tina E. Kidger, 9. SPIE, 2024. http://dx.doi.org/10.1117/12.3036032.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Chen, Lin, Yi Zeng, Jingyu Ruan, Xing Wang, Ying Liu, and ChunHeng Liu. "Radiation Analysis of Electrically Large Structures Using a Combination of the Fast Dipole Method and the Physical Optics Approach." In 2024 International Applied Computational Electromagnetics Society Symposium (ACES-China), 1–2. IEEE, 2024. http://dx.doi.org/10.1109/aces-china62474.2024.10699755.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Yin, YueJun, Yue Li, and William M. Bulleit. "Simulation of Combination of Snow and Earthquake Hazards." In Structures Congress 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41031(341)314.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

McAllister, Therese P., and Bruce R. Ellingwood. "Load Combination Requirements in ASCE Standard 7-10: New Developments." In Structures Congress 2011. Reston, VA: American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/41171(401)124.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Kleemann, Bernd H., R. Arnold, and J. Ruoff. "Combination of blazed and laterally blazed structures." In Diffractive Optics and Micro-Optics. Washington, D.C.: OSA, 2004. http://dx.doi.org/10.1364/domo.2004.dtuc7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Nemat-Nasser, Siavouche, and Yongxian Wu. "Tailoring actuation of ionic polymer metal composites through cation combination." In Smart Structures and Materials, edited by Yoseph Bar-Cohen. SPIE, 2003. http://dx.doi.org/10.1117/12.484439.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Shin, Yung S., Booki Kim, and Alexander J. Fyfe. "Load Combination for Fatigue Analysis of Ship Structures." In ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/omae2004-51582.

Full text
Abstract:
A methodology for calculating the correlation factors to combine the long-term dynamic stress components of ship structure from various loads in seas is presented. The methodology is based on a theory of a stationary ergodic narrow-banded Gaussian process. The total combined stress in short-tem sea states is expressed by linear summation of the component stresses with the corresponding combination factors. This expression is proven to be mathematically exact when applied to a single random sea. The long-term total stress is similarly expressed by linear summation of component stresses with appropriate combination factors. The stress components considered here are due to wave-induced vertical bending moment, wave-induced horizontal bending moment, external wave pressure and internal tank pressure. For application, the stress combination factors are calculated for longitudinal stiffeners in cargo and ballast tanks of a crude oil tanker at midship section. It is found that the combination factors strongly depend on wave heading and period in the short-term sea states. It is also found that the combination factors are not sensitive to the selected probability of exceedance level of the stress in the long-term sense.
APA, Harvard, Vancouver, ISO, and other styles
9

Torng, T., G. Funk, and R. Stephenson. "Probabilistic on-orbit loads combination assessment." In 40th Structures, Structural Dynamics, and Materials Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1999. http://dx.doi.org/10.2514/6.1999-1576.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Gassmann, Stefan, Antonio Luque, F. Perdigones, J. M. Quero, and Lienhard Pagel. "Sensor structures generated with combination of SU8 and PCBMEMS." In IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2013. http://dx.doi.org/10.1109/iecon.2013.6699119.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Combination de structures conceptuelles"

1

Patel, Reena, David Thompson, Guillermo Riveros, Wayne Hodo, John Peters, and Felipe Acosta. Dimensional analysis of structural response in complex biological structures. Engineer Research and Development Center (U.S.), July 2021. http://dx.doi.org/10.21079/11681/41082.

Full text
Abstract:
The solution to many engineering problems is obtained through the combination of analytical, computational and experimental methods. In many cases, cost or size constraints limit testing of full-scale articles. Similitude allows observations made in the laboratory to be used to extrapolate the behavior to full-scale system by establishing relationships between the results obtained in a scaled experiment and those anticipated for the full-scale prototype. This paper describes the application of the Buckingham Pi theorem to develop a set of non-dimensional parameters that are appropriate for describing the problem of a distributed load applied to the rostrum of the paddlefish. This problem is of interest because previous research has demonstrated that the rostrum is a very efficient structural system. The ultimate goal is to estimate the response of a complex, bio-inspired structure based on the rostrum to blast load. The derived similitude laws are verified through a series of numerical experiments having a maximum error of 3.39%.
APA, Harvard, Vancouver, ISO, and other styles
2

Huijser, Marcel, E. R. Fairbank, and K. S. Paul. Best Practices Manual to Reduce Animal-Vehicle Collisions and Provide Habitat Connectivity for Wildlife. Nevada Department of Transportation, September 2022. http://dx.doi.org/10.15788/ndot2022.2.

Full text
Abstract:
The goal for this manual is to provide practical information for the implementation of mitigation measures that aim to: 1. Improve human safety through reducing collisions with large animals, including large wild mammal species, select free roaming large feral species, and select free roaming large livestock species, and 2. Improve or maintain habitat connectivity for terrestrial wildlife species and selected feral species through safe crossing opportunities. This manual does not include all possible measures that can or may reduce animal-vehicle collisions and maintain or improve habitat connectivity for wildlife. The measures included in this manual are: Barriers (fences) in combination with crossing structures (for large wild mammals and for small wild animal species), roadside animal detection system, Barriers (fences), Barriers (fences) in combination with crossing structures (for free roaming livestock), and culling, relocation, anti-fertility treatment, roadside animal detection systems, barriers (fences), and barriers (fences) in combination with crossing structures (for large feral mammal species such as feral horses and burros).
APA, Harvard, Vancouver, ISO, and other styles
3

Huijser, M. P., Robert J. Ament, M. Bell, A. P. Clevenger, E. R. Fairbank, K. E. Gunson, and T. McGuire. Animal Vehicle Collision Reduction and Habitat Connectivity Pooled Fund Study – Literature Review. Nevada Department of Transportation, December 2021. http://dx.doi.org/10.15788/ndot2021.12.

Full text
Abstract:
This report contains a summary of past research and new knowledge about the effectiveness of mitigation measures aimed at reducing animal-vehicle collisions and at providing safe crossing opportunities for wildlife. The measures are aimed at terrestrial large bodied wild mammal species, free roaming large livestock species (e.g. cattle, horses), free roaming large feral species (e.g. “wild” horses and burros), and small animal species (amphibians, reptiles, and small mammals). While mitigation is common, it is best to follow a three-step approach: avoidance, mitigation, and compensation or “off-site” mitigation. If reducing collisions with large wild mammals is the only objective, the most effective measures include roadside animal detection systems, wildlife culling, wildlife relocation, anti-fertility treatments, wildlife barriers (fences),and wildlife fences in combination with wildlife crossing structures. If the objectives also include maintaining or improving connectivity for large wild mammals, then wildlife barriers (fences) in combination with wildlife crossing structures are most effective. Measures for large domestic mammal species are largely similar, though for free roaming livestock there are legal, moral and ethical issues. For small animal species, temporary or permanent road closure and road removal are sometimes implemented, but barriers in combination with crossing structures are the most common.
APA, Harvard, Vancouver, ISO, and other styles
4

Bailey Bond, Robert, Pu Ren, James Fong, Hao Sun, and Jerome F. Hajjar. Physics-informed Machine Learning Framework for Seismic Fragility Analysis of Steel Structures. Northeastern University, August 2024. http://dx.doi.org/10.17760/d20680141.

Full text
Abstract:
The seismic assessment of structures is a critical step to increase community resilience under earthquake hazards. This research aims to develop a Physics-reinforced Machine Learning (PrML) paradigm for metamodeling of nonlinear structures under seismic hazards using artificial intelligence. Structural metamodeling, a reduced-fidelity surrogate model to a more complex structural model, enables more efficient performance-based design and analysis, optimizing structural designs and ease the computational effort for reliability fragility analysis, leading to globally efficient designs while maintaining required levels of accuracy. The growing availability of high-performance computing has improved this analysis by providing the ability to evaluate higher order numerical models. However, more complex models of the seismic response of various civil structures demand increasing amounts of computing power. In addition, computational cost greatly increases with numerous iterations to account for optimization and stochastic loading (e.g., Monte Carlo simulations or Incremental Dynamic Analysis). To address the large computational burden, simpler models are desired for seismic assessment with fragility analysis. Physics reinforced Machine Learning integrates physics knowledge (e.g., scientific principles, laws of physics) into the traditional machine learning architectures, offering physically bounded, interpretable models that require less data than traditional methods. This research introduces a PrML framework to develop fragility curves using the combination of neural networks of domain knowledge. The first aim involves clustering and selecting ground motions for nonlinear response analysis of archetype buildings, ensuring that selected ground motions will include as few ground motions as possible while still expressing all the key representative events the structure will probabilistically experience in its lifetime. The second aim constructs structural PrML metamodels to capture the nonlinear behavior of these buildings utilizing the nonlinear Equation of Motion (EOM). Embedding physical principles, like the general form of the EOM, into the learning process will inform the system to stay within known physical bounds, resulting in interpretable results, robust inferencing, and the capability of dealing with incomplete and scarce data. The third and final aim applies the metamodels to probabilistic seismic response prediction, fragility analysis, and seismic performance factor development. The efficiency and accuracy of this approach are evaluated against existing physics-based fragility analysis methods.
APA, Harvard, Vancouver, ISO, and other styles
5

Lowney, Martin S., Scott F. Beckerman, Scott C. Barras, and Thomas W. Seamans. Gulls. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, May 2018. http://dx.doi.org/10.32747/2018.7208740.ws.

Full text
Abstract:
Abundant gull populations in North America have led to a variety of conflicts with people. Gulls cause damage at aquaculture facilities and other properties, and often collide with aircraft. Their use of structures on and near water results in excessive amounts of bird droppings on boats and docks. Their presence near outdoor dining establishments, swimming beaches, and recreational sites can lead to negative interactions with people. Large amounts of gull fecal material pollutes water and beaches resulting in drinking water contamination and swim bans. A combination of dispersal techniques, exclusion and limited lethal control may reduce damage to an acceptable level. Gulls are classified as a migratory bird species and are protected by federal and, in most cases, state laws. In the United States, gulls may be taken only with a permit issued by the U.S. Fish and Wildlife Service. Occasionally, an additional permit is required from the state wildlife management agency.
APA, Harvard, Vancouver, ISO, and other styles
6

Huijser, M. P., and S. C. Getty. Electrified Barriers Installed on Top of Wildlife Guards to Help Keep Large Wild Mammals Out of a Fenced Road Corridor. Western Transportation Institute, December 2023. http://dx.doi.org/10.15788/1702675805.

Full text
Abstract:
Most wildlife mitigation measures along highways are aimed at improving human safety, reducing direct wildlife mortality, and providing safe crossing opportunities for wildlife. Fences in combination with wildlife crossing structures are the most effective combination of mitigation measures to achieve these objectives. For fences to reliably reduce collisions with large wild mammals by 80% or more, at least 5 kilometers (3 miles) of road length needs to be fenced, including a buffer zone that extends well beyond the known hotspots for wildlife-vehicle collisions. Collisions that still occur within the fenced road sections tend to be concentrated near the fence-ends. In addition, gaps in fences, including at access roads, can result in concentrations of collisions inside fenced road sections. Gates are commonly used at gaps in the fence at low traffic volume access roads, but they are often left open allowing wildlife to access the road corridor. While cattle guards or wildlife guards can be effective for some ungulate species, double wide cattle or wildlife guards consisting of round bars or bridge grate material, situated above a pit, are generally recommended for ungulates. However, such guards are not a substantial barrier for species with paws, including many carnivore species. Electrified mats or electrified guards can be a barrier for both ungulates and species with paws, but to prevent animals from jumping across the mat, they need to be 4.6-6.6 m (15-22 ft)) wide. For this project, a combination of wildlife guards and electrified barriers on top of these wildlife guards was evaluated. Both electrified mats that were tested (Crosstek and BS Fabrications) on top of existing wildlife guards resulted in a near absolute barrier for both ungulates and species with paws (97.9% barrier for the 2 deer species combined, 100% barrier for coyotes and black bears); an improvement to a wildlife guard only without an electrified mat (89.3% for the 2 deer species combined, 54.5% barrier for coyotes and 45.5% barrier for black bears). Based on the images, there is evidence that a shock is delivered to the animals that touch the electrified mats and that most of the animals respond by returning to the habitat side of the barrier. Specifically for bears, if it was not for the electrified barriers, likely at least 3 black bears and 1 grizzly bear would have crossed into the fenced road corridor where they would have been exposed to vehicles.
APA, Harvard, Vancouver, ISO, and other styles
7

JINGTING, ZHANG. Further development of innovative applications based on the inverse piezoelectric effect. Intellectual Archive, March 2024. http://dx.doi.org/10.32370/iaj.3051.

Full text
Abstract:
As practice has shown, piezoelectric motors based on the principles of the inverse piezoelectric effect can become the basis for the latest automation systems and precision mechanics, as well as innovative lighting technology; The main interest of developers of our company is the possibility of building on the basis of the inverse piezoelectric effect of systems and configurations related to the systems of precision and small-sized stepper motors As the requirements for accuracy and weight reduction of such engines become stricter, including by reducing overall dimensions, more and more variants and technical solutions based on the complex application of special composite materials are offered as a base material for building elements and structures of such engines. In modern electronic equipment, especially mass-produced, it is extremely important to correctly determine the initial technical requirements for the product, which in the process of production and operation should allow to carry out innovative modification of the product without changing the fundamental basis of its design, circuit solutions and combination of materials and component parts.
APA, Harvard, Vancouver, ISO, and other styles
8

Huang, Cihang, Yen-Fang Su, and Na Lu. Self-Healing Cementitious Composites (SHCC) with Ultrahigh Ductility for Pavement and Bridge Construction. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317403.

Full text
Abstract:
Cracks and their formations in concrete structures have been a common and long-lived problem, mainly due to the intrinsic brittleness of the concrete. Concrete structures, such as rigid pavement and bridge decks, are prone to deformations and deteriorations caused by shrinkage, temperature fluctuation, and traffic load, which can affect their service life. Rehabilitation of concrete structures is expensive and challenging—not only from maintenance viewpoints but also because they cannot be used for services during maintenance. It is critical to significantly improve the ductility of concrete to overcome such issues and to enable better infrastructure quality. To this end, the self-healing cementitious composites (SHCC) investigated in this work could be a promising solution to the aforementioned problems. In this project, the team has designed a series of cementitious composites to investigate their mechanical performances and self-healing abilities. Firstly, various types of fibers were investigated for improving ductility of the designed SHCC. To enhance the self-healing of SHCC, we proposed and examined that the combination of the internal curing method with SHCC mixture design can further improve self-healing performance. Three types of internal curing agents were used on the SHCC mixture design, and their self-healing efficiency was evaluated by multiple destructive and non-destructive tests. Results indicated a significant improvement in the self-healing capacity with the incorporation of internal curing agents such as zeolite and lightweight aggregate. To control the fiber distribution and workability of the SHCC, the mix design was further adjusted by controlling rheology using different types of viscosity modifiers. The team also explored the feasibility of the incorporation of colloidal nano-silica into the mix design of SHCC. Results suggest that optimum amounts of nano-silica have positive influence on self-healing efficiency and mechanical properties of the SHCC. Better hydration was also achieved by adding the nano-silica. The bonding strength of the SHCC with conventional concrete was also improved. At last, a standardized mixing procedure for the large scale SHCC was drafted and proposed.
APA, Harvard, Vancouver, ISO, and other styles
9

Kerber, Steve, and Robin Zevotek. Fire Service Summary Report: Study of Residential Attic Fire Mitigation Tactics and Exterior Fire Spread Hazards on Firefighter Safety. UL Firefighter Safety Research Institute, November 2014. http://dx.doi.org/10.54206/102376/pxtq2256.

Full text
Abstract:
Attic fires pose many hazards for the fire service. When a fire occurs in an attic, it is common it goes unnoticed/reported until smoke or flames are visible from the outside of the structure. Because they take longer to detect, attic fires are more dangerous for firefighters and residents. In a fire situation, the attic ventilation system, which is designed to reduce moisture accumulation by drawing fresh air low from the eaves and exhausting moisture laden warm air near the peak, create an optimal fire growth and spread situation by supplying oxygen to the fire and exhausting hot gases. An estimated 10,000 residential attic fires are reported to U.S. fire departments each year and cause an estimated 30 civilian deaths, 125 civilian injuries and $477 million in property loss. The location of the attic creates several difficulties for the fire service. Firefighters must decide whether to fight the fire from inside the structure, from the outside or a combination of the two. This the decision is complicated by the constant hazard of ceiling collapse, which has the potential to rapidly deteriorate conditions in the living spaces. A piece of gypsum board may fall or be pulled from the ceiling making the relatively clear and cool conditions in the living space change very quickly endangering firefighters executing a search and rescue operation as part of their life safety mission. Further complicating the decision are the hazards associated with roof structure collapse, creating deadly conditions for firefighters operating on and under the roof. Structural collapse accounted for 180 firefighter deaths between 1979 and 2002 of which one-third occurred in residential structures . Many of these incidents involved a roof falling on firefighters or firefighters falling through the roof during firefighting operations on attic fires. The purpose of this study is to increase firefighter safety by providing the fire service with scientific knowledge on the dynamics of attic and exterior fires and the influence of coordinated fire mitigation tactics from full-scale fire testing in realistic residential structures.
APA, Harvard, Vancouver, ISO, and other styles
10

Kerber, Steve, and Robin Zevotek. Study of Residential Attic Fire Mitigation Tactics and Exterior Fire Spread Hazards on Firefighter Safety Released. UL Firefighter Safety Research Institute, November 2014. http://dx.doi.org/10.54206/102376/lihb1439.

Full text
Abstract:
Attic fires pose many hazards for the fire service. When a fire occurs in an attic, it is common it goes unnoticed/reported until smoke or flames are visible from the outside of the structure. Because they take longer to detect, attic fires are more dangerous for firefighters and residents. In a fire situation, the attic ventilation system, which is designed to reduce moisture accumulation by drawing fresh air low from the eaves and exhausting moisture laden warm air near the peak, create an optimal fire growth and spread situation by supplying oxygen to the fire and exhausting hot gases. An estimated 10,000 residential attic fires are reported to U.S. fire departments each year and cause an estimated 30 civilian deaths, 125 civilian injuries and $477 million in property loss. The location of the attic creates several difficulties for the fire service. Firefighters must decide whether to fight the fire from inside the structure, from the outside or a combination of the two. This the decision is complicated by the constant hazard of ceiling collapse, which has the potential to rapidly deteriorate conditions in the living spaces. A piece of gypsum board may fall or be pulled from the ceiling making the relatively clear and cool conditions in the living space change very quickly endangering firefighters executing a search and rescue operation as part of their life safety mission. Further complicating the decision are the hazards associated with roof structure collapse, creating deadly conditions for firefighters operating on and under the roof. Structural collapse accounted for 180 firefighter deaths between 1979 and 2002 of which one-third occurred in residential structures . Many of these incidents involved a roof falling on firefighters or firefighters falling through the roof during firefighting operations on attic fires. The purpose of this study is to increase firefighter safety by providing the fire service with scientific knowledge on the dynamics of attic and exterior fires and the influence of coordinated fire mitigation tactics from full-scale fire testing in realistic residential structures.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Combination de structures conceptuelles' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography