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Articles de revues sur le sujet "Dimension du contact":
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McNevin, S. C., et M. Cerullo. « Contact etch scaling with contact dimension ». Journal of Vacuum Science & ; Technology A : Vacuum, Surfaces, and Films 16, no 3 (mai 1998) : 1514–18. http://dx.doi.org/10.1116/1.581179.
Liou, J. L., et J. F. Lin. « A Microcontact Model Developed for Asperity Heights with a Variable Profile Fractal Dimension, A Surface Fractal Dimension, Topothesy, and Non-Gaussian Distribution ». Journal of Mechanics 25, no 1 (mars 2009) : 103–15. http://dx.doi.org/10.1017/s1727719100003646.
AbstractThe cross sections formed by the contact asperities of two rough surfaces at an interference are islandshaped, rather than having the commonly assumed circular contour. These island-shaped contact surface contours show fractal behavior with a profile fractal dimension Ds. The surface fractal dimension for the asperity heights is defined as D and the topothesy is defined as G. In the study of Mandelbrot, the relationship between D and Ds was given as D = Ds + 1 if these two fractal dimensions are obtained before contact deformation. In the present study, D, G, and Ds are considered to be varying with the mean separation (or the interference at the rough surface) between two contact surfaces. The D-Ds relationships for the contacts at the elastic, elastoplastic, and fully plastic deformations are derived and the inceptions of the elastoplastic deformation regime and the fully plastic deformation regime are redefined using the equality of two expressions established in two different ways for the number of contact spots (N). The contact parameters, including the total contact force and the real contact area, were evaluated when the size distribution functions (n) for the three deformation regimes were available. The results indicate that both the D and Ds parameters in these deformation regimes increased with increasing the mean separation (d*). The initial plasticity index before contact deformation (ψ)0 is also a factor of importance to the predictions of the contact load (F*t) and contact area (At*) between the model of variable D and G, non-Gaussian asperity heights and circular contact area and the present model of variable D and G, non-Gaussian asperity heights and fractal contact area.
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Liu, Kaian, Yingqiang Xu, Zhenghai Wu et Li Xiao. « Evolution Behavior Analysis of Normal Contact Stiffness of Fractal Surface under Loading and Unloading ». Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 38, no 6 (décembre 2020) : 1188–97. http://dx.doi.org/10.1051/jnwpu/20203861188.
In order to analyze the evolution of normal contact stiffness under loading and unloading, an accurate elastic-plastic contact finite element model between rigid plane and fractal surface is established by introducing the equivalent metal matrix deformation in terms of the modified Weierstrass-Mandelbrot function. The effects of the fractal dimension, scale parameter, material properties on the normal contact stiffness were discussed. A method for evaluating the normal contact stiffness was proposed to analyze the evolution of the normal contact stiffness. Numerical simulation shows that there is a positive power function relationship between the normal contact stiffness and the load of fractal surface. Under the same load, at the fractal dimensions (D) of 2.4-2.7 and scale parameters (G) of 1.36×10-13-1.36×10-10 m, the loading normal contact stiffness increases with the increasing of fractal dimension and tangent modulus, but decreases with the increasing of scale parameter. The unloading normal contact stiffness increases with the material strengthening, and the variation amplitude is positively correlated with the fractal dimension, and negatively correlated with the scale parameters and tangent modulus.
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Budhraja, Vinay, Srinivas Devayajanam et Prakash Basnyat. « Simulation Results : Optimization of Contact Ratio for Interdigitated Back-Contact Solar Cells ». International Journal of Photoenergy 2017 (2017) : 1–10. http://dx.doi.org/10.1155/2017/7818914.
In the fabrication of interdigitated back contact (IBC) solar cells, it is very important to choose the right size of contact to achieve the maximum efficiency. Line contacts and point contacts are the two possibilities, which are being chosen for IBC structure. It is expected that the point contacts would give better results because of the reduced recombination rate. In this work, we are simulating the effect of contact size on the performance of IBC solar cells. Simulations were done in three dimension using Quokka, which numerically solves the charge carrier transport. Our simulation results show that around 10% of contact ratio is able to achieve optimum cell efficiency.
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Shi, Li Wan, Duan Yi Wang, Julius Masley et Shu Wen Zhang. « Comparison Analysis of the Aggregate Contact Characteristics between Skeleton-Dense and Suspended-Dense Structure Asphalt Mixture ». Applied Mechanics and Materials 470 (décembre 2013) : 889–92. http://dx.doi.org/10.4028/www.scientific.net/amm.470.889.
The contact between aggregates is an important feature of asphalt mixture skeleton. By comparing skeleton-dense and suspended-dense structure asphalt mixture test results, this paper studied the distribution characteristics of coarse aggregate contacts by using two-dimension digital image processing technique. The results indicate that skeleton-dense asphalt mixture has more homogeneous distribution of contact points, and a relatively stable skeleton structure than suspended-dense mixture. In two-dimension image, homogeneous distribution of contact points and little unrestrained coarse aggregates are two evident characteristics of asphalt mixture with good rutting resistance. The rutting resistance of asphalt mixture has no correlation with contact points, but is related to the spatial distribution of the contact points.
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Chacón-Cuberos, Ramón, Félix Zurita-Ortega, Eduardo García-Marmol et Manuel Castro-Sánchez. « Autoconcepto multidimensional según práctica deportiva en estudiantes universitarios de Educación Física de Andalucía (Multidimensional self-concept depending on sport practice in university students of Physical Education from Andalucía) ». Retos, no 37 (3 août 2019) : 174–80. http://dx.doi.org/10.47197/retos.v37i37.71861.
El presente estudio se realiza en una muestra de 775 estudiantes universitarios que cursan la mención en Educación Física (EF) del Grado en Educación Primaria en la comunidad autónoma de Andalucía. Se pretende analizar las diferentes dimensiones del autoconcepto en base al tipo de deporte practicado y la frecuencia de práctica de Actividad Física (AF) en una muestra de futuros docentes en EF. Como principales instrumentos se emplean los cuestionarios Autoconcepto Forma-5 y PAQ-A. Los resultados muestran que los jóvenes que poseen un mayor autoconcepto general son los que practican deportes colectivos sin contacto. En relación al autoconcepto social, se observó que los participantes que practicaban deportes colectivos sin contacto obtenían las puntuaciones más elevadas, dándose la misma tendencia en la dimensión familiar del autoconcepto. Para la dimensión emocional son los estudiantes que practican deportes colectivos con contacto los que reflejan las mayores puntuaciones, observándose la misma tendencia para el autoconcepto físico. En relación al nivel de práctica de AF, se ha demostrado que aquellos estudiantes que practican deportes individuales con contacto son los que muestran la mayor frecuencia. Asimismo, poseer un mayor autoconcepto físico, social y emocional se asociaba a mayores niveles de práctica de AF.Abstract. The present study was carried out in a sample of 775 university students who attend the Physical Education in Primary Education degree from the Autonomous Community of Andalusia. It aims to analyse the different dimensions of self-concept based on the type of sport practiced and the frequency of Physical Activity in a sample of future teachers in Physical Education. The instruments used were the Self-concept Form-5 and PAQ-A questionnaires. The results show that respondents who have a greater general self-concept are those who practice collective sports without contact. Regarding social self-concept, the participants who practiced collective sports without contact obtained the highest scores, the same tendency being observed in the family dimension of self-concept. Regarding the emotional dimension, students who practice collective sports with contact display the highest scores, the same tendency being observed in physical self-concept. In relation to physical activity levels, students who practice individual sports with contact show the highest frequency. Moreover, having a greater physical, social, and emotional self-concept was associated with higher levels of physical activity.
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Kokoszka, Andrzej. « The Axiological Dimension of Psychiatric Contact ». Psychiatry 54, no 4 (novembre 1991) : 404–12. http://dx.doi.org/10.1080/00332747.1991.11024569.
Li, Tian-Jun, et Cheuk Yu Mak. « The Kodaira Dimension of Contact 3-Manifolds and Geography of Symplectic Fillings ». International Mathematics Research Notices 2020, no 17 (24 juillet 2018) : 5428–49. http://dx.doi.org/10.1093/imrn/rny166.
Abstract We introduce the Kodaira dimension of contact 3-manifolds and establish some basic properties. Contact 3-manifolds with distinct Kodaira dimensions behave differently when it comes to the geography of various kinds of symplectic fillings. On the other hand, we also prove that, given any contact 3-manifold, there is a lower bound of $2\chi +3\sigma $ for all of its minimal symplectic fillings. This is motivated by Stipsicz’s result in [38] for Stein fillings. Finally, we discuss various aspects of exact self-cobordisms of fillable contact 3-manifolds.
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Francis, Mathew C., et Daniel Gonçalves. « Dushnik-Miller dimension of contact systems of d-dimensional boxes ». Electronic Notes in Discrete Mathematics 61 (août 2017) : 467–73. http://dx.doi.org/10.1016/j.endm.2017.06.075.
Koert, Otto van. « Open books for contact five-manifolds and applications of contact homology ». [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=976606925.
Ce travail concerne le problème de prolongements et de classification des structures de contact invariantes sur les fibrés principaux en cercles de dimension trois. On montre qu'il existe sur un tel fibré une forme de contact invariante induisant une forme invariante donnée sur une surface invariante plongée, si et seulement si elle ne s'annule pas simultanément avec sa différentielle. D'autre part, on définit un invariant réel associé à une structure de contact régulière définie au voisinage du bord d'une variété connexe de dimensions trois, et on montre que la non-nullité de cet invariant réel est la condition nécessaire et suffisante pour pouvoir prolonger la structure sur toute la variété en une structure de contact régulière
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Massot, Patrick. « Sur quelques aspects riemanniens des structures de contact en dimension trois ». Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2008. http://tel.archives-ouvertes.fr/tel-00347962.
Cette thèse aborde l'étude de quelques propriétés riemanniennes des structures de contact en dimension trois et de leurs relations avec la topologie de ces structures. Dans la première partie on décrit diverses notions de courbure de champs de plans sur des variétés riemanniennes de dimension trois en comparant plusieurs approches préexistantes mais souvent mal connues. Dans la deuxième partie on présente les techniques topologiques d'étude des structures de contact en dimension trois. Enfin la troisième partie, qui rassemble l'essentiel des résultats nouveaux de cette thèse, est une étude des structures de contact géodésibles en dimension trois à l'aide des outils présentés dans la deuxième partie.
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Massot, Patrick. « Sur quelques propriétés riemanniens des structures de contact en dimension trois ». Lyon, École normale supérieure (sciences), 2008. http://www.theses.fr/2008ENSL0498.
Cette thèse aborde l'étude de quelques propriétés riemanniennes des structures de contact en dimension trois et de leurs relations avec la topologie de ces structures. Dans la première partie on décrit diverses notions de courbure de champs de plans sur des variétés riemanniennes de dimension trois en comparant plusieurs approches préexistantes mais souvent mal connues. Dans la deuxième partie on présente les techniques topologiques d'étude des structures de contact en dimension trois. Enfin la troisième partie, qui rassemble l'essentiel des résultats nouveaux de cette thèse, est une étude des structures de contact géodésibles en dimension trois à l'aide des outils présentés dans la deuxième partie This thesis study some riemannian properties of contact structures on 3--manifolds and their relationship with the topology of such structures. In the first part we describe various notions of curvature of plane fields on riemannian 3--manifolds by comparing several not well known approaches. In the second part we describe the topological techniques applied to the study of contact structures on 3--manifolds. The third part, which contains most of the new results of this thesis, is a study of geodesible contact structures on 3--manifolds using the tools described in the second part
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Colin, Vincent. « Sur la stabilite, l'existence et l'unicite des structures de contact en dimension trois ». Lyon, École normale supérieure (sciences), 1998. http://www.theses.fr/1998ENSL0096.
On demontre dans un premier temps que sur une variete fermee de dimension trois, deux structures de contact c#0-proches sont isotopes. On etudie ensuite le comportement des structures de contact tendues vis-a-vis d'operations de chirurgie le long de surfaces. On prouve ainsi que toute variete obtenue par chirurgie d'indice un sur une variete de contact tendue est naturellement une variete de contact tendue. On montre alors que lorsqu'on recolle deux varietes de contact tendues de dimension 3 le long de deux tores incompressibles, la variete resultante est tendue pourvu que les structures de depart soient universellement tendues et les tores quasi pre-lagrangiens. De plus, on construit un exemple qui montre que sans cette derniere hypothese, la nouvelle variete peut etre vrillee. En guise d'application, on combine ces techniques de chirurgie avec un resultat recent de y. Eliashberg et w. Thurston pour construire une structure de contact tendue sur une nouvelle classe de spheres d'homologie toroidales. On obtient pour conclure un resultat de chirurgie pour toutes les surfaces a bord. Dans la derniere partie, on demontre que la torsion, un invariant introduit par e. Giroux et associe a toute classe d'isotopie de plongements du tore : t#2 v dans une variete de contact (v,), est finie pour peu que la structure soit universellement tendue et que satisfasse a une condition raisonnable. Ce resultat permet de construire de nombreux exemples de varietes qui admettent une infinite de structures de contact tendues deux a deux non isotopes.
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Colin, Vincent. « Sur la géometrie des structures de contact en dimension trois : stabilité, flexibilité et finitude ». Habilitation à diriger des recherches, Université de Nantes, 2002. http://tel.archives-ouvertes.fr/tel-00002138.
Kudawoo, Ayaovi Dzifa. « Problèmes industriels de grande dimension en mécanique numérique du contact : performance, fiabilité et robustesse ». Phd thesis, Université de Provence - Aix-Marseille I, 2012. http://tel.archives-ouvertes.fr/tel-00773642.
Ce travail de thèse concerne la mécanique numérique du contact entre solides déformables. Il s'agit de contribuer à l'amélioration de la performance, de la fiabilité et de la robustesse des algorithmes et des modèles numériques utilisés dans les codes éléments finis en particulier Code_Aster qui est un code libre développé par Électricité De France (EDF) pour ses besoins en ingénierie. L'objectif final est de traiter les problèmes industriels de grande dimension avec un temps de calcul optimisé. Pour parvenir à ces objectifs, les algorithmes et formulations doivent prendre en compte les difficultés liées à la mécanique non régulière à cause des lois de Signorini-Coulomb ainsi que la gestion des non linéarités dûes aux grandes déformations et aux comportements des matériaux étudiés. Le premier axe de ce travail est dédié à une meilleure compréhension de la formulation dite de " Lagrangien stabilisé " initialement implémentée dans le code. Il a été démontré l'équivalence entre cette formulation et la formulation bien connue de " Lagrangien augmenté ". Les caractéristiques mathématiques liées aux opérateurs discrets ont été précisées et une écriture énergétique globale a été trouvée. Une réflexion a été mise en oeuvre en vue de renforcer de manière faible la condition cinématique sur la normale dans la zone de contact via les techniques d'optimisation sans contraintes. La nouvelle formulation est dite de " Lagrangien augmenté non standard ". Trois nouvelles stratégies basées sur le Lagrangien augmenté ont été implémentées. Il s'agit de la méthode de Newton généralisée : c'est une méthode d'optimisation qui permet de résoudre toutes les non linéarités du problème en une seule boucle d'itérations. La méthode de Newton partielle est une méthode hybride entre la méthode historique du code appelée méthode de point fixe et la méthode de Newton généralisée. Enfin, on a mis en place une façon originale de traiter le cyclage : ce phénomène apparaît souvent au cours de la résolution du problème et il entraîne la perte de convergence des algorithmes. La stratégie nouvelle permet d'améliorer la robustesse des algorithmes.
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Wang, Jing. « Sub-Riemannian heat kernels on model spaces and curvature-dimension inequalities on contact manifolds ». Thesis, Purdue University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3636683.
This dissertation contains two research directions.
In the first direction, we deduce explicit expressions of the subelliptic heat kernels on three sub-Riemannian model spaces: the Cauchy-Riemann sphere, the anti-de Sitter space and the Quaternionic sphere. From these explicit subelliptic heat kernels we then derive several by products: the Green function of the conformal sub-Laplacian, the small-time estimates of the subel- liptic heat kernels, and the sub-Riemannian distance. The key point is to work in cylindrical coordinates that reflect the symmetries coming from the Hopf fibration of these model spaces.
In the second direction we study the extension of the Baudoin-Garofalo type curvature dimension inequality from the sub-Riemannian transversal symmetric setting to any contact manifold. In particular, the Sasakian condition is no longer assumed which leads to the appearance of new strongly non-linear term in the curvature dimension inequality. This new curvature dimension condition is then used to study several interesting aspects in geometry and analysis: The stochastic completeness of the heat semigroup, geometric conditions ensuring the compactness of the underlying manifold (Bonnet-Myers type results), gradient bounds for the heat semigroup, and spectral gap estimates for the sub-Laplacian.
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Kudawoo, Ayaovi Dzifa. « Problèmes industriels de grande dimension en mécanique numérique du contact : performance, fiabilité et robustesse ». Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4771/document.
Ce travail de thèse concerne la mécanique numérique du contact entre solides déformables. Il s'agit de contribuer à l'amélioration de la performance, de la fiabilité et de la robustesse des algorithmes et des modèles numériques utilisés dans les codes éléments finis en particulier Code_Aster qui est un code libre développé par Électricité De France (EDF) pour ses besoins en ingénierie. L'objectif final est de traiter les problèmes industriels de grande dimension avec un temps de calcul optimisé. Pour parvenir à ces objectifs, les algorithmes et formulations doivent prendre en compte les difficultés liées à la mécanique non régulière à cause des lois de Signorini-Coulomb ainsi que la gestion des non linéarités dûes aux grandes déformations et aux comportements des matériaux étudiés.Le premier axe de ce travail est dédié à une meilleure compréhension de la formulation dite de « Lagrangien stabilisé » initialement implémentée dans le code. Il a été démontré l'équivalence entre cette formulation et la formulation bien connue de « Lagrangien augmenté ». Les caractéristiques mathématiques liées aux opérateurs discrets ont été précisées et une écriture énergétique globale a été trouvée This work deals with computational contact mechanics between deformable solids. The aim of this work is to improve the performance, the reliability and the robustness of the algorithms and numerical models set in Code_Aster which is finite element code developped by Électricité De France (EDF) for its engineering needs. The proposed algorithms are used to solve high dimensional industrial problems in order to optimize the computational running times. Several solutions techniques are available in the field of computational contact mechanics but they must take into account the difficulties coming from non-smooth aspects due to Signorini-Coulomb laws coupled to large deformations of bodies and material non linearities. Firstly the augmented Lagrangian formulation so-called « stabilized Lagrangian » is introduced. Successively, the mathematical properties of the discrete operators are highlighted and furthermore a novel energetic function is presented. Secondly the kinematical condition with regard to the normal unknowns are reinforced through unconstrained optimization techniques which result to a novel formulation which is so-called « non standard augmented Lagrangian formulation ». Three types of strategies are implemented in the code. The generalized Newton method is developped : it is a method in which all the non linearities are solved in one loop of iterations. The partial Newton method is an hybrid technique between the generalized Newton one and a fixed point method
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Cartier, Sébastien. « Surfaces des espaces homogènes de dimension 3 ». Phd thesis, Université Paris-Est, 2011. http://tel.archives-ouvertes.fr/tel-00672332.
Ce mémoire porte sur l'étude des surfaces minimales et de courbure moyenne constante dans les espaces homogènes de dimension 3. Nous établissons les formules de Sym-Bobenko pour les surfaces de courbure moyenne constante 1/2 de H^2xR et minimales du groupe de Heisenberg, et donnons des exemples de construction de telles immersions par la méthode DPW. Nous montrons également que des propriétés de symétrie passent aux correspondances de type surfaces sœurs et cousines, ce qui entraîne l'existence de graphes entiers de courbure moyenne constante 1/2 à bout vertical dans H^2xR qui ne sont pas de révolution. Nous reprenons ensuite l'étude des bouts verticaux d'immersions de courbure moyenne constante 1/2 dans H^2xR. Nous munissons une famille de graphes entiers d'une structure de variété lisse et en déduisons un analogue pour H^2xR d'un théorème de A. E. Treibergs pour l'espace de Minkowski. Nous nous intéressons également aux déformations des anneaux de révolution. Une conséquence directe est l'existence d'anneaux immergés qui ne sont pas de révolution. Nous construisons notamment des anneaux dont les bouts n'ont pas le même axe. Enfin, nous décrivons les invariants de Nœther correspondant aux isométries des espaces homogènes pour les surfaces minimales et de courbure moyenne constante. Nous utilisons le formalisme de la géométrie de contact qui permet l'écriture de formules explicites en toute généralité, et nous étudions l'évolution des formes de Nœther sous l'action des isométries des espaces homogènes. Nous calculons ces invariants dans le cas des anneaux déformés de H^2xR, et dans celui des anneaux horizontaux du groupe de Heisenberg
Schwägerl, Christian. Language contact and displays of social identity : The communicative and ideological dimension of code-mixing in a business setting. Tübingen : Narr, 2010.
Alexandrov, V. M., et D. A. Pozharskii. Three-Dimensional Contact Problems. Dordrecht : Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-9893-9.
Siliquini-Cinelli, Luca, et Andrew Hutchison, dir. The Constitutional Dimension of Contract Law. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-49843-0.
Tripp, John H. Hertzian contact in two and three dimensions. [Washington, DC] : National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.
Chapitres de livres sur le sujet "Dimension du contact":
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Steiner, Erich. « Empirical studies of translations as a mode of language contact - "explicitness" of lexicogrammatical encoding as a relevant dimension ». Dans Language Contact and Contact Languages, 317–41. Amsterdam : John Benjamins Publishing Company, 2008. http://dx.doi.org/10.1075/hsm.7.18ste.
Djorić, Mirjana, et Masafumi Okumura. « Contact CR submanifolds of maximal CR dimension ». Dans CR Submanifolds of Complex Projective Space, 139–49. New York, NY : Springer New York, 2009. http://dx.doi.org/10.1007/978-1-4419-0434-8_21.
Geiges, Hansjörg. « Contact Topology in Dimension Greater than Three ». Dans European Congress of Mathematics, 535–45. Basel : Birkhäuser Basel, 2001. http://dx.doi.org/10.1007/978-3-0348-8266-8_46.
Cossart, Vincent, Uwe Jannsen et Shuji Saito. « Non-existence of Maximal Contact in Dimension 2 ». Dans Lecture Notes in Mathematics, 191–200. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52640-5_15.
Abrams, Jesse. « The Policy Context of the White Mountain Stewardship Contract ». Dans Human Dimensions of Ecological Restoration, 163–76. Washington, DC : Island Press/Center for Resource Economics, 2011. http://dx.doi.org/10.5822/978-1-61091-039-2_12.
Egger, Sebastian. « An Asymptotic Expansion of the Trace of the Heat Kernel of a Singular Two-particle Contact Interaction in One-dimension ». Dans Discrete and Continuous Models in the Theory of Networks, 127–52. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44097-8_6.
Monateri, Pier Giuseppe. « Crystal and Mud Contracts : The Theory of Contract and the Ontology of Values ». Dans The Constitutional Dimension of Contract Law, 123–49. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-49843-0_5.
Streck, Danilo R. « Conscientização : Genesis and Dimensions of Critical Consciousness ». Dans A New Social Contract in a Latin American Education Context, 101–17. New York : Palgrave Macmillan US, 2010. http://dx.doi.org/10.1057/9780230115293_7.
Golden, John M., et George A. C. Graham. « Three-dimensional Contact Problems ». Dans Boundary Value Problems in Linear Viscoelasticity, 172–98. Berlin, Heidelberg : Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-662-06156-5_5.
Actes de conférences sur le sujet "Dimension du contact":
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Yang, Xia, et Hong Xiao. « Three Dimension Multi-body Contact Boundary Element Method ». Dans 2009 International Joint Conference on Computational Sciences and Optimization, CSO. IEEE, 2009. http://dx.doi.org/10.1109/cso.2009.237.
Liou, Jen Luen, et Jen Fin Lin. « A Microcontact Model Developed for Asperity Heights With a Variable Profile Fractal Dimension, a Surface Fractal Dimension, Topothesy, and Non-Gaussian Distribution ». Dans STLE/ASME 2008 International Joint Tribology Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/ijtc2008-71086.
The cross sections formed by the contact asperities of two rough surfaces at an interference are island-shaped, rather than having the commonly assumed circular contour. These island-shaped contact surface contours show fractal behavior with a profile fractal dimension Ds. The surface fractal dimension for the asperity heights is defined as D and the topothesy is defined as G. In the study of Mandelbrot, the relationship between D and Ds was given as D = Ds+1 if these two fractal dimensions are obtained before contact deformation. In the present study, D, G, and Ds are considered to be varying with the mean separation (or the interference at the rough surface) between two contact surfaces. The D-Ds relationships for the contacts at the elastic, elastoplastic, and fully plastic deformations are derived and the inceptions of the elastoplastic deformation regime and the fully plastic deformation regime are redefined using the equality of two expressions established in two different ways for the number of contact spots (N).
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Denisov, Nikolay A., et Igor Kravchenko. « Shape-dimension optimization of contact medical laser delivery systems ». Dans BiOS Europe '96, sous la direction de Nathan I. Croitoru, Martin Frenz, Terence A. King, Riccardo Pratesi, Anna M. Verga Scheggi, Stefan Seeger et Otto S. Wolfbeis. SPIE, 1996. http://dx.doi.org/10.1117/12.259964.
Furukawa, Masaru, Junguo Xu et Jianhua Li. « Dimension Effect of Embedded Contact Sensor on Disk Defect Detection ». Dans ASME 2013 Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/isps2013-2895.
A thermal contact sensor embedded in a magnetic-head slider was developed. The sensor has been used for contact detection between a head slider and a disk in hard disk drives, and, our previous research has shown that the sensor could successfully detect disk defects including asperities and pits. In this work, the sensor dimension effect and characterization of defect size was studied in order to better understanding of defect size. The results showed that the defect size can be clarified by considering sensor size and scan pitch.
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Xiao, Hong, Wei Fang, Yan Zhao, Mark Huang, Kai Wang, Darren Wong et Jack Jau. « High-throughput contact critical dimension and gray level value measurement ». Dans SPIE 31st International Symposium on Advanced Lithography, sous la direction de Chas N. Archie. SPIE, 2006. http://dx.doi.org/10.1117/12.656978.
Feng Li, Yun, Xi Xi Han et Sheng Yang Li. « Non-contact dimension measurement of mechanical parts based on image processing ». Dans 2015 8th International Congress on Image and Signal Processing (CISP). IEEE, 2015. http://dx.doi.org/10.1109/cisp.2015.7408020.
Kim, Hung-Eil, Jun-Sung Chun, Stanley Barnett et James Shih. « Effect of mask critical dimension error for subquarter-micron contact hole ». Dans Microlithography '99, sous la direction de Luc Van den Hove. SPIE, 1999. http://dx.doi.org/10.1117/12.354400.
Mahore, Tushar, Kshitija Wankhade, Sayali Walekar et Manesh Kokare. « Weld Distortion Detection by Non-contact Dimension Measurement Based on Image Processing ». Dans 2019 4th International Conference on Recent Trends on Electronics, Information, Communication & Technology (RTEICT). IEEE, 2019. http://dx.doi.org/10.1109/rteict46194.2019.9016945.
Yit-Ping Kok et A. Abdul Aziz. « Influence of contact dimension on end resistance characterization for transmission line model ». Dans 2004 IEEE International Conference on Semiconductor Electronics. IEEE, 2004. http://dx.doi.org/10.1109/smelec.2004.1620828.
Shevchenko, Sergey. « Search for leptoquarks, technicolor and contact interactions (Z', extra dimension,...) at LEP ». Dans International Europhysics Conference on High Energy Physics. Trieste, Italy : Sissa Medialab, 2001. http://dx.doi.org/10.22323/1.007.0150.
Rapports d'organisations sur le sujet "Dimension du contact":
1
Kulak, R. F. Adaptive contact elements for three-dimensional explicit transient analysis. Office of Scientific and Technical Information (OSTI), janvier 1989. http://dx.doi.org/10.2172/6417420.
Rigotti, Christophe, et Mohand-Saïd Hacid. Representing and Reasoning on Conceptual Queries Over Image Databases. Aachen University of Technology, 1999. http://dx.doi.org/10.25368/2022.89.
The problem of content management of multimedia data types (e.g., image, video, graphics) is becoming increasingly important with the development of advanced multimedia applications. Traditional database management systems are inadequate for the handling of such data types. They require new techniques for query formulation, retrieval, evaluation, and navigation. In this paper we develop a knowledge-based framework for modeling and retrieving image data by content. To represent the various aspects of an image object's characteristics, we propose a model which consists of three layers: (1) Feature and Content Layer, intended to contain image visual features such as contours, shapes,etc.; (2) Object Layer, which provides the (conceptual) content dimension of images; and (3) Schema Layer, which contains the structured abstractions of images, i.e., a general schema about the classes of objects represented in the object layer. We propose two abstract languages on the basis of description logics: one for describing knowledge of the object and schema layers, and the other, more expressive, for making queries. Queries can refer to the form dimension (i.e., information of the Feature and Content Layer) or to the content dimension (i.e., information of the Object Layer). These languages employ a variable free notation, and they are well suited for the design, verification and complexity analysis of algorithms. As the amount of information contained in the previous layers may be huge and operations performed at the Feature and Content Layer are time-consuming, resorting to the use of materialized views to process and optimize queries may be extremely useful. For that, we propose a formal framework for testing containment of a query in a view expressed in our query language. The algorithm we propose is sound and complete and relatively efficient.
3
Rigotti, Christophe, et Mohand-Saïd Hacid. Representing and Reasoning on Conceptual Queries Over Image Databases. Aachen University of Technology, 1999. http://dx.doi.org/10.25368/2022.89.
The problem of content management of multimedia data types (e.g., image, video, graphics) is becoming increasingly important with the development of advanced multimedia applications. Traditional database management systems are inadequate for the handling of such data types. They require new techniques for query formulation, retrieval, evaluation, and navigation. In this paper we develop a knowledge-based framework for modeling and retrieving image data by content. To represent the various aspects of an image object's characteristics, we propose a model which consists of three layers: (1) Feature and Content Layer, intended to contain image visual features such as contours, shapes,etc.; (2) Object Layer, which provides the (conceptual) content dimension of images; and (3) Schema Layer, which contains the structured abstractions of images, i.e., a general schema about the classes of objects represented in the object layer. We propose two abstract languages on the basis of description logics: one for describing knowledge of the object and schema layers, and the other, more expressive, for making queries. Queries can refer to the form dimension (i.e., information of the Feature and Content Layer) or to the content dimension (i.e., information of the Object Layer). These languages employ a variable free notation, and they are well suited for the design, verification and complexity analysis of algorithms. As the amount of information contained in the previous layers may be huge and operations performed at the Feature and Content Layer are time-consuming, resorting to the use of materialized views to process and optimize queries may be extremely useful. For that, we propose a formal framework for testing containment of a query in a view expressed in our query language. The algorithm we propose is sound and complete and relatively efficient.
4
Jones, R. E., et P. Papadopoulos. A Novel Three-Dimensional Contact Finite Element Based on Smooth Pressure Interpolations. Office of Scientific and Technical Information (OSTI), octobre 2000. http://dx.doi.org/10.2172/767443.
Chaudhary, A. B., et K. J. Bathe. A Lagrange Multiplier/Segment Procedure for Solution of Three-Dimensional Contact Problems. Fort Belvoir, VA : Defense Technical Information Center, octobre 1985. http://dx.doi.org/10.21236/ada161838.
Böhme, Stephan, et Marcel Lippmann. Description Logics of Context with Rigid Roles Revisited. Technische Universität Dresden, 2015. http://dx.doi.org/10.25368/2022.211.
To represent and reason about contextualized knowledge often two-dimensional Description Logics (DLs) are employed, where one DL is used to describe contexts (or possible worlds) and the other DL is used to describe the objects, i.e. the relational structure of the specific contexts. Previous approaches for DLs of context that combined pairs of DLs resulted in undecidability in those cases where so-called rigid roles are admitted, i.e. if parts of the relational structure are the same in all contexts. In this paper, we present a novel combination of pairs of DLs and show that reasoning stays decidable even in the presence of rigid roles. We give complexity results for various combinations of DLs involving ALC, SHOQ, and EL.
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Evans, James W., Jane K. Evans et David W. Green. Computer programs for adjusting the mechanical properties of 2-inch dimension lumber for changes in moisture content. Madison, WI : U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 1990. http://dx.doi.org/10.2737/fpl-gtr-63.
Sadachar, Amrut, et Ann Marie Fiore. Relationship between Experience Economy Dimensions and Perceived Experiential Value in the Context of Indian Shopping Malls. Ames : Iowa State University, Digital Repository, novembre 2015. http://dx.doi.org/10.31274/itaa_proceedings-180814-53.
Baluk, Nadia, Natalia Basij, Larysa Buk et Olha Vovchanska. VR/AR-TECHNOLOGIES – NEW CONTENT OF THE NEW MEDIA. Ivan Franko National University of Lviv, février 2021. http://dx.doi.org/10.30970/vjo.2021.49.11074.
The article analyzes the peculiarities of the media content shaping and transformation in the convergent dimension of cross-media, taking into account the possibilities of augmented reality. With the help of the principles of objectivity, complexity and reliability in scientific research, a number of general scientific and special methods are used: method of analysis, synthesis, generalization, method of monitoring, observation, problem-thematic, typological and discursive methods. According to the form of information presentation, such types of media content as visual, audio, verbal and combined are defined and characterized. The most important in journalism is verbal content, it is the one that carries the main information load. The dynamic development of converged media leads to the dominance of image and video content; the likelihood of increasing the secondary content of the text increases. Given the market situation, the effective information product is a combined content that combines text with images, spreadsheets with video, animation with infographics, etc. Increasing number of new media are using applications and website platforms to interact with recipients. To proceed, the peculiarities of the new content of new media with the involvement of augmented reality are determined. Examples of successful interactive communication between recipients, the leading news agencies and commercial structures are provided. The conditions for effective use of VR / AR-technologies in the media content of new media, the involvement of viewers in changing stories with augmented reality are determined. The so-called immersive effect with the use of VR / AR-technologies involves complete immersion, immersion of the interested audience in the essence of the event being relayed. This interaction can be achieved through different types of VR video interactivity. One of the most important results of using VR content is the spatio-temporal and emotional immersion of viewers in the plot. The recipient turns from an external observer into an internal one; but his constant participation requires that the user preferences are taken into account. Factors such as satisfaction, positive reinforcement, empathy, and value influence the choice of VR / AR content by viewers.
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Maconachie, Roy, Neil Howard et Rosilin Bock. Theorising ‘Harm’ in Relation to Children’s Work. Institute of Development Studies (IDS), novembre 2020. http://dx.doi.org/10.19088/acha.2020.003.
A central and implicit issue that shapes the present political and institutional consensus surrounding child labour is the notion of harm. Although efforts to address children’s work rest firmly on assumptions about what is harmful, no coherent theory of harm exists. In this paper, we critically explore ‘harm’ in the context of children’s work and call for a more situated and nuanced approach, incorporating ‘subjective’ and ‘objective’ dimensions. Such an approach has important implications for future research and policy action.
