Готові списки джерел за темами / Arcs continus

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Добірка наукової літератури з теми "Arcs continus"

Автор: Grafiati
Опубліковано: 22 лютого 2025

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Статті в журналах з теми "Arcs continus"

1

Vel, M. Van De. "Invariant Arcs, Whitney Levels, and Kelley Continua." Transactions of the American Mathematical Society 326, no. 2 (August 1991): 749. http://dx.doi.org/10.2307/2001782.

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van de Vel, M. "Invariant arcs, Whitney levels, and Kelley continua." Transactions of the American Mathematical Society 326, no. 2 (February 1, 1991): 749–71. http://dx.doi.org/10.1090/s0002-9947-1991-1010415-8.

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3

Thomassen, Carsten, and Antoine Vella. "Graph-like continua, augmenting arcs, and Menger’s theorem." Combinatorica 28, no. 5 (August 12, 2008): 595–623. http://dx.doi.org/10.1007/s00493-008-2342-9.

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4

van Mill, J., and V. Valov. "Homogeneous continua that are not separated by arcs." Acta Mathematica Hungarica 157, no. 2 (October 22, 2018): 364–70. http://dx.doi.org/10.1007/s10474-018-0881-0.

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5

Karassev, A., V. Todorov, and V. Valov. "Alexandroff Manifolds and Homogeneous Continua." Canadian Mathematical Bulletin 57, no. 2 (June 14, 2014): 335–43. http://dx.doi.org/10.4153/cmb-2013-010-8.

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AbstractWe prove the following result announced by the second and third authors: Any homogeneous, metric ANR-continuum is a -continuum provided dimGX = n ≥ 1 and , where G is a principal ideal domain. This implies that any homogeneous n-dimensional metric ANR-continuum is a Vn-continuum in the sense of Alexandroff. We also prove that any finite-dimensional cyclic in dimension n homogeneous metric continuum X, satisfying for some group G and n ≥ 1, cannot be separated by a compactum K with and dimGK ≤ n – 1. This provides a partial answer to a question of Kallipoliti–Papasoglu as to whether a two-dimensional homogeneous Peano continuum can be separated by arcs.
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6

Kallipoliti, Myrto, and Panos Papasoglu. "Simply connected homogeneous continua are not separated by arcs." Topology and its Applications 154, no. 17 (September 2007): 3039–47. http://dx.doi.org/10.1016/j.topol.2007.06.016.

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7

Prajs, Janusz R. "Openly homogeneous continua having only arcs for proper subcontinua." Topology and its Applications 31, no. 2 (March 1989): 133–47. http://dx.doi.org/10.1016/0166-8641(89)90077-1.

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8

Nikiel, J., L. B. Treybig, and H. M. Tuncali. "Local connectivity and maps onto non-metrizable arcs." International Journal of Mathematics and Mathematical Sciences 20, no. 4 (1997): 681–88. http://dx.doi.org/10.1155/s0161171297000938.

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Three classes of locally connected continua which admit sufficiently many maps onto non-metric arcs are investigated. It is proved that all continua in those classes are continuous images of arcs and, therefore, have other quite nice properties.
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9

Hernández-Gutiérrez, Rodrigo, Alejandro Illanes, and Verónica Martínez-de-la-Vega. "Uniqueness of hyperspaces of indecomposable arc continua." Glasnik Matematicki 49, no. 2 (December 18, 2014): 421–32. http://dx.doi.org/10.3336/gm.49.2.14.

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10

Ma, Long, Sihan Qian, Haihui Dong, Jiemin Fan, Jin Xu, Liang Cao, Shuai Xu, et al. "Navigability of Liquefied Natural Gas Carriers Along the Northern Sea Route." Journal of Marine Science and Engineering 12, no. 12 (November 27, 2024): 2166. http://dx.doi.org/10.3390/jmse12122166.

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As Arctic sea ice continues to melt and global demand for clean energy rises, Russia’s Liquefied Natural Gas (LNG) exports via the Northern Sea Route (NSR) are rapidly increasing. To ensure the operational safety of LNG carriers and safeguard the economic interests of stakeholders, including shipowners, a thorough assessment of the navigability of various ice-class LNG carriers along this route is essential. This study collected Arctic ice condition data from 2014 to 2023 and applied the Polar Operational Limit Assessment Risk Indexing System (POLARIS) methodology to calculate the Risk Index Outcome (RIO) for LNG carriers with No Ice Class, Arc4, and Arc7 ice classifications in Arctic waters. A navigability threshold of 95% RIO ≥ 0 was established to define navigable windows, and critical waters were identified where sections of the route remain in hazardous or risky conditions year-round. The results indicate that for No Ice Class vessels, Arc4 vessels, and Arc7 vessels, the navigable windows for westbound Route 1 and Route 2 under light, normal, and heavy ice conditions range from 70 to 133 days, 70 to 365 days, and 70 to 365 days, respectively, while for eastbound Route 3, the navigable windows range from 0 to 84 days, 0 to 238 days, and 7 to 365 days, respectively. The critical waters affecting the navigability of No Ice Class vessels, Arc4 vessels, and Arc7 vessels are primarily located in the Kara Sea, Laptev Sea and East Siberian Sea. This study, using the POLARIS methodology, provides valuable insights into the navigability of LNG carriers with different ice classes along the NSR, supporting the development and utilization of Arctic energy and shipping routes while offering decision-making support for stakeholders involved in Arctic maritime operations.
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Дисертації з теми "Arcs continus"

1

Barreau, Gabriel. "Application d'une méthode semi-implicite couplée avec des outils d'adaptation de maillage anisotropique pour modéliser des arcs continus." Electronic Thesis or Diss., Toulouse, ISAE, 2024. http://www.theses.fr/2024ESAE0059.

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Un avion de ligne est foudroyé en moyenne une à deux fois par an, en considérant la taille des flottes d’avions dans le monde, c’est un phénomène assez fréquent. Lors du foudroiement, le courant injecté peut varier de 200 à 200kA. L’éclair peut alors être divisé en deux phases distincts : la phase impulsionnelle où l’intensité du courant peut atteindre 200kA pendant quelques microsecondes. Elle génère des chocs associés à un écoulement compressible. La phase continue où l’intensité du courant de quelques centaines d’ampères est quasi constant sur une durée de quelques centaines de millisecondes. L’écoulement autour de l’arc a des caractéristiques d’écoulement incompressible.La modélisation de ce phénomène en une seule simulation est très complexe car elle fait intervenir deux physiques d’écoulement différentes, et donc en général la partie continue est modélisée par des méthodes incompressibles et la partie impulsionnelle par des méthodes compressibles. Or, il n’est pas possible de résoudre des écoulements compressibles avec une méthode incompressible, et à cause de la contrainte sur le pas de temps, une méthode compressible n’est pas adaptée pour la résolution d’écoulement incompressible.Comme on souhaite modéliser un foudroiement dans son intégralité, on va chercher des méthodes compressibles capables de résoudre des écoulements bas Mach pour des valeurs de pas de temps raisonnables. Les méthodes semi-implicites sont des méthodes qui en implicitant une partie des termes des équations de conservations permettent de réduire la contrainte sur le pas de temps et permettent alors de résoudre un écoulement bas Mach avec un schéma compressibles.Après une étude bibliographique sur les méthodes existantes, une nouvelle méthode semi-implicite traitant le gaz réel a été développé dans le cadre de cette thèse et a été implémentée dans le code MHD Taranis. La prise en compte des gaz réels est possible grâce à l’utilisation de tables thermodynamiques qui sont générées par le code Sethi. . Pour diminuer les contraintes sur les temps de simulation des géométries 3D, le code Taranis est couplé avec des outils d’adaptation de maillage anisotrope développé à l’INRIA. Ces outils permettent de générer un maillage qui va s’adapter selon l’écoulement de la configuration et donc mailler uniquement aux endroits où c’est nécessaire. Il a été alors nécessaire d’adapter les critères d’adaptation développés pour les calculs de mécanique des fluides à ceux d’un plasma thermique.Pour valider la capacité du nouveau schéma à modéliser des arcs continus, une configuration d’un arc à combustion libre entre cathode en forme de pointe et une anode en forme de plaque est modélisation en 3D. Cette configuration permettra de montrer la capacité du code Taranis à modéliser des arcs continus, et de montrer les intérêts des outils d’adaptation de maillage dans le cas de modélisation d’écoulement plasma
A commercial aircraft is struck by lightning on average once or twice a year. Considering the size of the global aircraft fleet, this is a fairly common phenomenon. During a lightning strike, the injected current can vary from 200 to 200 kA. The lightning can then be divided into two distinct phases: the impulsive phase, where the current intensity can reach 200 kA for a few microseconds, generating shocks associated with compressible flow; and the continuous phase, where the current intensity of a few hundred amperes remains almost constant over a duration of a few hundred milliseconds. The flow around the arc has incompressible flow characteristics during this phase.Modeling this phenomenon in a single simulation is very complex because it involves two different flow physics, so generally, the continuous part is modeled using incompressible methods, and the impulsive part using compressible methods. However, it is not possible to solve compressible flows with an incompressible method, and due to the time step constraint, a compressible method is not suitable for solving incompressible flow.As we aim to model a lightning strike in its entirety, we will seek compressible methods capable of resolving low Mach number flows with reasonable time step values. Semi-implicit methods are techniques that, by implicitly handling some terms of the conservation equations, reduce the time step constraint and thus allow solving low Mach number flows with a compressible scheme.After a bibliographical study on existing methods, a new semi-implicit method handling real gas was developed as part of this thesis and implemented in the MHD code Taranis. The consideration of real gases is made possible through the use of thermodynamic tables generated by the Sethi code. To reduce constraints on simulation times for 3D geometries, the Taranis code is coupled with anisotropic mesh adaptation tools developed at INRIA. These tools generate a mesh that adapts according to the configuration flow, thus meshing only where necessary. It was then necessary to adapt the adaptation criteria developed for fluid mechanics calculations to those of a thermal plasma.To validate the new scheme's ability to model continuous arcs, a configuration of a free-burning arc between a pointed cathode and a plate anode is modeled in 3D. This configuration will demonstrate the Taranis code's capability to model continuous arcs and show the benefits of mesh adaptation tools in plasma flow modeling
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Sallais, Damien. "Contribution à l'étude de nouveaux matériaux élaborés par métallurgie des poudres pour les contacts électriques soumis aux arcs de coupure et de fermeture du courant continu." Rennes 1, 2007. http://www.theses.fr/2007REN1S162.

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Pour satisfaire la demande croissante en puissance électrique des automobiles modernes, l’actuel réseau sous 14 VDC ainsi que les systèmes de commande qui lui sont rattachés doivent évoluer. C’est le cas en particulier des dispositifs de coupure. Deux solutions envisageables pour répondre à ces besoins en puissance électrique ont tout d’abord été confrontées : l’augmentation du courant sous 14 VDC et le passage à une tension de 42 VDC. L’augmentation de la tension se révèle être l’option la plus intéressante mais exige le développement de nouveaux matériaux de contact. De nouveaux pseudo alliages AgMeO ainsi qu’un matériau composite très innovant ont donc été élaborés et testés électriquement. Ils représentent des solutions matériau très intéressantes en terme de réduction de la durée d’arc et du gap d’extinction. Parallèlement à ces études expérimentales, des calculs théoriques ont été menés afin de simuler l’érosion et le transfert de matière entre les contacts
In order to satisfy the increasing electrical power needs in modern cars, the actual 14 VDC battery and its command systems as switching devices, have to evolve. First, two present tendencies were evaluated: the increase of current levels under 14 VDC and the change of voltage from 14 VDC to 42 VDC. A new 42 VDC system seems to be the more interesting solution, it needs however the development of new electrical contact materials. New silver-oxide composites and an innovating contact material were also elaborated and tested. They exhibit strong improvements in term of arc duration and extinction gap minimization. In addition, a theoretical study using a finite element simulation was led to calculate erosion and material transfer between contacts
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3

Jackson, Regina Greiwe Smith Michel. "Properties of nonmetric hereditarily indecomposable subcontinua of finite products of lexicographic arcs." Auburn, Ala., 2009. http://hdl.handle.net/10415/1922.

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4

El, Babsiri Mohamed. "Contributions à l'économétrie des modèles financiers en temps continu." Paris 9, 1994. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1994PA090007.

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Анотація:
Le présent travail se compose de sept articles indépendants. Le premier article fait le point sur la littérature concernant l'estimation des paramètres de processus en temps continu récemment introduits en finance. Le deuxième article montre que, la densité de transition du processus de diffusion des taux ou la tendance et la volatilité sont fonctions affines du niveau des taux, s'exprime par des fonctions confluentes hypergéométriques solutions de l'équation de Kummer. Les troisième et quatrième articles introduisent une nouvelle classe de modèles Arch à seuils ou les variances conditionnelles des valeurs positives et négatives du bruit sont des fonctions linéaires par morceaux de ses valeurs passées ainsi que des valeurs passées de ces variances. Ce type de modèles permet d'appréhender le caractère dissymétrique de la volatilité des cours boursiers d'une part et d'approximer d'autre part une large classe de modèles à volatilité stochastique récemment utilisés dans l'évaluation des options. Nous avons finalement estimé, testé et comparé notre modèle à d'autres modèles Arch. Le cinquième article examine le problème de l'agrégation temporelle des relations multi betas liant la prime de risque d'un actif financier à ses sensibilités par rapport à un ensemble de facteurs. Ceci nous a amenés à une modélisation en temps continu des cours des actions en fonction de facteurs browniens et poissoniens, et à déduire de nouvelles relations multi betas. Aussi, nous avons développé de nouvelles procédures statistiques, basées sur les moindres carrés asymptotiques pour tester ce type de relations. Le sixième article s'intéresse au comportement rationnel des emprunteurs face à une évolution stochastique des taux d'intérêt. Le risque de remboursement anticipé est ainsi caractérisé par l'existence d'un taux de réserve en fonction duquel les emprunteurs forment leurs décisions. Dans ce cadre, la loi des durées de vie des créances est explicitée. Enfin, dans le dernier article, nous appliquons les techniques du mouvement brownien absorbe avec tendance pour trouver des solutions à une large classe de problèmes de changement de régimes qui se posent dans les marches des devises. Nous généralisons ainsi la solution du problème à une barrière absorbante et donnons une méthode alternative à celle basée sur les techniques du calcul des variations
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LIEUTIER, MICHEL. "Etude experimentale de la coupure d'un courant continu par mise en oscillation de l'arc electrique." Clermont-Ferrand 2, 1990. http://www.theses.fr/1990CLF2D221.

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Cette these decrit un procede de mise en oscillation de l'arc afin de creer un zero de courant dans un appareil de coupure. Il utilise, en parallele sur un contacteur, un circuit oscillant lc de commutation et une varistance. Des la separation des contacts, l'oscillation de l'arc peut etre croissante et provoquer un passage par zero. Le courant de ligne est alors derive dans la capacite puis dans la varistance ou l'energie du systeme se dissipe. Le dispositif experimental met en uvre: un capteur destine a extraire la tension d'arc (<200 v) de la tension atteinte aux bornes du contacteur (>1000 v); une matrice de vingt fibres optiques qui permet de determiner la geometrie de l'arc; un systeme de fibres fluorescentes qui mesure son intensite lumineuse. Dans la gamme de tension exploree (jusqu'a 450 v), on peut tirer les conclusions suivantes: la coupure des courants inductifs (<20 a) est realisee avec des durees d'arc tres faibles (quelques ms); l'arc, au cours des oscillations conduisant au zero, reste entre les contacts; le courant d'arc et son intensite lumineuse sont proportionnels. Par rapport a la technique classique de soufflage dans une chambre, qui engendre des durees d'arc importantes (plusieurs dizaines de ms), l'utilisation d'un circuit de commutation permet donc de reduire l'usure des contacts et les dimensions de l'appareil de coupure. Une modelisation du circuit, a partir de l'equation de mayr, permet de simuler l'evolution du courant dans l'interrupteur
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Heston, Dawn M. "Scaffolding the Continua of Biliterate Development in the Spanish Language Immersion Classroom." Thesis, University of Missouri - Columbia, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13877148.

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The purpose of this qualitative research project is to describe the scaffolding strategies used by a teacher to engage and support students as they work within the continua of biliterate development in the fifth-grade Spanish language immersion classroom. As language immersion programs and dual language schools continue to grow in popularity in Canada and the United States, this study seeks to illuminate and interpret a teacher’s work with students in the Spanish Language Immersion Program (SLIP), a research site located in the urban Midwestern United States.

This instrumental case study employed the lens of Sociocultural Theory to explore the principal research question: How does the teacher scaffold student development of biliteracy within language and content instruction in the immersion school context? The research also explores pre-planned scaffolding versus interactional scaffolding, as well as the tensions and forces within the broader context that the teacher encounters while working with students in this bilingual educational environment. Classroom observations, teacher interviews, administration interviews, and artifacts were analyzed using methods borrowed from Grounded Theory.

Findings from this study highlight the characteristics of the Community of Practice created by the teacher in this classroom that include a focus upon encouragement, knowledge, organization, and literate habitus. Additionally, two visual models were created to present the data including: “Scaffolding Episodes in the Development of Biliteracy,” to illustrate the task-oriented support provided by the teacher, and “Centripetal versus Centrifugal Forces,” to present the forces and tensions that the teacher faced within the historical phases of the Spanish Language Immersion Program.

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Wexelblat, Alan Daniel. "A feature-based approach to continuous-gesture analysis." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/29074.

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Vigoda, Benjamin William 1973. "Continuous-time analog circuits for statistical signal processing." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/62962.

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Анотація:
Thesis (Ph. D.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2003.
Vita.
Includes bibliographical references (p. 205-209).
This thesis proposes an alternate paradigm for designing computers using continuous-time analog circuits. Digital computation sacrifices continuous degrees of freedom. A principled approach to recovering them is to view analog circuits as propagating probabilities in a message passing algorithm. Within this framework, analog continuous-time circuits can perform robust, programmable, high-speed, low-power, cost-effective, statistical signal processing. This methodology will have broad application to systems which can benefit from low-power, high-speed signal processing and offers the possibility of adaptable/programmable high-speed circuitry at frequencies where digital circuitry would be cost and power prohibitive. Many problems must be solved before the new design methodology can be shown to be useful in practice: Continuous-time signal processing is not well understood. Analog computational circuits known as "soft-gates" have been previously proposed, but a complementary set of analog memory circuits is still lacking. Analog circuits are usually tunable, rarely reconfigurable, but never programmable. The thesis develops an understanding of the convergence and synchronization of statistical signal processing algorithms in continuous time, and explores the use of linear and nonlinear circuits for analog memory. An exemplary embodiment called the Noise Lock Loop (NLL) using these design primitives is demonstrated to perform direct-sequence spread-spectrum acquisition and tracking functionality and promises order-of-magnitude wins over digital implementations. A building block for the construction of programmable analog gate arrays, the "soft-multiplexer" is also proposed.
by Benjamin Vigoda.
Ph.D.
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Thirkell, Paul. "The integration of digitally mediated imaging techniques with 19th century continuous tone printing processes." Thesis, University of the West of England, Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327367.

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Douce, Alexandre. "Modélisation 3-D du chauffage d'un bain métallique par plasma d'arc transféré : application à un réacteur axisymétrique." Châtenay-Malabry, Ecole centrale de Paris, 1999. http://www.theses.fr/1999ECAP0655.

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L’objet de la thèse est le développement d'un modèle numérique de simulation du chauffage d'un bain métallique par plasma d'arc transféré. Cette modélisation est appliquée à la simulation d'un four expérimental de forme géométrique axisymétrique. Ce four pilote à arc transféré, de petite capacité (200kW – 2000A, 300kg de fer), est développé au laboratoire plasma d'EDF-division R & D aux renardières pour étudier les transferts thermiques dans ce type de chauffage. Le modèle permet le calcul des différents champs (vitesse, température, variables électromagnétiques) dans la région de l'arc électrique, dans le bain et dans l'électrode de sole. Les équations de Navier-Stokes couplées aux équations de l'électromagnétisme sont résolues dans chaque domaine par une méthode numérique de type volumes finis. Pour le calcul de l'arc, les transferts radiatifs sont calcules de manière à prendre en compte les forts gradients de température présents dans l'arc électrique. Le transport des vapeurs métalliques et leurs effets sur les propriétés du plasma sont également pris en compte. Un modèle unidimensionnel spécifique est utilisé pour la modélisation de la couche limite anodique au-dessus du bain, il permet de détailler les interactions arc/bain et d'assurer le couplage entre les domaines de calcul arc et bain par des conditions aux limites a l'interface. Deux configurations de fonctionnement du four sont étudiées, avec des longueurs d'arc de 0,15m et 0,25m respectivement. Les résultats sont présentés et comparés avec des mesures de flux effectuées sur le four dans des conditions similaires.
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Книги з теми "Arcs continus"

1

Lathan, Sharon. In the arms of Mr. Darcy: Pride and prejudice continues. Napervile, Ill: Sourcebooks Landmark, 2010.

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2

Nikiel, Jacek. Continuous images of arcs and inverse limit methods. Providence, RI: American Mathematical Society, 1993.

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3

Office, General Accounting. Military exports: Offset demands continue to grow : report to congressional requesters. Washington, D.C: The Office, 1996.

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4

Scholastic Inc. Community quilt: Community involvement: in a community, some things continue and some things change : literacy sourcebook. New York: Scholastic Inc., 1996.

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5

United States. Congress. House. Committee on Foreign Affairs. Providing that the President shall continue to adhere to the numerical sublimits of the SALT agreements as long as the Soviet Union does likewise: Report together with minority views (to accompany H. Con. Res. 350). [Washington, D.C.?: U.S. G.P.O., 1986.

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United States. Congress. House. Committee on Foreign Affairs. Providing that the President shall continue to adhere to the numerical sublimits of the SALT agreements as long as the Soviet Union does likewise: Report together with minority views (to accompany H. Con. Res. 350). [Washington, D.C.?: U.S. G.P.O., 1986.

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7

United States. Congress. House. Committee on Foreign Affairs. Providing that the President shall continue to adhere to the numerical sublimits of the SALT agreements as long as the Soviet Union does likewise: Report together with minority views (to accompany H. Con. Res. 350). [Washington, D.C.?: U.S. G.P.O., 1986.

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8

Cheng, Xiaodong, Zixiong Li, and Zhaoming Liu. Qian nü you hun II: Ren jian dao : A Chinese ghost story II, the story continues. Hong Kong: Media Asia, 1993.

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9

Oesterle, R. G. Design of precast, prestressed bridge girders made continuous. Washington, D.C: Transportation Research Board, National Research Council, 1989.

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United States. President (1993-2001 : Clinton). Continuation of the national emergency with respect to chemical and biological weapons: Communication from the President of the United States transmitting notification that the emergency regarding export control regulations for chemical and biological weapons is to continue in effect beyond November 16, 1993, pursuant to 50 U.S.C. 1622(d). Washington: U.S. G.P.O., 1993.

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Частини книг з теми "Arcs continus"

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Mortini, Raymond, and Rudolf Rupp. "Local and simple connectedness, curves, arcs, and continua." In Extension Problems and Stable Ranks, 865–938. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-73872-3_13.

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Das, K., and R. C. Batra. "Instabilites in Arch Shaped MEMS." In Continuous Media with Microstructure, 147–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11445-8_13.

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Callahan, Carolyn M., Tracy C. Missett, Amy Price Azano, Melanie Caughey, Annalissa V. Brodersen, and Mary Tackett. "Setting, Continued." In Fiction and Nonfiction Language Arts Units for Gifted Students in Grade 4, 57–60. New York: Routledge, 2021. http://dx.doi.org/10.4324/9781003235194-8.

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Callahan, Carolyn M., Tracy C. Missett, Amy Price Azano, Melanie Caughey, Annalissa V. Brodersen, and Mary Tackett. "Point of View, Continued." In Fiction and Nonfiction Language Arts Units for Gifted Students in Grade 4, 95–98. New York: Routledge, 2021. http://dx.doi.org/10.4324/9781003235194-13.

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van Hooft, Paul. "The US and Extended Deterrence." In NL ARMS, 87–107. The Hague: T.M.C. Asser Press, 2020. http://dx.doi.org/10.1007/978-94-6265-419-8_6.

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AbstractThe U.S. provides extended nuclear deterrence to allies in Europe, Asia, and elsewhere. The 2018 NPR signals several potentially destabilizing policies, including lowering the threshold for use and adding low-yield capabilities, and it emphasizes the need for nuclear superiority. This chapter argues that the U.S. is changing its nuclear posture to address the growing challenge to U.S. conventional superiority. Extended nuclear deterrence is inherently dubious and the asymmetry between the U.S. on the one hand, and its allies and adversaries on the other, makes it doubly so. In the coming decades, this will continue to generate problems for the U.S. as long as it maintains its alliance commitments.
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Jian, Gong. "Evolution of the “Crescent Guard” in Chinese Swords." In Martial Culture and Historical Martial Arts in Europe and Asia, 151–82. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2037-0_5.

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AbstractIron and steel arms appeared in China during the late Warring States while guards on Han dynasty jian (double-edged sword) mainly continued Warring States designs. Single-edged ring-pommel sword (huanshoudao) which appeared during the same period did not have a guard. During the Jin dynasty, a type of V-shape sword guard appeared, which continued into the Southern and Northern dynasties. In the Tang dynasty, on the one hand, arms design continued Northern Zhou and Sui trends; at the same time, it absorbed Turkic and Sassanid influences from the west, which gave rise to a unique Tang sword aesthetic. From then on, V-shape guards started to gain popularity in China. Developments of this style were to have a major influence on sword guard designs during the Song, as well as among the Mongols and Tibetans until it finally attained the familiar form of zoomorphic guard during the Ming and Qing dynasties.
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Zhang, G. Y., Y. X. Xiao, J. H. Zhang, and J. Y. Luo. "Study on Optimization of Row Spacing Between Steel Arches in Deep Buried Fault Cave Sections." In Lecture Notes in Civil Engineering, 412–29. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1260-3_38.

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AbstractAs a widely used support form in tunnel support, the support effect of steel arch is influenced by the row distance between steel arches. In F8 fault fracture zone of the North Main Canal of Letan Reservoir in Guangxi, the support system of “steel arch + shotcrete” in this faulted cavern section was equalized with elastic modulus and yield stress by using theoretical analysis and numerical simulation, and the characteristic curves of rock support of deeply buried circular cavern under modified axisymmetric loading were obtained. The sensitivity analysis and optimization study of the spacing between steel arches were conducted by using FLAC3D. The results show that with the increase of steel arch spacing, the cavity wall displacement increases, the support reaction force decreases nonlinearly, and the radial displacement and plastic zone around the cavity continue to increase. When the distance between steel arches >600 mm, the deformation of cavern perimeter changes abruptly and the plastic zone increases significantly. Based on comprehensive analysis, the optimization suggestions of steel arch are proposed.
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Foster, Raisa. "13. Anarchive and Arts-Based Research." In (An)Archive, 307–25. Cambridge, UK: Open Book Publishers, 2024. http://dx.doi.org/10.11647/obp.0383.13.

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Humans living in postindustrial societies have slowly realised that the ecological crisis is a crisis of our culture. Therefore, to address the ecocrisis, we need to understand our place as humans in a radically new way. We cannot continue to elevate ourselves above the rest of nature and exploit other lives in pursuing just our own interests. Archiving is one example of the human tendency to conquer and control culture and knowledge. Anarchiving has been thus suggested as a counteract that welcomes transformation and reciprocal knowledge-creation in multiple complex relations between different times and spaces and between people and the more-than-human world. In this chapter, I ask how arts-based research can be understood as a practice of anarchiving that challenges the assumptions of novelty and originality in art and in life. By applying contemporary art’s philosophy of (un)doing the existing unsustainable structures and values, it is possible to imagine more sustainable art-making processes and to adopt sustainable orientations towards life more generally. As example, in this chapter, I describe how I upcycled rediscovered materials in my art (drawings, videos, and sound artworks) instead of starting from mental (genius) ideas and raw (virgin) materials―an approach that allows for complex meanings to emerge in-between the materials and memories.
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Block, Louis, and Shannon Schumann. "Inverse Limit Spaces, Periodic Points, and Arcs." In Continua, 197–205. CRC Press, 2020. http://dx.doi.org/10.1201/9781003072379-15.

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Evans, Gareth. "The Count Continues: Stockpiles." In Small Arms Survey 2005, 71–96. Oxford University PressOxford, 2005. http://dx.doi.org/10.1093/oso/9780199280858.003.0004.

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Abstract The year 2004 saw powerful states struggling with unrestrained small arms proliferation. In Iraq and Afghanistan, in particular, armed individuals and groups continue to present a great obstacle to human security, coalition forces, and reconstruction efforts. Yet elsewhere, with far less firepower and attracting far less public attention, governments and civil society have quietly pressed on with a number of initiatives to address civilian small arms possession and armed violence. The aspect of small arms stockpiles most prominent in 2004 was internationally sponsored disarmament. Efforts in Afghanistan, Cote d’Ivoire, Haiti, Iraq, Liberia, and Sudan attracted the most attention, but many more were tried or debated. At the domestic level, 2004 also represented a turning point in a number of states’ efforts to control armed violence through enhanced domestic controls. All of these initiatives have hinted at strong national and international will to further the small arms control agenda.
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Тези доповідей конференцій з теми "Arcs continus"

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Fessler, Christoph, Cornelius F. Hahlweg, Jan Laser, Carlo Martini, and Witold Stypa. "Optics, arts, and history continued: interaction with new master's degree program in electrical engineering." In Optics Education and Outreach VIII, edited by G. Groot Gregory and Anne-Sophie Poulin-Girard, 25. SPIE, 2024. http://dx.doi.org/10.1117/12.3028239.

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Lee, I.-Pei, Yung-Heng Hsieh, Chun-Tai Yeh, Jheng-Yi Lin, Chang-Hong Wu, and Pei-Chun Lin. "Achieving Continuous Bouncing Through Resonance-Driven Mechanisms." In 2024 International Conference on Advanced Robotics and Intelligent Systems (ARIS), 1–8. IEEE, 2024. http://dx.doi.org/10.1109/aris62416.2024.10680007.

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Chiu, Chun-Chia, Yi-Hsiang Lo, Wei-Ting Ruan, Cheng-Han Yang, Ruen-Rone Lee, and Hung-Kuo Chu. "Continuous circular scribble arts." In SIGGRAPH '15: Special Interest Group on Computer Graphics and Interactive Techniques Conference. New York, NY, USA: ACM, 2015. http://dx.doi.org/10.1145/2787626.2792600.

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Combes, Richard, Alexandre Proutiere, and Alexandre Fauquette. "Unimodal Bandits with Continuous Arms." In SIGMETRICS '20: ACM SIGMETRICS / International Conference on Measurement and Modeling of Computer Systems. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3393691.3394225.

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Farahani, Alireza Ahanarani, Abbas Dideban, and Ebrahim Najafgholi. "Modeling continuous systems by Petri Nets using speed control arcs." In 2016 4th International Conference on Control, Instrumentation, and Automation (ICCIA). IEEE, 2016. http://dx.doi.org/10.1109/icciautom.2016.7483139.

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Walker, Ian D., Darren M. Dawson, Tamar Flash, Frank W. Grasso, Roger T. Hanlon, Binyamin Hochner, William M. Kier, Christopher C. Pagano, Christopher D. Rahn, and Qiming M. Zhang. "Continuum robot arms inspired by cephalopods." In Defense and Security, edited by Grant R. Gerhart, Charles M. Shoemaker, and Douglas W. Gage. SPIE, 2005. http://dx.doi.org/10.1117/12.606201.

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Meng, Brandon H., Isuru S. Godage, and Iyad Kanj. "Smooth Path Planning for Continuum Arms." In 2021 IEEE International Conference on Robotics and Automation (ICRA). IEEE, 2021. http://dx.doi.org/10.1109/icra48506.2021.9560982.

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Godage, Isuru S., David T. Branson, Emanuele Guglielmino, and Darwin G. Caldwell. "Path planning for multisection continuum arms." In 2012 IEEE International Conference on Mechatronics and Automation (ICMA). IEEE, 2012. http://dx.doi.org/10.1109/icma.2012.6283423.

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Godage, Isuru S., Raul Wirz, Ian D. Walker, and Robert J. Webster. "Efficient Spatial Dynamics for Continuum Arms." In ASME 2015 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/dscc2015-9932.

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Continuum robot dynamic models have previously involved a choice between high accuracy, numerically intensive models, and low accuracy, computationally efficient models. The objective of this paper is to provide an accurate dynamic model with low computational overhead. Our approach is to place point masses at the center of gravity of the continuum section, rather than along the robot’s backbone or centerline. This enables the model to match the robot’s energetic characteristics with many fewer point masses. We experimentally validate the model using a pneumatic muscle actuated continuum arm. We find that the proposed model successfully captures both the transient and steady state dynamics of the arm.
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Csencsits, M., B. A. Jones, W. McMahan, V. Iyengar, and I. D. Walker. "User interfaces for continuum robot arms." In 2005 IEEE/RSJ International Conference on Intelligent Robots and Systems. IEEE, 2005. http://dx.doi.org/10.1109/iros.2005.1545434.

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Звіти організацій з теми "Arcs continus"

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Ostrower, Ph.D., Francie. Why Is It Important That We Continue? Some Nonprofit Arts Organizations Rethink Their Value in Challenging Times. The University of Texas at Austin, October 2021. http://dx.doi.org/10.59656/a-ad6852.001.

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Mittelsteadt, Matthew. AI Verification: Mechanisms to Ensure AI Arms Control Compliance. Center for Security and Emerging Technology, February 2021. http://dx.doi.org/10.51593/20190020.

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The rapid integration of artificial intelligence into military systems raises critical questions of ethics, design and safety. While many states and organizations have called for some form of “AI arms control,” few have discussed the technical details of verifying countries’ compliance with these regulations. This brief offers a starting point, defining the goals of “AI verification” and proposing several mechanisms to support arms inspections and continuous verification.
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Wezeman, Pieter D., Katarina Djokic, Mathew George, Zain Hussain, and Siemon T. Wezeman. Trends in International Arms Transfers, 2023. Stockholm International Peace Research Institute, March 2024. http://dx.doi.org/10.55163/pbrp4239.

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Imports of major arms by states in Europe increased by 94 per cent between 2014–18 and 2019–23, while the global volume of international arms transfers decreased marginally, by 3.3 per cent. There were overall decreases in arms transfers to all other regions, but states in Asia and Oceania and the Middle East continued to import arms in much larger volumes than those in Europe. Nine of the 10 biggest arms importers in 2019–23, including the top 3 of India, Saudi Arabia and Qatar, were in Asia and Oceania or the Middle East. Ukraine became the fourth biggest arms importer globally after it received transfers of major arms from over 30 states in 2022–23. Arms exports by the United States, the world’s largest arms supplier, rose by 17 per cent between 2014–18 and 2019–23, while those by Russia fell by more than half (–53 per cent). France’s arms exports grew by 47 per cent and it moved just ahead of Russia to become the world’s second largest arms supplier. From 11 March 2024 the freely available SIPRI Arms Transfers Database includes updated data on transfers of major arms for 1950–2023, which replaces all previous data on arms transfers published by SIPRI. Based on the new data, this fact sheet presents global trends in arms exports and arms imports, and highlights selected issues related to transfers of major arms.
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Gattenhof, Sandra, Donna Hancox, Sasha Mackay, Kathryn Kelly, Te Oti Rakena, and Gabriela Baron. Valuing the Arts in Australia and Aotearoa New Zealand. Queensland University of Technology, December 2022. http://dx.doi.org/10.5204/rep.eprints.227800.

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The arts do not exist in vacuum and cannot be valued in abstract ways; their value is how they make people feel, what they can empower people to do and how they interact with place to create legacy. This research presents insights across Australia and Aotearoa New Zealand about the value of arts and culture that may be factored into whole of government decision making to enable creative, vibrant, liveable and inclusive communities and nations. The COVID-19 pandemic has revealed a great deal about our societies, our collective wellbeing, and how urgent the choices we make now are for our futures. There has been a great deal of discussion – formally and informally – about the value of the arts in our lives at this time. Rightly, it has been pointed out that during this profound disruption entertainment has been a lifeline for many, and this argument serves to re-enforce what the public (and governments) already know about audience behaviours and the economic value of the arts and entertainment sectors. Wesley Enoch stated in The Saturday Paper, “[m]etrics for success are already skewing from qualitative to quantitative. In coming years, this will continue unabated, with impact measured by numbers of eyeballs engaged in transitory exposure or mass distraction rather than deep connection, community development and risk” (2020, 7). This disconnect between the impact of arts and culture on individuals and communities, and what is measured, will continue without leadership from the sector that involves more diverse voices and perspectives. In undertaking this research for Australia Council for the Arts and Manatū Taonga Ministry for Culture & Heritage, New Zealand, the agreed aims of this research are expressed as: 1. Significantly advance the understanding and approaches to design, development and implementation of assessment frameworks to gauge the value and impact of arts engagement with a focus on redefining evaluative practices to determine wellbeing, public value and social inclusion resulting from arts engagement in Australia and Aotearoa New Zealand. 2. Develop comprehensive, contemporary, rigorous new language frameworks to account for a multiplicity of understandings related to the value and impact of arts and culture across diverse communities. 3. Conduct sector analysis around understandings of markers of impact and value of arts engagement to identify success factors for broad government, policy, professional practitioner and community engagement. This research develops innovative conceptual understandings that can be used to assess the value and impact of arts and cultural engagement. The discussion shows how interaction with arts and culture creates, supports and extends factors such as public value, wellbeing, and social inclusion. The intersection of previously published research, and interviews with key informants including artists, peak arts organisations, gallery or museum staff, community cultural development organisations, funders and researchers, illuminates the differing perceptions about public value. The report proffers opportunities to develop a new discourse about what the arts contribute, how the contribution can be described, and what opportunities exist to assist the arts sector to communicate outcomes of arts engagement in Australia and Aotearoa New Zealand.
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Wakefield, Benjamin. Opportunities for the European Union to Strengthen Biosecurity in Africa. Stockholm International Peace Research Institute, November 2022. http://dx.doi.org/10.55163/hbpq5439.

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The European Union (EU) has a long history of commitment to improving biological security and supporting multilateral approaches to arms controls and non-proliferation. It has supported various biosecurity programmes in recent years and continues to increase its financial support towards these, with a focus on the universalization of the Biological and Toxins Weapons Convention and United Nations Security Council Resolution 1540. More recently, through Council Decision 2021/2072/ CFSP, the EU has committed even further to strengthening biosafety and biosecurity capabilities in Africa, with more meaningful collaboration and an increase in the local and regional ownership of projects. This provides an opportunity for the EU to continue to broaden its approach and improve coordination with international partners. In particular focus is the newly formed European Health Emergency Preparedness and Response Authority (HERA), as it develops its international activities. However, there is still a demonstrated need to strengthen biosecurity-related capacities and capabilities across Africa. This paper highlights the significant opportunities for EU engagement and coordination with international initiatives, such as the Africa Centres for Disease Control and Prevention (Africa CDC) Biosafety and Biosecurity Initiative (BBI) 2021–2025 Strategic Plan and the Global Partnership Signature Initiative to Mitigate Biological Threats in Africa.
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Pritchard, Katrina, and Helen Williams. Pretty in Plastic: Aesthetic authenticity in Barbie Land. Swansea University, January 2024. http://dx.doi.org/10.23889/sureport.65542.

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Our report critically applies aesthetic authenticity as a theoretical lens to interrogate the multimodal reproduction of gendered relations in the Barbie (2023) movie. Recent research has focused on how the aesthetic authenticity stakes are being continually elevated, such that this requires ongoing labour and continual renegotiation. It is not surprising that even Barbie finds this exhausting! We offer an analysis of character arcs across the movie, before exploring how a plastic doll enables conceptual insight regarding aesthetic authenticity. We discuss how the movie reconfirms neoliberal postfeminist perspectives on how women should seek their happy ever after. Finally, we consider the implications of representations of patriarchy and matriarchy before setting out suggestions for future research and concluding our report.
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Singh, Priya, and Tanvi Bhatikar. Unpacking Marginalities 2024: IIHS Annual Research Conference Proceedings. Indian Institute for Human Settlements, 2024. http://dx.doi.org/10.24943/um2iarcp8.2024.

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Urban ARC is the Annual Research Conference of the Indian Institute for Human Settlements (IIHS). The eighth edition of the conference was conducted virtually and in person from 11 to 13 January 2023 and focussed on the theme ‘Unpacking Marginalities’. The panels and sessions explored, built on and continued ongoing conversations around the dynamism of marginalities that urban spaces have grown to house, bringing together various methods, questions asked, geographies covered, disciplines explored, and outcomes reached. These Conference Proceedings feature the extended abstracts submitted by the selected participants for Urban ARC 2024.
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Singh, Priya, and Vikas Singh. Beyond Binaries 2022: IIHS Annual Research Conference Proceedings. Indian Institute for Human Settlements, 2022. http://dx.doi.org/10.24943/9788195648597.

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Urban ARC is the Annual Research Conference of the Indian Institute for Human Settlements (IIHS). The sixth edition of the conference was conducted virtually from 13 to 15 January 2022 and focussed on the theme ‘Beyond Binaries: Towards new conceptual frameworks in the Urban’. The panels and sessions explored, built on and continued ongoing conversations around the idea of binaries, showcasing their fluidity, and the potential they offer for new conceptualizations. A wide range of themes, sectors, disciplines and methodologies was discussed. These Conference Proceedings feature the extended abstracts submitted by the selected participants for Urban ARC 2022.
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Wright, Jeffrey S. Field Artillery and the Combined Arms Team: A Case for the Continued Relevance of American Fire Support. Fort Belvoir, VA: Defense Technical Information Center, April 2015. http://dx.doi.org/10.21236/ad1001935.

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Ahmed AlGarf, Yasmine. From Self-Awareness to Purposeful Employment: Guiding Egyptian youth using arts-based learning. Oxfam IBIS, August 2021. http://dx.doi.org/10.21201/2021.7932.

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Alwan wa Awtar (A&A), a partner of the Youth Participation and Employment (YPE) programme, implements a youth programme supporting young people to shape their prospects through professional and soft skill development, safe learning space and non-formal education. A&A has learned important lessons throughout its journey. A safe learning environment, flexible learning techniques, visual and performing arts in education and participatory management are key approaches for successful youth programmes. During the COVID-19 period, many of the professional development programmes have been delivered online, which was a good example of adaptation to changing circumstances that ensured the sustainability and continued effectiveness of the programme.
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