Bibliografías temáticas / Simple elements

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Literatura académica sobre el tema "Simple elements"

Autor: Grafiati
Publicado: 10 de marzo de 2023

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Artículos de revistas sobre el tema "Simple elements"

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Di Tullio, Maria Camilla. "Traditional Hindu Elements in Kiran Desai’s The Inheritance of Loss". Le Simplegadi, n.º 18 (noviembre de 2018): 180–90. http://dx.doi.org/10.17456/simple-106.

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Brenner, Susanne C. "Preconditioning Complicated Finite Elements by Simple Finite Elements". SIAM Journal on Scientific Computing 17, n.º 5 (septiembre de 1996): 1269–74. http://dx.doi.org/10.1137/s1064827594277065.

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Choi, Jong Keun y Jang Keun Lim. "Simple curved shear beam elements". Communications in Numerical Methods in Engineering 9, n.º 8 (agosto de 1993): 659–69. http://dx.doi.org/10.1002/cnm.1640090805.

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Liu, S. "A finite element analysis procedure using simple quadrilateral plate/shell elements". Computers & Structures 32, n.º 5 (enero de 1989): 937–44. http://dx.doi.org/10.1016/0045-7949(89)90396-9.

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Spence, Ian. "Visual psychophysics of simple graphical elements." Journal of Experimental Psychology: Human Perception and Performance 16, n.º 4 (1990): 683–92. http://dx.doi.org/10.1037/0096-1523.16.4.683.

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Karen, Pavel. "Most pressurized elements aren’t simple cubic". Physics Today 61, n.º 9 (septiembre de 2008): 10. http://dx.doi.org/10.1063/1.2982101.

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Legut, Dominik, Martin Friák y Mojmír Šob. "Most pressurized elements aren’t simple cubic". Physics Today 61, n.º 9 (septiembre de 2008): 10–11. http://dx.doi.org/10.1063/1.4796933.

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Cohen, Arjeh M., Gábor Ivanyos y Dan Roozemond. "Simple Lie algebras having extremal elements". Indagationes Mathematicae 19, n.º 2 (junio de 2008): 177–88. http://dx.doi.org/10.1016/s0019-3577(09)00003-2.

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Lemelin, Guylain y Roger A. Lessard. "Simple semi continuous holographic optical elements". Canadian Journal of Physics 71, n.º 9-10 (1 de septiembre de 1993): 417–22. http://dx.doi.org/10.1139/p93-065.

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Using a binary computer-generated hologram (BCGH) made of different thin stripes, one can modify its phase and amplitude pattern and in turn correct and redirect a scanning beam. If the scanning beam is larger than one single stripe, the segmented phase function looks like a continuous one for the incident beam and a smooth curve is reconstructed in space. We show a very simple BCGH that permits the study of the interesting characteristics of this type of computer generated hologram (CGH) at low cost. Numerical as well as experimental results are discussed. This method is very promising in developing large-scale CGHs, holographic display systems, and optical interconnects.
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Chuang, C. L. y P. H. Lee. "Unitary Elements in Simple Artinian Rings". Journal of Algebra 176, n.º 2 (septiembre de 1995): 449–59. http://dx.doi.org/10.1006/jabr.1995.1253.

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Tesis sobre el tema "Simple elements"

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Starkloff, Hans-Jörg. "Stochastic finite element method with simple random elements". Universitätsbibliothek Chemnitz, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200800596.

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We propose a variant of the stochastic finite element method, where the random elements occuring in the problem formulation are approximated by simple random elements, i.e. random elements with only a finite number of possible values.
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Mackenzie, Donald. "A study on simple piping elbow finite elements". Thesis, University of Strathclyde, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336119.

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Lundqvist, Erik. "Simple volumes : - Spatial complexity". Thesis, KTH, Arkitektur, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263060.

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In this thesis project, I have explored ways to reach spatial complexity through the use of a simple system of volumetric building elements. The ambition has been to draw an apartment building with emphasis on a variety in the apartment layouts as well as to let the functions of circulation, which I define as both shared and private functions such as stairs, elevators and passages, become an integrated part of the architectural expression. The volumetric building element, with proportions derived from our infrastructural norms as it requires transformation on a truck, is today an ubiquitous object or even an architectural typology of its own. When they are assembled, it can both become a system of similar parts or one new, larger object. The project has then also been a search for an architectural ambivalence between hiding and exposing the fact that a building is the outcome of a system.
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Gunther, Jan-Stefan. "The flexible, low-tech environment : a kit of simple architectural elements". Virtual Press, 2002. http://liblink.bsu.edu/uhtbin/catkey/1231349.

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This creative project focuses on the research, planning, design and field-testing of a kit of basic architectural elements that can be used to build simple spaces and small constructions. These elements are reusable, easy to handle, and allow for a nearly infinite number of configurations.The environment in which the system was developed is a setting of an improvisational outdoor theatre, called 'Live-Action-Role-playing-Games'- (LARP). Therefore the system does not provide a high quality indoor space, but rather focuses on the critical requirements of theatrical stages, such as flexibility, ease of erection and variety. Additionally, the system dealt with the pragmatic issues of affordability and cost-effectiveness.The design process commenced with great attention being paid to the very special requirements of LARP and attempting to test initial assumptions. It included two surveys of LARP participants and use of charrettes to incorporate users input into the design process. Prototype elements were then constructed and field-tested during a full-scale replication of an actual LARP-event over afour-day testing period.Following this an evaluation was made, lessons were learned, and the information gained was incorporated in to the final design.This document then records the entire design process and concludes with extensive documentation of the system.
Department of Architecture
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Niland, Haven Sierra. "The Effects of Common and Uncommon Elements on the Emergence of Simple Discriminations". Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1505220/.

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A computerized program was designed to test whether arranging a common element in two, otherwise independent, 2-term correlations (stimulus-stimulus and response-stimulus) would result in emergent simple discriminative-stimulus properties for the antecedent stimulus relative to an arrangement with no common elements programmed. Data from 8 adult participants in this experiment indicate that common element arrangements led to relatively high rates of responding in the presence of the putative discriminative stimulus and relatively low rates or no responding in the presence of the putative s-delta during testing in extinction. Conversely, the uncommon element arrangements produced no clear discriminative control. The current data reflect a comparison of arrangements across subjects. These data support Sidman's (2000) suggestion that common elements among contingencies are sufficient to produce stimulus classes and cause class mergers. The data also have implications for thinking about the mechanism by which and the conditions under which discriminative control develops. Finally, these data have the potential to inform the programming and implementation of reinforcement contingencies in applied settings.
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Llorens, Sulivera Joan. "Experimental study of simple and multi-leaf masonry slender elements under compressive stress loaded parallel to the face". Doctoral thesis, Universitat de Girona, 2020. http://hdl.handle.net/10803/671027.

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The thin-tile vault is a structural system widely used in the Mediterranean area. The most spectacular development took place through modernist-style buildings designed by architects such as Antonio Gaudí o Luís Domènech and Muntaner among the others. Thin-tile vault, from a morphological standpoint, is made up of one or more leaf of thin-tile lay flat, and joined with plaster or mortar. As a particularity of this arrangement, the load is applied parallel to the face of the thin-tile as opposed to the load-bearing walls masonry, where the load is applied perpendicularly to it. Deepening the knowledge of this type of masonry is the main objective of this thesis. In masonry, normally the compressive strength of the constituent materials is used to analytically establish the compressive strength of the masonry. This thesis, and based on the experimental results on one-, two- , and three-leaf thin-tile specimens, analyse stress-strain law, failure modes, and mechanical properties and compared with those corresponding to different masonries presented in the literature
La volta catalana és un sistema estructural àmpliament utilitzat en l'àrea mediterrània. Es a través d'edificis d'estil modernista d’arquitectes com Antoni Gaudí o Lluís Domènech i Muntaner que presenta el seu màxim esplendor. La volta catalana, des d'un vessant morfològica, està constituïda per una combinació d'una o diverses fulles de rajoles col·locades planes, i unides amb guix o morter. Una particularitat d'aquesta fàbrica és l’aplicació de la càrrega paral•lela a la cara de la rajola en contraposició a la fàbrica de rajol de parets on aquesta és aplicada perpendicular. Aprofundir en el coneixement d’aquest tipus de fàbrica es el principal objectiu d’aquesta tesis. En fàbrica, habitualment la determinació analítica de la resistència a compressió es determina a partir dels materials constituents (peça i morter). La tesi, i a partir dels resultats experimentals sobre provetes de fàbrica de rajola d'una, dues i tres fulles, analitza el comportament tensió-deformació, el mode de falla i les propietats mecàniques i els compara amb diferents fàbriques presents en la literatura
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Ramaccini, Giovanna Verfasser], Alexander von [Akademischer Betreuer] [Kienlin y Paolo [Akademischer Betreuer] Belardi. "Perugia in particular. The architectural survey of simple elements in the historic city / Giovanna Ramaccini ; Alexander von Kienlin, Paolo Belardi". Braunschweig : Technische Universität Braunschweig, 2019. http://d-nb.info/1191365441/34.

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Ramaccini, Giovanna [Verfasser], Alexander von [Akademischer Betreuer] Kienlin y Paolo [Akademischer Betreuer] Belardi. "Perugia in particular. The architectural survey of simple elements in the historic city / Giovanna Ramaccini ; Alexander von Kienlin, Paolo Belardi". Braunschweig : Technische Universität Braunschweig, 2019. http://d-nb.info/1191365441/34.

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GRADWOHL, GERARD. "Les doigt a zinc de la poly(adp-ribose) polymerase, elements de reconnaissance de coupures simple brin dans l'adn : etude structurale et fonctionnelle". Université Louis Pasteur (Strasbourg) (1971-2008), 1991. http://www.theses.fr/1991STR13012.

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La poly(adp-ribosyl)ation est une modification post-traductionnelle des proteines impliquee dans la modulation de la structure de la chromatine et dans les mecanismes de reparation de l'adn chez les eucaryotes. La poly(adp-ribose) polymerase (parp) qui catalyse la reaction est fortement stimulee par la presence de coupures dans l'adn. En reponse a ces signaux et en presence de nad#+ comme substrat, l'enzyme catalyse la polymerisation de l'unite adp-ribose du nad#+ en un homopolymere, le poly(adp-ribose). Ce polymere est attache de facon covalente a des proteines nucleaires acceptrices. Le travail presente ici concerne l'etude des interactions parp-adn au niveau moleculaire et leurs consequences sur la stimulation de l'activite enzymatique. Les resultats obtenus montrent que la parp contient deux ions zinc localises dans un fragment n-terminal de 29 kda inclus dans le domaine de liaison a l'adn de l'enzyme. Les experiences de protection a la dnase i ont demontre que la parp se fixe specifiquement par le domaine de liaison du zinc a une coupure simple brin dans l'adn, de facon zinc dependante. Ces resultats sont en accord avec la presence de deux motifs hypothetiques (fi et fii) de doigt a zinc (cys-x#2-cys-x#2#8#,#3#0-his-x#2-cys)#2 dans le polypeptide 29 kda de la sequence humaine. Par mutagenese dirigee, nous avons identifie les ligands du zinc et analyse la consequence de l'alteration de la structure des doigts sur la liaison a l'adn et la stimulation de l'activite enzymatique. Il apparait que le doigt a zinc fii determine la specificite de reconnaissance des coupures simple brin dans l'adn et que fi est absolument requis pour la stimulation de l'activite enzymatique par les interruptions dans l'adn. Ces resultats suggerent que la parp contient un nouveau type de doigt a zinc, en terme de structure et de fonction. La parp au meme titre que d'autres proteines impliquees dans les mecanismes
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Pescatore, Jeremie. "Maillages Homotopiques tétraèdriques des tissus de la tête pour le calcul du probleme direct en magnéto/electro-encephalographie". Phd thesis, Télécom ParisTech, 2001. http://tel.archives-ouvertes.fr/tel-00005670.

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L'électroencéphalographie (E.E.G.) et la magnétoencéphalographie (M.E.G.) permettent de mesurer à la surface de la tête des champs électromagnétiques résultant des activités neuronales du cerveau. La localisation des sources d'activités neuronales à partir des signaux mesurés à la surface de la tête nécessite de modéliser la propagation des champs électromagnétiques à l'intérieur des tissus de la tête. Cette modélisation consiste à résoudre les équations de Maxwell pour toutes les configurations de sources neuronales possibles par des techniques de calcul numérique (intégrale de surface, différence finies et éléments finis), qui nécessitent de disposer d'un maillage surfacique ou volumique des tissus et d'affecter à chaque élément du maillage une valeur de conductivité électrique du tissu correspondant. L'objectif de cette thèse est de construire des modèles réalistes des tissus de la tête sous forme de maillages tétraédriques adaptés aux méthodes d'éléments finis. Ces maillages tétraédriques sont construits à partir de données anatomiques individuelles obtenues en imagerie par résonance magnétique (I.R.M.). Nous montrons, tout d'abord, l'importance que revêt une modélisation volumique des tissus de la tête, en particulier pour la M.E.G. et l'E.E.G. Ainsi, nous mettons en évidence les contraintes géométriques et topologiques que doit respecter un maillage voumique pour la résolution du problème direct en M.E.G. et E.E.G. à partir de la méthode des éléments finis. Dans ce cadre, nous proposons alors de développer une méthode de maillage volumique fondée sur une décomposition spatiale du domaine d'interêt suivie de transformations préservant la topologie. Dans les méthodes aux éléments finis, la qualité des tétraèdres influence la précision du calcul numérique. En effet, des tétraèdres avec un mauvais rapport de forme produisent des matrices mal conditionnées. Nous montrons qu'il est possible de construire des tétraédrisations presques régulières (T.P.R.) de l'espace où tous les tétraèdres sont identiques et ont des arêtes presque égales. Nous introduisons, ensuite, une caractérisation originale des déformations homotopiques d'un objet discret s'appuyant sur un maillage tétraédrique. Nous avons étendu la notion d'éléments simples par rapport aux trames discrètes classiques (pixels et voxels) des images numériques en appliquant des résultats issus de la théorie de l'homologie au cas des maillages tétraédriques. De nombreux outils locaux peuvent être utilisés à des fins d'adaptation de maillages tétraédriques. C'est pourquoi, nous présentons une adaptation fondée sur des modifications locales d'une T.P.R. et contrôlant la taille des arêtes. La dernière partie de ce manuscrit présente une méthode de maillage volumique des tissus de la tête s'appuyant sur les propriétés topologiques et géométriques que nous avons exposées précédemment. Ainsi, nous construisons d'abord une T.P.R. à partir d'une I.R.M. segmentée des tissus de la tête dont le nombre d'éléments est compatible avec le coût d'une F.E.M. puis nous effectuons un étiquetage homotopique du maillage où nous attribuons à chaque tétraèdre une étiquette optimale fonction de son contenu tissulaire et des contraintes topologiques. Une des originalités de notre méthode de maillage volumique réside dans la notion de région homotopiquement déformable qui permet d'injecter dans un maillage volumique des connaissances a priori topologiques sur les objets à mailler. Ces maillages permettent également de construire des maillages surfaciques adaptés aux méthodes d'intégrales de frontière sans risques d'intersection entre les surfaces de tissus proches. Des premiers tests effectués à la Pitié-Salpétrière ont d'ailleurs montré l'adéquation entre les maillages proposés et la résolution du problème direct en M.E.G. et E.E.G.
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Libros sobre el tema "Simple elements"

1

Photoshop elements in simple steps. Harlow, Eng: Pearson Prentice Hall, 2009.

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Hoyle, Julia. Elements of banking made simple. London: Heinemann, 1987.

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Bluttman, Ken. Photoshop elements 8 in simple steps. Harlow, Eng: Pearson Education, 2010.

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Krenk, Steen. Optimal formulation of simple finite elements. Roskilde, Denmark: Riso National laboratory, 1985.

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Bluttman, Ken. Photoshop elements 8 in simple steps. Harlow, Eng: Pearson Education, 2010.

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Bluttman, Ken. Photoshop elements 9 in simple steps. Harlow, England: Pearson Education, 2011.

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Photoshop elements 8 in simple steps. Harlow, Eng: Pearson Education, 2010.

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1960-, Testerman Donna M., ed. Centres of centralizers of unipotent elements in simple algebraic groups. Providence, R.I: American Mathematical Society, 2010.

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Joanie's quilting elements: 7 simple steps to navigate and stitch. Iola, WI: Krause Publications, 2008.

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Bruce, Judith. Fundamental elements of the quality of care: A simple framework. New York: Population Council, Programs Division, 1989.

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Capítulos de libros sobre el tema "Simple elements"

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Calvo-López, José. "Simple Elements". En Mathematics and the Built Environment, 221–39. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-43218-8_4.

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Prathap, G. "Simple Curved Beam Elements". En The Finite Element Method in Structural Mechanics, 73–98. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-017-3319-9_3.

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Adams, Barry G. "Perturbation Matrix Elements". En Algebraic Approach to Simple Quantum Systems, 265–80. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-57933-2_14.

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Cook, Robert D. "Interpolation, Simple Elements, Convergence, Stress Calculation". En Lecture Notes in Engineering, 71–119. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-83535-3_4.

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Liebeck, Martin y Gary Seitz. "Distinguished unipotent elements". En Unipotent and Nilpotent Classes in Simple Algebraic Groups and Lie Algebras, 299–316. Providence, Rhode Island: American Mathematical Society, 2012. http://dx.doi.org/10.1090/surv/180/19.

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Liebeck, Martin y Gary Seitz. "Standard distinguished nilpotent elements". En Unipotent and Nilpotent Classes in Simple Algebraic Groups and Lie Algebras, 169–202. Providence, Rhode Island: American Mathematical Society, 2012. http://dx.doi.org/10.1090/surv/180/13.

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Liebeck, Martin y Gary Seitz. "Exceptional distinguished nilpotent elements". En Unipotent and Nilpotent Classes in Simple Algebraic Groups and Lie Algebras, 203–18. Providence, Rhode Island: American Mathematical Society, 2012. http://dx.doi.org/10.1090/surv/180/14.

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Grijalva, Juan G., Edson R. De Pieri y Daniel Martins. "Dual-quaternion on simple scissor-like elements". En Advances in Mechanism and Machine Science, 449–58. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20131-9_45.

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Jacobson, N. "Nilpotent Elements in Semi-simple Jordan Algebras". En Nathan Jacobson Collected Mathematical Papers, 367–78. Boston, MA: Birkhäuser Boston, 1989. http://dx.doi.org/10.1007/978-1-4612-3694-8_25.

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Elliott, George A. "Normal Elements of a Simple C*-Algebra". En Algebraic Methods in Operator Theory, 109–23. Boston, MA: Birkhäuser Boston, 1994. http://dx.doi.org/10.1007/978-1-4612-0255-4_13.

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Actas de conferencias sobre el tema "Simple elements"

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Smith, Andrew Cyrus. "Simple tangible language elements for young children". En the 8th International Conference. New York, New York, USA: ACM Press, 2009. http://dx.doi.org/10.1145/1551788.1551860.

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Balfour, Leslie S. "Simple thermal model for natural background elements". En Optical Engineering in Israel: 9th Meeting, editado por Itzhak Shladov, Yitzhak Wiessman y Natan Kopeika. SPIE, 1995. http://dx.doi.org/10.1117/12.211178.

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Lin, Hai. "A simple wavefront re-construction optical elements combination". En Frontiers in Optics. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/fio.2016.jw4a.50.

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Franck, Jerome B. y Van A. Hodgkin. "Simple design considerations for binary optical holographic elements". En San Diego, '91, San Diego, CA, editado por Ivan Cindrich y Sing H. Lee. SPIE, 1991. http://dx.doi.org/10.1117/12.50622.

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Zhuang, Zhenfeng, Hongjuan Wang, Phil Surman y Xiao Wei Sun. "Viewable floating displays using simple secondary optical elements". En 2015 Visual Communications and Image Processing (VCIP). IEEE, 2015. http://dx.doi.org/10.1109/vcip.2015.7457918.

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Tang, Xiaodong. "A Simple and Efficient Large-Displacement Formulation for Beam Elements". En ASME 1991 International Computers in Engineering Conference and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/cie1991-0109.

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Abstract A simple and effective finite element formulation of beam-column stiffness matrix with the consideration of second-order displacement is presented. The derived second-order stiffness matrix is the simple addition of the small-displacement stiffness matrix and a few other component matrices. The matrix is derived closed form and no integration is necessary during the formation of the element stiffness matrix. The simple additive relation makes it easy to understand the composition of the second-order stiffness matrix and the meaning of each component matrix. The closed-form formulation eliminates the potential numerical error and considerably reduces the amount of computation thereby, increasing the computing speed. The standard finite element approach presented in this paper makes the beam-column compatible with other finite elements and can be incorporated into existing finite element programs with little modification. The analysis of a simply supported beam with axial restraints using the beam-column element shows a good correlation with the test results.
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Hussein, M., J. Zhou, Y. Huang, A. P. Sohrab y M. Kod. "Frequency selective surface with simple configuration stepped-impedance elements". En 2016 10th European Conference on Antennas and Propagation (EuCAP). IEEE, 2016. http://dx.doi.org/10.1109/eucap.2016.7481584.

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Yan, Fei, Peng Yang, Feng Yang y Hai jing Zhou. "A simple wideband dual-polarized array with connected elements". En 2013 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2013. http://dx.doi.org/10.1109/aps.2013.6711456.

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Hembree, Charles, Joshua Hanson, Biliana Paskaleva, Pavel Bochev, Eric Keiter, Alan Mar y Ting Mei. "Semiconductor Device Models Constructed Using Simple Elements and Auxiliary Dynamics ." En Proposed for presentation at the Mechanistic Machine Learning and Digital Twins for Computational Science, Engineering & Technology held September 26-29, 2021 in San Diego, CA. US DOE, 2021. http://dx.doi.org/10.2172/1890913.

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Sorensen, Christian Buhl y Esben Skovsen. "Rapid Prototyping of Simple Optical Elements for the Terahertz Domain". En 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, 2019. http://dx.doi.org/10.1109/irmmw-thz.2019.8874045.

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Informes sobre el tema "Simple elements"

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Franck, Jerome B. y Van A. Hodgkin. Some Simple Design Considerations for Binary Optical Holographic Elements. Fort Belvoir, VA: Defense Technical Information Center, enero de 1991. http://dx.doi.org/10.21236/ada241989.

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Netid, Mihai. CONSTRUCTION AND ARRANGEMENT OF DEFORMATION-EXPANSION JOINTS OF BRIDGES WITH SIMPLE SUPPORTING ELEMENTS SUPERSTRUCTURE. Intellectual Archive, abril de 2019. http://dx.doi.org/10.32370/iaj.2074.

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Netid, Mihai. GENERAL TRENDS IN THE EXECUTION OF DEFORMATION JOINTS AT THE ROAD BRIDGES WITH THE SIMPLE SUPPORTING ELEMENTS SUPERSTRUCTURE. Intellectual Archive, abril de 2019. http://dx.doi.org/10.32370/iaj.2073.

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Brenan, J. M., K. Woods, J. E. Mungall y R. Weston. Origin of chromitites in the Esker Intrusive Complex, Ring of Fire Intrusive Suite, as revealed by chromite trace element chemistry and simple crystallization models. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328981.

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To better constrain the origin of the chromitites associated with the Esker Intrusive Complex (EIC) of the Ring of Fire Intrusive Suite (RoFIS), a total of 50 chromite-bearing samples from the Black Thor, Big Daddy, Blackbird, and Black Label chromite deposits have been analysed for major and trace elements. The samples represent three textural groups, as defined by the relative abundance of cumulate silicate phases and chromite. To provide deposit-specific partition coefficients for modeling, we also report on the results of laboratory experiments to measure olivine- and chromite-melt partitioning of V and Ga, which are two elements readily detectable in the chromites analysed. Comparison of the Cr/Cr+Al and Fe/Fe+Mg of the EIC chromites and compositions from previous experimental studies indicates overlap in Cr/Cr+Al between the natural samples and experiments done at >1400oC, but significant offset of the natural samples to higher Fe/Fe+Mg. This is interpreted to be the result of subsolidus Fe-Mg exchange between chromite and the silicate matrix. However, little change in Cr/Cr+Al from magmatic values, owing to the lack of an exchangeable reservoir for these elements. A comparison of the composition of the EIC chromites and a subset of samples from other tectonic settings reveals a strong similarity to chromites from the similarly-aged Munro Township komatiites. Partition coefficients for V and Ga are consistent with past results in that both elements are compatible in chromite (DV = 2-4; DGa ~ 3), and incompatible in olivine (DV = 0.01-0.14; DGa ~ 0.02), with values for V increasing with decreasing fO2. Simple fractional crystallization models that use these partition coefficients are developed that monitor the change in element behaviour based on the relative proportions of olivine to chromite in the crystallizing assemblage; from 'normal' cotectic proportions involving predominantly olivine, to chromite-only crystallization. Comparison of models to the natural chromite V-Ga array suggests that the overall positive correlation between these two elements is consistent with chromite formed from a Munro Township-like komatiitic magma crystallizing olivine and chromite in 'normal' cotectic proportions, with no evidence of the strong depletion in these elements expected for chromite-only crystallization. The V-Ga array can be explained if the initial magma responsible for chromite formation is slightly reduced with respect to the FMQ oxygen buffer (~FMQ- 0.5), and has assimilated up to ~20% of wall-rock banded iron formation or granodiorite. Despite the evidence for contamination, results indicate that the EIC chromitites crystallized from 'normal' cotectic proportions of olivine to chromite, and therefore no specific causative link is made between contamination and chromitite formation. Instead, the development of near- monomineralic chromite layers likely involves the preferential removal of olivine relative to chromite by physical segregation during magma flow. As suggested for some other chromitite-forming systems, the specific fluid dynamic regime during magma emplacement may therefore be responsible for crystal sorting and chromite accumulation.
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Choi, Yoojin, Nathan M. Stall, Antonina Maltsev, Chaim M. Bell, Isaac I. Bogoch, Tal Brosh, Gerald A. Evans et al. Lessons Learned from Israel’s Vaccine Rollout. Ontario COVID-19 Science Advisory Table, febrero de 2021. http://dx.doi.org/10.47326/ocsat.2021.02.09.1.0.

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As Ontario expands access to the COVID-19 vaccine beyond the Phase 1 priority populations, strategic planning and execution of mass vaccine rollout will have a significant impact on the health and safety of Ontario’s 14.5 million residents. There are six key elements of Israel’s successful COVID-19 vaccine campaign that can be readily applied to Ontario to expedite and expand the province’s vaccine rollout strategy: a simple vaccine prioritization process; modification to the transport, storage, and distribution of the vaccines; effective communication to promote vaccine confidence; decentralization of vaccination sites; centralized organization through Health Maintenance Organizations (HMOs) using a fully integrated information technology (IT) system in a universal health care system; and the engagement of community-based personnel, infrastructure, and resources.
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Kharchenko, Yuliya V., Olena M. Babenko y Arnold E. Kiv. Using Blippar to create augmented reality in chemistry education. CEUR Workshop Proceedings, julio de 2021. http://dx.doi.org/10.31812/123456789/4630.

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This paper presents an analysis of the possibilities and advantages of augmented reality technologies and their implementation in training of future Chemistry and Biology teachers. The study revealed that the use of augmented reality technologies in education creates a number of advantages, such as: visualization of educational material; interesting and attractive learning process; increasing student motivation to study and others. Several augmented reality applications were analyzed. The Blippar app has been determined to have great benefits: it’s free; the interface is simple and user-friendly; the possibility of using different file types; the possibility of combining a large amount of information and logically structuring it; loading different types of information: video, images, 3D models, links to sites, etc. Thus, convenient interactive projects were developed using the Blippar application, which were called study guide with AR elements, and implemented in teaching chemical disciplines such as Laboratory Chemical Practice and Organic Chemistry. Using such study guide with AR elements during classes in a real chemical laboratory is safe and does not require expensive glassware. The student interviews revealed that the use of the Blippar application facilitated new material understanding, saved time needed to learn material, and was an effective addition to real-life learning.
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Or, Dani, Shmulik Friedman y Jeanette Norton. Physical processes affecting microbial habitats and activity in unsaturated agricultural soils. United States Department of Agriculture, octubre de 2002. http://dx.doi.org/10.32747/2002.7587239.bard.

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experimental methods for quantifying effects of water content and other dynamic environmental factors on bacterial growth in partially-saturated soils. Towards this end we reviewed critically the relevant scientific literature and performed theoretical and experimental studies of bacterial growth and activity in modeled, idealized and real unsaturated soils. The natural wetting-drying cycles common to agricultural soils affect water content and liquid organization resulting in fragmentation of aquatic habitats and limit hydraulic connections. Consequently, substrate diffusion pathways to soil microbial communities become limiting and reduce nutrient fluxes, microbial growth, and mobility. Key elements that govern the extent and manifestation of such ubiquitous interactions include characteristics of diffusion pathways and pore space, the timing, duration, and extent of environmental perturbations, the nature of microbiological adjustments (short-term and longterm), and spatial distribution and properties of EPS clusters (microcolonies). Of these key elements we have chosen to focus on a manageable subset namely on modeling microbial growth and coexistence on simple rough surfaces, and experiments on bacterial growth in variably saturated sand samples and columns. Our extensive review paper providing a definitive “snap-shot” of present scientific understanding of microbial behavior in unsaturated soils revealed a lack of modeling tools that are essential for enhanced predictability of microbial processes in soils. We therefore embarked on two pronged approach of development of simple microbial growth models based on diffusion-reaction principles to incorporate key controls for microbial activity in soils such as diffusion coefficients and temporal variations in soil water content (and related substrate diffusion rates), and development of new methodologies in support of experiments on microbial growth in simple and observable porous media under controlled water status conditions. Experimental efforts led to a series of microbial growth experiments in granular media under variable saturation and ambient conditions, and introduction of atomic force microscopy (AFM) and confocal scanning laser microscopy (CSLM) to study cell size, morphology and multi-cell arrangement at a high resolution from growth experiments in various porous media. The modeling efforts elucidated important links between unsaturated conditions and microbial coexistence which is believed to support the unparallel diversity found in soils. We examined the role of spatial and temporal variation in hydration conditions (such as exist in agricultural soils) on local growth rates and on interactions between two competing microbial species. Interestingly, the complexity of soil spaces and aquatic niches are necessary for supporting a rich microbial diversity and the wide array of microbial functions in unsaturated soils. This project supported collaboration between soil physicists and soil microbiologist that is absolutely essential for making progress in both disciplines. It provided a few basic tools (models, parameterization) for guiding future experiments and for gathering key information necessary for prediction of biological processes in agricultural soils. The project sparked a series of ongoing studies (at DTU and EPFL and in the ARO) into effects of soil hydration dynamics on microbial survival strategy under short term and prolonged desiccation (important for general scientific and agricultural applications).
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Foucar, James G., Richard Roy Drake, David M. Hensinger y Thomas Anthony Gardiner. Pamgen, a library for parallel generation of simple finite element meshes. Office of Scientific and Technical Information (OSTI), abril de 2008. http://dx.doi.org/10.2172/932881.

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Bender, J. M. A Simple Screw Thread Model for Use in Finite Element Stress Analysis. Fort Belvoir, VA: Defense Technical Information Center, julio de 1989. http://dx.doi.org/10.21236/ada210233.

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Hicks, Jacqueline. Examples of 'Systems Thinking' Projects in International Development. Institute of Development Studies, marzo de 2022. http://dx.doi.org/10.19088/k4d.2022.067.

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A “systems thinking” (ST) approach generally recognises that international development processes are complex, inter-related, non-linear, and constantly changing. They involve many different types of actors, all with different levels of power. ST change methods try to mirror these qualities, and move away from more conventional project design and implementation that use simple linear input-output-impact project logic. Thus, this rapid literature review seeks to find out what are some examples of ‘systems thinking’ projects in international development. The aim of this rapid review is to provide concrete examples of how ST shows up in the project design and management processes that are typically used by people working in the international development sector. These include project management arrangements, evaluation indicators, results frameworks, budget allocations and procurement, country diagnostics, and the foundational analysis that informs project design. The examples found were mostly extracted from donor project documents. Different definitions of ST may emphasise different elements. An attempt was made to find a range of projects from different sectors, and to go beyond projects that exemplified “Market Systems Development” and “Adaptive Management,” for which there are already repositories of project examples (see Further Resources).The inclusion of the projects in this review does not imply that they were successful, only that they contain some evidence of ST in them. Most of the projects identified have a further library of documents, including evaluations, that give more detailed information about their successes and failures.
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