Academic literature on the topic 'Lewis structure'

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Journal articles on the topic "Lewis structure"

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Purser, Gordon H. "Lewis Structures Are Models for Predicting Molecular Structure, Not Electronic Structure." Journal of Chemical Education 76, no. 7 (1999): 1013. http://dx.doi.org/10.1021/ed076p1013.

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Reed, James L. "The Lewis Structure: An Expanded Perspective." Journal of Chemical Education 71, no. 2 (1994): 98. http://dx.doi.org/10.1021/ed071p98.

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Mois�s, Bonilla E., and Michel Malabre. "Geometric characterization of Lewis Structure Algorithm." Circuits, Systems, and Signal Processing 13, no. 2-3 (1994): 255–72. http://dx.doi.org/10.1007/bf01188110.

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Harcourta, Richard D., and Thomas M. Klapötkeb. "Valence Bond Studies of N5+." Zeitschrift für Naturforschung B 57, no. 9 (2002): 983–92. http://dx.doi.org/10.1515/znb-2002-0903.

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The results of STO-6G valence-bond studies are reported for the six π-electrons of C2v symmetry N5+, with π-electron core charges determined from the valence bond structures. Important types of canonical Lewis structures are calculated to carry either three atomic formal charges, arranged spatially as (+), (-) and (+) , as in or a single (+) atomic formal charge, as in the “long-bond” structure When localized molecular orbitals are used to accommodate bonding electrons between pairs of adjacent atoms, each of these types of Lewis structures, and others, are components of the increased-valence
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Möricke, Jennifer, Birgit Wibbeling, Constantin G. Daniliuc, Gerald Kehr, and Gerhard Erker. "Design and reactions of a carbon Lewis base/boron Lewis acid frustrated Lewis pair." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 375, no. 2101 (2017): 20170015. http://dx.doi.org/10.1098/rsta.2017.0015.

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The conjugated dienamine 4 selectively adds Piers' borane [HB(C 6 F 5 ) 2 ] to give the enamine/borane system 5 , which features a boratirane structure by internal enamine carbon Lewis base to boron Lewis acid interaction. Compound 5 behaves as a C/B frustrated Lewis pair and undergoes typical addition reactions to benzaldehyde, several nitriles and to sulfur dioxide. This article is part of the themed issue ‘Frustrated Lewis pair chemistry’.
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Justyniak, Iwona, Daniel Prochowicz, Adam Tulewicz, Wojciech Bury, Piotr Goś, and Janusz Lewiński. "Structure investigations of group 13 organometallic carboxylates." Dalton Transactions 46, no. 3 (2017): 669–77. http://dx.doi.org/10.1039/c6dt03958h.

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The effect of both the relative magnitude of electrophilicity of metal centres and the character of a Lewis base on the molecular structure of the electron-precise [R<sub>2</sub>M(μ-O<sub>2</sub>CPh)]<sub>2</sub>-type carboxylates and their Lewis acid–base adducts [(R<sub>2</sub>M)(μ-O<sub>2</sub>CPh)(py-Me)] is reported.
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Brady, Joseph A., John N. Milbury-Steen, and John L. Burmeister. "Lewis structure skills: Taxonomy and difficulty levels." Journal of Chemical Education 67, no. 6 (1990): 491. http://dx.doi.org/10.1021/ed067p491.

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Miburo, Barnabe B. "Simplified Lewis Structure Drawing for Nonscience Majors." Journal of Chemical Education 75, no. 3 (1998): 317. http://dx.doi.org/10.1021/ed075p317.

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Lu, Dongmei, Yijin He, and Chao Wu. "Electronic structure of mono(Lewis base)-stabilized borylenes." Physical Chemistry Chemical Physics 21, no. 42 (2019): 23533–40. http://dx.doi.org/10.1039/c9cp04653d.

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Osmundsen, Christian M., Martin Spangsberg Holm, Søren Dahl, and Esben Taarning. "Tin-containing silicates: structure–activity relations." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 468, no. 2143 (2012): 2000–2016. http://dx.doi.org/10.1098/rspa.2012.0047.

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The selective conversion of biomass-derived substrates is one of the major challenges facing the chemical industry. Recently, stannosilicates have been employed as highly active and selective Lewis acid catalysts for a number of industrially relevant reactions. In the present work, four different stannosilicates have been investigated: Sn-BEA, Sn-MFI, Sn-MCM-41 and Sn-SBA-15. When comparing the properties of tin sites in the structures, substantial differences are observed. Sn-beta displays the highest Lewis acid strength, as measured by probe molecule studies using infrared spectroscopy, whic
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Dissertations / Theses on the topic "Lewis structure"

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Prickett, Mark Peter. "Probing the structure of Lewis X trisaccharide." Thesis, University of Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319046.

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Mafra, Lopes Junior Osvaldo. "Retrouver les structures de Lewis à partir des fonctions d'onde." Paris 6, 2010. http://www.theses.fr/2010PA066581.

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La difficulté pour interpréter les résultats issus de la mécanique quantique est toujours un souci pour les chimistes. Plusieurs méthodes ont été proposées pour extraire, à partir de fonctions d'onde, des images permettant au chimiste de mieux comprendre la structure électronique et les propriétés des molécules et des cristaux. C'est dans cette famille des méthodes interprétatives que rentre la méthode MPD développée au cours de cette thèse, qui consiste à chercher des domaines de l'espace pour lesquels la probabilité de trouver un nombre donné d'électrons est maximale. Cette recherche est un
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Bodensteiner, Michael [Verfasser]. "Lewis Acid-Base-Stabilized Phosphanylalanes : and Crystal Structure Determinations / Michael Bodensteiner." Saarbrücken : Südwestdeutscher Verlag für Hochschulschriften, 2012. https://www.svh-verlag.de.

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Ledoux, Audrey. "Lewis-pair amine-borane polymers as hydrogen reservoirs : structure/reactivity relationship." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1234/document.

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Le stockage et le relargage contrôlé du dihydrogène est devenu un domaine important de recherche visant à répondre à une demande énergétique grandissante. Bien que le borazane (NH3-BH3) ait été identifié comme un candidat de choix dû à sa grande capacité de stockage (16.9 wt.% H2), les chercheurs ont mis en évidence certaines limitations telles que des difficultés de mise en forme et des difficultés de régénération du matériau.Nous avons tenté de répondre à ces problématiques en concevant de nouveaux polymères contenant des fonctions de type amine-borane dans leur chaîne principale (polyborami
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Falcon, Bernardo Mechaca. "Structure and properties of PBZT/Nylon 6,6 blends processed via Lewis acid mediated solubilization." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/8522.

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Hair, Gregory Scott. "Synthesis, structure and reactivity of group 13 Lewis acids and group 4 metallocene zwitterions /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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Henry, Heather Marie. "Investigation of a triangle zone structure between Augusta and Bowman's Corners, Lewis and Clark County, Montana." CONNECT TO THIS TITLE ONLINE, 2007. http://etd.lib.umt.edu/theses/available/etd-05212007-104742/.

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Vergnaud, Jérôme. "Ligands ambiphiles pyridine/borane et phosphine/borane : synthèse, structure, coordination et réactivité." Toulouse 3, 2007. http://thesesups.ups-tlse.fr/67/.

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Cette thèse traite de l'utilisation de molécules dîtes ambiphiles, comportant à la fois un site donneur et accepteur d'électrons, en chimie organométallique, en tant que ligand. Dans le premier chapitre, une étude bibliographique décrit l'utilisation des acides de Lewis du groupe 13 en tant que co-catalyseur en chimie organométallique, afin de mieux comprendre quel rôle pourrait jouer celui-ci au sein d'un ligand ambiphile coordiné sur un métal de transition. Les différents modes de coordination de ces ligands sont examinés. Les rares contributions traitant de la réactivité de ce type de compl
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Francke, Loïc. "Préparation et caractérisation d'hydroxy-et d'oxyhydroxyfluorures d'aluminium, de fer ou de chrome : corrélation entre la composition / structure, la stabilité thermique et les propriétés acides." Bordeaux 1, 2002. http://www.theses.fr/2002BOR12567.

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Il s'agissait dans ce travail de préparer des composés fluorés de structure de type HTB ou hollandite au sein desquels la présence d'autres anions tels que OH- ou encore O2- viennent se substituer au fluor. Nous avons voulu dans ce travail mieux comprendre par une approche " chimie du solide " les propriétés de morphologie, de stabilité thermique et d'acidité des ces composés. Des études par diffraction neutronique couplées à une analyse par FTIR nous ont permis de mieux appréhender leurs propriété physico-chimiques. Nos résultats ont mis en avant les rôles joués par les cations, les anions et
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Yamashita, Hiroshi, Yoshinori Ogata, and Kazuhiro Yamamoto. "Flame structure and flame spread rate over a solid fuel in partially premixed atmospheres." Elsevier, 2011. http://hdl.handle.net/2237/20040.

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Books on the topic "Lewis structure"

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Yosemite National Park (Agency : U.S.), ed. Lewis Memorial Hospital historic structure report. [Architectural Resources Group], 2013.

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United States. National Park Service. Southeast Regional Office. Cultural Resources Division. Cape Lookout National Seashore: Lewis-Davis House : historic structure report. National Park Service, U.S. Department of the Interior, 2004.

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Cox, Richard A. V. The Gaelic place-names of Carloway, Isle of Lewis: Their structure and significance. School of Celtic Studies, Dublin Institute for Advanced Studies, 2002.

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Mumford, Lewis. Sidewalk critic: Lewis Mumford's writings on New York. Princeton Architectural Press, 1998.

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Mumford, Lewis. Sidewalk critic: Lewis Mumford's writings on New York. Princeton Architectural Press, 2000.

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Marlitt, Richard. Matters of proportion: The Portland residential architecture of Whidden & Lewis. Oregon Historical Society Press, 1989.

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Center, Lewis Research. Lewis Structures Technology - 1988: Proceedings of an exposition and symposium of structures technology developed under the auspices of NASA Lewis Research Center's Structures Division, Cleveland, Ohio, May 24-25, 1988. Lewis Research Center, 1988.

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Center, Lewis Research. Engine structures: A bibliography of Lewis Research Center's research for 1980-1987. Lewis Research Center, 1988.

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Kostura, William. William F. Lewis: A San Francisco house builder. Book Club of California, 1993.

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NASA Lewis Research Center Workshop on Forced Response in Turbomachinery (1993). NASA Lewis Research Center Workshop on Forced Response in Turbomachinery: Proceedings of a conference. National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1994.

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Book chapters on the topic "Lewis structure"

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Gooch, Jan W. "Lewis Structure." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_6885.

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Chen, Hui-Li. "Lewis Glyco-Epitopes: Structure, Biosynthesis, and Functions." In Advances in Experimental Medicine and Biology. Springer US, 2011. http://dx.doi.org/10.1007/978-1-4419-7877-6_4.

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Winter, Charles H., and Xiao-Xing Zhou. "Synthesis, Structure, and Reactivity of Highly Soluble Organotitanium Lewis Acids." In ACS Symposium Series. American Chemical Society, 1994. http://dx.doi.org/10.1021/bk-1994-0555.ch023.

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Weinhold, Frank, and John E. Carpenter. "The Natural Bond Orbital Lewis Structure Concept for Molecules, Radicals, and Radical Ions." In The Structure of Small Molecules and Ions. Springer US, 1988. http://dx.doi.org/10.1007/978-1-4684-7424-4_24.

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Haaland, Arne, and Mats Tilset. "Lewis and Kossel’s Legacy: Structure and Bonding in Main-Group Compounds." In The Chemical Bond II. Springer International Publishing, 2016. http://dx.doi.org/10.1007/430_2015_192.

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Sinclair, John McH. "Sense and structure in lexis." In Linguistics in a Systemic Perspective. John Benjamins Publishing Company, 1988. http://dx.doi.org/10.1075/cilt.39.05sin.

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Patterson, Christopher, Robert Dunsire, and Steven Hillier. "Development of Wave Energy Breakwater at Siadar, Isle of Lewis." In Coasts, marine structures and breakwaters: Adapting to change. Thomas Telford Ltd, 2010. http://dx.doi.org/10.1680/cmsb.41301.0065.

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Islam, Rizwanul. "Structural Transformation and Alternative Pathways to the Lewis Turning Point." In Rural Labour Mobility in Times of Structural Transformation. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5628-4_2.

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Hayashi, Shun. "Effect of Local Structures on Lewis Base Catalysis of [Nb10O28]6−." In Key Structural Factors of Group 5 Metal Oxide Clusters for Base Catalytic Application. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7348-4_4.

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Landis, Clark R., and Frank Weinhold. "Natural Bond Orbitals and Lewis-Like Structures of Copper Blue Proteins." In Modeling of Molecular Properties. Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527636402.ch6.

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Conference papers on the topic "Lewis structure"

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Weiher, Norbert, Anna Makarowicz, Angela M. Beesley, Erhard Kemnitz, and Sven L. M. Schroeder. "Structure-Property Relationships in Solid AlF3 Lewis Acids." In X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference. AIP, 2007. http://dx.doi.org/10.1063/1.2644677.

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"Effects of anthocyanin-rich grain diet on growth and metastasis of Lewis lung carcinoma in mice." In Bioinformatics of Genome Regulation and Structure/ Systems Biology. institute of cytology and genetics siberian branch of the russian academy of science, Novosibirsk State University, 2020. http://dx.doi.org/10.18699/bgrs/sb-2020-223.

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Ramadan, Bassem H. "Effect of Damkohler Number and Non-Unity Lewis Number on a Laminar Diffusion Flame." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45434.

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The effect of the Damkohler number (Da) and non-unity Lewis number on a two-dimensional, steady, laminar diffusion flame anchored by a dividing plate in a rectangular channel was considered. The governing equations were solved numerically, using the SIMPLE and ADI schemes. The results for non-unity Lewis number were compared with those for a unity Lewis number, and Da a was also varied in order to determine their effect on the flame structure. The results show that an increase in the Da causes the flame to exist closer to the trailing edge of the divider and to increase the reactivity. A non-u
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Phan, Hung, Thomas Kelly, Hieu Huynh, et al. "Tuning optical properties of conjugated molecules by Lewis acids: Insights from electronic structure modeling and machine learning." In Organic and Hybrid Sensors and Bioelectronics XIV, edited by Ruth Shinar, Ioannis Kymissis, and Emil J. List-Kratochvil. SPIE, 2021. http://dx.doi.org/10.1117/12.2594321.

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Li, Lei, Paul M. Jones, Alexei G. Merzlikine, and Yiao-Tee Hsia. "Effect of Molecular Weight (MW) and End-Groups on the Thermal and Lewis-Acid Catalyzed Decomposition of Fomblin Z-Type Lubricants." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63823.

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The high-temperature stability of disk lubricants has attracted a lot of interest in recent years because smaller head-media spacing may cause head-media contact and thus a local temperature rise. At elevated temperatures, the lubricant may either evaporate or decompose, leading to the eventual failure of the head-media interface. The decomposition might result from heating and/or may be catalyzed by the presence of a Lewis acid site at the head-disk interface (HDI). In this paper, we study how the chemical structure, namely, molecular weight (MW) and end-groups (see Fig. 1), of disk lubricant
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Ronney, Paul, Ming-Shin Wu, Howard Pearlman, and Karen Weiland. "Structure of Flame Balls At Low Lewis-number (SOFBALL) - Preliminary results from the STS-83 and STS-94 space flight experiments." In 36th AIAA Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics, 1998. http://dx.doi.org/10.2514/6.1998-463.

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Cossentine, Jay A., Jere J. Matty, and Robert J. Shaw. "The NPARC Alliance." In ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/95-gt-277.

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The Arnold Engineering Development Center (AEDC) and the NASA Lewis Research Center (LeRC) have formed a government alliance aimed at establishing and supporting a national, application-oriented computational fluid dynamics (CFD) capability, centered around the NPARC flow simulation software. The Alliance is supported by and responsive to an association made up of more that 100 active users at over 60 government, industry, and academic institutions. This paper discusses the history, structure, and philosophy of the NPARC Alliance.
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López-Juárez, Marcos, Xiaoxiao Sun, Bobby Sethi, Pierre Gauthier, and David Abbott. "Characterising Hydrogen Micromix Flames: Combustion Model Calibration and Evaluation." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14893.

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Abstract Hydrogen micromix combustion is a promising concept to reduce the environmental impact of both aero and land-based gas turbines by delivering carbon-free and ultra-low-NOx combustion without the risk of autoignition or flashback. The ENABLEH2 project aims to demonstrate the feasibility of such a switch to hydrogen for civil aviation, within which the micromix combustion, as a key enabling technology, will be matured to TRL3. The micromix combustor comprises thousands of small diffusion flames for which air and fuel are mixed in a cross-flow pattern. This technology is based on the ide
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Chamis, C. C., and D. A. Hopkins. "Probabilistic Structural Analysis Methods of Hot Engine Structures." In ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/89-gt-122.

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Development of probabilistic structural analysis methods for hot engine structures is a major activity at Lewis Research Center. It consists of three program elements: (1) composite load spectra methodology, (2) probabilistic structural analysis methodology, and (3) probabilistic structural analysis application. Recent progress includes: (1) quantification of the effects of uncertainties for several variables on High Pressure Fuel Turbopump (HPFT) turbine blade temperature, pressure, and torque of the Space Shuttle Main Engine (SSME), (2) the evaluation of the cumulative distribution function
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Chamis, Christos C. "NASA Lewis Research Center/University Graduate Research Program on Engine Structures." In ASME 1985 International Gas Turbine Conference and Exhibit. American Society of Mechanical Engineers, 1985. http://dx.doi.org/10.1115/85-gt-159.

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NASA Lewis Research Center established a graduate research program in support of the Engine Structures Research activities. This graduate research program focuses mainly on structural and dynamics analyses, computational mechanics, mechanics of composites and structural optimization. The broad objectives of the program, the specific program, the participating universities and the program status are briefly described.
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Reports on the topic "Lewis structure"

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Storesletten, Kjetil, Bo Zhao, and Fabrizio Zilibotti. Business Cycle during Structural Change: Arthur Lewis' Theory from a Neoclassical Perspective. National Bureau of Economic Research, 2019. http://dx.doi.org/10.3386/w26181.

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