Academic literature on the topic 'Dihedral angles'

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Journal articles on the topic "Dihedral angles"

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Horálek, Vratislav. "Stereology of dihedral angles." Applications of Mathematics 45, no. 6 (2000): 411–17. http://dx.doi.org/10.1023/a:1022329432636.

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MITAN, Carmen-Irena, Emerich BARTHA та Petru FILIP. "DISTANCES lHnHn+1[A0] CALCULATED FROM 3-SPHERE DIHEDRAL ANGLES θHnHn+1[deg]". Revue Roumaine de Chimie 69, № 10-12 (2024): 579–84. https://doi.org/10.33224/rrch.2024.69.10-12.07.

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Dihedral angles θHnHn+1[deg] calculated from NMR data with 3-Sphere approach, a method under Hopf fibration and Lie group theories, are angles in close relationship with vicinal angles ϕ[deg], angles result from vicinal coupling constant 3 JHnHn+1[Hz]. The signs of dihedral angles calculated with algebraic equations are demonstrated with A2 root system Lie group. In attempt to find the best model for visualization of the phase angle of the pseudorotation P[deg] the proton-proton distances lHH[A0 ] between two atoms of carbon consecutives are calculated from 3-Sphere dihedral angles θHnHn+1[deg
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Sugimoto, Nobuo, and Atsushi Minato. "Retroreflector with acute dihedral angles." Optics Letters 19, no. 20 (1994): 1660. http://dx.doi.org/10.1364/ol.19.001660.

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Oldmixon, E. H., J. P. Butler, and F. G. Hoppin. "Dihedral angles between alveolar septa." Journal of Applied Physiology 64, no. 1 (1988): 299–307. http://dx.doi.org/10.1152/jappl.1988.64.1.299.

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To determine the dihedral angle, alpha, at the characteristic three-way septal junctions of lung parenchyma, we examined photomicrographs of sections. The three angles, A, formed where three septal traces meet on section, were measured and found to range between approximately 50 and 170 degrees. Theoretical considerations predicted that the dispersion of alpha is much narrower than that of A. The mean of A and alpha is identically 120 degrees. The standard deviation of alpha was inferred from the cumulative distribution function of A. In lungs inflated to 30 cmH2O (VL30), the standard deviatio
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Atavin, E. G., and L. V. Vilkov. "Dihedral Angles in Cyclic Molecules." Journal of Structural Chemistry 44, no. 5 (2003): 846–51. http://dx.doi.org/10.1023/b:jory.0000029823.17159.0b.

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Gubernat, Agnieszka, and Ludosław Stobierski. "Dihedral angles in silicon carbide." Ceramics International 29, no. 8 (2003): 961–65. http://dx.doi.org/10.1016/s0272-8842(03)00053-1.

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Cho, Eung Chun. "Dihedral angles of n-simplices." Applied Mathematics Letters 5, no. 4 (1992): 55–57. http://dx.doi.org/10.1016/0893-9659(92)90087-p.

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-M. Schlenker, J. "Dihedral Angles of Convex Polyhedra." Discrete & Computational Geometry 23, no. 3 (2000): 409–17. http://dx.doi.org/10.1007/pl00009509.

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DERYABIN, Igor, Viktor GUZEEV, Alexander KOZLOV, and Dmitrii ARDASHE. "FEATURES OF PROCESSING AND ASSEMBLY OF COMPOSITE PRODUCTS." Machine Science Journal 11, no. 2 (2022): 37–43. http://dx.doi.org/10.61413/iwwe8712.

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The paper examines the assembling of cylindrical products consisting of sector parts with dihedral angles. A crucial issue in the assembly of such parts is the accuracy of dihedral angles during processing. Based on methods of analytical geometry, we proved that in order to achieve gapless assembly of three sectors, the sum of all dihedral angles of the sectors should be less than or equal to 360°. Since it is impossible to ensure the exact equality of the sum of all dihedral angles of 360°, characteristic “flatness deviation” is always formed during assembly. In order t obtain a gapless conne
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Suo, Yue, Ling Zhou, Huiling Zhu, and Lucheng Ji. "The influence of two different dihedral angles on diffuser performance based on LES." Journal of Physics: Conference Series 2820, no. 1 (2024): 012100. http://dx.doi.org/10.1088/1742-6596/2820/1/012100.

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Abstract The influence of two different dihedral angles on diffusion capability and flow separation in a diffuser was investigated in this study. Geometric models of straight-walled diffusers with dihedral angles of 90° and 108° were established. The mean and transient flow fields were obtained by using the large eddy simulation (LES) method. The research results show that increasing the dihedral angle enhances the diffusion capability of the diffuser and reduces the volume fraction of the mean separation zones for the diffusers with dihedral angles of 90° and 108°. Besides, hairpin vortexes a
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Dissertations / Theses on the topic "Dihedral angles"

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Almeida, Camila de. "An?lise da deforma??o p?s-Rifte na Bacia do Araripe, Nordeste do Brasil." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/18802.

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Made available in DSpace on 2015-03-13T17:08:28Z (GMT). No. of bitstreams: 1 CamilaA_DISSERT_1-52.pdf: 4763596 bytes, checksum: 04aa5b36a81ca3019e267dac640c6e31 (MD5) Previous issue date: 2010-02-25<br>The Araripe Basin is located over Precambrian terrains of the Borborema Province, being part of Northeast Brazil inner basins. Its origin is related to the fragmentation of the Gondwana supercontinent and consequently opening of South Atlantic during early Cretaceous. The basin has a sedimentary infill encompassing four distinct evolution stages, comprising Paleozoic syneclisis, pre-rift, ri
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Cote, Yoann. "Theory and molecular dynamics simulations of the local dynamics and free energy profiles of proteins : application to the interpretation of protein NMR data." Thesis, Dijon, 2012. http://www.theses.fr/2012DIJOS075.

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Comprendre la dynamique locale des protéines dans leur état natif (structure repliée etfonctionnelle) est essentiel pour comprendre leur dynamique globale et leur fonction biologique. Aucours de cette thèse, nous avons étudié la dynamique locale de plusieurs petites protéines enmesurant les fluctuations de sondes locales le long de la séquence d’acide aminé de ces protéines.Nous avons essayé de comprendre la dynamique de ces sondes locales, comment celles-ci serelaxaient entre leurs différentes conformations, comment leurs fluctuations étaient corrélées lesunes aux autres et comment peuvent-el
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Clements, Joseph Shelby II. "Synthesis of Insecticidal Mono- and Diacylhydrazines for Disruption of K+ Voltage-Gated Channels, and Elucidation of Regiochemistry and Conformational Isomerism by NMR Spectroscopy and Computation." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/77918.

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Based on the success of diacyl-tert-butylhydrazines RH-5849 and RH-1266 in controlling agricultural crop pests, we endeavored to synthesize our own diacylbenzyl- and arylhydrazine derivatives for use against the malaria vector Anopheles gambiae. In the process of producing a library of compounds for assay against An. gambiae, it became clear that employing regioselective acylation techniques (in molecules that feature two nucleophilic, acyclic nitrogen atoms α to one another) would be imperative. Synthesis of the library derivatives proceeded rapidly and after topical assay, we found three com
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Rasolofonjatovo, Evelia. "Conception, synthèse et évaluation biologique d’ analogues contraints de l’isocombrétastatine a-4 à visée antitumorale." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA114852.

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Les résistances aux traitements actuels contre le cancer imposent de trouver de nouvelles cibles thérapeutiques. Une de ces cibles est le réseau vasculaire assurant un apport suffisant en nutriments et en oxygène à la tumeur, et permettant l’apparition de métastases. Détruire la vascularisation de la tumeur par l’utilisation d’agents antivasculaires (VDA)revient à l’asphyxier et à l’affamer, inhibant ainsi la prolifération des cellules tumorales et empêchant le processus métastatique. L’objectif de ce travail de thèse a été d’étudier des analogues contraints de l’isocombrétastatine A-4 (isoCA-
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TSAI, Jie-Sung, та 蔡杰松. "Recognition of Protein α-helices and β-sheets with Dihedral Angles". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/15037125687227883656.

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碩士<br>國立中興大學<br>資訊科學系所<br>94<br>The prediction of the protein secondary structure helps biologists to evaluate the similarities between proteins with unknown 3D structures and those proteins with known 3D structures. In this study, we propose a new method based on dihedral angle vectors to recognize the regions of α-helices and β-sheets. First, we assume that the information of secondary structure of a protein could be conserved in the dihedral angle vectors of consecutive secondary structure sequences. And then, we apply the clustering method on the sets of dihedral angel vectors to gather gr
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Kuo, Nei-Jing, and 郭乃菁. "An Automatic Classification of Dihedral Angle Regions Using Structures-Based Profiles." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/72314111952893958907.

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碩士<br>逢甲大學<br>資訊工程所<br>98<br>Two of the well known protein, Φ and Ψ, values pair are usually plotted in a Ramachandran plot. And the concentrated areas in the plot, defined as dihedral angle regions, are known highly correlated to protein secondary structures. In recent studies, accurate prediction of protein dihedral angle regions was reported to be improved by using sequence-based and structure-based information as input features. As we know high sequence similarity of two proteins does not imply the same relationship of structural similarity. Therefore, take more structure information into
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Heng-TengChen and 陳恆燈. "Analysis and Discussion on Efficiency of Applying Dihedral Angle to Multi-rotor UAV." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/692p29.

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碩士<br>國立成功大學<br>航空太空工程學系<br>106<br>This research adopted dihedral angles for quadcopter design. A dihedral angle design could assist attitude subsystem to suppress its maximum overshoot, hence minimizes the body swing. According to the experiment conducted in this research, a dihedral angle design could reduce up to 24% of maximum overshoot. In this research, the advantages of a dihedral angle design is evaluated, and then calculate the state estimation of a standard quadcopter and quadcopters with different dihedral designs. Find the control target by deriving the Dynamic Equations. An experi
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Chen, Bo-Jian, and 陳柏堅. "Analysis of the Blade Dihedral Angle on the Power Output Effect of the Wind Turbine." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/56200011635781843311.

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碩士<br>國立屏東科技大學<br>機械工程系所<br>96<br>This research studies the effects of blade dihedral angle on the power output of a horizontal axis wind turbine. The purpose is to adjust the dihedral angle to reduce the power output of the blades, such that preventing damage the electric generator from over-speed the system. Both the blade element theory and momentum theory are used to develop the 3-dimensional blade shape, and then the Computational Fluid Dynamics (C.F.D.) method is introduced to resolve the flow-field details, and evaluate the performance of the system. The 3-dimensional blade shape is su
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Altis, Alexandros [Verfasser]. "Modeling the free energy landscape of biomolecules via dihedral angle principal component analysis of molecular dynamics simulations / von Alexandros Altis." 2008. http://d-nb.info/993966969/34.

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Begay, Shanadeen Crystal. "Thermodynamics and structure of methionine enkephalin using the statistical temperature molecular dynamics algorithm." Thesis, 2015. https://hdl.handle.net/2144/15704.

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Kim, Straub, and Keyes introduced the statistical temperature molecular dynamics (STMD) algorithm to overcome broken ergodicity by sampling a non­-Boltzmann flat energy histogram as noted in Kim, Straub, and Keyes, Phys. Rev. Lett. 97: 050601 (2007). Canonical averages are calculated via reweighting to the desired temperature. While STMD is promising, its application has been almost entirely to simple or model systems. In this dissertation the implementation of STMD into the biosimulation package CHARMM is used to simulate the methionine enkephalin pentamer peptide with a methione terminal cap
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Books on the topic "Dihedral angles"

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M, Ware George, and Langley Research Center, eds. Control effectiveness and tip-fin dihedral effects for the HL-20 lifting-body configuration at Mach numbers from 1.6 to 4.5. National Aeronautics and Space Administration, Langley Research Center, 1995.

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Book chapters on the topic "Dihedral angles"

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Souza, Michael, Carlile Lavor, and Rafael Alves. "Modeling the Molecular Distance Geometry Problem Using Dihedral Angles." In Bioinformatics Research and Applications. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59575-7_24.

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Cui, Xuefeng, Shuai Cheng Li, Dongbo Bu, Babak Alipanahi Ramandi, and Ming Li. "How Accurately Can We Model Protein Structures with Dihedral Angles?" In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33122-0_22.

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Ley-Koo, Eugenio, and Guo-Hua Sun. "Surface Effects in the Hydrogen Atom Confined by Dihedral Angles." In Electronic Structure of Quantum Confined Atoms and Molecules. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09982-8_1.

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Da Rocha, Wagner, Carlile Lavor, Leo Liberti, and Thérèse E. Malliavin. "Pseudo-dihedral Angles in Proteins Providing a New Description of the Ramachandran Map." In Lecture Notes in Computer Science. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-38299-4_53.

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Abouelaziz, Ilyass, Mohammed El Hassouni, and Hocine Cherifi. "No-Reference 3D Mesh Quality Assessment Based on Dihedral Angles Model and Support Vector Regression." In Lecture Notes in Computer Science. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-33618-3_37.

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Zimmermann, Olav. "Backbone Dihedral Angle Prediction." In Methods in Molecular Biology. Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-6406-2_7.

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Susanto, Adi, and Arif Wahjudi. "A Numerical Study for the Prediction of Unmanned Aerial Vehicle Aerodynamic Performance Based on Dihedral and Tip-Twist Angles of the Wing." In Recent Advances in Renewable Energy Systems. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1581-9_4.

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Diez, Mikel, Victor Petuya, Mónica Urizar, and Alfonso Hernández. "Protein Folding Pathways Implementing Dihedral Angle Variable Speed." In Latest Advances in Robot Kinematics. Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4620-6_35.

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Diez, Mikel, Víctor Petuya, Imanol Martínez, and Alfonso Hernández. "Protein Secondary Structure Detection Using Dihedral Angle Parameters Evaluation." In The 11th IFToMM International Symposium on Science of Mechanisms and Machines. Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-01845-4_13.

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Faraggi, Eshel, and Andrzej Kloczkowski. "Protein Secondary Structure Assignments and Their Usefulness for Dihedral Angle Prediction." In Springer Series on Bio- and Neurosystems. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95843-9_21.

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Conference papers on the topic "Dihedral angles"

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Wei, Fu-Shang, and David Peters. "Systematic Analysis of Rotor Blade Effective Twist Due to Planform Variation." In Vertical Flight Society 71st Annual Forum & Technology Display. The Vertical Flight Society, 2015. http://dx.doi.org/10.4050/f-0071-2015-10113.

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In a highly twisted blade combined with a variable chord, the effective thrust-weighted twist angle often differs from that of a rectangular blade under the same thrust conditions. Very few articles directly analyze the thrust-weighted effective twist angle as a function of blade planform changes. This paper introduces a design process to systematically predict rotor blade effective solidity and twist angle due to planform changes. Several planforms have been investigated, including blades with servo-flap, taper, dihedral, sweep and peddle tip. Interesting results are presented in the paper: i
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Subramanian, Raghavendran, and Kazem Kazerounian. "Residue Level Inverse Kinematics of Peptide Chains in the Presence of Observation Inaccuracies and Bond Length Changes." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84352.

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Dihedral angles as generalized coordinates define the geometric conformation of a peptide chain. Given the exact coordinates of the atoms, it is possible to rigorously calculate the dihedral angles. We will refer to this calculation process as the residue level inverse kinematics of peptide chains. However uncertainties and experimental observation inaccuracies in the atoms’ coordinates handicap this otherwise simple and straightforward process. In this paper, we present three new efficient methodologies to find all the dihedral angles of a peptide chain for a given conformation. Comparison of
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Xing, David, and Zhong You. "Constructing Scissor-Like Structures and Parallelogram Linkages With 4-Crease Single-Vertex Flat-Foldable Rigid Origami and Their Thick-Panel Versions." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97983.

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Abstract Scissor-like structures are commonly composed of two straight rigid supports in a crisscross pattern connected by a pivot at its point of intersection [1]. Opposite angles formed by the supports are equal regardless of the structure’s folded state. Parallelogram linkages have a similar property. Rigid origami can be used to create these structures by combining two identical copies of a 4-crease single-vertex flat-foldable rigid origami, a single 4C, to form a flat-foldable composite structure, a double 4C. In this paper, we prove mathematically that regardless of the folded state of a
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Musa, Nur Amalina, Shuhaimi Mansor, Airi Ali, and Mohd Hasrizam Che Man. "Effect of Tail Dihedral Angle on Lateral Directional Stability due to Sideslip Angles." In 53rd AIAA Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-1498.

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Roy, Bhaskar, P. A. Laxmiprasanna, Vishal Borikar, and Amit Batra. "Low Speed Studies of Sweep and Dihedral Effects on Compressor Cascades." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30441.

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The use of three dimensional blade designs incorporating end bend, sweep and dihedral to reduce secondary flow related losses, improve efficiency and stable operating range has gained ground in the recent years. In the present study a straight cascade, a swept cascade, and a dihedral cascade have been considered. Effects of sweep and dihedral along the span are studied at 0° and +20° stagger. The study shows that both the sweep and the dihedral have lower end-wall losses compared to the straight cascade. However, lower losses are accompanied with lower diffusion factors. At mid-span also the l
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Herndon, Joshua, and Sumi Singh. "Protein structural domain prediction based on dihedral and geometric angles." In 2017 IEEE International Conference on Bioinformatics and Biomedicine (BIBM). IEEE, 2017. http://dx.doi.org/10.1109/bibm.2017.8218012.

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Fei, Teng, Lucheng Ji, and Weilin Yi. "Investigation of the Dihedral Angle Effect on the Boundary Layer Development Using Special-Shaped Expansion Pipes." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-76383.

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The corners between the blades and end walls are common geometric structures in turbomachinery, where boundary layers on the blade and end wall surface interact with each other. This boundary layer interaction enlarges the region of low momentum fluid which leads to the boundary layers grow thicker at the corner region. Then the corner separation is likely to occur, and even worse by the adverse pressure gradient along the streamwise as well as secondary flows along the pitchwise. The key issue to design the geometric structures of the corner region is to control the dihedral angle between the
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Dong, Qiwen, Xin Geng, Shuigeng Zhou, and Jihong Guan. "Empirical Probability Functions Derived from Dihedral Angles for Protein Structure Prediction." In 2009 Ninth IEEE International Conference on Bioinformatics and BioEngineering (BIBE). IEEE, 2009. http://dx.doi.org/10.1109/bibe.2009.55.

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Miklosovic, D. S., and P. M. Bookey. "An Analytic and Experimental Investigation of the Aerodynamic Performance Enhancements of Multiple Winglet Configurations." In ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77255.

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An experimental effort was undertaken to assess the effectiveness and efficiency of three winglets mounted chordwise to the tip of a rectangular wing (NACA 0018 section). The winglets, with an aspect ratio of 3.6, were mounted on a half-span wing having an aspect ratio of 3.1. Twenty configurations of varying dihedral arrangements were analyzed with a vortex lattice method and tested in a low-speed wind tunnel at a Reynolds number of 600,000. In general, the arrangements involving high dihedral angles had lower performance increments, due to lower lift and higher interference drag. More specif
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Lee, Peter C., and Nesrin Sarigul-Klijn. "Preliminary Design Study of Biomimetic Multi-Winglets for Tip Vortex Splitting." In ASME 2024 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2024. https://doi.org/10.1115/imece2024-145241.

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Abstract Biomimetic designs draw inspiration from biological organisms for engineering design. This paper will study a design of multiple-piece winglets based on the wingtip feathers of birds. The biomimetic multi-winglet designs proposed in this work have the potential to improve aerodynamic performance. The hypothesis is that the designs cause splitting of the standard large single tip vortices into multiple, smaller tip vortices. This separation into smaller vortices have the potential to reduce induced effects. The proposed biomimetic multi-piece winglets have the following design paramete
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Reports on the topic "Dihedral angles"

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Verly, J. G. Physical Optics Polarization Scattering Matrix for a Right-Angle Dihedral. Defense Technical Information Center, 1995. http://dx.doi.org/10.21236/ada293036.

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