Готові списки джерел за темами / Tube of trajectories

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Добірка наукової літератури з теми "Tube of trajectories"

Автор: Grafiati

Опубліковано: 10 березня 2023

Оновлено: 31 липня 2025

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Статті в журналах з теми "Tube of trajectories"

YAZGI, Arzu, Vedat DEMİR, and Adnan DEĞİRMENCİOĞLU. "Comparison of computational fluid dynamics-based simulations and visualized seed trajectories in different seed tubes." TURKISH JOURNAL OF AGRICULTURE AND FORESTRY 44, no. 6 (2020): 599–611. http://dx.doi.org/10.3906/tar-1910-15.

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The objective of this study was to compare computational fluid dynamics (CFD)-based simulations and visualized seed trajectories in different seed tubes that can provide seed incorporation into the soil with enhanced seed spacing. The other objective was to determine the relation between the seed trajectories and peripheral speed of the vacuum disk. In order to meet the first objective, 2 different seeds (corn and cotton) and artificial spherical material (Ø10 mm) were tested under laboratory conditions. The seeds and artificial material were released by free fall into the semitransparent seed

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Wacławiak, Krzysztof, and Sylwester Kalisz. "Influence of Selected Parameters on Ash Particle Trajectories When Modelling Deposition on Superheater Tubes in Pulverised Coal Boilers Using Fluent Code." Chemical and Process Engineering 35, no. 3 (2014): 305–16. http://dx.doi.org/10.2478/cpe-2014-0023.

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Abstract Widely used CFD codes enable modelling of PC boilers operation. One of the areas where these numerical simulations are especially promising is predicting deposition on heat transfer surfaces, mostly superheaters. The basic goal of all simulations is to determine trajectories of ash particles in the vicinity of superheater tubes. It results in finding where on the surface the tube will be hit by particles, and what diameter and mass flow of the particles are. This paper presents results of CFD simulations for a single tube and a bundle of in-line tubes as well. It has been shown that a

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Garriga-Casanovas, Arnau, and Ferdinando Rodriguez y Baena. "Complete follow-the-leader kinematics using concentric tube robots." International Journal of Robotics Research 37, no. 1 (2017): 197–222. http://dx.doi.org/10.1177/0278364917746222.

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Concentric tube robots offer the capability of follow-the-leader motion, which is desirable when navigating in cluttered environments, such as in minimally invasive surgery or in-situ inspections. The follow-the-leader capabilities identified in the existing literature, however, are limited to trajectories with piecewise constant-curvature segments or piecewise helical segments. A complete study of follow-the-leader kinematics is, therefore, relevant to determine the full potential of these robots, and clarify an open question. In this paper, a general analysis of follow-the-leader motion is p

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Gabor, Grzegorz. "Periodic solutions for nonautonomous differential equations and inclusions in tubes." Abstract and Applied Analysis 2004, no. 12 (2004): 1057–79. http://dx.doi.org/10.1155/s1085337504403042.

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We study the existence of periodic trajectories for nonautonomous differential equations and inclusions remaining in a prescribed compact subset of an extended phase space. These sets of constraints are nonconvex right-continuous tubes not satisfying the viability tangential condition on the whole boundary. We find sufficient conditions for existence of viable periodic trajectories studying properties of the exit subset of the tube. A new approximation approach for continuous multivalued maps is presented.

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ISHII, Takahiro, and Junta DOI. "Tube Representation of Trajectories Using Spline Functions." Journal of the Visualization Society of Japan 11, Supplement2 (1991): 101–4. http://dx.doi.org/10.3154/jvs.11.supplement2_101.

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Nandan, Hemwati, and Akhilesh Ranjan. "Regge trajectories of exotic hadrons in the flux tube model." International Journal of Modern Physics A 31, no. 04n05 (2016): 1650007. http://dx.doi.org/10.1142/s0217751x1650007x.

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We have investigated the Regge trajectories of exotic hadrons by considering different possible pentaquark configurations with finite quark mass in the flux tube model. Significant deviation is observed in the linear behavior of the Regge trajectories for pentaquark systems in view of the universal value of the Regge slope parameter for hadrons. The modified Regge trajectories are also compared with the available experimental and lattice data. It is observed that the nonlinear Regge trajectories of such pentaquark systems can be well described by the relativistic corrections in view of the cur

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Choi, M., R. Greif, and H. R. Baum. "A Study of Heat Transfer and Particle Motion Relative to the Modified Chemical Vapor Deposition Process." Journal of Heat Transfer 111, no. 4 (1989): 1031–37. http://dx.doi.org/10.1115/1.3250764.

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Heat transfer and particle motion relative to the modified chemical vapor deposition process have been studied for general values of the torch speed. Three-dimensional temperature fields have been obtained over the entire cross section of the tube and the effects of tube rotation and localized torch heating in the axial and circumferential directions have been studied. The particle trajectories have been calculated from a formulation that includes the contributions from forced flow, i.e, Poiseuille flow in the axial direction, rigid body rotation about the tube axis, and thermophoretic contrib

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Bourgois, Auguste, Simon Rohou, Luc Jaulin, and Andreas Rauh. "Proving Feasibility of a Docking Mission: A Contractor Programming Approach." Mathematics 10, no. 7 (2022): 1130. http://dx.doi.org/10.3390/math10071130.

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Recent advances in computational power, algorithms, and sensors allow robots to perform complex and dangerous tasks, such as autonomous missions in space or underwater. Given the high operational costs, simulations are run beforehand to predict the possible outcomes of a mission. However, this approach is limited as it is based on parameter space discretization and therefore cannot be considered a proof of feasibility. To overcome this limitation, set-membership methods based on interval analysis, guaranteed integration, and contractor programming have proven their efficiency. Guaranteed integ

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Shen, Xiaobin, Chunhua Xiao, Yijun Ning, Huanfa Wang, Guiping Lin, and Liangquan Wang. "Research on the Methods for Obtaining Droplet Impingement Characteristics in the Lagrangian Framework." Aerospace 11, no. 3 (2024): 172. http://dx.doi.org/10.3390/aerospace11030172.

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The impact of supercooled water droplets is the cause of aircraft icing, and the acquisition of impingement characteristics is the key to icing prediction and the design of ice protection systems. The introduction of water droplet collection efficiency is required to obtain the characteristics for the Lagrangian method. In this work, a traditional flow tube method, a local flow tube method, and a statistical method are established to calculate the local collection efficiency, based on Lagrangian droplet trajectories. Through the numerical simulations of the air–droplet flow field around an NAC

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Dumbrajs, Olgerts. "ELECTRON TRAJECTORIES IN A REALISTIC GYROTRON RESONATOR." Mathematical Modelling and Analysis 3, no. 1 (1998): 74–80. http://dx.doi.org/10.3846/13926292.1998.9637088.

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Gyrotron is a special tube generating powerful radiowaves in the millimeter wave range. Gyrotrons are mainly used to heat nuclear fusion plasma, in order to induce controlled thermonuclear reactions on earth. In addition, they have found a wide utility in radars and the high‐temperature processing of materials. Differential equations describing gyrotron operation are analyzed from the mathematical point of view. Phase portraits of electron trajectories in realistic resonators are determined.

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Більше джерел

Дисертації з теми "Tube of trajectories"

Oke, Isdin. "Concentric Tube Robotics: Non-Linear Trajectories for Epilepsy Surgery." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:27007762.

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Recurrent and unprovoked epilepsy seizures affect more than 50 million people worldwide. Despite advances in antiepileptic drugs, more than 30% of patients continue to demonstrate abnormal neuronal activity; at present, this is primarily treated with surgical intervention1,2. In 80% of patients with medically intractable seizures, the epileptic focus is located in the medial temporal lobe and neurosurgical treatment of these foci requires large skin incisions, extensive bone removal, and potentially harmful excision of brain tissue, several times the size of the epileptic focus3. Minimally in

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Pena, Luciana Prado Mouta. "Análise de um método para equação de convecção formulado à luz da mecânica dos meios contínuos a advecção de anomalias oceânicas e meteorológicas." Universidade do Estado do Rio de Janeiro, 2006. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=872.

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No presente trabalho estudamos e analisamos o método do Tubo de Trajetórias, um algoritmo conservativo, explícito, simples, fisicamente intuitivo, semi-Lagrangiano para equação de convecção. Mostramos que o método é incondicionalmente estável, essencialmente não-dispersivo, convergente e acurado de ordem 2 no tempo e no espaço. Soluções numéricas de sistemas e equações diferenciais ordinárias são testadas no contexto do método do Tubo de Trajetórias, com difíceis problemas clássicos. Aplicações são consideradas no âmbito do transporte oceânico e na advecção de frentes atmosféricas. A fim de te

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Wu, Chun-Kuan, and 吳俊寬. "The Simulation and Analysis of Electron Trajectories in the X-Ray Tube." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/74033078924688824967.

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Jacquier, Vanessa. "Metastability for serial and parallel dynamics." Doctoral thesis, 2022. http://hdl.handle.net/2158/1274534.

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Metastability is an ubiquitous phenomenon in nature. It appears in a plethora of diverse fields including physics, chemistry, biology, computer science, climatology and economics. Metastability is best described as a dynamical phenomenon that occurs when a system is close to a first order phase transition. After changing some thermodynamic parameters, the system remains for a considerable (random) time in the old phase, the metastable state, before suddenly making a transition to the new phase, the stable state. In other words, on a short time scale, the system behaves as if it was in equilibr

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Книги з теми "Tube of trajectories"

Sulmasy, Daniel. The Ethics of Medically Assisted Nutrition and Hydration at the End of Life. Edited by Stuart J. Youngner and Robert M. Arnold. Oxford University Press, 2016. http://dx.doi.org/10.1093/oxfordhb/9780199974412.013.14.

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This chapter examines the ethics of medically supplying nutrition and hydration to dying patients. It first considers the available treatment modalities for patients who are unable to eat or drink, including nasogastric tube feeding, percutaneous endoscopic gastrostomy tube feeding, surgical gastrostomy or jejunostomy tube feeding, proctoclysis, intravenous hydration and nutrition, total or partial parenteral nutrition, and hypodermoclysis. Before discussing the ethics of their use in palliative medicine, the medical aspects of these techniques as well as their risks and benefits are outlined.

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Частини книг з теми "Tube of trajectories"

Niyaz, Sherdil, Alan Kuntz, Oren Salzman, Ron Alterovitz, and Siddhartha Srinivasa. "Following Surgical Trajectories with Concentric Tube Robots via Nearest-Neighbor Graphs." In Springer Proceedings in Advanced Robotics. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-33950-0_1.

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Szabo, Victor. "Coda: Ambient Music in the 21st Century." In Turn On, Tune In, Drift Off. Oxford University PressNew York, 2022. http://dx.doi.org/10.1093/oso/9780190699307.003.0006.

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Abstract A coda to the book considers how today’s ambient music is transforming, and how it may continue to transform, into a more inclusive, aesthetically dynamic, and socially enriching genre culture. Through a series of audio spotlights, it offers some insights into the many promising directions ambient artists have explored since the turn of the twenty-first century. After taking stock of the book’s history of ambient music’s psychedelic past and analysis of ambient’s formation as a popular genre, the coda proposes these recent works as trajectories from which to imagine a more expansive p

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Lancaster, Lynne C. "Two Terracotta Vaulting Elements." In Building the Classical World. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780190690526.003.0009.

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Imperial Rome had some of the most innovative vaulted architecture from the ancient world, but even before the Imperial period, builders were experimenting by creating new ways of using terracotta vaulting elements, usually in the context of bath buildings. This chapter examines the origins of two of them: vaulting tubes and armchair voussoirs. The initial uses of both techniques developed in response to the need for creating fire- and moisture-proof ceilings over the hot rooms of bath buildings at a time before concrete technology had developed. The roots of both techniques go back to the 3rd

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Тези доповідей конференцій з теми "Tube of trajectories"

Sabau, Adrian S., John P. Shingledecker, and Ian G. Wright. "Steam-Side Oxide Scale Exfoliation Behavior in Superheaters and Reheaters: Differences in the Behavior of Alloys T22, T91 and TP347 Based on Computer Simulation Results." In AM-EPRI 2010, edited by D. Gandy, J. Shingledecker, and R. Viswanathan. ASM International, 2010. http://dx.doi.org/10.31399/asm.cp.am-epri-2010p0213.

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Abstract Advances in materials for power plants include not only new materials with higher-temperature capabilities, but also the use of current materials at increasingly higher temperatures. This latter activity builds on extensive experience of the performance of the various alloys, and provides a basis for identifying changes in alloy behavior with increasing temperature as well as understanding the factors that ultimately determine the maximum use temperatures of the different alloy classes. This paper presents results from an effort to model the exfoliation processes of steam-side oxide s

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Puscas, Mihai Marian, Enver Sangineto, Dubravko Culibrk, and Nicu Sebe. "Unsupervised Tube Extraction Using Transductive Learning and Dense Trajectories." In 2015 IEEE International Conference on Computer Vision (ICCV). IEEE, 2015. http://dx.doi.org/10.1109/iccv.2015.193.

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Li, Linlin, Guoying Gu, and Li-Min Zhu. "Motion Control of the Piezoelectric Tube Scanner for Lissajous Trajectories with Modified Repetitive Control." In 2018 International Conference on Manipulation, Automation and Robotics at Small Scales (MARSS). IEEE, 2018. http://dx.doi.org/10.1109/marss.2018.8481174.

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Thanganadar, Dhinesh, Nigel Simms, Kumar Patchigolla, Stefano Mori, and Anand Kulkarni. "A Detailed Modelling of Deposition on Superheater Tubes to Enhance Boiler Flexibility." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-82282.

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Abstract Biomass cofiring in coal-fired power plants is a promising way to reduce CO2 emissions from existing coal plants. However, the changes in the fuel composition influence the ash deposition mechanisms on superheater tubes, therefore negatively impacting the boiler efficiency, as well as promoting corrosion which compromises the life of the boiler tubes. The continuous fluid flow combined with the ash particle trajectories has been simulated using a Eulerian-Lagrangian model. A novel alkali vapour condensation model has been added to the previous in-house powdery dry deposition model. Th

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Fournier, Guillaume J. J., Felicitas Schaefer, Matthias Haeringer, Camilo F. Silva, and Wolfgang Polifke. "Interplay of Clusters of Acoustic and Intrinsic Thermoacoustic Modes in Can-Annular Combustors." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-80785.

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Abstract Thermoacoustic systems can exhibit self-excited instabilities of two nature, namely cavity modes or intrinsic thermoacoustic (ITA) modes. In heavy-duty land-based gas turbines with canannular combustors, the cross-talk between cans causes the cavity modes of various azimuthal order to create clusters, i.e. ensembles of modes with close frequencies. Similarly, in systems exhibiting rotational symmetry, ITA modes also have the peculiar behavior of forming clusters. In the present study, we investigate how such clusters interplay when they are located in the same frequency range. We firs

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Vardelle, M., A. Vardelle, B. Dussoubs, et al. "Influence of Injector Geometry on Particle Trajectories: Analysis of Particle Dynamics in the Injector and Plasma Jet." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p0887.

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Abstract The conditions of particle injection into the side of plasma jets play an important role in determining the microstructure and properties of sprayed deposits. However, few investigations have been carried out on this topic. The current work presents the results of an experimental and computational study of the influence of injector geometry and gas mass flow rate on particle dynamics at injector exit and in the plasma jet. Two injector geometries were tested: a straight tube and a curved tube with various radii of curvature. Zirconia powders with different particle size range and morp

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Peters, John E., ,. Daniel S. Esser, Abby M. Grillo, Nithin S. Kumar, Robert J. Webster III, and Eric J. Barth. "Toward In-Scanner Transforamenal Epilepsy Interventions: A Compact MR-Safe Concentric Tube Actuation System." In The Hamlyn Symposium on Medical Robotics. The Hamlyn Centre Imperial College London, 2024. http://dx.doi.org/10.31256/hsmr2024.41.

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Epilepsy affects more than 50 million people world- wide, afflicting patients with debilitating seizures. While antiepileptic drugs are available, 20-40% of patients remain medically refractory, leaving surgical interven- tion as the remaining option [1]. Hippocampal resec- tion is the gold standard surgical therapy, while laser interstitial thermal therapy (LITT) offers a minimally invasive alternative. Current LITT interventions involve delivery of thermal energy via a straight laser probe through a burr hole in the back of the skull under the guidance of magnetic resonance imaging (MRI). LI

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Epelbaum, Greg. "Corrosion Study and Modification of Superheater Tubes in a Large Mass Burn WTE Boiler (Abstract)." In 13th Annual North American Waste-to-Energy Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/nawtec13-3143.

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Essex County Resource Recovery Facility (one of American Ref-Fuel Company’s six operating plants) has processing MSW capacity of approximately 2700 TPD and about 60% of this waste comes from NY City. Therefore, availability of the Essex plant boilers is very important not only for the company’s financial performance, it is also critical for the overall garbage disposal situation in the NYC Metropolitan area. One of the main factors affecting plant availability is boiler unscheduled downtime. The most recent data show that approximately 85% of Essex boilers unscheduled downtime is caused by tub

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Luxat, J. C. "Dynamic Sensitivity Analysis of Thermal-Mechanical Deformation of a CANDU Fuel Channel." In 16th International Conference on Nuclear Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/icone16-48656.

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In a limiting critical break loss of coolant accident in a CANDU reactor significant degradation of heat transfer from the fuel can occur. As a result of the subsequent increase in fuel temperature it is possible that the pressure tube undergoes heat up at intermediate pressure during blowdown. This can result in ballooning deformation of the pressure tube into contact with its calandria tube. It is required that fuel channels not fail as a consequence of the thermal mechanical deformation of the pressure tube and calandria tube in such events. Dynamic sensitivity functions are derived as anal

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Sivathanu, Yudaya R., and Jay P. Gore. "Radiative Heat Transfer Inside a Cylindrical Enclosure With Nonparticipating Media Using a Deterministic Statistical Method." In ASME 1996 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/imece1996-0038.

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Abstract The radiative heat transfer inside a cylindrical enclosure is modeled using a discrete probability function method. The discrete probability function method involves solution of the equation of radiative heat transfer using Lagrangian simulations of representative photon trajectories on a discrete spatial grid. The DPF method is applied to radiation exchange in a cylindrical tube which has a hot source at one end and a detector at the other end. The cylindrical wall absorbs and reflects (both diffusely and specularly) the radiation incident on it. The calculations are used to simulate

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Звіти організацій з теми "Tube of trajectories"

Weiland, Mark A., Robert P. Mueller, Thomas J. Carlson, Zhiquan Deng, and Craig A. McKinstry. Characterization of Bead Trajectories Through the Draft Tube of a Turbine Physical Model. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/15011275.

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Weiland, M. A., R. P. Mueller, T. J. Carlson, Z. D. Deng, and C. A. McKinstry. Characterization of bead trajectories through the draft tube of a turbine physical model. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/1218122.

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Peggs, Stephen, and T. Satogata. Resonance trajectories and island tune spectra in the tune domain. Office of Scientific and Technical Information (OSTI), 2024. http://dx.doi.org/10.2172/2477574.

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