Academic literature on the topic 'Thrist'

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Journal articles on the topic "Thrist"

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Wells, J. C. K. "Thrift: a guide to thrifty genes, thrifty phenotypes and thrifty norms." International Journal of Obesity 33, no. 12 (September 15, 2009): 1331–38. http://dx.doi.org/10.1038/ijo.2009.175.

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Horgan, John. "The Threat of Buried Thrust Faults." Scientific American 270, no. 4 (April 1994): 113. http://dx.doi.org/10.1038/scientificamerican0494-113.

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le Polain, Maïté, Olivier Sterck, and Marthe Nyssens. "Interest Rates in Savings Groups: Thrift or Threat?" World Development 101 (January 2018): 162–72. http://dx.doi.org/10.1016/j.worlddev.2017.09.001.

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Glen, R. A. "Thrusts and thrust-associated mineralization in the Lachlan Orogen." Economic Geology 90, no. 6 (October 1, 1995): 1402–29. http://dx.doi.org/10.2113/gsecongeo.90.6.1402.

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Huh, Hyub, Doo Yeon Go, Jang Eun Cho, Jihoon Park, Jiwon Lee, and Hyun-Chang Kim. "Influence of two-handed jaw thrust during tracheal intubation on postoperative sore throat: a prospective randomised study." Journal of International Medical Research 49, no. 2 (February 2021): 030006052096123. http://dx.doi.org/10.1177/0300060520961237.

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Objective General anaesthesia with tracheal intubation results in sore throat. We evaluated the influence of the two-handed jaw thrust on postoperative sore throat in patients who require tracheal intubation. Methods In this prospective, double-blind, single-centre, parallel-arm, and randomised trial, 92 patients who were scheduled for general anaesthesia for total hip arthroplasty were allocated to one of two groups. In the jaw thrust group (n = 46), the two-handed jaw thrust manoeuvre was applied at intubation. In the control group (n = 46), conventional intubation with sham jaw thrust was performed. Incidences of airway morbidities including sore throat, hoarseness, and cough at 2, 4, and 24 hours postoperatively were compared. Results During the postoperative 24 hours, the incidence of sore throat (8 [17%] vs. 20 [44%]) and hoarseness were lower in the jaw thrust group (8 [17%] vs. 18 [39%]) compared with the control group. The incidence of cough during the postoperative 24 hours was similar between the groups. Conclusions The jaw thrust manoeuvre significantly reduced sore throat and hoarseness in patients after general anaesthesia using tracheal intubation. Clinical trial registration: NCT 03568279.
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Wu, Kexin, and Heuy Dong Kim. "Study on Fluidic Thrust Vector Control Based on Dual-Throat Concept." Journal of the Korean Society of Propulsion Engineers 23, no. 1 (February 1, 2019): 24–32. http://dx.doi.org/10.6108/kspe.2019.23.1.024.

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Shin, Choon Sik, Heuy Dong Kim, Toshiaki Setoguchi, and Shigeru Matsuo. "A computational study of thrust vectoring control using dual throat nozzle." Journal of Thermal Science 19, no. 6 (December 2010): 486–90. http://dx.doi.org/10.1007/s11630-010-0413-x.

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Ahmad, Sadeem, Antony S. K. Sravankumar, Shobha P. Kruparani, and Rajan Sankaranarayanan. "Cloning, expression, purification, crystallization and preliminary X-ray crystallographic analyses of threonyl-tRNA synthetase editing domain fromAeropyrum pernix." Acta Crystallographica Section F Structural Biology and Crystallization Communications 68, no. 11 (October 30, 2012): 1390–93. http://dx.doi.org/10.1107/s1744309112042066.

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The proofreading function of aminoacyl-tRNA synthetases is crucial in maintaining the fidelity of protein synthesis. Most archaeal threonyl-tRNA synthetases (ThrRSs) possess a unique proofreading domain unrelated to their eukaryotic/bacterial counterpart. The crystal structure of this domain from the archaeonPyrococcus abysiiin complex with its cognate and noncognate substrate analogues had given insights into its catalytic and discriminatory mechanisms. To probe further into the mechanistic and evolutionary aspects of this domain, work has been extended to another archaeonAeropyrum pernix. The organism possesses two proteins corresponding to threonyl-tRNA synthetase,i.e.ThrRS1 and ThrRS2, encoded by two different genes,thrS1andthrS2, respectively. ThrRS1 is responsible for aminoacylation and ThrRS2 for proofreading activity. Here the purification, crystallization and preliminary X-ray crystallographic investigation of the N-terminal proofreading domain of ThrRS2 fromA. pernixis reported. The crystals belong to either theP41212 orP43212 space group and consist of one monomer per asymmetric unit.
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Andréasson, P. G., and A. Rodhe. "Where are the thrusts of the Grenvillian Thrust Front in southern Sweden?" Geologiska Föreningen i Stockholm Förhandlingar 110, no. 4 (December 1988): 379. http://dx.doi.org/10.1080/11035898809452675.

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Yagle, P. J., D. N. Miller, K. B. Ginn, and J. W. Hamstra. "Demonstration of Fluidic Throat Skewing for Thrust Vectoring in Structurally Fixed Nozzles." Journal of Engineering for Gas Turbines and Power 123, no. 3 (January 1, 2001): 502–7. http://dx.doi.org/10.1115/1.1361109.

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The experimental demonstration of a fluidic, multiaxis thrust vectoring (MATV) scheme is presented for a structurally fixed, afterburning nozzle referred to as the conformal fluidic nozzle (CFN). This concept for jet flow control features symmetric injection around the nozzle throat to provide throttling for jet area control, and asymmetric injection to subsonically skew the sonic plane for jet vectoring. The conceptual development of the CFN was presented in a companion paper (Miller et al. [1]). In that study, critical design variables were shown to be the flap length and expansion area ratio of the nozzle, and the location, angle, and distribution of injected flow. Measures of merit were vectoring capability, gross thrust coefficient, and discharge coefficient. A demonstration of MATV was conducted on a 20 percent scale CFN test article across a range of nozzle pressure ratios (NPR), injector flow rates, and flow distributions. Both yaw and pitch vector angles of greater than 8 deg were obtained at NPR of 5.5. Yaw vector angles greater than 10 deg were achieved at lower NPR. Values of thrust coefficient for the CFN generally exceeded published measurements of shock-based vectoring methods. In terms of vectoring effectiveness (ratio of vector angle to percent injected flow), fluidic throat skewing was found to be comparable to shock-based vectoring methods.
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Dissertations / Theses on the topic "Thrist"

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Jolly, Byami Andrew. "The interaction between deepwater channel systems and growing thrusts and folds, toe-thrust region of the deepwater Niger Delta." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/18409.

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The Niger Delta fold and thrust belt occurs in an area of tectonic shortening – caused by the thin-skinned gravitational collapse of large deltaic sediment wedges above a ductile overpressured shale. Syn-sedimentary processes such as down-slope flowing gravity currents interact with the deforming seafloor topography to produce growth packages that record the deformation history of the folds. The thesis documents the spatial and temporal interaction between Pleistocene to Recent submarine channels, and folds/thrusts that have been growing since 12.8 million years ago (Ma). 3D seismic reflection data and key stratigraphic/horizon ages are used to constrain and analyse the spatial and temporal variation in shortening of major folds having seabed relief. Geomorphic techniques were applied to quantify the geomorphic responses of submarine channels developing coevally with structural deformation. This thesis documents two types of structures (fault-propagation folds and a detachment fold) whose cumulative strain (shortening) varies spatially and through time. The maximum interval shortening rate occurred between 9.5 Ma and 3.7 Ma, and has reduced significantly from that time to present. Channels show a range of interactions with structures, from simple deflection to fold tips to complete diversion. However, channels are capable of crossing the actively growing fault-propagation folds in positions of recent strain minima and at interval strain rates that are generally less than 15 m/Myr. In contrast, channels have been completely diverted by the broad detachment fold albeit growing at comparably lower rates. This thesis emphasizes that careful fold displacement – distance measurements which bracket the time interval of channel system development are very important for predicting sediment pathways in deepwater settings. Detailed geomorphic analysis showed that the bathymetry longitudinal profiles of the active channels are relatively linear with concavity values that range from -0.08 to ̵ 0.34, with an average profile gradient between 0.9[degrees] and 1[degrees]. In contrast, channel systems that have been abandoned and buried for long period of time, have longitudinal profiles that are more convex. The profiles of both the active and buried channels are characterized by knickzones that are apparent near mapped structures – and implicitly record variations in substrate uplift rate. The recently active channels (the modern thalweg) show no systematic width change down-system but they do show an increase in incision depth/erosion of up to 70 % at structural locations. However, the channel system (made of several cut-and-fill sequences), shows clear width narrowing together with time-integrated incision and erosion in response to time-integrated structural uplift. Estimates of the down-system variation in channel bed-shear stress and flow velocity, using the thalweg-geometry of the active channels, suggests that near growing folds and thrusts, the enhanced bed-shear stress-driven incision is up to 200 Pa. and the flow velocity is up to 5 m s-1. In essence, the linear nature of the active channel profiles, in comparison to the convex nature of the buried channel profiles, suggests that the active channels are able to keep pace with the time-integrated uplift of folds and thrusts, and therefore appear to be in topographic steady-state with respect to structural uplift since at least 1.7 Ma. Facies analysis using the seismic data showed that the main seismic facies include: (i) channel axes sands and top-channel sands (ii) sheet-sands or crevasse splays (iii) slump deposits and (iv) pelagic drapes. The growth of structures with seabed relief has affected the location of channel avulsion, the locus and the deposition/distribution of sheet-sands (splays). These splays can spill over the growing fault-propagation folds in areas of lower fold growth rates, and absence of seabed scarps; but are completely blocked, and subsequently incorporated onto the limb of a broad detachment fold in the east of the study area as incoming channels are forced to divert through time. This thesis has contributed to the understanding of: (1) Deformation by thrust-related folds that have been growing since ca. 12 Ma, and attained maximum interval growth rates between 9.5 Ma and 3.7 Ma. These maximum growth rates have reduced significantly in the last 3.7 million years during which submarine channels that are generally less than 1.3 million years old also occurred. (2) How modern seabed channels (i.e., recently active channels) have responded to the time-integrated growth of structures along their paths; and the related effect on the positioning of channels pathways, which in-turn, governs the depositional system – especially the distribution of sands in the toe-thrust area of the deepwater Niger Delta. (3) The time-integrated channel system erosivity, the evolution of the channel system geometry and the channel system fill as these systems interact with active structures through time. (4) How submarine channels in the deepwater Niger Delta achieve, and maintain bathymetric steady-state over periods of approximately 1 – 1.3 million years.
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Nävsjö, Dana. "From Threat to Thrill : A Comparative Study of Bram Stoker's Dracula and Stephenie Meyer's Twilight." Thesis, Linköpings universitet, Institutionen för kultur och kommunikation, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-90929.

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The purpose of this essay was to compare the classic vampire narrative, Bram Stoker's Dracula, to a more contemporary vampire narrative using the first book, Twilight, in Stephenie Meyer's Twilight series as a prime example.  By looking at the world of the vampire, the figure of the vampire and the interaction between the vampire and the main female characters in each respective story, the goal was to see how much the vampire narrative has evolved.  The argument was that the movement from Dracula to Twilight was from an archetypical, terrifying vampire to a more modern, sexually alluring and romantic vampire, where several aspects of terror have been removed.  What has been shown is that there are many aspects that have changed once terror is not the focal point. In addition, this essay also argued that in a classroom setting one could use a modern vampire narrative, such as Twilight, to activate pupils’ interest in vampires which would naturally segue into meaningful discussions, comparisons and analyses of the prototypical vampire narrative found in Dracula. As a result, this activity would also encourage students to read literature and explore new worlds
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Gottschal, Espen Joris. "Dynamic Thrust Allocation." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-26848.

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The purpose of this Thesis is to research the literature of thrust allocation, thruster modelling and maneuvering design, as well as to design and simulate various dynamic thrust allocation algorithms. Vessels with dynamic positioning (DP) systems are high in demand in multiple industries due to their good abilities to keep position. An important component of the DP system is thrust allocation; algorithms which transform desired forces in surge, sway and yaw into thruster setpoints and rotation angles.Two dynamic thrust allocation algorithms are developed, and a simulation model of a model vessel is developed and used to test the thrust allocation algorithms. Findings indicate that the more complex the algorithms are, the more oscillatory the transients become. In addition, numerical instability is a significant concern because of the sensitivity of the barrier function used. Nonetheless, dynamic thrust allocation represents a powerful way to handle saturations.
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Thrift, Brian Douglas. "Summer diets of sheep grazing spotted knapweed-infested foothill rangeland in Western Montana." Thesis, Montana State University, 2005. http://etd.lib.montana.edu/etd/2005/thrift/ThriftB0505.pdf.

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Thrift, Tanya Marie. "Effects of long-term winter-spring grazing on foothill rangeland." Thesis, Montana State University, 2006. http://etd.lib.montana.edu/etd/2006/thrift/ThriftT0506.pdf.

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Wigginton, Sarah S. "The Influence of Mechanical Stratigraphy on Thrust-Ramp Nucleation and Propagation of Thrust Faults." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7344.

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Our current understanding of thrust fault kinematics predicts that thrust faults nucleate on low angle, weak surfaces before they propagate upward and forms a higher angle ramp. While this classic kinematic and geometric model serves well in some settings, it does not fully consider the observations of footwall deformation beneath some thrust faults. We examine an alternative end-member model of thrust fault formation called “ramp-first” fault formation. This model hypothesizes that in mechanically layered rocks, thrust ramps nucleate in the structurally strong units, and that faults can propagate both upward and downward into weaker units forming folds at both fault tips. To explore this model, we integrate traditional structural geology field methods, two dimensional cross section reconstructions, and finite element modeling. Field data and retro-deformable cross sections suggest that thrust faults at the Ketobe Knob, in Utah nucleated in strong layers and propagated upward and downward creating folds in weak layers. These findings support the hypothesis that thrust faults and associated folds at the Ketobe Knob developed in accordance with the ramp-first kinematic model.We can apply this understanding of the mechanics behind thrust fault nucleation and propagation in mechanically layered stratigraphy to a wide range of geological disciplines like structural geology and tectonics, seismology, and petroleum geology. By incorporating our knowledge of lithology into fault models, geologists are more likely to correctly interpret structures with limited data sets.
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Rainey, Joseph Daniel, Andrew Brown, Ondrej Dvorak, Michael T. Dzurak, Francisco Olea, and Timur Suleymanov. "Single Door Thrust Recovery Valve." Thesis, The University of Arizona, 2011. http://hdl.handle.net/10150/144923.

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Surles, Donald Matthew. "INTERACTIONS BETWEEN STRUCTURES IN THE APPALACHIAN AND OUACHITA FORELAND BENEATH THE GULF COASTAL PLAIN." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_diss/554.

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In Alabama, the Paleozoic Appalachian thrust belt plunges southwest beneath the Mesozoic-Cenozoic Gulf Coastal Plain. In Arkansas, the Paleozoic Ouachita thrust belt plunges southeast beneath the Coastal Plain. The strikes of the exposed thrust belts suggest an intersection beneath the Coastal Plain. Well data and seismic reflection profiles confirm the strike and intersection of the thrust belts, and provide information to determine the structure and general stratigraphy of each thrust belt. In east-central Mississippi, the Appalachian thrust belt curves from the regional northeast trace to westward at the intersection with the southeastern terminus of the Ouachita thrust belt, to northwest where Ouachita thrust sheets are in the Appalachian footwall, and farther west, to a west-southwest orientation. At the intersection, the frontal Appalachian fault truncates the Appalachian thrust sheets. The Appalachian thrust sheets are detached in Lower Cambrian strata and contain a distinctive Cambrian-Ordovician passive-margin carbonate succession. The Ouachita thrust sheets are detached above the carbonate succession and contain a thick Carboniferous clastic succession. The Appalachian thrust sheets east of the intersection rest on an autochthonous footwall with a thin Lower Cambrian sedimentary cover above Precambrian crystalline basement. To the west, the Appalachian thrust sheets rest on an allochthonous footwall of thick Ouachita thrust sheets. The top of Precambrian crystalline basement rocks dips southwestward beneath the Ouachita thrust belt; large-magnitude down-to-southwest basement faults enhance the deepening. Appalachian thrust sheets on the northeast are detached above relatively shallow basement, but to the west, are detached above thick Ouachita thrust sheets, which overlie deeper basement. The structure of the basement reflects the Iapetan rifted margin, where the northwest-striking Alabama-Oklahoma transform bounds the southwest side of the Alabama promontory. The trends of basement structures and subsidence toward the Ouachita thrust belt parallel the Alabama-Oklahoma transform. Shallower basement and synrift basement grabens underlie the northeast-striking Appalachian thrust belt. The curves in strike and along-strike change in footwall structure of the Appalachian thrust belt reflect controls by basement structure and by the structure of the Ouachita thrust belt.
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McEachern, Sally J. (Sally Jane) Carleton University Dissertation Geology. "Structure and U-PB geochronology of the Pembroke thrust stack, central metasedimentary belt boundary thrust zone." Ottawa, 1990.

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Erdem, Erinc. "Thrust Vector Control By Secondary Injection." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607560/index.pdf.

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A parametric study on Secondary Injection Thrust Vector Control (SITVC) has been accomplished numerically with the help of a commercial Computational Fluid Dynamics (CFD) code called FLUENT®
. This study consists of two parts
the first part includes the simulation of three dimensional flowfield inside a test case nozzle for the selection of parameters associated with both computational grid and the CFD solver such as mesh size, turbulence model accompanied with two different wall treatment approaches, and solver type. This part revealed that simulation of internal flowfield by a segregated solver with Realizable k-&
#949
(Rke) turbulence model accompanied by enhanced wall treatment approach is accurate enough to resolve this kind of complex three dimensional fluid flow problems. In the second part a typical rocket nozzle with conical diverging section is picked for the parametric study on injection mass flow rate, injection location and injection angle. A test matrix is constructed
several numerical simulations are run to yield the assessment of performance of SITVC system. The results stated that for a nozzle with a small divergence angle, downstream injections with distances of 2.5-3.5 throat diameters from the nozzle throat lead to higher efficiencies over a certain range of total pressure ratios, i.e., mass flow rate ratios, upstream injections should be aligned more to the nozzle axis, i.e., higher injection angles, to prevent reflection of shock waves from the opposite wall and thus low efficiencies. Injection locations that are too much downstream may result reversed flows on nozzle exit.
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Books on the topic "Thrist"

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Why thrift matters: How thrifty are Americans? : the thrift quiz and thrift index. New York: Institute for American Values, 2012.

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Deux amis pour la vie. [Montrouge]: Bayard jeunesse, 2010.

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Thrift. Cincinnati, OH: WordTech Editions, 2005.

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Green, Robert S. Measured pressure distributions inside nonaxisymmetric nozzles with partially deployed thrust reversers. Hampton, Va: Langley Research Center, 1987.

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Gatlin, Gregory M. Thrust-reverser flow investigation on a twin-engine transport. Hampton, Va: Langley Research Center, 1988.

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R, McClay K., and Thrust Tectonics Conference (1990 : Royal Holloway and Bedford New College, University of London), eds. Thrust tectonics. London: Chapman & Hall, 1992.

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McClay, K. R., ed. Thrust Tectonics. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-3066-0.

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Prodigious thrust. Santa Rosa, CA: Black Sparrow Press, 1996.

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Thrift score. New York: HarperCollins, 1997.

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Larned, Emily K. Thrift store: The past & future secret lives of things. Brooklyn, N.Y: Red Charming, 2003.

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Book chapters on the topic "Thrist"

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Doroghazi, Robert M. "Thrift." In The Physician's Guide to Investing, 51–62. Totowa, NJ: Humana Press, 2009. http://dx.doi.org/10.1007/978-1-60761-134-9_8.

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Knapp, Peggy A. "Thrift." In Time-Bound Words, 158–71. London: Palgrave Macmillan UK, 2000. http://dx.doi.org/10.1057/9780230287723_11.

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Beaumont, Christopher, Philippe Fullsack, and Juliet Hamilton. "Erosional control of active compressional orogens." In Thrust Tectonics, 1–18. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-3066-0_1.

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Mosar, Jon, and John Suppe. "Role of shear in fault-propagation folding." In Thrust Tectonics, 123–32. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-3066-0_10.

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Zoetemeijer, Reini, and William Sassi. "2-D reconstruction of thrust evolution using the fault-bend fold method." In Thrust Tectonics, 133–40. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-3066-0_11.

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Apotria, Theodore G., William T. Snedden, John H. Spang, and David V. Wiltschko. "Kinematic models of deformation at an oblique ramp." In Thrust Tectonics, 141–54. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-3066-0_12.

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Jamison, William R. "Stress controls on fold thrust style." In Thrust Tectonics, 155–64. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-3066-0_13.

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Rowan, Mark G., and Roy Kligfield. "Kinematics of large-scale asymmetric buckle folds in overthrust shear: an example from the Helvetic nappes." In Thrust Tectonics, 165–73. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-3066-0_14.

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Alonso, Juan Luis, and Antonio Teixell. "Forelimb deformation in some natural examples of fault-propagation folds." In Thrust Tectonics, 175–80. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-3066-0_15.

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Fischer, M. P., and N. B. Woodward. "The geometric evolution of foreland thrust systems." In Thrust Tectonics, 181–89. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-3066-0_16.

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Conference papers on the topic "Thrist"

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Williams, Reginald, and Baily Vittal. "Fluidic Thrust Vectoring and Throat Control Exhaust Nozzle." In 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-4060.

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Chen, Ye, Zhongxi Hou, Yudan Yang, Guo Zheng, Jian'an Zong, and Yuan Long. "Calculation method for fluidic thrust-vectoring dual throat nozzle." In International Conference on Mechanical Design and Simulation (MDS 2022), edited by Dongyan Shi and Guanglei Wu. SPIE, 2022. http://dx.doi.org/10.1117/12.2638576.

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Miller, Daniel, Patrick Yagle, and Jeffrey Hamstra. "Fluidic throat skewing for thrust vectoring in fixed-geometry nozzles." In 37th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1999. http://dx.doi.org/10.2514/6.1999-365.

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Flamm, Jeffrey, Karen Deere, Bobby Berrier, Stuart Johnson, and Mary Mason. "Experimental Study of a Dual-Throat Fluidic Thrust-Vectoring Nozzle Concept." In 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.2005-3503.

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Sloan, B., S. Spence, J. Wang, and S. Raghunathan. "Parametric Analysis of Variable Nacelle Nozzle Throat Area Using Warped Chevrons." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-51265.

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Simulations of the NASA Rotor 67, Stator 67A stage integrated into a bespoke nacelle were performed using ANSYS CFX. The throat area of the nacelle nozzle was varied by use of warped chevrons. 8, 12 and 16 chevron nozzles were simulated to evaluate the impact of the variation in geometry upon the nacelle wake and local forces. The force produced from the nozzle and fan, is compared to the baseline case where the throat area is optimised for cruise conditions. The variation in gross thrust between cases is also analysed. The turbulence kinetic energy and total temperature variation through the wake is compared. A reduction in peak wake mixing massflow-averaged turbulent kinetic energy of 11.9% was attained. Surface force measurements of the rotor, stator and nozzle duct indicate a rising thrust loss with increasing nozzle throat area. However, measurement of the nozzle exit velocities and massflow rates enable subsequent estimation of the gross thrust which indicate a rise of 2.4% relative to the baseline is achievable.
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Yang, Yuming, Li Zhou, and Jingwei Shi. "The Influence of Aerodynamic/Geometric Parameters on the Performance of the TBCC Ejector Nozzle." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14568.

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Abstract TBCC ejector nozzle is the key component of the propulsion system of hypersonic vehicle to increase the thrust characteristic of the whole envelope. Aiming at the exhaust system of TBCC engine with the first stage of Ma 0 ∼ 3, the complex internal and external flow interference characteristics of TBCC ejector nozzle are analyzed and the influence of key aerodynamic and geometric parameters are studied. 1) The secondary throat produces a strong oblique shock wave in the primary flow, that reflects with the oblique shock wave at the exit of the nozzle and forms the complex flow field characteristics of the ejector nozzle. 2) The introduction of the secondary flow will not change the flow field structure of the nozzle, but can significantly reduce the intensity of shock system in the sleeve and improve the thrust performance of the nozzle; the aerodynamic throat of the primary flow appears separation because of the high pressure secondary flow, which resulting in the flow mismatching and choking of the primary nozzle. 3) Under the severe over expansion state, the thrust performance is higher when the expansion angle is reduced; The increase of the secondary throat diameter ratio can improve the over expansion state of the primary flow and increase the thrust performance; the increase of the spacing ratio causes the increase of the secondary mass rate and the decrease of the primary mass rate, but the thrust performance is less affected.
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Maruyama, Yuichi, Masashi Sakata, and Yoichiro Takahashi. "Performance Analyses of Fluidic Thrust Vector Control System Using Dual Throat Nozzle." In AIAA Propulsion and Energy 2019 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2019. http://dx.doi.org/10.2514/6.2019-4344.

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8

Yagle, Patrick J., Daniel N. Miller, K. Brant Ginn, and Jeffrey W. Hamstra. "Demonstration of Fluidic Throat Skewing for Thrust Vectoring in Structurally Fixed Nozzles." In ASME Turbo Expo 2000: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/2000-gt-0013.

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The experimental demonstration of a fluidic, multi-axis thrust vectoring (MATV) scheme is presented for a structurally fixed, afterburning nozzle referred to as the conformal fluidic nozzle (CFN). This concept for jet flow control features symmetric injection around the nozzle throat to provide throttling for jet area control, and asymmetric injection to subsonically skew the sonic plane for jet vectoring. The conceptual development of the CFN was presented in a companion paper (Miller et al., 1999). In that study, critical design variables were shown to be the flap length and expansion area ratio of the nozzle, and the location, angle, and distribution of injected flow. Measures of merit were vectoring capability, gross thrust coefficient, and discharge coefficient. A demonstration of MATV was conducted on a 20%-scale CFN test article across a range of nozzle pressure ratios (NPR), injector flow rates, and flow distributions. Both yaw and pitch vector angles of greater than 8° were obtained at NPR of 5.5. Yaw vector angles greater than 10° were achieved at lower NPR. Values of thrust-coefficient for the CFN generally exceeded published measurements of shock-based, vectoring methods. In terms of vectoring effectiveness (ratio of vector angle to percent injected flow), fluidic throat skewing was found to be comparable to shock-based vectoring methods.
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VOLKMANN, JON, JAMES MCLEOD, and SCOTT CLAFLIN. "Investigation of throat film coolant for advanced LOX/RP-1 thrust chambers." In 27th Joint Propulsion Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1991. http://dx.doi.org/10.2514/6.1991-1979.

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Deere, Karen, Bobby Berrier, Jeffrey Flamm, and Stuart Johnson. "A Computational Study of a Dual Throat Fluidic Thrust Vectoring Nozzle Concept." In 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.2005-3502.

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Reports on the topic "Thrist"

1

Keaton, P. W. Low-thrust rocket trajectories. Office of Scientific and Technical Information (OSTI), January 1986. http://dx.doi.org/10.2172/5985829.

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2

Keaton, P. W. Low-thrust rocket trajectories. Office of Scientific and Technical Information (OSTI), March 1987. http://dx.doi.org/10.2172/6237070.

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Huo, Zhen, and José-Víctor Ríos-Rull. Paradox of Thrift Recessions. Cambridge, MA: National Bureau of Economic Research, September 2013. http://dx.doi.org/10.3386/w19443.

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4

Gerasimoff, M. D. Postmetamorphic thrust faulting on the. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/120178.

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MacLean, B. C. Bovie structure: A decapitated thrust? Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2002. http://dx.doi.org/10.4095/213391.

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Chiang, N., S. Peles, C. Petra, S. Regev, K. Swirydowicz, and J. Wang. ExaSGD: 2021 Kernel Thrust Activities. Office of Scientific and Technical Information (OSTI), October 2021. http://dx.doi.org/10.2172/1828670.

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Chiang, N., C. Petra, J. Wang, and I. Aravena Solis. ExaSGD: 2022 Kernel Thrust Activities. Office of Scientific and Technical Information (OSTI), November 2022. http://dx.doi.org/10.2172/1897345.

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Leitner, Amiram. Thrust Vector Control, Heat Transfer Modeling. Fort Belvoir, VA: Defense Technical Information Center, July 1986. http://dx.doi.org/10.21236/ada522372.

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Black, Scott D. Thrust Breakdown Characteristics of Conventional Propellers. Fort Belvoir, VA: Defense Technical Information Center, September 2007. http://dx.doi.org/10.21236/ada472935.

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10

Collins Jr, Emmanuel G. Feedback Control Design for Counterflow Thrust Vectoring. Fort Belvoir, VA: Defense Technical Information Center, September 2005. http://dx.doi.org/10.21236/ada438337.

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