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Academic literature on the topic 'Cascade dynamics'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Cascade dynamics"

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Klose, Ann Kristin, Nico Wunderling, Ricarda Winkelmann, and Jonathan F. Donges. "What do we mean, ‘tipping cascade’?" Environmental Research Letters 16, no. 12 (December 1, 2021): 125011. http://dx.doi.org/10.1088/1748-9326/ac3955.

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Abstract Based on suggested interactions of potential tipping elements in the Earth’s climate and in ecological systems, tipping cascades as possible dynamics are increasingly discussed and studied. The activation of such tipping cascades would impose a considerable risk for human societies and biosphere integrity. However, there are ambiguities in the description of tipping cascades within the literature so far. Here we illustrate how different patterns of multiple tipping dynamics emerge from a very simple coupling of two previously studied idealized tipping elements. In particular, we distinguish between a two phase cascade, a domino cascade and a joint cascade. A mitigation of an unfolding two phase cascade may be possible and common early warning indicators are sensitive to upcoming critical transitions to a certain degree. In contrast, a domino cascade may hardly be stopped once initiated and critical slowing down-based indicators fail to indicate tipping of the following element. These different potentials for intervention and anticipation across the distinct patterns of multiple tipping dynamics should be seen as a call to be more precise in future analyses of cascading dynamics arising from tipping element interactions in the Earth system.
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Takahashi, Akiyuki, Kotoko Hirose, Naoki Soneda, and Masanori Kikuchi. "Molecular Dynamics Simulation of Displacement Cascade in α-Zr." Key Engineering Materials 306-308 (March 2006): 923–28. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.923.

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In this work, the point defect production in α-Zr at 600K by displacement cascade with Primary Knock-on Atom (PKA) energy up to 20KeV has been investigated by molecular dynamics (MD) simulations. Especially, the influence of subcascades formation on the point defect and cluster production in 20keV cascades has been investigated in detail. The subcascade formation was seen in 36 cases of 20keV cascade simulations out of 50 cases. As the damaged areas are divided into many small areas, the maximum size of point defect cluster tends to decrease when the displacement cascade is settled. On the other hand, subcascades formation has not had an influence on the number of Frenkel pairs in final state of the 20keV cascades comparatively.
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Lee, Y. T., T. W. Bein, J. Feng, and C. L. Merkle. "Unsteady Rotor Dynamics in Cascade." Journal of Turbomachinery 115, no. 1 (January 1, 1993): 85–93. http://dx.doi.org/10.1115/1.2929221.

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A time-accurate potential-flow calculation method has been developed for unsteady incompressible flows through two-dimensional multi-blade-row linear cascades. The method represents the boundary surfaces by distributing piecewise linear-vortex and constant-source singularities on discrete panels. A local coordinate is assigned to each independently moving object. Blade-shed vorticity is traced at each time step. The unsteady Kutta condition applied is nonlinear and requires zero blade trailing-edge loading at each time. Its influence on the solutions depends on the blade trailing-edge shapes. Steady biplane and cascade solutions are presented and compared to exact solutions and experimental data. Unsteady solutions are validated with the Wagner function for an airfoil moving impulsively from rest and the Theodorsen function for an oscillating airfoil. The shed vortex motion and its interaction with blades are calculated and compared to an analytic solution. For a multi-blade-row cascade, the potential effect between blade rows is predicted using steady and quasi-unsteady calculations. The accuracy of the predictions is demonstrated using experimental results for a one-stage turbine stator-rotor.
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GAO, Jinhua, Yue LIU, and Xueqi CHENG. "Decentralized cascade dynamics modeling." SCIENTIA SINICA Informationis 48, no. 11 (November 1, 2018): 1575–88. http://dx.doi.org/10.1360/n112018-00081.

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Schertzer, D., S. Lovejoy, F. Schmitt, Y. Chigirinskaya, and D. Marsan. "Multifractal Cascade Dynamics and Turbulent Intermittency." Fractals 05, no. 03 (September 1997): 427–71. http://dx.doi.org/10.1142/s0218348x97000371.

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Turbulent intermittency plays a fundamental role in fields ranging from combustion physics and chemical engineering to meteorology. There is a rather general agreement that multifractals are being very successful at quantifying this intermittency. However, we argue that cascade processes are the appropriate and necessary physical models to achieve dynamical modeling of turbulent intermittency. We first review some recent developments and point out new directions which overcome either completely or partially the limitations of current cascade models which are static, discrete in scale, acausal, purely phenomenological and lacking in universal features. We review the debate about universality classes for multifractal processes. Using both turbulent velocity and temperature data, we show that the latter are very well fitted by the (strong) universality, and that the recent (weak, log-Poisson) alternative is untenable for both strong and weak events. Using a continuous, space-time anisotropic framework, we then show how to produce a causal stochastic model of intermittent fields and use it to study the predictability of these fields. Finally, by returning to the origins of the turbulent "shell models" and restoring a large number of degrees of freedom (the Scaling Gyroscope Cascade, SGC models) we partially close the gap between the cascades and the dynamical Navier–Stokes equations. Furthermore, we point out that beyond a close agreement between universal parameters of the different modeling approaches and the empirical estimates in turbulence, there is a rather common structure involving both a "renormalized viscosity" and a "renormalized forcing". We conclude that this gives credence to the possibility of deriving analytical/renormalized models of intermittency built on this structure.
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Farge, Marie, and Robert Sadourny. "Wave-vortex dynamics in rotating shallow water." Journal of Fluid Mechanics 206 (September 1989): 433–62. http://dx.doi.org/10.1017/s0022112089002351.

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We investigate how two-dimensional turbulence is modified when the incompressibility constraint is removed, by numerically integrating the full Saint-Venant (shallow-water) equations. In the case of small geopotential fluctuations considered here, we find no energy exchange between the inertio-gravitational and the potentio-vortical components of the flow. At small scales, the potentio-vortical component behaves as if the flow were incompressible, while we observe an intense direct energy cascade within the inertio-gravitational component. At large scales, the reverse potentio-vortical energy cascade is reduced when the level of inertio-gravitational energy is high. Looking at the effect of rotation, we find that a fast rotation rate tends to inhibit all three cascades. In particular, the inhibition of the inertio-gravitational energy cascade towards small scales implies that the geostrophic adjustment process is hindered by an increase of rotation. Concerning the structure of the coherent vortices emerging out of these decaying turbulent flows, we observe that the smallest scales are concentrated inside the vortex cores and not on their periphery.
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Poletaev, Gennady, Darya Novoselova, Mikhail D. Starostenkov, Vladimir Tsellermaer, and Viktor Kovalenko. "The Study of Inhibition of Atom-Atom Collisions Cascades by Ni-Al (100) Interphase Boundary." Key Engineering Materials 685 (February 2016): 8–12. http://dx.doi.org/10.4028/www.scientific.net/kem.685.8.

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The interaction of atom-atom collisions cascades with Ni-Al interphase boundary was studied by the method of molecular dynamics. It was shown that the interphase boundary partially absorbs the cascade energy. The degree of energy absorption of the cascade by the interphase boundary increases with the growth of the structural imperfection of the boundary and density of the misfit dislocations, and also with increase of distance between the boundary and the place of the cascade initiation.
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Centola, Damon, Víctor M. Eguíluz, and Michael W. Macy. "Cascade dynamics of complex propagation." Physica A: Statistical Mechanics and its Applications 374, no. 1 (January 2007): 449–56. http://dx.doi.org/10.1016/j.physa.2006.06.018.

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Ikeda, Y., T. Hasegawa, and K. Nemoto. "Cascade dynamics on clustered network." Journal of Physics: Conference Series 221 (April 1, 2010): 012005. http://dx.doi.org/10.1088/1742-6596/221/1/012005.

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de la Rubia, T. Diaz, R. S. Averback, Horngming Hsieh, and R. Benedek. "Molecular dynamics simulation of displacement cascades in Cu and Ni: Thermal spike behavior." Journal of Materials Research 4, no. 3 (June 1989): 579–86. http://dx.doi.org/10.1557/jmr.1989.0579.

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Molecular dynamics simulations of energetic displacement cascades in Cu and Ni were performed with primary-knock-on-atom (PKA) energies up to 5 keV. The interatomic forces were represented by the Gibson II (Cu) and the Johnson-Erginsoy (Ni) potentials. Our results indicate that the primary state of damage produced by displacement cascades is controlled basically by two phenomena: replacement collision sequences during the ballistic phase, and melting and resolidification during the thermal spike. The thermal-spike phase is of longer duration and has a more marked effect in Cu than in Ni. Results for atomic mixing, defect production, and defect clustering are presented and compared with experiment. Simulations of “heat spikes” in these metals suggest a model for “cascade collapse” based on the regrowth kinetics of the molten cascade core.
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Dissertations / Theses on the topic "Cascade dynamics"

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Nackley, Brittany B. "Temporal Dynamics of the Defense Cascade." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/99987.

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Understanding physiological responses to threat can inform therapeutic interventions for phobias, anxieties, and PTSD. The defense cascade is reviewed as a theoretical model that predicts behavioral and physiological responses to threats. Nineteen undergraduates (five male), average age 19.4 experienced a novel virtual reality (VR) threat scenario while their physiology was measured. The Subjective Units of Distress Scale (SUDS) was used as a self-report indicator of distress in the research setting. Averaged SUDS reports suggested that the VR stimulus was experienced as threatening for most participants, but their autonomic response patterns did not fit those predicted by the defense cascade. Participants who had scored high on adaptive response questionnaires tended to show uncoupled ANS activation during baseline, but varied across the stimulus condition. Nearly all participants showed either coactivation or reciprocal activation during the stimulus period except those reporting the most dissociative trauma experiences, who mostly showed uncoupled ANS activation.
M.S.
The more we understand about how people’s bodies and their energies act when they feel threatened, the better we can find help for folks who struggle with anxiety, trauma or other challenging conditions. This research uses a theoretical model called the defense cascade to explore how people respond mentally and physically to threatening situations. Nineteen undergraduates went through a virtual reality (VR) experience that was designed to feel threatening while their body and its energy systems were measured. A scale was introduced called the Subjective Units of Distress Scale (SUDS) and was used to help the researchers understand how distressed people felt while they were in the VR experience. Averaged SUDS reports suggested that the VR stimulus was experienced as threatening for most participants, but their body response patterns did not fit those predicted by the defense cascade. Participants whose questionnaire responses suggested they were not anxiety-prone or traumatized, tended to show bodily activation that uncoupled their two autonomic bodily systems during a baseline period before the threatening stimulus. However, their autonomic responses during the stimulus period varied. Nearly all participants showed either both autonomic systems acting together or only one system acting in a mutually exclusive way to the other system during the stimulus period. This was the case for most participants except those reporting the most trauma involving dissociative experiences. This latter group mostly showed uncoupled autonomic bodily patterns.
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Monaco, Jeffrey Francis. "Supersonic flows of Bethe-Zel'dovich-Thompson fluids in cascade configurations." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06112009-063024/.

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Zambonini, Gherardo. "Unsteady dynamics of corner separation in a linear compressor cascade." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEC049/document.

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Le présent travail concerne l'étude du décollement de coin de compresseurs par des investigations expérimentaux sur le banc d'essai subsonique grille d'aubes situé au LMFA (Re = 3.8 x 105, M = 0,12, profil NACA 65-009). Habituellement, cette particulière séparation tridimensionnelle a lieu dans le coin entre l'aubage et la paroi du moyeu des rangées d'aubes, également dans les stators et les rotors.Les performances de l’étage sont ainsi dégradées à cause des pertes de charge et du blocage conséquent à la séparation de l’écoulement. Bien que les caractéristiques stationnaires sont bien connues par la littérature, uniquement des récentes études expérimentales avancées combinées aux améliorations de simulations numériques, telles que URANS et LES, ont permis de découvrir le comportement très instable du décollement de coin. Des études préalables sur le même banc d'essai ont rapporté un comportement intermittent du décollement, appelé comportement bimodal. Dans la présente thèse de doctorat, il est montré que le comportement bimodal correspond à deux états spécifiques du champ fluide: une séparation fermée, presque supprimée, et une séparation ouverte caractérisée par un blocage massif. Il est clair que cette commutation bimodale du décollement de coin apparaissant dans une machine réelle pourrait avoir un impact fortement déstabilisant. En utilisant la méthode de mesure PIV haute vitesse couplée à des mesures de pression résolues en temps sur la surface de l'aubage, l'écoulement d'un canal inter-aube a été étudié pour deux différentes incidences. Les mesures PIV fournissent pour la première fois des visualisations résolues en temps et étendues à toute la section de l'aubage de la variation bimodale du décollement. L'interaction des grandes structures aléatoires de la couche limite à l'amont avec le bord d'attaque de l'aubage déstabilise le front du décollement et agrandit la région de recirculation. Une séparation ainsi massive persiste jusqu'à ce que le blocage dans le canal inter-aube provoque la rupture des plus grandes structures constituant la zone de recirculation. Successivement le débit recommence à accélérer et la séparation est presque supprimée. Cette dynamique coïncide avec le régime d'écoulement hautement instationnaire et apériodique des diffuseurs, appelé large transitory stall, caractérisé par des grandes amplitudes d'énergie dans la gamme des basses fréquences du spectre. Des moyennes conditionnelles de pression et la décomposition orthogonale modale (POD) des champs de vitesse ont été appliquées pour montrer l'effet rétroactif du blocage induit par la séparation ouverte sur l'angle local au bord d'attaque. Ces résultats supportent l’hypothèse d'une instabilité auto-entretenue causée par la diffusion imposée dans le stator. En fin, des mesures de pression totale résolues en temps ont été effectuées en utilisant des capteurs à haute réponse en fréquence, situés à la même position dans les différents canaux adjacents. La cohérence et la linéarité de l'angle de phase trouvée entre les capteurs confirment que l'instabilité du décollement peut se propager d'un canal a l'autre, en analogie avec les perturbations tournantes (rotating instabilities) apparaissant dans les bancs d'essai annulaires. Ceci montre pour la première fois que, même dans une grille d'aubes linéaire de compresseur, l'instabilité intrinsèque du décollement de coin peut déclencher la propagation d'instabilités
The present work focuses on the study of the corner separation phenomenon in compressors carried out by experimental investigations on a subsonic linear cascade test rig (Re=3.8x105, M=0.12, blade profile NACA 65-009). Usually, this particular three-dimensional separation takes place in the corner between the blade and the endwall of compressor rows, mostly at hub, both in stators and rotors.Its main features are high total pressure losses and blockage of the flow, with consequent impacts on the efficiency. Whereas time averaged characteristics are well known from the past, only recent advanced experimental studies and improvements of numerical simulations, such as URANS and LES, have permitted to uncover the highly unsteady behavior of corner separation in compressors. Precedent studies on the same test rig have reported an intermittent unsteady behavior of corner separation, called bimodal behavior. In the present thesis it is shown that the bimodal behavior corresponds to two specific states of the flow: a closed separation, almost suppressed, and an open separation characterized by massive blockage and losses. Clearly hub-separation bimodal switches appearing in a real machine could have a first order detrimental effect on the stability of the flow in the compressor. By using high speed PIV coupled with unsteady pressure measurements on the surface of the blade the flow in a single blade passage has been investigated for different incidences. The PIV measurements provide, for the first time, time-resolved flow visualizations of the size switch of the separation with an extended field of view covering the entire blade section. The interaction of random large structures of the incoming boundary layer with the blade is found to be a predominant element that destabilizes the separation boundary and enlarges the recirculation region. Such a massive separation persists until the blockage in the passage causes the breakdown of the largest structures in the aft part of the blade, reestablishing the closed separation state. Such dynamics coincide with the aperiodic intermittent flow regime of diffusers, called transitory stall regime, and the associated Fourier spectra show the largest energy amplitudes in the low frequency range. Conditional ensemble averages of pressure and proper orthogonal decomposition (POD) of velocity fields have been applied to show the feedback effect of the blockage of the separation on the flow angle around the blade leading edge. These results draw the picture of a self-sustained instability caused by the diffusion imposed by the inter-blade passage. To answer the question about the interaction between adjacent corner separations, time-resolved total pressure measurements have been carried out by using high frequency response sensors positioned in bimodal points of multiple passages. The coherent propagation velocity and the linearity of the phase angle found between the signals confirm that the unsteadiness of the separation can propagate in pitch-wise direction. It is interesting to underline that equivalent elements characterize rotating disturbances appearing in annular test rigs. This finally shows that, even in an isolated stator blade row, the intrinsic unsteadiness of corner separation can start the propagation of instabilities. It is the first time that such a propagation effect is observed in a linear compressor cascade
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Kiss, Tibor. "Experimental and numerical investigation of transonic turbine cascade flow." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-02022007-133636/.

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Zaccaria, Michael A. "Development of a transonic turbine cascade facility." Thesis, Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/53201.

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This thesis describes the design and initial testing of a transonic turbine cascade facility. It is specifically concerned with the best way to obtain flow periodicity and repeatability through the cascade by the use of tailboards at the cascade exit. The problem of how to achieve flow periodicity and repeatability has not been completely resolved. An examination of the literature available on transonic turbine cascade testing indicates some researchers use no tailboards, some use a solid tailboard, and still others use a porous tailboard. In this thesis, the flow through the turbine cascade is tested for three different cascade exit configurations; no tailboard, a solid tailboard, and a porous tailboard. The cascade is also tested with the tailboard at different angles, to see what effect the angle of the tailboard has on the flow through the cascade. The data acquisition and flow visualization systems are discussed and some preliminary results are given.
Master of Science
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Rodger, Philippe (Philippe William) Carleton University Dissertation Engineering Aerospace. "Establishing two-dimensional flow in the large-scale planar turbine cascade." Ottawa, 1992.

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Carneal, James P. "Experimental investigation of reversed flow in a compressor cascade." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42096.

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Moore, H. "Experiments in a turbine cascade for the validation of turbulence and transition models." Thesis, Durham University, 1995. http://etheses.dur.ac.uk/5356/.

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This thesis presents a detailed investigation of the secondary flow and boundary layers in a large scale, linear cascade of high pressure turbine rotor blades. The puropose of the data is to provide a suitable test case to aid the design and validation of the turbulence and transition models used in computational fluid dynamics. Hot-wire measurements have been made on a number of axial planes upstream, within and downstream of the blades to give both the mean flow conditions and all six components of Reynolds stress. Suitable inlet conditions have been defined at one axial chord upstream of the blade leading edge where the velocity and turbulence have been measured in both the freestream and endwall boundary layer. The turbulence dissipation rate has also been measured in order to define fully the inlet flow, a quantity that is usually missing in other data. Measurements through the blade show that the turbulence generation associated with the secondary flows is considerable and that all three shear stress components are significant. Intermittency measurements close to the endwall and blade surfaces show that the boundary layers are mostly laminar or transitional. The new endwall boundary layer, that forms behind the separation line, was found to be initially laminar. On the suction surface transition occurs over the latter part of the blade and on the pressure surface the accelerating flow causes relaminarisation. A number of calculations using a mixing length and high and low Reynolds number k-ϵ calculations show that reasonable overall results may be obtained. The lack, or failure, of transition modelling caused profile losses to be generally overpredicted and there was little evidence that the more sophisticated models produced better results. No model accurately predicted the individual turbulence quantities largely due to the inadequacy of the Boussinesq assumption for this type of flow. Good transition modelling appears to be more important than turbulence modelling in terms of the overall results.
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Menzel, Stefan. "Intraband Electron Dynamics in new materials and designs for quantum cascade lasers." Thesis, University of Sheffield, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500220.

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Friart, Gaetan. "Semiconductor laser dynamics: two polarization feedback, quantum cascade lasers, and ring lasers." Doctoral thesis, Universite Libre de Bruxelles, 2017. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/248835.

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Semiconductor lasers (Sls) are very sensitive to external perturbations which may destabilize their steady output. This is particularly striking when the SL is subject to optical feedback, i.e. when part of the light coming out of the laser is reinjected in the cavity after reflection from a distant mirror. For some applications, this is a nuisance that we wish to avoid. But optical feedback may also drive the laser into dynamical regimes which are useful for new applications. In this thesis, we study different problems where an SL is subject to a delayed feedback or to an injected signal. These problems are motivated by recent experiments, technological issues, or particular dynamical phenomena. Specifically, we combine analytical techniques, numerical simulations, and experiments to investigate the bifurcation mechanisms leading to a large variety of oscillatory outputs. The systems that we discuss are an edge-emitting laser with polarization-rotated optical feedback, a two-mode laser with optical injection, a quantum cascade laser with optical feedback, and a semiconductor ring laser with optical feedback. We show that the bifurcations from the steady-states are of primary importance. They not only delimit the stability boundaries of the laser output but they also form the backbone structure of many pulsating waveforms. We investigate these bifurcations in detail in order to find the best operating conditions to observe specific dynamical regimes. Our results highlight laser key parameters that allow their efficient control.
Les lasers à semi-conducteur sont sensibles aux perturbations externes et celles-ci peuvent déstabiliser leur faisceau de sortie d’intensité constante. Ceci est particulièrement marquant quand le laser à semi-conducteur est sujet à un feedback optique, c’est-à-dire quand une partie de la lumière sortant du laser est réinjectée dans sa cavité après réflexion par un miroir distant. Pour certaines applications, cela représente une nuisance que l’on souhaite éviter. Mais le feedback optique peut aussi engendrer des régimes dynamiques utiles pour de nouvelles applications. Dans cette thèse, nous étudions différents problèmes où un laser à semi-conducteur est soumis à un feedback retardé ou à un signal injecté. Nos travaux sont motivés par de récentes expériences, des questions technologiques ou des phénomènes dynamiques particuliers. Nous combinons des techniques analytiques, des simulations numériques ainsi que des expériences afin d’analyser les mécanismes de bifurcation menant à une large variété de régimes oscillants.Nous étudions en premier lieu la dynamique d’un laser à semi-conducteur soumis à un feedback avec rotation de la polarisation. Nous examinons, à la fois théoriquement et expérimentalement, la séquence de bifurcations menant à des oscillations sous forme d’ondes carrées. Nous mettons en évidence une multistabilité entre différentes ondes carrées de périodes spécifiques. Nous introduisons alors un mécanisme de contrôle qui nous permet de sélectionner l’onde carrée désirée. Nous analysons ensuite les frontières de stabilité d’un laser à semi-conducteur à deux polarisations soumis à une injection optique. Nous montrons que si les gains des deux modes de polarisation sont suffisamment proches, un état stationnaire mixte stable peut exister. Nous explorons également les conditions permettant une bistabilité entre un état stationnaire pur et un état stationnaire mixte. Les lasers à cascade quantique sont de nouveaux lasers à semi-conducteur prometteurs qui possèdent une forte tolérance au feedback optique. Nous examinons de façon systématique leur stabilité dans la limite des grands retards. Nous montrons que des instabilités oscillantes sont cependant possibles pour de faibles valeurs du courant de pompe. Le dernier dispositif que nous étudions dans cette thèse est le laser à semi-conducteur en anneau soumis à un feedback optique. Nous identifions le mécanisme de bifurcation, appelé pont de bifurcation, responsable des instabilités oscillantes dans le faisceau de sortie du laser. Ces oscillations sont indésirables pour la plupart des applications impliquant de tels lasers. Nous montrons qu’elles peuvent être évitées en contrôlant la phase du feedback.
Doctorat en Sciences
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Books on the topic "Cascade dynamics"

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Barsky, E. Cascade classification of powders. Cambridge: Cambridge International Science Pub., 2006.

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Krainer, Andreas. Viscous-inviscid interaction analysis of incompressible cascade flows. Monterey, Calif: Naval Postgraduate School, 1986.

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Curlett, Brian P. The aerodynamic effect of fillet radius in a low speed compressor cascade. [Washington, DC]: National Aeronautics and Space Administration, 1991.

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Grove, Darren V. Experimental and numerical investigation of second-generation, controlled-diffusion, compressor blades in cascade. Monterey, Calif: Naval Postgraduate School, 1997.

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Brown, Martin John. Natural tree regeneration and coarse woody debris dynamics after a forest fire in the western Cascade Range. Portland, OR: United States Department of Agriculture, Forest Service, Pacific Northwest Research Station, 2013.

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Elazar, Yekutiel. A mapping of the viscous flow behavior in a controlled diffusion compressor cascade using laser doppler velocimetry and preliminary evaluation of codes for the prediction of stall. Monterey, California: Naval Postgraduate School, 1988.

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Hessburg, Paul F. Using estimates of natural variation to detect ecologically important change in forest spatial patterns: A case study, Cascade Range, Eastern Washington. [Portland, OR] (333 S.W. First Avenue, P.O. Box 3890, Portland, 97208-3890): U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1999.

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Hessburg, Paul F. Using estimates of natural variation to detect ecologically important change in forest spatial patterns: A case study, Cascade Range, eastern Washington. Portland, Or. (333 S.W. First Ave., P.O. Box 3890, Portland 97208-3890): U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1999.

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Elsner, Janusz W. Aerodynamika palisad łopatkowych. Wrocław: Zakład Narodowy im. Ossolińskich, 1988.

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Verhoff, August. Far field computational boundary conditions for internal flow problems. Monterey, Calif: Naval Postgraduate School, 1988.

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Book chapters on the topic "Cascade dynamics"

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Wacker, Andreas. "Quantum Cascade Laser: An Emerging Technology." In Nonlinear Laser Dynamics, 91–109. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527639823.ch4.

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Cugnon, J. "Collective flow and intranuclear cascade dynamics." In Quark Matter '84, 101–5. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/3-540-15183-4_28.

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Depraz, Natalie. "Chapter 2. Shock, twofold dynamics, cascade." In Surprise at the Intersection of Phenomenology and Linguistics, 24–42. Amsterdam: John Benjamins Publishing Company, 2019. http://dx.doi.org/10.1075/ceb.11.02dep.

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Race, Christopher. "A Radiation Damage Cascade." In The Modelling of Radiation Damage in Metals Using Ehrenfest Dynamics, 9–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-15439-3_2.

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Brandenburg, Axel. "The Inverse Cascade in Turbulent Dynamos." In Dynamo and Dynamics, a Mathematical Challenge, 125–32. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0788-7_15.

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Parker, Geoff A. "The Sexual Cascade: Evolutionary Dynamics of Sperm Competition." In XIIIth International Symposium on Spermatology, 77–78. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66292-9_13.

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Shin, Byeong Rog, Yuka Iga, and Toshiaki Ikohagi. "Numerical Analysis of Cavitating Flow through a 2-D Decelerating Cascade." In Computational Fluid Dynamics 2000, 651–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-56535-9_99.

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Takahashi, Akiyuki, Kotoko Hirose, Naoki Soneda, and Masanori Kikuchi. "Molecular Dynamics Simulation of Displacement Cascade in α-Zr." In Fracture and Strength of Solids VI, 923–28. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-989-x.923.

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Scamarcio, G., V. Spagnolo, M. S. Vitiello, and C. Di Franco. "Experimental Investigation of Hot Carriers in THz and Mid-IR Quantum Cascade Lasers." In Nonequilibrium Carrier Dynamics in Semiconductors, 89–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/978-3-540-36588-4_20.

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Echarroudi, Younes, and Lahcen Maniar. "Null Controllability of a Degenerate Cascade Model in Population Dynamics." In STEAM-H: Science, Technology, Engineering, Agriculture, Mathematics & Health, 211–68. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77704-3_10.

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Conference papers on the topic "Cascade dynamics"

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Vilaseca, Ramon A., G. J. de Valcarcel, Victor Espinosa, and Eugenio Roldan. "Cascade laser dynamics." In SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, edited by Rajarshi Roy. SPIE, 1993. http://dx.doi.org/10.1117/12.164765.

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Lee, Yu-Tai, Thomas W. Bein, Jin Zhang Feng, and Charles L. Merkle. "Unsteady Rotor Dynamics in Cascade." In ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/91-gt-147.

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A time-accurate potential-flow calculation method has been developed for unsteady incompressible flows through two-dimensional multi-blade-row linear cascades. The method represents the boundary surfaces by distributing piecewise linear-vortex and constant-source singularities on discrete panels. A local coordinate is assigned to each independently moving object. Blade-shed vorticity is traced at each time step. The unsteady Kutta condition applied is nonlinear and requires zero blade trailing-edge loading at each time. Its influence on the solutions depends on the blade trailing-edge shapes. Steady biplane and cascade solutions are presented and compared to exact solutions and experimental data. Unsteady solutions are validated with the Wagner function for an airfoil moving impulsively from rest and the Theodorsen function for an oscillating airfoil. The shed vortex motion and its interaction with blades are calculated and compared to an analytic solution. For multi-blade-row cascade, the potential effect between blade rows is predicted using steady and quasi unsteady calculations. The accuracy of the predictions is demonstrated using experimental results for a one-stage turbine stator-rotor.
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Schwarz, Benedikt, Maximilian Beiser, Florian Pilat, Sandro Dal Cin, Johannes Hillbrand, Robert Weih, Johannes Koeth, and Sven Höfling. "Interband cascade laser frequency combs." In Semiconductor Lasers and Laser Dynamics X, edited by Krassimir Panajotov, Marc Sciamanna, and Sven Höfling. SPIE, 2022. http://dx.doi.org/10.1117/12.2624340.

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Centola, D. M. "Cascade dynamics of multiplex propagation." In MODELING COOPERATIVE BEHAVIOR IN THE SOCIAL SCIENCES. AIP, 2005. http://dx.doi.org/10.1063/1.2008620.

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Safiullina, L. Kh, A. Sh Gabdullin, and I. V. Anikin. "Face Recognition in Biometric Systems Using Haar Cascade Classification." In 2021 Dynamics of Systems, Mechanisms and Machines (Dynamics). IEEE, 2021. http://dx.doi.org/10.1109/dynamics52735.2021.9653460.

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Woodley, B., N. Peake, B. Woodley, and N. Peake. "Vortex shedding from a cascade of aerofoils." In 28th Fluid Dynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1997. http://dx.doi.org/10.2514/6.1997-1814.

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Wang, Yongqing, Huawei Shen, Shenghua Liu, Jinhua Gao, and Xueqi Cheng. "Cascade Dynamics Modeling with Attention-based Recurrent Neural Network." In Twenty-Sixth International Joint Conference on Artificial Intelligence. California: International Joint Conferences on Artificial Intelligence Organization, 2017. http://dx.doi.org/10.24963/ijcai.2017/416.

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An ability of modeling and predicting the cascades of resharing is crucial to understanding information propagation and to launching campaign of viral marketing. Conventional methods for cascade prediction heavily depend on the hypothesis of diffusion models, e.g., independent cascade model and linear threshold model. Recently, researchers attempt to circumvent the problem of cascade prediction using sequential models (e.g., recurrent neural network, namely RNN) that do not require knowing the underlying diffusion model. Existing sequential models employ a chain structure to capture the memory effect. However, for cascade prediction, each cascade generally corresponds to a diffusion tree, causing cross-dependence in cascade---one sharing behavior could be triggered by its non-immediate predecessor in the memory chain. In this paper, we propose to an attention-based RNN to capture the cross-dependence in cascade. Furthermore, we introduce a \emph{coverage} strategy to combat the misallocation of attention caused by the memoryless of traditional attention mechanism. Extensive experiments on both synthetic and real world datasets demonstrate the proposed models outperform state-of-the-art models at both cascade prediction and inferring diffusion tree.
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Dressaire, Emilie, Alban Sauret, Emmanuel Villermaux, and Howard Stone. "Poster: Clogging cascade." In 67th Annual Meeting of the APS Division of Fluid Dynamics. American Physical Society, 2014. http://dx.doi.org/10.1103/aps.dfd.2014.gfm.p0071.

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Noguchi, Y., and T. Shiratori. "Effects of turbulent models in transonic cascade flow computations." In Fluid Dynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1994. http://dx.doi.org/10.2514/6.1994-2344.

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HSIAO, CHINGTENG, and ODDVAR BENDIKSEN. "Finite element Euler calculations of unsteady transonic cascade flows." In Dynamics Specialists Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1992. http://dx.doi.org/10.2514/6.1992-2120.

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Reports on the topic "Cascade dynamics"

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Norris, Theodore B. Ultrafast Mid-Infrared Dynamics in Quantum Cascade Lasers. Fort Belvoir, VA: Defense Technical Information Center, January 2010. http://dx.doi.org/10.21236/ada532435.

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Brown, Martin J., Jane Kertis, and Mark H. Huff. Natural tree regeneration and coarse woody debris dynamics after a forest fire in the western Cascade Range. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 2013. http://dx.doi.org/10.2737/pnw-rp-592.

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Smith, Richard Whiting. MOLECULAR DYNAMICS SIMULATIONS OF DISPLACEMENT CASCADES IN MOLYBDENUM. Office of Scientific and Technical Information (OSTI), September 2003. http://dx.doi.org/10.2172/940236.

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Foiles, Stephen Martin. Comparison of binary collision approximation and molecular dynamics for displacement cascades in GaAs. Office of Scientific and Technical Information (OSTI), October 2011. http://dx.doi.org/10.2172/1029787.

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