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Littérature scientifique sur le sujet « Spectrum stability »

Auteur : Grafiati

Publié le 3 juin 2023

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Articles de revues sur le sujet "Spectrum stability"

Upsal, Jeremy, et Bernard Deconinck. « Real Lax spectrum implies spectral stability ». Studies in Applied Mathematics 145, n^o 4 (3 septembre 2020) : 765–90. http://dx.doi.org/10.1111/sapm.12335.

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Bermúdez, Teresa, Manuel González et Antonio Martinón. « Stability of the local spectrum ». Proceedings of the American Mathematical Society 125, n^o 2 (1997) : 417–25. http://dx.doi.org/10.1090/s0002-9939-97-03477-1.

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Grossberg, Rami, et Olivier Lessmann. « Shelah's stability spectrum and homogeneity spectrum in finite diagrams ». Archive for Mathematical Logic 41, n^o 1 (1 janvier 2002) : 1–31. http://dx.doi.org/10.1007/s001530200000.

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Hu, Yuan, Mei-ling Yu et Lian-shou Liu. « Levy Stability Index from Multifractal Spectrum ». Chinese Physics Letters 16, n^o 8 (1 août 1999) : 553–54. http://dx.doi.org/10.1088/0256-307x/16/8/003.

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Hou, Ting, Weihai Zhang et Hongji Ma. « Spectral Perspective on the Stability of Discrete-Time Markov Jump Systems with Multiplicative Noise ». Mathematical Problems in Engineering 2014 (2014) : 1–6. http://dx.doi.org/10.1155/2014/769302.

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We apply the spectrum analysis approach to address the stability of discrete-time Markov jump systems with state-multiplicative noise. In terms of the spectral distribution of a generalized Lyapunov operator, spectral criteria are presented to testify three different kinds of stochastic stabilities: asymptotic mean square stability, critical stability, and essential instability.

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Nicholls, David P. « Spectral Stability of Traveling Water Waves : Analytic Dependence of the Spectrum ». Journal of Nonlinear Science 17, n^o 4 (11 juin 2007) : 369–97. http://dx.doi.org/10.1007/s00332-006-0808-8.

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Koch, Wolfram. « Structure, stability, and vibrational spectrum of HCNKrF+ ». Journal of the Chemical Society, Chemical Communications, n^o 4 (1989) : 215. http://dx.doi.org/10.1039/c39890000215.

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Andersen, Odd Jan, et Jørgen Løvseth. « Stability modifications of the Frøya wind spectrum ». Journal of Wind Engineering and Industrial Aerodynamics 98, n^o 4-5 (avril 2010) : 236–42. http://dx.doi.org/10.1016/j.jweia.2009.10.019.

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Kuzmany, H., W. Plank, J. Winter, O. Dubay, N. Tagmatarchis et K. Prassides. « Raman spectrum and stability of(C59N)2 ». Physical Review B 60, n^o 2 (1 juillet 1999) : 1005–12. http://dx.doi.org/10.1103/physrevb.60.1005.

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Banshchikova, I. N. « Local assignability of Lyapunov exponents of linear discrete-time system ». Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta 57 (mai 2021) : 3–76. http://dx.doi.org/10.35634/2226-3594-2021-57-01.

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We consider sufficient and necessary conditions for the proportional local assignability of the Lyapunov spectrum of the system $$x(m+1)=\left(A(m)+B(m)U(m)\right)x(m), \quad m\in\mathbb Z,\quad x\in\mathbb R^n.$$ The properties of stability of the Lyapunov spectrum and integral separation of linear discrete-time systems are studied, description of the spectral set of a linear system in the case of the full spectrum stability is obtained, the property of uniform complete controllability of a linear system with discrete time is studied, and the properties of the Bebutov shell of a linear discrete-time control system are investigated.

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Thèses sur le sujet "Spectrum stability"

Baldoni, Riccardo. « Investigation of spectral stability of X-ray tubes by simulations and experimental spectrum measurements ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10574/.

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L'obiettivo di questo lavoro è quello di analizzare la stabilità di uno spettro raggi X emesso da un tubo usurato per analisi cardiovascolari, in modo da verificare il suo comportamento. Successivamente questo tipo di analisi sarà effettuata su tubi CT. Per raggiungere questo scopo è stato assemblato un particolare set-up con un rivelatore al germanio criogenico in modo da avere la miglior risoluzione energetica possibile ed alcuni particolari collimatori così da ridurre il flusso fotonico per evitare effetti di pile-up. Il set-up è stato costruito in modo da avere il miglior allineamento possibile nel modo più veloce possibile, e con l'obiettivo di rendere l'intero sistema portabile. Il tubo usato è un SRM Philips tube per analisi cardiovascolari; questa scelta è stata fatta in modo da ridurre al minimo i fattori esterni (ottica elettromagnetica, emettitori) e concentrare l'attenzione solo sugli effetti, causati dalle varie esposizioni, sull'anodo (roughness e bending) e sul comportamento di essi durante il surriscaldamento e successivo raffreddamento del tubo. I risultati mostrano come durante un'esposizione alcuni fattori di usura del tubo possono influire in maniera sostanziale sullo spettro ottenuto e quindi alterare il risultato. Successivamente, nell'elaborato, mediante il software Philips di ricostruzione e simulazione dello spettro si è cercato di riprodurre, variando alcuni parametri, la differenza riscontrata sperimentalmente in modo da poter simulare l'instabilità e correggere i fattori che la causano. I risultati sono interessanti non solo per questo esperimento ma anche in ottica futura, per lo sviluppo di applicazioni come la spectral CT. Il passo successivo sarà quello di spostare l'attenzione su un CT tube e verificare se l'instabilità riscontrata in questo lavoro è persiste anche in una analisi più complessa come quella CT.

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Grünvogel, Stefan Michael. « Lyapunov spectrum and control sets ». Augsburg [Germany] : Wissner-Verlag, 2000. http://catalog.hathitrust.org/api/volumes/oclc/45796984.html.

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Chrysler, Benjamin D., Pelaez Silvana Ayala, Yuechen Wu, Shelby D. Vorndran et Raymond K. Kostuk. « Environmental stability study of holographic solar spectrum splitting materials ». SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622712.

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In this study the impact of outdoor temperature variations and solar illumination exposure on spectral filter material and holographic optical elements is examined. Although holographic components have been shown to be useful for solar spectrum splitting designs, relatively little quantitative data exist to demonstrate the extent to which these materials can withstand outdoor conditions. As researchers seek to investigate practical spectrum splitting designs, the environmental stability of holographic materials should be considered as an important factor. In the experiment presented, two holographic materials, Covestro Bayfol HX photopolymer and dichromated gelatin, and 3M reflective polymer filter materials are exposed to outdoor conditions for a period of several months. The environmental effect on absorption, spectral and angular bandwidth, peak efficiency, and Bragg matching conditions for the holograms are examined. Spectral bandwidth and transmittance of the 3M reflective filter material are also monitored. Holographic gratings are recorded, measured, and mounted on glass substrates and then sealed with a glass cover plate. The test samples are then mounted on a photovoltaic panel to simulate realistic temperature conditions and placed at an outdoor test facility in Tucson, Arizona. A duplicate set of holograms and 3M filter material is stored as a control group and periodically compared over the test period.

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Krombach, Patricia A. « Effects of Stability Balls on Children with Autism Spectrum Disorder ». Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6107.

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Children with ASD often display behavior problems that can lead to daily academic and social disruptions. Many teachers and therapists have sought to create classroom interventions that improve the length of time a child stays seated and focused on the required task. This has led to the introduction of stability balls as an alternative seating method for children, both on the autism spectrum and with other needs. This study used a multiple baseline design and duration data to evaluate the effects of stability ball seating on attending and in-seat behavior for children with ASD who received ABA therapy in their homes. The intervention replaced their standard seating method with a stability ball. In the final phase participants chose their own seating method before beginning table work to assess preference. Following intervention the stability ball was found to increase both attending and in-seat durations for children with ASD.

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Vronskaya, Maria. « Stability of singular spectrum analysis and causality in time series ». Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/52140/.

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The concept of causality has been widely studied in econometrics and statistics since 1969, when C. J. Granger published his paper "Investigating causal relations by econometric models and cross-spectral methods". The intuitive basis for his definition of causality is the following: time series Y is causing time series X if the use of the additional information provided by Y improves the forecast of series X. In the present thesis we focus on combining Granger's causality concept with the Singular Spectrum Analysis (SSA) technique. SSA is founded on the idea of transforming the time series into a multidimensional trajectory form (Hankel matrices), Singular Value Decomposition with subsequent projection to a lower-dimensional subspace and diagonal averaging. The main aim of the present thesis is to study the causality concept through SSA prism in details and suggest a novel causality measure, which can be used outside the stationary autoregressive class, which is the framework for Granger's original causality concept. We first apply standard statistical tests directly to simulated data to assess the improvement of forecast quality of bivariate multidimensional SSA (MSSA) of time series X and Y compared with SSA of time series X only. Although the results of performance of these tests are reasonably conclusive, the simulation method is time consuming and, thus, more theoretical understanding is desirable. We solve a fundamental scaling problem of the MSSA approach by introducing so-called linearized MSSA. The linearized MSSA approach shows a way towards a causality measure, calculated from the forecast linear recurrence formula (LRF) coefficients. We finally analyze SSA and (non-linear) bivariate MSSA approach in terms of first order stability analysis under perturbations leading to the construction of a valid suitable measure of causality. The construction of the measure requires some simplifying assumptions in the stability analysis whose validity we verify for both simulated and real data.

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MOLLOY, CYNTHIA ANN. « ASSESSMENT OF POSTURAL STABILITY IN CHILDREN WITH AUTISM SPECTRUM DISORDER ». University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1006206215.

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Cramond, Alexander J. « The Longitudinal Stability of Memory in Males with Autism Spectrum Disorder ». BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3284.

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Previous research has demonstrated mixed evidence on impaired memory functioning in autism spectrum disorder (ASD), with the only consensus that there appears to be much heterogeneity. In addition, no research to date has examined the stability of memory in ASD. This study examined the stability of memory function in ASD compared to typically developing age-matched controls. Participants were administered the Test of Memory and Learning (TOMAL) twice, three years apart, in an established longitudinal NIH-supported investigation of ASD. Based on available research contrasting memory development in healthy individuals versus those with ASD, it was hypothesized that memory performance in the control group would be stable across time and that, compared to the control group, the autism group would demonstrate less stable memory function as measured by the TOMAL. Repeated Measures ANOVA and Reliable Change Index calculations of TOMAL Index and Subtest scores largely supported these hypotheses. The control group remained stable across time on all TOMAL indices and the ASD group showed improvement on the Composite Memory Index, Verbal Memory Index, and Delayed Memory Index but not the Non Verbal Memory Index. Clinical and research implications are discussed.

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Song, Degong. « On the Spectrum of Neutron Transport Equations with Reflecting Boundary Conditions ». Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/26375.

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This dissertation is devoted to investigating the time dependent neutron transport equations with reflecting boundary conditions. Two typical geometries --- slab geometry and spherical geometry --- are considered in the setting of L^p including L^1. Some aspects of the spectral properties of the transport operator A and the strongly continuous semigroup T(t) generated by A are studied. It is shown under fairly general assumptions that the accumulation points of { m Pas}(A):=sigma (A) cap { lambda :{ m Re}lambda > -lambda^{ast} }, if they exist, could only appear on the line { m Re}lambda =-lambda^{ast}, where lambda^{ast} is the essential infimum of the total collision frequency. The spectrum of T(t) outside the disk {lambda : |lambda| leq exp (-lambda^{ast} t)} consists of isolated eigenvalues of T(t) with finite algebraic multiplicity, and the accumulation points of sigma (T(t)) igcap{ lambda : |lambda| > exp (-lambda^{ast} t)}, if they exist, could only appear on the circle {lambda :|lambda| =exp (-lambda^{ast} t)}. Consequently, the asymptotic behavior of the time dependent solution is obtained.
Ph. D.

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Feng, He. « A Study on Heterotic Target Space Duality – Bundle Stability/Holomorphy, F-theory and LG Spectra ». Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/102383.

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In the context of (0, 2) gauged linear sigma models, we explore chains of perturbatively dual heterotic string compactifications. The notion of target space duality (TSD) originates in non-geometric phases and can be used to generate distinct GLSMs with shared geometric phases leading to apparently identical target space theories. To date, this duality has largely been studied at the level of counting states in the effective theories. We extend this analysis in several ways. First, we consider the correspondence including the effective potential and loci of enhanced symmetry in dual theories. By engineering vector bundles with non-trivial constraints arising from slope-stability (i.e. D-terms) and holomorphy (i.e. F-terms) the detailed structure of the vacuum space of the dual theories can be explored. Our results give new evidence that GLSM target space duality may provide important hints towards a more complete understanding of (0,2) string dualities. In addition, we consider TSD theories on elliptically fibered Calabi-Yau manifolds. In this context, each half of the "dual" heterotic theories must in turn have an F-theory dual. Moreover, the apparent relationship between two heterotic compactifications seen in (0,2) heterotic target space dual pairs should, in principle, induce some putative correspondence between the dual F-theory geometries. It has previously been conjectured in the literature that (0,2) target space duality might manifest in F-theory as multiple K3- fibrations of the same elliptically fibered Calabi-Yau manifold. In this work we investigate this conjecture in the context of both six-dimensional and four-dimensional effective theories and demonstrate that in general, (0,2) target space duality cannot be explained by such a simple phenomenon alone. Finally, we consider Landau-Ginzburg (LG) phases of TSD theories and explore their massless spectrum. In particular, we investigate TSD pairs involving geometric singularities. We study resolutions of these singularities and their relationship to the duality.
Doctor of Philosophy

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Weldhagen, Gerhard Frederick. « Laboratory Detection and Gene Cassette Stability of the Novel Extended-Spectrum Beta-Lactamase, GES-2 from Pseudomonas aeruginosa ». Thesis, University of Pretoria, 2004. http://hdl.handle.net/2263/29221.

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Extended-spectrum beta-lactamases (ESBLs) in Pseudomonas aeruginosa tend to be geographically scattered, such as GES-2, which partially compromises the efficacy of imipenem. The G170N mutation, ascribed to a CC to AA base pair substitution on positions 493-494 of the blaGES-2 coding region, distinguishes this ESBL from blaGES-1 and the blaIBC-type genes, making it an ideal target for developing a novel sequence-specific, peptide nucleic acid (PNA)-based, multiplex-PCR detection method. Utilizing two primer pairs in conjunction with a PNA probe, this novel method delivered accurate identification of blaGES-2 compared to standard PCR and gene sequencing techniques, when tested against one hundred (n = 100) P. aeruginosa clinical isolates as well as previously published, well-described control strains. This method has the potential to be used in large-scale, cost-effective screening programmes for specific or geographically restricted ESBLs. To date, in addition to being only described in South Africa, GES-2 is notoriously difficult to identify in P. aeruginosa, using standard methodology. A real-time PCR method using the LightCycler™ was compared to a two-step nested-PCR assay for the detection of blaGES and blaIBC genes from one hundred P. aeruginosa clinical isolates collected over a four-year period from two teaching hospitals in Pretoria, South Africa. Real-time PCR amplification was monitored through hybridisation of fluorescently labelled probes followed by melting curve analysis to detect the relevant G170N mutation occurring in the omega loop region of blaGES-2. Nested-PCR products were subjected to automated DNA sequencing and compared to melting point (Tm) analyses results obtained from the LightCycler assay. Real time and nested-PCR assays detected a blaIBC gene product from 83 and 88 clinical isolates respectively, with the LightCycler thus exhibiting a sensitivity of 94.3% compared to the nested-PCR assay. Comparison of Tm and gene sequencing data however revealed 100% specificity for sequence specific detection of blaGES-2 with the LightCycler. One clinical isolate was found to harbour a blaGES-1 gene, making this the first report of this specific ESBL from South Africa. Selective antibiotic pressure has recently been implicated as a possible driving force behind point mutations observed in blaGES–type genes. This part of the study subjected two well-characterized clinical isolates with class 1 integron-borne blaGES-type genes to five days incubation in the presence of sub-inhibitory concentrations of 15 different antibiotics, including beta-lactams, aminoglycosides and quinolones. Restriction enzyme analysis and DNA sequencing of blaGES-1, blaGES-2 and their immediate upstream genetic environments failed to demonstrate any changes compared to non-exposed controls. Short-term exposure to a sub-inhibitory level of a single antimicrobial agent is thus unlikely to select significant mutations in these beta-lactamase genes or their regulatory mechanisms.
Thesis (PhD (Medical Microbiology))--University of Pretoria, 2006.
Medical Microbiology
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Livres sur le sujet "Spectrum stability"

Canada, Geological Survey of. Analysis of the Remanence Coercivity Spectrum by Continuous and Alternating Fields : Relationship Between Coercivity and Alternating Fields Stability Spectra. S.l : s.n, 1986.

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Roy, Jean L. The analysis of the remanence coercivity spectrum by continuous and alternating fields : Relationship between coercivity and alternating fields stability spectra. Ottawa, Canada : Geological Survey of Canada, 1986.

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Polites, Michael E. A general-purpose balloon-borne pointing system for solar scientific instruments. [Washington, D.C.] : National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1990.

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Polites, Michael E. A general-purpose balloon-borne pointing system for solar scientific instruments. Huntsville, Ala : George C. Marshall Space Flight Center, 1990.

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Matrix equations, spectral problems and stability of dynamic systems. Cottenham : Cambridge Scientific Publishers, 2008.

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Kapitula, Todd, et Keith Promislow. Spectral and Dynamical Stability of Nonlinear Waves. New York, NY : Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-6995-7.

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Gottlieb, David. Stability analysis of spectral methods for hyperbolic initial-boundary value sytems. Hampton, Va : ICASE, 1986.

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Eadie, Leila. Further evaluation of 5-hydroxytryptophol as a biological state marker of alcohol consumption : levels of 5-HTOL across a spectrum of drinking behaviour, and tests of the stability and reliability of the ratio with 5-HIAA. [Guildford] : University of Surrey, 1999.

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Taylor, Mark. A high performance spectral code for nonlinear MHD stability. [New York] : Courant Institute of Mathematical Sciences, New York University, 1992.

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Chapitres de livres sur le sujet "Spectrum stability"

Arendt, Wolfgang. « Countable Spectrum, Transfinite Induction and Stability ». Dans Operator Semigroups Meet Complex Analysis, Harmonic Analysis and Mathematical Physics, 31–48. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18494-4_3.

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Gorban, Igor I. « Dependence of the Statistical Stability of a Stochastic Process on Its Spectrum-Correlation Characteristics ». Dans The Statistical Stability Phenomenon, 55–74. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-43585-5_4.

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Mohr, Ryan, et Igor Mezić. « Koopman Spectrum and Stability of Cascaded Dynamical Systems ». Dans Lecture Notes in Control and Information Sciences, 99–129. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-35713-9_5.

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Wedig, W. « Mean Square Stability and Spectrum Identification of Nonlinear Stochastic Systems ». Dans Nonlinear Stochastic Dynamic Engineering Systems, 135–52. Berlin, Heidelberg : Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-83334-2_10.

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Linh, Vu Hoang, et Do Duc Thuan. « Spectrum-Based Robust Stability Analysis of Linear Delay Differential-Algebraic Equations ». Dans Numerical Algebra, Matrix Theory, Differential-Algebraic Equations and Control Theory, 533–57. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15260-8_19.

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Aarten, Sander Ruben. « Deterrence (In)stability Between India and Pakistan ». Dans NL ARMS, 215–30. The Hague : T.M.C. Asser Press, 2020. http://dx.doi.org/10.1007/978-94-6265-419-8_12.

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AbstractSince the introduction of India’s cold start and Pakistan’s full spectrum deterrence doctrines, the subcontinental deterrence landscape has been characterised by strong cross-domain dynamics. In extremis, if both states adhere to the threats issued in their doctrines a Pakistan-supported militant attack on Indian soil could escalate into an all-out nuclear exchange. It is a development that has been met with great concern by many analysts for its detrimental impact on deterrence stability. Since the doctrines are believed to have become operational, at least four incidents occurred which could have sparked this cross-domain escalation spiral. And yet, crisis behaviour proved vastly different from what doctrine predicted. What does this say about deterrence stability on the subcontinent? This chapter assesses deterrence stability on the basis of perfect deterrence theory, which is argued to provide a more nuanced view of deterrence relationships than classical deterrence theory. It finds support for the stability-instability paradox and argues that deterrence is less unstable than appears at first sight. Furthermore, to fully appreciate the degree of deterrence stability, it is suggested that the factors ‘context’ and ‘narrative’ should be included into the equation.

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Di Lena, G., et D. Trigiante. « On the spectrum of families of matrices with applications to stability problems ». Dans Numerical Methods for Ordinary Differential Equations, 36–53. Berlin, Heidelberg : Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/bfb0089230.

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Sipahi, Rifat. « Design of Imaginary Spectrum of LTI Systems with Delays to Manipulate Stability Regions ». Dans Advances in Delays and Dynamics, 127–40. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53426-8_9.

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VanZandt, Thomas E., et David C. Fritts. « A Theory of Enhanced Saturation of the Gravity Wave Spectrum Due to Increases in Atmospheric Stability ». Dans Middle Atmosphere, 399–420. Basel : Birkhäuser Basel, 1989. http://dx.doi.org/10.1007/978-3-0348-5825-0_16.

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Yusop, Mohd Rafii, Yusuff Oladosu, Abdul Rahim Harun, Asfaliza Ramli, Ghazali Hussin, Mohd Razi Ismail et Norhani Abdullah. « Application of mutation techniques and genotype × environment interaction for grain yield in ion beam induced mutant rice lines tested in multiple locations in Malaysia. » Dans Mutation breeding, genetic diversity and crop adaptation to climate change, 226–34. Wallingford : CABI, 2021. http://dx.doi.org/10.1079/9781789249095.0023.

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Abstract Genotype evaluation for stability and high yield in rice is an important factor for sustainable rice production and food security. These evaluations are essential, especially when the breeding objective is to release rice with high yields, adaptability and stability for commercial cultivation. To achieve this objective, this study was carried out to select high-yielding rice genotypes induced by ion beam irradiation. Seeds of the rice variety 'MR219' were subjected to different doses of 320 MeV carbon-ion beam irradiation to determine the optimum dose to produce high mutant frequency and spectrum. The optimum dose was 60 Gy. After several cycles of selection and fixation between 2009 and 2014 (M₀-M₆), six prospective lines with desirable characters were selected at the M6 generation. The selected mutant lines along with other mutant varieties were then tested at five locations in two planting seasons to select high-yielding and stable genotypes. The experiment was conducted in a randomized complete block design with three replications across the locations and seasons. The pooled analysis of variance revealed highly significant differences (p ≤ 0.01, 0.05) among genotypes, among locations and among genotypes by location by season (G×L×S interaction) for the yield traits except for seasons and genotype by season (G×S interaction). Based on univariate and multivariate stability parameters, rice genotypes were classified into three main categories. The first group comprised genotypes with high yield stability along with high yield per hectare. These genotypes include ML4 and ML6 and are widely adapted to diverse environmental conditions. One line exhibited high yield per hectare but low stability; this genotype (ML9) is suitable for specific environments. The last group had low yield per hectare and high stability and included 'MR220', 'Binadhan4' and 'Binadhan7'. This final group is more suitable for breeding specific traits or perhaps has yield component compensation. Hence, rice mutant lines ML4 and ML6 were recommended for commercial cultivation in Malaysia.

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Actes de conférences sur le sujet "Spectrum stability"

Jogl, C., H. Kuzmany, M. Krause, W. Plank, O. Dubay, N. Tagmatarchis et K. Prassides. « Raman spectrum and stability of ». Dans ELECTRONIC PROPERTIES OF NOVEL MATERIALS--SCIENCE AND TECHNOLOGY OF MOLECULAR NANOSTRUCTURES. ASCE, 1999. http://dx.doi.org/10.1063/1.59834.

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Mizuno, Yosuke. « Stability of magnetized spine sheath relativistic jets ». Dans Workshop on Blazar Variability across the Electromagnetic Spectrum. Trieste, Italy : Sissa Medialab, 2009. http://dx.doi.org/10.22323/1.063.0050.

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Walker, M. L. « Monopole Condensate Stability in three- and four-colour QCD ». Dans QUARK CONFINEMENT AND THE HADRON SPECTRUM VII : 7th Conference on Quark Confinement and the Hadron Spectrum - QCHS7. AIP, 2007. http://dx.doi.org/10.1063/1.2714381.

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Yang, Hua, Jing Li, Ran Yao, Pengzhi Lu et Yanrong Pei. « The stability of spectrum reproduction by LEDs ». Dans SPIE Optical Engineering + Applications, sous la direction de Matthew H. Kane, Jianzhong Jiao, Nikolaus Dietz et Jian-Jang Huang. SPIE, 2015. http://dx.doi.org/10.1117/12.2187169.

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Lucha, Wolfgang. « Full Salpeter Equation with Confining Interactions : Analytic Stability Proof ». Dans VIIIth Conference Quark Confinement and the Hadron Spectrum. Trieste, Italy : Sissa Medialab, 2012. http://dx.doi.org/10.22323/1.077.0164.

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Yu, Yuefeng, Jun Ma et Haojie Fan. « Spectral Analysis of Pulverized Coal Combustion Stability ». Dans ASME 2005 Power Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pwr2005-50323.

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Flame detecting and diagnosis of combustion in modern coal-fired boilers are very important to the safe and economical operating of power generation unit. So the effective real-time detection of combustion flame stability and in-time judgment are necessary. One of the important characteristics of combustion flame is a combination of flame jet fluctuation and flickering of flame radiation, which is a time random variable and reflects the combustion conditions. In this paper, after the data are acquired through the tests in our university’s laboratory, the power spectrum analysis using algorithm of fast Fourier transformation (FFT) and a self-organized neural network are applied into a diagnostic system for combustion conditions. At first, a time series of radiation intensity values of the flame, which fluctuate at a mean intensity value with a certain frequency are obtained through the photoelectric sensor. And then the time signal is converted to the power spectrum signal through the processing of FFT. Under the stable and unstable combustion conditions, the spectral intensity of the low frequency component of the converted signal has distinct magnitude. According to this method, software for the power spectrum analysis and the self-organized neural networks has been developed.

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Leible, Benedikt, Daniel Plabst et Norbert Hanik. « Stability of the Full Spectrum Nonlinear Fourier Transform ». Dans 2020 22nd International Conference on Transparent Optical Networks (ICTON). IEEE, 2020. http://dx.doi.org/10.1109/icton51198.2020.9203355.

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Chrysler, Benjamin D., Silvana Ayala Pelaez, Yuechen Wu, Shelby D. Vorndran et Raymond K. Kostuk. « Environmental stability study of holographic solar spectrum splitting materials ». Dans SPIE Optics + Photonics for Sustainable Energy, sous la direction de Oleg V. Sulima et Gavin Conibeer. SPIE, 2016. http://dx.doi.org/10.1117/12.2237071.

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Warschinke, Matthias, Ryutaro Matsudo, Shogo Nishino, Toru Shinohara et Kei-Ichi Kondo. « Composite operator and condensate in SU(N) Yang-Mills theory with U(N-1) stability group ». Dans XIII Quark Confinement and the Hadron Spectrum. Trieste, Italy : Sissa Medialab, 2019. http://dx.doi.org/10.22323/1.336.0066.

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Burnier, Yannis, Olaf Kaczmarek et Alexander Rothkopf. « The Bayesian reconstruction of the in-medium heavy quark potential from lattice QCD and its stability ». Dans XITH CONFERENCE ON QUARK CONFINEMENT AND HADRON SPECTRUM. AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4938726.

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Rapports d'organisations sur le sujet "Spectrum stability"

S. P. Smith et S. C. Jardin. Ideal Magnetohydrodynamics Stability Spectrum with a Resistive Wall. Office of Scientific and Technical Information (OSTI), mai 2008. http://dx.doi.org/10.2172/959380.

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Andrews, Frank L. A Stability Force : The Missing Link in Achieving Full-Spectrum Dominance. Fort Belvoir, VA : Defense Technical Information Center, mai 2004. http://dx.doi.org/10.21236/ada426864.

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Fardad, Makan, et Bassam Bamieh. On Stability and the Spectrum Determined Growth Condition for Spatially Periodic Systems. Fort Belvoir, VA : Defense Technical Information Center, janvier 2005. http://dx.doi.org/10.21236/ada458859.

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Roy, J. L. The analysis of the remanence coercivity spectrum by continuous and alternating fields : relationship between coercivity and alternating fields stability spectra. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/121063.

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Hilmes, Andrew C. Full Spectrum Operations - The Continuation of Major Combat Operations by Other Means : Making the Transition to Stability and Reconstruction Operations at the Division Level. Fort Belvoir, VA : Defense Technical Information Center, mai 2007. http://dx.doi.org/10.21236/ada470663.

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ji, yuqin, hao tian, qiang ye, zhuoyan ye et zeyu zheng. Effectiveness of exercise intervention on improving fundamental motor skills in children with autism spectrum disorder : A systematic review and Meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, décembre 2022. http://dx.doi.org/10.37766/inplasy2022.12.0013.

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Review question / Objective: This systematic review and meta-analysis aimed to synthesize available randomized controlled trial studies concerning the effects of exercise interventions on fundamental motor skills in children with autism spectrum disorder. Condition being studied: Autism Spectrum Disorder (ASD) is a complicated and highly prevalent neuro-developmental disorder characterized by deficits in social communication, restricted interests, and repetitive behaviors. The CDC reported that the prevalence of ASD was estimated to be 1 in 59 in the United States by 2020. Along with typical symptoms, a couple of studies have indicated that individuals with ASD encounter a variety of challenges, including sleep disturbance, obesity, executive function deficits, physical inactivity, and motor dysfunctions. Fundamental motor skills (FMS) are the unnaturally occurring basic motor learning model of the human body, which are the building blocks for advanced specialized motor skills and for children and adolescents to participate in sports, games, or other context-specific physical activity.FMS falls into three different categories: (a) locomotor skills (e.g., running and hopping), (b) object control skills (e.g., catching and throwing), and balance or stability skills (e.g., balancing and twisting).

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Hoitink, Harry A. J., Yitzhak Hadar, Laurence V. Madden et Yona Chen. Sustained Suppression of Pythium Diseases : Interactions between Compost Maturity and Nutritional Requirements of Biocontrol Agents. United States Department of Agriculture, juin 1993. http://dx.doi.org/10.32747/1993.7568755.bard.

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Several procedures were developed that predict maturity (stability) of composts prepared from municipal solid wastes (MSW). A respirometry procedure, based O2 uptake by compost, predicted (R2=0.90) the growth response of ryegrass in composts and an acceptable level of maturity. Spectroscopic methods (CPMAS13-NMR and DRIFT spectroscopy) showed that the stabilizing compost contained increasing levels of aromatic structures. All procedures predicted acceptable plant growth after approximately 110 days of composting. MSW compost suppressed diseases caused by a broad spectrum of plant pathogens including Rhizoctonia solani, Pythium aphanidermatum and Fusarium oxysporum. A strain of Pantoea agglomerans was identified that caused lysis of hyphae of R. solani. Evidence was obtained, suggesting that thermophilic biocontrol agents also might play a role in suppression. 13C-NMR spectra revealed that the longevity of the suppressive effect against Pythium root rot was determined by the concentration of readily biodegradable carbohydrate in the substrate, mostly present as cellulose. Bacterial species capable of inducing biocontrol were replaced by those not effective as suppression was lost. The rate of uptake of 14C-acetate into microbial biomass in the conducive substrate was not significantly different from that in the suppressive substrate although specific activity was higher. The suppressive composts induced systemic acquired resistance in cucumjber roots to Pythium root rot and to anthracnose in the foliage. Composts also increased peroxidase activity in plants by the conducive substrate did not have these effects. In summary, the composition of the organic fraction determined bacterial species composition and activity in the substrate, which in turn regulated plant gene expression relative to biological control.

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Taylor, M. A high performance spectral code for nonlinear MHD stability. Office of Scientific and Technical Information (OSTI), septembre 1992. http://dx.doi.org/10.2172/6941036.

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Taylor, M. A high performance spectral code for nonlinear MHD stability. Office of Scientific and Technical Information (OSTI), septembre 1992. http://dx.doi.org/10.2172/10113306.

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