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Relevant bibliographies by topics / Spectral transition

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Academic literature on the topic 'Spectral transition'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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Journal articles on the topic "Spectral transition"

1

Ding, Nan, Qiusheng Gu, Yunyong Tang, Xiongfei Geng, Yongyun Chen, and Xiaotong Guo. "A Special State Transition in the Blazar OT 081: Implication for the Unified State Transition Paradigm of Different-scale Black Hole Systems." Astrophysical Journal 944, no. 1 (2023): 12. http://dx.doi.org/10.3847/1538-4357/acae97.

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Abstract Exploring the similar behavior of black hole systems with different scales will provide insight into the unified physical laws of black hole systems. Here, we report a special spectral state transition process in blazar OT 081, which is driven by a supermassive black hole. Based on the X-ray flux versus photon index distribution, stacked average X-ray spectra, L 2500Å − α ox parameters, and broadband spectral energy distributions, we conducted a pilot study on the spectral state transition for this blazar system. The analysis results suggest that the source transitions through a stead

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Uddin, Zaheer, Muhammad Kaleem, Saba Javaid, and Roohi Zafar. "Transition Probabilities, Oscillator and Line Strengths in Sc XIX." East European Journal of Physics, no. 2 (June 1, 2024): 111–20. http://dx.doi.org/10.26565/2312-4334-2024-2-09.

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Scandium XIX ion is a member of the isoelectronic sequence of Li-like ions. Numerical coulomb approximation and quantum defect theory have been used to calculate energies, quantum defects & transition probabilities, oscillator, and line strengths of Sc XIX ion for the transitions ns → mp, np → ms, np → md, and nd → mp Rydberg series. The energies of Sc XIXX ions up to n = 5 are given in the NIST database and the literature. We used quantum defect theory and determined the energies and quantum defects up to n = 30. The energies and quantum defects of 125 levels are reported for the first ti

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Yuan, Bo, Koichi Murayama, and Huiming Yan. "Study of Thermal Dynamics of Defatted Bovine Serum Albumin in D2O Solution by Fourier Transform Infrared Spectra and Evolving Factor Analysis." Applied Spectroscopy 61, no. 9 (2007): 921–27. http://dx.doi.org/10.1366/000370207781745919.

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Fourier transform infrared (FT-IR) spectra have been measured for defatted bovine serum albumin (BSA) in D2O with a concentration of 2.0 wt % over a temperature range of 26–90 °C and the corresponding difference spectra have been calculated by subtracting the contribution of D2O at the same temperature. Evolving factor analysis (EFA) by selecting two factors and three factors has been employed to analyze the temperature-dependent difference IR spectra in the 1700–1600 cm−1 spectral region of the defatted BSA in D2O solution. Three-factor EFA has been employed to determine the distinction of th

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Крылов, А. С., А. Н. Втюрин, В. Н. Воронов та С. Н. Крылова. "Проявление структурных фазовых переходов в кристалле Rb-=SUB=-2-=/SUB=-KLuF-=SUB=-6-=/SUB=- в спектрах комбинационного рассеяния света". Журнал технической физики 126, № 4 (2019): 423. http://dx.doi.org/10.21883/os.2019.04.47510.301-18.

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AbstractThe Raman spectra of an Rb_2KLuF_6 crystal are studied in the temperature range from 8 to 375 K, which includes two phase transitions: one of which proceeds from a cubic to a tetragonal phase, while the other transition takes place from a tetragonal to a monoclinic phase. An analysis of the temperature dependences of parameters of spectral lines shows that the former transition is of the second kind, while the latter transition is of the first kind, close to the tricritical point. It is shown that the structural phase transitions in the Rb_2KLuF_6 double perovskite are not associated w

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Sang, Cuicui, Feng Chen, Chao Chen та Bingcong Gou. "Kα transition probabilities of C-like to F-like Al ions". Canadian Journal of Physics 93, № 3 (2015): 267–70. http://dx.doi.org/10.1139/cjp-2014-0135.

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Kα radiative transitions of C-like to F-like Al ions are studied using the multiconfiguration Dirac–Fock (MCDF) method. The fully relativistic MCDF approach was specifically designed to calculate atomic structures and radiative transition rates, and hence it ensures a reasonable description of the emission effects and spectral intensities. The energies and wavefunctions, corresponding mixing coefficients, the influence of electron correlation effects on energy levels, and radiative transition rates for C-like to F-like Al ions are investigated in detail. Good agreement is found between the cal

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Geballe, T. R., X. Fan, D. A. Golimowski, G. R. Knapp, and S. K. Leggett. "The Transition from L to T: Chemistry and Classification." Symposium - International Astronomical Union 211 (2003): 369–76. http://dx.doi.org/10.1017/s0074180900210942.

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The growing numbers of brown dwarfs have largely been divided into two new spectral classes, L and T. Subclassification systems for L, based on optical (0.6–1.0 μm) spectra, have existed since 1999, but there is a need for infrared systems for both spectral classes. The differences in the infrared (1.0–2.5 μm) characteristics of L spectra and T spectra observed prior to 2000 are huge, all then-known T dwarfs showing strong methane absorption bands, and all L dwarfs devoid of these bands. However, in the last 2–3 years a significant number of brown dwarfs with infrared spectra in transition bet

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Zhang, Hua, Xin Wang, and Haochen Yuan. "Effects of Waves on the Spectral Anisotropy of the Transition Range in Solar Wind Turbulence." Astrophysical Journal 985, no. 1 (2025): 56. https://doi.org/10.3847/1538-4357/adc9a8.

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Abstract In the transition range of the solar wind turbulence, the magnetic spectrum has been observed to be strongly anisotropic with respect to the local mean field. However, the generation mechanism of the anisotropy remains not well understood. There are two typical types of waves existing in the transition range, including ion cyclotron waves (ICWs) and kinetic Alfvén waves (KAWs) propagating in the directions parallel and perpendicular to the magnetic field, respectively. In this work, we perform a statistical study about the effects of the waves on the spectral anisotropy of the transit

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Michalenko, Joshua J., Christopher M. Murzyn, Joshua D. Zollweg, Lydia Wermer, Alan J. Van Omen, and Michael D. Clemenson. "Machine Learning Predictions of Transition Probabilities in Atomic Spectra." Atoms 9, no. 1 (2021): 2. http://dx.doi.org/10.3390/atoms9010002.

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Forward modeling of optical spectra with absolute radiometric intensities requires knowledge of the individual transition probabilities for every transition in the spectrum. In many cases, these transition probabilities, or Einstein A-coefficients, quickly become practically impossible to obtain through either theoretical or experimental methods. Complicated electronic orbitals with higher order effects will reduce the accuracy of theoretical models. Experimental measurements can be prohibitively expensive and are rarely comprehensive due to physical constraints and sheer volume of required me

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Bury, T. M., C. T. Bauch, and M. Anand. "Detecting and distinguishing tipping points using spectral early warning signals." Journal of The Royal Society Interface 17, no. 170 (2020): 20200482. http://dx.doi.org/10.1098/rsif.2020.0482.

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Theory and observation tell us that many complex systems exhibit tipping points—thresholds involving an abrupt and irreversible transition to a contrasting dynamical regime. Such events are commonly referred to as critical transitions. Current research seeks to develop early warning signals (EWS) of critical transitions that could help prevent undesirable events such as ecosystem collapse. However, conventional EWS do not indicate the type of transition, since they are based on the generic phenomena of critical slowing down. For instance, they may fail to distinguish the onset of oscillations

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Ward, Jacob W., Jacqueline J. Li, Jared Schwartz, Gillian Nave, Ton A. J. J. Raassen, and Peter H. M. Uylings. "Branching Fractions and Transition Probabilities for UV Transitions in the Spectrum of Cr ii." Astrophysical Journal 959, no. 1 (2023): 8. http://dx.doi.org/10.3847/1538-4357/acfafe.

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Abstract We present transition probabilities for 268 spectral lines of singly ionized chromium (Cr ii) in the wavelength region 208–414 nm. Branching fractions were measured in archival Fourier transform spectra of chromium-argon and chromium-neon hollow cathode lamps and a Penning discharge source. The branching fractions were combined with previously published experimental lifetimes of 14 levels, and with lifetimes from semiempirical calculations for 14 levels to give transition probabilities. The estimated uncertainties of the transition probabilities range from 10% to 26%. A comparison wit

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Dissertations / Theses on the topic "Spectral transition"

1

Brown, C. A. "Ligand field spectral intensities." Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377247.

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Essex, Sarah Jane. "Spectral intensities in planar copper(II) complexes." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239622.

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Malm, Johan. "Spectral-element simulations of turbulent wall-bounded flows including transition and separation." Doctoral thesis, KTH, Stabilitet, Transition, Kontroll, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-50294.

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The spectral-element method (SEM) is used to study wall-bounded turbulent flowsin moderately complex geometries. The first part of the thesis is devoted to simulations of canonical flow cases, such as temporal K-type transitionand turbulent channel flow, to investigate general resolution requirements and computational efficiency of the numerical code nek5000. Large-eddy simulation (LES) is further performed of a plane asymmetric diffuser flow with an opening angle of 8.5 degrees, featuring turbulent flow separation. Good agreement with numerical studies of Herbst (2007) is obtained, and it is

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Ueda, Ｊunpei. "Spectral conversion materials using rare earth and transition metal ions for green photonics." Kyoto University, 2012. http://hdl.handle.net/2433/157659.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(人間・環境学)<br>甲第16948号<br>人博第591号<br>新制||人||141(附属図書館)<br>23||人博||591(吉田南総合図書館)<br>29623<br>京都大学大学院人間・環境学研究科相関環境学専攻<br>(主査)教授田部勢津久, 教授杉山雅人, 教授加藤立久<br>学位規則第4条第1項該当

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Raman, Pujita. "Speaker Identification and Verification Using Line Spectral Frequencies." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/52964.

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State-of-the-art speaker identification and verification (SIV) systems provide near perfect performance under clean conditions. However, their performance deteriorates in the presence of background noise. Many feature compensation, model compensation and signal enhancement techniques have been proposed to improve the noise-robustness of SIV systems. Most of these techniques require extensive training, are computationally expensive or make assumptions about the noise characteristics. There has not been much focus on analyzing the relative importance, or speaker-discriminative power of different

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Kinet, Maxime. "MHD turbulence at low magnetic Reynolds number: spectral propertiesand transition mechanism in a square duct." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210271.

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Magnetohydrodynamics describes the motions of an electrically conducting fluid under the influence of magnetic fields. Such flows are encountered in a large variety of applications, from steel industry to heat exchangers of nuclear fusion reactors. <p><p>Here we are concerned with situations where the magnetic field is relatively strong and the flow manifests turbulent motions. The interaction of the fluid with the electromagnetic field is still insufficiently understood and efficient predicting methods are lacking. Our goal is to provide more insight on this problem by making heavy use of num

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Tugluk, Ozan. "Direct Numerical Simulation Of Pipe Flow Using A Solenoidal Spectral Method." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614293/index.pdf.

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In this study, which is numerical in nature, direct numerical simulation (DNS) of the pipe flow is performed. For the DNS a solenoidal spectral method is employed, this involves the expansion of the velocity using divergence free functions which also satisfy the prescribed boundary conditions, and a subsequent projection of the N-S equations onto the corresponding dual space. The solenoidal functions are formulated in Legendre polynomial space, which results in more favorable forms for the inner product integrals arising from the Petrov-Galerkin scheme employed. The developed numerical scheme

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Goldsby, Anthony Lee. "Establishment, drought tolerance and recovery, and canopy analysis of turfgrasses in the transition zone." Diss., Kansas State University, 2013. http://hdl.handle.net/2097/15416.

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Doctor of Philosophy<br>Department of Horticulture, Forestry, and Recreation Resources<br>Dale J. Bremer<br>Jack Fry<br>Increasing water scarcity may result in greater irrigation restrictions for turfgrass. Drought tolerance and recovery of Kentucky bluegrasses (Poa. pratensis L.) (KBG) were evaluated during and after 88 and 60 day dry downs in 2010 and 2011, respectively, under a rainout shelter. Changes in green coverage were evaluated with digital images. Green coverage declined slowest during dry downs and increased fastest during recoveries in the cultivar ‘Apollo’, indic

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Lefort, Eric. "Caractérisation des bifurcations et de la dynamique d'une lentille thermique par analyse spectrale." Rouen, 1987. http://www.theses.fr/1987ROUES019.

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Un faisceau laser est focalisé sur la face d'entrée d'une cuve transparente remplie d'un liquide absorbant. Une lentille thermique est formée; les oscillations de la lentille sont la manifestation visible d'oscillations hydrodynamiques du liquide dans la cuve. Le système présente un comportement de transition laminaire turbulente, un certain nombre de bifurcations ayant été observées. Analyse spectrale du signal temporel

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Vieira, Ewerton Rocha 1987. "Transition matrix theory = Teoria da matriz de transição." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/307536.

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Orientador: Ketty Abaroa de Rezende<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Matemática Estatística e Computação Científica<br>Made available in DSpace on 2018-08-26T22:09:01Z (GMT). No. of bitstreams: 1 Vieira_EwertonRocha_D.pdf: 1632095 bytes, checksum: 5dc3208efc5649260ca62805c3e8e1b6 (MD5) Previous issue date: 2015<br>Resumo: Nessa tese, apresentamos uma unificação da teoria das matrizes de transição algébrica, singular, topológica e direcional ao introduzir a matriz de transição (generalizada), a qual engloba todas as quatros citadas anteriormente. Alguns r

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Books on the topic "Spectral transition"

1

Yousuff, Hussaini M., and Langley Research Center, eds. A three-dimensional spectral algorithm for simulations of transition and turbulence. National Aeronautics and Space Administration, Langley Research Center, 1985.

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Yousuff, Hussaini M., and Langley Research Center, eds. A three-dimensional spectral algorithm for simulations of transition and turbulence. National Aeronautics and Space Administration, Langley Research Center, 1985.

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E, Ashpis D., Sohn Ki-Hyeon, and Lewis Research Center, eds. Demonstration of wavelet techniques in the spectral analysis of bypass transition data. National Aeronautics and Space Administration, Lewis Research Center, 1997.

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4

C, Canuto, ed. Spectral methods in fluid dynamics. 3rd ed. Springer-Verlag, 1988.

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1921-, Rao K. Narahari, ed. Handbook of infrared standards: With spectral maps and transition assignments between 3 and 2600 um. Academic, 1986.

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Guelachvili, Guy. Handbook of infrared standards: With spectral maps and transition assignments between 3 and 2600 [mu]m. Academic Press, 1986.

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E, Estes J., and United States. National Aeronautics and Space Administration., eds. Final technical report to NASA - Johnson Space Center: COVER project and earth resources research transition. National Aeronautics and Space Administration, 1986.

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8

Mariska, John T. The solar transition region. Cambridge University Press, 1992.

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Giovanni, Moruzzi, ed. Microwave, infrared, and laser transitions of methanol: Atlas of assigned lines from 0 to 1258 cm⁻¹. CRC Press, 1995.

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H, Yersin, and Blasse G, eds. Electronic and vibronic spectra of transition metal complexes I. Springer-Verlag, 1994.

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Book chapters on the topic "Spectral transition"

1

Shivamoggi, Bhimsen K. "Spectral Laws for the Compressible Isotropic Turbulence." In Instability, Transition, and Turbulence. Springer New York, 1992. http://dx.doi.org/10.1007/978-1-4612-2956-8_50.

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Levine, R. D. "Fluctuations in Spectral Intensities and Transition Rates." In Advances in Chemical Physics. John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470141199.ch3.

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Danabasoglu, G., S. Biringen, and C. L. Streett. "A Spectral Multi-Domain Code for the Navier-Stokes Equations." In Instability, Transition, and Turbulence. Springer New York, 1992. http://dx.doi.org/10.1007/978-1-4612-2956-8_27.

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Reuter, Jörg, and Dietmar Rempfer. "A Hybrid Spectral/Finite-Difference Scheme for the Simulation of Pipe-Flow Transition." In Laminar-Turbulent Transition. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-03997-7_57.

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Henderson, Ronald D. "Adaptive Spectral Element Methods for Turbulence and Transition." In High-Order Methods for Computational Physics. Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-03882-6_3.

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Exner, Pavel, and Jiří Lipovský. "Spectral Transition Model with the General Contact Interaction." In From Complex Analysis to Operator Theory: A Panorama. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-31139-0_19.

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Ballhausen, C. J. "Intensities of Spectral Bands in Transition Metal Complexes." In Progress in Inorganic Chemistry. John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470166031.ch5.

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Azimbagirad, Mehran, Pardeep Vasudev, Adam Szmul, et al. "Spectral Transition Evaluation and Heatmap Extraction for Deep Learning Classifiers." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3863-5_40.

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Kornienko, N. E., A. P. Naumenko, V. O. Gubanov, L. M. Kulikov, V. E. Fedorov, and S. B. Artemkina. "Spectral Manifestations of Nonlinear Resonant Wave Interactions in the Vibrational Spectra of Transition Metal Dichalcogenides." In Springer Proceedings in Physics. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52268-1_26.

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Crepeau, John C., and L. King Isaacson. "Spectral Entropy as a Measure of Self-Organization in Transition Flows." In Self-Organization, Emerging Properties, and Learning. Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3778-6_21.

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Conference papers on the topic "Spectral transition"

1

Hu, Guyue, Minghui Shi, Xin Dong, Yi Zhou, and Kenneth K. Y. Wong. "Probing Spectral Transition of Soliton Molecules in MIR Mode-locked Fiber Laser." In CLEO: Applications and Technology. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_at.2024.jtu2a.16.

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Dissipative soliton generation in a novel MIR mode-locked laser is presented. The laser emits at 2.8 um with ~30 nm bandwidth, and the spectral transitions of soliton molecules between different states are observed.

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Guyamin Geda, Jose Maria, Yaohua Yang, Masaru Kitahara, and Tomonori Nagayama. "Efficient Augmented Extended Kalman Filter Using Adaptive Strategy with Spectral Transition for Rapid Post-Earthquake Displacement Estimation." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.0499.

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<p>The Augmented Extended Kalman Filter (AEKF) enables simultaneous estimation of structural responses and system parameters but faces significant computational challenges for large structural systems. This paper presents an efficient AEKF implementation combining adaptive Jacobian calculation with spectral Kalman filter transition for optimized computation. Validation using a three-span bridge and a 20-story frame structure under seismic excitation demonstrates that the adaptive strategy reduces processing time by 52% while maintaining displacement estimation accuracy within 1%, with sp

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Matheron, P., A. Lesage, and J. Richou. "Transition probabilities of Si." In SPECTRAL LINE SHAPES. ASCE, 1999. http://dx.doi.org/10.1063/1.58316.

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del Val, J. A., J. A. Aparicio, and S. Mar. "Transition probability measurement in a NeI plasma." In SPECTRAL LINE SHAPES. ASCE, 1999. http://dx.doi.org/10.1063/1.58312.

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Sienkiewicz, J. E., G. Chambaud, and W. E. Baylis. "Potential curves and transition moments of HG-ZN." In Spectral line shapes. AIP, 1990. http://dx.doi.org/10.1063/1.39893.

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Sauvan, P. "Ultra-dense Hot Low Z Line Transition Opacity Simulations." In SPECTRAL LINE SHAPES. AIP, 2002. http://dx.doi.org/10.1063/1.1525475.

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Kyrie, N. P. "Spectral Line Profiles of the 5p-6d Transition in CIV." In SPECTRAL LINE SHAPES. AIP, 2002. http://dx.doi.org/10.1063/1.1525441.

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Snarski, Stephen R. "Measurement and Modeling of the Fluctuating Wall Pressure Field Beneath Transitional Boundary Layers." In ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/fedsm2002-31338.

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Measurements of the fluctuating wall pressure field across the transition region of a flat plate zero pressure gradient boundary layer have been performed with a 64-element linear array of sub-miniature hearing-aid microphones. The measurements provide a unique description of the formation, convection, and growth of turbulent spots in the transition zone and insight into a potential source of low-wavenumber energy. A model for the nonhomogeneous wavenumber-frequency spectrum has been formulated based on the observed spatio-temporal properties of the field. Measured array-averaged wavenumber-fr

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Dykman, M. I., R. Mannella, P. V. E. McClintock, and N. G. Stocks. "Super-Narrow Spectral Peaks: New Critical Phenomena in Optically Bistable Systems." In Nonlinear Dynamics in Optical Systems. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/nldos.1990.ob266.

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Fluctuation-induced transitions between coexisting attractors in a periodically driven nonlinear system have been investigated theoretically and with an analogue electronic circuit model. Calculations and measurements of power spectral densities of fluctuations have revealed superimposed twin-peaked partial spectra and a super-narrow spectral peak whose intensity depends critically on the distance from the phase transition.

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Riesen, Hans, and Elmars Krausz. "Hole Burning in the Organic Triplet State: Side Holes in an Amorphous Glass." In Persistent Spectral Hole Burning: Science and Applications. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/pshb.1991.the3.

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Hole-burning spectroscopy has been widely applied to the S0-S1 transition of organic molecules in amorphous hosts [1-3]. However, only very few reports on the hole-burning spectroscopy of the triplet state have appeared [4,5]. The low oscillator strength of the S0-T1 transition is the obvious handicap in performing such experiments. The oscillator strength of the S0-T1 transition can be dramatically increased by the heavy atom effect [6] making hole-burning experiments in the S0-T1 transition more feasible. A very pronounced heavy atom effect can be expected in ligand-centred singlet -triplet

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Reports on the topic "Spectral transition"

1

Aliberti, G., G. Palmiotti, T. A. Taiwo, and J. Tommasi. Impact of spectral transition zone in reference ENIGMA configuration. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/861622.

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Asenath-Smith, Emily, Emma Ambrogi, Lee Moores, Stephen Newman, and Jonathon Brame. Leveraging chemical actinometry and optical radiometry to reduce uncertainty in photochemical research. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/42080.

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Subtle aspects of illumination sources and their characterization methods can introduce significant uncertainty into the data gathered from light-activated experiments, limiting their reproducibility and technology transition. Degradation kinetics of methyl orange (MO) and carbamazepine (CM) under illumination with TiO₂ were used as a case study for investigating the role of incident photon flux on photocatalytic degradation rates. Valerophenone and ferrioxalate actinometry were paired with optical radiometry in three different illumination systems: xenon arc (XE), tungsten halogen (W-H), and

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Knickelbein, M. B. Particle-like absorption spectra in small transition metal clusters. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/10120654.

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Pasupuleti, Murali Krishna. Phase Transitions in High-Dimensional Learning: Understanding the Scaling Limits of Efficient Algorithms. National Education Services, 2025. https://doi.org/10.62311/nesx/rr1125.

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Abstract: High-dimensional learning models exhibit phase transitions, where small changes in model complexity, data size, or optimization dynamics lead to abrupt shifts in generalization, efficiency, and computational feasibility. Understanding these transitions is crucial for scaling modern machine learning algorithms and identifying critical thresholds in optimization and generalization performance. This research explores the role of high-dimensional probability, random matrix theory, and statistical physics in analyzing phase transitions in neural networks, kernel methods, and convex vs. no

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Hairgrove, Jr, and Thomas B. Transitions in Full Spectrum Operations: The Effects of Ethos. Defense Technical Information Center, 2007. http://dx.doi.org/10.21236/ada470660.

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Zerner, Michael C. Intermediate Neglect of Differential Overlap Calculations on the Electronic Spectra of Transition Metal Complexes. Defense Technical Information Center, 1995. http://dx.doi.org/10.21236/ada306688.

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Beiersdorfer, P., T. Phillips, V. L. Jacobs, et al. High-resolution measurements, line identification, and spectral modeling of K[alpha] transitions in Fe XVIII-XXV. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/6879882.

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Beiersdorfer, P., T. Phillips, V. L. Jacobs, et al. High-resolution measurements, line identification, and spectral modeling of K{alpha} transitions in Fe XVIII-XXV. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/10117279.

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Pokrzywinski, Kaytee, Cliff Morgan, Scott Bourne, Molly Reif, Kenneth Matheson, and Shea Hammond. A novel laboratory method for the detection and identification of cyanobacteria using hyperspectral imaging : hyperspectral imaging for cyanobacteria detection. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/40966.

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To assist US Army Corps of Engineers resource managers in monitoring for cyanobacteria bloom events, a laboratory method using hyperspectral imaging has been developed. This method enables the rapid detection of cyanobacteria in large volumes and has the potential to be transitioned to aerial platforms for field deployment. Prior to field data collection, validation of the technology in the laboratory using monocultures was needed. This report describes the development of the detection method using hyperspectral imaging and the stability/reliability of these signatures for identification purpo

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Asenath-Smith, Emily, Emma Ambrogi, Eftihia Barnes, and Jonathon Brame. CuO enhances the photocatalytic activity of Fe₂O₃ through synergistic reactive oxygen species interactions. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/42131.

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Iron oxide (α-Fe₂O₃, hematite) colloids were synthesized under hydrothermal conditions and investigated as catalysts for the photodegradation of an organic dye under broad-spectrum illumination. To enhance photocatalytic performance, Fe₂O₃ was combined with other transition-metal oxide (TMO) colloids (e.g., CuO and ZnO), which are sensitive to different regions of the solar spectrum (far visible and ultraviolet, respectively), using a ternary blending approach for compositional mixtures. For a variety of ZnO/Fe₂O₃/CuO mole ratios, the pseudo-first-order rate constant for methyl orange degradat

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