Results 11 to 20 of about 1,143,033 (294)

Spectral curves and W-representations of matrix models

Journal of High Energy Physics, 2023
We explain how the spectral curve can be extracted from the W $$ \mathcal{W} $$ -representation of a matrix model. It emerges from the part of the W $$ \mathcal{W} $$ -operator, which is linear in time-variables.
A. Mironov, A. Morozov
doaj   +1 more source

Stellar population models at high spectral resolution [PDF]

, 2011
We present new, high-to-intermediate spectral resolution stellar population models, based on four popular libraries of empirical stellar spectra, namely Pickles, ELODIE, STELIB and MILES.
Aihara, Alonso, Alonso, Beifiori, Bessell, Blackwell, Bruzual, C. Maraston, Carney, Cassisi, Cayrel de Strobel, Cayrel de Strobel, Cenarro, Cesetti, Chaboyer, Cimatti, Coelho, Conroy, Davies, De Angeli, di Benedetto, Driver, Eisenstein, Eisenstein, Falcón-Barroso, Fitzpatrick, Fluks, Förster-Schreiber, G. Strömbäck, Girardi, Greggio, Gustafsson, Harris, Heck, Johansson, Kannappan, Katz, Korn, Kroupa, Kurucz, Lançon, Lançon, Le Borgne, Lejeune, Lejeune, Lejeune, Lyubenova, MacArthur, Maraston, Maraston, Maraston, Maraston, Maraston, Maraston, Marigo, Marín-Franch, Mermilliod, Milone, Miner, Peacock, Percival, Pickles, Pickles, Pritzl, Prugniel, Prugniel, Puzia, Renzini, Renzini, Riffel, Riffel, Riffel, Rodríguez-Merino, Saglia, Schaller, Schiavon, Schiavon, Schiavon, Silva, Surma, Sánchez-Blázquez, Thevenin, Thomas, Thomas, Thomas, Thomas, Trager, Tripicco, Vazdekis, Vazdekis, Wake, Walcher, Worthey, Worthey   +93 more
core   +2 more sources

Structure-function models of temporal, spatial, and spectral characteristics of non-invasive whole brain functional imaging

Frontiers in Neuroscience, 2022
We review recent advances in using mathematical models of the relationship between the brain structure and function that capture features of brain dynamics. We argue the need for models that can jointly capture temporal, spatial, and spectral features of
Ashish Raj, Parul Verma, Srikantan Nagarajan   +2 more
doaj   +1 more source

Ultraviolet/Optical Emission of the Ionized Gas in AGN: Diagnostics of the Ionizing Source and Gas Properties

Frontiers in Astronomy and Space Sciences, 2017
Spectroscopic studies of active galactic nuclei (AGN) are powerful means of probing the physical properties of the ionized gas within them. In particular, near future observational facilities, such as the James Webb Space Telescope (JWST), will allow ...
Anna Feltre, Anna Feltre, Stephane Charlot, Marco Mignoli, Angela Bongiorno, Francesco Calura, Jacopo Chevallard, Emma Curtis-Lake, Roberto Gilli, Adele Plat   +9 more
doaj   +1 more source

Spectral Models of Convection-Dominated Accretion Flows [PDF]

, 2000
For small values of the dimensionless viscosity parameter, namely $\alpha\lesssim 0.1$, the dynamics of non-radiating accretion flows is dominated by convection; convection strongly suppresses the accretion of matter onto the central object and ...
Eliot Quataert, Fabian A. C., Gregory H. Ball, Honma F., Igumenshchev I. V., Meyer F., Meyer F., Ramesh Narayan, Rozanska A.   +8 more
core   +4 more sources

Spectral Evolution Models for the Next Decade [PDF]

, 2009
Spectral evolution models are a widely used tool for determining the stellar content of galaxies. I provide a review of the latest developments in stellar atmosphere and evolution models, with an emphasis on massive stars.
Claus Leitherer, Gustafsson, Kroupa, Meynet, Pauldrach, Puls, Puls, Smith   +7 more
core   +1 more source

A Statistical and Spectral Model for Representing Noisy Sounds with Short-Time Sinusoids

EURASIP Journal on Advances in Signal Processing, 2005
We propose an original model for noise analysis, transformation, and synthesis: the CNSS model. Noisy sounds are represented with short-time sinusoids whose frequencies and phases are random variables.
Myriam Desainte-Catherine, Pierre Hanna   +1 more
doaj   +1 more source

Extraction of blue roofs using BRSAM and the newly created spectral index derived from WorldView-2/3 imagery

Heliyon, 2022
To extract blue roofs (BRs) from remote sensing images quickly, first, this study used WorldView-2 and WorldView-3 as the data sources and created a new BR spectral area model (BRSAM) using the polygon area difference between the spectral curves of BRs ...
Huaipeng Liu, Xiaoqing Zuo
doaj   +1 more source

Prediction of soil organic matter and clay contents by near-infrared spectroscopy - NIRS [PDF]

Ciência Rural, 2020
: Among the soil constituents, special attention is given to soil organic matter (SOM) and clay contents, since, among other aspects, they are key factors to nutrient retention and soil aggregates formation, which directly affect the crop production ...
Bruno Pedro Lazzaretti, Leandro Souza da Silva, Gerson Laerson Drescher, André Carnieletto Dotto, Darines Britzke, José Laerte Nörnberg   +5 more
doaj   +1 more source

Spectral modeling of magnetohydrodynamic turbulent flows [PDF]

Physical Review E, 2008
We present a dynamical spectral model for Large Eddy Simulation of the incompressible magnetohydrodynamic (MHD) equations based on the Eddy Damped Quasi Normal Markovian approximation. This model extends classical spectral Large Eddy Simulations for the Navier-Stokes equations to incorporate general (non Kolmogorovian) spectra as well as eddy noise. We
Baerenzung, J., Politano, Hélène, Ponty, Yannick, Pouquet, Annick   +3 more
openaire   +6 more sources