Results 101 to 110 of about 152,938 (206)

Spectral Learning of Latent-Variable PCFGs.

, 2012
We introduce a spectral learning algorithm for latent-variable PCFGs (Petrov et al., 2006). Under a separability (singular value) condition, we prove that the method provides consistent parameter estimates.
Cohen, Shay B., Stratos, Karl, Collins, Michael, Foster, Dean P., Ungar, Lyle   +4 more
openaire   +2 more sources

Physiological effects of heart rate variability biofeedback during laboratory induced congnitive stress

, 2012
Includes bibliographical references.Heart rate variability (HRV) biofeedback is effective in reducing stress as well as managing chronic disease. It facilitates easy manipulation of HRV, and, therefore, potentially provides a valuable intervention for ...
Prinsloo, Gabriell Elizabeth
core  

Multimodel climate and variability of the stratosphere

, 2011
The stratospheric climate and variability from simulations of sixteen chemistry‐climate models is evaluated. On average the polar night jet is well reproduced though its variability is less well reproduced with a large spread between models.
T. Nakamura, Garny, Hella, Morgenstern, O, J.-F. Lamarque, Osprey, Scott, H. Teyssèdre, Eyring, V, M. Dameris, Hardiman, S. C., Garny, H., S. M. Osprey, Garcia, R., Kushner, PJ, J. Perlwitz, D. Smale, D. Plummer, Haynes, P.H., Charlton-Perez, AJ, Akiyoshi, H, J. Pyle, E. Rozanov, Nakamura, T, Akiyoshi, H., Charlton-Perez, A., Morgenstern, O., Perlwitz, J, Pyle, J, Butchart, N, Haynes, PH, M. Marchand, Lamarque, J-F, Y. Yamashita, Lamarque, J. F., Braesicke, P., Brühl, C., Baumgaertner, A., Kushner, P., Dameris, Martin, Kushner, P. J., Chipperfield, M., Butchart, Neal, Chipperfield, M, Wang, L., Joeckel, P, M. Sigmond, Tian, W., Wang, L, Bekki, S, Perlwitz, J., Dameris, M, Osprey, S. M., H. Akiyoshi, R. Garcia, V. Eyring, K. Krüger, Bekki, S., Eyring, V., A. Baumgaertner, Jöckel, P., Osprey, S., et, al., Rozanov, E, P. H. Haynes, M. Michou, Yamashita, Y, Plummer, D, S. Bekki, Scinocca, J, Newman, P. A., Shepherd, T. G., Marchand, M, Krüger, Kirstin, Eyring, Veronika, Dhomse, S, Butchart, N., D. Waugh, Haynes, P. H., Rozanov, E., Pawson, S., Lamarque, J.-F., Charlton-Perez, A. J., Osprey, SM, J. Austin, Newman, PA, Smale, D., Austin, J., Michou, M., Marchand, M., Garny, H, Newman, P., Hardiman, S., Waugh, D., Cionni, Irene, Teyssedre, H, J. Scinocca, Sigmond, M, A. J. Charlton-Perez, Waugh, D, P. J. Kushner, Bruehl, C, S. C. Hardiman, Braesicke, P, Smale, Dan, Marchand, Marion, K. Shibata, H. Garny, S. Pawson, Cionni, I., Sigmond, M., T. G. Shepherd, Hardiman, SC, C. Brühl, S. Dhomse, Baumgaertner, A, P. Braesicke, P. A. Newman, Shepherd, T., Scinocca, J., Bekki, Slimane, M. Chipperfield, I. Cionni, Garcia, R, Plummer, D., Dameris, M., Morgenstern, Olaf, Pawson, S, N. Butchart, Lamarque, J., Krueger, K, Dhomse, S., Yamashita, Y., Haynes, P., Austin, J, Smale, D, Tian, W, P. Jöckel, Pyle, J., Teyssèdre, H., L. Wang, O. Morgenstern, Charlton-Perez, Andrew J., Newman, P.A., Shibata, K, Krüger, K., W. Tian, Shibata, K., Hardiman, S.C., Shepherd, TG, Michou, M, Charlton-Perez, A.J., Jöckel, Patrick, Osprey, S.M., Nakamura, T., Michou, Martine, Cionni, I   +154 more
core   +1 more source

Spectral Variability of Supergiant HD21389

, 2022
Late B- and early A-type supergiants are interesting evolved stars exhibiting photometric variability accompanied by spectral changes. Particularly interesting is a group of pulsating stars named after Deneb as α Cyg variables. Deneb-type variables are known for decades to show variability in both brightness and radial velocities. Despite this group of
Pivoňková, K., Maryeva, O. (Olga), Aret, A., Checha, V.   +3 more
openaire   +1 more source

Correlations between Total and Spectral Solar Irradiance Variations

The Astrophysical Journal
We compare short-term (seven solar rotations), wavelength-dependent temporal variations in spectral solar irradiance (SSI) with those from the total solar irradiance (TSI). Using space-based measurements, we empirically find good correlations across most
Greg Kopp, Nina-Elisabeth Nèmec, Alexander Shapiro   +2 more
doaj   +1 more source

Using novel spectral-timing techniques to probe the rapid variability of X-Ray Binaries

, 2011
X-ray spectral variability is a powerful probe of the relationship between the accretion disc and corona in accreting compact objects. In this thesis, I present the use of variability techniques to disentangle the different variable components of X-ray ...
Wilkinson, Tony
core  

A Resolution of the Variability Discrepancy Between Peak Ground Acceleration and Spectral Stress Drop

The Seismic Record
It has been recognized that the between-event variability of peak ground acceleration (PGA) is significantly smaller than the variability of the stress drop calculated from corner frequency (the spectral stress drop).
Shota Shimmoto
doaj   +1 more source

SVHAE: Spectral Variability-Aware Hybrid Autoencoder for Hyperspectral Underwater Target Detection

IEEE Access
Hyperspectral imaging (HSI) has evolved as an important tool for many applications, including remote sensing, crime investigation, target detection, disease diagnosis, and anomaly detection.
Suresh Aala, Sravan Kumar Sikhakolli, Sunil Chinnadurai, Anuj Deshpande, Karthikeyan Elumalai, Md. Abdul Latif Sarker, Hala Mostafa   +6 more
doaj   +1 more source

Physics from Time Variability of the VHE Blazar PKS 2155-304 [PDF]

, 2010
Blazars are the principal extragalactic sources of very high energy gamma-ray emission in the Universe. These objects constitute a sub-class of Active Galactic Nuclei whose emission is dominated by Doppler boosted non-thermal radiation from plasma ...
BARRES-DE-ALMEIDA, ULISSES
core  

Are Multiwavelength Variability Events in Blazars Driven by a Common Stochastic Process?

The Astrophysical Journal
We investigate the underlying stochastic processes driving the multiwavelength variability of the blazar BL Lacertae over the past two decades. Observations from Weihai Observatory over 224 nights reveal that the power spectral slopes of intra-night ...
Jingran Xu, Shaoming Hu, Xu Chen, Shifeng Huang   +3 more
doaj   +1 more source