Results 31 to 40 of about 1,191,176 (295)
Time Dilation from Spectral Feature Age Measurements of Type Ia Supernovae [PDF]
, 1997 We have developed a quantitative, empirical method for estimating the age of Type Ia supernovae (SNe Ia) from a single spectral epoch. The technique examines the goodness of fit of spectral features as a function of the temporal evolution of a large ...
Challis, P. +13 more
core +2 more sources
Seismic ground motion variations resulting from site conditions
Geodesy and Geodynamics, 2014 Amplification of seismic ground motions in the territory of Almaty city is evaluated by using different methods. The pattern and probable causes of ground motion variations in different engineering-geological conditions are characterized.
N. Silacheva +2 more
doaj +1 more source
Remote Sensing, 2022 Leaf pigments are sensitive to various stress conditions and senescent stages. Variation in the ratio of chlorophyll to carotenoid content provides valuable insights into the understanding of the physiological and phenological status of plants in ...
Guangman Song, Quan Wang
doaj +1 more source
Spectral variability of the particulate backscattering ratio
Optics Express, 2007 The spectral dependency of the particulate backscattering ratio is relevant in the fields of ocean color inversion, light field modeling, and inferring particle properties from optical measurements. Aside from theoretical predictions for spherical, homogeneous particles, we have very limited knowledge of the actual in situ spectral variability of the ...
Whitmire, A. L. +3 more
openaire +3 more sources
Spectral Density Ratio Models for Multivariate Extremes [PDF]
Journal of the American Statistical Association, 2014 The modeling of multivariate extremes has received increasing recent attention because of its importance in risk assessment. In classical statistics of extremes, the joint distribution of two or more extremes has a nonparametric form, subject to moment constraints.
de Carvalho, Miguel, Davison, Anthony C.
openaire +3 more sources
Precision Measurement of the Radiative $\Beta$ Decay of the Free Neutron [PDF]
, 2016 The standard model predicts that, in addition to a proton, an electron, and an antineutrino, a continuous spectrum of photons is emitted in the $\beta$ decay of the free neutron. We report on the RDK II experiment which measured the photon spectrum using
A. K. Thompson +18 more
core +4 more sources
Clutter Mitigation Based on Spectral Depolarization Ratio for Dual-Polarization Weather Radars
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 In this article, a spectral polarimetric filter named moving spectral depolarization ratio (MsDR) filter is proposed to mitigate the effects of clutter and noise for dual-polarization weather radar without cross-polar measurements. The filter is based on
Jiapeng Yin +3 more
doaj +1 more source
Observational constraint on the fourth derivative of the inflaton potential [PDF]
, 2002 We consider the flow-equations for the 3 slow-roll parameters n_S (scalar spectral index), r (tensor to scalar ratio), and dn_S/dlnk (running of the spectral index).
C. Caprini +3 more
core +3 more sources
Layering contrasting photoselective filters improves the simulation of foliar shade
Plant Methods, 2022 Background Neutral density shade cloth is commonly used for simulating foliar shade, in which it reduces light intensity without altering spectral quality.
Dominic P. Petrella +2 more
doaj +1 more source
, 2015 In this paper, we show the evaluation of the spectral radius for node degree as the basis to analyze the variation in the node degrees during the evolution of scale-free networks and small-world networks.
Meghanathan, Natarajan
core +1 more source