Results 31 to 40 of about 324,322 (267)

Influence of Vertical Fastener Stiffness on Rail Sound Power Characteristics: Numerical Study and Field Measurement

open access: yesApplied Sciences, 2020
The aim of this paper is to investigate the influence of vertical fastener stiffness on the sound power characteristics of rail rolling noise. The rail mobility is obtained by using the Timoshenko-beam track model and the spectral element method.
Xi Sheng, Ying Zhang, Xiaozhou Liu
doaj   +1 more source

The Radiative Δ(1600) → γN Decay in the Light-Cone QCD Sum Rules

open access: yesUniverse, 2021
Within the framework of the light-cone QCD sum rules method (LCSR’s), the radiative Δ(1600)→γN decay is studied. In particular, the magnetic dipole moment GM1(0) and the electric quadrupole moment GE1(0) are estimated.
Haifa I. Alrebdi, Thabit Barakat
doaj   +1 more source

Measurement of the decay rate of the radiative Ke30 decay

open access: yesPhysics Letters B, 1996
Abstract Data from the NA31 experiment at CERN have been used to measure the decay K L → π ± e ± νγ ( K e 3 γ 0 ). 1384 ± 53 events of this decay type have been observed. The decay rate relative to K e 3 0 is found to be Γ(K e3γ 0 , E γ ∗ ≥ 30 MeV , Θ e-γ ∗ ≥ 20°) Γ(K e3 0 ...
F. Leber   +31 more
openaire   +1 more source

Differential decay rate for B → πlν semileptonic decays [PDF]

open access: yesNuclear Physics B - Proceedings Supplements, 2001
Abstract We present our study on B → π l ν semileptonic decay form factors using NRQCD action for heavy quark. In the analysis, we use the form factors f 1 (υ· k π ) and f 2 (υ· k π ) defined in the context of heavy quark effective theory by Burdman et al. .
JLQCD Collaboration   +17 more
openaire   +3 more sources

Influence of Ambient Atmospheric Environments on the Mixing State and Source of Oxalate-Containing Particles at Coastal and Suburban Sites in North China

open access: yesAtmosphere, 2022
Photodegradation is a key process impacting the lifetime of oxalate in the atmosphere, but few studies investigated this process in the field due to the complex mixing and sources of oxalate. Oxalate-containing particles were measured via single-particle
Yunhui Zhao   +13 more
doaj   +1 more source

Effect of water temperature and fish biomass on environmental DNA shedding, degradation, and size distribution

open access: yesEcology and Evolution, 2019
Environmental DNA (eDNA) analysis has successfully detected organisms in various aquatic environments. However, there is little basic information on eDNA, including the eDNA shedding and degradation processes.
Toshiaki Jo   +4 more
doaj   +1 more source

Lodgepole Pine Bole Wood Density and Decay Rate 1, 11, and 22 Years After Felling in Central Montana, United States

open access: yesFrontiers in Forests and Global Change, 2021
Estimates of dead and down woody material (DWM) biomass are important for nutrient cycling, wildlife habitat assessment, fire effects and climate change science.
Duncan C. Lutes, Colin C. Hardy
doaj   +1 more source

The decay rate asymmetry of the top quark [PDF]

open access: yesPhysics Letters B, 1993
The asymmetries ${\cal A}_k \equiv [Γ(\twddec) -Γ(\tbwddec)] /[Γ(\twddec) + Γ(\tbwddec)]$ in the partial widths of the top quark decays are discussed within the Standard Model (SM), the Two-Higgs-Doublet Model (2HDM) and supersymmetric extensions of the SM (SSM).
Grzadkowski, B., Keung, W. -Y.
openaire   +2 more sources

Validation of Chlorine Decay Equation for Water Quality Analysis in Distribution Networks

open access: yesEngineering Proceedings, 2023
This article discusses the extent of the spread of contamination in water distribution networks which may enter through a pipe leak, and the decay rate of chlorine for a specified design duration. A comprehensive water quality analysis is performed using
Rehan Jamil   +2 more
doaj   +1 more source

Cu fractions in Shiraz and Pinot Noir wines during bottle aging: rates of changes and capacity for conversion

open access: yesOENO One, 2023
The Cu fraction in wine associated with Cu(II)-organic acid complexes can suppress detrimental aromas attributed to hydrogen sulfide and methanethiol. However, the long-term stability of this Cu fraction (known as Cu fraction I) during bottle aging of ...
Xinyi Zhang, Andrew C. Clark
doaj   +1 more source

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