dominant contribution
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Author(s):  
Khairallah Atwi ◽  
Charles Perrie ◽  
Zezhen Cheng ◽  
Omar El Hajj ◽  
Rawad Saleh

The light-absorption properties of brown carbon (BrC) are often estimated using offline, solvent-extraction methods. However, recent studies have found evidence of insoluble species of BrC which are unaccounted for in...


2021 ◽  
Vol 923 (1) ◽  
pp. 8
Author(s):  
Charles L. Steinhardt ◽  
Christian Kragh Jespersen ◽  
Nora B. Linzer

Abstract One of the primary goals for the upcoming James Webb Space Telescope is to observe the first galaxies. Predictions for planned and proposed surveys have typically focused on average galaxy counts, assuming a random distribution of galaxies across the observed field. The first and most-massive galaxies, however, are expected to be tightly clustered, an effect known as cosmic variance. We show that cosmic variance is likely to be the dominant contribution to uncertainty for high-redshift mass and luminosity functions, and that median high-redshift and high-mass galaxy counts for planned observations lie significantly below average counts. Several different strategies are considered for improving our understanding of the first galaxies, including adding depth, area, and independent pointings. Adding independent pointings is shown to be the most efficient both for discovering the single highest-redshift galaxy and also for constraining mass and luminosity functions.


2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
M. Diehl ◽  
J. R. Gaunt ◽  
P. Plößl

Abstract At small inter-parton distances, double parton distributions receive their dominant contribution from the splitting of a single parton. We compute this mechanism at next-to-leading order in perturbation theory for all colour configurations of the observed parton pair. Rapidity divergences are handled either by using spacelike Wilson lines or by applying the δ regulator. We investigate the behaviour of the two-loop contributions in different kinematic limits, and we illustrate their impact in different channels.


2021 ◽  
Vol 16 (4) ◽  
pp. 045013
Author(s):  
Adama Bakayoko ◽  
Corinne Galy-Lacaux ◽  
Véronique Yoboué ◽  
Jonathan E Hickman ◽  
Frank Roux ◽  
...  

2021 ◽  
Vol 18 (1) ◽  
pp. 66-75
Author(s):  
M. L. Rudakov ◽  
O M. Bolshunova ◽  
D. S. Sobyanin

The paper deals with an approach to occupational risk management based on the structuring of hazardous production situations (OPS) on the example of a coal open-cut. The possibility of using weight coefficients in determining groups of hazardous factors is shown, based on which the dominant contribution of technological and subjective factors is highlighted. An example of assessment of risks and opportunities as elements of occupational safety management based on GOST R ISO 45001-2020 is demonstrated.


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