Results 21 to 30 of about 213,590 (254)

Aerosol characteristics and particle production in the upper troposphere over the Amazon Basin [PDF]

open access: yesAtmospheric Chemistry and Physics, 2018
Airborne observations over the Amazon Basin showed high aerosol particle concentrations in the upper troposphere (UT) between 8 and 15 km altitude, with number densities (normalized to standard temperature and pressure) often exceeding those in the ...
M. O. Andreae   +46 more
doaj   +1 more source

Suppression laws for multi-particle interference in Sylvester interferometers [PDF]

open access: yes, 2015
Quantum interference of correlated particles is a fundamental quantum phenomenon which carries signatures of the statistics properties of the particles, such as bunching or anti-bunching.
Crespi, Andrea
core   +2 more sources

Open string QED meson description of the X17 particle and dark matter

open access: yesJournal of High Energy Physics, 2020
As a quark and an antiquark cannot be isolated, the intrinsic motion of a composite q q ¯ $$ q\overline{q} $$ system in its lowest-energy states lies predominantly in 1+1 dimensions, as in an open string with the quark and the antiquark at its two ends ...
Cheuk-Yin Wong
doaj   +1 more source

Interaction between dielectric particles enhances the Q-factor

open access: yesAdvanced Electromagnetics, 2019
We study behavior of resonant modes with a distance between two identical dielectric cylinders and disks. We reveal two basic scenarios of evolution of resonances with the distance between the cylinders.
E. Bulgakov, K. Pichugin, A. Sadreev
doaj   +1 more source

A two-dimensional Weibel instability simulation using the non-extensive distribution function

open access: yesAIP Advances, 2020
In this paper, the analysis of Weibel instability for electron–positron plasma is carried out by applying the q non-extensive velocity distribution function.
Amin Esmaeili   +3 more
doaj   +1 more source

Flavoured axions in the tail of Bq → μ + μ − and B → γ * form factors

open access: yesJournal of High Energy Physics, 2021
We discuss how LHC di-muon data collected to study B q → μμ can be used to constrain light particles with flavour-violating couplings to b-quarks. Focussing on the case of a flavoured QCD axion, a, we compute the decay rates for B q → μμa and the SM ...
Johannes Albrecht   +3 more
doaj   +1 more source

Extended Y-system for the $AdS_5/CFT_4$ correspondence [PDF]

open access: yes, 2010
We study the analytic properties of the $AdS_5/CFT_4$ Y functions. It is shown that the TBA equations, including the dressing factor, can be obtained from the Y-system with some additional information on the square-root discontinuities across semi ...
't Hooft   +81 more
core   +2 more sources

A machine learning approach to aerosol classification for single-particle mass spectrometry [PDF]

open access: yesAtmospheric Measurement Techniques, 2018
Compositional analysis of atmospheric and laboratory aerosols is often conducted via single-particle mass spectrometry (SPMS), an in situ and real-time analytical technique that produces mass spectra on a single-particle basis.
C. D. Christopoulos   +7 more
doaj   +1 more source

Particle Swarm Optimization Combined with Q-learning of Experience Sharing Strategy [PDF]

open access: yesJisuanji kexue yu tansuo, 2022
Particle swarm optimization (PSO) has shortcomings such as easy to fall into local optimum, insufficient diversity and low precision. Recently, adopting the strategy of combining the reinforcement learning method like Q-learning to improve the PSO ...
LUO Yixuan, LIU Jianhua, HU Renyuan, ZHANG Dongyang, BU Guannan
doaj   +1 more source

Convergence of U-statistics for interacting particle systems [PDF]

open access: yes, 2009
The convergence of U-statistics has been intensively studied for estimators based on families of i.i.d. random variables and variants of them. In most cases, the independence assumption is crucial [Lee90, de99].
Del Moral, P.   +2 more
core   +6 more sources

Home - About - Disclaimer - Privacy