Results 11 to 20 of about 2,315,945 (300)

Cometary dust analogues for physics experiments [PDF]

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT The CoPhyLab (Cometary Physics Laboratory) project is designed to study the physics of comets through a series of earth-based experiments. For these experiments, a dust analogue was created with physical properties comparable to those of the non-volatile dust found on comets.
A Lethuillier, C Feller, E Kaufmann, P Becerra, N Hänni, R Diethelm, C Kreuzig, B Gundlach, J Blum, A Pommerol, G Kargl, S Laddha, K Denisova, E Kührt, H L Capelo, D Haack, X Zhang, J Knollenberg, N S Molinski, T Gilke, H Sierks, P Tiefenbacher, C Güttler, K A Otto, D Bischoff, M Schweighart, A Hagermann, N Jäggi   +27 more
openaire   +5 more sources

A physics-guided machine learning framework for enhancing dust storm visibility prediction in arid and semi-arid regions [PDF]

Scientific Reports
Dust sharply degrades visibility in arid and semi-arid regions, yet operational forecasting remains challenged by near-surface process errors in numerical weather prediction (NWP) and the poor generalization of purely data-driven models.
Chang Xu, Henggang Zhang, Kaiyue Luo, Jie Liu, Yang Shen, Hongcai Qin, Yunhao Qu, Chenhui Zhu, Zhen Han   +8 more
doaj   +2 more sources

Charged Atmospheric Aerosols from Charged Saltating Dust Aggregates

Atmosphere, 2023
Grain collisions in aeolian events, e.g., due to saltation, result in atmospheric aerosols. They may regularly be electrically charged, but individual charge balances in collisions including small grains are not easily obtained on the ground.
F. Chioma Onyeagusi, Christian Meyer, Jens Teiser, Tim Becker, Gerhard Wurm   +4 more
doaj   +1 more source

The outer dusty edge of accretion disks in active galactic nuclei

Frontiers in Astronomy and Space Sciences, 2023
Recent models for the inner structure of active galactic nuclei (AGN) aim at connecting the outer region of the accretion disk with the broad-line region and dusty torus through a radiatively accelerated, dusty outflow.
Hermine Landt
doaj   +1 more source

Analysis of gamma-emitting radionuclides in soils around high energy accelerators

Radiation Medicine and Protection, 2022
Objective: To investigate the specific activities of gamma radionuclides in the soils around high energy accelerators, and to analyze the influence of rays emitted by nuclides with characteristic peaks at similar energy points on nuclide measurement ...
Jiaying Wang, Yu Chen, Zhongjian Ma, Lu Zhang, Zhen Zhang   +4 more
doaj   +1 more source

The feasibility of using an L1 positioned dust cloud as a method of space-based geoengineering [PDF]

, 2012
In this paper a method of geoengineering is proposed involving clouds of dust placed in the vicinity of the L1 point as an alternative to the use of thin film reflectors.
Bewick, Russell, Sanchez Cuartielles, Joan-Pau, McInnes, Colin, Bewick, R., Sanchez, J.P., McInnes, C.R.   +5 more
core   +3 more sources

Influence of multi-ion on the dust grain surface potential of complex plasmas using non-Maxwellian approach

Results in Physics, 2021
Dust grain surface potential in multi-ion plasmas having two negative ions within the context of kappa-distributed dusty plasma is studied analytically and numerically.
Abdullah Khan, B.M. Alotaibi, A.A. Abid, S. Ali, Y. Al-Hadeethi, M. Ikram, Amin Esmaeili   +6 more
doaj   +1 more source

Analyzing LDEX's Current Measurements in Lunar Orbit

The Planetary Science Journal, 2023
The Lunar Dust Experiment (LDEX) on board the Lunar Atmosphere and Dust Environment Explorer mission orbited the Moon from 2014 September to 2015 April and observed a dynamic, permanently present dust cloud produced by continual meteoroid bombardment. In
Edwin Bernardoni, Mihály Horányi, Jamey R. Szalay   +2 more
doaj   +1 more source

Time-Synchronized Microwave Cavity Resonance Spectroscopy and Laser Light Extinction Measurements as a Diagnostic for Dust Particle Size and Dust Density in a Low-Pressure Radio-Frequency Driven Nanodusty Plasma

Applied Sciences, 2022
In a typical laboratory nanodusty plasma, nanometer-sized solid dust particles can be generated from the polymerization of reactive plasma species. The interplay between the plasma and the dust gives rise to behavior that is vastly different from that of
Tim Donders, Tim Staps, Job Beckers
doaj   +1 more source

On the realization of the current-driven dust ion-acoustic instability [PDF]

, 1999
The current-driven dust ion-acoustic instability in a collisional dusty plasma is studied. The effects of dust-charge variation, electron and ion capture by the dust grains, as well as various dissipative mechanisms leading to the changes of the ...
Ostrikov, K., Ishihara, O., S. V. Vladimirov, K. N. Ostrikov, O. Ishihara, M. Y. Yu, Yu, M.Y., Vladimirov, S.V.   +7 more
core   +1 more source