Results 31 to 40 of about 3,733,318 (295)

The behaviour of free-flowing granular intruders

open access: yesEPJ Web of Conferences, 2017
Particle shape affects both the quasi-static and dynamic behaviour of granular media. There has been significant research devoted to the flowability of systems of irregularly shaped particles, as well as the flow of grains around fixed intruders, however
Wyburn Edward   +3 more
doaj   +1 more source

Calibration of PurpleAir PA-I and PA-II Monitors Using Daily Mean PM2.5 Concentrations Measured in California, Washington, and Oregon from 2017 to 2021

open access: yesSensors, 2022
Large quantities of real-time particle data are becoming available from low-cost particle monitors. However, it is crucial to determine the quality of these measurements. The largest network of monitors in the United States is maintained by the PurpleAir
Lance Wallace   +2 more
doaj   +1 more source

Two-dimensional systems with competing interactions: microphase formation under the effect of a disordered porous matrix [PDF]

open access: yes, 2011
We have investigated the effect of a disordered porous matrix on the cluster microphase formation of a two dimensional system where particles interact via competing interactions.
Kahl, G., Schwanzer, D. F.
core   +4 more sources

Quantification of Element Mass Concentrations in Ambient Aerosols by Combination of Cascade Impactor Sampling and Mobile Total Reflection X-ray Fluorescence Spectroscopy

open access: yesAtmosphere, 2021
Quantitative chemical analysis of airborne particulate matter (PM) is vital for the understanding of health effects in indoor and outdoor environments, as well as for enforcing EU air quality regulations.
Stefan Seeger   +13 more
doaj   +1 more source

Experimental study of shear rate dependence in perpetually sheared granular matter

open access: yesEPJ Web of Conferences, 2017
We study the shear behaviour of various granular materials by conducting novel perpetual simple shear experiments over four orders of magnitude of relatively low shear rates. The newly developed experimental apparatus employed is called “3D Stadium Shear
Liu Sophie Yang   +4 more
doaj   +1 more source

In Situ TEM Crystallization of Amorphous Iron Particles

open access: yesCrystals, 2020
Even though sub-micron and nano-sized iron particles generally display single or polycrystalline structures, a growing interest has also been dedicated to the class of amorphous ones, whose absence of a crystal structure is capable of modifying their ...
Andrea Falqui   +2 more
doaj   +1 more source

Partiklar i sørsamisk

open access: yesNordlyd: Tromsø University Working Papers on Language & Linguistics, 2023
The article presents the most central particles in Southern Sami, and argues that they constitute a separate part of speech different from adverbs. Most particles usually occur in the second position of the sentence, but several particles may also occur
Trond Trosterud
doaj   +1 more source

How granular vortices can help understanding rheological and mixing properties of dense granular flows

open access: yesEPJ Web of Conferences, 2017
Dense granular flows exhibit fascinating kinematic patterns characterised by strong fluctuations in grain velocities. In this paper, we analyse these fluctuations and discuss their possible role on macroscopic properties such as effective viscosity, non ...
Rognon Pierre   +3 more
doaj   +1 more source

Noncommutative field theories with harmonic term

open access: yes, 2010
The UV-IR mixing of scalar field theory on the Moyal space is removed by the harmonic term, so that the theory is renormalizable. We will present different properties of this scalar model and its associated gauge theory, which is candidate to ...
Corfu Summer Institute on Elementary Particles and Physics - Workshop on Non Commutative Field Theory and Gravity   +1 more
core   +1 more source

The oxidation and magnetic properties of MP recording media particles [PDF]

open access: yes, 2000
MP recording media pigments have been subjected to elevated temperatures of 180(C in air at various rates of heating from room temperature. It has been found that the rate of heating of these particles determines the final oxide which the particles form.
Hutchings, J.A., O'Grady, K.
core   +1 more source

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