Results 1 to 10 of about 626 (99)
The Zeldovich Number: A Universal Dimensionless Measure for the Electromagnetic Field
Physics, 2023 In this paper we extend the Zeldovich formula, which was originally derived for the free electromagnetic field and was interpreted as the number of photons. We show that our extended formula gives a universal dimensionless measure of the overall strength of electromagnetic fields: free fields and fields produced by various sources, in both the ...
Iwo Bialynicki-Birula +1 more
exaly +4 more sources
On the Number Density of Sunyaev-Zeldovich Clusters of Galaxies [PDF]
The Astrophysical Journal, 2000 If the mean properties of clusters of galaxies are well described by the entropy-driven model, the distortion induced by the cluster population on the blackbody spectrum of the Cosmic Microwave Background radiation is proportional to the total amount of intracluster gas while temperature anisotropies are dominated by the contribution of clusters of ...
Hern'andez-Monteagudo, C. +2 more
openaire +3 more sources
Premixed Combustion in Boundary Layers for Moderate Values of the Zeldovich Numbers [PDF]
Combustion Science and Technology, 1986 The classical problem of the ignition and flame generation of combustible premixed gases by a hot flat pJate is analyzed by asymptotic techniques for moderate values of the Zeldovich numbers. For temperatures of the plate smaller than the adiabatic flame temperature it was found that the corrections to the zeroth-order solution (Zeldovich approximation)
Méndez, F. +2 more
openaire +2 more sources
Measuring the Mach Number of the Universe via the Sunyaev-Zeldovich Effect [PDF]
The Astrophysical Journal, 2004 We introduce a new statistic to measure more accurately the cosmic sound speed of clusters of galaxies at different redshifts. This statistic is evaluated by cross-correlating cosmic microwave background (CMB) fluctuations caused by the Sunyaev-Zel'dovich effect from observed clusters of galaxies with their redshifts.
Atrio--Barandela, F. +2 more
openaire +2 more sources
Nonthermal Plasma–Enabled Cascade N2 Activation and Electroreduction
EcoEnergy, EarlyView.Integrating plasma‐assisted NOx synthesis with subsequent electrochemical reduction enables the sustainable synthesis of high‐value N‐containing chemicals under ambient conditions. ABSTRACT The development of sustainable nitrogen fixation technologies operating under ambient conditions is critical for reducing the energy intensity and carbon footprint ...
Shijia Li, Wei Gao, Ziyun Wang
wiley +1 more source
Energy Science &Engineering, EarlyView.CFD analysis of a diesel–CH4–H2 tri‐fuel engine shows that increasing hydrogen energy share (HES) enhances mixing and accelerates combustion, improving pressure, efficiency, and reducing CO and soot. At 60% HES, ISFC improves 26.2%, soot drops 95%, while NOx increases due to higher temperatures. ABSTRACT The global commitment to achieve net‐zero carbon
Md. Ifthaker Alam +4 more
wiley +1 more source
The Astrophysical Journal, 2000 The linear bias of the dark halos from a model under the Zeldovich approximation is derived and compared with the fitting formula of simulation results. While qualitatively similar to the Press-Schechter formula, this model gives a better description for the linear bias around the turnaround point.
openaire +1 more source
Navigating Classical and Nonclassical Realms of Nucleation and Crystallization
Small, EarlyView.Classical nucleation and growth theories have long been foundational, yet recent nonclassical concepts have challenged and refined our understanding of solid‐state genesis. This paradigm shift introduced new, often ambiguous vocabulary. Here, we clarify key concepts, correct common misconceptions, and provide a terminological field guide across systems,
Stephan E. Wolf, Peter G. Vekilov
wiley +1 more source
Developmental Medicine &Child Neurology, EarlyView.This validation study examines the final versions of the QOLIBRI‐KIDDY (self‐report) and QOLIBRI‐KIDDY‐Proxy (parent‐report) questionnaires, designed to measure health‐related quality of life in children aged 6–7 following traumatic brain injury. Both versions cover six domains, demonstrate reliable psychometric properties, and give children a voice ...
Nicole von Steinbuechel +20 more
wiley +1 more source
The Role of Lightning in Atmospheric Chemistry
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 16, 28 August 2026.Abstract Lightning has important effects on atmospheric constituents in primarily the middle and upper troposphere. We summarize the effects of lightning on atmospheric chemistry that have been published since the last major review in 2007. The estimates of NOx production by lightning (LNOx) are based on five methods: theoretical/laboratory estimates ...
Kenneth E. Pickering +2 more
wiley +1 more source