Results 41 to 50 of about 5,048,488 (218)
The Rayleigh–Taylor instability of two-dimensional high-density vortices [PDF]
, 2005 We investigate the stability of variable-density two-dimensional isolated vortices in the frame of incompressible mixing under negligible gravity. The focus on a single vortex flow stands as a first step towards vortex interactions and turbulent mixing ...
Fontane, Jérôme +2 more
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, 2014 A novel kind of pycnometer was designed for liquid density measurements suitable to be used over wide ranges of temperature and pressure. Two similar pycnometers have been manufactured and tested with n-nonane 99.7mol% in the temperature range from 233K ...
Santiano M +6 more
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Electron Densities, Momentum Densities, and Density Matrices
Zeitschrift für Naturforschung A, 1993 Abstract Relationships among electron coordinate-space and momentum densities and the one-electron charge density matrix or Wigner function are examined. A knowledge of either or both densities places constraints on possible density matrices.
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Time-resolved X-ray imaging of the current filamentation instability in solid-density plasmas
Nature CommunicationsThe streaming of energetic charged particles can magnetize astrophysical and laboratory plasmas via the current filamentation instability. Despite its importance, the experimental characterization of this instability has remained a challenge.
Christopher Schoenwaelder +17 more
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Developing the NIS solid density hydrostatic weighing system up to 20 kg
International Journal of Metrology and Quality Engineering, 2020 This paper presents a developed design and construction to improve the performance and increasing the density measuring capability of the previous Hydrostatic Weighing Apparatus (HWA-NIS) at the National Institute of Standards (NIS) up to 20 kg.
Hamdy Mohamed +3 more
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Associations of residential walkability and greenness with arterial stiffness in the UK Biobank
Environment International, 2022 Background: Arterial stiffness is a key non-invasive marker of early vascular ageing, however, little is known of its associations with urban built environment.
Ka Yan Lai +4 more
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Convergence, Density, and τ-Density of Bounded Sequences [PDF]
Proceedings of the American Mathematical Society, 1963 1. Let N be the set of positive integers, let E be the Banach space of all bounded real-valued functions on N, and let E+ be its positive cone, i.e., E+= IfGE|f(n) 2O0 for all nEN}. If f-gEE+ we shall say f 2 g. If J C N, we say J has density a, or d (J) =a, if (1.1) limn (1/n)C{Jn { 1, 2, * , n} } =a.
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Proceedings of the American Mathematical Society, 1971 We prove that for any r r , “ entropy = r \operatorname {entropy} = r ” is a dense condition in the uniform topology.
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q-Density points and q-density topologies
Topology and its Applications, 2012 Let \(\lambda (.)\) denote the Lebesgue measure and \(\Omega \) the \(\sigma \) -algebra of Lebesgue measurable subsets of \(\mathbb R\). of real numbers. For \( n\geq 1\), \(x\in \mathbb R\) and \(A\in \Omega \), define the sets \(A_{n}(x)=\left[ n(A-x\right] \cap \left[ -1,1\right] \) and \(A_{n}^{\prime }(x)=\left[ -1,1 \right] \smallsetminus A_{n ...
Papachristodoulos, C. +1 more
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Density divergence and density convergence
Journal of Statistical Research, 2023 Divergence between two distributions has been of statistical interest for more than a century, beginning with Karl Pearson with his famous chisquare test. The paper revisits some of the well-known density divergence measures, and studies their interrelationship.
Malay Ghosh, Partha Sarker
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