Results 11 to 20 of about 9,625 (154)
A Transcriptional Map of Human Tonsil Architecture: Beyond the Sum of (Single Cell) Parts. [PDF]
Eur J ImmunolPicture‐book compartmentalization makes tonsillar tissue an ideal model to study spatial immunology. Using single‐molecule imaging (SMI) of whole‐tissue sections, we showcase many an alternative view on tissue composition and architecture that these data and concomitant analyses provide—at the level of single cells, cellular neighborhoods, and ...
Crowell HL +11 more
europepmc +2 more sources
Phase-Changing Vanadium Oxides for Electromagnetic Radiation Management. [PDF]
Small SciVanadium dioxide's reversible insulator‐to‐metal transition near room temperature enables ultrafast, broadband electromagnetic modulation from ultraviolet to radiofrequencies. With femtosecond switching speeds and cycling endurance exceeding 100 million cycles, VO2 metasurfaces achieve tuneable absorption, beam steering, and polarisation control. These
Taha M, Daeneke T, Walia S.
europepmc +2 more sources
Planar and Pyramidal Pentacoordinate Selenium Atoms. [PDF]
ChemistryPlanar (D5h) and pyramidal (C5v) dianionic clusters, SeM5X52− (M = LiK; X = FBr), showcase pentacoordinate selenium atoms stabilized by geometric confinement and electrostatic interactions with surrounding alkali and halogen atoms. Abstract A systematic computational exploration of the dianionic systems SeM5X52− (M = Li─Cs; X = F─I) was conducted to ...
Diego L +3 more
europepmc +2 more sources
Phase Operator Problem and Macroscopic Extension of Quantum Mechanics [PDF]
, 1997 To find the Hermitian phase operatorof a single-mode electromagnetic field in quantum mechanics, the Schroedinger representation is extended to a larger Hilbert space augmented by states with infinite excitation by nonstandard analysis.
Abe +38 more
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Nonstandard topological extensions: Addendum [PDF]
Bulletin of the Australian Mathematical Society, 1975 It has recently come to my attention that, independent from my investigations in [1], Professor K.D. Stroyan [2] obtains for a Tychonoff space X and a normal base β a quotient space on *X which is homeomorphic to the Wallman-Frink Hausdorff compactification w(X, β). Consequently, if X is Tychonoff, then Corollary 4.1 in [1] implies that Stroyan's space
openaire +1 more source
On Infinitesimal L_ω-smooth Functions.
Zanco Journal of Pure and Applied Sciences, 2022 The aim of this paper is to study smoothness, approximate continuity, and approximate derivative in a nonstandard manner with respect to infinitesimal parameters.
Ibrahim O. Hamad
doaj
F-Products and Nonstandard Hulls for Strongly Continuous One-parameter Semigroups of Linear Operators [PDF]
, 2004 We give an overview of the F-product construction and the corresponding nonstandard constructions for strongly continuous one-parameter semigroups of linear operators, and show that (in the case of bounded ultrapowers) both constructs are isomorphic ...
Kellner, Jakob, Ploss, Hans
core +2 more sources
Well-posedness and long-time behavior for a nonstandard viscous Cahn-Hilliard system [PDF]
, 2011 We study a diffusion model of phase field type, consisting of a system of two partial differential equations encoding the balances of microforces and microenergy; the two unknowns are the order parameter and the chemical potential.
Colli, Pierluigi +3 more
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Analysis of a time discretization scheme for a nonstandard viscous Cahn-Hilliard system [PDF]
, 2013 In this paper we propose a time discretization of a system of two parabolic equations describing diffusion-driven atom rearrangement in crystalline matter.
Colli, Pierluigi +4 more
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Compactness of powers of \omega
, 2013 We characterize exactly the compactness properties of the product of \kappa\ copies of the space \omega\ with the discrete topology. The characterization involves uniform ultrafilters, infinitary languages, and the existence of nonstandard elements in ...
Lipparini, Paolo
core +1 more source