Results 91 to 100 of about 4,405,798 (247)

Density in hyperbolic spaces [PDF]

open access: yes, 2002
textWe present new (and old) examples showing the difficulty of defining density for packings of hyperbolic space. Using probabilistic techniques, we develop a new method for studying density and show that it corresponds to well-founded notions in ...
Bowen Lewis, 1972-
core  

The Smarandache Curves on S12 and Its Duality on H02

open access: yesJournal of Applied Mathematics, 2014
We introduce special Smarandache curves based on Sabban frame on S12 and we investigate geodesic curvatures of Smarandache curves on de Sitter and hyperbolic spaces.
Atakan Tuğkan Yakut   +2 more
doaj   +1 more source

LEAD: Literature Enhanced Ab Initio Discovery of Nitride Dusting Layers for Enhanced Tunnel Magnetoresistance and Lower Resistance Magnetic Tunnel Junctions

open access: yesAdvanced Materials, EarlyView.
Magnetic tunnel junctions (MTJs) using MgO tunnel barriers face challenges of high resistance‐area product and low tunnel magnetoresistance (TMR). To discover alternative materials, Literature Enhanced Ab initio Discovery (LEAD) is developed. The LEAD‐predicted materials are theoretically evaluated, showing that MTJs with dusting of ScN or TiN on ...
Sabiq Islam   +6 more
wiley   +1 more source

Hyperbolic vacua in Minkowski space

open access: yesJournal of High Energy Physics
Families of Lorentz, but not Poincare, invariant vacua are constructed for a massless scalar field in 4D Minkowski space. These are generalizations of the Rindler vacuum with a larger symmetry group. Explicit expressions are given as squeezed excitations
Walker Melton   +3 more
doaj   +1 more source

Seamless Mechanical Programming Through Hybrid Epoxy–Acrylate Printing for Soft–Rigid Robots

open access: yesAdvanced Materials, EarlyView.
Hybrid epoxy‐acrylate printing enables seamless fabrication of soft–rigid robotic systems with covalently integrated interfaces and functionally graded mechanics. Grayscale exposure expands the accessible material space, enabling spatially programmed actuation through patterned stiffness while revealing the mechanics and durability of continuously ...
David C. Bershadsky   +3 more
wiley   +1 more source

Engulfing in word-hyperbolic groups

open access: yes, 2002
We examine residual properties of word-hyperbolic groups, adapting a method introduced by Darren Long to study the residual properties of Kleinian ...
G. A. Niblo   +3 more
core   +1 more source

An Engineered Thio‐Amino Polymer Achieves Potent, Safe, and Broad Cell Type Delivery in the Lung Mapped by Spatial Transcriptomics

open access: yesAdvanced Materials, EarlyView.
Synthesis and screening of a polymer library produced a versatile and inhalable mRNA vehicle for the lungs (P81). Compared to a published LNP, P81 provides increased delivery efficacy, achieving widespread expression in broad cell types, with no toxicity.
Pramodkumar EK   +36 more
wiley   +1 more source

On k -symmetries of hyperbolic spaces

open access: yesDifferential Geometry and its Applications, 2013
Abstract We determine all the possible pointwise k -symmetric spaces of negative constant curvature. In general, such spaces are not k -symmetric. In fact we show that, for all n ⩾ 3 , k ≠ 2 , H n is not k -symmetric, i.e., for any set of selected k -symmetries, one for each point of H n , the regularity ...
Costa, Simone, Pianta, Silvia
openaire   +3 more sources

Life‐Like Ferrous Oxide Microspheres from Kombucha

open access: yesAdvanced Materials Interfaces, EarlyView.
Kombucha bacterial cellulose, sodium alginate, and ferrous nitrate self‐assemble into membrane‐enclosed iron oxide microspheres. These microspheres bud daughter vesicles, sustain 24‐h electrochemical oscillations, and filter theta‐band signals.
Panagiotis Mougkogiannis   +2 more
wiley   +1 more source

Multi‐Parametric Fluorescence Spectroscopy for the Detection and Characterization of Plant‐Derived Protein Residues on 316L Stainless Steel

open access: yesAdvanced Materials Interfaces, EarlyView.
UV–vis fluorescence spectroscopy enables sensitive monitoring of plant protein adsorption on AISI 316L stainless steel under food‐processing‐relevant conditions. Spectral deconvolution reveals adsorption‐induced changes associated with protein–surface interactions and conformational alterations, demonstrating the potential of the technique for ...
Alexander Khort   +6 more
wiley   +1 more source

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