Results 101 to 110 of about 241,236 (258)

Unveiling New Perspectives on the Hirota–Maccari System With Multiplicative White Noise

open access: yesMathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT In this study, we delve into the stochastic Hirota–Maccari system, which is subjected to multiplicative noise according to the Itô sense. The stochastic Hirota–Maccari system is significant for its ability to accurately model how stochastic affects nonlinear wave propagation, providing valuable insights into complex systems like fluid dynamics
Mohamed E. M. Alngar   +3 more
wiley   +1 more source

The sculpture Manifold: a band from a surface, a surface from a band [PDF]

open access: yes, 2008
The steel sculpture Manifold consists of an 8 cm wide closed band of stainless steel that winds around in an intricate way, curving and coming very close to itself.
Osinga, HM   +2 more
core  

Sphere Theorems for σk-Einstein Manifolds

open access: yesAxioms
A problem that geometers have always been concerned with is when a closed manifold is isometric to a round sphere. A classical result shows that a closed locally conformally flat Einstein manifold is always isometric to a quotient of a round sphere.
Jingyang Zhong, Xinran Mu
doaj   +1 more source

Imaging Ionic Displacements Across Inclined Ferroelectric Domains by a Reciprocity Approach to 4D‐STEM

open access: yesSmall, EarlyView.
Four‐dimensional STEM comprises a vast portfolio of electron microscopy methods in one data set, conventional plane‐wave illumination TEM being one of them. Here, the principle of reciprocity is employed to produce true structural projections of misoriented ferroelectric domains at atomic resolution. By reciprocal TEM imaging from four‐dimensional STEM
Jean Felix Dushimineza   +4 more
wiley   +1 more source

Meningoencefalite associada ao Mycoplasma pneumoniae [PDF]

open access: yes, 2012
We report a case of a child with meningoencephalitis of atypical etiology. The patient developed the disease after an infection in the upper airways with unfavorable evolution.
Toma, Ricardo Katsuya [UNIFESP]   +5 more
core   +1 more source

Homogeneous Einstein manifolds

open access: yesRevista de la Unión Matemática Argentina, 2023
A Riemannian manifold is said to be Einstein if it has constant Ricci curvature, i.e., if its metric \(g\) satisfies Ric\(_g=cg\). When working in a homogeneous space, this condition turns into a collection of algebraic equations. Despite this apparent simplicity, the study of homogeneous Einstein manifolds turns out to be very involved and is, up to ...
openaire   +1 more source

Simulation‐Guided Tracer Optimization for Magnetic Particle Spectroscopy: Interplay of Core, Shell and Anisotropy Across Physiological‐Range Viscosities for Single‐ and Dual‐Frequency Excitation

open access: yesSmall, EarlyView.
Single‐frequency magnetic particle spectroscopy (MPS) and frequency‐mixing (FM‐)MPS exhibit complementary viscosity‐dependent signal responses of magnetic nanoparticles (MNP). MPS differentiates predominantly blood‐associated viscosities, whereas FM‐MPS shows pronounced discriminability in cellular and tissue‐like viscosity regimes (sensitivity windows)
Mohamad Bilal Abbas   +5 more
wiley   +1 more source

Manifold signal processing for MIMO communications [PDF]

open access: yes, 2009
textThe coding and feedback inaccuracies of the channel state information (CSI) in limited feedback multiple-input multiple-output (MIMO) wireless systems can severely impact the achievable data rate and reliability. The CSI is mathematically represented
Inoue, Takao, doctor of electrical and computer engineering
core  

Plant‐derived nanovesicles as potential drug delivery systems for topical use: Emerging applications in dermatology and cosmetology

open access: yesVIEW, EarlyView.
Plant‐derived nanovesicles (PDNVs) are naturally secreted by fruit, vegetables, seeds, leaves and other natural sources. Used as drug delivery systems, they can combine intrinsic therapeutic activity, enhanced skin permeation and cargo‐carrying capacity, suitable for dermatological and cosmetic applications including hydration, antioxidant/anti ...
Dorotea Fiore   +5 more
wiley   +1 more source

Directional Peer Effects in Technology Adoption: Influence of Farmer Interactions in Sustaining Rice Production in Thailand

open access: yesJournal of Agricultural Economics, EarlyView.
ABSTRACT This study examines whether Sustainable Rice Platform (SRP) practices in Thailand are driven by directional social peer exposure and physical proximity. Analysing survey data from 1363 rice‐producing households across Thailand's Central and Northeastern regions, we construct a directed social network based on self‐reported information ...
Boyeong Park   +3 more
wiley   +1 more source

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