Results 71 to 80 of about 469,729 (320)

Advancements in Bio‐Integrated Flexible Electronics for Hemodynamic Monitoring in Cardiovascular Healthcare

open access: yesAdvanced Science, EarlyView.
This review explores the cutting‐edge development of bio‐integrated flexible electronics for real‐time hemodynamic monitoring in cardiovascular healthcare. It covers key physiological indicators, innovative sensing mechanisms, and materials considerations. This paper highlights the application of both invasive and non‐invasive devices in cardiovascular
Ke Huang, Zhiqiang Ma, Bee Luan Khoo
wiley   +1 more source

Probabilistic, Fractal, and Related Techniques for Analysis of Engineering Surfaces

open access: yesFrontiers in Mechanical Engineering, 2020
In many engineering fields surface topography is of crucial importance solving problems of friction and other problems of tribology. A review of mathematical approaches for description of topography of engineering surfaces is presented.
Feodor M. Borodich   +3 more
doaj   +1 more source

Fractal Growth Phenomena

open access: yes, 1989
Foreword, B. Mandelbrot introduction fractal geometry fractal measures methods for determining fractal dimensions local growth models diffusion-limited growth growing self-affine surfaces cluster-cluster aggregation (CCA) computer simulations experiments
T. Vicsek
semanticscholar   +1 more source

Real‐Time Probing of Morphological Evolution and Recrystallization During Solvent Annealing in Blade‐Coated All‐Polymer Organic Solar Cells Using In Situ X‐Ray Scattering

open access: yesAdvanced Science, EarlyView.
In situ grazing‐incidence X‐ray scattering and in situ UV–vis spectroscopy are being used for the first time to reveal the morphological evolution of all‐polymer solar cell (APSCs) blends during solvent vapor annealing (SVA). SVA strongly influences the recrystallization and reordering behavior of APSCs blends, successfully establishing the ...
Jialiang Hao   +16 more
wiley   +1 more source

Microstructural Origin of Nonmonotonic Piezoresistivity in Polymer Nanocomposites

open access: yesAdvanced Science, EarlyView.
When polymer nanocomposites are subjected to tensile loading, the electrical resistance‐strain relationship may be nonmonotonic, hampering the use of these materials in real‐world applications. This challenge is addressed through the collaborative use of physical experimentation and computer simulations, establishing the inter‐nanotube junction ...
Ting Yui Wong   +3 more
wiley   +1 more source

Fractal sets satisfying the strong open set condition in complete metric spaces [PDF]

open access: yesOpuscula Mathematica, 2008
Let \(K\) be a Hutchinson fractal in a complete metric space \(X\), invariant under the action \(S\) of the union of a finite number of Lipschitz contractions. The Open Set Condition states that \(X\) has a non-empty subinvariant bounded open subset \(V\)
Gerald S. Goodman
doaj  

FRACTAL IMAGE FEATURE VECTORS WITH APPLICATIONS IN FRACTOGRAPHY

open access: yesImage Analysis and Stereology, 2011
The morphology of fatigue fracture surface (caused by constant cycle loading) is strictly related to crack growth rate. This relation may be expressed, among other methods, by means of fractal analysis.
Hynek Lauschmann   +3 more
doaj   +1 more source

Natural Fiber@MXene‐Engineered Chitosan Aerogels: Thermodynamic‐Transport Synergy for Solar‐Driven Hypersaline Interfacial Evaporation

open access: yesAdvanced Science, EarlyView.
The natural fiber@MXene‐engineered chitosan aerogel with hierarchically oriented channels is developed in this study. The photon‐entrapping networks cooperated with oriented channels to facilitate water transport and improve solar‐thermal/environmental energy synergy, endowing an evaporation rate up to 4.40 kg m−2 h−1 and efficient salt rejection ...
Qin Su   +11 more
wiley   +1 more source

The Impact of Vaccination Frequency on COVID-19 Public Health Outcomes: A Model-Based Analysis

open access: yesVaccines
Background: While the rapid deployment of SARS-CoV-2 vaccines had a significant impact on the ongoing COVID-19 pandemic, rapid viral immune evasion and waning neutralizing antibody titers have degraded vaccine efficacy.
Lin Yuan   +9 more
doaj   +1 more source

Superelastic Fire‐Safe Aerogel with Hierarchical Structures via Dual Templates Aided by Microbubble Engineering

open access: yesAdvanced Science, EarlyView.
Here, a dual‐template strategy (ice and bubble template) is used to prepare fire‐safe aerogels with hierarchical structures. When the foam expansion ratio exceeds the jamming transition value in the foam system, the aerogels demonstrate superelasticity and extreme shape adaptability.
Xiaoyang Yu   +5 more
wiley   +1 more source

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