Results 91 to 100 of about 489,396 (385)

The Fractal Calculus for Fractal Materials

open access: yesFractal and Fractional, 2019
The major problem in the process of mixing fluids (for instance liquid-liquid mixers) is turbulence, which is the outcome of the function of the equipment (engine). Fractal mixing is an alternative method that has symmetry and is predictable.
Fakhri Khajvand Jafari   +2 more
doaj   +1 more source

Review of Fractal and Fractal Derivatives in relation to the Physics of Fractals

open access: yes, 2013
Fractional and fractal derivatives are both generalizations of the usual derivatives that consider derivatives of non-integer orders. Interest in these generalizations has been triggered by a resurgence of clamor to develop a mathematical tool to describe “roughness” in the spirit of Mandelbrot’s (1967) Fractal Geometry. Fractional derivatives take the
Maglasang, Gibson T.   +3 more
openaire   +1 more source

High Energy Density Asymmetric Aqueous Supercapacitor Based on a 2D Manganese Carbide as a Positive Electrode

open access: yesAdvanced Functional Materials, EarlyView.
A circular route, involving upcycling of waste surgical masks, affords a Mn‐based layered carbide with porosity, redox activity and low work function. These features enable its effective operation as positive supercapacitor electrode in an aqueous asymmetric supercapacitor delivering 213 Wh L−1 energy density.
Debabrata Nandi   +7 more
wiley   +1 more source

Fractal structures of normal and anomalous diffusion in nonlinear nonhyperbolic dynamical systems

open access: yes, 2002
A paradigmatic nonhyperbolic dynamical system exhibiting deterministic diffusion is the smooth nonlinear climbing sine map. We find that this map generates fractal hierarchies of normal and anomalous diffusive regions as functions of the control ...
Klages, R., Korabel, N.
core   +1 more source

Smart Catheters for Diagnosis, Monitoring, and Therapy

open access: yesAdvanced Healthcare Materials, EarlyView.
This study presents a comprehensive review of smart catheters, an emerging class of medical devices that integrate embedded sensors, robotics, and communication systems, offering increased functionality and complexity to enable real‐time health monitoring, diagnostics, and treatment. Abstract This review explores smart catheters as an emerging class of
Azra Yaprak Tarman   +12 more
wiley   +1 more source

Fractal universe and cosmic acceleration in a Lema\^itre-Tolman-Bondi scenario

open access: yes, 2018
In this paper we attempt to answer to the question: can cosmic acceleration of the Universe have a fractal solution? We give an exact solution of a Lema\^itre-Tolman-Bondi (LTB) Universe based on the assumption that such a smooth metric is able to ...
Cosmai, Leonardo   +4 more
core   +1 more source

Partially-covered fractal induced turbulence on fins thermal dissipation [PDF]

open access: gold, 2022
Soon Hong Chew   +3 more
openalex   +1 more source

Beyond Conventional Cooling: Advanced Micro/Nanostructures for Managing Extreme Heat Flux

open access: yesAdvanced Materials, EarlyView.
This review examines the design, application, and manufacturing of biomimetic or engineered micro/nanostructures for managing high heat‐flux in multi‐level electronics by enhancing conductive, convective, phase‐changing, and radiative heat transfer mechanisms, highlighting their potential for efficient, targeted thermal management, and future prospects.
Yuankun Zhang   +7 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

Stochastic Weighted Fractal Networks [PDF]

open access: yes, 2010
In this paper we introduce new models of complex weighted networks sharing several properties with fractal sets: the deterministic non-homogeneous weighted fractal networks and the stochastic weighted fractal networks.
Carletti, Timoteo
core   +1 more source

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