Results 81 to 90 of about 1,250,916 (295)

Electrospun Wood‐Derived Biopolymers as Electrodes in Electrochemical Energy Storage Technologies

open access: yesAdvanced Functional Materials, EarlyView.
Electrospinning transforms wood‐derived cellulose and lignin into architecturally defined, binder‐free carbon electrodes with tuneable porosity and functionality. This review shows how fibre design enables decoupled charge and mass transport, enhancing performance across battery systems, while identifying key challenges in spinnability, scalability ...
Michael W. Thielke   +3 more
wiley   +1 more source

Open-ended evolution to discover analogue circuits for beyond conventional applications [PDF]

open access: yes, 2012
Analogue circuits synthesised by means of open-ended evolutionary algorithms often have unconventional designs. However, these circuits are typically highly compact, and the general nature of the evolutionary search methodology allows such designs to be ...
Kalganova, TG
core   +1 more source

Finding the Number of Spanning Trees in Specific Graph Sequences Generated by a Johnson Skeleton Graph

open access: yesMathematics
Using equivalent transformations, complicated circuits in physics that need numerous mathematical operations to analyze can be broken down into simpler equivalent circuits.
Ahmad Asiri, Salama Nagy Daoud
doaj   +1 more source

Implantable Ionic Memristors Based on Natural Polymer Heterojunctions

open access: yesAdvanced Functional Materials, EarlyView.
We report an implantable natural polymer‐based ionic memristor composed of hyaluronic acid, chitosan, and PDMS. The device achieved 98.94% accuracy in MNIST classification while reducing training time by 36.8% compared with a conventional artificial neural network (ANN).
Dong‐yup Lee   +6 more
wiley   +1 more source

Equivalent Circuits as Related to Ionic Systems [PDF]

open access: yes, 1963
The purpose of this paper is to clarify the relationship between certain “equivalent circuits” and the fundamental flux equations of Nernst and Planck. It is shown that as a direct algebraic consequence of these equations one may construct two types of ...
Alan Finkelstein   +3 more
core   +1 more source

Efficient Equivalent Circuits Approach for Millimeter Wave Metamaterial Resonators

open access: yes, 2023
This paper details the extraction of two possible equivalent circuits over a wide band for an mm-Wave Electric-LC resonator on a multilayer stack, based on a T structure or on only one shunt susceptance with two transmission lines.
Pierantoni L.   +4 more
core   +1 more source

The program of the analysis crosstalk in circuits PCB [PDF]

open access: yesTekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2008
The brief review of existing programs of the analysis of electromagnetic compatibility for circuits PCB is given. Advantages of the developed program of the analysis are shown. The description of the developed method of a reduction of equivalent circuits
Sirotко V. K.
doaj  

Strong Lead‐Free Bioinspired Piezoceramics for Durable Energy Transducers

open access: yesAdvanced Functional Materials, EarlyView.
We fabricated brick‐and‐mortar lead‐free piezoceramics with Bi0.5Na0.5TiO3 monocrystal platelets as bricks and amorphous silica as mortar. The alignment of the bricks and the presence of the amorphous silica led to anisotropic residual stresses. These residual stresses increase the samples toughness, strength and durability while the brick alignment ...
Ruxue Yang   +12 more
wiley   +1 more source

Operando Tracking of Oxygen‐Vacancy Dynamics and Negative Capacitance in Ca‐Doped BiFeO3

open access: yesAdvanced Functional Materials, EarlyView.
Operando electrochemical impedance spectroscopy, combined with electrocoloration, enables a direct correlation between real‐space ionic redistribution and the corresponding frequency‐domain electrical response. In lateral Ca‐doped BiFeO3 devices, time‐resolved impedance snapshots capture the evolution from bulk‐dominated mixed conduction to an ...
Jeonghun Suh   +3 more
wiley   +1 more source

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