Results 61 to 70 of about 429,162 (226)

Plasmonic toroidal metamaterials at optical frequencies

open access: yes, 2012
Toroidal dipole is created by currents flowing on a surface of a doughnut-shaped structure along its meridians first considered by Zel'dovich in 1957 [1]. Toroidal metamaterials were first theoretically proposed in 2007 [2].
Ho, You Zhe   +6 more
core   +1 more source

Organic Mixed‐Valence π‐Electron Systems—Current Status and Challenges

open access: yesAsian Journal of Organic Chemistry, Volume 15, Issue 10, October 2026.
This review discusses the progress and challenges in organic mixed‐valence π‐electron systems, focusing on trends such as the exploration of multi‐redox‐centered mixed‐valence multi‐radical states arising from the interplay between charge transfer and spin interactions and the realization of novel mixed‐valence states through the effective utilization ...
Akihiro Ito
wiley   +1 more source

Shell road map of Queensland [cartographic material].

open access: yes, 1951
Road map of Queensland south from Cairns, with extension inset. Includes indexes, and, on verso, regional maps with relief shown by hachures.; Panel title: Shell road map Queensland.; "25 M 11/51" -- Printers code.
Shell Company of Australia.
core  

An Efficient Parameter Optimization Design Method for Toroidal Air-Core Reactors Considering Support Structure Effects

open access: yesIEEE Access
Dry-type air-core reactors are widely utilized in power systems due to their advantages such as excellent linearity and simple, reliable structure. Currently, the column-type configuration is predominantly adopted.
Wei Zheng   +6 more
doaj   +1 more source

Amino‐Functionalized Mesoporous SiO2 Hollow Nano‐Doughnuts for Enhanced Gas Adsorption and Specific Foodborne Pathogen Recognition in Point‐of‐Care Detection

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Developing rapid, precise gas sensors for Listeria monocytogenes (LM) biomarker detection faces challenges due to suboptimal gas‐solid interactions. Herein, we report the rational synthesis of amino‐functionalized mesoporous SiO2 hollow nano‐doughnuts (MS‐2‐NH2‐2) via modification with (3‐aminopropyl) trimethoxysilane (AAPTMS), which enables ...
Xingyu Wang   +7 more
wiley   +1 more source

Shell road map of Queensland [cartographic material].

open access: yes, 1950
Road map of Queensland south from Cairns, with extension inset. Includes indexes, and, on verso, regional maps with relief shown by hachures.; Panel title: Shell road map Queensland.; "20 3/50" -- Printers code.
Shell Company of Australia.
core  

A Time‐Continuous Model of the 3D Ionospheric Current System and Associated Magnetic Fields in the Diurnal Variation Band

open access: yesJournal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract Ionospheric currents and their associated magnetic perturbations are difficult to predict due to the high variability of their driving mechanisms. In addition, the 3D structure of the currents is challenging to unravel due to the lack of direct observations within the current flow region, particularly in the E $E$‐layer.
P. Alken   +6 more
wiley   +1 more source

Shell road map of Tasmania [cartographic material].

open access: yes, 1949
Road map of Tasmania showing classes of road, distances, national parks, with tables "Tasmanian highways".; Also available in an electronic version via the internet at: http://nla.gov.au/nla.map-vn2040717.Shell touring guide ...
Shell Company of Australia.
core  

Shell road map of Queensland [cartographic material].

open access: yes, 1958
Road map of Queensland south from Cairns, with extension inset. Includes indexes, and, on verso, regional map with relief shown by hachures, and street maps.; Panel title: Shell road map Queensland.; "80M-11/58" -- Printers code.
Shell Company of Australia.
core  

IMPROVEMENT OF A MICRODIPOLE MODEL OF A BALL LIGHTNING AND ELECTRODYNAMIC DEVELOPMENT OF THE THEORY OF THIS PHENOMENON.

open access: yesElectrical engineering & Electromechanics, 2013
A new electrodynamic model of a ball lightning (BL) containing an internal toroidal high-temperature energy core and an external electro-neutral highly-polarized water shell is introduced.
M.I. Baranov
doaj  

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