Results 111 to 120 of about 21,122 (292)

Review of Thermally Activated Twisted Coiled Polymer Actuators: A Materials Science Perspective

open access: yesAdvanced Functional Materials, EarlyView.
Thermally activated twisted and coiled polymer actuators (TCPAs) combine lightweight design, large deformation, and scalable fabrication for soft robotic and wearable applications. This review connects polymer structure, processing history, helix geometry, and thermomechanical characterization to actuator performance, highlighting current challenges in
Nadja Schenk   +3 more
wiley   +1 more source

Influence of meshing phase difference on the static load sharing characteristics of the coaxial double-output cylindrical gear split-combined-torsion transmission

open access: yesJixie chuandong
ObjectiveThe coaxial dual-output cylindrical gear split-combined-torsion transmission system has the advantages of compact structure, light weight, and strong carrying capacity, and is widely used in aviation, shipbuilding and other fields.
HAN Ning, ZHU Rupeng, CHEN Weifang
doaj  

Design, Development and Scaling Analysis of a Variable Stiffness Magnetic Torsion Spring

open access: yesInternational Journal of Advanced Robotic Systems, 2013
In this paper we report on the design, modeling, experimental testing and scaling analysis of a novel MAgnetic Variable stiffnEess spRIng-Clutch (MAVERIC) device, which may be used as the elastic element of Variable Stiffness Actuators (VSAs). The device,
Angelo Sudano   +3 more
doaj   +1 more source

Methyl N-(dimethoxyphosphoryl)carbamate

open access: yesActa Crystallographica Section E, 2013
In the title compound, CH3OC(O)NHP(O)(OCH3)2, the P atom has a slightly distorted tetrahedral configuration. The mixed imide moiety can be described as cisoid–transoid in which the two opposing dipoles (P=O and C=O) are oriented with a O=C...P=O ...
Vladimir Ovchynnikov
doaj   +1 more source

Structure‐Guided Dynamical Mechanics in Bioinspired Double Twisted Laminated Thin Films

open access: yesAdvanced Functional Materials, EarlyView.
This work explores a dynamic mechanistic study of crack propagation and puncture testing via real‐time monitoring of crack initiation, propagation, and termination through nature‐inspired single and double twisted architectures fabricated from cellulose nanocrystals.
Justin Brackenridge   +4 more
wiley   +1 more source

On the Kropholler conjecture

open access: yes, 2008
This short note, produced for the volume of conjectures produced on the occasion of Guido Mislin's retirement, describes the status of the Kropholle conjecture which may be viewed as a far reaching generalisation of Stallings' theorem on groups with more
Sageev, Michah, Niblo, Graham A.
core  

N-(2,4-Dichlorophenyl)-4-methylbenzenesulfonamide

open access: yesActa Crystallographica Section E, 2011
The molecule of the title compound, C13H11Cl2NO2S, is bent at the S atom with a C—SO2—NH—C torsion angle of −69.07 (16)°. The sulfonyl and aniline rings are rotated relative to each other by 53.0&
K. Shakuntala   +2 more
doaj   +1 more source

Wood Cellulosic Membrane With Abundant Nanochannels for Stabilizing Aqueous Zn‐Ion Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A wood‐derived cellulosic membrane separator is developed to suppress dendrite growth in aqueous zinc‐ion batteries. Its aligned nanochannels and hydroxyl‐rich surfaces enable uniform Zn2+ flux, water immobilization, and interfacial stabilization. Zn||Zn cells achieve 1920 h of cycling, Zn||Cu cells maintain 99.5% Coulombic efficiency over 1000 cycles,
Song Wei   +8 more
wiley   +1 more source

When the heart of a faithful torsion pair is a module category

open access: yesJournal of Pure and Applied Algebra, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
COLPI, RICCARDO   +2 more
openaire   +4 more sources

N,N′-Bis(3-bromo-2-hydroxybenzylidene)propane-1,3-diamine

open access: yesActa Crystallographica Section E, 2013
In the title compound, C17H16Br2N2O2, the dihedral angle between the benzene rings is 57.7 (3)°. The conformation of the central N—C—C—C—N chain is gauche-anti [torsion angles = −64.2 (4) and −167.8 ...
Xiao-Zhen Wang
doaj   +1 more source

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