Results 111 to 120 of about 8,782 (261)

Morphology‐Driven Electromechanical Performance of Graphene‐Based Electrofluids for Emerging Soft Electronic Systems

open access: yesAdvanced Materials Technologies, EarlyView.
Here, two types of electronic components are presented: a strain sensor and a stable resistor. Electrofluids properties are tuned to match these behaviors by selecting the type of filler. We show that the morphology of the filler together with its oxygen content are the key parameters to create electrical and mechanical networks with distinct responses.
Dominik S. Schmidt   +4 more
wiley   +1 more source

STRUCTURE AND DYNAMICS OF IRREGULAR MULTIARM STAR POLYMERS

open access: yesCondensed Matter Physics, 2002
Melt properties of highly branched star polymers consisting of a 1,2-polybutadiene core and nearly 270 arms of 1,4-polybutadiene with varying sizes have been investigated using small angle X-ray scattering (SAXS) and dynamic rheological measurements in ...
D.Vlassopoulos, T.Pakula, J.Roovers
doaj   +1 more source

The Effect of Muscle Energy Technique on Hamstring Extensibility: The Mechanism of Altered Flexibility

open access: yes, 2003
Purpose: To investigate the effectiveness of muscle energy technique in increasing passive knee extension and to explore the mechanism behind any observed change.\ud Procedure: 40 asymptomatic subjects were randomly allocated to control or experimental ...
Fryer, Gary   +2 more
core   +1 more source

Skin‐Like Tri‐Modal Sensors Based on Soft Piezoelectric and Ionic Composites

open access: yesAdvanced Materials Technologies, EarlyView.
Inspired by the multimodal perception of human skin, a soft, skin‐like tri‐modal sensor is presented. The device incorporates an ionically conductive, piezoelectric, elastic composite as its active layer, enabling independent detection of temperature, static strain, and dynamic strain within a single two‐terminal architecture.
Liren Wang   +9 more
wiley   +1 more source

Structural and viscoelastic relaxation in glyceral solutions of alcali-metal walides

open access: yesArchives of Acoustics, 2014
This paper presents the results of density, static viscosity and mechanical impedance measurements of glycerol solutions of electrolytes: LiBr, KBr, NaBr, KCl, RbCl, SeCl, NaF, LiF.
M. WACIŃSKI, R. PŁOWIEC
doaj  

Modelling of Creep and Stress Relaxation Test of a Polypropylene Microfibre by Using Fraction-Exponential Kernel

open access: yesModelling and Simulation in Engineering, 2016
A tensile test until breakage and a creep and relaxation test on a polypropylene fibre are carried out and the resulting creep and stress relaxation curves are fit by a model adopting a fraction-exponential kernel in the viscoelastic operator. The models
Andrea Sorzia
doaj   +1 more source

Fractional diffusion equation and relaxation in complex viscoelastic materials

open access: yes, 1992
A fractional equation describing relaxation phenomena in complex viscoelastic materials is derived by employing a formal analogy between linear viscoelasticity and diffusion in a disordered structure.
H. Eduardo Roman   +2 more
core   +1 more source

A Specific Methodology of Creep Compensation for piezoelectric Actuators by Open-loop control [PDF]

open access: yes, 2012
Piezoelectric actuators exhibit creep behavior in open-loop operation, which may lead to unaffordable errors in high precision static positioning systems.
Pommier-Budinger, Valérie   +2 more
core   +1 more source

Multimodal Haptic Perception Through Synergistic Nanocomposite Sensor Arrays

open access: yesAdvanced Materials Technologies, EarlyView.
Multi‐modal fingertip haptics are advanced through a bioinspired &vertical‐via' electronic skin architecture. A confined PDMS/MWCNT/NiNP nanocomposite, sitting at the percolation threshold, enables tactile, thermal, and magnetic sensing. A unique via‐density gradient and dedicated &Un‐Touch' reference nodes provide robust spatial resolution and signal ...
Amos Bardea, Fernando Patolsky
wiley   +1 more source

An improved computational strategy for vibration-proof structures equipped with nano-enhanced viscoelastic devices

open access: yes
Viscoelastic damping devices are effective in mitigating vibrations experienced by Civil Engineering structures subjected to natural actions, such as earthquakes, wind gusts or ocean waves.
Palmeri, Alessandro, Ntotsios, Evangelos
core  

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