Results 91 to 100 of about 159,512 (410)

Modulating D33 Coefficients Through In Situ AgF and Ag2O Growth in PVDF Composites for High‐Performance Piezoelectric Nanogenerators

Advanced Materials Technologies, EarlyView.
In situ, nanoparticle doping enhances the piezoelectric coefficient (**d₃₃**) of PVDF to ≈12 pC/N, while in situ growth of AgF and Ag₂O dopants increases β‐phase concentration. The nanogenerator achieves a 35 V open‐circuit voltage and 1.6 µA short‐circuit current, powering 10 blue LEDs and charging a 50 nF capacitor within 10 s.
Renjun Liu, Ki Hoon Shin, Yu Zhu, Qing Liu, Bing Ji, Guoxing Sun, Zongjin Li, Dadimuni De Silva, Aisling Stewart, Matteo Lorenzoni, Ingo Ludtke, Oliver A. Williams, Wenlong Ming, Giorgio Divitini, Jung Inn Sohn, Bo Hou   +15 more
wiley   +1 more source

A Study on Post-Flutter Characteristics of a Large-Span Double-Deck Steel Truss Main Girder Suspension Bridge

Buildings
To investigate the nonlinear flutter characteristics of long-span suspension bridges under different deck ancillary structures and configurations, including those with and without a central wind-permeable zone, as well as to analyze the hysteresis ...
Chunguang Li, Minhao Zou, Kai Li, Yan Han, Hubin Yan, Chunsheng Cai   +5 more
doaj   +1 more source

Multiagent Control of Airplane Wing Stability with "Feathers" under the Flexural Torsional Flutter [PDF]

arXiv, 2021
This paper proposes a novel method for the prevention of the unbounded oscillation of an aircraft wings under the flexural torsion flutter. The paper introducing the novel multiagent method for control of an aircraft wing, assuming that the wing surface consists of controlled "feathers" (agents).
arxiv  

Ambient‐Air‐Processed, Solution‐Based Organic Photovoltaics and Photodetectors

Advanced Optical Materials, EarlyView.
This review explores ambient‐air‐processed, solution‐based organic photovoltaics (OPVs) and organic photodetectors (OPDs). It highlights advancements in photoactive materials, charge transport layers, and electrodes integrated into devices processed in ambient air via solution‐based methods, examining their performance, stability, and scalability, and ...
Bahareh Nasrollahi, Javith Mohammed Jailani, Jacob Loftus, Vincenzo Pecunia   +3 more
wiley   +1 more source

Supersonic flutter analysis of flat composite panels by unified formulation [PDF]

arXiv, 2013
In this paper, the linear flutter characteristics of laminated composite flat panels immersed in a supersonic flow is investigated using field consistent elements within the framework of unified formulation. The influence of the aerodynamic damping on the supersonic flutter characteristics of flat composite panels is also investigated.
arxiv  

Atrial Flutter in Infants

Journal of the American College of Cardiology, 2006
We sought to characterize the clinical nature of atrial flutter (AFL) in a large cohort of infants.There are no large studies describing the natural history of AFL in infants. Previous studies vary in the therapy used and expected prognosis.We reviewed the records of all children younger than 1 year of age who were diagnosed with AFL at our hospital ...
Karen M. Texter, Naomi J. Kertesz, Arnold L. Fenrich, Richard A. Friedman   +3 more
openaire   +3 more sources

High‐Performance and Ultrafast Single Germanium Nanowire Photodetectors

Advanced Optical Materials, EarlyView.
Semiconductor nanowire‐based photodetectors with high sensitivity and fast photoresponse in the near‐infrared wavelength range are crucial for applications in light‐wave communication switches, as well as environmental and atmospheric sensing. Here, the fabrication of an axial p‐n junction along single germanium nanowires and their photoresponse ...
Ahmad Echresh, Mohd Saif Shaikh, Mircea Traian Catuneanu, Himani Arora, Shengqiang Zhou, Artur Erbe, Manfred Helm, Lars Rebohle, Kambiz Jamshidi, Yonder Berencén, Yordan M. Georgiev   +10 more
wiley   +1 more source

Calculation of AGARD Wing 445.6 Flutter Using Navier-Stokes Aerodynamics [PDF]

, 1993
An unsteady, 3D, implicit upwind Euler/Navier-Stokes algorithm is here used to compute the flutter characteristics of Wing 445.6, the AGARD standard aeroelastic configuration for dynamic response, with a view to the discrepancy between Euler ...
Anderson W. K., Anderson W. K., Baldwin B., Batina J. T., Bennett R.M., Cunningham H. J., Desmarais R. N., Edwards J. W., Equations, Johnson D., Lee-Rausch E. M., Mohr R. W., Obayashi S., Rausch D., Rausch R. D., Rausch R.D., Robinson B. A., Seidel D. A., Wings, Yang T. Y., Yates E. C., Yates E. C., Jr.   +21 more
core   +3 more sources

A Portable and Low‐Cost Single Board Computer‐Based Spectrophotometric Platform for Optical Analysis in the UV and Visible Range

Advanced Sensor Research, EarlyView.
The increasing power of consumer electronics drives innovation in research. Here, a low‐cost (<€100), portable UV–vis spectrophotometric device is presented using Raspberry Pi and the AS7341 sensor. The system matches commercial spectrophotometers in performance and successfully analyzes wine samples and DNA oligonucleotides.
Alessandro Tonelli, Anna Tortone, Alessandro Grazioli, Francesco Pasquali, Michele Sozzi, Alessandro Candiani, Luca Capelli, Alessandro Bertucci   +7 more
wiley   +1 more source

Large-amplitude membrane flutter in inviscid flow [PDF]

, 2019
We study the large-amplitude flutter of membranes (of zero bending rigidity) with vortex-sheet wakes in 2D inviscid fluid flows. We apply small initial deflections and track their exponential decay or growth and subsequent large-amplitude dynamics in the space of three dimensionless parameters: membrane pretension, mass density, and stretching modulus.
arxiv   +1 more source