Results 81 to 90 of about 1,121,618 (292)
Delay-Modulated RF Tag System Concept Using Ultrawideband Noise Radar Waveforms
International Journal of Distributed Sensor Networks, 2011 Radio frequency (RF) tags have been widely used in inventory tracking, environmental monitoring, battlefield situational awareness, and combat identification due to their low cost, small size, and wireless functionality.
Qihe Pan, Ram M. Narayanan
doaj +1 more source
Advanced Materials, EarlyView.Coupled materials design enables a monolithic fiber that integrates complementary sensing regimes into a single wearable strand. By preserving informative signal features across subtle physiological deformation, large body motion, and mixed mechanical inputs, the dual‐gradient architecture generates synchronized, less redundant outputs that improve ...
Yunheum Lee +13 more
wiley +1 more source
Snapping shrimp noise in the Korean coast of the Yellow Sea
, 2003 Snapping shrimp noise was measured for 30 minutes at 3-hour interval throughout 18 hours from 13 o’clock, August 29 to 7 o’clock, August 30, 2002 at a site of 25 m water depth in the Korean coast of the Yellow Sea.
김병남 +4 more
core
Through-The-Wall Detection Using Ultra Wide Band Frequency Modulated Interrupted Continuous Wave Signals [PDF]
, 2013 Through-The-Wall-Detection (TTWD) techniques can improve the situational awareness of police and soldiers, and support first responders in search and rescue operations.
FIORANELLI, FRANCESCO
core
Scientific ReportsQuickly identifying and classifying lightning waveforms is the foundation of lightning forecasting and early warning. In this paper, based on the electric field observation of the Beijing lightning location website of the Institute of Atmospheric Physics,
Caixia Wang +5 more
doaj +1 more source
Stochastic multi-channel lock-in detection
New Journal of Physics, 2014 High-precision measurements benefit from lock-in detection of small signals. Here we discuss the extension of lock-in detection to many channels, using mutually orthogonal modulation waveforms, and show how the choice of waveforms affects the information
J J Hudson +3 more
doaj +1 more source
The 'median' method for the reduction of noise and trigger jitter on waveform data
Journal of Research of the National Institute of Standards and Technology, 2005 The "median" method for the reduction of the effect of noise and trigger jitter on waveform data is described. The effectiveness of this method was examined using simulations and experiments and, for typical jitter and noise observed in electrical pulse metrology, is shown to provide reconstructed waveforms with transition durations that accurately ...
Paulter, N. G., Larson, D. R.
openaire +2 more sources
Controlling Radiative Phonons in the van der Waals Ferroelectric NbOI2
Advanced Materials, EarlyView.Using a simple mirror geometry, this work demonstrates local‐density‐of‐optical‐states control of THz phonon emission in van der Waals ferroelectric NbOI2. By engineering the photonic environment, the phonon Q‐factor, linewidth, peak frequency, and emission intensity are reversibly tuned by over an order of magnitude, revealing radiative phonons as ...
Baolong Zhang +5 more
wiley +1 more source
A note on least squares fitting of signal waveforms [PDF]
Signal waveforms are very fast dampening oscillatory time series composed of exponential functions. The regular least squares fitting techniques are often unstable when used to fit exponential functions to such signal waveforms since such functions are ...
Mishra, SK
core
Advanced Materials, EarlyView.We present SCIENCE, an in‐ear multimodal physiological monitor featuring two key innovations. Water‐triggered morphological expansion (a 2‐mm cylinder to a 9‐mm spindle) achieves conformal adaptation across complex canal geometries. Simultaneously, active biofouling mitigation disrupts cerumen barriers, reducing sensor‐skin impedance by 20%.
Shuyun Zhuo +3 more
wiley +1 more source