Results 51 to 60 of about 72,624 (215)
Acoustic and magnetic communication in plants [PDF]
Plant Signaling & Behavior, 2012 Over the last two decades, important insights into our understanding of plant ecology and the communicative nature of plants have not only confirmed the existence of a wide range of communication means used by plants, but most excitingly have indicated that more modalities remain to be discovered.
Gagliano M +4 more
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STLFM Signal Based Adaptive Synchronization for Underwater Acoustic Communications
IEEE Access, 2019 In underwater acoustic communications (UAC), signal synchronization plays a key role in the performance. It is usually performed using a known preamble transmitted prior to the data. However, the underwater acoustic (UWA) channel is characterized as time-
Fei Yuan +3 more
doaj +1 more source
Vibrational and Acoustic Communication in Animals
, 2022 AbstractAn introduction to acoustic and vibrational communication in animals is presented in this chapter. Starting with the origins of communication and ritualization of vocal and vibrational signals to produce a clear message or broadcast. A summary of communication concepts is presented describing behaviors such as displays. The chapter continues by
Dunlop, Rebecca +5 more
openaire +2 more sources
Journal of Marine Science and EngineeringOptical attenuation caused by absorption and scattering in turbid water significantly degrades underwater image quality, making reliable underwater imaging a challenging problem.
Qingyu Liu +6 more
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Covert underwater acoustic communications
The Journal of the Acoustical Society of America, 2010 Low probability of detection (LPD) communications are conducted at a low received signal-to-noise ratio (SNR) to deter eavesdroppers to sense the presence of the transmitted signal. Successful detection at intended receiver heavily relies on the processing gain achieved by employing the direct-sequence spread-spectrum (DSSS) technique.
Jun Ling +4 more
openaire +2 more sources
An Approach for Diver Passive Detection Based on the Established Model of Breathing Sound Emission
Journal of Marine Science and Engineering, 2020 Diver breathing sounds can be used as a characteristic for the passive detection of divers. This work introduces an approach for detecting the presence of a diver based on diver breathing sounds signals.
Qiang Tu, Fei Yuan, Weidi Yang, En Cheng
doaj +1 more source
Detection of shaft-seal rubbing in large-scale power generation turbines with acoustic emissions. Case study. [PDF]
, 2004 Rubbing between the central rotor and the surrounding stationary components of machinery such as large-scale turbine units can escalate into severe vibration, resulting in costly damage.
Mba, David +3 more
core
The effects of acoustic misclassification on cetacean species abundance estimation
, 2013 This work was funded through the Natural Environment Research Council and SMRU Ltd.To estimate the density or abundance of a cetacean species using acoustic detection data, it is necessary to correctly identify the species that are detected.
Caillat, Marjolaine Annie +5 more
core +1 more source
A Dual-Branch Autoencoder Network for Underwater Low-Light Polarized Image Enhancement
Remote SensingUnderwater detection faces uncomfortable illumination conditions, and traditional optical images sensitive to intensity often cannot work well in these conditions.
Chang Xue +4 more
doaj +1 more source
R&D of a low-complexity OFDM acoustic communication payload for Micro-AUV in confined space
EURASIP Journal on Advances in Signal Processing, 2022 With small size, high flexibility, low cost, and deployment convenience, Micro-sized autonomous underwater vehicle (Micro-AUV) is capable of performing diverse underwater missions efficiently in confined underwater space, for the extensive purpose of ...
Weihua Jiang +4 more
doaj +1 more source