Results 101 to 110 of about 4,968,542 (275)

Advanced signal processing techniques for underwater acoustic transmission using steerable transducer arrays [PDF]

The main objective of this research is to design and implement an eight-hydrophone transmitter array for generating bipolar acoustic pulses mimicking those produced by cosmogenic neutrino interaction in sea water.
Ooppakaew, Wichian
core  

One-way travel time ranging in dense underwater acoustic mobile networks

, 2022
reservedThe development of small low-cost autonomous underwater and surface vehicles has increased the need for underwater wireless communication and ranging to support swarm operation for collaborative data collection efforts.
MONTANARI, ANTONIO
core  

Multi-node processing for asymmetrical communications in underwater acoustic networks [PDF]

, 2009
Underwater acoustic communication networks have attracted attention for its applications in many areas such as mine warfare, rapid environmental assessment or search and rescue, where there is the need for conserted action of a group of observers ...
Silva, A., Jesus, S. M., Sérgio M. Jesus, Huillery, J., António Silva, Julien Huillery   +5 more
core   +1 more source

Remote Sensing for Irrigation Water Management—The State of the Art and Prospects for Near‐Future Operations

Irrigation and Drainage, EarlyView.
ABSTRACT A recent UN report describes many regions as facing ‘water bankruptcy,’ a condition in which available water resources can no longer meet existing demands. In practice, this means irrigation will likely bear the greatest burden of future water‐use reductions, a complicated and fraught decision to make given its critical role in food security ...
Wim G. M. Bastiaanssen, Chris Perry, Royce Dalby, Yasir Mohamed, Xueliang Cai, Poolad Karimi, IJsbrand de Jong, Pasquale Steduto, Marat Beksultanov, Christopher C. M. Neale, David Molden, Waqas Awan, Laarousi Mohamed, Jippe Hoogeveen, Jeff Davids, Nutchanart Sriwongsitanon, P. S. Rao, Roula Bachour, Palitha Bandara, Sophea Chhim, Richard Evans, Tom Lahad, D. Nagesh Kumar, Zakaria Adawy, Devendra Singh Bundela, Kawa Hakzi, Isaya Kisekka, Nicolas Puelma, Alejandro A. Pannunzio, Benjamin Koetz, Mukhiddin Ibragimov   +30 more
wiley   +1 more source

Underwater Multi-Channel MAC with Cognitive Acoustics for Distributed Underwater Acoustic Networks

Sensors
The advancement of underwater cognitive acoustic network (UCAN) technology aims to improve spectral efficiency and ensure coexistence with the underwater ecosystem. As the demand for short-term underwater applications operated under distributed topologies, like autonomous underwater vehicle cluster operations, continues to grow, this paper presents ...
openaire   +4 more sources

An environmental equalizer for underwater acoustic communications Tested at Hydralab III [PDF]

, 2010
It is known that small changes in source and receiver locations can cause significant changes in underwater acoustic channel impulse responses. At HYDRALAB III an underwater acoustic experiment was conducted to show that a source depth-shift causes a ...
Silva, A., Mertins, C., Ijaz, S., Jesus, S. M., Zabel, F.   +4 more
core  

Scalable Large Field‐of‐view 3D Photoacoustic Ultrasound Imaging With Digital Multiplexing for Human Extremities

Laser &Photonics Reviews, EarlyView.
A digitally multiplexed, large‐aperture photoacoustic and ultrasound imaging architecture is presented to overcome the fundamental limited‐view artifact inherent in conventional arrays. By significantly broadening the structural detection coverage, this scalable platform enables high‐fidelity 3D visualization of human extremities within a single ...
Sinyoung Park, Minsik Sung, Hyunhee Kim, Kijong Lee, Joongho Ahn, Eun‐Yeong Park, Sungsik Park, Hyung Ham Kim, Chulhong Kim   +8 more
wiley   +1 more source

A wide band underwater strong acoustic absorbing material

, 2012
To meet the demand of underwater acoustic absorbing material for wide band strong acoustic absorption, we introduced network structure into locally resonant phononic crystal and fabricated a new kind of metal-polymer composites.
Feng YF(冯亚菲), Jiang H(姜恒), Wang YR(王育人), Chen M(陈猛)   +3 more
core   +2 more sources

Research progress on underwater acoustic network MAC protocols supporting UUV

Dianxin kexue
With the expanding application of unmanned underwater vehicle (UUV) in underwater operations and target detection, underwater acoustic communication networking technologies designed to support UUV clusters have been widely investigated as a key field in ...
ZHAO Ruiqin, YANG Ruohan
doaj  

Organoid Coculture Models for Cancer Research and Immunotherapy

Med Research, EarlyView.
This review summarizes organoid coculture platforms, including submerged Matrigel culture, air–liquid interface, microfluidic/organoid‐on‐a‐chip, and 3D bioprinting, for reconstructing the tumor microenvironment to study tumor–stroma/immune crosstalk, evaluate immunotherapies, and enable drug screening.
Zhuo Yang, Huihui Yang, Guangxin Li, Guobang Liu, Zhulan Chen, Wenzhi Tian, Meiyang Huang, Xiaoling Liu, Yongsheng Zhao, Dong Chen   +9 more
wiley   +1 more source