Underwater acoustic monitoring of regulatory fish criteria within a high flow environment

2017 ◽  
Vol 141 (5) ◽  
pp. 4049-4049
Author(s):  
Kristjan Varnik ◽  
Erik J. Kalapinski
Keyword(s):  
Acoustic Monitoring ◽  
High Flow ◽  
Underwater Acoustic ◽  
Flow Environment

scholarly journals Autonomous Deployment of Underwater Acoustic Monitoring Devices Using an Unmanned Aerial Vehicle: The Flying Hydrophone

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6064
Author(s):  
Daniel Babatunde ◽  
Simon Pomeroy ◽  
Paul Lepper ◽  
Ben Clark ◽  
Rebecca Walker
Keyword(s):  
Autonomous Navigation ◽  
Marine Mammals ◽  
Fourier Transforms ◽  
Low Cost ◽  
Acoustic Monitoring ◽  
Automatic Data ◽  
Underwater Acoustic ◽  
Planning And Control ◽  
The United Kingdom ◽  
And Control

Unmanned aerial vehicles (UAV) are increasingly becoming a popular tool in the observation and study of marine mammals. However, the potential capabilities of these vehicles regarding autonomous operations are not being fully exploited for passive underwater acoustic monitoring in marine mammal research. This article presents results from the development of a UAV system equipped with an underwater acoustic recorder aimed at assisting with the monitoring of harbour porpoises in Special Areas of Conservation in the United Kingdom. The UAV is capable of autonomous navigation, persistent landing, take-off and automatic data acquisition at specified waypoints. The system architecture that enables autonomous UAV flight including waypoint planning and control is described. A bespoke lightweight underwater acoustic recorder (named the PorpDAQ) capable of transmitting the results of fast Fourier transforms (FFT) applied to incoming signals from a hydrophone was also designed. The system’s operation is successfully validated with a combination of outdoor experiments and indoor simulations demonstrating different UAVs capable of autonomously navigating and landing at specific waypoints while recording data in an indoor tank. Results from the recorder suggest that lightweight, relatively low-cost systems can be used in place of heavier more expensive alternatives.

scholarly journals Influence Analysis and Vibration Restraint Solutions Research on the Underwater Acoustic Monitoring System

2020 ◽  
Vol 34 (5) ◽  
pp. 718-729
Author(s):  
Zhen Wang ◽  
Yi Zheng ◽  
Yu-feng Mao ◽  
Chuan-lin He ◽  
Jin-long Gong ◽  
...  
Keyword(s):  
Monitoring System ◽  
Acoustic Monitoring ◽  
Influence Analysis ◽  
Underwater Acoustic

A real-time stream storage and analysis platform for underwater acoustic monitoring

2013 ◽  
Vol 57 (3/4) ◽  
pp. 15:1-15:10 ◽  
Author(s):  
J. P. Hayes ◽  
H. R. Kolar ◽  
A. Akhriev ◽  
M. G. Barry ◽  
M. E. Purcell ◽  
...  
Keyword(s):  
Real Time ◽  
Acoustic Monitoring ◽  
Underwater Acoustic ◽  
Analysis Platform

Endovascular obliteration of a ruptured posterior spinal artery pseudoaneurysm

2012 ◽  
Vol 17 (4) ◽  
pp. 334-336 ◽  
Author(s):  
Omar Tanweer ◽  
Rona Woldenberg ◽  
Sarah Zwany ◽  
Avi Setton
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Endovascular Repair ◽  
High Flow ◽  
Artery Pseudoaneurysm ◽  
First Report ◽  
Flow Environment ◽  
Posterior Spinal Artery

Aneurysms of the posterior spinal artery (PSA) are rare lesions. Isolated PSA aneurysms, not in the setting of a high-flow environment, are even more rare. In the few reported cases, these lesions have been predominantly resected or observed. The authors report an isolated pseudoaneurysm of the PSA at the T-11 level presenting with subarachnoid hemorrhage. The patient underwent successful endovascular obliteration. To the authors' knowledge, this is the first report of an endovascular repair of an isolated PSA aneurysm.

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