Results 51 to 60 of about 163,397 (237)

The Invincible (1758) site: an integrated geophysical assessment

, 1998
Chirp sub-bottom profiler and repeat sidescan sonar imaging of the Invincible wreck site (1758) in the Solent (U.K.), interpretation, and implications for management of the ...
Adams, Jonathan R., Bull, Jonathan M., Dix, Justin K., Quinn, Rory   +3 more
core   +1 more source

Autonomous Navigation in Large‐Scale Underground Environments Based on a Purely Topological Understanding of Tunnel Networks

Journal of Field Robotics, EarlyView.
ABSTRACT This work presents a non‐geometrical navigation approach based on a purely topological understanding of underground environments. By conceptualizing subterranean scenarios as a set of tunnels that intersect with each other, and taking a navigation approach based on topological instructions, we simplify the navigation problem to the sequential ...
Lorenzo Cano, Danilo Tardioli, Alejandro R. Mosteo   +2 more
wiley   +1 more source

Research on the use of aerial sonar under deep sea conditions [PDF]

Zhihui kongzhi yu fangzhen
In this paper, the use of airborne sonar under deep sea conditions is studied. The sonar detection distance model is established by using the sonar equation.
DONG Caiping, ZHENG Xiaoqing, CUI Shuangyue, ZHANG Jinhua
doaj   +1 more source

Providing the Third Dimension: High-resolution Multibeam Sonar as a Tool for Archaeological Investigations - An Example from the D-day Beaches of Normandy [PDF]

, 2003
In general, marine archaeological investigations begin in the archives, using historic maps, coast surveys, and other materials, to define submerged areas suspected to contain potentially significant historical sites.
Calder, Brian R., Malzone, C, Mayer, Larry A., Schmidt, J S   +3 more
core   +1 more source

Virtual Elastic Tether: A New Approach for Multi‐Agent Navigation in Confined Aquatic Environments

Journal of Field Robotics, EarlyView.
ABSTRACT Underwater navigation is a challenging area in the field of mobile robotics due to inherent constraints in self‐localization and communication in underwater environments. Some of these challenges can be mitigated by using collaborative multi‐agent teams.
Kanzhong Yao, Xueliang Cheng, Keir Groves, Barry Lennox, Ognjen Marjanovic, Simon Watson   +5 more
wiley   +1 more source

Sidescan Sonar Image Enchancement Using a Decomposition Based on Orthogonal Functions. Applications with Chebyshev Polynomials [PDF]

, 1991
A method is presented to remove from sidescan sonar images of the seafloor, artifacts that are clearly unrelated to the backscattering properties of the seafloor.
Cervenka, Pierre, de Moustier, Christian
core   +2 more sources

Control System for the Navigation of the Agricultural Robots: A Review

Journal of Field Robotics, EarlyView.
ABSTRACT Control systems for the navigation of autonomous agricultural robots—particularly those operating in uneven terrain and in the presence of static or dynamic obstacles—have advanced considerably in recent years. As conventional machinery evolves toward increasingly automated systems, the design of reliable navigation controllers has become ...
Edna Carolina Moriones Polanía, Hugo Rafacho Fernandes, Daniel Albiero, Angel Pontin Garcia   +3 more
wiley   +1 more source

Miniature sonar fish tag [PDF]

, 1975
Self-powered sonar device may be implanted in body of fish. It transmits signal that can be detected with portable tracking gear or by automatic detection-and-tracking system. Operating life of over 4000 hours may be expected.
Ferguson, R. L., Lovelady, R. W.
core   +1 more source

Baseline characteristics and enrichment results from the SONAR trial [PDF]

, 2018
Aim: The SONAR trial uses an enrichment design based on the individual response to the selective endothelin receptor antagonist atrasentan on efficacy (the degree of the individual response in the urinary albumin‐to‐creatinine ratio [UACR]) and safety/
Andress, Dennis L., Bakris, George, Brennan, John J., Correa-Rotter, Ricardo, de Zeeuw, Dick, Heerspink, Hiddo J.L., Hou, Fan Fan, Kitzman, Dalane W., Kohan, Donald, Makino, Hirofumi, McMurray, John, Parving, Hans-Henrik, Perkovic, Vlado, Tobe, Sheldon, Wigderson, Melissa, Yi, Tingting   +15 more
core   +3 more sources

Redefining Optimal Coverage Path Planning for FLS‐Equipped AUVs With Deep Reinforcement Learning

Journal of Field Robotics, EarlyView.
ABSTRACT Autonomous Underwater Vehicles (AUVs) have emerged as indispensable tools for a variety of subsea tasks, from habitat monitoring and seabed mapping to infrastructure inspection and mine countermeasures. A fundamental challenge in this field is Coverage Path Planning (CPP), the problem of ensuring complete and efficient area coverage.
Lorenzo Cecchi, Alberto Topini, Alessandro Bucci, Alessandro Ridolfi   +3 more
wiley   +1 more source