Results 61 to 70 of about 3,182,231 (221)

Lifestyle medicine innovations: Physical activity assessment in patient care and implementation of a digital health platform to support healthier movement

PM&R, EarlyView.
Abstract Objective To introduce the ExerciseRxTM digital health platform as a scalable approach to support personalized physical activity (PA) and home exercise as part of clinical care. Design Narrative review of Physical Activity Vital Sign (PAVS) integration within an academic healthcare system as well as description and ongoing research on a ...
Cindy Y. Lin, Theresa Kehne
wiley   +1 more source

Research on the Distance of the Active Sonar under the Effects of the Thermocline

Journal of Measurement Science and Instrumentation, 2010
The existence of thermocline changes the acoustic structure and effects the direction of the sound rays.This paper analyzes the working process of the active sonar,and the mathematical models.The detection probability of the active sonar under ...
Xian-ku ZHANG, Ji-duan LI
doaj  

Estimating the performance of the infotaxis search strategy for changing beamwidth [PDF]

JASA Express Letters
Infotaxis was compared with maximum a posteriori (MAP) search in active sensing for varying sonar beam widths on one-dimensional grids. The active sensing model incorporated missed detections and false alarms typically found in sonar.
Marvin Mboya, John R. Buck, Wu-Jung Lee
doaj   +1 more source

Design and Testing of a Minimal Configuration Underwater Micro‐Glider: Automating Lake and Reservoir Monitoring

Journal of Field Robotics, EarlyView.
ABSTRACT Uncrewed underwater vehicles (UUVs) have transformed oceanographic research through autonomous data gathering. Similarly, lake and other aquatic research can potentially be automated and transformed. However, UUVs would need to be smaller, lighter, less complex, and cheaper than currently available to make them more practical and user‐friendly
James M Rand, Alan Hunter, Danielle Wain, Lee D Bryant   +3 more
wiley   +1 more source

Research advances and development trends in acoustic target detection

Zhongguo Jianchuan Yanjiu
Underwater target detection faces severe challenges due to the enhanced acoustic stealth capabilities of targets and the anomalous sound propagation phenomena within complex ocean waveguides.
Yixin YANG, Lei XIE, Long YANG, Yong WANG, Lu WANG, Yuqi LIU   +5 more
doaj   +1 more source

FLSea: Underwater Visual–Inertial and Stereovision Forward‐Looking Data Sets

Journal of Field Robotics, EarlyView.
ABSTRACT Visibility underwater is challenging and degrades as the distance between the subject and the camera increases. That is why forward‐looking underwater computer vision tasks are difficult. We have collected underwater forward‐looking stereovision and visual–inertial image sets using two underwater imaging platforms, a stereo camera rig, and an ...
Yelena Randall, Ori Lifschitz, Tali Treibitz   +2 more
wiley   +1 more source

Coherent and Noncoherent Joint Processing of Sonar for Detection of Small Targets in Shallow Water

Sensors, 2018
A coherent-noncoherent joint processing framework is proposed for active sonar to combine diversity gain and beamforming gain for detection of a small target in shallow water environments.
Xiang Pan, Jingning Jiang, Si Li, Zhenping Ding, Chen Pan, Xianyi Gong   +5 more
doaj   +1 more source

Development of Multilayer Transducer and Omnidirectional Reflection Model for Active Reflection Control

Sensors, 2023
Underwater detection is accomplished using an underwater ultrasonic sensor, sound navigation and ranging (SONAR). Stealth to avoid detection by SONAR plays a major role in modern underwater warfare.
Beom Hoon Park, Han Bin Choi, Hee-Seon Seo, Yub Je, Hak Yi, Kwan Kyu Park   +5 more
doaj   +1 more source

Formation Control With Obstacle Avoidance of Underwater Swarms Based on Relative Visual Feedback

Journal of Field Robotics, EarlyView.
ABSTRACT Underwater multi‐robot and swarm systems require advanced methodologies for controlling collective behavior. Conventional single‐robot techniques, such as tethering, sonar imaging, and acoustic localization, are not scalable or effective for swarm applications.
Andrea Infanti, Saverio Iacoponi, Saif Alameri, Mohamed El Hanbaly, Mohammed Tarnini, Cesare Stefanini, Giulia De Masi, Federico Renda   +7 more
wiley   +1 more source

Effective Data Augmentation for Active Sonar Classification Using Attention-Based Complementary Learning With Uncertainty Measure

IEEE Access
We enhance the performance of active sonar classification by integrating a validated attention-based complementary learning model (ABCL) with an active learning (AL) framework, following modifications to adapt the model for AL.
Youngsang Hwang, Geunhwan Kim, Wooyoung Hong, Youngmin Choo   +3 more
doaj   +1 more source