Results 121 to 130 of about 75,227 (355)

Underwater Acoustic simulations with a time variable acoustic propagation model [PDF]

open access: yes, 2010
The Time Variable Acoustic Propagation Model (TV-APM) was developed to simulate underwater acoustic propagation in time-variable environments. Such environment variability induces a strong Doppler channel spread, which is an important factor to test and ...
Silva, A.   +4 more
core  

Multi‐Platform Deployments of Low‐Cost Devices for Cetacean Passive Acoustic Monitoring

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Recent advances in affordable, user‐friendly devices offer new opportunities to overcome cost constraints of underwater passive acoustic monitoring (PAM) and expand acoustic data collection. In this study, we deployed low‐cost acoustic recorders and underwater cameras across a range of platforms in the Western Mediterranean, including fishing gear ...
Greta Jankauskaite   +8 more
wiley   +1 more source

Effective beam pattern of the Blainville's beaked whale (Mesoplodon densirostris) and implications for passive acoustic monitoring

open access: yes, 2013
This work was funded by two partners under the National Oceanographic Partnership Program: the Ocean Acoustics Program of the U.S. National Marine Fisheries Service, Office of Protected Resources, and the International Association of Oil and Gas ...
Johnson, Mark   +9 more
core   +1 more source

Prefix-Free Frequency Domain Equalization for Underwater Acoustic Single Carrier Transmissions

open access: yesIEEE Access, 2018
Prefixes, in forms of cyclic-prefixes or zero-padding, have often been viewed as indispensable in underwater acoustic single-carrier transmissions to avoid inter-block interference (IBI) and to formulate circular convolution.
Xingbin Tu, Aijun Song, Xiaomei Xu
doaj   +1 more source

Sentipensar [Feel‐Thinking] Cultivates Collective Scientific Sensemaking and Worldbuilding Within and Beyond Ecological Despair

open access: yesScience Education, EarlyView.
ABSTRACT Educating youth about environmental and climate justice is crucial in realizing a sustainable and flourishing future. Yet this can be challenging given the intense eco‐emotions youth experience and express while learning about these consequential realities and their implications.
Kelsie Fowler
wiley   +1 more source

Experiment Research on Underwater Acoustic Sensor Network

open access: yes, 2007
Experiment is the effective research means. In this paper, an experiment platform for underwater acoustic sensor networks(UASNs) is designed and developed, which serves as the testing and evaluating system of UASNs and is convenient, flexible and ...
Zhang HL(张华良)   +5 more
core  

Practical evaluation of differential frequency shift chirp modulation for acoustic underwater communication

open access: yes, 2023
Frequency shift chirp modulation (FSCM) is a new modulation technique utilized by the LoRa physical layer. It is widely used in radio low-power wide area networks (LPWANs).
Renner, Bernd-Christian   +1 more
core  

Types of Struggles in Disrupted Interaction: A Case of Hard‐of‐Hearing Employees

open access: yesSymbolic Interaction, EarlyView.
Everyone experiences disrupted interactions in their everyday life. However, research indicates that people with functional impairments are particularly exposed to patterns of interactional inequality at work. Despite this, little is known about the specific disrupted interactions in everyday life and the various types of interactional struggles this ...
Ida Friis Thing
wiley   +1 more source

A simulator for swarm AUVs acoustic communication networking

open access: yes, 2016
This paper presents a simulator for swarm operations designed to verify algorithms for a swarm of autonomous underwater robots (AUVs), specifically for constructing an underwater communication network with AUVs carrying acoustic communication devices ...
Li GN(李冠男)   +4 more
core  

Analysis of causation of loss of communication with marine autonomous systems: a probability tree approach [PDF]

open access: yes, 2014
The last decade has seen the eagerly anticipated introduction of marine autonomous systems as a pragmatic tool for ocean observation. However, outstanding reliability problems means that these vehicles are not yet fulfilling their true potential.
Brito, M.P., Griffiths, G., Smeed, D.A.
core   +1 more source

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