Results 21 to 30 of about 99,552 (308)

Ultra-high energy cosmic neutrinos [PDF]

, 2000
Several cosmologically distant astrophysical sources may produce ultra-high energy cosmic neutrinos (E > 10^6 GeV) of all flavors above the atmospheric neutrino background. I study the effects of vacuum neutrino flavor mixing on this cosmic neutrino flux.
Athar, H.
core   +3 more sources

Passive Underwater Target Tracking: Conditionally Minimax Nonlinear Filtering with Bearing-Doppler Observations

Sensors, 2020
The paper presents an application of the Conditionally-Minimax Nonlinear Filtering (CMNF) algorithm to the online estimation of underwater vehicle movement given a combination of sonar and Doppler discrete-time noisy sensor observations.
Andrey Borisov, Alexey Bosov, Boris Miller, Gregory Miller   +3 more
doaj   +1 more source

Sensor Modeling for Underwater Localization Using a Particle Filter

Sensors, 2021
This paper presents a framework for processing, modeling, and fusing underwater sensor signals to provide a reliable perception for underwater localization in structured environments.
Humberto Martínez-Barberá, Pablo Bernal-Polo, David Herrero-Pérez   +2 more
doaj   +1 more source

Oceanographic and underwater acoustics research : conducted during the period 1 November 1960 - 30 April 1961 [PDF]

, 1961
Digital computing techniques have been used in special computing applications in underwater acoustics at WHOI for many years, but recently we have commenced intensive application of digital data handling and computing facilities to a variety of computing,
Woods Hole Oceanographic Institution, /
core   +1 more source

A Minimal Metric for the Characterization of Acoustic Noise Emitted by Underwater Vehicles

Sensors, 2020
Underwater robots emit sound during operations which can deteriorate the quality of acoustic data recorded by on-board sensors or disturb marine fauna during in vivo observations.
Giacomo Picardi, Clara Borrelli, Augusto Sarti, Giovanni Chimienti, Marcello Calisti   +4 more
doaj   +1 more source

Salmon behavioural response to robots in an aquaculture sea cage [PDF]

Royal Society Open Science, 2020
Animal–robot studies can inform us about animal behaviour and inspire advances in agriculture, environmental monitoring and animal health and welfare.
M. Kruusmaa, R. Gkliva, J. A. Tuhtan, A. Tuvikene, J. A. Alfredsen   +4 more
doaj   +1 more source

MITIGATING IMAGE RESIDUALS SYSTEMATIC PATTERNS IN UNDERWATER PHOTOGRAMMETRY [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Systematic errors may result from the adoption of an incomplete functional model that is not able to properly incorporate all the effects involved in the image formation process.
F. Menna, E. Nocerino, S. Ural, A. Gruen
doaj   +1 more source

Underwater Localization System Combining iUSBL with Dynamic SBL in ¡VAMOS! Trials

Sensors, 2020
Emerging opportunities in the exploration of inland water bodies, such as underwater mining of flooded open pit mines, require accurate real-time positioning of multiple underwater assets.
José Almeida, Bruno Matias, António Ferreira, Carlos Almeida, Alfredo Martins, Eduardo Silva   +5 more
doaj   +1 more source

Predicting sonic pulse shapes of underwater spark discharges [PDF]

, 1962
Measurements of the acoustic pressure of spark discharges were made at a shallow depth (10 feet) for various voltages, stored energies, inductances and capacitances of the system, and electrode areas.
Caulfield, David D.
core   +1 more source

Juveniles of the piscivorous dourado Salminus brasiliensis mimic the piraputanga Brycon hilarii as an alternative predation tactic

Neotropical Ichthyology
In the district of Bom Jardim, in Nobres, Mato Grosso State, Brazil, there are clear water streams originating on karstic terrain. The dourado, Salminus brasiliensis, is an apex stalking predator in these streams. In clear waters, where visually oriented
Eduardo Bessa, Lucélia Nobre Carvalho, José Sabino, Paola Tomazzelli   +3 more
doaj   +1 more source