Results 121 to 130 of about 228,033 (349)

The use of multibeam sonar mapping techniques to refine population estimates of the endangered white abalone (Haliotis sorenseni) [PDF]

open access: yes, 2006
Multibeam sonar mapping techniques provide detailed benthic habitat information that can be combined with the data on species-specific habitat preferences to provide highly accurate calculations of populations in a particular area. The amount of suitable
Butler, John   +4 more
core  

Artifacts in incomplete data tomography - with applications to photoacoustic tomography and sonar

open access: yes, 2015
We develop a paradigm using microlocal analysis that allows one to characterize the visible and added singularities in a broad range of incomplete data tomography problems.
Frikel, Jürgen, Quinto, Eric Todd
core   +1 more source

Facilitating macrosystem biology with organismal‐scale airborne remote sensing: Challenges and opportunities

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Emergent ecosystem properties, such as population and trait distributions, biodiversity and energy and water fluxes, occur because of the dynamic interactions of individuals in their environment.
Sarah J. Graves   +8 more
wiley   +1 more source

Autonomous Navigation for Autonomous Underwater Vehicles Based on Information Filters and Active Sensing

open access: yesSensors, 2011
This paper addresses an autonomous navigation method for the autonomous underwater vehicle (AUV) C-Ranger applying information-filter-based simultaneous localization and mapping (SLAM), and its sea trial experiments in Tuandao Bay (Shangdong Province, P ...
Tianhong Yan   +5 more
doaj   +1 more source

Protocols for calibrating multibeam sonar [PDF]

open access: yes, 2005
Development of protocols for calibrating multibeam sonar by means of the standard-target method is documented. Particular systems used in the development work included three that provide the water-column signals, namely the SIMRAD SM2000/90- and 200-kHz ...
Baldwin, Kenneth   +6 more
core   +1 more source

STREETS AS STAGES: Traffic Enforcement and the Competition for Cultural Growth in China

open access: yesInternational Journal of Urban and Regional Research, EarlyView.
ABSTRACT In keeping with China’s desire to build soft power to parallel its economic growth, the policing of city streets has moved to the forefront as a mechanism for moral regulation and improving urban prestige. Under pressure to civilize their citizenry, many Chinese cities have become entrepreneurial cities within a type of cultural growth ...
Gregory Fayard
wiley   +1 more source

Enhancing underwater target detection: Fusion of spatio‐temporal incompletely‐aligned AIS and sonar information via DTW and multi‐head attention mechanism

open access: yesIET Radar, Sonar & Navigation
In the field of underwater target detection, the passive sonar is an important means of long‐distance target detection. The sonar detection information typically includes both surface and underwater targets, whereas it is a great challenge on effectively
Wenbo Zhao   +4 more
doaj   +1 more source

Pseudoangiomatous stromal hyperplasia: Presentation and management – a clinical perspective

open access: yesSouth African Journal of Radiology, 2018
Pseudoangiomatous stromal hyperplasia (PASH) is a benign breast condition of collagen proliferation. In this article, four cases are presented in series to illustrate the varying clinical presentations of PASH at mammography and sonography, as well as ...
Pamela Smilg
doaj   +1 more source

Addams Crater, Venus, Venus: outflow analogous with a submarine debris flow? [PDF]

open access: yes, 2005
The extraordinary outflow length and morphology of Addams crater deposits are compared with the Saharan submarine debris flow off Northwest Africa. Vapor cloud modelling and comparison of sonar data with radar images suggest a possible similar origin for
Petford, Nick, Purdie, P.
core  

Identifying Purse Seine Vessel Operations Through Machine Learning Models for Better Spatial Fishing Effort Estimates

open access: yesFish and Fisheries, EarlyView.
ABSTRACT Spatial fisheries management requires precise, spatial explicit information on species distribution and fishing impacts. In the NW Mediterranean, the distribution of small pelagic fish (SPF) stocks is currently assessed through annual acoustic surveys.
Joan Sala‐Coromina   +7 more
wiley   +1 more source

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