Results 131 to 140 of about 228,033 (349)

Shallow water depth (≤5 m) estimation based on single-beam echo sounder and optical satellites

Geocarto International
This study combined single-beam echo sounder data with PlanetScope multispectral data to invert shallow water depth (≤5 m) around Weizhou Island, analyzing how each band's reflectance varies with depth by establishing their quantitative relationship and ...
Jianqu Chen, Zhenxiong Yang, Kai Wang, Xunmeng Li, Xu Zhao, Zhangbin Liu, Jian Zhang, Huarong Yuan, Pimao Chen, Shouyu Zhang   +9 more
doaj   +1 more source

A Real-Time Novelty Detector for a Mobile Robot

, 2000
Recognising new or unusual features of an environment is an ability which is potentially very useful to a robot. This paper demonstrates an algorithm which achieves this task by learning an internal representation of `normality' from sonar scans taken as
Marsland, Stephen, Nehmzow, Ulrich, Shapiro, Jonathan   +2 more
core   +1 more source

System locates randomly placed remote objects [PDF]

, 1966
System to locate objects submerged underwater uses active/passive sonar techniques in which a transmitter is attached to the object to be recovered and a receiver is used for search.
Lovelady, R. W., Mc Fall, J. C., Jr.
core   +1 more source

Local Angler Knowledge Reveals Declines in Fishing Quality for Black Bass in Lakes of Eastern Ontario

Fisheries Management and Ecology, EarlyView.
ABSTRACT Local ecological knowledge can be useful to assess data‐limited fisheries such as the Ontario Black Bass (Micropterus spp.) recreational fishery. We surveyed local anglers using the Life History Calendar approach to determine if there were perceived changes in fishing quality for Black Bass in eastern Ontario across different time periods. For
Joel Zhang, David P. Philipp, Julie E. Claussen, Cory D. Suski, Vivian M. Nguyen, Nathan Young, Luc LaRochelle, Justin W. Lombardo, Steven J. Cooke   +8 more
wiley   +1 more source

A New Method for Generation of Soundings from Phase-Difference Measurements [PDF]

, 2014
A desirable feature of bathymetric sonar systems is the production of statistically independent soundings allowing a system to achieve its full capability in resolution and object detection.
Lurton, Xavier, Schmidt, Val E., Weber, Thomas   +2 more
core   +1 more source

Smartphone language and resting‐state EEG indicators of self‐focused attention prospectively predict major depressive disorder risk in adolescents

Journal of Child Psychology and Psychiatry, EarlyView.
Background Central to major depressive disorder (MDD) onset and maintenance is maladaptive self‐focused attention, which can be reliably indexed by greater: (a) usage of first‐person singular pronouns (e.g., I) in natural language and (b) alpha oscillations in resting‐state EEG.
Lilian Y. Li, Nayoung Kim, Esha Trivedi, Sarah E. Sarkas, Madeline M. McGregor, Aishwarya Sritharan, Katherine Durham, Ivan Alekseichuk, Allison M. Letkiewicz, Vijay A. Mittal, David Pagliaccio, Nicholas B. Allen, Randy P. Auerbach, Stewart A. Shankman   +13 more
wiley   +1 more source

Delphi consensus: First‐line use of biologics and small molecules in hidradenitis suppurativa

Journal of the European Academy of Dermatology and Venereology, EarlyView.
This Delphi Consensus study identified upgrade criteria for the use of biologics and small molecules as first‐line therapy in hidradenitis suppurativa (HS). European HS experts evaluated 16 clinical scenarios, voting on eligibility for therapy escalation.
Georgios Nikolakis, Erkan Alpsoy, Florian Anzengruber, Matthias Augustin, Falk G. Bechara, Pierre‐André Becherel, Farida Benhadou, Vincenzo Bettoli, Joana Cabete, Raffaele Dante Caposiena Caro, Antonella Di Cesare, Giovanni Damiani, Valentina Dini, Evangelos J. Giamarellos‐Bourboulis, Krisztián Gáspár, Katalin Glasenhardt, Philippe Guillem, Ariela Hafner, Barbara Horvath, John R. Ingram, Vaiva Jarienè, Gregor B. E. Jemec, Alexander Katoulis, Natalia Kirsten, Georgios Kokolakis, Piotr K. Krajewski, Aikaterini I. Liakou, Flavia Manzo Margiotta, Angelo V. Marzano, Antonio Martorell, Lukasz Matusiak, Dillon Mintoff, Alejandro Molina Leyva, Andreas Pinter, Anna Pirogova, Maurizio Podda, Francesca Prignano, Jorge Romani, Marco Romanelli, Elia Rosi, Samed Sahin, Ditte M. L. Saunte, Sylke Schneider‐Burrus, Mariano Suppa, Jacek Szepietowski, Andrea Szegedi, Simon Francis Thomsen, Thrasyvoulos Tzellos, Anastasia Trigoni, Hessel H. Van Der Zee, Kelsey Van Straalen, Skaidra Valiukevičiene, Eva Vilarrasa, Esther von Stebut, Christos C. Zouboulis   +54 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

Rapid increase in abundance and distribution of invasive pink salmon (Oncorhynchus gorbuscha) within a diverse, large Barents Sea catchment

Journal of Fish Biology, EarlyView.
Abstract Pink salmon originate from the North Pacific area but were introduced into northwest Russia from the late 1950s onwards. Since 2017, the alien species has increased dramatically in abundance and rapidly invaded adjacent areas of the North Atlantic region.
Jaakko Erkinaro, Panu Orell, Frode Fossøy, Mikko Kytökorpi, Karl Gjelland, Narve Johansen, Sigurd Domaas, Jorma Kuusela, Pierre Fagard, Eirik Frøiland, Morten Falkegård   +10 more
wiley   +1 more source

Sonar-Based Simultaneous Localization and Mapping Using the Semi-Direct Method

Journal of Marine Science and Engineering
The SLAM problem is a common challenge faced by ROVs working underwater, with the key issue being the accurate estimation of pose. In this work, we make full use of the positional information of point clouds and the surrounding pixel data.
Xu Han, Jinghao Sun, Shu Zhang, Junyu Dong, Hui Yu   +4 more
doaj   +1 more source