Results 61 to 70 of about 20,891 (205)

Optimization of Conventional Passive Sonar Detection Systems

, 1969
Abstract : The report examines three methods for maximizing the output signal- to-noise ratio of a conventional passive detection system consisting of a fixed array, non-adaptive beam forming, and square-law detection. The performance of a non-optimal system is compared to each of the three optimum configurations, and the results suggest how an ...
openaire   +3 more sources

Scalable low‐cost seabed landers: the missing link for sustained, integrated, long‐term observations in dynamic shallow seas

Remote Sensing in Ecology and Conservation, EarlyView.
Seabed landers, when equipped with a range of biotic and abiotic sensors, offer a non‐invasive and cost‐effective solution for ecosystem‐scale monitoring of Essential Biodiversity Variables (EBVs) and Essential Ocean Variables (EOVs) in dynamic shallow seas.
Arienne Calonge, Roeland Develter, Carlota Muñiz, Clea Parcerisas, Jan Reubens, Wieter Boone, Klaas Deneudt, Elisabeth Debusschere   +7 more
wiley   +1 more source

Feature Extraction of Ship-Radiated Noise Based on Intrinsic Time-Scale Decomposition and a Statistical Complexity Measure

Entropy, 2019
Extracting effective features from ship-radiated noise is an important way to improve the detection and recognition performance of passive sonar. Complexity features of ship-radiated noise have attracted increasing amounts of attention.
Junxiong Wang, Zhe Chen
doaj   +1 more source

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

Functional 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, Ritesh Chowdhry, Meilun Zhou, Ira Harmon, Ben Weinstein, S. K. Morgan Ernest, Alina Zare, Ethan P. White, Stephanie A. Bohlman   +8 more
wiley   +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

Fish welfare in a changing world: New developments and current challenges

Journal of Fish Biology, EarlyView.
Abstract The welfare of non‐human animals is central to ethical discussions on animal use, with increasing attention to fish welfare across research, aquaria, aquaculture, and fisheries. This paper reviews current theoretical approaches to animal welfare and recent advances in defining and assessing fish welfare since the seminal paper by Huntingford ...
Sonia Rey Planellas, João L. Saraiva, Eliane Gonçalves‐de‐Freitas, Pablo Arechavala‐Lopez, Bernice Bovenkerk, Michael Breen, Steven J. Cooke, Martin Føre, Lene Northwood, Lars Helge Stien, Sunil Kadri, Chris Noble, Jonatan Nilsson, Fernando Rodriguez, Cosme Salas, Peter Sandøe, Hans van de Vis   +16 more
wiley   +1 more source

Emerging technologies for reef fisheries research and management [held during the 56th annual Gulf and Caribbean Fisheries Institute meeting in Tortola, British Virgin Islands, November 2003] [PDF]

, 2006
This publication of the NOAA Professional Paper NMFS Series is the product of a special symposium on “Emerging Technologies for Reef Fisheries Research and Management” held during the 56th annual Gulf and Caribbean Fisheries Institute meeting in Tortola,

core  

Lake sturgeon (Acipenser fulvescens) growth and longevity estimated from adult capture–mark–recapture data

Journal of Fish Biology, EarlyView.
Abstract Effective fishery management policy depends on accurate life‐history data, particularly for harvested species. Longevity is a core life‐history trait that is directly related to annual survival and lifetime reproductive potential, but fish longevity is generally not well documented, particularly for long‐lived species.
Edward A. Baker, Scott F. Colborne, Nancy A. Auer, Kim T. Scribner, Douglas L. Larson, Andrew S. Briggs, Ronald M. Bruch, Margaret H. Stadig, Michael C. Donofrio   +8 more
wiley   +1 more source

Transparent and scalable client-side server selection using netlets [PDF]

, 2003
Replication of web content in the Internet has been found to improve service response time, performance and reliability offered by web services. When working with such distributed server systems, the location of servers with respect to client nodes is ...
Collier, Martin, Dharmalingam, Kalaiarul
core   +2 more sources

Autonomous underwater unmanned vehicular recovery system based on low-cost inter-aural time differentiation passive sonar [PDF]

2007 Mediterranean Conference on Control & Automation, 2007
Sensing systems for AUVs are deeply researched but post mission deployment recovery systems for these vehicles are equally important. This paper presents a low-cost recovery system designed to provide post mission recovery location discovery capabilities to AUVs.
Puneet Chhabra, Anuj Sehgal, Parth Shah, Kadarusman, Jason   +3 more
openaire   +1 more source