Results 61 to 70 of about 1,412 (212)

Persistence without prosperity at the upper range margin: Elevation, microhabitat buffering and biotic pressure in a range‐expanding spider

Ecological Entomology, EarlyView.
Anthropogenic linear features facilitate high‐elevation colonization. Parasitoid pressure declines markedly with elevation. Cocoon damage increases despite reduced parasitism at high elevation. Abstract The upper elevational range limits of thermophilic arthropods reflect constraints on population persistence rather than simple presence.
Zdeněk Vacek, Stanislav Korenko, Petr Heneberg   +2 more
wiley   +1 more source

Low Probability of Intercept Based Multicarrier Radar Jamming Power Allocation for Joint Radar and Wireless Communications Systems [PDF]

, 2017
Due to the high demand for new wireless services and shortage of available radio frequency (RF) spectrum, joint radar and communication system is considered as a coexistence solution to the RF spectrum congestion problem.
Wang, Fei, Zhou, Jiangjiang, Sellathurai, Mathini; id_orcid, Shi, Chenguang   +3 more
core   +1 more source

Power and Waveform Resource Allocation Method of LPI Netted Radar for Target Search and Tracking

IET Radar, Sonar & Navigation
A joint power and waveform resource allocation algorithm is proposed for netted radar integrated search and tracking tasks with low probability of intercept.
Longhao Xie, Wenxing Ren, Ziyang Cheng, Ming Li, Huiyong Li   +4 more
doaj   +1 more source

Linking eBird data with high spatiotemporal remote sensing products to estimate occupancy of bird populations across the island of Ireland

Ibis, EarlyView.
The vast increase in biodiversity data generated through citizen science initiatives, alongside a growing suite of remote sensing products and advanced modelling tools, has opened new avenues for rapidly, accurately and efficiently monitoring species trends to inform conservation, management and policy.
Ramiro D. Crego, Solène Gobet, John Kennedy, Brian Burke, Andrew Lynch, Dick Coombes, Sinéad Cummins, Lesley Lewis   +7 more
wiley   +1 more source

Beyond the breeding grounds: identifying post‐breeding staging areas, corridors and ecological niche of the Lesser Kestrel

Ibis, EarlyView.
The post‐breeding period is a critical yet overlooked phase in the annual cycle of migratory birds, where individuals must resolve competing bioenergetic trade‐offs between recovery from breeding, moult and migratory fuelling. Using GPS data from 54 adult Lesser Kestrels Falco naumanni tracked across Spain, we analysed 76 post‐breeding tracks to ...
Javier Hernández‐Cabello, Beatriz Rodríguez‐Moreno, Manuel B. Morales, Fernando Garcés‐Toledano, Juan Martínez‐Dalmau, Pedro P. Olea   +5 more
wiley   +1 more source

LPI Optimization Framework for Target Tracking in Radar Network Architectures Using Information-Theoretic Criteria

International Journal of Antennas and Propagation, 2014
Widely distributed radar network architectures can provide significant performance improvement for target detection and localization. For a fixed radar network, the achievable target detection performance may go beyond a predetermined threshold with full
Chenguang Shi, Fei Wang, Mathini Sellathurai, Jianjiang Zhou   +3 more
doaj   +1 more source

Dwell Time Allocation Algorithm for Multiple Target Tracking in LPI Radar Network Based on Cooperative Game

Sensors, 2020
To solve the problem of dwell time management for multiple target tracking in Low Probability of Intercept (LPI) radar network, a Nash bargaining solution (NBS) dwell time allocation algorithm based on cooperative game theory is proposed.
Chenyan Xue, Ling Wang, Daiyin Zhu
doaj   +1 more source

Dynamic Trust Formation in AI‐Enabled Automation: A Longitudinal Case Study of an Advanced Driver Assistance System

Information Systems Journal, EarlyView.
ABSTRACT Artificial intelligence (AI)–enabled automation is often utilised in systems that perform human tasks. While useful, these technologies pose a risk of adverse consequences in the case of AI failures as they operate in open environments, learn and are subject to continuous updates.
Kari M. Koskinen, Niina Mallat, Virpi Kristiina Tuunainen, Antti Lyyra   +3 more
wiley   +1 more source

Quantifying the differences in low probability of intercept radar waveforms using quadrature mirror filtering [PDF]

, 2002
Low Probability of Intercept (LPI) radars are a class of radar systems that possess certain performance characteristics causing them to be nearly undetectable by most modern digital intercept receivers.
Jarpa, Pedro F.
core  

Low probability of intercept-based distributed MIMO radar waveform design against barrage jamming in signal-dependent clutter and coloured noise [PDF]

, 2019
This study investigates the problem of low probability of intercept (LPI)-based distributed multiple-input multipleoutput (MIMO) radar waveform design against barrage jamming in signal-dependent clutter and coloured noise.
Zhou, Jianjiang, Wang, Fei, Sellathurai, Mathini; id_orcid, Shi, Chenguang   +3 more
core   +1 more source