Results 1 to 10 of about 2,029,853 (153)

Additive genetic variation, but not temperature, influences warning signal expression in Amata nigriceps moths (Lepidoptera: Arctiinae) [PDF]

open access: yesEcology and Evolution, 2022
Many aposematic species show variation in their color patterns even though selection by predators is expected to stabilize warning signals toward a common phenotype.
Georgina E. Binns   +5 more
doaj   +2 more sources

A Novel Two-Step Scheme Based on Joint GO-DPCA and Local STAP in Image Domain for Multichannel SAR-GMTI

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Multichannel synthetic aperture radar ground moving target indication has been widely used and get great attention nowadays. Traditional adaptive methods like space-time adaptive processing (STAP) need to calculate and search the maximum of the test ...
Zhihao Wang   +5 more
doaj   +1 more source

Individual Differences in Signal Perception for Takeover Request in Autonomous Driving

open access: yesApplied Sciences, 2023
In the context of partial autonomy, where autonomous vehicles and humans share control of the vehicle, bringing out-of-the-loop drivers back into the loop is a significant challenge.
Okkeun Lee, Hyunmin Kang
doaj   +1 more source

Investigation of rainstorm warning and its difference under different synoptic conditions in Shanghai

open access: yes暴雨灾害, 2022
Based on the hourly observation data of 79 automatic weather stations in Shanghai from 2010 to 2020 and the rainstorm warning signal data issued by the Shanghai Meteorological Center and District Meteorological Centers from 2016 to 2020, the spatial and ...
Weidong ZHOU   +5 more
doaj   +1 more source

Brightly coloured tissues in limid bivalves chemically deter predators [PDF]

open access: yesRoyal Society Open Science, 2019
Members of the marine bivalve family Limidae are known for their bright appearance. In this study, their colourful tissues were examined as a defence mechanism towards predators.
Lindsey F. Dougherty   +4 more
doaj   +1 more source

Intelligent Detection and Segmentation of Space-Borne SAR Radio Frequency Interference

open access: yesRemote Sensing, 2023
Space-borne synthetic aperture radar (SAR), as an all-weather observation sensor, is an important means in modern information electronic warfare. Since SAR is a broadband active radar system, radio frequency interference (RFI) in the same frequency band ...
Jiayi Zhao   +8 more
doaj   +1 more source

THREAT MONITORING IN DEFENSE AND SECURITY SYSTEMS – METHODOLOGICAL ASPECTS [PDF]

open access: yesDefence Science Review, 2018
The article addresses the problem of increasing the effectiveness of warning systems about threats. The problem of so-called „surprises” is the problem of these types of systems, which are the result of not being able to see the symptoms of incoming ...
Bogdan Ćwik
doaj   +1 more source

Detection of Maneuvering Target Based on Modified AMF

open access: yesLeida xuebao, 2015
Owing to the Doppler frequency migration of the return signal of maneuvering targets and finite training samples, it is difficult to detect maneuvering targets by conventional Adaptive Matched Filter (AMF) detectors.
Li Hai   +3 more
doaj   +1 more source

Unexpected colour pattern variation in mimetic frogs: implication for the diversification of warning signals in the genus Ranitomeya

open access: yesRoyal Society Open Science, 2023
Predation is expected to promote uniformity in the warning coloration of defended prey, but also mimicry convergence between aposematic species. Despite selection constraining both colour-pattern and population divergence, many aposematic animals display
Ugo Lorioux-Chevalier   +4 more
doaj   +1 more source

Timing of Gun Fire Influences Sprinters’ Multiple Joint Reaction Times of Whole Body in Block Start

open access: yesFrontiers in Psychology, 2017
Experienced sprinters are specifically adapted to pre-planning an advanced motor program. Herein, sprinters are able to immediately accelerate their center of mass forward with a whole-body coordinated motion, following a steady state crouched position ...
Mitsuo Otsuka   +2 more
doaj   +1 more source

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