Results 91 to 100 of about 63,321 (235)

Living IoT: A Flying Wireless Platform on Live Insects

open access: yes, 2018
Sensor networks with devices capable of moving could enable applications ranging from precision irrigation to environmental sensing. Using mechanical drones to move sensors, however, severely limits operation time since flight time is limited by the ...
Almarshadi M. H.   +14 more
core   +1 more source

Repeated surging and rapid retreat of a tidewater glacier in Scotland (Younger Dryas/Greenland Stadial 1)

open access: yesJournal of Quaternary Science, Volume 40, Issue 4, Page 622-633, May 2025.
ABSTRACT This paper presents evidence of glacier surging in the British landform record. We use new high‐resolution multibeam‐echosounder bathymetry data to map the submarine geomorphology of a former tidewater glacier that drained the Skye Icefield, NW Scotland, during the Younger Dryas Stadial (Greenland Stadial 1) ca. 12.9–11.7 ka.
Tom Bradwell, Douglas I. Benn
wiley   +1 more source

An 11-meter deployable truss for the SEASAT radar antenna [PDF]

open access: yes, 1979
A folding three dimensional truss and tripod assembly which deploys the SEASAT Synthetic Aperture Radar Antenna is described. The folding structure with the antenna panels and rf components stows in an 8.5-inch-thick package.
Campbell, B. E., Hawkins, W.
core   +1 more source

Link Between Stochastic Grid Perturbation and Location Uncertainty Framework

open access: yesJournal of Advances in Modeling Earth Systems, Volume 17, Issue 5, May 2025.
Abstract This paper investigates the relationship between a Stochastic Grid Perturbation (SGP) and Location Uncertainty (LU) in the context of ocean modeling. The LU formulation, which introduces random velocity fluctuations, has shown efficacy in organizing large‐scale flow and replicating long‐term statistical characteristics.
S. Clement   +6 more
wiley   +1 more source

Estimate of sizes of small asteroids (cosmic bodies) by the method of stroboscopic radiolocation [PDF]

open access: yes, 2014
Radiolocation methods of probing minor celestial bodies (asteroids) by the nanosecond pulses can be used for monitoring of near-Earth space with the purpose of identification of hazardous cosmic objects able to impact the Earth. Development of the methods that allow to improve accuracy of determining the asteroids size (i.e. whether it measures tens or
arxiv   +1 more source

Radar waveform generative design method

open access: yesElectronics Letters
To address the issue of radar detection performance degradation caused by interference in complex electromagnetic environments, this paper proposes a generative waveform design method and demonstrates its advantages.
Yuhao Hu   +3 more
doaj   +1 more source

The delta S (delta R)-2 question: The pulse-length dependence of signal power for Fresnel scatter [PDF]

open access: yes, 1983
It is proposed that the enhanced echoes from the atmosphere observed with a vertically pointing radar are due to reflections from horizontally stratified layers.
Hocking, W. K.
core   +1 more source

Digital constant‐envelope modulation scheme for radar using multicarrier OFDM signals

open access: yesIET Signal Processing, 2017
Multicarrier signals using orthogonal frequency division multiplexing (OFDM) bring many advantages to radar such as low probability of intercept, improved target detection performance, optimisation of both radar transmitter and receiver etc. A major drawback of multicarrier OFDM signals is their high peak-to-mean envelope power ratio, which reduces the
Fu Wei, Defu Jiang, Qian Rong
openaire   +1 more source

Colored Radiative Cooling: from Photonic Approaches to Fluorescent Colors and Beyond

open access: yesAdvanced Materials, Volume 37, Issue 15, April 16, 2025.
Colored radiative cooling (CRC) has become a prevailing technology for achieving colorful appearance and simultaneously enhancing the effective solar reflectance of cooling coatings. This review presents recent advancements in CRC and its profound impact on energy savings in real‐world applications.
Tao Wang   +5 more
wiley   +1 more source

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