Results 81 to 90 of about 821,989 (218)

Multiple-target CW FM radar [PDF]

open access: yes, 1972
Development of a multiple-target CW FM radar is described. This type of radar has advantages over pulse radars particularly in portable, battery operated applications.NAhttp://archive.org/details ...
Hoisington, D. B. (David B.)
core   +2 more sources

Rare‐Earth–Sulfur Surface Modification Enables SiC Ceramics for Low‐Frequency Electromagnetic Wave Absorption in Extreme Environments

open access: yesAdvanced Science, Volume 13, Issue 55, 5 October 2026.
By altering surface chemical bonds to prolong relaxation time and shift absorption to lower frequencies, SiC/rare earth–sulfur (RE─S, RE = La, Ce, Pr, Sm, Gd, Er) materials achieve excellent low‐frequency electromagnetic wave absorption under extreme conditions, offering a new direction for designing high‐performance SiC‐based absorbers.
Zhanming Wu   +5 more
wiley   +1 more source

Sequential Monte Carlo algorithms for joint target tracking and classification using kinematic radar information [PDF]

open access: yes, 2004
This paper considers the problem of joint maneuvering target tracking and classification. Based on recently proposed Monte Carlo techniques, a multiple model (MM) particle filter and a mixture Kalman filter (MKF) are designed for two-class identification
Angelova, Donka, Mihaylova, L.
core   +3 more sources

Autoantibodies to Extracellular Erythrocyte Band 3 Epitopes Are Associated With Anemia in Plasmodium vivax Infection

open access: yesAmerican Journal of Hematology, Volume 101, Issue 10, Page 2592-2604, October 2026.
ABSTRACT Plasmodium vivax‐associated anemia is a multifactorial clinical outcome, in which the destruction of uninfected red blood cells (uRBCs) plays a major role in disease development and severity. Here, we identified autoantibody targets within the extracellular loops of Band 3 (B3), a major erythrocyte transmembrane protein.
Aline Marzano‐Miranda   +6 more
wiley   +1 more source

MODELING OF BISTATIC RADAR CLUTTER

open access: yesPerner’s Contacts, 2012
The bistatic radar forms a basic part of multistatic radar systems for Air Traffic Control. The effort in this article is to provide the inside and make basis for future research of the bistatic radar clutter.
Marek Pola, Pavel Bezoušek
doaj  

Long‐distance pollen transport mediated by migratory hoverflies

open access: yesEcography, Volume 2026, Issue 10, October 2026.
Long‐distance animal migrations shape ecosystems by redistributing nutrients, connecting populations, and mediating ecological interactions. However, the ecological contributions of many abundant insect migrants remain poorly quantified. Hoverflies are among the most numerous migratory insects and highly efficient pollinators, suggesting that their ...
Antonín Hlaváček   +8 more
wiley   +1 more source

The NOAA FM-CW Snow-Level Radar

open access: yesJournal of Atmospheric and Oceanic Technology, 2017
AbstractA vertically pointing radar for monitoring radar brightband height (BBH) has been developed. This new radar utilizes frequency-modulated continuous wave (FM-CW) techniques to provide high-resolution data at a fraction of the cost of comparable pulsed radars.
Paul E. Johnston   +5 more
openaire   +1 more source

Internal Permafrost Structure of Geomorphologically Distinct Palsas in Northern Sweden Revealed by Quasi‐3D ERT

open access: yesPermafrost and Periglacial Processes, Volume 37, Issue 4, Page 668-681, October/December 2026.
ABSTRACT Permafrost in northern peatlands occurs within individual palsas or extensive peat plateaus and controls local carbon storage. These permafrost landforms are complex, and their internal structure remains poorly understood. We used quasi‐3D electrical resistivity tomography (ERT) measurements, supported by UAV‐LiDAR topography, frost probing ...
Cas Renette   +5 more
wiley   +1 more source

Automated Lawn Maintenance: An Agronomic and Operational Review of Turf Health, Biodiversity, and Field Performance

open access: yesJournal of Field Robotics, Volume 43, Issue 7, Page 4603-4623, October 2026.
ABSTRACT Grass mowing is one of the most resource‐consuming activities in green maintenance, whether in private areas such as home gardens or in public spaces like urban parks. In recent years, concerns related to climate change, human health, and sustainability have become increasingly prominent in green maintenance, leading manufacturers and industry
Andrea Palladini   +3 more
wiley   +1 more source

Downscaling of Tropical Cyclone Surface Wind Fields With a Hybrid Attention Transformer

open access: yesJournal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 5, October 2026.
Abstract This study employs a Hybrid Attention Transformer‐based super‐resolution model to reconstruct tropical cyclone (TC) surface wind fields. The model downscales coarse‐resolution ERA5 reanalysis data to high‐resolution HWind analyses (1998–2013), increasing the horizontal resolution by a factor of five.
Chunhua Wang   +4 more
wiley   +1 more source

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