Results 11 to 20 of about 1,967 (140)

Characterization of Transponder Antennas Using Intermodulation Response [PDF]

open access: yes, 2015
The intermodulation measurement technique enables measuring transponder antennas without any cable connections. This contactless technique exploits the inherent nonlinearity of the transponder to generate intermodulation products that can be measured. In
Hannula, Jari-Matti   +2 more
core   +1 more source

Comparing estimates of census and effective population size in an endangered amphibian

open access: yesAnimal Conservation, Volume 26, Issue 6, Page 839-850, December 2023., 2023
The field of conservation has seen a shift in focus from monitoring trends in census population size to trends in ‘effective’ population size. Using data from a long‐term study of reticulated flatwoods salamanders (Ambystoma bishopi) we assessed changes in census population sizes and the effective number of breeders.
G. C. Brooks   +3 more
wiley   +1 more source

Space-based tests of gravity with laser ranging [PDF]

open access: yes, 2006
Existing capabilities in laser ranging, optical interferometry and metrology, in combination with precision frequency standards, atom-based quantum sensors, and drag-free technologies, are critical for the space-based tests of fundamental physics; as a ...
JAMES G. WILLIAMS   +4 more
core   +2 more sources

Uncertainty analysis of intermodulation-based antenna measurements [PDF]

open access: yes, 2016
Intermodulation measurement principle has been proposed for characterizing transponder antennas. Although the method seems to offer certain advantages compared to traditional antenna characterization methods, the measurement uncertainty has not yet been ...
Hannula, Jari-Matti, Viikari, Ville
core   +1 more source

Advancing Tests of Relativistic Gravity via Laser Ranging to Phobos [PDF]

open access: yes, 2010
Phobos Laser Ranging (PLR) is a concept for a space mission designed to advance tests of relativistic gravity in the solar system. PLR's primary objective is to measure the curvature of space around the Sun, represented by the Eddington parameter $\gamma$
A Einstein   +94 more
core   +2 more sources

Method and apparatus for measuring distance [PDF]

open access: yes, 1988
The invention employs a continuous wave radar technique and apparatus which can be used as a distance measuring system in the presence of background clutter by utilizing small passive transponders.
Kobayashi, Herbert S.   +2 more
core   +1 more source

Validating gut flushing as a non‐lethal sampling technique for diet monitoring in agastric fish

open access: yesJournal of Fish Biology, EarlyView.
Abstract Non‐lethal diet sampling is essential where individual‐level monitoring and welfare matter, yet evidence on season‐long outcomes in agastric fishes is scarce. We tested syringe‐based gut flushing in pond‐reared common carp Cyprinus carpio over one growing season (April–September) using PIT‐tagged fish assigned a priori to three handling ...
Lenka Kajgrova   +5 more
wiley   +1 more source

Communications satellite technology [PDF]

open access: yes, 1964
Communications satellite technology - echo, relay, and syncom ...
Hedrich, A. L.
core   +1 more source

Selection Against Hybrids Maintains Genetic Divergence Between Populations of a Coastal Cleaner Fish Translocated Across a Genetic Break

open access: yesEvolutionary Applications, Volume 19, Issue 3, March 2026.
ABSTRACT Genetic divergence between populations and/or species is mainly driven by reproductive isolation, that is, reduced gene flow, due to either pre‐ and/or postzygotic barriers. In this study, we investigate the role of (i) reproductive ecological interactions and (ii) mechanisms of evolutionary isolation between two genetically differentiated ...
Enrique Blanco Gonzalez   +4 more
wiley   +1 more source

Home - About - Disclaimer - Privacy