Results 61 to 70 of about 14,072,652 (376)
Atmospheric Science Letters, Volume 24, Issue 1, January 2023., 2023 We report on a meeting on progress and challenges in convection‐permitting data assimilation. Novel developments include the assimilation of novel observations such as cloud‐affected satellite radiances, ground‐based profiling networks and aircraft data, as well as methodological advancements in error covariance modelling, and progress in operational ...
Guannan Hu +7 more
wiley +1 more source
Galilean and relativistic Doppler/aberration effects deduced from spherical and ellipsoidal wavefronts respectively [PDF]
, 2021 The diagram showing off-center nested spheres which is traditionally used to illustrate the Doppler effect, is misleading and its trigonometric analysis leads to errors concerning light, because electromagnetic Doppler and aberration effects conform to a wavefront surface that is not a sphere but an ellipsoid stretched along the trajectory of the ...
arxiv +1 more source
Experimental Study of LoRa Modulation Immunity to Doppler Effect in CubeSat Radio Communications
IEEE Access, 2019 Currently, LoRa technology is one of the most promising technologies in satellite Internet of Things. Particularly those based on satellite constellations in low Earth orbit, including the CubeSat nanosatellite constellations.
A. Doroshkin +4 more
semanticscholar +1 more source
On the lithium abundance of the visual binary components ξ Boo A (G8V) and ξ Boo B (K5V)
Astronomische Nachrichten, Volume 343, Issue 9-10, November-December 2022., 2022 Abstract A spectroscopic investigation of the lithium resonance doublet in ξ Boo A and ξ Boo B in terms of both abundance and isotopic ratio is presented. We obtained new R = 130,000 spectra with a signal‐to‐noise ratio (S/N) per pixel of up to 3200 using the 11.8 m LBT and PEPSI.
Klaus G. Strassmeier, Matthias Steffen
wiley +1 more source
Christian Doppler and the Doppler effect
Eos, Transactions American Geophysical Union, 1984 A summary is given of Doppler's life and career. He was born 180 years ago on November 29, 1803, in Salzburg, Austria. He died on March 17, 1853 in Venice. The effect bearing his name was first announced in a presentation before the Royal Bohemian Society of the Sciences in Prague on May 25, 1842.
openaire +3 more sources
Extraction of Unaliased High-Frequency Micro-Doppler Signature using FMCW radar [PDF]
arXiv, 2022 Micro-Doppler signature is a potent feature that has been used for target identification and micro-motion parameter estimation. The extraction of high frequency micro-Doppler signature from frequency modulated continuous wave (FMCW) radar along with the target range and velocity is the problem considered in this article. The severe aliasing of the high
arxiv
Missing Transverse-Doppler Effect in Time-Dilation Experiments with High-Speed Ions [PDF]
Eur.Phys.J.C69:343-346,2010, 2010 Recent experiments with high-speed ions have investigated potential deviations from the time-dilation predicted by special relativity (SR). The main contribution of this article is to show that the SR predictions are matched by the experimental results only when the transverse Doppler effect in the observed emissions from the ions are neglected in the ...
arxiv +1 more source
Biotechnology Journal, Volume 18, Issue 1, January 2023., 2023 Graphical Abstract and Lay Summary The heterogenous production conditions in large‐scale bioreactors cause scale‐up problems, such as reduced biomass or product yield, to occur during bioprocesses. In this study, we designed a two‐compartment scale‐down reactor and used it to simulate large‐scale heterogenous production conditions, allowing us to ...
Florian Mayer +7 more
wiley +1 more source
A New Approach for Testing Fetal Heart Rate Monitors
Sensors, 2020 In this paper, a new approach for the periodical testing and the functionality evaluation of a fetal heart rate monitor device based on ultrasound principle is proposed.
Daniele Bibbo +10 more
doaj +1 more source
Reconciling inverse-Compton Doppler factors with variability Doppler factors in blazar jets [PDF]
A&A 602, A104 (2017), 2015 Blazar population models have shown that the inverse-Compton and variability Doppler factor estimates yield consistent results at the population level for flat spectrum radio quasars (FSRQs). The two methods, however, are inconsistent when compared on a source-by-source basis.
arxiv +1 more source