Results 31 to 40 of about 3,568,047 (295)
, 2011 The hemispherical 10" photomultiplier tube (PMT) R7081 from Hamamatsu Photonics K.K. (HPK) is used in various experiments in particle and astroparticle physics.
Bauer, C. +11 more
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A comparative study of GPS ionospheric scintillations and ionogram spread F over Sanya [PDF]
Annales Geophysicae, 2015 We analyze the data recorded during December 2011–November 2012 by a digital ionosonde and a GPS (Global Positioning System) scintillation and (total electron content) TEC receiver collocated at Sanya (109.6° E, 18.3° N; dip lat.
Y. Zhang +12 more
doaj +1 more source
Geophysical Research Letters, 1976 A numerical simulation of the non‐linear evolution of the collisional Rayleigh‐Taylor instability using a set of equations appropriate for the equatorial F region ionosphere has been performed. Our results show that the irregularities produced by the instability grow on the bottomside of the F region peak, as predicted by linear theory, and then the ...
Anthony J. Scannapieco +1 more
openaire +1 more source
Existence of an intermediate phase for oriented percolation
, 2012 We consider the following oriented percolation model of $\mathbb {N} \times \mathbb{Z}^d$: we equip $\mathbb {N}\times \mathbb{Z}^d$ with the edge set $\{[(n,x),(n+1,y)] | n\in \mathbb {N}, x,y\in \mathbb{Z}^d\}$, and we say that each edge is open with ...
Lacoin, Hubert
core +2 more sources
Nonparametric estimation of the mixing density using polynomials [PDF]
, 2014 We consider the problem of estimating the mixing density $f$ from $n$ i.i.d. observations distributed according to a mixture density with unknown mixing distribution.
Rebafka, Tabea, Roueff, François
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Observations of Unusual Daytime Range Spread F at Middle Latitude During the Afternoon Hours
Space Weather, 2021 In this study, an unusual daytime range spread F event recorded by the ionosonde installed at Zhangye (ZHY, 39.4°N, 100.13°E, dip latitude 29.65°N) station during the afternoon of December 23, 2016 was presented.
Lehui Wei +10 more
doaj +1 more source
Remote Sensing, 2021 This study presents observations of nighttime spread F/ionospheric irregularities and spread Es at low and middle latitudes in the South East Asia longitude of China sectors during the recovery phase of the 7–9 September 2017 geomagnetic storm.
Lehui Wei +7 more
doaj +1 more source
, 2015 Empirical data on contacts between individuals in social contexts play an important role in providing information for models describing human behavior and how epidemics spread in populations. Here, we analyze data on face-to-face contacts collected in an
Barrat, Alain +5 more
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Performance degradation due to multipath noise for narrowband OFDM systems: channel-based analysis and experimental determination [PDF]
, 2015 The performance of OFDM systems over a multipath channel can strongly degrade due to the propagation delay spread. The distortion of the received signal over the fast Fourier transform window is referred to as multipath noise.
Heereman, Frédéric +4 more
core +2 more sources
On the lengths of divisible codes [PDF]
, 2019 In this article, the effective lengths of all $q^r$-divisible linear codes over $\mathbb{F}_q$ with a non-negative integer $r$ are determined. For that purpose, the $S_q(r)$-adic expansion of an integer $n$ is introduced. It is shown that there exists a $
Kiermaier, Michael, Kurz, Sascha
core +3 more sources