Return of the hard solar flares' 154 day periodicity in solar cycle 22 and evidence for a phase relationship of this periodicity between cycles 21 and 22

1990 ◽  
Vol 350 ◽  
pp. L21 ◽  
Author(s):  
G. E. Brueckner ◽  
J. W. Cook
Calphad ◽  
2015 ◽  
Vol 51 ◽  
pp. 410-411
Author(s):  
Bowen Wang ◽  
Zhizhong Zhao ◽  
Yan Lv ◽  
Guolu Li ◽  
Ling Weng ◽  
...  

2020 ◽  
Vol 6 (1) ◽  
pp. 93-101
Author(s):  
Valeriy Ruzhich ◽  
Elena Levina

We discuss the relationship of solar activity with the seismicity of Earth and reasons for the differences in the results of studies of various authors. Using the epoch superposition method, we analyze the differences in seismic activity distribution over phases of the 11-year solar cycle for the whole world, hemispheres, sectors, latitudinal belts, and individual regions. The northeastern sector of Earth has been shown to make the main contribution to the planetary distribution of seismic activity over phases of the 11-year solar cycle. We have revealed a pattern in the distribution of seismic activity over latitudinal belts: the solar cycle phases, at which the main maximum of seismic activity occurs, increase with increasing latitude in both hemispheres. For some regions, the results may differ from the generalized results for Earth due to the influence of local geodynamic conditions during the destruction of the earth's crust. In middle latitudes, the maximum number of earthquakes is shifted to the later phases of the solar cycle from west to east, which was not found for the northern regions. We discuss possible reasons for various manifestations of solar-terrestrial relationships for different regions, taking into account their different structure and geodynamic development modes. The presence of pronounced maxima of the seismic activity distribution over the 11-year solar cycle phases allows us to use them for refining the “time” parameter in the medium-term prediction of dangerous earthquakes.


2014 ◽  
Vol 4 (3) ◽  
Author(s):  
S. Eckel ◽  
F. Jendrzejewski ◽  
A. Kumar ◽  
C. J. Lobb ◽  
G. K. Campbell

2020 ◽  
Vol 895 (1) ◽  
pp. 3
Author(s):  
Xiantong Wang ◽  
Yang Chen ◽  
Gabor Toth ◽  
Ward B. Manchester ◽  
Tamas I. Gombosi ◽  
...  

Author(s):  
Yaoxing Shang ◽  
Hong Tang ◽  
Huawang Sun ◽  
Changbin Guan ◽  
Shuai Wu ◽  
...  

The reduction of fluid ripple in pipes is extremely important for the reliability and safety of aircrafts and ships. Currently, most researches only pay attention to the discharge port and ignore the suction port and the inherent characteristic of the axial pump between both ports, which may cause significant underestimation of fluid ripple especially in the closed-loop hydraulic system. Therefore, the aim of this study is to propose a novel passive fluid ripple attenuator, which can simultaneously reduce discharge and suction pulsation of the axial-piston pump, and adapt to the condition of frequent change of load reversing in closed hydraulic system. First, the phase matching rule is discovered between discharge and suction ripple, and then based on that, the proposed discharge and suction self-oscillation principle is verified through simulation on the phase relationship of the pump internal pistons, instead of considering the two separately as before. The attenuator designed with the concept of the discharge and suction self-oscillation principle is presented, and models of how ripple generates and the attenuator works are represented analytically. The corresponding simulation model is established, and the result indicates that the ripple of both ports of the piston pump is weakened significantly. Moreover, one testing platform is developed, and the experimental study is conducted on the discharge and suction ripple. It proves that the proposed attenuator based on discharge and suction self-oscillation principle can reduce the fluid ripple effectively.


Proceedings ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 44
Author(s):  
Gianmichele Blasi ◽  
Fabio Taddei ◽  
Vittorio Giovannetti ◽  
Alessandro Braggio

The non-local manipulation of spin-entangled states by means of local gating in two parallel 2D topological insulators properly connected to two superconducting electrodes is studied. We calculate analytically the current-phase relationship of the Josephson current making use of the scattering matrix approach and we identify the various local and non-local scattering mechanisms. We show that the Josephson critical current, remarkably, allows a direct quantification of the entanglement manipulation.


2005 ◽  
Vol 71 (5) ◽  
Author(s):  
Mark Ebel ◽  
Christian Busch ◽  
Ulrich Merkt ◽  
Miroslav Grajcar ◽  
Tomáš Plecenik ◽  
...  

1987 ◽  
Vol 42 (11-12) ◽  
pp. 1335-1338 ◽  
Author(s):  
Charlotte Helfrich ◽  
Wolfgang Engelmann

per° Mutants of Drosophila melanogaster which are exposed to light-dark cycles (LD) with different Zeitgeber period (T) have a limited range of entrainment. Entrained flies show a characteristic phase relationship of activity to the LD which depends on the period of the driving cycle as expected by oscillator theory. Both facts are taken as evidence that per° possesses endogenous oscillators and that the per gene product is not concerned with central clock structures but rather might be responsible for the mutual coupling between the individual oscillators in a multioscillatory system controlling locomotor activity.


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