Results 31 to 40 of about 8,581 (293)

The upward propagating ionospheric hiss waves during the seismic time observed by the China seismo-electromagnetic satellite

open access: yesFrontiers in Astronomy and Space Sciences, 2023
The ionospheric hiss wave is a broadband incoherent and structureless electromagnetic emission. They appear in a relatively narrower frequency range between −0.1 and 1.5 kHz. However, according to previous observations, abnormal electromagnetic emissions
Fangxian Lv   +5 more
doaj   +1 more source

Internal source of plasmaspheric hiss on Earth

open access: yes地球与行星物理论评, 2022
Plasmasphere is an upward extension of the ionosphere at low and middle latitudes along the closed magnetic field lines rooted in the Earth, where the trapped whistler-mode waves in the frequency range from tens to thousands of Hertz are named as ...
Zhenpeng Su   +3 more
doaj   +1 more source

Statistical Investigation of the Frequency Dependence of the Chorus Source Mechanism of Plasmaspheric Hiss

open access: yesGeophysical Research Letters, 2021
We use data from eight satellites to statistically examine the role of chorus as a potential source of plasmaspheric hiss. We find that the strong equatorial (|λm| 
Nigel P. Meredith   +4 more
doaj   +1 more source

The relationship between auroral hiss at high altitudes over the polar caps and the substorm dynamics of aurora [PDF]

open access: yesAnnales Geophysicae, 2005
Strong variations of intensity and cutoff frequency of the auroral hiss were observed by INTERBALL-2 and POLAR satellites at high altitudes, poleward from the auroral oval.
E. E. Titova   +9 more
doaj   +1 more source

Randomized preclinical study of machine perfusion in vascularized composite allografts

open access: yesBJS (British Journal of Surgery), EarlyView., 2020
This study was designed to identify the optimum machine perfusion parameters for preservation of limbs before transplantation, and determine whether this was better than cold storage. Normothermic machine perfusion at a pressure of 70 mmHg (NMP‐70) provided superior preservation to cold storage after transplantation.
K. R. Amin   +7 more
wiley   +1 more source

Health Information Systems for Older Persons in Select Government Tertiary Hospitals and Health Centers in the Philippines: Cross-sectional Study

open access: yesJournal of Medical Internet Research, 2022
BackgroundThe rapid aging of the world’s population requires systems that support health facilities’ provision of integrated care at multiple levels of the health care system.
Angely P Garcia   +2 more
doaj   +1 more source

The Study on Modeling of Global Plasmaspheric Hiss Amplitude Based on Deep Learning Algorithm

open access: yesSpace Weather, 2023
Plasmaspheric hiss waves make great significance on the loss of electrons in the Earth's radiation belts. The prediction and reconstruction for global evolution plasmaspheric hiss are critical to investigate the dynamic process of radiation belt. In this
Rongxin Tang   +5 more
doaj   +1 more source

Hot plasma effects on the dispersion properties of plasmaspheric hiss and its electron diffusion

open access: yes地球与行星物理论评, 2023
Electron diffusion caused by plasmaspheric hiss is an important mechanism for the loss of electrons in Earth's inner magnetosphere; it has also been considered responsible for the formation of the slot region between inner and outer radiation belts.
Xin Ma   +5 more
doaj   +1 more source

Arrival direction finding for narrow-band auroral hiss at Syowa Station

open access: yesAntarctic Record, 1982
From the direction finding (DF) observations based on the measurement of wave arrival time differences among three spaced points around Syowa Station (geomagnetic lat. -70.0°), the arrival direction of narrow-band auroral hiss was examined.
Masanori Nishino   +2 more
doaj   +1 more source

Fluctuation of Lower Ionosphere Associated with Energetic Electron Precipitations during a Substorm

open access: yesAtmosphere, 2021
In this paper, using the combined observations of the NOAA 16, LANL-01A, IMAGE satellites, VLF radio wave, and ground-based riometers, we study the fluctuation of lower ionosphere-associated precipitating energetic electrons during a geomagnetic storm on
Tongxing Fu   +3 more
doaj   +1 more source

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