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Using Hinode EUV Imaging Spectrometer (EIS) spectra recorded daily at Sun center from the end of 2006 to early 2011, we studied the long-term evolution of the quiet corona. The light curves of the higher temperature emission lines exhibit…

Solar and Stellar Astrophysics · Physics 2012-07-17 S. Kamio , J. T. Mariska

The electron cyclotron emission (ECE) diagnostics suite at ITER utilizes a front-end quasi-optical (QO) system whose design is fundamentally constrained by a field-stop concept. The field-stop defines the Gaussian beam variation throughout…

Plasma Physics · Physics 2026-05-27 Saeid Houshmandyar , W. L. Rowan , J. P. Ziegel , A. Ouroua

The Earth's preseismic oscillating (T = 24h) electric field recorded for a short-time period of some days is analyzed in terms of its intensity vector azimuthal direction calculated at one monitoring site. The calculated azimuthal…

Geophysics · Physics 2008-08-14 C. Thanassoulas , V. Klentos , G. Verveniotis

Hydrogeodesy can benefit greatly from the use of Global Positioning System (GPS) displacements to analyse local changes in the hydrosphere, which the commonly used Gravity Recovery and Climate Experiment (GRACE) mission is unable to provide…

Geophysics · Physics 2024-01-18 Gael Kermarrec , Anna Klos , Artur Lenczuk , Janusz Bogusz

In this paper, we explore the feasibility of using communication signals for extended target (ET) tracking in an integrated sensing and communication (ISAC) system. The ET is characterized by its center range, azimuth, orientation, and…

Signal Processing · Electrical Eng. & Systems 2025-04-02 Yiqiu Wang , Meixia Tao , Shu Sun

During the late stages of gravitational core-collapse of massive stars, extreme isospin asymmetries are reached within the core. Due to the lack of microscopic calculations of electron capture (EC) rates for all relevant nuclei, in general…

Nuclear Theory · Physics 2017-02-22 Ad. R. Raduta , F. Gulminelli , M. Oertel

This study presents the continuation of the analysis of variations of atmospheric and space weather parameters above Iberian Peninsula along two years near the 24th solar cycle maximum presented in Morozova et al. [2016]. Previously, the…

Atmospheric and Oceanic Physics · Physics 2020-06-14 Anna L. Morozova , Paulo Ribeiro , Juan Jose Blanco , Tatiana V. Barlyaeva

We show how a strongly driven single-mode oscillator coupled to a first-order dynamical system gives rise to induced absorption or gain of a weak probe beam, and associated fast or slow light depending on the detuning conditions. We derive…

Mesoscale and Nanoscale Physics · Physics 2021-12-06 Marco Clementi , Matteo Galli , Liam O'Faolain , Dario Gerace

The origin and nature of extreme energy cosmic rays (EECRs), which have energies above the 50 EeV, the Greisen-Zatsepin-Kuzmin (GZK) energy limit, is one of the most interesting and complicated problems in modern cosmic-ray physics.…

The Planck collaboration has measured the temperature and polarization of the cosmic microwave background well enough to determine the locations of eight peaks in the temperature (TT) power spectrum, five peaks in the polarization (EE)…

Cosmology and Nongalactic Astrophysics · Physics 2016-04-27 Zhen Pan , Lloyd Knox , Brigid Mulroe , Ali Narimani

The variation in the intensity of cosmic rays at small angular scales is attributed to the interstellar turbulence in the vicinity of the Solar system. We show that {a turbulent origin of the small-scale structures implies that} the…

High Energy Astrophysical Phenomena · Physics 2018-12-12 Rahul Kumar , Noemie Globus , David Eichler , Martin Pohl

Infrared solar occultation measurements are well established for remote sensing of Earth's atmosphere, and the corresponding primary transit spectroscopy has turned out to be valuable for characterization of extrasolar planets. Our…

Earth and Planetary Astrophysics · Physics 2018-03-15 Franz Schreier , Steffen Städt , Pascal Hedelt , Mareike Godolt

Upon absorbing a photon, the ionized electron sails through the target force field in attoseconds to reach free space. This navigation probes details of the potential landscape that get imprinted into the phase of the ionization amplitude.…

Atomic Physics · Physics 2024-12-12 Sajad Azizi , Mohamed El-Amine Madjet , Zheng Li , Jan M. Rost , Himadri S. Chakraborty

Characteristics of electromagnetic ion cyclotron (EMIC) waves detected by the Van Allen probes are statistically analyzed, particularly wave-band, bandwidth, and time duration. The Electric and Magnetic Field Instrument Suite and Integrated…

Space Physics · Physics 2019-01-04 Nezir Alic

The Epoch of Reionization Spectrometer (EoR-Spec) is an instrument module for the Prime-Cam receiver of the 6 m aperture CCAT-prime Telescope at 5600 m in Chile. EoR-Spec will perform 158 $\mu$m [CII] line intensity mapping of star-forming…

This paper studies the optimal state estimation problem for interconnected systems. Each subsystem can obtain its own measurement in real time, while, the measurements transmitted between the subsystems suffer from random delay. The optimal…

Systems and Control · Electrical Eng. & Systems 2023-05-03 Yan Wang , Junlin Xiong , Zaiyue Yang , Rong Su

Climate sensitivity has remained stubbornly uncertain since the Charney Report was published some 45 years ago. Two factors in future climate projections could alter this dilemma: (i) an increased ratio of CO$_2$ forcing relative to aerosol…

Atmospheric and Oceanic Physics · Physics 2025-07-22 Adam Michael Bauer , Cristian Proistosescu , Kelvin K Droegemeier

Several types of foreshock transients upstream of Earth's bow shock possessing a tenuous, hot core have been observed and simulated. Because of the low dynamic pressure in their cores, these phenomena can significantly disturb the bow shock…

Space Physics · Physics 2017-09-20 Terry Z. Liu , Vassilis Angelopoulos , Heli Hietala , Lynn B. Wilson

We present a new local interstellar spectrum for cosmic ray electrons over an energy range from 1 MeV to 70 GeV. Below (0.8 plus minus 0.2) GeV it has a power law form, E^-(1.55 plus minus 0.05), with E kinetic energy, which is consistent…

Solar and Stellar Astrophysics · Physics 2013-08-12 M. S. Potgieter , E. E. Vos , R. R. Nndanganeni , M. Boezio , R. Munini
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