Explanipedia

Gowers norms for linearly recurrent numeration systems Open

P. Jelínek · 2025

Gowers norms have been a key component in the proofs of many breakthrough results in connection to the sum of digits function. Spiegelhofer has used them to show that the Thue-Morse sequence has level of distribution 1 and also that it is …

Formation of Jet-driven Forced Reconnection Region and Associated Plasma Blobs in a Prominence Segment Open

Sudheer K. Mishra, A. K. Srivastava, S. P. Rajaguru, P. Jelínek · 2025

We use data from the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory to study the most likely formation of a forced reconnection region and associated plasma blobs, triggered by jetlike structures in a prominence segme…

Formation of Jet-driven Forced Reconnection Region and Associated Plasma Blobs in a Prominence Segment Open

Sudheer K. Mishra, A. K. Srivastava, S. P. Rajaguru, P. Jelínek · 2025

We use data from the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO) to study the most likely formation of a forced reconnection region and associated plasma blobs, triggered by jet-like structures in a prom…

Binary-ternary collisions and the last significant digit of $n!$ in base 12 Open

Jean‐Marc Deshouillers, P. Jelínek, Lukas Spiegelhofer · 2024

The third-named author recently proved [Israel J. of Math. 258 (2023), 475--502] that there are infinitely many \textit{collisions} of the base-2 and base-3 sum-of-digits functions. In other words, the equation \[ s_2(n)=s_3(n) \] admits i…

Turbulent plasma flow, its energies, and structures: Velocity vortices, magnetic field cocoons, and plasmoids Open

P. Jelínek, M. Karlický · 2024

Context. Turbulent flows are believed to be present in the solar corona, especially in connection with solar flares and coronal mass ejections. They are supposed to be very effective processes in energy transportation and can contribute to…

Spectroscopic Diagnostic of the Footpoints of the Cool loops Open

B. Suresh Babu, Pradeep Kayshap, Sharad C. Tripathi, P. Jelínek, B. N. Dwivedi · 2024

Statistically, the cool loop's footpoints are diagnosed using Si~{\sc iv} resonance lines observations provided by Interface Region Imaging Spectrograph (IRIS). The intensity and Full Width at Half Maximum (FWHM) of the loop's footpoints i…

Origin of Quasi-periodic Pulsation at the Base of a Kink-unstable Jet Open

Sudheer K. Mishra, Kartika Sangal, Pradeep Kayshap, P. Jelínek, A. K. Srivastava , et al. · 2023

We studied a blowout jet that occurred at the west limb of the Sun on 2014 August 29 using high-resolution imaging/spectroscopic observations provided by the Solar Dynamics Observatory/Atmospheric Imaging Assembly and the Interface Region …

Origin of Quasi-Periodic Pulsation at the Base of Kink Unstable Jet Open

Sudheer K. Mishra, Kartika Sangal, Pradeep Kayshap, P. Jelínek, Amrita Srivastava , et al. · 2023

We study a blowout jet that occurs at the west limb of the Sun on August 29$^{th}$, 2014 using high-resolution imaging/spectroscopic observations provided by SDO/AIA and IRIS. An inverse $γ$-shape flux-rope appears before the jet{--} morph…

Numerical Simulations of Oscillations in Solar Corona Excited by Vortex Shedding Open

P. Jelínek, Sofya Belov, M. Karlický · 2022

We study transverse oscillations of plasma structures in the solar corona excited by vortex shedding solving the full set of the 3D ideal time-dependent magnetohydrodynamic equations. To present how the creation of vortices and excited osc…

Transverse oscillations of a quiescent solar filament observed at the 304 Å EUV passband Open

V. V. Smirnova, Yu. T. Tsap, P. Jelínek, M. Karlický · 2022

Quasi-periodic transverse oscillations of a quiescent solar filament based on the Hα and the 304 Å EUV intensity maps have been studied. Time-distance diagrams of filament intensity variations were produced. The method of the identificatio…

The Prominence Driven Forced Reconnection in the Solar Corona and Associated Plasma Dynamics Open

A. K. Srivastava, Sudheer K. Mishra, P. Jelínek · 2021

Using the multitemperature observations from SDO/AIA on 2019 December 30, we provide a signature of prominence driven forced magnetic reconnection in the corona and associated plasma dynamics from 09:20 UT to 10:38 UT. A hot prominence seg…

The prominence driven forced reconnection in the solar corona and\n associated plasma dynamics Open

A. K. Srivastava, Sudheer K. Mishra, P. Jelínek · 2021

Using the multi-temperature observations from SDO/AIA on 30th December 2019,\nwe provide a signature of prominence driven forced magnetic reconnection in the\ncorona and associated plasma dynamics during 09:20 UT to 10:38 UT. A hot\npromin…

Transverse oscillations of a double-structured solar filament Open

P. Jelínek, M. Karlický, V. V. Smirnova, А. А. Соловьев · 2020

Aims. We study the transverse oscillations of a double-structured solar filament. Methods. We modelled the filament numerically via a 2D magnetohydrodynamic (MHD) model, in which we solved a full set of time-dependent MHD equations by mean…

On the rapid forced reconnection in the Sun's corona for its localized heating Open

A. K. Srivastava, P. Jelínek, Sudheer K. Mishra, Tanmoy Samanta, Hui Tian , et al. · 2019

The million-degree hot solar corona maintains its high temperature and compensates for its radiative losses by continuously acquiring an energy flux of $\approx$10$^{3}$ W m$^{-2,}$. Recent studies suggest that energy transport in the sola…

First Evidence of the Frequency Filtering of Magnetoacoustic Waves in the Flaring Star EK Dra Open

Aman Srivastava, J. C. Pandey, Subhajeet Karmakar, Partha Chowdhury, Yong‐Jae Moon , et al. · 2018

Using the data obtained from XMM-Newton, we show the gradual evolution of two periodicities of ~4500 s and ~2200 s in the decay phase of the flare observed in a solar analog EK Dra. The longer period evolves firstly for first 14 ks, while …

On the plasma deposition of vancomycin‐containing nano‐capsules for drug‐delivery applications Open

Chiara Lo Porto, Fabio Palumbo, Judit Buxadera‐Palomero, Cristina Canal, P. Jelínek , et al. · 2018

Aerosol‐assisted atmospheric pressure plasma allows for a one‐step synthesis of vancomycin‐containing nano‐capsules. Morphological and chemical analyses are carried out to estimate how different discharge parameters affect the plasma depos…

Magnetic swirls and associated fast magnetoacoustic kink waves in a solar chromospheric flux tube Open

K. Murawski, Pradeep Kayshap, A. K. Srivastava, D. J. Pascoe, P. Jelínek , et al. · 2017

We perform numerical simulations of impulsively generated magnetic swirls in an isolated flux tube which is rooted in the solar photosphere. These swirls are triggered by an initial pulse in a horizontal component of the velocity. The init…

Quasi-periodic processes in the flare loop generated by sudden temperature enhancements at loop footpoints Open

M. Karlický, P. Jelínek · 2016

\n Aims. During the impulsive flare phase, the plasma at the flare loop footpoints is rapidly heated by particle beams. In the present paper, we study processes that occur after this sudden heating in a two-dimensional magnetic loop.\n Met…

Magnetohydrodynamic Oscillations in the Solar Corona and Earth’s Magnetosphere: Towards Consolidated Understanding Open

V. M. Nakariakov, В. А. Пилипенко, Balázs Heilig, P. Jelínek, M. Karlický , et al. · 2016

Environmental Aspects of Renovations – Case Studies Open

J. Sedlák, P. Jelínek, Zuzana Stránská, Karel Struhala · 2015

In this paper we would like to show the readers two case studies of energy-, environmentally- and cost-efficient renovations of contemporary buildings in Czech Republic that were assessed according to the IEA ECBS Annex 56 methodology - el…

ELECTRIC CURRENT FILAMENTATION AT A NON-POTENTIAL MAGNETIC NULL-POINT DUE TO PRESSURE PERTURBATION Open

P. Jelínek, M. Karlický, K. Murawski · 2015

An increase of electric current densities due to filamentation is an important process in any flare. We show that the pressure perturbation, followed by an entropy wave, triggers such a filamentation in the non-potential magnetic null-poin…

Spectroscopic observations and modelling of impulsive Alfvén waves along a polar coronal jet Open

P. Jelínek, A. K. Srivastava, K. Murawski, Pradeep Kayshap, B. N. Dwivedi · 2015

\n Context. The magnetic reconnection in the solar corona results in impulsively generated Alfvén waves, which drive a polar jet.\n Aims. Using the Hinode/EIS 2′′ spectroscopic observations, we study the intensity, velocity, and full width…

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