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  1. Article

    Open Access

    One-way ticket to the moon? An NLP-based insight on the phenomenon of small-scale neo-broker trading

    We present an Natural Language Processing based analysis on the phenomenon of “Meme Stocks”, which has emerged as a result of the proliferation of neo-brokers like Robinhood and the massive increase in the num...

    Gillian Kant, Ivan Zhelyazkov, Anton Thielmann… in Social Network Analysis and Mining (2024)

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  2. Article

    Open Access

    Outbreaks of publications about emerging infectious diseases: the case of SARS-CoV-2 and Zika virus

    Outbreaks of infectious diseases generate outbreaks of scientific evidence. In 2016 epidemics of Zika virus emerged, and in 2020, a novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) caused a p...

    Aziz Mert Ipekci, Diana Buitrago-Garcia… in BMC Medical Research Methodology (2021)

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  3. No Access

    Article

    Kinematics and Energetics of the EUV Waves on 11 April 2013

    In this study, we present the observations of extreme-ultraviolet (EUV) waves associated with an M6.5 flare on 2013 April 11. The event was observed by Solar Dynamics Observatory (SDO) in different EUV channels. ...

    Aarti Fulara, Ramesh Chandra, P. F. Chen, Ivan Zhelyazkov… in Solar Physics (2019)

  4. Article

    Correction to: Investigation of recurrent EUV jets from highly dynamic magnetic field region

    Correction to: Astrophys Space Sci (2017) 362:10 DOI 10.1007/s10509-016-2983-x ...

    Navin Chandra Joshi, Ramesh Chandra, Yang Guo… in Astrophysics and Space Science (2017)

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  5. No Access

    Article

    Investigation of recurrent EUV jets from highly dynamic magnetic field region

    In this work, we present observations and interpretations of recurrent extreme ultraviolet (EUV) jets that occurred between 2012 July 1 21:00 UT and 2012 July 2 10:00 UT from the western edge of the NOAA activ...

    Navin Chandra Joshi, Ramesh Chandra, Yang Guo… in Astrophysics and Space Science (2016)

  6. No Access

    Article

    Ion flux's pressure dependence in an asymmetric capacitively coupled rf discharge in NF3

    Starting from an analytical macroscopic/phenomenological model yielding the self-bias voltage as a function of the absorbed radio-frequency (rf) power of an asymmetric capacitively coupled discharge in NF3 this p...

    Emil Mateev, Ivan Zhelyazkov in Central European Journal of Physics (2004)

  7. No Access

    Article

    Self-consistent modelling of argon microwave discharge sustained by electromagnetic wave in dipole mode

    Microwave discharges produced by travelling/standing electromagnetic waves have drawn considerable attention in recent years due to their wide application in microelectronic industry. Here are presented the ax...

    Anelia Achanova, Ivan Zhelyazkov, Tsvetelina Petrova in Czechoslovak Journal of Physics (2004)

  8. No Access

    Chapter

    Theory of Low-Pressure Plasma Columns Produced by Electromagnetic Waves in the Presence of a Constant Axial Magnetic Field

    The axial structure of an isotropic plasma column, sustained by an electromagnetic surface wave, as well as the wave characteristics (wave power, wave number and wave field components) for the simplest configu...

    Ivan Zhelyazkov in Microwave Discharges (1993)