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I. S. Knyazeva
Researcher at Saint Petersburg State University
Publications - 33
Citations - 154
I. S. Knyazeva is an academic researcher from Saint Petersburg State University. The author has contributed to research in topics: Computational topology & Flare. The author has an hindex of 7, co-authored 32 publications receiving 146 citations. Previous affiliations of I. S. Knyazeva include Pulkovo Observatory & Russian Academy of Sciences.
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Cloud point extraction of lanthanide(III) ions via use of Triton X-100 without and with water-soluble calixarenes as added chelating agents.
Asiya R. Mustafina,Julia Elistratova,Alexander R. Burilov,I. S. Knyazeva,Rustem Zairov,Rustem Amirov,Svetlana E. Solovieva,Alexander I. Konovalov +7 more
TL;DR: First synthesized PhR was found to be the most efficient chelating agent exhibiting pH-dependent selectivity within La(III), Gd(III) and Yb( III) in CPE.
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Detection of new emerging magnetic flux from the topology of SOHO/MDI magnetograms
TL;DR: In this article, a topological method for detecting the new emergence of magnetic flux using SOHO/MDI magnetograms of the full solar disk is proposed, which uses the number of pixels in the image that can be distinguished from a specified value to within a predetermined threshold (the number of disconnected components).
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Topology of magnetic fields from MDI data: Background field
TL;DR: In this article, a quantitative description of the geometry and topology of the magnetic field of the Sun is given in terms of Minkowski functionals: the Euler characteristic and the perimeter of excursion sets for specified levels.
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Methods of Computational Topology for the Analysis of Dynamics of Active Regions of the Sun
TL;DR: The results show that the proposed formalism allows one to find some precursors of major flares for practically significant time slots.
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Comparison of the dynamics of active regions by methods of computational topology
TL;DR: The temporal evolution of ARs is analyzed with modern prognostic parameters and descriptors obtained by methods of computational topology and it is shown that these methods are more suitable for describing the actual situation.