Rekha, M., Department of EEE, Gokaraju Rangaraju Institute of Engineering and Technology, Bachupally, Hyderabad, India Rekik, B., Laboratory of Physical-Chemical Inorganic Materials and their applications (LPCMIA), Saad Dahleb University, Blida, Algeria Remache, L., Laboratory of Materials and System Structure and their Reliability, Oum El Bouaghi University, Oum El Bouaghi, Algeria Remeta, Eugene Yu., Institute of Electron Physics, National Academy of Sciences of Ukraine, Uzhhorod, Ukraine Resan, S., Molecular Engineering and Computational Modeling Lab, Department of Physics, College of Science, University of Basrah, Basrah, Iraq Reshetnyak, Nikolay, National Science Center “Kharkov Institute of Physics and Technology”, Kharkiv, Ukraine Reshetnyak, Serhii, National Technical University of Ukraine „Kyiv Polytechnic Institute”, Kyiv, Ukraine Reva, S., V.N. Karazin Kharkiv National University61022, Kharkiv, 4, Svobody sq. Reva, S., V.N. Karazin Kharkiv National University61022, Kharkiv, 4, Svobody sq., Revathi, Gadamsetty, Department of Mathematics, Gokaraju Rangaraju Institute of Engineering and Technology, Bachupally, Hyderabad, India Revathi, Gadamsetty, Department of Mathematics, Gokaraju Rangaraju Institute of Engineering and Technology, Bachupally, Hyderabad, India Reymbaeva, S.R., National university of Uzbekistan, Tashkent, Uzbekistan Rezini, Saliha, Faculty of Sciences and Technology, Abdelhamid Ibn Badis University, Mostaganem, Algeria Rezunenko, S., V.N. Karazin Kharkiv National University, Kharkiv, Ukraine Riabchykov, Dmytro , V.N. Karazin Kharkiv National University, Kharkiv, Ukraine Riabenko, Iuliia, V.N. Karazin Kharkiv National University, School of radiophysics, biomedical electronics and computer systems, Kharkiv, Ukraine; Institute of Quantum Optics, Leibniz University Hannover, Hannover, Germany Riabenko, Iuliia, V.N. Karazin Kharkiv National University, School of radiophysics, biomedical electronics and computer systems, Kharkiv, Ukraine; Institute of Quantum Optics, Leibniz University Hannover, Hannover, Germany Ridha, Salah M.A., Department of Physics, College of Science, University of Kirkuk, Iraq Ridha, Salah M.A., Department of Physics, College of Sciences, University of Kirkuk, Kirkuk, Iraq Rihia, Ghani, LEVRES Laboratory, University of El Oued, El Oued, Algeria Rizamuxamedova, G.B., Namangan State Technical University, Namangan, Uzbekistan Rodionov, S., National Science Center “Kharkov Institute of Physics and Technology”, Kharkiv, Ukraine Rogov, Yu., V.N. Karazin Kharkiv National University, Kharkiv, Ukraine Rogov, Yurii, National Science Center “Kharkov Institute of Physics and Technology”, Kharkiv, Ukraine Rokhmanov, Nikolay, Kharkiv National Agrarian University named after V. V. Dokuchaiev «Dokuchaieske-2», Kharkiv region, Ukraine Romanova, M. V., Department of Nuclear and Medical Physics, V.N. Karazin Kharkiv National University 4 Svobody Sq., Kharkov, 61022, Ukraine; Romanovska-Dzalbe, E., Institute of Life Sciences and Technology, Daugavpils University, Daugavpils, Latvia Romashchenko, Elena V., V.N. Karazin Kharkiv National University, Kharkiv, Ukraine Romashyna, V., Department of Medical Physics and Biomedical Nanotechnologies, V.N. Karazin Kharkiv National University, Kharkiv, Ukraine Roskoshna, Olena, National Science Center “Kharkiv Institute of Physics and Technology”, Kharkiv, Ukraine Rostova, Hanna, National Science Center “Kharkov Institute of Physics and Technology”, Kharkiv, Ukraine Rout, Madan Mohan, Centurion University of Technology and Management, Paralakhemundi, Odisha, India Roy, Satyabhushan, Department of Mathematics, Cotton University, Guwahati, India Roy, Satyabhushan, Department of Mathematics, Cotton University, Guwahati, India Roy, Sudipto, Department of Physics, St. Xavier's College, Kolkata, West Bengal, India Roy, Sudipto, Department of Physics, St. Xavier's College, Kolkata, West Bengal, India Roy, Sudipto, Department of Physics, St. Xavier’s College, Kolkata, West Bengal, India Roy, Sudipto Saha, St. Xavier’s College, Kolkata, India Roy Baruah, Rajshekhar, Department of Mathematical Sciences, Bodoland University, Kokrajhar, BTR-783370, Assam, India Rozhkov, A., National Technical University “Kharkiv Polytechnic Institute”, Kharkov, Ukraine Rubai, Sadeka Sultana, Department of Physics, University of Chittagong, Chittagong, Bangladesh Ruban, Vadym P., O.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine, Kharkiv, Ukraine Rud, Natalia V., National Science Center “Kharkov Institute of Physics and Technology”, Kharkiv, Ukraine Rud, Roman, “Nuclear Fuel Cycle” Science and Technology Establishment of National Science Center “Kharkiv Institute of Physics and Technology”, Kharkiv, Ukraine Rud', Nataliia, National Science Center Kharkiv Institute of Physics and Technology Rudakov, Vasiliy, Institute of Plasma Physics, NSC KIPT Rudakov, Vasiliy, National Science Center “Kharkov Institute of Physics and Technology”, Kharkiv, Ukraine Rudchyk, V., O.I. Akhiezer Department for Nuclear Physics and High Energy Physics, V.N. Karazin Kharkiv National University, Kharkiv, Ukraine Rudenko, A. G., National Science Center ″Kharkov Institute of Physics and Technology″ 1 Academicheskaya av., Kharkov, 61108, Ukraine Rudnikov, Yevgenii G., Taras Shevchenko National University of Kyiv, Kyiv, Ukraine; National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine