output
20192026
most citedHigh Energy Storage Efficiency and Large Electrocaloric Effect in Lead-Free BaTi0.89Sn0.11O3 Ceramic

79 citations

9 papers

quant-ph2026

Statevector-to-Hardware Reconstruction of a Four-Qubit ZZ Quantum Kernel: A Single-Backend Case Study of Three Execution Jobs

Rostyslav Sipakov

Hardware noise and finite sampling perturb the fidelity estimates forming a quantum-kernel Gram matrix. We measured how far three hardware-reconstructed Gram matrices depart from a…

physics.med-ph2025★ 1 cited

Modeling Indoor PM Exposure During Retrofits: Plastic Film Barriers and a Quadratic Baseline Approach

Rostyslav Sipakov, Olena Voloshkina

Temporary plastic film barriers are widely used to separate occupied rooms from exterior renovation zones, yet their effect on indoor particulate exposure is poorly quantified. We…

stat.ME2024★ 7 cited

Leveraging Quadratic Polynomials in Python for Advanced Data Analysis

Rostyslav Sipakov, Olena Voloshkina, Anastasiia Kovalova

This research explores the application of quadratic polynomials in Python for advanced data analysis. The study demonstrates how quadratic models can effectively capture nonlinear…

cond-mat.mtrl-sci2023★ 1 cited

Structural, dielectric and energy storage properties of BaO-Na2O-Nb2O5-P2O5 glass-ceramic

Abderrahim Ihyadn, Abdelilah Lahmar, Igor Lukyanchuk +5

A series of (1-x)[(2BaO-0,5Na2O)-1P2O5] -xNb2O5 (BNPN, x=0,41, 0,43, 0,45, 0,48) glass-ceramics based on phosphate glasses have been prepared via a controlled-crystallization route…

cs.SE2023

Approaches to Improving the Accuracy of Machine Learning Models in Requirements Elicitation Techniques Selection

Denys Gobov, Olga Solovei

Selecting techniques is a crucial element of the business analysis approach planning in IT projects. Particular attention is paid to the choice of techniques for requirements elici…

astro-ph.EP2023

Comparative analysis of observations of the selected exoplanet transits obtained at the Kyiv Comet station with the database of the orbital telescopes TESS and Kepler

M. Lobodenko, Ya. Pavlenko, I. Kulyk +3

We present a comparative analysis of observations of the selected exoplanet transits obtained at the Kyiv Comet station with the database of the TESS (Transiting Exoplanet Survey S…