Scientific programme

Hall 1: Invited talks

Chairperson: Desislava Ivanova

10:00-10:15

Official Opening

10:30-11:00

Virginia Kiryakova, Generalized Fractional Calculus with Special Functions Originated from Statistical Physics

11:00-11:30

Stefan Ivanov, Extremals of the Folland-Stein-Sobolev Inequality and the Obata's Type PDE on Quaternionic Contact Setting

11:30-12:00

Ravshan Ashurov, Uniqueness in the Inverse Problem of Determining the Order and Temporal Factor of the Source Term in Evolution Equations

12:00-12:30

Mariana Durcheva, Quantum Perspectives on Tropical Cryptography

12:30-13:00

Murat Gülmez, The Last Competitive Advantage: Human Capital in a Digital World

Hall 1:  Digitalization and Innovation in Pedagogy

Chairperson: Ivaylo Peev

15:00-15:20

Yoana Pavlova, Innovative Pedagogical Approaches in Education: The Sociological Game “Sociologist in Action”         

15:20-15:40

Ivaylo Peev, Emotional Intelligence as Pedagogical Capital

15:40-16:00

Todor Todorov, Broken Promises: Education, Inequality and the SDGs

16:00-16:20

Maria Todorova, Evolving Circular Pedagogy: A Framework for Immersive Transdisciplinary Learning

16:20-16:40

Radostina Veleva, Neurodiverse Ecosystems and Integrated Skills in Education: A Critical Inquiry into Design and Practice

Hall 2: Young Researcher Session: Applied Mathematics, Big Data and Artificial Intelligence

Chairperson: Anna Rozeva

15:00-15:20

Ivan Neychev and Anna Rozeva, Nowcasting with Dynamic Confidence Intervals

15:20-15:40

Marieta Marinova, Mathematical Model for VAT Regime Optimization: SME Scheme vs One-Stop Shop Decision Support for EU Micro-Enterprises

15:40-16:00

Kaloyan Nenchev, Fiscal Shocks and Currency Board Stability: Evidence from Bulgaria (1997–2025)

16:00-16:20

Dimitar Toshev, Scenario-Based Fraud and Cyber Risk Assessment in High School

16:20-16:40

Vasil Ganev, PrepAIred: Intelligent Platform for Interview Preparation and Simulation

Hall 1: Advances in Quantum Computing, Machine Learning, and Image Processing

Chairperson: Ali Moghiseh

10:00-10:20

Ana-Maria Pangeva, Yassine Ferhi, Ali Moghiseh, Alexander Geng, Desislava Ivanova and Andreas Weinmann, Schmidt Decomposition-Based Methods for Efficient Quantum Image Encoding

10:20-10:40

Ivana Bazhdarova and Desislava Ivanova, Hybrid Quantum-Safe Banking Architecture with Quantum-Assisted Fraud Detection

10:40-11:00

Kliment Chakarovski and Desislava Ivanova, Quantum Computational Analysis of BRCA1 Mutations: A Structural and Functional Perspective

11:00-11:20

Kliment Chakarovski and Desislava Ivanova, Quantum Magnetometry for Biomagnetic Detection in Uncontrolled Environments: Noise Analysis and Sensing Limits

11:40-12:00

Desislava Ivanova, Martin Hristov, Mihaela Stoycheva and Vesela Krumova, Hybrid Quantum LLM system for Biomedical Big Data Analytics: A Performance Comparison with Quantum Classifiers

12:00-12:20

Maria Marinova and Desislava Ivanova, A Quantum-Ready Streaming Preprocessing and Adaptive Routing Layer for Hybrid Quantum-Classical Analysis of Big Streaming Data

12:20-12:40

Ivan Ivanov and Zlatko Zahariev, Domain-Informed Fuzzy Encoding for Quantum Kernel Methods in a NISQ Setting: A Breast Cancer Coimbra Case Study

Hall 2:  Young Researcher Session: Applied Mathematics, Big Data and Artificial Intelligence

Chairperson: Silvia Baeva

10:00-10:20

Stanislav Bachev, Silvia Baeva and Stoyan Popov, Bank Efficiency under Economic Shocks: A DEA Approach

10:20-10:40

Emanuela Hristova, Silvia Baeva and Stoyan Popov, Modeling Financial Volatility in Response to Economic Shocks: Application of the GARCH Model

10:40-11:00

Maria Delikotseva, Stoyan Popov and Silvia Baeva, Comparative Analysis of Text Classification Methods for Mental Health

11:00-11:20

Vasilena Adamova, Silvia Baeva and Stoyan Popov, Spatio-Temporal Models for Urban Traffic Load Forecasting Using Graph Neural Networks and Temporal Transformers

11:40-12:00

George Popov, Tasho Tashev, Antoaneta Popova and Velislava Radeva, Optimization of Distribution Logistics Networks through Transportation and Storage Cost Minimization

12:00-12:20

Stoyan Popov and Duygu Duran, Integration of a Game-theoretic Model for the Distribution of Honeybees across Pastures with Varying Vegetation

12:20-12:40

Stilyan Ivanov, Stoyan Popov and Silvia Baeva, Sustainable Cooperation and Productivity in Activity-Based Work Environments

Hall 1:  Modeling and AI-Methods for Imaging and Computer Vision

Chairperson: Andreas Weinmann

15:00-15:20

Thomas März and Andreas Weinmann, Model- and Machine Learning Based Reconstruction for Magnetic Particle Imaging   

15:20-15:40

Tim Selig, Thomas März, Martin Storath and Andreas Weinmann, Sparse-View CT Reconstruction Using Learned Fourier-Domain BP Filtering

15:40-16:00

Alexander Geng, Dominique Decker, Henrike Stephani and Ali Moghiseh, Robust Fiber Segmentation of Occluded Fibers via Deep Learning with Semi-Synthetic Data Generation

Hall 1: Advances in Quantum Computing, Machine Learning, and Image Processing

Chairpersons: Desislava Ivanova

16:20-16:40

Smit Golakiya, Millisecond Coherence in n-Type Diamond: Engineering Spin Defects for Room-Temperature Quantum Sensing

16:40-17:00

Smit Golakiya, Quantum Control-Enhanced Magnetometry with Nitrogen-Vacancy Centers in Diamond

17:00-17:20

Smit Golakiya, Radio-Frequency Quantum Sensing with Nitrogen-Vacancy Centers in Silicon Carbide

17:20-17:40

Smit Golakiya, Probing Nanoscale Spin Ensembles via NV-Center-Based Double Electron-Electron Resonance Spectroscopy

17:40-18:00

Smit Golakiya, A Laboratory Introduction to Diamond NV Centers as Solid-State Quantum Magnetometers

Hall 2: E-Learning

Chairperson: Elena Halova

15:00-15:20

Georgi Malchev, Development and Application of a Web-Based Learning Aid for Optics in Physics Education

15:20-15:40

Elena Halova and Khristo Tarnev, Disciplinary Integration in Stem Teacher Education

15:40-16:00

Miroslava Ivanova and Georgi Malchev, Problem-Based Learning in Undergraduate Mathematics: An Instructional Scenario with Motion Modelling and Python

16:00-16:20

Ivelina Stefanova and Malinka Ivanova, Methodology for Using Artificial Intelligence in a Platform for Managing School STEM Education

16:40-17:00

Rositsa Andreeva and Khristo Tarnev, Simulation of a Physics Laboratory Exercise for Demonstrating Conservation Laws

17:00-17:20

Neli Sirakova and Nikolay Sirakov, Mathematical Competencies in Studying the Exponential Function and Exponential Equations and Inequalities for Constructing New Objects of an Interdisciplinary Nature

17:20-17:40

Vanyo Donev and Dena Spyrou, The Impact of Digital Storytelling on Mathematics Learning Among Bilingual Fifth-Grade Students

17:40-18:00

Dena Spyrou and Monika Simeonova-Ingilizova, A Pilot Study on the Psychological and Pedagogical Effects of Mathematical Fairy Tales in Fifth-Grade Mathematics Education

Hall 1: Mathematical Analysis and Applications & Special Functions & Fractional Calculus

Chairperson: Virginia Kiryakova

10:00-10:20

Allaberen Ashyralyev, Betul Hicdurmaz and Fatimanur Gultekin, On Time-Fractional Semilinear Schrödinger Equations in Multi-Dimensions: An Abstract Approach    

10:20-10:40

Oqila Mukhiddinova, Inverse and Non-Local Problems for Generalized Second-Kind Fluid Flow Models

10:40-11:00

Yulian Tsankov and Emilia Bazhlekova, Explicit Solution of a BVP for the Time-Fractional Diffusion Equation with Real and Complex Eigenvalues

11:20-11:40

Bogdan-Cristian Anghelina, Covers of Fractal Interpolation Surfaces with Finite Families of Octahedrons

11:40-12:00

Radu Miculescu, On the Range of Fractal Interpolation Functions

12:00-12:20

Krasimira Prodanova and Nonka Yurukova, Risk Factors for Late Mortality After Liver Transplantation

12:20-12:40

Miroslav Stoenchev, Symmetric Diophantine Systems Arising from Euclidean Geometry

Hall 2:  E-Learning

Chairperson: Roumiana Peytcheva-Forsyth

10:00-10:20

Veronika Racheva, Artificial Intelligence in School Education: Teachers’ and School Leaders’ Perspectives on Use, Opportunities, Challenges, and Future Development

10:20-10:40

Vasya Delibaltova and Margarita Bakracheva, Conceptualization and Practical Implementation of Digital Pedagogical Competencies in the Preparation of Future Teachers - the Example of Sofia University

10:40-11:00

Irena Dimova, Plamen Tsvetkov, Mihal Pavlov and Deyan Petrov, Developing the Digital Competence of Future Foreign Language Teachers at Sofia University “St. Kliment Ohridski” in Bulgaria

11:00-11:20

Lyubka Aleksieva and Margarita Bakracheva, Enhancing Future Educators: Analysing University Teachers' Pedagogical Digital Competences and Their Role in Pre-Service Primary Teacher Training

11:40-12:00

Roumiana Peytcheva-Forsyth and Bistra Mizova, Mapping the Gaps in the Teachers’ Digital Competence: Evidences from а Self-Assessment Instrument

12:00-12:20

Blagovesna Yovkova and Roumiana Peytcheva-Forsyth, Implemented versus Declared Strategies for Pedagogical Digital Competences Development in Programmes for Future Teachers’ Preparation

12:20-12:40

Nikolina Nikolova, Temenuzhka Zafirova-Malcheva, Borislava Kirilova and Pencho Mihnev, Development of Digital Competences of Bulgarian Secondary Schools Teachers in Mathematical and ICT-Based Disciplines

Hall 1: Partial Differential Equations and Applications

Chairperson: Nedyu Popivanov

15:00-15:20

Nedyu Popivanov, Protter-Morawetz BVP for the 3-D Tricomi Equation

15:20-15:40

Makhmud Sadybekov, Nonlocal Initial-Boundary Value Problems for a Two-Dimensional Hyperbolic Equation in a Circular Cylinder

15:40-16:00

Batirkhan Turmetov, On an Initial-Boundary Value Problem for a Nonlocal Analogue of a Hyperbolic Equation

16:20-16:40

Alexander Soldatov and Nedyu Popivanov, Boundary Properties of Integrals with Homogeneous Difference Kernels

16:40-17:00

Bakytbek Koshanov, On the Solvability of the Generalized Neumann Problem for a High-Order Elliptic Equation on the Plane

Hall 1: Partial Differential Equations and Applications

Chairperson: Nedyu Popivanov

10:00-10:20

Tsvetan Hristov, Ill-posed Multidimensional BVPs for Degenerate Hyperbolic Equations of Keldysh Type

10:20-10:40

Veneta Koleva, Estimating Time-Varying Parameters in SEIRS-type Models Using Real Data

10:40-11:00

Elena Georgieva and Aleksey Nikolov, Explicit Solution of a Cauchy-Goursat Problem with Third Type Boundary Condition in a Special Case

11:00-11:20

Todor Popov, Solutions with Exponential Singularity for Protter Problems for the (3+1)-D Wave Equation

Hall 2:  Mathematical Modeling and Experiment in Physics

Chairperson: Ivan Koprinkov

10:00-10:20

Todor Arabadzhiev and Ivan Uzunov, Differential and Convolution Raman Models in the Fission of an N-Soliton State

10:20-10:40

Ivan Koprinkov, Hilbert Space Geometry Change by a Nonadiabatic Electromagnetic Field

10:40-11:00

Kristiyan Grozdev, Design, Fabrication and Characterization of a Multilayer Dielectric Mirror for a Lidar System

11:00-11:20

Aleksandar Brezhnikov and Khristo Tarnev, Effects of Coil Shape on the Electromagnetic Field Structure in ICP Discharges

11:40-12:00

Radostina Tasheva and Ivan Stefanov, Using Incomplete QPO Frequency Triplets to Constrain the Mass and Spin of the Neutron Star 4U1728-34

12:00-12:20

Lyubov Marinkova, Are There Typical Scales which Shape the High-density Part of the N-PDFs in Star-forming Clouds?

12:20-12:40

Kaloian Lozanov, Parametric Resonance and Cosmology

Hall 1: Informatics and Software Sciences

Chairperson: Roumiana Ilieva

15:00-15:20

Roumiana Ilieva and Antoni Angelov, Testing the Neural Network Technology Through a Simple Board Game - Observations and Optimization

15:20-15:40

Roumiana Ilieva and Yoto Nikolov, AI-Driven Model for Information Security, Big Data Log Processing, and Event Correlation

15:40-16:00

Alexander Radoslavov, Yordan Svezhenov, Lubomir Dimitrov and Alexander Nikov, AI-oriented Framework for User Experience Design of White Cheese Packages

16:20-16:40

Ahmed Sarwar Mohammed, Crisis Lens: A Data-Driven Approach to Identifying Overlooked Humanitarian Crises and Funding Gaps

16:40-17:00

Saad Rhorab, A Comparative Analysis of Five Econometric Models for MASI Index Forecasting: The Role of Geopolitical Risk

17:00-17:20

Viktor Glavev, Designing a Software Architecture for an AI-Driven Document Management System (AIDMS)

17:20-17:40

Ivan Ivanov and Dian Nikolov, From Coarse Categories to Fine-Grained Recognition: An Embedding-Based Approach to Few-Shot Learning

Hall 2: Topology and Geometry

Chairperson: Aleksey Nikolov

15:00-15:20

Jordan Tabov, Stanislav Stefanov, Dobrinka Milusheva-Boykina, Asen Velchev and Haim Haimov, Two Pairs Remarkable Points on the Plane of a Convex Quadrilateral

15:20-15:40

Raja Mohammad Latif, Pentapartitioned Neutrosophic Pythagorean Generalized Pre-Closed, Open, and Irresolute Mappings in Pentapartitioned Neutrosophic Pythagorean Topological Spaces

15:40-16:00

Raja Mohammad Latif, Pentapartitioned Neutrosophic Pythagorean Alpha Compact, Connected, Regular, and Normal Spaces

Hall 2:  Young Researcher Session: Applied Mathematics, Big Data and Artificial Intelligence

Chairperson: Stoyan Popov

16:20-16:40

Katerina Kostadinova, Silvia Baeva and Stoyan Popov, Binary Image Classification for Industrial Visual Inspection of Steel Surfaces

16:40-17:00

Polina Stoyanova, Silvia Baeva and Stoyan Popov, Adaptive Flicker Suppression for Temporally Consistent Video Restoration

17:00-17:20

Volen Patsev, Daniela Georgieva and Lyubomir Kovachev, Mathematical Modeling of Ultrashort Laser Pulse Propagation in a Nonlinear Medium: Self-compression and Filamentation

17:20-17:40

Nikola Vitanov, Daniela Georgieva and Lyubomir Kovachev, Mathematical Modeling of Focal Length Corrections in Thin Optical Lenses during Laser Pulse Propagation, Taking into Account the Fresnel Diffraction and Dispersion of the Medium

Hall 1: Numerical Methods and Mathematical Modeling

Chairperson: Jiří Hozman

10:00-10:20

Jiří Hozman and Tomáš Tichý, Pricing abandonment options under commodity price and salvage value uncertainties

10:20-10:40

Tsveti Hranov and Silvia Baeva, Strategic Bug Triage under Limited Developer Attention: A Game-Theoretic and Empirical Study of Assignment, Deferral, and Patch Prioritization

10:40-11:00

Silvia Baeva, Ivelina Hinova and Mirjana Kocaleva Vitanova, A Method Selection Framework for Operating-Profile Assessment and Sensitivity Analysis of DC/AC Inverters in Photovoltaic Plants

11:20-11:40

Emil Rachev, Vladislav Petrov, Dimitar Pavlov and Gergana Vacheva, Mathematical Analysis of Electromagnetic Torque Behavior in Vector-Controlled Induction Motors Under Stator Current Excitation

11:40-12:00

Yonko Stoynov, Crack Interaction in Magneto-electro-elastic Half-plane

Hall 1: Informatics and Software Sciences

Chairperson: Alexander Petkov

15:00-15:20

Lalka Stoeva and Angel Marchev, Stability-Adjusted Multi-Target Feature Selection for Banking Stress and Volatility Prediction Using Time-Blocked SHAP Analysis

15:20-15:40

Alexander Petkov, Introducing Mentorov: An Automated Programming Assignment Evaluation System with AI-Driven Formative Feedback

15:40-16:00

Preslav Tsenov and Alexander Petkov, Digitalising Administrative Sanctioning in Bulgaria: Instant Field Issuance of Penalty Notices with Integrated Payment

16:20-16:40

Emilija Velinova and Desislava Ivanova, When RTL Changes, What Breaks? An Empirical Study of Verification Environment Failures in Open-Source Hardware Development

16:40-17:00

Ivan Pirishanchin, Conceptual Model for a Generalized Online Registry for Product Tracking: A Case Study for EU-regulated Batteries

17:00-17:20

Simeon Tsvetanov, Cooperative Energy Optimization in Agricultural IoT Systems

17:20-17:40

Katia Chadarova, Innovative Process Workflow Proposal for AI Benchmarking