Welcome Address by the Director of MLIT

• Sergei Shmatov (JINR)

Room: MLIT-134/5-* - Conference Hall

Welcome Address by the Deputy Director of MLIT

• Дмитрий Подгайный (JINR)

Room: MLIT-134/5-* - Conference Hall

The Govorun supercomputer for JINR tasks

• Максим Зуев (MLIT JINR)

Room: MLIT-134/5-* - Conference Hall The heterogeneous computing platform HybriLIT is a multi-component system consisting of the “Govorun” supercomputer, a training and testing polygon, networked data storage systems, and a set of specialized services. The platform is designed for application development, high-performance computing, data processing, and data storage. The presentation will provide an overview of the software and information environment of the HybriLIT Heterogeneous Computing Platform and the specialized services used to address JINR’s scientific and applied tasks.

Working on the HybriLIT heterogeneous platform

• Дмитрий Беляков (MLIT JINR)

Room: MLIT-134/5-* - Conference Hall TBD

ML/DL/HPC ecosystem for solving applied tasks

• Оксана Стрельцова (JINR)

Room: MLIT-134/5-* - Conference Hall The presentation will showcase the capabilities of the ecosystem deployed on the HybriLIT platform for developing algorithms based on machine learning and deep learning methods, data annotation, service deployment, and more.

HLIT-VDI for working with proprietary software

• Mikhail Matveyev (JINR)

Room: MLIT-134/5-* - Conference Hall TBD

How to become a user of the HybriLIT Heterogeneous Platform

• Shushanik Torosyan (LIT)
• Маргарит Киракосян (LIT)
• Мария Любимова

Room: MLIT-134/5-* - Conference Hall The HybriLIT platform is part of the Multifunctional Information and Computing Complex of the JINR Laboratory of Information Technologies. It includes the “Govorun” supercomputer and a training and testing cluster designed for developing and running high-performance parallel applications. The presentation provides a step-by-step guide on how to gain access to HybriLIT resources, including registration, initial authorization, SSH connection procedures for Linux and Windows users, as well as specifics of working with graphical applications. Participants will also learn how to request access to the “Govorun” supercomputer and what services are available within the HybriLIT ecosystem.

Comparative DFT Study of Adsorption of Superheavy Elements Cn and Fl, and Their Lighter Homologs Hg and Pb on Selenium Surface

• Dipayan Sen (Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research)

Room: MLIT-134/5-* - Conference Hall In this computational study, we investigate the adsorption of superheavy elements Copernicium (Cn) and Flerovium (Fl), and their lighter homologs Mercury (Hg) and Lead (Pb), on a Selenium (100) surface. Our approach employs periodic Density Functional Theory (DFT) in Quantum ESPRESSO (open-source suite of codes)with spin-orbit coupling and DFT-D4 dispersion correction. Our resultsshow that while a standard Perdew-Burke Ernzerhof (PBE) setup (functional and pseudopotential) captures the correct adsorption trend, a hybrid approach using the Perdew-Burke- Ernzerhof for solids (PBEsol) functional with PBEsol pseudopotentials for Se and PBE pseudopotentials for the adsorbates provides superior accuracy for adsorption energy values. We further probed the adsorbate- surface interactions and stability through density of states, charge transfer, and vibrational analysis.

Computational Molecular Physics at Work

• Мирослав Ильяш (BLTP JINR)

Room: MLIT-134/5-* - Conference Hall I'll give a brief overview of computational molecular physics (CMP) techniques in my talk. They fall into two groups: Molecular Mechanics (MM) and Quantum Mechanics (QM). MM approaches use predefined analytical interatomic potentials, whereas QM approaches rely on an approximate solution of the many-electron Schrödinger equation. Likewise I'll describe few open-source CMP applications that Govorun users can utilize for their scientific work at JINR.

TUTORIAL: Computational Molecular Physics

• Мирослав Ильяш (BLTP JINR)

Room: MLIT-134/5-* - Conference Hall Computational Molecular Physics hands-on-execercises are available at: [HybriLIT-workshop-2025-materials][1] [1]: http://github.com/miroi/HybriLIT-workshop-2025

Training neural networks in PyTorch on HybriLIT GPUs

• Константин Чижов (MLIT)

Room: MLIT-134/5-* - Conference Hall The presentation demonstrates how the GPU resources of the HybriLIT platform at the JINR Laboratory of Information Technologies are used for deep learning models. It covers the organization of a virtual working environment and the installation of PyTorch with CUDA support. As an example, results are shown for computations using the State-Space Model (Mamba) architecture applied to tabular data.

Monte Carlo simulation in Geant4 for complex models on the Govorun supercomputer

• Константин Чижов (MLIT)

Room: MLIT-134/5-* - Conference Hall Monte Carlo simulation in Geant4 is a highly resource-intensive process. The presentation introduces the experience of computing a complex model using the resources of the “Govorun” supercomputer and discusses aspects of running jobs through the SLURM scheduler as well as error handling.

Automated quantification of DNA repair foci in response to ionizing radiation

• Sara Shadmehri

Room: MLIT-134/5-* - Conference Hall Ionizing radiation induces a variety of DNA lesions, including DNA double-strand breaks (DSBs), which are among the most challenging to repair. The formation of these lesions initiates a cascade of DNA repair protein recruitment, leading to the formation of radiation-induced foci (RIF). To automate the RIF analysis, we have followed a deep learning approach which consists of two stages; first a pretrained neural network called SAM2 is used to detect the cell nuclei in the fluorescent image, then the trained neural network YOLO on our foci-annotated data is used to detect RIF within each nucleus. Following RIF detection and individual image preprocessing on each focus location, the colocalized number of the two foci are calculated. Based on this model, we developed a web service on WRITER Framework for the automated RIF detection and quantification of object-based colocalization between two RIF populations. The web service MOSTLIT allows the user to observe the identified cell nuclei in an uploaded fluorescent image, choose the desired nuclei, automatically get the marked foci and obtain the numerical characteristics such as the number of RIF per cell, RIF area and colocalizations.

A platform for working with medical data

• Anastasia Anikina (MLIT, JINR)

Room: MLIT-134/5-* - Conference Hall TBD

Approaches to accelerating computations in Python

• Adiba Rahmonova (Joint Institute for Nuclear Research)

Room: MLIT-134/5-* - Conference Hall The presentation will cover the main approaches to accelerating computations in Python. Special attention is given to the NumPy library, which provides efficient array operations and significantly improves performance. The use of the Numba JIT compiler is also discussed, enabling faster function execution by compiling them into machine code. To increase performance on multicore systems, CPU parallelism is introduced through the Joblib library, which simplifies task parallelization. In addition, the presentation explores the use of GPUs for computation with CuPy and Numba CUDA, allowing substantial reductions in processing time for large datasets. The Jupyter Book tool is also presented as a way to create interactive electronic books based on Jupyter Notebook, combining text, code, visualizations, and computations into a user-friendly format.

Capabilities of the Hybrilit Platform for Simulating Quantum-Classical Optimization Algorithms

• Алла Боголюбская (JINR, Dubna)
• Denis Yanovich (senior researcher)
• Yuri Palii (MLIT, JINR)

Room: MLIT-134/5-* - Conference Hall Quantum Approximate Optimization Algorithm (QAOA) simulations were performed on the Hybrilit quantum testbed at JINR. The testbed infrastructure is well suited for such research: significant computational resources are available, including multi-core CPUs, GPUs, and RAM; JupyterHub, as well as quantum simulators Cirq, Qiskit, qsim, and other are deployed. The problem of finding the ground state of the Ising model with a longitudinal magnetic field was solved for two- and three-dimensional lattices of various sizes. Quantum circuits with registers of up to 27 qubits were investigated. Optimization of variational ansatz parameters was carried out using both gradient-based and gradient-free methods. The processes and results of optimization performed by different methods were compared across several parameters. The dependence of computational efficiency on the configuration of used computational resources was demonstrated.

TUTORIAL: ML/DL/HPC ecosystem for solving applied tasks

• Оксана Стрельцова (JINR)
• Максим Зуев (MLIT JINR)
• Adiba Rahmonova (Joint Institute for Nuclear Research)
• Sara Shadmehri
• Дмитрий Подгайный (JINR)
• Илхом Рахмонов (BLTP, Joint Institute for Nuclear Research)

Room: MLIT-134/5-* - Conference Hall The presentation will showcase the capabilities of the ecosystem deployed on the HybriLIT platform for developing algorithms based on machine learning and deep learning methods, data annotation, service deployment, and more. **The work was performed with the support of the Russian Science Foundation within the framework of project No. 22-71-10022** Совместный редактор кода [hedgedoc.jinr.ru](http://hedgedoc.jinr.ru:3000/ywd2_mELT8m0FBBpFbo6Ug?view)

TUTORIAL: Scientific computing and the development of parallel algorithms using the Julia programming language

• Maksim Bashashin (Laboratory of Information Technologies, JINR)
• Mikhail Matveyev (JINR)

Room: MLIT-134/5-* - Conference Hall This master class demonstrates the potential of the Julia programming language for exploring multiparameter models described by systems of nonlinear differential equations. A model of a point φ0 Josephson junction of the superconductor-ferromagnet-superconductor type with a direct relationship between the magnetic moment and the Josephson current is considered as an example. A methodology for preparing a problem for calculations, the specifics of numerically solving systems of equations, and the capabilities of the Julia language for implementing parallel computations for calculating magnetic moment flip domains over a wide range of parameters are presented.