National Research Tomsk State University

Numerical analysis of the breast thermal state under an influence of an intratissue malignant neoplasm

Purpose The purpose of this study is to develop the mathematical model of the thermal nature of the breast having an intratissue malignant neoplasm. Design/methodology/approach The mathematical model is based on a modified Pennes bioheat equation and defines a five-layer structur...

Diaphragmatic crus thickness as a marker of dysfunction and predictor of myasthenic crisis after thymectomy in generalized myasthenia

Myasthenia gravis (MG) is an autoimmune disorder characterized by impaired neuromuscular transmission. This can lead to respiratory failure in case of myasthenic crisis. While thymectomy is a recognized treatment, it carries a high risk of postoperative myasthenic crisis (POMC)....

Study of the Stability of Parameters of Red-Range Semiconductor Laser Emitters for Fiber-Optic Sensors of Monitoring Systems

The study is aimed at selecting low-cost semiconductor laser emitters for fiber-optic sensors of systems that monitor the technical condition of mine workings, open pits and monolithic building structures. One specimen of each of the three commercial red laser emitters used in vi...

Noncovalent Interactions Surrounding Polyoxometalates: From Chemistry to Materials Applications

Polyoxometalates (POM) are one of the areas of inorganic chemistry that is actively developing due to the broad application of POM‐based materials in the emerging areas of modern science and technology. POMs are a huge family of oxocomplexes distinguished by specific intrinsic pr...

Technical efficiency and firm profitability in Russian manufacturing: leverage, firm age and two-stage DEA evidence

Purpose This study aims to examine when technical efficiency leads to firm profitability. Prior research reports mixed efficiency–performance evidence; the authors argue that this relationship is nonlinear and conditioned by firms’ ability to capture value from efficiency gains....

Advanced technologies and materials for hydrogen production from glucose: A review of current strategies

Glucose, the most abundant monosaccharide derived from biomass, is a promising feedstock for sustainable hydrogen production. This review critically evaluates advanced thermochemical, photocatalytic, electrochemical, and biological strategies for glucose-to-hydrogen conversion. W...

The Psychometric Properties of General Mattering Scale, Anti-Mattering Scale, and Fear of Not Mattering Inventory and the Association With Loneliness Among Iranian Students

Mattering is an important psychosocial construct, yet evidence regarding the psychometric properties of mattering measures among Iranian university students remains limited. This study examined the psychometric properties of three mattering scales and their associations with lone...

Estimation of the Risk of Asteroid Impact with the Earth Using the Initial Confidence Density

Abstract A method has been developed for compressing part of the cloud of virtual trajectories of an asteroid. The method is based on the use of a probability density defined in the confidence region of the initial motion parameters. The method is designed to increase the number...

Sensitivity of Flow Harmonics to the Equation of State of Strongly Interacting Matter in Heavy-Ion Collisions at Nuclotron-NICA Energies

The main goal of beam energy scan programs in heavy-ion collisions is to investigate the equation of state (EoS) and explore possible phase transitions in strongly interacting matter. Anisotropic flow, quantified from the azimuthal distributions of produced particles, is a key ob...

Mid Holocene ecosystem peak and late Holocene shift to littoral refugia in an arid Altai lake: non-pollen palynomorph record

This study reconstructs the local environmental conditions of Lake Tarkhata (Altai Mountains) during the Middle and Late Holocene based on the analysis of non-pollen palynomorphs preserved in lacustrine sediments. A total of approximately 60 NPP morphotypes were identified, inclu...

Migration of Vapor Molecules in Soils

Molecular transport of low-volatility organic vapors through unsaturated porous media is governed by the coupled effects of diffusion, sorption, and pore structure, yet the relative roles of these processes remain insufficiently quantified. In this work, we develop a physics-base...

Biogeochemical Impact of Thermal Abrasion of Frozen Rocks on the Arctic Coast

The biogeochemical consequences of the destruction of permafrost horizons due to thermal abrasion of coastal cliffs was assessed for the Mamontovyi Khayata outcrop (Bykovsky Peninsula, Northern Yakutia). The study employed an ecosystem-based approach, which included characterizin...

Advanced materials processing and non-destructive evaluation for next-generation hydrogen storage systems: A review of protective coatings, membranes, and composite structures

The transition to a hydrogen-based economy critically depends on the development of safe, efficient, and durable storage systems. However, practical implementation of metal hydride beds and Type IV composite vessels faces three critical challenges: surface degradation and poisoni...

Optimal sequential change-point detection for Markov models under probability criteria over short time intervals

In this paper, we study sequential change detection problems in the Bayesian framework under the probability delay risk according to which the detection goal is to minimize the probability that the detection delay will exceed some admissible delay level. To do this, we represent...

Poisson gauge theories in three dimensions: exact solutions and conservation laws

Abstract We investigate Maxwell–Chern–Simons theory on a three-dimensional noncommutative spacetime endowed with a constant Poisson structure. By exploiting the residual rotational symmetry, we construct exact classical solutions corresponding to pointlike electric and magnetic c...

Design, Synthesis,and Evaluation of Alkoxyamine AnticancerProdrugs Bearing Galactoside as an Enzyme-Activated Trigger

Abstract Enzyme-induced cytotoxicity can be considered the main challenge in modern cancer therapy that provides unique opportunities for targeted apoptosis. To address this challenge, we implemented enzyme-triggered activation of alkoxyamine–galactose conjugates with the formati...

Artificial-Lift System Control: A Reduced-Order Transient Model for Real-Time Predictive Control of Electrical Submersible Pump Wells

Unstable well operations, driven by reservoir depletion, high gas–oil ratios, unstable inflow, and surface network interactions, have become a major challenge in modern production — especially in Western Siberian fields — causing flow instabilities and production losses. While nu...

Quasi-Experimental Field Assessment of Haul-Road Maintenance Effects on Fuel Consumption, Cycle Time and Mechanical Loading of Open-Pit Dump Trucks

Haul-road condition in open-pit mining affects fuel consumption, transport-cycle throughput and dump-truck mechanical loading. This study conducted a quasi-experimental field assessment of local maintenance effects on severely degraded road segments. The full cycle register conta...