St Petersburg University

Mechanical properties and fracture failure characteristics of fractured limestone under coupled freeze-thaw and cyclic loading

<title>Abstract</title> The Central Asian Orogenic Belt possesses abundant mineral resources. As mining activities extend into high-altitude cold regions, the safety and stability of rock engineering projects, such as open-pit mine slopes, have become increasingly prominent. This...

The industry–energy–population triple transformation and its pathways to environmental sustainability

With global climate action lagging behind and record-breaking heat waves occurring with increasing frequency, China’s role in achieving the temperature control targets of the Paris Agreement has become increasingly critical. As the world’s largest carbon emitter, the pace, trajec...

The Influence of Spatial Location and Object Shape on Learning and Re-Learning Spatial Tasks in Dopamine Transporter-Deficient Rats

Background: The role of dopamine in brain functions has been well established, and dopamine imbalances can cause problems in working memory and spatial learning. The dopamine transporter (DAT) plays a significant role in dopamine regulation. Rats with a knockout of the dopamine t...

Species of the Genus ×Agrotrigia (Hordeeae, Poaceae)—A Case of a Different Pattern of Parental rDNA Elimination

All taxa of plants have undergone several rounds of whole-genome duplication (WGD), accompanying interspecific and intergeneric crosses; subsequently, some part of one or both parent genomes in hybrid plants can be eliminated. The objective of this study was to evaluate the relat...

Blockchain-Enabled Central Bank Digital Currency: Technological Architecture, Privacy, and Institutional Design

This paper develops an analytical framework for the joint design of central bank digital currency (CBDC) and its underlying ledger architecture. We treat a digital monetary system as a tuple M = (S, R, C, I)—supply state, rule set, circulation parameters, and incentive structure—...

NEXAFS and XPS and Structural, Electrical and Thermal Properties of Zn and Ni Codoped Bismuth Antimonate Pyrochlore

The crystal structure and physicochemical properties of a new Ni/Zn codoped bismuth antimonite pyrochlore, synthesized by the solid-phase reaction method, were investigated. The most optimal outcomes of Rietveld refinement for Bi2.7Zn0.46Ni0.70Sb2O10+Δ were achieved for the model...

Mixed Multilayersof Protein Fibrils with Sodium orCalcium Alginates

Abstract A layer-by-layer approach is used for the preparation of multilayer films on the basis of biomacromolecules and their aggregates, protein fibrils. In this work, the fibrils were prepared from β-lactoglobulin and oat globulin, while sodium and calcium alginates were used...

The World Psychiatric Association (WPA) Guideline on Schizophrenia Spectrum Disorders Management for Low- and Middle-Income Countries

There is a pressing need to address the unique challenges of managing Schizophrenia Spectrum Disorders (SSD) in Low- and Middle-Income Countries (LMICs), where mental health resources are scarce and unevenly distributed. To develop this evidence-based guideline, we conducted a sy...

Comparative study of the efficacy and safety of Ranquilon and Afobazol in the treatment of patients with anxiety associated with neurasthenia and adjustment disorders. (Results of an open, randomized, multicenter, phase IV clinical study)

Objective. To evaluate the efficacy and safety of Ranquilon1 at 6 mg daily, compared with Afobazol (fabomotizole) at 30 mg daily, for the treatment of patients with anxiety associated with neurasthenia and adjustment disorders. Material and methods. The clinical study included 20...

Cranioscopic methods for determining human sex using the skull

The aim of this study was to systematize modern craniological methods for determining sex using the skull and evaluate their diagnostic effectiveness, taking into account the introduction of digital technologies and machine learning methods. Classical morphoscopic approaches (V.N...