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We present an 180nm HV CMOS IC for concurrent neural stimulation and recording that combines 64 low-noise recording front-ends and 4 independent stimulators multiplexed to any of the 64 channels. The stimulators have 5mA peak current, 12V compliance and dynamic power management to maximize efficiency. Co-design of the stimulation and recording subsystems resulted in 100mV of recording linear range, 70nV/rtHz noise, and a rapid 1ms (single-sample) artifact recovery during stimulation.

In cases of severely damaged teeth with limited coronal tooth structure and remaining hard dental tissues subgingivally, a custom‐made post‐and‐core restoration is required. Teeth with non‐circular canal space also require this type of restoration because the build‐up with pre‐fabricated posts could lead to thick cement layer. The development of CAD/CAM technologies widens the range of the materials that can be used for prosthetic restorations. Along with base dental alloys, newly developed materials may be applied. The aim of the article is to present four clinical cases of severely damaged teeth which utilize different materials and different production techniques for custom post‐and‐core fabrication. In the first clinical case, a metal post‐and‐core restoration was fabricated by direct metal laser sintering. In the second clinical case, digital technologies were used to produce a 3D‐printed resin prototype for further investing and casting from base metal dental alloy. In the third clinical case, fibre‐reinforced composite was used for fabrication of the custom post‐and‐core by milling. In the fourth clinical case, the restoration is produced by milling of lithium disilicate ceramics IPS emax CAD (Ivoclar Vivadent, Lichtenstein). The bond between the fibre‐reinforced composite post‐and‐core and the hard dental tissues offered possibility to compensate—to some extent—the shape of the preparation which was not optimal. CAD/CAM technologies applied in these clinical cases provided combination of high accuracy of fitting with good stability and individual shape of the restorations. © 2023 Australian Dental Association. [ABSTRACT FROM AUTHOR]

The natural variability of regional climatic conditions poses certain difficulties in detecting global climate change at a local scale. The question about the ratio between the contribution of human forcing, induced by the increase in atmospheric carbon dioxide concentration, and the contribution of natural variability in atmospheric and oceanic circulation arises in each particular case. The purpose of the study reported in this article was to evaluate the contribution of the North Atlantic Oscillation to the decrease in the climate continentality of Moscow during the period of 1951–2000. The results show that a significant part of the decrease in continentality could be attributed to the increase in the North Atlantic Oscillation index observed during this period. [ABSTRACT FROM AUTHOR]

The heteronuclear complex [Fe4Li2(O)2(Piv)10(H2O)2] (1, Piv is the pivalic acid anion) was obtained by refluxing FeIII pivalates with LiI pivalates in toluene and isolated as the 1•PhCH3 solvate with a toluene molecule. According to X-ray diffraction data, complex 1 contains the {Fe4Li2O2} core. The Mössbauer spectroscopy data indicate that the core comprises para magnetic FeIII ions in the high-spin state located in the symmetric octahedral environment of oxygen atoms. Thermolysis of 1 studied by simultaneous thermal analysis demonstrated thermal stability of the complex up to 225 °С. The main end product of thermolysis at 600 °С is the mixed oxide LiFe5O8. [ABSTRACT FROM AUTHOR]

The basis of this research consists of conceptual developments of a methodological nature that allow one to diagnose and assess the limitations, threats and challenges of an economic, social, environmental, resource-technical, administrative and legal nature across the vertical of the economic levels of an integral national system. The purpose of the paper is to formulate an original methodological approach to the research of economic security, considering the causal connection between the elements of the totality of individual determinants and conditions characterizing threats and challenges. The peculiarity of the proposed approach lies in the fact that the authors consider the enterprise as the initial level of the economic system. The economic security of an enterprise largely determines the economic security of other levels of this system. They represent the business environment that can be a carrier of external threats that negatively affect the economic security of the enterprise. We believe that without ensuring economic security at all levels of the economic hierarchy, it is impossible to ensure the implementation of the concept of sustainable development. The use of the matrix principle justifiably allows the authors to solve the evaluation problem within a single methodological approach. It allows identifying the determinants that most affect economic security. It is assumed that the diagnostic results will allow developing specific measures to eliminate or reduce the role of negative factors and motivational and stimulating measures that ensure the resolution of contradictions arising from the presence of restrictions, including environmental and social, on entrepreneurial activity.