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Presenting stories which represent each layer of the city of Moscow, from the centre of power to the outer rings of desolate estates and tumbledown shacks, this fascinating collection offers a lively and varied portrait in fiction of Russia's mysterious capital city. The collection includes works by Russian authors ranging from Anton Chekhov and Yuri Koval to Larisa Miller and Marina Boroditskaia, collating nineteeth- and twentieth-century tales, as well those written by contemporary authors. The stories are intriguingly varied - an account of life in the city's infamous high security prison, a tale of a lady with a supernatural gift for repairing household devices, the story of another pitiful lost dog who nearly joins the Moscow Circus - and together they shed light on the changing nature of Moscow society across the centuries. The next instalment in a series of successful translated anthologies of stories set in and around a particular European City. Moscow Tales combines two genres, travel writing and literary fiction and provides an insight into the lives of those who live in Moscow or have written about it.

We study applications of the connection between the partition functions of the Potts models and Tutte polynomials: it is demonstrated how the Kramers–Wannier duality can be derived from the Tutte duality. Using the “contraction–elimination” relation and the Biggs formalism, we derive the high-temperature expansion and discuss possible methods for generalizing the Kramers–Wannier duality to models on nonplanar graphs.

Nuclear laser spectroscopy at the 10 −12 precision level (Nature 633.8028 (2024): 63–70) determined the fractional change in the nuclear quadrupole moment of 229 Th upon excitation, Δ Q 0 / Q 0  = 1.791(2)%. Such high-accuracy nuclear parameters enable stringent tests and refinement of 229 Th nuclear models. Using a semi-classical prolate-spheroid model, we quantify the transition frequency’s sensitivity to fine-structure constant variations as K  = 5900(2300), with uncertainty dominated by the measured charge-radius change Δ〈 r 2 〉. This supports the predicted higher α -sensitivity of nuclear clocks over atomic clocks, important for new-physics searches. We find Δ Q 0 strongly dependent on nuclear volume, challenging the constant-volume approximation. The deviation between measured and predicted Δ Q 0 / Q 0 underlines the need for improved modeling and measurement of additional nuclear parameters. We explicitly assess the octupole contribution to α -sensitivity. The authors report on new developments on the sensitivity of the nuclear clock transition in Th229 for new physics searches involving variations of the fine-structure constant. This highlights the need for developing of advanced nuclear models and parameter searches relating to experimental measurements.

In this work, we propose a scenario of appearance of mixed dynamics in reversible two-dimensional diffeomorphisms. A jump-like increase in the sizes of the strange attractor and strange repeller, which is due to the heteroclinic intersections of the invariant manifolds of the saddle points belonging to the attractor and the repeller, is the key point of the scenario. Such heteroclinic intersections appear immediately after the collisions of the strange attractor and the strange repeller with the boundaries of their attraction and repulsion basins, respectively, after which the attractor and the repeller intersect. Then the dissipative chaotic dynamics related to the existence of the mutually separable strange attractor and strange repeller immediately becomes mixed when the attractor and the repeller are essentially inseparable. The possibility of realizing the proposed scenario is demonstrated using a well-known problem of the rigid-body dynamics, namely, the nonholonomic model of the Suslov top.

Optical atomic clocks 1 , 2 use electronic energy levels to precisely keep track of time. A clock based on nuclear energy levels promises a next-generation platform for precision metrology and fundamental physics studies. Thorium-229 nuclei exhibit a uniquely low-energy nuclear transition within reach of state-of-the-art vacuum ultraviolet (VUV) laser light sources and have, therefore, been proposed for construction of a nuclear clock 3 , 4 . However, quantum-state-resolved spectroscopy of the 229m Th isomer to determine the underlying nuclear structure and establish a direct frequency connection with existing atomic clocks has yet to be performed. Here, we use a VUV frequency comb to directly excite the narrow 229 Th nuclear clock transition in a solid-state CaF 2 host material and determine the absolute transition frequency. We stabilize the fundamental frequency comb to the JILA 87 Sr clock 2 and coherently upconvert the fundamental to its seventh harmonic in the VUV range by using a femtosecond enhancement cavity. This VUV comb establishes a frequency link between nuclear and electronic energy levels and allows us to directly measure the frequency ratio of the 229 Th nuclear clock transition and the 87 Sr atomic clock. We also precisely measure the nuclear quadrupole splittings and extract intrinsic properties of the isomer. These results mark the start of nuclear-based solid-state optical clocks and demonstrate the first comparison, to our knowledge, of nuclear and atomic clocks for fundamental physics studies. This work represents a confluence of precision metrology, ultrafast strong-field physics, nuclear physics and fundamental physics. A vacuum ultraviolet frequency comb is used to directly excite the narrow 229 Th nuclear clock transition in a solid-state CaF 2 host material, marking the start of nuclear-based solid-state optical clocks.

The ability to accurately quantify all the microRNAs (miRNAs) in a sample is important for understanding miRNA biology and for development of new biomarkers and therapeutic targets. We develop a new method for preparing miRNA sequencing libraries, RealSeq®-AC, that involves ligating the miRNAs with a single adapter and circularizing the ligation products. When compared to other methods, RealSeq®-AC provides greatly reduced miRNA sequencing bias and allows the identification of the largest variety of miRNAs in biological samples. This reduced bias also allows robust quantification of miRNAs present in samples across a wide range of RNA input levels.

This paper is about the use of tools of spatial analysis for assessing the natural conditions for recreational tourism in the mountains of Tashkent region. For this study maps of topography, landscape, and risks of avalanches are recompiled for the development of the database. Assessment is based on accepted criteria for evaluating the capacity of the region for recreational tourism. According to these criteria, the spatial analysis procedures were carried out. The general scheme of the GIS-based evaluation process is developed and tested. As the result of spatial assessment 5 major zones were identified. The result of the spatial analysis is the map that defines the spatial extent of suitable areas for short-term recreational tourism.

The relationship between the critical temperature of spontaneous ignition, calculated using the maximum heat of explosion and the kinetic parameters (activation energy and pre-exponential factor) of the decomposition reaction in the liquid phase, and the sensitivity index h 50 is analyzed for a set of substances representing all major classes of explosive compounds. It is demonstrated that the derived correlation equation can be used to predict the sensitivity of new compounds. The relationship between the sensitivity of the compounds and their molecular structure is also analyzed.

Small-angle X-ray scattering (SAXS) and Fourier transform infrared (FTIR) spectroscopy were used to investigate structural peculiarities of two types of amyloid aggregates of smooth muscle titin, which differed in their morphology and ability to disaggregate, and differently bound thioflavin T dye. SAXS showed that the structure/shape of the two titin aggregate types was close to a flat shape. FTIR spectroscopy revealed no differences in the secondary structure of the two types. These data suggest that both types of “flat-shape” titin aggregates are identical in their secondary structure and, as shown previously, have a quaternary cross-β structure. An assumption was made that the most stable supramolecular complexes of a cross-β structure, which do not differ in their secondary structure, formed first during the aggregation of smooth muscle titin. Then, depending on ambient conditions, these supramolecular structures could form titin aggregates of different morphology and properties.

The null field method (NFM) has been applied successfully to Laplace’s equation in circular/elliptic domains with multiple circular/elliptic holes. There are many papers published; but no strict error analysis exists so far. In this paper, we describe the NFM as the Galerkin methods involving the trapezoidal rule. For the NFM, the pseudo-boundaries can be just located on the domain boundary ; this is the most intriguing and important characteristic in applications. In such a case, the error bounds are derived for the Dirichlet problems. Polynomial convergence rates are obtained, and exponential convergence rates can be achieved for infinite smooth solutions. Although the error analysis in this paper is made for the source nodes on , it can be extended for the source nodes outside . The error analysis in this paper is essential to the NFM because it provides some important theoretical foundation, thus to enhance its application.