Abstract
The article examines the influence of architectural traditions of historical wooden housing construction on wooden structures created by contemporary American architects in three regions of ...the United States. Architect Charles Moore and his MLTV architecture studio in San Francisco began using wood as the main building material for houses in the experimental ecological and creative community Sea Ranch in the early 1960s. Charles Moore used wooden structures in buildings and developed a general space-planning design of buildings in a classical modernism style. Architect Peter Forbes from Boston, Massachusetts (New England) used wood following the New England tradition of wooden housing construction dating back to the 17th century. Architects Elizabeth Plater-Zyberk and Andres Duany from Miami, Florida (the Deep American South) used the architectural heritage of the American South. On the basis of the southern architectural school of wooden housing construction, which developed under the influence of the hot and humid climate in the 18th-19th centuries, the method of creating small settlements using wood was developed and applied in urban planning. The article concludes that modern American architects consider wood to be a modern building material and use wooden structures in different applications in buildings. Wooden structures are widely used in the regions where original schools of wood construction were created 100 - 300 years ago.
The article describes the advanced experience of the USA which have been developing investment zones in modernizing the economy and the planning structure of cities using the example of Chattanooga ...(Tennessee). The initial state of the economic and social decline of Chattanooga in the early 1980s is described. The results of the analysis of social groups that initiated the process of modernization of the urban economy in the first half of the 1980s are presented. The importance and role of urban planning and new land management policies implemented in Chattanooga are identified. The initial and strategic aspects of the economic growth which have become drivers of the urban development are identified. The role and importance of tourism, new tourist attractions and a new network of natural parks, which became the basis for the tourist flow at the national level, are described. The types of new investment zones are determined and their connection with the development of the planning framework of the city is described.
ABSTRACT
We present the first sample of tidal disruption events (TDEs) discovered during the SRG all-sky survey. These 13 events were selected among X-ray transients detected in the 0° < l < 180° ...hemisphere by eROSITA during its second sky survey (2020 June 10 to December 14) and confirmed by optical follow-up observations. The most distant event occurred at z = 0.581. One TDE continued to brighten at least 6 months. The X-ray spectra are consistent with nearly critical accretion on to black holes of a few ×103 to $10^8\, \mathrm{ M}_\odot$, although supercritical accretion is possibly taking place. In two TDEs, a spectral hardening is observed 6 months after the discovery. Four TDEs showed an optical brightening apart from the X-ray outburst. The other nine TDEs demonstrate no optical activity. All 13 TDEs are optically faint, with Lg/LX < 0.3 (Lg and LX being the g band and 0.2–6 keV luminosity, respectively). We have constructed a TDE X-ray luminosity function, which can be fit by a power law with a slope of −0.6 ± 0.2, similar to the trend observed for optically selected TDEs. The total rate is estimated at (1.1 ± 0.5) × 10−5 TDEs per galaxy per year, an order of magnitude lower than inferred from optical studies. This suggests that X-ray bright events constitute a minority of TDEs, consistent with models predicting that X-rays can only be observed from directions close to the axis of a thick accretion disc formed from the stellar debris. Our TDE detection threshold can be lowered by a factor of ∼2, which should allow a detection of ∼700 TDEs by the end of the SRG survey.
The locus of extrema (ridges) for heat capacity, thermal expansion coefficient, compressibility, and density fluctuations for model particle systems with Lennard-Jones (LJ) potential in the ...supercritical region have been obtained. It was found that the ridges for different thermodynamic values virtually merge into a single Widom line at T < 1.1T c and P < 1.5P c and become practically completely smeared at T < 2.5T c and P < 10P c, where T c and P c are the critical temperature and pressure. The ridge for heat capacity approaches close to critical isochore, whereas the lines of extrema for other values correspond to density decrease. The lines corresponding to the supercritical maxima for argon and neon are in good agreement with the computer simulation data for LJ fluid. The behavior of the ridges for LJ fluid, in turn, is close to that for the supercritical van der Waals fluid, which is indicative of a fairly universal behavior of the Widom line for a liquid–gas transition.
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The article is devoted to the problem of using artificial neural networks to assess the risk of developing emergencies during the operation of lifting crane equipment. The data sources are telemetric ...measurements from microcontroller load limiters, as well as data from technical and daily inspections of equipment condition, in the last case the data may be fuzzy.
Recently, we have proposed a new dynamic line on the phase diagram in the supercritical region, the Frenkel line. Crossing the line corresponds to the radical changes of system properties. Here, we ...focus on the dynamics of model Lennard-Jones and soft-sphere fluids. We show that the location of the line can be rigorously and quantitatively established on the basis of the velocity autocorrelation function (VAF) and mean-square displacements. VAF is oscillatory below the line at low temperature, and is monotonically decreasing above the line at high temperature. Using this criterion, we show that the crossover of particle dynamics and key liquid properties occur on the same line. We also show that positive sound dispersion disappears in the vicinity of the line in both systems. We further demonstrate that the dynamic line bears no relationship to the existence of the critical point. Finally, we find that the region of existence of liquidlike dynamics narrows with the increase of the exponent of the repulsive part of interatomic potential.
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An algorithm for obtaining the Chaundy-Bullard identity for a vector partition function with weight that uses computer algebra methods is proposed. To automate this process in Maple, an algorithm was ...developed and implemented that calculates the values of the vector partition function with weight by finding non-negative solutions of systems of linear Diophantine equations that are used to form the identities involved. The algorithm’s input data is represented by the set of integer vectors that form a pointed lattice cone and by some point from this cone, and the Chaundy-Bullard identity for the vector partition function with weight is its output. The code involved is stored in the depository and is ready-to-use. An example demonstrating the algorithm’s operation is given.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
The article is devoted to the neural network construction that uses as input information the time domain response data of layered structure to diagnostic punch-load and represents the tool for the ...layers' elastic properties reconstruction along the corresponding thickness coordinates.
Abstract
The article sets the task of classifying various materials and determining their belonging to a specified group using a recurrent neural network. The practical significance of the article is ...to obtain the results of the neural network, confirming the possibility of classifying materials by the hardness parameter using a neural network. As part of the study, a number of experimental measurements were carried out. The structure of the neural network and its main components are described. The statistical parameters of the experimental data are estimated.
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