The Twentieth-Century Urals Economy in Historical Perspective

The article discusses major works on economic history published by Urals scholars over the past few decades and outlines the main stages of their research development. The analysis of these works leads to the theoretical conclusion that there has been a recent upsurge in the scholarly interest in economic history. This trend is related to the multimethodological approach gaining popularity among these scholars and the two disciplines, economics and history, drawing closer together. There is a popular belief that history can prove useful to any economist as a storage of economic facts tested by life itself and as a collection of various economic experiments. History, however, is also very important as a source of economic ideas. Thus, there is a process of genuine ‘cross-disciplinary communication’, which manifests itself in economists and historians’ exchanging theories developed within the framework of their disciplines. In its modern stage, the economic history of the Urals focuses on the problems which were not previously covered by historical studies for a number of objective reasons: some sources were classified and unavailable due to security control; and some topics were considered inappropriate to raise in studies of national history. Historians have now turned to such questions as the creation and development of industry-specific territorial production complexes, which used to be predominantly studied by economists. Nowadays, economic history discovers new topics for research, expands its database of sources, applies diverse methodology, and uses conceptual approaches and methods developed both by Russian and foreign economists

Postmodern Alternative to ‘Mainstream’ in Historical Science of the Urals in the 1990s–2000s

This article discusses general trends in the development of the historical science of the Urals in the post-Soviet period. Features of the main fields of historical researches are characterized and the existence of such phenomenon as ‘retromania’ in the official historical science is explored. The article also examines the influence of the postmodern model of historical research on historians of the Urals and adherents of this model in theory, methodology and scientific issues. The article concludes that the postmodern model of historical research possesses every feature of scientific research. Despite some negative traits (such as relativism as related to certain methodological issues and overly free use of terminology), it provides benefits by expanding the arsenal of theoretical concepts and especially the methods of historical research available to a contemporary historian. Thanks to this expansion, new research issues has been explored, new problems have been raised, and new approaches to traditional historical problems have been enabled. There has been a significant expansion of the scientific research issues, completely new problems have been raised, and approaches to the study of traditional problems have changed. Keywords: the Urals, historical science, retromania, mainstream, postmodern model of historical research

Historiography of the History of the Ural CHEKA (1918–1922)

Проанализирована степень изученности истории создания и реформирования органов ЧК на Урале. Выделено два периода в ее изучении: советский и постсоветский. Показано влияние идеологии на оценки исследователей.The paper analyses historiography of establishment and reform of the Cheka in the Urals. The author distinguishes two periods in study of history of the Cheka: Soviet and post-Soviet. The paper also shows influence of ideology on assessments of historians

Supercontinuum Generation over 2 µm

Effective supercontinuum generation in fiber mediain spectral range over 2 μm was experimentallydemonstrated. Supercontinuum generation wasobserved in passive optical fibers. Maximumspectral broadening was obtained in germaniumdopedfibers with longest wavelength near 2.7 μm.To provide high spectral density we used opticalfiber amplifiers. Thus supercontinuum generationwas obtained in holmium optical fiber amplifiersmedium with spectral density 10 W/nm, in therange from 2 to 2.5 μm. In thulium fiber amplifiersobserved amplification not only in conventionalrange near 1.8 μm, but in spectral range from 2.3 to2.5 μm, that corresponds to 3H4→ 3H5 opticaltransition possibility in thulium-doped opticalfibers

Simultaneous determination of time and space-dependent coefficients in a parabolic equation

This paper investigates a couple of inverse problems of simultaneously determining time and space dependent coefficients in the parabolic heat equation using initial and boundary conditions of the direct problem and overdetermination conditions. The measurement data represented by these overdetermination conditions ensure that these inverse problems have unique solutions. However, the problems are still ill-posed since small errors in the input data cause large errors in the output solution. To overcome this instability we employ the Tikhonov regularization method. The finite-difference method (FDM) is employed as a direct solver which is fed iteratively in a nonlinear minimization routine. Both exact and noisy data are inverted. Numerical results for a few benchmark test examples are presented, discussed and assessed with respect to the FDM mesh size discretisation, the level of noise with which the input data is contaminated, and the chosen regularization parameters

Multiwavelength generation in a random distributed feedback fiber laser using an all fiber Lyot filter

Multiwavelength lasing in the random distributed feedback fiber laser is demonstrated by employing an all fiber Lyot filter. Stable multiwavelength generation is obtained, with each line exhibiting subnanometer line-widths. A flat power distribution over multiple lines is obtained, which indicates that the power between lines is redistributed in nonlinear mixing processes. The multiwavelength generation is observed both in first and second Stokes waves

Diffraction problems for quasilinear parabolic systems with boundary intersecting interfaces

Stability of Unilateral Posterior Crossbite Correction in the Mixed Dentition - an RCT-study with 3-year Follow-Up. Aim: To compare and evaluate long-term stability of crossbite correction with Quad Helix or expansion plate in the mixed dentition. Methods: In this RCT-study 35 patients with unilateral posterior crossbite were randomized to be treated with either Quad Helix or expansion plate. The inclusion criteria were: mixed dentition, unilateral posterior crossbite, no sucking habits or previous orthodontic treatment. Stability was evaluated after 3 years by study cast measurements. Twenty subjects with normal occlusion were included as controls. Success rate, maxillary and mandibular transverse dimensions, overjet, overbite and arch length were registered. Results: Stability was equal for the two treatment methods. Small, albeit significant, differences between the groups were assessed with reference to transverse dimensions. No significant difference was seen for overjet and overbite. The treated patients never reached the same transversal width as the normal control group. Conclusions: The long-term stability of posterior crossbite correction with Quad helix and expansion plate was equal. The maxillary width was greater in the control group than the treated groups

Lyot-filter based multiwavelength random distributed feedback fiber laser

Multiwavelength lasing in the random distributed feedback fiber laser is demonstrated by employing an all fiber Lyot filter. Stable multiwavelength generation is obtained, with each line exhibiting sub-nanometer line-widths. A flat power distribution over multiple lines is also obtained, which indicates the contribution of nonlinear wave mixing towards power redistribution and equalization in the system. The multiwavelength generation is observed simultaneously in first and second Stokes waves