28 research outputs found
My Dreams by Georg Heym as a Literary Source
No full textDiary records by German expressionist poet Georg Heym (1887–1912) where he describes his dreams and night fantasies demonstrate his deep interest in borderline psychic conditions and give us a unique opportunity to get inside poet’s creative workshop. In My Dreams Georg Heym records various manifestations of his imagination: his passion for antiquity and revolutionary France history, macabre scenes of violence, and disturbances of his personal life. The Russian translation is done by Konstantin Matrosov. Introduction by Anton Chorny is an attempt to track the history of the manuscript and its traces in memoirs and scholarly papers. Commentaries give brief information on personal names and circumstances mentioned by the author
Analysis of the microphysical properties of snowfall using scanning polarimetric and vertically pointing multi-frequency Doppler radars
No full textRadar dual-wavelength ratio (DWR) measurements from the Stony Brook Radar Observatory Ka-band scanning polarimetric radar (KASPR, 35 GHz), a W-band profiling radar (94 GHz), and a next-generation K-band (24 GHz) micro rain radar (MRRPro) were exploited for ice particle identification using triple-frequency approaches. The results indicated that two of the radar frequencies (K and Ka band) are not sufficiently separated; thus, the triple-frequency radar approaches had limited success. On the other hand, a joint analysis of DWR, mean Doppler velocity (MDV), and polarimetric radar variables indicated potential in identifying ice particle types and distinguishing among different ice growth processes and even in revealing additional microphysical details.
We investigated all DWR pairs in conjunction with MDV from the KASPR profiling measurements and differential reflectivity (ZDR) and specific differential phase (KDP) from the KASPR quasi-vertical profiles. The DWR-versus-MDV diagrams coupled with the polarimetric observables exhibited distinct separations of particle populations attributed to different rime degrees and particle growth processes. In fallstreaks, the 35–94 GHz DWR pair increased with the magnitude of MDV corresponding to the scattering calculations for aggregates with lower degrees of riming. The DWR values further increased at lower altitudes while ZDR slightly decreased, indicating further aggregation. Particle populations with higher rime degrees had a similar increase in DWR but a 1–1.5 m s−1 larger magnitude of MDV and rapid decreases in KDP and ZDR. The analysis also depicted the early stage of riming where ZDR increased with the MDV magnitude collocated with small increases in DWR. This approach will improve quantitative estimations of snow amount and microphysical quantities such as rime mass fraction. The study suggests that triple-frequency measurements are not always necessary for in-depth ice microphysical studies and that dual-frequency polarimetric and Doppler measurements can successfully be used to gain insights into ice hydrometeor microphysics
Approximate analytical solutions in the analysis of elastic structures of complex geometry
No full textA method of analytical decomposition in analyses of elastic structures of complex geometry
No full textThe paper addresses the new numerical-analytical method for analyzing two-dimensional linearly elastic heterogeneous structures composed of a number of contiguous rectangles. For each rectangle we can build a common solution in a form of series with indeterminate coefficients. These coefficients are evaluated meeting boundary conditions of the whole structure and conjugation conditions of the contiguous areas. The analytical method of superposition was used to build a general solution for the orthotropic/isotropic rectangle with arbitrary boundary conditions on its edges. This method was used in [1,2] to evaluate the stress fields in the two-dimensional elastic isotropic rectangle under symmetric loads on its opposite sides. The paper [3] reviewed the progress in the superposition method for the solution of boundary-value problems.In this paper in accordance with the superposition method the general solutions for the orthotropic and isotropic rectangles are composed of two solutions obtained by the method of initial functions [4,5] in the form of trigonometric series with undetermined coefficients. The process of satisfying the boundary conditions leads to an infinite system of linear algebraic equations to determine the unknown coefficients in the solution. A simple reduction to a finite system is used to obtain a solution. If a structure may be presented by a number of contiguous rectangles with finite dimensions then we can use general solutions constructed for each of the rectangles and get again an infinite linear algebraic system to determine unknown coefficients in all general solutions [6]. We name this approach a “method of analytical decomposition”. It can be used to analyze as homogeneous as heterogeneous structures. An application of this method is demonstrated on analyzing the stress and strain state of a rectangle (x [0,h], y [0,a]) loaded on the side x=0 and clamped on two opposite sides (y=0,a) with a number of cracks parallel to the axe Ox in in the neighborhood of the side x=h
A method of analytical decomposition in analyses of elastic structures of complex geometry
No full textThe paper addresses the new numerical-analytical method for analyzing two-dimensional linearly elastic heterogeneous structures composed of a number of contiguous rectangles. For each rectangle we can build a common solution in a form of series with indeterminate coefficients. These coefficients are evaluated meeting boundary conditions of the whole structure and conjugation conditions of the contiguous areas. The analytical method of superposition was used to build a general solution for the orthotropic/isotropic rectangle with arbitrary boundary conditions on its edges. This method was used in [1,2] to evaluate the stress fields in the two-dimensional elastic isotropic rectangle under symmetric loads on its opposite sides. The paper [3] reviewed the progress in the superposition method for the solution of boundary-value problems.In this paper in accordance with the superposition method the general solutions for the orthotropic and isotropic rectangles are composed of two solutions obtained by the method of initial functions [4,5] in the form of trigonometric series with undetermined coefficients. The process of satisfying the boundary conditions leads to an infinite system of linear algebraic equations to determine the unknown coefficients in the solution. A simple reduction to a finite system is used to obtain a solution. If a structure may be presented by a number of contiguous rectangles with finite dimensions then we can use general solutions constructed for each of the rectangles and get again an infinite linear algebraic system to determine unknown coefficients in all general solutions [6]. We name this approach a “method of analytical decomposition”. It can be used to analyze as homogeneous as heterogeneous structures. An application of this method is demonstrated on analyzing the stress and strain state of a rectangle (x [0,h], y [0,a]) loaded on the side x=0 and clamped on two opposite sides (y=0,a) with a number of cracks parallel to the axe Ox in in the neighborhood of the side x=h
