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We consider problems estimating measurement uncertainty for shape deviations in planar surfaces of large parts using the reference plane method. The sources of uncertainty in the implementation of various measurement schemes by this method are analyzed. The schemes are determined by the methods of realization of the output base – the plane defined by the three reference points of the supporting platform of the measuring system, as well as the methods of obtaining and processing primary measurement information. The results of experimental studies of the accuracy of a multisensor system designed to assess the topography of the flat surfaces of mechanical elements of particle accelerators are presented. [ABSTRACT FROM AUTHOR]

The phase diagram of the (SbTe)-InSb system was determined based on x-ray diffraction (XRD) analysis, differential thermal analysis (DTA), and microhardness and density measurements. An intermediate compound with composition SbTe·2InSb was formed as a result of syntectic reaction, melting incongruently at 553 °C. This compound has tetragonal lattice with unit cell parameters of a = 4.3937 Å, b = 4.2035 Å, c = 3.5433 Å, α = 93.354°, and β = γ = 90°. SbTe·(2 + δ)InSb (−1 ≤ δ ≤ +1) and (SbTe)(InSb) (90 ≤ x ≤ 100) solid solutions exist in the investigated system, based on the intermediate compound SbTe·2InSb and on InSb, respectively. Also, two invariant equilibria exist in the system, with eutectic point coordinates at compositions of x = 60 and x ≈ 85 mol% InSb and eutectic temperatures of T = 541 and T ≈ 501 °C, respectively. [ABSTRACT FROM AUTHOR]

Using differential thermal analysis, x-ray diffraction analysis and density measurements the phase diagram of the TeO-CdI system is built. It is characterized with four non-variant equilibria: the temperatures of the eutectic, monotectic, peritectic and peritectoidal points are at 345, 565, 470 and 240 °C, respectively. As a result of the passing of peritectic and peritectoidal reactions, two intermediate compounds with composition CdI·3TeO (A) and 2CdI·3TeO (B) are formed, both crystallizing in monoclinic lattice system with near unit cell parameters. The intermediate compounds A and B possess narrow solid-solution regions. The B passes through polymorphous transition, which, depending on the composition, varies between 245 and 265 °C. The two intermediate compounds, together with the initial TeO and CdI, determine the presence of 16 phase fields: 5 monophase (melt L, α-TeO, β-B, α-A and α-B) and 11 two-phase. These characteristics of the phase diagram of the TeO-CdI system (two intermediate compounds with complicated compositions CdI·3TeO and 2CdI·3TeO, two low-temperature eutectic and monotectic transitions at T = 345 and T = 570 °C, respectively, are sufficient precondition for obtaining of new oxychalcohalide glasses with wide region of glass formation in three-component systems from the MeCh-TeO-CdI kind (MeCh-glassformer). [ABSTRACT FROM AUTHOR]

The phase diagram of the system GeSe2–SnSe is studied by means of X-ray diffraction, differential thermal analysis and measurements of the density and the microhardness of the material. There are no intermediate compounds in it, as well as regions of range of solid solutions at room temperature on the base of GeSe2 and SnSe. There are two non-variant equilibria in the system: eutectic (where T e=530±5°C and x e= 40 mol% SnSe) and metaeutectic (where T m=550±5°C and x m=98 mol% SnSe). [ABSTRACT FROM AUTHOR]

The phase diagram of the system Ag4SSe–As2Se3 is studied by means of X-ray diffraction, differential thermal analyses and measurements of the microhardness and the density of the materials. The unit-cell parameters of the intermediate phases 3Ag4SSe·As2Se3 (phase A) and Ag4SSe·2As2Se3 (phase B) are determined as follows for phase A: a=4.495 Å, b=3.990 Å, c=4.042 Å, α=89.05°, β=108.98°, γ=92.93°; for phase B: a=4.463 Å, b=4.136 Å, c=3.752 Å, α=118.60°, β=104.46°, γ=83.14°. The phase 3Ag4SSe·As2Se3 and Ag4SSe·2As2Se3 have a polymorphic transition α↔β consequently at 105 and 120°C. The phase A melts incongruently at 390°C and phase B congruently at the same temperature. [ABSTRACT FROM AUTHOR]

This paper presents results of superconducting microstrip transmission line simulation for the frequency range 100–1100 GHz. The simulation is used to calculate the characteristic impedance and the wave propagation constant in a superconducting microstrip line having different geometry. Indeed, modelling provides the only tool for designing superconducting microstrip-based circuits at millimetre and sub-millimetre wavelengths because no direct measurements of such a line can be made at this wavelengths and at cryogenic temperature of 4 K with ultimate accuracy. Niobium, as the most commonly exploited superconducting material, was used for the modelling, though the same approach would work for any different BCS superconductor. In order to evaluate the model accuracy, we have made an extensive comparison study of the superconducting microstrip models known from earlier publications, performed numerical simulations using 3D EM — solver, HFSS, and used a new model introduced in this paper with all simulation result plotted in the paper. [ABSTRACT FROM AUTHOR]

The state diagrams ( T- x) of the systems Ag2Te-ZnTe(I) and Ag2Te-Zn(II) are offered on the ground of data obtained by differential thermal analysis, X-ray phase analysis, microstructural analysis and measurements of the density and the microhardness of samples synthesized. The systems studied are quasibinary sections of the ternary system Ag-Zn-Te. System I is characterized by two eutectic and three eutectoidal non-variant equilibria as well as by an intermediate compound Ag2ZnTe2, which melts congruently at 880°C. The latter exists in the range from 120 to 880°C in two polymorphic modifications (Tʅ→β=515°C). System II is characterized by one eutectic, two eutectoidal and one peritectic nonvariant equilibria, boundary solid solutions on the ground of Ag2Te and Zn and one intermediate phase of the composition Ag4Zn3Te2, which melts congruently at 880°C. [ABSTRACT FROM AUTHOR]

The phase diagram of the system CdI2-Bi2O3 is studied by means of X-ray diffraction, differential thermal analysis and measurements of the density of the material. As a result of the synthetic and peritectic interactions, two incongruently melting intermediate phases i.e. phase A - CdI2·2Bi2O3 and phase B - CdI2·4Bi2O3 (stable in the temperature interval 370-850°C) are formed. The phase A exists in two polymorphic forms with a temperature of the phase transition Ta↔b=320-370°C. The unit cell parameters at low temperature modification of a-CdI2·2Bi2O3 were determined. (a=1.032 nm, b=1.046 nm, c=1.046 nm, α=115.02°, β=109.11° and γ=82.04°). The phases A and B have fields of homogeneity. [ABSTRACT FROM AUTHOR]

The phase diagram of the system GeSe2-SnTe is studied by means of X-ray diffraction, differential thermal and measurements of the microhardness and the density of the material. The unit-cell parameters of the intermediate phases α-3GeSe2·SnTe (phase A) and GeSe2·2SnTe (phase B) are determined as follows for phase A: a=0.7955 nm, b=0.6969 nm, c=0.6064 nm, α=91.47°, β=85.90°; for phase B: a=0.6063 nm. The phase α-3GeSe2·SnTe melts congruently at 500°C and a polymorphic transition of the phase takes place at Tα?↔β=400°C and the phase GeSe2·2SnTe at 385°C decomposes to the peritectoidal reaction at α-3GeSe2·SnTe+SnTe. [ABSTRACT FROM AUTHOR]

The phase diagram of the system Ag4SSe-SnTe is studied by means of X-ray diffraction, differential thermal and metallographic analyses and measurements of the microhardness and the density of the material. this diagram is divided into two eutectic-type subdiagrams by the composition Ag4SSe·2SnTe. The unit-cell parameters of the intermediate phases 3Ag4SSe-SnTe (phase A) and α-Ag4SSe·2SnTe (phase B) are determined as follows: a=0.7851 nm, b=0.7196 nm, c=0.6296 nm, α=101.32°, β85.90°, γ=111.36°; for phse B:a=0.3662 nm, b=0.3303 nm, c=0.3343 nm, α=90.74°, β108.94°, γ=91.91°. The phase Ag4SSe·2SnTe melts congruently at 615°C and a polymorphic transition of the phase takes place at Tαharr;β=110°C. [ABSTRACT FROM AUTHOR]

The paper deals with a comparative analysis of the serological and ecological properties of Pseudomonas syringae pv. atrofaciens strains from the collections of microbial cultures at the Malkov Institute for Plant Genetic Resources and Zabolotny Institute of Microbiology and Virology. All of the strains from the Bulgarian collection, except for one, fall into five serogroups (II through VI) of the classification system of Pastushenko and Simonovich. The P. syringae pv. atrofaciens strains isolated from Bulgarian and Ukrainian wheats belong mainly to serogroups II and IV, respectively. The strains that were isolated from rye plants belong to serogroup I. The strains isolated from sorghum and Sudan grass belong to serogroups II, IV, and VI. Serogroup III includes the P. syringae pv. atrofaciens strains that were isolated from cereals in the United Kingdom but not in Ukraine. [ABSTRACT FROM AUTHOR]

The Ag4SSe-ZnTe phase diagram has been determined on the basis of X-ray diffraction, differential thermal and metallographic analyses, as well as microhardness and density data. It has been divided into two subdiagrams of eutectic type by an intermediate A-phase with most probable composition of 2Ag4SSe.ZnTe. The unit-cell parameters of the low-temperature α-2Ag4SSe·ZnTe modification have been determined (a=3.330 Å, b=3.010 Å, c=2.895 Å, η=95.04°, β=107.83°, γ=92.62°). It has been supposed that in the ZnTe-rich part a second intermediate B-phase with a composition of Ag4SSe·2ZnTe is formed, which is stable in the range of 320÷500 °C. [ABSTRACT FROM AUTHOR]