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Publicatii proprii
BLACK BOX ARC MODEL PARAMETERS DETERMINATION FROM OSCILLOGRAMS
Last years, authors developed a four parameters arc model before current zero, considering a linear dependency of the cooling power and of arc time constant on the module of arc current. The model was in enough good agreement with the synthetic test data records during the last 8-10 microseconds before current zero, obtained in Praha HPL and the new introduced parameters of switching devices was determined to fit better the experimental data. To
Read moreThermal Field Diffusion in One, Two and Three-Dimensional Half Space
The diffusion of suddenly occurring local high temperature in homogeneous half-infinite space is studied in the cases of one, two and threedimensional half space. Comparison of the three cases is made. Applications of theoretically analyzed models are suggested. Errors induced by assumptions are evaluated.
Read moreResistance of Arbitrary Angle Corner
The field modelling becomes simpler if strong field nonuniformities are solved theoretically. The early-obtained formulas for 2-D "corner" permeances, (capacitances or resistances) pertain to right angle configurations. In this paper, using a conformal mapping and analytical approximations, the field in the vicinity of arbitrary angle corner is studied and the corner resistance determined. Obtained results can be applied to a large range of electromagnetic
Read morePermeance of fringing flux
Field modeling becomes simpler if strong field nonuniformities are solved theoretically. The early obtained formulas for 2-D “corner” and “constriction” permeances pertain to right angle configurations. In this paper, using a conformal mapping, the field in the vicinity of arbitrary angle vertex is studied and the fringing permeance determined. The results are applied to permeance evaluation of lunate cross section grooves from the rotors
Read moreBinary and Ternary Coordination Polymers in Aqueous Pb(II)-dicarboxylic acid-(phen) systems. The influence of O- and S-Ligand Heteroatoms on the Assembly of Distinct Lattice Architecture, Dimensionality and Spectroscopic Properties
Poised to understand the influence of O- and S-heteroatoms on the chemical reactivity of dicarboxylic acids toward Pb(II), leading to crystalline metal–organic hybrid materials with distinct lattice architecture, dimensionality, and spectroscopic properties, the synthesis and physicochemical properties of binary/ternary Pb(II)–(O,S)-dicarboxylic acid–(phenanthroline) systems was investigated in aqueous media. pH-specific hydrothermal reactions
Read morepH-Specific Synthesis, Spectroscopic, Structural and Magnetic, and Aqueous Solution Studies in the Binary Cr(III)-Quinato System
Chromium is widespread in the environment and is used in ample industrial applications in abiotic and biological systems. Its ability to influence biological processes through interactions with biomolecules underscores its positive role as well as its toxic manifestations in higher organisms. In an attempt to understand its (bio)chemistry, research efforts were undertaken to explore the aqueous chemistry of Cr(III) with the low molecular mass physiological
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