Research of sensitivity of some measures of quality assessment of hidden information in the audio content

The paper presents a comparison of some measures of difference between the original signal and the result of the introduction of additional information. The comparison was based on the analysis of the implementation of the results-based steganographic method of spectrum spreading. The paper presents the results of the comparison of some measures of difference based on the analysis of speech signals in their division into segments of equal lengt

TRAINING OF FUTURE TEACHERS ON THE BASIS OF VARIABLE EDUCATIONAL MODEL

В статье рассматривается вариативная модель подготовки педагога основного и среднего общего образования. Описана модульная основная образовательная программа, обеспечивающая индивидуальную образовательную траекторию для магистров направления «Педагогическое образование»The article deals with a variable model of teacher training of basic and secondary General education. The modular basic educational program providing an individual educational trajectory for masters of the direction «Pedagogical education» is describe

THEORETICAL BASES OF ECONOMIC MEASUREMENTS OF VALUE IN THE CONDITIONS OF GLOBAL TECHNOLOGICAL SHIFTS AND CRISES. NEWEST METHODOLOGICAL BASIS (PART 1)

Problems of measuring scientific and technological progress (STP) in the transition to the sixth technological mode have been considered. Now STP is measured mainly by natural indicators. Forecasting requires a valuation of capital, taking into account fluctuations in the interest rate at the macro level;assessment of public production efficiency and new technologies. Unified applied methodology for such assessments has not yet been formulated. For these purposes, the methodology of the theory of economic measurements, which is also in its infancy, and its latest concepts, can serve. In relation to STP, the object of assessment can be the value of capital and its depreciation in the final phase of the transition period, the effectiveness of STP and money itself, considered as the main measure of value and creating the effects of procyclical value of capital in the conditions of technological shifts and crises

Electronic Structure and Light-Induced Conductivity of a Transparent Refractory Oxide

Combined first-principles and experimental investigations reveal the underlying mechanism responsible for a drastic change of the conductivity (by 10 orders of magnitude) following hydrogen annealing and UV irradiation in a transparent oxide, 12CaO · 7Al2O3, found by Hayashi et al. [Nature (London) 419, 462 (2002).] The charge transport associated with photoexcitation of an electron from H- occurs by electron hopping.We identify the atoms participating in the hops, determine the exact paths for the carrier migration, estimate the temperature behavior of the hopping transport, and predict a way to enhance the conductivity by specific doping

THEORETICAL BASES OF ECONOMIC MEASUREMENT OF VALUE IN THE CONDITIONS OF GLOBAL TECHNOLOGICAL SHIFTS AND CRISES. NEWEST METHODOLOGICAL BASE (PART 2)

The problems of measuring scientific and technical progress in the transition to the sixth technological mode have been considered. Nowadays scientific and technical progress is measured mainly by natural indicators. Forecasting requires a valuation of capital, taking into account fluctuations in the interest rate at the macro level; assessment of public production efficiency and new technologies. The applied methodology for such assessments has not yet been formulated. For these purposes, the methodology of the theory of economic measurements, which is also at the infancy stage and its latest concepts can serve. In relation to scientific and technical progress, the object of assessment may be the cost of capital and its depreciation in the final phase of the transition period, the effectiveness of scientific and technical progress and the money itself, considered as the main measure of value, and creating the effects of procyclical cost of capital in the conditions of technological shifts and crises

Tunable Conductivity and Conduction Mechanism in a UV light activated electronic conductor

A tunable conductivity has been achieved by controllable substitution of a novel UV light activated electronic conductor. The transparent conducting oxide system H-doped Ca12-xMgxAl14O33 (x = 0; 0.1; 0.3; 0.5; 0.8; 1.0) presents a conductivity that is strongly dependent on the substitution level and temperature. Four-point dc-conductivity decreases with x from 0.26 S/cm (x = 0) to 0.106 S/cm (x = 1) at room temperature. At each composition the conductivity increases (reversibly with temperature) until a decomposition temperature is reached; above this value, the conductivity drops dramatically due to hydrogen recombination and loss. The observed conductivity behavior is consistent with the predictions of our first principles density functional calculations for the Mg-substituted system with x=0, 1 and 2. The Seebeck coefficient is essentially composition- and temperature-independent, the later suggesting the existence of an activated mobility associated with small polaron conduction. The optical gap measured remains constant near 2.6 eV while transparency increases with the substitution level, concomitant with a decrease in carrier content.Comment: Submitted for publicatio

Combining high conductivity with complete optical transparency: A band-structure approach

A comparison of the structural, optical and electronic properties of the recently discovered transparent conducting oxide (TCO), nanoporous Ca12Al14O33, with those of the conventional TCO's (such as Sc-doped CdO) indicates that this material belongs conceptually to a new class of transparent conductors. For this class of materials, we formulate criteria for the successful combination of high electrical conductivity with complete transparency in the visible range. Our analysis suggests that this set of requirements can be met for a group of novel materials called electrides.Comment: 3 pages, 3 figures, submitted for publicatio

Electronic band structure and carrier effective mass in calcium aluminates

First-principles electronic band structure investigations of five compounds of the CaO-Al2O3 family, 3CaO.Al2O3, 12CaO.7Al2O3, CaO.Al2O3, CaO.2Al2O3 and CaO.6Al2O3, as well as CaO and alpha-, theta- and kappa-Al2O3 are performed. We find that the conduction band in the complex oxides is formed from the oxygen antibonding p-states and, although the band gap in Al2O3 is almost twice larger than in CaO, the s-states of both cations. Such a hybrid nature of the conduction band leads to isotropic electron effective masses which are nearly the same for all compounds investigated. This insensitivity of the effective mass to variations in the composition and structure suggests that upon a proper degenerate doping, both amorphous and crystalline phases of the materials will possess mobile extra electrons

Tunable Conductivity and Conduction Mechanism in an Ultraviolet Light Activated Electronic Conductor

A tunable conductivity has been achieved by controllable substitution of an ultraviolet light activated electronic conductor. The transparent conducting oxide system H-doped Ca12-xMgxAl14O33 (x=0,0.1,0.3,0.5,0.8,1.0) presents a conductivity that is strongly dependent on the substitution level and temperature. Four-point dc-conductivity decreases with x from 0.26 S/cm (x=0) to 0.106 S/cm (x=1) at room temperature. At each composition the conductivity increases (reversibly with temperature) until a decomposition temperature is reached; above this value, the conductivity drops dramatically due to hydrogen recombination and loss. The observed conductivity behavior is consistent with the predictions of our first principles density functional calculations for the Mg-substituted system with x=0, 1, and 2. The Seebeck coefficient is essentially composition and temperature independent, the later suggesting the existence of an activated mobility associated with small polaron conduction. The optical gap measured remains constant near 2.6 eV while transparency increases with the substitution level, concomitant with a decrease in carrier content

Mycoplasmas and their antibiotic resistance: The problems and prospects in controlling infections

© 2016 Park-media, Ltd.The present review discusses the problem of controlling mycoplasmas (class Mollicutes), the smallest of self-replicating prokaryotes, parasites of higher eukaryotes, and main contaminants of cell cultures and vaccines. Possible mechanisms for the rapid development of resistance to antimicrobial drugs in mycoplasmas have been analyzed. Omics technologies provide new opportunities for investigating the molecular basis of bacterial adaptation to stress factors and identifying resistomes, the total of all genes and their products contributing to antibiotic resistance in microbes. The data obtained using an integrated approach with post-genomics methods show that antibiotic resistance may be caused by more complex processes than has been believed heretofore. The development of antibiotic resistance in mycoplasmas is associated with essential changes in the genome, proteome, and secretome profiles, which involve many genes and proteins related to fundamental cellular processes and virulence