Social aspects of industrial safety: current challenge

The paper discusses the importance of social aspects in industrial safety. Specifics of the Russian society, manifested in culture and set of population’s values cause underestimation of social constituents when breaking labor safety rules. At the same time, industrial infrastructure differs significantly from the environment, so safety in these conditions tends to change its essential characteristics. Governmental measures aimed at the improvement of industrial safety are insufficient. According to the study it is important to consider a technological environment as a field of human activity

Electronic properties and phase transitions in low-dimensional semiconductors

We present the first review of the current state of the literature on electronic properties and phase transitions in TlX and TlMX2 (M = Ga, In; X = Se, S, Te) compounds. These chalcogenides belong to a family of the low-dimensional semiconductors possessing chain or layered structure. They are of significant interest because of their highly anisotropic properties, semi- and photoconductivity, non-linear effects in their I-V characteristics (including a region of negative differential resistance), switching and memory effects, second harmonic optical generation, relaxor behavior and potential applications for optoelectronic devices. We review the crystal structure of TlX and TlMX2 compounds, their transport properties under ambient conditions, experimental and theoretical studies of the electronic structure, transport properties and semiconductor-metal phase transitions under high pressure, and sequences of temperature-induced structural phase transitions with intermediate incommensurate states. Electronic nature of the ferroelectric phase transitions in the above-mentioned compounds, as well as relaxor behavior, nanodomains and possible occurrence of quantum dots in doped and irradiated crystals is discussed.Comment: 70 pages, 38 figure

Organization of structured interaction on the base of psychographic characteristics within the model of personality traits DISC

The paper discusses impact factors assuring the change in the efficiency of structured interaction at enterprises and in organizations. Methodological tools included a pilot study based on the model of different personality traits (DISC). Participants of the study were 47 representatives of small work teams in companies of Siberian region. The paper interprets a correlation between the efficiency of structured interaction in work teams and social personality traits. The use of training forms aimed at adjusting a social model of work teams is said to be restricted. An interrelation between team building based on psychographic traits and application of latest organization principles of structured interaction was ascertained according to analysis data

Wintering oats in the conditions of the Maykop experimental station of RCRI

The article describes working with wintering oats at the Maykop Experimental Station. The authors analyze a fragment of the oats working collection of the FSBSI «Federal Research Center All-Russian Institute of Plant Genetic Resources named after N.I. Vavilov (RCRI)», which remains alive in the Maykop district of the Republic of Adygea, consisting of 800 samples. The data on the distribution of oat samples by origin, species composition and varieties are presented. The second part of the article describes the study of samples of new arrivals in the RCRI collection in order to highlight promising material for solving urgent selection problems.  The study consists of phenological and morphological observations, counts, assessment of resistance to biotic and abiotic factors, laboratory analysis of sheaf material. Productivity has been highlighted in the research, as the most important characteristic of a crop and a variety. For wintering oats productivity is closely related to overwintering conditions. Generalized data on overwintering of oats are presented and the causes of death of the samples are indicated. 448 samples from 46 countries have been studied for 10 years, 48 sources of high oat productivity have been identified, which we recommend for use in breeding

Synthesis and dielectric properties of ferroelectric-ferrimagnetic PZT-SFMO composites

Ferrimagnetic-ferroelectric composite materials on the base of Pb0.85Zr0.53Ti0.47O3– Sr2FeMoO6–δ (PZT-SFMO) compounds have been prepared by a complex ceramic technology and a modified sol-gel synthesis. The dielectric properties of the PZT-SFMO composites with the PZT concentrations of 55 wt% and less, as well as of pure SFMO, are caused by the Maxwell-Wagner relaxation and a huge electrical conductivity. In contrast, in pure PZT the ferroelectric phase transition is clearly expressed in the static dielectric permittivity anomaly. Moreover, in all investigated composites, similarly to pure SFMO, the electrical conductivity anomaly is observed in the range from 560–540 K. This indicates that the composites with PZT concentrations of 55 wt% and higher are above the electrical and magnetic percolation threshold, in a good agreement with the excluded volume theory. In PZT-SFMO composites the DC electrical conductivity increases with SFMO concentration almost in a power law fashion, while the activation energy of the DC conductivity decreases under certain conditions

Effect of nitrogen doping on the electromagnetic properties of carbon nanotube-based composites

Citation: J. Appl. Phys. 113, 144315 (2013); doi: 10.1063/1.4800897(Received 4 February 2013; accepted 25 March 2013; published online 12 April 2013) Nitrogen-doped and pure carbon nanotube (CNT) based composites were fabricated for investigating their dielectric properties in static regime as well as electromagnetic response properties in microwave frequency range (Ka-band). Two classes of host matrix—polystyrene and phosphate unfired ceramics—have been used for composites fabrication. The study reveals miscellaneous effect of nitrogen doping on the dielectric permittivity, dc conductivity and electromagnetic interference shielding efficiency of CNT-based composites, produced with both polymer and ceramic matrices. The high-frequency polarizability, estimated for different-length CNTs, and static polarizability, calculated for nitrogen-containing CNT models using a quantum- chemical approach, show that this effect results from a decrease of the nanotube defect-free-length and deterioration of the polarizability with incorporation of nitrogen in pyridinic form. V C 2013 AIP Publishing LLC [http://dx.doi.org/10.1063/1.4800897