VENTURE ECOSYSTEM IN RUSSIA AND THE UNITED STATES: A COMPARATIVE ANALYSIS

The aim of the research is to analyse the features of development and current state of the main elements of venture ecosystem in Russia and the United States. To achieve this goal, the authors reveal and analyse the key features of the studied natural ecosystems. The paper considers the chronology of the stages of development of venture ecosystems in both countries, determines their current state, including the volume and number of concluded venture transactions, their ratio by stages of the investment process. The article highlights the key differences between socio-cultural factors and legal frameworks that regulate and influence the activities of venture ecosystems. The study identifies the main problematic aspects of the development of the innovative potential of the Russian Federation and the reasons for their occurrence. The authors carry out a comparative analysis of the venture industry in Russia and the United States, identify on its basis, the key problems that hinder the development of the venture ecosystem in Russia, and give recommendations for overcoming

Polarization switching kinetics at the nanoscale in ferroelectric copolymer Langmuir-Blodgett films

The polarization switching kinetics of ferroelectric Langmuir–Blodgett films of vinylidene fluoride-trifluoroethylene copolymer were investigated by piezoresponse force microscopy with a resolution of 100 nm. The switching time in response to a localized voltage pulse exhibits an exponential dependence on reciprocal voltage, which is consistent with nucleation-limited switching dynamics

27 Al NMR/MRI Studies of the Transport of Granular Al 2 O 3

The NMR/MRI techniques are applicable to the studies of motion of granular solids, providing information on the velocities, effective diffusivities and correlation times of the moving particles. The studies of transport of granular solids reported to-date are based on the detection of the 1H NMR signal of the liquid phase of liquid-containing solid materials. Yet, the solid phase of many granular solids contains magnetic nuclei, providing in principle an opportunity to study motion of such solids by directly detecting the NMR signal of the solid phase. In this paper, we demonstrate that this can be performed with the use of conventional echo pulse sequences in combination with the conventional motion encoding schemes. The detection of the 27Al NMR signal of the Al2O3 powder was used to obtain velocity maps of the powder packed in a spinning cylinder, and to measure the velocity distribution (average propagator) for the gravity driven transport of the same powder in a vertical pipe

The all-sky GEOS RR Lyr survey with the TAROT telescopes. Analysis of the Blazhko effect

We used the GEOS database to study the Blazhko effect of galactic RRab stars. The database is continuously enriched by maxima supplied by amateur astronomers and by a dedicated survey by means of the two TAROT robotic telescopes. The same value of the Blazhko period is observed at different values of the pulsation periods and different values of the Blazhko periods are observed at the same value of the pulsation period. There are clues suggesting that the Blazhko effect is changing from one cycle to the next. The secular changes in the pulsation and Blazhko periods of Z CVn are anticorrelated. The diagrams of magnitudes against phases of the maxima clearly show that the light curves of Blazhko variables can be explained as modulated signals, both in amplitude and in frequency. The closed curves describing the Blazhko cycles in such diagrams have different shapes, reflecting the phase shifts between the epochs of the brightest maximum and the maximum O-C. Our sample shows that both clockwise and anticlockwise directions are possible for similar shapes. The improved observational knowledge of the Blazhko effect, in addition to some peculiarities of the light curves, have still to be explained by a satisfactory physical mechanism.Comment: 13 pages, 12 figures, accepted for publication in Astronomical Journa

Impact of Cultivating Environment on the Terms of Persistence and Certain Properties of Cholera Vibrios

Objective of the study is to investigate the impact of cultivating temperature and medium on the terms of persistence, ctx gene retention, and enzymatic activity of V. cholerae O1 with various toxigenicity.Materials and methods. Utilized were the strains of V. cholerae El Tor: P-5879, P-19613, and also the strain P-19787.Results and conclusions. In the process of studying cholera vibrios El Tor with different genetic characteristics it was determined that the longest terms of persistence (19 days) on mineral substrates at 5 ºC were observed for toxigenic strains, while for non-toxigenic ones it made less than 17 days. At the same time cholera vibrios can persist continuously and even reproduce on mineral substrates under the conditions of subnormal lowered temperatures (not less than 10 °C). Toxigenic strains of Vibrio cholerae, irrespectively of cultivating medium and temperature, retained ctx gene in their genome and maintained enzymatic activity throughout the experiment. Such long-term persistence of cholera vibrios at low temperatures on mineral substrates may be regarded as possibility of preservation of V. cholerae toxigenic strains in case of import by the infected persons or vibrio-carriers

Servant Leadership and Innovative Work Behavior in Chinese High-Tech Firms: A Moderated Mediation Model of Meaningful Work and Job Autonomy

Scholars acknowledge the critical role of employee innovative work behavior (IWB) in facilitating organizational innovation in high-tech industries. However, the current knowledge is far from complete to paint a clear picture of how to evoke employee IWB in the Chinese high-tech industry. Many Chinese high-tech firms face a challenge moving from hierarchy-based leadership toward more employee-centered leadership styles, as the styles have different effects on employees’ IWB. This perspective may complement and sharpen the incomplete picture. Drawing on a dynamic componential model of creativity and innovation, this study proposes and tests a moderated mediation model that examines the hypothesized positive influence of servant leadership on employee IWB via meaningful work as well as the moderating role of job autonomy in this process. We collected data (N = 288) from three Chinese high-tech firms and found that employees’ perceptions of meaningful work mediate the relationship between servant leaders and IWB. We also found that this mediating relationship is conditional on the moderating role of job autonomy in the path from servant leadership to meaningful work. The results further show that the indirect effect of servant leadership on employee IWB via meaningful work exists only when job autonomy is high