803 research outputs found
LC nanocomposites: induced optical singularities, managed nano/micro structure, and electrical conductivity
Microstructure, phase transitions, electrical conductivity, and optical and
electrooptical properties of multiwalled carbon nanotubes (NTs), dispersed in
the cholesteric liquid crystal (cholesteryl oleyl carbonate, COC), nematic 5CB
and their mixtures, were studied in the temperature range between 255 K and 363
K. The relative concentration X=COC/(COC+5CB)was varied within 0.0-1.0. The
concentration of NTs was varied within 0.01-5% wt. The value of X
affected agglomeration and stability of NTs inside COC+5CB. High-quality
dispersion, exfoliation, and stabilization of the NTs were observed in COC
solvent ("good" solvent). From the other side, the aggregation of NTs was very
pronounced in nematic 5CB solvent ("bad" solvent). The dispersing quality of
solvent influenced the percolation concentration , corresponding to
transition between the low conductive and high conductive states: e.g.,
percolation was observed at and for pure COC and 5CB,
respectively. The effects of thermal pre-history on the heating-cooling
hysteretic behavior of electrical conductivity were studied. The mechanism of
dispersion of NTs in COC+5CB mixtures is discussed. Utilization of the mixtures
of "good" and "bad" solvents allowed fine regulation of the dispersion,
stability and electrical conductivity of LC+NTs composites. The mixtures of COC
and 5CB were found to be promising for application as functional media with
controllable useful chiral and electrophysical properties.Comment: 10 pages, 9 figure
International justice as a way to settle conflicts in the world arena : the idea and the implementation
The purpose of this article is to identify the processes regarding the emergence of international justice and the start of international courts functioning.
Dialectical, phenomenological and historical methods of analysis is the methodological basis of the article to allow to identify the international justice essence and the specifics of this phenomenon implementation in the initial stages of its development.
In the course of this analysis the authors came to the conclusion that the international justice concept formation occurred in the turn of the XIXth and XXth centuries while the international justice formation took place in the first half of the XXth century.peer-reviewe
Unsupervised discovery of temporal sequences in high-dimensional datasets, with applications to neuroscience.
Identifying low-dimensional features that describe large-scale neural recordings is a major challenge in neuroscience. Repeated temporal patterns (sequences) are thought to be a salient feature of neural dynamics, but are not succinctly captured by traditional dimensionality reduction techniques. Here, we describe a software toolbox-called seqNMF-with new methods for extracting informative, non-redundant, sequences from high-dimensional neural data, testing the significance of these extracted patterns, and assessing the prevalence of sequential structure in data. We test these methods on simulated data under multiple noise conditions, and on several real neural and behavioral datas. In hippocampal data, seqNMF identifies neural sequences that match those calculated manually by reference to behavioral events. In songbird data, seqNMF discovers neural sequences in untutored birds that lack stereotyped songs. Thus, by identifying temporal structure directly from neural data, seqNMF enables dissection of complex neural circuits without relying on temporal references from stimuli or behavioral outputs
Identification of new cataclysmic variables in the 1RXS and USNO-B1.0 catalogs
As a result of applying the original optical variability search method on
publicly available data, we have found eight new cataclysmic variables and two
possible Optically Violent Variable quasars among the previously unidentified
X-ray sources in the ROSAT catalog. We describe the search method and present
the characteristics of the newly identified variable stars. The obtained
results demonstrate the large potential of the concept of Virtual Observatory
for identifying new objects of astrophysical interest.Comment: 16 pages, 11 figures, 2 tables; submitted to Astronomy Letter
The advantages of sensor control systems ventilinduction engine, as the guarantee of its troublefree work at higher speeds rotations
In work the advantages of the sensor control system of the gate-inductor motor with ceramic insulation over the sensorless control system are considered
Integration of economic shifts in the european development in the second half of the XXth century
Purpose: The article analyzes those processes having initiated the development of the European and political integration. The article is focused on the genesis and the development of the Council for Mutual Economic Assistance, the European Union, NATO and the Warsaw Pact. Design/Methodology/Approach: By applying the system analysis method as well as dialectical and historical methods, the authors have attempted to reveal the significance of those events resulted in modern international organizations establishment. Findings: Authors have analyzed the XX century trends in integration and highlighted Western Europe as the most productive in the process. Authors have provided the USSR and post-USSR integration overview to reveal the European development patterns. Practical Implications: The research results may be implemented into political and educational courses as well as to be used by official authorities. Originality/Value: The main contribution of this study is the deep integration trends'analysis and the emphasis on the unipolar-bipolar-multipolar world's concept.peer-reviewe
decays to from new data on
Data on the reaction with ,
taken with unpolarized or polarized beams in combination with an unpolarized or
polarized proton-target, were analyzed within the Bonn-Gatchina (BnGa) partial
wave analysis. Differential cross sections, several spin density matrix
elements, the beam asymmetry , the normalized helicity difference ,
and the correlation between linear photon and longitudinal target
polarization were included in a large data base on pion and photo-induced
reactions. The data on photoproduction are used to determine twelve
branching ratios; most of these are determined for the first
time.Comment: 6 pages, 4 figures, 2 table
The basic principles of the European state and dynamics of the political and legal development within the Russian Federation
The aim of the article is to identify the basic principles of European State and its approval within modern Russia, as well as the specifics of political and legal development of the latter. The methodological basis of research work used the dialectical, phenomenological analysis and synergetic methods to reveal the essence of the basic principles of a European state and the specificity of their adoption in contemporary Russia.
The study authors concluded that the implementation of the above principles in practice of political and legal development in Russia is associated with the activity of its civil society, in dialectical interaction with the state.peer-reviewe
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