91 research outputs found
A possible new phase of antagonistic nematogens in a disorienting field
A simple model is proposed for nematogenic molecules that favor perpendicular
orientations as well as parallel ones. (Charged rods, for example, show this
antagonistic tendency.) When a small disorienting field is applied along , a
low density phase of nematic order parameter coexists with a
dense biaxial nematic . (At zero field, becomes isotropic and
uniaxial.) But at stronger fields, a new phase , invariant under
rotations around the field axis, appears in between and .
Prospects for finding the phase experimentally are briefly discussed.Comment: 4 pages, 2 figures. Accepted for publication in PR
Kirlianographic investigation of the anthropogenic factors influence on biota
Kurik M. V., Pesotskay L. A., Glukhova N. V., Nikogosyan L. R. Kirlianographic investigation of the anthropogenic factors influence on biota. Journal of Education, Health and Sport. 2017;7(1):359-368 eISSN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.268736http://ojs.ukw.edu.pl/index.php/johs/article/view/4237 The journal has had 7 points in Ministry of Science and Higher Education parametric evaluation. Part B item 754 (09.12.2016).754 Journal of Education, Health and Sport eISSN 2391-8306 7© The Author (s) 2017;This article is published with open access at Licensee Open Journal Systems of Kazimierz Wielki University in Bydgoszcz, PolandOpen Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License(http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.The authors declare that there is no conflict of interests regarding the publication of this paper.Received: 02.01.2017. Revised 16.01.2017. Accepted: 24.01.2017. UDK 577.3 KIRLIANOGRAPHIC INVESTIGATION OF THE ANTHROPOGENIC FACTORS INFLUENCE ON BIOTA M. V. Kurik1, L. A. Pesotskay2, N. V. Glukhova3, L. R. Nikogosyan4 1Ukrainian Institute ecology of man, Kyiv; 2 SE “Dnipropetrovsk Medical Academy of health Ministry of Ukraine”, Dnipro; 3SE “National Mining University”, Dnipro; 4Odessa National Medical University, Odessa SummaryThe energetic interaction between biota objects using kirlianography on film was studied. The positive effect of the Shungite room, unified by green healing clay on the human energy was established. The free-radical reactions in the water spaces followed by photons release in the ultraviolet portion of the spectrum which corresponds to the Kirlian glow. The following criteria for water energy conditions evaluation were used: the width of a crown illumination, the clear tape drives presence in it; the coronal inner region characteristics (presence of blackouts, grain). Completed computer analysis based on the histogram of brightness of pixels used methodology flicker noise spectroscopy. According to it the identified natural water as well as the water from the holy sources parameters were compared with the same in distilled water. The influence of thinking on human bioenergy, water and minerals was established.Key words: Kirlian photography, anthropogenic factors, biosphere
Annihilation of edge dislocations in smectic A liquid crystals
This paper presents a theoretical study of the annihilation of edge dislocations in the same smectic plane in a bulk smectic-A phase. We use a time-dependent Landau-Ginzburg approach where the smectic ordering is described by the complex order parameter psi( r--> ,t) =eta e(iphi) . This quantity allows both the degree of layering and the position of the layers to be monitored. We are able to follow both precollision and postcollision regimes, and distinguish different early and late behaviors within these regimes. The early precollision regime is driven by changes in the phi ( r--> ) configuration. The relative velocity of the defects is approximately inversely proportional to the interdefect separation distance. In the late precollision regime the symmetry changes within the cores of defects also become influential. Following the defect collision, in the early postcollision stage, bulk layer order is approached exponentially in time. At very late times, however, there seems to be a long-time power-law tail in the order parameter fluctuation relaxation
Parity Breaking in Nematic Tactoids
We theoretically investigate under what conditions the director field in a
spindle-shaped nematic droplet or tactoid obtains a twisted, parity-broken
structure. By minimizing the sum of the bulk elastic and surface energies, we
show that a twisted director field is stable if the twist and bend elastic
constants are small enough compared to the splay elastic constant, but only if
the droplet volume is larger than some minimum value. We furthermore show that
the transition from an untwisted to a twisted director-field structure is a
sharp function of the various control parameters. We predict that suspensions
of rigid, rod-like particles cannot support droplets with a parity broken
structure, whereas they could possibly occur in those of semi-flexible,
worm-like particles.Comment: 20 pages, 9 figures, submitted to Journal of Physics: Condensed
Matte
Topology by Design in Magnetic nano-Materials: Artificial Spin Ice
Artificial Spin Ices are two dimensional arrays of magnetic, interacting
nano-structures whose geometry can be chosen at will, and whose elementary
degrees of freedom can be characterized directly. They were introduced at first
to study frustration in a controllable setting, to mimic the behavior of spin
ice rare earth pyrochlores, but at more useful temperature and field ranges and
with direct characterization, and to provide practical implementation to
celebrated, exactly solvable models of statistical mechanics previously devised
to gain an understanding of degenerate ensembles with residual entropy. With
the evolution of nano--fabrication and of experimental protocols it is now
possible to characterize the material in real-time, real-space, and to realize
virtually any geometry, for direct control over the collective dynamics. This
has recently opened a path toward the deliberate design of novel, exotic
states, not found in natural materials, and often characterized by topological
properties. Without any pretense of exhaustiveness, we will provide an
introduction to the material, the early works, and then, by reporting on more
recent results, we will proceed to describe the new direction, which includes
the design of desired topological states and their implications to kinetics.Comment: 29 pages, 13 figures, 116 references, Book Chapte
Endoskeletal structure in Cheirolepis (Osteichthyes, Actinopterygii), An early ray-finned fish
As the sister lineage of all other actinopterygians, the Middle to Late Devonian (Eifelian–Frasnian) Cheirolepis occupies a pivotal position in vertebrate phylogeny. Although the dermal skeleton of this taxon has been exhaustively described, very little of its endoskeleton is known, leaving questions of neurocranial and fin evolution in early ray‐finned fishes unresolved. The model for early actinopterygian anatomy has instead been based largely on the Late Devonian (Frasnian) Mimipiscis, preserved in stunning detail from the Gogo Formation of Australia. Here, we present re‐examinations of existing museum specimens through the use of high‐resolution laboratory‐ and synchrotron‐based computed tomography scanning, revealing new details of the neuro‐cranium, hyomandibula and pectoral fin endoskeleton for the Eifelian Cheirolepis trailli. These new data highlight traits considered uncharacteristic of early actinopterygians, including an uninvested dorsal aorta and imperforate propterygium, and corroborate the early divergence of Cheirolepis within actinopterygian phylogeny. These traits represent conspicuous differences between the endoskeletal structure of Cheirolepis and Mimipiscis. Additionally, we describe new aspects of the parasphenoid, vomer and scales, most notably that the scales display peg‐and‐socket articulation and a distinct neck. Collectively, these new data help clarify primitive conditions within ray‐finned fishes, which in turn have important implications for understanding features likely present in the last common ancestor of living osteichthyans
A study of the luminescence of mechanically treated surfaces of single anthracence crystals
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