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Search Results: 1 - 10 of 985 matches for " Nikolay Lukerchenko "
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Numerical model of spherical particle saltation in a channel with a transversely tilted rough bed
Nikolay Lukerchenko, Siarhei Piatsevich, Zdenek Chara, Pavel Vlasak
Journal of Hydrology and Hydromechanics , 2009, DOI: 10.2478/v10098-009-0017-x
Abstract: This paper deals with the numerical simulation of spherical particle saltation in a channel with a rough transversely tilted bed. The numerical model presented is based on the 3D model of spherical particle saltation developed by the authors, which takes into account the translational and rotational particle motion. The stochastic method and the concept of a contact zone were used for the calculation of a particle trajectory and its dependence on the bed lateral slope, particle diameter, and shear velocity. The effect of the bed lateral slope results in a deviation of the particle trajectory from the downstream direction. Some examples of the calculation are presented. The trajectories of the saltating particles starting their movements from one point were calculated and it was shown that they are of random character and together create a bundle or fascicle of trajectories. It was found that the centrelines of the bundles can be approximated by the straight lines for low and moderate values of the bed transverse slope, i.e. slopes less than 20°. The angle of deviation of the centreline from the downstream direction increases when the bed lateral slope and/or the particle diameters increase. However, with increasing shear velocity, the deviation angle decreases. Due to the lateral bed slope the particles are sorted according to their size, and the criteria for sorting particles were defined. An example of the particle sorting was calculated and the separable and non-separable regions were determined.
Structures, Fields and Methods of Identification of Nonlinear Static Systems in the Conditions of Uncertainty  [PDF]
Nikolay Karabutov
Intelligent Control and Automation (ICA) , 2010, DOI: 10.4236/ica.2010.12007
Abstract: The field of structures on set of secants is offered and methods of its construction for various classes of one-valued nonlinearities of static systems are considered. The analysis of structural properties of system is fulfilled on specially generated set of data. Representation on which modification it is possible to judge to nonlinear structure of static systems is introduced. It is shown, that structures of nonlinear static systems have a special V-point. The adaptive algorithm of an estimation of structure of nonlinearity on a class poly-nomial function is offered.
User Interface for People with Autism Spectrum Disorders  [PDF]
Nikolay Pavlov
Journal of Software Engineering and Applications (JSEA) , 2014, DOI: 10.4236/jsea.2014.72014
Abstract:

This paper describes the requirements for building accessible user interface for users with autism spectrum disorders (ASD) and presents the user interface (UI) of Open Book, a reading assistive tool for people with ASD. The requirements are extracted from both existing research on improving reading comprehension for people with ASD, and from the feedback of users and clinical professionals. The findings are applied in practice to create the user interface of Open Book tool. Key screens of the user interface are presented. It is implied that the features of the UI for people with ASD can be successfully applied to improving overall accessibility of any graphical user interface.

Bilaterally Symmetrical Transformation between Independent Operators and Rotations  [PDF]
Nikolay Raychev
Journal of Quantum Information Science (JQIS) , 2015, DOI: 10.4236/jqis.2015.53010
Abstract: This report describes an approach for representation of quantum operators through rotations and rotation through quantum operators. The approach of the proposed method transforms rotation in a kind of a unitary matrix that corresponds to the rotation. Operations with qubits are very similar to the rotation, but with an added phase coefficient. This fact is used to create a process for rotation between unitary matrices. This approach could be used to modifying the controls to apply in a different basis.
Formalized Operators with Phase Encoding  [PDF]
Nikolay Raychev
Journal of Quantum Information Science (JQIS) , 2015, DOI: 10.4236/jqis.2015.53014
Abstract: In this article the concept of phase encoding/decoding is used to analyze and formalize a simple quantum algorithm—the Deutsch’s algorithm. The algorithm is formalized in two different ways through an analysis, based on phase encoding/decoding, carried out by the formalized elementary operators developed by the author of this article. Concrete examples of different possible realizations of the formalized with Raychev’s operators Deutsch’s algorithms are offered.
On the Question of Defining the Association Constants by the Method of Fluorescence Quenching  [PDF]
Nikolay L. Lavrik, Nikolay M. Bazhin
American Journal of Analytical Chemistry (AJAC) , 2014, DOI: 10.4236/ajac.2014.516113
Abstract: A study is made on the previously ignored problem of the dependence of a static fluorescence quenching Stern-Volmer constant Ksv on the initial concentration of [F]0 fluorophore F. This correlation is shown to exist. It is concluded that the Stern-Volmer quenching constant may be used as association constant K only with \"\".
Evaluation of Safety and Efficacy of the MaximusTM System for Facial Wrinkles  [PDF]
Nikolay Potekaev,Olga Zhukova
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2013, DOI: 10.4236/jcdsa.2013.32024
Abstract: Introduction: There is a growing demand for non-invasive methods with no down time and minimal risk for facial skin rejuvenation and treatment of wrinkles. The Maximus system, based on TriLipo technology, combines radiofrequency and Dynamic Muscle Activation (DMA). We evaluated the safety and efficacy of the MaximusTM system for the treatment of facial wrinkles. Methods: Twenty women received 8 weekly treatments for facial wrinkles using the Maximus system. Treatment efficacy was assessed by comparing pre- and post-treatment photographs, assessing skin characteristics using the 3D Visioscan system, assessing skin microtopography using the DUB ultrasonic scanning system, assessing microcirculation conditions of facial skin using Laser Doppler Flowmetry (LDF) and subjective evaluation of skin improvement. Results: No adverse events were observed. Following the treatments, positive changes in skin flakiness (scaliness), roughness, smoothness and wrinkles were demonstrated using Visioscan. A thickening of the epidermal-dermal layer and increased structural homogeneity were observed by ultrasound, hyperechogenicity was increased and areas of hypoechogenicity reduced. Microcirculation was improved, corresponding with a positive trend for improved skin characteristics. Conclusions: The Maximus system powered by the TriLipo technology is a non-invasive, effective, safe, and virtually painless treatment for reduction of wrinkles and facial skin rejuvenation.
Evaluation of Safety and Efficacy of the MaximusTM System for Facial Wrinkles  [PDF]
Nikolay Potekaev, Olga Zhukova
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2013, DOI: 10.4236/jcdsa.2013.32024
Abstract:

Introduction: There is a growing demand for non-invasive methods with no down time and minimal risk for facial skin rejuvenation and treatment of wrinkles. The Maximus system, based on TriLipo technology, combines radiofrequency and Dynamic Muscle Activation (DMA). We evaluated the safety and efficacy of the MaximusTM system for the treatment of facial wrinkles. Methods: Twenty women received 8 weekly treatments for facial wrinkles using the Maximus system. Treatment efficacy was assessed by comparing pre- and post-treatment photographs, assessing skin characteristics using the 3D Visioscan system, assessing skin microtopography using the DUB ultrasonic scanning system, assessing microcirculation conditions of facial skin using Laser Doppler Flowmetry (LDF) and subjective evaluation of skin improvement. Results: No adverse events were observed. Following the treatments, positive changes in skin flakiness (scaliness), roughness, smoothness and wrinkles were demonstrated using Visioscan. A thickening of the epidermal-dermal layer and increased structural homogeneity were observed by ultrasound, hyperechogenicity was increased and areas of hypoechogenicity reduced. Microcirculation was improved, corresponding with a positive trend for improved skin characteristics. Conclusions: The Maximus system powered by the TriLipo technology is a non-invasive, effective, safe, and virtually painless treatment for reduction of wrinkles and facial skin rejuvenation.

Dense Fractal Networks, Trends, Noises and Switches in Homeostasis Regulation of Shannon Entropy for Chromosomes’ Activity in Living Cells for Medical Diagnostics  [PDF]
Nikolay E. Galich
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.411A2006
Abstract:

We analyze correlations and patterns of oxidative activity of 3D DNA at DNA fluorescence in complete sets of chromosomes in neutrophils of peripheral blood. Fluorescence of DNA is registered by method of flow cytometry with nanometer spatial resolution. Experimental data present fluorescence of many ten thousands of cells, from different parts of body in each population, in various blood samples. Data is presented in histograms as frequency distributions of flashes in the dependence on their intensity. Normalized frequency distribution of information in these histograms is used as probabilistic measure for definition of Shannon entropy. Data analysis shows that for this measure of Shannon entropy common sum of entropy, i.e. total entropy E, for any histogram is invariant and has identical trends of changes all values of E (r) = lnr at reduction of rank r of histogram. This invariance reflects informational homeostasis of chromosomes activity inside cells in multi-scale networks of entropy, for varied ranks r. Shannon entropy in multi-scale DNA networks has much more dense packing of correlations than in small world networks. As the rule, networks of entropy differ by the mix of normal D < 2 and abnormal D > 2 fractal dimensions for varied ranks r, the new types of fractal patterns and hinges for various topology (fractal dimension) at different states of health. We show that all distributions of information entropy are divided on three classes, which associated in diagnostics with a good health or dominants of autoimmune or inflammatory diseases. This classification based on switching of stability at transcritical bifurcation in homeostasis regulation. We defined many ways for homeostasis regulation, coincidences and switching patterns in branching sequences, the averages of H

Invariance and Noises of Shannon Entropy for Information on Oxidative Activity of DNA in All Living Cells for Medical Diagnostics  [PDF]
Nikolay E. Galich
American Journal of Operations Research (AJOR) , 2014, DOI: 10.4236/ajor.2014.42008
Abstract:

We analyze oxidative activity of DNA due to fluorescence of chromosomes inside cells, using flow cytometry method with nanometer spatial resolution. Statistics of fluorescence is presented in histogram as frequency distributions of flashes in the dependence on their intensity and in distributions of Shannon entropy, which was defined on the base of normalized distribution of information in original histogram for frequency of flashes. We show that overall sum of entropy, i.e. total entropy E , for any histogram is invariant and has identical trends of changes all values of E(r) = lnr at reduction of histogram’ rank r. This invariance reflects informational homeostasis of chromosomes activity in multi-scale networks of entropy inside all cells in various samples of blood for DNA inside neutrophils, lymphocytes, inside all leukocytes of human and inside chicken erythrocytes for various dyes, colors and various excitations of fluorescence. Informational homeostasis of oxidative activity of 3D DNA in the full set of chromosomes inside living cells exists for any Shannon-Weaver index of biodiversity of cells, at any state of health different beings. Regulation perturbations in information activity DNA provides informational adaptability and vitality of cells at homeostasis support. Noises of entropy, during regulation of informational homeostasis, depend on the states of health in real time. The main structural reconstructions of chromosomal correlations, corresponding to self-regulation of homeostasis, occur in the most large-scale networks of entropy, for rank r<32. We show that stability of homeostasis is supported by activity of all 46 chromosomes inside cells. Patterns, hidden switching and branching in sequences of averages of H?lder and central moments for noises in regulation of homeostasis define new opportunities in diagnostics of health and immunity. All people and all aerobic beings have one overall homeostatic level for countdown of information activity of DNA inside cells. We noted very bad and dangerous properties of artificial cells with other levels of informational homeostasis for all aerobic beings in foods, medical treatment and in biotechnologies.

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