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Search Results: 1 - 10 of 3971 matches for " Sergey Tovstonog "
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Joint Temporal Density Measurements for Two-Photon State Characterization
Onur Kuzucu,Franco N. C. Wong,Sunao Kurimura,Sergey Tovstonog
Physics , 2008, DOI: 10.1103/PhysRevLett.101.153602
Abstract: We demonstrate a new technique for characterizing two-photon quantum states based on joint temporal correlation measurements using time resolved single photon detection by femtosecond upconversion. We measure for the first time the joint temporal density of a two-photon entangled state, showing clearly the time anti-correlation of the coincident-frequency entangled photon pair generated by ultrafast spontaneous parametric down-conversion under extended phase-matching conditions. The new technique enables us to manipulate the frequency entanglement by varying the down-conversion pump bandwidth to produce a nearly unentangled two-photon state that is expected to yield a heralded single-photon state with a purity of 0.88. The time-domain correlation technique complements existing frequency-domain measurement methods for a more complete characterization of photonic entanglement in quantum information processing.
An Efficient Numerical Method for Calculation of Elastic and Thermo-Elastic Fields in a Homogeneous Medium with Several Heterogeneous Inclusions  [PDF]
Sergey Kanaun
World Journal of Mechanics (WJM) , 2011, DOI: 10.4236/wjm.2011.12005
Abstract: The work is devoted to calculation of static elastic and thermo-elastic fields in a homogeneous medium with a finite number of isolated heterogeneous inclusions. Firstly, the problem is reduced to the solution of inte-gral equations for strain and stress fields in the medium with inclusions. Then, Gaussian approximating func-tions are used for discretization of these equations. For such functions, the elements of the matrix of the dis-cretized problem are calculated in explicit analytical forms. The method is mesh free, and only the coordi-nates of the approximating nodes are the geometrical information required in the method. If such nodes compose a regular grid, the matrix of the discretized problem obtains the Toeplitz properties. By the calcula-tion of matrix-vector products with such matrices, the Fast Fourier Transform technique may be used. The latter accelerates essentially the process of the iterative solution of the disretized problem. The results of calculations of elastic fields in 3D-medium with an isolated spherical heterogeneous inclusion are compared with exact solutions. Examples of the calculation of elastic and thermo-elastic fields in the medium with several inclusions are presented.
The use of DCEEG to estimate functional and metabolic state of nervous tissue of the brain at hyper- and hypoventilation  [PDF]
Sergey Murik
World Journal of Neuroscience (WJNS) , 2012, DOI: 10.4236/wjns.2012.23027
Abstract: A pilot study has been made of the simultaneous DC potential and total slow electrical activity changes during modeling various metabolic and functional states of the human brain. The multi-electrode DCEEG recordings have been performed during the hyperventilation (frequent deep one-minute long breathing motions) and the hypoventilation (voluntary breath holding). It has been shown that the ischemic state occurring in hyperventilation is accompanied by the negative shift of DC potential and increase in the EEG rhythms amplitude. A distention of brain vessels during hypoventilation (voluntary breath-hold) and an improvement of blood supply and thus improvement of vital and functional state of neurons gave rise to an increase in the EEG rhythm amplitude too, though against a background of a positive DC-potential shift. Obtained results are considered with context the generation of the qualitatively different functional states of brain cells during hyper- and hypoventilation which is reflected in their resting potential and activity. The conducted study show the prospects for DCEEG and the method we used for DCEEG data processing to understand the character of functional and metabolic changes in the nervous tissue.
User-Driven Applications—New Paradigm for Interface Design  [PDF]
Sergey Andreyev
Journal of Software Engineering and Applications (JSEA) , 2013, DOI: 10.4236/jsea.2013.68047

40 years ago the outcome of computer programs was in the form of long listings covered by numbers; even the format of those numbers was determined by developers. Throughout the latest 30 years program views and results are shown in a wide variety of shapes and variants, but all these possibilities are predefined and fixed in code by developers; nothing outside of their approved solutions is allowed. My vision from now on into the future: developers are responsible only for correct work of a program (calculations, link with the database, etc.) and suggest a good default interface but not determine all possible scenarios; only users decide WHAT, WHEN, and HOW to show. This will be a revolution in our interaction with computers, but there are obvious questions. How this step can be made? Do all users need such change? Is it going to be a burden for users or a welcome revolution?

Discovery in Statics  [PDF]
Sergey Makarov
World Journal of Mechanics (WJM) , 2013, DOI: 10.4236/wjm.2013.38034

This article described the opening of a new law in fundamental physics, namely the law of the formation of an endless series of suspension (cable-stayed) networks coatings. Opening relates to the mechanics, section of statics.

Possible Tendencies of Economic Development of Russia  [PDF]
Sergey А. Surkov
Theoretical Economics Letters (TEL) , 2014, DOI: 10.4236/tel.2014.47077

It was proposed to use the sum of production functions of different lifestyles, to describe the changes in the Russian economy. Values of indicators of a power function of Cobb-Douglas were received from approximate formulas on the basis of data from various sources. A good concordance with change process of Russia’s GDP, what permit to predict its behavior in the future, was received.

The Problem of AIDS May Have Already Solved  [PDF]
Sergey Makarov
World Journal of AIDS (WJA) , 2014, DOI: 10.4236/wja.2014.44047
Abstract: This article describes an alternative approach to the problem of AIDS. The author proposes a new theory. In this theory, HIV is not a “classic virus”, but a parasitic program that does not have a material carrier.
Modern Ab-Initio Calculations on Modified Tomas-Fermi-Dirac Theory  [PDF]
Sergey Seriy
Open Journal of Modelling and Simulation (OJMSi) , 2015, DOI: 10.4236/ojmsi.2015.33010
Abstract: Thomas-Fermi theory is an approximate method, which is widely used to describe the properties of matter at various hierarchical levels (atomic nucleus, atom, molecule, solid, etc.). Special development is achieved using Thomas-Fermi theory to the theory of extreme states of matter appearing under high pressures, high temperatures or strong external fields. Relevant sections of physics and related sciences (astrophysics, quantum chemistry, a number of applied sciences) determine the scope of Thomas-Fermi theory. Popularity Thomas-Fermi theory is related to its relative simplicity, clarity and versatility. The latter means that the result of the calculation by Thomas-Fermi theory applies immediately to all chemical elements: the transition from element to element is as simple scale transformation. These features make it to be a highly convenient tool for qualitative and, in many cases, and quantitative analysis.
Xenogamy and Current Obesity Pandemics  [PDF]
Sergey N. Rumyantsev
Open Journal of Genetics (OJGen) , 2011, DOI: 10.4236/ojgen.2011.11001
Abstract: This article unites the results from an integrative reconsideration of actual data about obesity from the viewpoint of recent developments in general pathology, epidemiology, immunology, genetics, and evolution. The focus is on the origin of genetic diversity in obesity manifestations on different levels of the disease. In contrast to the current paradigm of nutritive origin of obesity, the revealed set of evidences shows that the origin of obesity is based on either hereditary or post-infectious incongruence between the regulators of fat metabolism and their receptors. The incongruence may be created either by the destruction of receptors during infection or by genome mutations, which by natural selection, lead both to life-saving incongruence between the infectious agent and its receptor, and simultaneously, in evolution to a life-threatening obesogenic incongruence in the regulator-receptor interaction. The pandemic spread of obesity is induced by xenogamous intercourse between constitutionally incongruent ethnoses, which regulator-receptor evolution has processed at different epidemic conditions. The achieved results have allowed a replenish model for the molecular pathogenesis of obesity to explain the genetics of both obesity and its pandemic spread. The formerly maladroit issues of obesity origin, genetic, pathogenesis, and pandemic spread are transformed in an entire replenished system.
Psyche from within: Three Case Studies  [PDF]
Semyon Ioffe, Sergey Yesin
Psychology (PSYCH) , 2010, DOI: 10.4236/psych.2010.14037
Abstract: A comparative look at the psychological health and the physical health industries uncovers the need for measurable quantitative testing in order to bring the psychological health field into the 21st century. We are using a proven set of subconscious mind testing technologies which revolutionize the quality of services and results in the field of psychological health. These technologies decrease the cost and increase the accuracy and effectiveness of psychological help. We look at three patient case studies to demonstrate the effectiveness of this new approach and familiarize psychological health practitioners and their patients with these technologies.
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