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Search Results: 1 - 10 of 130457 matches for " V. V. Dmitrenko "
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Analysis of Joint Ventures Financial State
Alla V. Dmitrenko
European Researcher , 2013,
Abstract: The article describes the basic techniques for the analysis of businesses financial state and methods that were adapted for the joint ventures activities, analyses joint venture financial state, makes conclusions and submits reasonable proposals for improvement of its future activities
Simulation of Gamma-Ray and Neutron Spectrometers for Microsatellite Missions  [PDF]
Masayuki Naito, Nobuyuki Hasebe, Junya Ishii, José A. Matias-Lopes, Valery V. Dmitrenko, Christian W?hler, Kyeong Ja Kim
Journal of Geoscience and Environment Protection (GEP) , 2018, DOI: 10.4236/gep.2018.68009
Abstract: Microsatellites have recently opened windows of frequent and low cost missions for planetary exploration. The performance of gamma-ray and neutron spectrometers on future microsatellite missions is simulated to assess the possibility of observation of hydrogen and major elements, given their concentration on the observation target. The measured elemental abundance will provide important geological constraints, and some of them may serve as space resources. Four different types of target bodies with various hydrogen concentrations in the range of 0 - 20,000 ppm are assumed as target compositions; Earth’s core, C-type, S-type and Martian meteorites. Gamma-ray and neutron emission rates show unique footprints that are related to the different elemental compositions. The starting point is the solid angle subtended between observation target and spectrometers that allow estimating the gamma-ray and neutron count rates emitted by the celestial bodies. In this work, three types of gamma-ray detectors; high-purity germanium (HPGe), CeBr3 and LaBr3(Ce), a neutron spectrometer combining a lithium glass scintillator with a boron loaded plastic scintillator and a dual mode spectrometer Cs2LiYCl6(Ce) (CLYC) are simulated, focusing on their observation backgrounds as a model case for microsatellite based measurements. The background count level of both gamma-ray (except for the LaBr3 detector) and neutron count rates was negligible under these particular conditions. The gamma-ray detectors were compared by the figure of merit, which was determined by their efficiency and energy resolution. It was found that each detector has unique advantages. The HPGe detector has the highest figure of merit due to its excellent energy resolution, whereas the CLYC detector is low in weight and power consumption due to its dual sensitivity to gamma-ray and neutron. The CeBr3 detector is an intermediate choice. The neutron count rates are calculated separately in three energy ranges, i.e. , thermal (<0.5 eV), epithermal (0.5 eV - 500 keV), and fast (>500 keV), as a function of the hydrogen concentration in the 0 - 20,000 ppm range. The thermal and epithermal neutron count rates are found to decrease with hydrogen concentration, while the fast neutron count rate increases with the target average atomic mass. The optimal detector should be decided by the mission restraints on mass, power consumption, and heat thermal design.
Case Report of Management Problem of Juvenile Myoclonic Epilepsy  [PDF]
Ivan P. Artyukhov, Olga S. Shilkina, Natalia A. Shnayder, Diana V. Dmitrenko, Elena N. Bochanova, Evgeniya A. Shapovalova, Irina G. Strotskaya
Case Reports in Clinical Medicine (CRCM) , 2016, DOI: 10.4236/crcm.2016.57040
Abstract: Juvenile myoclonic epilepsy (JME) is one of the most common types of idiopathic generalised epilepsy. It starts in teenage years, yet it is frequently misdiagnosed or diagnosed very late, thereby resulting in inadequate therapy plan and worsening of symptoms. Timely diagnosis of JME is crucial for the correct management of symptoms and prevention of disease development. In this case report we describe a case of a 33-year-old woman who did not receive appropriate care due to a late diagnosis of her JME condition.
Problems of Rational Therapy for Epilepsy during Pregnancy  [PDF]
Diana V. Dmitrenko, Natalia A. Shnayder, Ilia A. Kiselev, Andrej V. Shulmin, Natalia V. Zhirova, Evgeniya A. Shapovalova, Elena A. Kantimirova, Elena N. Bochanova, Olga F. Veselova, Yulia S. Panina, Anastasiya V. Muravieva
Open Journal of Obstetrics and Gynecology (OJOG) , 2014, DOI: 10.4236/ojog.2014.49072
Abstract:

Epilepsy is one of the most frequent neurological disorders. In these circumstances, more than 25% of the patients are women of reproductive age. The aim of our research was to analyze the effectiveness and safety of antiepileptic therapy in women with epilepsy during pregnancy and to analyze the pregnancies’ outcomes. We included in our research 121 pregnancies of 101 women aged at the moment of childbearing about 26.9 ± 4.57 years old. Idiopathic forms of epilepsy were predominant among all causes—47.1% (р < 0.01). Of all cases, 65.4% remained seizure-free from generalized tonic-clonic seizures (GTCS), including 69.6% of all idiopathic epilepsy cases and 68.6% among symptomatic ones. The antiepileptic drugs (AED) dosages were exceeding teratogenic level at the moment of conception in 54.7% of the cases. Worse control of epileptic seizures was associated with Benzobarbital (66.7%) and Lamotrigine (50.0%). Women with epilepsy did not receive specialized neurological therapy before conception in most cases, which leaded to the usage of AED teratogenic doses and less effectiveness of AED during pregnancy. It is necessary to plan the pregnancy and prescribe rational treatment for epilepsy starting at the stage of planning and during gestation in order to obtain a better seizures control and to decrease congenital disorders risk in fetus.

Perspectives to measure neutrino-nuclear neutral current coherent scattering with two-phase emission detector
RED Collaboration,D. Yu. Akimov,I. S. Alexandrov,V. I. Aleshin,V. A. Belov,A. I. Bolozdynya,A. A. Burenkov,A. S. Chepurnov,M. V. Danilov,A. V. Derbin,V. V. Dmitrenko,A. G. Dolgolenko,D. A. Egorov,Yu. V. Efremenko,A. V. Etenko,M. B. Gromov,M. A. Gulin,S. V. Ivakhin,V. A. Kantserov,V. A. Kaplin,A. K. Karelin,A. V. Khromov,M. A. Kirsanov,S. G. Klimanov,A. S. Kobyakin,A. M. Konovalov,A. G. Kovalenko,V. I. Kopeikin,T. D. Krakhmalova,A. V. Kuchenkov,A. V. Kumpan,E. A. Litvinovich,G. A Lukyanchenko,I. N. Machulin,V. P. Martemyanov,N. N. Nurakhov,D. G. Rudik,I. S. Saldikov,M. D. Skorokhatov,V. V. Sosnovtsev,V. N. Stekhanov,M. N. Strikhanov,S. V. Sukhotin,V. G. Tarasenkov,G. V. Tikhomirov,O. Ya. Zeldovich
Physics , 2012, DOI: 10.1088/1748-0221/8/10/P10023
Abstract: We propose to detect and to study neutrino neutral current coherent scattering off atomic nuclei with a two-phase emission detector using liquid xenon as a working medium. Expected signals and backgrounds are calculated for two possible experimental sites: Kalinin Nuclear Power Plant in the Russian Federation and Spallation Neutron Source at the Oak Ridge National Laboratory in the USA. Both sites have advantages as well as limitations. However the experiment looks feasible at either location. Preliminary design of the detector and supporting R&D program are discussed.
Nonsmooth Optimization Algorithms in Some Problems of Fracture Dynamics  [PDF]
V. V. Zozulya
Intelligent Information Management (IIM) , 2010, DOI: 10.4236/iim.2010.211073
Abstract: Mathematical statement of elastodynamic contact problem for cracked body with considering unilateral restrictions and friction of the crack faces is done in classical and weak forms. Different variational formulations of unilateral contact problems with friction based on boundary variational principle are considered. Nonsmooth optimization algorithms of Udzawa’s type for solution of unilateral contact problem with friction have been developed. Convergence of the proposed algorithms has been studied numerically.
Precessing Ball Solitons as Self-Organizing Systems during a Phase Transition in a Ferromagnet  [PDF]
V. V. Nietz
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.410A3010
Abstract:

Precessing ball solitons (PBS) in a ferromagnet during the first order phase transition is induced by a magnetic field directed along the axis of anisotropy, while the action of the periodic field perpendicular to the main magnetic field has been analyzed. Under these conditions, the characteristics of arising equilibrium PBS are uniquely determined by the frequency of the periodic field, but the solitons with other frequencies are impossible. For such structure, the entropy increase connected with dissipation is compensated by the decrease of the entropy due to the external periodic field. It is shown that the equilibrium PBS are essentially the “self-organizing systems” that can arise spotaneously in a metastable state of ferromagnet.

Movement of Self-Organizing Solitons in Ferromagnet  [PDF]
V. V. Nietz
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.610155
Abstract: Precessing ball solitons (PBS) in a ferromagnet during the first order phase transition induced by a magnetic field directed along the axis of anisotropy, while the additional action of high-frequency field perpendicular to the main magnetic field, are analyzed. It is shown that the spatial motion of solitons, associated with thermal fluctuations in the crystal, does not destroy the equilibrium of self-organized PBS.
Lα Line of Dark Positronium as a Nongravitational Detection of DM  [PDF]
V. Burdyuzha, V. Charugin
Journal of Modern Physics (JMP) , 2015, DOI: 10.4236/jmp.2015.613187
Abstract: An attempt to predict the new atomic dark matter lines is done on the example of a dark lepton atom-positronium. Its Layman-alpha line with the energy near 3 GeV may be observable if the appropriate conditions are realized. For this we have studied a γ-ray excess in the center of our galaxy. In principle, this excess may be produced by the Lα line of a dark positronium in the medium with Compton scattering. The possibility of observations of an annihilation line (E~300 TeV) of dark positronium is also predicted. Other proposals to observe the atomic dark matter are shortly described. Besides, Hα line (1.3μ) of usual positronum must be observable in the direction on the center of our galaxy.
Randomization of Energy and Momentum in Statistical Mechanics  [PDF]
V. V. Paranjape
Journal of Modern Physics (JMP) , 2015, DOI: 10.4236/jmp.2015.615223
Abstract: Particle-particle collisions in materials give rise to a particle distribution in energy and momentum in such a way that a most probable distribution is realized. I will show that an evaporating liquid generates a molecular imbalance in the equilibrium energy distribution. The molecular collisions by their inherent nature are able to repair the imbalance and in so doing it is shown that the liquids cool down. Similarly an external electric field creates substantial imbalance in the momentum distribution for the electrons in ionic semiconductors. Electron-electron collisions are able to restore the imbalance and as a consequence, similar to the evaporating liquid, the electron gas loses thermal energy and cools down.
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