Study of the process e+e−→3(π+π−) in the c.m. energy range 1.5–2.0 GeV with the CMD-3 detector

AbstractThe cross section of the process e+e−→3(π+π−) has been measured using a data sample of 22 pb−1 collected with the CMD-3 detector at the VEPP-2000 e+e− collider. 7956 signal events are selected in the center-of-mass energy range 1.5–2.0 GeV. The measured cross section exhibits a sharp drop near the pp¯ threshold. A first study of dynamics of six-pion production has been performed

Parsing genetically influenced risk pathways: genetic loci impact problematic alcohol use via externalizing and specific risk

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Principles of human rights protection in foreign and home legal policy of the Russian state

The principles of state protection of human rights are stated to be important. The principles of human rights policy being a system are conditional on main state goals and objectives, that is ensuring legal safety and unhindered development of an individual and society. This system is argued to be two-component and to include the principles of government mechanism’s construction and activity and general human rights principles. The principles which are not fixed in the legislation are also of great importance. The legislative fixing of principles of civil servants’ activity concerning the human rights is positively estimated by the authors, notably the priority of rights and freedoms of man and citizen; professionalism and competence of civil servants; availability of information on civil service; cooperation with public associations and citizens; security of civil servants against illegal intrusion into their activity. The facts of departure from impartial justice and disrespectful attitude of law enforcement officers to citizens are stated to be wide-spread. The authors prove the necessity to intensify the control of public authorities’ and officials’ activity, to create conditions of its full transparency for the public. The principles of state protection of human rights are ruling principles of public authority’s organization and activity, stating its essence, social function and orientation on setting high level of legal security of man and citizen, fixed in the international agreements and national legislation. It is proposed to reconsider the principles of Russia’s functioning in the sphere of protecting the rights of citizens and proprietors residing abroad

Plasma decay in air and O<SUB>2</SUB> after a high-voltage nanosecond discharge

International audienceThis paper presents the results of experimental and theoretical studies of an afterglow in room temperature air and O2 excited by a high-voltage nanosecond discharge for pressures between 1 and 10 Torr. We measured time-resolved electron density by a microwave interferometer for initial electron densities in the range (23) × 1012 cm&#8722;3. Discharge uniformity was investigated by optical methods. The balance equations for charged particles and electron temperature were numerically solved to describe the temporal evolution of the densities of electrons and ions in the discharge afterglow. It was shown that the loss of electrons is governed by dissociative and three-body electron recombination with \rm O₂^ ions under the conditions considered. Good agreement between the calculated and measured electron density histories could be obtained only when the rate of three-body recombination was increased by an order of magnitude and when the dependence of the recombination rate on electron temperature was changed. This could testify that the well-understood mechanism of three-body electron recombination with atomic ions could be noticeably modified in the case of molecular ions

Plasma decay in the afterglow of a high-voltage nanosecond discharge in air

International audienceThe decay of air plasma produced by a high-voltage nanosecond discharge at room temperature and gas pressures in the range of 110 Torr was studied experimentally and theoretically. The time dependence of the electron density was measured with a microwave interferometer. The initial electron density was about 10¹2 cm3. The discharge homogeneity was monitored using optical methods. The dynamics of the charged particle densities in the discharge afterglow was simulated by numerically solving the balance equations for electron and ions and the equation for the electron temperature. It was shown that, under these experimental conditions, plasma electrons are mainly lost due to dissociative and three-body recombination with ions. Agreement between the measured and calculated electron densities was achieved only when the rate constant of the three-body electronion recombination was increased by one order of magnitude and the temperature dependence of this rate constant was modified. This indicates that the mechanism for three- body recombination of molecular ions differs from that of the well-studied mechanism of atomic ion recombination

Subjective visual perception of objective fast cyclical deterioration of clearness of the observable television map

При решении прикладной задачи для малокадрового телевидения по восстановлению ТВ стандарта в 25 кадров в секунду с помощью рециркулятора на ПЗС проанализированы особенности зрительного восприятия изображений с циклически изменяющейся четкостью от кадра к кадру.При рішенні прикладної задачі для малокадрового телебачення по відновленню ТВ стандарту в 25 кадрів за секунду за допомогою рециркулятора проаналізовані особливості зорового сприйняття зображень з циклічно змінюваною чіткістю від кадру до кадру.At a solution of the applied task for low-frame-rate television system on restoring ТV of the standard in 25 frames per one second with the help recirculation the singularities of visual perception of the maps with cyclicalally varying clearness from a frame to a frame are parsed

Air-guided photonic-crystal-fiber pulse-compression delivery of multimegawatt femtosecond laser output for nonlinear-optical imaging and neurosurgery

Large-core hollow photonic-crystal fibers (PCFs) are shown to enable a fiber-format air-guided delivery of ultrashort infrared laser pulses for neurosurgery and nonlinear-optical imaging. With an appropriate dispersion precompensation, an anomalously dispersive 15-m-core hollow PCF compresses 510-fs, 1070-nm light pulses to a pulse width of about 110 fs, providing a peak power in excess of 5 MW. The compressed PCF output is employed to induce a local photodisruption of corpus callosum tissues in mouse brain and is used to generate the third harmonic in brain tissues, which is captured by the PCF and delivered to a detector through the PCF cladding. © 2012 American Institute of Physics