Открытый доступ
Доступ предоставлен
Только для подписчиков
Том 45, № 9 (2018)
- Год: 2018
- Статей: 7
- URL: https://journals.rcsi.science/1068-3356/issue/view/14137
Article
Oscillatory Motion of Microdroplets of a Droplet Cluster in a Linearly Nonuniform Electric Field
Аннотация
The forces acting on freely levitating water microdroplets in the structure found 15 years ago and called the droplet cluster (A. A. Fedorets, 2004) are considered. It is shown that lowfrequency vertical damping microdroplet oscillations can take place in such a cluster near the equilibrium position, which also exist in the case of instantaneous turn-on of an external electric field. These oscillations are considered from the viewpoint of the Fourier analysis.
257-262
Plasma Discharge in Liquid Phase Media under Ultrasonic Cavitation as a Technique for Synthesizing Gaseous Hydrogen
Аннотация
It is shown that low-temperature plasma initiated in liquid-phase media in the discharge gap between electrodes can efficiently decompose hydrogen-containing molecules of organic compounds with the formation of gaseous products in which the hydrogen fraction is more than 90% (according to gas chromatography data). Preliminary estimations of the energy efficiency calculated taking into account the hydrogen and source material combustion heat and electric power expenditures showed the efficiency of the order of 60–70% depending on the source mixture composition. The discharge voltage and current were theoretically calculated in the process simulation whose data are in agreement with experimental results.
263-266
Condensation Instability in Partially Ionized Plasma in a Magnetic Field
Аннотация
The occurrence conditions of the condensation instability in heat-releasing partially ionized plasma in an external magnetic field with an induction vector normal to the direction along which a perturbation occurs are considered. Linear equations describing isobaric perturbation dynamics in the two-liquid plasma model are derived. Using these equations, a dispersion relation for condensation modes is derived and their time increments are calculated for various degrees of plasma ionization and magnetic fields.
267-271
Features of Laser Through-Cutting of Silicate Glass by a Fiber Ytterbium Laser
Аннотация
Some principal aspects of silicate glass cutting by controlled laser through thermal cleavage are considered. In particular, it is shown that the cutting speed in the case of ytterbium fiber laser radiation with a wavelength of 1.065 μm lying in fact in the glass transmission range (more precisely, in the low absorption region) depends linearly on the laser power. It is shown that the glass end face takes various geometrical shapes under various conditions of bulk heating and cooling. Therefore, to obtain a homogeneous end face, it is required to stabilize both the laser radiation power and the laser beam speed at a corresponding laser beam geometry in the cut region. Methods for obtaining various cross section shapes of the glass end face and methods for obtaining blunt edges of end faces are presented.
272-278
Mass Spectrometry Profiling of the Protein Composition of Blood Plasma of Colorectal Cancer Patients
Аннотация
The objective of the study is themass spectrometry analysis of the protein composition in blood plasma samples of large intestine cancer patients. Protein profiles of 58 blood plasma samples of large intestine cancer patients and healthy volunteers are analyzed using ultrahigh-resolution panoramic mass spectrometry. It is shown that the coincidence of identifications in the protein composition samples of intestine cancer patients and healthy men is 60–80%. Samples of intestines cancer patients contain proteins involved in the interaction with ribonucleic acid, proteins, and lowmolecular substrata.
279-281
g-Factor Calculation in Small Quantum Dots
Аннотация
It is shown that the effective Lande splitting factor or g-factor of electrons localized on heterostructures such as small quantum dots is always formed as a difference of two values. The first of themrelates to thematerial of the dot itself and critically depends on its sizes and shape; the second one relates to the barriermaterial (surrounding matrix); therewith, the dependence on the latter does not disappear at any dot sizes. The known (k, p) Kane theory defining the renormalization of electron mass and g-factor in bulk semiconductors, is modified for small quantum dots with “incomplete” band structure. Specific calculations of the electron ground state energy and g-factor are performed for the covariant InAs/AlSb heterostructure not localizing holes and, hence, capable of forming pure one-electron states (prototypes of solid-state qubits).
282-286
Improvement of the Mathematical Model for Determining the Dose for the TV-Type Detector in Proton Dosimetry
Аннотация
The results on the improvement of the mathematical model for calculating the TV-type detector are presented. The parameters of the analytical formula valid for proton energies from 60 to 200 MeV, based on the combination of parabolic cylinder functions and consistent with numerical methods and new experimental data, are determined.
287-290