The process of bubble growth inside an intensively evaporating sessile liquid drop on a heated structured black silicon has been studied. Experiments are carried out with volatile fluids FC-72, HFE ...7100, ethanol, and water. The schlieren-based method was developed for investigations of the bubble growth inside a liquid droplet. The contact line velocity was measured during the droplet evaporation, including the case of a growing bubble inside the drop. The velocities of the contact line for droplet evaporation with/without bubble were compared. The contact line instability was detected emerging also due to the developed substrate structure. This can lead to an increase of local flows in the microregion and to significant heat transfer enhancement.
Effectiveness of a new stage equation for identifying and analyzing individual stages of compaction was assessed. Results revealed that the newly developed equation describes correctly and accurately ...the experimental compaction curves, which considers the periodic nature of the process and enables the determination of characteristic transition points between stages, whereas. the determination coefficient is close to unity. On the basis of the use of the basic and stage compaction equations, methods were developed to determine the stabilizing pressure, briquettability, and stiffness of the charge. Anew attribute was proposed for the energy classification of briquetted materials.
A method has been proposed to extract the shock adiabat of metals, including the thermal component of the pressure, from the measured decay characteristics of a strong shock wave formed in a planar ...target irradiated by an intense laser pulse. The time of arrival of hydrodynamic perturbation initiated by the 70-ps laser pulse with an intensity of 1–100 TW/cm
2
at the rear surface of foils with different thicknesses has been measured. The theory of decay of a plane shock wave in metals has been developed for the pressure range of 0.1–10 TPa. To verify theoretical conclusions, the numerical simulation of shock wave processes under study has been performed with wide-range equations of state of matter.
An analytical method for preliminary assessment of the compactability of charges made from fine materials of the mining and smelting industry is developed. The method allows establishing the ...functional dependence of the density of a briquette on the applied pressure without experiments on the compression of a charge in special pressure equipment. The method involves the use of a new compaction model and the relationship between the compact density at a given pressure and the physical and mechanical properties of a charge (loose bulk density, tapped bulk density, true density of particles) for dry charges and charges mixed with water or liquid binder. The method can be used in briquette production when choosing processing modes and creating pressure equipment.
({5-4,6-Di(aziridin-1-yl)-1,3,5-triazin-2-ylamino}-2,2-dimethyl-1,3-dioxan-5-yl)-methyl 2-(5-phenyl-2
H
-tetrazol-2-yl)acetate was synthesized and characterized. The interaction of the obtained ...tetrazole-containing 2-amino-4,6-di(aziridin-1-yl)-1,3,5-triazine derivative with DNA was studied by UV spectrophotometry, circular dichroism spectroscopy, and isothermal calorimetry. The values of binding constants (9.65·10
8
L mol
−1
, UV spectrophotometry; 4.08·10
8
L mol
−1
, isothermal calorimetry) of the 1,3,5-triazine derivative to DNA attests to efficient binding and formation of stable associates with the biopolymer. The addition of the tetrazole-containing 1,3,5-triazine derivative to a DNA solution has virtually no effect on the DNA melting point. The tetrazole-containing 1,3,5-triazine derivative exhibits a cytostatic effect on SK-HEP-1 human hepatic adenocarcinoma cells (half-maximal inhibitory concentration IC
50
22.2 mmol L
−1
) and T98G human glioblastoma cells (IC
50
44.9 mmol L
−1
).
We developed the model of the internal phonon bottleneck to describe the energy exchange between the acoustically soft ultrathin metal film and acoustically rigid substrate. Discriminating phonons in ...the film into two groups, escaping and nonescaping, we show that electrons and nonescaping phonons may form a unified subsystem, which is cooled down only due to interactions with escaping phonons, either due to direct phonon conversion or indirect sequential interaction with an electronic system. Using an amplitude-modulated absorption of the sub-THz radiation technique, we studied electron-phonon relaxation in ultrathin disordered films of tungsten silicide. We found an experimental proof of the internal phonon bottleneck. The experiment and simulation based on the proposed model agree well, resulting in τe−ph∼140–190 ps at TC=3.4K, supporting the results of earlier measurements by independent techniques.
The binomial distribution is often used in modeling, including in applied climatology, when assessing the likelihood of adverse or dangerous climate-related impacts. The article outlines an algebraic ...algorithm for obtaining such estimates based on climate monitoring data or modeling data. Using only algebraic operations in calculations minimizes calculation time, which is important when performing detailed global assessments. As an example of such a calculation, the result of an assessment of the global climatic range of a dangerous insect pest of forest and garden trees and shrubs, the gypsy moth, is given.
The Multi-Purpose Detector (MPD) is constructing to study the properties of the hot and dense matter created in heavy-ion collisions in the energy range of 4-11 A*GeV where the maximum baryonic ...density is expected. The crucial detector in the new experimental setup is a large-sized barrel electromagnetic calorimeter (ECal), designed for precise spatial and energy measurements for photons and electrons. Taking into account the requirements of high energy resolution, dense active medium with the small Moliere radius, and high segmentation of ECal, the Shashlyk-type electromagnetic calorimeter with projective geometry has been selected. The mass production of ECal modules has been started. In this talk, we report about methods and technologies for the quality control of ECal modules and their components.
Experiments for verification of a functional dependence of the ablation pressure on the irradiated surface of a target upon the laser intensity in a range from 1.2 to 350 TW cm2 have been carried ...out. For that, at some intensities of the laser irradiation, time intervals between the laser pulse maximum and the moment of the shock-wave front arrival to the rear surface of the target were measured, which are dependent on the ablation pressure. Two schemes of the measurements were used. At the first scheme, at higher laser intensities, the front arrival moment is determined via an electron-optical camera when the rear surface begins glowing. At the second scheme, the front arrival moment is recorded when a probe laser pulse changes the character of the reflection by the rear surface of the irradiated target. Results of measurements are in agreement with the ablation pressure dependence upon the laser pulse intensity within 20%.
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