Ce-doped (Pb, Gd)3(Al, Ga)5O12 single crystalline garnet films were grown using liquid-phase epitaxy method from supercooled PbO–B2O3-based melt solutions on substrates from Gd3Ga5O12 and Gd3Al2.26Ga2.74O12 single crystals. Optical absorption and photo- and cathodoluminescent properties of these epitaxial garnet films were studied. Ce-doped (Pb, Gd)3(Al, Ga)5O12 garnet films can be used as a fast phosphor in the design of a PIF-01 electron-optical converter.

A single-phase physico-mathematical model of a high-speed waterjet forming process that uses the underwater abrasive waterjet cutting technology while an abrasive-liquid flow under a pressure ranging from 60 to 80 MPa passes through the jet-forming path of a mobile abrasive waterjet machine has been developed. The results of a numerical experiment are presented. It has been shown that the main structural parameters of the internal profile of the jet-forming element (the profile of the focusing cavity, diameter and length of the output-channel) influence the geometric and kinematic parameters of the formed jet and the consumption of the hydro-abrasive suspension.

We substantiate the recommendations for improving the efficiency of hydro- and hydroabrasive cutting of the honeycomb structures that are widely used in aircraft and rockets, obtained by numerical solving of the spatial dynamic problem with allowance for the physico-mechanical and kinematic parameters of a high-speed jet, the physico-mechanical and structural parameters of the treated honeycomb structure, and the parameters of the technological treatment (feeding and the impact angle of the jet with the face surface of the blanks). A physico-mathematical model and a method of numerical analysis of the process have been developed. The influence of the above parameters on the quality of the surfaces of the treated blanks is illustrated. The results of the calculations are compared with the experimental data.

The optical absorption and photoluminescence properties of cerium-activated (Pb,Gd)3(Al,Ga)5O12 epitaxial films are studied. The films are grown on single-crystal (111)-oriented Gd3Ga5O12 substrates by liquid-phase epitaxy from supercooled PbO – B2O3 melt solutions at different concentrations of gadolinium, cerium, and aluminium oxides in the charge. The photoluminescence band of Ce3+ ions is shown to peak at 532 nm. The highest cathodoluminescence yield of about 51500 photons MeV−1 at a decay time of the slow component of 61.0 ns (light yield fraction 68%) is found for the Pb0.01Ce0.03Gd2.96Al3.14Ga1.86O12 film, grown from melt solution with gadolinium oxide, cerium oxide, and aluminium oxide concentrations of 0.4, 0.2, and 4.5 mol % in the charge, respectively. Epitaxial films with these spectroscopic characteristics are promising for application in scintillation screens.

This paper describes the principles of visualization and analysis of thermal fields generated by different physiological processes around the facial area and in the environment. The dynamics of these fields was studied and their possible application for quantitative evaluation of psychophysical parameters is analyzed using infrared thermography with high spatial and temporal resolution. A software module has been developed and tested for combining infrared and visible camera images. A technique was proposed for complex recording and analysis of central and peripheral nervous activities using a thermal camera that captures three types of temperature fields that vary with time around the facial area: exhaled gas flows, cutaneous blood circulation, and sweat gland activity.

Over the past few years, there has been an increased interest in automatic facial behavior analysis and understanding.We present OpenFace -an open source tool intended for computer vision and machine learning researchers, affective computing community and people interested in building interactive applications based on facial behavior analysis.OpenFace is the first open source tool capable of facial landmark detection, head pose estimation, facial action unit recognition, and eye-gaze estimation.The computer vision algorithms which represent the core of OpenFace demonstrate state-of-the-art results in all of the above mentioned tasks.Furthermore, our tool is capable of real-time performance and is able to run from a simple webcam without any specialist hardware.Finally, OpenFace allows for easy integration with other applications and devices through a lightweight messaging system.

Fabrication details and basic characteristics of a set of novel multimode hafnia-yttria-alumina-silicate (HYAS) core-glass based fibers, one of which is co-doped with bismuth (Bi), for the mid-IR (> 2 µm) spectral range are reported. It is demonstrated that fibers of this type possess low fundamental loss in the spectral range beyond 2 µm, lowered by fewer times as compared to conventional silica-based ones, even at moderate (units of mol.%) co-doping with hafnium. This makes them attractive for versatile mid-IR applications. Furthermore, HYAS core-glass fiber co-doped with Bi is revealed to have all the signs of ‘active’ (fluorescing) Bi-related centers, thus being suitable for lasing/amplifying in the near-IR spectral range.

The Monte-Carlo procedure and a new method to determine the chirality of water environments and their classification were used for the first time to study the chiral properties of small water clusters such as (H 2 O) n , K + (H 2 O) m , and Na + (H 2 O) m ( n = 4–8, m = 5–10) at a temperature of 1 K. The probability that the studied water clusters will be chiral becomes higher at an increase in their size. It is revealed that a small water cluster devoid of impurities is not dominated by one of the arrangements (right or left). The addition of K + or Na + impurity ions does not change the equilibrium distribution of right and left configurations in the 10 000-sample set.

A new numerical method to determine the chirality of water configurations is developed. It consists in the comparison of matrices composed for both initial configuration and its mirror image based on the information of four bound water molecules. The method developed enables the rapid and unambiguous determination of the chirality of an aqueous system.

Изучено влияние ионов Al и Се на оптическое поглощение и люминесценцию монокристаллических пленок (Pb,Gd)3 - уСеуAlхGa5 - хO12, где х = 2.02, 2.09, 2.13, 2.17, 2.22 и у = 0.02, 0.06, 0.07, выращенных методом жидкофазной эпитаксии из переохлажденных растворов-расплавов на основе системы PbO B2O3 на монокристаллических подложках Gd3Ga5O12 с ориентацией (111) при концентрациях оксида алюминия 2.0, 2.1 и 2.2 мол. % и оксида церия 0.03 и 0.2 мол. % в шихте. Определен сдвиг полос поглощения уровней 5d1 и 5d2 ионов Ce3+ в зависимости от концентрации Al в пленках. Показано, что интенсивность полос люминесценции иона Се3+ увеличивается с ростом содержания Al и Се в пленках.

In this paper, a method for distinguishing between liquid samples that are sensitive to the influence of low-intensity physicochemical factors is described. It is based on the calculation of the initial moments of the intensity distribution series in their infrared spectra and comparison of the obtained values with each other. Reliable signs of the coincidence of liquid samples that were obtained in the experiment were used to distinguish distilled water at–0.5 ± 0.5 and–3.0 ± 0.5±C, and at–3.0 ± 0.5 and–5.0 ± 0.5°C, and to distinguish between distilled and tap water at 25.0 ± 0.5°C. For each sample, the moments were calculated for the bending (1640 cm–1), combination (2090 cm–1), and stretching (3370 cm–1) water absorption bands. It was found that when comparing distilled water at–0.5 ± 0.5 and–3.0 ± 0.5°C the greatest differences are observed for the bending band (50%). When considering distilled water at–3.0 ± 0.5 and–5.0 ± 0.5°C, the greatest differences occur for the stretching band (54%). When comparing distilled water at 25.0 ± 0.5°C and tap water at 25.0 ± 0.5°C, the greatest differences were observed for the bending band (86%).

We have studied the effect of Al and Ce ions on the optical absorption and luminescence of singlecrystal (Pb,Gd)3–y Ce y Al x Ga5–x O12 (x = 2.02, 2.09, 2.13, 2.17, 2.22; y = 0.02, 0.06, 0.07) films grown on (111)-oriented single-crystal Gd3Ga5O12 substrates by liquid-phase epitaxy from supercooled high-temperature solutions using solvents of the PbO–B2O3 system and growth charges containing 2.0, 2.1, or 2.2 mol % aluminum oxide and 0.03 or 0.2 mol % cerium oxide. The shift of the absorption bands of the Ce3+ 5d 1 and 5d 2 levels has been determined as a function of Al concentration in the films. The intensity of the Ce3+ luminescence bands of the films has been shown to increase with increasing Al and Ce concentrations.

The paper dwells on the study of chirality of aqueous systems containing extrinsic chiral biological molecules of L-, D-valine and L-, D-glycerose and water clusters (H2O)4. Aqueous were obtained using the Avogadro software with the Conjugate Gradients algorithm. Using the Solvate software, molecules of L-, D-glycerose and L-, D-valine and water clusters (H2O)4 have been surrounded with the layer of H2O molecules of given thickness. The thickness varied from 4 Å to 14 Å with a step of 2 Å. The research indicated that for the aqueous system containing L-glycerose with 8Å thick aqueous layer the number of right-handed aqueous shells in the sample is greater than that of left-handed those. At that, for the system containing D-valine with 4Å thick aqueous layer the number of left-handed aqueous shells in the sample is greater than that of right-handed those.