The peculiarities of anion vacancy distribution and the relationship between their concentration and the Tld-500 detector Tl output

A procedure has been developed for estimating the uniformity of anion vacancy distribution in TLD-500 detectors on the basis of anion-deficient corundum single crystals. Vacancy distribution topograms were constructed for TLD-500 detectors with different sensitivities to irradiation. Analysis of the topograms provided correlations between average anion vacancy concentrations and thermoluminescent (TL) yields in the main peak with a maximum at 450 K. To confirm the pattern of regularities, the effects of high-temperature annealing of TLD-500 samples in air at T = 1700 K were studied depending on its duration. Increasing the annealing time from 40 to 105 minutes was found to correlatedly reduce the anion vacancy concentrations and TL-yields in the basic and high-temperature peaks at 450 and 830 K, respectively. © Published under licence by IOP Publishing Ltd.The work was partly supported by the Russian Foundation for Basic Research (Grant No. 18-08-00093-a) and UB RAS (pr. 18-11-2-2)

Optically stimulated luminescence in strongly irradiated anion-deficient corundum and associated phototransfer effects

Optically stimulated luminescence (OSL), its mechanisms and the role of phototransfer effects in it have been comprehensively studied for strongly irradiated anion-deficient corundum with a high-temperature thermoluminescence (TL) peak at 830 K and without it. The fast component of the OSL kinetics in the samples was found to be due to the emptying of the main trap. The slow component was observed only in samples with the 830 K TL peak and was caused by the depletion of deep traps responsible for TL peaks in the range of 500 K<T<740 K. © Published under licence by IOP Publishing Ltd

Programming Tools for Messenger-Based Chatbot System Organization: Implication for Outpatient and Translational Medicines

© 2016, Springer Science+Business Media New York.The implementation of translational medicine is associated with considerable costs of equipment, staff competence, and doctor-patient (DP) and clinic-patient (CP) communication. The application of DP and CP systems evolved from e-mail letters to website assistance chat and smartphone apps in the context of the m-health paradigm. The rapid development of mobile messengers and chatbot systems has opened a new niche for DP and CP communication, providing a high population penetration rate with perfect capabilities for personalization. This article provides a model of chatbot system organization as well as programming tools for its implementation. The integration of machine conversation systems supplemented by natural spoken language together with m-health devices and mobile apps is a good solution for a variety of tasks in translational and outpatient medicine. The usage of chatbot systems as a communication device for the purposes of translational medicine is going to reduce costs and time on routine operations

HIGH-TEMPERATURE THERMOLUMINESCENCE OF ANIONDEFECTIVE CORUNDUM AND ITS APPLICATION FOR HIGH-DOSE DOSIMETRY

Results of the investigation of the thermoluminescence features of the anion-defective single crystals of a-Al20 3 (TLD-500) irradiated by pulsed X-ray and electron beams with nanosecond pulse duration in the 1 — 104 kGy dose range are presented

KINETIC ANALYSIS OF THERMOLUMINESCENT GLOW CURVES IN ANION-DEFECTIVE CRYSTALS α-Al2O3 FROM -40 TO 300 °C

The kinetic parameters of shallow traps were investigated. The influence of the irradiation temperature on the intensity of the main dosimetric peak was investigated. The studies were carried out in the temperature range from -40 to 300 ° С.Авторы выражают благодарность профессору И.И. Мильману за предоставленную помощь. Работа выполнена в рамках государственного задания МИНОБРНАУКИ России (тема «Экспертиза», № АААА-А19-119062590007-2) при частичной поддержке РФФИ (проект № 20-48-660045)

Luminescent Properties of Thin Sensitive Layers Created in Corundum by IR Laser Treatment

The spectra of X-ray luminescence, photoluminescence, optically and thermally stimulated luminescence in thin active layers created by laser treatment on the surface of corundum crystals have been investigated. The association between luminescence activity and anion deficiency has been established.Работа выполнена в рамках государственного задания МИНОБРНАУКИ России (тема «Диагностика», № 122021000030-1) при частичной поддержке РФФИ (проект № 20-48-660045)

LUMINESCENT PROPERTIES OF POWDERS OF ANION-DEFECTIVE CORUNDUM

The dependences of the response of thermo- and optically stimulated luminescence (TL and OSL) on the particle size of the anion-defective corundum powder were studied. The dependences of the OSL and TL responses on the ratio of the particle size and the thickness of the sensitive layer were obtained.Работа выполнена в рамках государственного задания МИНОБРНАУКИ России (тема «Диагностика», № 122021000030-1)

Synthesis, optical and electrochemical properties of new thieno[2,3-b]indole-based dyes

Three new push-pull dyes consisting of a thieno[2,3-b]indole ring system as an electron donor, thiophene spacer as a π-bridge, and electron-withdrawing moieties such as 2-methylene malonitrile, 2-methylene-1Hindene- 1,3(2H)-dione, and 2-(2-methylene-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile, have been synthesized and studied for their application in organic electronics devices. Investigation of their optical and electrochemical properties reveal that these compounds possess narrow band gaps (1.7-2 eV) and an effective absorption in the visible spectral range (440-740 nm). Therefore, these chromophores can be regarded as promising light-harvesting materials. © 2018 ARKAT USA, Inc.Russian Science Foundation, RSF: 16-13-10435This research study was financially supported by the Russian Science Foundation (Project No. 16-13-10435)