Methods of Confirming the Exclusive Rights of Digital Photo and Similar Graphic Documents

Today, media content is both a way of making money and a part of the art. To protect copyright from the fraud of digital media content, it is necessary to apply various methods of digital signing and marking. Such methods can be borrowed from cryptography and steganography

Dynamics of platicons due to third-order dispersion

Dynamics of platicons caused by the third-order dispersion is studied. It is shown that under the influence of the third-order dispersion platicons obtain angular velocity depending both on dispersion and on detuning value. A method of tuning of platicon associated optical frequency comb repetition rate is proposed.Comment: 11 pages, 5 figure

Review of the Association for Researching and Applying Metaphor (RaAM) 2020 Conference

В статье представлены материалы международной конференции ассоциации исследователей метафоры RaAM, прошедшей в Хамаре 18-21 июня 2020 г.The annual international conference of RaAM (Association for Researching and Applying Metaphor) took place in Hamar, Norway, from 18 to 21 June 2020. The article provides a brief overview of the main conference papers

Especially the training and socialization of individuals with cerebral palsy and its consequences in the field of higher education

Статья посвящена вопросам организации условий реализации образовательных потребностей и процесса социализации обучающихся с детским церебральным параличом в условиях системы высшего образования.The article is devoted to the organization of conditions for the realization of educational needs and the process of socialization of students with infantile cerebral palsy in the context of higher education

Clinical efficacy of coronary angioplasty of chronic occlusion in patients with previous Q-myocardial infarction

Objective: to evaluate the clinical effects of delayed reperfusion of chronically occluded IRA in patients after Q-myocardial infarction (Q-MI), in relation to the general and local contractility of left ventricular ejection fraction (LVEF). Material and Methods. The study included 200 patients with previous Q-MI. PCI for chronic occlusion of the IRA was performed in an average period of 1-2 months after the documented Q-MI. Complete clinical and instrumental examination of patients was performed before the PCI and after 12 months. Symptoms of angina, left ventricular ejection fraction, prevalence areas of hypo-and akinesia infarction and functional class of chronic heart failure have been evaluated. Results. Statistically significant reduction in the number of patients with symptoms of angina: 41 (20.5%) versus baseline 94 (47%), p <0,0001; significant improvement in myocardial contractile function —the number of patients with LV EF <4076% reduction (38%) to 32 (16%), p <0.0001 have been revealed. An increase in the frequency of functional classes of heart failure has not reached the statistical significance. According to the ultrasound investigation of hypo-and akinesia areas of infarction there was a statistically significant increase in the incidence of myocardial hypokinesis prevalence of 152 (76%) versus baseline 103 (51.5%), p <0.0001. Conclusions. The late recanalization of chronic occlusion (after 8 weeks post-MI) with the restoration of optimum antegrade blood flow improves left ventricular function and long-term prognosis reducing the risk of cardiovascular disorders during the period of the 12-month follow-up

Platicon Stability in Hot Cavities

The stability of platicons in hot cavities with normal group velocity at the interplay of Kerr and thermal nonlinearities was addressed numerically. The stability analysis was performed for different ranges of pump amplitude, thermal nonlinearity coefficient and thermal relaxation time. It was revealed that for the positive thermal effect, the high-energy wide platicons are stable, while the negative thermal coefficient provides the stability of narrow platicons.Comment: 4 pages, 8 figure

Ultra high-Q WGM microspheres from ZBLAN for the mid-IR band

The advantages of high-quality-factor whispering gallery mode microresonators can be applied to develop novel photonic devices for the mid-IR range. ZBLAN (glass based on heavy metal fluorides) is one of the most promising materials to be used for this purpose due to low optical losses in the mid-IR. We developed original fabrication method based on melting of commercially available ZBLAN-based optical fiber to produce high-Q ZBLAN microspheres with the diameters of 250 to 350 $\mu$m. We effectively excited whispering gallery modes in these microspheres and demonstrated high quality factor both at 1.55 $\mu$m and 2.64 $\mu$m. Intrinsic quality factor at telecom wavelength was shown $(5.4\pm0.4)\cdot10^8$ which is defined by the material losses in ZBLAN. In the mid-IR at 2.64 $\mu$m we demonstrated record quality factor in ZBLAN exceeding $10^8$ which is comparable to the highest values of the Q-factor among all materials in the mid-IR