Analysis of color properties of raster images of histological microspecimens: own research experience

Analysis of color properties of raster images of histological microspecimens: own research experience. Ivanova M.D., Myroshnychenko M.S., Khara G.I., Arseniev O.V., Olkhovsky V.O., Grygorian E.K., Fedulenkova Yu.Ya., Kozlov S.V. This study is aimed to develop a computer program to analyze the color properties of raster images of histological microspecimens used in pathological anatomy and forensic medicine. When developing a computer program, we used the system for building client applications – Windows Presentation Foundation (WPF). The system allows you to create applications with visually attractive user interaction capabilities. The programming language is C#, as well as basic graphics capabilities of the .NET Framework system are used. To speed up the display we applied double buffering. In the course of the research, the authors developed a modern computer program «Analysis of color properties of raster images». This program allows you to analyze the color of each individual pixel of a photograph in RGB and Lab color models, comparing the colors and brightness of individual pixels, selecting groups of points and determining statistical characteristics of them. Characteristic points are well distinguishable in the photographs, studied with the program «Analysis of color properties of raster images». This makes it possible to select and automate these properties, using computer recognition algorithms, completely removing human factor’s influence on the analysis results. The computer program «Analysis of color properties of raster images» is of significant scientific and practical interest for specialists both in the field of morphology (pathologists, forensic experts, etc.), and in the field of other biomedical disciplines

Group Analysis of Variable Coefficient Diffusion-Convection Equations. I. Enhanced Group Classification

We discuss the classical statement of group classification problem and some its extensions in the general case. After that, we carry out the complete extended group classification for a class of (1+1)-dimensional nonlinear diffusion--convection equations with coefficients depending on the space variable. At first, we construct the usual equivalence group and the extended one including transformations which are nonlocal with respect to arbitrary elements. The extended equivalence group has interesting structure since it contains a non-trivial subgroup of non-local gauge equivalence transformations. The complete group classification of the class under consideration is carried out with respect to the extended equivalence group and with respect to the set of all point transformations. Usage of extended equivalence and correct choice of gauges of arbitrary elements play the major role for simple and clear formulation of the final results. The set of admissible transformations of this class is preliminary investigated.Comment: 25 page

The Effect of the Pandemic on Heart Rate Variability in Senior Adults

Иванова Вероника Дмитриевна, бакалавр кафедры теории физической культуры института физической культуры, спорта и молодежной политики, Уральский федеральный университет имени первого Президента России Б.Н. Ельцина. 620002, г. Екатеринбург, ул. Мира, 19. E-mail: [email protected], ORCID: 0000-0002-8824-3183. Семёнова Галина Ивановна, кандидат педагогических наук, доцент, доцент кафедры теории физической культуры института физической культуры, спорта и молодежной политики, Уральский федеральный университет имени первого Президента России Б.Н. Ельцина. 620002, г. Екатеринбург, ул. Мира, 19. E-mail: [email protected], ORCID: 0000-0003-0193-1416. V.D. Ivanova, [email protected], ORCID: 0000-0002-8824-3183, G.I. Semenova, [email protected], ORCID: 0000-0003-0193-1416 Ural Federal University named after the first President of Russia B.N. Yeltsin, Ekaterinburg, Russian FederationЦель исследования: изучение влияния первой волны пандемии на вариабельность сердечного ритма у женщин пожилого возраста. Материалы и методы. Исследование проводилось на базе Уральского федерального университета на группе женщин пожилого возраста, которые до начала пандемии занимались в группе здоровья. Основу исследования составил анализ вариабельности сердечного ритма с помощью прибора Варикард 3.0. Анализировалось более 30 показателей функционального состояния, таких как стресс-индекс, активность сосудистого ритма, вегетативный баланс, наличие аритмий и другие. Результаты. В результате тестирования мы выявили, что показатели веса увеличились в среднем на 13 %, общее функциональное состояние ухудшилось или осталось прежним, стабильность сердечного ритма стала повышенной или выражено повышенной, активность симпатического сосудистого русла стала умеренно повышенной или нормальной, вегетативный гомеостаз остался в норме, в то время как степень централизации управления у всех обследуемых повысилась и стала иметь выраженное повышение активности центральных уровней регуляции. Стресс-индекс увеличился на 30–400 единиц, что можно обосновать ограничительными мерами для лиц пожилого возраста. Заключение. Проведенное исследование показало, что режим самоизоляции оказал отрицательное влияние на организм женщин пожилого возраста. Многие показатели указывают на снижение функциональных резервов организма, а также на активную реакцию организма на стрессовые факторы. Aim. The article aims to study the impact of the first wave of the pandemic on heart rate variability in elderly women. Materials and methods. The study was conducted on the premises of the Ural Federal University. A group of elderly women who followed the health enhancement program before the outbreak of the pandemic participated in the study. The study included the analysis of heart rate variability by means of the VARICARD 3.0 device. More than 30 indicators of the functional status were analyzed such as stress index, vascular rhythm activity, vegetative balance, the presence of arrhythmias, and others. Results. As a result of testing, weight indicators increased by an average of 13%. The functional status worsened or remained the same, heart rate stability increased or significantly increased, vascular bed activity became moderately increased or normal, vegetative homeostasis remained normal, while the degree of centralization in all subjects increased and was characterized by a pronounced increase in the central levels of regulation. The stress index increased by 30–400 units, which can be explained by restrictive measures for the elderly. Conclusion. The study demonstrated that self-isolation had a negative impact on elderly women. Many indicators show a decrease in functional reserves, as well as an active reaction of the body to stress factors

Outcomes of accelerated corneal collagen cross-linking in keratoconus

Keratoconus (KC) is a degenerative noninflammatory disease of the cornea which is characterized be structural changes in the cornea which leads to progressive thinning and bulging in the central and/or peripheral part of the cornea and is accompanied by irregular astigmatism and significant vision impairment. Today, keratoconus treatment is focused on a stage of disease development. At progressive KC stages (II-III), corneal collagen cross-linking is performed. At the present, a latest-generation unit (UV-X™2000, Avedro) is used to perform accelerated cross-linking, which allows for a threefold decrease of the procedure duration (to 10 minutes) compared to the standard protocol Material and Methods. Corneal collagen cross-linking was performed in 71 patients (100 eyes). Results. Accelerated corneal collagen cross-linking for keratoconus stages II-III made it possible to stabilize the pathological process in 100% of cases, based on 12 month follow-up. Keratoconus stabilization was accompanied by: a decrease of astigmatism by 1.4 D and of the corneal refractive power by 3.2D; an increase of the corneal thickness by 8.8 nm; an increase of UCVA and BCVA in 96.5% and 89.6% of cases, respectively; and recovery of normal corneal architectonics according to confocal biomicroscopy data. Subjectively, 64 patients (90%) noted the improvement in the vision quality and better tolerance to spectacles correction

Color symbolism in the cultures of the North American Indians

The study analyzes the color symbolism in the cultures of the North American Indians. Different tribes preferred the same colors as universal, and this palette includes only six basic colors (white, black, red, yellow, blue and green). The research methods are statistical, semantic and cultural analysis of the use of certain colors in the life of the American Indians, as well as scientific studies of color symbolism, color names and color perception, the frequency of use of colors in clothing and household items of Indians of different tribes. The study allows the authors to conclude that the color in the culture of the Indians has a deeply sacred sense, and despite the universality of the colors for the majority of North American Indians, for different tribes, these colors carry a different meaning, which is still true for modern society. Indians play a primary role in marking the cardinal directions, which is the basis for all subsequent ritual use of these colors. However, despite the same set of colors (white, black, red, yellow, blue and green), there is difference between associations and values which these colors has in various tribes' cultures. The fact is that color perception is largely due to developed beliefs and traditions. The study hypothesizes that the colors' symbolism and sacred sense are mostly caused by culture: as a rule, the choice of color is determined not so much by universal mechanisms of color perception as by local cultural traditions, which included a system of color symbolism of the North American Indians. © 2020, Institute of Advanced Scientific Research, Inc. All rights reserved

Examination of the surface of carbon fibres after oxidation by ozone

Translated from Russian (Poverkhn. Fiz. Khim. Mekh. 1986 (3) p. 96-98)SIGLEAvailable from British Library Document Supply Centre- DSC:9022.048(BG-Trans--8498)T / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Clinico-paraclinical and epidemiologic peculiarities of "chemical intoxicating alopecia" (CIA) in children at the incipient stage of the disease

Для гострого перебігу "хімічної інтоксикаційної алопеції" є характерним поєднання таких клінічних ознак: катаральне запалення дихальних шляхів, гіперреактивність центральної нервової системи та дифузна алопеція як завершальний симптом. У половини постраждалих дітей знайдено зміни у морфології волосся, що можуть свідчити про отруєння солями талію. Однак результати проведених у різний час та різних установах токсикологічних досліджень не змогли чітко підтвердити "талієву теорію". Виникнення "хімічної інтоксикаційної алопеції" в 1988р. мало характер спалаху без доведених епідеміологічних взаємозв'язків. Це свідчило на користь скоріше разового впливу невстановленого фактора або групи факторів на групу чернівецьких дітей. За наявної специфічної клінічної картини гострого періоду "хімічної інтоксикаційної алопеції" результати проведених додаткових обстежень дітей були в цей період малоспецифічними і свідчили про напругу захисних систем їх організму.The acute course of "chemical intoxicating alopecia" is characterized by the combination of such clinical signs: catarrhal inflammation of the respiratory tract, hyperreactivity of the central nervous system and diffuse alopecia, the latter being the concluding symptom. Changes in the hair morphology were found in half of the children which might be due to thallium salts intoxication. However, the results of toxicologic studies carried out at various periods of time and different institutions didn't make it possible to confirm the "thallium theory". The appearance of "chemical intoxicating alopecia" in 1988 had the character of an outbreak without established epidemiologic correlation. It testified in favour of a single-acting influence of an unestablished factor or a group of factors on a group of Chernivtsi children. Due to the presence of an obvious clinical picture of the acute period of "chemical intoxication alopecia", the results of conducted additional examinations of children at this stage of time were poorly specific and were indicative of tension of the defense systems of the organism of affected children