ПРОГРАМНЕ ЗАБЕЗПЕЧЕННЯ ВІДНОВЛЕННЯ РОЗПОДІЛІВ ЗА МАЛИМИ ВИБІРКАМИ

The program «SmallSample» for distributions restoration using small samples is developed.The distributions nonparametric restoration methods for small samples are compared.Разработано программное обеспечение «SmallSample» восстановления распределений по малым выборкам. Проведено сравнение работы непараметрических методов восстановления распределений по малым выборкам.Розроблено програмне забезпечення «SmallSample» відновлення розподілів за малими вибірками. Проведено порівняння роботи непараметричних методів відновлення розподілів за малими вибірками

EVALUATION OF THE DOSIMETRIC PARAMETERS FOR 252CF DURING INTERSTITIAL BRACHYTHERAPY OF HEAD AND NECK ORGANS

Dosimetric calculations of the main parameters of interstitial brachytherapy of the head and neck organs with the 252Cf source were performed. 10 cases of low-power brachytherapy were analyzed. The concept of precision modeling of the interstitial brachytherapy scenario is formulated

Probing a Complex of Cytochromecand Cardiolipin by Magnetic Circular Dichroism Spectroscopy: Implications for the Initial Events in Apoptosis

Oxidation of cardiolipin (CL) by its complex with cytochrome c (cyt c) plays a crucial role in triggering apoptosis. Through a combination of magnetic circular dichroism spectroscopy and potentiometric titrations, we show that both the ferric and ferrous forms of the heme group of a CL:cyt c complex exist as multiple conformers at a physiologically relevant pH of 7.4. For the ferric state, these conformers are His/Lys- and His/OH–-ligated. The ferrous state is predominantly high-spin and, most likely, His/–. Interconversion of the ferric and ferrous conformers is described by a single midpoint potential of -80 ± 9 mV vs SHE. These results suggest that CL oxidation in mitochondria could occur by the reaction of molecular oxygen with the ferrous CL:cyt c complex in addition to the well-described reaction of peroxides with the ferric form

Thin films of unsubstituted and fluorinated palladium phthalocyanines: structure and sensor response toward ammonia and hydrogen

In the present work, we study and compare the structure and sensing properties of thin films of unsubstituted palladium phthalocyanine (PdPc) and hexadecafluorosubstituted palladium phthalocyanine (PdPcF16). Thin films of PdPc and PdPcF16 were obtained by the method of organic molecular beam deposition and their structure was studied using UV-visible spectroscopy, X-ray diffraction and atomic force microscopy techniques. The electrical sensor response of PdPc films toward ammonia and hydrogen was investigated and compared with that of PdPcF16 films. The nature of interaction between the phthalocyanines films and some gaseous analyte molecules has been clarified using Quantum chemical (DFT) calculations

Effects of annealing on device parameters of organic field effect transistors using liquid-crystalline tetrasubstituted zinc phthalocyanine

The device performance of organic thin-film transistors (OTFTs) employing the solution processed films of room temperature liquid-crystalline tetrasubstituted zinc phthalocyanine derivative was found to depend upon the film morphology. Atomic force microscopic and X-Ray diffraction studies show that the annealing at 70° produced a preferentially unidirectional void-free film with improved surface smoothness. The OTFTs with the annealed films exhibited enhanced conductivity, threefold reduction in threshold voltage, a nearly one order of magnitude increase in the on/off ratio and more than one-third reduction of hysteresis in the transfer characteristics.This work is sponsored by the Air Force Office of Scientific Research, Air Force Material Command, USAF, under grant No. FA8655-13-1-3018. TB acknowledges the financial support from the Ministry of Education and Science of the Russian Federation

Use of a neural network in creating a digital assistant for blind and visually impaired people

The experience of ongoing research in image processing clearly demonstrates the huge scope for the development of new neural networks that can help people in a wide range of tasks. The authors chose the direction of work related to helping people who have vision problems. The article considers a convolutional neural network of the Mask R-CNN model for segmenting objects in an image. During the research the authors study a large number of algorithms that can quickly and accurately process images, such as Faster R-CNN, which was the most efficient in 2020. During the analysis, it was revealed that the use of Mask R-N technology can significantly increase the efficiency of performing tasks, since this algorithm is the latest version of the machine learning model. As a result of the study, a neural network was developed that is capable of identifying and distinguishing a large number of objects in an image. The next step is to refine the algorithm and use additional means of interaction with the hardware of the systems to increase the speed of the neural network. In the future, the resulting neural network will be integrated into the Digital Assistant for the Blind and Visually Impaired Persons application. This application is guaranteed to improve the daily life of people with disabilities who experience certain inconveniences due to their features, and can become the basis for other, larger projects related, for example, to unmanned devices, as well as services whose work is directly based on image processing

Assessment of physical activity of students and adolescents

This is article presents an assessment of physical activity in schoolchildren of grades 5, 9 and 1st year students. The study showed that the level of physical activity decreases with age. For example, the frequency of walking every day decreased from 63.3% (5th and 9th grade) to 28.7% (students). Among the surveyed students, the share of those engaged in sports sections decreased from 90% (5th grade) and 77.8% (9th grade) to 25%. In comparison with school students, the frequency and duration of physical activity decreases. The results obtained indicate the need to expand the number of sports sections in higher educational institutions, the availability of sports facilities, as well as the rational distribution of free time from studyВ данной статье представлена оценка физической активности у школьников 5, 9 классов и студентов 1 курса. Исследование показало, что уровень физической активности с возрастом снижается. Например, частота прогулок каждый день уменьшилась с 63,3% (5 и 9 класс) до 28,7% (студенты). Среди опрошенных студентов снизилась доля занимающихся в спортивных секциях с 90% (5 класс) и 77,8% (9 класс) до 25%. У студентов по сравнению со школьниками уменьшается кратность и продолжительность занятий физическими нагрузками. Полученные результаты свидетельствуют о необходимости расширения числа спортивных секций в высших учебных заведениях, доступности спортивных объектов, а также рационального распределения свободного времени от учеб

Comparative assessment of posture among 1st and 3rd year students of the medical and preventive faculty of the Ural state medical university

The purpose of the study is to identify and compare the features and patterns of posture disorders in students of the 1st and 3rd courses of the medical and preventive faculty of USMU.Цель исследования - выявить и сравнить особенности и закономерности нарушений осанки у студентов 1 и 3 курсов медико-профилактического факультета УГМУ

DYNAMICS MODEL OF THE CONTENT 131-I IN THE THYROID AND DAILY MILK YIELD IN DAIRY COWS

The model of radioiodine metabolism in the body of dairy cows, taking into account the content of stable iodine in the diet of animals, makes it possible to evaluate the effectiveness of the use of iodine preparations in order to reduce the accumulation of isotopes in the thyroid gland and milk

Study of the psychophysiological state of students of the medical and preventive faculty of USMU on distance learning

The aim of the study – to assess the psychophysiological state of students of the Faculty of Medicine and Prevention who were on distance learning in connection with the pandemic.Цель исследования – оценить психофизиологическое состояние студентов медико-профилактического факультета, находившихся на дистанционной форме обучения в связи с пандемией