Near Earth space sporadic radio emission busts occurring during sunrise

During the period of low solar activity at sunrise the effect of sporadic high frequency near Earth space radio emission was experimentally discovered at middle latitudes. The possible mechanism of its origin is discussed

Chaotic Observer-based Synchronization Under Information Constraints

Limit possibilities of observer-based synchronization systems under information constraints (limited information capacity of the coupling channel) are evaluated. We give theoretical analysis for multi-dimensional drive-response systems represented in the Lurie form (linear part plus nonlinearity depending only on measurable outputs). It is shown that the upper bound of the limit synchronization error (LSE) is proportional to the upper bound of the transmission error. As a consequence, the upper and lower bounds of LSE are proportional to the maximum rate of the coupling signal and inversely proportional to the information transmission rate (channel capacity). Optimality of the binary coding for coders with one-step memory is established. The results are applied to synchronization of two chaotic Chua systems coupled via a channel with limited capacity.Comment: 7 pages, 6 figures, 27 reference

Development of the Adolescents’ Communicative Culture in the Context of Digitalization of Additional Education

In the era of digitalization of education and economy and the development of artificial intelligence, adolescents appear highly competitive compared with other generations in understanding digital technologies, acquiring expertise, and mastering modern means of communication, which normally causes intergenerational conflicts and the loss of an adult’s personal and functional authority. The aim of this research was to develop and test a model for developing adolescents’ communicative cultures in an institution of additional education. The research emphasizes the significance of personality-oriented, interactive-communicative, and cultural approaches and conducts a comparative analysis of the sources. Methodologically, the study relies on a quantitative method with primary sources. Besides, the findings of the study contribute to the existing limited stress on the importance of adolescents’ communicative cultures from the perspective of the digitalization of additional education. The study finds that the use of digital options in education has reduced social interaction among students. However, the students prefer to use digital methods of learning as they find them more convenient for communication. Therefore, the digital communication culture has high potential in the educational sector. The findings are novel as this study is one of the few recent studies that examined how communicative culture has transformed due to digital means in education. Doi: 10.28991/ESJ-2022-SIED-019 Full Text: PD

Empirical Evaluation of Educational Service Quality in the Current Higher Education System

During the transition to the mixed education model during the Covid-19 pandemic, some issues have emerged in the matter of providing and supporting the quality of university education in all countries, including educational programs' relevance to the demands of the labor market, expectations of students and their families, digital transformation of the educational process, and economic stability of institution networks. The purpose of the research was to evaluate the quality of educational services in the higher education systems of Indonesia and Russia. The study systematized several essential factors for achieving educational service quality in the current higher education systems, given the limitations imposed by Covid-19. Following this objective, the study utilized a quantitative approach, adopting the SERVQUALmodel that measures the service quality across five service dimensions: tangibility, reliability, responsiveness, assurance, and empathy. The model aided the development of the questionnaire to assess the quality of the educational services of Indonesian and Russian universities. The questionnaire included 25 close-ended questions on two scales: one to measure the students' expectations regarding the quality of educational services and the other to measure the students' current perceptions. A snowball technique was used to recruit students from Indonesian and Russian universities as participants in the study. The students were asked to assess the educational services of their universities based on their initial expectations and current perceptions. Overall, the students of both countries revealed that they had high expectations from the educational services of their universities. However, the current perceptions of the Russian students regarding the quality of educational services provided by their universities are higher and more positive than the perceptions of the Indonesian students regarding the quality of educational services being delivered to them. The findings of the study have implications for education practitioners. Doi: 10.28991/ESJ-2022-SIED-05 Full Text: PD

The use of nonsteroidal anti-inflammatory drugs for the treatment of facial pain in practice

Studies have shown that the drug ibuprofen is effective for the relief of pain in the facial area, allowing the continuation of dental treatment. Clinical experience has shown that 87% of patients were satisfied with the result of pain relief.Проведенные исследования показали, что препарат ибупрофен является эффектив-ными для купирования болевого синдрома в лицевой области, что позволяет дальнейшее проведение стоматологического лечения. Клинический опыт показал, что 87% пациентов были удовлетворены результатом снятия болевого синдрома

Features of heart remodeling in patients with chronic obstructive pulmonary disease in combination with chronic heart failure

Goal. Clinical, structural and functional features of right and left heart remodeling in patients with chronic obstructive pulmonary disease (COPD) were studied. Materials and methods. We examined 32 patients with COPD without exacerbation. Patients were divided into 2 groups: 1 - patients with COPD in combination with chronic heart failure (CHF); 2 - patients with COPD without CHF. 19 patients showed signs of CHF. Echocardiography (EchoCG) with additional parameters, spirometry, radiography, pulse oximetry was performed. The study also assessed level of highly sensitive C-reactive protein, acid-base blood composition, brain natriuretic peptide (NTproBNP). Results. In patients with combined pathology, there was a decrease in exercise tolerance, a greater body mass index and intensity of dyspnea. The left ventricular ejection fraction over 50% observed in the majority of patients (30) in both groups, therefore the signs of heart failure are explained precisely by diastolic dysfunction of the right and left ventricles. The conclusion. The use of tissue Doppler studies allows more accurate determination of the diastolic function of the right and left ventricles. Remodeling of the right and left ventricles are interdependent processes. The study of NTproBNP and additional EchoCG parameters - allow to reveal diastolic dysfunction of both ventricles of the heart at early stages.Цель. Исследовать клинические, структурно-функциональные особенности ремоделирования правых и левых отделов сердца у больных хронической обструктивной болезнью легких (ХОБЛ) в сочетании с хронической сердечной недостаточностью (ХСН). Материалы и методы. Обследовано 32 больных ХОБЛ вне обострения. Пациенты были распределены на 2 группы: 1 - пациенты с ХОБЛ в сочетании с ХСН (19); 2 - пациенты с ХОБЛ без ХСН (13). Проводили эхокардиографию, спирометрию, рентгенографию, пульсоксиметрию. Оценивали уровень высокочувствительного С-реактивного белка, кислотно-щелочного состава крови, мозгового натрийуретического пептида (NTproBNP). Результаты. У больных с сочетанной патологией отмечались снижение толерантности к физической нагрузке, больший индекс массы тела и интенсивность одышки. Сохраненная фракция выброса левого желудочка более 50% была отмечена у большинства больных (30) в обеих группах, поэтому признаки сердечной недостаточности объясняется именно диастолической дисфункцией правого и левого желудочков. Заключение. Использование тканевого допплеровского исследования позволяет более точно определить диастолическую функцию правого и левого желудочков. Ремоделирование правого и левого желудочков являются взаимозависимыми процессами. Исследование NTproBNP и дополнительных ЭхоКГ-параметров позволяют выявить диастолическую дисфункцию правого и левого желудочков сердца на ранних стадиях

SARMENTI: Smart multisensor embedded and secure system for soil nutrient and gaseous emission monitoring

Demand for sustainably produced food is driving current strategies for intensification of the agricultural sector worldwide. To meet these challenges farmers will need to adopt a whole-farm approach to resource efficiency. They will increase their productivity with a better application of knowledge per hectare. Optimising soil fertility will enable farmers to maximise their productivity and profitability with higher grass and crop yield and quality

Nickel-Catalyzed Carbon–Carbon Bond-Forming Reactions of Unactivated Tertiary Alkyl Halides: Suzuki Arylations

The first Suzuki cross-couplings of unactivated tertiary alkyl electrophiles are described. The method employs a readily accessible catalyst (NiBr[subscript 2]·diglyme/4,4′-di-tert-butyl-2,2′-bipyridine, both commercially available) and represents the initial example of the use of a group 10 catalyst to cross-couple unactivated tertiary electrophiles to form C–C bonds. This approach to the synthesis of all-carbon quaternary carbon centers does not suffer from isomerization of the alkyl group, in contrast with the umpolung strategy for this bond construction (cross-coupling of a tertiary alkylmetal with an aryl electrophile). Preliminary mechanistic studies are consistent with the generation of a radical intermediate along the reaction pathway.National Institute of General Medical Sciences (U.S.) (R01-GM62871)Merck Research Laboratories (Summer Fellowship

Modern microwave methods in solid state inorganic materials chemistry: from fundamentals to manufacturing

No abstract available