Electroencephalogram in premature infants: From normal to pathological activity

This study was aimed to assess electrophysiological brain activity in newborns of various gestational ages using electroencephalography (EEG). We summarized the data on the main EEG characteristics of premature infants and their dynamics and described the most common pathological EEG changes that can be identified at this age. We also discussed prognostic value of various neonatal EEG patterns (including their proportion and location), which allow verification of functional brain disorders at early stages. © 2019 ABV-Press Publishing House. All rights reserved.Russian Science Foundation, RSFФинансирование. Работа выполнена при финансовой поддержке гранта №16-18-10371 Российского научного фонда. Исследование прово-дится в рамках программы, поддержанной постановлением №211 Правительства Российской Федерации, соглашение №02.A03.21.0006. Financing. The study was funded by the grant No. 16-18-10 371 from the Russian Science Foundation. The study conducts within a program, supported by the resolution of the Russian Government No. 211, agreement No. 02.A03.21.0006

Mathematical model of diagnostics of perinatal damage of the central nervous system in infants in the neonatal period

Questions of relevance and timeliness of diagnostics of perinatal disturbances of the central nervous system in newborns are considered in the article. Research objective was to determine the reliable recognition of the development of newborn encephalopathy at the age of the first two weeks of life according to neurological examination and neurosonography parameters with Doppler study of cerebral vessels. Features of the neurology status and data of ultrasonic examination of brain with Doppler study of cerebral vessels in 58 newborns with pathology of the nervous system and 23 healthy newborns are investigated. 10 sings of the neurological status and 10 parameters of ultrasonic examination are analyzed. By results of the obtained findings, prognostic rule is developed, governed by application of discriminant analysis of the studied signs, allowing to diagnose encephalopathy in newborn with sensitivity and specificity of 95% in the first week of life. Its application promotes timely identification and the beginning of therapy at infants from risk group of development of severe neurological dysfunction and preventing the growth of disability among infants. © 2017 Team of Authors

ТЕХНОЛОГИЯ ПАРАЛЛЕЛЬНЫХ ВЫЧИСЛЕНИЙ ЗАДАЧИ ТЕПЛОВЛАГОПЕРЕНОСА В ПРОГРАММНОМ КОМПЛЕКСЕ SPS

A numerical model of non-isothermal moisture transfer in soil is developed and adapted for used media. An SPS software module which allows carrying out long-term forecasting for the solution of three-dimensional non-isothermal heat and moisture transfer of contaminants in soil is developed.Предлагается математическая модель, разработанная с учетом существующих численных моделей неизотермического влагопереноса в почве и адаптированная для конечно- элементного решения задачи тепловлагопереноса в природных дисперсных средах в трехмерной постановке. Разрабатывается программный комплекс SPS, позволяющий осуществлять долгосрочное прогнозирование для решения трехмерной задачи неизотермического тепловлагопереноса загрязняющих веществ в почве

РЕАЛИЗАЦИЯ АЛГОРИТМА ПАРАЛЛЕЛЬНЫХ ВЫЧИСЛЕНИЙ ЗАДАЧИ НЕИЗОТЕРМИЧЕСКОГО ВЛАГОПЕРЕНОСА В ПРИРОДНЫХ ДИСПЕРСНЫХ СРЕДАХ

The results of the developed algorithm of parallel computing program implementation of non-isothermal moisture transfer in natural dispersed environments in the Matlab package are considered. Comparative studies of the computing model performance of contaminants transport by the proposed algorithm and use of Matlab at the standard instruction level showed a significant reduction in compu-tation time.Предлагаются результаты программной реализации в пакете Matlab разработанного ав-торами алгоритма параллельных вычислений задачи неизотермического влагопереноса в природных дисперсных средах. Проведенные сравнительные исследования производительности вычислений модели переноса загрязняющих веществ по предложенному алгоритму и с помощью пакета Matlab на уровне стандартных инструкций показали значительное сокращение времени вычислений

Irreversible Aging Dynamics and Generic Phase Behavior of Aqueous Suspensions of Laponite

In this work we study the aging behavior of aqueous suspension of Laponite having 2.8 weight % concentration using rheological tools. At various salt concentration all the samples demonstrate orientational order when observed using crossed polarizers. In rheological experiments we observe inherent irreversibility in the aging dynamics which forces the system not to rejuvenate to the same state in the shear melting experiment carried out at a later date since preparation. The extensive rheological experiments carried out as a function of time elapsed since preparation demonstrate the self similar trend in the aging behavior irrespective of the concentration of salt. We observe that the exploration of the low energy states as a function of aging time is only kinetically affected by the presence of salt. We estimate that the energy barrier to attain the low energy states decreases linearly with increase in the concentration of salt. The observed superposition of all the elapsed time and the salt concentration dependent data suggests that the aging that occurs in low salt concentration systems over a very long period is qualitatively similar to the aging behavior observed in systems with high salt concentration over a shorter period.Comment: 27 pages, 8 figures. Langmuir, in pres

МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ РАСПРОСТРАНЕНИЯ ЗАГРЯЗНЯЮЩИХ ВЕЩЕСТВ ОТ ЭКОЛОГИЧЕСКИ ОПАСНЫХ ОБЪЕКТОВ С УЧЕТОМ ПОВЕРХНОСТНОГО СТОКА И ИНФИЛЬТРАЦИИ

A mathematical model of pollutants' migration from environmentally hazardous facilities considering surface water flow and infiltration is developed. The methods for the numerical solution of differential equations describing the transport of pollutants and their entry into the groundwater from the surface of the soil due to the infiltration of precipitation are introduced. The developed mathematical model was implemented with the use of MATLAB and COMSOL software.Разработана математическая модель распространения загрязняющих веществ от экологически опасного объекта с учетом поверхностного стока и инфильтрации. Разработаны методы численного решения дифференциальных уравнений, описывающих перенос загрязняющих веществ и их поступление в грунтовые воды с поверхности почвы за счет инфильтрации атмосферных осадков. При помощи программных комплексов MATLAB и COMSOL осуществлена компьютерная реализация разработанной математической модели

АЛГОРИТМ ПАРАЛЛЕЛЬНЫХ ВЫЧИСЛЕНИЙ ЗАДАЧИ НЕИЗОТЕРМИЧЕСКОГО ВЛАГОПЕРЕНОСА В ПРИРОДНЫХ ДИСПЕРСНЫХ СРЕДАХ

The modeling of nonisothermal heat and moisture transfer in natural disperse environment is considered. It is necessary to apply parallel computing techniques for solving these problems in three-dimensional setting. An algorithm of parallel computing of nonisothermal heat and moisture transfer is based on the creation of distributed data array by solving a system of equations of nonisothermal heat and moisture transfer with the use of finite element method.Рассматриваются особенности моделирования неизотермического влагопереноса в природных дисперсных средах. Показана необходимость применения параллельных технологий вычислений при решении указанных задач в трехмерной постановке. Предложен алгоритм параллельных вычислений неизотермического влагопереноса, который базируется на создании распределенного массива данных при решении системы уравнений неизотермического влагопереноса методом конечных элементов

Clinical manifestations of the onset and diagnostic problems in children with moyamoya disease

Moyamoya disease in children is a rarely diagnosed entity. Frequent headache is the first symptom of the disease. Headache associated with moya-moya disease (HAMD) is a separated entity reported in the literature. Variants of onset, a spectrum of primary diagnoses and diagnosis verification rate of moyamoya disease in 7 children are presented. A clinical case of moya-moya disease in a 9-year boy, who was primarily diagnosed with migraine with aura, is reported. The results presented by the authors as well as literature data indicate the necessity of using magnetic-resonance angiography in children with headache attacks and focal neurologic symptoms to identify this progressive vascular pathology and timely recommend a surgical treatment. © 2016, Media Sphera. All rights reserved