Influence of the arctic climatic conditions of the Kola Peninsula on the reactivity of the sympathetic-adrenal and cardiovascular systems of junior high school children

The growth and development of children aged 7-10 years takes place under conditions of continuous learning, and the level of fatigue increases by the end of the school year. Environmental factors of the Kola Peninsula play a special role here. the process of adaptation of the organism takes place in all age and gender groups. The most obvious is the reactivity of the cardiovascular and sympathetic-adrenal systems to physical load, which enhances the correlation links between indicators of the two active systems. It happens in the following way: by the end of the academic year, in all age and gender groups before the polar day, a proven shift of the observed indicators is recorded. The results obtained provide a comprehensive picture of age-related adaptation changes and increase in the level of fatigue in the arctic climate conditions of the Kola Peninsula. Examinations of children aged 7-10 years showed that age dynamics of cardiovascular and sympathoadrenal systems indicators is non-linear and significantly depends on specific parts of the academic year. This may be due to the periodicity of the polar night, namely, as the functional capabilities of particular systems tend to increase with age, certain indicators have a wave-like character of changes

Электропривод приёмного устройства линии производства гибких нагревательных элементов

Целью работы является разработка и исследование системы векторного управления асинхронным двигателем с короткозамкнутым ротором для приёмного устройства линии производства гибких нагревательных элементов с инвертором с синусоидальной ШИМ с предмодуляцией третьей гармоникой, а также исследование свойств и выявление достоинств и недостатков различных способов управления автономных инверторов напряжения по принципу широтно-импульсной модуляции.The aim of the work is to develop and analyze the system of vector control of induction motor with squirrel-cage rotor for take-up machine of the cable production line with the voltage source inverter with third harmonic injection sinusoidal PWM, as well as to analyze the properties and identify the advantages and disadvantages of various methods of control of voltage source inverter on the principle of pulse width modulation

Inspecting aviation composites at the stage of airplane manufacturing by applying 'classical' active thermal NDT, ultrasonic thermography and laser vibrometry

The results of applying three nondestructive testing techniques to the inspection of parts of a new Russian TVS-2DTS airplane made of carbon fiber reinforced plastic are presented. A basic technique implemented in workshop conditions implements optical stimulation of inspected parts. The usefulness of ultrasonic infrared thermography combined with laser vibrometry in the evaluation of parts with complicated geometry is illustrated. Samples with artificial and real defects have been tested in workshop conditions

Interpretation of Social Interactions: Functional Imaging of Cognitive-Semiotic Categories During Naturalistic Viewing

Social interactions arise from patterns of communicative signs, whose perception and interpretation require a multitude of cognitive functions. The semiotic framework of Peirce’s Universal Categories (UCs) laid ground for a novel cognitive-semiotic typology of social interactions. During functional magnetic resonance imaging (fMRI), 16 volunteers watched a movie narrative encompassing verbal and non-verbal social interactions. Three types of non-verbal interactions were coded (“unresolved,” “non-habitual,” and “habitual”) based on a typology reflecting Peirce’s UCs. As expected, the auditory cortex responded to verbal interactions, but non-verbal interactions modulated temporal areas as well. Conceivably, when speech was lacking, ambiguous visual information (unresolved interactions) primed auditory processing in contrast to learned behavioral patterns (habitual interactions). The latter recruited a parahippocampal-occipital network supporting conceptual processing and associative memory retrieval. Requesting semiotic contextualization, non-habitual interactions activated visuo-spatial and contextual rule-learning areas such as the temporo-parietal junction and right lateral prefrontal cortex. In summary, the cognitive-semiotic typology reflected distinct sensory and association networks underlying the interpretation of observed non-verbal social interactions