Sunspot waves and flare energy release

We address a possibility of the flare process initiation and further maintenance of its energy release due to a transformation of sunspot longitudinal waves into transverse magnetic loop oscillations with initiation of reconnection. This leads to heating maintaining after the energy release peak and formation of a flat stage on the X-ray profile. We applied the time-distance plots and pixel wavelet filtration (PWF) methods to obtain spatio-temporal distribution of wave power variations in SDO/AIA data. To find magnetic waveguides, we used magnetic field extrapolation of SDO/HMI magnetograms. The propagation velocity of wave fronts was measured from their spatial locations at specific times. In correlation curves of the 17 GHz (NoRH) radio emission we found a monotonous energy amplification of 3-min waves in the sunspot umbra before the 2012 June 7 flare. This dynamics agrees with an increase in the wave-train length in coronal loops (SDO/AIA, 171 {\AA}) reaching the maximum 30 minutes prior to the flare onset. A peculiarity of this flare time profile in soft X-rays (RHESSI, 3-25 keV) is maintaining the constant level of the flare emission for 10 minutes after the short impulse phase, which indicates at the energy release continuation. Throughout this time, we found 30-sec period transverse oscillations of the flare loop in the radio-frequency range (NoRH, 17 GHz). This periodicity is apparently related to the transformation of propagating longitudinal 3-min waves from the sunspot into the loop transverse oscillations. The magnetic field extrapolation showed the existence of the magnetic waveguide (loop) connecting the sunspot with the energy release region. A flare loop heating can be caused by the interaction (reconnections) of this transversally oscillating waveguide with the underlying twisted loops.Comment: 7 pages, 9 figure

Methodology development for the sustainability process assessment of sheet metal forming of complex-shaped products

© Published under licence by IOP Publishing Ltd. A methodology was developed for automated assessment of the reliability of the process of sheet metal forming process to reduce the defects in complex components manufacture. The article identifies the range of allowable values of the stamp parameters to obtain defect-free punching of spars trucks

Aspects of a healthy lifestyle

A healthy lifestyle includes not only sports and limit yourself from bad habits, but many another aspects. We consider the most important criteria of the leading of a healthy lifestyle, such as elaborated regime of the day, healthy sleep, proper nutrition, personal hygiene and active life in this project. The main thing in a healthy way of life is an active creation of health, including all of its componentsЗдоровый образ жизни предполагает не только занятие спортом и ограничение себя от вредных привычек, но еще множество аспектов. В данной работе мы рассмотрим самые важные критерииведения здорового образа жизни, такие как выработанный режим дня, здоровый сон, правильное питание, личная гигиена и подвижный образ жизни.Главное в здоровом образе жизни – это активное творение здоровья, включая все его компонент

Ultrasound in the manufacture of medical instruments

© Published under licence by IOP Publishing Ltd. The article contains information on the properties and possibilities of ultrasonic oscillations of high intensity, the features of the application of ultrasonic vibrations for the intensification of processes occurring in liquid, solid, gaseous media, polymeric materials, as applied to solving problems in the chemical, biotechnological, food industries and related industries. The methods of using ultrasound for cleaning parts on grinding and polishing operations, which are primarily intended for use in the manufacture of medical instruments, are described in more details

Automated Generation of Rational Sheet Metal Forming Technology Variants at Process Engineering Stage

© 2017 The Authors. Published by Elsevier Ltd. The procedure of automated process reliability evaluation was developed in order to prevent recurrent defects in parts manufactured by die stamping. The procedure is based on the analysis of such factors as part design, material, its mechanical and physical properties; equipment parameters, tool performance, etc. The list of reliability factors may vary according to a type of operation as deformation process is different for each group of operations. The adjustment of stamping process reliability performance prevents any defects emerging during production of critical parts as early as the PPE stage. The automated control system for IE design at the PPE stage provides better part quality and lower production expenses thanks to IP reliability

An expert system for ensuring the reliability of the technological process of cold sheet metal forming

In order to exclude periodic defects in the parts manufacturing obtained by cold sheet metal forming a method of automated estimation of technological process reliability was developed. The technique is based on the analysis of reliability factors: detail construction, material, mechanical and physical requirements; hardware settings, tool characteristics, etc. In the work the expert system is presented based on a statistical accumulation of the knowledge of the operator (technologist) and decisions of control algorithms

Imrovement of the cold forming technology of the parts such as longeron

© Published under licence by IOP Publishing Ltd. As a result of modeling in LS-PREPOST preprocessor of the program LS-DYNA a range of radii of curvature edge transition matrix (27,5 °≤ R ≤ 48 °) is obtained, which allows to produce defect-free stamping slots for longeron shock absorbers of tractors KAMAZ-5460