The features of the amplitude-frequency and temporal parameters of magnetic fields created by MRI 3 T the gradient coils under various modes of its operation has studied. Low-frequency magnetic field induction changes has pulsed form - single pulses and various pulses shapes, different polarities and durations. Adequate controlled parameters for their hygienic evaluation are proposed

The increasing use of MRI equipment increases the number of medical and technical personnel at risk of exposure to EMF and workplace noise. Existing domestic and foreign and regulatory documents defining controlled indicators, permissible exposure levels, control methods need adjustments that require additional research.

The study focuses on switching from talk to work in an "inclusivity workshop" for people with mental disabilities. Work activities and conversation about general topics can be approached from the perspective of multiactivity and considered courses of actions intertwined in social interaction. The order of activities is negotiated among participants using both linguistic and non-linguistic means. The data are extracts of video recordings containing a participant getting others to do things. The paper provides multimodal analysis of 6 cases of an instructor getting an autistic participant to switch to work, which occurred within a 17-minute conversation about animals. In the data, the autistic participant never provides a second-pair response to a directive. In 5 out of 6 cases analysed in the paper he fulfils the action to different extents, demonstrating various degrees of involvement. Getting the autistic person to switch to work is more effective when suggesting actions one by one, through concrete embodied actions, and when orienting to phases of the ongoing talk. The study highlights differences between autistic and non-autistic participants switching from one course of actions to another. Considering goals of an inclusivity workshop, success of switching to work can be also determined by the opportunities for the smooth conversation.

Introduction. Magnetic resonance imaging (MRI) is one of the most dynamically developing, high-tech diagnostic methods. At the same time, the specific features of the electromagnetic environment and noise exposures at the medical and technical personnel operating and maintaining MRI workplaces are not well understood and are currently not taken into account when conducting a hygienic assessment of working condition in the Russian Federation. The aim of study is scientific substantiation of the need to improve the hygienic assessment of electromagnetic and noise conditions in the workplace of the staff of MRI departments. Materials and methods. An analytical method to evaluate the current domestic and foreign regulatory and methodological documents that determine the hygienic assessment requirements for electromagnetic environment and noise in MRI departments was used. More than 4 thousand measurements of the intensity of electromagnetic fields and noise in 88 rooms in Moscow equipped with different types of MRI (from 0,1 mT to 3 T) and studies of the performing duration various types of work and electromagnetic field and noise exposure on personnel was done. The amplitude-time and frequency parameters of the variables of the electromagnetic field (EMF) and sound pressure detailed studies have been carried out. Results. Significant differences in controlled indicators, acceptable exposure levels, and control methods has revealed by critical analysis of domestic and foreign hygienic regulatory and methodological documents. The studies showed that the medical and technical personnel of MRI departments are exposed with high spatial and temporal gradients static magnetic fields and extreme levels of noise during diagnostic work in the immediate vicinity of the tomograph magnet. The presence of time-varying magnetic fields in a wide range of low frequencies and radio frequencies having a complicated (pulsed) waveform is a feature of the electromagnetic environment in MRI. New standardized control parameters and limit levels for low-frequency ranges magnetic fields for their adequate hygienic assessment are proposed. Conclusion. The studies made it possible to substantiate the proposals the improving of electromagnetic field and noise hygienic assessment at the MRI staff workplaces.

Introduction. Currently, in force hygienic normative-methodical documents (SanPiN 2.2.2/2.4.1340-03, SanPiN 2.2.2/2.4.2620-10, SanPiN 2.2.4.3359-16) do not allow to objectively estimating EMF on modern workplaces of personal computers (PCs) users by and other means of information and communication technologies (ICT). Aim of the study is scientific substantiation of improvement of normative-methodical documentation on hygienic regulation and evaluation of EMF in computerized workplaces using modern ICT. Material and methods. The analytical method of evaluation of modern normative-methodical documentation regulating hygienic norms and methods of evaluation of EMF in the workplace of PC users is used. More than 11 thousand measurements of EMF levels were carried out. Results. A critical analysis of the current hygienic regulations of EMF in the workplace of PC users and other means of ICT in Russia showed they to be not scientifically justified, and the existing methodology does not allow an adequate hygienic assessing of the electromagnetic environment (EME). The main sources forming EME on modern workplaces of PC users are both PCs, and switching power supplies, network support devices (UPS), cable lines, wiring, broadband wireless access systems (base stations, Wi-Fi routers, access points, external and built-in laptops USB modems), cell phones, lamps of local and general lighting. EMFs on a workplace of PC users are characterized by complex amplitude-frequency composition: electric and magnetic fields at frequencies of 30 Hz - 300 kHz, EMF at frequencies above 300 MHz, electrostatic fields, hypogeomagnetic fields. New EMF hygienic standards at workplaces of PC users and other means of ICT are scientifically proved. Conclusion. The introduction of new regulations will ensure an adequate hygienic assessment of EMF in the workplaces of PC users in each normalized frequency band in total from all sources and will eliminate the current contradictions and shortcomings. The introduction of new EMF hygienic standards in the practice of sanitary and epidemiological supervision will preserve the health of the PC users and other ICT facilities.