stress

Psychophysiological risks arising in the course of occupational activity of printing industry workers are investigated and presented in the form of a scheme, including cognitive and neuro-emotional overload, physical and sensory loads, high intensity of information flows, as well as irregular or shift work schedules. The study employs a set of methods: theoretical (analysis of scientific literature), empirical (observation), and ergonomic (assessment of working conditions).

This article presents an analytical and engineering justification for the use of flat elastic elements in eccentric-pendulum-type resonant vibration tables. The study addresses the design, calculation, and structural optimization of resonant elastic nodes, which ensure directional oscillations, define dynamic performance, and determine the durability and reliability of the machine.

Abstract. War is one of the most tragic phenomena in human activity, endangering the very existence of childhood. The devastating consequences of war compel greater attention to the psychological state of families. In most cases, parents raise children alone under difficult conditions. Particularly severe challenges arise in the upbringing of children in displaced families and in families where one or both parents are defending Ukraine from Russian occupiers.

Mechanical transmissions are widely used in various types of structures and mechanisms in different branches of the machine-building industry. One such branch is medicine. Devices with mechanical components are also used for patient rehabilitation in the postoperative period. Such mechanisms are known as orthoses. Structures of this type must meet several strict requirements—for example, compactness, light weight, safety, reliability, and others. Orthoses must reproduce the lost functions of a healthy person as accurately as possible.

Abstract. Studying language should be carried out together with other psychological processes because all of them have a connection with each other and influence. This research has the purpose of theoretically analyzing the concept of multilingualism and its varieties, empirically proving the influence of multilingualism especially on functioning aspects in the emotional and volitional sphere that is to susceptibility to stress and ability to self-manage.

Understanding the mechanics of a turbulent boundary layer is important, since in most practical problems it is the turbulent boundary layer that is primarily responsible for the surface shear force or surface resistance. The velocity distribution in a turbulent boundary layer on a flat plate is considered parallel to the flow. It is important to know the correlations between the boundary layer thickness and shear stress. Therefore, the problem of controlling the flow in a boundary layer on a flat plate is one of the important problems of boundary layer mechanics.

A variety of mechanisms, each designed with distinct specifications, find application in diverse sectors of the machine engineering industry. The utilisation of apparatuses comprising mechanical components in the field of medicine is also evident in the context of patient rehabilitation. These mechanisms are orthoses. The design of such systems is subject to a stringent set of specifications, which include compactness, light weight, and reliability. The purpose of orthoses is to replicate lost functions as closely as possible to a healthy human.

Mechanisms with gears are used in various fields of mechanical engineering according to the needs. Orthoses are used to rehabilitate patients in the postoperative period or during the restoration of lost limb functions. For patients to comfortably use orthoses, they must be compact, lightweight, and reliable. Gear shafts are the most loaded structural elements of such devices.

In fluid and gas mechanics, a subject that has been the focus of considerable scholarly attention is the modeling of flow phenomena on streamlined surfaces. These surfaces, which are typically installed in a parallel orientation to the direction of the free stream, play a pivotal role in the study of fluid dynamics. The boundary layer theory represents a pivotal branch of fluid dynamics, given the airflow plate is characterized by a high Reynolds number of airflow velocity entering the plate's plane surface contexts.

The issue of determining cutting forces in machining processes is relevant due to the need to improve the efficiency, quality, and accuracy of hard-to-machine materials. In particular, preventive heating of the workpiece can reduce the mechanical resistance of the machined material, which reduces the load on the tool and increases its service life. The article aims to study and analyze the equipment design for measuring cutting forces under conditions of preventive heating.