Materials extrusion-inspired engineering reflection of social pressure-induced environmental impact on academy community well-being.

BACKGROUND: Existing issues with student mental health are the sources of ongoing violation of academic and educational integrity in learning and instructional dynamics in all educational institutions worldwide. OBJECTIVE: This didactical paper addresses the practical case of educational integrity violations induced by student mental illness. It presents a thought-provoking unified viewpoint of the existence of a non-obvious geometric analogy between the irreversible psycho-social process of mental disorder growth and the irreversible pressure forming-induced deformation process of materials extrusion through an angular domain. METHODS: This paper uses the method of geometric analogy between the dynamics of social irreversible processes in human society and technical irreversible processes in materials extrusion. RESULTS: The novel analogy between the loss of elliptical shape of an initial circular material element within pressure-extruded material and the development of student mental inadequacy during intensive university education was firstly studied and analyzed in detail. CONCLUSIONS: The author-proposed original socio-technical cross-disciplinary analogy improves and broadens student understanding of nonlinear dynamics both in the technical processes of macroscopic rotation formation in pressure-formed material and in the bio-social processes of psycho-neurological pathology development within a learner's mind.

Educational research into socio-economic dynamics of university graduate employment: Triple analogy-based physics-and-engineering approach to labor market oscillations.

BACKGROUND: Better student understanding of the dynamic trends in graduate employment requires the development of the author's description of this multidisciplinary social problem. OBJECTIVE: This educational paper is focused on an author-proposed engineering-friendly description of oscillatory dynamics in the employment market for university graduates. METHODS: This didactical paper widely uses computational methods of oscillations theory, theory of electrical and hydraulic circuits as well as concepts of physical analogies and similarity. RESULTS: The generalized character of the employment-related oscillations in the studied social system of employees was didactically enhanced through the original introduction of two technical analogies with similar oscillations in the electrical system of an LC-field-effect transistor oscillator and the mechanical system of a hydraulic ram pump. CONCLUSIONS: The author-proposed triple physics-and-engineering analogy for the periodic oscillations in the socio-economic problem in graduate employment provides a broadening of the cross-disciplinary ideas of engineering students about oscillatory dynamics in the social, electrical and hydraulics systems. It was found in the case of the Donbass State Engineering Academy (Kramatorsk, Ukraine), that this original author's approach provides simultaneous enhancement of the cross-disciplinary undergraduate engineering curriculum in the courses of economics, management, higher education pedagogy, physics, hydraulics and electrical engineering.

Calculation of recovery plasticity in multistage hot forging under isothermal conditions.

A widely used method for hot forming steels and alloys, especially heavy forging, is the process of multistage forging with pauses between stages. The well-known effect which accompanies multistage hot forging is metal plasticity recovery in comparison with monotonic deformation. A method which takes into consideration the recovery of plasticity in pauses between hot deformations of a billet under isothermal conditions is proposed. This method allows the prediction of billet forming limits as a function of deformation during the forging stage and the duration of the pause between the stages. This method takes into account the duration of pauses between deformations and the magnitude of subdivided deformations. A hot isothermal upsetting process with pauses was calculated by the proposed method. Results of the calculations have been confirmed with experimental data.

Spherical pendulum small oscillations for slewing crane motion.

The present paper focuses on the Lagrange mechanics-based description of small oscillations of a spherical pendulum with a uniformly rotating suspension center. The analytical solution of the natural frequencies' problem has been derived for the case of uniform rotation of a crane boom. The payload paths have been found in the inertial reference frame fixed on earth and in the noninertial reference frame, which is connected with the rotating crane boom. The numerical amplitude-frequency characteristics of the relative payload motion have been found. The mechanical interpretation of the terms in Lagrange equations has been outlined. The analytical expression and numerical estimation for cable tension force have been proposed. The numerical computational results, which correlate very accurately with the experimental observations, have been shown.