TO ASSESSMENT OF THE VALUE OF DYNAMIC LOAD OF FORESTRY MACHINES FROM THE INSTALLATION PLACE OF ITS SAFETY DEVICES

An integral part of the drive elements of machines in forestry are devices that ensure their protection against breakdowns during overloads. Safety devices can be installed on various parts of the kinematic chain of the machine drive elements: at the beginning, at the end or in the middle, and can also be built into the working unit (body). It is most advisable to install fuses closer to the end of the drive lines of the kinematic chain of the machine. If torque safety devices are installed at the beginning or in the middle of the drive, they are not in the overload zone (more often, overload occurs next to the working unit or directly on it). Under these conditions, the drive links of the kinematic chain are subject to overloads of various magnitudes. With distance from the place of occurrence of overload, the value of the value of the dynamic moment decreases due to elastic deformations and friction losses in the drive links of the machine. Consequently, there is a breakdown or destruction of parts and components of the drive, and the fuse itself does not work. Thus, in this article, using a calculated mathematical model of the actuation process of safety devices using a computer, calculations were carried out to determine the values of dynamic loads and an assessment was given in the case of installing a fuse at the beginning and at the end of the kinematic chain of the machine drive

DETERMINATION OF THE STATIC MOMENT OF THE RESISTANCE OF THE DRIVE SHAFT OF THE REPLACING MACHINE, CREATED BY THE MASS OF THE BULK ENVIRONMENT IN THE WORK TANK

Among the different types of shredding equipment, which is widely used in various industries of Ukraine, the most promising are machines with complex spatial movement of working tanks. Experimental studies of the movement of the bulk array in the middle of the working tank with transparent walls were performed. The positions of the moving links and the working capacity are set, at which the whole bulk array by its mass will create the greatest value of the static moment of resistance on the driving shaft of the machine. Analytical studies of the static moment of resistance formed on the drive shaft of the machine with complex spatial motion of the working tank as a result of the influence of gravity acting on the bulk array loaded into the tank, the corresponding mathematical dependences are obtained. The obtained research results will be useful in further determining the dynamic moment of resistance on the drive shaft, which will be created by moving the moving parts of the machine and the bulk array in the middle of the tank. Also, the results of research can be used by relevant machine-building enterprises at the stage of designing galvanizing types of equipment with tanks that perform complex spatial movement.

Introduction

This introductory essay opens by establishing the gap between the richness of Romantic-era literary periodicals and this genre’s ongoing marginality in the academic study of the period. Pushing back against a growing tendency to consign the era’s periodical literature to the margins of the “long eighteenth” or “long nineteenth” century, it stakes the Romantic period’s claim as a distinct and unusually dynamic moment in the history of British literary periodicals. Before concluding with a brief synopsis of the volume’s contents and organization, it also explains the rationale for using a single magazine, Blackwood’s, to illustrate the brilliance, range, and sophistication of the age’s great periodicals.

A dynamic, imperturbable link between midbrain activity and saccade velocity

We make a saccadic eye movement once every few hundred milliseconds; however, the neural control of saccade execution is not fully understood. Dynamic, moment-by-moment variations in saccade velocity are typically thought to be controlled by neurons in the lower, but not the upper regions of the brainstem. In a recent report, Smalianchuk et al. (Smalianchuk I, Jagadisan UK, Gandhi NJ. J Neurosci 38: 10156–10167, 2018) provided strong evidence for a role of the superior colliculus, a midbrain structure, in the instantaneous control of saccade velocity, suggesting the revision of long-standing models of oculomotor control.

Moments of Inertia of SDIBs in A = 190 Mass Region using VMI Model

A lot of identical bands are known at present in the Normal Deformed (ND) region. In our study of the occurrence and properties of identical bands in Super-Deformed (SD) nuclei we first applied the modified Variable Moment of Inertia (VMI) model to extract the band-head spin of Super-Deformed bands. The calculated transition energies, level spins and dynamic moment of inertia are systematically examined. Then, in the framework of theoretical model several identical bands are identified. The kinematic and dynamic moment of inertia have been calculated for the six pairs of Super-Deformed Identical Bands (SDIBs) which was not reported earlier in the literature. Thus, the results are significant. In all the cases J(2) is significantly higher than J(1) over a large range of frequency.

Beyond Homo Laborans

This article responds to the critique of productivist essentialism, which is the view that the human is the productive animal, made against Marx. The author argues against this view and holds that Marx introduces a dialectical account of human essence with the notion of species being in the 1844 Manuscripts, which he then develops in The German Idology. This account of essence includes a static and dynamic moment, and in capitalism, the dialectic of essence has resulted in the appearance of the human as the productive animal. Finally, the author argues that Marx’s critique of production and dialectical account of human essence allow us to better think the possibilities for a post-work future.

Effect of Intermediate Support on Instabilities of a Cantilever With Terminal Dynamic Moment

The stability characteristics of a cantilever beam, with and without an intermediate support, subjected to a dynamic terminal moment, is investigated. The moment is assumed to be proportional to the slope of a point along the length of the beam. The proportionally constant, which can be positive or negative, is varied to find the critical stability point. In the absence of intermediate support, stability is lost through divergence when the dynamic moment is proportional to the positive slope, and through flutter when the dynamic moment is proportional to the negative slope. In contrast, the nature of instability switches between divergence and flutter, and between different flutter instability modes while undergoing flutter, in the presence of an intermediate support.