this paper studies an m/g/1 repairable queueing system with multiple vacations and n-policy, in which the service station is subject to occasional random breakdowns. when the service station breaks down, it is repaired by a repair facility. moreover, the repair facility may fail during the repair period of the service station. the failed repair facility resumes repair after completion of its re...

Usability engineering is the process of involving users throughout the development cycle to produce user-centric, easy to use software. The process model of involving users throughout this cycle is called user-centered design. Although a logical and proven model, the success of this process is often impeded by poor transference of knowledge between usability engineers, interaction designers, an...

The Volunteer Management ReportVolume 28, Issue 10 p. 1-1 Stay Connected Avoid Breakdowns Between Staff And Communication Kerry Nenn, NennSearch for more papers by this author First published: 09 September 2023 https://doi.org/10.1002/vmr.32159Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare text full-text accessPlease r...

In this work, we review the stochastic decomposition for the number of customers in M/G/1 retrial queues with reliable server and server subjected to breakdowns which has been the subject of investigation in the literature. Using the decomposition property of M/G/1 retrial queues with breakdowns that holds under exponential assumption for retrial times as an approximation in the non-exponential...

In this paper, we study the strong stability in the M/G/1 queueing system with breakdowns and repairs after perturbation of the breakdown’s parameter. Using the approximation conditions in the classical M/G/1 system, we obtain stability inequalities with exact computation of the constants. Thus, we can approximate the characteristics of the M/G/1 queueing system with breakdowns and repairs by t...

In this article, it is considered to analyze the reliability of TEM (traction electric machine) locomotives railways Republic Uzbekistan. To determine damage, most expedient and effective method will be extend life insulation by encapsulating local damage using impregnating materials heat radiation. Over past ten years, a stable tendency for breakdown turn-to-turn closure armature winding NB-51...

The electrical breakdown of a dielectric nanolayer between film electrodes under the combined action direct current and capacitor discharge makes it possible to form Josephson bridges with reproducible resistance exceeding 1 Ω. A new feature formation bridge during breakdown, which is preceded by series preliminary breakdowns (auto breakdowns) nanolayer, has been discovered. mechanism process r...

We evaluated a behavioral intervention for a 9-year-old girl with selective mutism. The intervention consisted of role play and video self-modeling. The frequency of spoken initiations, responses to questions, and communication breakdowns was measured during three social situations (i.e., ordering in a restaurant, meeting new adults, and playing with new children) and in three community setting...

Optimal preventive maintenance and repairmen policies for a system of machines subject to degradation with age and intermittent breakdowns and repairs are derived using optimal control theory. When this system of machines forms part of a dynamic process control system, a method of obtaining optimal closed-loop control law is indicated. I . INTRODUC~ON Many large industrial systems have two dist...

We consider scheduling on an unreliable machine that may experience unexpected changes in processing speed or even full breakdowns. Our objective is to minimize ∑ wjf(Cj) for any nondecreasing, nonnegative, differentiable cost function f(Cj). We aim for a universal solution that performs well without adaptation for all cost functions for any possible machine behavior. We design a deterministic ...