We investigate an online version of a basic scheduling problem where a set of jobs has to be scheduled on a number of identical machines so as to minimize the makespan. The job processing times are known in advance and preemption of jobs is allowed. Machines are non-continuously available, i.e., they can break down and recover at arbitrary time instances not known in advance. New machines may b...

The conceptual design of most computer-based information systems reflects a dualism of technology. During the development phase, part of the work-domain related knowledge is formalized and encoded in the software, making it difficult for users to reflect upon and use this knowledge. This design/use-dualism contributes to the deterioration of the interpretive flexibility of information systems. ...

In this paper, the authors have focused on the stochastic analysis of an internet data center (IDC), which consists of a database main server connected to a redundant server. Observing the different possibilities of functioning of the system, analysis has been done to evaluate the various reliability characteristics of the system. The system can completely fail due to failure of redundant serve...

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 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...

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...