 In this paper we develop queuing model results for a single “automated” workstation that receives jobs from another automated workstation. An automated workstation is a server with deterministic processing times that experiences random operating times between failures, and then subsequent random repair times. We develop analytical expressions for the queue size distribution, the average numbe...

The requirement of social distancing during the COVID-19 pandemic has presented significant challenges for high-rise buildings, which heavily rely on elevators vertical transportation. In particular, need reduced elevator capacity typically by at least two-thirds or as much over 90 % $90\%$ normal amount. This reduction is a serious concern, capacities cause large queues to build up in lobbies,...

Distributed transactional memory (TM) promises to alleviate difficulties with lock-based (distributed) synchronization and object performance bottlenecks in distributed systems. In distributed TM systems, both the management and consistency of a distributed transactional object are ensured by a cache-coherence protocol. In this paper, we formalize two classes of cache-coherence protocols: distr...

Distributed transactional memory (TM) promises to alleviate difficulties with lock-based (distributed) synchronization and object performance bottlenecks in distributed systems. In distributed TM systems, both the management and consistency of a distributed transactional object are ensured by a cache-coherence protocol. In this paper, we formalize two classes of cache-coherence protocols: distr...

Queuing systems are an important building block for performance evaluation in various application areas, due to their powerful, yet simple nature. Although it is often possible to perform an analytical evaluation of a queuing model, simulation of queuing systems remains an important technique in the context of performance evaluation. In order to speed up queuing simulation executions, parallel ...

Many measurement studies showed that network traffic usually exhibits self-similar nature, meanwhile, wireless fading channels lead to the time-variant service rates of network nodes. Compared with classical queuing systems with Markov sources or constant service rates, the queuing system with self-similar input in a wireless fading channel is more complicated, and it is very difficult to obtai...

This article proposes a versatile model of a multiservice queueing system with elastic traffic. The model can provide a basis for an analysis of telecommunications and computer network systems, internet network systems in particular. The advantage of the proposed approach is a possibility of a determination of delays in network nodes for a number of selected classes of calls offered in modern t...

Background Traditionally, embryo incubation and assessment daily has been under a light microscope, these observations are inevitably restricted to specific times and considering that the development of the embryo is a dynamic process, several critical stages in between observations may go unnoticed. For this reason, the new technologies, time lapse monitoring, have focused on the research for ...

In this paper provides the results of research on the development of the method of constructing a model of customs procedures in terms of the theory of queuing systems based on their description by means of functional modeling IDEF0. The technique is based on use of the integrated IDEF0 models and theory of queuing systems with the ability to transition from a description of the system in IDEF0...