in this paper, an exact geometric algorithm is presented for solving two-job sequencing and scheduling problems in flexible flow shop and job shop environments while the resources are (un)available in some time periods and processors (un)availability is the same in all work centers. this study seems utterly new and it is applicable to any performance measure based on the completion time. the in...

As storage systems continue to grow (due to the introduction of new IO interconnect such as FibreChannel), their design and configuration continues to be a costly and difficult task which involves complex trade-offs in cost, performance and availability. We focus on the problem of designing large storage systems to meet workload availability requirements (we use the term “workload unit” to refe...

transfer of patients from the cardiac intensive care unit to the general ward, is one of the main reasons for anxiety. given that the transfer anxiety may be due to receive at least, inconsistent or do not receive enough information before the patients leaving the intensive care unit, therefore, this study aimed to determine the effect of information provision on anxiety levels in patients tran...

objective: professional nursing is recognised for having high working anxiety levels due to continuous interaction with patients, their family and colleagues in a high stress working environment. as a compilation of non cognitive skills and abilities, emotional intelligent could be helpful in controlling stress and increasing the individual’s productivity at work. intensive care units’ employee...

the issue of unit commitment is one of the most important economic plans in power system. in modern and traditional power systems, in addition to being economical of the planning, the issue of security in unit operation is also of great importance. hence power system operation confronts units’ participation and input considering network security constrains. the issue of units’ participation is ...

The purpose of the present study is to carry out cost-benefit analysis of a single-unit system subject to random shocks. The operative unit may be affected by the impact of random shocks with some probabilities. The unit may fail completely due to the reasons other than shocks. There is a single server who visits the system immediately. The maintenance of the unit is carried out by the server i...

The concerned paper illustrates the comparison of two stochastic models of a cable manufacturing plant with varying demand. Here, it shows the comparison between a single unit system (Model 1) and a two-unit cold standby system (Model 2). In Model 1, the system is either in working state on some demand or put to shut down mode on no demand. In Model 2, at initial stage, one of the units is oper...