This paper deals with the M + 1 out-of-N:G system with correlated failure and single repair facility, where correlated failure means that i (1 ~ i ~ N) operating units in the system are possible to fail at the same time. We consider two repair policies, and under each repair policy Laplace transform of point-wise availability and reliability, meantime to the first system failure and stationary ...

this paper presents a strategy for using harmony search algorithm in facility layout optimization problems. in this paper an adapted harmony search algorithm is developed for solving facility layout optimization problems. this method finds an optimal facility arrangement in an existing layout. two real-world case studies are employed to demonstrate the efficiency of this model. a comparison is ...

background an effective emergency referral transport system is the link between the home of the pregnant woman and a health facility providing basic or comprehensive emergency obstetric care. this study attempts to explore the role of emergency transport associated with maternal deaths in unnao district, uttar pradesh (up).   methods a descriptive study was carried out to assess the causes of a...

In the uncapacitated facility location problem, given a graph, a set of demands and opening costs, it is required to find a set of facilities R, so as to minimize the sum of the cost of opening the facilities in R and the cost of assigning all node demands to open facilities. This paper concerns the robust fault-tolerant version of the uncapacitated facility location problem (RFTFL). In this pr...

PURPOSE The Ministry of Health and Welfare recently designated 35 major trauma-specified centers (MTSC). The purpose of this study is to determine changes in patient flow and designated hospitals, and to describe the role of the emergency medical information center (EMIC) in a regional trauma care system. METHODS Data of trauma patient inter-facility transfer arrangement by one EMIC were revi...

This paper examines communities’ accessibility to critical facilities such as hospitals, emergency medical services, and shelters when facing flooding. We use travel speed reduction account for flood-induced partial road failure. A modified betweenness centrality metric is also introduced calculate the criticality of roads connecting communities facilities. The proposed model are applied Delawa...

Optimizing system resilience is concerned with the development of strategies to restore a system to normal operations as quickly and efficiently as possible following potential disruption. To this end, we present in this article a bilevel mixed integer linear program for protecting an uncapacitated median type facility network against worstcase losses, taking into account the role of facility r...