LH*g is a high-availability extension of the LH* Scalable Distributed Data Structure. An LH*g file scales up with constant key search and insert performance, while surviving any single-site unavailability (failure). Highavailability is achieved through new principle of record grouping. A group is a logical structure of up to k records, where k is a file parameter. Every group contains a parity ...

This paper concerns a dynamic multi-commodity capacitated facility location problem in supply chain, where different products flow throughout different layers of supply chain over a time horizon to meet customers’ demand. The capacity and the location of facilities need to be changed for supply chain to operate efficiently and respond quickly to demand changes. Relocating facilities or changing...

Massive computations in today's computer applications necessitate the use of high-performance computing environments. Unfor-tunately, high costs and power management must be addressed while operating these Volunteer (VC) enables creation a global network devices capable accumulating their to outperform any supercomputer. VC refers underutilized resources donated by thousands volunteers who want...

In generation expansion planning, reliability level is the key criterion to ensure enough above peak demand in case there are any outages. This must be appropriately optimized provide a reliable system with minimum cost. Currently, method determine an optimal mainly focused on reserve margin, accustomed used by several utilities. However, Loss of Load Expectation (LOLE) more suitable for high p...

Unavailability of a ship propulsion system under aging effects and proper maintenance is estimated using GO‐FLOW. GO‐FLOW is an effective software tool for the unavailability analysis of complex systems. Aging effects are incorporated into GO‐FLOW using a time‐dependent technique and assuming a linear aging model. The results show that the aging effects and improper maint...

In this work we developed EPQ models for deteriorating items by considering stochastic machine unavailability and price-dependent demand. Moreover, we approach the distribution of the machine unavailability using kernel density estimation. Therefore, the assumption of any distribution models, such as uniformly or exponentially distribution can be neglected and the shape of the distribution will...

Introduction: Neutron contamination is very harmful for the patients receiving radiation therapy due to the high relative biological effect of neutrons. Medical linear accelerators head are made up of materials with high atomic numbers, and High-energy photons interaction with heavy materials can produce neutron contamination. In this study, neutron equivalent dose, neutron spe...