In design of the object-based storage system, cache design of the server becomes an important guarantee for improving service quality. This paper presents a cache design of load balancing system for object-based storage, which consists of three main aspects. First, the cache update policy is proposed. The strategy considers the overall cache as a pool, consistency and accuracy of updating is en...

Since the last two decades, container transportation system has been faced under increasing development. This fact shows the importance of container transportation system as a key role of container terminals to link between sea and land. Therefore, there is a continuous need for the optimal use of equipment and facilities in the ports. Regarding the complex structure of container ports, this pa...

Automated storage and retrieval systems (AS/RSs) are material handling systems that are frequently used in manufacturing and distribution centers. The modelling of the retrieval–travel time of an AS/RS (expected product delivery time) is practically important, because it allows us to evaluate and improve the system throughput. The free-fall-flow-rack AS/RS has emerged as a new technology for dr...

Role-based access control has been a focal area for many security researchers over the last decade. There have been a large number of models, and many rich specification languages. However there has been little attention paid to the way in which access control policy is stored persistently. This paper investigates policy storage from the perspective of access control to the policy itself, and o...

Geographically distributed cloud platforms enable an attractive approach to large-scale content delivery. Storage at various sites can be dynamically acquired from (and released back to) the cloud provider so as to support content caching, according to the current demands for the content from the different geographic regions.When storage is sufficiently expensive that not all content should be ...

Repositories collect and manage data holdings using a storage device. Mainly this has been a local file system, but recently attempts have been made at using open storage products and cloud storage solutions, such as Sun’s Honeycomb and Amazon S3 respectively. Each of these solutions has their own pros and cons but There are advantages in adopting a hybrid model for repository storage, combinin...

The WS-Policy framework has been introduced to allow policy to be expressed and associated with Web Services thereby enabling organizations to manage the quality of their services. How the specified polices are kept consistent with the organization’s regulations, and how to match service and client policies requirements for effective service discovery, are issues yet to be addressed. In this pa...

In this article, we develop an equilibrium model for storable commodity prices. The model is formulated as a stochastic dynamic control problem and considers two state variables the exogenous supply and the inventory. The inventory is a fully controllable endogenous variable. We assume that the uncertainty arises from the supply, which evolves as a Ornstein-Uhlenbeck stochastic process. This mo...