Video-on-Demand (VOD) servers are becoming feasible. These servers have voluminous data to store and manage. If only disk-based secondary storage systems are used to store and manage this huge amount of data the system cost would be extensively high. A tape-based tertiary storage system seems to be a reasonable solution to lowering the cost of storage and management of this continuous data. How...

While we can now outsource data backup to third-party cloud storage services so as to reduce data management costs, security concerns arise in terms of ensuring the privacy and integrity of outsourced data. We design FADE, a practical, implementable, and readily deployable cloud storage system that focuses on protecting deleted data with policy-based file assured deletion. FADE is built upon st...

The economic benefit realized from energy storage units on the electric grid is linked to the control policy selected to govern grid operations. Thus, the Optimal Sizing and Placement (OSP) of such units is also dependent on the operating policy of the power network. In this work, we first introduce Economic Model Predictive Control (EMPC) as a viable economic dispatch policy for transmission n...

36 Software Considerations in Mass Storage Systems Bernard T. O'Lear and Joseph H. Choy Because they represent a large investment, mass storage systems must be designed to increase software longevity and minimize user changes. This generic MSS model maintains most implementations. 45 Experiments with Automatic File Migration D. H. Lawrie, J. M. Randal, and R. R. Barton Virtual memory techniques...

Cloud storages are generally hosted by third parties where data can be stored and shared. Cloud storage provides virtualized pools of storage and people buy or lease storage capacity from them. The security of data is major problem when people use commercial cloud services to store their data. To avoid unauthorized access, data should be encrypted before outsourcing. Instead of attribute based ...

Exposure of plants to ozone inhibits photosynthesis and therefore reduces vegetation production and carbon sequestration. The reduced carbon storage would then require further reductions in fossil fuel emissions to meet a given CO2 concentration target, thereby increasing the cost of meeting the target. Simulations with the Terrestrial Ecosystem Model (TEM) for the historical period (1860–1995)...

Advances in storage technologies are making it feasible to design video servers that are capable of supporting continuous, real-time delivery of multiple video streams simultaneously. One of the major design considerations for a large-scale video server is scalability, to admit and service thousands of subscriber requests simultaneously. In this paper, we deene and formulate various policies th...

The storage of hydrogen is considered as the bottleneck in the implementation of portable fuel cell power generating systems. The necessary experimental studies to discover and develop appropriate storage materials are always time-limited. We discuss herein the approach of an uncomplicated and accessible computationally based analysis of database knowledge towards the identification of promisin...

The volatility of wind power poses great challenges to the operation of power systems. This paper deals with the economic dispatch problems presented by energy storage in wind integrated systems. A policy iteration algorithm for deriving the cost optimal policy of real-time scheduling is proposed, taking the effect of wind forecast uncertainties into account. First, energy loss and use of fast-...

President Obama faces an old challenge of creating a national energy policy. That policy will be designed with multiple objectives in mind. After a year of record oil prices that added to U.S. economic troubles, some want an energy policy that will maintain lower energy prices. With nearly 150,000 troops still in Iraq and tensions raised with Russia over the Georgian invasion, some want an ener...