Cloud users (clients) with limited storage capacity at their end can outsource bulk data to the cloud storage server. A client can later access her data by downloading the required data files. However, a large fraction of the data files the client outsources to the server is often archival in nature that the client uses for backup purposes and accesses less frequently. An untrusted server can t...

Battery energy storage systems (BESSs) provide many benefits to the electricity grid, including stability, backup power, and flexibility in introducing more clean sources. As BESS penetration grows, knowledge of uncertainty battery's state charge (SOC) estimate is crucial for planning optimal power injection trajectories. This paper proposes a framework quantifying SOC estimation based on batte...

a field investigation was conducted to evaluate the effect of n and k fertilizers on qualitative and quantitative changes of potato tubers during five months of storage. this study was carried out in three replications at five levels (0, 60, 120, 180 and 240 kg/ha) of nitrogen and three levels (0, 75 and 150 kg/ha) of potassium fertilizer during 2004-2006. measurements were recorded monthly. th...

IT systems allow us to execute tasks more effectively and efficiently, provide a richer user experience and allow us to do things we could not imagine before. In addition to using IT systems, we also need to manage them. Managing IT systems is the theme of this thesis. More in particular, we focus on managing the software of IT systems and managing the data of IT systems. Software and data mana...

One of the big challenges in the world was the amount of data being stored, especially in Data Warehouses. Data stored in databases keep growing as a result of businesses requirements for more information. A big portion of the cost of keeping large amounts of data is in the cost of disk systems, and the resources utilized in managing the data. Backup Compression field in the database systems ha...

In this work we tackle the problem of on-line backup with a peer-to-peer approach. In contrast to current peer-to-peer architectures that build upon distributed hash-tables, we investigate whether an uncoordinated approach to data placement would prove effective in providing embedded incentives for users to offer local resources to the system. By modeling peers as selfish entities striving for ...

This paper describes archiving strategies for append-only temporal databases. We present a storage architecture where optical disks work in tandem with magnetic disks. Magnetic disks are used for storing current versions and recent past versions, whereas optical disks are dedicated for archiving older past versions. Similarly, temporal access structures are stored on both magnetic and optical d...