We present an innovative backup and restore solution, called LifeBoat, for Windows machines. Our solution provides for local and remote backups and ‘‘bare metal’’ restores. Classic backup systems do a file system backup and require the machine to be installed before the system can be restored or they do a block for block backup of the system image which allows for a ‘‘bare metal’’ restore, but ...

lost through user error, software or media failure, or site disaster but are unwilling to devote system resources or downtime to make backup copies of the data. Furthermore, with the rapid growth in the use of data storage and the tendency to move systems toward complete utilization (i.e., 24-hour by 7-day operation), the practice of taking the system off line to back up data is no longer feasi...

  We consider the maximal covering location-allocation problem with multiple servers. The objective is to maximize the population covered, subject to constraints on the number of service centers, total number of servers in all centers, and the average waiting time at each center. Each center operates as an M/M/k queuing system with variable number of servers. The total costs of establishing cen...

With the advent of computerized data acquisition in spectroscopy, it has become possible to acquire large quantities of data with relative ease. Without a convenient method for archiving and accessing the data at a later date, a number of the capabilities inherent in these systems are unrealized. We have developed a generalized archival system which automatically archives all raw data and gener...

NRG performed a research project on the influence on safety of diverse backup systems next to the existing digital I&C safety systems in Nuclear Power Plants (NPPs). As part of this research project a probabilistic approach has been used to evaluate the basic options to connect a diverse backup system logically to the existing digital I&C systems. One can distinguish four different basic design...

We consider definably compact groups in an o-minimal expansion of a real closed field. It is known that to each such group G is associated a natural exact sequence 1→ G00 → G → G/G00 → 1 where G00 is the “infinitesimal subgroup” of G and G/G00 is a compact real Lie group. We show that given a connected open subset U of G/G00 there is a canonical isomorphism between the fundamental group of U an...