The management of virtual machine cluster (VMC) is challenging owing to the reliability requirements, such as non-stop service, failure tolerance, etc. Distributed snapshot of VMC is one promising approach to support system reliability, it allows the system administrators of data centers to recover the system from failure, and resume the execution from a intermediate state rather than the initi...

An Operational Information System (OIS) supports a real-time view of an organization’s information critical to its logistical business operations. A central component of an OIS is an engine that integrates data events captured from distributed, remote sources in order to derive meaningful real-time views of current operations. This Event Derivation Engine (EDE) continuously updates these views ...

We are seeing a growing awareness of the importance of the operator and the control room environment. Within the global process industry, five percent of annual production is lost every year due to unscheduled downtime and poor

The modifications made to a radiotherapy simulator that improve its functionality and minimize its downtime are described. Functionality was enhanced with some simple effective improvements. Decreasing the frequency and time spent on repairs reduced downtime. These "in-house" improvements were made to a Varian Ximatron simulator at the Tom Baker Cancer Center. Now there is easier access to the ...

Live migration has been proposed to reduce the downtime for migrated VMs by pre-copying the generated run-time memory state files from the original host to the migration destination host. However, if the rate for such a dirty memory generation is high, it may take a long time to accomplish live migration because a large amount of data needs to be transferred. In extreme cases when dirty memory ...

BACKGROUND Melasma is a common pigmentary disorder that remains resistant to available therapies. Facial resurfacing with the pulsed CO2 laser has been reported successful but requires significant downtime, and there is a risk of adverse sequelae. OBJECTIVE To determine if melasma will respond to a new treatment paradigm, fractional resurfacing. METHODS Ten female patients (Fitzpatrick skin...