COVID-19 is an infectious disease that has been declared a global public health emergency by the World Health Organization. Besides claiming over 3 million lives worldwide, led to unprecedented disruption in industrial productivity, trading, and food supply, resulting loss of livelihood. Despite initial success curbing spread diseases through lockdown rapid vaccine development, human are threat...

We examine the problem of building or fortifying a network to defend against enemy attacks in various scenarios. In particular, we examine the case in which an enemy can destroy any portion of any arc that a designer constructs on the network, subject to some interdiction budget. This problem takes the form of a three-level, two-player game, in which the designer acts first to construct a netwo...

We refine existing general network optimization techniques, give new characterizations for the class of problems to which they can be applied, and show that they can also be used to solve various twoplayer games in almost linear time. Among these is a new variant of the network interdiction problem, where the interdictor wants to destroy high-capacity paths from the source to the destination us...