The study of Cyber-Physical System (CPS) has been an active area of research. Internet Data Center (IDC) is an important emerging Cyber-Physical System. As the demand on Internet services drastically increases in recent years, the power used by IDCs has

been skyrocketing. While most existing

Today, there exists a wide variety of applications that the average person can use to interact with other over the Internet. However, most of the currently available applications severely lack in the areas of security and accountability. Authentication usually relies on the user sending a password

A robot must clean all corridors in a building. Assume that the robot can clean a corridor by simply traversing it and the robot always chooses to clean a corridor next to its current room that was least recently cleaned. We want to know how long (in the number of corridors traversed) will it take

Sequential simulation technique can be applied as an accurate and

inexpensive measurement approach for performance analysis of real systems.

Unfortunately, the performance of the sequential simulation degrades

when the complexity of the systems is increased. On the other hand,

parallel or

I will start by introducing the least squares (LS) problem. I will then present LSQR, an iterative algorithm that can be used to solve LS problems. I will present some surprising convergence behavior in LSQR and propose a new and improved stopping criterion for LSQR.  I will attempt to make the