Viewing list of files in package in ROS

rosls is the command to view files in any package, to execute this command the syntax is

rosls <Package name>

For example

rosls roswifibot

Common Policies in Decision Making in Robots

I found out that there are four common policies in order to take a decision. (I will add more if I figured out)

1. Deliberative also called as Planner Base. (In this policy the robot has to think first , make a plan, then act)
2. Reactive Control (In this policy, the robot don’t think, it acts according to given situation)
3. Hybrid Control (In this policy the deliberative and reactive policies are combined. For high level plan we use deliberative policy and for immediate goals we use reactive policy)
4. Behaviour-Base Control (It is programming the way like we act. Here all the modules have equal priority and we can use any of the above policy depending upon the situation).

Reference: http://brown-robotics.org