All Toothed Whales have at least one dorsal fin. Both of these types of whales were once widely hunted for a variety of reasons. The Baleen Whales seemed to be hunted on a larger scale. First, they were less dangerous so the risk involved was reduced.Second, their oils were used for cooking, to make clothing, and for other resources.ll Toothed Whales have at least one dorsal fin. Both of these types of whales were once widely hunted for a variety of reasons. The Baleen Whales seemed to be hunted on a larger scale. First, they were less dangerous so the risk involved was reduced.
We need robots to help humanity bear the challenges of today and tomorrow As we have seen in the previous two part of this series, robots will help us cope with the demography burden all countries will face after they complete their demographic transition.
They can move, sense their surroundings, and respond to changes in the environment. Many robots are mechanical arms attached to a base. Robotic arms use flexible joints to perform tasks that require very precise movements. A robotâs degree of freedom is its ability to move in a particular direction. Most robots have at least six degrees of freedom and can have many more. The space within which a robotic arm can move is called its work envelope. The size and shape of the work envelope is determined by the size of the robot and its degrees of freedom. Some robots are independent and can be controlled by a computer and wireless radio.