A monolithic white light-emitting diode (LED) with blue and yellow light active regions has been designed
and studied. With the Al<sub>x</sub>Ga<sub>1-x</sub>N / In<sub>y</sub>Ga<sub>1-y</sub>N distributed Bragg reflector (DBR) resonant-cavity, the extraction efficiency and
power of the yellow light are enhanced so that high quality white light can be obtained.
In the recent past, wireless sensor networks have found their way into a wide variety of applications and systems with
vastly varying requirements and characteristics. The major limit to the sensor nodes is the limit of energy and computing
capability. The major consumption of the nodes energy in sensor networks occurs in the communication between nodes
or between the nodes and the base station. Many current protocols only pay attention to how to reduce the energy
consumption, rather than the stability during the routing process. Aimed to solve this problem, the paper produces a new
kind of reliable and energy-efficient wave routing algorithm. The results of the experimentation can indicate that this new
algorithm can not only reduce the energy consumption, but also ensure the stability of the routing.