Abstract: A network quality measurement method and system are provided. In the method, a movement path and a movement speed of a vehicle device are determined according to a size of a space and an endurance time of the vehicle device, and the vehicle device is controlled to move on the movement path at the movement speed. During a movement of the vehicle device, a network quality in the space is measured according to a measurement frequency to generate network quality data. Whether the network quality in the space is changed is determined according to the network quality data. Whether there is an obstacle around the vehicle device is detected. When it is determined that the network quality in the space is changed or the obstacle is detected around the vehicle device, at least one of the movement path, the movement speed, and the measurement frequency is adjusted.

Abstract: The present invention is related to a method for storing melanocytes. The melanocytes suspension of the present invention can be stored at a temperature range from 4° C. to 22.5° C., wherein the storage temperature for baby melanocytes suspension ranges from 4° C. to 15° C. The viability of the cells after 48 hours of storage at such temperature range is at least 71% of that of the pre-stored cells. The storage temperature for adult melanocytes suspension ranges from 10° C. to 22.5° C. The viability of the cells after 24 hours of storage at such temperature range is at least 72% of that of the pre-stored cells. Meanwhile, storage of the melanocytes at such temperature range prevents the aggregation of the melanocytes. The melanocytes suspension can be used for the treatment of leukoderma as well as other conditions that result from the lack of melanocytes.