Various exemplary embodiments, devices, systems, and methods for sensing moisture are disclosed, including at least one moisture sensor that comprises an optical fiber, a long period grating formed in at least a portion of the optical fiber, and a layer of PEI bonded to the long period grating. The wireless communication apparatus maintains the communication speed of a communication channel when a total sum of the speed of the communication which one of the plurality of cellular phones starts and the speed of the communication previously performed is equal to or less than the communication speed of the communication channel. Heat causes the substance to transform into a gaseous state due to the transfer of thermal energy from the heat source to the substance. Through this biological action of the compounds according to the present invention, cancer cells, including metastatic cancer cells, especially prostate cancer cells can be immune regulated, resulting in the favorable therapy of cancer in a patient.