Abstract: Provided is a method of synthesizing apatite powder by emitting a laser beam to a surface of a substrate immersed in a precursor solution. The method is including immersing a substrate in an apatite-forming precursor solution, emitting a laser beam to a region on a surface of the substrate immersed in the precursor solution, and obtaining apatite powder generated in the precursor solution.

Abstract: Disclosed is a method for detecting abusing video information in an electronic device, the method including obtaining first information associated with a user participating in a broadcast and second information associated with a content of the broadcast, determining, based on the second information and a first list of one or more types of abuse, third information about whether the second information corresponds to one of the one or more types of abuse, providing, based on the third information, a service server involved in provision of the broadcast with the first information, the second information and the third information, and providing, based on the third information, a verification server associated with user sanctions with the first information and the second information.

Abstract: Disclosed is an apparatus for effectively treating waste gases which are discharged during a processing of manufacturing semiconductors. The apparatus for treating waste gases according to an embodiment of the present invention comprises a waste gases heating chamber, a waste gases collecting chamber, a waste gases collecting chamber cover, a scraping device for the waste gases collecting chamber cover, a scraping device for the waste gases collecting chamber, and a driving source for driving the scraping device for the waste gases collecting chamber cover, and the scraping device for the waste gases collecting chamber. The apparatus for treating waste gases further includes a cooling tube which is disposed on an outer surface of the waste gases collecting chamber, for cooling waste gases.