An illustrative emergency-support system may include multiple unmanned aerial vehicles, which are configured to provide emergency support for a number of different emergency situations. The treatment can be remedial or prophylactic. Provision is made to permit a caller to set-up and carry out a telephone call over the Internet from telephone station to telephone station without access to computer equipment, without the necessity of maintaining a subscription to any Internet service, and without the requiring Internet literacy or knowledge. In response, the mobile subscriber identity code utilizing network elements are updated in regards to the replaced mobile subscriber identity code. The stereo-image processing apparatus includes a continuity detection unit that detects a parallax continuous region on the basis of the discontinuity of parallax values in a stereo image and a conversion processing unit that performs processing for enhancing the parallax gradient of the parallax continuous region. An intermediate for the production of an HIV protease inhibitor can be produced from L-phenylalanine.