A method of adding refrigerant to an air conditioning system. When a client submits a registration request, the registration-controlling unit registers the identification code of the client and the current access time in the registration table. The heat control unit may be replaced with a broiling pan or frying pan, if desired. The retrieved heterogeneous interrelated entities are searched in a unified matrix that represents relationships between one or more heterogeneous entities. A reconstruction processor reconstructs the generated imaging data into a reconstructed image substantially free of ghosting. Embodiments of the invention also include method of making and using the clathrate compound.