A method and apparatus of obtaining a spectral image of a plurality of predetermined chemical species. This element interacts with a second magnetic or magnetizable element arranged behind the ear or, respectively, implanted in the ear, so that the force of attraction of the two magnetic or magnetizable elements provides an additional holding and fixing of the hearing aid or the otoplastic, respectively, in the ear. The user PC 1600 will then play the information and, upon playing the information, embedded information within the audio file will be detected by an application program 1604. The shoe could carry out circulation of air between interior and exterior of shoe for air purification and always keeping a dry and ventilating environment within the shoe. Such a network of nodes can be organized according into resource nodes, domain nodes, and service nodes, with paths from the domain nodes, through the service nodes, to the resource nodes being used in the allocation. The mineral-protein preparation showed a hypoglycemia effect and stopped the development and progressing of the diabetic neuropathy.