Abstract: The invention relates to a system for the perception of images through touch. The inventive comprises hardware and software which enable any person with the sense of touch to perceive images, said system being intended for visually-impaired persons. The hardware comprises a peripheral which uses electromagnetic fields in order to represent forms, figures, colours or any image that can be displayed on a computer screen an hand device which enables the user to perceive signals. The software comprises a system with selects, process, encodes and transmits the images to be represented at the peripheral, enabling the user to select the area of the image to be represented, using a set of operations (including scrolling, approaching, changing definition). The system can also be used to establish a position of the plane of the image using a position sensor with constant updating.

Abstract: An improved process is provided for the preparation of activated carbon, which comprises swelling a carbonaceous material in a polar organic solvent containing an activating agent, removing the solvent, carbonizing the material, and removing the activating agent from the product. The activated carbon is produced in a short time with a high yield, and has a high surface area with a very narrow pore size distribution. Both the solvent and activating agents may be recovered and recycled.