This paper proposes novel carry select and carry look-ahead BCD adders using reversible logic. Reversible logic gates are widely known to be compatible with future computing technologies which virtually dissipate zero heat. Adders are fundamental building blocks in many computational units. For this reason, we have simulated several adder circuits using the reversible gates. Among all the other adders, the main virtue of BCD adders is that it allows easy conversion to decimal digits for printing or display and faster decimal calculations. These reversible BCD circuits are basis of the decimal ALU of primitive Quantum CPU. The proposed BCD adders have been simulated in VLSI and static timing report was analyzed.
To access information anywhere, advanced technology is needed. Nowadays mobile devices and applications are developing rapidly. Deaf and hard of hearing people find difficult to use mobile devices since they are not able to access information anywhere due to lack of services. They have difficulties with reading and writing, to read and understand all information to use mobile devices due to their hearing impairment which is an invisible disability. The gain of experience collected by deaf children in four years is equivalent to the gain of one year for hearing children. All visual textual information is not accessible for this category of people with disabilities. To provide benefits for deaf people to improve their social integration and communication. In this paper, we propose a solution to this problem by a mobile based sign language translation device for automatic translation of Indian English speech language to sign language. This helps the hearing impaired people to communicate easily with the hearing people. We focus on the relationship between deaf people and the technological progress.
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