A method of depositing a coating layer comprising gallium nitride on a substrate comprising the steps of: (a) providing the substance having a plurality of side walls and valleys; (b) forming a first layer of gallium nitride deposited on the…

The device BFP is specially designed for the visual impaired people who are novice of braille learners or never have had any exposure to braille language. BFP is to assist or teach the beginners of visual impaired to comprehend the arrangement of…