UPSC Essentials brings to you its initiative of subject-wise quizzes. These quizzes are designed to help you revise some of the most important topics from the static part of the syllabus. Attempt ...

This paper presents an X-band frequency-reconfigurable antenna fabricated by 4D printing technology. NiTi shape memory alloy radiating units in the proposed antenna exhibit dimensional changes in ...

4D printing introduces the "time dimension" based on 3D printing, enabling printed structures to undergo controllable dynamic changes in shape, properties, or functions under external stimuli such as ...