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 ...
UPSC NDA 2026: The Union Public Service Commission (UPSC) has released the NATIONAL DEFENCE ACADEMY (NDA) and NAVAL ACADEMY (NA) EXAMINATION (I) 2026 notification. Online applications are open from ...
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 ...
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