APJ Abdul Kalam : Missile man of India

Name : Avul Pakir Jainulabdeen Abdul Kalam

Known as : Missile man of India

Birth : 15 October 1931

Invention : ballistic missile and space rocket technology

Abdul Kalam graduated in physics from St. Joseph’s College, Tiruchirapalli. After which he went to graduate with a diploma in Aeronautical Engineering in the mid-1950s from the Madras Institute of Technology. As the Project Director, he was heavily involved in the development of India’s first indigenous Satellite Launch Vehicle (SLV-II).

He was responsible for the development and operationalisation of AGNI and PRITHVI Missiles and for building indigenous capability in critical technologies through networking of multiple institutions.In his literary pursuit four of Dr. Kalam’s books – “Wings of Fire”, “India 2020 – A Vision for the New Millennium”, “My journey” and “Ignited Minds – Unleashing the power within India” have become household names in India and among the Indian nationals abroad. These books have been translated in many Indian languages.

Aryabhatta : The Indian Mathematician

Name :  Aryabhatta

Known as : Great Mathematician and astronomer

Birth : 476 A.D.

Invention : Algebra

ARYABHATTA, as written by the Arabs, ARJABAHR, a celebrated Hindu mathematician, and the earliest known author on Algebra, is now generally believed to have lived about the beginning of our era. Nothing, however, has yet appeared that can give us the slightest information as to the place of his birth, or the time when he lived; nor is there, as far as we know, any tradition or record extent from which we can collect any of the circumstances of his life;

he wrote his famous treatise the “Aryabhatta-siddhanta” but more famously the “Aryabhatiya“, the only work to have survived. It contains mathematical and astronomical theories that have been revealed to be quite accurate in modern mathematics. For instance he wrote that if 4 is added to 100 and then multiplied by 8 then added to 62,000 then divided by 20,000 the answer will be equal to the circumference of a circle of diameter twenty thousand. This calculates to 3.1416 close to the actual value Pi (3.14159). But his greatest contribution has to be zero. His other works include algebra, arithmetic, trigonometry, quadratic equations and the sine table.