One hundred and forty-four years elapsed between the publication of Copernicus’s De Revolutionibus, which opened the great scientific revolution of the XVII century, and the publication of Newton’s Principia, the final synthesis that brought that revolution to a spectacularly successful end. During those hundred and forty-four years, the basic grammar for understanding the physical world change...

OUTLINE 1. What is information revolution? 2. What are the advantages of information in electronic form? 3. What is hyper-text? 4. Where are Indian languages in the information revolution? 4.1 Digital content 4.2 Machine translation 4.3 Speech 4.4 Optical character recognition 4.5 Search and knowledge organization 4.6 Other applications 5. Relevant technologies 5.1 Basic research 6. Are compute...

In this paper, we construct surfaces of revolution with constant mean curvature H = c and minimal surfaces of revolution in hyperbolic 3-space H(−c) of constant sectional curvature −c. It is shown that surfaces of revolution with constant mean curvature H = c in H(−c) tend toward the catenoid, the minimal surface of revolution in Euclidean 3-space E as c → 0. Minimal surfaces of revolution in H...