pp 1-2 September 1998 Editorial

Editorial

N Mukunda

pp 2-3 September 1998 Article-in-a-Box

Emmy Noether

Mythily Ramaswamy

pp 6-13 September 1998 Series Article

Great Experiments in Physics - Discovery of Transistor Effect that Changed the Communication World

Amit Roy

pp 14-25 September 1998 General Article

Where on Earth am I? Don't Worry, GPS Satellites will Guide you - Mechanisms and Uses of GPS

Makarand Phatak

pp 26-34 September 1998 General Article

Listening to the Shape of a Drum - The Mathematics of Vibrating Drums

S Kesavan

pp 35-44 September 1998 General Article

What do Psychologists do? - Two Examples from Research in Cognitive Psychology

Kamala V Mukunda

pp 45-55 September 1998 General Article

Optoelectronic Implementation of Neural Networks - Use of Optics in Computing

R Ramachandran

pp 56-60 September 1998 General Article

Ultrasound: A Boon in the Synthesis of Organic Compounds

Vasundhara Singh Kanwal Preet Kaur Anupam Khurana G L Kad

pp 61-69 September 1998 Feature Article

Digital Watermarks - Authentication of Digital Data

H R Madhusudan

pp 70-73 September 1998 Classroom

Buffon's Needle Problem Revisited

Soubhik Chakraborty S Natarajan

pp 74-80 September 1998 Classroom

Teaching Biological Evolution Effectively

Medha S Rajadhyaksha Bakhtaver S Mahajan

pp 81-81 September 1998 Think It Over

How much can pH Change through Dilution?

Anirban Sadhu

pp 81-82 September 1998 Think It Over

Answer to Burning Question, March 1998

Vilas Gohad

pp 83-89 September 1998 Reflections

Hardy’s “A Mathematician's Apology”

L J Mordell

pp 90-92 September 1998 Information and Announcements

The National Centre for Radio Astrophysics (NCRA)

V K Kapahi

pp 92-94 September 1998 Information and Announcements

International Maths Olympiad - 1998: A Brief Report

C S Yogananda

pp 95-95 September 1998 Books Received

Books Received

pp 96-96 September 1998

Acknowledgements

pp 98-98 September 1998 Featured Scientist

Amalie Emmy Noether (1882-1935)