Resonance 
journal of science education
June 2000, Volume 5, Number 6


1	Editorial     V	Rajaraman

SERIES ARTICLES
===============

8	The Study of Butterflies - The Naming of Indian Butterflies
	Peter Smetacek

15	Photodynamic Therapy (PDT) - Old and New Photosensitizers
	Bhaskar G Maiya
	
GENERAL ARTICLES
================

30	The Antiquity of Earthquakes
	Ramesh Chander and Priyamvada Singh


40	Triangularisation of a Matrix
	Rajendra Bhatia and Radha Mohan

49	Some aspects of Convexity - I
	V S Sunder

60	The Importance of Systematics
	T C Narendran

CLASSROOM
=========

69	Beauty of Entropy
	Shabnam Siddiqui

76	Torsion Pendulum Experiment at the International Physics Olympiad
	Sandeep Bala

86	Mythology in Introductory Biology
	Steven Vogel

THINK IT OVER
=============

96	Wrecked Tangles of Mats and Maths of Rectangles
	B Sury

RESEARCH NEWS
=============

97	Amartya Sen and the Mathematics of Collective Choice
	Bhaskar Dutta


INFORMATION AND ANNOUNCEMENTS
=============================

104	Refresher Course in Theoretical Physics

FRONT COVER
===========

INSAT - 2E CCD Image
Acquired on 16 April 1999.
(Photo courtesy: Dr. S Rangarajan, ISRO, Bangalore.)

BACK COVER 
===========
Karl von Linne (Carolus Linnaeus)
(1707 - 1778)
(Illustration by Prema)