Dr Rajiv Desai
An Educational Blog
EARTHQUAKE, TSUNAMI AND NUCLEAR MELTDOWN
_ EARTHQUAKE, TSUNAMI AND NUCLEAR MELTDOWN _ Prologue: Earthquakes are among the most devastating natural disasters on the planet. A severe earthquake is one of the most frightening and destructive phenomena of nature with its terrible aftereffects. In the last hundred years they have claimed the lives of over one million people. Earthquakes are destructive mainly because of their unpredictable nature. An earthquake struck at the floor of the Pacific Ocean on 11’th March, 2011 at 14.46 JST – 38.322N 142.369E. It occurred 129 km off Sendai, Honshu (Japan) at a depth of 32 km. Its magnitude was 9 M and its duration 6 minutes. It was a Megathrust type earthquake which triggered tsunami waves of up to 97ft (29.6 meter). The tsunami waves struck inland minutes after the quake and some traveled up to 6 miles (10 km) inland. The disaster is believed to have killed more than 25,000 […]
THE SLEEP
_ THE SLEEP _ Prologue: When I was working as a medical specialist in Saudi Arabia, my duty time was 7.30 am to 5 pm and additional calls at night. If I woke up at 2 am to treat a serious patient and finished work at 3 am, technically speaking I worked 1 hour extra. My Saudi boss used to say that I can come 1 hour late next day at 8.30 am as I worked previous night for 1 hour extra. It is stupid to say the least and cruel to say the most. The issue is not 1 hour night disturbance but you do not get good sleep after being woken up at midnight and your next day is spoiled due to day-time sleepiness. I am sure that medical professionals, police, military, fire brigade etc will agree with me. Even today, I am the only physician in the […]
THE NANO WORLD
THE NANO WORLD Prologue: Can you identify what is this? A group of scientists discovered that placing gold nanoparticles within the leaves of trees causes them to give off a luminous reddish glow. The idea of using trees to replace street lights is an ingenious one – not only would it save on electricity costs and cut carbon dioxide emissions, but it could also greatly reduce light pollution in major cities. The picture speaks louder than the words. Majority people of the world know very little about nanotechnology & nanoparticles but we are ushering in an era of nano-revolution which is going to change our lives for ever. I myself was as ignorant as you on this subject until I decided to welcome the year 2011 with a novelty. Nano (symbol n) is a prefix in the metric system denoting a factor of 10 – 9 or 0.000000001. The […]
DUALITY OF EXISTENCE
DUALITY OF EXISTENCE _ Prologue: I had posted this comments on face book on 1/1/2010 as my website was not ready but the matter is so important for students that I decided to post it on my website to educate students. _ POSTULATE: Everything in universe that exists, living or non-living, has a dual mode of existence with each mode following a different set of logic/rationale to explain phenomena associated with such existence and the duality is spontaneous ,simultaneous and consistent with the existence of dual universe. _ The universe allegedly came into existence with big bang 13.7 billion years ago with the creation of matter, energy, space and time ; along with laws to regulate them. The Earth, a planet on which we live being a part of solar system with the Sun being the star; and the Sun being a part of our galaxy the Milky Way; and […]
Mathematics of Pi
Pi is defined as the ratio of the circumference of any circle to its diameter. Pi = circumference/diameter. Pi is constant irrespective of the size of the circle. Pi is classified as an irrational number. Pi denotes relationship between a straight line and a curved line of a circle. Pi = 22/7 approximately = 3.14159 approximately. I had calculated Pi way back in 1980 which I am making public today. _ The students can see that only digit 2 is used in formula where n is the maximum natural number. I will give one example. Suppose, n = 5 then, formula will calculate as follows. _ The calculator will calculate this equation as 3.140331156954 _ As n becomes greater and greater in number, Pi value will become as exact as possible. The process will go on and on indefinitely but n can never become infinity. This is a relationship between […]
