27 November 2020

Started a new book…

This time it is a recommendation from Avi Basu – Steven Johnson’s “How We Got To Now”. This book focuses on six inventions and the surprising downstream long term changes they have brought – “Hummingbird Effect” – as he calls it. These are inventions that you will not come up with very quickly – glass, air conditioning etc.

And that is his point – while we easily understand the short term, immediate effect of these inventions, if you think thru it a few more steps, you will realize that the long term effects have been profound for these seemingly innocuous inventions. As an example, he cites how the printing press gave way to our understanding of the edges of the universe.

While the connection is not apparent at first, the author points out how spread of printed material made people realize they are farsighted (could not read as well the smaller scripts) which gave rise to glasses (lenses) which gave rise to microscopes on one end and telescopes on the other. Without the need to read the small print so often, we would have never stumbled upon lenses, the author argues.

Will continue to enjoy reading the book by the fire the next few evenings.

27 November 2020

Book Review: Here’s looking at Euclid

This is an absorbing book if you have any cursory interest in numbers and how they came about. Alex Bellos, a British journalist has a good story telling style and presents fairly well some of the mysteries behind numbers.

For example, did you know…
… if we did not go thru math classes, we would naturally think of numbers in logarithmic scale? We would think 1,2,3, a few, many… We understand ratios better than differences. (Remember that example from a previous post on why we would not walk 50 yards to buy a car for one buck less but will do so for a 2-buck coffee?).

… that base 10 is very inconvenient? 12 is the most convenient base (explaining 60 minutes to an hour, 12 inches to a foot…). But 10 became standard because it was easier to count with our fingers that way. Ever wondered why a finger is also called a ‘digit’?

… there are some fascinating stories about Pi. You can read about them in a prior post here

… why do we call a variable “x”? Originally we used upper case vowels for variable and consonants for constants. Descartes switched to lower case. He denoted variables from the end… “z”, “y”… and constants from the front “a”, “b”… But while publishing his book, the printer started running out of “z”s and asked if he could use “x”. (there was not much use of “x” in words). Descartes replied that he did not care. The rest became history. If not for the printer running out of letters, we could have had Z-Rays to check your chest infection today or Malcolm Z !!

… what an ambigram is? See this post on how I now have started writing my name in ambigram.

… that the largest number smaller than 1 simply does NOT exist?

… that leaves tend to sprout out at 137.5 degrees relative to the previous leaf? (if you see from the top of the shoot) This is rooted in the Golden Ratio and Fibonacci sequence. (It maximizes the sunlight the plant can get regardless of the number of leaves)

… (speaking of Fibonacci numbers)… that most flowers have petals that is a number in the Fibonacci sequence? So do the spirals in a pineapple, spruce cones, sunflowers…

This and many other fascinating facts that our teachers never used to make math really interesting to us can be found in this book. You do not need to know math to enjoy this easy reading book

Highly recommend it.

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21 November 2020

Trying out an ambigram of my name

As I mentioned last night, I learnt about “ambigram”s while reading a book by Alex Bellos. For our purpose, we can say an ambigram is a calligraphic writing such that when you hold the paper upside down, you get the same writing!

That is quite an achievement! I looked up the internet and found some free ambigram generators. I am trying to learn how to write an ambigram of my own name.

It does get your mind to think in a different way when you are practicing every stroke. Basically, you have to think how that stroke will look when you hold it upside down and is it going to build up the other letter you need to build up. (The letter that is as far from the end as is the one you are writing from the beginning). So while writing my first “R”, I have to do it in a way that if I turn it upside down, it should look like the last letter “y” and I have to draw the exact opposite of how I wrote “R” in the end to write “y”.

You will see that after half an hour of trying, my output is still amateurish. You can even spot the mistake I made in the last letter. I also realized that I need to get a thicker nib from the calligraphic pen set than I did this morning.

20 November 2020

Scripts of five different languages

After storm Zeta and learning the Greek alphabet, I had this crazy idea – albeit not too crazy as far as my ideas go – what if I tried to learn the script of another language?

I remembered, while in Mongolia, I had great difficulty reading their language. So, figured maybe I should try some language with a Cyrillic script. Settled down on Russian. The language has 33 letters and 10 vowels. Eventually got the hang of the upper case and lower case. The pronunciation was a different thing though. There are lots of sounds that are not there in English language (some are there in my mother tongue Bengali). A lot of the letters look like English but have nothing to do with the corresponding English letter. I am still struggling with the difference in pronunciation of “Й” and “ы”. All in all, was interesting to pick this up. I am going to keep trying to identify the letters in words and pronounce them thru the end of this year.

So, with English, Bengali and Hindi (based on Devnagari script), that makes it 5 different scripts for me. (I am not counting German and Spanish since they are too close to English).

Thinking of picking up one more. Tamil has a very different script. At one time, I had taught myself the script (back in 1985). Maybe I will brush that one up…