Monday, September 02, 2019

Rustum




My introduction to Rustum was dramatic.



The day after the Patels had moved in to the first floor of our walk-up Apartment block( we occupied the flat on the second floor directly above), my wife and I were standing at the door of our flat bidding good-bye to departing guests when a half-grown cat confidently walked up the stairs, squeezed past my wife and the door frame, walked into our drawing room and hid behind the sofa.Bewildered, we tried to look at our unexpected guest, but if a small cat decides to hide that is not so easy as it sounds.In a short while we heard a shout of “Rustum” and Mr. Patel walked up.In a flah the cat jumped into his arms.



I looked at the cat.He looked at me with a steady, unblinkig gaze that bespoke equanimity and self-cofidence in equal measure. I was reminded of Kipling’s tale of “The Cat that Walked by Hinself.”Apparently that fictional character was Rustum’s feline ancestor.



Mr.Patel felt he owed me an explanation.



“I think he was confused.He is new here, you see.”

“So this is your cat.”

Mr. Patel was a trifle embarrassed by this somewhat accusing statement.He explined his cat.



The Patels had lived in another part of Kolkata as tenants. The previous year, a stray cat had littered under a tree growing in ther back yard.As cats do, the mother moved the kittens every day by picking them up one by one in her mouth and changing the hideaway. One night she was interrupted by stray dogs, and this one was left behind. Mrs.Patel picked up the tiny animal and brought it in, to save it from the dogs.From that day the cat became a pet of the Patels.



Or maybe, the cat chose the Patels to be his protectors. Because you know the saying,”Take dog,care for him and feed him; he thinks you are God. Take a cat,care for him and feed him, he thimks he is God.” I don’t know about the divine element, but there was something incrediblyely majestic and inperious about this little creature, who weighed a couple of kilograms at the most.I think the Patel kids recognized this when they had named him “Rustm”.



Rustum never used the door to our flat again, but he would walk in to our drawing room from time to time all the same.His pathway was a flowering creeper which ran along the line of our drawing room windows.A creature as small as him easily squeezed through the windo grill, and he climbed along the slender creeper with the nonchalnce of a skilled acrobat.And into our drawing room through the grill on our open window. This way, closed doors were irrelevent. After a few days he grew tired of this; maybe our reception to him was distinctly cold.So he took to jumping a few feet from the creeper to land on the concrete window sunshade, fifteen inches wide and fifteen feet from the ground,That is where he loved to bask in the sun.Later he took to jumping from sun-shade to sun-shade so we could see him all around the flat.And he never failed to make it safely back.



A few months after our first encounter,while walking up to my flat I saw Rustum intensely absorbed in something just outside the Patel’s front door. The Patel’s front door was closed, but as I have already explained, this was a matter of no impediment to Rustum’s activities.He had cornered a little field lizard, not the familiar gecko on our walls but of the type found in the scrub , and was examining it intently.Any attempt made by the lizard to move would be countered by a firm paw on its tail. The classic cat-and mouse game, played with a lizard.Fearing bloodshed in my Apartment Block.I shooed Rustum away.He withdrew,with the hauteur and condescension of a pre-Revlutionary French nobleman interrupted in his sport.



I picked the lizard up in my hands.This tiny creature, who had just experienced the exchange of a pedator sixty times his weight by one who outweighed him a thousand times was terrified; his heart was beating against my fingers two hundred times a minute, I walkde down the stairs and gently released him among the bushes.He scampered away.



Early spring came around.This is the season where many deciduous trees shed all their leaves, only to cover themselves in a fresh and luxurious grreen growh a few days later.The sheesham tree in our front yard was now bare, and a pair of crows had built a nest in its branches,working to raise a crop of young ones soon from the eggs that had been laid.One morning I heard a raucuous clamour from the tree.Looking out, I saw Rustum calmly sitting in the nest, completely unfazed by the desperate crows who subjected him to aerial buzzing.What had happened to the eggs?Rustum was not a vegearian.



I looked at the scene in disbelief. The trunk expanded into branches ten feet above the ground.Rustum had made his way to this height by climbing these ten feet by holding on to the near-vertical, rough trunk with his prehensile claws.What attraced him to the crows’ nest I do not know, but all cats are hunters.He saw the crows as fair game,identified the nest as a target, and there he was.For me the qustion was: he had climbed up all tight, but how was he going to get back?



But get back he did.I had not witnessed his ascent, and did not see his descent either.But when I returned in the afternoon Rustum was back in his familair haunts, as confident as before.None of this”Kitten stuck in trees rescued by Fire Brigade” headlines for him.He was Rustum.



A few weeks later I swa Rustum in an entirely new light. He had company of a tabby about his own size and age. If ever a pair of teenage lovers had eyes only for each other, this was it.They frisked,gambolled and preened in each other’s company.When the walked into the bushes, I discreetly withdrew.Even cats need privacy.



Events like this rarely have a happy ending.One day I met Mr.Patel.I enquired afte Rustum whom I had not seen for a few days.Mr.Patel told me the pitiful story.



Rustum had not returned home three nights ago.This was the first time he had stayed out, and a somewhat anxious Mr. Patel had set out next mornig to look for him. He had not far to look.Half a mile away he saw Rustum’s lifeless body flung into the bushes with a string around his neck. Lulled by an unjustified trust in human beings that was a result of his stay with the Patels,he had obviuously invaded someone’s household.The householder, with the savagery that we human feel for weak and unruly creatures who dare to cross our paths , had caught him, hanged him and disdainfully flung his body out to rot. Mr.Patel carefully buried Rustum’s body.



Is this the end of the chapter?I hope not.Remebring his dalliance, I like to think that Rustum has left his genes behind; the ones that typify the fearless nature of cats.If in the midst of life we are surrounded by death, so also in the midst of death we see the evidence of life.This is nature.This is the way of the world.






















Friday, August 31, 2018

Dr. R.G.Chatterji

I have written earlier about Dr. R. G.Chatterji, whose manuscripts of tutorial notes fromed the basis of my two books on IIT JEE Physics. I have also commented that he was loved by all his students.
While clearing out old papers I came across an old testimonial by the students of R.K.Hall.IIT Kharagpur, nominating him as the Best Teacher of the Year in 1961.
An appreciation by one's students is something that cannot be bought , is, valuable in its own right, and is a true measure of the man.

Monday, April 02, 2018

Basic Maths



Continuing where I left off, here is a resource in the form of a summary of important maths concepts,principles and methods that is likely to be useful to those interested in following my video lectures on Higher Secondary Physics.




https://drive.google.com/open?id=1Qn7_aPY8vj15yAnqTIl8MENqVeiTRx_H 

Wednesday, January 04, 2017

Volume II Published


Release of Volume II

Volume II of my book,”IIT JEE Physics,Problems and Solutions” , published by Notion Press has just been released. This covers the topics I described earlier, viz. electricity, magnetism,  sound,light and modern physics. It has solutions to 450 problems from Irodov's book, and another 85 problems besides.100 pages of notes are included. Together with volume I (already published) covering statics, dynamics, thermodynamics  and liquids, and containing solutions to another 400 problems from Irodov and 30 other problems, along with another 100 pages of notes, the two volumes together present a comprehensive and excellent resource for higher secondary students preparing for the IIT Joint Entrance test in Physics. 
 

Volume I itself has entered its second edition; the principal change being a rearrangement of the layout that allowed an increase in font size of the mathematical expressions to improve reader experience, and the addition of Notes and worked-out problems on heat transfer.

My publisher has arranged an author page for me at https://notionpress.com/author/g_ganguli.This is a gateway to multiple on-line book-stores. If you have purchased either volume, please leave a review at the Amazon platform.

With this, the compilation and publication of the late Dr. R.G.Chatterji's papers is complete. It has been an eventful eighteen months since I decided to take up this task , based on my conviction that this would make available a significant resource of incredibly high quality to students preparing for the IIT JEE examinations; and that this was the best way to honor the legacy of this remarkable teacher.

Arranging,formally presenting and double-checking the solutions scattered among several manuscripts was an onerous task. This was possible because I have experience in the matter, having coached Higher Secondary school students for the IIT JEE Physics paper in the past before the demands of Corporate life intervened. My wife patiently bore the many hours I literally tore off from family time and lavished on the project. Thank you, Indrani.

The final issue was the publication itself. Kolkata, the city where I live, has a robust publishing industry, but no one was interested in backing an unknown author in a specialized genre. Fortunately I was able to contact Notion Press, Chennai who have been very professional and very helpful in the way they handled the publications.

The A4 size selected for the book made both volumes easy to convert to an e-book format . Also, the books themselves are compact and easy to handle.

The quality of what has been produced fills me with satisfaction. The time and effort spent has been huge but something of real value has been produced.

A few pointers.

There are other books available on this topic. Two things make these volumes stand out.

First,the method. There are always more ways than one to solve a problem. Dr. Chatterji was a born teacher and always addressed the needs of his students. He chose methods that were simple and intuitive , and he seldom used mathematics beyond the Higher Secondary level. Where there was simply no other option,he explained the particular concept in very simple and useful terms in his notes.

Second, the notes. When he taught, he would devote a fair amount of time to review, distill and encapsulate the necessary physics and maths theory and present it as notes for the students in a manner that was concise,accurate, yet easily retained ; because these concepts,results and expressions are vitally necessary for problem-solving at this level. In these volumes as many as 200 of the 900 pages or so are devoted to notes, making them quite unique.

I personally believe that the notes presented in the books are extremely important and well worth the study, and will repay the student many times over for his or her effort to master them.

How to use these books.

If you are a student, and want to prepare for the IIT JEE Physics paper, it is possible to do so using these books. Start by asking yourself the following questions :

1. At the start of Class X, would you ( and your teachers and class-mates) say you are quite good in Maths and Science?

2.Do you really have the ambition to enter IIT and the capacity and willingness to work very hard for this goal?

The answer to both questions must be a resounding “yes.” Because, let's face it, you will have to invest a considerable amount of your time and effort for this. There is no short-cut. Be certain of your motivation before you start the journey.

The books have been designed for self-study; as work-books rather than books of reference. They must be complemented by a copy of “Problems in General Physics” by A.E.Irodov, available as a free download from 
https://archive.org/details/IrodovProblemsInGeneralPhysics or an inexpensive hard copy from an on-line store. This renowned publication of international acclaim, now in the public domain, is widely considered to be the very best question bank of problems in Physics available anywhere. It is particularly suitable for preparing for the IIT JEE Physics paper, and is the source of 850 of the 1000 problems to which solutions are presented. Any higher secondary school student who is able to independently solve most of the problems in the books will be in an excellent position to tackle the tough IIT JEE Physics paper. The concepts and expressions are readily available in the Notes- but of course, for a deeper treatment of the theory you will have to consult your favorite Physics text book.

The preparation is thus simple in principle. Start with the problems,not the solutions. Work out each problem with pen and paper in sequence, starting with the beginning of Volume I and ending with the end of Volume II. Check your work with the solutions provided. Refer to the notes and use them frequently,

This is not as difficult as it sounds. The greatest help you can give yourself is to form a study-group of 4-8 motivated and serious students . Meeting once a week for two hours,and sharing the work-load, the group can present solutions to 12-16 problems on the black-board to each other and answer questions from the others on the presentation. Home-work for 4 hours a week will be necessary , working out these problems with pen and paper and then checking the answers using the solutions provided. Thus through a study of 6 hrs per week over one and a half years the entire material can be meaningfully covered and assimilated. The compact solutions and the encapsulated notes make this eminently doable.

Although the solutions are self-explanatory, during the preparation of a subject like this, questions will inevitably arise. It is here that each group will benefit immensely by the presence of a mentor. I hope Higher Secondary Physics teachers will be motivated to help talented students fulfill their IIT dreams and set up study groups in their locality. I shall try to support such initiatives by teachers and groups, wherever they are,whatever their size,if they get in touch with me, in whatever way I can. Those interested can leave a comment on my blog.

The future
I would like to set up a web site so that any questions on any part of the content in these books can be asked and answered on line. The idea is to give more control to each reader to learn at his or her own pace. This is an ambitious project; one that is not going to happen any time soon. But it can be done. I invite anyone with a constructive idea about it to leave a comment in this blog.













Saturday, May 07, 2016

Progress in Volume II

As promised, work on Volume II is well under way. I estimate that about a third of the book is done; I hope to publish it by the end of the year.
The format it follows is the same: notes on theory, followed by solutions to problems contained in Irodov's book:"Problems in General Physics." And finally, problems from elsewhere. As before, the use of diagrams is lavish; and the formatting has improved a bit, owing to feedbacks received from users of Volume I.
Here is a screenshot of a page:

Thursday, May 05, 2016

Book Promotion

As part of a promotional initiative accompanying the launch of a new book, Notion Press has given me a stack of 50% discount coupons which I intend to mail (one per head)to those who ask for it.So if you want to get a hefty discount on this book, please email me your request with your name,postal address (where I shall mail the coupon) and the name of the school to which you are attached as student or teacher at gautam.ganguli@gmail.com. Needless to say, offer open while stocks of coupons last.

Wednesday, April 06, 2016

Book Published

My book,"IIT JEE Physics Problems and Solutions, Volume I" is finally out in print. It is compact, well-produced, and a joy to handle and read.Thank you, Notion Press!
The best place to purchase the book is at https://notionpress.com/read/iit-jee-physics-problems-and-solutions-volume-i.This is a gateway to multiple sales platforms including Amazon.And if you have purchased a book, please leave a review at the appropriate place in the platform.

If you are satisfied, please tell others.If you are dissatisfied, do tell me.
My email: gautam.ganguli@gmail.com.

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-Steel plant technologist -Construction engineer. -Contracts Manager -Technical editor. -(Occasional )java programmer. -Physics teacher -Author -And now, doting grandfather.