Unruled Notebook

Entries from October 2006

Impersonal

October 31, 2006 · Leave a Comment

How much of public writing can be personal?

Some years back when I wrote about somebody close to me in what I thought of as a well crafted essay, it provoked a response from one of the commenter that my writing on that occasion was very “pretentious”. Reading that comment, I was livid and very upset. In my case for instance, firstly I couldn’t believe I was pretentious. Secondly I was disturbed that some of my cherished thoughts (personal) were dubbed “pretentious” – as if, I forced myself to feel them. I couldn’t regain my poise for a long while. Eventually I removed that essay from the web.

But that is me. The creator in me is very insecure. More than that, I know I cherish my life and its (past) events and persons involved very much that I cannot allow them to be tainted by reality. May be, on that occasion I was pretentious. But I couldn’t take it for a fact or even give it a benefit of doubt. I thought I don’t have to. After all, that is what “personal” means – a highly subjective thing. Which in turn meant my personal life is not for all an sundry to judge by their subjective merit.

On the whole however, when one shares something personal with the readers or in an open forum such as a blog where the response could be immediate, one misplaced word or inadvertent remark as a response could put one off balance. Closing down the comments section in a blog is an option. For that matter, why publish the writing in the blog at all? One can keep one’s writing in one’s computer or paper. Well, then, why write it? Thoughts can remain incarcerated safely in one’s mind. The impending logical extreme step of paranoia then is to wonder why to think those thoughts at all, for the fear of being ridiculed. There you have it. A logical way to become a vegetable.

We are not vegetables however. We taste bad and we are pretentious. Further, we write to be read and that is undeniable.

Of course, on the other hand, if one doesn’t derive inspiration from one’s life, there is nothing much to write about, at least in creative fiction, narrative, asides etc. except perhaps about the telephone directory or railway time table. There should be a judicious and secure balance between deriving inspiration from life-events and sugar or spice-coating it up to cover one’s insecurities in some detached, third person perspective.

One easy way to achieve this balance is to pepper one’s writing with humour and a bit of sarcasm. Another, is to mix events randomly from different times in the past separated by years so that there is no single event or emotion or experience of the writer that can be singled out for a possible ridicule. A self-effacing writing style also helps.

Such kind of essays and stories are always an easy read. The downside is, they are seldom taken too seriously by anybody, including the writer. At the most these essays and/or stories could serve as interesting asides peppered with humour and witticisms.

And I have realized over the years, such a kind of writing gives enough vent to one’s feelings – writing as a healing activity – without causing too much damage to the World at large.

For instance, if I tell you now that there was a point to this essay when I started it, I doubt you would take me seriously…

Categories: Muse
Tagged:

Publish or Plagiarize, else Perish

October 29, 2006 · 23 Comments

This is regarding a disturbing trend that I am trying to come to terms with, in first hand. The title gives the context. Let me first describe a few instances that I had recent first hand experiences with, all involving, unfortunately, persons within our country.

Some days back my professor friend from an US university sent me an email asking me for a suggestion. One of the students of a reputed engineering institution in India has applied for summer internship to my friend’s university in the USA with a claim that he (the student) has published two research papers in ‘international conferences’ or whatever. My friend explored further on the contents of these ‘papers’ and found that they are verbatim copies of many sources including the Wikipedia. My friend sent a stern warning to the student and later consulted with me on how copyright law works in India and should he warn the institute to which the student belongs. In such instances what surprises me is the gumption on the student�s part to try her/his luck, perhaps hoping that the document would only be glanced over.

Again, a few days back, for a journal that reports peer reviewed original research articles, I was doing a technical review of a paper written by Indian authors, at the behest of the journal editor. The paper contained a report of some experiments conducted (badly) and a theory section enunciating a theoretical procedure. The paper is supposed to compare the predictions of the theory with that of some (badly performed) experimental results. To cut a long story (of me wasting two days of my life doing the review of this paper) short, the theoretical analysis reported in this manuscript is a verbatim copy of a recent work reported in a reputed journal by someone else. After I got suspicious of the content of the reported work, it took me just ten minutes to locate the real source through a search in the appropriate online journal archives.

And it didn’t end there. More than three instances involving the same authors have been identified from various journal sources, of course, with dire consequences to the authors, with all of those papers summarily rejected with a note of strong caution from the editors of the concerned journals.

And on a higher scale and stature, we know of the recent cases of the South Korean scientist faking cloning research and the eventual infamy and stripping of all of his honors, a Bell Labs Scientist trying to project something that is not true and the fusion fiasco in the USA involving, again, an Indian. A recent one to be caught is reported in the Anatomy of a scientific fraud post by Abi at nanopolitan.

And once I started discussing this issue, my colleague shared his experience of having read about another Indian scientist reproducing an old, obscure paper, and had it published in a research journal. In another instance different from plagiarism but nevertheless has questionable ethics, one has witnessed several instances when a senior faculty insists that his/her name be added as an ‘n’th author of a paper because of minor helps received by the (n-1) authors while toiling for the paper (of course, the name should, nevertheless, be certainly mentioned in the Acknowledgment).

Of course, in the above instances, justice has been done. Action has been taken against the people at fault. So no permanent harm is done. Or is it?

Why are these people copying some body else’s work?

Some ready reasons could be poor research skills, low self esteem, low regard for the entire research and publication process, peer pressure that defines academic success in a skewed way and confusion about or complete ignorance of what amounts to plagiarism.

Plagiarism involves both stealing someone else’s work and lying about it afterward and hence is an act of fraud as clearly stated by Plagiarism.org, an online site devoted to increase public awareness of plagiarism especially in academic endeavors. According to the above website, all of the following are considered plagiarism: 1) turning in someone else’s work as your own; 2) failing to put a quotation in quotation marks; 3) copying words or ideas from someone else without giving credit; 4) copying so many words or ideas from a source that it makes up the majority of your work, whether you give credit or not; 5) changing words but copying the sentence structure of a source without giving credit; 6) giving incorrect information about the source of a quotation. For instance, the ‘research paper’ instance detailed above is guilty of plagiarism under the reasons given in 1, 3, 4 and 6 above.

The logical end for academic research is usually a publication in a technical journal of repute. Although this is a much desired and a welcome result for all researchers, it is to be kept in mind as a secondary recognition. It is only a recognition of one’s work by peers (as reviewers and readers), while the much more important primary recognition of your work by your self and the associated happiness and confidence is while you did the work and there it ends.

The academic world, unfortunately, is now into the publish-or-perish mode. As a human instinct, we do not want to fail. So the weak mind succumbs to the lure. Unless this system of publish-or-perish, largely a secondary recognition activity, is rectified, we will hear more of these plagiarism stories in coming years.

A tempering option is the open source publications and open peer reviews recently tried by Nature, the science journal of repute. A radical suggestion but nevertheless one to be considered seriously is to completely abolish the importance or degree of weight given to papers published in all of the promotion qualifications of an academic scientist. This suggestion is not to be construed as one trying to stop research itself. Importance for graduating research students and successfully finishing externally funded research projects can still exist and can serve as promotion criteria. But, if one is to publish one’s research done in the above situations, then it should be out of and only for one’s personal interest.

Publishing in peer reviewed research journals is to be seen a personal academic duty of an academician, as a contribution to the growth of scientific knowledge rather as a means for (any) professional gains.

Spending enormous amount of time and earnest effort in the seeking of the primary recognition naturally yields the secondary recognition as a bonus. This is the only way one can become a successful researcher with conscience.

Further educators must take the responsibility of guiding one’s students of the perils of shortcuts to glory and about the numerous methods that exist nowadays to quickly find out about their misdeeds. After all, if a student or a fledgling researcher or academician can search the internet journal archives or Wikipedia, the editor or reviewer of a journal (who are well established scientists, in most cases) can as well do it, with much more efficiency and alacrity. In todays research world well connected by easy access of information, just as it is easy to plagiarize, it is that easy to find it. Just like there is a difference between studying and learning, students should know, else be made to realize, that there is difference between (internet) search and (academic) research.

While copying another person’s work indiscriminately (stealing!) could give one a short term success and a career, in the long term the person who resorts to this will realize (or will be made to realize) that he is a mere “hollow” moon of reflective glory, borrowing from the radiant Sun of honest creativity. An academic crook of the third degree; their soul is forever jailed inside their self constructed Hell.

To end; Think for yourself. There is much happiness in it to be explored for a life time.

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Note: The abridged version of the above article was submitted to the Open Page in a National Daily for publication consideration. It was rejected with this very informative note “Thank you for submitting an article. We regret we are unable to use it.”

I guess the above article hasn’t yet been relegated to the status of a “news item” to be published in dailies.

And some well meaning friends have goaded me to try it with other places. Again, other well meaning friends have asked me not to waste time and move on with my research. My thanks to these friends. As you can see, I seem to have taken a decision.

After reading this article, if you feel you need to do something about this, kindly link to this article if you happen to have a blog or ask one of your friends who has one to do so and make it known far and wide at least within India, to the young blog readers. My sincere thanks in advance.

UPDATE Oct 31 and Nov 06, 2006: Big Thanks to Krishnan (BlogBharti), Abi (DesiPundit), Deepak (BBGM), Geetha Krishnan (Simply Speaking), Gops (Perceptions), Srinivasa Ramanujam (link), Vijay (Scan Man’s Notes), Subrahmanya (Dr. Katte’s Blog) for spreading this message through the blogs they are associated with.

Categories: Academics
Tagged: , ,

The Richard Hamming Code for Doing Great Research

October 29, 2006 · 12 Comments

This post is a condensed “quote” version of Richard Hamming’s inspirational speech titled [ You and Your Research ], given at the Bell Communications Research Colloquium Seminar on 7 March 1986.

In other words, the quintessence of doing great (not good, but great) research is documented here. This post is long, but the transcript of the original talk (about an hour of duration) is longer. So, you may want to read this post first and then want to go over here to read more.

Let us begin with a provocative thought from Richard Hamming…

There are wavelengths that people cannot see, there are sounds that people cannot hear, and maybe computers have thoughts that people cannot think

And now from the talk:

On what he felt after his first job working closely with scientists at Los Alamos

I became very interested in the difference between > those who do and those who might have done.

On the role of Luck in research

Our society frowns on people who set out to do really good work. You’re not supposed to; luck is supposed to descend on you and you do great things by chance. Well, that’s a kind of dumb thing to say. I say, why shouldn’t you set out to do something significant. You don’t have to tell other people, but shouldn’t you say to yourself, “Yes, I would like to do something significant.”

On courage

One of the characteristics you see, and many people have it including great scientists, is that usually when they were young they had independent thoughts and had the courage to pursue them. One of the characteristics of successful scientists is having courage. Once you get your courage up and believe that you can do important problems, then you can. If you think you can’t, almost surely you are not going to.

Should good research be done (only) when one is young?

But let me say why age seems to have the effect it does. In the first place if you do some good work you will find yourself on all kinds of committees and unable to do any more work.

Perils of early recognition

When you are famous it is hard to work on small problems. This is what did Shannon in. After information theory, what do you do for an encore? The great scientists often make this error. They fail to continue to plant the little acorns from which the mighty oak trees grow. They try to get the big thing right off. And that isn’t the way things go. So that is another reason why you find that when you get early recognition it seems to sterilize you.

The Institute for Advanced Study in Princeton, in my opinion, has ruined more good scientists than any institution has created, judged by what they did before they came and judged by what they did after. Not that they weren’t good afterwards, but they were superb before they got there and were only good afterwards.

On ideal working conditions for research

What appears to be a fault, often, by a change of viewpoint, turns out to be one of the greatest assets you can have. But you are not likely to think that when you first look. So ideal working conditions are very strange. The ones you want aren’t always the best ones for you.

On having the drive to do research

Given two people of approximately the same ability and one person who works ten percent more than the other, the latter will more than twice out produce the former. The more you know, the more you learn; the more you learn, the more you can do; the more you can do, the more the opportunity – it is very much like compound interest. I don’t want to give you a rate, but it is a very high rate. Given two people with exactly the same ability, the one person who manages day in and day out to get in one more hour of thinking will be tremendously more productive over a lifetime.

On mis-applied drive

…with a little bit more work, intelligently applied is what does it. That’s the trouble; drive, misapplied, doesn’t get you anywhere. I’ve often wondered why so many of my good friends at Bell Labs who worked as hard or harder than I did, didn’t have so much to show for it. The misapplication of effort is a very serious matter. Just hard work is not enough – it must be applied sensibly.

On practicing ambiguity

There’s another trait on the side which I want to talk about; that trait is ambiguity. It took me a while to discover its importance. Most people like to believe something is or is not true. Great scientists tolerate ambiguity very well. They believe the theory enough to go ahead; they doubt it enough to notice the errors and faults so they can step forward and create the new replacement theory. If you believe too much you’ll never notice the flaws; if you doubt too much you won’t get started. It requires a lovely balance.

On concentrating on a problem without distractions

Great contributions are rarely done by adding another decimal place. It comes down to an emotional commitment. Most great scientists are completely committed to their problem. Those who don’t become committed seldom produce outstanding, first-class work.

If you are deeply immersed and committed to a topic, day after day after day, your subconscious has nothing to do but work on your problem. And so you wake up one morning, or on some afternoon, and there’s the answer. For those who don’t get committed to their current problem, the subconscious goofs off on other things and doesn’t produce the big result. So the way to manage yourself is that when you have a real important problem you don’t let anything else get the center of your attention – you keep your thoughts on the problem.

On choosing “important” problems to work on

If you do not work on an important problem, it’s unlikely you’ll do important work. It’s perfectly obvious. Great scientists have thought through, in a careful way, a number of important problems in their field, and they keep an eye on wondering how to attack them. Let me warn you, `important problem’ must be phrased carefully. The three outstanding problems in physics, in a certain sense, were never worked on while I was at Bell Labs. By important I mean guaranteed a Nobel Prize and any sum of money you want to mention. We didn’t work on (1) time travel, (2) teleportation, and (3) antigravity. They are not important problems because we do not have an attack. It’s not the consequence that makes a problem important, it is that you have a reasonable attack. That is what makes a problem important. When I say that most scientists don’t work on important problems, I mean it in that sense. The average scientist, so far as I can make out, spends almost all his time working on problems which he believes will not be important and he also doesn’t believe that they will lead to important problems.

But the average scientist does routine safe work almost all the time and so he (or she) doesn’t produce much. It’s that simple. If you want to do great work, you clearly must work on important problems, and you should have an idea.

Most great scientists know many important problems. They have something between 10 and 20 important problems for which they are looking for an attack.

The great scientists, when an opportunity opens up, get after it and they pursue it. They drop all other things. They get rid of other things and they get after an idea because they had already thought the thing through. Their minds are prepared; they see the opportunity and they go after it. Now of course lots of times it doesn’t work out, but you don’t have to hit many of them to do some great science. It’s kind of easy. One of the chief tricks is to live a long time!

On how to do research (problems)

How do I obey Newton’s rule? He said, “If I have seen further than others, it is because I’ve stood on the shoulders of giants.” These days we stand on each other’s feet!

You should do your job in such a fashion that others can build on top of it, so they will indeed say, “Yes, I’ve stood on so and so’s shoulders and I saw further.” The essence of science is cumulative. By changing a problem slightly you can often do great work rather than merely good work. Instead of attacking isolated problems, I made the resolution that I would never again solve an isolated problem except as characteristic of a class.

It is a poor workman who blames his tools – the good man gets on with the job, given what he’s got, and gets the best answer he can.

by altering the problem, by looking at the thing differently, you can make a great deal of difference in your final productivity because you can either do it in such a fashion that people can indeed build on what you’ve done, or you can do it in such a fashion that the next person has to essentially duplicate again what you’ve done. It isn’t just a matter of the job, it’s the way you write the report, the way you write the paper, the whole attitude. It’s just as easy to do a broad, general job as one very special case. And it’s much more satisfying and rewarding!

On how to sell the research work

There are three things you have to do in selling. You have to learn > to write clearly and well so that people will read it, you must learn > to give reasonably formal talks, and you also must learn to give informal talks. We had a lot of so-called `back room scientists.’ In a conference, > they would keep quiet. Three weeks later after a decision was made they > filed a report saying why you should do so and so. Well, it was too late. They would not stand up right in the middle of a hot conference, > in the middle of activity, and say, “We should do this for these reasons.” You need to master that form of communication as well as prepared speeches.

On giving an effective talk

The technical person wants to give a highly limited technical talk. Most of the time the audience wants a broad general talk and wants much more survey and background than the speaker is willing to give. As a result, many talks are ineffective.

On the nature of problems to work on and how to go about it

You’ve got to work on important problems.

I found in the early days I had believed `this’ and yet had spent all week marching in `that’ direction. It was kind of foolish. If I really believe the action is over there, why do I march in this direction? I either had to change my goal or change what I did. So I changed something I did and I marched in the direction I thought was important. It’s that easy.

Now you might tell me you haven’t got control over what you have to work on. Well, when you first begin, you may not. But once you’re moderately successful, there are more people asking for results than you can deliver and you have some power of choice, but not completely.

On why one should struggle to produce first-class research

I think it is very definitely worth the struggle to try and do first-class work because the truth is, the value is in the struggle more than it is in the result. The struggle to make something of yourself seems to be worthwhile in itself. The success and fame are sort of dividends, in my opinion.

On why even good people fail to produce great work

Why do so many of the people who have great promise, fail?

Well, one of the reasons is drive and commitment. The people who do great work with less ability but who are committed to it, get more done that those who have great skill and dabble in it, who work during the day and go home and do other things and come back and work the next day. They don’t have the deep commitment that is apparently necessary for really first-class work. They turn out lots of good work, but we were talking, remember, about first-class work. There is a difference. Good people, very talented people, almost always turn out good work. We’re talking about the outstanding work, the type of work that gets the Nobel Prize and gets recognition.

On why even good people fail to produce great work (another reason)

You find this happening again and again; good scientists will fight the system rather than learn to work with the system and take advantage of all the system has to offer. It has a lot, if you learn how to use it.

I didn’t say you should conform; I said “The appearance of conforming gets you a long way.” If you chose to assert your ego in any number of ways, “I am going to do it my way,” you pay a small steady price throughout the whole of your professional career. And this, over a whole lifetime, adds up to an enormous amount of needless trouble.

By realizing you have to use the system and studying how to get the system to do your work, you learn how to adapt the system to your desires. Or you can fight it steadily, as a small undeclared war, for the whole of your life.

On fighting the system and wasting time

people will continue to fight the system. Not that you shouldn’t occasionally!

I am not saying you shouldn’t make gestures of reform. I am saying that my study of able people is that they don’t get themselves committed to that kind of warfare. They play it a little bit and drop it and get on with their work.

Many a second-rate fellow gets caught up in some little twitting of the system, and carries it through to warfare. He expends his energy in a foolish project. Now you are going to tell me that somebody has to change the system. I agree; somebody’s has to. Which do you want to be? The person who changes the system or the person who does first-class science? Which person is it that you want to be? Be clear, when you fight the system and struggle with it, what you are doing, how far to go out of amusement, and how much to waste your effort fighting the system. My advice is to let somebody else do it and you get on with becoming a first-class scientist. Very few of you have the ability to both reform the system and become a first-class scientist.

but, at times, you should…(fight the system)

On the other hand, we can’t always give in. There are times when a certain amount of rebellion is sensible. I have observed almost all scientists enjoy a certain amount of twitting the system for the sheer love of it. What it comes down to basically is that you cannot be original in one area without having originality in others. Originality is being different. You can’t be an original scientist without having some other original characteristics. But many a scientist has let his quirks in other places make him pay a far higher price than is necessary for the ego satisfaction he or she gets. I’m not against all ego assertion; I’m against some.

On anger…

Another fault is anger. Often a scientist becomes angry, and this is no way to handle things. Amusement, yes, anger, no. Anger is misdirected. You should follow and cooperate rather than struggle against the system all the time.

On blaming it on everything else but you

Another thing you should look for is the positive side of things instead of the negative.

I often put my pride on the line and sometimes I failed, but as I said, like a cornered rat I’m surprised how often I did a good job. I think you need to learn to use yourself. I think you need to know how to convert a situation from one view to another which would increase the chance of success.

Now self-delusion in humans is very, very common. There are enumerable ways of you changing a thing and kidding yourself and making it look some other way. When you ask, “Why didn’t you do such and such,” the person has a thousand alibis. If you look at the history of science, usually these days there are 10 people right there ready, and we pay off for the person who is there first. The other nine fellows say, “Well, I had the idea but I didn’t do it and so on and so on.” There are so many alibis. Why weren’t you first? Why didn’t you do it right? Don’t try an alibi. Don’t try and kid yourself. You can tell other people all the alibis you want. I don’t mind. But to yourself try to be honest.

Summary to greatness

If you really want to be a first-class scientist you need to know yourself, your weaknesses, your strengths, and your bad faults, like my egotism. How can you convert a fault to an asset? How can you convert a situation where you haven’t got enough manpower to move into a direction when that’s exactly what you need to do? I say again that I have seen, as I studied the history, the successful scientist changed the viewpoint and what was a defect became an asset.

some of the reasons why so many people who have greatness within their grasp don’t succeed are: they don’t work on important problems, they don’t become emotionally involved, they don’t try and change what is difficult to some other situation which is easily done but is still important, and they keep giving themselves alibis why they don’t. They keep saying that it is a matter of luck. I’ve told you how easy it is; furthermore I’ve told you how to reform. Therefore, go forth and become great scientists!

Is there personal stress when we do first class research

Yes, it does. If you don’t get emotionally involved, it doesn’t. I had incipient ulcers most of the years that I was at Bell Labs. I have since gone off to the Naval Postgraduate School and laid back somewhat, and now my health is much better. But if you want to be a great scientist you’re going to have to put up with stress. You can lead a nice life; you can be a nice guy or you can be a great scientist. But nice guys end last, is what Leo Durocher said. If you want to lead a nice happy life with a lot of recreation and everything else, you’ll lead a nice life.

On brainstorming, its use and dangers

Once that was a very popular thing, but it seems not to have paid off. For myself I find it desirable to talk to other people; but a session of brainstorming is seldom worthwhile.

I picked my people carefully with whom I did or whom I didn’t brainstorm because the sound absorbers are a curse. They are just nice guys; they fill the whole space and they contribute nothing except they absorb ideas and the new ideas just die away instead of echoing on. Yes, I find it necessary to talk to people. I think people with closed doors fail to do this so they fail to get their ideas sharpened, such as “Did you ever notice something over here?” I never knew anything about it – I can go over and look. Somebody points the way. On my visit here, I have already found several books that I must read when I get home. I talk to people and ask questions when I think they can answer me and give me clues that I do not know about. I go out and look!

On allocating one’s time between actually doing the work and talking about it

I believed, in my early days, that you should spend at least as much time in the polish and presentation as you did in the original research. Now at least 50% of the time must go for the presentation.

On how to read and use library to do great research

If you read all the time what other people have done you will think the way they thought. If you want to think new thoughts that are different, then do what a lot of creative people do – get the problem reasonably clear and then refuse to look at any answers until you’ve thought the problem through carefully how you would do it, how you could slightly change the problem to be the correct one. So yes, you need to keep up. You need to keep up more to find out what the problems are than to read to find the solutions. The reading is necessary to know what is going on and what is possible. But reading to get the solutions does not seem to be the way to do great research. So I’ll give you two answers. You read; but it is not the amount, it is the way you read that counts.

On true greatness

true greatness is when your name is like ampere, watt, and fourier – when it’s spelled with a lower case letter.

On the relative effectiveness of papers and books

In the short-haul, papers are very important if you want to stimulate someone tomorrow. If you want to get recognition long-haul, it seems to me writing books is more contribution because most of us need orientation.

in the long-haul, books which leave out what’s not essential are more important than books which tell you everything because you don’t want to know everything. I don’t want to know that much about penguins is the usual reply. You just want to know the essence.

On the necessity to change fields periodically to stay competent

Somewhere around every seven years make a significant, if not complete, shift in your field.

Then you go to a new field, you have to start over as a baby. You are no longer the big mukity muk and you can start back there and you can start planting those acorns which will become the giant oaks.

You have to change. You get tired after a while; you use up your originality in one field. You need to get something nearby. I’m not saying that you shift from music to theoretical physics to English literature; I mean within your field you should shift areas so that you don’t go stale. You couldn’t get away with forcing a change every seven years, but if you could, I would require a condition for doing research, being that you will change your field of research every seven years with a reasonable definition of what it means, or at the end of 10 years, management has the right to compel you to change. I would insist on a change because I’m serious. What happens to the old fellows is that they get a technique going; they keep on using it. They were marching in that direction which was right then, but the world changes. There’s the new direction; but the old fellows are still marching in their former direction.

You need to get into a new field to get new viewpoints, and before you use up all the old ones. You can do something about this, but it takes effort and energy. It takes courage to say, “Yes, I will give up my great reputation.” For example, when error correcting codes were well launched, having these theories, I said, “Hamming, you are going to quit reading papers in the field; you are going to ignore it completely; you are going to try and do something else other than coast on that.” I deliberately refused to go on in that field.

On research and management and how to choose between them

If you want to be a great researcher, you won’t make it being president of the company. If you want to be president of the company, that’s another thing. I’m not against being president of the company. I just don’t want to be.

I’m not against it; but you have to be clear on what you want. Furthermore, when you’re young, you may have picked wanting to be a great scientist, but as you live longer, you may change your mind.

When your vision of what you want to do is what you can do single-handedly, then you should pursue it. The day your vision, what you think needs to be done, is bigger than what you can do single-handedly, then you have to move toward management. And the bigger the vision is, the farther in management you have to go.

It depends upon what goals and what desires you have. And as they change in life, you have to be prepared to change. I chose to avoid management because I preferred to do what I could do single-handedly. But that’s the choice that I made, and it is biased. Each person is entitled to their choice. Keep an open mind. But when you do choose a path, for heaven’s sake be aware of what you have done and the choice you have made. Don’t try to do both sides.

On the importance of having good people around you

At Bell Labs everyone expected good work from me – it was a big help. Everybody expects you to do a good job, so you do, if you’ve got pride. I think it’s very valuable to have first-class people around. I sought out the best people.

I tried to go with people who had great ability so I could learn from them and who would expect great results out of me. By deliberately managing myself, I think I did much better than laissez faire.

That is a summary of advice on not just how to conduct oneself to produce great research, according to me, it is also an advice on how to just conduct oneself (in life)…

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Categories: Academics

Take My World-View Quiz

October 25, 2006 · 10 Comments

As explained in the previous post, I took the World View Quiz to check for where I stand with my rational outlook. I seem to have fared well, standing just below Carl Sagan, one of my heroes. After taking that quiz, I felt it had a definite tilt towards Biological Sciences and Theology, which could be intentional as some of the present World (meaning USA, as always) issues revolve around those subjects. Nothing wrong, just that to check for my rationality, more ways exist. For instance, here are ten questions that I cooked up in a few minutes to check for our rationality using other sciences and abuses. Take it for the fun of it. And no cheating. Don’t scroll down to look for the answers before trying. Thanks…

I believe in 1 + 1 = 2

  1. by faith
  2. by logic
  3. by a bit of both faith and logic
  4. because every other person seems to believe in it

Theory of Relativity

  1. proves everything in this world including point of views, is only relative
  2. sets a limit for the maximum speed of material objects
  3. is useless in daily life, hence unnecessary for a rational world
  4. suggests Devas, Gods and Aliens travel at the speed of light

When encountered with a revolving door

  1. one should always use the left side door
  2. one should always use the right side door
  3. any door is fine as long as two of us don’t disagree on which side, while entering
  4. one should always close it after use

“Absence of Evidence doesn’t mean Evidence of Absence”; this means

  1. nothing can be proved or disproved
  2. you are confused
  3. an hypotheses can survive without factual evidence, if it is based on accepted knowledge
  4. all of the above

Quantum Mechanics

  1. is nothing but the Dwaitha philosophy popular in Ancient India
  2. is just the other word for “observer is part of the observed”
  3. doesn’t explain why and how gravity works
  4. is fundamentally misguided and not necessary for a rational world

Ghosts

  1. are scientifically unproven gobbledygook
  2. meet with me sometimes, but I cannot prove it in any testable fashion to anybody else
  3. are our own shadows living in parallel universes; for them, we are their shadows
  4. may or may not exist; i reserve judgment until I die

I believe in Newton’s Laws because

  1. I have tested them to be true
  2. my teacher, an authority in mechanics, asked me to believe it
  3. one cannot touch without a touch
  4. sorry, I don’t believe in it. I am a sociology major…

Mahatma Gandhi

  1. certainly existed because I have met people who told me they have met him in person
  2. based on the suggestive evidences given to me, could have existed in the past, but I have not bothered to check all of these evidences because of lack of time
  3. may or may not have existed, but only the ideas circulating presently in his name matter
  4. didn’t exist. All suggestive evidence is like the one given for the Theory of Evolution and I don’t believe in it

Mankind is bound to suffer

  1. if we practice rationality as a choice
  2. because most of us are idiots most of the times
  3. because you are a male chauvinist moron
  4. until we invent a pill for the remedy

Name a man eating dinosaur

  1. Tyranosaurus Rex
  2. Stegosaurus
  3. Ask Calvin
  4. None of the above

Thanks for taking the quiz.

Now for the answers

If you have chosen 4 for all of the above ten questions, you probably are practicing irrationality by choice or somebody who know me well.

If, on the other hand, it is a mixed bag of answers, well, you know a rational person would always know he/she is rational…

Feedback: Do let me know in the comments section, of how to improve this quiz to find out who we really are… ;)

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Categories: Micro Muse
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Flow Through Porous Media Summary

October 23, 2006 · 16 Comments

Given below is a schematic for the evolution of the conceptual development of the momentum conservation statement for flow through porous media. The filter-like picture shown in the schemtaic represents the filtration experiments carried out by Henry Philibert Gaspard Darcy in Dijon, France in the middle of the 19th century, when he was working there as the “Dean of the School of Bridges and Roadways”.

The evolution essentially traces only the concepts originated through experiments, in other words, the modeling of flow through porous media done at the global scale (to put it crudely, what is seen in the resolution level of the human eye).

pm_flow_summary_4.jpg

Figure 1: Evolution of Global Flow Modeling in Porous Media

The above schematic doesn’t give a complete picture of the modeling challenges involved in the differential scale or the macroscopic or pore level modeling of the porous medium. Also, the schematic captures only the evolution of the global momentum conservation statement for a particular restricted class of porous media. This is partly due to the nature of the earlier experiments done (in the 19th and early 20th centuries) to understand the flow through porous media, which involved mostly low permeable media.

Ideally, if one were to perform a volume integration of the equation shown inside the orange box of Fig. 1, it should lead to a result similar to that of the, experimentally verifiable, global momentum conservation equation inside the yellow box, just above the orange box. A more general representation of the macroscopic model (equation inside the orange box in Fig. 1) is given in Fig. 2 below.

The following schematic is a general steady state differential momentum conservation statement valid on a ‘porous-continuum’, a continuous space whose differential ‘point’ is in principle equivalent to a [[Representative Elemental Volume (REV)|PM Homogeneity and REV]] of the actual porous medium, which is being modeled.

   0 = -\nabla {\phi p^,} + \mu_{eff}\nabla^2u^, - \frac {\mu}{K}\phi u^, - \rho C \phi^2|u^,|u^,  \cdots (2)

The    \phi in the equation represents the volumetric porosity of the porous medium (total pore volume divided by the total volume of the porous medium);    p^, and    u^, (vector) are the static pressure and velocity in the pore level,    \mu_{eff} is the effective viscosity, a quantity believed to be a function of the porous medium. The    \mu and    \rho are the dynamic viscosity and density of the fluid that flow through the porous medium while    K and    C are the Permeability (    m^2 ) and Form Coefficient](    m^{-1} ), hydraulic properties of the porous medium.

The extensive experiments and testing of low permeable media and the eventual form of the global momentum conservation (equations in yellow boxes in Fig. 1) perhaps have lead some fluid mechanist (mostly experimentalists) to believe that there is NO turbulence in porous media flows because, the smallness of the pores (an artifact of low permeable media) cannot sustain the cascading nature of flows in several scales, a signature of turbulence. This view is not true, and turbulence in porous media is one of the ‘hot fields’ of current porous medium research. But to discuss that will take a separate post.

Some more references of interest

  • Darcy, H. P. G., 1856, Les Fontaines Publiques de la Ville de Dijon, Victor Dalmont, Paris. [ take a look at the English translation of the paper; the crucial data from Appendix D in Excel format of the above paper that led to the Darcy Law; Courtesy: an excellent page on Darcy maintained by Prof. Glenn Brown ]
  • Dupuit, A. J. E. J., 1863, etudes Theoriques et Pratiques sur le Mouvement des aux dans les Canaux Decouverts et a Travers les Terrains Permeables, Victor Dalmont, Paris.
  • Forchheimer, P., 1901, Wasserbewegung durch Boden, Zeitschrift des Vereines Deutscher Ingenieure, Vol. 45, pp. 1736-1741 and pp. 1781-1788.
  • Hazen, A, 1893, “Some Physical Properties of Sand and Gravels with Special Reference to their use in Filtration,” Twenty-fourth Annual Report, Massachusetts State Board of Health, p. 541.
  • Newton, Sir. I., 1687 (First ed., 1713, Second ed. and 1726, Third ed.), Philosophiae Naturalis Principia Mathematica. 1) translated by A. Motte, Prometheus Books, New York, 1995; originally published as: Newton’s Principia. First American ed., New York, 1848. 2) Cajori, F., Newton’s Principia (Motte’s translation revised). Uty. of Cal. press, Berkeley, CA, 1946.
  • Stanek, V. and Szekely, J., 1974, “Three-dimensional flow of fluids through nonuniform packed beds,” AIChE Journal, Vol. 20, pp. 974-980.

A good starting point for getting a historical perspective of flow through porous media would be

  • Lage, J. L., 1998, “The Fundamental Theory of Flow through Permeable Media: from Darcy to Turbulence,” Transport Phenomena in Porous Media, D. B. Ingham and I. Pop, Eds., Pergamon, New York, pp. 1-30.

Categories: Porous Medium · Research Notes
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