latest instance of RAM

Yeah.. here I am, giving latest and bit simpler instance of my RAM.

PS: It is advisable to at least get my interpretation of  RAM from linked post. At the same time it is not advisable  to read it complete, if you want to remain in state to read this one complete :D


So here it goes..

Well, Some months back, may be around 6... I don't remember exactly. We ended on some calculations, in particular covariances, some big matrix kind stuff. I invested a week or so in it. And it was not only in hand-written notes, but I also made the complete Latex document. And that document even went through some 2-3 revisions by MBR. But somehow, we had to drop that strategy at that moment and moved to some new line of action.

Now when 3 days back, we again decided to move to previous strategy. That meant we need those calculations. And in obvious manner he remarked, "We already have them". And this silly-idiot-stupid-me VERY confidently kept on pleading that "No, it hasn't been done yet", or "I don't remeber doing any such thing"... and what not. And today morning when I started re-doing the stuff, I realised... Ohhh!! looks like has been done some time. Is it Deja vu? 

Not delaying further, I accepted my RAM, retrieved the PDF file, and started working ahead :-/

theta & Hss

Warning:
1) There is no typo in the title. Post is no way related to any snake or any snaky-Mallika.
2) Post is too clumsy; you shouldn't enter, if you don't want to get lost in notations. One reason I am writing this is just to note down my repeated absent-mindedness (RAM), and make a record of it.


All it is related to is, estimation of parameter in a process driven by fBM, which is certain kind of H-ss process... and then my stupidness.. which lead to mere waste of more than 15 days of CPU time.


So here goes a detailed account :
We are working on,  to be very precise, on estimation of two parameters of a process driven by Hss (H-self similar) process. So the two parameters we were interested in were theta and the Hurst parameter, H. We were studying two different procedure simultaneously; and at this stage a simulation study is being carried out for both of them.

Some 20 odd days back, we were almost through the procedure for estimation of theta. It involved the calculation of a function in some grid for theta. Since I simulated the process from a known theta, at the first place, so I choose the closer grid. I thought, if original theta is 7 why not take grid of values in  [6, 8]. So I made the R program on the run, keeping the other parameter, H, constant.

In the meanwhile we got almost certain with the steps for estimation of H. Now for this parameter the range is (0,1). I was checking things out, sometimes for 0.6 sometimes 0.7. So far so good.

So when the program for theta turned up, it gave the estimate as 6.47. All of a sudden I felt like slapping myself. I thought the original theta is 0.6. What a fool I am to estimate in range [6, 8]; should have been [0.6, 0.8]. (Note: I hope by now reader must have already noted first instance of my RAM.)  So, now the only thing that could be done was to ask the R to redo it. As an obedient assistant, it started the work.

Now today morning, when I came to the department, I saw R smiling at me with the result. This time it was something 0.637. Well, it took 2 mins for me to realize that the original theta is 7. So the program which I did on first place was correct; and it was the parallel estimation of H (running in my mind) that confused me. to select the wrong grid later. OK, so up till now it looks like I was not at much of a loss, since I still had the previous simulation's result; which was supposedly correct. Now the big surprise is yet to come, which will be the 2nd and final instance of my RAM.

It took me some 10 minutes to realize that the original theta which I was using in simulation was 5 which could neither be in [6, 8] nor in [0.6, 0.8]. At least as far as we go by the norms of Real Analysis.



PS: Well, in case, despite of the warning, someone still dared to enter the irritating territory of this post, I am no way responsible for any kind of mental damage you suffered. Still, on humanitarian grounds, I express my deep sympathy for you.

in NY too..

Bed bugs aka Khatmal aka Dhekun or whatever sweet name u wanna call them with.. but the news is, they are not only bothering UniPune hostels.. but NY too!!

..have a look at this.
nice to see na, that even a developed country like US is struggling..

You might think what a big deal.. but ask me.. they are actually a big deal, when they are spending nights with you.
I can never forget 3rd semester, when they actually attacked our room. We always used to keep lights on, so that once anyone gets a bite, that particular piece of devil can be captured, and thrown into mug of water (FYI that is the best way to kill them). Sometimes when light was off, i actually remember one of my roommates. All of a sudden she used to get up from her sound sleep, scratching somewhere, and bravo!! that she used to find the culprit with the help torch in her mobile.

It was only at the end of semester when I was fed up of the mess, that i started a massive program to get my room cleaned. And unlike batch mates, i succeeded in the mission (up to some extent) .

Now also once in a while they visit me. But by God's grace, i have become quite a expert in handling them, so that their visits are never long and unbearable.

PS: Ever you need any tips about these creatures , you may contact me. My dissertation on them is almost half done :P ;)

PS to PS: what a nasty post na :D

..make me lazier

..you came along and changed everything.

you lift my feet to the ground,
you spin me around,
you make me crazier crazier...

you stuck my feet to the ground,
you make me unable to move,
you make me lazier lazier...

This is what goes in my minds when ever I listen to this beautiful song from Taylor Swift.

And as if laziness is directly proportional to weight, to complement this insanely edited song, what I dreamt today morning was even funnier. Can't recall the exact situation, but it was something like: I am checking my weight and to whichever weighing machine I am going I find the figure ranging in the interval ( 70,120), where the actual interval is (45,50). And the most amazing part is that every time I am checking I get to see a new quantity on the screen. Though looking at me one (even myself) couldn't actually find any difference. So the obvious reaction is something has happened to the working of all the machines. But when it worked normally for all other beings around, then I was forced to believe drastic and fluctuating increase in weight. Though I am curious about what actually happened next, but have no clues :O

Dreams apart, getting back to reality..

Yes lately I am feeling I have been getting lazier and lazier. Since this has been happening for few months and getting lazier looks like a process to me which is still in some progress (can't say negative or positive), so can't say when it started. Now saying started doesn't mean I wasn't lazy before (but u may call that as Lazy-1 and stage now as Lazy-2). So this Lazy-1 comprised of things like asking roomy to pass water-bottle, unwillingness to move and pick something from one end of bed when i am at the other end of it (to be noted mine is a usual single-bed), etc. it isn't hard to guess what other activities supported this Lazy-1 attitude.
But I always used to be active for activities like... :O activities in which I am lazy in Lazy -2. I am surprised that I have been avoiding trips, dinners, shopping sessions, outings, and any such fun stuff. I know here I sound totally non-human, but.. :(

I don't know whether it is laziness or reluctance due to Piled Higher and Deeper ( PHD) things to do. Whatever it be, I have already started working on it by wasting less time here and there on trivial stuff; so that i can't complain of shortage of time for studies. Although I am not at all typical-intellectual-studious kind of person, but this Lazy-2 behavior gives people around a feel as if I am that. Its just that shifting from M.Sc. to Ph.D. requires a bit of increased regular work... to which I am not used to :(
I am not very happy about the fact, but its time I should accept that I haven't still been able to get into a regular schedule. Hope I'll do it before it is not too late.

anyways..I have already wasted lot of time now..so getting back to work. :)

titleless again

When lectures are like those in pastimes the one is forced with these. But when they are some thing like advance stochastic processes and stochastic models in finance, and still one is interested to make one on the side bench smile, then the only choice one is left with is this...
(kaam chalau..)

So now whenever you see some such thing on the desks in classroom at ground floor or that at the top .. this is not meant for everyone reading...then you don't have to wonder who the artist is.. :D
Tarang was the one who used to make these in graduation days, and called them TODA. I still wonder what could be the reason behind giving this name to a drawing of baby elephant's back(u see I have to mention that in order to make sure that people who look at this don't see something else in the figure :P)..may be like many other things in life this is also arbitrary.

Today I was having breakfast with a friend. During chat we landed on drawing and sketches. And that fellow shared his experience. He used to be in trouble whenever asked to make a sketch of girl (..why only girls :O .. :P); he did one simple thing as a escape: made back side. And teacher used to say why you are always behind them..(yes dear why not face them :D)..hehe..
So this reminded me of these cute Todas on all the desks of department I have been making since 2 years or so...u see the point.. it could be anything..girls or elephants.. drawing of back side is easier.. :P

On a serious note I am in some sort of problem now, in the sense that up til now I used to utter all crap and blah here, and never cared for what I wrote, most of which was some dull, dumb, sad stuff which always misrepresented me. Ideally I always intend to write not only all the negative stuff but all such things which made me smile, laugh, some thing encouraging too. But most of the time I catch hold of blog only when I am upset. I try to edit this tendency, but I am helpless. I never cared about what people reading might think about me, because most of the time they were strangers and didn't knew me in person; if at all some of them know me they know how weird I am, so no botheration. No problem up til here. But it arrives when someone who knows you, but doesn't know how weird you are starts reading, and is wondering..

PS: I am totally confused about
>what I was asked to write early in the morning (something humorous)
>what I was thinking to write few hours back
>what I started with
>what it has turned into

anyways atleast all of it is not the usual depressing stuff. :)

I am proving my dumbness in my blog too.
Just noticed that 4 out of last 5 posts were written on a sad, dull, low note. When I was upset. Does that mean that is what I feel 80% of the time. Then this could be a misuse of statistics; a non-representative sample could lead readers to make wrong inference about the writer.. :P
Lets do some work now.. :-)

Invigilation duty

Two days ago, due to some sudden problem, Ramanathan Sir gave me duty of invigilating, actuarial students, for 2 hours (some internal assessment). I thought waste of two hours, and will be bored. But I took some problem with me for solving.
But it was entirely opposite. It was fun doing that. All the time I was wondering and remembering my days, when I used to be on that side. When they used to look here and there then it reminded me how I also did that so often. I had a strong dislike for filling sheets over sheets, which most of the friends used to do; so my answer sheet used to be have least possible number of pages (one reason was I used to study least so nothing to write :P). And consequently, I was always in habit of running away from Examination hall, even if I had things to write, as I was very lazy. And if in case someone tries to gets up before me, it was like a challenge to me; and then I can't allow another one to do that.
It always appeared to my mind, to tell the teacher, please take viva, but don't ask me to write. Aur agar nahi araha to why to keep pondering over the question paper until the last minute. Is some angel about to appear all of a sudden and tell me what is the answer to that question?..
(Back to present...) Alas, many of the students did the same. Kept staring on the paper and window alternatively. And for a change on there class fellows too. I have no idea about the difficulty level of paper. Couldn't make out a single question (except for the last question which asked about some Taylor's law, in which I knew the word Taylor, atleast :()
I thought of making some sketch, but it was more interesting to sit idle and watch them.
:-)

An Entrance Test That Was

It was full of core mathematics… algebra & complex analysis…and a bit of calculus. I could solve neither of them, but atleast calculus questions could be understood .One of them made me wonder what used to be ‘removable singularity’. I learnt these courses 2-3 years back in my graduation, but neither were they in that depth nor did I like them so much to study on my own.

I am talking about IISC enterance exam for research. I and a friend of mine filled the form for research in mathematics department as they don’t have one for statistics. We got convinced by looking at their webpage that they have work going on in advanced probability theory and time series, but when told by TVR about the actual scene in statistics, what I could say was just that ”chalo koi nahi…atleast we can try solving paper just like that..anyways I don’t have to go there”.

And when I saw the paper I was so amused, that I cannot stop myself from smiling. I was thinking how many minutes I will be able to tolerate those mathematical questions.
I solved a few objectives, and one cannot imagine how many were guesses ;)..
But when I came to subjective questions, I can only try reading and understanding the 2 calculus ones, I played with them for about 15 mins. There was no question of doing that with isomorphism, homomorphism, order of group, cyclic group, analytical functions and singularities. So insane of them to put not a single statistical question, atleast it would have been easy for me to pass time.
By the by, during all this invigilator came to desk for signatures. And I made no delay in asking about the time limit one has to sit there, which came out to be 1 hour.
So, when finished with the maximum I can do with calculus ones, I was wondering how to spent the other 20 mins, I wasn’t sleepy even. All of a sudden I located their symbol on question paper, and since drawing is a good pastime, going by my recent experiences. I tried hands on it for quite a while. And then it was 10:05 am. So, time to leave. I asked the person and left the room.
But then there was something more for me. As I was about to leave the centre, a person with long hairs and long beard(LHLB), who claimed himself to be in charge stopped me

LHLB: Were you writing the exam?
Me: Yes..
LHLB: You are not supposed to leave before 11.
Me: Invigilator didn’t tell.. :o
LHLB: He might not be knowing, you should go back.
Me: What if I don’t, will I be disqualified?...You may do that.
LHLB: Its not a matter of that, you are not allowed to leave
Me: I am not well.
LHLB: Sleep there.

He grumbled something for invigilator and sent me back. Never wanting to go back, I roamed here and there in the building for few mins as he was not clever enough to send some one with me, to make sure I am going back to room. I again came back thinking of some way out. This time I was lucky, as no one there on the entry, so I came out in hasty steps, as if escape from custody. When I was far off I got relaxed. But all of a sudden my conscious said why am I running. Someone inside said me to go back and tell them I am going with some strong good reason, even if it’s a lie. I was confused, I turned my steps twice to move back. Finally I decided to go back. Entering the control room, I said I cannot sleep even , I have got dysentery. He was like, “OK on medical grounds I will let you go”.


I could not stop myself smiling on the whole way back, relaxed enough I turned to OC had breakfast, wondering how much scolding that invigilator might have got because of leaving me early. :)




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An "E" again

As a result of those pastimes in the lectures I was totally blank on the day before of sampling internal.
I don’t know why there is so much of repulsion between me and sampling. Yesterday it seemed as if someone has put something around my head, which is not allowing anything to enter within; may be some sort of firewall which was trying to protect my brain from sampling stuff.
I sort of hate it. I know its not good at my part to say something like this for a course in statistics. But is it necessary to like each and every part course. I don’t want to be a sage to love everything and hate nothing. In previous semesters I didn’t liked DOE. All this doesn’t goes random, I have figured out a tentative pattern behind: may be I dislike field and industrial type papers. What I like is theoretical topics along with applications. I am myself confused. Because at the end even stochastics and markov chains are there for data handling only. Let it be, I will try to analyse my situation some other time.
After 1st internals, I convinced myself for writing notes instead of making cartoons. In each lecture of 1 hour I used to give 5-6 failed attempts of paying attention to what she is saying. And I cannot retain my patience for more than 2-3 mins, in extreme case it might have gone to 4, but not more than that.
And then day before exam things become tare zameen par.
Things are even worse when you get stuck with some problem of markov chains, solving which off course is more interesting than studying this.

So I have only 3 options for the grades in this course…and that are
a) E
b) E
c) E

Doesn’t matters…at least the course is over.. so no more bearance…




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A troubled Eye

the day I wrote last post I was already not in a good form and another thing that kept me occupied the whole day was one of the murphy’s law..”Things tend to go from bad to worse”.... There was some intuition that things are surely gonna be worse for the day and one ahead but I did not knew how.
I went outside the campus in the evening to finish some work and while coming back something crept into one of my visual organ. I was alone so in an attempt to remove it I kept rubbing it...until I reached hostel. A friend helped me doing it but it was already in sort of injury. And there I was with the most boring way to enjoy a weekend. I was supposed to close my eyes and give them rest as much as I can....I have to do that with both, because eyes are the twin ones and don’t do anything alone....and without them if I was unable to study the course then it might have been alright, but I was not supposed to complete my second reading of English Teacher also.. :( . What else could be done, no movies even.!!!
Every time I am the one whos scolding people around for not taking care of their health, bt this time everyone else got a chance, as if taking a revenge. I was one of the quiz cordinators to be held on saturday, but then with eyes closed the only thing I could do was to give suggestions on what to ask where, thanks to the partner she managed everything quite smartly.
After sleeping for 14-15 hours my patience ended. Friends tried giving me company, and not to let me bore.. I am not at ease for asking people favours...it makes me uncomfortable if I bother someone for quite long.. and that was the yesterday eve... so at around 7:30 to make myself relax, went to the roof..in a bit of sad tone.
But moon made me smile as I climbed. It was not full, may be in a day or so. But it filled everything with its light, as if giving a positive feel to everything. I decided to lay down. I think nature is the best thing that was ever made by God, better the human even, we are good for nothing just spoiling all the beauty. The breeze seemed to be very special, as if taking away all my worries, confusions and dilemmas. Now as I am writing this I still have to hold my eye and bear with the itching patiently...but then I could not keep myself away from scribbling here anymore.

Pastimes

Among all the 21 courses (including optional as well as compulsory) I did as a part of M.Sc., I liked almost all of them, and there has never been any kind of dislike except for 3 of them. Every beautiful thing has a spot in it, if moon can’t escape then how could this curriculum do. And the spots are so unbearable, at least for me that it becomes necessary to find some pastime.


2nd semester had some non-single-valued kind subject. I always managed to get a seat in last row, and did all sorts of things which kept me occupied and did not let me pay attention. It could be novels, mobile games, sudoku, kakuro, loop the loop, playing bollywood with the fellow on right or left, etc.


In the 3rd semester it was designer subject. I could not succeed in doing something very interesting in his classes except for listening radio(using headsets) and music on MP3. But he was attentive enough to notice, who is doing what. I will be always thankful to him for giving me E and saving from F.


This semester, it has just started but flying away, with the 3rd one in this sample. It’s the most intolerable thing I have attended. Lectures are full of confusions, with all the mess at board and its hard to find what being going on. I should stop criticizing her anymore. I have got no rights to do so, as she tries gives her best, but there’s some gap that we are unable to catch her.

So, being helpless, I again got resort to some pastime. This time it was something different from previous ones. I started sketching the cartoons. As I am bad at giving a form to imagination, so they are off course not original ones. But now making them it has become quite a strong desire. I always wait for the sampling lectures. Let me share a few.