Saturday, February 5, 2011

6 Engineering Assumptions~I loved to make in exam

Quoting from one of my beloved lecturer (Pn Kiran) that teaches English, "Jin Khang, do not assume! When you assume, you are making ASS of U and ME. "

If memory serves me well, the reason she ranted this sentence to me is probably because I like to use the word "assume, or I guess" in most of my daily conversations. After all, the "assume and I guess" works sort like a "get free of "responsibility jail" card ",

which basically means "hey, I don't know whether I've done that shit, even though I am quite sure I did it. And if shit happens, don't say I didn't warn you. Now go and double check this shit".

It's probably the worst mindset you could have when you are entrusted to some responsibility. But then again, never once I admitted that I am good in any administration/leadership kind of stuff...fine, you could say I 'm spineless...But then again, from what I had observed, administration/leadership skill doesn't matter much when it comes to choosing a leader. Because the majority always had the mindset "Hey this guy is cool/outspoken/weirdly weird enough to be our leader. So pick him as the group leader". And it explained why I was entrusted to some leadership role...twice, (because I fall into the "weirdly weird" category).


(*it doesn;t happen on the U. People are rational enough (or perhaps started to know what power-hungry is *)

And yeah, what I want to write again? Oh yeah, Puan Kiran... Yeah, I talked about how my lecturer, Pn Kiran, hated the element of assumption. But unfortunately she doesn't know, that my future career is related to engineering field. And after years of enrolling in an engineering course, I noticed one thing~ engineers love to make assumption (like how mathematician did~)


(that explains why Pn Kiran is stuck teaching instead of working in an engineering field, she hates assumption)

We engineers, in some (or lots) of cases, we love to make assumption like "assume this variable/effect is negligible, assume a steady state condition, assume this *constant* to be some constant value *number* , assume this item is isotropic and etc etc etc*

And things get even fun when you are told to make an "educated assumption", and your solution will be based on your assumption. Just yesterday, I was involved in solving some question that involves some scary geometry because a lot of shitty variable has to be accounted, and the final solution is getting awkward...until

the TA say "thickness is negligible in your calculation. Just include this fact in your assumption and you have a much simpler solution". Whee!

And so, I was thinking...If we could just make assumptions on these kind of questions~...(note, technicality incoming)

Problem 1-assume a negligible value
Given this piece of metal with these dimensions x length, y width and z height, with constant k(thermal conductivity), with difference of temperature (y). Find the heat conduction rate~
My assumption: Heat conduction rate in the above problem is assumed to be negligible

Answer: Zero

Justification: Often time, when we do engineering analysis, we have to omit some term (by making some engineering assumption), so that the algebra involved is much easier. Also, some term are omitted because they meant to illustrate some relationship between 2 variables. There might also be cases when a particular variable will involve you a lot of calculation, yet giving an answer that is close to zero. Or (maybe most of the time), they just want to save time printing and writing textbook, and the textbook writer hates calculus

Don't do this: Because when the question ask you to find x, you say x is negligible and proceed to give a zero as answer. This is like "hey, I am asking you whether you stole my money" and you answer "in this case, your money is negligible.......and proceed to say, zero is my answer"

Problem 2-assume a constant value
Given this piece of metal with these dimensions x length, y width and z height, with constant k(thermal conductivity), with difference of temperature (y). Find the heat conduction rate~

My assumption: I assume that heat conduction rate is a constant value of 1

Answer : 1

Justification: Sometimes, textbook knows that you have to solve a 3rd-4th order of differential equation, and thus, they provide you with some constant so that you could save some time and instead solving for things that really mattered

Don't do this: Because when question asked you to solve , they are asking you to SOLVE the answer, not ASSUMING the answer



Problem 3-assume a working conditionsGiven this piece of metal with these dimensions x length, y width and z height, with constant k(thermal conductivity), with difference of temperature (y). Assume the conduction rate to be TWO dimensional. Find net conduction rate on point (x,y)

My assumption: I assume that the conduction rate is ONE dimensional (f**k it, two dimensional type of question is hard)

Justification : One dimensional type of problem involves a simple plug in into formula work while two dimensional type of problem involves shitty differential equation stuff that gonna makes you bang the wall. Therefore, in most engineering condition, we love 1D heat analysis than 2D heat analysis, but sometimes, people had to go through some shitty 2D conduction rate calculation because an accurate answer is needed

Don't do this: Because you are basically changing the question


Problem 4 - Deriving a formula
Given this piece of metal with these dimensions x length, y width and z height, with constant k(thermal conductivity), with difference of temperature (y). Derive the formula for heat conduction rate

My assumption : Since I bring my textbook, I know what the formula is

Answer  : (copy from textbook, skipping those derivation process)

Justification: There's always a lot of exam question asking you to derive formulas, while you are thinking 'WTF other engineers/mathematician had derived this thing before, found us the formula, and print it in textbook. (possibly getting some nobel prizes in the process)" So why did you want me to repeat this whole shit again! Well, deriving it, often or not, test whether you understand the working concept and algebra behind the formula, so that you won't end up as some engineer that only know how to memorize formula.

Don't do this: Because "deriving a formula IS NOT copying a formula"



Problem 5 - Reality, dude, reality!
In a circuit, a resistor of 5ohm is connected to a 6000Volts power source, find the current in resistor

My assumption: In reality , when you connect a high voltage power source to a low resistance resistor, the resistor is going to explode/fried...

Answer: 0, the resistor is fried

Justification: You might be true in trality case, but then again, how many textbook questions are based on reality ? They just want to train your problem solving skill

Don't do this: Because  1.)you are inferring how stupid the person that write the exam question, and 2.) you did not solve the question. Expect a mad professor to give you a fail grade because of that answer alone. 


Problem 6- My answer is always right  
Given this piece of metal with these dimensions x length, y width and z height, with constant k(thermal conductivity), with difference of temperature (y). Find the heat conduction rate~

Answer: My answer will be the correct solution

Justification: Ok, this is just not going to work

Don't do this: Unless you want to get a fail grade in your exam

Thursday, February 3, 2011

Happy Chinese New Year, or wait...

You sure the word Happy is the right word here?

And wait, I just thought of the best greeting card I can have for this year

Hi there. Happy Chinese New Year. Although you have a writing assignment due today, fluid mechanics and heat transfer homework next week, 1 quiz and 1 midterm due next week.....dang the card was not long enough. But still, HAPPY Chinese New Year

I can say that my Chinese New Year in Malaysia are more awesome than this sh*t........or wait...

===3 Years Ago===

Me    : It's a good weekend, dang, why am i waking up so early, zzzz
Mom : Work! It's the OMG Chinese new Year. Get your shirt and work ready, and yeah, btw, don't wear    black shirt during work
Me    : Hey, I had to went back to Shah Alam after....
Mom : Ok, 5 more minutes and we gonna move..
Me    : Ok... Wait me to bath...

===5 Years Ago===

Worker A: I get like total of RM200 from all the customer I served . Some customer just gone apeshit and keep giving huge amount of angpau. It's RM20 per angpau. Dang, this is awesome....

Worker B: Huh. This is something that happens often, this happens like 3 times a day during chinese New Year. hey, Ah hong, how much you get...

Me         : RM2...( No wonder no one was there when things get really apeshit. You guys leave your post and leave all those shit for me to handle)


===3,4,5,6,7,8,9,10,11 Years and on going===

Me         : Why we have to work during Chinese New Year
Mom      : No money. That's why


                                 (humming) Money don't grow on trees, I've got bills to pay, i got mouth's to feed.....(Ain't no rest for the wicked)

===4,5,6,7,8,9,10 years===

Me and friends : Happy Chinese New Year, wait, why there's no one in the house?
Friend A          : Dunno, I heard he/she went relative house / overseas to celebrate Chinese New Year

===(Happen every goddamn years)===

Me : Shit, just how many homeworks left. Ow shit, fine, guess I just don't submit....


===(Happen somewhere in childhood year)===

Mom : Don't steal the kuih kapit anymore
Me    : Ok (snatch another piece)
Mom : IF U WAN TO STEAL THAT MUCH, EAT THE WHOLE CAN!
Me    : (keep eating)

===(Years to Come after the event)===

Me    : Sorry, I don't like kuih kapit. I don't even know. I hate it even I smell it...


It's just some recollection of those "good 'ol days of my chinese new year. And being a negative attractor, you couldn't blame me for thinking those stuff first. I mean, those events always stand up than "celebrate cny by eating together,  spring cleaning, playing firecrackers and etc"

And yeah, I noticed that people in Malaysia start rearing rabbit because today is rabbit year (I presume). Just to let those people know, rabbit is sensitive to its environment, and unless you have the effort of rearing rabbit instead of spamming Happy CNY in facebook, it's not a good idea. For one thing, many more rabbits will die (by human hand) in rabbit year compared to other years.

This is the habitat rabbit should belong!

Well, this flurry little thing eminates nothing but cuteness and fluffiness. Rabbit, as much as I want to rear you, I know it's better to see you running in some random green field than a cage, or ermm....can i rear a squirrel instead?

And wait, if you really need the presence of rabbit that much. I suggest there's one "rabbit" that will do the job way better than this fluffy guy. 

Free ads: You want cute, sexy, wild, fluffy. We all have it. Rabbit? Sure, you can call them anything you want. Chick, honey and hey, rabbit sounds a good idea! c

Friday, January 28, 2011

Opening up the Pandora Box

Prologue 

You sure you want to do this?

Yeah, it has been too long since the nightmares has come upon me.  I think it's time to come clean

You sure? You could have continue doing the same thing. Just left it be and eventually it will be....

It won't. You know it did you. Sometimes only the worst thing doesn't go with time. Like some old memories. I guess, I've been roleplaying the emo-kid for long.

Why don't do it on the 22nd?

I don't really have a time for me. From yesterday's call, you should know there's not really a thing of  good and bad timeing, do you?

Even though you want to do this, why bother writing on HERE. Duh, this is a public blog, FFS.

Well, I have the faith that no one is planning to read this, or even when they do, I guess hiding this thing like some hidden secret would not make a difference. And for some unknown reason, I had been trying to avoid this issue for some long, that I think I shall probably write about it instead of letting it grow, and eventually consumes me without me knowing.

Fine, make sure this is your last emo post. After that, no more

Fine, I will write something like top 6 most irritating internet comment, or sort. Oh, well, maybe some whining sometimes

Here goes. Make sure you have time to do your thermo II homework (and yea, a design before 8pm)

*Opening the box*

Background
Erm, how should I start this whole thing...  Yesterday, I received a call from mom, and things are going in an as usual routine, until I realize she says:

"Your father is going to die soon".

It's not exactly a depressing news, it's like a news of " Internet sedition Act" is coming, surely it's something, but MEH. My mom plainly state it in a "matter-of-fact" , which I pretty much should have expected.

" There's one day I thought your father is going to die, and I wanna to give your a call. Unfortunately you didn't pick the call, (phew). So question, son. If your father wanted to say his last word to you, would you listen....."

MEH, i mean what! ARE YOU KIDDING ME. And the following 50 minutes is me whining of.....life and complaining until my sister say I went overboard and mom started to have teary eyes....

Well, I mean, that's the reason why this post exists, right? Contemplating... I mean, things must have gone way wrong if my mom wasn't feeling happy about my 50 minutes response. I mean, I hate my dad like how I hated a cockroach, but my mom is probably the every reason I will be in US, typing this contemplating post. So, it's my fault...but...

Wait
You'll couldn't blame me for the outrageous response. As much as I can remember, I don't have any "good memories" associated with him. Things like (breath deeply) , throwing a slipper when I was taking a nap in the shop, locking the house because he wants my mother to sign the mortgage, hitting my mom when I was a 7 years old kid, and for the next 5 years, my mom worked like crazy for the mortgage, got herself a cancer in processes, removing both me and my sis a good and loving mother, and deprive my sister of schooling just to have me studying here. Even as I faced the mirror, I saw the curly hair, a sign of my bitter childhood thanks to teasing, and the genetic link that I was his son. And even when I was angry, the anger I had reminds me of his berserker-like rage. And how do you expect...

But, mom and sis, as you have said, I am the least person to be harmed by him. Both of you, one way or another, suffered more than I do. And how could you just forget all those things when life was finally at peace. And sister, even when she talked how she could kick her father right to her coffin, had became rational, and saying things that an elder sister should say...She still remember it, but she is letting go of it

While I was still one way clinging to the vengeful past... of my own father

But
(Breath deeply), but deep inside, you know he's used to be a good father, bringing you and whole family to explore some exotic places, and sometimes if you lucky enough, he boiled you one hell thick of a milo  (which explains why you love thick milo or coffee) , and sometimes when he's back, he would probably bring his dinner , and you and your sister would swarm and finnish the food before he could barely enjoy his food.

Wait, where does these good old time goes. Blame it on gambling? But he's rotten enough to put everything on his hobby...

*breath* . Still, he's your father (ugh), despite that you refused to fill a name on "father guardian" post, because it's hard to explain to teacher that my father was ...erm i dunno, run away and leave a lot of debt kinda stuff. 

*He's still your father, and aside for his gambling and bad temper, he's been the main supporting pillar in you first 12 years

Still
You expect me to forget everything? That pathetic piece of humanoid skull is my father! You gotta be kidding me! I would go as far as changing my family name to Lee if I could. You heard me! He's the nightmare that I had during my secondary school, ranging from filling the form, working in weekends, a stressed up mother, and...and...If the law permits it, I would have thrown him beside the road, that he's befit too....


The problem
is no longer about him. It's you. Don't you notice how you get cynical of people, how you doubted a sincere help, how you dismiss a compliment as fake. And how much you reacted when people point right at your hair (ugh). 

It's about you, those envious oblivious look when others are acting like a kid, while you looked back and despise how bad you are as a kid. You've changed, partly because of the anger you had harbored for years, from a innocent kid to a teen that simply refuses to believe on anyone.

You've lived to see through your way, but you know if you wouldn't insist in your way, there's a better detour. 


It's time, to forget about it. Harboring a vengeful thought to someone that is going to die, is not going to hurt him as much as he hurts you. Nor casting it beside could help you. 


There's a reason why this post exist. It's a portal for you to communicate between the you and the past and the you typing in the computer (which is psychotic, but it works)

Your words above has released the emotions and anger you have always within you, and so, just left it here. Continue your lives, and this post will remain as a stint and nooks of your life has gone through, like many other post you've posted




Epilogue
And what am I supposed to do when the call arrives

Do as if you 're paying a homage to a person that's going to die...

But I still don't want to say the word

Up to you, you've made no benefit for being foolhardy to a person that's going to die

Fine

* Closes the box  *

Thursday, January 27, 2011

What is me,
If I should forget those memories since I was young
What would I be
If I should forget the anguish I had tolerated
What would I be
If forgiveness instead of hatred is the choice

In the crossroad between old hatred and forgiveness
What would I be?

--------------------------------------------------Yami

Monday, December 13, 2010

Saturday, November 6, 2010

Some Friday Night Story

It was one random Friday night, when pubs got full, party got crazy, beers get overflowing and crowds get high, leaving a unknown void in the student campus, leaving an unthinkable silence and chill.

Oh maybe it's not a void , not empty at all, a silhouette was seen somewhere on the lamp. Or was it just an illusion of the night.

The silhouette rises her head, so, it was a human after all, squealing herself in the midst of these dark void. She rises her head, look, and put her head down again. It was a transition of hope to despair, a chance went to bubble, all shown when she rises her head and went down again, a seeming meaningless action itself.

What was the girl doing on the night, a night of absolute void, a night of absolute zero, squealing herself  like a statue on campus?

A brief sound of sob is heard, and then it's heard no more

As the view shifted further and further away, thousands of questions were in mind, but in the end, there's only a silhouette in the campus bicycle parking spot, on a random Friday night.

Tuesday, November 2, 2010

11/1/2010

I don't even know what to type for the title, because I think I had used all possible title for an emotional post.

But, shrug, I am unhappy today, and I think I need to vent out ( with the proper way ), before I can calm down and get back to my study, and I think facebook was just not the right place to do it. Every 10 - 11 post, there will be at least one post related to complaint. Me thinks that I shouldn't burden another 209 facebook users with my complain post, so I decide not to whine anymore in facebook.

I still remember people saying, whining in facebook is utter fail, and I first, agreed with it. Although lately, I had given a thought of it, why people like to at least, utter one or two complains in facebook, and I think, I had the answer.

It's very very very hard for a person to swallow a day of discontent without telling anyone, especially after you have a day of bad luck, the first thing you will do is probably shooting some of your discontent in fb ( this sounds like me ), hoping there's someone that will tell you to calm down, showing some concerns through the comments, and etc.

To be short, we are attention whores, especially when we are hurt, we would like to have someone consoling us. However, noticing the word that I use (whore), you could say that I don't like the fact that I had to whine somewhere when I had problems. There's one particular example which I remember, when I had extreme food poisoning in a long trip, having my spectacle flying away from me in process. And well, I posted a post on how my spectacle lost in an accident, and the result...well, many notification, but not good ones...

People are laughing at my own clumsiness because on how I saw my own spectacles flew away, and there's no "consolation word" that I'll hoped to have. And seriously, that particular experiences probably pack more punches that losing the spectacle itself.

And few days later, I accidentally read about an article, and it gave me a real big smack. A simple wikipedia link

Self-pity or "feeling sorry for oneself" is the psychological state of mind of an individual in perceived adverse situations who has not accepted the situation and does not have the confidence nor ability to cope with it. It is characterized by a person's belief that he or she is the victim of events and is therefore deserving of condolence.

And the moment I read this 3 lines of word, I am so ashamed for myself for realizing that all these years, I had been a "self-pitying person". I had no idea what I had changed into me, but I think the day after that, I seldom post emotional stuff in my facebook. As though I am unhappy, the very notion of deserving condolence is a direct punch on my pride, which I don't think I can do it.

And school started, I got enveloped in work again, and given the fact I had multiple workload, I think my chance of getting emotional will eventually multiplied as well, however, there's one sentence that saved my day.

Life is not about waiting for the storm to dance, it's dancing in the rain. It was a nice sweet quote hanging out in a church nearby my house, and this innocent looking enough sentence, saved my life, and when I had an impulse to complain and wait for comments, I asked myself to smile and continue working in it.  The very notion of dancing in the rain is cool, and it's something I've been looking forward one day.

And yet, times goes by, the quote is replaced, and workload however, remained the same ( in fact, multipled because of my active enrollment in certain project ). And I started to feel bad about myself again, and bad, depressing thoughts crossed my mind, and the quote that I once adored, disappeared,  although I desperately tried to recall it....

And so, my life goes on a wave of content and discontent, happy and unhappy times revolved and I had no control on my emotions and feelings.

Until few days ago, I read someone else blog, and then I noticed it was a lament about no friends to listen to, craving for love and support, and those feelings were those emotions that I had been experiencing , that I had been trying to repress, and thus, I commented about it.

But one thing I noticed though, she was a very social girl, and no doubt, she should have a lot of good friends that will listen to her, hence, why the whine? This question has been doubting me quite some time, and I thought, maybe a reminder of her asking for her friend help is a good thing.

And the reply somehow, left me confounded " because I am scared of losing reliance ".

This is an answer that reminded me, of the very notion why I am isolating myself, and I feel like talking with her, but then again, the inferiority complex had gained a triumph over me, and tell me not to do that.

And so, I think, the best thing I might be able to do, is to give her a quote that I used to like..."the dancing rain quote, and after some google search, I managed to find the whole quote back, and shamelessly copy and paste into her comment.

I don't know whether she reads my blog or not, but if she does, and feel like needing an ear, she can always shoot me a message en email, not because of pity or etc, but simply because her blog is a good spot to procrastinate, and get back my hope pumped up in study, and it's certainly a waste to have those inspirational post disappeared

and talk about today, i was so sad that...

Huh? I feel much better now.

And now I noticed what this blog for.

By typing every single word in this post, I was directly conversing to myself, and as my mind sort to figure things out when I vented out my feeling, my mind just feel better.

Or maybe because the lengthy post and thinking process made me stop thinking how unlucky I am, or maybe it's because I sorted things up as I typed all these lengthy stuff....

Funny, maybe it is the right method of blogging, a way of venting out and sorting things out in process. two in a time

and shrug, laplace transformation