Thursday, June 2, 2011

and we were taught the wrong one all along

know how the school textbook sometimes don't exactly teach the right thing? and it stays like that until no one knows when.

so today was Seminar (i don't know how to explain this, but let's just say it's a subject where we're exposed to the research labs, something like that). for the past half semester, it was only like a class session with the sensei from respective research labs giving lectures explaining stuff regarding the topics related to their labs. as any lecture may be, those were as effective as sleeping pills. sorry sensei m(_ _)m

so, from this week onward, we're split up into 4 different major labs. there were Fluid Dynamic, Machining, Control Engineering and Thermodynamic. fortunately i got the one of my choice-fluid dynamic. coz it just seems interesting. as my sensei says, choose something you like, and this one involves aeroplane.

and here, like i mentioned, we learn about planes. yeay, i love this! so, we went at the meeting place and the sensei later arrived. seems like we were to watch a DVD for about half an hour.

it's a video about migrating birds. rather than 'about' the birds, it only 'shows' the bird. half an hour watching birds flying and flying through the globe, with barely any narration. how i think the video is actually a video for relaxation or somewhat. well, it does have a soothing effect like a healing video for stressed people.

okay, the point here was only to spot the difference between flying mechanism of living things (bird) compared  to human inventions (okay, now i wonder why 30 minutes are needed for that sole reason). so, we were asked to explain how exactly things fly. the stuff about lift and all. this reminds me a lot to Ishimatsu-sensei. i was like, "why the heck don't i remember much of the contents of what he taught me before?".

so, the 7 of us tried to remember what we've learned so far, and the explanation that there are pressure difference due to the different velocity of air above and below the aerofoil. i sensed something when the sensei was not really satisfied but i had no clue at the time. he even asked us why exactly the air that split at the front of the aerofoil must meet at the tail. of course, we were puzzled too. well, the above explanation was generally what we were taught during school and i've remembered it like that ever since.

if only i remembered Ishimatsu-sensei's class...

so yeah, that kind of explanation(the so-called "principle of equal transit times") is already obsolete. and i only discovered that after i returned home and surfed the net. when i read it here, it all makes sense. and i'm pretty sure i've heard/read this same explanation before, but it just didn't stick in my mind. like how 'Newton Law' or 'Air Viscosity' play a role in lift. we are people, and we forget stuff.

and i got to do this as a report, and present the findings next week. i wish my nihongo won't fail me.

so, how i wish they teach the right things from the beginning. sometimes, the memory of the first contact with something is the one that lasts long. like how i still remember there are 4 different area of taste on our tongue, and they still haven't introduced umami in textbook yet, have they? and i still cannot remember the correct chemical reactivity series, there was a bit of confusion when the one i remembered from high school is different for when i entered university, is there really any difference?

btw, i'm happy today i got to remember the names of the members of our group, hopefully i'll still remember when i'm gonna meet them next week^^ *nagasu*tomoi*minami*matsunaga*matsuda* just typing down to not let me forget, at least i'll try not to mix up all these

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