Minggu, 05 Agustus 2012

contoh narative beserta OCR - nya


A Little Rabbit and Crocodiles
A little rabbit wanted to find some food in a forest. But unfortunetely he found a big river so that he couldn't cross to another side. The rabbit looked around. He got surprised when he saw a huge crocodile floating on the river. The crocodile's eyes watched him out.
"Aha!" the little rabbit smiled. He suddenly got an idea.
"Hello, my lord crocodile! Would you please come here," he shouted. Hearing the rabbit called him, the crocodile swam closer.
"Hmm, what's up?" "I know you're hungry. I'm bringing some food for you and all your friend. You know it's a big cow. I think it would make you so satisfied," the rabbit said.
"Really? Where is it?" the crocodile said. "It's in the back of that tree," the rabbit pointed out a tree behind him.
"I'll give you, but I must know how many crocodiles are here. Could you call your friend to come?" The crocodile looked happy. Then he called his friends. After a while 20 crocodiles had come.
 "Ok. Now please stay in line. I'm going to count your number," said the rabbit.
All crocodiles moved and made a row. A moment later the big river was covered by crocodiles waiting some food that rabbit promised. The rabbit jumped to the first crocodile's back. He began to count.
 "One, two, three,..." the rabbit counted by jumping up to crocodiles' back one by one.
"nineteen, twenty," After stepping the last crocodile, the rabbit jumped into the river bank and ran into the forest. Then he laughed and shouted, "Stupid!".

 Written by Fadli Eha ~ Sekolahoke.com

Read more at:
http://www.sekolahoke.com/2011/08/narrative-text-example-little-rabbit.html
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OCR-nya :
 
Orientation: there is a little rabbit who wants to foraging in the woods, unfortunately he found a large river in which there is a crocodile.

Complication: when the hare saw a crocodile he was afraid, yes afraid that if the crocodile ate it.

Resolution: The rabbit suddenly got an idea. He called the crocodile and said I know you must be hungry, I would bring a big cow for you and your friend, but you have to call all your friends, after all the crocodile has been gathered, the rabbit told the crocodile - crocodile lined up and counted in a way jumped into the back of the crocodile and alligator finally made ​​it through the river and into the woods.



Jumat, 30 Maret 2012

Prinsip Bernoulli

Prinsip Bernoulli

Dari Wikipedia bahasa Indonesia, ensiklopedia bebas
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Prinsip Bernoulli adalah sebuah istilah di dalam mekanika fluida yang menyatakan bahwa pada suatu aliran fluida, peningkatan pada kecepatan fluida akan menimbulkan penurunan tekanan pada aliran tersebut. Prinsip ini sebenarnya merupakan penyederhanaan dari Persamaan Bernoulli yang menyatakan bahwa jumlah energi pada suatu titik di dalam suatu aliran tertutup sama besarnya dengan jumlah energi di titik lain pada jalur aliran yang sama. Prinsip ini diambil dari nama ilmuwan Belanda/Swiss yang bernama Daniel Bernoulli.

[sunting] Hukum Bernoulli

Dalam bentuknya yang sudah disederhanakan, secara umum terdapat dua bentuk persamaan Bernoulli; yang pertama berlaku untuk aliran tak-termampatkan (incompressible flow), dan yang lain adalah untuk fluida termampatkan (compressible flow).

[sunting] Aliran Tak-termampatkan

Aliran tak-termampatkan adalah aliran fluida yang dicirikan dengan tidak berubahnya besaran kerapatan massa (densitas) dari fluida di sepanjang aliran tersebut. Contoh fluida tak-termampatkan adalah: air, berbagai jenis minyak, emulsi, dll. Bentuk Persamaan Bernoulli untuk aliran tak-termampatkan adalah sebagai berikut:
 p + \rho g h + \frac{1}{2}\rho v^2 = konstan \,
di mana:
v = kecepatan fluida
g = percepatan gravitasi bumi
h = ketinggian relatif terhadap suatu referensi
p = tekanan fluida
\rho = densitas fluida
Persamaan di atas berlaku untuk aliran tak-termampatkan dengan asumsi-asumsi sebagai berikut:
  • Aliran bersifat tunak (steady state)
  • Tidak terdapat gesekan (inviscid)
Dalam bentuk lain, Persamaan Bernoulli dapat dituliskan sebagai berikut:
 p_1 + \rho g h_1 + \frac{1}{2}\rho v_1^2 = p_2 + \rho g h_2 + \frac{1}{2}\rho v_2^2

[sunting] Aliran Termampatkan

Aliran termampatkan adalah aliran fluida yang dicirikan dengan berubahnya besaran kerapatan massa (densitas) dari fluida di sepanjang aliran tersebut. Contoh fluida termampatkan adalah: udara, gas alam, dll. Persamaan Bernoulli untuk aliran termampatkan adalah sebagai berikut:
 {v^2 \over 2}+ \phi + w =\mathrm{konstan}
di mana:
\phi \, = energi potensial gravitasi per satuan massa; jika gravitasi konstan maka \phi = gh \,
 w \, = entalpi fluida per satuan massa
Catatan:  w = \epsilon + \frac{p}{\rho} , di mana  \epsilon \, adalah energi termodinamika per satuan massa, juga disebut sebagai energi internal spesifik.