Akbar's journal

Jumat, 17 Juli 2015

First day

Ok, it's the first ied fitr day, it's friday, and i ate a lot this day
Well, i want to tell you some stories

Well, at the morning, i just wake up and do what shall i do in the morning
And then wait till' 10 am, wait till first group of my big family member
Well, the next is not too important
And, we pass all the event till 12, after friday pray
Me, and my family come to the other family member house
And, the road is...
What can i say, quiet, almost empty
There's only a few car around me

And i love that kind of situation
Make me want to write the first project again

Ok, skip all of that things till nite, when i play KSP
And, other family member come
At 19.30 (i think)
And, well, nothing special, to be honest, i just spend the whole time reading about kuiper belt, TNO's, and oort cloud
Well, i've just being a nerd again

Ok, i need to go, need some rest, tomorrow, i gonna go somewhere with my bike or playing KSP
Bye!
xoxo (nobody tell me why xoxo mean kiss and hug, so, i search it for myself and found the answer)

Kamis, 16 Juli 2015

Ied Mubarak All!

Well, it's 20.54 at night, and 16/07/2015
And, it's the last day of ramadhan!
*uraaa
Well, tomorow, there will be many foods here, in my house, and when i'm bored with the food here
I can go to my neighbour or other family member house, and eat!
And, there is a possibility to be a rich person tomorow

Ok, it's a little bit loud right here, and when i ask one of my friend, she said, it's loud too there
the sounds of firework, firecracker, and other stuff (Including takbir) are here, i'm afraid that one of of that sounds around me is a military class explosion (?)
Well, if you want some kind of artilery battle feeling, you can wait till' the new year, and come to the nearest firework party, but , dont get too close, get a little bit far (500m maybe work), and look for a quiet place, wait till 00.00, and feel it

Ok, i'm talking too much shit now
I need to continue my kerbal space program rocket
Well, if you think, kerbal space program is only an ordinary game, i'll proof you are wrong
I will tell you how to orbit

First, you need to adjust your orbiting speed
The relation between orbital speed and acceleration is given by the formula:

a={\frac {v^{2}}{r}},

where a is the acceleration due to gravity, v is the horizontal speed, and r is the radius of orbit.
Of course, gravity varies depending on your distance from the planet, so we also need the following formula to determine a based on your altitude:

a=g\left({\frac {R}{R+h}}\right)^{2},

where g is the acceleration due to gravity at sea level (9.807 m/s²), R is the radius of Kerbin (600 km), and h is the altitude of your orbit.
Note: Since the radius of your orbit r is equal to the radius of Kerbin R plus your altitude h, we can substitute R + h for r.
Now we have two expressions for a, so we set them on opposite sides of an equation and simplify:

{\begin{aligned}g\left({\frac {R}{(R+h)}}\right)^{2}&={\frac {v^{2}}{r}}\\g\left({\frac {R}{(R+h)}}\right)^{2}&={\frac {v^{2}}{R+h}}\\g{\frac {R^{2}}{(R+h)^{2}}}&={\frac {v^{2}}{R+h}}\\g{\frac {R^{2}}{R+h}}&=v^{2}\\v^{2}&=g{\frac {R^{2}}{R+h}}\\v&={\sqrt {g{\frac {R^{2}}{R+h}}}}\\v&=R{\sqrt {{\frac {g}{R+h}}}}\\\end{aligned}}

Finally, substituting known values for g and R,

v=600\ 000\ {\mathrm {m}}{\sqrt {{\frac {9.807\ {\mathrm {m}}/{\mathrm {s}}^{2}}{600\ 000\ {\mathrm {m}}+h}}}}

And then, the orbital period
From the basic mechanics formula:

d=vt

We know v from the above, and d is simply the circumference of a circle with a radius equal to your orbital altitude plus the radius of Kerbin:

t=2\pi {\frac {600\ 000\ {\mathrm {m}}+h}{v}}

And, last but not least, orbital equation
For this section it is assumed that the craft in question is orbiting a particular body and is a lot smaller than the body that it is orbiting. Other then in the general orbital equation and the energy equation, the orbits are assumed to be bounded orbits completely within the body's sphere of influence and no others. This section also assumes that classical physics applies in the game. All distances and radii are from the center of the body being orbited and the sea level radius of the body needs to be added to the altitude given in game to recover the values here. The section uses the standard gravitational parameter

\mu =GM

which

G

is Newton's Gravitational Constant and

M

is the mass of the body that is being orbited. From here on out

m

will refer to the mass of the craft.
When the craft is orbiting a body, the distance between the craft and the body is given by the equation

r(\phi )={\frac {l^{2}}{\mu m^{2}}}{\frac {1}{1+\epsilon cos\phi }}

where

l

is the angular momentum of the craft,

\epsilon

is the eccentricity of the orbit, and

\phi

is an angle parameter for the orbit.

\phi

runs from

0\deg

360\deg

l=m\cdot r\cdot v

at apoapsis or periapsis, and

\epsilon \geq 0

. When

\epsilon <1

the orbit is bounded and is an ellipse and when

\epsilon \geq 1

the orbit is unbounded. At

\phi =0\deg

the craft is at the periapsis and at

\phi =180\deg

the craft is at the apoapsis. At periapsis,

r_{p}={\frac {l^{2}}{\mu m^{2}}}{\frac {1}{1+\epsilon }}

and at apoapsis,

r_{a}={\frac {l^{2}}{\mu m^{2}}}{\frac {1}{1-\epsilon }}

.
The semimajor axis is

a={\frac {l^{2}}{\mu m^{2}}}{\frac {1}{1-\epsilon ^{2}}}

and the semiminor axis is

b={\frac {l^{2}}{\mu m^{2}}}{\frac {1}{{\sqrt {1-\epsilon ^{2}}}}}

\epsilon ={\frac {{\sqrt {a^{2}-b^{2}}}}{a}}

Given the results for

r_{p}

and

r_{a}

above,

l^{2}=2\mu m^{2}{\frac {r_{p}r_{a}}{r_{p}+r_{a}}}

and

\epsilon ={\frac {r_{a}-r_{p}}{r_{p}+r_{a}}}

thus

r(\phi )=2{\frac {r_{p}r_{a}}{r_{p}+r_{a}+(r_{a}-r_{p})cos\phi }}

The velocity for an object in elliptical orbit about a much larger object is

v={\sqrt {\mu ({\frac {2}{r}}-{\frac {1}{a}})}}={\sqrt {\mu {\frac {r_{p}^{2}+r_{a}^{2}+(r_{a}^{2}-r_{p}^{2})cos\phi }{r_{p}r_{a}(r_{p}+r_{a})}}}}={\sqrt {2\mu {\frac {r_{p}+r_{a}-r}{r(r_{p}+r_{a})}}}}

.
The energy for an object in orbit is

E={\frac {\mu ^{2}m^{3}}{2l^{2}}}(\epsilon ^{2}-1)={\frac {\mu m(r_{p}+r_{a})}{4r_{p}r_{a}}}(\epsilon ^{2}-1)=-{\frac {\mu m}{r_{p}+r_{a}}}

.
One should note that for bounded orbits, the energy is negative and for escape orbits, energy is non-negative.
The orbital period is

\tau ={\sqrt {{\frac {4\pi ^{2}}{\mu }}a^{3}}}={\sqrt {{\frac {\pi ^{2}(r_{p}+r_{a})^{3}}{2\mu }}}}

.
Let

r_{{c,1}}

and

r_{{o,1}}

be the two apsides of a given orbit and let a craft execute a burn imparting a specific

\Delta v

all at the single point in time the craft is at

r_{{c,1}}

. For this problem

\Delta v

can be either positive or negative. If it is positive then the thrust is to speed up the craft but if it is negative the ture delta v is the oppositie of that in the problem but the thrust is to slow down the craft. This problem assumes that the thust is in the same or opposite direction of travel and is not enough to reverse the craft. The new orbit will have apsides of

r_{{c,2}}

and

r_{{o,2}}

with

r_{{c,2}}=r_{{c,1}}

.
The speed of the craft before the burn is

v_{1}={\sqrt {2\mu {\frac {r_{{c,1}}+r_{{o,1}}-r_{{c,1}}}{r_{{c,1}}(r_{{c,1}}+r_{{o,1}})}}}}={\sqrt {2\mu {\frac {r_{{o,1}}}{r_{{c,1}}(r_{{c,1}}+r_{{o,1}})}}}}

.
The speed of the craft after the burn is

v_{2}=v_{1}+\Delta v={\sqrt {2\mu {\frac {r_{{c,2}}+r_{{o,2}}-r_{{c,2}}}{r_{{c,2}}(r_{{c,2}}+r_{{c,2}})}}}}={\sqrt {2\mu {\frac {r_{{o,2}}}{r_{{c,1}}(r_{{c,1}}+r_{{o,2}})}}}}={\sqrt {2\mu {\frac {r_{{o,1}}}{r_{{c,1}}(r_{{c,1}}+r_{{o,1}})}}}}+\Delta v

which yields

\Delta v={\sqrt {{\frac {2\mu }{r_{{c,1}}}}}}({\sqrt {{\frac {r_{{o,2}}}{r_{{c,1}}+r_{{o,2}}}}}}-{\sqrt {{\frac {r_{{o,1}}}{r_{{c,1}}+r_{{o,1}}}}}})

and

r_{{o,2}}=r_{{c,1}}{\frac {r_{{c,1}}({\sqrt {2\mu {\frac {r_{{o,1}}}{r_{{c,1}}(r_{{c,1}}+r_{{o,1}})}}}}+\Delta v)^{2}}{2\mu -r_{{c,1}}({\sqrt {2\mu {\frac {r_{{o,1}}}{r_{{c,1}}(r_{{c,1}}+r_{{o,1}})}}}}+\Delta v)^{2}}}=r_{{c,1}}{\frac {r_{{c,1}}v_{2}^{2}}{2\mu -r_{{c,1}}v_{2}^{2}}}

Well, still thinking that game give you nothing?
Think again

Well, i want to go now
continue build some rocket
Bye!
xoxo (well, is there anyone know why "xoxo" means hug and kiss?)

Ps. Again, Ied Mubarak All!

headache

Ok, i've got some headache now
For an unknown reason
I hope, my three imaginary friends are here now
And, i'm hoping for Froze and Robo too

Cut this
I've just found something on my facebook wall
A children, that psychologically immature
Already have a girlfriend
*crying internally
And, one of his friend, swear at me (with pejorative meaning) when i post some sarcastic meme
I....
I feel, so weird right now
I live in the middle of the gap between the 20th century generation, and the 21st generation
A gap, where i can play gameboy on a roadside rental, while holding an android smartphone
Where i can play gobak sodor, when hearing some dubstep (i'm not a bad guy just because i hear some dubstep right?)

Well, lets talk bout something else
Well, i've just re-read my project surabaya first draft
And, crap, its the worst

Well, i know, first draft always the worst...

Hmm, is there anything else to talk?
No?
Ok, it's time for me to go!
LOL (acronym for Lots Of Love)
Bye!
xoxo

Ps. This is the last day of ramadhan, tomorow is ied fitri, and i will post intensely tomorow!

Rabu, 15 Juli 2015

darn it

Darn, a slang term people used to say damn
Some says its more polite
But, crap that
I just want to fill this blog with a post

Umm, sorry, i'm a little bit tantrum there...
I...

Oh, fak this
My mom told me to sleep again
This is the reason why i cant post yesterday
Well, my mom prevent me to do my hobby, even if its the positive one, better than smoking weed or dringking some beer

Bye dude
Hope frost beside me
xoxo

Selasa, 14 Juli 2015

no goddamn idea

Ok, i have no goddamn idea now
With a mom who preventing me to stay awake...
Well, there will be a guest coming at 11
And i know, if i sleep now, i will miss it...
That was a goddamn preschool logic

Ok, stop using goddamn now
I still have no idea, and its 14 july

Oh darn it, i want to talk with someone
But, there is no one geeky enough to talk with me now...
How about my imaginary friend?
Ok, even if i have an imaginary friends, i still cant talk with em'
I mean, c'mon, even the dumbest guy on earth know that talking with air is insane

Ok, this post is swearing overload
I need to go cake
I hope frost is here now
xoxo

Senin, 13 Juli 2015

Always in the wrong time

Ok mate, now, i want to tell you something that happen last night
I've just discovered something, really nice, and not nice

Last night, i've just continue to write some crime story, in indonesian
And, for an unknown reason, i can't stop till i really tired
Ok, that is the nice one, and the other is, not the nice one
That, i forget how to write with 3rd person POV
Really, it feels like write something, that not flowing
I mean, a story is meant to be flowing
Ok, my story is still moving forward, but, it feels like lag, i mean, you just jump from a part to another
And, when i changed it with 1st person POV, my story flow freely
Ok, that is happen, because i wrote this blog with 1st person POV

Let's change topic
I can write a lot of things last night, it feels like, there is a lot of idea, waiting to be writed in my mind
Sometimes its happen, oh, its actually, always happen
And, its routine, always happen everyday, almost in the same time
And the time is...
Midnight...
Well, that is why i cant finish my project soon, because, i simply aren't allowed to write at night
And, yeah, my idea always flow freely when there is no adult around me
Inspiration always come to me when im tired, and want to sleep
And, idea almost always come in the wrong time

Well, i'm tired now
Need to sleep mate
xoxo

Minggu, 12 Juli 2015

calming

Morning, my friend, i just wanna tell you
That i almost vomit this morning
Well, i eat too much, a box of rice, chicken, egg, and else at 1 am, continue with batagor, and another box of rice at 3 am
But, that's not the point i want to tell you this morning

That, i feel calmed
By the environment, by the small cluster of cloud that pass me with a high speed, with a red magenta gradation that come from the east, the nature ambience, and else, this post is not enough for me to describe it all

I look at the sky, and the only thing i can see, is color gradation between pale blue and light grey, with some dark grey cloud hanging above me
I bet, this cloud contain ash, and material from raung eruption

Umm, maybe, it's time to go mate
For the first time, i'm gonna close a post on this blog with a quote

A fake person, have an image to maintain
A real person, just don't care
-i really dont know who said it

Ciao!
xoxo