Drake Equation: Solving the Probability of Extraterrestrial Civilizations

[Orion1]

Drake equation Solved...

Drake equation:
$$N_c = R_0 f_p n_e f_1 f_i f_c L_t$$

$$N_c = \frac{R_0 f_p n_e f_1 f_i f_c N_s}{R_e}$$

$$N_u = N_g R_0 f_p n_e f_1 f_i f_c L_t$$

$$N_u = \frac{N_g R_0 f_p n_e f_1 f_i f_c N_s}{R_e}$$

R₀ = 4 stars*yr^-1
f_p = (105/145)
n_e = (1/105)
f₁ = (1/128)
f_i = (1/13.6*10^6)
f_c = 1
N_s = 13.6*10^6 global species
R_e = 8.76*10^3 species*yr^-1 (hr^-1)
L_t = (N_s/R_e) = 1552.511 yrs

N_g = 1.425*10^7 galaxies/Universe

(R_e = hr^-1):
N_c = 2.436*10^-8 civilizations/galaxy
N_c^-1 = 4.103*10^7 galaxies/civilization
N_u = (N_c* N_g) = 0.347 civilizations/Universe

(R_e = dy^-1):
N_c = 5.848*10^-7 civilizations/galaxy
N_c^-1 = 1.709*10^6 galaxies/civilization
N_u = (N_c* N_g) = 8.337 civilizations/Universe

(R_e = mo^-1):
N_c = 1.778*10^-5 civilizations/galaxy
N_c^-1 = 5.621*10^4 galaxies/civilization
N_u = (N_c*N_g) = 253.584 civilizations/Universe

(R_e = yr^-1):
N_c = 2.134*10^-4 civilizations/galaxy
N_c^-1 = 4684.615 galaxies/civilization
N_u = (N_c* N_g) = 3043.017 civilizations/Universe

Extra-civilization Range:
$$r_c = \sqrt[3]{ \frac{3 V_u}{4 \pi N_u} }$$

(R_e = hr^-1):
r_c = 25.060 BLy

(R_e = dy^-1):
r_c = 8.687 BLy

(R_e = mo^-1):
r_c = 2.783 BLy

(R_e = yr^-1):
r_c = 1.215 BLy

N_c - civilizations/galaxy
N_u - civilizations/Universe
R₀ - galaxy stellar formation rate
f_p - stellar planetary fraction
n_e - planetary bioecology
f₁ - bioecological genesis
f_i - Intelligence fraction
f_c - Intelligence communication
N_s - total global species population
R_e - total global species extinction rate
L_t - global extinction lifetime
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All non-observable values rejected.
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Reference:
http://www.obspm.fr/encycl/catalog.html
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[Labguy]

"How many alien civilizations are capable of contacting us? In 1961, radio astronomer Frank Drake presented an equation designed to estimate that number on the basis of seven assumptions. For now, the Drake Equation tells you more about your own views on life in the universe than about scientific fact."

Reference:
http://www.msnbc.com/modules/drake/default.asp

The "Drake Equation" was based on assumptions made by one man. Anyone else can make assumptions, but mine would be no more or less "accurate" than Drake's. With the key word being assumption, there is so much to be variable that I don't think that it actually deserves to be called an equation. If it is assumptions, there is no equation to solve. Just my current opinion.