I make it even simpler: People who should like inflation: -People who owe money (at a fixed interest rate) People who should oppose inflation: -People who have lent money (at a fixed interest rate)

"Given a long enough life, cancer will eventually kill you â" unless you die first of else" Isn't that true of everything: "Given a long enough life, [tetanus] will eventually kill you â" unless you die first of something else "

There is a theory that antimatter is gravitationally repulsive to matter but attractive to itself. There is also a possibility that some galaxies are made up of antimatter. If this were true and the distribution of matter and antimatter were fine enough so that antimatter galaxies were in the observable universe then a pattern should emerge in the large scale structure of the universe. The pattern of filaments and voids would have two sets of filaments that would never connect. In other words: if you modeled galaxy clusters as nodes and filaments as edges there would be two separate graphs that would never be attached. This would be relatively easy to find (or rule out) in current survey data. Has anyone done this? (In hopes of not sounding like a crank; I am aware of the counter evidence of antimatter galaxies. Namely the lack of gamma radiation caused by annihilation. But that's no reason more counter evidence could not be added to that pile.)

The gas tax is an extremely regressive tax. That means it is a tax that disproportionately taxes the poor. For example If I am a CEO that makes 800 times my workers do I buy 800 times as much gas? Roads should be paid for by progressive income taxation.

The problem is not the atmosphere. Getting to space is relatively easy. Getting to orbital velocity is the hard part. The crux of the problem is the exponential nature of the rocket equation.

The way I see it there are three hurdles to getting a self sufficient colony going. Any solution will probably require combination of advancement in several of the following areas.

1. Funding. Anyone who has seen "The right stuff" knows it's funding that makes the rockets go up. In this category there are two options for this.
    1a. Government funding. This requires political will. The only way I see this happening is if two large powers are competing like in the cold war. Until that happens people would rather devote there production possibilities frontier to penis enhancing sports cars and episodes of jersey shore. But if we really wanted to we could probably make a colony in the next 15 years for about 10% of an Iraqi invasion.
    1b. Philanthropy. Lets face it the funds of the private sector pale in comparison to government funding. This might work however with substantial improvements in the other two categories.

2. Lowering the mass necessary for self sufficiency. According to a NASA study "Advanced Automation for Space Missions" A semi-self sufficient moon colony could be started with 100 tons. (This would still require supply missions of hard to manufacture items like microprocessors and tool heads.)

3. Lowering the cost to orbit. There seems to be several solutions to this.
    3a. Conventional chemical rockets: The big improvement that needs to be made here is re-usability. Rocket fuel accounts for less than 1% of the cost per launch.
Space X is making some headway in this department. There current quoted price is in the $3.7million/ton to LEO range. With reusable designs an improvement in cost by a factor of 10 seems plausible. This puts a colony in the $10billion range within reach.
    3b. Other more exotic orbital launch systems(nuclear light-bulb, launch loop, space elevator ..etc) would require fairly large R&D budgets/infrastructure investments but could bring down costs to the $10k/ton range quite feasibly.

The competing agency FARPA is developing competitor to the LS3 technology. The name for this project is the Military Utility Logistics Engine. The stats are about the same except:
MULE has a payload of only 200lbs
MULE is quieter
MULE is capable of in situ resource utilization simplifying logistics
MULE is capable of doubling as a food source.
MULE's per unit cost is .01% of LS3 technology.

FARPA is also working on a more advanced project known as DONKEY, that will have self replicating abilities. Unfortunately this project is still in the early development stages.

When asked about the cost discrepancy between the $5,000,000,000 LS3 project vs the much more cost effective $500 MULE project, Congressmen Porkbarrel, R, MA replied: "I'm sorry I cant hear you over the sound of all this bribe money"

Here is a link to an early prototype of LS3:
http://www.youtube.com/watch?hl=en-GB&gl=NZ&v=VXJZVZFRFJc

Unfortunately starvation is not a motivator for the people who most influence the global economic system. Profit is the motivator.

If your a CEO of a motorcycle company you should know something about motorcycles If your CEO of a Twinkies factory you should know something about baking.

Baitin' is what I do for entertainment too.

William Hung as sushi-k

Take the case of throwing a baseball. This is case 2 from parent

Assume that the magnitude of the drag on the ball is proportional to the square of its velocity. Also, assume that the magnitude of the gravitational force is constant. You get the following set of differential equations:

x''(t)*m=A * (x'(t)^2+y'(t)^2) * cos(theta)
y''(t)*m=A * (x'(t)^2+y'(t)^2) * sin(theta) + g * m
theta=arctan(y'(t)/x'(t))

Where:
x(t) is the horizontal position of the ball at time t
x'(t) is the horizontal velocity of the ball
x''(t) is the acceleration
y(t) is the vertical position of the ball
(x'(t)^2+y'(t)^2) is the square of the velocity
theta is the angle of travel above the horizontal
m, A and g are constant over time*

*
A=-1/2*drag coefficient*cross sectional area of ball*air density
m is the mass of the ball
g is acceleration due to gravity

"We don't have mistakes here, we just have happy accidents."-Bob Ross

http://www.youtube.com/watch?v=8mA4HYTO790

They should at least have a graph that shows the mass distribution from there model compared to a mass distribution from the luminosity distribution.

The paper linked in the summary is essentially a rehash of this written in 2008:
http://www.mat.unimi.it/users/carati/pdf/atenemissing.pdf
This article essentially states that the far field gravitational effects of distant galaxies are not negligible. This is the essential meat of the idea.

From the article linked in the summary:
"In the literature, there are several papers which illustrate different ways in which the distribution of matter can be estimated, starting for example from the measured distribution of luminosity of the galaxies. We take instead the simpler path which consists in assuming a functional form for [local gravitational potential], with a minimal number of parameters and then trying to determine these parameters by a best fit with the observed rotation curves."

This part really bugs me. Why does the author completely ignore the luminosity distribution of the test galaxies. At the very least this means that all the pretty graphs you see when scrolling through the pdf are misleading.