Problem Solving

Interesting lecture on problem solving by Adam Savage (of Mythbusters).

F*** Grapefruit

Debt as a trigger for historical events

A very interesting talk by economic historian Niall Ferguson on how debt has effectively shaped history and the course of empires. Also some very good insight about the current economic situation and the impact it will have on the world geo politics in the coming decades. Video is quite long, about an hour.

Launch of the first solar sail powered space craft

… has been delayed. It is heading for Venus, when the weather clears up! [National Geographic]

Once in space, the cylindrical, 677-pound (307-kilogram) craft will separate from the rocket and spin itself to unfurl its roughly 46-foot-wide (14-meter-wide) solar sail.

First proposed in the 1920s, solar sails are large reflective membranes that allow a spacecraft to be pushed by radiation pressure from sunlight, negating the need for heavy onboard fuel. (Explore a time line of space travel milestones.)

"It's the space equivalent of a yacht sailing on the sea," said Yuichi Tsuda, deputy project manager for Ikaros. Like wind filling a boat's sails, particles of light—or photons—streaming from the sun bounce onto a mirrorlike aluminized solar sail.

As each photon strikes, its momentum is transmitted to the spacecraft, which begins to gather speed in the almost frictionless environment of space. A solar sail can eventually reach speeds five to ten times greater than a rocket powered by conventional fuels.

Ikaros is considered a hybrid, because the sail's membrane—itself just 0.0075 millimeters thick—sports thin-film solar cells for generating electricity, which will power Ikaros's high-efficiency ion-propulsion engines, Tsuda said.

NASA engineer Les Johnson views interstellar sail material. [Wikipedia]

Photoshop crash reports

Interesting …. Many more at ManiacalRage.net [Link]

 

The most useless machine ever .. in LEGO

What happens when you turn it on? A little hand appears and turns it off again.

Awesome AD

To the tax cheats. They’ve got the 1984 voice down.

Its not the banks, its the bankers

Good analysis on what creates the unhealthy risk appetite (and a suggestion near the end on how to possibly control it.) [Link]

I learned very early in my business career that the most important factor in managing a sales force is defining the comp plan. Salesmen are smart. They will quickly understand what the comp plan tells them to do and they will do it. You had better make sure that the comp plan tells them to do exactly what you want them to do! Bankers are super salesmen. Bankers are smart. Bankers do exactly what their comp plan tells them to do.

What does a Bankers comp plan tell him to do?

First, understand that bankers are playing with Other People’s Money (OPM). What if they lose it all? Well, it’s not their money. What if they invest it conservatively and make a modest return? They probably get to buy a midsize American car and a 2 bedroom house in a distant suburb. What if they gamble it on really high risk bets and they win? They buy a Bentley and a penthouse condo with a 360 degree view. Understand that, when bankers are playing with the OPM, the comp plan tells them to take huge risks. Heads I win, tails you lose! If I lose all your money I will just play again with someone else’s. There seems to be no end to the people who will line up for the privilege. If I soil one corporate platform I will just jump to another.

Many years ago, when the investment banks were partnerships - they played with their own money. The risk management responsibility was understood by everyone in the firm. It was THEIR money!! Then a really smart generation of managers figured out that they could sell the shares of the bank to investors. This was a blinding insight!!

Commitment

Stephen Hawking: How to build a time machine

Well, if any one has credibility when describing the design of a time machine, it has to be Stephen Hawking. He has written an article describing a few ways that time machines could be built. [Link]

 

Any kind of time travel to the past through wormholes or any other method is probably impossible, otherwise paradoxes would occur. So sadly, it looks like time travel to the past is never going to happen. A disappointment for dinosaur hunters and a relief for historians.

But the story's not over yet. This doesn't make all time travel impossible. I do believe in time travel. Time travel to the future. Time flows like a river and it seems as if each of us is carried relentlessly along by time's current. But time is like a river in another way. It flows at different speeds in different places and that is the key to travelling into the future. This idea was first proposed by Albert Einstein over 100 years ago. He realised that there should be places where time slows down, and others where time speeds up. He was absolutely right. And the proof is right above our heads. Up in space.

This is the Global Positioning System, or GPS. A network of satellites is in orbit around Earth. The satellites make satellite navigation possible. But they also reveal that time runs faster in space than it does down on Earth. Inside each spacecraft is a very precise clock. But despite being so accurate, they all gain around a third of a billionth of a second every day. The system has to correct for the drift, otherwise that tiny difference would upset the whole system, causing every GPS device on Earth to go out by about six miles a day. You can just imagine the mayhem that that would cause.

The problem doesn't lie with the clocks. They run fast because time itself runs faster in space than it does down below. And the reason for this extraordinary effect is the mass of the Earth. Einstein realised that matter drags on time and slows it down like the slow part of a river. The heavier the object, the more it drags on time. And this startling reality is what opens the door to the possibility of time travel to the future.

Right in the centre of the Milky Way, 26,000 light years from us, lies the heaviest object in the galaxy. It is a supermassive black hole containing the mass of four million suns crushed down into a single point by its own gravity. The closer you get to the black hole, the stronger the gravity. Get really close and not even light can escape. A black hole like this one has a dramatic effect on time, slowing it down far more than anything else in the galaxy. That makes it a natural time machine.

I like to imagine how a spaceship might be able to take advantage of this phenomenon, by orbiting it. If a space agency were controlling the mission from Earth they'd observe that each full orbit took 16 minutes. But for the brave people on board, close to this massive object, time would be slowed down. And here the effect would be far more extreme than the gravitational pull of Earth. The crew's time would be slowed down by half. For every 16-minute orbit, they'd only experience eight minutes of time.

Around and around they'd go, experiencing just half the time of everyone far away from the black hole. The ship and its crew would be travelling through time. Imagine they circled the black hole for five of their years. Ten years would pass elsewhere. When they got home, everyone on Earth would have aged five years more than they had.

Transocean Deepwater Horizon Explosion-A Discussion of What Actually Happened?

A good article about the recent oil platform explosion in the U.S. with lots of technical details and eye-witness accounts. [Link]

Witnesses state that the lights flickered on the Deepwater Horizon. Then a massive thud shook the vessel, followed by another strong vibration. Transocean employee Jim Ingram, a seasoned
offshore worker, told the U.K. Times that he was preparing for bed after working a 12-hour shift. "On the second [thud]," said Mr. Ingram, "we knew something was wrong." Indeed, something was very wrong.
Within a moment, a gigantic blast of gas, oil and drilling mud roared up through three miles of down-hole pipe and subsea risers. The fluids burst through the rig floor and ripped up into the gigantic draw-works. Something sparked. The hydrocarbons ignited. In a fraction of a second, the drilling deck of the Deepwater Horizon exploded into a fireball. The scene was an utter conflagration.