Um vulcão ou uma explosão nuclear são capazes de derrubar uma floresta inteira, enquanto uma tempestade ou um nevão apenas são capazes de arrancar do chão algumas árvores. O furacão Sandy derrubou mais de 8000 árvores em Nova York e mais uns tantos milhares nos arredores.
“The first thing to know is that all trees have the potential to fail at some level of force from wind, snow, ice, either singly or in combination. One main reason, all three experts agree, is the phenomenon known as “windthrow” which uproots a tree. The tree trunk acts as a lever and so the force applied to the roots and trunk increases with height. Taller trees are more susceptible to windthrow. The roots of trees can extend 1-2.5 times the radius of the branches and many urban areas do not allow this extensive development, the problem lies mostly with trees that have been developed around and had roots cut, crushed or torn in the process. There may be ensuing decay.” Este e outros pormenores sobre a árvore e a floresta podem ser lido na Scientific American.
A derrapagem nas receitas do Estado deve-se a «efeitos não lineares de natureza cíclica e/ou efeitos não discricionários». Alguem aqui percebe de árvores?!
Facebook and Groupon are struggling on the stock market. Skeptics are already counting down the days until the next tech bubble bursts.
Both companies had certainly expected a different initial public offering. Investors were eager to get their hands on shares from the two tech companies, and had to watch as stock prices plummeted. Several Dutch pension funds lost millions. For the start-up industry, this was an unwelcome development, now, new founders must persuade investors that the projections they make for their company aren’t overly optimistic and unrealistic.
The gold-rush fever that characterized the dot.com industry of ten years ago is gone. And hopefuly never to come back
60-Second Adventures in Economics is a fast and fun way to acquaint yourself with a few of the fundamental ideas in economics. «(…) like an overzealous triathlete, you can’t do all three at once»
Fanny Kemble meets an early steam locomotive on the Liverpool-Manchester railway, Aug. 25, 1830. «We were introduced to the little engine which was to drag us along the rails. She consisted of a boiler, a stove, a platform, a bench, and behind the bench a barrel containing enough water to prevent her being thirsty for fifteen miles, the whole machine not bigger than a common fire engine. She goes upon two wheels, which are her feet, and are moved by bright steel legs called pistons; these are propelled by steam, and in proportion as more steam is applied to the upper extremities (the hip-joints, I suppose) of these pistons, the faster they move the wheels; and when it is desirable to diminish the speed, the steam, which unless suffered to escape would burst the boiler, evaporates through a safety valve into the air. The reins, bit, and bridle of this wonderful beast, is a small steel handle, which applies or withdraws the steam from its legs or pistons, so that a child might manage it. The coals, which are its oats, were under the bench, and there was a small glass tube affixed to the boiler, with water in it, which indicates by its fullness or emptiness when the creature wants water, which is immediately conveyed to it from its reservoirs. There is a chimney to the stove, but as they burn coke there is none of the dreadful black smoke which accompanies the progress of a steam vessel. This snorting little animal, which I felt rather inclined to pat, was then harnessed to our carriage, and Mr. Stephenson having taken me on the bench of the engine with him, we started at about ten miles an hour.»
“It was like certain dinners I remember from the war. There was much wine, an ignored tension, and a feeling of things coming that you could not prevent happening.” ― Ernest Hemingway.
“Greece is part of the eurozone and I would like it to remain in the eurozone,” Merkel said during a press conference with Greece’s Prime Minister.
Merkel noted that she and France’s Francois Hollande, whom she met Thursday, have taken the same approach with respect to Athens. “We both want Athens to remain in the euro but we also told you that you must comply with the commitments”.
“Greece will stick to its commitments and fulfil its obligations. In fact this is already happening,” replied Antonis Samaras.