Quotulatiousness

April 25, 2015

There’s a reason SF writers tend to invent ways to travel interstellar distances quickly

Filed under: Books, Economics, Science, Space, Technology — Tags: — Nicholas @ 05:00

At Real Clear Science, Ross Pomeroy sings the praises of an early publication by the pre-Nobel academic Paul Krugman:

Paul Krugman is a Nobel Prize-winning economist, a respected professor at Princeton University, and an outspoken liberal columnist for the New York Times. But first and foremost, he is a huge nerd, and proud of it.

Back in the sweltering summer of 1978, Krugman’s geekiness prompted him to tackle a matter of galactic importance: the economics of interstellar trade. Then a 25-year-old “oppressed” assistant professor at Yale “caught up in the academic rat race,” Krugman crafted his “Theory of Interstellar Trade” to cheer himself up. Krugman’s jocularity is evident throughout the paper, which was published online in 2010, thirty-two years after he stamped it out on a typewriter. Early on in the article, he even pokes fun at his chosen profession:

    “While the subject of this paper is silly, the analysis actually does make sense. This paper, then, is a serious analysis of a ridiculous subject, which is of course the opposite of what is usual in economics”

The key problem with interstellar trade, Krugman writes, is time dilation. When objects travel at velocities approaching the speed of light — roughly 300,000 kilometers per second — time moves more slowly for them compared to objects at rest. (For a great explainer of this effect, which is tied to Einstein’s theory of special relativity, check out this video.) So the crew of a space-faring cargo ship might experience only ten years while thirty years or more might pass for the denizens of the planets they’re traveling between. How then, does one calculate interest rates on the cost of goods sold? Trading partners will undoubtedly be many light-years apart and trips will last decades, so this is a vital issue to resolve.

Since the speeds of vessels will undoubtedly vary, but both planets should be moving through space at close enough velocities where time dilation wouldn’t be a factor, Krugman contends that the interest costs should be tabulated based on the time shared by the two planets. But what about those interest rates? Won’t they differ? Not necessarily, Krugman argues. Competition should lead them to equalize amongst interplanetary trading partners.

Elasticity of Demand

Filed under: Economics — Tags: , — Nicholas @ 04:00

Published on 27 Jan 2015

How much does quantity demanded change when price changes? By a lot or by a little? Elasticity can help us understand this question. This video covers determinants of elasticity such as availability of substitutes, time horizon, classification of goods, nature of goods (is it a necessity or a luxury?), and the size of the purchase relative to the consumer’s budget.

Finnish divers binge on 200-year-old wine and beer

Filed under: Europe, History, Wine — Tags: , , , , — Nicholas @ 03:00

Perhaps “binge” isn’t quite the right word to use…

Finnish divers recently discovered several crates of champagne and beer from a sunken ship that had been at the bottom of the Baltic Sea for nearly two centuries. The experts carefully identified, researched, and analyzed the alcohol…then they drank it.

The divers discovered the wreck just south of Aaland, a Finland-controlled archipelago of some 6,500 small islands in the Baltic Sea. Inside the sunken schooner, they found 168 bottles of champagne and an undisclosed amount of bottles of beer. The ship itself likely dates back to the second quarter of the 19th century, making its cargo almost certainly the oldest alcoholic drinks in existence. By comparison, the oldest wines in private hands are only thought to date back to the very end of the 1800s.

This entire story is a good reminder of a basic scientific truth — when in doubt, start drinking the 200-year-old booze. The divers first discovered the champagne was drinkable when changing pressures caused the cork to pop off one of the bottles, and a diver decided to take a swig. He expected to taste seawater that had seeped into the bottle over the last 200 years — which raises very legitimate questions about just why he decided to take a sip in the first place — but was shocked to discover the wine still tasted fine.

H/T to Never Yet Melted, for linking to a story from 2010.

They called it “hardtack” for a good reason

Filed under: Food, History, Military — Tags: — Nicholas @ 02:00

An army may march on its stomach, as Napoleon is reputed to have said, but what filled that collective stomach might well turn our modern ones:

The origin of Hardtack’s name itself is a source of some disagreement. Many argue that it stems from the texture of the item combined with British sailor slang for food, or “tack.” Others say the term originated during the American Civil War. Some maintain that the name derives from the biscuit being “hard as tacks” – somewhat uninspired.

In a time before refrigeration, pasteurization, canning, or preservation through chemical additives there were only so many ways a food could be kept without spoilage. Salting and dehydrating foods was a relatively easy way to make them last. Baking cereal grains into a dense biscuit made for easy transport and a reduced risk of spoilage (although, as we will learn, vermin were a different story). Most importantly (especially for operational planning), it was cheap. A form of hardtack was given as rations to Roman armies under the name bucellatum and during the 16th Century, British sailors could expect a daily ration of 1 gallon of beer and 1 lb. of hardtack.

While hardtack was issued right up until World War I, the most recent and descriptive accounts of the food come from the American Civil War. Soldiers often referred to the biscuits as “worm castles” because all too often they would become home to maggots and weevils. One soldier recalled the sorry state of hardtack that he and his comrades were to consume:

    A brigade officer of the day called out sharply to some of our men as he passed along the line: “Throw that hard tack out of the trenches. Don’t you know, men, you’ve been told not to throw your rations in the trenches” Prompt to obey, the men threw out the hard tack, saying as they did, “We’ve thrown it out several times, sir, but it will crawl back.”

    When the hardtack wasn’t infested with insects, soldiers needed to soften the biscuits for consumption in a variety of ways, including whacking them with the butt of their rifles, soaking them in coffee, or softening them in water to then be fried in pork fat. Delicious.

QotD: Political speech and political thinking

Filed under: Media, Politics, Quotations — Tags: , , — Nicholas @ 01:00

In our time it is broadly true that political writing is bad writing. Where it is not true, it will generally be found that the writer is some kind of rebel, expressing his private opinions and not a “party line.” Orthodoxy, of whatever color, seems to demand a lifeless, imitative style. The political dialects to be found in pamphlets, leading articles, manifestoes, White papers and the speeches of undersecretaries do, of course, vary from party to party, but they are all alike in that one almost never finds in them a fresh, vivid, homemade turn of speech. When one watches some tired hack on the platform mechanically repeating the familiar phrases — bestial atrocities, iron heel, bloodstained tyranny, free peoples of the world, stand shoulder to shoulder — one often has a curious feeling that one is not watching a live human being but some kind of dummy: a feeling which suddenly becomes stronger at moments when the light catches the speaker’s spectacles and turns them into blank discs which seem to have no eyes behind them. And this is not altogether fanciful. A speaker who uses that kind of phraseology has gone some distance toward turning himself into a machine. The appropriate noises are coming out of his larynx, but his brain is not involved as it would be if he were choosing his words for himself. If the speech he is making is one that he is accustomed to make over and over again, he may be almost unconscious of what he is saying, as one is when one utters the responses in church. And this reduced state of consciousness, if not indispensable, is at any rate favorable to political conformity.

In our time, political speech and writing are largely the defense of the indefensible. Things like the continuance of British rule in India, the Russian purges and deportations, the dropping of the atom bombs on Japan, can indeed be defended, but only by arguments which are too brutal for most people to face, and which do not square with the professed aims of the political parties. Thus political language has to consist largely of euphemism, question-begging and sheer cloudy vagueness. Defenseless villages are bombarded from the air, the inhabitants driven out into the countryside, the cattle machine-gunned, the huts set on fire with incendiary bullets: this is called pacification. Millions of peasants are robbed of their farms and sent trudging along the roads with no more than they can carry: this is called transfer of population or rectification of frontiers. People are imprisoned for years without trial, or shot in the back of the neck or sent to die of scurvy in Arctic lumber camps: this is called elimination of unreliable elements. Such phraseology is needed if one wants to name things without calling up mental pictures of them.

George Orwell, “Politics and the English Language”, 1946.

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