5/5/2023 0 Comments Abacus calculator![]() More details about this so called Electric Calculator are needed for more accurate answers. In the early grades, students can simply use the abacus to represent quantities and numbers, building number sense. So, in a sense, the game is rigged and the person with the mechanical calculator had lower chances of winning.įrom the video you can understand why the mechanical calculator was defeated by the abacus. This online abacus tool allows students to model all sorts of operations. There also seem to be many people using Abacus, but a single person using the mechanical calculator. The abacus in this video seems to take less work than the mechanical calculator and I don't think it's such a good idea to "force" the mechanical calculator to work at high speeds, because they are suseptible to wear and tear of the gears etc. The calculator seems to be mechanical, needing a lot more work than a modern electric calculator. Here is a video of a contest at 1967 between an abacus and a calculator. It might have been something like a vacuum tube based computer which would be really hard to input to. It might have been a mechanical calculator with a little help from Electricity. Also, notice that it says Electric and not Electronic. So, how could there be a transistor based calculator. The transistor hadn't been invented at the time of this test. Most people seem to be ignoring the fact that the calculator of 1946 is not like the modern calculator. Lots of mental arithmetic tires the brain, far more (I'd wager) than pushing beads up and down. (With drumming and piano playing, this frees the mind to concentrate on expressiveness and musicality.) As with any physical skill, endless practice turns mental operations into reflex actions. The activity demands little of memory, or rather, it's mostly muscle memory. Compare addition with the abacus to drumming or playing the piano. Ultimately, the soroban is not as much about mental dexterity as it is about mechanical skill, says soroban user Yannic Piché. The Wired article you link to says something similar: So we're slower at basic arithmetic, but we know numbers. You don't have to memorize 9+7=16 you just know that when you add 9, you push a ten's bead up and pull a one's bead down. With the abacus, you don't have to memorize a lot of arithmetic combinations all you have to do is to learn to push the little beads up and down. I realized something: he doesn't know numbers. Feynman remarked, "What he didn't realize was, the harder the problem, the better chance I had." Feynman's explanation: But Feynman almost matched him with multiplication, tied with division, and mopped the floor for cube root problems. Feynman lost with addition and subtraction, even when both contestants were given the numbers written down. Why don't you go over and challenge the customer over there?"įeynman of course was the customer. The waiters didn't want to lose face, so they said, "Yeah, yeah. He started to talk to the waiters, and challenged them: He said he could add numbers faster than any of them could do. I had seen him before, wandering around he was trying to sell abacuses. Feynman!įeynman was sitting in a restaurant, whenĪ Japanese man came into the restaurant. However, it's interesting that Feynman had a similar experience, as recounted in Surely, You're Joking, Mr. For this reason, in addition to moisture protection according to DIN 4108-3 (in German), a drying reserve in accordance with DIN 68800-2 (in German) is required, which should also allow harmless drying of unintentionally penetrated moisture.With this kind of "why?" question, one can only speculate. Moisture protection in wood structures is particularly important. If the water vapor accumulates on a cold layer, condensation is likely to occur. ![]() Because the outer, colder layers can only contain very little water vapor, it must be ensured that the water vapor escapes as easily as possible from the outside. This is why water vapor diffuses through the component from the inside to the outside. In winter the warm room air contains more moisture than the cold outside air. At this point, the following simplification is sufficient: The article Wasserdampfdiffusion und feuchte Wände (in German) explains how moisture and mold can occur. Therefore, the U-value calculator examines your insulation for potential moisture problems. Moist and moldy walls are the nightmare of many builders. More detailed information can be found on the left-hand side of the screen using the buttons U-value, humidity, heat, etc.įor commercial usage, calculations are made according to DIN EN ISO 6946 (U value), DIN 4108-3 (moisture protection) and DIN 68800-2 (drying reserve). The main results are displayed at the bottom of the screen. ![]() To insert wooden beams into an insulation layer. ![]()
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