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Posts tagged with engineering

[I]t is … anachronistic to apply the term artist with its modern connotation to Leonardo [da Vinci]. Artists in the sense that we understand and use the word, meaning practitioner of fine art, didn’t exist in Leonardo’s time. It would be more appropriate to use the word artisan in its meaning of craftsman or skilled hand worker.

In the historical literature ∃ a perfectly good term to describe Leonardo and his ilk, Renaissance artist-engineer, whereby one can actually drop the term Renaissance as this profession already existed in the High Middle Ages before the Renaissance is considered to have begun.

[T]he artist-engineers were … regarded as menials. An artist-engineer was expected to be a practical mathematician, surveyor, architect, cartographer, landscape gardener, designer and constructor of scientific and technical instruments, designer of war engines and supervisor of their construction, designers of masks, pageants, parades and other public entertainments oh and an artist.

The … polymath … that everybody raves about when discussing Leonardo … actually … perfectly normal … any Renaissance artist-engineer—the only difference being that Leonardo was better at nearly all of them than most of his rivals.

As far as his dissections and anatomical drawings are concerned these belong to the standard training of a Renaissance artist-engineer—the major difference here being that Leonardo appears to have carried these exercises further than his contemporaries and his anatomical sketches have survived whereas those of the other Renaissance artists have not.

Having denied Leonardo the title of artist I think it is only fair to point out that it was the generation to which Leonardo belonged who were the first to become recognised as artists rather than craftsmen and in fact it has been claimed that Raphael was the first artist in the modern sense of the word….

[an exhibition on da Vinci] emphasises the few occasions where Leonardo drew something new or unexpected whilst ignoring the vast number of scientifically normal or often incorrect drawings, thereby creating the impression that his anatomical drawings were much more revolutionary than they in reality were. Also whilst the drawings published by Vesalius in his De fabrica in 1543, i.e. a couple of decades after Leonardo’s death, are possibly not quite as good artistically, as those done by Leonardo, they are medically much more advanced.

Thony Christie (@rmathematicus)

(Source: thonyc.wordpress.com)




Diamond Mining Complex by Laura del Pino
via planetaryfolklore, drawingarchitecture

hi-res




  • soft robots, modelled after octopi, made of elastimers
  • ubiquitous biological battery: a cell = a bag of hydrocarbon=lipid=water-insoluble with more potassium on the inside and more sodium on the outside




Building a railway through “the roof of the world” (Tibet).

  • A clever low-low-tech solution to the problem of ground’s freezing & thawing messing up your hard structure. (Also a clever low-tech, but not low-low-tech solution.)
  • Specific numbers that matter a lot: how many days do you need to stop at what altitudes on your way up to work at 5000 metres (15,000 feet) above sea level?

National Geographic:-Megastructures-Extreme Railway (por Simon Peter)




jkottke:

This video is 13 minutes of traffic accidents in Russia and totally amazing.

  1. Show this to your teenagers before they take the wheel. If it doesn’t scare the p*ss out of them—or even worse, if it excites them—no more Grand Theft Auto and hide the car keys.
  2. Next time you complain about public services, boring orderliness and “safety first”, the desireability of risk, Panglossian everything-optimal economics, or forget how relatively safe you are on your German freeways, …. watch this.

    As someone else remarked (can’t remember the source), the difference between Somalia and the USA is the stuff everybody in the US completely forgets is even possible.
  3. Notice how many of the accidents are caused by people trying to zoom ahead of everyone else—off the side of the road, cutting down a tree without noticing it will land on somebody else, trying to pass on the left or on the right or across the lane. Is your time really that important relative to everyone else’s, people?
  4. Assumptions. You think you can make assumptions, like that someone won’t fell a tree on your head, or a military jet won’t fly over your head, that someone won’t spill military equipment near you, or that people from the other lane (or off the road) won’t drive completely orthogonal and attack your car. Sometimes those assumptions are wrong.
  5. How many of these people do you think actually accepted the blame on themselves for their reckless actions?

via @Alea_, @felixsalmon




As to longitude, I declare that I found so much difficulty in determining it that I was put to great pains to ascertain the east-west distance I had covered. The final result of my labours was that I found nothing better to do than to watch for and take observations at night of the conjunction of one planet with another, and especially of the conjunction of the moon with the other planets….

After I had made experiments many nights, one night, the twenty-third of August 1499, there was a conjunction of the moon with Mars, which according to the almanac was to occur at midnight or a half hour before. I found that…at midnight Mars’s position was three and a half degrees to the east.

Amerigo Vespucci

Good gosh. Can you imagine having travelled so far on the globe—without a swift means of return, of course—that you literally had no idea where you were?

And what’s more, science to save you. You can’t ask anyone around you for the answer. Many of the people around you not only have never heard of Europe, but can’t even conceive of such a thing.

Nobody knows the answer. ∄ books that purport to have the answer. ∄ communication channels back to home. You’re all alone, mentally. To figure out what’s going on all you have to go on is reason and facts. And if you get the answer right, whom are you going to tell?

(Source: Wikipedia)




People think mathematicians are brilliant because they talk about things like C* algebras or B-splines or A-modules or D-branes or … really any combination of unexplained letter with abstract noun. (Extra points if the letter is Greek!)

But when I think of really genius ideas, I think of things like:

  • stairs. If stairs don’t exist, who is going to think “I need to invent stairs”?
  • alcoholic beverages. We trivialise that somebody must have just drank some rancid stuff and thought it was good.

    But no, people had invented sophisticated methods of getting particular tastes long before modern chemistry. When natural philosophers were still talking about phlogiston, Bordeaux already had fine wine down to a science.
  • rope
  • buckets, bowls, pots
  • handles on mugs
  • screws, bolts, nuts
  • ball bearings!
  • sponges with a scratchy pad … and how do they make those scratchy pads anyway?
  • mitred joins, moulding, wainscoting
  • sewing. I guess you notice pretty quickly when you sew stuff that many small stitches are super powerful, even with a thin thread. But who’s going to never have thought of the concept of a needle and thread before and suddenly think of it?
  • weaving. Warp, weft … have you seen these old tapestry machines? They’re the predecessor of the modern computer.
  • the invention of a chair. Again, suppose no chairs exist. Who is going to think of one and how?
  • toilets.

Let me go a little deeper into several of the brilliant things about modern toilets.

  1. First of all there are the two hinged things, which are stacked in the right order. First one being — not only so your butt doesn’t touch the bowl (because they could just make a bowl with a flat ring on top of it, not make it detachable)—but so anyone who pees from a height doesn’t have to splash onto where everyone sits.

    Second hinge controls the cover—which is a great idea because not only will stuff not fall into the toilet, but residual smells will be kept in. Let’s say your toilet is clogged, for instance. Then keeping the cover down is the best thing you can do for your comfort. By the way: without looking at your toilet, try to draw a diagram for how a series of hinges could control two separate toilet covers, and be bolted into the bowl.
  2. But the true genius is putting water in a bowl. Not only does it give you a way to evacuate the crap, but it reduces the smell.
    http://fc00.deviantart.net/fs45/f/2009/132/b/a/Smelly_Poop_by_gybbi94.jpg
    Smells, of course, are volatile particulate matter that are flung off into the air from your poop, and reach your nose. (Which means that every time you smell poop, poop is getting on your towel, toothbrush, …. I don’t understand why people put showers, toothbrushes, and baths in the same room as where they poop — I mean it’s convenient for plumbing, but I would rather have my poop be as far away from my toothbrush as possible. Well, until I can design and live in my dream house, I have one of those cheapo toothbrush covers.)
    http://titusdentistry.com/wp-content/uploads/2011/03/toothbrush2.jpg
    So how can we cover up an entire piece of poop — it could have lots of shapes, we don’t want to have to touch it, we want to cover all of it with no errors, and we want to compress the poop particles so that they don’t fly off the turd. WATER. Yes. Next time you go in a pit toilet or port-o-let at a concert or camping, hyperventilate before you go in, cover your nose, and wish that they had poured gallons of water into the bank before everyone pooped in it.

That’s leaving aside the efficient manufacture of commodes and the sewage system, which I’m sure are both marvels of their own. You think about something like New York City, it’s a human habitation of 6 million people, each taking maybe 5-10 dumps per week (well, in good times). That’s 30–60 million pieces of crap every week that nobody wants to see or smell ever again.

Dwelling Portably 1980-1989

Imagine you just dug a hole in the side of a hill, Hobbit-style, in a natural clearing. Suppose, too, that you’re close enough to a lake or stream that you can get water to your house easily. (Or it rains enough and you bought some huge rainbarrels.) Then what the crap are you planning to do with all of the crap you generate?! That’s a conundrum for ya.