Archived Thoughts

February 28, 2003
Ancient Tech

Yesterday I came across this article about one of the most famous and mysterious finds of ancient technology: Baghdad's Batteries. These batteries were discovered in 1938, and are capable of creating up to several volts of output. Beyond that, very little is known.

Another example of amazing and thoroughly unexpected technology is the ancient greek 'computer,' which was discovered in 1901. It appears to be a machine for calculating the motion of the stars and planets...

Among the treasures of the Greek National Archaeological Museum in Athens are the remains of the most complex scientific object that has been preserved from antiquity. Corroded and crumbling from 2,000 years under the sea, its dials, gear wheels and inscribed plates present the historian with a tantalizing problem. Because of them we may have to revise many of our estimates of Greek science. By studying them we may find vital clues to the true origins of that high scientific technology which hitherto has seemed peculiar to our modern civilization, setting it apart from all cultures of the past.

From the evidence of the fragments one can get a good idea of the appearance of the original object [see illustration on page 62]. Consisting of a box with dials on the outside and a very complex assembly of gear wheels mounted within, it must have resembled a well- made 18ih-century clock. Doors hinged to the box served to protect the dials, and on all available surfaces of box, doors and dials there were long Greek inscriptions describing the operation and construction of the instrument. At least 20 gear wheels of the mechanism have been preserved, including a very sophisticated assembly of gears that were mounted eccentrically on a turntable and probably functioned as a sort of epicyclic or differential, gear-system.

Nothing like this instrument is preserved elsewhere. Nothing comparable to it is known. from any ancient scientific text or literary allusion. On the contrary, from all that we know of science and technology in the Hellenistic Age we should have felt that such a device could not exist. Some historians have suggested that the Greeks were not interested in experiment because of a contempt-perhaps induced by the existence of the institution of slavery-for manual labor. On the other hand it has long been recognized that in abstract mathematics and in mathematical astronomy they were no beginners but rather "fellows of another college" who reached great heights of sophistication. Many of the Greek scientific devices known to us from written descriptions show much mathematical ingenuity, but in all cases the purely mechanical part of the design seems relatively crude. Gearing was clearly known to the Greeks, but it was used only in relatively simple applications. They employed pairs of gears to change angular speed or mechanical ad- vantage, or to apply power through a right angle, as in the water-driven mill.

Even the most complex mechanical devices described by the ancient writers Hero of Alexandria and Vitruvius contained only simple gearing. For example, the taximeter used by the Greeks to measure the distance travelled by the wheels of a carriage employed only pairs of gears (or gears and worms) to achieve the necessary ratio of movement. It could be argued that if the Greeks knew the principle of gearing, they should have had no difficulty in constructing mechanisms as complex as epicyclic gears. We now know from the fragments in the National Museum that the Greeks did make such mechanisms, but the knowledge is so unexpected that some scholars at first thought that the fragments must belong to some more modern device.

I hope that other treasures like that surface from the wrecks located in the bottom of the Meditteranean.

Posted by Patrick at 06:22 PM
February 20, 2003
The Picture of the Day!

This picture came out exactly how I wanted it to look. It was taken in Millennium Park in downtown Chicago, near the skating rink and Michigan Avenue.


Posted by Patrick at 12:04 AM
February 19, 2003
Lake Michigan Frozen Again

A couple of days ago Lake Michigan was covered in ice from horizon to horizon. The ice by the shore was comprised of thin sheets that had been completely shattered into countless pieces. The lake looked like it was made out of broken glass instead of water; I'm guessing that the winds were strong enough to blow the larger icebergs into the shore to create the fragments.

   

I discovered the ice while I was walking home at night, I came back the next morning hoping to have some direct sunlight so that it would glow. That didn't happen, but I did get some moody pictures of a sullen and mean looking lake. At the end of the breakwater somebody had hauled a large and heavy old television out, and apparently smashed it in some sort of ritual fashion. It wasn't there when I checked it out the night before.

This morning the sun was out so I returned to take some more pictures. Unfortunately most of the ice had drifted away during the last 24 hours, leaving a much smaller area to see. The ice glittered like diamonds from some angles, the shards provided a much richer range of contrast in the bright light. I've added the photos to my Chicago Winter album if you want to check them out.


Posted by Patrick at 11:55 PM
February 16, 2003
Winged Migration

Topping my current list of movies that I really want to see is Winged Migration, a documentary about birds. The cinematrography looks absolutely breathtaking, the camera is flying with the birds providing a POV that humans have never really experienced.

The film has limited narration, allowing the camera and the birds to tell the 'story' through most of it.

Posted by Patrick at 02:25 PM
February 11, 2003
A Windy Winter's Night in Chicago

Tonight was a really cool night of weird weather in Chicago. A strong frontal winter storm blew through this evening, with blinding snow and 50 mile an hour winds. I am sure that if it happened during the spring we would have seen some tornadoes.

I left work late tonight, so I decided to catch the 'L,' since the 147 probably wasn't running. The walk to the train was quite difficult, due to the incredibly strong gusts of wind that pummeled me every time I entered an open area. I managed to get to the stair case at Grand just in time to catch this small Asian woman who was literally being blown across the sidewalk. The slush was too slippery and she was quickly heading to the road!

I took a few pictures tonight, and finally set up a gallery of some of my Chicago Winter night time pictures...

Sun Pillar  Belmont Station  Michigan Avenue

Who needs filters with colors like this?

February 09, 2003
Fire Dancers at Chase Cafe

I visited my favorite hangout, the Chase Cafe and managed to catch the end of a cool fundraising event to preserve the area's uniqueness, and keep the shoreline the way it is. The event ended with a beautiful fire dancing performance, which I took some cool shots of the the dancers and their arcing fire.

Posted by Patrick at 10:59 PM
My Cat!

This is my silly cat hanging out in the bathroom sink. Apparently it is very cosey!

My Cat
Posted by Patrick at 11:24 AM
February 05, 2003
Thermo Optic Camouflage

Masamune Shirow's manga series, animated movies and current TV series 'Ghost in the Shell' show characters using a type of camouflage that makes the wearer nearly invisible. (The movie 'Predator' and the last James Bond film also show variations of this idea.) The basic principle is a refinement of the World War II vehicle cloaking technology that was pioneered by the United States (and possibly Britain). The early experimental trucks would measure the value of light on one side of the vehicle and reproduce the intensity on the other side using a grid of lights, at a distance the vehicles would blend into the horizon. The practicality of armored vehicles covered in light bulbs deterred any sort of real use for the technology.

Thermoptic Camouflage from Ghost in the Shell

In recent times there have been rumors and rumblings about American experimental stealth aircraft that possess a more advanced variant of the optical camouflage, utilizing an advanced fiber optic skin to produce a similar effect. Whether or not this is factual remains unknown at this time.

A couple of days ago a story broke about a real, rudimentary form of personal optical camouflage being shown by a researcher at Tokyo University. While it is quite dependent on the exact viewpoint of the observer, it is a pretty amazing acomplishment...

Real Optical Camouflage from Japan
Posted by Patrick at 10:22 PM
February 01, 2003
Space Shuttle Columbia Explodes

Columbia exploded while coming down to land today, killing all seven astronauts on board and leaving wreckage over Nacogdoches, Texas.

I still remember clearly when the Challenger exploded during take off back in 1986. It was the first national tragedy that I can remember clearly, I was in middle school and we all just watched the news in disbelief. My condolences go out to the families and friends of the astronauts and everyone else involved in the shuttle program.

It can even be seen on radar...

The contrail

Posted by Patrick at 11:06 AM