Floppy-ROM
Back in the early days of computing, common audio cassettes were used to store computer programs before hard disks were created. The Kansas City Standard for encoding binary data with audio signals was created to :
record data as “marks” (one) and “spaces” (zero). A mark bit consisted of eight cycles at a frequency of 2400 Hz, while a space bit consisted of four cycles at a frequency of 1200 Hz. A word, usually one byte (8 bits) in length, was recorded in little endian order, i.e. least significant bit first. 7-bit words were followed by a parity bit.
Someone took the “bits as audio” idea one step further, and decided to try pressing a data phonograph record:
Daniel Meyer and Gary Kay of Southwest Technical Products arranged for Robert Uiterwyk to provide his 4K BASIC interpreter program for the 6800 microprocessor. The idea was to record the program on audio tape in the “Kansas City Standard” format then make a master record from the tape. Eva-Tone made “sound sheets” on thin vinyl that would hold one song. These were inexpensive and could be bound in a magazine.
Bill Turner and Bill Blomgren of MicroComputerSystems Inc. worked with EVA-TONE and developed a successful process. The intermediate stage of recording to tape produced dropouts so a SWTPC AC-30 cassette interface was connected directly to the record cutting equipment.
The May 1977 issue of Interface Age contained the first “Floppy-ROM”, a 33⅓ RPM record with about 6 minutes of “Kansas City standard” audio.
Kansas City Standard: Floppy-ROM: Wikipedia, the Free Encyclopedia
Very Long-Term Backup
Paper, it turns out, is a very reliable backup medium for information. While it can burn or dissolve in water, good acid-free versions of paper are otherwise stable over the long term, cheap to warehouse, and oblivious to technological change because its pages are “eye-scanable.” No special devices needed. Well-made, well-cared for paper can last 1,000 years easily, and probably reach 2,000 without much extra trouble.
We can not say the same for digital storage. Pages stored on plastic DVDs are neither stable over the very long term, nor readable over the long term. Unless digital information is ceaselessly migrated from one fading medium to another new one, it will quickly cease to be accessible. Two decades ago the floppy disk was ubiquitous. Most personal digital information then was stored on this format. Today, any information stored only on a floppy disk is essentially gone. Imagine the incompatibility of today’s DVD in 1,000 years.
As durable as paper is, its inherent limitations in storing digital data are clear. Pity the person who would need to find something if the only backup of the web was a paper printout that filled several airline hangers. What we need are media that have the durability of paper and the accessibility of a floppy disk (or better!).
This problem of long-term digital storage seemed a crucial hurdle for any civilization trying to act generationaly. How could a society think in terms of centuries unless there was a reliable way to transmit and store its knowledge over centuries? This puzzle was the focus of a conference hosted by Long Now in 1998, dedicated to technical solutions for Managing Digital Continuity. At this meeting Brewster Kahle of the Internet Archive suggested a new technology developed by Los Alamos labs, and commercialized by the Norsam company, as a solution for long term digital storage. Norsam promised to micro-etch 350,000 pages of information onto a 3-inch nickel disk with an estimated lifespan of 2,000 -10,000 years.
Might it be possible to etch an entire library onto a set of disks? It might be worth trying. All we needed was a finite data set that a society might want to have backed up.
The Long Now Foundation has created a couple of 3″ Nickel disks that have been engraved with Genesis in over 1,500 languages, along with some other meta-data and language information. The image above is the “teaser” side, that will hopefully induce future finders to look for small writing on both sides of the disk. The other side looks like a mirror, but actually contains over 13,500 pages of text, readable with a 750x optical microscope. Very cool.
Voyager Golden Record
The Voyager Golden Record is a phonograph record included in the two Voyager spacecraft launched in 1977. It contains sounds and images selected to portray the diversity of life and culture on Earth. It is intended for any intelligent extraterrestrial life form, or far future humans, that may find it. The Voyager spacecraft would take about 40,000 years to reach the distance of the star nearest the Sun, Alpha Centauri at a distance of 4.4 light-years, though neither craft is traveling toward that star.
As the probes are extremely small compared to the vastness of interstellar space, it is extraordinarily unlikely that they will ever be accidentally encountered. If they are ever found by an alien species, it will most likely be far in the future, and thus the record is best seen as a time capsule or a symbolic statement rather than a serious attempt to communicate with extraterrestrial life.
Voyager Golden Record
Pioneer plaque
The Pioneer plaques are a pair of gold anodized aluminum plaques which were placed on board the 1972 Pioneer 10 and 1973 Pioneer 11 spacecraft, featuring a pictorial message from humanity, in case either Pioneer 10 or 11 are intercepted by extraterrestrial beings. The plaques show the nude figures of a human male and female along with several symbols that are designed to provide information about the origin of the spacecraft.
The Pioneer spacecraft were the first human-built objects to leave the solar system. The plaque is attached to the antenna support struts in a position that shields it from erosion by stellar dust.
Pale Blue Dot
The Pale Blue Dot is a photograph of planet Earth made by Voyager 1 from a record distance, showing it against the vastness of space. It is also the title of a 1994 book by astronomer Carl Sagan that was inspired by the photo. In 2001, it was selected by Space.com as one of the top ten space science photos.
The photograph taken below was captured by the Voyager 1 spacecraft from a distance of approximately 3.7 billion miles. Earth is seen near the right side of the image, inside a band of light caused by side-effects of the camera.
American and British English spelling differences
American and British English spelling differences are one aspect of American and British English differences. The spelling systems of Commonwealth countries, for the most part, closely resemble the British system. In Canada, however, while most spelling is “British”, many “American” spellings are also used.
via American and British English spelling differences – Wikipedia, the free encyclopedia
Dyson Sphere
A Dyson sphere (or shell as it appeared in the original paper) is a hypothetical megastructure originally described by Freeman Dyson. Such a “sphere” would be a system of orbiting solar power satellites meant to completely encompass a star and capture most or all of its energy output. Dyson speculated that such structures would be the logical consequence of the long-term survival and escalating energy needs of a technological civilization, and proposed that searching for evidence of the existence of such structures might lead to the detection of advanced intelligent extraterrestrial life.
The concept of the Dyson sphere was the result of a thought experiment by physicist and mathematician Freeman Dyson, where he noted that every human technological civilization has constantly increased its demand for energy. He reasoned that if human civilization were to survive long enough, there would come a time when it required the total energy output of the sun. Thus, he proposed a system of orbiting structures designed to intercept and collect all energy produced by the sun. Dyson’s proposal did not detail how such a system would be constructed, but focused only on issues of energy collection.
via Dyson sphere – Wikipedia, the free encyclopedia
Pittsburgh Left
The Pittsburgh Left involves two cars facing one another waiting at a traffic light or other stop signal: one turning left and one going straight. The left-turning car will execute its turn through the intersection before the car going straight passes through the intersection, where normally it would yield. Permission to do so is either given by the car going straight, or sometimes taken by the left-turning car by starting through the left turn early enough so as not to obstruct the straight-going driver. This practice is seen as courteous, because a very small delay for the oncoming vehicle can eliminate a long delay for the left turning vehicle and those blocked behind it.
In practice, Pittsburgh drivers often make the Pittsburgh Left by anticipating the green signal after cross-traffic has stopped or cleared, but before the actual signal change. This practice is so common that straight-going drivers in the area are accustomed to pausing a moment before proceeding on green, for their own safety.
Ed: This is not really as prevalent as the article makes it seem. One day, while driving to the store, I had a straight-going driver beep at me and gesture that I should turn left in front of his car. So I did.
Kardashev Scale
The Kardashev scale is a general method of classifying how technologically advanced a civilization is. It was first proposed in 1964 by the Soviet astronomer Nikolai Kardashev. The scale has three designated categories called Type I, II, and III. These are based on the amount of usable energy a civilization has at its disposal, and the degree of space colonization. In general terms, a Type I civilization has achieved mastery of the resources of its home planet, Type II of its solar system, and Type III of its galaxy.
Space Fountain
Just in case space elevators were too boring for your tastes…
“A space fountain is a proposed form of space elevator that does not require the structure to be in geosynchronous orbit, and does not rely on tensile strength for support. In contrast to the original space elevator design (a tethered satellite), a space fountain is a tremendously tall tower extending up from the ground. Since such a tall tower could not support its own weight using traditional materials, massive pellets are projected upward from the bottom of the tower and redirected back down once they reach the top, so that the force of redirection holds the top of the tower aloft. Satellite payloads ascend or descend by coupling with this stream of pellets or by climbing up the side of the tower. The space fountain has several key advantages over a space elevator in that it doesn’t require materials with extreme strength, can be located at any point on a planet’s surface instead of just the equator, and can be raised to any height required. Its major disadvantage is that it is an active structure, and so requires constant power input to remain aloft.”
Space fountain – Wikipedia, the free encyclopedia