Thứ Năm, 3 tháng 1, 2013

Debra and Stan

Debra and her partner Stan share a passion for creativity and personal expression. Debra goes to yoga a few times a week, but her and Stan's sport of choice is thrift store shopping. It's always so much fun to see how they inspire eachother.

Thứ Tư, 2 tháng 1, 2013

Jackie

Jackie always looks stunning and perfectly put together. She never goes out without a great belt and bag and has a gorgeous smile to match.

Thứ Ba, 1 tháng 1, 2013

Fence Phone

[Image: Barbed wire, via Wikipedia].

One more radio-related link comes via @doingitwrong, who mentions the use of barbed-wire fences as a kind of primitive telephone network.

"Across much of the west," C.F. Eckhardt explains, "...there was already a network of wire covering most of the country, in the form of barbed-wire fences. Some unknown genius discovered that if you hooked two Sears or Monkey Ward telephone sets to the top wire on a barbed-wire fence, you could talk between the telephones as easily as between two 'town' telephones connected by slick wire through an operator's switchboard. A rural telephone system that had no operators, no bills—and no long-distance charges—was born."

The system relied upon the creative use of everyday materials as insulators; in fact, according to Delbert Trew, "the most clever, most innovative cowboys used every conceivable type of device as insulators to suspend the wire. I have found leather straps folded around wire and nailed to the posts, whiskey bottle necks installed over big nails, snuff bottles, corn cobs, pieces of inner-tube wrapped around the wire and short straps of tire holding telephone wires to the post."

[Image: From a June 1902 issue of The New York Times].

This ranchpunk system of interlinked fences led to the "big ranches" being "among the first to install barbed wire telephones in an effort to be alerted when prairie fires started"—an early-warning device for previously disconnected ranch owners, not a divisive symbol of modern property but a network, a transmitter, an oral internet of fences.

Project Sanguine and the Dead Hand

[Image: One of the stations of Project ELF, via Wikipedia].

Further exploring the radio-related theme of the last few posts, Rob Holmes—author and co-founder of mammoth—has pointed our attention to something called Project Sanguine, a U.S. Navy program from the 1980s that "would have involved 41 percent of Wisconsin," turning that state into a giant "antenna farm" capable of communicating with what Wikipedia calls "deeply-submerged submarines."

Each individual antenna would have been "buried five feet deep" in the fertile soil of the Cheese State, the New York Times explains, creating a networked system with nearly 6,000 miles' worth of cables and receiving stations.

The Navy was hoping, we read, for a system "that could transmit tactical orders one-way to U.S. nuclear submarines anywhere in the world, and survive a direct nuclear attack." This would "normally... require an antenna many hundreds of miles in length," according to the NYT, but Naval strategists soon "realized that a comparable effect could be achieved by using a large volume of the earth's interior"—that is, "looping currents deep in the Earth"—"as part of the antenna." The hard and ancient rock of the Laurentian Shield was apparently perfect for this.

[Image: From Roy Johnson, "Project Sanguine," originally published in The Wisconsin Engineer (November 1969)].

In other words, the bedrock of the Earth itself—not a mere island in the Antarctic—could be turned into a colossal radio station.

A similar system, installed for preliminary tests in North Carolina and Virginia, "apparently flickered lightbulbs in the area and caused spurious ringing of telephones," like some regional poltergeist or a technical outtake from Cabin in the Woods.

At least two things worth pointing out here are that a "scaled-down version" of Project Sanguine was, in fact, actually constructed, becoming operational in the northern forests of Michigan and Wisconsin from 1989-2004; called Project ELF (for Extremely Low Frequency), it arrived just in time for the Soviet Union to collapse...

[Image: Inside Project Sanguine; photo from Roy Johnson, The Wisconsin Engineer (November 1969)].

...which brings us to the second point worth mentioning: a strangely haunting program known as "The Dead Hand," a doomsday device constructed by the Soviet Union.

In his Pulitzer Prize-winning book of that title, historian David Hoffman writes about a (still active) weapon of retaliation. The "Dead Hand" was built such that, if nuclear field commanders ever lost touch with military leaders back in Moscow during a time of war, a constellation of cruise missiles would automatically launch. This would happen not in spite of a lack of living military leaders, but precisely because everyone had been killed. That is, a machine would take over—thus the name "dead hand."

Each cruise missile, however, flying over the lands of the USSR, would emit launch commands to all of the missile silos it passed over. Missile after missile would soon soar—thousands of them—arcing toward the United States, which would soon be obliterated, along with the rest of the world, in a nuclear holocaust controlled and commanded by nothing but preprogrammed machines.

In any case, Project Sanguine was its own version of an end-times radio, an "immense subterranean grid" transmitting to distant submarines by way of the Earth itself, humans using an entire planet as an apocalyptic radio device.
The previous two posts have led to a number of interesting links, including several comments over at Reddit that seem worth reproducing here.

There, a commenter named clicksnd "used to be in a special forces Signal Detachment (as a server guy) and got awesome cross training from our radio section. One cool thing they taught us is that if we ever needed to boost range, we could wire up to a fence or, in a pinch, knife a tree and wire to it!" When you need a radio, in other words, considering just sticking some metal in a tree.

To that, someone named pavel_lishin responds: "I remember hearing a story, possibly apocryphal, about a college radio station that used some nearby railroad tracks as their broadcasting antenna, and it worked well enough for the entire town to receive the signal clearly. In fact, it worked a little too well. Someone drove up from a town a couple of hundred miles away, and asked them to knock it off, since the signal was being broadcast all the way down there and interfering with a different radio station." Perhaps you could broadcast a radio station via all the nails in the walls of an abandoned suburb.

Finally, replying to someone mocking the idea that antennas have ever been more complex than "just a piece of metal connected to a receiver," someone named cuddlebadger says that, on the contrary, "the field has progressed a bit since 1919," when those tree-antennas were first being proposed. Today, cuddlebadger writes, "we have fractal antennas that look like [an] MC Escher drawing and work incredibly well. Genetic algorithms that design alien-looking antennas that are barely visible yet outperform many all-human designs. Someone even draws nanometer-scale antennas out of gold on tiny glass hemispheres for that extra efficiency. Antennas exist that can literally capture the electromagnetic radiation of sunlight!"

Electromagnetic Escher mazes made of gold, picking up emanations from stars: technology as myth achieved by other means.

Antarctic Island Radio

[Image: Deception Island, from Millett G. Morgan's September 1960 paper An Island as a Natural Very-Low-Frequency Transmitting Antenna].

Yesterday's post reminded me of an interesting proposal from the 1960s, in which an entire Antarctic island would be transformed into a radio-conducting antenna. Signals of international (or military submarine) origin could thus be bounced, relayed, captured, and re-transmitted using the topographical features of the island itself, and naturally occurring ionospheric radio noise could be studied.

[Image: A map of Deception Island, taken from an otherwise unrelated paper called "Upper crustal structure of Deception Island area (Bransfield Strait, Antarctica) from gravity and magnetic modelling," published in Antarctic Science (2005)].

In the September 1960 issue of IEEE Transactions on Antennas and Propagation, radio theorist Millett G. Morgan, a "leading researcher in the field of ionospheric physics" based at Dartmouth, speculated that he could generate artificial "whistlers"—that is, audial electromagnetic effects that are usually caused by lightning—if only he could find the right island.

"In thinking about how to generate whistlers artificially," Morgan's proposal leisurely begins, "it has occurred to me that an island of suitable size and shape, extending through the conducting sea, may constitute a naturally resonant, VLF slot antenna of high quality."

[Image: Deception Island, from "Upper crustal structure of Deception Island area (Bransfield Strait, Antarctica) from gravity and magnetic modelling," Antarctic Science (2005)].

He looked far and wide for this "naturally resonant, VLF slot antenna," eventually settling on a remote island in the Antarctic. "Following this line of reasoning," he explains, "I thought first of the annular Pacific atolls, but knowing of the fresh-water lenses in them"—that is, aquatic features that would destructively interfere with radio transmissions—"[I] rejected them as being too pervious to water to be satisfactory insulators. Also, of course, they are not found in suitable latitudes for generating whistlers."

Morgan's reasoning continued: "The Pacific atolls are built upon submerged volcanic cones and this led me to think of Deception Island in the SubAntarctic, a remarkable, similarly shaped, volcanic island in which the volcanic rock extends above the surface; and which is located in the South Shetland Islands where the rate of occurrence of natural whistlers has been found to be very great."

Perhaps the island could be the geologic radio antenna he was looking for.

[Image: Deception Island, from "Upper crustal structure of Deception Island area (Bransfield Strait, Antarctica) from gravity and magnetic modelling," Antarctic Science (2005)].

Morgan points out in detail that mathematical ratios amongst the island's naturally occurring landscape features, including its ring-shaped lagoon, are perfect for supporting radio transmissions (even the relationship between the length of the island and the radio wavelengths Morgan would be using seems to work out). And that's before he looks at the material construction of the island itself, consisting of volcanic tuff, which would help the terrain act as an "insulator."

There is even the fact that the island's small lagoon is coincidentally but unrelatedly named "Telefon Bay" (alas, named after a ship called the Telefon, not for the island's natural ability to make telephone calls).

[Image: Deception Island, from "Upper crustal structure of Deception Island area (Bransfield Strait, Antarctica) from gravity and magnetic modelling," Antarctic Science (2005)].

Morgan's "proposed island antenna" would thus be a wired-up matrix of transmission lines and natural landscape features, bouncing radio wavelengths at the perfect angle from one side to the other and concentrating broadcasts for human use and listening.

You could tune into the sky, huddling in the Antarctic cold and listening to the curling electromagnetic crackle of the ionosphere, or you could use your new radio-architectural set-up, all wires and insulators like some strange astronomical harp, "to generate whistlers artificially," as Morgan's initial speculation stated, bursting forth with planetary-scale arcs of noise over a frozen sea, a wizard of sound alone and self-deafened at the bottom of the world.

(Deception Island proposal discovered via Douglas Kahn, whose forthcoming book Arts of the Spectrum: In the nature of electromagnetism looks fantastic, and who also gave an interesting talk on "natural radio" a few years ago at UCLA).