Not news to me, either, Drew.

Aaw, I should have told you. Thereâ(TM)s some equation that relates energy, mass, and the speed of light. Probably most physics postdocs have heard of it.

Thanks, Will-O. I quite remember this cia guyâ(TM)s rubber stamp collection with dozens of great stamps: NOFORN, EYES-ONLY, and different fonts of Secret and top secret. Damn, but the guard at the place seized my paper with all those stamps.

On the other hand, I still have a VIP parking pass for the CIA headquarters â" Lets ypu park right at the front steps. Valid, if you have a time machine going back to April 5, 1988.

My warm thoughts fly over to you, Kill (owatt-) Hour â" last weekâ(TM)s eclipse fund me beneath stratus clouds just east of Buffalo, having a wonderful (though cloudy) day with 4 generations of my family. Itâ(TM)s a joy to see how my home town has evolved â" memories of climbing the Michigan Avenue Lift Bridge at midnight and watching them tap the redhot coke ovens at Bethlehem/Lackawanna Steel mills.

Following up, I am honored by the attention and kindness of fellow nerds and online friends. When I first started on that chase in 1986, I had no idea wrhere it would lead me.

A curious accounting error led me through Unix internals, tcp/ip protocols, early Arpanet connections, and backwards to a group of computer hackers working for then Soviet & Stassi agencies. Along the way, I met people from the FBI, NSA, CIA, AFOSI, and plenty of very smart computer jocks.

It was a time of analog phones and dial up modems; when you would carry coins in your pocket to make calls on the street.

Since then, thanks to the support of online friends and math folk, I have explored and shared interests in topology and math. Along the way, Iâ(TM)ve made plenty of mistakes and bloopers; pretty much the same as student times. Goofups in grad school are easier to sweep aside!

To all my friends: May you burdens be light and your purpose high. Stay curious!

- Cliff

Iâ(TM)ve been away from slashdot for a while, and Iâ(TM)m now on a post-eclipse trip on the east coast.

With good fortitune (and Amtrak), Iâ(TM)ll be home in 10 days; Iâ(TM)ll then fill the tsunami of Klein bottle orders that havve arrived in the past few hours. Over a dozenâ" Iâ(TM)ll be catching up for a few days!

Smiles all around,
-Cliff on a rainy Saturday in Potsdam, NU

Pretorian Technologies of Lincolnshire, UK http://www.pretorianuk.com/ specializes in computer devices for disabled, and semi-disabled users. They make a wide variety of trackballs, joysticks, mouse alternatives, big switches that can be activated by your elbow or knee, iPad switches, bluetooth linked switches etc.

Their devices are aimed at those with "limited hand control, fine and gross motor skill difficulties, poor hand-eye coordination, limited manual dexterity, repetitive strain injury, involuntary muscle spasms, spastic and flaccid paralysis, cerebral movement disorder or central neuromuscular disability and inflammatory or degenerative change"

  From their website, http://www.pretorianuk.com/n-a...

The n-ABLER Trackball is the most adaptable Mouse Alternative on the market specifically designed to address the needs of computer users with limited hand control, motor skill difficulties, poor hand-eye co-ordination, lack of manual dexterity and involuntary muscle spasms.

In the USA, their products are available through InclusiveTLC.com .... not cheap (the anti-tremor joystick costs $440) but they look excellent for the application. a giant 3 inch diameter bright red switch that talks bluetooth (for the iPad, I think) runs about $150. see http://www.inclusivetlc.com/is...

From 1964 through around 1975, planetary astronomers at Tucson's Lunar & Planetary Laboratory used physical models to project and remap the moon's surface. They took high resolution photos through an earth based telescope, and then projected the images onto a spherical, white plaster globe. By carefully controlling the geometry, and knowing distances, angles, and (yes) lunar libation, they created detailed maps of the moon's near side, taking into account geometric distortion around the limbs. In this way, they could rephotograph parts of the lunar far-side.

The rectified lunar atlas can now be seen at https://www.lpl.arizona.edu/si...

This was all done using telescopes, photographs, and optical projection ... all analog, earth-based work. (the main telescope was the 61" reflector at Mt. Bigelow in Tucson; the films were Kodak 3-AJ 10x10inch glass plates)

It was my honor to work with several of these astronomers, including Ewen Whitaker, Gerard Kuiper, Bill Hartmann, and Bob Strom. Brilliant scientists who would be astounded and impressed to see those NASA/Goddard videos. What we take for granted today, once required several years of detailed work.

I was honored to know Glenn Seaborg while working at Lawrence Berkeley Labs in the 1980's. By then, Manhattan Project was long behind him, as was his Nobel prize, the Atomic Energy Commission work, and his chancellorship of the University of California. Yet he was still a kind and supportive scientist who was deeply interested in any research - whether in physics, astronomy, chemistry, or biology. He recognized the need to teach music and art alongside science and math, and would visit local high schools to encourage students.

I once met him at the Lawrence Hall of Science, walking around the old cyclotron. When I asked him about it, he said that he'd been wondering how the field magnets had been mounted (it was perhaps 40 years after the Manhattan Project). After a short chat he invited a few 12 year old kids over, and told stories about using the beast to create new elements. Amazing guy.

Can't resist tooting my own horn. These are from my Klein bottle website:

    TOPOLOGY CONSULTANT Part-time design of low-dimensional manifolds in glass, wool, plastic, titanium, niobium, pentium, and unobtanium. Ideal candidate is fresh out of college with 20 years experience in applied topology; and can solve Poincare's, Heawood's, and Hodge's conjectures. Pay & benefits are epsilon above unemployment. Compensation package includes trillions in worthless stock options.

    GLASSBLOWER Construct borosilicate manifolds using lampwork. Handy with glass lathe, oxy-hydrogen torch, and bandaids. Must know the usual cuss words to describe breaks & cracks. Experienced in minor burn treatment. Special bonus if you know the difference between inside and outside.

    MANIFOLD OPERATOR. Curvaceous, conformal Riemannian vector field desires normalized Ricci tensor with nice eigenvalues. Will relocate within proper metric space. No polymorphic permutations, please.

    From http://www.kleinbottle.com/job...

Hi gang,

        Thanks for the reports of stale gasoline - I'm convinced. Tonight I'll head out & recycle my old gas. The problem isn't getting things together; it's keeping it all up to date & ready. Your comments hit me in the right place: be prepared.

        I'm associated with a ham radio emergency group; the rule is that the station's equipment must be immediately ready for action. In an emergency, you don't have the luxury of stringing a cable, or figuring out which power supply can work with which rig. If the transceivers aren't wired up, tested, and set to go, they might as well be underwater. Same's true for on-the-air skills. You gotta check into the 2-meter net at least every month, or you'll get rusty and screw up when things get hot.

      And so it is with earthquake readiness. It's not enough to put away a survival stash and let it molder. Gotta keep things fresh - gotta keep my skills sharp.

Best wishes,
-Cliff
        ps to ksmithderm ... sure, I've got Klein bottle hats (and Mobius scarves). They're on m'website.

Background: I live on North Oakland, next to Berkeley, in the Rockridge section. Urban, detached 2 bedroom house about 100 years old.

We bolted down our house, fully reinforced the stemwalls, and installed shearwalls. For our little 2-bedroom bungalow in Oakland, this set us back around $20,000. Earthquake insurance seemed outrageous (around $2,500/year, with very limited benefits). Along with the earthquake retrofit, we set aside a few cases of food & twenty 5-gallon jugs of water. A 2Kw Honda generator. Radio, flashlights, FRS walkie-talkies, etc. Small amount of medical stuff.

Yes, I have onsite and offsite backups (that's easy); the real problem would be connectivity after a quake. There's probably a hundred telephone poles between my house and the central office.

Some challenges: Keeping food & water fresh is a problem - cans get rusty as water condenses on cold surfaces. Some camping food goes bad. MRI rations taste, well, horrible. We should replace water & food annually, and generally forget to. (We discovered diapers in our earthquake stash, left over from when our college kids were infants)

    Storing gasoline for the generator is a problem. I'm told that gasoline gets stale after a few months (is this true, or an urban legend?). It's a pain to lug a 3 gallon gas can around, and it's not something I want under my house. (I store it in a shed, where it's out of sight & out of mind - so I rarely refresh it. Is there a small, 5 or 10 gallon under-ground gasoline storage tank?). I should start and exercise the generator every month; it's more like every two years or so. Our experience in the 1989 quake was that gas stations can't pump after an earthquake (no power).

  Our neighborhood's quake group (the Oakland - Rockridge Shakers) meets every summer, and the earthquake drills have been quite useful - we've had several fun practice sessions, where we hunt for human dummies hidden around the neighborhood, search for downed wires, and practice using walkie-talkies. Afterwards, it's a block party, and we compare notes while sharing lunch.

    My home business, Acme Klein Bottles, lost two glass Klein bottles in last night's quake. Both fell off a shelf and shattered on the floor. Good lesson: keep my glassware stored down low, with holders to prevent boxes from shifting. Since most of my glass Klein bottles are stored under our house; a major local temblor that destroyed the house would also wipe out the business.

This is important work, which compliments terrestial geomagnetic measurements and space based observations.

The earth's magnetic field results from a planetary dynamo. Magnetic field lines get frozen into the electrically conductive fluid core. Then, differential motions in the fluid causes the magnetic field to get twisted up -- it's no longer is the simple dipole (like those bar magnets that you played with as a kid). Instead, the earth's magnetic field develops high order moments (sorta like bumps and dips). These shapes evolve as the conductive core moves. Eventually, the magnetic field gets so tangled up, that it unravels. At that time, the earth's field reverses. These magnetic field reversals show up in the geologic record ... every 10,000 to 100,000 years, there's a flipover.

Measurements like the ESA Swarm satellite give us a handle on the evoloution of the Earth's magnetic field, as well as showing how that field interacts with the magnetic and particle environment of the solar wind.

(disclaimer - most of what I just posted is from a terrific graduate class that I took at the Lunar & Planetary Labs way back in 1979, and when I worked with Charles Sonett, who studied the solar wind. Likely, much of this is way out of date!)

Thanx!

I saw a short section of the German version of that Nova show ... apparently I speak fluent German in the that version!

Mit den besten Wünschen,
-Cliff

And my thanks back to you, oh Anonymous Coward: The 15 cents in royalties from your purchase of m'book is now helping my kids attend college. Uh, it'll last about 1.3 minutes.

You say that you're managing firewalls - all sorts of possibilities! I had the honor of working with Van Jacobson at LBL when he first researched TCP/IP traffic jams and compression. I was amazed at how much could be done by looking at traffic and thinking about the interaction of traffic, buffers, routers, and network congestion. Wonderful stuff - what looks like a boring problem may be an opportunity for research.

With that in mind, here's my encouragement to you: Go and sharpen your tcpdump & wireshark tools. Figure out what's really happening to those packets. Who knows what you'll uncover?