Won't Someone Think of the Children...
and ban Diane Feinstein from the internet? Every time her name appears, substitute it with an appropriate phrase, such as "whacked out, senile, crazy senator from Kahli-fornia". ;-)
Anonymous (of course).
199 posts • joined 22 Jun 2009
and ban Diane Feinstein from the internet? Every time her name appears, substitute it with an appropriate phrase, such as "whacked out, senile, crazy senator from Kahli-fornia". ;-)
Anonymous (of course).
Why not an IBM 1403 model N1? One of those would run rings around a LP05.
Plus, the N1 model had an auto-cover-raise feature, to let the operator know when it was out of paper. That did wonders for people who stacked printouts on top of it, along with the stray cup of coffee or soda. ;-)
Actually, the Americans did it not quite 20 years ago:
This was a team led by Bill Brown. But, in order to get around those obnoxious regulations, they had to rent a barge, and go 100 miles off-short, so that they were launching in international waters.
It's those pesky FAR 101 rules (14CFR101):
Specifically, it's probably 14CFR101.7(b):
"(b) No person operating any moored balloon, kite, amateur rocket, or unmanned free balloon may allow an object to be dropped therefrom, if such action creates a hazard to other persons or their property."
And, the rocket could always poke someone in their eye, which would make it a hazard. :-(
Oh, there may be other issues, too, such as altitude limits on model rockets, etc.
The usual way these things are handled is to get a waiver from the FAA, which can take forever and then some, assuming that it's granted at all.
There were stars there? There was a mug there? Pardon me; I was mesmerized by the lovely young lady in that picture.
I, too, got to synchronize an AC alternator with the mains while I was in engineering school. And, yes, there were stories of where idiots had gotten the connection/phasing/synchronization wrong and wrecked the alternator. But, that wasn't the worst incident!
I was in the last engineering lab that got to see the power distribution equipment for the engineering building. You see, the power was brought into the engineering building as a 14.4 KV three-phase feed. It entered in conduits, went through a three-phase, oil-filled breaker/switch, then to the three-phase transformer, where it was stepped down to 117/234 Volts for distribution throughout the building.
That three-phase breaker was a real piece of work. It was normally kept locked. And, to use it, after removing the lock, one operated the handle three times, which cocked a spring. At the end of the third stroke of the operating lever, it released the spring, which rapidly drove the contacts apart. With 14.4 KV (RMS) on them, and under a fair load, they would, of course, arc. But, the idea was that the contacts would fly apart so rapidly that the oil would quench the air, in conjunction with the magnetic blowout device (where a magnetic field pushes the arc sideways, to increase the length, to help extinguish it).
Well, some idiot had left the breaker handle unlocked. And, the latch inside the breaker had failed. And, some idiot had precocked it with one stroke. That created a disaster just waiting to happen.
So, as the international graduate student, who was teaching the lab session, started waiving his arms around as he explained the workings of all of the equipment, his elbow bumped the breaker handle. With the failure of the latch, and the partial cocking of the device, it caused the contacts to open by approximately one inch. Now, a one inch gap, at 14.4 KV under full load, will not interrupt the circuit. All it will do is create one h*ll of an intense arc, one that the oil will not quench, but which will merely boil (and carbonize) the oil, causing it to eventually pop the over-pressure relief valve, which causes most of the room to be sprayed with hot oil. Even worse, the magnetic blowout will not cause the arc to be extinguished, but will merely push it sideways, such that the arc between the circuit contacts turns into an arc between the incoming 14.4 KV line and the grounded frame. Ohoh!
This arc will consume megaWatts (or more!) of power, which will not only overload the distribution system, but will create a very substantial phase imbalance in the distribution network. The result of this is that the upstream breakers will trip at the substation feeding the entire university campus. That wouldn't necessarily have been so bad, except that this was on a Wednesday morning, in the dead of winter, when the entire electrical system was under a maximum load condition. The sudden removal of such a significant load, in such a sudden and unbalanced manner, caused the transmission line to go off-line. The sudden removal of the transmission line load on the generating station caused it to go out of synchronization with the rest of the region wide network, causing the entire generating station to go off-line. The cascade was impressive, resulting in a substantial portion of the state being blacked out.
Even more impressive was the stack of paperwork and engineering reports that swirled around for weeks afterwards. Fortunately, no one was killed in the incident, although that was probably more due to pure dumb luck than anything (I am told that quite a few pairs of underwear were ruined!).
And, yes, I can provide details. It happened in the late winter (February) of 1982.
Ever experienced a floating neutral? We have. We lost the neutral to a three-phase fed building once. It probably had something to do with all of the computer equipment that was being used in the building, and the tendency for such equipment to produce a high harmonic content on the power lines, and this tends to cause the neutral currents not to balance out, which results in a much higher than normal neutral current, which has been know to melt/fuse/blast neutral connections. The result is that the neutral connection inside the building starts floating, and all of the phase voltages go VERY wonky due to that floating neutral. I measured 117 Volt outlets producing anywhere between about 70 Volts and 180 Volts. Of course, we shut down all of the computers as rapidly as we could, and, quite surprisingly, we didn't lose any! We did lose a BUNCH of fluorescent lights, though. Yeah, that was, umm, fun.
There is a story of one of the early magnetic drum storage units being installed on a naval destroyer. The rapidly rotating drum produced an extreme gyroscopic effect, so much so that when the captain ordered a course change, the ship refused to respond. I'm not sure if it's real or not, but it might be fun to research.
It's always a good idea to keep a tarpaulin or two around sensitive electronic equipment.
My experience goes the other way, though. Back in the days when computers weighed 30 tons, and were water cooled, one of ours popped one of the elbows in the water cooling supply. The people from below called up, wanting to know why water was coming through their ceiling. It seems that the large and VERY expen$ive computer had lost its water cooling supply, and it was feared that the CPU may have melted down. Fortunately, due to the panicked call from below, the machine was saved. There was still one h*ll of a mess to clean up in the raised floor area, though.
Had that happen to a cow-orker once. She put a 591 milliLiter (20 fluid ounce) screw top bottle of Pepsi in her bag with her laptop, without adequately securing the top. Somewhat surprisingly, the machine lasted long enough to extract critical data from the hard disk before it went casters-up. Fortunately, I had a sufficiently large USB flash key to contain the data. Moral of the story? Don't carry drinks in the same bag as your laptop. And, carry a large USB flash key, too. Oh, and something about remembering to back up your data occasionally.
P.S. I'll get my coat. It's the one with the 64GB USB flash key in the pocket (with the contents encrypted, of course!).
There is the concept of "Jury Nullification", where the jury knows that a defendant is guilty, but decides to acquit him anyway. It's not a well known concept, and quite a few judges/prosecutors/governments/etc., wish that it didn't exist (so much so that any discussion of it can result in a mistrial!). But, nevertheless, it does exist:
Of course, the problem is that there's no guarantee that any particular jury will even know of that concept, let alone apply it.
One the basic tenets of western justice is that the punishment should fit the crime. Thus, I have no problem with the idea of Edward Snowden returning to the USA, facing a fair trial, and serving the 15 minutes of jail time that he deserves.
Ah, yes, the "Castle Bravo" effect:
One presumes that they've also tried Lithium Trinitide as well as Lithium Deuteride, although I couldn't find any references while doing a very quick search. ("Hi guys/gals!" I always include a friendly greeting to any spooks who may be reading my stuff, based on selected/sensitive keywords.). Then, again, most aspects of nuclear weapon design are somewhat classified, well, excepting for all of that design information on wikipedia/wikileaks/etc. :-/
Liquid fueled rockets are not necessarily easy to build, and even harder to control. An alternative approach, using a hybrid liquid/solid fuel design has some advantages. One such rocket, based on asphalt (Yeah, the same stuff they pave roads with.), and Nitrous Oxide (Hehehe!) has been flown successfully:
As for anyone attempting this in the USA, be aware that there are some VERY serious regulations that the FAA and State Department have for flying such rockets Special approvals (e.g., waivers) must be obtained well in advance of the flight, as well as notifying Air Traffic Control (ATC) centers of the impending launch, flight, and disposition of the vehicle, just so that no airliners happen to be in the flight path. And, failure to follow those procedures can subject one to some rather incredible fines, imprisonment, as well as some serious probing.
But, otherwise, keep reaching for the stars.
P.S. Oh, yeah, make sure you know where the closest burn treatment center is located, and have plotted the quickest route to it.
I'd rather them blow tax money on Orion, where it'll mostly flow back into our economy and will advance science and technology, than give it away to various foreign countries and wasted military campaigns!
Well, the oceans are pretty big. Actually, they're really, really, really HUGE. So, the chance of two cables crossing anywhere near a break is pretty small. It's not really quite so bad as some of the area under the raised floor of some of the old mainframe computer rooms, where the cables were so intertwined that you never removed an old cable, for fear of damaging the other cables (Snakes! They look like snakes!).
Most of the breaks seem to happen near shore anyway, usually where some drunken ship's captain has dropped anchor on top of a cable, or snagged one. Out in the open ocean, away from the continental shelves, the cables are usually so deep that anchors and such can't reach then (You won't find a ship with an anchor chain much longer than a few hundred feet at most.).
There may be some breaks due to undersea boulders falling off of undersea cliffs and landing on the cable, but those tend to be somewhat rare. There may also be some where the cable is stressed as it crosses an undersea rift of cliff, but, again, those are pretty rare, too. In past times, there were some incidents of sea-life trying to eat the cables, but most modern cables are pretty resistant to that. More likely, though, is that a cable may have swayed in the current, and abraded itself against a hard, sharp object, which has damaged the cladding/insulation/etc. Once sea water has leaked inside, all sorts of bad things can happen, especially given the voltages involved (e.g., electrolytic corrosion), as well as damaging the fiber itself (Water does nasty things to glass fibers, via Hydrogen/Hydroxide contamination.).
Or, something like that.
P.S. I'm afraid we have more to fear from the bunglings of the incompetents, than from the machinations of the truly evil.
What is this "maintain the phone booths" item you speak of? Are you sure that it exists in this Universe?
Latest news indicates one fatality and one injury. :-(
Designing rocket engines is hard. VERY hard. You have to mix very a very volatile fuel and oxidizer in the combustion chamber thoroughly to ensure complete combustion. And, you have to do this at some rather incredible temperatures, temperatures which are very close to the melting point of even the most refractory materials. And, these refractory materials have to withstand some fairly high pressures, and are subjected to extreme temperature changes. Plus, the chamber material has to withstand both fuel and oxidizer materials without reacting to either one. Now, couple this design with the fact that the fluid dynamics of rocket chamber combustion isn't a well understood science (definitely not well enough to adequately computer model), and the fact that instabilities can build up such that the combustion process goes non-linear and starts to pulse or vibrate, which can stress those refractory materials well beyond their limits, and the end result is that it's VERY hard to design a new rocket engine. Furthermore, rocket engine designs don't necessarily scale very well, which means that the only way to design a new rocket engine is to build a full size model and empirically test it. But, even static testing can't try all of the conditions that a rocket engine will encounter during its flight. So, it's not too surprising that even a tried and proven 50 year old design may encounter some conditions which cause it to go BOOM in a most unpleasant way. :-/ Rocket science is HARD.
How much analysis does it take to determine that a person is posting yet another crazy cat video to a social networking site?
Any discussion of the Espionage Act of 1917 should also include the Sedition Act of 1918 (which was really just a modification of the Espionage Act of 1917). That made certain types of speech illegal. Somewhat surprisingly, it was upheld by the Supreme Court, although some subsequent decisions make it unlikely that it would be used again.
The conductive grease sounds like a good idea. Note that Copper oxidizes, producing Copper Oxide (I or II), which is either non-conductive, or a semiconductor. The conductive grease should prevent the oxidation. One could also get fancy and Silver plate the interior of the Copper tubes (Silver Oxide is a conductor); consider some of the electroless Silver plating solutions, which will deposit a few Angstroms of Silver (Cool-Amp is one maker (I have no connection, etc.).).
You might also consider ensuring that the end of the Copper tube has a slight flare to it, or, at least, is deburred. Cutting Copper tubing tends to produce a burr, or slight squeezing of the tube at the cut point, and, if you're counting on a dependable release, you don't want anything binding at the end of the Copper tube.
You could also consider some type of spring contact that would be inserted in the Copper tube. I'm thinking of something along the lines of a piece of Beryllium Copper that is folded and soldered to the wire.
Good luck with it!
P.S. Remember that any landing you can walk away from it a success.
47CFR97.113(4) still prohibits encrypted communications on the amateur radio bands in the US:
"(4) Music using a phone emission except as specifically provided elsewhere in this section; communications intended to facilitate a criminal act; messages encoded for the purpose of obscuring their meaning, except as otherwise provided herein; obscene or indecent words or language; or false or deceptive messages, signals or identification."
Thus, anyone using encrypted communications would quickly find their connection dropped (if they were using someone else's node), or would be quickly triangulated and reported. Amateur radio operators are VERY protective of their bands and privileges.
Now, it might be possible to use some of these techniques on some of the ISM bands (47CFR18):
or, maybe even using the limitations in Part 15 (47CRF15):
And, of course, they could definitely be used up in the "uncontrolled" RF spectrum space (which is most of the way up to infrared now).
However, some of the things they'll be fighting are, with conventional radio equipment, they'll either be seriously limited to their data rate (2400 bits per second for unmodified VHF/UHF radio equipment, closer to 300 bits per second for unmodified HF radio equipment). Or, they'll be seriously limited in their range (for VHF/UHF/microwave/infrared bands). There's a bit of trade-off involving data rate and distance/power; for example, some of the QRSS techniques allow for minimal power for extreme distances, but at the expense of data rate (1 bit per second or less?).
Still, I think they're thinking that radio equipment can't be easily located, which is obviously false. Foxhunts (e.g., searches for hidden radio transmitters) typically take less than 30 minutes for a well trained team (and, there are a LOT of well trained teams out there). Even mobile transmitters can be pretty quickly located. I've seen some amateur automated bearing location equipment which will provide the bearing to a signal in well under one second (which allows for a dynamic, real time bearing, even for a moving transmitter).
Plus, there's a technique of performing "RF fingerprinting" of a transmitter's output that allows it to be uniquely identified (e.g., signal rise time, quiesce time, noise characteristics, etc.). Heck, for that matter, there has even been quite a few successes locating receivers, via their local oscillator radiation (e.g., British TV locator vans, radar-detector-detectors, etc.).
Thus, before Anonymous puts too much credence in this approach, I think they need to do a bit more research of just how many holes there are in it. Yeah, tracking down such an RF link may require that some people get out of their easy chair to locate them, but it's certainly possible (and, when you make those bureaucrats get out of their easy chairs, well, they're not going to be happy!). ;-)
Oh, yeah, ditto the comments about the US$10,000 fines, per day, for unlicensed radio signals. I saw a news article just yesterday where the FCC imposed a US$46,000 fine for a violation. You REALLY don't want to get them mad at you!
Ah, yes, recycling bottles. It they were serious about that, then they'd make bottles with a 12 inch opening instead of those little half-inch openings. After all, it's devilishly difficult to hit a half-inch opening to refill them after you've consumed the contents. ;-)
P. S. I'll get my coat. It's the one with the "dry" pockets.
Oh, isn't this what's called Poetic Justice? ;-)
Where is Frank Church when you need him?
Oh, and haven't we all been here before already?
Quis custodiet ipsos custodes?
P.S. For those that don't read Latin: http://en.wikipedia.org/wiki/Quis_custodiet_ipsos_custodes%3F
P.P.S. I'll get my coat. It's the one with the listening device in the pocket.
Could this be a version of Darwin's Law in action?
More information on fusors can be found here:
And, agreed on the availability of Deuterium. It used to be pretty common for physics students to make ice from heavy water (Deuterium Oxide) to put in drinks. The Deuterium, being slightly heavier than Hydrogen, causes the ice cubes made from it to sink rather than float (And, no, I don't think I'd drink one of those drinks, although several people have. And, there's some evidence that a slight concentration of Deuterium may actually help memory, although too much of it may be fatal.).
P.S. I'll get my coat. It's the one with the heavy ice cubes in the pocket.
Why? The whole premiss of Facebook is based on advertising. But, who wants to advertise to a civilization that doesn't have any money to spend on the advertised products?
Or, maybe the advertising isn't about physical products, but ideology? Oh, sure, that'll go over well when the advertising prompts the next revolution. How long until some administration starts buying obsolete microwave ovens, removing the doors/interlocks, and starts beaming interference up to those planes? :-(
Plus, what happens when the batteries on one of those birds deteriorates just a bit, and allows it to drop down into a commercial air traffic corridor, taking down a commercial airliner in the process? Can you say "Liability"? I bet there are a LOT of lawyers that can! US$60M? That'll be a drop in the bucket when the suits are finally settled.
Decades ago, our group moved into a set of temporary trailers, while a building was being renovated for us. A year and a half into the six month stint in the trailers, I was able to upgrade my office from an interior office to an office with a window, and <gasp> a thermostat. No more suffering from a horribly cold or a horribly hot office (usually at different points during the same day). Life was good...for about two hours. Then, the endless stream of people along the same duct started showing up, complaining that their office was too hot/cold, and could I please increase/decrease the thermostat. I finally decided that the best way to handle this was to let them fight it out outside my office door (and, make a small fortune selling tickets to the fights!). Eventually, we were moved out of the temporary trailers (We were only in them for about 6.5 years of the six month period.), and, as they were demolishing the trailers (or, should I say, finishing demolishing them, since they were pretty well demolished by the time we moved out of them anyway), they discovered that the heating duct attached to the heat-pump controlled by the thermostat on my office wall had never been attached to anything!
P.S. True story!
P.P.S. I'll get my coat. It's the one with the thermal lining and ice in the pockets.
P.S. I'll get my coat; it's the one with the bottle of Mercaptans in the pocket.
For a better approach, why not use Ethanol and Dry Ice? (And, if things get too bad, the techies can resort to drinking the coolant!). Note that this isn't unprecedented (Err, the Ethanol and Dry Ice, not necessarily the techies drinking it, although that has been known to happen, too!).
There are some mainframe manufacturers who have resorted to using Helium as a cooling agent (e.g., "TCM"). Plus, there has been some work done on using Liquid Nitrogen immersion as a cooling agent for overclocked systems.
Large electrical generators are frequently cooled by Hydrogen gas (It has a low viscosity, so as to not interfere too much with the rotating components, and conducts heat well. Of course, one has to have a very good seal on the bearings, else one runs the risk of the "Hindenberg Effect".).
P.S. I'll get my coat; it's the one with the Kentucky bourbon and Dry Ice in the pocket.
Oh, you mean the Aurora:
And, don't forget that, when the engines started, they blew green flames out the back.
They have an SR-71A at the National Museum of the US Air Force in Dayton, Ohio, USA:
I met one of the SR-71 pilots a number of decades ago, Major Brian Shul, and even got him to autograph a copy of his first book "Sled Driver". His story is quite an interesting one:
And, how many of those (L)users actively suppress the ads, or passively ignore them? How many of those users have disposable income to blow on the advertised goods, versus being 12 year olds spoofing their age, and with no money? How many of those (L)users have the attitude that "I'd never buy anything from a company that advertises on a site like this!"
P. S. How long before FB succumbs to the dark side, and starts allowing pr*n images, to attract even more (L)users?
I just installed Firefox 23 this morning.
I haven't been able to print anything successfully since they took the IBM 1403N1 printer out. Now that was a printer!
P.S. I'll get my coat; it's the one with the print chain in the pocket.
Interesting comments, but maybe I can shed some enlightenment.
Note that most drive-through order systems require some way of sensing that a car is present (else the order taker has to listen constantly to noise in their headset). That may be via a magnetic loop sensor in the pavement. These are notorious for not sensing smaller vehicles, such as bicycles, motorcycles, and horses, as well as pedestrians.
As for taking a horse inside a McDonalds, there are usually (health department) restrictions that only service animals may enter. However, horses can be service animals!
P.S. I'll get my coat, it's the western style duster, with big pockets that I can fill with burgers while riding my horse.
I always seem to get those terms, inside and outside, mixed up. After all, it's easy to get confused. Which side of the line am I standing on? Is that the inside or the outside? Isn't it all relative?
P.S. I also have trouble with the concept of left and right. Maybe that's why I had such trouble in kindergarten? ;-) I ought to be a shoe-in for a job with an intelligence agency!
P.P.S. I'll get my coat. It's the one that's inside-out (or, is that outside-in?).
Looks like the rest of FB users may be locked out now, too. It's throwing an error screen when I try to connect:
Sorry, something went wrong.
We're working on getting this fixed as soon as we can.
Facebook © 2012 · Help
I think Morgan Freeman would make a good doctor.
There are companies that can analyze/reverse-engineer a surprising number of "secure" chips. Here's one, for example:
And, while these guys are legit, there's probably dozens of illegit or university lab students who could/can/are doing the same thing.
P.S. Yeah, I've got some experience in the computer security field, too. Can't say what exactly, though. ;-)
V1s are, apparently, somewhat rare. There is one mounted on a pedestal outside of the courthouse in Greencastle, Indiana, USA:
I happened to be unaware of this fact, and, while driving through Greencastle one night, almost ran off the street from the amazement of seeing it!
I seem to remember that one technique for bringing down V1s was for a pilot to edge his plane close to one, and insert a wing under the V1's wing, and flip it. Apparently, the control system in the V1s wasn't able to cope with the device becoming inverted.
Originally written in memory of his girlfriend, who had just been killed in a plane crash in Canada. Later, it was given to Violette Szabo, for use by her while on assignment in occupied France (which, sadly, ended rather badly for her). :-(
I seem to remember that Hamburg and Dresden suffered a bit of "marshmallow roasting" from firestorms:
Of course, the Soviets had their own urban renewal plans for Berlin.
The problem is that, unless the two subcritical lumps are mechanically constrained when bumped together, the criticiallity will, almost certainly, mechanically separate them before an explosion can result. Remember the two "Demon Core" incidents, and how the two criticiallity incidents only killed two people:
P.S. I'll get my coat; it's the one with the Iodine tablets in the pocket.
Don't they know that they can't stop the Rise Of The Machines? Resistance is futile...
Of course, governments can promise that they won't design/build such machines. And, they'll stick to that promise, at least until they get wind that some other governmentis building such machines, at which point, an arms race in autonomous killing robots will occur.
P.S. I'll get my coat. It's the one with the badge that says "I welcome our new robot overlords".