Re:A couple of inovative ideas
on
Ultimate Sleds?
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· Score: 1
The battery thing would not do what you're thinking. It would decrease friction, unless he's sliding on an extremely thin layer of ice at near 0C. Instead, it would create a layer of water between the runner and the snow. If he cranked up the heat to try to burn in deeper, he'd be riding on a layer of vapor.
Sand might help, if it could be dropped right in front of the runner, but over time, this degrades thr run, and the runners.
The 2x4/nails idea is the right idea in general, but not the way you're implementing it. There's a good reason automotive brakes are pads pressing against a smooth surface with variable pressure instead of a tooth grabbing a cog. If you brake with a strong brake at the front, as you say, you'll do a 180, probably in the vertical plane. Also, sticking out there, that's just plain dangerous no matter what. use a good steerable runner sled. hinge the 2x4 hanging backwards from the front, sticking a couple of inches past the rear of the deck, but ending ahead of the runners. 2-1/2 inch nails through a 2x4 give you what, about 5/8 inch exposure? Now, as you near the bottom, if you can't turn sharply enough to slow and stop normally, (or maybe shoot on past or between the trees on to glory), you press down with your toes, ripping up a plume from the nails. If you need to ride feet-first for some reason, just add a vertical member on the board, so when you lean back, your back presses the board down. Of course, that'll entail shifting your weight rearward, thus diminishing your steering effectiveness, but again, if you're using brakes on a sled, you're probably on the verge of rolling off it anyway, so who cares how elegant it is.
I think of surgery as a fairly high-dexterity sort of thing. Unless this is some sort of mesh networking with LEOs, we're talking about >1sec latency at best. I have enough trouble just using vi over a 750ms latency link. It's not like you can just "q!" and start over.
Tantalum caps ARE electrolytic. It's just a solid electrolyte. I can't believe they're using water-based electrolyte, even in the "high-quality" stuff. This was just a bad copy of an "high-quality" water-based electrolyte, which is missing the additives that decrease hydrogen production, so the H2 doesn't diffuse away fast enough, and it pushes out liquid electrolyte. That means that even the good ones are slowly drying themselves out. Anybody know how long the proper ones are likely to live?
Umm... Have you no insight at all? Such a system would be completely pointless on short links. It'd be like taking an airline flight from Shedds aquarium to the Sears tower (to put it into your locale). It's for the long links. Big network, even fewer nodes than the airlines... NYC, CHI, DEN, LAX... maybe a few others. Hugely expensive and disruptive along its route. It'd go only over the extremely-high-traffic links.
I've been thinking about a system like this for a good 20 years now, so it's a good chance to karma-whore.
Of course the physical support system must be robust and redundant. Only maglev (of current technologies) can reliably handle the kind of speeds I'm thinking of (orbital velocity at the surface of the earth) for long distances. Thin steel wheels would be needed, but just for low-speed travel, and in catastrophes. Of course, the capsules would be carrying redundant air supplies, each with the capacity to complete the trip at steel-wheel speed, at least to the next station (in such a design, each link has probably only two stations anyway). If the maglev coils on one of the capsules burns out (that's about the only thing that could happen to make them fail, aside from the absence of the track), ALL of the capsules behind it in that link would have to drop to their wheels, or it would be like trying to fire a gun with a plugged barrel... not good for the barrel, nor the bullets. Then, the vacuum would be cracked at the originating end, sacrificing the hard-won vaccum for propulsion and safety. First would come a small release, which would not move the capsules much. Its primary purpose is to get some air between the capsules, and out in front, as well, for cushioning. You don't want to just slap them together at the speeds they'd build up accellerating with 15psi across their asses, all the way across the space between them. Instead, you start slowly, letting that one push the cars along slowly, while the air mostly leaks past them. You keep increasing the rate of intake, as that low-pressure wave shoots down the pipe. taking the simple case of only one car, depending on where it is along the way, you could probably just let the air in, as enough would leak ahead of it that toward the end of the trip, it would be compressing the air ahead of it, as a brake. Now, add a second car behind the one that failed. You just modulate the air intake so that the air he's compressing ahead of himself brings the one ahead of him up to a velocity small enough that physical contact is not catastrophic. Now, imagine a whole bunch of capsules in the line, arriving at the terminus almost like a regular railroad train. I'd expect they'd probably have some sort of coupling for this situation, so that a self-powered "locomotive" can come pick them up to complete the last few miles of the trip (want to leave some margin for error there at the end). When I first explained this sort of transport to my friends, most of them thought it was stupid to use linear motors, when you've got that big pressure differential, why not just let the air in? After explaining how hard it is go make a good vacuum down here, especially a big one, they'd suggest not evacuating it, and pushing the capsules along with pressure, which then brought back the explanation of why the vacuum's there in the first place(think of a sonic boom that can't disperse).
Back to the question: If they survive whatever made them stop, they are rescued somehow, or they die. What happens should a jetliner happen to malfunction? Maybe it can glide to a landing. Maybe that will be a safe landing, maybe not. Maybe that's not an option (think AA 587). My point is, every form of transportation has risks. I'd guess that the vacuum is the least of your worries when you're travelling at 2000M/S. I did some calculations on transit time for a system like this. I live about 2000KM from the rest of my family (makes for easier math). I'm no physicist, but if we went with a comfortable 1g accelleration for the entire trip, assuming (d/a)^^-1 = t, that 2000km trip would take 894 seconds, speeding up to the halfway point and slowing down to the end. Interestingly enough, dropping from 1g to 0.1g increases the trip to 1414 seconds, only about a 58% increase in time. Dropping to.01g stretches it out to only 4472. I just did a quick check, and airline flights from Denver to Indianapolis (the part of that route I could fly) take 2H21M(7221S). Pretty cool, eh? While a 1g linear motor would be tough to build that long, a.1g is much more reachable, and would provide power to the capsules continuously.
Obviously, at 1G, at least, you'd need some sort of swivels for the seats, and a brief respite as they swiveled at the middle of the trip.
personal items
another one would be where somebody needs for 50 people to read a spreadsheet, watch a video, etc.. rather than sending it by mail, with each person's copy taking up its space on the mail server, one copy for all is on the web(or ftp)server. They can save it or read it where it is, and it doesn't become part of their email cruft.
Using an instant messenger users can send files between each other without going through servers.
That part about not going through servers is why corporate users can't use IM to transfer files. We can get out only through a proxy. Chat through the https proxy is fine, but when it tries to open a direct client-to-client connection, there's no there there. Same for NAT, unless you open a passthrough, or maybe have the NAT server IM-aware, for incoming connections, at least, and chances are, both ends are behind firewalls. The passprotected url is the best way to go for big stuff, but to accomodate the non-technical, the only thing you can do is watch for the big ones, let them by, and personally approach them to get them off the servers once they're sent or received (depending which end you're on).
I hope you're just kidding. What you do is connect both systems to the disk array, using the card in each system as the terminator for the other.
The standby peer LEAVES THE DRIVES ALONE until the active peer becomes unreachable. then mounts the drives. In higher-end systems (maybe even lower... i just don't know how there), the card standing by actually talks to the active one, and down there on that level, they can ensure that only one adapter is using the disks. If the active adapter answers a poll, the standby refuses to become active.
Some drives, at least IBM SSA-attached ones, have 4 connections to each drive, bus A and B, port 1 and 2, I think was how they were named. These were usually attached multipath, so there was an SSA adapter on each end of the bus, in the same system. The second bus was either to a second pair of adapters in the same system, or in another system (or were unused). Serious redundancy, and with 4 paths to each physical disk, bus waits really weren't significant on reasonable-sized arrays. Anyway, as I said, you can do just the next level down with commodity SCSI hardware.
There are ways to have independent systems share physical disk concurrently, but last time I worked on one (mid-y2k), it was pretty kludgy and unreliable.
I can see it now...
Mr. Gates: Yes, we'll allow you to use the name "windows" to state that you include the windows drivers directly on the disk, assuming, of course, that your product "adds value" to match our standards. It's important to our customers that, for stability and compatibility sake, that there not be any possibility that the wrong OS driver be used, so the only driver on your rom must be the windows XP2003 incarnation. You can offer drivers for other operating systems, but only by postal mail, prepaid by the customer.
Here's the thread for this:
Lynn and others said the group's former method of electing five of the 18 board members over the Internet bogged ICANN down in debates that held up its main work -- making decisions that affect everything from how Web sites are named to how e-mail is sent.
Elected member: "We can't do that, it's wrong. They've been in business, since the great-great-grandfather arrived from Russia in 1830, and been shipping orders from their webpage since 1992!"
Appointed member: "There he goes again, bogging us down, holding up our main work"
A.M. 2: "We need to get on with transferring shapirosdelicatessen.com to Microsoft, since the new MS Delicatessen IDE is coming out next fall."
A.M. 3: "And don't forget, we've got to transfer cerf.net from that cybersquatter, Vint Cerf, Verizon, for their new C(entral) E(uropean) R(adio) F(requency) wireless broadband network."
Chairman: "Bailiff, remove him."
I've been a hired gun for IGS (IBM Global Services, the outside contracting arm). I'm probably not in the minority here. You know how they are with hourly billing stuff. The way to get ahead in IGS is to maximize your billable hours. Your greatest hotshot project manager had the internal nickname "the assassin", because she would get into a project and halt progress while dramatically increasing billable hours, sucking all the cash she could out of the customer, who got out of the contract as soon as they could, and she'd move on to a new one. We see the same sort of short-term thinking often in business. That Cringley story a few days ago (i can't find it.../. search is broken) gave a really nice analysis.
This kind of utility is going to allow the "service providers" to obfuscate the costs of the service, much the way fiber providers keep their "dark" lines secret, for negotiation purposes. Also, they will require some sort of compliance with their systems, allowing them to dictate what sort of software runs on their system, thus giving them the opportunity to insert inefficiencies there, too. Unless they can arrange to lock people into this model somehow, it'll never work. Nobody wants to let a vendor control both the rate and volume purchased. If they try to push customers into this model, maybe by restricting the availability of their hardware to outside customers, most will just migrate to another platform.
Re:Good sales process
on
Nosy Vendors?
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· Score: 2, Insightful
The article had nothing to do with open source, except for the word "linux". The salesman got panicky when he realized that this was really going to be what he considers a "server" sale, while he's getting only a workstation sale, because the customer is smart enough (including your help) to get what they need without paying the unconscionably inflated "business" pricing. This is not, as some have suggested, a support issue, either. If you use an unsupported operating system, and you come to Dell with OS-related issues, they are morally and legally right to tell you that it's no concern of theirs, just as if you wrote an application that didn't work. When we choose open source, we become our own support organizations. When the issues get over our heads, we find help. If the only help that works costs money, you pay what it takes, or you don't. If we can't handle that arrangement... well "we" is the wrong word. Opensource zealot or microsoftie, if you're still with me, you're not in that category.
and there is no place for a union in IT. We are professionals, as were public school teachers, before they were unionized. Unions can be beneficial in jobs that can be filled by just anybody. If you can be replaced by somebody who can be fully trained to take over from you and produce just as well as you, the next day, your employer is unlikely to restrain himself from abusing his position of power. In cases like that, the only way for the workers to have sufficient influence over the job is to pool their influence. It's unfortunate when they must do so, both for the employer, AND the employees. If management could have made work tolerable for the employees to where they didn't need to unionize, and management failed to take that action, they've just inserted massive inefficiencies and rigidity into their operation for no good reason. If management was unable to accomodate the employees demands because the business would not support it, there is now no way to save the business. For the employees (as a whole, not the first ones in), they are now stuck in a situation where the only way to advance is to wait their turn in the rigid union heirarchy, or move into management. Once you give up your right to negotiate for yourself, you are no longer a professional. It reminds me of the quote from Benjamin Franklin (often seen in.sigs), "Those who give up liberty for security deserve neither"(go ahead and correct me, I know I don't have it verbatim). However tempting it is, seeing the layoff axe swing closer and closer, minds strong and flexible enough to do what we do can't submit to chains.
I assume you mean satellite, but anyway...
Yes, something like this is used in space all the time. RTG, SNAP, whatever you want to call it, heat from decaying radioactive fuel heats one end of a bank of thermocouples, and the heat bleeds off the other end, to generate electricity. Both manned, and unmanned have used them.
Doesn't anybody remember when the logic-impaired Greenpeace types were whining about Galileo, with its RTG?
Anyway, I just want to point out that, at least from the article, this sounds like another non-news thing. unless it's considered a big deal to use natural hot and cold water for the temperature gradient.
Yeah, an unimportant mailbox was insecure, and somebody guessed the pass. It would be funny, perhaps, if the account had then been used to send out something along the lines of "All your base are belong to us!", but that's about the extent of its utility. It's a small-time hack, just like the ones that generated that famous phrase. Now, if somebody were to hack his systems in such a way as to set detonate one of his sarin bombs while he's present, THAT would be a big deal, though I'd prefer that he be the ONLY one present. I have nothing against his soldiers, and it will make me sad when we kill them. Let's hope they bring us his head to and just surrender. Good country, good people, evil overlord.
Damn. This'll undo two moderations, but I can't let this one lie.
do you really think there is just this dangerous gas ready to be released where you work Son, anywhere I work is a place where there is dangerous gas just waiting to be released, and it usually doesn't have to wait very long. Fortunately, the alarm is loud enough that fatalaties are rare, just the occasional nausea and vomiting. There are NO cases of long-term exposure.
OH MY GOODNESS! He's right! I just played "Frampton Comes Alive", and on one song, the guitar starts asking me whether I feel, and if I feel like it does, and telling me "that's all right", and "good night".... Creepy! And on "Mr. Blue Sky", on "Out of the Blue", the organ keeps subliminally talking about blue skies, just like the album title! Coincidence? I think not.
Interesting concept. I've seen it done before, and it's no more reputable now to snip a sequence of words from a sentence with one meaning, and present them alone, making it appear that something different was said. "I think all murderers should be sent out the door of an airliner at 5000 meters" becomes "I think all murderers should be sent out the door".
You don't need to migrate, just upgrade.From your article:
Defenses
Fortunately, there are several defenses which can be deployed to prevent most IPID-related attacks:
Network Administrators:
Configure your firewalls/border routers to deny incoming packets with bogus source addresses (eg. that appear to come from machines within your network, reserved IPs like 10.X.X.X or 192.168.X.X, localhost IPs 127.X.X.X, etc. Any good firewall guide should provide more detailed guidance on these essential rules.
Stateful firewall rules can also help against these sorts of attacks -- make sure your firewall offers this feature and that it is enabled.
Try to run operating systems with less predictable IP ID sequences, such as recent versions of OpenBSD, Solaris, or Linux. While these operating systems are immune from becoming zombies with the current version of Nmap, they may not stop all IPID-related attacks. Further investigation is needed.
It's nice of you to provide the answer in your question.
well, ok... the metal is not affected by magnetic fields, but the electrons in it are. you go whirling a magnetic field around one of those, and the induced currents will make it act like a magnet itself. This is how the speedometer in older american automobiles worked. there was a bar magnet spun by a flexible cable shaft from the output shaft of the transmission, which was thus proportional to wheel speed. This bar magnet sat inside an ALUMINUM cup, which was mounted in a spiral spring, like the balance wheel of a mechanical wristwatch. it created a torque in the cup, proportional to the speed of the magnet, not affected by temperature, humidity, etc.. It would not be very efficient, especially as a lot of the energy transferred would be thermal (I*I*R) instead of kinetic, but I wonder whether one could get the timing and rates proper to cause the cd to rip itself apart at the same instant that it evaporates, thus creating a low, flat disk of flaming destruction, maybe 10 feet in diameter.
If you're morally squeamish, stop reading this now.
As others have mentioned, she's certain to be in contact with somebody. You probably know who. Bugs have been around for a long time, in many forms. Yes it's illegal, and invades their privacy, but *insert profanity here* them. There're pinhole cameras, microphones, phone taps... the list goes on. I'd think the ideal would be to install a laptop in their attic with 802.11, to monitor your inputs. You can then easily access your recorded data, reset, reconfigure, without regaining access to the building. Yes, getting your stuff in there in the first place is difficult and dangerous... and illegal. Use a cheap laptop, vampire it into an electrical circuit, use WEP, don't leave anything personally identifiable with it. Depending on the structure, you might be able to simply tap the phone from the outside, which would simplify things.
If you are certain... REALLY certain, that someone actually has direct, specific information, that will lead you directly to your child, without possibility of failure, you might consider using older technology to force that person to give you that information. Violence should be considered only if you are certain both that it will succeed, and that you will get away with it. You're no good to your child if you're in prison. I have no sympathy for your victim, because he is endangering your child by aiding and abbetting your ex's crime, and remember, at any point, he can avoid all discomfort and most inconvenience by providing you with the information you request. One word of warning. If you suspect your own sanity in any way, then don't trust your judgement on what someone knows or whether you can get away with extracting that information, OR even on whether you are in the right and your ex is in the wrong.
I used to be the lab tech in a lead smelter. One day, taking the temperature (about 680F) on a kettle of soft lead (non-alloyed), a refinery rat ran a forklift into the stack of pallets I was standing on, causing me to fall partway into the kettle. Fortunately, Most of my body was below the level of the rim, so I kind of landed on my upper ribcage. My left arm, holding the thermocouple, went in up to the elbow... for about 200 milliseconds.... It's amazing what terror can do for you. It was, as always, about 130 degrees in the refinery, plus, I'd been helping skim a kettle, so I was pretty sweaty. I ended up with a somewhat pink arm with silvery, lead-covered hairs, and a melted thermocouple handle. The refinery supervisor joked that he was afraid they'd have to do a "de-shit" treatment on that batch. It didn't even merit an incident report. The whole place was a death trap. It was pretty common to have one guy point out to another that he was on fire, and have the burning man ask to be put out, because he had his hands full. Quite a place.
it's not as bad as you'd think, though. Our bodies are relatively OK with HCl, in small quantities, for short durations. Ever choke on your own puke? I do, a couple of times a year. I've got reflux, well controlled, but occasionally, I wake up very unpleasantly. Our stomachs put together a pretty decent mixture. Not tremendously high molarity, but still strong stuff. Short exposure to vapor will let you heal soon.
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The battery thing would not do what you're thinking. It would decrease friction, unless he's sliding on an extremely thin layer of ice at near 0C. Instead, it would create a layer of water between the runner and the snow. If he cranked up the heat to try to burn in deeper, he'd be riding on a layer of vapor.
Sand might help, if it could be dropped right in front of the runner, but over time, this degrades thr run, and the runners.
The 2x4/nails idea is the right idea in general, but not the way you're implementing it. There's a good reason automotive brakes are pads pressing against a smooth surface with variable pressure instead of a tooth grabbing a cog. If you brake with a strong brake at the front, as you say, you'll do a 180, probably in the vertical plane. Also, sticking out there, that's just plain dangerous no matter what.
use a good steerable runner sled. hinge the 2x4 hanging backwards from the front, sticking a couple of inches past the rear of the deck, but ending ahead of the runners. 2-1/2 inch nails through a 2x4 give you what, about 5/8 inch exposure? Now, as you near the bottom, if you can't turn sharply enough to slow and stop normally, (or maybe shoot on past or between the trees on to glory), you press down with your toes, ripping up a plume from the nails. If you need to ride feet-first for some reason, just add a vertical member on the board, so when you lean back, your back presses the board down. Of course, that'll entail shifting your weight rearward, thus diminishing your steering effectiveness, but again, if you're using brakes on a sled, you're probably on the verge of rolling off it anyway, so who cares how elegant it is.
I think of surgery as a fairly high-dexterity sort of thing. Unless this is some sort of mesh networking with LEOs, we're talking about >1sec latency at best. I have enough trouble just using vi over a 750ms latency link. It's not like you can just "q!" and start over.
Tantalum caps ARE electrolytic. It's just a solid electrolyte. I can't believe they're using water-based electrolyte, even in the "high-quality" stuff. This was just a bad copy of an "high-quality" water-based electrolyte, which is missing the additives that decrease hydrogen production, so the H2 doesn't diffuse away fast enough, and it pushes out liquid electrolyte. That means that even the good ones are slowly drying themselves out. Anybody know how long the proper ones are likely to live?
Umm... Have you no insight at all? Such a system would be completely pointless on short links. It'd be like taking an airline flight from Shedds aquarium to the Sears tower (to put it into your locale). It's for the long links. Big network, even fewer nodes than the airlines... NYC, CHI, DEN, LAX... maybe a few others. Hugely expensive and disruptive along its route. It'd go only over the extremely-high-traffic links.
I've been thinking about a system like this for a good 20 years now, so it's a good chance to karma-whore.
.01g stretches it out to only 4472. I just did a quick check, and airline flights from Denver to Indianapolis (the part of that route I could fly) take 2H21M(7221S). Pretty cool, eh? While a 1g linear motor would be tough to build that long, a .1g is much more reachable, and would provide power to the capsules continuously.
Of course the physical support system must be robust and redundant. Only maglev (of current technologies) can reliably handle the kind of speeds I'm thinking of (orbital velocity at the surface of the earth) for long distances. Thin steel wheels would be needed, but just for low-speed travel, and in catastrophes.
Of course, the capsules would be carrying redundant air supplies, each with the capacity to complete the trip at steel-wheel speed, at least to the next station (in such a design, each link has probably only two stations anyway). If the maglev coils on one of the capsules burns out (that's about the only thing that could happen to make them fail, aside from the absence of the track), ALL of the capsules behind it in that link would have to drop to their wheels, or it would be like trying to fire a gun with a plugged barrel... not good for the barrel, nor the bullets. Then, the vacuum would be cracked at the originating end, sacrificing the hard-won vaccum for propulsion and safety. First would come a small release, which would not move the capsules much. Its primary purpose is to get some air between the capsules, and out in front, as well, for cushioning. You don't want to just slap them together at the speeds they'd build up accellerating with 15psi across their asses, all the way across the space between them. Instead, you start slowly, letting that one push the cars along slowly, while the air mostly leaks past them. You keep increasing the rate of intake, as that low-pressure wave shoots down the pipe. taking the simple case of only one car, depending on where it is along the way, you could probably just let the air in, as enough would leak ahead of it that toward the end of the trip, it would be compressing the air ahead of it, as a brake.
Now, add a second car behind the one that failed. You just modulate the air intake so that the air he's compressing ahead of himself brings the one ahead of him up to a velocity small enough that physical contact is not catastrophic.
Now, imagine a whole bunch of capsules in the line, arriving at the terminus almost like a regular railroad train. I'd expect they'd probably have some sort of coupling for this situation, so that a self-powered "locomotive" can come pick them up to complete the last few miles of the trip (want to leave some margin for error there at the end).
When I first explained this sort of transport to my friends, most of them thought it was stupid to use linear motors, when you've got that big pressure differential, why not just let the air in? After explaining how hard it is go make a good vacuum down here, especially a big one, they'd suggest not evacuating it, and pushing the capsules along with pressure, which then brought back the explanation of why the vacuum's there in the first place(think of a sonic boom that can't disperse).
Back to the question: If they survive whatever made them stop, they are rescued somehow, or they die. What happens should a jetliner happen to malfunction? Maybe it can glide to a landing. Maybe that will be a safe landing, maybe not. Maybe that's not an option (think AA 587).
My point is, every form of transportation has risks. I'd guess that the vacuum is the least of your worries when you're travelling at 2000M/S.
I did some calculations on transit time for a system like this. I live about 2000KM from the rest of my family (makes for easier math). I'm no physicist, but if we went with a comfortable 1g accelleration for the entire trip, assuming (d/a)^^-1 = t, that 2000km trip would take 894 seconds, speeding up to the halfway point and slowing down to the end. Interestingly enough, dropping from 1g to 0.1g increases the trip to 1414 seconds, only about a 58% increase in time. Dropping to
Obviously, at 1G, at least, you'd need some sort of swivels for the seats, and a brief respite as they swiveled at the middle of the trip.
Like I said, I've thought about this a lot.
personal items
another one would be where somebody needs for 50 people to read a spreadsheet, watch a video, etc.. rather than sending it by mail, with each person's copy taking up its space on the mail server, one copy for all is on the web(or ftp)server. They can save it or read it where it is, and it doesn't become part of their email cruft.
Using an instant messenger users can send files between each other without going through servers.
That part about not going through servers is why corporate users can't use IM to transfer files. We can get out only through a proxy. Chat through the https proxy is fine, but when it tries to open a direct client-to-client connection, there's no there there. Same for NAT, unless you open a passthrough, or maybe have the NAT server IM-aware, for incoming connections, at least, and chances are, both ends are behind firewalls.
The passprotected url is the best way to go for big stuff, but to accomodate the non-technical, the only thing you can do is watch for the big ones, let them by, and personally approach them to get them off the servers once they're sent or received (depending which end you're on).
I hope you're just kidding. What you do is connect both systems to the disk array, using the card in each system as the terminator for the other. The standby peer LEAVES THE DRIVES ALONE until the active peer becomes unreachable. then mounts the drives. In higher-end systems (maybe even lower... i just don't know how there), the card standing by actually talks to the active one, and down there on that level, they can ensure that only one adapter is using the disks. If the active adapter answers a poll, the standby refuses to become active.
Some drives, at least IBM SSA-attached ones, have 4 connections to each drive, bus A and B, port 1 and 2, I think was how they were named. These were usually attached multipath, so there was an SSA adapter on each end of the bus, in the same system. The second bus was either to a second pair of adapters in the same system, or in another system (or were unused). Serious redundancy, and with 4 paths to each physical disk, bus waits really weren't significant on reasonable-sized arrays. Anyway, as I said, you can do just the next level down with commodity SCSI hardware.
There are ways to have independent systems share physical disk concurrently, but last time I worked on one (mid-y2k), it was pretty kludgy and unreliable.
I can see it now...
Mr. Gates: Yes, we'll allow you to use the name "windows" to state that you include the windows drivers directly on the disk, assuming, of course, that your product "adds value" to match our standards. It's important to our customers that, for stability and compatibility sake, that there not be any possibility that the wrong OS driver be used, so the only driver on your rom must be the windows XP2003 incarnation. You can offer drivers for other operating systems, but only by postal mail, prepaid by the customer.
Here's the thread for this:
Lynn and others said the group's former method of electing five of the 18 board members over the Internet bogged ICANN down in debates that held up its main work -- making decisions that affect everything from how Web sites are named to how e-mail is sent.
Elected member: "We can't do that, it's wrong. They've been in business, since the great-great-grandfather arrived from Russia in 1830, and been shipping orders from their webpage since 1992!"
Appointed member: "There he goes again, bogging us down, holding up our main work"
A.M. 2: "We need to get on with transferring shapirosdelicatessen.com to Microsoft, since the new MS Delicatessen IDE is coming out next fall."
A.M. 3: "And don't forget, we've got to transfer cerf.net from that cybersquatter, Vint Cerf, Verizon, for their new C(entral) E(uropean) R(adio) F(requency) wireless broadband network."
Chairman: "Bailiff, remove him."
I've been a hired gun for IGS (IBM Global Services, the outside contracting arm). I'm probably not in the minority here. You know how they are with hourly billing stuff. The way to get ahead in IGS is to maximize your billable hours. Your greatest hotshot project manager had the internal nickname "the assassin", because she would get into a project and halt progress while dramatically increasing billable hours, sucking all the cash she could out of the customer, who got out of the contract as soon as they could, and she'd move on to a new one. We see the same sort of short-term thinking often in business. That Cringley story a few days ago (i can't find it... /. search is broken) gave a really nice analysis.
This kind of utility is going to allow the "service providers" to obfuscate the costs of the service, much the way fiber providers keep their "dark" lines secret, for negotiation purposes. Also, they will require some sort of compliance with their systems, allowing them to dictate what sort of software runs on their system, thus giving them the opportunity to insert inefficiencies there, too. Unless they can arrange to lock people into this model somehow, it'll never work. Nobody wants to let a vendor control both the rate and volume purchased. If they try to push customers into this model, maybe by restricting the availability of their hardware to outside customers, most will just migrate to another platform.
The article had nothing to do with open source, except for the word "linux". The salesman got panicky when he realized that this was really going to be what he considers a "server" sale, while he's getting only a workstation sale, because the customer is smart enough (including your help) to get what they need without paying the unconscionably inflated "business" pricing.
This is not, as some have suggested, a support issue, either. If you use an unsupported operating system, and you come to Dell with OS-related issues, they are morally and legally right to tell you that it's no concern of theirs, just as if you wrote an application that didn't work. When we choose open source, we become our own support organizations. When the issues get over our heads, we find help. If the only help that works costs money, you pay what it takes, or you don't. If we can't handle that arrangement... well "we" is the wrong word. Opensource zealot or microsoftie, if you're still with me, you're not in that category.
and there is no place for a union in IT. We are professionals, as were public school teachers, before they were unionized. .sigs), "Those who give up liberty for security deserve neither"(go ahead and correct me, I know I don't have it verbatim). However tempting it is, seeing the layoff axe swing closer and closer, minds strong and flexible enough to do what we do can't submit to chains.
Unions can be beneficial in jobs that can be filled by just anybody. If you can be replaced by somebody who can be fully trained to take over from you and produce just as well as you, the next day, your employer is unlikely to restrain himself from abusing his position of power. In cases like that, the only way for the workers to have sufficient influence over the job is to pool their influence.
It's unfortunate when they must do so, both for the employer, AND the employees. If management could have made work tolerable for the employees to where they didn't need to unionize, and management failed to take that action, they've just inserted massive inefficiencies and rigidity into their operation for no good reason. If management was unable to accomodate the employees demands because the business would not support it, there is now no way to save the business.
For the employees (as a whole, not the first ones in), they are now stuck in a situation where the only way to advance is to wait their turn in the rigid union heirarchy, or move into management.
Once you give up your right to negotiate for yourself, you are no longer a professional. It reminds me of the quote from Benjamin Franklin (often seen in
You hoser! Take off, eh?
I assume you mean satellite, but anyway...
Yes, something like this is used in space all the time. RTG, SNAP, whatever you want to call it, heat from decaying radioactive fuel heats one end of a bank of thermocouples, and the heat bleeds off the other end, to generate electricity. Both manned, and unmanned have used them.
Doesn't anybody remember when the logic-impaired Greenpeace types were whining about Galileo, with its RTG?
Anyway, I just want to point out that, at least from the article, this sounds like another non-news thing. unless it's considered a big deal to use natural hot and cold water for the temperature gradient.
Yeah, an unimportant mailbox was insecure, and somebody guessed the pass.
It would be funny, perhaps, if the account had then been used to send out something along the lines of "All your base are belong to us!", but that's about the extent of its utility. It's a small-time hack, just like the ones that generated that famous phrase. Now, if somebody were to hack his systems in such a way as to set detonate one of his sarin bombs while he's present, THAT would be a big deal, though I'd prefer that he be the ONLY one present. I have nothing against his soldiers, and it will make me sad when we kill them. Let's hope they bring us his head to and just surrender. Good country, good people, evil overlord.
Damn. This'll undo two moderations, but I can't let this one lie.
do you really think there is just this dangerous gas ready to be released where you work
Son, anywhere I work is a place where there is dangerous gas just waiting to be released, and it usually doesn't have to wait very long. Fortunately, the alarm is loud enough that fatalaties are rare, just the occasional nausea and vomiting. There are NO cases of long-term exposure.
OH MY GOODNESS! He's right! I just played "Frampton Comes Alive", and on one song, the guitar starts asking me whether I feel, and if I feel like it does, and telling me "that's all right", and "good night".... Creepy!
And on "Mr. Blue Sky", on "Out of the Blue", the organ keeps subliminally talking about blue skies, just like the album title! Coincidence? I think not.
Interesting concept. I've seen it done before, and it's no more reputable now to snip a sequence of words from a sentence with one meaning, and present them alone, making it appear that something different was said.
"I think all murderers should be sent out the door of an airliner at 5000 meters" becomes "I think all murderers should be sent out the door".
Defenses
Fortunately, there are several defenses which can be deployed to prevent most IPID-related attacks:
Network Administrators:
It's nice of you to provide the answer in your question.
well, ok... the metal is not affected by magnetic fields, but the electrons in it are. you go whirling a magnetic field around one of those, and the induced currents will make it act like a magnet itself. This is how the speedometer in older american automobiles worked. there was a bar magnet spun by a flexible cable shaft from the output shaft of the transmission, which was thus proportional to wheel speed. This bar magnet sat inside an ALUMINUM cup, which was mounted in a spiral spring, like the balance wheel of a mechanical wristwatch. it created a torque in the cup, proportional to the speed of the magnet, not affected by temperature, humidity, etc..
It would not be very efficient, especially as a lot of the energy transferred would be thermal (I*I*R) instead of kinetic, but I wonder whether one could get the timing and rates proper to cause the cd to rip itself apart at the same instant that it evaporates, thus creating a low, flat disk of flaming destruction, maybe 10 feet in diameter.
If you're morally squeamish, stop reading this now.
As others have mentioned, she's certain to be in contact with somebody. You probably know who. Bugs have been around for a long time, in many forms. Yes it's illegal, and invades their privacy, but *insert profanity here* them. There're pinhole cameras, microphones, phone taps... the list goes on. I'd think the ideal would be to install a laptop in their attic with 802.11, to monitor your inputs. You can then easily access your recorded data, reset, reconfigure, without regaining access to the building. Yes, getting your stuff in there in the first place is difficult and dangerous... and illegal. Use a cheap laptop, vampire it into an electrical circuit, use WEP, don't leave anything personally identifiable with it. Depending on the structure, you might be able to simply tap the phone from the outside, which would simplify things.
If you are certain... REALLY certain, that someone actually has direct, specific information, that will lead you directly to your child, without possibility of failure, you might consider using older technology to force that person to give you that information. Violence should be considered only if you are certain both that it will succeed, and that you will get away with it. You're no good to your child if you're in prison. I have no sympathy for your victim, because he is endangering your child by aiding and abbetting your ex's crime, and remember, at any point, he can avoid all discomfort and most inconvenience by providing you with the information you request.
One word of warning. If you suspect your own sanity in any way, then don't trust your judgement on what someone knows or whether you can get away with extracting that information, OR even on whether you are in the right and your ex is in the wrong.
Obligatory relevant quote from a sci-fi show:
"The soul of the Nietzschean is this:
We are arrogant.
We are vain.
We are manipulative.
We are selfish.
And we love our children."
Drago Museveni, "Primary Reflections"
CY 8428
I used to be the lab tech in a lead smelter. One day, taking the temperature (about 680F) on a kettle of soft lead (non-alloyed), a refinery rat ran a forklift into the stack of pallets I was standing on, causing me to fall partway into the kettle. Fortunately, Most of my body was below the level of the rim, so I kind of landed on my upper ribcage. My left arm, holding the thermocouple, went in up to the elbow... for about 200 milliseconds.... It's amazing what terror can do for you. It was, as always, about 130 degrees in the refinery, plus, I'd been helping skim a kettle, so I was pretty sweaty. I ended up with a somewhat pink arm with silvery, lead-covered hairs, and a melted thermocouple handle. The refinery supervisor joked that he was afraid they'd have to do a "de-shit" treatment on that batch.
It didn't even merit an incident report. The whole place was a death trap. It was pretty common to have one guy point out to another that he was on fire, and have the burning man ask to be put out, because he had his hands full. Quite a place.
it's not as bad as you'd think, though. Our bodies are relatively OK with HCl, in small quantities, for short durations.
Ever choke on your own puke? I do, a couple of times a year. I've got reflux, well controlled, but occasionally, I wake up very unpleasantly. Our stomachs put together a pretty decent mixture. Not tremendously high molarity, but still strong stuff. Short exposure to vapor will let you heal soon.
They should add a logo of a pen behind bars, then, it can be the pen jail, or in older english pen "gaol" (like Reading Gaol).