I applaud Real for releasing their server in this fashion.
Now, when the client for Linux will actually work with Mozilla, will actually play content that is available without generating spurious "You need to be root to update this" messages, and is actually easily found on the main Real site without resorting to using Google, then perhaps I might get excited about this.
But a server without a client is nigh useless. And if you want to say "But the client for Windows works great" - yes, but then so does Windows Media Player, and it comes pre-installed.
Not quite. For example, I have financial records going back more than the seven years required by the IRS. I currently am not under investigation by the IRS. I shred all records older than seven years.
Is that obstruction of justice? No.
Now, let us suppose that I know that I will be getting a visit from the IRS tomorrow, and I suspect that they will want all my records. I shred them. That is dangerously close to obstruction of justice - the procecution could make the case that I knew what was coming and shredded them simply to avoid giving them to the IRS. And of course, were I served formal notice that the IRS was going to investigate me, then any shredding would definitely be obstruction of justice.
Notice how I put the situation - you encrypt the logs for security. Should you need access, you send them off.
Now, you get served. You co-operate fully - you turn over the logs, you give them the name of the party in East Elbonia, you give them his contact data. You are co-operating fully with them.
Your friend in East Elbonia may not be, but that is out of your control. YOU are not obstructing justice.
Yes, it is a fine line. But that is one of the reasons to have a lawyer.
Never record anything you wouldn't want on the 6:00 news.
Anything you write down, record on tape, commit to a file on your computer, or store in any way other than in the meat between your ears can come back to haunt you.
Verizon should make sure they log as little as possible - keep IP to User ID logs for not more than a day, don't log ANY actions of your proxy servers, and so on.
Then, when the *AA comes and says "We need all your logs for the past week so we can find this pirate", Verizon can say "Here's all the logs we have - the last 23 hours. Cheers!"
If you absolutely feel you must have the possiblity of accessing logs older than that, then encrypt them with a public key. Let the private key be held by an individual in another country. If you need to access the logs, you mail the encrypted log to him, he decrypts it and sends it back.
Then if you are served, you give the logs to the nice officers, and then tell your friend that you have been served. Then, even if you want the logs decrypted, your friend won't.
Let them go to East Elbonia if they want the logs decrypted.
XO doing well - Well of course they are doing well - they have been going nuts signing up major spamhausen, and protecting the ones they already have. Easy to make more money when you are able to charge 3X the going rate to insure your spammer customers don't have to suffer the pain of disconnection.
PCI spec - Translation - "BOY OH BOY did we step in it! Jeez who'd'a thunk that this would piss so many people off! OK, we are making nice now, stop flaming our servers!"
Finnish Nannys Question - if they sing a song for which copyright has expired, do they have to pay? "All right kids, from the top: There's a nice wee lass, her name's Mary Mack..."
SCO charges IBM, not RH or others... OK, so screwing some people is OK, so long as it isn't me?!?! It would be funny if IBM bought SCO and then freed the IP...
Crashing cars into the desert So, we are going to protest wastefulness by wasting vehicles.... ???
I travel a lot - my preferred mode of vacationing is to drive somewhere - usually about 2Kmiles/trip.
As a result, I keep my car in top trip-ready shape at all times - tire tread a bit thin? Replace it. Keep the glass clean, keep the cooler chest ready, have a set of toothbrush/hair brush/deodorant/etc. ready to save on packing. Have trips planned out so that if an opportunity presents, I roll.
One of the TOP items on my list is maintaining my car's MP3 player - 30G of (legally owned and ripped from my own CD's/tapes) music, books on tape, stories, comedy routines, etc. There have been times when it's been down, and I've had to travel, or when I've had to travel without it (by train, plane, or rental truck).
I forget just how bad broadcast radio is until I have to travel without my music. Then I am shocked back into reality.
It's not just the fact that the DJ's seem to think the reason we listen to the radio is to hear them - if I wanted to hear self-important idiots blather, I'd listen to children's band (chicken band, or CB). If I wanted to hear a station claim "... KRAP, bringing you another 90% music hour...." (which they do by overlaping the songs enough to have 54 minutes of songs played in 30 minutes of wall-clock time), or if I wanted to hear commercials... well, a 9mm Hydroshock to the roof of the mouth would be a preferable "cure" to that brand of insanity.
I have a saying - "Anytime the consumer and the customer are not one and the same, you are going to get crappy quality." Dogs don't buy dog food, so the actual flavor does not matter - can you convice the owner to buy the food? The consumer of broadcast radio is the listener, but the customer is the advertiser. Advertisers don't care about the quality of the music, only that the station in question has a listenership, which you can get by being a monopoly as readily as by being a quality station.
My advice to anyone is:
1) Get some form of portable, hard drive based MP3 player - a Neo, an iPod, roll-your-own, whatever. 2) Load it up with your music, but even more importantly, with non-music stuff - buy the HHGTH series on CD, and rip that. Get your old Bill Cosby/George Carlin/* albums, and rip them (and for voice comedy, you can rip to a pretty low bitrate). Get books on tape/disk, and put them on. Hell, record the audio off old Star Trek (TOS, not TNG/DS9/Crapager) - ST-TOS was more like a radio show with pictures than TV. 3) Get a weather band receiver for weather reports, a chicken band or amateur receiver for road conditions (for the latter, be licensed if you are planning on transmitting). 4) Mentally present the "digitus impudus" to the radio stations you see advertised along the side of the road.
Re:HOW THIS WORKS
on
Reflections
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· Score: 2, Interesting
You were close, but not on.
BLAST doesn't require the receivers to send anything back to the transmitter.
Instead, the receivers use several antennas to create a virtual antenna with great directional sensitivity. Then the receivers use the different reflections of the signal of interest to build up a signal to receive.
This gets tricky to describe without drawing on the wall, so bear with me.
Consider a receiver with 4 antennas at different locations - for the sake of discussion say a square 1 meter on a side. We will also assume 2 transmitters at different locations. The transmitters are on the same carrier frequency, but are transmitting different signals.
For the receiver, there will exist 4 signals (one for each antenna) from each transmitter, for a total of 8 signals.
The receiver creates a set of 4 phase shift networks, and sums their output.
For each transmitter, there will exist a setting of the 4 phase shift networks that will bring all the signals from that transmitter into phase, causing them to reinforce in the summing node. Since the other transmitter will not have the same phase relationship, its signals will not tend to add up. This gives the signal of interest more level than the signal not of interest.
Now, add in some buildings, mountains, lakes, and so on, to create multipath signals. Now the number of signals from each transmitter has increased manyfold. The more signals, the more attenuation the transmitter you are trying to ignore vs. the transmitter you are trying to receive.
However, to accomplish this you need to be able to shift the phase of your network by up to tens of milliseconds, with a resolution of tens of nanoseconds. If you are moving, you have to constantly evaluate how the received signal parameters are changing, and adjust your network accordingly.
And that is why this hasn't been done for RF. For ultrasound, you are looking at needing to delay seconds, with sub-millisecond resolution.
However, when CDMA was first conceived of, the hardware to implement it would have taken several tractor-trailers to carry around. Now it fits in your back pocket.
You can use ANYTHING on the Ham bands as long as: 1) YOU, the control operator, are licensed for that band. 2) The equipment you are using meets the part 97 emission requirements. 3) You are not violating any of the usage rules.
If you want to use a part 15 WAP on the ham bands, you are perfectly legal so long as the equipment isn't spraying all over the place, you properly ID every 10 minutes, you are not encrypting the traffic to prevent monitoring, you are not sending commercial traffic, etc.
The fact that the WAP is part 15 in and of itself does not matter.
That said, I don't know how you would meet the ID requirement - most WAPs don't know how to send Morse, and I don't think sending out an ICMP with your call sign embedded in it would be acceptable.
And so forth. In other words, they compose the keystrokes by using the ALT+number pad trick. This makes a bit of sense - that way they can guarantee that you will get the correct ASCII codes, no matter whether your keyboard is in QWERTY or Dvorac.
And this works quite well under a normal text mode console under Linux. Howerver, the X Windows System does not seem to honor the ALT+Numeric code approach, so the neutered 'Cat isn't as useful.
So, in this mini-Ask Slashdot - does anybody know how to get X to do the ALT+code mode?
This is NOT a jet fuel, this is a component of a rocket fuel.
In fact, jet fuel is highly refined kerosene, or what the Brits used to call "parafin oil" - because it is a relative of the parafin wax used to seal canning jars, and MAKE CANDLES!
This fuel is a solid form of parafin that, when combined with a liquid or gaseous oxidizer makes a rocket.
The idea is this:
a purely liquid fuel rocket has 2 liquids you have to handle, the oxidizer and the fuel (e.g. LO2 and kerosene, LO2 and LH2, etc.) That's twice as many hoses, twice as many turbopumps, twice as much to go wrong.
A purely solid fuel rocket has no liquids, but once lit off, it will burn until all the fuel is gone. You cannot throttle it down, stop it, or restart it - the best you can do is eject it.
A hybrid rocket uses a solid fuel and a liquid oxidizer. You can throttle it by varying the flow rate on the oxidizer. You can stop it, and restart it again. You still need some tubing for the oxidizer, and a turbopump, but only one.
However, I doubt the only reaction products from this are carbon dioxide and water - more likely you are going to get unburned hydrocarbons, carbon monoxide, carbon dioxide, and water.
Granted, that's nicer than what the SRB's on the Shuttle use - aluminum and ammonium perchlorate IIRC.
OK, first I suggest that you read a message CAREFULLY before replying.
My points were:
1) UNLIKE a a properly designed system (for which I used VME as an example), PCs are poorly designed for cooling. I then backed up my comparison with facts.
2) I pointed out that even in the presence of forced air cooling, PCs are poorly designed. I then gave facts.
You then responded, saying that rack mounted equipment had problems with heat dissipation when stacking high power output devices. NOTE that this has NOTHING to do with PCs, which is the subject we are discussing.
I then responded to your (off-topic) response, saying that in a rack mounted system there usually is a forced-air plenum between systems to alliviate the problem you raised (which, to restate the point again, was OFF TOPIC of what we were discussing, which was the poor design of PCs).
So you see, my points about forced air cooling in rack mounted equipment has NOTHING to do with my points about PC design - rather it is in response to YOUR comments about rack mounted systems. So you see, it it not I that cannot follow a chain of reasoning.
As to which components need convection cooling - RAMS, the North bridge chip, the South bridge chip, certain SCSI controller chips, in short just about any chip that has a clock needs cooling, but only the really high power chips get to have a fan and heat sink. And since there are a lot of stagnation points in a standard PC case (i.e. points where the force air convection fails to cause air flow, due to the poor design of the PC architecture (since that is what we are discussing)), those parts need all the convection cooling they can get.
Now, you may WORK on high wattage systems, but do you DESIGN them - do you do the heat flow equations, the air flow studies? Do you instrument a system with tens of thermocouples and monitor the system as you take it from -30C to +50C in a environment chamber? I do.
I would suggest that you go to your local community college and take a reading comprehension course. I would also suggest that you use the fact that/. shows you the person's post as you respond to make sure that the points you raise are actually points the person made.
No, because in a modern rack you have a plenum between sections, removing the air from the stack.
And rack mounted systems are different from home computer layouts.
AND the modern PC design still makes getting good airflow over all components difficult since there are almost no unobstructed straight line paths through the case.
AND you still benefit from convection, even in a forced air situation, as components in dead air (see point above) get convective cooling.
I work on equipment that pumps out the watts. Do you?
OT: Thermal management: PC design sucks...
on
New Generation of Cases?
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· Score: 5, Interesting
The design of the PC system SUCKS from a thermal management standpoint.
Look at the old VME systems (e.g. what is in use at a telephone switching office).
The backplane board is vertically mounted along the back of the enclosure, and the cards are ALSO vertically mounted into the backplane. Any plugs on each card are on the front of the card. One whole section of the bus is reserved for I/O connections, so standard connections are on the backplane.
As a result, natural convection can move air over the system. If you need forced air, you put a fan at the bottom of the system, pressurizing the cabinet - that way you are moving denser, cold air with the fan.
When the S100 systems came out, they almost got this right, but they put the backplane on the bottom, and mounted the cards vertically. As a result, you now have the backplane blocking natural convection. Plus, with the connectors on the BACK of the card, you have yet another impediment to air flow.
When the first PC was designed, they stole the design of the S100 bus systems in that regard.
Now, you have one of two options - the tower approach, with the main board vertical and the cards horizontal - so your GPU cooks in its own heat, and the cards block the natural airflow over the main board, or the desktop approach - where your cards are vertical, but your main board cooks.
All case designs for the PC are work-arounds for this rather BAD design.
And until the PC industry starts making a change, no case tricks will completely ease this.
That said, I must say these things:
1) That was possibly the BEST use of a Flash animation for a site I've seen in a long time. Rather than wasting my time with BS, they show me the case in operation. Bravo to the webmaster!
2) The case actually would solve one problem I have in my setup - with all the cables exiting out the back of the tower case, and the tower being in the bay in my desk, it is a bitch to get to them, and they tend to get nibbled on by the fans I've put at the back of the desk. This case, with the cards exiting from the side would avoid that.
This patch is nothing but a fancy vitamin pill. It won't "feed" you any more than a vitamin pill would. RTFA!
The only advantage this patch has is that it lasts many days - the idea being to prevent soldiers from coming down with beri-beri, scurvy, and other diseases due to lack of vitamins (which MREs are not exactly high in). If you can issue a soldier a patch every week,
a) You can quickly determine if the soldier is using it - "INSPECTION - Pruuu-zent PATCH!" This is harder to do with a pill. b) You only need worry about it once a week - for guys on long range patrol this simplifies life. In combat, simple is good.
For geeks driving a keyboard, just take your multivitamin every (virtual) morning, along with your coffee, and you will get the same effect.
Use your computer's printer port - 8 bidirectional lines you can wiggle to make things happen.
I'd suggest using solid state relays (SSR)'s - your printer port wouldn't drive a normal relay directly, but it could drive an SSR.
Either that, or use the printer port to drive a transistor, then use the transistor to drive the coil on a standard relay.
Don't forget to add a snubber network across the relay coil - either a diode or a capacitor. Otherwise the inductive kickback from the coil when you de-energize it could fry things.
It sounds like you have first-hand knowledge of this bunch!
What dismays me about things like this is that all too often alcohol seems to be a "stupidity enhancer" - I've seen people reach heights of stupidity that no amount of natural talent alone would be sufficent for - you have to have natural talent, work for years building that talent to its nadir, then chemically enhance it!
I just hope these guys realize that a far safer way would be to use copper tubing (like you use to plumb a refrigerator with an ice maker), scavenge the valves from fridge's with ice through the door, and generally use food grade stuff.
Thinking about it - I wonder how accurate their mixology is. I wouldn't exactly call a windshield washer pump a precise, repeatable delivery system. I'm assuming that they probably don't have any way to measure the volume delivered - just turn the pump on for X ms and hope for the best.
OK, so metrology is part of my work, but I cannot feel warm and fuzzy about such an uncalibrated solution (both meanings intended.)
Strapping a rocket to your back while wearing skis might also be considered ingenious.
That does NOT mean that it is not DANGEROUS.
Using a non-food grade pump to handle things you plan on ingesting is a bad idea. When the substance you plan on moving consists of one of the world's premire polar solvent mixes, it become downright DANGEROUS.
Sorry, but I used to design industrial robotics for a living - perhaps I am just a bit harder to impress than most.
I was more linking to provide people with the idea of what a peristaltic pump was, rather than suggesting that the items in that search should have been used.
Of course, we should save money every place possible.
So, instead of using real booze, let's use washer fluid - it's much cheaper. So what if you get sick? It was cheaper.
And we can use lead solder on copper pipe - that's cheaper, too.
</sarcasm>
Windshield pumps can leech all sorts of nasty stuff into the drinks - I would think that it would make the booze taste terrible (I wouldn't know, as I think ALL booze tastes terrible), and I know that some of the stuff that leeches would be toxic.
Besides, truly ingenious people could MAKE a peristaltic pump themselves.
Slashdot Mirror
I was talking about parts with over ten million gates.
Granted, the high-end Xilinx parts are expensive - but my point was that the core of this device is probably derived from the same technology.
And while the Virtex II parts may be US$3K today, they will fall, and they have plenty of oomph to do SMP designs.
Xilinx and IBM are teaming up to make an 10 million gate FPGA with multiple PowerPC cores on it (see this story) in ADDITION to the 10 million gates.
So, 1 chip and you could have an SMP PDA - do all the interfacing logic as part of the FPGA core. I suspect that is what this device is.
(Granted, the cores aren't floating point cores, more like what the Series 1 TiVO has, but still....)
I applaud Real for releasing their server in this fashion.
Now, when the client for Linux will actually work with Mozilla, will actually play content that is available without generating spurious "You need to be root to update this" messages, and is actually easily found on the main Real site without resorting to using Google, then perhaps I might get excited about this.
But a server without a client is nigh useless. And if you want to say "But the client for Windows works great" - yes, but then so does Windows Media Player, and it comes pre-installed.
Not quite. For example, I have financial records going back more than the seven years required by the IRS. I currently am not under investigation by the IRS. I shred all records older than seven years.
Is that obstruction of justice? No.
Now, let us suppose that I know that I will be getting a visit from the IRS tomorrow, and I suspect that they will want all my records. I shred them. That is dangerously close to obstruction of justice - the procecution could make the case that I knew what was coming and shredded them simply to avoid giving them to the IRS. And of course, were I served formal notice that the IRS was going to investigate me, then any shredding would definitely be obstruction of justice.
Notice how I put the situation - you encrypt the logs for security. Should you need access, you send them off.
Now, you get served. You co-operate fully - you turn over the logs, you give them the name of the party in East Elbonia, you give them his contact data. You are co-operating fully with them.
Your friend in East Elbonia may not be, but that is out of your control. YOU are not obstructing justice.
Yes, it is a fine line. But that is one of the reasons to have a lawyer.
Anything you write down, record on tape, commit to a file on your computer, or store in any way other than in the meat between your ears can come back to haunt you.
Verizon should make sure they log as little as possible - keep IP to User ID logs for not more than a day, don't log ANY actions of your proxy servers, and so on.
Then, when the *AA comes and says "We need all your logs for the past week so we can find this pirate", Verizon can say "Here's all the logs we have - the last 23 hours. Cheers!"
If you absolutely feel you must have the possiblity of accessing logs older than that, then encrypt them with a public key. Let the private key be held by an individual in another country. If you need to access the logs, you mail the encrypted log to him, he decrypts it and sends it back.
Then if you are served, you give the logs to the nice officers, and then tell your friend that you have been served. Then, even if you want the logs decrypted, your friend won't.
Let them go to East Elbonia if they want the logs decrypted.
XO doing well - Well of course they are doing well - they have been going nuts signing up major spamhausen, and protecting the ones they already have. Easy to make more money when you are able to charge 3X the going rate to insure your spammer customers don't have to suffer the pain of disconnection.
PCI spec - Translation - "BOY OH BOY did we step in it! Jeez who'd'a thunk that this would piss so many people off! OK, we are making nice now, stop flaming our servers!"
Finnish Nannys Question - if they sing a song for which copyright has expired, do they have to pay? "All right kids, from the top: There's a nice wee lass, her name's Mary Mack..."
SCO charges IBM, not RH or others... OK, so screwing some people is OK, so long as it isn't me?!?! It would be funny if IBM bought SCO and then freed the IP...
Crashing cars into the desert So, we are going to protest wastefulness by wasting vehicles.... ???
I travel a lot - my preferred mode of vacationing is to drive somewhere - usually about 2Kmiles/trip.
As a result, I keep my car in top trip-ready shape at all times - tire tread a bit thin? Replace it. Keep the glass clean, keep the cooler chest ready, have a set of toothbrush/hair brush/deodorant/etc. ready to save on packing. Have trips planned out so that if an opportunity presents, I roll.
One of the TOP items on my list is maintaining my car's MP3 player - 30G of (legally owned and ripped from my own CD's/tapes) music, books on tape, stories, comedy routines, etc. There have been times when it's been down, and I've had to travel, or when I've had to travel without it (by train, plane, or rental truck).
I forget just how bad broadcast radio is until I have to travel without my music. Then I am shocked back into reality.
It's not just the fact that the DJ's seem to think the reason we listen to the radio is to hear them - if I wanted to hear self-important idiots blather, I'd listen to children's band (chicken band, or CB). If I wanted to hear a station claim "... KRAP, bringing you another 90% music hour...." (which they do by overlaping the songs enough to have 54 minutes of songs played in 30 minutes of wall-clock time), or if I wanted to hear commercials... well, a 9mm Hydroshock to the roof of the mouth would be a preferable "cure" to that brand of insanity.
I have a saying - "Anytime the consumer and the customer are not one and the same, you are going to get crappy quality." Dogs don't buy dog food, so the actual flavor does not matter - can you convice the owner to buy the food? The consumer of broadcast radio is the listener, but the customer is the advertiser. Advertisers don't care about the quality of the music, only that the station in question has a listenership, which you can get by being a monopoly as readily as by being a quality station.
My advice to anyone is:
1) Get some form of portable, hard drive based MP3 player - a Neo, an iPod, roll-your-own, whatever.
2) Load it up with your music, but even more importantly, with non-music stuff - buy the HHGTH series on CD, and rip that. Get your old Bill Cosby/George Carlin/* albums, and rip them (and for voice comedy, you can rip to a pretty low bitrate). Get books on tape/disk, and put them on. Hell, record the audio off old Star Trek (TOS, not TNG/DS9/Crapager) - ST-TOS was more like a radio show with pictures than TV.
3) Get a weather band receiver for weather reports, a chicken band or amateur receiver for road conditions (for the latter, be licensed if you are planning on transmitting).
4) Mentally present the "digitus impudus" to the radio stations you see advertised along the side of the road.
You were close, but not on.
BLAST doesn't require the receivers to send anything back to the transmitter.
Instead, the receivers use several antennas to create a virtual antenna with great directional sensitivity. Then the receivers use the different reflections of the signal of interest to build up a signal to receive.
This gets tricky to describe without drawing on the wall, so bear with me.
Consider a receiver with 4 antennas at different locations - for the sake of discussion say a square 1 meter on a side. We will also assume 2 transmitters at different locations. The transmitters are on the same carrier frequency, but are transmitting different signals.
For the receiver, there will exist 4 signals (one for each antenna) from each transmitter, for a total of 8 signals.
The receiver creates a set of 4 phase shift networks, and sums their output.
For each transmitter, there will exist a setting of the 4 phase shift networks that will bring all the signals from that transmitter into phase, causing them to reinforce in the summing node. Since the other transmitter will not have the same phase relationship, its signals will not tend to add up. This gives the signal of interest more level than the signal not of interest.
Now, add in some buildings, mountains, lakes, and so on, to create multipath signals. Now the number of signals from each transmitter has increased manyfold. The more signals, the more attenuation the transmitter you are trying to ignore vs. the transmitter you are trying to receive.
However, to accomplish this you need to be able to shift the phase of your network by up to tens of milliseconds, with a resolution of tens of nanoseconds. If you are moving, you have to constantly evaluate how the received signal parameters are changing, and adjust your network accordingly.
And that is why this hasn't been done for RF. For ultrasound, you are looking at needing to delay seconds, with sub-millisecond resolution.
However, when CDMA was first conceived of, the hardware to implement it would have taken several tractor-trailers to carry around. Now it fits in your back pocket.
So, start searching for random strings, identify the servers that respond, and create a DNSBL to block them.
Create a DNSBL and get enough people to use it, and the problem solves itself.
You can use ANYTHING on the Ham bands as long as:
1) YOU, the control operator, are licensed for that band.
2) The equipment you are using meets the part 97 emission requirements.
3) You are not violating any of the usage rules.
If you want to use a part 15 WAP on the ham bands, you are perfectly legal so long as the equipment isn't spraying all over the place, you properly ID every 10 minutes, you are not encrypting the traffic to prevent monitoring, you are not sending commercial traffic, etc.
The fact that the WAP is part 15 in and of itself does not matter.
That said, I don't know how you would meet the ID requirement - most WAPs don't know how to send Morse, and I don't think sending out an ICMP with your call sign embedded in it would be acceptable.
I neutered my 'Cat, but it's usefullness is reduced by the way they work when neutered.
If you scan a barcode that reads "123", what the neutered 'Cat sends is:
Alt down, Numeric 0 down, Numeric 0 up, Numeric 3 down, Numeric 3 up, Numeric 1 down, Numeric 1 up, Alt up.
Alt down, Numeric 0 down, Numeric 0 up, Numeric 3 down, Numeric 3 up, Numeric 2 down, Numeric 2 up, Alt up.
And so forth. In other words, they compose the keystrokes by using the ALT+number pad trick. This makes a bit of sense - that way they can guarantee that you will get the correct ASCII codes, no matter whether your keyboard is in QWERTY or Dvorac.
And this works quite well under a normal text mode console under Linux. Howerver, the X Windows System does not seem to honor the ALT+Numeric code approach, so the neutered 'Cat isn't as useful.
So, in this mini-Ask Slashdot - does anybody know how to get X to do the ALT+code mode?
Giving money to the government is like giving booze to an alcoholic - it might SEEM like you are being kind, but you are not.
Since spammers try to hide who they are, getting them to register for a tax would be difficult at best.
A far better option would be to sell hunting licenses for them.
I know I'd sign up.
Enlarge your penis....
Enlarge THIS! BOOM!
Do remember that CO production goes UP as combustion temperature increases - lower temp combustion produces CO2, higher temp combustion produces CO.
I'd think this would burn pretty hot.
This is NOT a jet fuel, this is a component of a rocket fuel.
In fact, jet fuel is highly refined kerosene, or what the Brits used to call "parafin oil" - because it is a relative of the parafin wax used to seal canning jars, and MAKE CANDLES!
This fuel is a solid form of parafin that, when combined with a liquid or gaseous oxidizer makes a rocket.
The idea is this:
a purely liquid fuel rocket has 2 liquids you have to handle, the oxidizer and the fuel (e.g. LO2 and kerosene, LO2 and LH2, etc.) That's twice as many hoses, twice as many turbopumps, twice as much to go wrong.
A purely solid fuel rocket has no liquids, but once lit off, it will burn until all the fuel is gone. You cannot throttle it down, stop it, or restart it - the best you can do is eject it.
A hybrid rocket uses a solid fuel and a liquid oxidizer. You can throttle it by varying the flow rate on the oxidizer. You can stop it, and restart it again. You still need some tubing for the oxidizer, and a turbopump, but only one.
However, I doubt the only reaction products from this are carbon dioxide and water - more likely you are going to get unburned hydrocarbons, carbon monoxide, carbon dioxide, and water.
Granted, that's nicer than what the SRB's on the Shuttle use - aluminum and ammonium perchlorate IIRC.
OK, first I suggest that you read a message CAREFULLY before replying.
/. shows you the person's post as you respond to make sure that the points you raise are actually points the person made.
My points were:
1) UNLIKE a a properly designed system (for which I used VME as an example), PCs are poorly designed for cooling. I then backed up my comparison with facts.
2) I pointed out that even in the presence of forced air cooling, PCs are poorly designed. I then gave facts.
You then responded, saying that rack mounted equipment had problems with heat dissipation when stacking high power output devices. NOTE that this has NOTHING to do with PCs, which is the subject we are discussing.
I then responded to your (off-topic) response, saying that in a rack mounted system there usually is a forced-air plenum between systems to alliviate the problem you raised (which, to restate the point again, was OFF TOPIC of what we were discussing, which was the poor design of PCs).
So you see, my points about forced air cooling in rack mounted equipment has NOTHING to do with my points about PC design - rather it is in response to YOUR comments about rack mounted systems. So you see, it it not I that cannot follow a chain of reasoning.
As to which components need convection cooling - RAMS, the North bridge chip, the South bridge chip, certain SCSI controller chips, in short just about any chip that has a clock needs cooling, but only the really high power chips get to have a fan and heat sink. And since there are a lot of stagnation points in a standard PC case (i.e. points where the force air convection fails to cause air flow, due to the poor design of the PC architecture (since that is what we are discussing)), those parts need all the convection cooling they can get.
Now, you may WORK on high wattage systems, but do you DESIGN them - do you do the heat flow equations, the air flow studies? Do you instrument a system with tens of thermocouples and monitor the system as you take it from -30C to +50C in a environment chamber? I do.
I would suggest that you go to your local community college and take a reading comprehension course. I would also suggest that you use the fact that
No, because in a modern rack you have a plenum between sections, removing the air from the stack.
And rack mounted systems are different from home computer layouts.
AND the modern PC design still makes getting good airflow over all components difficult since there are almost no unobstructed straight line paths through the case.
AND you still benefit from convection, even in a forced air situation, as components in dead air (see point above) get convective cooling.
I work on equipment that pumps out the watts. Do you?
The design of the PC system SUCKS from a thermal management standpoint.
Look at the old VME systems (e.g. what is in use at a telephone switching office).
The backplane board is vertically mounted along the back of the enclosure, and the cards are ALSO vertically mounted into the backplane. Any plugs on each card are on the front of the card. One whole section of the bus is reserved for I/O connections, so standard connections are on the backplane.
As a result, natural convection can move air over the system. If you need forced air, you put a fan at the bottom of the system, pressurizing the cabinet - that way you are moving denser, cold air with the fan.
When the S100 systems came out, they almost got this right, but they put the backplane on the bottom, and mounted the cards vertically. As a result, you now have the backplane blocking natural convection. Plus, with the connectors on the BACK of the card, you have yet another impediment to air flow.
When the first PC was designed, they stole the design of the S100 bus systems in that regard.
Now, you have one of two options - the tower approach, with the main board vertical and the cards horizontal - so your GPU cooks in its own heat, and the cards block the natural airflow over the main board, or the desktop approach - where your cards are vertical, but your main board cooks.
All case designs for the PC are work-arounds for this rather BAD design.
And until the PC industry starts making a change, no case tricks will completely ease this.
That said, I must say these things:
1) That was possibly the BEST use of a Flash animation for a site I've seen in a long time. Rather than wasting my time with BS, they show me the case in operation. Bravo to the webmaster!
2) The case actually would solve one problem I have in my setup - with all the cables exiting out the back of the tower case, and the tower being in the bay in my desk, it is a bitch to get to them, and they tend to get nibbled on by the fans I've put at the back of the desk. This case, with the cards exiting from the side would avoid that.
FOLKS!
This patch is nothing but a fancy vitamin pill. It won't "feed" you any more than a vitamin pill would. RTFA!
The only advantage this patch has is that it lasts many days - the idea being to prevent soldiers from coming down with beri-beri, scurvy, and other diseases due to lack of vitamins (which MREs are not exactly high in). If you can issue a soldier a patch every week,
a) You can quickly determine if the soldier is using it - "INSPECTION - Pruuu-zent PATCH!" This is harder to do with a pill.
b) You only need worry about it once a week - for guys on long range patrol this simplifies life. In combat, simple is good.
For geeks driving a keyboard, just take your multivitamin every (virtual) morning, along with your coffee, and you will get the same effect.
Use your computer's printer port - 8 bidirectional lines you can wiggle to make things happen.
I'd suggest using solid state relays (SSR)'s - your printer port wouldn't drive a normal relay directly, but it could drive an SSR.
Either that, or use the printer port to drive a transistor, then use the transistor to drive the coil on a standard relay.
Don't forget to add a snubber network across the relay coil - either a diode or a capacitor. Otherwise the inductive kickback from the coil when you de-energize it could fry things.
It sounds like you have first-hand knowledge of this bunch!
What dismays me about things like this is that all too often alcohol seems to be a "stupidity enhancer" - I've seen people reach heights of stupidity that no amount of natural talent alone would be sufficent for - you have to have natural talent, work for years building that talent to its nadir, then chemically enhance it!
I just hope these guys realize that a far safer way would be to use copper tubing (like you use to plumb a refrigerator with an ice maker), scavenge the valves from fridge's with ice through the door, and generally use food grade stuff.
Thinking about it - I wonder how accurate their mixology is. I wouldn't exactly call a windshield washer pump a precise, repeatable delivery system. I'm assuming that they probably don't have any way to measure the volume delivered - just turn the pump on for X ms and hope for the best.
OK, so metrology is part of my work, but I cannot feel warm and fuzzy about such an uncalibrated solution (both meanings intended.)
I never said what they did was not ingenious.
Strapping a rocket to your back while wearing skis might also be considered ingenious.
That does NOT mean that it is not DANGEROUS.
Using a non-food grade pump to handle things you plan on ingesting is a bad idea. When the substance you plan on moving consists of one of the world's premire polar solvent mixes, it become downright DANGEROUS.
Sorry, but I used to design industrial robotics for a living - perhaps I am just a bit harder to impress than most.
I was more linking to provide people with the idea of what a peristaltic pump was, rather than suggesting that the items in that search should have been used.
Of course, we should save money every place possible.
So, instead of using real booze, let's use washer fluid - it's much cheaper. So what if you get sick? It was cheaper.
And we can use lead solder on copper pipe - that's cheaper, too.
</sarcasm>
Windshield pumps can leech all sorts of nasty stuff into the drinks - I would think that it would make the booze taste terrible (I wouldn't know, as I think ALL booze tastes terrible), and I know that some of the stuff that leeches would be toxic.
Besides, truly ingenious people could MAKE a peristaltic pump themselves.
There's a time to scrimp, and a time to spend.
This guy is using windshield washer pumps to move the fluids.
YUCK!
Sorry, I'd rather use something less likely to contaminate the fluid I was moving.
A peristaltic pump would be far better - you get volumetric measuring free, and you can use medical grade non-contaminating tubing.