3com makes an over priced "VoIP" system called the NBX 100. We got one of these for work and when we got a second office, we got another one. Its custom 486 pc like device that has all its devices hooked off a 10mb ethernet network. Its os is vxWorks. This seems to be a nice system for the geeky house if you can find one at a firesale. They have all the cool things like tapi so windows boxes and do stuff, they have pc soft phones. Of course they only support windows and won't desribe the packets that go over the wire (which aren't voip, but raw ethernet packets). I've got tcpdump and I'm slowly figuring out whats going on. The phones seem to be good but expensive and you want to keep them on their own port on a switch or at least away from links you want to be fast. For more details google for "nbx rant"
If the call manglers were so nice and stable, why did 5 of them hit my web server within days of code red? List price on a 25 station system at that time was somewhere in the range of US$40,000.
If you don't want all the fancy stuff, it does look like IOS will suport the voice cards on the smaller modems so a call manager isn't needed any more but it will take quite a long time to set up.
Is it science or just PR doubletalk? Assume that NASA finds some martin rat. What would happen when they anounce that to the world? The 1st thing that would happen is a large number of people inolved with the polically active religous right would be screaming because that didn't fit in with accepted values. Now what happens if you make a few bad science anouncements and have some one else counter them? Over time the religous nuts starts ignoring the blasphemy while others can get on with real science. The real world of science funing in the US demands appeasing many groups that don't want their tax money disproving their beliefs.
From what one of my clients tells me, lots of them have credit cards numbers. Its just they belong to other people. Something like 90% of their fraud comes from Inida and they sell a $7 product that is easy to pirate and still 9 out of 10 chargebacks come from Inida.
Early theorys described gravity acting like a wind that would blow you towards the ground. It was later extended to include a wind from all directions blowing at the same time. Newtons gravity theorys were based on this concept and it was a problem that lead him to the idea of intergration. The integration of a pushing wind with the earth blocking it was much more difficult than the integration of just the earth sucking and the result was a bit of math seen in modern physics books.
The biggest problem with the gravity pushes theory was that things in space would slow down over time. Also as you speed up, you would need more energy to keep accelerating. Low orbit wouldn't be zero G, but zero differential G. Depending on how fast the gravity wind was and its strength, their would be no way to exceed its speed. The early attempts to quantify it thought there would be no way for the wind to go through the entire earth so the force you feel was considered its maxium which made it hard to explain higher gravity area like the sun and Saturn. There were a few other problems with the idea as well and it went away with the acceptance of the modern theory.
If you take a pendulum clock and put it in a elevator, will it speed up as you go up? As your moving it will. This is true for what we would consider mechancial clocks (there are some designs that would run slower in a rising elevator).
They use cessium and rubidium clocks. The time time dialation isn't quite as predicted but it is there. I find it odd that if you take a physical sping model and shrink it down real tiny, make a clock out of it, you get the same effect as time dilation.
The GPS system opened many new questions which is why they are building gravity probe B which should launch early next year. One of the major people behind GPB is Dr Parkinson who also was one of the major people involved with GPS.
Nice math to back up thouse ideas. In fact thouse ideas are the math. The problem is reality is playing a slightly different game. This is why The Voyagers and Pioneer spacecrraft are slowing down as well as all the GPS sats. There is also that slight problem with pendulums and eclipses. But other than thouse things, GR gravity models work great.
When the Daily Rotten ran this story last week or so, they had a link to the site and the site seemed to be a pr0n linkage site. It might have been illegal for other reasons.
Don't be so hard on the Savior on a Stick people after all they are just sheep looking for a shepherd.
They got the whole virgin birth savor thing from Egypt. Osiris even did the whole resurrection thing but its not clear if he pulled it off by the 3rd day. It might have taken him many more.
Remember that the Jews about 0BC had some very strange beliefs about blood and sick people so their society would have made an outcast of just about anyone that could be in the health profession. The dead sea scrolls talk about a few groups that spent time in Egypt learning things like cures and stuff and they might have come back with much different views about just how dangerous blood is. About the only place in the modern world at the time that had ritual involving eating the body of the god or drinking the god's blood were in Egypt. Eucharist anyone?
As far as the raping little boys goes, it was common in many parts of the world as it was spread via the Greeks during their expansion and it was part of acient greek culture at the time and the Romans seemd to think it was a good idea and spread it even more. Does anyone know why the bits of the Dead sea scrolls that talk about this subject haven't been released by the vatican?
Since the Book of the Dead can only be copied by the proper people according to the law of many Pharos and that had explicit times (kind of like the Disney (c) extentions), is the catholic church in violation of copyright law? Maybe Egypt could sue in the world court and get some of its stuff back.
how about a script that goes through the output of netstat every 5 minutes and adds entries to a table. If that table shows its "interesting" traffic, then nail it with something like ipfilter or just set it to a null route. In the case of a dedicated hosted serer, stick in another ethernet card and route all the funny trafic to it and let the switch or router set it to something slow. Its amazing what a perl script, a setuid wrapper for route and a 10mb ethernet card will do.
Late this year, a few of my net acquaintances will be meeting in two spots (S. Africa & S. Australia) for the pending doom and end of the world... oh wait... its just a total eclipse.
There have been some examples where pendulums swing funny durring elipses. I want to see if I can recreate this and I'm looking for help to do it on the cheap. The current expirments show that a swinging uniform sphere will have some side forces on it. My problem is measuring things in the field. I can get temps to about.01C. I can get non-moving distances to about.1mm, I can get weight to about.1g but I can get time to a few nanoseconds so I need to devise and expierment that uses just time. I've been thinking that I can get a disk spinning, I should use a simple optical coupler (like whats in your mouse) and a good timing circut to get some very precise timings. Now if I can build a disk that is well balanced but non-uniform density, that means its angular speed should be effected by the same force thats pushing a pendulum slighty to its side. The problem is the pendulum will contine to rotate as the force is applied but my spinning device will only see the force when the force is applied to one side of the disk. The smaller the disk, the shorter this time is since the shadow of the moon is travling at a rate of about 500m/s. The phenomenon I'm looking for will happen twice for about.0002 seconds. If I miss it this time there will be another 7 chances over the next decade.
Years ago I was busy with a binary editor looking at wolf3d files. With my decoding and other peoples encoding the 1st level editors were done. Then other people saw our work and decided they could do better. A race was on to figure out all we could. It was interesting that at the time there were some very nasty notes from developers at id complaining about our work and why we were doing it. One of these were from a man who has said "the computer is the game" but didn't understand why we had his great work under a microscope? At first there was fear in the comments, as if we were going to steal the secrets but then came the understanding that all good hackers understand. He had the gift for game coding and none of us could compete with that. We were happy to take ideas he built into code and rearange them. We could build complex levels that the game designers could never fully test. We were happy with that and it led to exploring other ideas that ended up in other games. When doom came out, it was clear that there was extra data in the files that the game wasn't using. I still wonder if that was there to help the people with the hex editors...
I'm not a hard code gamer and I would prefer to hack on some project over fraging some virtual bad guy however I do have a n64 and there were two games for it that were above the rest. The 1st was golden eye 007 and the other was perfect dark. These games are both from Rare but now that the N64 is dead, there will never be any more. I don't care so much about the levels progression or the story or the funky interlevel video but I would like more levels. Right now Rare claims their next release will perfect dark zero but it won't be out till 2004. I would buy a game cube today to play a new verson of that game but since there isn't a ginle other game for it, I think I'll pass. So far the PS2 seems to have the most games but most of them are centered around a game play I don't like (In a shooter game, I'll be happy waiting with the sniper rifle, I don't like timed things). I also don't like to see the character in 1st person shooter games. Its just something I've never been a fan of. The result is we have one company that made the 2 most popular games on the N64 and they have decided to shut down their company because they can't get their new tricks to work can can't teach a few creative people how to use their old level designer. They should have had at least 2 other games on the 007 engine and by now they could have kicked out 4 or 5 perfect dark levels. But they made other decisions. Funny that id decided to let other people play with their core and I wonder who is more likely to be here in 4 years, id or Rare.
A company in Lynchburg Va has a patent on this. Most likly they don't even know it but their patent on a one wire control system describes a computer sending (and recieving) morse code as well as sending out warnings via morse code. The guy who "invented" it said he didn't even understand what the patent application said and he already had about twenty patents. The patent was supposed to be for using a single wire control system in places where you can't drill holes to run wires but turns out to be a patent on morse code. They guy whos name is on the patent said there was piror art that he knew of involving mechanical devices so its not a major issue but like so many other ideas, in theory you can't sell this one without a license.
It allows stuff like:
$ph = [
{ apple => 1, pear => 2, kiwi => 3 },
'red',
'green',
'brown',
]; So you can then say print $ph->{apple}, "\n"; The ph->{apple} implyes a dereference to ph->[0] which is a hash so the {apple} pulls back and index which is then used in the array.
While this is cool for static data, its a real pain to delete records and add other elements. I'm guessing that uglyness is why its going away.
So why import a module to do something that you could do with an index?
If you do an strace on your version vs most of the other examples here, you will see why its wrong. 1) its much slower (1/3 as many file opens) 2) it uses much more memory 3) is only more readable if you know what the random module does.
Has anyone ever seen a patch for the current apache problem? What happens to thouse people that download all the new sources but they don't compile? How many of thouse people are still running open systems right now?
What we need is a the TeX engine hidden behind some nice gui and a well designed wrapper that can cope with large doument. I my wordprocessor to be able to open the NYC whitepages and not choke.
Add in the spell checker from The Documentors Workbench, and you'll have a great start.
I don't know about how your network is, but my networks don't have that problem.
I've got 3 cisco 2924xl switches all linked together. I run about 25 3com ethernet phones that all use raw ethernet packets (think datagram like udp). The phones are 10mb and many have PC's hooked to them (the phones are 10m hubs). Each of the phones sends a sequence packet number. So far in my testing, I have never seen a lost sequence number and this is for millions of packets.
Our other office is just a smaller version of the same thing with newer 2950 switches and only 4 phones. Accordig to the swtich, its at about 1/2,000,000 of its capacity most of the time when its busy.
Re:Why parse XML in the first place?
on
Perl & XML
·
· Score: 2
You don't even get into its real uglyness...
If you have to parse a bad xml file you will get into two states, one requires an infinite amount of memory, the other infinite amount of memory.
how do you get these broken xml files? Either a closing tag went missing or the program that created them has a bug or your program has a bug or...
Dr Knuth wrote about these problems because TeX suffers from them too. His solution is to bail out to the user and ask them to type stuff that will fix it. Anyone that has used TeX for a while knows that when they see that prompt, the only thing to do is let TeX do auto cleanup which means dropping quite a bit of its internal stack and trying to rebuild.
XML is one of a family of nested formats and they all have the problem when you have nest to any depth and most tags can be at any depth. The problem is your parser can't know when it sees something out of place because most tags can fit anywhere.
At work I deal with hundreds of compaines IT departments sendin me data that involves real money. Many of these people can't get a standard ascii file in the right format, how are they going to get XML done right? Our expierments show that it takes nearly two weeks of full time support per client for XML and about two hours for a plain ascii file.
I think the only place in the real world for XML is buzzword bingo.
Slashdot Mirror
3com makes an over priced "VoIP" system called the NBX 100. We got one of these for work and when we got a second office, we got another one. Its custom 486 pc like device that has all its devices hooked off a 10mb ethernet network. Its os is vxWorks. This seems to be a nice system for the geeky house if you can find one at a firesale. They have all the cool things like tapi so windows boxes and do stuff, they have pc soft phones. Of course they only support windows and won't desribe the packets that go over the wire (which aren't voip, but raw ethernet packets). I've got tcpdump and I'm slowly figuring out whats going on. The phones seem to be good but expensive and you want to keep them on their own port on a switch or at least away from links you want to be fast. For more details google for "nbx rant"
If the call manglers were so nice and stable, why did 5 of them hit my web server within days of code red? List price on a 25 station system at that time was somewhere in the range of US$40,000.
If you don't want all the fancy stuff, it does look like IOS will suport the voice cards on the smaller modems so a call manager isn't needed any more but it will take quite a long time to set up.
Is it science or just PR doubletalk? Assume that NASA finds some martin rat. What would happen when they anounce that to the world? The 1st thing that would happen is a large number of people inolved with the polically active religous right would be screaming because that didn't fit in with accepted values. Now what happens if you make a few bad science anouncements and have some one else counter them? Over time the religous nuts starts ignoring the blasphemy while others can get on with real science. The real world of science funing in the US demands appeasing many groups that don't want their tax money disproving their beliefs.
Did you notice that many of many of the people in that thread are still active on usenet?
From what one of my clients tells me, lots of them have credit cards numbers. Its just they belong to other people. Something like 90% of their fraud comes from Inida and they sell a $7 product that is easy to pirate and still 9 out of 10 chargebacks come from Inida.
Early theorys described gravity acting like a wind that would blow you towards the ground. It was later extended to include a wind from all directions blowing at the same time. Newtons gravity theorys were based on this concept and it was a problem that lead him to the idea of intergration. The integration of a pushing wind with the earth blocking it was much more difficult than the integration of just the earth sucking and the result was a bit of math seen in modern physics books.
The biggest problem with the gravity pushes theory was that things in space would slow down over time. Also as you speed up, you would need more energy to keep accelerating. Low orbit wouldn't be zero G, but zero differential G. Depending on how fast the gravity wind was and its strength, their would be no way to exceed its speed. The early attempts to quantify it thought there would be no way for the wind to go through the entire earth so the force you feel was considered its maxium which made it hard to explain higher gravity area like the sun and Saturn. There were a few other problems with the idea as well and it went away with the acceptance of the modern theory.
If you take a pendulum clock and put it in a elevator, will it speed up as you go up? As your moving it will. This is true for what we would consider mechancial clocks (there are some designs that would run slower in a rising elevator).
They use cessium and rubidium clocks. The time time dialation isn't quite as predicted but it is there. I find it odd that if you take a physical sping model and shrink it down real tiny, make a clock out of it, you get the same effect as time dilation.
The GPS system opened many new questions which is why they are building gravity probe B which should launch early next year. One of the major people behind GPB is Dr Parkinson who also was one of the major people involved with GPS.
Nice math to back up thouse ideas. In fact thouse ideas are the math. The problem is reality is playing a slightly different game. This is why The Voyagers and Pioneer spacecrraft are slowing down as well as all the GPS sats. There is also that slight problem with pendulums and eclipses. But other than thouse things, GR gravity models work great.
When the Daily Rotten ran this story last week or so, they had a link to the site and the site seemed to be a pr0n linkage site. It might have been illegal for other reasons.
Don't be so hard on the Savior on a Stick people after all they are just sheep looking for a shepherd.
They got the whole virgin birth savor thing from Egypt. Osiris even did the whole resurrection thing but its not clear if he pulled it off by the 3rd day. It might have taken him many more.
Remember that the Jews about 0BC had some very strange beliefs about blood and sick people so their society would have made an outcast of just about anyone that could be in the health profession. The dead sea scrolls talk about a few groups that spent time in Egypt learning things like cures and stuff and they might have come back with much different views about just how dangerous blood is. About the only place in the modern world at the time that had ritual involving eating the body of the god or drinking the god's blood were in Egypt. Eucharist anyone?
As far as the raping little boys goes, it was common in many parts of the world as it was spread via the Greeks during their expansion and it was part of acient greek culture at the time and the Romans seemd to think it was a good idea and spread it even more. Does anyone know why the bits of the Dead sea scrolls that talk about this subject haven't been released by the vatican?
Since the Book of the Dead can only be copied by the proper people according to the law of many Pharos and that had explicit times (kind of like the Disney (c) extentions), is the catholic church in violation of copyright law? Maybe Egypt could sue in the world court and get some of its stuff back.
how about a script that goes through the output of netstat every 5 minutes and adds entries to a table. If that table shows its "interesting" traffic, then nail it with something like ipfilter or just set it to a null route. In the case of a dedicated hosted serer, stick in another ethernet card and route all the funny trafic to it and let the switch or router set it to something slow. Its amazing what a perl script, a setuid wrapper for route and a 10mb ethernet card will do.
Late this year, a few of my net acquaintances will be meeting in two spots (S. Africa & S. Australia) for the pending doom and end of the world... oh wait... its just a total eclipse.
.01C. I can get non-moving distances to about .1mm, I can get weight to about .1g but I can get time to a few nanoseconds so I need to devise and expierment that uses just time. I've been thinking that I can get a disk spinning, I should use a simple optical coupler (like whats in your mouse) and a good timing circut to get some very precise timings. Now if I can build a disk that is well balanced but non-uniform density, that means its angular speed should be effected by the same force thats pushing a pendulum slighty to its side. The problem is the pendulum will contine to rotate as the force is applied but my spinning device will only see the force when the force is applied to one side of the disk. The smaller the disk, the shorter this time is since the shadow of the moon is travling at a rate of about 500m/s. The phenomenon I'm looking for will happen twice for about .0002 seconds. If I miss it this time there will be another 7 chances over the next decade.
There have been some examples where pendulums swing funny durring elipses. I want to see if I can recreate this and I'm looking for help to do it on the cheap. The current expirments show that a swinging uniform sphere will have some side forces on it. My problem is measuring things in the field. I can get temps to about
Years ago I was busy with a binary editor looking at wolf3d files. With my decoding and other peoples encoding the 1st level editors were done. Then other people saw our work and decided they could do better. A race was on to figure out all we could. It was interesting that at the time there were some very nasty notes from developers at id complaining about our work and why we were doing it. One of these were from a man who has said "the computer is the game" but didn't understand why we had his great work under a microscope? At first there was fear in the comments, as if we were going to steal the secrets but then came the understanding that all good hackers understand. He had the gift for game coding and none of us could compete with that. We were happy to take ideas he built into code and rearange them. We could build complex levels that the game designers could never fully test. We were happy with that and it led to exploring other ideas that ended up in other games. When doom came out, it was clear that there was extra data in the files that the game wasn't using. I still wonder if that was there to help the people with the hex editors...
I'm not a hard code gamer and I would prefer to hack on some project over fraging some virtual bad guy however I do have a n64 and there were two games for it that were above the rest. The 1st was golden eye 007 and the other was perfect dark. These games are both from Rare but now that the N64 is dead, there will never be any more. I don't care so much about the levels progression or the story or the funky interlevel video but I would like more levels. Right now Rare claims their next release will perfect dark zero but it won't be out till 2004. I would buy a game cube today to play a new verson of that game but since there isn't a ginle other game for it, I think I'll pass. So far the PS2 seems to have the most games but most of them are centered around a game play I don't like (In a shooter game, I'll be happy waiting with the sniper rifle, I don't like timed things). I also don't like to see the character in 1st person shooter games. Its just something I've never been a fan of. The result is we have one company that made the 2 most popular games on the N64 and they have decided to shut down their company because they can't get their new tricks to work can can't teach a few creative people how to use their old level designer. They should have had at least 2 other games on the 007 engine and by now they could have kicked out 4 or 5 perfect dark levels. But they made other decisions. Funny that id decided to let other people play with their core and I wonder who is more likely to be here in 4 years, id or Rare.
A company in Lynchburg Va has a patent on this. Most likly they don't even know it but their patent on a one wire control system describes a computer sending (and recieving) morse code as well as sending out warnings via morse code. The guy who "invented" it said he didn't even understand what the patent application said and he already had about twenty patents. The patent was supposed to be for using a single wire control system in places where you can't drill holes to run wires but turns out to be a patent on morse code. They guy whos name is on the patent said there was piror art that he knew of involving mechanical devices so its not a major issue but like so many other ideas, in theory you can't sell this one without a license.
Its right where it belongs...
http://httpd.apache.org/
I want the patch someplace where I can find it on www.apache.org. Thats what I want.
Has something replaced them?
They are one of thouse things that once you wrap your head around the low level concepts, you can see why it works.
[google cache] this explains it better
It allows stuff like:
$ph = [
{ apple => 1, pear => 2, kiwi => 3 },
'red',
'green',
'brown',
];
So you can then say
print $ph->{apple}, "\n";
The ph->{apple} implyes a dereference to ph->[0] which is a hash so the {apple} pulls back and index which is then used in the array.
While this is cool for static data, its a real pain to delete records and add other elements. I'm guessing that uglyness is why its going away.
So why import a module to do something that you could do with an index?
If you do an strace on your version vs most of the other examples here, you will see why its wrong.
1) its much slower (1/3 as many file opens)
2) it uses much more memory
3) is only more readable if you know what the random module does.
Only if they don't know the language. Its just a computer literacy issue. With perl, you have to know all of it to understand someone elses code.
Has anyone ever seen a patch for the current apache problem? What happens to thouse people that download all the new sources but they don't compile? How many of thouse people are still running open systems right now?
I send you this file in order to to jack your car.
What we need is a the TeX engine hidden behind some nice gui and a well designed wrapper that can cope with large doument. I my wordprocessor to be able to open the NYC whitepages and not choke.
Add in the spell checker from The Documentors Workbench, and you'll have a great start.
The smtp authentication problem is a mnagment issue. X.400 fixed that but it is unworkable on a large enviroment or even small ones.
I don't know about how your network is, but my networks don't have that problem.
I've got 3 cisco 2924xl switches all linked together. I run about 25 3com ethernet phones that all use raw ethernet packets (think datagram like udp). The phones are 10mb and many have PC's hooked to them (the phones are 10m hubs). Each of the phones sends a sequence packet number. So far in my testing, I have never seen a lost sequence number and this is for millions of packets.
Our other office is just a smaller version of the same thing with newer 2950 switches and only 4 phones. Accordig to the swtich, its at about 1/2,000,000 of its capacity most of the time when its busy.
You don't even get into its real uglyness...
If you have to parse a bad xml file you will get into two states, one requires an infinite amount of memory, the other infinite amount of memory.
how do you get these broken xml files? Either a closing tag went missing or the program that created them has a bug or your program has a bug or...
Dr Knuth wrote about these problems because TeX suffers from them too. His solution is to bail out to the user and ask them to type stuff that will fix it. Anyone that has used TeX for a while knows that when they see that prompt, the only thing to do is let TeX do auto cleanup which means dropping quite a bit of its internal stack and trying to rebuild.
XML is one of a family of nested formats and they all have the problem when you have nest to any depth and most tags can be at any depth. The problem is your parser can't know when it sees something out of place because most tags can fit anywhere.
At work I deal with hundreds of compaines IT departments sendin me data that involves real money. Many of these people can't get a standard ascii file in the right format, how are they going to get XML done right? Our expierments show that it takes nearly two weeks of full time support per client for XML and about two hours for a plain ascii file.
I think the only place in the real world for XML is buzzword bingo.