Not for a city the size of Philly but for cities of 200k people.
Find the highest point in a particular region of town, and get the rights to put a weatherproof box and an antenna up on a tower near there. (cell phone companies are very good at finding the best points to place a tower or antenna. you should follow their lead.) in the weatherproof box put a soekris board running linux and two wireless cards and antennas on them. One card will be a backbone 802.11g link with a directional, high gain antenna, the other a customer link with a 802.11b omni antenna.
do that for every region that needs coverage.
Find points where multiple region APs can see, and do the same as above, but get a horizontally polarized omnidirectional antenna. they're expensive, but worth it. Connect all the regional APs to this. Run a T1 into whatever computer controls this antenna.
do that for every group of regions.
viola! citywide wirless. a true star topology.
there are some details i'm leaving out, but this should give you a good idea.
run zebra on the linux APs to handle routing. use backbone redundancy where possible, the APs will fail occaisionally.
If you have any SQL skills, and Perl or PHP, you could probably write your own in fairly short order.
at one of my previous employers, the new entry-level support guy wrote something just like this, just to teach himself Perl & SQL. His also included meeting room booking, and vacation autoresponders. It was his first foray into programming anything, and he did it in about two weeks.
... trying to make radio not transmittable is like trying to make water not wet. (ripped off from jwz i think, and transformed to fit your question)
the only way to actually attempt to control who transmits on what bandwidth would probably require some sort of licensing from the FCC. that way you have some sort of legal recourse if someone does decide to walk on your airwaves.
there are lots of techies out there who know how to build transmitters and recievers that can send and recieve at any frequency they want, so trying to put a technical barrier to the actual airwaves won't get you anywhere, as you mentioned.
an elegant solution would consist of some sort of stream verification, so that you can verify the sender of a signal via fingerprint, encryption, hidden messages, etc. Something that you control and that is difficult to reverse engineer would allow you to differentiate your signals from someone else's.
I think XM and Sirius encrypt their streams, or at least apply some sort of proprietary DRM to their streams to keep idle listeners from tuning in. They also use a fully digital stream, so encryption is pretty easy. And if I remember, they use an odd frequency that must be licensed from the FCC to use. The combination of those things seems to work great for them, a quick search on satellite radio hacking revealed almost nothing useful.
I've never used PostgreSQL so I can't and won't say anything about it other than this: Make sure Postgres does everything you need and can perform similarly to Oracle in your environment.
We momentarily thought about dropping Oracle for PGSQL at my last company, but after we hired a consultant to do everything he could with Postgres to improve performance, Oracle was still a clear winner for us.
I don't know if he was incompetent or what, but the performance numbers weren't even close with what we needed it to do.
If your database will run just as well on PostgreSQL, I say go for it. If you go with PostgreSQL and it doesn't perform as well as Oracle in your environment, your management will have serious doubts about open-source software from then on, and that's a stain that is hard to get rid of.
in short: choose based on your needs, not based on the fact that one is open and the other isn't.
Yup. If I remember, forking XFree86 into X.org was the best thing that couuld have happened to X development. All recent distros worth mentioning now use X.org instead of XFree86.
Forking isn't necessarily bad. Besides, everywhere I've ever worked uses a fork of unix.. Solaris, FreeBSD, HP-UX, AIX, all derive their origins from original UNIX forks.
distributing GPL software is not against the GPL... if it were the GPL would have died long ago.
its not a GPL issue, its a software patent issue. even if your code is GPL, if what your software does is covered by someone else's patent, you're in patent violation. if you distribute patent-infringing software, you make yourself liable.
that is why redhat won't include mp3 support with their distros. GOSH!
if he's not going to take the drive anywhere, just backup nightly, I believe there are PCMCIA -> IDE adapters that can do the job.
I know you mentioned INTERNAL drives but you'll likely pay through the nose for a drive like that.. try and find an adapter to the PCMCIA bridge and you'll have better success i think.
is that why i can build an AM radio from peices i find around the house, but can't build an FM radio that can tune the downtown station without buying parts made just for that purpose?
From the article: 'Should the people who make and sell "violent video" games be held accountable if someone commits a crime because of playing them?'
k for the last time - no one commits a crime because of playing a video game. no one. not anywhere, ever, under any circumstances. if you commit a crime after playing a video game, you were going to commit a crime anyway. i've played a LOT of very, very violent video games and never once have i ever even considered reproducing the game in real life. if you do, you have issues beyond any video game or television program...
its basic psychology. you are either inclined to commit crime or you're not, and if you are, its usually because you were psychologically damaged as a child.
lets do something about parents who abuse their kids and raise murderers instead of trying to create a law that criminalizes a harmless video game.
I remember very clearly having a job interview in 1997 and being asked if I had 5 years of Java experience. My reply was something like "but java wasn't released until last year.." interviewer said "so that's a no, right?"
you're right. as much as slashdot thinks it is, it is not a news site. i don't think a single person that writes stories for this site has even taken journalism 101.
there is so much bias and prejudgement in the words of many of these authors that it almost gives me heartburn to read some of these stories. what's worse, is when an author mentions something bad, and the whole freaking discussion lights up very much Jihaad style.
Go read Suck.com's old parody of Slashdot and see just what's changed in almost 5 and a half years. Nothing. Same stories day in and day out, same design, same judgemental attitude.
This is not a news site. Don't expect it to reflect actual journalistic principles.
Slashdot Mirror
Not for a city the size of Philly but for cities of 200k people.
Find the highest point in a particular region of town, and get the rights to put a weatherproof box and an antenna up on a tower near there. (cell phone companies are very good at finding the best points to place a tower or antenna. you should follow their lead.) in the weatherproof box put a soekris board running linux and two wireless cards and antennas on them. One card will be a backbone 802.11g link with a directional, high gain antenna, the other a customer link with a 802.11b omni antenna.
do that for every region that needs coverage.
Find points where multiple region APs can see, and do the same as above, but get a horizontally polarized omnidirectional antenna. they're expensive, but worth it. Connect all the regional APs to this. Run a T1 into whatever computer controls this antenna.
do that for every group of regions.
viola! citywide wirless. a true star topology.
there are some details i'm leaving out, but this should give you a good idea.
run zebra on the linux APs to handle routing.
use backbone redundancy where possible, the APs will fail occaisionally.
well good for you for pointing that out. here's a cookie.
now, if you understood english, you'd understand that he wrote an HR system that did all this stuff additionally.
give me that cookie back.
If you have any SQL skills, and Perl or PHP, you could probably write your own in fairly short order.
at one of my previous employers, the new entry-level support guy wrote something just like this, just to teach himself Perl & SQL. His also included meeting room booking, and vacation autoresponders. It was his first foray into programming anything, and he did it in about two weeks.
Can't be that hard.
I'm tired of this question. original -> lossless -> whatever always wins.
okay i've totally freaking had it with the april fools jokes. not a single one of them are funny, and not a single one could be defined as a joke.
what is it with nerds and the desire to look like a moron to anyone who can see right through these things... because we can... easily.
these aren't funny. you're not fooling anyone. you look like morons now because there is NO WAY that this could even considered "journalism".
mod me down, fuck me in the ass, whatever you wanna do, just knock the april fools shit off.
... trying to make radio not transmittable is like trying to make water not wet. (ripped off from jwz i think, and transformed to fit your question)
the only way to actually attempt to control who transmits on what bandwidth would probably require some sort of licensing from the FCC. that way you have some sort of legal recourse if someone does decide to walk on your airwaves.
there are lots of techies out there who know how to build transmitters and recievers that can send and recieve at any frequency they want, so trying to put a technical barrier to the actual airwaves won't get you anywhere, as you mentioned.
an elegant solution would consist of some sort of stream verification, so that you can verify the sender of a signal via fingerprint, encryption, hidden messages, etc. Something that you control and that is difficult to reverse engineer would allow you to differentiate your signals from someone else's.
I think XM and Sirius encrypt their streams, or at least apply some sort of proprietary DRM to their streams to keep idle listeners from tuning in. They also use a fully digital stream, so encryption is pretty easy. And if I remember, they use an odd frequency that must be licensed from the FCC to use. The combination of those things seems to work great for them, a quick search on satellite radio hacking revealed almost nothing useful.
So I take it that X over SSH won't work? Seems to me that that's the obvious choice (its what I'd do).
Are you looking for something besides that?
whoops, make that 27 square miles. bad decimal.
i highly doubt that its a 27 square mile expo.
.. like wow. especially since a city block is 1/10th of a mile on each side. that's 100 city blocks to a square mile, so 2.7 square miles?
2.7 square miles? 2.7 square miles. i literally don't believe that.
.. which is why i've always wondered why they weren't used in medicine.
oh yeah, now i remember, they're freaking disgusting! that's why! BARF
I've never used PostgreSQL so I can't and won't say anything about it other than this: Make sure Postgres does everything you need and can perform similarly to Oracle in your environment.
We momentarily thought about dropping Oracle for PGSQL at my last company, but after we hired a consultant to do everything he could with Postgres to improve performance, Oracle was still a clear winner for us.
I don't know if he was incompetent or what, but the performance numbers weren't even close with what we needed it to do.
If your database will run just as well on PostgreSQL, I say go for it. If you go with PostgreSQL and it doesn't perform as well as Oracle in your environment, your management will have serious doubts about open-source software from then on, and that's a stain that is hard to get rid of.
in short: choose based on your needs, not based on the fact that one is open and the other isn't.
the whole purpose of this sensor is to protect the hard drive, so i'd say the answer is something close to "none."
dumbasses that sign documents without a lawyer deserve what they get, imho. me included.
Uhh, he never said a thing about blocking the page, just displaying a message. God.
if i had a high traffic website i would probably do my part and tell IE users to stop and smell the roses too. God.
Yup. If I remember, forking XFree86 into X.org was the best thing that couuld have happened to X development. All recent distros worth mentioning now use X.org instead of XFree86.
Forking isn't necessarily bad. Besides, everywhere I've ever worked uses a fork of unix.. Solaris, FreeBSD, HP-UX, AIX, all derive their origins from original UNIX forks.
distributing GPL software is not against the GPL... if it were the GPL would have died long ago.
its not a GPL issue, its a software patent issue. even if your code is GPL, if what your software does is covered by someone else's patent, you're in patent violation. if you distribute patent-infringing software, you make yourself liable.
that is why redhat won't include mp3 support with their distros. GOSH!
if he's not going to take the drive anywhere, just backup nightly, I believe there are PCMCIA -> IDE adapters that can do the job.
I know you mentioned INTERNAL drives but you'll likely pay through the nose for a drive like that.. try and find an adapter to the PCMCIA bridge and you'll have better success i think.
who do we like again? we like comic books and we like mmorpgs... so who is supposed to win this?
thanks i have a headache now.
is that why i can build an AM radio from peices i find around the house, but can't build an FM radio that can tune the downtown station without buying parts made just for that purpose?
FM is harder to implement in my experience.
yeah its sad. they should have greeted him with a port-a-potty on the runway.
i'm serious.
From the article: 'Should the people who make and sell "violent video" games be held accountable if someone commits a crime because of playing them?'
k for the last time - no one commits a crime because of playing a video game. no one. not anywhere, ever, under any circumstances. if you commit a crime after playing a video game, you were going to commit a crime anyway. i've played a LOT of very, very violent video games and never once have i ever even considered reproducing the game in real life. if you do, you have issues beyond any video game or television program...
its basic psychology. you are either inclined to commit crime or you're not, and if you are, its usually because you were psychologically damaged as a child.
lets do something about parents who abuse their kids and raise murderers instead of trying to create a law that criminalizes a harmless video game.
since when do you have to view images on the web in a graphical browser?
this images does not predate image viewers.
I remember very clearly having a job interview in 1997 and being asked if I had 5 years of Java experience. My reply was something like "but java wasn't released until last year.." interviewer said "so that's a no, right?"
*sigh*
If you're talking about the very first N64 emulator, then you're wrong.
you're right. as much as slashdot thinks it is, it is not a news site. i don't think a single person that writes stories for this site has even taken journalism 101.
there is so much bias and prejudgement in the words of many of these authors that it almost gives me heartburn to read some of these stories. what's worse, is when an author mentions something bad, and the whole freaking discussion lights up very much Jihaad style.
Go read Suck.com's old parody of Slashdot and see just what's changed in almost 5 and a half years. Nothing. Same stories day in and day out, same design, same judgemental attitude.
This is not a news site. Don't expect it to reflect actual journalistic principles.