Hm, if you traveled away from something at near the speed of light..isnt the speed of light a constant so the clock speed wouldnt change, all you would get is a general blue colour shifting of the light?
I didnlt realize it was so bad, but yes something I have definatly considered is multiple access points around town. (On buildings or mountains, so you'd still use the dish) They would also have to link with their own antennas so this begins to become a complicated problem.
Honestly networking and WiFi arent my strong suit. Me and a friend are working on this, I'm more the electrical engineer and hes the software/networking guru.
But yes, I've seen large scale wifi and an acesss point every 20 feet (some have thousands and thousands of them) seems like a wasteful brute force way to do things. Imagine if the cellular network operated like that. Bleugh. I cant even imagine the routing nightmare.
But yeah, thanks for your input..things are just getting off the ground now, various companies have sent me access points to test/etc.
Yeah, no where near line of sight. But in both cases we will have, in the case of 2.4ghz an access point on the hill, and in the case of laser, a laser repeater of my own design.
I've already dont simulation in software (radiomobile predicts a 20 over S9 signal, so it will probably be a bit less depending on weather) for 2.4ghz and considering I've got a 30dB dish to play with, I VERY much doubt I'll have a problem.
For laser, sofar i'll be doing straight digital on/off (so only low speeds will be possible at first) but then there are ways to skew the wavelength output of certain lasers and ill be trying FM at 10mbps. The laser repeater will take in the signal, process it (if neccesary with a DSP) and then retransmit using another diode.
I have done simple sight tests with a 2$ laser pointer and the thing is easily visible with a cheap monocular. All I should need to do is use a cheap filter on a phototransistor amplifier to filter out background light and light changes (night and day).
There are definatly technical challenges, but I think I can surmount them. One day I'll make a website and post it on slashdot..maybe it will become my first ever accepted story post haha.
It seems it was amplified. I dont see unamplified on their site, and in the project materials it lists bidirectional signal amplifiers (1.5 watt).
Not to say this isnt still amazing. I'm setting up some long distance point to point WiFi myself, albiet with a bigger dish on one side for testing. Not 82 miles, but im doing it for practical reasons.
Primestar dishes seem to have a gain of around 20dB at 2.4ghz if you have a decent feedhorn. (20dB is a gain of around 100). I'll be using at least one old c-band dish. It should have a gain of 30dB or more. (thats a gain of around 1000)
My eventual plan is to set up a site on a mountain with a fairly high gain omnidirectional antenna, and then anyone who wants to connect to the LAN just points at it with a primestar dish. If i can find sponsors I will even make it 802.11G and connect it to the internet.
This way anyone can have wifi access, at least from home, and I wont need to blanket the town in access points, interfere with cordless phones/other networks, etc because without the high gain of the primestar dish you shouldnt even be able to see the network. Should be fun.
If you have a some high land nearby...or a small tower, you could set something up with a friend to use some of his/her bandwidth via a laser or WiFi connection. I'm setting up a 2 person laser lan with a friend of mine, and hes 20 km away. I've got to bounce it back across one hill because i dont have line of sight. 10mbps. It's doable.
You also dont usually have to be too far from town to get a nice country home. I rent a place on 2 acres of green grassy land, 3 gardens, etc, for 950 a month. Of course I'm in canada, and there is probly a lot more nice available real-estate up here, but still, I live like 30 seconds drive from town, and 10 minutes from down-town kelowna.
Correct me if im wrong, but its not illegal or anything to not even get a SSN ? What happens in this case? I didnt get mine untill i was like 18. Since its legal to not own it, shouldnt it be not legal for people to force you to give it ?
I really am asking here,not offering a point..i want input:)
How can you not afford a cd burner. They are like 30 dollars for a cheapish one. You can buy them with the change you find between the couch in enough time. And there are free cd burning progams..like cdrecord as an anonymous coward pointed out. I think nero even has a trial version (dont hold me to that).
And lets face it, those that dont pirate are few and far between. I'm sure the nero corp wouldnt hold you in too much contempt if you kazaa'd it, burnt the cd and then uninstalled it.
If nano assemblers were common, money would no longer be even an issue. Copy a ferarri? who cares!
The would would have the potential to become an instant utopia. Food could be made from anything, as long as the right atoms were available. A model could be made of anything. The prototyping costs for any idea you have could be zero. Technology would flourish. Starvation would dissapear. Probably some kind of population control would need to be put into effect, but ah well haha.
No one would ever want for anything. Anything you could think of and maybe..draw in a 3d modelling program like solidworks or something, you could have, right away. It doesnt work right? make changes and watch it happen.
Also,recycling would be 100% efficient, raw materials would almost never run out. When something gets old, throw it back into the heap of raw materials.
You want a ferarri? fine..you wanna modify the engine to have 1000 HP? Also fine. Anything you want is at your finger tips..just wanting 'a cool car' is kind of small scale thinking.
Re:speed is not a concern
on
DVD-Rs go 8x
·
· Score: 1
You are kinda right, but also wrong..
Most drives 32x or lower are CLV..but ZONE CLV. They burn at a constant slowish rate at the start, then ramp up the speed, then burn at that rate constantly for a bit..then ramp up again..etc. The burn graph looks like a stairstep pattern with 3-4 steps.
Most new drives seem to tend towards CAV or P-CAV (partial cav.) Partial CAV keeps the disc spinning at the same rate throughout most of the burn, untill it reaches some maximum burn speed, then burns at a constant speed untill the end of the cd.
A few are just plain CAV which ramps up their burn speed (keeping the cd spinning at the same rate) untill the cd is completely burnt.
I dont know which method dvd writers use, havent been able to take much of a look since i havent yet seriously considered buying them, but that should help a bit with how the various burner tech's work.
Some friends of mine used to use mp3.com as one of their main ways to get their music out to people. And it works. They were soon the #1 'metal' band on the site, and people in the USA had heard of them from all over the place. It was really amazing to see their growth due in large part to people finding them on mp3.com. I even mentioned their name once to my sister and she had heard of them two provinces away.
After plenty of downloads and some dedicated touring, they were recently signed to maverik records.
So you cant say that sites like mp3.com doesnt help get the music out there, or isnt good for fledgling artists.
Oops, their band name is stutterfly if someone wanted to know. Here is the mp3.com link.
What I would like to see is tropical/salt water fish engineered to live in fresh water tanks. Salt water tanks are fricken hard to take care of. Hard and expensive to start. Salt water fish can be very nice to have, and are generally MUCH more colourfull than fresh water fish.
The pictures of these fish..kind of neet I guess, but it really still looks like a boring fish.
If you could get fish like this in a easy to maintain fresh-water tank, it would be a great jump for joe-shmoes like me wanting to have a nice fish tank without the hassle of trying get a salt-water tank going.
There must be a lot of texans because I dont live there, and have never lived there, and just as you said, its VERY not funny. It just seems like some show, always trying to teach some moral at the end. I have watched a good few episodes because it just happens here that there is one 1/2 hour period between shows i like in which king of the hill is the only thing on. I have seen maybe 20 eps and have never so much as chuckled during any period of it. So enough texans must be around to keep it in fox's primetime lineup, because I dont see how else it would be there.
It's too bad no one saw fit to reply to this, because this is a question i'd also like an answer to. It IS a nuclear power source in a pacemaker, and its small. I wonder whats stopping companies from using it in larger devices. Probly the amazingly prohibitive cost, but oh well.
Small too, the 50 farad ones are only 1.8cm diameter, and 4cm long. Course charging it at 2.5 volts still only gives you just over 300 joules. And the cap IS 25 canadian..but still, good stuff.
You are saying that the country ratings mean nothing because..let me get this straight.. Since there are fewer competitors from europe..the ones that compete are better..but since more people from the USA compete, they are more amateurs?
I propose that they ARE essentially randomly selected. Whoever wants to compete, competes. All the competitors averaged out from a country is a country ranking. Since its an average, obviously the country rankings mean just what they show. The average ranking of that country compared to other countries.
Buuuut, if it makes you feel better, have fun rationalizing.
(BTW, im from canada which is only a spot above the usa, but you dont see me justifying it wiht BS stats examples)
Er, it must be nice to be able to dismiss it like that, but as was previously mentioned: If you look at topcoders country ratings, usa is near the bottom of the ranked countries. Just under canada there. The top countries are Sweeden, Poland, and Germany, in that order. The link to that page is in the comment above yours, take a look.
If it were the olympics you wouldn't say 'ahh, there are so many countries, USA is bound to lose most of the time.' Thats downright unpatriotic of you:)
Hi, this is the US Postal service. It looks like we've discovered a package lost in the mail 23 years ago, deliverable to you. It just seems to be marked 'Sense of Humor' from 'God'. Thats odd. Well, here you go.
Er, maybe you havent been paying attention, but ATI has -just- done the exact same thing wiht their XT line. The cards are identical in both cases except with very minor clock speed increases. I dont see either company going out of business any time soon.
In fact, this is what nvidia has done since it started, and it doesnt seem to be doing toooo badly;)
IE: TNT..TNT2, TNT2 Ultra.. Then Geforce, Geforce DDR..Geforce 2 (not just a clock speed increase, but offered little for new features)...Geforce 2 Ultra.. then Geforce 3, Geforce 3 TI series....etc etc
Its just how the business works and doesnt seem to be hurting nvidia financially.
For me, it could be a good thing, because it will drive the prices lower for the 'older' cards, making them more affordable for pretty much the exact same performance. Certainly not an increase that couldn't be gained from a minor overclock.
I dont understand his 'world champion record'. He has a video on his site of him solving the cube in less than the 20 seconds which, according to/., is his record. The woman who's method he uses has videos on her site where she solvs the cube in around 14 seconds, 16 seconds, etc. Can anyone enlighten me?
Use 10% of your CD space for PAR2 files. Then as long as you have semi-intact files and enought 'blocks' in your PAR2 files to repair them, its like having RAID 5 on a cd. What you could also do is for every 3-5 cds you burn, burn a cd that contains JUST redundancy data, a-la PAR2. This is like raid 3 on cd.
It depends on howmuch you care about your data, but this way, you could lose any one of those 3-5 cds and replace all the data, good as new.
Here is the PAR2 Spec for the many software nerds out there.
You dont need to test it out, because its true. If you scratch the label the cd is toast. All the cd's data is stored on the underside of that shiny label on top of the cd. The rest is just plastic.
IF you place it plastic-down you can, like he said, buff out scratches. A good few companies sell devices you can run your cds through to sand out scratches on the plastic side.
Slashdot Mirror
Hm, if you traveled away from something at near the speed of light..isnt the speed of light a constant so the clock speed wouldnt change, all you would get is a general blue colour shifting of the light?
I didnlt realize it was so bad, but yes something I have definatly considered is multiple access points around town. (On buildings or mountains, so you'd still use the dish) They would also have to link with their own antennas so this begins to become a complicated problem.
Honestly networking and WiFi arent my strong suit. Me and a friend are working on this, I'm more the electrical engineer and hes the software/networking guru.
But yes, I've seen large scale wifi and an acesss point every 20 feet (some have thousands and thousands of them) seems like a wasteful brute force way to do things. Imagine if the cellular network operated like that. Bleugh. I cant even imagine the routing nightmare.
But yeah, thanks for your input..things are just getting off the ground now, various companies have sent me access points to test/etc.
Yeah, no where near line of sight. But in both cases we will have, in the case of 2.4ghz an access point on the hill, and in the case of laser, a laser repeater of my own design.
I've already dont simulation in software (radiomobile predicts a 20 over S9 signal, so it will probably be a bit less depending on weather) for 2.4ghz and considering I've got a 30dB dish to play with, I VERY much doubt I'll have a problem.
For laser, sofar i'll be doing straight digital on/off (so only low speeds will be possible at first) but then there are ways to skew the wavelength output of certain lasers and ill be trying FM at 10mbps. The laser repeater will take in the signal, process it (if neccesary with a DSP) and then retransmit using another diode.
I have done simple sight tests with a 2$ laser pointer and the thing is easily visible with a cheap monocular. All I should need to do is use a cheap filter on a phototransistor amplifier to filter out background light and light changes (night and day).
There are definatly technical challenges, but I think I can surmount them. One day I'll make a website and post it on slashdot..maybe it will become my first ever accepted story post haha.
-Jay VE7JID (oh no my secret identity!)
It seems it was amplified. I dont see unamplified on their site, and in the project materials it lists bidirectional signal amplifiers (1.5 watt).
Not to say this isnt still amazing. I'm setting up some long distance point to point WiFi myself, albiet with a bigger dish on one side for testing. Not 82 miles, but im doing it for practical reasons.
Primestar dishes seem to have a gain of around 20dB at 2.4ghz if you have a decent feedhorn. (20dB is a gain of around 100). I'll be using at least one old c-band dish. It should have a gain of 30dB or more. (thats a gain of around 1000)
My eventual plan is to set up a site on a mountain with a fairly high gain omnidirectional antenna, and then anyone who wants to connect to the LAN just points at it with a primestar dish. If i can find sponsors I will even make it 802.11G and connect it to the internet.
This way anyone can have wifi access, at least from home, and I wont need to blanket the town in access points, interfere with cordless phones/other networks, etc because without the high gain of the primestar dish you shouldnt even be able to see the network. Should be fun.
If you have a some high land nearby...or a small tower, you could set something up with a friend to use some of his/her bandwidth via a laser or WiFi connection. I'm setting up a 2 person laser lan with a friend of mine, and hes 20 km away. I've got to bounce it back across one hill because i dont have line of sight. 10mbps. It's doable.
You also dont usually have to be too far from town to get a nice country home. I rent a place on 2 acres of green grassy land, 3 gardens, etc, for 950 a month. Of course I'm in canada, and there is probly a lot more nice available real-estate up here, but still, I live like 30 seconds drive from town, and 10 minutes from down-town kelowna.
Correct me if im wrong, but its not illegal or anything to not even get a SSN ? What happens in this case? I didnt get mine untill i was like 18. Since its legal to not own it, shouldnt it be not legal for people to force you to give it ?
:)
I really am asking here,not offering a point..i want input
Ohhh yeah, Paypal is REAL safe
How can you not afford a cd burner. They are like 30 dollars for a cheapish one. You can buy them with the change you find between the couch in enough time. And there are free cd burning progams..like cdrecord as an anonymous coward pointed out. I think nero even has a trial version (dont hold me to that).
And lets face it, those that dont pirate are few and far between. I'm sure the nero corp wouldnt hold you in too much contempt if you kazaa'd it, burnt the cd and then uninstalled it.
Ah well, good luck
Talk about thinking small-scale.
If nano assemblers were common, money would no longer be even an issue. Copy a ferarri? who cares!
The would would have the potential to become an instant utopia. Food could be made from anything, as long as the right atoms were available. A model could be made of anything. The prototyping costs for any idea you have could be zero. Technology would flourish. Starvation would dissapear. Probably some kind of population control would need to be put into effect, but ah well haha.
No one would ever want for anything. Anything you could think of and maybe..draw in a 3d modelling program like solidworks or something, you could have, right away. It doesnt work right? make changes and watch it happen.
Also,recycling would be 100% efficient, raw materials would almost never run out. When something gets old, throw it back into the heap of raw materials.
You want a ferarri? fine..you wanna modify the engine to have 1000 HP? Also fine. Anything you want is at your finger tips..just wanting 'a cool car' is kind of small scale thinking.
You are kinda right, but also wrong..
Most drives 32x or lower are CLV..but ZONE CLV.
They burn at a constant slowish rate at the start, then ramp up the speed, then burn at that rate constantly for a bit..then ramp up again..etc. The burn graph looks like a stairstep pattern with 3-4 steps.
Most new drives seem to tend towards CAV or P-CAV (partial cav.) Partial CAV keeps the disc spinning at the same rate throughout most of the burn, untill it reaches some maximum burn speed, then burns at a constant speed untill the end of the cd.
A few are just plain CAV which ramps up their burn speed (keeping the cd spinning at the same rate) untill the cd is completely burnt.
I dont know which method dvd writers use, havent been able to take much of a look since i havent yet seriously considered buying them, but that should help a bit with how the various burner tech's work.
Some friends of mine used to use mp3.com as one of their main ways to get their music out to people. And it works. They were soon the #1 'metal' band on the site, and people in the USA had heard of them from all over the place. It was really amazing to see their growth due in large part to people finding them on mp3.com. I even mentioned their name once to my sister and she had heard of them two provinces away.
After plenty of downloads and some dedicated touring, they were recently signed to maverik records.
So you cant say that sites like mp3.com doesnt help get the music out there, or isnt good for fledgling artists.
Oops, their band name is stutterfly if someone wanted to know.
Here is the mp3.com link.
and remember they were only caught because of this bragging. Stupidly mentioning previous crimes which the police had liften prints from.
What I would like to see is tropical/salt water fish engineered to live in fresh water tanks. Salt water tanks are fricken hard to take care of. Hard and expensive to start. Salt water fish can be very nice to have, and are generally MUCH more colourfull than fresh water fish.
:)
The pictures of these fish..kind of neet I guess, but it really still looks like a boring fish.
Google images gives you the general idea.
If you could get fish like this in a easy to maintain fresh-water tank, it would be a great jump for joe-shmoes like me wanting to have a nice fish tank without the hassle of trying get a salt-water tank going.
HEAR THAT genetic engineers! do it!
Of course none of the Enron execs were hit..all the people who would want to have them killed are now flat broke. :)
There must be a lot of texans because I dont live there, and have never lived there, and just as you said, its VERY not funny. It just seems like some show, always trying to teach some moral at the end.
I have watched a good few episodes because it just happens here that there is one 1/2 hour period between shows i like in which king of the hill is the only thing on. I have seen maybe 20 eps and have never so much as chuckled during any period of it.
So enough texans must be around to keep it in fox's primetime lineup, because I dont see how else it would be there.
It's too bad no one saw fit to reply to this, because this is a question i'd also like an answer to. It IS a nuclear power source in a pacemaker, and its small. I wonder whats stopping companies from using it in larger devices. Probly the amazingly prohibitive cost, but oh well.
broken link
Here is a link to the PDF
Caps up to 50 farads at 2.5 volts..
Small too, the 50 farad ones are only 1.8cm diameter, and 4cm long. Course charging it at 2.5 volts still only gives you just over 300 joules. And the cap IS 25 canadian..but still, good stuff.
Uhh, what you're saying makes absolutly no sense.
..let me get this straight.. Since there are fewer competitors from europe..the ones that compete are better..but since more people from the USA compete, they are more amateurs?
You are saying that the country ratings mean nothing because
I propose that they ARE essentially randomly selected. Whoever wants to compete, competes. All the competitors averaged out from a country is a country ranking. Since its an average, obviously the country rankings mean just what they show. The average ranking of that country compared to other countries.
Buuuut, if it makes you feel better, have fun rationalizing.
(BTW, im from canada which is only a spot above the usa, but you dont see me justifying it wiht BS stats examples)
Er, it must be nice to be able to dismiss it like that, but as was previously mentioned: If you look at topcoders country ratings, usa is near the bottom of the ranked countries. Just under canada there. The top countries are Sweeden, Poland, and Germany, in that order. The link to that page is in the comment above yours, take a look.
:)
If it were the olympics you wouldn't say 'ahh, there are so many countries, USA is bound to lose most of the time.' Thats downright unpatriotic of you
Hi, this is the US Postal service. It looks like we've discovered a package lost in the mail 23 years ago, deliverable to you. It just seems to be marked 'Sense of Humor' from 'God'. Thats odd. Well, here you go.
Er, maybe you havent been paying attention, but ATI has -just- done the exact same thing wiht their XT line.
;)
The cards are identical in both cases except with very minor clock speed increases.
I dont see either company going out of business any time soon.
In fact, this is what nvidia has done since it started, and it doesnt seem to be doing toooo badly
IE:
TNT..TNT2, TNT2 Ultra..
Then Geforce, Geforce DDR..Geforce 2 (not just a clock speed increase, but offered little for new features)...Geforce 2 Ultra..
then Geforce 3, Geforce 3 TI series....etc etc
Its just how the business works and doesnt seem to be hurting nvidia financially.
For me, it could be a good thing, because it will drive the prices lower for the 'older' cards, making them more affordable for pretty much the exact same performance. Certainly not an increase that couldn't be gained from a minor overclock.
I dont understand his 'world champion record'. /., is his record.
He has a video on his site of him solving the cube in less than the 20 seconds which, according to
The woman who's method he uses has videos on her site where she solvs the cube in around 14 seconds, 16 seconds, etc.
Can anyone enlighten me?
Use 10% of your CD space for PAR2 files. Then as long as you have semi-intact files and enought 'blocks' in your PAR2 files to repair them, its like having RAID 5 on a cd. What you could also do is for every 3-5 cds you burn, burn a cd that contains JUST redundancy data, a-la PAR2. This is like raid 3 on cd.
It depends on howmuch you care about your data, but this way, you could lose any one of those 3-5 cds and replace all the data, good as new.
Here is the PAR2 Spec for the many software nerds out there.
And here is Quickpar, a good PAR2 makeing tool.
You dont need to test it out, because its true. If you scratch the label the cd is toast. All the cd's data is stored on the underside of that shiny label on top of the cd. The rest is just plastic.
IF you place it plastic-down you can, like he said, buff out scratches. A good few companies sell devices you can run your cds through to sand out scratches on the plastic side.
Those who cant teach, teach gym.