Hmmmm.. a 'ham' making new antenna discoveries...sounds familiar:-)
It is not physically possible to attain a moderate Q or low Q, thin monopole --antenna-- which is 15-18 inches on 21 MHz and is efficient. This is not a statement against K1DFT, or anyone else. It is a statement of fact, based on the physics of very electrically small antennas, and many years professionally devoted to pursuing such issues. K1DFT has apparently pursued a path long since traveled by many others, and not only myself.
Occasionally, in some form factors, it is possible to trade efficiency for gain, but this is too short for that. And so much for bandwidth.
Great care needs to be taken to remove multipath effects in the measurement of gain, and greater care needs to be taken in equating measured comparitive gain with actual antenna efficiency. Based on this anecdotal report, there is no evidence presented that such issues could be removed in the measurements.
Radiation resistance results from an antenna's sampling portions of radiating waves. A short antenna samples a small portion of the wave--and not from the peak, unless the electrical length is 1/4 to 1/2 the wave or more. Multiple current maxima do help increase radiation resistance. Efficiency is derived from the ratio of this radiation resistance to the total resistance--which includes ohmic losses. Distributed discrete loads are moderately lossy, and one would require load Q-factors of 1000 or more to attain even moderate Q antennas with high efficiency.
The optimization of distributed loads in monopoles is an old technology, recently aided via genetic algorithms. I recall, for example, some good work on this approach published in 1996 by Boas et al. Before that, R.C. Hansen made fundamental efforts into such understanding, as well as others. MATLAB is also a poor tool for this, because it is difficult to assess losses properly.
Another concern is: what is radiating? In some cases, ground planes (counterpoises) do, indeed, radiate in the far field and are thus part of the antenna. The monopole 'antenna' is often a loading mechanism in this case, and contributes little to the radiation. There are commercially used 'antennas' that are 1/10 th the height of a 1/4 wave or less; are broad/multiband/ and so on. This is not new. They are used in wireless LAN; RFID; and cell phones; and many other places.
Many here are aware of my efforts in fractal antenna technology--which started in a similar radio amateur vein. Although I applaude continued efforts into antenna experimentation through ham radio, I must confess that my educated opinion is that nothing new has, or will be, attained by such efforts. The state of the art is often not public, and far outstrips what is commonly available in, for example, amateur radio publications. I would enjoy being wrong, however. In fact, I'd get a great kick out of it.
It's sure fun to read about though, and experimenting is fun to do.
I knew a HAM who was doing this in 1994 for a company he worked with. This scientist sure is a genius when a HAM with nothing but a high school education pulled off the same thing.
Re:PHP OpenGL on SourceForge
on
OpenGL in PHP
·
· Score: 2, Insightful
I don't know what submitter of story's problem is with his computer only getting "59FPS." but I seem to get 120. Weird.
1) post your website on slashdot to boast it 2) change your website to "bah come back later" 3) everyone who wants to see the page from slashdot doesn't get to due to said message, thus defeating the purpose of being posted on slashdot 4) ???????? 5) profit!!!
Yeah, did anyone ever notice how annoying it is in GAIM.
You can't copy IM conversations to any other window, you select it, and it does nothing.
You ought' to think the gAIM developers(http://gaim.sourceforge.net) would impliment a feature that has been in operating systems since OS/2 and Mac OS 1.4
Alas, it doesn't appear so though. You can't copy things in to the "chat" box neither IIRC.
I do know for certain you can't copy stuff out of the "conversation" part of the window, and it's annoying.
It doesn't seem like it'll make it.. I mean, this would be good for gameboy or you know other device-to-device transfers but you require WIFI for it meaning I wouldn't be able to transfer stuff with a friend a work without a wi-fi designed for this purpose too.
"The plugin that I imagine, would use bayesian filtering and comparative analysis to determine a probability of a file being child pornography"
So what?
"Compared to my other anaylized childporn pictures this girl has outragiously small tits.. must be a child!"
"That girls pussy is too tight to be an adult, must be a child!"
How exactly do you think the computer will see the image and comprehend it? Why do you think theres websites that ask you to type in a word for verification -- because computers can't read:)
"Although, for and extra $9.99 a month, I can have up to 4 extra (5 total) IP address."
Also why is it IP addresses for home isps are so outragiously priced when if you co-locate a server you can get a new ip for like 50 cents extra a month
Some isps just charge you a one-time-fee of $5.00 or less, and promise to let you continue to use it as LONG as it's being used (if you dont use it they take it back)
So, what are the people supposed to do when he drives out of range from the park? Do they suppose to start following him where he goes to keep net access?
This same technolodgy was mentioned in popular science half a year ago, and had the guys name who developed it and everything.
It works by directing sounds onto an object via the air
When the waves hit your skin, you hear sound, but the waves are projected in a single direction, like a lazer beam, instead of projected everyhwhere, like a light bulb
Call this flamebait if you may, but slashdot idiot editors do it again.
They let this print as "Windows as the number one operating system within the next three years"
HERES THE REAL QUOTE FROM THE ARTICLE FOLKS:
"I think that's going to happen sooner. I believe we'll see Linux overtake Windows on the server within the next three to four years, as measured by new server shipments."
-- So, like I said, why don't the editors read the fucking article and make edits to the submission (if neccisary)?
Ugh, this has turned out just as inconsistant as the sunday morning newspaper.... details being skewed and all...
QUOTE "Why is the person outside of your country - probably also the head of a household - less deserving than the person in your country?"
Hmm, don't they have businesses in India that have computers in them, or... do they still rely on pen/paper/mail?
From what I've seen, these "Indians" have the IT jobs that have been available all the time in india to choose from, and, OH yeah, just about all of the IT jobs of the united states to choose from as well.
So, basically, the ratio of qualified people to jobs available in india is like 4:10
Meanwhile, the ratio of qualified people to jobs available in the US is like 10:4
Sounds a little unfair to me, kruat, cause not only can every head of a household get a job, but their wife, kids, and dog could too, and STILL have job openings available.
-- Meanwhile, us american 'head of the households' can't find a job, without moving to india that is...
This may seem like a negative post, but this is how I feel...
QUOTE "Manned missions to space has been and will always a dangerous job. But it's a job that they accepted and knew full well of the dangers, just like all the astronauts that came before them."
If you were friends with one of them, I feel sorry for that astronaut, as you seem like you weren't a very good one.
When you're dealing with human life you can't MAKE "mishaps", mishaps are foolish mistakes that shouldn't have happened, and something like that should NEVER happen when human life is in the equation.
Mistakes DO happen, but apparently NASA seems to have been making quite a lot over the years.
Hell, even in the mars rover spirit, its system malfunctioned because of basically the scientists not deleteing the files off the drive, and therefore it couldn't mount due to temporary data not being able to be written....
Like I said, STUPID mistake.
Hopefully they're actually checking the other shuttles top to fucking bottom and have no doubt they're in order before they restart the shuttle program next year..
In other news, you could hook up a 220VAC generator to any telco box and effectivly take out your entire citys area code...
It'd also take out any other area code as well, as long as it was directly connected using the same switching methods.... it'd just keep on going down the line...
What would happen is everyones telephone would ring and ring and possibly be electrocuted if they weren't careful handling the phone...
Not to mention anyone who was stripping their phone wiring with their teeth like I usually do when I have to strip phone wire!;p
A little off topic, but interesting non the less,..
Ask Mike Rowe or any of the other people that lose their domain name.
Mike "Rowe" sold out. They offered him an MSCE for his domain and he thought that having an MSCE would help him get a job so he gave the domain registrar password over to them...
They didn't force him to give it to them by court, they offered him an MSCE (which won't get you a new job as most MSCE's are pretty stupid) and being the kid he is WOW FREE CERT, COOL! HERE YA GO!
Slashdot Mirror
Hmmmm.. a 'ham' making new antenna discoveries...sounds familiar:-)
It is not physically possible to attain a moderate Q or low Q, thin monopole --antenna-- which is 15-18 inches on 21 MHz and is efficient. This is not a statement against K1DFT, or anyone else. It is a statement of fact, based on the physics of very electrically small antennas, and many years professionally devoted to pursuing such issues. K1DFT has apparently pursued a path long since traveled by many others, and not only myself.
Occasionally, in some form factors, it is possible to trade efficiency for gain, but this is too short for that. And so much for bandwidth.
Great care needs to be taken to remove multipath effects in the measurement of gain, and greater care needs to be taken in equating measured comparitive gain with actual antenna efficiency. Based on this anecdotal report, there is no evidence presented that such issues could be removed in the measurements.
Radiation resistance results from an antenna's sampling portions of radiating waves. A short antenna samples a small portion of the wave--and not from the peak, unless the electrical length is 1/4 to 1/2 the wave or more. Multiple current maxima do help increase radiation resistance. Efficiency is derived from the ratio of this radiation resistance to the total resistance--which includes ohmic losses. Distributed discrete loads are moderately lossy, and one would require load Q-factors of 1000 or more to attain even moderate Q antennas with high efficiency.
The optimization of distributed loads in monopoles is an old technology, recently aided via genetic algorithms. I recall, for example, some good work on this approach published in 1996 by Boas et al. Before that, R.C. Hansen made fundamental efforts into such understanding, as well as others. MATLAB is also a poor tool for this, because it is difficult to assess losses properly.
Another concern is: what is radiating? In some cases, ground planes (counterpoises) do, indeed, radiate in the far field and are thus part of the antenna. The monopole 'antenna' is often a loading mechanism in this case, and contributes little to the radiation. There are commercially used 'antennas' that are 1/10 th the height of a 1/4 wave or less; are broad/multiband/ and so on. This is not new. They are used in wireless LAN; RFID; and cell phones; and many other places.
Many here are aware of my efforts in fractal antenna technology--which started in a similar radio amateur vein. Although I applaude continued efforts into antenna experimentation through ham radio, I must confess that my educated opinion is that nothing new has, or will be, attained by such efforts. The state of the art is often not public, and far outstrips what is commonly available in, for example, amateur radio publications. I would enjoy being wrong, however. In fact, I'd get a great kick out of it.
It's sure fun to read about though, and experimenting is fun to do.
I knew a HAM who was doing this in 1994 for a company he worked with. This scientist sure is a genius when a HAM with nothing but a high school education pulled off the same thing.
I don't know what submitter of story's problem is with his computer only getting "59FPS." but I seem to get 120. Weird.
1) post your website on slashdot to boast it
2) change your website to "bah come back later"
3) everyone who wants to see the page from slashdot doesn't get to due to said message, thus defeating the purpose of being posted on slashdot
4) ????????
5) profit!!!
Yeah, did anyone ever notice how annoying it is in GAIM.
You can't copy IM conversations to any other window, you select it, and it does nothing.
You ought' to think the gAIM developers(http://gaim.sourceforge.net) would impliment a feature that has been in operating systems since OS/2 and Mac OS 1.4
Alas, it doesn't appear so though. You can't copy things in to the "chat" box neither IIRC.
I do know for certain you can't copy stuff out of the "conversation" part of the window, and it's annoying.
" Remote Desktop works fine for this type of application. You log into the box as needed, do what needs doing and then log out or disconnect."
.... ....
Okay let me pull up my list here...
Node 2 [192.168.1.x]
Node 3 [192.168.1.x]
Node 4 [192.168.1.x]
Node 5 [192.168.1.x]
Node 5 [192.168.1.x]
Node 6 [192.168.1.x]
Node 1903 [192.168.3.x]
Node 1904 [192.168.3.x]
Node 2976 [192.168.4.x]
Node 2977 [192.168.4.x]
Node 2978 [192.168.4.x]
Node 2979 [192.168.4.x]
Man, sure complicated huh?
It doesn't seem like it'll make it.. I mean, this would be good for gameboy or you know other device-to-device transfers but you require WIFI for it meaning I wouldn't be able to transfer stuff with a friend a work without a wi-fi designed for this purpose too.
IR is still a better option it appears.
"The plugin that I imagine, would use bayesian filtering and comparative analysis to determine a probability of a file being child pornography"
:)
So what?
"Compared to my other anaylized childporn pictures this girl has outragiously small tits.. must be a child!"
"That girls pussy is too tight to be an adult, must be a child!"
How exactly do you think the computer will see the image and comprehend it? Why do you think theres websites that ask you to type in a word for verification -- because computers can't read
Very professional. The links in article link to "403 Forbidden"
;)
That's a really great case.
Where can i get the forbidden case?
(editors should really check links before posting, duh)
not flamebait, just the cynical truth
I totally agree with parent and don't understand why in the hell this submission was submitted with a falsified headline.
It's really a big let down to see "OMG A TRICORDER WOW" and find out it's a PDA.
*sigh*
Another article that should have been rejected due to falsified info, or edited.
"Although, for and extra $9.99 a month, I can have up to 4 extra (5 total) IP address."
Also why is it IP addresses for home isps are so outragiously priced when if you co-locate a server you can get a new ip for like 50 cents extra a month
Some isps just charge you a one-time-fee of $5.00 or less, and promise to let you continue to use it as LONG as it's being used (if you dont use it they take it back)
Current google cash posted above doesn't seem to work -- try this one instead people
e =U TF-8&q=cache%3Ahttp%3A%2F%2Fwww.ignalum.com%2F&btn G=Search
http://66.102.9.104/search?hl=en&lr=&ie=UTF-8&o
So, what are the people supposed to do when he drives out of range from the park? Do they suppose to start following him where he goes to keep net access?
This same technolodgy was mentioned in popular science half a year ago, and had the guys name who developed it and everything.
It works by directing sounds onto an object via the air
When the waves hit your skin, you hear sound, but the waves are projected in a single direction, like a lazer beam, instead of projected everyhwhere, like a light bulb
Call this flamebait if you may, but slashdot idiot editors do it again.
They let this print as "Windows as the number one operating system within the next three years"
HERES THE REAL QUOTE FROM THE ARTICLE FOLKS:
"I think that's going to happen sooner. I believe we'll see Linux overtake Windows on the server within the next three to four years, as measured by new server shipments."
-- So, like I said, why don't the editors read the fucking article and make edits to the submission (if neccisary)?
Ugh, this has turned out just as inconsistant as the sunday morning newspaper.... details being skewed and all...
In soviet russia there is no copyright law!
quote "here, i googled for you"
;[
Useless.... that has no pictures
QUOTE "Why is the person outside of your country - probably also the head of a household - less deserving than the person in your country?"
Hmm, don't they have businesses in India that have computers in them, or... do they still rely on pen/paper/mail?
From what I've seen, these "Indians" have the IT jobs that have been available all the time in india to choose from, and, OH yeah, just about all of the IT jobs of the united states to choose from as well.
So, basically, the ratio of qualified people to jobs available in india is like 4:10
Meanwhile, the ratio of qualified people to jobs available in the US is like 10:4
Sounds a little unfair to me, kruat, cause not only can every head of a household get a job, but their wife, kids, and dog could too, and STILL have job openings available.
--
Meanwhile, us american 'head of the households' can't find a job, without moving to india that is...
This may seem like a negative post, but this is how I feel...
QUOTE "Manned missions to space has been and will always a dangerous job. But it's a job that they accepted and knew full well of the dangers, just like all the astronauts that came before them."
If you were friends with one of them, I feel sorry for that astronaut, as you seem like you weren't a very good one.
When you're dealing with human life you can't MAKE "mishaps", mishaps are foolish mistakes that shouldn't have happened, and something like that should NEVER happen when human life is in the equation.
Mistakes DO happen, but apparently NASA seems to have been making quite a lot over the years.
Hell, even in the mars rover spirit, its system malfunctioned because of basically the scientists not deleteing the files off the drive, and therefore it couldn't mount due to temporary data not being able to be written....
Like I said, STUPID mistake.
Hopefully they're actually checking the other shuttles top to fucking bottom and have no doubt they're in order before they restart the shuttle program next year..
In other news, you could hook up a 220VAC generator to any telco box and effectivly take out your entire citys area code...
;p
It'd also take out any other area code as well, as long as it was directly connected using the same switching methods.... it'd just keep on going down the line...
What would happen is everyones telephone would ring and ring and possibly be electrocuted if they weren't careful handling the phone...
Not to mention anyone who was stripping their phone wiring with their teeth like I usually do when I have to strip phone wire!
A little off topic, but interesting non the less,..
Whoops, I didn't know the .com stuff was already mentioned, ;/
Yeah, so everytime they go to a website with the TLD .COM they're going to set off a red flag.
Or, was this another example that isn't really used?
This isn't a flame, just a question
multi-player games
** Possibly useful
online casinos
** I don't think that helps better the internet
P2P Networks
** I don't think that corperations see that as bettering the internet.
anonymous remailers
** Yes I'm sure spammer businesses will like this one!
distributed computing
** DNA Folding/SETI -- THIS IS USEFUL
mobile agents
** Not too sure on this one.
My dad recalls (born in 1952) when his neighbors got color TV and he remembers everyone on the street tried to get in the house to watch it.
He remembers one time when it broke and the whole neighborhood pitched in to fix it...
Ask Mike Rowe or any of the other people that lose their domain name.
Mike "Rowe" sold out. They offered him an MSCE for his domain and he thought that having an MSCE would help him get a job so he gave the domain registrar password over to them...
They didn't force him to give it to them by court, they offered him an MSCE (which won't get you a new job as most MSCE's are pretty stupid) and being the kid he is WOW FREE CERT, COOL! HERE YA GO!
Yep..