from the OpticsExpress paper: "measured propagation losses were 4.3 dB/m at 2.936 μm" 100x more than regular fiber, at wavelengths we don't use for communications... I'm not sure if I see how this is useful.
Actually, it's worse. You failed to note that these guys measure in dB/m, whereas typical fiber losses are in dB/km...
It is because of this kind of crap we don't have 15 megabit pipes for 30 bucks a month like South Korea does.
Partly. Others already have given the other good reason, which is geography and population density. But both S-Korea and Japan have been actively driving for a large broadband network.
The situation in Japan comes from the fact that NTT (the biggest player) was previously government owned. Japan started slowly with cable-TV penetration, which at the moment gives them an advantage. They came late to the cable-TV market, and started using fiber from the beginning, contrary to the U.S. which has coax access networks all over. And, since at the time NTT was govenrment owned (80's part of 90's?) the cost went to the general public.
S-Korea on the other hand has had several government backed projects that aim to get broadband connections available to all... New buildings are classified by their fiber infrastructure in order to get the builders include FTTB or FTTH.
When moving into the underwater realm, do it with style! "Real" underwater scooters have more power than necessary for beginner divers, and they're loads of fun. Originally used by cave divers and technical divers on deep wrecks, they are creeping into the use of recreational divers. Check out the pictures of SS and Gavin.
There's nothing like strapping yourself to an electrical torpedo from the crotch...
I would be VERY interested in such a software that is able to compress uncompressed AVI files (like the ones most tv-cards make) to MPEG4. i read the FlaskMPEG features page and only MPEG1 and MPEG2 were mentioned in the decoding section.
It would be quite good to be able to compress (to MPEG4) own video material grabbed with a tv-card. Has anyone tried or succeeded?
For an English speaker this Latin-derived name may associate with "durable", but for the Russian speakers it will probably associate with "durak", that means fool in Russian.
Totally offtopic, but this popped the Galen character from Crusade into my mind:
Galen (in swedish) = nuts, idiot, crazy person
Once you know that, you just can't take that character seriously anymore...
By doped sections of fiber with a high voltage placed across each section, they were able to create an amplifier. The light waves coming into the doped section of fiber would be amplified.
Actually, the doped fiber section is not connected to a high voltage, but to a pump laser, which excites the doped ions in the fiber. Ions (rare earth metals) in an excited state make lasing possible at the signal's wavelength.
Basically the doped fiber is a laser without a resonator cavity => light coming into the doped section will amplify.
About mouse usage with keyboard
on
Interface Zen
·
· Score: 4
Just the other day I witnessed someone who used his mouse with his foot. He had both of his hands at the keyboard and (quite effectively) moved in the X-environment with his foot...
He said it took approx. 2 weeks to master the Art, but it was worth it. The advantages were about the same as what was mentioned in the article as drawbacks with the mouse. The advantages were:
One doesn't have to take eyes off the screen while mouse is required,
One doesn't have to move the hand away from the keyboard when mouse is required,
No one at the workplace wants to borrow his mouse.
I ain't gonna try it (since I like to keep my feet in my shoes while at work), but at least some hardcore zen-wannabe could try this one for kicks.:)
Little white lies in benchmarking are not only found in NT vs. Linux setups but also in optical networking. Usually these high-speed records in modern DWDM models are achieved by sending _the same data_ on all (in this case) 80 channels. By using the same data on all channels the most problematic error sources (optical crosstalk between channels and such) are minimized and the signal-noise ratio is therefore way better.
In other words, they do transmit 80*80gbits/sec of data, but the actual information they transmit is (merely?) 80gbits/sec. So, unfortunately these setups are far from the real thing, but maybe someday...
Oh, and the high-bandwidth transmitters and receivers do work better in stable conditions such as a research laboratory. Try that in an actual environment and be surprised. Lasers and PIN-diodes are temperature-dependent and chirp becomes a problem in high-bandwith lasing. (Chirp = a change in laser wavelength when laser diode's current changes.) The bright side is, that at least these things are under intense research.
No apologies for any misspellings, this ain't my best language.:)
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from the OpticsExpress paper:
"measured propagation losses were 4.3 dB/m at 2.936 μm"
100x more than regular fiber, at wavelengths we don't use for communications... I'm not sure if I see how this is useful.
Actually, it's worse. You failed to note that these guys measure in dB/m, whereas typical fiber losses are in dB/km...
An important question, and only jokes as answers. Not much hardware available for 100Gbps testing, and if they don't want to roll their own they may use something like this BERT, Agilent E4898A, see http://cp.literature.agilent.com/litweb/pdf/5989-4 750EN.pdf#search=%22E4898A%22 .
It is because of this kind of crap we don't have 15 megabit pipes for 30 bucks a month like South Korea does.
Partly. Others already have given the other good reason, which is geography and population density. But both S-Korea and Japan have been actively driving for a large broadband network.
The situation in Japan comes from the fact that NTT (the biggest player) was previously government owned. Japan started slowly with cable-TV penetration, which at the moment gives them an advantage. They came late to the cable-TV market, and started using fiber from the beginning, contrary to the U.S. which has coax access networks all over. And, since at the time NTT was govenrment owned (80's part of 90's?) the cost went to the general public.
S-Korea on the other hand has had several government backed projects that aim to get broadband connections available to all... New buildings are classified by their fiber infrastructure in order to get the builders include FTTB or FTTH.
There's nothing like strapping yourself to an electrical torpedo from the crotch...
(yeah, windows format, flamethrowers on...)
I would be VERY interested in such a software that is able to compress uncompressed AVI files (like the ones most tv-cards make) to MPEG4. i read the FlaskMPEG features page and only MPEG1 and MPEG2 were mentioned in the decoding section.
It would be quite good to be able to compress (to MPEG4) own video material grabbed with a tv-card. Has anyone tried or succeeded?
-Kooma
Totally offtopic, but this popped the Galen character from Crusade into my mind:
Galen (in swedish) = nuts, idiot, crazy person
Once you know that, you just can't take that character seriously anymore...
Actually, the doped fiber section is not connected to a high voltage, but to a pump laser, which excites the doped ions in the fiber. Ions (rare earth metals) in an excited state make lasing possible at the signal's wavelength.
Basically the doped fiber is a laser without a resonator cavity => light coming into the doped section will amplify.
He said it took approx. 2 weeks to master the Art, but it was worth it. The advantages were about the same as what was mentioned in the article as drawbacks with the mouse. The advantages were:
One doesn't have to take eyes off the screen while mouse is required,
One doesn't have to move the hand away from the keyboard when mouse is required,
No one at the workplace wants to borrow his mouse.
I ain't gonna try it (since I like to keep my feet in my shoes while at work), but at least some hardcore zen-wannabe could try this one for kicks. :)
-kooma
In other words, they do transmit 80*80gbits/sec of data, but the actual information they transmit is (merely?) 80gbits/sec. So, unfortunately these setups are far from the real thing, but maybe someday...
Oh, and the high-bandwidth transmitters and receivers do work better in stable conditions such as a research laboratory. Try that in an actual environment and be surprised. Lasers and PIN-diodes are temperature-dependent and chirp becomes a problem in high-bandwith lasing. (Chirp = a change in laser wavelength when laser diode's current changes.) The bright side is, that at least these things are under intense research.
No apologies for any misspellings, this ain't my best language. :)