The article said that this first test was to see if the new T-cells would live and if there would be any effect on the HIV load. This isn't the cure, only a step in that direction.
I loved those! Small transistors overshadowed by this enormous military surplus crystal in a mammoth holder (at least on mine). They worked, though, and went a long way toward teaching radio theory to my (dare I say 'our') generation.
The wikipedia article on the Arecibo Observatory claims that it can "...view all of the planets in the solar system, though the round trip light time to objects beyond Saturn is longer than the time the telescope can track it, preventing radar observations of more distant objects."
You could do EMercuryE, EVE, EmoonE, EMarsE, EJE, etc.
According to my crude calculations, if they had enough power they could image Sedna since the round-trip light time is about one sidereal day. That boggles the mind - send a pulse, wait a whole day for the Earth to revolve, and receive the echo!
Seriously, the only limiting factor to having an antenna connected directly* to an A/D is dynamic range. Picking out a tiny little SSB signal on 40m with multi-megawatt broadcast stations a few kHz away isn't something you can easily do with a 16 or 20 bit A/D. You realize that the VFO's of yore are now NCO's, and that mixers are available that span nearly DC to light, right? The only 'radio hardware' (which could be a single 8 pin DIP) would be an optional variable gain amp, the mixer, the NCO, and maybe an IF filter. Let's see - two antenna pins, two power pins, two output pins, and two serial control pins for the VGA and NCO. Yep, that's 8.
* For certain values of 'directly'. I admit that a LP filter would be good to prevent Nyquist aliasing from transmitters above half the sampling frequency.
Good point. Standing on this dish surface would only involve the gain of the feedhorn, not the dish. IIRC, the dish has about 60dB of gain - a factor of 1 million. For 430 MHz, that's 2.5TW peak / 1e6 = 2.5MW at the antenna. At 2380 MHz, it's 20TW / 1e6 = 20 MW. Another source claims approximately 70dB, so that knocks it down another factor of ten. Depending on the illumination pattern of the feedhorn, I would bet that you'd be over the limits near the axis. 2MW @ 2380 MHz sounds an awful lot like the world's largest microwave oven to me.
I yearn for that sort of gain - could you imagine the EME potential with 2.5TW EIRP @ 430MHz?
I didn't mean to knock any/all of their accomplishments, even if it was only building an antenna - my angst is directed at the news article that claims something novel and/or unique. For Pete's sake, a little research would've gone a long way.
Don't diss the attraction of FIRE! High-speed, Eye-poking FIRE!
Seriously, making model rockets is a great way to demonstrate propulsion. Making a radio yourself is a great way to understand electronics. HAVING SOME NEWS NERD CLAIM IT'S THE FIRST TIME EVAAAR is just sad.
If your daughter's class was on national news as having made the first 'Rockety-thing' ever, I'd have the same attitude of the press and masses - nothing against your daughter's (or these Canadian's) accomplishments, but neither is revolutionary, or even unique.
I apologize for misreading sarcasm. I agree that there's more damage possible today, but so far Amateur radio equipment is not required to have FCC type acceptance unless you sell it. I can still cobble together my own tube AM 2m rig, if I want to, as long as it meets the appropriate spectral purity requirements (a relatively low bar). Whether or not there's anyone else out there to talk to on AM on 2m is another story. I guess 10 GHz/47 GHz/241 GHz/etc are today's 2m/70cm of yesteryear.
As for knowing what's going on, I'd love for more kids to think they have a chance at understanding (and contributing to) something akin to magic. My father understands electricity, but has no idea of what's going on inside of computers. People of my generation understand computers from the AC cord up because we built them from tubes/transistors/LSI chips. The current generation understands computers as modular board-level appliances, but in general does not understand the inner workings of the boards. Some day, computers will be 'closed' appliances, like today's microwave, that will be worshipped as the 'magic' appliance you mention.
Interesting phenomenon - I'll have to check that out.
From wikipedia: The telescope has three radar transmitters, with effective isotropic radiated powers of 20TW at 2380 MHz, 2.5TW (pulse peak) at 430 MHz, and 300MW at 47 MHz.
Yeah, I'm getting conflicting info. First they built the radio, then they didn't. Then they build the antenna, then they didn't. Are they getting press for screwing on N-connectors?
I chatted with an [astro|cosmo]naut on MIR once from the radio in my car while standing in a parking lot in NJ watching them fly overhead. After seeing them fade into shadow, I asked the [astro|cosmo]naut if that was a pretty sunset. He was shocked that I knew he'd just gone into shadow. I told him I was watchin', so he'd better behave.
I can't tell if you're trying to be sarcastic or not.
The general populace 'back then' actually had to have a little smarts to replace tubes in their TVs and radios. Every drug store had a tube tester and usually sold tubes. With the advent of 'black box' transistorized appliances, the need to know anything about what's going on inside went the way of the vacuum tube - into history.
No, they perpetrated a worse blasphemy than building a kit - according to their website, they purchased a friggin' tranceiver!
Many, many hams have the brains and skill to actually DESIGN AND BUILD something as opposed to following cookbook designs and solder pre-supplied parts down and call it a miracle. If their website is correct, they did neither wrt the radio.
You're correct about needing to encourage curiosity - perhaps I'm a bit pessimistic about the future. I'd love for it to be part of a 'real' science and technology curriculum in high school instead of teaching to the SOL test (such a deliciously ironic acronym).
Don't kids these days wonder at all how the world around them works? I couldn't read/experiment enough when I was young; hell, I still can't find enough time to investigate everything I want to. I want to know how everything works from the electrons up.
I was going to pounce on the same point (that of the fact that there's no RF danger at typical Earth-to-LEO power levels), but then I realized he was thinking along the lines of jamming/busting in on NASA comms with a fake message and making them lose their concentration.
Slightly off-topic: there was an article about a guy at Arecibo that was going to attempt to radar map an asteroid. The article provided the power level, frequency, and gain of the dish. I plugged those numbers into an RF exposure limit calculator and found that the uncontrolled exposure zone extended past low Earth orbit! I warned him to take that into account before he nuked the astronauts on the shuttle and/or ISS.
It's going to be considerably more difficult for the next generation to build their first radios, once it's all gone digital.
You mean "write their first radios", since the era of hardware radios is essentially over? With the availability of very high speed/very high dynamic range ADCs and FPGAs capable of doing MPEG-4 decoding on the fly, I doubt you'll see much "building" and a lot more "writing" going on. Wanna get involved? Start Here.
Yes, they did. They did not use a commercially manufactured radio, however. From TFA:
While school contacts with the space station are routinely made through the Amateur Radio on the International Space Station program, many of those contacts are made using a traditional ham radio.
They made their own radio that used Amateur Radio frequencies (nitpick: Amateur Satellite Service freqs) as opposed to using a Yaesu or Kenwood radio on Amateur freqs. To hams like me, this isn't a big deal. Designing software-defined radios and protocols that can span Virginia->New Zealand using 1W of power is cool, but making an 5W VHF or UHF radio is so 1970's.
Yawn. While not just anyone can do what they've done, I'm saddened by the fact that an Amateur Radio hobbyist making a simple FM transceiver is considered news-worthy by the masses. What happened to the spirit of 'Experimentation and Advancement of The Radio Art'? Have we as a species lost our curiosity and drive to learn about and then do new things? I guess the TV has won. 8-(
The tags read in the video appear to be standard Class1Gen2 UHF tags encoded in EPC GDTI-96 format. Nothing would prevent you from writing that tag ID into any number of tags - I have programmed Class1Gen2 UHF tags for use with DOD CAGE codes in this exact manner.
...3 standard EPC tags formatted as GDTI-96's (non-PDF). The GS1 Company Prefix is 0893599002, and the Document Type is 1. The serial numbers are there as well, but I'm not going to post them.
My MacBook Pro's DVI port works great at 1920x1080 with my 52" LCD TV. I bought a $5 DVI-M to HDMI-F converter from Parts Express and used one of their cheap 10m cables. It looks great. I'm a very satisfied customer of theirs - their prices are great, and the products do what they claim.
I would say the fairest way would be to compare percentages of total consumption provided by solar power. That takes in to account non-person-specific infrastructure uses like streetlights, factories, etc. The US consumes a total of X gigawatt-hrs each year with Y gigawatt-hrs of that from solar panels. Rating = Y/X.
Naturally someone will suggest a formula that punishes the US for being such an extravagant consumer of power.
Slashdot Mirror
The article said that this first test was to see if the new T-cells would live and if there would be any effect on the HIV load. This isn't the cure, only a step in that direction.
Ditto for Claritin and Clarinex. Loratadine vs Desloratadine.
I loved those! Small transistors overshadowed by this enormous military surplus crystal in a mammoth holder (at least on mine). They worked, though, and went a long way toward teaching radio theory to my (dare I say 'our') generation.
The wikipedia article on the Arecibo Observatory claims that it can "...view all of the planets in the solar system, though the round trip light time to objects beyond Saturn is longer than the time the telescope can track it, preventing radar observations of more distant objects."
You could do EMercuryE, EVE, EmoonE, EMarsE, EJE, etc.
According to my crude calculations, if they had enough power they could image Sedna since the round-trip light time is about one sidereal day. That boggles the mind - send a pulse, wait a whole day for the Earth to revolve, and receive the echo!
What is this thing "IF"? 8-)
Seriously, the only limiting factor to having an antenna connected directly* to an A/D is dynamic range. Picking out a tiny little SSB signal on 40m with multi-megawatt broadcast stations a few kHz away isn't something you can easily do with a 16 or 20 bit A/D. You realize that the VFO's of yore are now NCO's, and that mixers are available that span nearly DC to light, right? The only 'radio hardware' (which could be a single 8 pin DIP) would be an optional variable gain amp, the mixer, the NCO, and maybe an IF filter. Let's see - two antenna pins, two power pins, two output pins, and two serial control pins for the VGA and NCO. Yep, that's 8.
* For certain values of 'directly'. I admit that a LP filter would be good to prevent Nyquist aliasing from transmitters above half the sampling frequency.
Good point. Standing on this dish surface would only involve the gain of the feedhorn, not the dish. IIRC, the dish has about 60dB of gain - a factor of 1 million. For 430 MHz, that's 2.5TW peak / 1e6 = 2.5MW at the antenna. At 2380 MHz, it's 20TW / 1e6 = 20 MW. Another source claims approximately 70dB, so that knocks it down another factor of ten. Depending on the illumination pattern of the feedhorn, I would bet that you'd be over the limits near the axis. 2MW @ 2380 MHz sounds an awful lot like the world's largest microwave oven to me.
I yearn for that sort of gain - could you imagine the EME potential with 2.5TW EIRP @ 430MHz?
I didn't mean to knock any/all of their accomplishments, even if it was only building an antenna - my angst is directed at the news article that claims something novel and/or unique. For Pete's sake, a little research would've gone a long way.
Don't diss the attraction of FIRE! High-speed, Eye-poking FIRE!
Seriously, making model rockets is a great way to demonstrate propulsion. Making a radio yourself is a great way to understand electronics. HAVING SOME NEWS NERD CLAIM IT'S THE FIRST TIME EVAAAR is just sad.
If your daughter's class was on national news as having made the first 'Rockety-thing' ever, I'd have the same attitude of the press and masses - nothing against your daughter's (or these Canadian's) accomplishments, but neither is revolutionary, or even unique.
I apologize for misreading sarcasm. I agree that there's more damage possible today, but so far Amateur radio equipment is not required to have FCC type acceptance unless you sell it. I can still cobble together my own tube AM 2m rig, if I want to, as long as it meets the appropriate spectral purity requirements (a relatively low bar). Whether or not there's anyone else out there to talk to on AM on 2m is another story. I guess 10 GHz/47 GHz/241 GHz/etc are today's 2m/70cm of yesteryear.
As for knowing what's going on, I'd love for more kids to think they have a chance at understanding (and contributing to) something akin to magic. My father understands electricity, but has no idea of what's going on inside of computers. People of my generation understand computers from the AC cord up because we built them from tubes/transistors/LSI chips. The current generation understands computers as modular board-level appliances, but in general does not understand the inner workings of the boards. Some day, computers will be 'closed' appliances, like today's microwave, that will be worshipped as the 'magic' appliance you mention.
73 de k4det
Interesting phenomenon - I'll have to check that out.
From wikipedia: The telescope has three radar transmitters, with effective isotropic radiated powers of 20TW at 2380 MHz, 2.5TW (pulse peak) at 430 MHz, and 300MW at 47 MHz.
I'm not standing on that dish, no way, no how!
Yeah, I'm getting conflicting info. First they built the radio, then they didn't. Then they build the antenna, then they didn't. Are they getting press for screwing on N-connectors?
I chatted with an [astro|cosmo]naut on MIR once from the radio in my car while standing in a parking lot in NJ watching them fly overhead. After seeing them fade into shadow, I asked the [astro|cosmo]naut if that was a pretty sunset. He was shocked that I knew he'd just gone into shadow. I told him I was watchin', so he'd better behave.
I can't tell if you're trying to be sarcastic or not.
The general populace 'back then' actually had to have a little smarts to replace tubes in their TVs and radios. Every drug store had a tube tester and usually sold tubes. With the advent of 'black box' transistorized appliances, the need to know anything about what's going on inside went the way of the vacuum tube - into history.
They didn't just build a kit.
No, they perpetrated a worse blasphemy than building a kit - according to their website, they purchased a friggin' tranceiver!
Many, many hams have the brains and skill to actually DESIGN AND BUILD something as opposed to following cookbook designs and solder pre-supplied parts down and call it a miracle. If their website is correct, they did neither wrt the radio.
Don't kids these days wonder at all how the world around them works? I couldn't read/experiment enough when I was young; hell, I still can't find enough time to investigate everything I want to. I want to know how everything works from the electrons up.
Slightly off-topic: there was an article about a guy at Arecibo that was going to attempt to radar map an asteroid. The article provided the power level, frequency, and gain of the dish. I plugged those numbers into an RF exposure limit calculator and found that the uncontrolled exposure zone extended past low Earth orbit! I warned him to take that into account before he nuked the astronauts on the shuttle and/or ISS.
It's going to be considerably more difficult for the next generation to build their first radios, once it's all gone digital.
You mean "write their first radios", since the era of hardware radios is essentially over? With the availability of very high speed/very high dynamic range ADCs and FPGAs capable of doing MPEG-4 decoding on the fly, I doubt you'll see much "building" and a lot more "writing" going on. Wanna get involved? Start Here.
They made their own radio that used Amateur Radio frequencies (nitpick: Amateur Satellite Service freqs) as opposed to using a Yaesu or Kenwood radio on Amateur freqs. To hams like me, this isn't a big deal. Designing software-defined radios and protocols that can span Virginia->New Zealand using 1W of power is cool, but making an 5W VHF or UHF radio is so 1970's.
Yawn. While not just anyone can do what they've done, I'm saddened by the fact that an Amateur Radio hobbyist making a simple FM transceiver is considered news-worthy by the masses. What happened to the spirit of 'Experimentation and Advancement of The Radio Art'? Have we as a species lost our curiosity and drive to learn about and then do new things? I guess the TV has won. 8-(
Why always nuclear explosions simulation is the primary use for this type of computer?
Would you rather they test nuclear explosions for real?
The tags read in the video appear to be standard Class1Gen2 UHF tags encoded in EPC GDTI-96 format. Nothing would prevent you from writing that tag ID into any number of tags - I have programmed Class1Gen2 UHF tags for use with DOD CAGE codes in this exact manner.
...3 standard EPC tags formatted as GDTI-96's (non-PDF). The GS1 Company Prefix is 0893599002, and the Document Type is 1. The serial numbers are there as well, but I'm not going to post them.
My MacBook Pro's DVI port works great at 1920x1080 with my 52" LCD TV. I bought a $5 DVI-M to HDMI-F converter from Parts Express and used one of their cheap 10m cables. It looks great. I'm a very satisfied customer of theirs - their prices are great, and the products do what they claim.
UCSD is very progressive.
Yeah, but your artists suck. I thought is was a red rubber ducky.
I would say the fairest way would be to compare percentages of total consumption provided by solar power. That takes in to account non-person-specific infrastructure uses like streetlights, factories, etc. The US consumes a total of X gigawatt-hrs each year with Y gigawatt-hrs of that from solar panels. Rating = Y/X.
Naturally someone will suggest a formula that punishes the US for being such an extravagant consumer of power.