Yep - I've done it, and it worked great! I made an El-Torito image of a DOS bootable floppy, and put the flash program and image on the CD. It sure beats the "Rrrr...Rrrr...Rrrr" sound of a bad sector on a floppy.
...and go with this coffee concentrate. Pour a capful into your cup, fill with cold water, nuke 2 min. It tastes great, and you can adjust the amount to taste. They sell it in many stores, and offer it by mail.
Read how they make this stuff - they actually distill off the aromatics and belnd them back in after reducing the coffee down to a concentrate!
At lastly, since they only have enough money to pay people to run them for a couple months, why design a rover to last years?
I don't know about years, but it'd be cool to have the power margin to transmit data back to earth or thru the orbiters round-the-martian-clock. The nights on mars are wasted as far as lengthy comms sessions go. The Mossbauer can do long-term integration overnight, but that's about it.
Is the size of the dish on a radio telescope analogous to the size of the mirror on a more typical visible-light telescope?
Yes. The larger the dish, the higher the gain and narrower the beamwidth. At microwave freqs (the rovers are around 8 GHz) the 'figure' of the dish becomes very important. An error of 1/10 lambda (wavelength) can mess up the pattern of a dish.
In yesterday's briefing, Jennifer Trosper mentioned usinig the RAT brush to clean accumulated dust off of Adirondack before taking surface measurements with the Mossbauer and APXS.
I have Dish Network, and I'm pretty happy with it. It does lose signal during _very_ intense thunderstorms, but usually not for long. It's actually a nice warning - the TV signal blanks out about 5-10 min before the deluge comes - just long enough to get the dogs into the yard to do their business. NASA is on channel 213, and rules! I have one of their PVR's - it's not as nice as an real Tivo, but it doesn't suck. It really does change the way you watch TV.
The best reason to choose satellite over cable is the ability to watch TV during power outages/natural disasters. I have a generator, and as long as that puppy is running, I've got satellite reception and local channels. When hurricane Isabel whacked the Richmond, VA area, cable's TV and 'net access were both out for 3-4 weeks! Ouch!
Most hams do create their monniker from the suffix of their call. It sounds unique amid the rest of the correct phonetics out there. As already stated, you can choose your call within a few limits. Mine call is a so-called 'vanity call'.
I had aDECTalk from circa 1987 that could sing. It even had many voices - Perfect Paul, Beautiful Betty, etc. You've never lived until you've heard Perfect Paul singing "Ave Maria". I wrote a MIDI to DECtalk converter long ago.
When you turn it on, it says, "DECTalk version two point zero is RUNning".
I understand the bidirectionality of leaky coax - if the interfering 'buzz' extends into the GHz, you'll have problems regardless of whether you use leaky coax or over the air reception. I had assumed that you'd use a DRO filter and preamp on the coax to feed the receiver. Only RF interference in-band would matter. Just a thought. Good luck with your awesome technical challenge!
You're welcome. I hate to bring it up, but have you thought about a "leaky coax" system? the antennas consist of a semi-shielded coax that is designed to 'leak' signal out along the cable, but not too far from the cable. (Like the travel info stations along a highway, for instance. The cable might span 2 miles, but the signal is undetectable a few hundred feet from the road.) You might think about stringing some leaky coax along major thoroughfares to serve customers near the antenna. Having the antenna near street-level would help reduce oversubscription and multipath. Feed each [frequency diverse] leaky coax segment with fiber. Oh yeah, NYC doesn't have overhead utiliities - OK, use it around the buildings in a block, attached high enough to not be unsightly.
You can use spatial diversity (which is similar to cranking down the power, really), frequency diversity, and polarization diversity to prevent interference. If you choose frequency-agile user equipment, you could deploy many hotspots covering a particular area and use signal strength to choose which to use (a la cell phones). Similarly, using polarized antennas can lead to significantly less interference (rhcp vs lhcp, not just horiz vs vertical).
For instance: Using fairly directional antennas, aim RHCP signals north on even GHz every few blocks across lower Manhattan, and LHCP signals every few blocks pointing west on odd GHz down the west side. Form a grid of access using both freq and polarization diversity. Naturally you could alternate sites east/west, north/south so reception would be equalized around the island.
Depending on what you call 'Space Initiative", it alreadyexists. Amsat is a worldwide organization that designs, builds, and launches Amateur Radio satellites. They would love to have volunteers to help out, and are willing to add other payloads (like cameras, etc) to their spacecraft. They're even thinking about a Mars mission!.
Join AMSAT, and help us open up space to the people!
... silver requires nitrogen or sulphur compounds to tarnish...
Isn't 78% of the atmosphere nitrogen? Wouldn't the air trapped in the voids and around the heatsink tarnish the silver? Maybe your sentence parses "silver requires (nitrogen compounds) or (sulphur compounds)..." instead of "... (nitrogen) or (sulphur compounds)...".
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Yep - I've done it, and it worked great! I made an El-Torito image of a DOS bootable floppy, and put the flash program and image on the CD. It sure beats the "Rrrr...Rrrr...Rrrr" sound of a bad sector on a floppy.
To my knowledge, nobody has EVER successfully made anything digital tamperproof.
Divx (not the codec) was never cracked. Too bad no one has the chance to try anymore; it was cool.
If they found that you were AGAIN in violation you were terminated.
Your service was terminated, right? I've heard of "substantial penalties" for breach of contract, but termination? Jeez!
...and go with this coffee concentrate. Pour a capful into your cup, fill with cold water, nuke 2 min. It tastes great, and you can adjust the amount to taste. They sell it in many stores, and offer it by mail.
Read how they make this stuff - they actually distill off the aromatics and belnd them back in after reducing the coffee down to a concentrate!
What I want to know is what do Erica and Clare look like? Pics, dammit!
She specifically mentioned that a RAT BRUSH was going to be used before "RATting" the rock.
WTFNC (watch the ** news conference).
Jennifer Trosper said in a recent news conference that the one-way light time to the rovers was 11 min 45 sec. Ouch!
At lastly, since they only have enough money to pay people to run them for a couple months, why design a rover to last years?
I don't know about years, but it'd be cool to have the power margin to transmit data back to earth or thru the orbiters round-the-martian-clock. The nights on mars are wasted as far as lengthy comms sessions go. The Mossbauer can do long-term integration overnight, but that's about it.
Is the size of the dish on a radio telescope analogous to the size of the mirror on a more typical visible-light telescope?
Yes. The larger the dish, the higher the gain and narrower the beamwidth. At microwave freqs (the rovers are around 8 GHz) the 'figure' of the dish becomes very important. An error of 1/10 lambda (wavelength) can mess up the pattern of a dish.
In yesterday's briefing, Jennifer Trosper mentioned usinig the RAT brush to clean accumulated dust off of Adirondack before taking surface measurements with the Mossbauer and APXS.
I have Dish Network, and I'm pretty happy with it. It does lose signal during _very_ intense thunderstorms, but usually not for long. It's actually a nice warning - the TV signal blanks out about 5-10 min before the deluge comes - just long enough to get the dogs into the yard to do their business. NASA is on channel 213, and rules! I have one of their PVR's - it's not as nice as an real Tivo, but it doesn't suck. It really does change the way you watch TV.
The best reason to choose satellite over cable is the ability to watch TV during power outages/natural disasters. I have a generator, and as long as that puppy is running, I've got satellite reception and local channels. When hurricane Isabel whacked the Richmond, VA area, cable's TV and 'net access were both out for 3-4 weeks! Ouch!
And trimming the hedges.
9nm??!! The quantum effects would be crippling! Oh, you mean 90nm. Whew! :-)
Most hams do create their monniker from the suffix of their call. It sounds unique amid the rest of the correct phonetics out there. As already stated, you can choose your call within a few limits. Mine call is a so-called 'vanity call'.
... this guy (ka6mwd), or this guy (kc6mwd), or this guy (ke6mwd), or this guy (w6mwd)?
...read the URL to VxWorks as WinDriver.com instead of WindRiver.com?
I had a DECTalk from circa 1987 that could sing. It even had many voices - Perfect Paul, Beautiful Betty, etc. You've never lived until you've heard Perfect Paul singing "Ave Maria". I wrote a MIDI to DECtalk converter long ago.
When you turn it on, it says, "DECTalk version two point zero is RUNning".
I understand the bidirectionality of leaky coax - if the interfering 'buzz' extends into the GHz, you'll have problems regardless of whether you use leaky coax or over the air reception. I had assumed that you'd use a DRO filter and preamp on the coax to feed the receiver. Only RF interference in-band would matter. Just a thought. Good luck with your awesome technical challenge!
You're welcome. I hate to bring it up, but have you thought about a "leaky coax" system? the antennas consist of a semi-shielded coax that is designed to 'leak' signal out along the cable, but not too far from the cable. (Like the travel info stations along a highway, for instance. The cable might span 2 miles, but the signal is undetectable a few hundred feet from the road.) You might think about stringing some leaky coax along major thoroughfares to serve customers near the antenna. Having the antenna near street-level would help reduce oversubscription and multipath. Feed each [frequency diverse] leaky coax segment with fiber. Oh yeah, NYC doesn't have overhead utiliities - OK, use it around the buildings in a block, attached high enough to not be unsightly.
You can use spatial diversity (which is similar to cranking down the power, really), frequency diversity, and polarization diversity to prevent interference. If you choose frequency-agile user equipment, you could deploy many hotspots covering a particular area and use signal strength to choose which to use (a la cell phones). Similarly, using polarized antennas can lead to significantly less interference (rhcp vs lhcp, not just horiz vs vertical).
For instance: Using fairly directional antennas, aim RHCP signals north on even GHz every few blocks across lower Manhattan, and LHCP signals every few blocks pointing west on odd GHz down the west side. Form a grid of access using both freq and polarization diversity. Naturally you could alternate sites east/west, north/south so reception would be equalized around the island.
Good luck!
Depending on what you call 'Space Initiative", it already exists. Amsat is a worldwide organization that designs, builds, and launches Amateur Radio satellites. They would love to have volunteers to help out, and are willing to add other payloads (like cameras, etc) to their spacecraft. They're even thinking about a Mars mission!.
Join AMSAT, and help us open up space to the people!
They also claim that is is 70% silver by weight.
Isn't 78% of the atmosphere nitrogen? Wouldn't the air trapped in the voids and around the heatsink tarnish the silver? Maybe your sentence parses "silver requires (nitrogen compounds) or (sulphur compounds) ..." instead of "... (nitrogen) or (sulphur compounds) ...".
An Italian restaurant near me sells "Child Spaghetti"...
Weigh a random case one a week, maybe? It'd be hard to fake the lost mass of 70% silver by weight.