with 2.5 Watts I can talk to 30 people around the globe using PSK31 or Wspr.
I've got that record beat at least on WSPR. I xmitted on 30m using 100mW from central VA (grid FM17), and was heard in New Zealand. An amazing mode, isn't it?
You're incorrect. Part 15 devices are absolutely required to not cause interference. From the link, emphasis mine:
(a) Persons operating intentional or unintentional radiators shall not be deemed to have any vested or recognizable right to continued use of any given frequency by virtue of prior registration or certification of equipment, or, for power line carrier systems, on the basis of prior notification of use pursuant to 90.35(g) of this chapter.
(b) Operation of an intentional, unintentional, or incidental radiator is subject to the conditions that no harmful interference is caused and that interference must be accepted that may be caused by the operation of an authorized radio station, by another intentional or unintentional radiator, by industrial, scientific and medical (ISM) equipment, or by an incidental radiator.
(c) The operator of a radio frequency device shall be required to cease operating the device upon notification by a Commission representative that the device is causing harmful interference. Operation shall not resume until the condition causing the harmful interference has been corrected.
Maybe she's trying to tell you to buy her a cordless vacuum.
My favorite was the coworker that set up a UPS on a server and left for the day. I got a call an hour later saying the server had stopped responding. It turns out that the coworker plugged the UPS INTO ITSELF, and left it running. From that day on his nickname was 'loopback'.
I always post to the wrong duplicate article! ~sarcasm
From my other post:
According to line 'A' on this graph, the atmospheric absorption at 95-100 GHz is fairly low, but this graph shows that rainfade is an absolute killer. Light rain contributes 1 dB/km, which amounts to losing 20.6% of your signal per km. After 10km, you're under 1% of your original signal.
Somewhere between medium and heavy rain you cross the 10 dB/km line - you lose 90% of your signal per km. That ventures into 'unusable' territory very quickly.
In a world where several BILLION up-and-coming wage earners are ripe to purchase their products, which, incidentally, wouldn't exist if not for the cheap labor still extant in that very same country.
According to line 'A' on this graph, the atmospheric absorption at 95-100 GHz is fairly low, but this graph shows that rainfade is an absolute killer. Light rain contributes 1 dB/km, which amounts to losing 20.6% of your signal per km. After 10km, you're under 1% of your original signal.
Somewhere between medium and heavy rain you cross the 10 dB/km line - you lose 90% of your signal per km. That ventures into 'unusable' territory very quickly.
Why you link an article about hypothetical nano technology is bejond me
Because it's fascinating, and it mentions the extreme energy density of other 'safe' radionuclides besides Plutonium 238. That was the question that was asked in the parent post, after all.
As for efficiency, I bet a closed-cycle Stirling Engine system could work on Mars with Gd148 as the heat source and a radiative heat sink to space or the (almost non-existent) Mars atmosphere as the sink. Naturally you could parallel the Gd148 sources so that no one source exceeded the max temp for the engine. If you're not willing to do that, there are other non-moving solutions that beat the paltry 3-7% of an RTG.
I remember seeing that dish when I worked at Concurrent Computer in nearby Oceanport. I also volunteered at Ft. Monmouth during the 1st Gulf war operating their Army MARS station AAR2USI providing comms between deployed soldiers and their families stateside.
... IMHO is to walk away before you lose you marbles tilting at windmills.
You assume RTG technology - I don't and I don't think the linked article does, either.
They discuss Energy Organs here, stating that (emphasis mine):
a sphere of Gd148 emitting ~100 watts with a 75-year half-life and measuring 3.41 cm in diameter with a 5-micron Pt shield glows at 1326 K (e-sub-r for Pt at 1326 K is 0.156; Gd melting point ~1585 K, Pt melting point ~2042 K); this is approximately the decomposition temperature of diamond (into graphite) and well above the combustion point for diamond in air (Section 6.5.3), so Pt-coated sapphire (sapphire melting point ~2310 K) may provide a more stable first wall for the radionuclide energy organ. Carnot thermal efficiency for a heat engine using this source could reach, at most, ~76%.
I'd say that's pretty good efficiency, and given the power levels and temperatures, I think non-RTG technologies should be used. If the system never drops below 0C, why not use a more conventional system?
Plus, you could just use the Gd148 to keep the craft warm and use other means to generate electrical power.
Gd148 is sexy as hell, but isn't exactly available in the corner drugstore. I quote:
A ~0.2 kg block of pure Gd148 (~1 inch^3) initially yields ~120 watts, sufficient in theory to meet the complete basal power needs of an entire human body for ~1 century...
Yes, I admit it.
I stopped using TurboTax when they decided they could write data outside my filesystem, as if it were their computer. I use H&R Block's TaxCut, and it's just as good as TurboTax ever was.
Cancer may not have to be the cause of death, but rather the cause of immortality.
Perhaps they can harness the same thing that keeps HeLa cells immortal - sort of a body-wide 'cancer' that makes you immortal?
Anything free is worth what you pay for it.
