We have what are called energy orbits, but one of the fundamental concepts of chemistry is that you can't move them!
Actually, you can move them, very slightly, by using powerful magnetic fields; depending on the spin-state of the electron (up or down) the energy of the orbit changes slightly. If I recall correctly, this is one way that magnetic fields are measured on the Sun; they use a high-resolution spectroscope and look for "splitting" of the spectral lines.
Claimer: Yes, I took basic QM. No, I don't remember very much of it.
This is high school chemistry! He's either a fraud or an idiot.
Definitely the former; an idiot wouldn't be able to do the confidence act so well.
This is just stupid. I hope that whoever wrote the slashdot headline for this one was being facetious when he offered up "ground-breaking science" as a valid option.
Agreed that it's stupid. On a site which touts itself as News for nerds, Stuff that Matters, it's disgusting to see it wasting space here.
On the other hand, if Roblimo loses some money in this guy's scam, maybe it would improve the editorial skepticism of Slashdot. --
I went through the claims on the web site, and here's my tally:
Lots of claims of "patents pending".
Not one single patent number.
Not one single reference to a scientific paper.
A plug for a (non-peer-reviewed, probably over-priced) book.
If it looks like a scam and it smells like a scam, it's almost certainly a scam. If this guy doesn't deliver on his promises RSN, I hope he spends the next five years in prison, and the twenty after that slaving to pay back the people he scammed. --
Science fiction author Vernor Vinge will be touring the USA and Canada over the next month to promote his new book, Marooned in Real-Time Linux.Set in the early 21st century, it follows several angst-ridden Windows programmers after Y2K bugs and the subsequent legal action have led to a post-Microsoft world.Their skills having been frozen by years on the upgrade treadmill, they emerge into a scene where they are anachronisms.Their varying fates work as a cautionary tale in this time of rapid technological advance.
Is there some sort of overhead or any other drawback that would make it non-optimal for simple desktop usage?
Overhead is one thing (guaranteeing that a task can get X% of the CPU with Y microseconds of latency requires more task switches). Another is that the desktop system probably wants to devote more CPU to the task that's got user focus. Yet another thing is that most RTOS's assume that all programs are well-behaved and will relinquish the CPU when they have nothing to do, allowing lower-priority tasks to run; in a desktop application environment this assumption is probably invalid for a large subset of systems. --
It'll be a while before this gets to the microwave and the fridge. You'll see it first in the electric meter, or whatever gateway gets involved with demand-side management. Maybe the air conditioner will wind up doing that part, but the utilities want to put that functionality into the meter to implement time-of-day and market pricing, demand-side management, and a host of other features they want to push from the commercial level down to household customers. --
The problem here is that you have the recieve and transmit on the same cable
This is typical for consumer-grade equipment.The T/R switch is built into the gear (why would you have it external, when your power amplifier and receiver front-end are right there?) and there is no provision for anything other than an antenna.
The original poster here didn't specify this, and might have meant that the recieve and transmit channels were taken seperately to the antenna(s).
Easy way to find out:go read the specs on the Wavelan card.;-)
The problem with that is noise and control. To keep from swamping your receiver with noise, you may have to bias your power amplifier off when not sending. Then your problem is to get the thing on quickly enough when it's time to transmit. If you can't get your amplifier re-biased and operating fast enough to get the packet preamble on the air (or worse, switch on abruptly and cause splatter) you'll have problems getting receivers to recognize your packets. Getting these things to work as a system can be a real hassle, and there are a lot of details that have to be just right. --
A cable driver is a lot less expensive than a PC... =)
Unfortunately, a remote power RF amplifier with receving preamplifier and automatic T/R switch isn't quite as simple, or as available, as a cable driver. --
I'm not sure why you need to put the computer out on the mast. Care to explain that (other than it being cheaper to have one case than two cases), danci?
My point: GHz RF has high losses in cables, but typical data rates have much more managable losses. If you can split the RF sections from the rest of the system, you can still put the electronics in a temperature-controlled environment while keeping the antenna cable short. (This assumes that the RF section will function under temperature extremes, which it may not. Test things in an environment chamber before you rely on them.)
I'm not familiar with Wavelan cards, but I'm going to make a guess here that they have both the digital and the RF sections on a single internal bus card and you don't have the option of splitting the system. In this case I would examine better transmission lines. One old technology I'm aware of is Goubeau line (I think that spelling is correct, Georg Goubeau is listed as being on the faculty at the University of Jena in Germany, specializing in the generation and propagation of EM waves). Goubeau line uses a pair of "launchers" to take a signal propagating on a coaxial cable and allow it to travel in the neighborhood of a bare wire; this nearly eliminates dielectric losses. While you'd need coax for any runs indoors, you could use Goubeau line to go from the outside wall wall to the top of your mast. I'd suggest using a flexible standoff/tensioner on the mast to keep the wire taut, and avoid the use of spacers. If you have a tower, I'd try running the line right up the middle.
Niggling issues like dealing with icing always rear their ugly heads. You may wish to design your antenna so that it is always at DC ground and have a big honking transformer to throw some low-voltage AC up and down your wire. This would let you melt ice and snow off it. If the Wavelan card provides signal-quality reporting you could even have your computer operate the heater as needed.
To be sure, Chaisson merely theorizes to that effect. He implies that the NASA officials overseeing the process were not allowed access to the spysat optical tech and were not, in a sense, qualified to check Perkin-Elmer's work.
Considering that Perkin-Elmer did two tests which are commonly performed by amateur telescope makers (the knife-edge test and the Foucault test), this explanation appears lame.
In contrast, the backup mirror contract was let to Kodak; after the problem with the P-E mirror was discovered after launch, Kodak's mirror was checked and found to be flawless.
This is incorrect; I just read that chapter. The Kodak mirror was delivered to P-E before they had finished their own mirror. The crate in which it arrived remained on the P-E premises (as of 1991's writing), but nobody could/would verify whether or not it still contained a mirror. It was rumored to have been recycled into a spysat. Chaisson believes that it was probably flawless, since Kodak used a more reliable (standard) process to make it.
My information about the Kodak mirror came from Jim Loudon, I think; it's hard to recall. However, I'll dispute the story about the processing of the mirror. Grinding mirrors isn't any secret. According to the account I read, a test device which incorporated an aperture with a mirror behind it (for the Foucault test) was supposed to be flat black, but an area on it was polished by the drill press when the hole was made. This extra reflecting area caused the mirror to read as being on-spec when it was actually focussing short. The knife-edge test revealed the problem, but P-E ignored the results because the Foucault test was "more accurate". It turned out to be more precise, but precision and accuracy are two different things. The mirror was built to focus dead-on to a point too close to the primary, nobody checked, and the rest is history.
The Hubble was also beset by requirements that they borrow tech from the military spysat side, but without classified knowledge about the limitations of that tech. The closed procurement process probably factored in the misshapen mirror.
It most certainly did. The mirror on the Hubble was built by Perkin-Elmer, in a plant devoted to spysats. NASA was not allowed access to the plant to verify the correct figuring of the mirror, and an error by P-E in the construction of the test gear caused it to be built to an incorrect focus. As a cost-saving measure, the entire Hubble was not checked for proper focus before launch (Perkin-Elmer was assumed to know what they were doing). In contrast, the backup mirror contract was let to Kodak; after the problem with the P-E mirror was discovered after launch, Kodak's mirror was checked and found to be flawless.
I guess "open-source" isn't just good for software, it's good for space projects too. -- The Karma Century Club is taking new members.
Back in the days of the unjustly-maligned Strategic Defense Initiative, there was a group of people who were charged with getting SDI satellites into orbit. They had advantages over NASA in this regard. They were tied to neither the existing launch-vehicle fleet nor the high-cost aerospace contractors; this let them examine things afresh. They took out a clean sheet of paper and tried to design, not a vehicle, but a program for getting a vehicle.
What they wound up with looked very different from the Space Scuttle and VultureStar. It was a squarish bullet, covered in thermal-blanket material originally developed for the Shuttle. It was not terribly fussy about its engines; it could have flown on J2's or RL-10's. The innovations were several:
It was designed to land tail first, under power. This takes advantage of the engines, which are along for the ride, to provide landing capabilities. This eliminates the need to be able to glide subsonically; the glideslope, flare and landing maneuver required by Shuttle (and VentureStar) is unnecessary.
It did not have wings. This saved a great deal of weight in the airframe.
Its landing gear was a system of struts and pads. No wheels required. This saved more weight.
The pilot went away also. When so many missions are just putting unmanned birds or cargo in orbit, why carry people along all the time?
The vehicle was to be called the Delta Clipper, or DC-1.
The development program was very innovative: build a little, fly the results, roll the lessons learned back into the next generation. The first vehicle (low-altitude atmospheric testing, designed to prove some of the required maneuvers for takeoff, landing and aborts) was the DC-X. The second-generation, subscale, orbital (with no payload) vehicle was to be the DC-Y; it would have tested fuel tankage, weight-saving and thermal-protection systems.
The total cost of DC-X and DC-Y was to be less than one year's budget for the Shuttle program.
SDIO borrowed stuff from everywhere to build DC-X. They got 4 RL-10's on loan from Rocketdyne, had the aeroshell built by Scaled Composites (Burt Rutan's outfit), and reprogrammed an airliner autopilot to fly the bird. DC-X was a phenomenal success, proving everything it was set out to do. And then SDIO, shutting down and getting outside of their bailiwick (which was NOT to develop commercial spacecraft launchers), turned the program and the prototype over to NASA.
NASA completed the scheduled test flights and then crashed and burned the prototype when someone neglected to reconnect a landing-gear unlock line before flight. Accident? Deliberate? No one's talking.
After the destruction of the DC-X, NASA let a contract for the development of a successor to the Shuttle. The developers of the DC-X had a bid in, but the contract was awarded to a company whose vehicle:
Had no development record;
Could not be delivered for many years longer;
Had a much more expensive development program.
On the other hand it took off vertically like Shuttle, landed on (and required) a runway like Shuttle, and required a new engine development program. The winner was not the low bidder. Can you say "more pork"?
When the winner of the contract was announced, the counsel for NASA was present. This was apparently to keep the DC-1 proponents from getting the idea of suing to either get the contract or find out what funny business had gone on. In the mean time, the Shuttle and its standing army of maintenance people are still working, and there's a lucrative R&D contract for the VentureStar (even though it's having serious difficulties with its composite LH2 tanks delaminating). It's great for everyone except the taxpayer and people who might benefit from flying satellites cheaper; IOW, it sucks. -- The Karma Century Club is taking new members.
IIRC, Rotary Rocket is not going to be able to engineer the rotary engine in time for their first launches, and are going to try to use a conventional engine.The last time I heard, the engine they were going to use would not let them get to orbit with a payload (or maybe not let them get to orbit at all).
I haven't checked their site in a while so I could easily be out of date. -- The Karma Century Club is taking new members.
BZZZT!Sorry, but thanks for playing.The biggest original purpose of the Hubble Space Telescope was to determine the value of the Hubble Constant by calculating the luminosity of Cepheid variable stars in galaxies too distant for ground-based telescopes to perform the work.Extra-solar planets cannot be reliably detected by their reflected light at this time (only one freakish case has allowed this), and Hubble has not been involved in the detection of these planets; it has been done with ground-based telescopes collecting extremely precise spectrometry data. -- The Karma Century Club is taking new members.
Although it is frustrating; you spend a little time with your tongue in your cheek, and 4 moderators kick you up. Then you spend an hour checking facts to correct someone's posted misconception, and you get no moderator action, and no responses. It looks like the social tendency is for Slashdot to turn into rec.humor. --
Biologists working in unregulated laboratories south of the border have long been experimenting with techniques and materials forbidden in the United States for ethical or political reasons. Fetal-cell transplants for treatment of Parkinson's disease has been impossible to obtain in the US, but is commonly practiced here. Now forbidden science threatens to overshadow forbidden medicine.
At a press conference in Mexico City, Dr. Xavier Cojones announced a breakthrough in cross-species gestation. "Other scientists have managed to bring the offspring of one species to term in the womb of another, but my team has successfully fertilized a hybrid of two species and gestated it inside a third. As these species never mate naturally, this is truly unprecedented."
According to the press release, Cojones and his team have crossed the Common Geek (Bitfiddleus Obsessivus) with a Trial Lawyer (Ambulancus Chaserium) and gestated the resulting embryo in an Education Major (Lowtestscorus Unemployablus). Despite their outward similarity no cross between any of these is known to have occurred; in nature, these species badmouth, snub, or sue each other to death nearly every time they meet.
The key breakthrough was in the collection and handling of the gametes and embryo. Cojones and his team claim to have achieved heretofore-unseen success in gestation of such crosses. "Our big advance was in thinking to try using an Education Major as the host-mother. The current conditions for their species are very grim, and evolution has primed their systems to be very receptive to any chance to be involved with juveniles," Cojones said. "Given the proper opportunity, embryos take very well and thrive."
Asked about the gamete donors, Cojones explained "The key is to find good specimens of each species in their natural habitat and at the peak of their natural cycle. While it is often difficult to tell when a Geek is fertile, we found that it was not at all difficult to obtain sperm from them. Under the influence of a Quake and Corona hangover, many of them will leave perfectly good samples the next morning. Linux Installfests are particular good hunting grounds for this sort of thing. Getting ova from the Lawyer was done by offering the chance to be a plaintiff in a class-action suit against private adoption agencies. This urge of lawyers to eat their own does have its scientific uses."
The last question of the press conference was about future challenges for the team. Cojones replied, "We are going to revisit some of our failures and see if we can't learn something from them. For two years we attempted to cross a Geek with a rat, without success. We finally had to turn to lawyers for ova, because there are some things even a rat won't do."
Copyright (c) 1999 United Perversion International. All rights reversed. --
You haven't studied biology. Your fundamental premise is that the pregnant mammal has no immune reaction against the cells of the fetus. You ignore a lot of inconvenient facts to the contrary:
Mothers cannot take transplants from their children without risking rejection like everyone else.
Reactions against some fetal tissues in utero do occur, and can kill the fetus before or shortly after birth; RH-incompatibility is one of them (RH-negative mother gives birth to an RH-positive child, gets some mixing of blood during birth, develops antibodies to RH-positive blood cells, future RH-positive foetii develop anemia due to immune attack and do not survive).
There's a biochemical jiu-jitsu that the fetus plays with the host's immune system, otherwise none of us would have lived long enough to be born. As long as two species are similar enough at the molecular level for this well-refined scheme to function correctly, immune rejection of the fetus should not be a show-stopper. --
There are content restrictions on what you can send over ham radio. No encrypted data, no profanity, no nothing.
Your range isn't much better than line-of-sight on any band where you can get serious bandwidth. On the HF bands which do allow DX regularly, IIRC you are limited to very low speeds; it used to be 65 WPM Baudot (!), but it may be as high (yeah, high) as 4800 BPS now. You just don't have the bandwidth to play with when your entire band is only 300 KHz wide; you have to play nice and share, or else you aren't operating for long.
You can't do anything at all commercial.
Anyone can listen to your traffic.
Ham radio, especially in the HF bands, just isn't suited for what you need for wearables. --
I tried following the link and got a message saying that the item was not found on the server. If this is not just a transient problem, please post the correct URL as a follow-up to me (I will be checking back). Thanks. --
And thus eliminate one of the natural imunities to malaria.
Obviously you cannot read, because if you could you would have realized that the only thing my scheme would prevent is two heterozygotes having a homozygote offspring. This would allow the heterozygotes to take full advantage of their resistance to malaria without having the burden of bearing and raising children afflicted by sickle-cell anemia. Far from eliminating a natural immunity, it would allow the entire population to have one such gene without having to worry about their kids. --
Slashdot Mirror
Claimer: Yes, I took basic QM. No, I don't remember very much of it.
Definitely the former; an idiot wouldn't be able to do the confidence act so well. Agreed that it's stupid. On a site which touts itself as News for nerds, Stuff that Matters, it's disgusting to see it wasting space here.On the other hand, if Roblimo loses some money in this guy's scam, maybe it would improve the editorial skepticism of Slashdot.
--
- Lots of claims of "patents pending".
- Not one single patent number.
- Not one single reference to a scientific paper.
- A plug for a (non-peer-reviewed, probably over-priced) book.
If it looks like a scam and it smells like a scam, it's almost certainly a scam. If this guy doesn't deliver on his promises RSN, I hope he spends the next five years in prison, and the twenty after that slaving to pay back the people he scammed.--
Pick this one up at NoBrain.
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It'll be a while before this gets to the microwave and the fridge. You'll see it first in the electric meter, or whatever gateway gets involved with demand-side management. Maybe the air conditioner will wind up doing that part, but the utilities want to put that functionality into the meter to implement time-of-day and market pricing, demand-side management, and a host of other features they want to push from the commercial level down to household customers.
--
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Sprinkling your postings with those question-marks-indicating-incompatibility is no way to go through life!
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The problem with that is noise and control. To keep from swamping your receiver with noise, you may have to bias your power amplifier off when not sending. Then your problem is to get the thing on quickly enough when it's time to transmit. If you can't get your amplifier re-biased and operating fast enough to get the packet preamble on the air (or worse, switch on abruptly and cause splatter) you'll have problems getting receivers to recognize your packets. Getting these things to work as a system can be a real hassle, and there are a lot of details that have to be just right.
--
That's because he mis-spelled it. Think Michael Faraday, as in the guy after whom the farad is named.
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--
My point: GHz RF has high losses in cables, but typical data rates have much more managable losses. If you can split the RF sections from the rest of the system, you can still put the electronics in a temperature-controlled environment while keeping the antenna cable short. (This assumes that the RF section will function under temperature extremes, which it may not. Test things in an environment chamber before you rely on them.)
I'm not familiar with Wavelan cards, but I'm going to make a guess here that they have both the digital and the RF sections on a single internal bus card and you don't have the option of splitting the system. In this case I would examine better transmission lines. One old technology I'm aware of is Goubeau line (I think that spelling is correct, Georg Goubeau is listed as being on the faculty at the University of Jena in Germany, specializing in the generation and propagation of EM waves). Goubeau line uses a pair of "launchers" to take a signal propagating on a coaxial cable and allow it to travel in the neighborhood of a bare wire; this nearly eliminates dielectric losses. While you'd need coax for any runs indoors, you could use Goubeau line to go from the outside wall wall to the top of your mast. I'd suggest using a flexible standoff/tensioner on the mast to keep the wire taut, and avoid the use of spacers. If you have a tower, I'd try running the line right up the middle.
Niggling issues like dealing with icing always rear their ugly heads. You may wish to design your antenna so that it is always at DC ground and have a big honking transformer to throw some low-voltage AC up and down your wire. This would let you melt ice and snow off it. If the Wavelan card provides signal-quality reporting you could even have your computer operate the heater as needed.
--
--
The Karma Century Club is taking new members.
I guess "open-source" isn't just good for software, it's good for space projects too.
--
The Karma Century Club is taking new members.
What they wound up with looked very different from the Space Scuttle and VultureStar. It was a squarish bullet, covered in thermal-blanket material originally developed for the Shuttle. It was not terribly fussy about its engines; it could have flown on J2's or RL-10's. The innovations were several:
- It was designed to land tail first, under power. This takes advantage of the engines, which are along for the ride, to provide landing capabilities. This eliminates the need to be able to glide subsonically; the glideslope, flare and landing maneuver required by Shuttle (and VentureStar) is unnecessary.
- It did not have wings. This saved a great deal of weight in the airframe.
- Its landing gear was a system of struts and pads. No wheels required. This saved more weight.
- The pilot went away also. When so many missions are just putting unmanned birds or cargo in orbit, why carry people along all the time?
The vehicle was to be called the Delta Clipper, or DC-1.The development program was very innovative: build a little, fly the results, roll the lessons learned back into the next generation. The first vehicle (low-altitude atmospheric testing, designed to prove some of the required maneuvers for takeoff, landing and aborts) was the DC-X. The second-generation, subscale, orbital (with no payload) vehicle was to be the DC-Y; it would have tested fuel tankage, weight-saving and thermal-protection systems.
The total cost of DC-X and DC-Y was to be less than one year's budget for the Shuttle program.
SDIO borrowed stuff from everywhere to build DC-X. They got 4 RL-10's on loan from Rocketdyne, had the aeroshell built by Scaled Composites (Burt Rutan's outfit), and reprogrammed an airliner autopilot to fly the bird. DC-X was a phenomenal success, proving everything it was set out to do. And then SDIO, shutting down and getting outside of their bailiwick (which was NOT to develop commercial spacecraft launchers), turned the program and the prototype over to NASA.
NASA completed the scheduled test flights and then crashed and burned the prototype when someone neglected to reconnect a landing-gear unlock line before flight. Accident? Deliberate? No one's talking.
After the destruction of the DC-X, NASA let a contract for the development of a successor to the Shuttle. The developers of the DC-X had a bid in, but the contract was awarded to a company whose vehicle:
- Had no development record;
- Could not be delivered for many years longer;
- Had a much more expensive development program.
On the other hand it took off vertically like Shuttle, landed on (and required) a runway like Shuttle, and required a new engine development program. The winner was not the low bidder. Can you say "more pork"?When the winner of the contract was announced, the counsel for NASA was present. This was apparently to keep the DC-1 proponents from getting the idea of suing to either get the contract or find out what funny business had gone on. In the mean time, the Shuttle and its standing army of maintenance people are still working, and there's a lucrative R&D contract for the VentureStar (even though it's having serious difficulties with its composite LH2 tanks delaminating). It's great for everyone except the taxpayer and people who might benefit from flying satellites cheaper; IOW, it sucks.
--
The Karma Century Club is taking new members.
I haven't checked their site in a while so I could easily be out of date.
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The Karma Century Club is taking new members.
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The Karma Century Club is taking new members.
Someone please give this an "informative" or two.
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The Karma Century Club is taking new members.
Although it is frustrating; you spend a little time with your tongue in your cheek, and 4 moderators kick you up. Then you spend an hour checking facts to correct someone's posted misconception, and you get no moderator action, and no responses. It looks like the social tendency is for Slashdot to turn into rec.humor.
--
Entertaining thought: 1 out of 4 moderators; 1 out of 5 Americans. Americans are doing pretty well by comparison. ;-)
--
Biologists working in unregulated laboratories south of the border have long been experimenting with techniques and materials forbidden in the United States for ethical or political reasons. Fetal-cell transplants for treatment of Parkinson's disease has been impossible to obtain in the US, but is commonly practiced here. Now forbidden science threatens to overshadow forbidden medicine.
At a press conference in Mexico City, Dr. Xavier Cojones announced a breakthrough in cross-species gestation. "Other scientists have managed to bring the offspring of one species to term in the womb of another, but my team has successfully fertilized a hybrid of two species and gestated it inside a third. As these species never mate naturally, this is truly unprecedented."
According to the press release, Cojones and his team have crossed the Common Geek (Bitfiddleus Obsessivus) with a Trial Lawyer (Ambulancus Chaserium) and gestated the resulting embryo in an Education Major (Lowtestscorus Unemployablus). Despite their outward similarity no cross between any of these is known to have occurred; in nature, these species badmouth, snub, or sue each other to death nearly every time they meet.
The key breakthrough was in the collection and handling of the gametes and embryo. Cojones and his team claim to have achieved heretofore-unseen success in gestation of such crosses. "Our big advance was in thinking to try using an Education Major as the host-mother. The current conditions for their species are very grim, and evolution has primed their systems to be very receptive to any chance to be involved with juveniles," Cojones said. "Given the proper opportunity, embryos take very well and thrive."
Asked about the gamete donors, Cojones explained "The key is to find good specimens of each species in their natural habitat and at the peak of their natural cycle. While it is often difficult to tell when a Geek is fertile, we found that it was not at all difficult to obtain sperm from them. Under the influence of a Quake and Corona hangover, many of them will leave perfectly good samples the next morning. Linux Installfests are particular good hunting grounds for this sort of thing. Getting ova from the Lawyer was done by offering the chance to be a plaintiff in a class-action suit against private adoption agencies. This urge of lawyers to eat their own does have its scientific uses."
The last question of the press conference was about future challenges for the team. Cojones replied, "We are going to revisit some of our failures and see if we can't learn something from them. For two years we attempted to cross a Geek with a rat, without success. We finally had to turn to lawyers for ova, because there are some things even a rat won't do."
Copyright (c) 1999 United Perversion International. All rights reversed.
--
- Mothers cannot take transplants from their children without risking rejection like everyone else.
- Reactions against some fetal tissues in utero do occur, and can kill the fetus before or shortly after birth; RH-incompatibility is one of them (RH-negative mother gives birth to an RH-positive child, gets some mixing of blood during birth, develops antibodies to RH-positive blood cells, future RH-positive foetii develop anemia due to immune attack and do not survive).
There's a biochemical jiu-jitsu that the fetus plays with the host's immune system, otherwise none of us would have lived long enough to be born. As long as two species are similar enough at the molecular level for this well-refined scheme to function correctly, immune rejection of the fetus should not be a show-stopper.--
- There are content restrictions on what you can send over ham radio. No encrypted data, no profanity, no nothing.
- Your range isn't much better than line-of-sight on any band where you can get serious bandwidth. On the HF bands which do allow DX regularly, IIRC you are limited to very low speeds; it used to be 65 WPM Baudot (!), but it may be as high (yeah, high) as 4800 BPS now. You just don't have the bandwidth to play with when your entire band is only 300 KHz wide; you have to play nice and share, or else you aren't operating for long.
- You can't do anything at all commercial.
- Anyone can listen to your traffic.
Ham radio, especially in the HF bands, just isn't suited for what you need for wearables.--
I tried following the link and got a message saying that the item was not found on the server. If this is not just a transient problem, please post the correct URL as a follow-up to me (I will be checking back). Thanks.
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