A door or window is much bigger than the cellphone wavelength, the best you can expect is some attenuation
It doesn't always take a lot of attenuation to stop a cell phone signal. If the tower is on the other side from the door, the loss would be too big for any cell phone I've used. I often use a cell phone in a stone building. It helps to stay close to the windows on the correct side, even though the windows are quite large.
Sure, I could get a better antenna, but pointing the thing is such a pain.:-)
See, the people traveling are a captive audience, if they want to fly, they have to show up, and unless you live in an area with multiple large airports you're stuck with that airport
I often choose a flights based on the airport where I change planes. Chicago - never again. Salt Lake - great. If I knew an airport had free wi-fi, I would be willing to spend an extra 15 minutes more flight time to stop there instead.
I can't really say if you are crazy or not. Feel free to think I am.
Audiophiles don't all agree about tubes vs solid state. Some say that tube amps only sound better because they are more expensive than soild state amps. Often they use a different class of design in high end amps. Class A instead of AB I think. These people tell me that high priced solid state amps sound just as good as tube amps in the same price range. My cheap solid state amp receiver just fine to me, so I wouldn't know first hand.
I work with high power tube amps for RF. For really big power, they are the only thing you can get. They also work better in pulsed systems (like radars), because they do a better job of averaging out the heat load. At least, that's why our RF engineer tell me. I'm the computer guy.
The mental map between "Big hand on 2 and little hand on 6" to 2:30 is non-trivial... I mean, did you catch that that time is actually ten minutes after six?
I guess that's why no one reads analog watches out loud like that.
Try this: The first digit is dark, the second digit has segments a, b, g, e, and d lit. The double dots are lit. The third digit has segments a, b, g, c, and d lit. The forth digit has segments a, b, c, d, e, and f lit.
I think you get my point. While I agree that an analog watch is harder to learn to read, your example doesn't show anything.
Personally, I find analog watches much faster to read. I suspect it has to do with my dyslexia. I always buy "dual" watches, since I like to have an alarm.
The only way to protect yourself is to not give out your address.
Even that's not good enough. You have to make the name unguessable too. It doesn't have to be as bad as a password, but I've had unused accounts get spam.
Ok, I'm a huge nethack fan. I'd probably be rich by now if nethack never existed.
Still, I have to say, while this comment is quite funny it is not insightful. First of all, the `wc -w` thing has been done to death, please mod it down. Second, the guy asking the question bought a Mac. He don't want to even touch his keyboard or use a second mouse button.
Of course dB is 20log10, not 10log10 as I said. Maybe that's what the AC wrote. I don't read AC responses anymore. Using the right formula, 24 bits is over 140 dB of dynamic range, which "should be plenty".
32 bits is only 10 log10(2^32) or 96 dB. Human hearing can works in a range of 120 dB. Of course that goes from hardly noticed sounds to hearing damage. From what I can tell, hearing damage is pretty popular with the kids I hear driving home from high school.
If you expect to basically start with all the power of your Linux box, you'll be sorely dissappointed.
While I stronly expect you are right that this isn't the most polished package, it's funny you picked slow grep as an example. A few months back a user told me grep was acting really slow. I was able to confirm that grep was almost 100x slower on recent RedHat installs. Turns out the bug had to do with Unicode and was easily fixed by turning it off. Nobody's perfect.
Well, for starters, it's really hard to fake a GPS constellation.
It's not that hard. You can buy GPS simulators off the self. I've seen them in Ashtech catalogs. You can buy high gain amps and antennas that way too (of course). I could build an override system for under half a million, easy, but I wouldn't even for the "good guys".
I'm not sure how you would setup and test the override. That would be harder, since you'd need to know the aircraft's true position real time, so you could "lie" to it just right.
Anyone capable of such a feat could more easily compromise the avionics and fly the plane themselves.
I can't do either of those. My skills are with RADAR and GPS processing.
Sure I'd rather see open source programs used. I'm sick of pkzip playing games with the format. This isn't the first time.
Gzip isn't enough. Pkzip is a zipper and an archiver, so you need another program like tar. I guess if you or I cared enough we could write a perty windows app that handles.tgz files as well as pkzip handles zips.
I love QNX, but I've never understood why they wont write a swapper for it. Maybe they have in the last few years, I haven't kept up. They had an almost religious statement that QNX should never be a desktop system, so that's why it shouldn't swap.
It would be so nice to see the real time priority system they use applied to a swap server process.
The version 5.0 of the ReplayTV software has exactly what you want. It is possible to flip the way Comercial Advance works. Normally CA automatically skips commercials, but it can be set to only skip the "filler".
I'm not sure I've got the pattern right, check AVS forum for the exact pattern. Play/Pause, slow, slow, slow, CA.
You don't know the first thing about antennas and you tell me to "think before posting". "Think before posting" has nothing to do with my arguments. I wasn't even arguing something, just stating a fact. You seem to believe you can "think" up facts. You can't. Your super mini coil antenna doesn't exist.
There's nothing in your article about antenna size. Go back a reread some of the older RFID articles. Look at what they say about antennas. Make sure you read closely, because the marketing and PR people always talk about size without antennas, then the reporters change the wording slightly confusing the issue.
There's a lot of BS about this size of these things. That last line of the article says, "The law of unintended consequences is about to encounter surveillance devices smaller than the period at the end of this sentence."
They tags may someday be that small (doubt it), but they will always need an antenna. Currently 1/2" is about the smallest realistic antenna. If you want to use radio waves, you're limited by physics (ok, you're always limited by physics).
It's a great strategy. Now when I search for certain items on google, I get hundreds of hits for stuff I can buy from amazon.com. It's pretty hard to find items from anyone else. Of course amazon didn't carry the item I was looking for anymore, but these fly-by-night amazon affiliates don't always stay up to date.
The current mail system sucks. It's doesn't use end-to-end anything. What little authentication it has isn't even end-to-end. I'm sure you know there isn't even link encryption. People send pop passwords in the clear. Crazy!
Thankfully https is end-to-end. We need more protocols like it.
Someday the world will figure it out and everything will be end-to-end encrypted. I'll carry my own encryption device and I will be able to use any unsecured network I want. Maybe before I die . . .
Slashdot Mirror
It doesn't always take a lot of attenuation to stop a cell phone signal. If the tower is on the other side from the door, the loss would be too big for any cell phone I've used. I often use a cell phone in a stone building. It helps to stay close to the windows on the correct side, even though the windows are quite large.
Sure, I could get a better antenna, but pointing the thing is such a pain. :-)
I often choose a flights based on the airport where I change planes. Chicago - never again. Salt Lake - great. If I knew an airport had free wi-fi, I would be willing to spend an extra 15 minutes more flight time to stop there instead.
Audiophiles don't all agree about tubes vs solid state. Some say that tube amps only sound better because they are more expensive than soild state amps. Often they use a different class of design in high end amps. Class A instead of AB I think. These people tell me that high priced solid state amps sound just as good as tube amps in the same price range. My cheap solid state amp receiver just fine to me, so I wouldn't know first hand.
I work with high power tube amps for RF. For really big power, they are the only thing you can get. They also work better in pulsed systems (like radars), because they do a better job of averaging out the heat load. At least, that's why our RF engineer tell me. I'm the computer guy.
I guess that's why no one reads analog watches out loud like that.
Try this: The first digit is dark, the second digit has segments a, b, g, e, and d lit. The double dots are lit. The third digit has segments a, b, g, c, and d lit. The forth digit has segments a, b, c, d, e, and f lit.
I think you get my point. While I agree that an analog watch is harder to learn to read, your example doesn't show anything.
Personally, I find analog watches much faster to read. I suspect it has to do with my dyslexia. I always buy "dual" watches, since I like to have an alarm.
Even that's not good enough. You have to make the name unguessable too. It doesn't have to be as bad as a password, but I've had unused accounts get spam.
It's still in the budget the white house just released. Of course he still has most of the cost increases planned for after he leaves office.
Still, I have to say, while this comment is quite funny it is not insightful. First of all, the `wc -w` thing has been done to death, please mod it down. Second, the guy asking the question bought a Mac. He don't want to even touch his keyboard or use a second mouse button.
Assimilation is like mergers. Who is doing and to whom it's being done isn't really that clear. As long as GPL code is spreading, I'm happy.
Of course dB is 20log10, not 10log10 as I said. Maybe that's what the AC wrote. I don't read AC responses anymore. Using the right formula, 24 bits is over 140 dB of dynamic range, which "should be plenty".
32 bits is only 10 log10(2^32) or 96 dB. Human hearing can works in a range of 120 dB. Of course that goes from hardly noticed sounds to hearing damage. From what I can tell, hearing damage is pretty popular with the kids I hear driving home from high school.
While I stronly expect you are right that this isn't the most polished package, it's funny you picked slow grep as an example. A few months back a user told me grep was acting really slow. I was able to confirm that grep was almost 100x slower on recent RedHat installs. Turns out the bug had to do with Unicode and was easily fixed by turning it off. Nobody's perfect.
It's not that hard. You can buy GPS simulators off the self. I've seen them in Ashtech catalogs. You can buy high gain amps and antennas that way too (of course). I could build an override system for under half a million, easy, but I wouldn't even for the "good guys".
I'm not sure how you would setup and test the override. That would be harder, since you'd need to know the aircraft's true position real time, so you could "lie" to it just right.
Anyone capable of such a feat could more easily compromise the avionics and fly the plane themselves.
I can't do either of those. My skills are with RADAR and GPS processing.
My local blood bank also gives preference to recent donors.
Gzip isn't enough. Pkzip is a zipper and an archiver, so you need another program like tar. I guess if you or I cared enough we could write a perty windows app that handles .tgz files as well as pkzip handles zips.
Yes, were I live it's "perty".
Right here.
It would be so nice to see the real time priority system they use applied to a swap server process.
"memory's cheap"
Most people find it hard to get excited that about states of matter that only exist for very short periods of time.
I'm not sure I've got the pattern right, check AVS forum for the exact pattern. Play/Pause, slow, slow, slow, CA.
There's nothing in your article about antenna size. Go back a reread some of the older RFID articles. Look at what they say about antennas. Make sure you read closely, because the marketing and PR people always talk about size without antennas, then the reporters change the wording slightly confusing the issue.
Bye.
I'm not going to argue with you. It's clear you don't know anything about antennas and would rather insult me than learn anything.
They tags may someday be that small (doubt it), but they will always need an antenna. Currently 1/2" is about the smallest realistic antenna. If you want to use radio waves, you're limited by physics (ok, you're always limited by physics).
It's a great strategy. Now when I search for certain items on google, I get hundreds of hits for stuff I can buy from amazon.com. It's pretty hard to find items from anyone else. Of course amazon didn't carry the item I was looking for anymore, but these fly-by-night amazon affiliates don't always stay up to date.
Thankfully https is end-to-end. We need more protocols like it.
Someday the world will figure it out and everything will be end-to-end encrypted. I'll carry my own encryption device and I will be able to use any unsecured network I want. Maybe before I die . . .
I'm not sure how that fits with your statemnt, since I'm not sure what you mean by handled.