h a l f b a k e r yLoading tagline ....
add, search, annotate, link, view, overview, recent, by name, random
news, help, about, links, report a problem
browse anonymously,
or get an account
and write.
register,
|
|
|
Please log in.
Before you can vote, you need to register.
Please log in or create an account.
|
Seeing I'm on a plane in a few days (drones
permitting) all the passengers will all get a smallish
touch of the old radiation.
Und zo I propose x-ray plates fitted on the seats, or
one huge roll of film that fits around the (inner)
circumference of the plane, which is hoicked out
when the
plane lands, by a radiologist.
For more accuracy, the plates are shielded until the
plane is going on a predictable, straight line course,
then shielded again on getting to the fiddly bits of
the flight.
For night-flights, a phosphorous compound should
be mixed in, so the film will be able to see the x-
rays.
Not even wrong
https://rationalwik...wiki/Not_even_wrong
Mentioned in my anno. I don't think this idea *is* this, but it's at least *almost* this. [notexactly, Jan 27 2019]
X-rays from Sellotape
https://www.youtube...watch?v=LQBjRF9mX1Y
[MaxwellBuchanan, Jan 27 2019]
BED: Banana Equivalent Dose
https://en.wikipedi...ana_equivalent_dose
[hippo, Jan 31 2019]
Depleted uranium counterweights used on 747's
https://aviation.st...rweights-in-the-747
DU is mostly safe. Mostly. Just don't lick or touch it. [RayfordSteele, Jan 31 2019]
[link]
|
| |
The creation of an idea that has so many faults, misconceptions and downright foolishness in it of itself bespeaks some sort of extraordinary talent. |
|
| |
Just not one of any value or use. |
|
| |
Aha, so I am outstanding in one respect. |
|
| |
In theory, there should be no need for X-ray plates - just
install sufficiently sensitive accelerometers in a few points
around the aircraft. |
|
| |
Every person's body mass will affect the way the plane
responds to micro-turbulence or even to the faint vibrations
of the engines. Equally, density variations within each of
the bodies should likewise have an effect. Therefore, with
a set of ultra-sensitive accelerometers, it should be possible
to recover images as accurate and as three-dimensional as a
CT scan. |
|
| |
Admittedly, the computation will be tricky. Although you
might in theory be able to use a data-driven approach to
compute 3D passenger images from the accelerometer data,
I don't think we can handle it with current mathematics.
So, you'd have to go for a model-driven approach. Divide
the plane (and its enclosed space, including passengers)
into 100µm voxels, and then model all possible densities
and compliances for each possible voxel, to find the model
that most closely fits the accelerometer data. A priori,
you'll have something like 10^17 voxels, modelled with (say)
100 different densities and 100 different compliances,
meaning that there will be (10^4)^(10^17) models to
evaluate. However, you know what the aircraft is made of
(mostly), and you know that some places will contain only
air, so you can probably cut that number down
considerably. |
|
| |
The idea itself is almost not even wrong: [link] |
|
| |
// Every person's body mass will affect the way the plane responds to
micro-
turbulence or even to the faint vibrations of the engines. Equally,
density variations
within each of the bodies should likewise have an effect. Therefore,
with a set of
ultra-sensitive accelerometers, it should be possible to recover images
as accurate
and as three-dimensional as a CT scan. // |
|
| |
Sounds like a hybrid inertia/gravity camera. I was thinking about how
to build a
gravity camera about a year ago, or about two years ago, though
certainly not about a year and a half ago. Maybe I should post it when I
remember the details
of my design. |
|
| |
OK. {Clambers gingerly into the shallow end} |
|
| |
We're imagining some sort of background radiation,
supposed to be present in higher doses at altitude? |
|
| |
(The alternative, which I'm setting aside for now, is that
we're imagining radiation emanating from some part of
[not_morrison_rm]'s own body, for the illumination of
his/her fellow-passengers). |
|
| |
And then, we're assuming that it arrives vertically from
above the aircraft? |
|
| |
In which case, we imagine, it might leave on the film or
plate a radiological equivalent of one of those "sitting on a
photocopier" pictures from an office Christmas party? |
|
| |
Is that how it works in your imagination, [not], or should I
start again from somewhere else? |
|
| |
Would anyone like some of these question marks ?????? |
|
| |
This idea could totally work -- all you need to do is add a nice big lead collimator to the top of the plane, lead shielding everywhere else, and make sure nobody moves or breathes for the duration of the flight. |
|
| |
// we're assuming that it arrives vertically from above the aircraft? // |
|
| |
Yes; sadly, that assumption is entirely incorrect. |
|
| |
// we're assuming that it arrives vertically from above
the aircraft? // |
|
| |
Surely it's not beyond the wit of man to have one wing
down a bit? |
|
| |
Did I mention the on-board proctologist? Easily
identified by the very long latex gloves with suspicious
stains. |
|
| |
//all you need to do is add a nice big lead collimator// Why
a collimator? If they're solar X-rays, they're already
effectively parallel beams. |
|
| |
Yes, but emulsion films aren't that discriminating, and there's a substantial amount of other energetic E-M radiation at altitude that will fog plates; it isn't truly isotropic, but there's enough "off-axis" flux to defocus an exposed plate. |
|
| |
NASA have a lot of info on their website about high altitude and LEO radiation levels. |
|
| |
// Easily identified by the very long latex gloves with suspicious stains. // |
|
| |
Might not be a proctologist - could just as easily be a tax inspector ... |
|
| |
Maybe we're thinking about this upside down. Relying on
solar X-rays from above is fraught with difficult difficulties. |
|
| |
However, considerable amounts of X-rays can be generated
by peeling Sellotape from a reel <link>. I suggest,
therefore, that we proceed as follows. First, we replace
the nose-wheel tyres of the plane with big rolls of
Sellotape, complete with that little non-stuck tab that you
use to start the roll. Then, we employ a guy whose job it is
to run in behind the nose-wheels immediately before take-
off, and stand on that little tab. Obviously he should
crouch down a little. Then, the take-off proceeds as usual,
with the Sellotape peeling off the wheels as the plane
moves, generating X-rays. |
|
| |
The X-ray plates will be placed above, rather than below
the passengers. Only four or five seats over the nose-
wheels will be usefully irradiated, but these will be in
either First or Business, and occupants of those seats will
pay a premium for being X-rayed. |
|
| |
Good idea -- sell it as an "anti-terrorism" in-flight
whole-body scanner and it'll be made mandatory for
all commercial aircraft. |
|
| |
// occupants of those seats will pay a premium for being X-rayed. // |
|
| |
You could call it "Eben Byers Class" ... |
|
| |
This idea is probably at least as feasible as my
BED*-based X-ray camera, which works by wrapping yourself in X-ray film and eating a banana.
[* BED: A unit of radiation, roughly equivalent to the radiation level of an average-sized banana (see link)] |
|
| |
//Seeing I'm on a plane in a few days all the passengers will all get a smallish touch of the old radiation.// |
|
| |
[8th] lent you his pocket cyclotron ? I'm not going to ask why you plan on irradiating the other passengers, that being obvious, but how are you going to explain it to the TSA ? |
|
| |
People tend to move around on aircraft, shifting, shuffling
and nipping off to the toilet. To get any reasonable image,
you'd have to remove the toilets, then clamp the passengers
in so tightly that only the most shallow breathing is
possible... wait, I think they're already implementing that... |
|
| |
//People tend to move around on aircraft, shifting,
shuffling and nipping off to the toilet. |
|
| |
Not on Ryanair, no room to move. I blighted the fair
city of Malaga with my presence. |
|
| |
// considerable amounts of X-rays can be generated by
peeling Sellotape from a reel // |
|
| |
Only in a partial vacuum, IIRC. Good luck building a vacuum
chamber big enough for a plane to take off in. There are at
least two other obvious difficulties as well. |
|
| |
Yes; the runway will have to be cleared of used tape after each takeoff, and the change in wheel diameter will seriously affect the calibration of the autobrake/ABS on landing. |
|
| |
// how are you going to explain it to the TSA ? // |
|
| |
It's cunningly disguised as a Colt M1911A1 .45 semi-automatic pistol. |
|
| |
Make that four other obvious difficulties… |
|
| |
Everyone's a critic ... like you could do better ... |
|
| |