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How Full-Body Scanners Work – and Fail

24 March 2012 (Original: 2010-11-16) | Source | Permalink | comments: 2
By Hans

Categories: [ Full Body Scanners ]

TSA has been introducing full-body scanners to perform a virtual strip search of air travelers. Although technically travelers have the right to opt out, the TSA discourages this behavior with aggressive and invasive pat-down searches. Initially, TSA denied punitive pat-down searches. Then they acknowledged testing a “more aggressive pat-down technique.” TSA began a more widespread implementation of this tactic at the beginning of November, and TSA agents have reportedly been quite open about that fact that the “enhanced” pat-down searches are specifically aimed to be so offensive as to coerce passengers into the scanners. In a blog post otherwise bluntly supportive of full-body scanning (the title, “Shut Up And Get In The Scanner,” gives a good idea of the tone of the writing), one former TSA screener writes:

It is a terror tactic by TSA to get you to walk through the more thorough body scanner.  I can’t defend TSA on this one.  I have talked to the TSA officers and it is no more effective than the old pat down procedure.  They tested it out with trainers and each other.  It is purely a terror tactic by TSA.

Other bloggers (with sharper tongues and stronger stomachs than I) have exhaustively documented the steaming mass of epic fail that is the TSA’s new policy. The aim of this post is to explain how full-body scanners work – and fail.

There are two kinds of full-body scanners: those based on backscatter X-ray technology and those based on millimeter wave technology.

Article Continues »

Comments

Ppc account manager Hamano Tenhoff is addicted to evil eye beads workout routines and train collecting. Lastly she is is getting most her encouragement from chilling together with her family.

By murano glass pendants on 2012 04 24 - 12:48:27

PLEASE sign the petitions against this disgusting draconian and ILLEGAL mandate - and forward to ALL who you know!

http://www.change.org/petitions/anthony-albanese-stop-rollout-of-cancer-causing-airport-body-scanning-machines-in-australia


http://http://www.gopetition.com/petitions/stop-the-implementation-of-body-scanners-in-australian.html

Only your signature can effect change.

By Biggest Brotherest on 2012 06 06 - 11:32:54

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Hey bubba luggs,

sit on it and spin.

Alex Jones had his day… He is OK to check out on every time something big happens to get a ‘conspiracy’ perspective, but 80% of his content is made up drivel. 15% is interesting and about 5% actually true.

No one in Australia is doing as gooder job as Heraward

NO ONE

By ROKBEBOP on 2014 07 22 - 00:20:35
From the entry 'Dissecting doublethink on the Israel/Gaza conflict'.

What a Disgrace all these Zionists and Freemasons liars here trying to deny chemtrails ,Hey Clowns your game is up no matter how much you lie we know the truth ,you ‘Persons’ are blatant liars and also traitors . The only ignorants are the ones that believe your disgusting lies The ADF are traitors and liars , Chemtrails and Geo-Engineering are 100% real the Government of Australia the commonwealth of Australia are total frauds and operate with ‘No Basis In Law” when will the dumbed down aussies wake up that even Fluoride is Poison ,let alone the Toxic filth that is loaded into drums inside the plane where seats would normally be ,and then via a sophisticated array of piping and nozzles ,sprayed all over the dumb Goyim ,they even turn it off when they have passed over the towns involved .so don’t give me your filthy lies and say it’s Contrails when we know they are CHEMTRAILS .

By Bob McDonld on 2014 07 21 - 21:37:53
From the entry 'Contrails dissipate quickly whereas chemtrails linger?'.

Hey Bubba, you will never support anyone who is taking the time to dissect current issues because you are too distracted with quick overviews from other websites.  You only want to know the NEXT story, not what’s actually going on.  In regards to Herewards presentation of the show, what are YOU doing to challenge the mainstream distortion of events? Also, do you really enjoy listening to Alex Jones’ tired & irrelevant repetition’s of events in his life which waste half his air time?  Concentrate on the content and stop whining unless of course you think you can do a better job.  Hereward, you are doing an outstanding job (from a real Truth News subscriber).

By Zen Prepper on 2014 07 21 - 12:32:10
From the entry 'Dissecting doublethink on the Israel/Gaza conflict'.

Wow Bubba, you sure are insightful. I guess you must be a subscriber eh? Good on you mate.

By Johnny Came Lately on 2014 07 20 - 21:13:06
From the entry 'Dissecting doublethink on the Israel/Gaza conflict'.

I like the idea of Truth News and it is a great setup, but I can’t stand Hereward Fenton’s high pitched, annoying voice.  If you had a better speaker I would happily subscribe.  Also, a lot of your stuff seems a bit Johnny Come Lately as I find most of this on Drudge, Infowars and People’s Voice.  Hereward would make a great journalist writing articles and news stories, but don’t get him to talk on air.

By Bubba on 2014 07 20 - 19:52:26
From the entry 'Dissecting doublethink on the Israel/Gaza conflict'.

Have you ever considered publishing an e-book or guest authoring on other blogs? I have a blog based on the same ideas you discuss and would love to have you share some stories/information. I know my viewers would appreciate your work. If you are even remotely interested, feel free to send me an e mail.

By WillianHeadlam on 2014 07 19 - 22:03:53
From the entry 'The pale shadow of democracy'.

Good onya Hereward, excellent job pointing out the bleeding obvious brainwashing mind control techniques so clumsily employed by the ABC and rest of the corporate controlled propaganda outlets. It really is sickening and while I applaud your efforts to expose and deconstruct this muck I don’t envy you the task, though I concede it really does need to be done. Personally I don’t have the stomach for it anymore ... since I gave up the MSM back in 2004, my tolerance for it has dropped to ZERO. Love your show, kepp up the good work.

By John Scrivener on 2014 07 14 - 16:50:31
From the entry 'Paul Gunter on nuclear power, WMDs and the Fukushima Daiichi disaster'.

Hi Josh.
FYI. I don’t have time for a debate. I’m just supplying information for your perusal.  I’m a farmer in the South Burnett. I’ve been watching the skies all my life because my existence depends on the rate of precipitation. Too much or too little is a problem.
I have been watching the development of what we call chemtrails for at least 25 years. My research tells me that they have many nasty uses and are an integral part of geoengineering which you should also check out.
We have minimal jet, and air, traffic here except for when rain is imminent. At those times, depending on the likely amount of precipitation, we get numerous jets spewing out chemtrails that expand to many times the size of what leaves the exhaust of planes. (The few times we get a passenger plane there is either no contrail or one that disperses within a minute. ) Some days there are numerous planes spewing out the stuff: 2 and 3 at a time in some instances. Recently there were so many that the sky turned metallic grey and the sun was obscured to such a point that even the unenlightened were asking what on earth was going on. The metallic grey and sun phenomenon were observed from Gympie to Biggenden.
We had a flood in the early part of last year. The next rain of any use at all was in March this year. I thought it strange that it was just the right time to get farmers in the planting mood at just the right time. My suspicions were correct: no useful follow up rain so many that planted have already realised they wasted borrowed capital.
Believe what you wish but if this rot is not stopped more and more farmers will crash and burn. The general populace will be next.
Regards
Cris

By Cris on 2014 07 13 - 11:42:19
From the entry 'Contrails dissipate quickly whereas chemtrails linger?'.

The article following my comment is from http://www.truthnews.com.au chemtrails segment titled “CONTRAIL SCIENCE which I can only describe as JUNK SCIENCE. This forum gets funnier by the day, or at least by the intervals of time wherein I come back to look for new jokes. I am, as is written here, ANY PILOT, as described by the author of the “CONTRAIL SCIENCE” segment below, and also an aircraft maintenance engineer, retired. I am somewhat amused by the glider pilot, JOSH ANONYMOUS who makes feeble attempts to “correct” what I have written every now and then, but then I suppose there is always room for even more humour.
For those who obviously do not understand the mechanics of contrails, I offer the following for consideration. As is known, one tonne of fuel cannot be magically converted to 1.5 or 3.5 tonnes of water, or whatever the magic figures are that are bandied about. The water that is produced in the creation of power/thrust from turbine engine combustion, both jet and propeller types at altitude, is a clear-cut matter. The fuel that is burned CONTRIBUTES to the formation of the resultant water droplets that are borne (past participle of bear) of the combustion process and pass into the freezing air behind the aircraft to be rapidly condensed and form a contrail (condensation trail).
To believe that an aircraft carries aloft water, in its fuel supply, sufficient to produce more than the weight of the fuel on board at take-off is simply nonsensical. To understand how the water is “produced” we need look no further than an example. On a clear blue winter day, with not a cloud in the sky, with ambient conditions (humidity, temperature, wind) in the suitable range, we note that a Boeing 747 burns about (approximately) 10 tonnes/hour of fuel (aviation kerosene) in cruise (4 engines) and we consider Pratt and Whitney JT-9 engines. The amount of air that is compressed and goes through the engines (4) in one second is approximately 2,832 cubic metres (100,000 cubic feet). All figures approximate due to unknown variations in ambient conditions. This means that there are about 2,832 x 60 x 60 cubic metres of air through the four engines every hour at cruise. i.e. 1,019,520 cubic metres per hour. The aircraft travels at about 500 knots True Airspeed (mach .85). Consider humidity to be say50%, for an example only, it means that the air mass is not saturated so NO CLOUD can or will form. The aircraft gathers and compresses air at a rate of 2,832 cubic metres each second, passing it through its engines at a ratio of 23.4 to 1.
A relative humidity of 100% means that the air can’t hold any more water vapour. It’s totally saturated. When this occurs, it can rain if the temperature falls. In fact, the RELATIVE HUMIDITY MUST BE over 100% where clouds have formed for it to rain. The relative humidity MUST BE 100% for cloud to form and supersaturation, i.e. over 100% relative humidity must occur for rain to fall. However, at ground level where the rain lands, the relative humidity can be less than 100%. So, at 50% humidity, there is no possibility of cloud forming, and all the water in the atmospheric air that is compressed and put through the can (the annular combustion chamber) will be instantly boiled, turned to steam and passed through the can and out the exhaust. Water does not burn, it simply changes state from liquid to gas, then back to liquid after being exhausted. As the water vapour reaches the outside freezing air it is immediately condensed and is seen as a contrail which is just condensation, hence the name “condensation trail”.

Now we begin to realise that on this clear day, with no cloud about, the exhausted condensation can only cool to the temperature of the surrounding atmosphere, and the water vapour will be absorbed by the surrounding drier air. Considering that that aircraft is surrounded by many cubic kilometres of drier air, we can see that here is no chance that the condensation can cause the surrounding air to become 100% saturated and form cloud. To claim so would be to say that, as an example, we could throw a bucket of ice cubes into an Olympic swimming pool and expect the ice cubes to freeze the surrounding water, or throw a bucket of boiling water into a similar swimming pool and expect the surrounding water to boil or even at least heat a little. Sorry, but absorption into the surrounds is what controls events. If the story of enduring contrails had any legs, we would have no need to spend fortunes, as we have over many decades, with attempts to seed cloud and make rain, we would just need to fly large aeroplanes around and around through clouds, or anywhere at all and even make it rain over deserts.

The claims that contrails “spread” out and form cloud are just plain, good old-fashioned bullshit spread by ignorant people.
If anybody knows any of the laws of thermodynamics that contradict what I have written here, please proffer it as I will be fascinated to see. C P Snow made the only real sensible comment about the laws of thermodynamics when he said that the first law tells you that you can’t win, and the second tells you that you can’t even break even.

And by the way, for the information of the author of the “CONTRAIL SCIENCE” there is NO solar heating of the atmosphere, as all heat rises from the ground after the sun’s heat passes through the atmosphere to the ground.

From http://www.truthnews.com.au
CONTRAIL SCIENCE
  For a contrail to form, suitable conditions must occur immediately behind a jet engine in the expanding engine exhaust plume. A contrail will form if, as the exhaust gases cool and mix with surrounding air, the humidity becomes high enough (or, equivalently, the air temperature becomes low enough) for liquid water to condense on particles and form liquid droplets. If the local air is cold enough, these newly formed droplets then freeze and form ice particles that make up a contrail.
  Because the basic processes are very well understood, contrail formation for a given aircraft flight can be accurately predicted if atmospheric temperature and humidity conditions are known.
  After the initial formation of ice, a contrail evolves in one of two ways. If the humidity is low, the contrail will be short-lived. Newly formed ice particles will quickly evaporate. The resulting contrail will extend only a short distance behind the aircraft. If the humidity is high, the contrail will be persistent. Newly formed ice particles will continue to grow in size by taking water from the surrounding atmosphere. The resulting line-shaped contrail extends for large distances behind an aircraft. Persistent contrails can last for hours while growing to several kilometers (spelling kilometres) in width and 200 to 400 meters in height. Contrails spread because of air turbulence created by the passage of aircraft, differences in wind speed along the flight track, and possibly through effects of solar heating.
  Thus, the surrounding atmosphere’s conditions determine to a large extent whether or not a contrail will form after an aircraft’s passage, and how it evolves. Other factors that influence contrail formation include engine fuel efficiency, which affects the amount of heat and water emitted in the exhaust plume.
  - source
TNRA is informed by science and is not interested in propping up anyone’s belief systems, and we don’t apologise for that.
But, please, don’t take it from me, speak to any meteorologist or ANY PILOT and they’ll tell you straight, that there is HUGE variation in the length and persistence of contrails. Sometimes they don’t form at all, other times they form, but dissipate quickly, other times they persist and spread out.
That’s the facts folks, and it’s been that way since planes first went up in the sky.
If you believe otherwise, I’m afraid you’ve been conned.
Forgive me if I seem rude or impatient on this topic, but every few months I come across a new wave of people who have been subjected to the same false propaganda about chemtrails, and I have to run the same arguments and cite the same articles over and over again. It does wear one’s patience down.
Before making some kind of angry reply, I urge you to read this article and associated links. It’s fairly detailed, and deals with most of the usual claims made by chemtrail alarmists.
Finally, let me qualify all this by saying that I do not doubt that geo-engineering programs exist, and that, indeed, some of the patented techniques discussed at international forums include the creation of artificial cirrus cloud. Does this, however, entitle you to conclude that every spreading contrail you see is an example of such geo-engineering? Think about it. (I have - LEONARD CLAMPETT)

By Leonard Clampett on 2014 07 12 - 22:34:31
From the entry 'Contrails dissipate quickly whereas chemtrails linger?'.

Ooooops,

Just to amend my previous post, “(pending),oligarchical, cataclysmic collapse”!

P.S

If permaculture is not your very best friend, “MAKE IT SO”..........................................

In Lak’ech.

By Macca on 2014 07 09 - 07:22:18
From the entry 'Elisa Barwick on the world economy'.

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