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Post by pat perry on Oct 28, 2007 6:40:17 GMT 9
From Kim Komando's weekly PC Newsletter LinkHow do they put the first down line on your TV screen during a football game? Q- I’m an avid football fan, so I spend many hours in front of the set. But one thing confuses me: How do they get the first-down line on the field? My buddies and I have talked about it a lot, but have no idea how it’s done. Do you have any insight? Jack in Phoenix, listening on KFYI, 550 AM A- The first-down line confuses many people. That’s because it is a bit of a technical marvel. For those who aren’t football buffs, let me explain. In recent years, football broadcasts have shown a yellow line stretching across the field. The team on offense must reach that line for a first down. The technology was developed by Sportvision. Putting a yellow line across a field seems fairly easy. But in this case, it is very complex. It requires a bevy of equipment, including eight computers. It also requires at least four people to accomplish the task. First, there is a special camera mount for each camera recording a game. The mount tracks all of the camera’s movement. For example, it records zoom, tilt and pan. That way, the computers can understand what the cameras are doing. The system can update a camera’s movements 30 times per second. So it is able to position the line correctly based on the camera’s perspective. Next, there’s a computerized three-dimensional model of the field. The computers know where the cameras are located in relation to the field. This helps them orient the first-down line. Of course, players and other objects can cross the virtual line. So the system has to be able to sense this. That way, the first-down line does not get placed over players or the ball. There are actually two color palettes that help with this. One includes the colors that should be changed to yellow—for example, the green of the field. The other palette includes colors that should not be changed to yellow. This includes the player’s uniforms. That way, the line appears to be on the field and can be obscured by the players. Once the system determines what parts of the field should be painted yellow, the data is sent with the raw video to a computer. The computer then draws the line. And now you know, Pat Perry 456th FIS
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Post by pat perry on Oct 28, 2007 12:31:53 GMT 9
Webmaster of the 456th FIS site has got the site back in operation and continues to tune it up. Check it out www.456fis.orgThanks Bob! Pat Perry 456th FIS 66-68
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Post by Mark O on Oct 28, 2007 12:43:43 GMT 9
Way to go Pat!! I'm glad to hear the good news about Bob and Polly. I have to say I learn something new every time I go to the 456th site. All the best, Mark
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Post by daoleguy A.J. Hoehn (deceased) on Oct 28, 2007 13:04:55 GMT 9
Not a promise, but I do host some Vet sites FREE. Anyone with a legit site, let me know. I DO NOT allow huge image hosting or vids however. Currently I host three sites dealing tieh the VFW and VVA overseas. Drop me a note, maybe I can help all of us keep our presence there.
AJ
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Post by lindel on Oct 28, 2007 21:49:03 GMT 9
Wow! Nice site. Thanks Bob!
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Post by pat perry on Jan 11, 2008 0:40:28 GMT 9
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Post by pat perry on Feb 24, 2008 3:12:13 GMT 9
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Post by Jeff Shannon on Feb 24, 2008 15:32:45 GMT 9
Ah yes the ACES II seat at it's finest. Any ejection system is a good one as long as they punch out in the envelope. Pat....341 F-106's shoot we could resupply the Squadrons all over again COUNT ME IN !!!!
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Post by lindel on Feb 24, 2008 23:14:27 GMT 9
Where do I sign?!?!?!
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Post by Tom Dlugosh on Feb 25, 2008 4:51:42 GMT 9
Ya know, I wouldn't mind breaking out my BFH again.
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Post by pat perry on Nov 7, 2008 6:46:04 GMT 9
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Post by Mark O on Nov 7, 2008 12:36:42 GMT 9
Wow! Excellent video! Thanks for posting! Mark
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Bullhunter
Global Moderator
318th FIS Jet Shop 1975-78
Currently: Offline
Posts: 7,375
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Post by Bullhunter on Nov 7, 2008 13:14:25 GMT 9
Yes, Thanks, Very educational.
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Post by pat perry on Jan 27, 2009 7:45:12 GMT 9
Thanks to 456th Pilot Barney Barnes: I didn't know it either, however, a similar type of phenomenon happens with super cooling. You might have experienced it in Alaska. You can have a bright clear day with 100 miles visibility until the first aircraft takes off and suddenly the field socked in with zero vis. The stirring of the air caused super cooled moisture to cling to condensation nuclei forming "ICE FOG". Barney Microwaving Water and having it explode!A 26-year old man decided to have a cup of coffee. He took a cup of water and put it in the microwave to heat it up (something that he had done numerous times before). I am not sure how long he set the timer for, but he wanted to bring the water to a boil. When the timer shut the oven off, he removed the cup from the oven. As he looked into the cup, he noted that the water was not boiling, but suddenly the water in the cup 'blew up' into his face. The cup remained intact until he threw it out of his hand, but all the water had flown out into his face due to the build up of energy. His hole face is blistered and he has 1st and 2nd degree burns to his face which may leave scarring. He also may have lost partial sight in his left eye. While at the hospital, the doctor who was attending to him stated that this is a fairly common occurrence and water (alone) should never be heated in a microwave oven. If water is heated in this manner, something should be placed in the cup to diffuse the energy such as a wooden stir stick, tea bag, etc.., (nothing metal). General Electric's Response:Thanks for contacting us, I will be happy to assist you. The email that you received is correct. Microwaved water and other liquids do not always bubble when they reach the boiling point. They can actually get superheated and not bubble at all. The superheated liquid will bubble up out of the cup when it is moved or when something like a spoon or tea bag is put into it. To prevent this from happening and causing injury, do not heat any liquid for more than two minutes per cup. After heating, let the cup stand in the microwave for thirty seconds! before moving it or adding anything into it. Here is what our local science teacher had to say on the matter: 'Thanks for the microwave warning. I have seen this happen before. It is caused by a phenomenon known as super heating. It can occur anytime water is heated and will particularly occur if the vessel that the water is heated in is new, or when heating a small amount of water (less than half a cup). What happens is that the water heats faster than the vapor bubbles can form. If the cup is very new then it is unlikely to have small surface scratches inside it that provide a place for the bubbles to form. As the bubbles cannot form and release some of the heat has built up, the liquid does not boil, and the liquid continues to heat up well past its boiling point. What then usually happens is that the liquid is bumped or jarred, which is just enough of a shock to cause the bubbles to rapidly form and expel the hot liquid. The rapid formation of bubbles is also why a carbonated beverage spews when opened after having been shaken.' If you pass this on you could very well save someone from a lot of pain and suffering. Pat P. (this has happened to me before while using a new or very clean cup) :
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Jim Scanlon (deceased)
Senior Staff
FORUM CHAPLAIN
Commander South Texas outpost of the County Sligo Squadron
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Retired: USAF NBA: Spurs NFL: Niners MLB: Giants NHL: Penguins
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Post by Jim Scanlon (deceased) on Jan 27, 2009 8:45:04 GMT 9
:teacher Well, now. Seems to me the answer is to never wash your coffee cup. You know like the ones hanging on the pegs by the hanger coffee pot. Seems simple enough to me. :
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Post by lindel on Jan 27, 2009 9:13:57 GMT 9
Isn't washing a coffee cup akin to sacriledge?? Kinda like removing the flavor...
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Post by Gene on Jan 27, 2009 9:54:25 GMT 9
alton brown, the host of the foodnetwork show "good eats", uses science to explain many of the processes used in cooking... he spent half a show explaining how and what mircowaves do. he pretty much said what g.e. said... : i miked a cup of water once, and when i poured a tablespoon of instant into it, it erupted violently all over me and the counter.. :confused gene :god_bless_usa
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Post by pat perry on Feb 7, 2009 5:29:45 GMT 9
This posting is from Jim Scanlon Only the neck and shoulders prove there is a human being in there somewhere. This is how the next generation of RAF fighter pilots will look. And with piercing green eyes staring out from behind the visor, it's no surprise that the helmet has been compared to Arnold Schwarzenegger's killer robot in The Terminator. Pilots flying the F-35 Joint Strike Fighter will have an astonishing array of technology encasing their heads - enabling them to see right through their own aircraft fuselage to the ground below. Go here to read the article: ClickThanks Jim Pat P. :us_flag
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Post by pat perry on Mar 10, 2009 2:58:21 GMT 9
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Post by pat perry on Mar 17, 2009 7:43:05 GMT 9
What is St. Patrick's Day and why do we celebrate it? Click HereAnd what the heck does Erin Go Bragh mean? Click HereWhile we destroy old worthless brain cells with the green beer on St. Paddy's we can now learn why we do this wonderful celebration every year! Pat P.... The Foine Irish Lad :green-beer
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