Page 383 - Detection News Today

>> so you got michael lewis and he book ended the fellow who figured out what was going on of the he worked at a large investment firm and he couldnt figure out why they would put in a trade and they would wind up getting part of it filled at the price they agreed to, but so much -- the rest of it was at a higher price. turns out -- he mall a guy from ireland and did the figuring out, that these high speed traders, what theyre doing is theyre using fiber optic technology. so theyre able to see w...

To come within about a mile of the pinger, just like the one he is holding. >> i can search approximately 50 square miles a day. so, really, if were searching for a beacon and were living on borrowed time, i need something that is only less than a thousand square miles. >> right now were dealing with over 100,000 square miles? >> yes. >> reporter: as you said, challenging. >> its very low probability of detection if that is our search area. >> reporter: and thats a sobering thought for the famil...

Like the one hes holding. >> i can search approximately 50 square miles a day. so really if were searching for a beacon and living on borrowed time, i need something that is only less than 1,000 square miles. >> right now were dealing with over 100,000 square miles. >> yes. >> as you said, challenging. >> its very low probability of detection. that is our search area. >> thats a sobering thought for the families of those missing as we board "ocean shield" those working to deploy her are mindful ...

The signal was somehow blocked by rugged underwater terrain or other obstacles. >> even plant life, seaweed, plant life, coral, any of those things can detract from the signal and even temperature changes in the water, if you have a thermal layer, it can hide that pinging. it can hide any kind of detection that you might have. >> reporter: oceanographer david gallo helped find the recorders in the air france crash with the help of sonar, high-resolution cameras and deep-sea drones. >> we took 85...

You cannot explain away a doubling of prevalence in the last ten years by better detection, and while we certainly have that in thanks to organizes like autism speaks and others, there is more awareness. there are so many unanswered questions, which is why autism needs to be a national public health priority. we need a national strategy that includes all the stakeholders, the medical community, researchers, educators, policy makers, people living with autism right now, to come together right now...

But search crews scanning the indian ocean have not found a sign of flight 370 or any floating objects believed to match those captured on satellite. >> its not perfect. its a combination of fallibility of the human eye, the surface conditions. >> reporter: bottom line a visual search among waves that can be as tall as a two-story building is the best option but not a perfect one. >> assume a 100% coverage meaning youre actually physically looking at every square inch of search area, the best we...

Bottles, things like this from merchant vessels. >> reporter: time is of theess sense to make that determination. heres another possibility in this rough part of ocean its possible that search crews could miss floating objects because of the fallibility of the human eye and the possibility these objects are blending in with the water. historically visual searches have a 78% possibility for detection in a first search in flat, calm water. but when you is a lot of wave action that decreases. renee...

Eye and service conditions. >> reporter: bottom line, waves as high as two-story buildings is the best option but not a perfect one. >> assume 100% coverage, means youre visibly looking at every square inch of the search area. the best we normally get on a long-term average is about 78% probability of detection. >> reporter: and thats in calm water. waldoch predicts this makes it only about 50%. big waves also make it hard for planes and ships to detect objects on their radar. >> the wreckage th...

Without the pinger. it took two years to find it from flight 447 after it crashed off the coast of brazil in 2009. search teams towed pingers near the debris field days after the crash and heard nothing, suggesting that pingers had stopped working or the signal was somehow blocked by rugged underwater terrain or other obstacles. >> even plant life, seaweed, coral, any of those things can detract from the signal and even temperature changes in the water. if you have a thermal layer, it can hide t...

Community and found that one in five diagnoses made as a result of mammograms were overdiagnoses and many undergo aggressive treatment but others still say early detection through mammograms is essential. it was early detection that made all of the difference for my msnbc colleague andrea mitchell and she powerful told the country on air. >> for women, screening matters, do it. this disease can be completely curable if you find it at the right time. >> andrea mitchell, chief foreign affairs corr...