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German professor Ludwig Prandtl presents one of the most important papers in the history of aerodynamics, an eight-page document describing the concept of a fixed “boundary layer,” the molecular layer of air on the surface of an aircraft wing. Over the next 20 years Prandtl and his graduate students pioneer theoretical aerodynamics.
Wilbur and Orville Wright of Dayton, Ohio, complete the first four sustained flights with a powered, controlled airplane at Kill Devil Hills, 4 miles south of Kitty Hawk, North Carolina. On their best flight of the day, Wilbur covers 852 feet over the ground in 59 seconds. In 1905 they introduce the Flyer, the world’s [...]
Samuel Pierpont Langley builds a gasoline-powered version of his tandem-winged “Aerodromes.” the first successful flying model to be propelled by an internal combustion engine. As early as 1896 he launches steam-propelled models with wingspans of up to 15 feet on flights of more than half a mile.
Small talk is part of everyday life, but it’s the substantial, meaningful conversations that may make you happy. That’s one possibility suggested in a new study examining how conversation connects to happiness. Researchers, led by Matthias Mehl at the University of Arizona, looked at the different types of conversation that happy and unhappy people participate [...]
The American Cancer Society recommends that men weigh the risks of treatment before agreeing to prostate screening. Most men 50 and older should seriously consider the potential risks of treatment before deciding whether to be screened for prostate cancer, the American Cancer Society said Wednesday in revised guidelines.”What we are trying …
MEDINA, Ohio — A local woman, frustrated by the rising costs of health care, wrote a letter to the president. Much to her surprise, President Obama didn’t just read her letter. He also read it out loud at a health care reform meeting at the White House. Thursday, President Obama was …
The term “foodborne illness” is relatively new. It was coined over the past few decades. Yet humans have been infected by cryptic-sounding pathogens like Campylobacter jejuni, Escherichia coli O157, Listeria monocytogenes, and Cyclospora cayetanensis for millennia.”The first description that we have of symptoms associated E. coli 0157 infection goes all …
Dr. William Schreiber, a primary care physician, said cuts in Medicare payments to doctors will force them to consider boycotting Medicare patients. NEW YORK (CNNMoney.com) — When you think of low-paying jobs, doctor doesn’t usually come to mind. But with a 21% cut in Medicare payments slated to take effect later this month, physicians who [...]
Pandora founder Tim Westergren said he hopes Pandora will remain profitable in 2010 after posting its first profit in the fourth quarter of 2009. In an online world saturated by struggling streaming music services, Internet radio site Pandora appears to be making all the right moves. Last year, the 10-year old company recorded its first [...]
A growing number of software companies are capitalizing on an unexpected business opportunity: Internet censorship. In countries where governments continue to ramp up Web filtering systems, more people are searching for tools that will allow them to access inaccessible information — and they are willing to pay for them. Such tools include virtual private networks [...]