Monday, January 31, 2011

Moderm "Mother Goose"



Wonderful to see you again. Coffee’s hot and the aromas are heavenly. Unless Madge is wearing the new ‘chocolate doughnut # 5’ by Chanel under her arms, it’ll be the tray of muffins and other treats she’s bringing out of the kitchen. Say…what do you know about geese? Careful now…

Did you know that bar-headed geese accomplish the extraordinary feat of migrating over the Himalayan mountain range twice a year, flying between their wintering grounds in southern Asia to their breeding grounds in the central Asian highlands? These birds have even been spotted over the summit of Mt. Everest, where oxygen levels are only about one-third that at sea level.  I’ve got some bar-headed friends. At least, that’s where they’re usually headed!

In order to better understand the exceptional physiological capability of bar-headed geese, Dr. Jessica Meir of the University of British Columbia (UBC) embarked upon a study with the goal of flying bar-headed geese in a wind tunnel, while monitoring various aspects of their physiology. 

Meir traveled to the Sylvan Heights Waterfowl Park in North Carolina to seek the bar-headed geese for her study, arriving just in time for the hatching of this year's bar-head recruits.  Because she was the first person or thing that the goslings set eyes upon after they were born, the imprinting process was set in motion and Meir began her role as "Mother Goose." 

Over the last seven months, Meir has spent her days with the gaggle, bonding with them and taking them on walks and outings. And when the birds began flying, she began leading flight-training sessions on a scooter with a bird at her side, at speeds ranging from 20 to 35 mph (32 to 56 kph).

“It is hard to miss the excitement in Meir's eyes as she cruises down the road on her scooter, the wingtip of one of her goslings brushing her shoulder at times, as she stares into the eye of this magnificent bird in the midst of flight, just inches away from her.” What kind of malarkey is that, eh?  First of all, if you can see the excitement in her eyes, I guess that means you’re running along beside her, and on the same side as the flying goose, huh? Don’t step in the goose poop. Yes, indeed. Birds can poop on the fly. I’ve seen it happen and luckily moved swiftly out of the way. Kind of wish I could… no, never mind. 

Secondly, why would she be ‘staring’ into the bird’s eye? I mean there she is travelling at 35 mph down the road. Oh, sure, I can see the occasional glance but staring takes time, doesn’t it? Seems to me she’d be better to keep her eyes on the bloody road! Wouldn’t want to be staring at a goose and hit a cow now would she? After all that is way out in the country, right? 

Bob

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Sunday, January 30, 2011

Earth's Magnetic Field Shifts, Forcing Airport Runway Change



Earth's Magnetic Field Shifts, Forcing Airport Runway Change

Hi there. I notice you're flying past the doughnuts. Grab one for both of us, would you? Off the virtual top shelf so they're the low fat ones, okay? Better snag them before Madge moves the tray on you.

Things are always moving around here. Now, even North isn't really North anymore. Can you believe that? The magnetic north pole is currently hovering over the North Sea and moving toward Siberia . This means two Florida airports are renumbering their runways.

Odd as this connection may appear on the surface, the adjustments under way at Tampa International Airport and beginning next week at Peter O'Knight Airport are the result of a natural, ongoing process.

Earth's magnets

The Earth has an iron core, and movement within its outer part is likely responsible for sustaining a magnetic field, which constitutes much of what we measure at the Earth's surface. As a result, the Earth resembles something of a giant magnet with two poles: magnetic north and magnetic south. However, its field is not perfectly symmetrical and has undulations that are always moving around, according to Jeffrey Love, a research scientist with the U.S. Geological Survey's Geomagnetism Program.

The magnetic poles don't line up with the geographic ones, and the difference between them is an angle called declination . As if this wasn't enough of a nuisance for navigators, the Earth's magnetic field drifts, causing the angle of declination to change over time.

In fact, it drifts about one-fifth of a degree a year at lower latitudes, such as Florida . "So that means if you wait five years, the compass will be off by one degree," Love said.

For long-distance air travel, an error of only a couple of degrees could translate to arriving in the wrong airport, Love said. Yeah, like you get on a flight going to Miami and end up in Vladivostok, eh. “Oops,” said the pilot!

Runways are designated according to the points on a compass, and the drifting magnetic north means that they, periodically, need to be renamed.

Maybe that's what happened to my luggage, eh!

Bob

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