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Entries from September 1, 2014 - September 30, 2014

Tuesday
Sep302014

Fresnel Haze

I wander through the world of engineering like an old beachcomber, pulling baubles from the sand where my work-mates would rather I was digging a deep hole of knowledge in one spot. Today I discovered fresnel zones and a fascinating insight. A fresnel cone influences how radio waves are disturbed by the ground beneath the signal, even if there is an uninterrupted line from the transmitter to the receiver. Counter-intuitively, the lay of the land can interfere with or even amplify the signal.

It seems to me that haze works in the same way. Though the light from a distant object passes directly to your eye, the surrounding landscape can influence the quality and colour of what you see. Can the ground create haze even if the air is supposedly clear? Can the presence of low cloud force light out of phase, dulling the view? Can a clear sky actually detract from the clarity of the horizon?

A series of experiments presents itself.  Do the colours of seascapes vary in intensity according to whether the breeze is on- or off-shore? The same may apply to other water landscapes. What about a dry field against a wet one. Does it intensify the colour of the sky or wash it out? When sunlight comes under hanging cloud, is it the colour of the cloud which creates that particular intensity or is the cloud amplifying the colours of the landscape. Does the light over a city, with its vertical surfaces, behave differently to light over a cement coloured landscape - The Burren for example. Is the light over a forest different to the light over a marsh, or a field of green, cloned, crops? How do these factors meld with the more obvious effects of reflected colour? Does rain depress a landscape because of the way that the falling drops reflect the light? Is this why wood is more pleasing to the eye than less natural, textured surfaces? Might these things be manipulated for artistic effect?

 

Tuesday
Sep162014

The Earth is not Afraid

By chance I have slipped into a curious job with a company on the bleeding edge of technology. For now that job takes me to the edges of society: elite research establishments, game shows, special forces in training and now this. We trundle across a rough road deep in the nameless High Plains, passing rows of huge derelict warehouses cut with overgrown railway tracks. They soon give way to bunkers. Mile upon mile of bunkers made of re-enforced concrete, covered over with the rough earth and then forgotten. Some are full of air and spiders, but some are filled with sick and brutal things that someone, once, thought was a good idea. Our mission is to delve into these secret places and do the tiniest part to rid the world of the abominations that lurk there, in those shadows.

I have seen a few of these places now. They are secure. No wandering hunter comes here. No itinerant tree-feller. No one will eat the meat of this land or burn its wood, even if they could. But nature takes advantage of the quiet and slips its gentle fingers over these lands. In an hour we saw two bobcat kittens at play, a badger, a village of prairie dogs, an eagle, jackrabbits and a kangaroo rat. All tame as can be. There are human predators here, but they hunt other humans, not rabbits.

We move along. The front range of the Rockies glows in the distance and the late sun lights their snowcaps and distinctive grain in fine detail. The last of the High Plains roll up to them, dipping away and shimmering. The plains are a mile high, the air is dry as ash. The foreground burgeons with blue-green sagegrass edged in liquid yellow sun. The Earth covering the bunkers has been reclaimed by the slow but nail-hard bushes. Tumbleweed rolls up their slopes and softens the yellow concrete. From the rear, against the distant mountains, under the ice blue afternoon sky, a herd of tiny gazelle mount the bunker, clustering like soldiers raising a flag, conquering this most highly guarded of human lands.

No. The Earth is not afraid of humans. No artefact of man can touch it. All our bombs combined might bruise it for a while, but the worst of our weapons would simply drive the evolution that would sweep our works aside. No, the Earth is immortal and we humans, we are not.