The castAR glasses also have an overlay which make use of the projector for more traditional VR.

OK. It's even semi-relevant. Jeri Ellsworth is about to release a 3D VR/AR project that I think is WAY more exciting than Oculus, and it's completely novel (or at least I haven't seen anything like it). The glasses project an image out onto the world so 3D objects are "in" the real world - the beginnings of a holodeck-like technology. It's called castAR... check it out on YouTube, but you can tell from peoples impressions it's a genuinely fresh experience, not just 3D done over with new tech.

OK, so I should be worried about the mercury and not the lead, cadmium etc... Got it.

Doh... premise of the COMMENTS

Mod up... Part of what is so refreshing about F/OSS is that it's self directed by passionate people. There's something obviously wrong with the premise of the article. If patrons are the real source of vitality in Linux and F/OSS why are the most successful distros clustered around Debian and not Redhat?

Apparently "glacial" development was still good enough to steal market share from the commercial Unix vendors.

There's mercury. From the paper: "4) Lead, Manganese, Mercury and Cadmium All four of these elements were higher in the Gladstone mud crab hepatopanceas tissues compared to the reference site. Indicating that Gladstone crabs were exposed to a higher total body burden of metals/metalloids."

ack! JCU is a world leader... not my friend (in case the language was ambiguous).

About 20 years ago it was noticed that many of these reefs were dying back. An important cause? Increased sediment discharge from those same rivers you were talking about... apparently clearing vegetation, runoff from cities and agriculture was doing the damage. My brother is a builder and it's law that he take great care about sediment control from his building sites, as is the case with many other sediment generating activities. This is not news in North Queensland. The prospect of lead, mercury, cadmium etc... in seafood isn't exciting either. Apparently trace elements in anaerobic sediments become bioavailable after they're dredged up then get concentrated up the food chain. This happened during the 80's a few hundred kilometres south in Gladstone and closed a fishery. (I've attached a paper documenting this elsewhere in this thread).

Not REALLY concerned about crabs here... I should have spelt it out, but although copper is a real problem for sea life the bioavailable lead, cadmium, aluminium and arsenic isn't much good for seafood lovers like me. It wasn't just in the crabs either.

You're an idiot. My brother is a builder, and must be ultra careful to control sediment flow from his building sites. This is because the reef was dying, studies were done, and it was realised increased sediment runoff from clearing, agriculture, cities etc... was killing the reef. We were much more careful about this kind of thing, but apparently these days that's all greeny bullsh*t, and we're back to carefree shovelling.

It might surprise you. Dredging like this basically closed the Gladstone mudcrab and barramundi fishery - the anerobic sediments contain trace elements which suddenly became bioavailable when exposed to oxygen. They were finding lesions on crab shells and fish from being exposed to copper, mercury, arsenic, aluminium, lead etc... I posted a link to a paper elsewhere in this thread.

This paper is probably also relevant. It's about crabs from the commercial fishery near Gladstone developing holes in their shells. The conclusion was dredging was exposing anerobic sediments to oxygen releasing copper, arsenic and a bunch of other metals and compounds which had a detrimental effect on sea life.

I've just been speaking to a friend of mine who studied marine biology at James Cook University (a world leader in this kind of thing) and is a bit of a fish nerd. There's a reason the reef only starts 30km offshore. Coral is evolved for low nutrient low sediment conditions. Milky water cuts the light, and extra nutrients encourage filimentous algae which basically take over and shade the coral. Even the seagrass beds are very fragile especially at the moment after the natural disasters (floods, cyclones etc...) we've been having lately - the Southern Dugong is almost extinct. This stuff is widely known and care is taken even down to the building site level etc... to control sediment runoff. Apparently at the micro scale we need to worry about this, but at the macro scale it's no worries mate.

...many important concepts useful to logical and critical thought can be learned this way. I guess it's up to the educators to decide the best way to get students to grok these skills. Coding for codings sake? Wrong reason.