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Comment Re:Nope, can't make a gun-type with Pu (Score 1) 192

You can make a gun-type bomb with impure plutonium, what you can't do is make one short enough to deliver in a missile or a plane. Built diagonally on the 100th floor of an office building or more feasibly at ground level in a dockside warehouse however....

You "just" need to increase the assembly velocity, and there are ways of doing that which are simpler than building an implosion device. And as you point out a fizzle is still a significant yield, and much dirtier.

Give a final year physics student a mechanical workshop and the plutonium, all they'd need is the funding.

Comment Re:Sure beats jail time... (Score 1) 1145

when their bottle supplier decides to call it a day

Unlikely to change for that reason. Cheap beers might come in standard bottles but premium beers tend to have custom bottles anyway with brand names and logos in the glass. As long as they see a benefit in branded bottles they can have them made any size they like at no change in the cost.

Canned beer is virtually all in 330ml quantities

I assume you're Australian then? In the UK canned beer is 440 ml or 500 ml. Only soft drinks tend to come in 330 ml cans. 250 ml bottles are very rare here but 330 ml is common for many imported beers.

Comment Re:Working to cover for the USA (Score 1) 340

Can someone please explain what this distinction is that Americans are making between holidays and vacation days? It's not something that's familiar to me.

I get 5 (usually) bank holidays in a year, i.e. public holidays when the vast majority of people are off work, 25 days paid holiday and I can build up 8 days worth of flexi leave in a year. By default I can only carry 5 days over and use them within 2 months but in practise if there's a good justification, like that it benefits the project, then I can carry over whatever I like.

Comment Re:Probably (Score 5, Insightful) 761

I would like to include rape for the death penalty but the Supreme Court has said no, that's too cruel.

You absolutely should not have the same punishment for rape as for murder. Doing so gives rapists a big incentive to kill their victims: without the victim as a witness they're much less likely to get caught and if the penalty is identical....

This should hold true whether you think the death penalty is a good idea or not.

Comment Re:EPIRB (Score 1) 340

Not really necessary if you just have a copper plate connected with copper wires. There won't be any electrolytic action so long as that RF ground is d.c. isolated from everything else metallic i.e. you couple it to your radio via a low-leakage capacitor that is transparent to the RF but doesn't allow any d.c. currents to circulate between that copper plate and anything else that is metallic and immersed in the sea water.

Comment Back on my first one after the new ones broke (Score 1) 341

I think I've had 4 keyboards in the last ten years. I started with a Dell "Quietkey" (it isn't) that I think is late 90s, then I switched to the keyboard that came with my new PC, went through it in under a year, got through a couple more cheap ones and now I'm back with the (not-so-)Quietkey. I'll change that when it breaks.

I'm curious now, and having to resist the temptation to take it apart to find something with a date code.

Comment IMEI not just "easily readable" (Score 2) 102

The IMEI is not just "easily readable" it's sent unencrypted whenever a call is made. This was a deliberate design choice, it could have been sent after the encrypted connection was established but the writers of the specification chose otherwise - the motivations for this have never been explained but a lot of people have drawn their own conclusions.

In any case my point is that it's even easier than TFA suggests to obtain someone's IMEI.

Space

Submission + - Nuclear Powered LEDs for Space Farming (forbes.com)

DevotedSkeptic writes: "The nearside of the Moon will never resemble your Granddad’s back forty, but agriculture remains the key to living and working off-world. All the mineral ore in the solar system can’t replace the fact that for extended periods on the Moon or Mars, future off-worlders will need bio-regenerative systems in order to prosper.

Here on earth, researchers still debate how best to make those possible, but nuclear-powered state of the art LED (Light-emitting Diode) technology is arguably what will drive photosynthesis so necessary to provide both food and oxygen for future lunar colonists.

Future long-term lunar residents will need to grow their food either in sub-lunar lava tubes or in greenhouses shielded with several meters of lunar surface regolith. With no atmosphere, the moon is regularly exposed to lethal doses of cosmic rays, solar coronal mass ejections and x-flares, not to mention micro-meteorites that would be enough to wreck anyone’s corn.

Although during the two weeks that make up the long lunar day astronauts might be able to funnel refracted sunlight into covered greenhouses or subsurface lava tunnels, they will be left without a light source during the long lunar night.

Current solar-powered battery storage technology isn’t adequate to sustain artificial light sources for two weeks at the time. Thus, the most practical solution is simply to use some sort of Radioisotope Thermoelectric Generator (RTG), not unlike the one powering the current Mars Science lab, to power the LEDs that will spur photosynthesis in lunar greenhouses.

Cary Mitchell, a plant biologist at Purdue University, says that as lunar light sources, LEDs would be cool, solid state and robust; lasting 50,000 hours at least, or some five times longer than conventional horticultural light sources. He also notes that that they could survive the journey to the lunar surface where they could then be strung inside inflatable lava tunnel greenhouses or in radiation-hardened, solid greenhouses on the surface.

On earth, Mitchell says it takes roughly 50 square meters of agriculture to provide both food and oxygen life to support one human. But, as he points out, who can say how productive plants are ultimately going to be on the moon, in gravity that is only one sixth that of earth?"

Submission + - Breakthrough in battery technology could lead to practical electric cars (bbc.co.uk) 3

An anonymous reader writes: An Israeli engineering firm has developed a breakthrough battery technology that can near instantly recharge the battery of an electric vehicle. Long battery recharge times have long been a barrier to widespread adoption of electric vehicles. The BBC article reviews this new technology.

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