Forgot your password?
typodupeerror

Comment: Re:The US slides back to the caves (Score 1) 528

by Alsn (#47782533) Attached to: Limiting the Teaching of the Scientific Process In Ohio
Swedes most certainly do not, as our superior language (no bias here!) has two different words that describe what a geological continent is (kontinent) and what a geopolitical part of the world is (världsdel).

Just because English with it's hundreds of thousands of words don't make that distinction doesn't mean other languages don't.

Comment: Re:haha. they call if "charging the battery" (Score 2) 363

by Alsn (#47173889) Attached to: Group Demonstrates 3,000 Km Electric Car Battery
My google fu yields the following:
http://www.world-aluminium.org/statistics/primary-aluminium-smelting-energy-intensity/
Efficiency varies around the world between 13000-16000 kWh per 1000kg of aluminium.

Assuming the entire quoted weight of 100kg is aluminium (which according to the article the batteries are "made mostly of aluminium"), that's at best 50% efficient assuming your ballpark estimate of 600 kWh. Compared to an internal combustion engine that's not too shabby.

However, I feel like a demonstration like this probably used an extremely lightweight car in order to maximize the range for the test. I'm thinking 600 kWh is probably a bit too optimistic.

Comment: Re:Could be worse (Score 1) 191

If it's 50 people per tutor then that itself might be the issue.

I'm currently studying medicine in Sweden (on my second semester, which is somewhat equivalent to "pre med" in the US system) and we are using PBL and focusing on it quite strongly.

Every week we have two PBL-meetings which usually involves a typical case regarding the subject the week's learning is supposed to be about (this week it's about memory and forming memories on a neuronal level in the brain and the case is about an old man forgetting things and getting lost while driving his car).

Anyway, we are in 9 person groups, 1 paid tutor who's usually a lecturer or scientist working at the university and 8 students. It's really hard to not actively take part in such a small group which seems to be the entire point.

This is of course not the only thing we do, we still have lectures as usual but they are not mandatory in any way other than the practical exercises. So far I'm liking it very much and it seems to be an extremely effective way to teach. We need to present our findings for our peers on a weekly basis and the opening session usually includes a lot of debating and discussions which help you "get into" the studying.

Comment: Re:Discussed to death on Bruce Schneier's blog... (Score 3, Interesting) 332

by Alsn (#46802517) Attached to: Why Portland Should Have Kept Its Water, Urine and All
"Untreated" when referring to drinking water is an incredibly vague statement. Where I live, the city of Helsingborg, Sweden the water is "untreated" in the sense that it is pumped as is from a lake 80 km away through a long tunnel. It is then pumped into the groundwater at the edge of the city where it is pumped up and into the city's plumbing system which supplies almost 100k households.

It's untreated in the sense that no artificial chemicals or filtering is taking place, but soil sediment filtering is one of the most ancient and effective ways of filtering water so there is a massive difference compared to an untreated open air reservoir where pretty much anything can go die and decompose.

Comment: What does this mean for the "out of Africa" model? (Score 4, Interesting) 120

by Alsn (#46203035) Attached to: Britain's Eastern Coast Yields Oldest Human Footprints Outside Africa
As far as I know, the model states that humans migrated from Africa a couple of hundred thousand years ago. Footsteps in Britain from "humans" 1 million years ago would seem to contradict this? Or does this simple mean that these footprints are a Neanderthal precursor species or something similar that's not actually "proper" humans?

Anyone with some more knowledge of this care to shine a light on this?

What the large print giveth, the small print taketh away.

Working...