You can't stop progress?
Slashdot videos: Now with more Slashdot!
I feel obliged to point out that isotopic fractionation is not "central" to carbon dating. The key to carbon dating is that radioactive carbon-14 decays to nitrogen-14 with a half life of roughly 5700 years, enabling biological material to be dated by its residual carbon-14 content. That is not isotopic fractionation, it's radioactive decay. Isotopic fractionation would be involved if you observed a difference in the ratio of carbon-12 to carbon-13 in plants versus that same ratio in the air.
Honestly, I'd bet the reason the test designers are using these correct "incorrect" answers is because they know they can't include more appropriate examples of non-testable theories. Specifically: "God created the Earth in 7 days", "God created man in his own image", etc. etc.
Also because what we know about thermodynamics tells us that analogous non-carbon (e.g. silicon) "organic"-molecules are less stable and thus less likely to be the basis for life.
Dead on. It's not like you can just look at a pile of dirt (or ice) and tell whether there's something living in it. And you certainly can't do life detection from orbit unless you have a serious biosphere going, which obviously none of these outer solar system moons have. And the Europa drilling ideas that people like to throw around aren't going to be technically feasible in the time frame of the missions to Mars -- if ever.
I'm not arguing that this is a good or bad idea, but it won't do anything to change grade inflation. In my experience (as a TA for a number of different classes), college professors look at the point totals at the end of the semester and determine the letter grade cutoffs by hand so that they have the grade distribution they want. I'm not saying they're going through and making sure specific students get a particular grade, just that they want, say 50% A's 30% B's and 20% C's and they'll put the cutoffs where they need to be for that to happen. Just because the essays are graded tougher doesn't mean they can't still give half the class an A.
That's true. You could have at least chosen a bird instead.
Other criticism of the study aside, a group of people who might be interested in how well pictures are remembered after short glances are advertisers and marketers.
Exactly! What this study ignores, consciously I'm sure, is the affective domain. They basically ask, "which of these image that you don't care about at all do you remember?" They don't ask, "which picture from you vacation is your favorite?"
I think using the word "memorable" is slightly misleading for this reason, because memorable has a connotation that is much broader than merely "remembered". It implies that there is an emotional connection to something.
Link to Original Source
Link to Original Source
I wish the people and governments of these island countries well and I certainly think they should try whatever they can to get attention for their plight, but the lesson learned in COP15 is that the major industrial powers of the world are not willing to make major changes in their greenhouse gas emissions. And basically the rest of the world can't do a damn thing to make them.
In other news, I just pre-ordered my iPad Nano.
37 in town
Suck it Prius!