kansando
Joined 19 years ago
Joined 19 years ago
I should point out that the system specifically disadvantages Indians and Chinese relative to say Mexicans, Canadians and everyone else. This coincides with an increasing level of opportunity in these countries relative to 1991 in India. To compare the two is making a fact-free argument, since even in a rational scenario, the relative attractiveness of the US has diminished over time.
I think asking that Vivek return to India is an unnecessary ad-hominem attack. There are many reasons that people choose to stay here including personal ones (wife, kids, etc. don't want to go back) not all of which are driven by relative opportunity.
There are really three questions at hand: 1> Does the sample show the Meissner effect, 2> Does it show zero resistance, and 3> Is it stable under addition of impurities. It turns out that for most ceramic compounds, even if 1 is true, 2 and 3 are often not true. For example, the Cuprates (the first to cross the 77K mark) actually have a higher resistance close to the critical temperature than copper. Point 3 is especially damning as sensitivity to impurities also means you can't draw these things into wires (certainly not wires you can bend) as the very act of bending may introduce defects that change local concentration of ingredients and hurt the superconductivity.
So the burden of proof remains very high, and the small blurb is very underwhelming.
I mean is this even a serious question?