What's the hottest topic in physics?

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The discussion highlights that carbon nanotubes are currently the most popular topic in physics, according to a new ranking system developed by Michael Banks. This ranking uses the Hirsch index, which measures the citation impact of individual scientists to determine the significance of various scientific fields. Following carbon nanotubes, nanowires and quantum dots rank second and third, respectively. The index aims to assist graduate students in selecting their PhD fields by identifying trending areas in physics. Overall, this new metric could reshape how emerging scientists approach their research focus.
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Fusion?

I hear that temperatures get pretty "Hot" in nuclear Fusion...

*symbol crash*

(sorry couldn't resist)
 
Salma Hayek?
 
Carbon nanotubes!
http://nanotechweb.org/articles/news/5/5/5/1
Carbon nanotubes are the hottest topic in physics, according to a new way of ranking the popularity of different scientific fields. Nanowires are second, followed by quantum dots, fullerenes, giant magnetoresistance, M-theory and quantum computation. The new ranking has been developed by Michael Banks, a PhD student at the Max Planck Institute for Solid-State Physics in Stuttgart, Germany. He thinks the index could be a quick and simple way of determining the most important subject areas in physics and could even help graduate students choose which field to do their PhD in (physics/0604216).
The new index is based on the "Hirsch index", which was devised last year by Jorge Hirsch of the University of California at San Diego as a way of quantifying the performance of individual scientists. Hirsch's h-index is derived from the number of times that papers by a particular scientist are cited. A scientist with an h-index of 10, say, will have published 10 papers that have received at least 10 citations each. The best researchers should therefore have the highest h-indexes.
 
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comparing a flat solar panel of area 2π r² and a hemisphere of the same area, the hemispherical solar panel would only occupy the area π r² of while the flat panel would occupy an entire 2π r² of land. wouldn't the hemispherical version have the same area of panel exposed to the sun, occupy less land space and can therefore increase the number of panels one land can have fitted? this would increase the power output proportionally as well. when I searched it up I wasn't satisfied with...
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