In this paper I will briefly review some theoretical results that have been obtained in recent years for spin glasses and fragile glasses. I will concentrate my attention on the predictions coming from the so called broken replica symmetry approach and on their experimental verifications. I will also mention the relevance or these results for other fields, and in general for complex systems.

This paper reports on a study conducted in primary school Santiago, Chile, where sample of 18 randomly selected first-grade students wore mini video camera mounted eyeglasses their mathematics’ lessons. Using Google Images, we identified frames from the recordings classroom teacher appeared students’ visual field. The results show that low and high achieving differed paying attention mathematic...

In this paper we develop further a metl~od recently introduced by one of us to study metastable states in spm glasses. We consider a 'potential function', defined as the

Efficient photoinduced second-harmonic generation in Ce-doped bulk lead germanate glasses is observed. A linear increase of photoinduced second-order nonlinearity with Ce concentration is obtained. The reported glasses can be encoded for frequency doubling with extremely low (as little as 30 W of peak power at 1.064 microm) preparation intensities.