Quasars to fill a gap of Bell's theorem | Gaianews.it

A search for distant radio-loud quasars in the CLASS survey: three new radio-selected quasars at z>4

We report on the search for distant radio-loud quasars in the Cosmic Lens All Sky Survey (CLASS) of flat spectrum radio sources with S5GHz > 30 mJy. Unresolved optical counterparts were selected from APM scans of POSS-I plates, with e < 19.0 and red o−e > 2.0 colours, in an effective area of ∼ 6400 deg. Four sources were found to be quasars with z > 4, of which one was previously known. This sa...

Spectral gaps for spin systems : some non - convexphase

We prove that a convex phase may be perturbed into a non-convex phase preserving the spectral gap properties of the unbounded spin system with nearest neighbour interaction associated to this potential. The proof is based on Helffer's method that reduces the spectral properties of the unbounded spin system to some uniform spectral gap of the one-dimensional phase. We then make use of Hardy's cr...

Testing Bell's inequality with cosmic photons: closing the setting-independence loophole.

We propose a practical scheme to use photons from causally disconnected cosmic sources to set the detectors in an experimental test of Bell's inequality. In current experiments, with settings determined by quantum random number generators, only a small amount of correlation between detector settings and local hidden variables, established less than a millisecond before each experiment, would su...

Test Method Facet and the Construct Validity of Listening Comprehension Tests

The assessment of listening abilities is one of the least understood, least developed and, yet, one of the most important areas of language testing and assessment. It is particularly important because of its potential wash-back effects on classroom practices. Given the fact that listening tests play a great role in assessing the language proficiency of students, they are expected to enjoy a hig...

Bell's Theorem without Hidden Variables