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Distant galaxy a Star Factory?

Galaxy w/ 4.4 Redshift. Evidence shows stars have formed, lived, and died spilling their contents out into the interstellar gas. Observatory @ Rome obtained first images of new galaxy, tough to detect. The most prominent absorption line with the high redshift is Lyman-alpha from H2 atoms that absorb quasar's light as it passes. S +

Material Science on the internet

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MRI Elstography

A nuclear magnetic resonance imaging (MRI) method is presented for quantitatively mapping the physical response of a material to harmonic mechanical exciation. The resulting images allow calculation of regional mechanical properties. Measurements of shear modulus obtained with the MRI technique in gel materials correlate with independent measurements of static shear modulus. The results indicate that displacement patterns corresponding to cyclic displacements smaller than 200 nanometers can be measured. The findings suggest the feasibility of a medical imaging technique for delineating elasticity and other mechanical properties of tissue. S +

Replicator NN for Universal Coding

Replicator neural networks self-organize by using their inputs as desired outputs; they internally form a compressed representation for the input data. A theorem shows that a class of replicator networks can, through the minimization of mean squared reconstruction error (for instance, by training raw data examples), carry out optimal data compression for arbitrary data vector sources. Data manifolds, a new general model of data limiting case, optimal-compression replicator networks operate by creating an essentially unique natural coordinate system for the manifold. --fin
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