We probe the region around the protostar HH108MMS by deep mid infrared photometric and polarimet-ric imaging. The protostar is detected at 14µm in absorption against the diffuse background. Next to HH108MMS, we find a second absorbing core, named Q1, and the young stellar object IRAS18331-0035 which is more advanced in its evolution and already seen in emission at 12µm and 14µm. HH108MMS, Q1 an...

All polynomial invariants of links for two dimensional solutions of Yang-Baxter equation is constructed by employing Turaev’s method. As a consequence, it is proved that the best invariant so constructed is the Jones polynomial and there exist three solutions connecting to the Alexander polynomial. Invariants for higher dimensional solutions, obtained by the so-called dressings, are also invest...

We have identified 7 new magnetic DA white dwarfs in the Early Data Release of the Sloan Digital Sky Survey. Our selection strategy has also recovered all the previously known magnetic white dwarfs contained in the SDSS EDR, KUV03292+0035 and HE0330–0002. Analysing the SDSS fibre spectroscopy of the magnetic DA white dwarfs with our state-of-the-art model spectra, we find dipole field strengths...

We probe the region around the protostar HH108MMS by deep mid infrared photometric and po-larimetric imaging. The protostar is detected at 14µm in absorption against the diffuse background. Next to HH108MMS, we find a second absorbing core, named Q1, and the young stellar object IRAS18331–0035 which is more advanced in its evolution and already seen in emission at 12µm and 14µm. HH108MMS, Q1 an...

NOTE. Distal cysts are defined as cysts with a low sodium concentration, thereby maintaining a steep gradient between cyst fluid and plasma sodium concentrations. Proximal cysts are defined as those with a sodium concentration not greatly different from the plasma concentration [3]. a Detection limit. a Additional members of the Studio Italiano Trapianti e Infezioni are listed at the end of the...

We extend a combinatorial encoding of families of pairwise disjoint convex sets in the plane recently introduced by J. E. Goodman and R. Pollack to the case of families not in general position. This encoding generalizes allowable sequences, which encode finite planar point sets. Further we prove several results on realizability questions, and discuss a number of different combinatorial properti...

Multiplicative preconditioning is a popular SVD-based techniques for the solution of linear systems of equations, but our SVD-free additive preconditioners are more readily available and better preserve matrix structure. We combine additive preconditioning with aggregation and other relevant techniques to facilitate the solution of linear systems of equations and some other fundamental matrix c...