La universitat funciona més bé que la política i l'empresa

La universitat catalana actual, deixant de banda els econòmics, té dos problemes. Un és la lentitud a adaptar-se i respondre a les demandes ciutadanes. El segon és la manca d'un sistema ben definit i sistemàtic de retiment de comptes a la societat. Resolts ambdós problemes, la universitat faria en poc temps un gran canvi per bé. La resposta a aquests problemes pot donar-se amb petites modificacions de la norma externa i algunes de més profundes en la interna que aportin més flexibilitat i autonomia

Morphological and Magnetic Properties of Superparamagnetic Carbon-Coated Fe Nanoparticles Produced by Arc Discharge.

Spherical carbon coated iron particles of nanometric diameter in the 5-10 nm range have been produced by arc discharge at near-atmospheric pressure conditions (using 5-8·10 4 Pa of He). The particles exhibit a crystalline dense iron core with an average diameter 7.4 ± 2.0 nm surrounded by a sealed carbon shell, shown by transmission electron microscopy (TEM), selected-area diffrac- tion (SAED), energy-dispersive X-ray analysis (STEM-EDX) and electron energy loss spectroscopy (EELS). The SAED, EDX and EELS results indicate a lack of traces of core oxidized phases showing an efficient protection role of the carbon shell. The magnetic properties of the nanoparticles have been investigated in the 5-300 K temperature range using a superconducting quantum interference device (SQUID). The results reveal a superparamagnetic behaviour with an average monodomain diameter of 7.6 nm of the nanoparticles. The zero field cooled and field cooled (ZFC-FC)magnetization curves show a blocking temperature (TB)at room temperature very suitable for biomedical applications (drug delivery, magnetic resonance imaging-MRI-, hyperthermia).

Espacio público: universidad, censura y política. Un ensayo visual

Lisbon, October 27, 2014, Dr. Jose Luis Cardoso director of the Institute of Social Sciences (ICS) at the University of Lisbon, has suspended the publication of the number 212 of the prestigious journal Análise Social. The reason: the number contains a visual essay produced by Ricardo Campos that is qualified to use a 'strong language'. While the online edition of the magazine was available (not try to find it at the site of the ICS) the printed edition was in printing machines. Now, the hard copies will be destroyed.

La Violència contra les dones: una realitat política = La violencia contra las mujeres: una realidad política

Aquest any al seminari que organitzem al Centre de Recerca en Estudis de les Dones Duoda de la Universitat de Barcelona, ens hem proposat interrogar-nos, una vegada més, sobre una de les realitats humanes i polítiques mes crues en què es concreta el desordre que causa en alguns homes, en el present, el que anomenem el "final del patriarcat": la violència contra les dones. Aquesta violència, que ha existit des que va sorgir el patriarcat per a intentar apoderar-se de la paraula i del sentit del ser dona en el món, és ja expressable per a moltes dones a Occident i també a Orient

Off-Diagonal Magnetoimpedance Dependence of Magnetostriction and Anisotropy in Co-Based and Fe-Based Amorphous Ribbons

The object of this work is the comparison of domain structure and off-diagonal magnetoimpedance effect in amorphous ribbons with different magnetostriction coefficient. The Co66Fe4Ni1Si15B14 and Fe80B20 samples were obtained by melt-spinning. During the quenching procedure a 0.07 T transverse magnetic field was applied to some of the samples. Domain patterns obtained by the Bitter technique confirm that the differences on the samples are related to the different anisotropy and magnetostriction coefficient, and the quenching procedure. Small changes on the anisotropy distribution and the magnetostriction coefficient can be detected by the off-diagonal impedance spectra as a consequence of the different permeability values of the samples