1. DIMENSIONALITY OF BIG DATA SETS EXPLORED BY CLUJ DESCRIPTORS. Authors: MIRCEA V. DIUDEA, SUBHASH BASAK, ATENA PÎRVAN-MOLDOVAN, BEATA SZEFLER, SARA ERSALI, CLAUDIU LUNGU.2. FLUORESCENCE INVESTIGATION OF SOME POLYSTYRENE SAMPLES THERMALLY DEGRADED. Authors: MIHAI TODICA, CLAUDIU LUNGU, IOANA BREZESTEAN, CARMEN NICULĂESCU.