1. DIFFERENT GEOMETRIES FOR MINIATURAL MASS SPECTROMETERS. Authors: C. CUNA, B. TUZSON, D. IOANOVICIU.2. HOW ALTERATION OF ELECTRIC PARAMETERS CAN DETERIORATE TIME-OF-FLIGHT MASS SPECTROMETER PERFORMANCE. Authors: D. IOANOVICIU, V. COSMA, C. CUNA, M. KAUCSÁR, A. PAMULA, B. TUZSON.