Study of time structure of individual EAS at PeV energies
EAS detected by GREX array have been sampled by means of highly segmented 8 m 2 bakelite RPC in the GREX/COVER_PLASTEX (G/C_P) experiment. Delay distributions of particles with respect to the first arriving particle in the EAS front at PeV energies have been analysed for individual events in the core distance range 0–100 m. Individual distributions have been compared with integrated inclusive distributions measured in the same experiment. Comparison with simulations confirmed the difference between the mean width of inclusive and individual arrival time distribution.
Libraries must attend the needs of their different users. Academics are usually a particular kind of users with specific needs. Universities are environments where scientific communication is essential and where electronic format of journals is becoming more and more frequently used. This way it becomes increasingly important to understand how academics from different scientific areas use the available electronic resources. The aim of this study is to better understand the existing differences among the users of electronic journals in Engineering and Social Sciences. The research undertaken was mainly focused on the study of the use of electronic journals by teachers/researchers from the Faculties of Engineering and of Arts from the University of Porto, Portugal. In this study an international survey was used in order to characterize the levels of use and access of electronic journals by these communities. The ways of seeking and using scientific information, namely in terms frequency of access, the numbe...