In order to answer the fundamental open question of ``Where do nuclei and elements come from'', studies of nuclear properties with powerful rare isotope beam (RIB) facilities are critical. Moreover, with the recent astonishing observation of the first neutron star merger by astronomers, understanding nuclear spectroscopic properties of short-lived nuclei has become very important to demonstrate outcomes of the event such as gamma-ray, optical and X-ray emissions. However, because most of the key nuclei constraining the nucleosynthesis models including the rapid proton capture process (rp-process) and the rapid neutron capture process (r-process) are far from stability, our understanding of astronomical observables is still very limited due to large uncertainties in calculated properties of the nuclei and a lack of measurements with radioactive ion beams for the spectroscopic information. While there are a few RIB facilities in the world, which provide short-lived radioactive beams to perform studies of nuclear properties of exotic nuclei, new generation RIB accelerator facilities around the world including FRIB in the U.S., RIBF in Japan and RAON in Korea will be available soon. Recent experimental studies of key nuclei performed at the existing facilities will be presented as well as new active research activities at the Center for Exotic Nuclear Studies (CENS), Institute for Basic Science (IBS). Future plans on how to take advantage of the new facilities including RAON will also be addressed.
Digital humanities, as the intersection of computing and the disciplines of the humanities, have offered new opportunities for teaching and research innovation that complement the traditional approach in the humanities. While surveying the past, present, and future studies in the humanities, this lecture explores how the digital transformation will influence science classics.
This year marks the 30 years to launch the first Korean satellite KitSat-1. South Korea is now on the verge of entering the space economy era based on technological capability in the space sector and increased private capacity. The talk will illustrate the process of Korea's space development system from a historical point of view, first, and will touch on the policy issue related the limitations of the current national space innovation system, including governance, government R&D, space industrialization, space security/defense, international cooperation for exploration and diplomacy, and so on.
The protostellar phase, an early phase of star formation, has recently gained the spotlight as a phase for planet formation. On the other hand, the place of planet formation, “disk”, is difficult to identify in the protostellar phase because disks are embedded in envelopes in this phase. Identifying a disk also tells us the most important parameter of the protostar, central stellar mass M*. Previous works reported observational identification of disks in protostellar systems. The method is, however, different from work to work. To verify the consistency among different methods, I applied representative methods to synthetic observations using a magnetohydrodynamic simulation of protostellar evolution. This test demonstrates that a method using position-velocity diagrams can estimate the disk size and the central stellar mass accurately, particularly when M* >~ 0.2 Msun. Our group has been using this method with SMA and ALMA observations almost for a decade and are continuing to develop it. Even after a disk is identified in a protostar, the system provides questions related to the disk and planet formation: e.g., how the disk obtains mass or how dust grains grow in the disk. I introduce a case study of the protostar TMC-1A to investigate these questions, based on dust continuum, spectral line, and dust polarization observations using the SMA and ALMA. In addition to these studies I accomplished in KASI, I would also like to review my activities in KASI during the ~3-yr term.