Recent years have brought a significant Solar observations and state-of-the-art 3D MHD simulations during the recent years have significantly advanced our understanding of the structure and dynamics of the quiet Sun and active regions (QSAR) down to very small spatial scales. Today we know that QSARs are very dynamic and exhibit a plethora of physical processes. In particular, it has become clear that the various solar layers are strongly coupled with each other and must be considered consistently. Thus, the goal of this session is to bring together researches from various sub-areas of QSAR studies to envision a bigger synthetic picture. The emphasis of the session will be given to new multi-wave observations in decimeter, microwave, millimeter, sub-millimeter, infrared, optical, UV and X-ray bands from already available instrument (e.g., SDO, IRIS, Hinode, NST, ALMA, LOFAR, EVLA) as well as microwave facilities, which are under construction/expansion now (e.g., Expanded OVSA, multiwavelength SSRT, MUSER) on one hand, and on state-of-the-art simulation and modeling (MHD, NLFFF, coronal heating) on the other hand. We anticipate intensive interaction between the observational and modeling components of the session both towards a better understanding of the QSAR physics and also towards diagnostics of the corresponding magnetic and thermal structures using the available observational tools.