Influences of self-construals and personality styles on international students\u27 depressive symptoms.

The literature suggested that personality styles (i.e., sociotropy and autonomy; Beck, 1983) are vulnerability factors that could – in interaction with stress - trigger mental health concerns. Culturally influenced self-construals (Kashima, Yamaguchi, Kim, Choi, Gelfand, & Yuki, 1995; Markus & Kitayama, 1991) also detect how individuals function in a sociocultural context. While the number of international students in the U.S. increased over the past decades, their reported mental health concerns warrant more attention. This study explored relationships among self-construals, personality styles, domain-specific stressful life events, and depressive symptoms among international students in the U.S. Participants were 579 international students (identified as holding F-1/J-1 visas) recruited from universities across the U.S. Participants completed an online survey consisting of items that assess personality styles, self-construals, social anxiety, stressful life events, and depressive symptoms. Results of path analyses, controlling for social anxiety, confirmed the associations between personality styles and self-construals, and further yielded significant associations with depressive symptoms. No significant relationship was found between a tripartite model of self-construal and the interactions of personality styles and domain-specific stressful life events. However, the interaction of negative achievement life events and autonomy was found to be significantly related to depressive symptoms. Mediation analyses showed that sociotropy mediated the relationship between collective self-construal and depressive symptoms. Implications in regard to working with international students were discussed in light of these findings

Phase Transition of Finite Size Quark Droplets with Isospin Chemical Potential in the Nanbu--Jona-Lasinio Model

Making use of the NJL model and the multiple reflection expansion pproximation, we study the phase transition of the finite size droplet with u and d quarks. We find that the dynamical masses of u, d quarks are different, and the chiral symmetry can be restored at different critical radii for u, d quark. It rovides a clue to understand the effective nucleon mass splitting in nuclear matter. Meanwhile, it shows that the maximal isospin chemical potential at zero temperature is much smaller than the mass of pion in free space.Comment: 12 pages, 3 figures. To appear in Physical Review

What Powered the Optical Transient AT2017gfo Associated with GW170817?

The groundbreaking discovery of the optical transient AT2017gfo associated with GW170817 opens a unique opportunity to study the physics of double neutron star (NS) mergers. We argue that the standard interpretation of AT2017gfo as being powered by radioactive decay of r-process elements faces the challenge of simultaneously accounting for the peak luminosity and peak time of the event, as it is not easy to achieve the required high mass, and especially the low opacity of the ejecta required to fit the data. A plausible solution would be to invoke an additional energy source, which is probably provided by the merger product. We consider energy injection from two types of the merger products: (1) a post-merger black hole powered by fallback accretion; and (2) a long-lived NS remnant. The former case can only account for the early emission of AT2017gfo, with the late emission still powered by radioactive decay. In the latter case, both early- and late-emission components can be well interpreted as due to energy injection from a spinning-down NS, with the required mass and opacity of the ejecta components well consistent with known numerical simulation results. We suggest that there is a strong indication that the merger product of GW170817 is a long-lived (supramassive or even permanently stable), low magnetic field NS. The result provides a stringent constraint on the equations of state of NSs

4,4′-Azinodibenzoic acid

The title compound, C14H10N2O4, shows crystallographic inversion symmetry and has one half-mol­ecule in the asymmetric unit. In the crystal, mol­ecules are linked into chains running along the cell diagonal by O—H⋯O hydrogen-bonding inter­actions