Navigating One’s Social Relationships to Thrive: Uncovering and Understanding the Divergent Effects of Supportive Social Relationships.

Decades of empirical work indicate that supportive relationships play a vital role in human flourishing. For instance, people who have more supportive relationships have better mental and physical health, higher levels of subjective well-being, and lower rates of morbidity and mortality (e.g., Cohen & Wills, 1985; House, Landis, & Umberson, 1988; Thoits, 1995). However, despite a plethora of compelling evidence, how supportive relationships benefit individuals is not well understood (cf. Cohen & Janicki-Deverts, 2009; Feeney & Collins, 2015; Thoits, 2011). Moreover, a growing number of studies has begun to show that at times receiving support can lead to negative outcomes (e.g., Bolger, Zuckerman, & Kessler, 2000; Bolger & Amarel, 2007). Thus, a better understanding of the psychological conditions under which supportive relationships influence individuals is necessary. This three-paper dissertation investigates the mechanisms by which supportive relationships and interactions promote thriving. By thriving, I refer to an individual’s capacity to cope with stress or adversity, as well as learning, growing, and working to achieve goals. Chapter 1 uses experimental and nationally representative cross-cultural survey methods to demonstrate that supportive relationships promote personal growth. In addition, I show one mechanism—feelings of self-confidence—that helps explain the link between supportive relationships and personal growth. Chapter 2 investigates a novel hypothesis on the effects of how people think about their social support on their goal-pursuit. Four experiments demonstrate that participants who were led to think abstractly (vs. concretely) about their social support showed higher intent to pursue their goal and worked harder toward their goal. Chapter 3 examines one critical mechanism by which support-providers enable support-recipients to cope with their distressing personal events. Two laboratory experiments demonstrate that support-recipients who interacted with support-providers who facilitated them to reconstrue (vs. recount) their negative experience felt less negative affect and reported a higher sense of closure. Moreover, I show that these findings occur regardless of the support-recipients’ preference to receive a certain type of support. Collectively, the dissertation delineates different processes through which supportive relationships and interactions promote personal thriving, and also the conditions under which supportive relationships can impede thriving.PhDPsychologyUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/133398/1/dsjlee_1.pd

Chimera Dynamics of Generalized Kuramoto-Sakaguchi Oscillators in Two-population Networks

Chimera dynamics is characterized by the coexistence of coherence and incoherence, arising from a symmetry-breaking mechanism. Extensive research has been performed in various systems, focusing on a system of Kuramoto-Sakaguchi (KS) phase oscillators. In recent developments, the system has been extended to the so-called generalized Kuramoto model, wherein an oscillator is situated on the surface of an M-dimensional unit sphere, rather than being confined to a unit circle. In this paper, we exploit the model introduced in New. J. Phys. 16, 023016 (2014) where the macroscopic dynamics of the system was studied using the extended Watanabe-Strogatz transformation both for real and complex spaces. Considering two-population networks of the generalized KS oscillators in 2D complex spaces, we demonstrate the existence of chimera states and elucidate different motions of the order parameter vectors depending on the strength of intra-population coupling. Similar to the KS model on the unit circle, stationary and breathing chimeras are observed for comparatively strong intra-population coupling. Here, the breathing chimera changes their motion upon decreasing intra-population coupling strength via a global bifurcation involving the completely incoherent state. Beyond that, the system exhibits periodic alternation of the two order parameters with weaker coupling strength. Moreover, we observe that the chimera state transitions into a componentwise aperiodic dynamics when the coupling strength weakens even further. The aperiodic chimera dynamics emerges due to the breaking of conserved quantities that are preserved in the stationary, breathing and alternating chimera states. We provide a detailed explanation of this scenario in both the thermodynamic limit and for finite-sized ensembles. Furthermore, we note that an ensemble in 4D real spaces demonstrates similar behavior

Cohomology Isomorphism of Symmetric Power of Cotangent Bundle of Ball quotient and Its Toroidal Compactification

In this paper, we investigate the $L^2$-Dolbeault cohomology of the symmetric power of cotangent bundles of ball quotients with finite volume, as well as their toroidal compactification. Through the application of Hodge theory for complete hermitian manifolds, we establish the existence of Hodge decomposition and Green's operator. Moreover, we extend the results by Adachi [A21] and Lee-Seo [LS23-2] from compact complex hyperbolic spaces to complex hyperbolic spaces with finite volume.Comment: 28 page

Nontrivial Twisted States in Nonlocally Coupled Stuart-Landau Oscillators

A twisted state is an important yet simple form of collective dynamics in an oscillatory medium. Here, we describe a nontrivial type of twisted state in a system of nonlocally coupled Stuart-Landau oscillators. The nontrivial twisted state (NTS) is a coherent traveling wave characterized by inhomogeneous profiles of amplitudes and phase gradients, which can be assigned a winding number. To further investigate its properties, several methods are employed. We perform a linear stability analysis in the continuum limit and compare the results with Lyapunov exponents obtained in a finite-size system. The determination of covariant Lyapunov vectors allows us to identify collective modes. Furthermore, we show that the NTS is robust to small heterogeneities in the natural frequencies and present a bifurcation analysis revealing that NTSs are born/annihilated in a saddle-node bifurcation and change their stability in Hopf bifurcations. We observe stable NTSs with winding number 1 and 2. The latter can lose stability in a supercritical Hopf bifurcation, leading to a modulated 2-NTS

The Effects Of Technology Readiness And Technology Acceptance On Nfc Mobile Payment Services In Korea

The Near Field Communication (NFC) mobile payment is the integration of NFC enabled smartphones and credit/debit/prepaid cards. Korea is a pioneer in rolling out the NFC mobile payment. Global mobile industries pay attention to whether Korean mobile users accept the new payment service. This study investigates the factors for technology acceptance using an integrated model of technology readiness and technology acceptance. Structured equation modeling is used to analyze the collected data. The four constructs of technology readiness (innovativeness, optimism, discomfort, and insecurity) have significant impact on the perceived ease of use and the two technological characteristics of NFC mobile payment (responsiveness and smartness) also have significant impacts on the perceived usefulness. However, only the perceived usefulness affects significantly on the intention to use. The perceived ease of use affects indirectly on the intention to use through the perceived usefulness. The result of this study suggests that to be a successful payment service, the NFC mobile payment service has to be much more focused on the usefulness against other alternative payment methods