Alien Registration- Arsenault, Sisly M. (Rumford, Oxford County)

https://digitalmaine.com/alien_docs/13446/thumbnail.jp

UNDERSTANDING MEDIA RICHNESS AND SOCIAL PRESENCE: EXPLORING THE IMPACTS OF MEDIA CHANNELS ON INDIVIDUALS’ LEVELS OF LONELINESS, WELL-BEING, AND BELONGING

Loneliness is a universal part of being human and is detrimental to well-being. The need-to-belong hypothesis claims that individuals frequently having positive interactions with people close to them mitigates their loneliness. Media richness theory adds that rich media channels allow individuals to perceive higher levels of social presence and maintain those vital, close relationships. Understanding how a given media channel impacts online interactions and, in turn, the interactants is vital. This study used a pretest-posttest equivalent groups experimental design to examine if individuals who interacted with a close relationship partner over a rich media channel would have a decrease in their perceived loneliness levels or an increase in their perceived well-being and sense of belonging (pre-interaction to post-interaction) compared to those who communicated via less rich media channels. The results indicated that the richness of a given channel increased with the number of verbal and nonverbal cues the media channel could communicate; video chat had the highest richness, followed by phone calls and text messages. Although texting had a significantly lower level of social presence, participants did not indicate a difference in social presence felt between video chat and phone calls. Neither media richness nor social presence produced an effect on loneliness, well-being, or belongingness. Overall, the findings suggest that, for a healthy population, no channel of communication examined here is better or worse in terms of its effects on short-term loneliness, sense of belonging, and subjective well-being

Alien Registration- Arsenault, Alice M. (Brewer, Penobscot County)

https://digitalmaine.com/alien_docs/11478/thumbnail.jp

Benchmark of a modified Iterated Perturbation Theory approach on the 3d FCC lattice at strong coupling

The Dynamical Mean-Field theory (DMFT) approach to the Hubbard model requires a method to solve the problem of a quantum impurity in a bath of non-interacting electrons. Iterated Perturbation Theory (IPT) has proven its effectiveness as a solver in many cases of interest. Based on general principles and on comparisons with an essentially exact Continuous-Time Quantum Monte Carlo (CTQMC) solver, here we show that the standard implementation of IPT fails away from half-filling when the interaction strength is much larger than the bandwidth. We propose a slight modification to the IPT algorithm that replaces one of the equations by the requirement that double occupancy calculated with IPT gives the correct value. We call this method IPT-$D$. We recover the Fermi liquid ground state away from half-filling. The Fermi liquid parameters, density of states, chemical potential, energy and specific heat on the FCC lattice are calculated with both IPT-$D$ and CTQMC as benchmark examples. We also calculated the resistivity and the optical conductivity within IPT-$D$. Particle-hole asymmetry persists even at coupling twice the bandwidth. Several algorithms that speed up the calculations are described in appendices.Comment: 17 pages, 15 figures, minor changes to improve clarit

Alien Registration- Dyer, Alice M. (Bath, Sagadahoc County)

https://digitalmaine.com/alien_docs/9515/thumbnail.jp