Formation of Labyrinth Patterns in Langmuir Films

A Langmuir film is a molecularly thin fluid layer on the surface of a subfluid. When dipole dipole forces are negligible, bounded films relax to energy minimizing circular domains. We investigate numerically the case where dipole dipole interactions are strong enough to deform the domain into highly distorted labyrinth type patterns. Our numerical method is designed to achieve higher accuracy and better stability than previous work and exploits an analytic formulation that removes a singularity in the dipole dipole forces without resorting to a small cutoff parameter. We calculate the relaxation rates for a linearly perturbed circular domain, and we verify them numerically. We are also able to numerically reproduce experimentally observed circle to dogbone transitions with minimal area loss

Further Evidence You Are a Changeling

pages 25-2

What Happens to Class When a Language Dies? Language Change vs. Language Death

This paper presents the first documentation of the noun class system of the dying language Mani (buy), Bullom So in Ethnologue, a.k.a. Mmani, Mandenyi, etc. spoken in Guinea and Sierra Leone. Mani has some few hundred speakers, all of whom speak either Soso (sus) or Temne (tem) as their everyday language. The Mani are concentrated in a restricted coastal area straddling the border between Guinea and Sierra Leone near the town of Morebaya, Kambia District, in Sierra Leone. A few other speakers are scattered in the littoral region from Conakry to Freetown

First Questions for Joe Braima

Although this audio recording is titled First questions for Joe Braima, it appears to be instead a continuation of the converation between Tomi Lahai and Tommy Jaba (see https://archives.pdx.edu/ds/psu/29875 for this earlier conversation). The conversation in this recording centers around the Kim language

Boyo Bangoura Before and After Marriage

Interview audio and transcripts of Boyo Bangoura from Caton describing her upbringing in Caton and subsequent and marriage