Band Theory and Boundary Modes of High-Dimensional Representations of Infinite Hyperbolic Lattices.

Periodic lattices in hyperbolic space are characterized by symmetries beyond Euclidean crystallographic groups, offering a new platform for classical and quantum waves, demonstrating great potential for a new class of topological metamaterials. One important feature of hyperbolic lattices is that their translation group is nonabelian, permitting high-dimensional irreducible representations (irreps), in contrast to abelian translation groups in Euclidean lattices. Here we introduce a general framework to construct wave eigenstates of high-dimensional irreps of infinite hyperbolic lattices, thereby generalizing Bloch's theorem, and discuss its implications on unusual mode counting and degeneracy, as well as bulk-edge correspondence in hyperbolic lattices.

Characterization of Double-Strand Break Repair Protein Ku80 Location Within the Murine Retina.

Purpose: To characterize the spatial distribution of the DNA-double strand break-repair protein Ku80 in the murine retina. Even though robust data exist on the complexity of DNA repair mechanisms in dividing cells in vitro, almost nothing is known about it in post-mitotic neurons or photoreceptors (PRs). This knowledge is an important prerequisite for in vivo therapeutic approaches by genome editing in retina and PRs.

Frustrated self-assembly of non-Euclidean crystals of nanoparticles.

Self-organized complex structures in nature, e.g., viral capsids, hierarchical biopolymers, and bacterial flagella, offer efficiency, adaptability, robustness, and multi-functionality.

Shape and size changes of adherent elastic epithelia.

Epithelial tissues play a fundamental role in various morphogenetic events during development and early embryogenesis. Although epithelial monolayers are often modeled as two-dimensional (2D) elastic surfaces, they distinguish themselves from conventional thin elastic plates in three important ways- the presence of an apical-basal polarity, spatial variability of cellular thickness, and their nonequilibrium active nature. Here, we develop a minimal continuum model of a planar epithelial tissue as an active elastic material that incorporates all these features.

Design and implementation of a medical student hazardous materials response team: the Medical Student HazMat Team.

Background: To design and implement a replicable disaster training curriculum for the first on-call medical student hazardous materials response team.

Methods: Twenty-eight first-year medical students participated in a simulated citywide bioterrorism disaster drill. Students were notified of the Code Orange via email, a pager system, and group SMS text message.