Polymer patterns go square

Antimicrobial graphene polymer (PVK-GO) nanocomposite films.

The first report on the fabrication and application of a nanocomposite containing poly-N-vinyl carbazole (PVK) polymer and graphene oxide (GO) as an antimicrobial film was demonstrated. The antimicrobial film was 90% more effective in preventing bacterial colonization relative to the unmodified surface. More importantly, the nanocomposite thin film showed higher bacterial toxicity than pure GO-...

Disclinations in square and hexagonal patterns.

We report the observation of defects with fractional topological charges (disclinations) in square and hexagonal patterns as numerical solutions of several generic equations describing many pattern-forming systems: Swift-Hohenberg equation, damped Kuramoto-Sivashinsky equation, as well as nonlinear evolution equations describing large-scale Rayleigh-Benard and Marangoni convection in systems wi...

Learning Patterns in the Game of Go

This thesis introduces concepts for learning expert human positional classifiers in the game of Go. While most studies in the field of Go focus on learning methods to find the best move, this thesis focuses on learning methods for evaluating the quality of Go stones in a position. A data set of 2,638 Go Tesuji problems has been created. For these problems expert human classifiers have been reco...

Go patterns generated by retrograde analysis

1. Introduction Retrograde analysis is a qualification and generation technique of positions in two-player, complete information games. In Chess [Thomson 1986], retrograde analysis enabled researchers to generate all six-piece positions [Thomson1996] and most of seven-or-eight-piece positions, retrograde analysis was used to solve these games.

Nonlinear square patterns in Rayleigh-Bénard convection