The equivalence between quasi-unit-cell models and Penrose-tile models on the level of decorations is proved using inflation rules for Gummelt coverings with decorated decagons. Owing to overlaps, Gummelt arrangement of decorated decagons gives rise to nine different (context-dependent) decagon decorations in the covering. The inflation rules for decagons for each of nine types are presented an...

F ore-edge decorations on manuscripts date back to the 10th century. Decorations can be seen when the book is lying on its side, a custom of the 15th and 16th centuries, and should not be confused with fore-edge paintings. Fore-edge paintings are not visible when the book is closed, but when the leaves are slanted or fanned, a beautiful miniature landscape appears. Fore-edge paintings are usual...

In recent years, a number of authors have started studying Aristotelian diagrams containing metalogical notions, such as tautology, contradiction, satisfiability, contingency, strong and weak interpretations of (sub)contrariety, etc. The present paper is a contribution to this line of research, and its main aims are both to extend and to deepen our understanding of metalogical diagrams. As for ...

URM (Unreinforced Masonry) historic buildings can be generally arranged into three categories: adobe, brick and stone masonry. However, a common feature of URM structures is typically the low mechanical properties of the masonry material, especially in terms of shear strength. URM buildings are not amenable to seismic analysis, and the relatively low strength of stone and brickwork masonry ofte...

10. Honours and Rewards.? It lias sometimes been alleged that the number of Honours and Decorations bestowed upon officers of the I. M. S. is small. The following table shows that members of the service, on the active list or retired, have been the recipients of close upon 200 decorations. The larger share, nearly two-thirds of the whole, have gone to Bengal ; but that service has always been s...

Using a simple synthetic protocol, heterohexacene analogues with a quadrupolar distribution of partial charges are readily available. In contrast to most other acenes, these compounds crystallize with a slipped-stack, brickwork-like packing which is mainly controlled by electrostatic interactions. This type of packing offers an advantage for organic semiconductors, because it allows more isotro...