We continue the study of cellular automata (CA) directional dynamics, i.e. the behavior of the joint action of CA and shift maps. This notion has been investigated for general CA in the case of expansive dynamics by Boyle and by Sablik for sensitivity and equicontinuity. In this paper we give a detailed classification for the class of additive CA providing non-trivial examples for some classes ...

This Journal Article is brought to you by the Faculty of Humanities and Social Sciences at ePublications@bond. It has been accepted for inclusion in Humanities & Social Sciences papers by an authorized administrator of ePublications@bond. For more information, please contact Bond University's Repository Coordinator. Recommended Citation Generos Ortet, Manuel I. Ibanez, Micaela Moro, Fernando Si...

This paper examines the marriage tax paid by couples in 2000 using the U.S. Census data from that year. The U.S. Census data allows the study to focus on cohabiting and married couples, and ignore individuals, to overcome the inaccuracies that can result when the income of a potential spouse for an individual must be estimated. The marriage tax for couples is calculated and examined. Then, the ...

While numerous studies have compared urban and rural fertility rates across Europe, virtually no studies have distinguished suburbs as a distinct residential context. This study examines fertility variation across different residential contexts in four Northern European countries: Denmark, Finland, Norway and Sweden. We move beyond the conventional urban-rural focus of most previous studies of ...

MIT Student Professor David Jones & Professor David Kaiser STS.003 The Rise of Modern Science Paper 1 Alchemy & Chemistry; A Rose by Any Other Name. Most people today consider alchemy to be some sort of archaic black art; sorcerers working in secret chambers to transmute lead into gold. Chemistry, on the other hand, is regarded as one of the most important branches of experimental science. Is t...

Together with M. Boyle and D. Huang (2000), this paper gives an alternate development of the Huang classification of shifts of finite type up to flow equivalence, and provides additional functorial information, used to analyze the action of the mapping class group of the mapping torus of a shift of finite type on the “isotopy futures” group, which is introduced here. For a shift of finite type ...