Constellations and hypermaps generalize combinatorial maps, i.e. embedding of graphs in a surface, in terms of factorization of permutations. In this paper, we extend a result of Jackson and Visentin (1990) on an enumerative relation between quadrangulations and bipartite quadrangulations. We show a similar relation between hypermaps and constellations by generalizing a result in the original p...

SUMMARY Holt Oram Syndrome consisting of upper limb defcts, cardiac anomalies and narrow shoulder, was first described by Holt and Oram in 1960. The inheritance pattern is autosomal dominant and most commonly encoutered cardiac anomalies being ASD, although all variaties of C.H.D are reported. Upper limb anomalies are not specific, although scaphoid bone deformity is almost characteristic in t...

Cultural astronomy reveals ways in which perception and culture have shaped the interpretation of night sky.

Abstract Highlighting several theoretical and empirical contributions of the preceding chapters, epilogue presents a relational typology for understanding roles different types resources civil society organizations. This chapter explores variations in generalizability/specificity convertibility economic, symbolic, human suggests approaching as landscape organizations that coexist but have origi...

This research paper presents an initial attempt to introduce and explain the emergence of new phenomenon, which we refer to as platform constellations. Functioning as highly modular systems, the platform constellations are collections of highly connected platforms which co-exist in parallel and as such allow us to study platforms not only as separate entities, but also to investigate the relati...

We propose new unitary space-time constellation designs with high diversity products. Our Hamiltonian and product constellations are based on Slepian’s group codes, and can be used for any number of transmitter antennas M and any data rate R. Our Hamiltonian constellations achieve the theoretical upper bound of diversity product in the case where M is even and the cardinality of the signal cons...

The study of astronomy, as an important part of any science education programme, provides our students with insights into more than just the cosmos. It may also serve as a mechanism to link them to other natural and social sciences. This article examines equally valid interpretations of the constellation Canes Venatici as an example of how the study of astronomy may serve this multidisciplinary...