Abstract Recent years have seen a dramatic increase in existence results for tdesigns with large t, i.e. t ≥ 5. Designs are now known to exist for several thousand parameter sets, mostly constructed by the method of orbiting under a group. This note is a contribution to the classification of these designs by parameters. We take an abstract look at admissible parameter sets in general. We introd...

The available amino acid sequences of peptidases have been examined, and the enzymes have been allocated to evolutionary families. Some of the families can be grouped together in 'clans' that show signs of distant relationship, but nevertheless, it appears that there may be as many as 60 evolutionary lines of peptidases with separate origins. Some of these contain members with quite diverse pep...

To gain insight into the social organization of a population associated with the Dawenkou period, we performed ancient DNA analysis of 18 individuals from human remains from the Fujia site in Shandong Province, China. Directly radiocarbon dated to 4800-4500 cal BP, the Fujia site is assumed to be associated with a transitional phase from matrilineal clans to patrilineal monogamous families. Our...

A. Expressive. Only naturally, coherent specifications must be based on an appropriate set of underlying abstractions [2]. The commonly accepted ontology (originally set forth in [1] and later developed in [3]) primarily consists of components, which are loci of data and computations, and connectors, which are means for transferring data and control between components. In the case of object-ori...

In this paper we show that there are several other structures that arise from the functions associated with the maximal arcs of Mathon type. So it is shown that maximal arcs of Mathon type are equivalent to additive partial flocks of the quadratic cone in PG(3, q) and to additive partial q-clans. Further they yield partial ovoids of Q(5, q), partial spreads of lines of PG(3, q), translation k-a...

Tes kystes du grand Epiploon sont assez rares, ct es lymphangiomies kystiques de grand epiploon asscz exceptionnelles.Le coutenu de ces kystes lymphatiques peuvent etres soit sereux soit chyleux.  Au point de vue pathogenic, Ladd et Gross pell­sent que ces kystes proviennent de l'isolemcnt ct du tlevelopement d'un ou plusieurs kystes lymphatiquc, primitifs.  Dans !'observation que nous prcsen...

The concept of presence is commonly related to whether or not a user feels, acts, and reacts as if he/she were in a real familiar environment when using a virtual reality (VR) application. Understanding the neural correlates of presence may provide a foundation for objective measurements and important constraints for theoretical explanations. Here, we focus on the importance of expectations and...