Collective operations on multiple distributed objects are a powerful means to coordinate parallel computations. In this paper we present an inheritance based approach to implement parallel collective operations on distributed object groups. Object groups are described as reusable application-speci c classes that coordinate both operation propagation to group members as well as the global collec...

Based on the light relation between a normal subgroup and a complete congruence relation of a group, we consider the homomorphism problem of rough groups and rough quotient groups and investigate their operational properties. Some new results are obtained.

A one-year prospective survey was conducted to study the incidence of and potential risk factors for farm-related injuries in Eastern Ontario. One hundred and seventeen dairy and beef farms were surveyed using a personal interview. Information was collected on demographic characteristics of the farm owners, workers, and families; characteristics of the farm operations; and information on behavi...

One can notice that if X is a Hausdorff space, then limits of convergent sequences in give us function denoted by lim from the set all to X. This notion has been extended Connor and Grosse-Erdmann an arbitrary linear functional G defined on subspace vector space real numbers. Following this idea some authors have concepts G-continuity, G-compactness G-connectedness topological groups. In paper ...

In this article, we introduce the notion of cycling operations of arbitrary order in Garside groups, which is a full generalization of the cycling and decycling operations. Theoretically, this notion together with other related concepts provides a context in which various definitions and arguments concerning Garside groups are unified and simplified as well as improved. Practically, it yields a...