This paper evaluates the performance of COPS over secure TLS and IPsec connections. For large size data, when we apply authentication and encryption, the throughput degrades compared with the throughput without authentication or encryption. COPS has native security mechanisms, but it also has limitations. As defined in RFC 2478, COPS includes no standard key management and no data privacy hop-b...

We determine the cop number of the hypercube for different versions of the game Cops and Robber. Cops and Robber is a two player game played on an undirected graph. One player controls some number of cops; the other player controls a single robber. In the standard game, the cops first choose some vertices to occupy, then the robber chooses a vertex; the players then alternate turns. On a turn, ...

We consider the effect on the length of the game of Cops and Robbers when more cops are added to the game play. In Overprescribed Cops and Robbers, as more cops are added, the capture time (the minimum length of the game assuming optimal play) monotonically decreases. We give the full range of capture times for any number of cops on trees, and classify the capture time for an asymptotic number ...

In the ordinary version of the pursuit-evasion game cops and robbers, a team of cops and a robber occupy vertices of a graph and alternately move along the graph’s edges, with perfect information about each other. If a cop lands on the robber, the cops win; if the robber can evade the cops indefinitely, he wins. In the variant lazy cops and robbers, the cops may only choose one member of their ...

Purpose – This paper proposes defining a methodology of cultivation and integration of communities of practices (CoPs) and to create an evaluation model in organizations. Design/methodology/approach – This research project was based on a qualitative case study design, with main units of analysis being CoPs. The objective was achieved developing an analysis model of CoPs based on the key dimensi...

BACKGROUND Virtual Communities of Practice (CoPs) are flexible communication and knowledge management tools enabling collaboration, sharing of best practice and professional development. There have been few studies that have looked at the use and usefulness of virtual CoPs in public health. METHODS This project sought to gather the evidence and develop recommendations for the value of virtual...

Communities of Practice (CoPs) provide a good medium for effective utilization of knowledge workers and group innovation in an organization. It is also an organizational instrument for developing competitive advantage based on chosen business strategy. For effective operation of CoPs and utilization of organizational resources business strategy and knowledge sharing attributes of knowledge work...