We study the evolution of altruism in one- and two-dimensional stepping-stone populations with discrete overlapping generations. We find that increasing survival probability facilitates the evolution of altruism, in agreement with recent results for a patch-structured population. We allow the altruistic behaviour to affect either fecundity or survival probability. In the first case, altruism is...

Effective SDN control relies on the network data collecting capability as well as the quality and timeliness of the data. As open programmable data plane is becoming a reality, we further enhance it with the support of runtime interactive programming in order to cope with application dynamics, optimize data plane resource allocation, and reduce control-plane processing pressure. Based on the la...

Historically, story understanding systems have depended on a great deal of hand-crafted knowledge. Natural language understanding systems that use conceptual knowledge structures [Schank and Abelson, 1977; Cullingford, 1978; Wilensky, 1978; Carbonell, 1979; Lehnert, 1981; Kolodner, 1983] typically rely on enormous amounts of manual knowledge engineering. While much of the work on conceptual kno...

We propose a “Step-Function” method to detect network attackers from using a long connection chain to hide their identities when they launch attacks. The objective of the method is to estimate the length of a connection chain based on the changes in packet round trip times. The key point to compute the round trip time of a connection chain is to match a Send and its corresponding Echo packet. W...

The “New Economy” is the most virulent part of the Knowledge-Based Economy. It is an important stepping-stone towards it. For this reason, many people wrongly believe that the “New Economy” is already the next stage of the economy. The New Economy is very visible, but so far it is still only a small part of the total economy. Nevertheless, there is no part of the economy that will remain untouc...

“Cloud computing” is the new buzz term in the IT industry. Many practitioners have already adopted the technology or are in the process of adopting it. Yet, there is no methodological research investigating the adoption process. This paper reviews articles and interviews published mostly in practitioner journals to develop a theoretical framework that help us to better understand the cloud comp...