Publish-Subscribe is a paradigm that is recently receiving increasing attention by the research community, mainly due to its information oriented nature. Although the publish-subscribe paradigm yields significant security advantages over the traditional send-receive one, various security and privacy challenges are raised when it comes to the design of an internetworking architecture that is sol...

Introduction Groundwater supply sustainable yield is herein defined as how much water can be withdrawn from an aquifer system, where and for how long, with acceptable physical, economical, environmental, social, cultural, institutional, and legal consequences. The purpose of this Technical Commentary is to focus on the following technical aspects of groundwater supply sustainable yield that are...

Previous research by the authors has led to an IT security model of a single organization. In this research we develop an overall scheme to model the security risk of organizations in a supply chain and propose how to optimize the supply chain. The ultimate goal is to show how other organizations in the chain can be affected by a single organization’s behavior, and whether the costs of providin...

The control of information flow and their security are of great importance to organizations participating in the global supply chain. Significant gap exists in the research literature on supply chain information security (SCIS). Based on literature review, the paper suggests a framework highlighting the issues that demands attention for securing inter-organizational information flows in the glo...

Water supply system is socially, politically, and financially critical, and long term security of water supply has to be met in spite of the huge uncertainty in its operation decades since the time of design. Everyone concerned with architecting such a system faces a common challenge: how do we design a system to perform well in a constantly evolving and thus risky context? As one of the water-...

Aspect-oriented programming (AOP) has been touted as a promising paradigm for managing complex softwaresecurity concerns. Roughly, AOP allows the security-sensitive events in a system to be specified separately from core functionality. The events of interest are specified in a pointcut. When a pointcut triggers, control is redirected to advice, which intercepts the event, potentially redirectin...

Household food security remains a challenge in South Africa. The national government instituted the Integrated Food Security Strategy (IFSS) programme which identifies household agricultural production as an important element of improving household-level food security. Agricultural extension is well positioned to help achieve this aim, but its current contribution is unknown. This study identif...

We use factor analysis to derive a robust measure of religiosity from items reported in five waves of the World Value Survey. Our measure of religiosity is negatively correlated with per capita income. Development apparently causes religiosity to fall to about half its pre-modern level. Most components of the demand for religion are reduced by development. The supply of religion declines once c...