DCAC is a practical OS-level access control system that supports application-defined principals. It allows normal users to perform administrative operations within their privilege, enabling isolation and privilege separation for applications. It does not require centralized policy specification or management, giving applications freedom to manage their principals while the policies are still en...

This article identifies the leaders, the supporters and the resisters of public service reform. It adopts a principal–agent framework, comparing reality with an ‘ideal’ situation in which citizens are the principals over political policymakers as their agents, and policy-makers are the principals over public service officials as their agents. Reform in most developing countries is complicated b...

Leadership style has always been a controversial topic in educational administration and management. Following the recommendation of the Education Commission to introduce schoolbasedmanagement (SBM) into Hong Kong schools in the early 1990s, discussions about the kind of leadership style that is appropriate for SBM schools have never ceased. The government holds a continuing belief that SBM sch...

The dual class shareholding company has been adopted as a way of managing the single desk operating system for wheat in Australia. Using B Class ASX listed shares to fund the operation of the company, and the use of A Class grower held shares to control the direction of the company, the objectives of the current arrangements are to maximise net pool returns to growers. Using principal-agent the...

FACULTY OF ENGINEERING AND APPLIED SCIENCE DEPARTMENT OF ELECTRONICS AND COMPUTER SCIENCE Doctor of Philosophy by Ehab M. ElSalamouny One of the dominant properties of a global computing network is the incomplete information available to principals about each other. This was the motivation of using the notion of probabilistic trust as an approach to security sensitive decision making in modern ...