The goal of this research was to create a decentralized trust-based access control (TBAC) system for a dynamic collaborative environment (DCE). By building a privilege management infrastructure (PMI) based on trust, user access was determined using behavior grading without the need for pre-configured, centrally managed role hierarchies or permission sets. The PMI provided TBAC suitable for depl...

The effect of antifoaming agents on the foamability of sodium dodecyl sulfate (SDS) solutions was investigated and correlated with their effect on the micellar relaxation time τ2. The slow micellar relaxation time τ2 of SDS micelles, which is directly related to micellar stability, was determined by the pressure-jump method in the presence of the antifoaming agents 2-ethylhexanol (EH), tributyl...

This paper describes an extension of the Java language that provides “programmable security.” The approach augments the Java syntax with constructs for specifying various access control policies for Java packages, including DAC, MAC, RBAC and TBAC. A primitive ticket based mechanism serves as the foundation for programmable security. The implementation incorporates a preprocessor for language t...

The importance of risk in trust-based systems is well established. This paper presents a novel model of risk and decision-making based on economic theory. Use of the model is illustrated by way of a collaborative spam detection application.

The migration of various plastic additives (antioxidants: BHT, Ionox 220, Irgafos 168; UV absorber: Uvinul 3039; plasticizers: TBAC and TOTM) from polypropylene polylactic acid was investigated in a series experiments conducted over period 13 days. As fatty food simulants, both ethanol 95 v/v% isooctane were used. Non-Fickian behaviour observed on multiple occasions. kinetic curves concentratio...