On the pyrotechnic ignitors role in dust explosion testing: Comparison between 20 L and 1 m 3 explosion vessels

Explosion dust particle size measurements.

In situ measurements of the sizes and concentrations of dust particles generated by the detonation of high explosives in clay soil near Leesville, La., sandy clay soil near Huntsville, Ala., and sandy soils near Orogrande, N.M. are reported. Measurements were generally made within 1 m of the surface (in one case 10 m) at distances ranging from 10 to approximately 50 m from the detonation point ...

Dust Explosion Propagation: Myths and Realities

Overall characterization of cork dust explosion.

Explosibility and ignitability studies of air/cork dust mixtures were conducted in a near-spherical 22.7 L explosibility test chamber using pyrotechnic ignitors and in a furnace of 1.23 L. The suspension dust burned as air-dispersed dust clouds and the uniformity of the dispersion inside the chamber was evaluated through optical dust probes. The range of tested particle sizes went from a mass m...

Role Explosion: Acknowledging the Problem

In large enterprises subject to constant employee turnover and challenging security policies, the administration of Role-based Access Control (RBAC) is a daunting task that is often highly centralized in a small team of security administrators. The aim of this work is to determine why existing models for Administrative Role-based Access Control (ARBAC) have failed to achieve success and thus mo...

Handling combinatorial explosion in software testing

In this thesis, the overall conclusion is that combination strategies, (i.e., test case selection methods that manage the combinatorial explosion of possible things to test), can improve the software testing in most organizations. The research underlying this thesis emphasizes relevance by working in close relationship with industry. Input parameter models of test objects play a crucial role fo...