LEAK TESTS

Numerical modelling of concentrated leak erosion during Hole Erosion Tests

This study focuses on the numerical modelling of concentrated leak erosion of a cohesive soil by a turbulent flow in axisymmetrical geometry, with application to the Hole Erosion Test (HET). The numerical model is based on adaptive remeshing of the water/soil interface to ensure accurate description of the mechanical phenomena occurring near the soil/water interface. The erosion law governing t...

Pulmonary Capillary Leak Syndrome

Robust Leak Tests for Transmission Systems Using Nonlinear Mixed-E↵ect Models

Problem: Leakage of the transmission fluid or oil in powertrain systems (i.e., transmissions, cylinder heads, engine blocks, etc.) can cause engine overheating and/or permanent damage. Therefore, it is crucial to run a leak test to inspect for any possible porosity in the casting parts. However, the inspection results for the amount of leakage at given testing times are sensitive to the tested ...

Does My Device Leak Information? An a priori Statistical Power Analysis of Leakage Detection Tests

The development of a leakage detection testing methodology for the side-channel resistance of cryptographic devices is an issue that has received recent focus from standardisation bodies such as NIST. Statistical techniques such as hypothesis and signi cance testing appear to be ideally suited for this purpose. In this work we evaluate the candidacy of three such detection tests: a t-test propo...

Leak link

a majority of people, asked a simple yes/no question, were indeed opposed to the creation of animalhuman hybrids. However (in line with similar surveys on animal experimentation) support for the procedure rose to 61 per cent when the potential benefits of the work were explained. Announcing the eventual decision in September, the HFEA emphasised the importance of this public support – which res...