Multivariate kernel density estimation provides information about structure in data. Feature significance is a technique for deciding whether features – such as local extrema – are statistically significant. This paper proposes a framework for feature significance in d-dimensional data which combines kernel density derivative estimators and hypothesis tests for modal regions. For the gradient a...

Delamination is considered for thin elastic 'lms that are bonded to cylindrical substrates and subject to an equi-biaxial compressive pre-stress. Results for both positive and negative curvatures are obtained. The 'lm buckles or de2ects (depending on the sign of the curvature) away from the substrate inducing mixed mode stress intensities at the edge of the delamination. The energy release rate...

The performance of vibration-based damage identification techniques for current condition evaluation of existing bridges is studied through their application to dynamic response of an existing concrete bridge. First, in situ dynamic tests were performed and modal parameters (mode shapes and frequencies) were identified. As previous sets of in situ dynamic parameters were not available, the refe...

The effect of flexibility and initial curvature of moving plates in parallel-plate MEMS capacitors are investigated. A parallel-plate-based MEMS tunable capacitor with extended tunability and linear capacitance-voltage (C-V) response is introduced. The design combines the flexibility and curvature of the electrode with an array of mechanical stoppers to increase the overall stiffness of the dev...

High-resolution microscopy techniques such as electron microscopy, scanning tunnelling microscopy and atomic force microscopy represent well-established, powerful tools for the structural characterization of adsorbed DNA molecules at the nanoscale. Notably, the analysis of DNA contours allows mapping intrinsic curvature and flexibility along the molecular backbone. This is particularly suited t...

The new training literature suggests that in a monopsonistic market employers will not only pay for fi rm-specifi c training but also for general training if the risk of poaching is limited. This implies that training participation should decrease when competition for employees is higher among fi rms. Using worker level data for Germany we fi nd that the hypothesis is supported empirically. Spe...