With increased use of composite materials in critical structural applications it is more important than ever to independently assure structural integrity. Complexity of the advanced composite materials including layered and bonded structures represents challenges in developing optimized ultrasonic tests. Traditional ultrasonic NDT methods are inappropriate and often misleading when applied to a...

The development of the multi-collector ICP-MS has provided a wider range of isotopic systems (e.g. Li, Mg, Fe, Cu, Hf, Tl) that can used to place constraints on the timing of mantle metasomatism and better characterize metasomatic processes. Associated with the application of these isotopic systems has been the parallel development of in-situ isotope analysis using a laser ablation microprobe a...

A Monte-Carlo simulation is used to determine the effects of limited time resolution on means and standard deviations of measured movement times in a specific experimental situation. Of special interest is the question whether detection of experimental effects depend on the magnitude of the measured means and standard deviations or on the number of repeated measurements. The simulation shows th...

Models with dark energy decaying into dark matter have been proposed to solve the coincidence problem in cosmology. We study the effect of such coupling in the matter power spectrum. Due to the interaction, the growth of matter density perturbations during the radiation dominated regime is slower compared to non-interacting models with the same ratio of dark matter to dark energy today. This ef...

Measurments with combination pH electrodes of the pH of the dilute buffers used in a commercial kit (CEA-Roche) for assay of carcinoembryonic antigen resulted in pH values 0.1 to 0.3 unit lower than pH values measured on an electrode system with a capillary junction. If the pH values of these buffers were adjusted, based on such measurements, an error in the assay of 0.2 to 0.6 ng/ml in the 1.5...

We propose a new energy-based ([1]) online learning approach to the problem of extracting small features from high dimensional, noisy datasets. We demonstrate the power of this new technique by applying it to the Detection of cellular nuclei in large hyperspectral images. Thus, we prove that only a minimum number of random, wideband measurements is necessary to achieve efficient feature extract...

The application of reach-through avalanche photodiodes (R’APD) as a photodetector for scintillator tiles has been investigated. The light collected by WLS fibers (0.84mm and 1mm diameter) embedded in the scintillator has been transmited to the 0.5mm active surface of APD by clear optical fibers and optical connectors. A low noise charge sensitive preamplifier (≈ 400e− equivalent noise charge) h...