Airborne sampling of aerosol particles: Comparison between surface sampling at Christmas Island and P-3 sampling during PEM-Tropics B

Sampling for Airborne Radioactivity

This report examines how to sample airborne radioactivity with minimal complexity and time expenditure, using conventional high-volume samplers in combination with alpha-particle spectrometry. The use of alpha spectrometry provides compensation for radon/thoron decay products collected on the filter paper of the sampler, leading to a seven-fold improvement in measurement sensitivity of artifici...

Sampling For Airborne Radioactivity

As the nation's industrial complex grows, one of its attendant evils—environmental pollution—grows apace. Perhaps no segment of this complex grows more rapidly at present than the atomic energy industry. Responsible officials are gradually becoming aware of the potential for pollution of this new giant. The problem is complicated by security requirements and by virtue of the inability to sense ...

Characterization of Individual Aerosol Particles and Sampling Artefacts by Nanosims

Atmospheric and work place aerosol particles are frequently heterogeneous on a nanometer scale (e.g., Ebert et al., 2002; Weinbruch et al., 2002). Up to now, these heterogeneities could only be studied by transmission electron microscopy (TEM). Recently, secondary ion mass spectrometry (SIMS) was extended to the nanometer scale, making this new technique (NanoSIMS) a very attractive tool for th...

Comparison of Complications of Chorionic Villus Sampling and Amniocentesis

Application of adaptive sampling in fishery part 1: Adaptive cluster sampling and its strip designs

Abstract:  The precision of conventional sampling designs is not usually satisfactory for estimating parameters of clump and rare populations. Many of fish species live in school and disperse all over a vast area like a sea so that they are rare compare to their habitats. Theory of a class of sampling designs called adaptive sampling designs has rapidly grown during last decade which solv...