ADEON Calibration and Deployment Good Practice Guide

The objective of this document is to provide information to future field scientists who wish to deploy instruments similar to those used in the ADEON project. The scope of these descriptions are limited to the specific instruments used in the ADEON project, however much of the information will be useful regardless of the system manufacturer

Pinch-off of rods by bulk diffusion

The morphology of a rod embedded in a matrix undergoing pinching by interfacial-energy-driven bulk diffusion is determined near the point of pinching. We find a self-similar solution that gives a unique temporal power law and interfacial shape prior to pinching and self-similar solutions after pinching. The theory is compared to experiments that employ in situ four-dimensional X-ray tomographic microscopy for rods of liquid or solid pinching by solute diffusion in the high-diffusivity liquid phase. The excellent agreement between experiment and theory confirms that the interfacial morphology near the singularity is universal both before and after pinching; the shape holds regardless of the material system and initial condition. This also implies that the predictions of the time-dependence of the process can be used to determine the time to pinching for a wide variety of physical systems, and thus provide estimates of the time required for capillarity-driven break-up of microstructures from the detachment of secondary dendrite arms to polymer blends

Underwater Soundscape and Modeling Metadata Standard

A lack of globally applied standards for underwater acoustic measurements (soundscapes) means that different researchers make different choices for frequency ranges and time averaging windows, often referring to the resulting plethora of different quantities with identical names, making it difficult, and sometimes impossible, to compare like with like.<div><br></div><div>This document, the ADEON Underwater Soundscape and Modeling Metadata Standard, is the first of five standardization products. Its purpose is to specify a minimum metadata standard for measured and predicted OCS soundscapes in the US EEZ. It is intended to be used as a tool to facilitate direct comparisons between soundscapes reported by different projects. Compliance with this standard in no way precludes calculation of metrics not specified by the standard or of the same metrics in different frequency bands or averaging intervals.<br></div