Award Data

In our Phase 1 work we were able to replicate and build on recent results at NIST with superconducting transition (SCT) thermometers, which suggested that dramatic improvements may be achieved in detectivity and range of application, of cryogenic electrical substitution radiometers. Cryo-ESR's are widely used as the most accurate absolute standards of radiative flux and irradiance. In Phase 2, we ...

The measurement and quality control for smooth engineering surfaces are becoming more and more important in modern science and technology due to their important engineering functions and high production costs. NIST has frequently received requests for U.S. industry to provide Standard Reference Material (SRM) high-precision, random profile roughness specimens to support smooth surface measurements ...

Severe weather impacts our daily lives, society and the world economy. From an average of $10B annual loss due to tropical cyclones since 1900 to $200B in the commercial shipping industry, which is threatened by severe ocean storms to the hundreds of lives and assets lost in the $20B recreational boating industry. In these cases and many more, accurate now casting and forecasting could prevent the ...

Critical issues associated with the design of a rugged, compact "real time" sampling system using photoconductive switches as the signal generator and sample will be investigated. The design concept is based upon an optoelectronic equivalent time sampling principle developed by the Principal Investigator. It involves first the phase locking of the temporal waveform to be measured to the optical pu ...

The research proposed herein in intended to solve two problems, namely (1) to define a specification framework for access control policies that enables policy composition for both centralized and distributed systems in a precise and systematic manner, and (2) to explore the impact of different security architectures on policy composition. Although most commercial systems support applications that ...

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The objective of this research project is the development of an Autonomous Microbial Sampler (AMS) that will obtain uncontaminated and exogenous DNA-free microbial samples from deep-sea hydrothermal vents and other aquatic ecosystems. Sampling with the AMS may be conducted using manned submersibles, Remotely Operated Vehicles (ROV), Autonomous Underwater Vehicles (AUV) or during hydrocast operatio ...

The topic (8.2.2R) requires the capability for enabling high sensitive/high precision measurements of calcium concentrates in seawater. The proposal aims to demonstrate the feasibility of a novel high sensitive nanosensor that can be used to determine very low concentrations of calcium in seawater in the presence of large backgrounds calcium concentration. The sensor approach will use the benefi ...

Bacterial pathogens in salmonids, such as Renibacterium salmoninarum and Aeromonas salmonicida, are difficult to identify by conventional diagnosis due to their extremely slow growth and the absence of an efficient selective medium. Diseases caused by these pathogens represent a serious problem both in the fishing industry and for conservation efforts. While several PCR-based assays appear to be u ...