Journal of Research of the National Institute of Standards and Technology articles from September 2005

Journal of Research of the National Institute of Standards and Technology archives from September 2005

Temperature dependence of the Hall and longitudinal resistances in a quantum Hall resistance standard.
September 1, 2005... We present detailed measurements of the temperature dependence of the Hall and longitudinal resistances on a quantum Hall device [(GaAs(7)] which has been used as a resistance standard at NIST. We find a simple power law relationship between...

The "median" method for the reduction of noise and trigger jitter on waveform data.
September 1, 2005... The "median" method for the reduction of the effect of noise and trigger jitter on waveform data is described. The effectiveness of this method was examined using simulations and experiments and for typical jitter and noise observed in...

Developing a more rapid test to assess sulfate resistance of hydraulic cements.
September 1, 2005... External sulfate attack of concrete is a major problem that can appear in regions where concrete is exposed to soil or water containing sulfates, leading to softening and cracking of the concrete. Therefore, it is important that materials...

Chemistry of silanes: interfaces in dental polymers and composites (1).
September 1, 2005... The performance and service life of glass- or ceramic-filled polymeric composites depend on the nature of their resin, filler and interfacial phases as well as the efficacy of the polymerization process. The synergy that exists between the...