A microcomputer-controlled measuring instrument for phase angle measurement in low frequency range is described. It is based on the digital measurement of the time shift between input signals. To avoid the necessity of calculation of the measured phase shift, measurement of the time shift is repeated during a constant time interval to get the average value of the phase shift independent on the ...

The use of this instrument, utilising galvanic action to indicate the density of massecuite as a guide to crystallization in sugar-boiling vacuum pans and its construction from cheap and readily available materials are enlarged upon. Difficulties experienced in the instrument's successful operation are enumerated and the means of overcoming these are set forth as a guide to present and future o...

INTRODUCTION The objective of this study was to determine whether people with type 1 diabetes are more likely to self-monitor their blood glucose (SMBG) as recommended by their diabetes health care professional using the Accu-Chek Mobile™ (F. Hoffmann-La Roche AG, Basel, Switzerland) monitoring system compared to the Freestyle Optium™ (Abbott, North Chicago, IL, USA). METHODS Thirty-five part...

R eduction of nonrevenue water use is currently a common goal for most water distribution systems. Nonrevenue water consists of water lost either through real losses (e.g., underground leakage) or through apparent losses (e.g., metering inaccuracies and unauthorized use). Reducing the apparent losses caused by meter inaccuracies at low flows can result in substantial short-term increases in uti...

Europe’s smart metering initiative may be the largest engineering project ever undertaken in the region; it is significantly larger than the Channel Tunnel. The European Parliament mandated the replacement of electricity meters with new ‘smart’ meters by 2022, except in Member States who certify this year that it would be uneconomic. This project could cost over $100 billion, and will involve n...

We demonstrate a total charge parity measurement by detecting the radio frequency signal that is reflected by a lumped-element resonator coupled to a single InAs nanowire double quantum dot. The high frequency response of the circuit is used to probe the effects of the Pauli exclusion principle at interdot charge transitions. Even parity charge transitions show a striking magnetic field depende...

Traditionally telemetering systems are based on telephone and similar voice-grade channels. Today new channels such as radio or distribution line carrier (DLC) open new possibilities. The most discussed telecommunication channel is the data highway. It is formed by the combination of cable and of optical fibre networks. In many countries the utilities themselves are involved in the development ...

Today smart meters are increasingly used in worldwide. Smart meters are the advanced meters capable of measuring customer energy consumption at a fine-grained time interval, e.g., every 15 minutes. The data are very sizable, and might be from different sources, along with the other social-economic metrics such as the geographic information of meters, the information about users and their proper...

Investigations of the psychological representation for musical meter provided evidence for an internalized hierarchy from 3 sources: frequency distributions in musical compositions, goodness-of-fit judgments of temporal patterns in metrical contexts, and memory confusions in discrimination judgments. The frequency with which musical events occurred in different temporal locations differentiates...

National Bureau of Standards Gaithersburg, MD 20899 To provide a phase meter calibration service, a phase angle calibration standard has been developed at NBS. This standard is a signal. generator with two sinusoidal outputs and uses direct digital synthesis to generate the signals. The phase angle between the two sinusoids is determined by the input parameters in the calculation of the sets of...