Abstract.– This article describes the design, construction and characterization of a digital meter of electric energy based on a microcontroller. The meter carries out the calculation of the demand for the kWh consumption, being based on a staggered rate of domestic type of the Federal Commission of Electricity (C.F.E.) in Mexico. The prototype also presents voltage, current, power and time mea...

In this paper, in order to understand the flow-pipe interaction more clearly, the variations on flow pattern around semi-buried pipelines due to steady current have physically and numerically been investigated. In physical modeling section, the experiments have been carried out in a flume with 10 meter length, 0.3 meter width and 0.5 meter depth using a P.V.C pipe with 6.35 cm in diameter (for ...

I first came to Scripps Institution of Oceanography (SIO) in the summer of 1939, after completing my junior year at the California Institute of Technology. Roger Revelle was 30 years old, with the rank of instructor (long since abolished by the University of California), and a lieutenant junior grade in the Naval Reserve. Roger invited me to come along on an experiment to measure currents in th...

The electric grid in the United States has been suffering from underinvestment for years, and now faces pressing challenges from rising demand and deteriorating infrastructure. High congestion levels in transmission lines are greatly reducing the efficiency of electricity generation and distribution. In this paper, we assess the faults of the current electric grid and quantify the costs of main...