منابع مشابه
Embedded Firmware Diversity for Smart Electric Meters
Smart meters are now being aggressively deployed worldwide, with tens of millions of meters in use today and hundreds of millions more to be deployed in the next few years. These low-cost (' $50) embedded devices have not fared well under security analysis: experience has shown that the majority of current devices that have come under scrutiny can be exploited by unsophisticated attackers. The ...
متن کاملUltrasonic Sensing for Water Flow Meters and Heat Meters
Ultrasonic flow meters are gaining wide usage in commercial, industrial and medical applications. Major benefits of utilizing this type of flowmeter are higher accuracy, low maintenance (no moving parts), noninvasive flow measurement, and the ability to regularly diagnose health of the meter. This application note is intended as an introduction to ultrasonic time-of-flight (TOF) flow sensing us...
متن کاملOne hundred meters.
To walk 100 meters at 4 kilometers per hour (an average walking pace) takes about 1.5 minutes. What would prevent an oncologist investing this brief time in visiting a patient in the next building? It is not that oncologists as a group are uncaring. I can think of too many examples where the opposite is true. Was he too busy? Was he burned out? Did he feel guilty at having failed to control the...
متن کاملUse case 1: Stopped-meters
Problem definition: A stopped-meter is a meter that reports zero during a predefined period of time. The zero report can occur for two reasons: either the meter is faulty or else there is legitimate zero-consumption in the property. The usual solution is to send a technician after a predefined period of time, but the problem is how to determine the optimum period of time. If the period is too s...
متن کاملThe Transatlantic on 2200 Meters
here has been much excitement below our so-called top band at 1.8 MHz. At less than one-tenth this frequency, near 136 kHz, you will find many amateurs enjoying QSOs using a variety of modes. Although US and Canadian amateurs need special permission to transmit here, there is a 2200 meter amateur band in many European countries and in New Zealand. Aside from its low frequency, the most striking...
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ژورنال
عنوان ژورنال: Transactions of the American Institute of Electrical Engineers
سال: 1891
ISSN: 0096-3860
DOI: 10.1109/t-aiee.1891.5570152