منابع مشابه
Some memories of Cy Derman
I came to Columbia in 1968 as an undergraduate in the engineering school. I didn’t know what I wanted to major in, and declared an interest in nuclear engineering, so that I could take as many physics courses as I wanted. But the summer after my freshman year I took a summer job in Washington D.C. at an Army lab for which I had qualified by taking a civil service exam. They had an OR group, and...
متن کاملMetrological Timelines in Traceability
There is a growing requirement for an internationally accepted system of recognition of measurement capabilities and relationships within and among countries, to facilitate seamless global commerce and trade. As a result, metrologists worldwide have recently developed increased interest in the concept and definition of traceability. Classically, traceability provides a way of relating the resul...
متن کاملMetrological Reliability of Medical Devices
The prominent development of health technologies of the 20 century triggered demands for metrological reliability of physiological measurements comprising physical, chemical and biological quantities, essential to ensure accurate and comparable results of clinical measurements. In the present work, aspects concerning metrological reliability in premarket and postmarket assessments of medical de...
متن کاملThe Quantum Metrological Triangle Experiment
We present our experimental set-up and discuss the results obtained with the quantum metrological triangle (QMT) experiment. This experiment consists in realizing Ohm's law with the three effects used and investigated in quantum electrical metrology: the Josephson effect (JE), the quantum Hall effect (QHE) and the single electron tunneling effect (SET). The aim is to check the consistency of th...
متن کاملAbout traceability of the biochemical measurement results – some case studies on the metrological and practical aspects
The comparability of biochemical measurement results performed by any medical laboratories could be reached only when common reference systems can be established for worldwide use. There is recognised a critical step in the reference systems to achieve traceability of values obtained using reference measurement procedures and reference materials traceable to the universally recognized and accep...
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ژورنال
عنوان ژورنال: Journal of the Franklin Institute
سال: 1918
ISSN: 0016-0032
DOI: 10.1016/s0016-0032(18)90849-5