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SANDIA WEIGHS IN ON NEW DEFINITION FOR KILOGRAM
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The U.S. Department of Energy's Sandia National Laboratories issued the following press release:
The kilogram is losing weight and many international scientists, including some at Sandia National Laboratories, agree that it's time to redefine it.
Scientists are hoping to redefine the kilogram by basing it on standards of universal constants rather than on an artifact standard.
The International Prototype Kilogram (IPK) or "Le Grand K," made in the 1880s, is a bar of platinum-iridium alloy kept in a vault near Paris.
"The idea is to replace the single master kilogram with something based on ...
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NIST improves accuracy of `watt balance' method for defining the kilogram measurements improve prospects for international redefinition of the kilogram.
M2 Presswire
; ...accuracy of `watt balance' method for defining the kilogram measurements...apparatus called the watt balance or electronic kilogram, is almost accurate...values. The watt balance is one of two...redefining the kilogram. The other approach...
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Watt-balance method accurately defines the kilogram.(pulse)(Brief Article)
Magazine article from: EDN
; ...standard for the kilogram, a century-old...goal, using a watt-balance method they first...hardware. The watt balance is a two-story...photo). The watt balance is one of two leading...redefining the kilogram. The other approach...
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Details of the 1998 watt balance experiment determining the Planck constant.
Magazine article from: Journal of Research of the National Institute of Standards and Technology
; ...Standards and Technology (NIST) watt balance experiment completed a determination...limit on the drift rate of the SI kilogram mass standard. A number of other...power measurement; SI watt unit; watt balance. ********** 1. Introduction...
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Hysteresis and Related Error Mechanisms in the NIST Watt Balance Experiment.
Magazine article from: Journal of Research of the National Institute of Standards and Technology
; The NIST watt balance experiment is being completely...hysteresis; Josephson constant; kilogram artifact; Planck constant; watt balance. Accepted: March 2, 2001...important role is played by watt balance experiments based on the method...
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NIST WATT BALANCE LIVES.(Brief Article)
Magazine article from: Journal of Research of the National Institute of Standards and Technology
; A NIST research team has reassembled the NIST watt balance experiment inside its newly decorated home and the reborn apparatus is showing the first signs of life. The upgraded facility...
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This Kilogram Has A Weight-Loss Problem
Transcript from: NPR Morning Edition
; ...little cylinder is the kilogram. I'll say it again: the kilogram. This is the one on which all other kilograms are based. That...Measures, where the kilogram is kept. He's...which is called the watt balance. Dr. STEINER...
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What do you mean by "kilogram"?
Magazine article from: International News on Fats, Oils and Related Materials : INFORM
; ...power to measure the kilogram using length, time...s constant using a watt balance machine, recording...enough to redefine the kilogram accurately. However...constant using its Mark 2 watt balance show a significant discrepancy...
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The kilogram is losing weight!
News Wire article from: The Hindustan Times
; ...measurement of force on the watt balance (or counting atoms...envisaged deriving the kilogram, matched to experimental...of the prototype kilogram, to within 20 parts per billion. "The watt balance method of defining the kilogram makes the most sense...
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Your kilogram or mine?(Research EDGE)
Magazine article from: ECN-Electronic Component News
; ...International System, only the kilogram still relies on a physical object. Redefining the kilogram should let scientists...proposed alternative kilogram definitions, such as...measurement of force on the Watt balance or counting atoms on...
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Two US academics seeking to define the kilogram better
News Wire article from: The Hindustan Times
; ...the International Prototype Kilogram, he argued that the amount...proposals for redefining the kilogram are under discussion. They...using a device known as the "watt balance" to define the kilogram using electromagnetic energy...
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