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The exchange between physics and metrology is always fascinating and exciting. Many are the open problems in physics that call for extremely precise standards, many are the advances in metrology made possible by a deep and assiduous study of the underlying physics. One has just to think of the enormous sophistication required in the measurements of some absolute quantities such as the Avogadro, the gas, or the gravitational constants. It is also worth noticing that not only the units of a metrological system are interrelated through the fundamental constants, but also the latter find their full significance when they are determined through the most exacting metrological experiments. Over the past decade many improvements took place and these are discussed in this book; from one side the old caesium SI second definition has found a new realisation, with the "fountain" approach, replacing the classical thermal atomic beam. The use of "cold" atom techniques, in which bunches of inert atoms are collected, slowed down, and cooled, has opened a number of new and unexpected avenues for metrology and fundamental constants; one of these possibilities being the atom interferometry. Another important "quantum jump" was the demonstration of the possibility of performing a direct frequency division in the visible, using ultra short femtosecond pulses. In addition, the possibility of "counting" electrons or photons gave a fundamental support to the development of single-electron capacitance standards and to new scenarios in the absolute calibration of photo-detectors ... Read more

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The URSI Register is a comprehensive and up to date survey of National Standards Laboratories, the types of measurements they can make, their results and other relevant information. The register consists of an entry for each National Laboratory, usually in the following format: organisation, national standards, calibration facilities. THe coverage of electromagnetic metrology is comprehensive and includes measurements of time and frequency, of DC and LF electrical and magnetic quantities, and of radio and microwave frequencies with extensions where appropriate to infrared and optical frequencies. The register will be an invaluable source of information in Government laboratories and universities for those who work in the field of electromagnetic metrology. It will also be especially useful for industrial laboratories where this type of information is increasingly required to take advantage of export opportunities. ... Read more

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Proceedings of the International Conference on Characterization and Metrology for ULSI Technology, held in Gaithersburg, Maryland, June 26-29, 2000. Topics covered included front end processes, contamination and defect analysis, and lithography. Includes a CD-ROM for use with the text. System requirements not listed. ... Read more

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Designed to present and promote reliable and effective mathematical and computational tools in metrology, and understand better the modelling, statistical and computational requirements in metrology. DLC: Mensuration. ... Read more

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This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words.This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ... Read more

Product Description
This is a reproduction of a book published before 1923.This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process.We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide.We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ... Read more

Product Description
This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words.This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ... Read more

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Reporting on the latest international standards, calibration and certification procedures, this volume contains the official proceedings of the Fifth International Conference on Laser Metrology, Machine Tool, CMM and Robot Performance. Areas highlighted include:

Machine tool condition monitoring and calibration.

Co-ordinate metrology and its application to manufacturing performance and industrial inspection.

New techniques in performance assessment and verification.

Numerical and computational tools. ... Read more

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Cambridge's new McDonald Institute for Archaeological Research owes its origin to the generosity of Daniel McLean McDonald, and it is an appropriate act of pietas that the Institute's first monograph should be a collection of his writings. Dr McDonald was fascinated by systems of weighing and measuring and his investigations ranged from Egypt and Sumer through Classical times to the Middle Ages and the New World. He saw very clearly how the use of liquid to measure capacity imposed a relationship between units of weight and those used to measure volume and hence length; and for him the units employed by the ancients possessed a coherence that reflected a very pragmatic understanding of the real world. His writings on metrology do not seem to have been written for publication and are pretty cryptic to the uninitiated, and some of his hypotheses on the relationship between various systems are, to say the least, bold - but it is from such speculations that understanding grows, and understanding intelligence and its origins is one of the aims of the McDonald Institute and its new Cambridge Archaeological Journal. ... Read more