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Displaying 2876 - 2900 of 4199

EVALUATION OF A LASER SCANNER FOR LARGE VOLUME COORDINATE METROLOGY - A COMPARISON OF RESULTS BEFORE AND AFTER FACTORY CALIBRATION

October 1, 2014
Author(s)
Massimiliano Ferrucci, Bala Muralikrishnan, Daniel S. Sawyer, Steven D. Phillips, Peter Petrov, Yuri Yakovlev, Andrey Astrelin, Spike Milligan, John Palmateer
Large volume laser scanners are increasingly being used for a variety of dimensional metrology applications. Methods to evaluate the performance of these scanners are still under development and there are currently no documentary standards available. This

The red color in 19th century Thai glass studied by X-ray and optical spectroscopy

July 2, 2014
Author(s)
Bruce D. Ravel, Wantana Klysubun, G. Lawrence Carr, Christoph Hauzenberger
The Temple of the Emerald Buddha in Bangkok, Thailand is noted for its glass mosaic decorations on exterior walls and statuary. The original mosaic artwork dates to the early 19th century and is composed of variously-colored, mirrored glass pieces. In this

Towards Mobile Manipulator Safety Standards

October 24, 2013
Author(s)
Jeremy A. Marvel, Roger V. Bostelman
… (robot arms mounted on mobile bases) in modern manufacturing. Considerations for the capabilities of mobile …

Miniature Fourier Transform Instrument for Radiation Thermometry

October 16, 2008
Author(s)
F J. Dunmore, Leonard Hanssen
A miniature Fouier transform (FT0 spectrometer was evaluated as a device for remotely measuring the temperature of a high stability/emissivity blackbody. The device, commercially manufactured by Photonex LTD.,* is based on the novel design of a polarizing

Reference Ballistic Chronograph for Personal Armor Characterization

October 9, 2008
Author(s)
Nicholas Paulter, Donald R. Larson
Ballistic armor is evaluated using a V50 parameter, which describes the velocity above which half the shots are expected to penetrate a given type of body armor. The greater the error and uncertainty in measuring the velocity of the bullet, the greater the

A Low Cost Digital Vibration Meter

April 1, 2007
Author(s)
William V. Payne, Jon Geist
… the use of Micro-Electronic and Mechanical Systems (MEMS) manufacturing techniques. The major mechanical element of the …

Vehicle Fire Suppression Research Needs

March 1, 2007
Author(s)
Anthony P. Hamins
This report identifies research needs in automotive fire protection. The work focuses on the problem of post-collision vehicle fires. Recent fire suppression research is cited with special attention given to results cited in the scientific literature as

Microwave transitions and nonlinear magneto-optical rotation in anti-relaxation-coated cells

January 27, 2005
Author(s)
D Budker, Leo W. Hollberg, Derek F. Kimball, John E. Kitching, S Pustelny, V V. Yashchuk
Using laser optical pumping, widths and frequency shifts are determined for microwave transitions between ground-state hyperfine components of {8s}Rb and d{87}Rb atoms contained in vapor cells with alkane anti-relaxation coatings. The results are compared

A Feature-Based Inspection and Machining System

August 1, 2001
Author(s)
Thomas R. Kramer, Hui-Min Huang, Elena R. Messina, Frederick M. Proctor, Harry A. Scott
… (2) as a testbed for solving problems in feature-based manufacturing, and (3) to test the usability of STEP methods …

Investigation of the Non-Uniqueness of the ITS-90 in the Range 660 C to 962 C

June 1, 2001
Author(s)
G T. Furukawa, Gregory F. Strouse
Preliminary results are reported on the non-uniqueness of the ITS-90 using high temperature SPRTs (HTSPRTs) in the range 660 C to 962 C. To achieve temperature stability and uniformity of the test HTSPRTs, the method employs the thermal isolation of the

An Overview of the Development of Technical Infrastructure in the Asia-Pacific Region: The Work of the Asia-Pacific Economic Cooperation (APEC) Sub-Committee in Standards and Conformance (SCSC) and the Specialist Regional Body (SRBS)

June 1, 1999
Author(s)
C R. DeVaux
The development and maintenance of an economy's standards and conformance technical infrastructure is critical to its economic health. By increasing the competence of its measurement and testing capabilities, in particular, an economy can provide

Objective measurement and characterization of scratch standards

March 1, 1983
Author(s)
M. Young
The manufacture of scratch standards for use with MIL-0-13830A has been hampered by the lack of an objective measurement technique, The U.S. National Bureau of Standards has therefore undertaken a comprehensive program to provide quantitative measurements

Human Use Conditions in Fatigue of Intravenous Leads Used in Cardiac Implanted Electronic Devices

July 3, 2025
Author(s)
Timothy Quinn, Charles Swerdlow, Lucas Koepke, James Dawson, Nicki Mara, Jason Santelli, Diane Muff, Jordan Savela, Alex Felber, Michael Friedrich, Jens Rump, Torsten Luther, Jake Benzing, Michael Peterson, Mohit Chawla, Stanislav Weiner, Byron Colley III, Jonathan Piccini
Background: Transvenous lead conductors are subject to fatigue fracture from repetitive bending stresses, which are proportional to alternating curvature. Knowledge of the stresses on implanted leads (fatigue environment) is a prerequisite for developing a

Cellulose Nanomaterials: Nanocomposite Imaging using FRET

June 19, 2013
Author(s)
Jeffrey W. Gilman, Mauro Zammarano, Iulia A. Sacui, Jeremiah Woodcock
… several pilot plants and a number of commercial scale CNC manufacturing facilities have recently gone online worldwide … over many length scales, are needed to enable successful manufacturing and product development of cellulose …

Data Logger Thermometers for Vaccine Temperature Monitoring

November 23, 2012
Author(s)
Michal J. Chojnacky
Complete and accurate records of vaccine temperature history are vital to preserving drug potency and patient safety, yet many vaccine providers do not use continuous temperature monitoring systems in their vaccine refrigerators. We evaluated the
Displaying 2876 - 2900 of 4199
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