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Metrology

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Displaying 1451 - 1475 of 2731

Neutron Imaging of Lithium Concentration in Battery Pouch Cells

March 23, 2011
Author(s)
Daniel S. Hussey, David L. Jacobson, Jason B. Siegel, C. D. Stefan, Xinfan Lin, David Gorsich
This paper shows how neutron radiography can be used for in situ quantification of the lithium concentration across battery electrodes, a critical physical system state. The change in lithium concentration between the charged and discharged states of the

Comparison of 4.5 kV SiC JBS and Si PiN Diodes for 4.5 kV Si IGBT Anti-parallel Diode Applications

March 10, 2011
Author(s)
Tam H. Duong, Allen R. Hefner Jr., Karl Hobart, Sei-Hyung Ryu, David Grider, David W. Berning, Jose M. Ortiz, Eugene Imhoff, Jerry Sherbondy
A new 60 A, 4.5 kV SiC JBS diode is presented and its performance is compared to Si PiN diodes used as the anti-parallel diode for 4.5 kV Si IGBTs. The current-voltage, capacitance-voltage, reverse recovery, and reverse leakage characteristics of both

Measurement Traceability and Quality Assurance in a Nanomanufacturing Environment

March 8, 2011
Author(s)
Ndubuisi G. Orji, Ronald G. Dixson, Aaron Cordes, Benjamin Bunday, John Allgair
A key requirement for nano-manufacturing is maintaining acceptable traceability of measurements performed to determine size. Given that properties and functionality at the nanoscale are governed by absolute size, maintaining the traceability of dimensional

Adopting the International System of Units to the 21st century

March 1, 2011
Author(s)
Peter J. Mohr, Ian M. Mills, Terry Quinn, Barry N. Taylor, Edwin R. Williams
We review the proposal of the International Committee for Weights and Measures (CIPM), currently being considered by the General Conference on Weights and Measures (CGPM), to revise the International System of Units, the SI. The proposal includes new

Nanoelectronics Lithography

March 1, 2011
Author(s)
Stephen Knight, Vivek Prabhu, John H. Burnett, James Alexander Liddle, Christopher Soles, Alain C. Diebold
This is a compiled chapter that will be included into the Handbook of Nanophysics.

Flexure-induced structural and electronic changes in polymer supported membranes of length purified single-wall carbon nanotubes

February 22, 2011
Author(s)
John M. Harris, Ganjigunte R. Iyer, Daneesh O. Simien, Jeffrey Fagan, JiYeon Huh, Jun Y. Chung, Steven Hudson, Jan Obrzut, Jack F. Douglas, Christopher Stafford, Erik K. Hobbie
Thin membranes of length purified single-wall carbon nanotubes (SWCNTs) are uniaxially compressed by depositing them on prestretched polymer substrates. Upon release of the strain, the topography, microstructure and conductivity of the films are

Neutron Depth Profiling Technique for Studying Aging in Li-ion Batteries

February 15, 2011
Author(s)
Robert G. Downing
During operation of a Li-ion cell, lithium diffuses in and out of the solid phase anode and cathode. Measuring the lithium transport within the cell over its operational life could provide key information for understanding the loss of active lithium and

Manipulation of adhesion via sub-surface patterning

February 13, 2011
Author(s)
John A. Howarter, Peter M. Johnson, Jun Y. Chung, Christopher Stafford
The delamination characteristics of patterned and hierarchical interfaces are of great interest due to the advanced adhesion capabilities found with many biological surfaces. Using nature-inspired design principles, micro- and nanostrucutred surfaces have

Co-X Panel Discussion

February 4, 2011
Author(s)
Elena R. Messina, Brian A. Weiss, Rajmohan Madhavan
Robots as co-protectors, co-inhabitants, co-workers, co-integrants, or more generically, "Co-X" will improve effectiveness, efficiency, safety, security, and improve quality of life in the coming years. In-keeping with the theme of PerMIS'10, which

Mixed Pallet Stacking: An Overview and Summary of the 2010 PerMIS Special Session

February 4, 2011
Author(s)
Stephen B. Balakirsky, Henrik I. Christensen, Thomas R. Kramer, Pushkar Kolhe, Frederick M. Proctor
Stacking boxes of various sizes and contents on pallets (i.e. making mixed pallets) is a primary method of preparing goods for shipment from a warehouse to a store or other distant site. A special session of the 2010 PERMIS workshop was held to examine

Passive Intermodulation due to Self-Heating in Printed Transmission Lines*

February 2, 2011
Author(s)
Eduard Rocas, Juan C. Collado Gomez, Nathan D. Orloff, Jordi Mateu, James C. Booth, Juan M. O'Callaghan, Alberto Padilla
Abstract—This article proposes a mechanism by which third-order intermodulation distortion due to self-heating is generated in transmission lines. The work shows how transmission lines made of several materials whose properties are independent of the

Development of Ultrasmall-Angle X-ray Scattering - X-ray Photon Correlation Spectroscopy

February 1, 2011
Author(s)
Fan Zhang, Andrew J. Allen, Lyle E. Levine, Jan Ilavsky, Gabrielle G. Long, Anthony M. Santana
In this paper, we present the development of ultrasmall-angle X-ray scattering - X-ray photon correlation spectroscopy (USAXS-XPCS). This technique takes advantage of Bonse-Hart crystal optics and is capable of probing the slow equilibrium and

Train the Trainer: Did they Learn? Who Cares?

January 31, 2011
Author(s)
Georgia L. Harris
As metrologists, we think we are good (even expert) at measurements. But, our subject matter expertise is most often in the world of science, and not necessarily in the world of education. There are a number of aspects of measuring training that we could

Present Estimates of the Differences Between Thermodynamic Temperatures and the ITS-90

January 29, 2011
Author(s)
Joachim Fischer, M. DePodesta, K. D. Hill, Michael R. Moldover, Laurent Pitre, R. Rusby, Peter Steur, Osamu Tamura, R. White, L. Wolber
In 2005, the Consultative Committee for Thermometry (CCT) recommended the creation of a Mise en pratique for the definition of the kelvin and envisioned that future versions of the Mise en pratique would recommend values of the differences between
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