Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Journals

Design of an on-chip microscale nanoassembly system

Author(s)
Jason J. Gorman, Yong Sik Kim, Andras Vladar, Nicholas G. Dagalakis
A microscale nanoassembly system has been designed for the fabrication of nanodevices and in situ electromechanical characterisation of nanostructures. This

Face Recognition by Computers and Humans

Author(s)
P J. Phillips, Rama Chellappa, Pawan Sinha
In most situations, identifying humans using faces is an effortless task for humans. Is this true for computers? This very question defines the field of

Pulse Shape Discrimination for a Fast Neutron Detector

Author(s)
Kevin J. Coakley, Dominic F. Vecchia, Jeffrey S. Nico, B Fisher
We are developing a detector that uses liquid scintillator loaded with Li-6 for the efficient measurement of fast neutrons and their energy. Such a detector

A new connection between electricity and magnetism

Author(s)
Robert D. McMichael, Mark D. Stiles
A Viewpoint on ``Universal Electromotive Force Induced by Domain Wall Motion,'' Shengyuan A. Yang, Geoffrey S. D. Beach, Carl Knutson, Di Xiao, Qian Niu, Maxim

3D Particle Trajectories Observed by Orthogonal Tracking Microscopy

Author(s)
Matthew D. McMahon, Andrew J. Berglund, Peter T. Carmichael, Jabez J. McClelland, James A. Liddle
We demonstrate high-resolution, high-speed 3D nanoparticle tracking using angled micromirrors. When angled micromirrors are introduced into the field of view of

Statistical analysis of a round-robin measurement survey of two candidate materials for a Seebeck coefficient Standard Reference Material

Author(s)
John Lu, Nathan Lowhorn, Winnie Wong-Ng, Weiping Zhang, Evan L. Thomas, Makoto Otani, Martin L. Green, Thanh N. Tran, Chris Caylor, Neil Dilley, Adams Downey, B Edwards, Norbert Elsner, S Ghamaty, Timothy Hogan, Qing Jie, Qiang Li, Joshua B. Martin, George S. Nolas, H Obara, Jeffrey Sharp, Rama Venkatasubramanian, Rhonda Willigan, Jihui Yang, Terry Tritt
In an effort to develop a Standard Reference Material (SRM ) for Seebeck coefficient, we have conducted a round-robin measurement survey of two candidate

Radiative Beta Decay of the Free Neutron

Author(s)
R L. Cooper, T E. Chupp, Maynard S. Dewey, Thomas R. Gentile, Hans Pieter Mumm, Jeffrey S. Nico, Alan Keith Thompson, B M. Fisher, I Kremsky, F E. Wietfeldt, E J. Beise, H Breuer, K G. Kiriluk, J Bryne, Kevin Coakley, Changbo Fu
The theory of quantum electrodynamics predicts that the beta decay of the neutron into a proton, electron, and antineutrino is accompanied by a continuous

Fish-Related Standard Reference Materials

Author(s)
Michele M. Schantz, Steven J. Christopher, William C. Davis, Russell D. Day, Jennifer M. Lynch, John R. Kucklick, Stephen E. Long, Elizabeth A. Mackey, Barbara J. Porter, Dianne L. Poster, Katherine E. Sharpless, Gregory C. Turk, Stephen A. Wise
The National Institute of Standards and Technology (NIST) has developed four Standard Reference Materials (SRMs) related to the monitoring of contaminants in

Half-life Measurements of Sr82

Author(s)
Leticia S. Pibida, Ryan P. Fitzgerald, Michael P. Unterweger, Michelle M. Hammond, Daniel B. Golas
Half-life measurements of 82Sr were performed at the National Institute of Standards and Technology (NIST) using gamma-ray spectrometry and a 4 pressurized

Interlaboratory Comparison Study of Serum Total Testosterone [corrected] Measurements Performed by Mass Spectrometry Methods

Author(s)
Susan S. Tai, Hubert W. Vesper, S. Bhasin, C. Wang, L. A. Dodge, R. J. Singh, J. Nelson, S. Ohorodnik, N. J. Clarke, W. A. Salameh, C. R. Parker, Jr., R. Razdan, E. A. Monsell, Gary L. Myers
BACKGROUND: Though mass spectrometry (MS) assays are increasingly used for routine clinical measurements of serum total testosterone (TT), information about the