An official website of the United States government
Here’s how you know
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.
David J. Ross, C F. Ivory, Laurie E. Locascio, K E. Van Cott
We report the results of experiments and simulations on electrokinetic flow in diverging microchannels (with cross sectional area that increases with distance...
Using molecular dynamics simulations we have probed the ion-induced changes in the water structure as the concentration of ion is varied. We consider two ions...
Jabez McClelland, Shannon B. Hill, M Pichler, Robert Celotta
A brief review of atom optics is presented, with emphasis on how it can be applied in the field of nanotechnology. Two specific examples are discussed: laser...
A new software tool, the Maximum Pixel Spectrum detects rare events within a spectrum image data cube, such as that generated with electron-excited energy...
We used an on-wafer measurement technique that combines two- and three-port frequency-domain mismatch corrections in order to characterize the influence of a...
Nanotechnology promises to revolutionize a growing set of materials applications ranging from electronics to drug delivery to ballistic protection. However, the...
This paper reports the development of a calcium phosphate cement, comprising tetracalcium phosphate (TTCP) and dicalcium phosphate dihydrate (DCPD), that...
Authentication is the provision of assurance of the claimed identity of an entity. Biometrics is defined as the automated recognition of individuals based on...
B D. Huey, C Ramanujan, M Bobji, J Blendell, Grady S. White, R Szoszkiewicz, A Kulik
Piezo-force microscopy (PFM) is a variation of atomic force microscopy that is widely applied to investigate piezoelectric thin films at the nanometer scale...
Andrew J. Allen, J C. McLaughlin, Dan A. Neumann, Richard A. Livingston
The effects of different particle size distributions on the real-time hydration of tricalcium silicate cement paste have beenstudied in situ by quasi-elastic...
Tactical behaviors by individuals require situational awareness, including knowledge of the environment, self-knowledge, knowledge of the rules of engagement...
Stephen Quirolgico, P Assis, A Westerinen, M Baskey, E Stokes
Self-managing systems will be highly dependent upon information acquired from disparate applications, devices, components and subsystems. To be effectively...
L Andruzzi, A Hexemer, X Li, Christopher K. Ober, E K. Kramer, Giancarlo Galli, E Chiellini, Daniel A. Fischer
Surface-grafted styrene-based homopolymer and diblock copolymer brushes bearing semifluorinated alkyl groups were synthesized by nitroxide-mediated controlled...
Javier Aizpurua, L A. Blanco, P Hanarp, D S. Sutherland, M Kall, Garnett W. Bryant, F J. de Abajo
The optical response of gold nanoparticles of disk-like and ring-like shape is studied by analyzing their extinctioncross section in the visible and near...
This is an article for a general audience that reviews recent imporvements in time and frequency delivery by the Global Positioning System (GPS). A significant...
Charles R. McLean, Frank H. Riddick, Yung-Tsun Lee
This paper presents an overview of a neutral reference architecture and data model for integrating distributed manufacturing simulation systems with each other...
Stephen B. Balakirsky, Elena R. Messina, Craig I. Schlenoff, Stephen J. Smith, M Uschold
The attendees of the Knowledge Representation and Ontologies for Autonomous Systems Symposium applied their collective intelligence in an attempt to solve one...
We demonstrate experimentally and theoretically the degrading effect of noise from source amplified spontaneous emission on measurements of chromatic dispersion...