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.
Security professionals need to understand the attacks and vulnerabilities utilized by hackers to penetrate and shut down computer systems. However, security
Ultrathin Fe films grown on the Gd(0001) surface exhibit a magnetic in-plane to out of plane spin-reorientation transition with increasing temperature.
R A. Bosch, D E. Eisert, Mitchell L. Furst, R M. Graves, L Greenler, A D. Hamilton, L R. Hughey, R P. Madden, P Robl, Ping-Shine Shaw, W S. Trzeciak, Robert E. Vest, D Wahl
The National Institute of Standards and Technology (NIST), formerly the National Bureau of Standards (NBS), has operated the Synchrotron Ultraviolet Radiation
Achieving software certification may seem an unreasonable goal. When it comes to determining whether a software product is dependable, safe, and effective
The major contribution of this paper is a duality between the identification and verification evaluation protocols. The duality (1) gives a mapping between
Mudumbai Ranganathan, V Schaal, V Galtier, Douglas C. Montgomery
A large class of distributed applications follow the event-driven or reactive paradigm. Such applications can benefit from Mobile Agent technology by making it
The tensile creep rate of most commercial grades of Si3N4 increases strongly with stress. Although the usual power-law functions can represent the creep data
This paper presents a robust dual-priority video partitioning method suitable for twin-class unequal protected video transmission over wireless channels. The
This article provides a short overview of past and present advancements in mobile communication systems, as well as identifying major challenges for the future
Wafers from mercuric iodide crystals grown in microgravity on two occasions have previously been found to be characterized by a higher hole mobility-lifetime
The thermodynamics of the Ni-Al-B system are assessed based on available literature data. The ternary assessment included the revision of the Al-B binary
The three omega thermal conductivity measurement method is analyzed for the case of one or more thin films on a substrate of finite thickness. The analysis is
The electrodeposition of Cu-Al alloys, as well as the underpotential deposition (UPD) of Al onto Cu(lll), were investigated in acidic aluminum chloride/1-methyl
A Topp, Barry J. Bauer, D A. Tomalia, Eric J. Amis
The average dimensions of poly (amido amine) (PAMAM) dendrimers of generation numbers G5 and G8 are measured by small angle neutron scattering as a function of
Chemically assisted machining of ceramics is a way to remove ceramic materials rapidly using chemical reactions at the interface between the tool and the
The Ceramic Processing Characterization Consortium (CPCC) held its semi annual meeting in Indianapolis on April 25, 1999. The meeting was attended by over 60
A Topp, Barry J. Bauer, J W. Klimash, R Spindler, D A. Tomalia, Eric J. Amis
The spatial distribution of the terminal groups of poly (amido amine) dendrimers have been determined experimentally by small angle neutron scattering with
Edward W. Hagley, Lu Deng, M M. Kozuma, M Trippenbach, Y B. Band, M Edwards, M R. Doery, Paul S. Julienne, Kristian Helmerson, S L. Rolston, William D. Phillips
We study the coherence properties of a Bose-Einstein condensates using an interference technique. Two 100 ns optical standing wave pulses are applied to a
We present results of Monte Carlo simulations for dilute to concentrated solutions of athermal, homogeneous dendritic polymers. The dendritic polymers are
The results of a molecular dynamics simulation study of water acetonitrile mixtures over the temperature range 297 K to 415 K are reported. The emphasis is on
The reactions of a chemical system are dictated by the corresponding potential energy surface (PES). Since reasonably accurate PESs are now available from
Three carbon dioxide isotopic Reference Materials (RM 8562, RM 8563, and RM 8564) have been prepared and characterized for composition, heterogeneity, and
Jack A. Stone Jr., Alois Stejskal, Lowell P. Howard
In the last few years there has been much interest in the use of tunable diode lasers for absolute interferometry. Here we report on the use of an external
Jack A. Stone Jr., Alois Stejskal, Lowell P. Howard
Diode lasers are becoming increasingly important in length metrology. In particular, the tunability of diode lasers makes them attractive for applications such
We are developing a micro X-ray fluorescence (micro-XRF) instrument that combines a polycapillary optic with a standalone X-ray tube. The optic transmits and
Robert F. Berg, Michael R. Moldover, G A. Zimmerli
We used a novel, overdamped oscillator aboard the Space Shuttle to measure the viscosity Η of xenon near its critical density ρ c and temperature T c. In
The BBGKY formalism is utilized to obtain a set of moment equations to be satisfied by the collision operator in an energy conserving discrete Boltzmann
Dale P. Bentz, Edward J. Garboczi, C Haecker, O M. Jensen
The original size, spatial distribution, and composition of Portland cement particles have a large influence on hydration kinetics, microstructure development