NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
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.
W J. Fisk, G Brager, M Brook, H Burge, J Cole, J Cummings, H Levin, V Loftness, T Logee, M J. Mendell, Andrew K. Persily, S Taylor, J Zhang
A multidisciplinary team of IEQ and energy researchers is working together to define a program of priority energy-related IEQ research. This paper describes the
R22 and R410A split air-conditioning systems were tested and compared as outdoor temperature ranged form 27.8 C (82.0 F) to 54.4 F (130 F). The R410A system
Muhammad Afridi, John S. Suehle, Mona E. Zaghloul, David W. Berning, Allen R. Hefner Jr., Stephen Semancik, Richard E. Cavicchi
A monolithic CMOS micro-gas-sensor system, designed and fabricated in a standard CMOS process, is described. The gas-sensor system incorporates an array of four
Introduction: The potential for quick and direct measurement of chemical composition, absolute molecular mass (MM), MM distribution of linear and branched
A P. Weaver, Charles M. Guttman, Kathleen M. Flynn
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI TOF MS) has been employed to analyze polystryrene mixtures of molecular mass
This paper describes studies of matrix-assisted laser desorption ionization time-of-flight mass spectrometry of polyethylene using metal powder as the matrix
We apply genetic programming in conjunction with other machine learning methods to obtain concise rules that accurately identify scientifically meaningful
K S. Chang, M A. Aronova, O Famodu, Jason Hattrick-Simpers, S E. Lofland, Ichiro Takeuchi, C J. Lu, Leonid A. Bendersky, H C. Chang
We have used our combinatorial pulsed laser deposition system to in-situ fabricate epitaxial Ba(sub1-x)Sr(sub x)Ti)(sub 3) thin film composition spreads on (100
Integrating sphere reflectometers are used in the majority of instruments used for spectral reflectance measurements of non-specular (scattering) samples
S Grantham, Charles Tarrio, M B. Squires, Thomas B. Lucatorto
Currently the most demanding application of extreme-ultraviolet (EUV) optics is in lithography. A commercial extreme-ultraviolet stepper will likely have six or
Complex systems, such as manufacturing supply chains, are often modeled as a collection of interacting components with information flows between them. These
A basic scheme of direct, highly accurate dimensional measurements of nanostructures is presented. We have constructed a scanning tunneling microscope (STM)
Bradley N. Damazo, James D. Gilsinn, Richard M. Silver, Hui Zhou
As nano-lithography improves, more companies and research groups have the capability to create nano-scale structures. Scanning Tunneling Microscopes (STMs) are
Frederick M. Proctor, John L. Michaloski, William P. Shackleford
While simulation has been successful in tying design and process planning into an iterative loop, machining has traditionally been a downstream terminus of the
The lack of interoperability and integration standards is severely hindering manufacturing productivity. To address this problem, a General Motion Control (GMC)
Cavity ringdown spectroscopy (CRDS) is a highly sensitive spectroscopic technique that has been successfully applied to problems such as trace gas detection and
This paper reports results for uncertainties obtained using a Monte Carlo simulation of noise-parameter measurements. The simulator permits the computation of
The traditional concept of group delay usually arises in connection with an expansion of the phase delay for an electromagnetic pulse. In this context, the
Dominique Schreurs, Jeffrey Jargon, Kate Remley, Donald C. DeGroot, Kuldip Gupta
We develop a methodology to construct behavioral models for microwave devices from time-domain large-signal measurements. The behavioural model for the
Mark H. Weatherspoon, Lawrence P. Dunleavy, Ali Boudiaf, James P. Randa
A new one-port noise temperature measurement technique is presented that uses receiver noise parameters for error correction. Improved accuracy in one-port
Richard G. Geyer, Pavel Kabos, James R. Baker-Jarvis
Low loss sleeve resonators can be used for accurate microwave dielectric characterization of rod-shaped test specimens. The test specimen is inserted into the
Catherine A. Remley, Jeffrey A. Jargon, Dominique Schreurs, Donald C. DeGroot, Kuldip Gupta
We develop a method for using metrics in conjunction with repeat measurements to study nonlinear models. We illustrate this procedure by investigating the
We investigated the dielectric relaxation process in high-dielectric constant polymer composite films filled with barium titanate particles. In order to extend
Effective intrusion detection capability is an elusive goal, not solved easily or with a single mechanism. However, mobile software agents go a long way toward
Polarization-mode dispersion (PMD) is an interesting phenomenon. Unfortunately, interesting usually means complicated, and that is definitely the case with PMD
The American Society of heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has been revising Standard 62,Ventilation for Acceptable Indoor Air