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.

Search Publications

NIST Authors in Bold

Displaying 351 - 375 of 569

Comparitive Analysis of an Automotive Air Conditioning Systems Operating with CO 2 and R134a

January 1, 2001
Author(s)
J S. Brown, S F. Yana Motta, Piotr A. Domanski
… This paper evaluates performance merits of CO 2 and R134a automotive air conditioning systems using … condenser, expansion device, and evaporator. The CO 2 system was additionally equipped with a liquid-line/ … speed of 1000 RPM, the COP for CO 2 was lower by 21% at 32.2 C and by 34 % at 48.9 C. At higher speeds and ambient …

Updated NIST Photomask Linewidth Standard

May 1, 2003
Author(s)
J Pedulla, James E. Potzick, Michael T. Stocker
… line- and space-widths range from nominal 0.250 ¿m to 32 ¿m, and pitches from 0.5 ¿m to 250 ¿m, and are traceable … line- and space-widths range from nominal 0.250 ¿m to 32 ¿m, and pitches from 0.5 ¿m to 250 ¿m, and are traceable …

Liquid-Phase Speed of Sound and Vapor-Phase Density of Difluoromethane

September 23, 2022
Author(s)
Aaron Rowane, Elizabeth Rasmussen, Mark O. McLinden
… Difluoromethane (HFC-32, DFM), with a global warming potential (GWP) of 677, is of … at temperatures from 230 to 345 K and pressures from 2.1 to 70 MPa. Accounting for all sources of uncertainty, the relative expanded combined uncertainty (k = 2) in the speed of sound ranged from 0.035 to 0.17%. One …

Thermal Boundary Layers in Critical Flow Venturis

July 30, 2021
Author(s)
John D. Wright, Aaron Johnson, Michael R. Moldover, Woong Kang, Liang Zhang, Bodo Mickan
… T of their environment. At Reynolds numbers Re < 2.5 x 10 5 (e.g., a 2 mm diameter throat; inlet: air at 1 MPa), CFVs exhibit … flow, we used Geropp's functional form: C T = 1+K T Re -1/2 [Δ}T⁄T 0 ] where Δ}T is the difference between the CFV's …

Quantum Versus Classical Spin Fragmentation in Dipolar Kagome Ice Ho 3 Mg 2 Sb 3 O 14

September 29, 2020
Author(s)
Zhiling Dun, Xiaojian Bai, Jospeh A. Paddison, Emily Hollingworth, Nicholas Butch, Clarina D. Cruz, Matthew Stone, Tao Hong, Franz Demmel, Martin Mourigal, Haidong Zhou
… we show that the tripod kagome lattice material Ho 3 Mg 2 Sb 2 O 14 unites an ice-like magnetic degeneracy with … a symmetry-breaking transition at Τ approximately equal} 0.32 K to a remarkable quantum state with three peculiarities: … Classical Spin Fragmentation in Dipolar Kagome Ice Ho 3 Mg 2 Sb 3 O 14 …

Detecting and Receiving Phase-Modulated Signals With a Rydberg Atom-Based Receiver

September 2, 2019
Author(s)
Christopher L. Holloway, Matthew T. Simons, Joshua A. Gordon, David R. Novotny
Recently, we introduced a Rydberg-atom based mixer capable of detecting and measuring of the phase of a radio-frequency field through the electromagnetically induced transparency (EIT) and Autler-Townes (AT) effect. The ability to measure phase with this

Noncentrosymmetric Superconductor BeAu

January 4, 2018
Author(s)
A. Amon, E. Svanidze, R. Cardoso-Gil, M. N. Wilson, H. Rosner, M. Bobnar, W. Schnelle, Jeffrey W. Lynn, R. Gumeniuk, C. Hennig, G. M. Luke, H. Borrmann, A. Leithe-Jasper, Yu Grin
… transition below T c = 3.3 K. The values of lower (H c1 = 32 Oe) and upper (H c2 = 335 Oe) critical fields are rather small, confirming that this type II (KG0L = 2.3) weakly coupled (λ e-p = 0.5, δC e /γnT c approximately …

Multiplicative Complexity of Vector Value Boolean Functions

September 21, 2015
Author(s)
Magnus G. Find, Joan Boyar
… with the highest possible nonlinearity must have at least $2.32n$ AND gates. We further show that one cannot prove … and $m$ bits of output can be computed using at most $2.5(1+o(1))\sqrt{m2^n}$ AND gates. …

HIGHLY CHARGED ION INTERACTIONS WITH THIN INSULATING FILMS

June 1, 2011
Author(s)
Joshua M. Pomeroy, Russell E. Lake, C E. Sosolik
The electrical conductance of magnetic tunnel junction (MTJ) devices whose ultra-thin aluminum oxide tunnel barrier was irradiated by highly charged ions (HCIs) increases linearly with the fluence of HCIs, while retaining a current-voltage relationship
Displaying 351 - 375 of 569
Was this page helpful?