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Displaying 30226 - 30250 of 74656

Hydraulically Pumped Cone Fracture in Brittle Solids

October 21, 2008
Author(s)
Herzl Chai, Brian R. Lawn
An analysis of inner cone cracks in brittle solids subject to cyclic indentation in liquid is presented. These inner cone cracks, so named because they form well within the maximum contact circle, are postulated to be driven by a hydraulic pumping

Aqueous blackbody calibration source for millimeter-wave/terahertz metrology

October 20, 2008
Author(s)
Charles Dietlein, Zoya Popovic, Erich N. Grossman
This paper describes a calibrated broadband emitter for the millimeter-wave through terahertz frequency regime, called the aqueous blackbody calibration source. Due to its extremely high absorption, liquid water is chosen as the emitter on the basis of

A COMPACT, COMPOUND ACTUATOR FOR THE MOLECULAR MEASURING MACHINE

October 19, 2008
Author(s)
Jing Li, Yin-Lin Shen, Jaehwa Jeong, Fredric Scire, John A. Kramar
A compact, two-stage, vertical actuator with built-in sensors has been developed for the Molecular Measuring Machine (M3) and other potential precision instrumentation applications, such as scanning probe microscopy (SPM). In this article, we describe the

Comparison of NIST SI Force Scale to NPL SI Mass Scale

October 19, 2008
Author(s)
Christopher W. Jones, John A. Kramar, Stuart Davidson, Richard Leach, Jon R. Pratt
Small masses in the 1.0 mg to 0.1 mg range were developed and calibrated at NPL with traceability to the IPK. These masses were transported to NIST at Gaithersburg and used as deadweights on the NIST electrostatic force balance, to facilitate a mass-force

Error Motions of a Non-orthogonal Rotary Axis

October 19, 2008
Author(s)
Michael L. McGlauflin, Shawn P. Moylan
Error-motions of rotating axes are one of many sources of imprecision in machining. Accurate determination of axis of rotation error motions of the rotary axes has a direct influence on the accuracy of the finished part. International and U.S. national

A New Spin on the Doppler Effect

October 17, 2008
Author(s)
Mark D. Stiles, Robert D. McMichael
The coupling between ferromagnetism and electrical current has recently been the object of intense study because of the combination of interesting scientific developments and the potential technological impact. This coupling is mediated by spin current

Cooling Mode Fault Detection And Diagnosis Method For A Residential Heat Pump

October 17, 2008
Author(s)
Minsung Kim, Seok H. Yoon, William V. Payne, Piotr A. Domanski
Performance characteristics of a R410A residential unitary split heat pump equipped with a thermostatic expansion valve (TXV) were investigated in the cooling mode under no-fault and faulty conditions. An automated method of steady-state detection was

High Performance Organic Thin-Film Transistors Made Simple Through Molecular Design and Processing

October 17, 2008
Author(s)
Oana Jurchescu, Marina Feric, Behrang H. Hamadani, M. Devin, Sankar Subramanian, Balaji Purushothamanc, John E. Anthony, Thomas Jackson, David J. Gundlach
We report on a simple a method of inducing self-isolation of the thin film transistors via manipulation of the chemical interactions between the organic molecules and the surfaces where they are deposited. We use pentafluorobenzenethiol (PFBT) treatment of

International photomask linewidth comparison by NIST and PTB

October 17, 2008
Author(s)
James E. Potzick, Ronald G. Dixson, Richard Quintanilha, Michael T. Stocker, Andras Vladar, Egbert Buhr, Bernd Bodermann, Wolfgang Hassler-Grohne, Harald Bosse, C.G. Frase
In preparation of the international Nano1 linewidth comparison on photomasks between 8 national metrology institutes, NIST and PTB have started a bilateral linewidth comparison in 2008, independent of and prior to the Nano1 comparison in order to test the

Standardization of Auxiliary Equipment for Next Generation CNC Machining

October 17, 2008
Author(s)
David Odendahl, Sid Venkatesh, John L. Michaloski, Frederick M. Proctor
This paper presents the recent work of the Open Modular Architecture Control (OMAC) Machine Tool Working Group to support STEP-NC, which is a new standard for the exchange of comprehensive Computer Numerical Control (CNC) manufacturing data. Because of the

The Origins of Random Telegraph Noise in Highly Scaled SiON nMOSFETs

October 17, 2008
Author(s)
Jason P. Campbell, Jin Qin, Kin P. Cheung, Liangchun (. Yu, John S. Suehle, A Oates, Kuang Sheng
Random telegraph noise (RTN) has recently become an important issue in advanced circuit performance. It has also recently been used as a tool for gate dielectric defect profiling. In this work, we show that the widely accepted model thought to govern RTN

The transient behavior of NBTI - A new prospective

October 17, 2008
Author(s)
Kin P. Cheung, Jason P. Campbell
The Negative-Bias-Temperature-Instability (NBTI) is currently one of the most serious reliability issues in advanced CMOS technology. Specifically, the fast recovery of NBTI degradation immediately after stress is removed has recently become a hot topic

(235), Martensite: An Inclusion-Theory Explanation

October 16, 2008
Author(s)
H M. Ledbetter, Martin Dunn
We consider what is, perhaps, martensite's greatest crystallographic problem: ferrous martensites with a habit plane p near (225)f, or viewed more recently as nearer (449)f or even (112)f. We predict p within 2.6 degrees of observation and on the (hhl)f

2001 Weights and Measures Directory

October 16, 2008
Author(s)
L T. Sebring
This directory is a listing of weights and measures officials in the U.S. and its territories. It includes the official's agency, title, address, phone, fax, e-mail, and some url addresses.

2004 Weights & Measures Directory, NISTIR 6500 2004 ED

October 16, 2008
Author(s)
L T. Sebring
This directory is a listing of weights & measures Officials in the U.S. and its territories. It includes each official's agency, title address, phone, fax, email, and some URL addresses.
Displaying 30226 - 30250 of 74656
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