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Microwave power absorption in low-reflectance, complex, lossy transmission lines
absorption; microchannel; microfluidic device; microwave; transmission line
Simple sets of equations have been derived to describe the absorption of microwave power in three-region, lossy transmission lines in terms of S-parameter reflection and transmission amplitudes. Each region was assumed to be homogeneous with...
Journal of Research of NIST and Predecessor Publications

Simple Thermal-Efficiency Model for CMOS-Microhotplate Design
CMOS; low-voltage; MEMS; microhotplate; model; sub-micron
Simple, semi-empirical, first-order, analytic approximations to the current, voltage, and power as a function of microhotplate temperature are derived. To lowest order, the voltage is independent of, and the power and current are inversely...
Journal of Research of NIST and Predecessor Publications

Large-scale, preparative paper chromatography
Chromatography on seed-test paper; large-scale paper chromatography; radioactive carbohydrates; use of heavy papers in preparative chromatography
Simplified techniques are described for the use of heavy papers in large-scale, preparative chromatography. A new technique is illustrated for nondestructively locating bands of compounds on wet chromatograms. Capacities and behavior...
Journal of Research of NIST and Predecessor Publications

CAA baggage compartment study- Simulated aircraft baggage and cargo comparment fires
Photographs; History; Metrology; Fire prevention; Research; 1940s
Simulated aircraft baggage and cargo compartment fires. In 1949, at the request of the Civil Aeronautics Board, NBS tested the characteristics of fires inside aircraft baggage and cargo compartments. The results of these tests were used to...
Historic Images

CAA baggage compartment study- Simulated aircraft baggage and cargo comparment fires
Photographs; History; Metrology; Fire prevention; Research; 1940s
Simulated aircraft baggage and cargo compartment fires. In 1949, at the request of the Civil Aeronautics Board, NBS tested the characteristics of fires inside aircraft baggage and cargo compartments. The results of these tests were used to...
Historic Images

CAA baggage compartment study- Simulated aircraft baggage and cargo comparment fires
Photographs; History; Metrology; Fire prevention; Research; 1940s
Simulated aircraft baggage and cargo compartment fires. In 1949, at the request of the Civil Aeronautics Board, NBS tested the characteristics of fires inside aircraft baggage and cargo compartments. The results of these tests were used to...
Historic Images

Simulating Timescale Dynamics of Network Traffic Using Homogeneous Modeling
correlation structure; modeling; network traffic; simulation; wavelet-based analysis
Simulating and understanding traffic dynamics in large networks are difficult and challenging due to the complexity of such networks and the limitations inherent in simulation modeling. Typically, simulation models used to study traffic dynamics...
Journal of Research of NIST and Predecessor Publications

Thermophysical measurements on 90Ti-6al-4V alloy above 1450 K using a transient (subsecond) technique
Electrical resistivity; heat capacity; high-speed measurements; high temperatures; melting; normal spectral emittance; radiance temperature; specific heat capacity; thermal radiation properties; thermodynamics; titanium alloy
Simultaneous measurements are described of specific heat capacity, electrical resistivity and hemispherical total emittance of the ternary alloy 90Ti-Al-4V in the temperature range 1450 to 1900 K, and the melting point and and the radiance...
Journal of Research of NIST and Predecessor Publications

Thermophysical measurements on iron above 1500 K using a transient (subsecond) technique
Electrical resistivity; emittance; heat capacity; high-speed measurements; high temperature; iron; melting point; phase transformation; thermodynamics; thermophysical properties
Simultaneous measurements of heat capacity, electrical resistivity and hemispherical total emittance of iron (99.9% pure) in the temperature range 1500 to 1800 K, and the melting point of iron by a subsecond duration, transient technique are...
Journal of Research of NIST and Predecessor Publications

Simultaneous measurements of heat capacity, electrical resistivity and hemispherical total emittance by a pulse heating technique: zirconium, 1500 to 2100 K
Electrical resistivity; emittance; heat capacity; high-speed measurements; high temperature; thermodynamics; thermophysical properties; zirconium
Simultaneous measurements of heat capacity, electrical resistivity and hemispherical total emittance of zirconium in the temperature range 1500 to 2100 K by a subsecond duration, pulse heating technique are described. The results are expressed by...
Journal of Research of NIST and Predecessor Publications

Simultaneous measurements of heat capacity, electrical resistivity, and hemispherical total emittance by a pulse heating technique: Vanadium, 1500 to 2100 K
Electrical resistivity; emittance; heat capacity; high-speed measurements; high temperature; thermodynamics; thermophysics; vanadium
Simultaneous measurements of heat capacity, electrical resistivity, and hemispherical total emittance of vanadium in the temperature range 1500 to 2100 K by a subsecond duration, pulse heating technique are described. The results are expressed by...
Journal of Research of NIST and Predecessor Publications

Studies of natural electric and magnetic fields
Simultaneous measurements of short-period natural electric field variations across western Canada are reported. From these it is indicated that the effect of the varying depth to the Precambrian rocks is the dominant factor. Analysis of the...
Journal of Research of NIST and Predecessor Publications

Simultaneous measurements of specific heat, electrical resistivity, and hemispherical total emittance by a pulse heating technique: hafnium-3 (wt. %) zirconium, 1500 to 2400 K
Electrical resistivity; emittance; hafnium; high-speed measurements; high temperatures; specific heat; thermodynamics
Simultaneous measurements of specific heat, electrical resistivity and hemispherical total emittance of hafnium containing 3.12 weight percent zirconium in the temperature range 1500 to 2400 K by a subsecond duration, pulse heating technique are...
Journal of Research of NIST and Predecessor Publications

Simultaneous measurement of specific heat, electrical resistivity, and hemispherical total emittance of niobium-1 (wt. %) zirconium alloy in range 1500 to 2700 K by a transient (subsecond) technique
Electrical resistivity; emittance; high-speed measurements; high temperature; niobium-zirconium alloy; specific heat; thermodynamics
Simultaneous measurements of specific heat, electrical resistivity, and hemispherical total emittance of niobium-1 (wt. %) zirconium alloy in the temperature range 1500 to 2700 K by a subsecond duration pulse heating technique are described....
Journal of Research of NIST and Predecessor Publications

URSI National Committee Report: Commission 6. Radio Waves and Circuits. Part 1. Information Theory and Coding
Since 1957, there has been considerable progress in the theory of coding messages for transmission over noisy channels. There have been three main directions of advance. First, there has been work on the foundations of the theory. During this time...
Journal of Research of NIST and Predecessor Publications

He-4 thermophysical properties: New ab initio calculations
helium; second virial; theoretical interatomic potential; thermal conductivity; thermophysical standards; transport properties; viscosity
Since 2000, atomic physicists have reduced the uncertainty of the helium-helium "ab initio" potential; for example, from approximately 0.6% to 0.1% at 4 bohr, and from 0.8% to 0.1% at 5.6 bohr. These results led us to: ( 1) construct a new...
Journal of Research of NIST and Predecessor Publications

Interim report on the examination of corrosion damage in homes constructed with imported wallboard: Examination of samples received September 28, 2009
atmospheric corrosion; copper; copper sulfide; household appliances; hydrogen sulfide; indoor atmosphere; sulfide; wallboard
Since many household systems are fabricated out of metallic materials, changes to the household environment that accelerate corrosion rates will increase the frequency of failures in these systems. Recently, it has been reported that homes...
Journal of Research of NIST and Predecessor Publications

Findings and recommendations from the joint NIST-AGA workshop on odor masking
cross-adaptation; odorant conjugation; odorant masking; Zwaardemaker pair
Since the days of the alchemist, the observation that some substances have a smell while other substances do not has been a source of fascination. The sense of smell, or olfaction, is our least understood sense, however it is important for many...
Journal of Research of NIST and Predecessor Publications

A critical review of comparisons of mathematical programming algorithms and software (1953-1977)
Code comparison; comparison of mathematical programming software; evaluation; testing.
Since the introduction of general-purpose computers during the early 1950's, competing techniques of mathematical programming have been developed, analyzed empirically, and compared. In this paper we survey fifty articles (spanning the period...
Journal of Research of NIST and Predecessor Publications

A new method of measuring gage blocks
interference, gage blocks, parallel test interferometer
Since the publication of a description of the parallel testing interferometer it has been discovered that this instrument, without modification, is quite applicable to the comparison of lengths of gage blocks. This note describes the testing of...
Journal of Research of NIST and Predecessor Publications

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