Low-Voltage Room Thermostat Performance (open access)

Low-Voltage Room Thermostat Performance

Report issued by the National Bureau of Standards over low voltage electric thermostats. Thermostat test results are discussed. This report includes illustrations, and photographs.
Date: April 1983
Creator: Kao, James Y.; Sushinsky, George; Didion, David A.; Mastascusa, E. J. & Chi, Joseph
System: The UNT Digital Library
Turbulent Wind Effects on Tension Leg Platform Surge (open access)

Turbulent Wind Effects on Tension Leg Platform Surge

Report issued by the National Bureau of Standards on "surge response to turbulent wind in the presence of current and waves" (p. iii). Methods for estimating surge response are discussed. This report includes tables, graphs, and illustrations.
Date: March 1983
Creator: Simiu, Emil & Leigh, Stefan D.
System: The UNT Digital Library
A Daylighting Model for Building Energy Simulation (open access)

A Daylighting Model for Building Energy Simulation

Report issued by the National Bureau of Standards over the energy performance of a day-lighted building. The different models and functions are discussed. This report includes tables, graphs, illustrations, and photographs.
Date: March 1983
Creator: Gillette, Gary
System: The UNT Digital Library
Wind Loading and Strength of Cladding Glass (open access)

Wind Loading and Strength of Cladding Glass

Report issued by the National Bureau of Standards over studies conducted on glass cladding behavior under wind loads. Procedures for investigating cladding behavior are discussed. This report includes graphs, illustrations, and photographs.
Date: May 1983
Creator: Reed, Dorothy A. & Simiu, Emil
System: The UNT Digital Library
Computer Modeling of the Vapor Compression Cycle with Constant Flow Area Expansion Device (open access)

Computer Modeling of the Vapor Compression Cycle with Constant Flow Area Expansion Device

Report issued by the National Bureau of Standards over studies conducted on vapor compression cycles. Methods of operation are discussed. This report includes graphs, illustrations, and photographs.
Date: May 1983
Creator: Domanski, Piotr & Didion, David A.
System: The UNT Digital Library
Annual Variation of Temperature Field and Heat Transfer Under Heated Ground Surfaces (Slab-on-Grade Floor Heat Loss Calculation) (open access)

Annual Variation of Temperature Field and Heat Transfer Under Heated Ground Surfaces (Slab-on-Grade Floor Heat Loss Calculation)

Report issued by the National Bureau of Standards over studies conducted on sub-surface temperatures and heat transfer. Testing methods are discussed. This report includes tables, and illustrations.
Date: June 1983
Creator: Kusuda, Tamami; Piet, O. & Bean, J. W.
System: The UNT Digital Library
General Guidelines for the On-Site Calibration of Humidity and Moisture Control Systems in Buildings (open access)

General Guidelines for the On-Site Calibration of Humidity and Moisture Control Systems in Buildings

Report issued by the National Bureau of Standards over calibration of indoor humidity and moisture control. Guidelines used for on-site calibration are discussed. This report includes tables, graphs, and illustrations.
Date: September 1983
Creator: Hyland, Richard W. & Hurley, C. Warren
System: The UNT Digital Library
Errata Sheet Number 1 for National Bureau of Standards Building Science Series 144, September 1983 (open access)

Errata Sheet Number 1 for National Bureau of Standards Building Science Series 144, September 1983

Errata sheet for a report issued by the National Bureau of Standards containing corrections to be added to NBS Bulletin 144.
Date: January 19, 1983
Creator: Crenshaw, Richard & Clark, Roy E.
System: The UNT Digital Library
Evaluation of Construction Loads in Multistory Concrete Buildings (open access)

Evaluation of Construction Loads in Multistory Concrete Buildings

Report issued by the National Bureau of Standards over construction loads of multistory concrete buildings. Evaluations of the construction loads are discussed. This report includes illustrations, and photographs.
Date: February 1983
Creator: Fattal, S. G.
System: The UNT Digital Library
Picosecond Time Difference Measurements Utilizing CAMAC-Based ANSI/IEEE-488 Data Acquisition Hardware : Operating Manual IE3, Version 1.0 (open access)

Picosecond Time Difference Measurements Utilizing CAMAC-Based ANSI/IEEE-488 Data Acquisition Hardware : Operating Manual IE3, Version 1.0

Abstract: Automated time-difference measurements at the picosecond level have been achieved. The system described combines the best properties of three common methods: the single heterodyne measurement technique, the frequency divider, and the dual-mixer time-difference measurement system. This particular system combines two instrumentation standards, ANSI/IFEE-583 and ANSI/IEEE-488 with new, modular dual-mixer time-difference measurement hardware. The modular, standardized hardware together with the new measurement techniques permit the data acquisition modules to be contained in a standard CAMAC crate. This system, along with an external controller, is capable of measuring eiqht clocks, at the present time, and is expandable to twenty-four clocks with modified software and additional measurement modules. The system noise performance is described by a (rT = 3 x 10^-12 t^-1 for time difference measurements.
Date: August 1983
Creator: Glaze, D. J. & Stein, S. R.
System: The UNT Digital Library
An Electric and Magnetic Field Sensor for Simultaneous Electromagnetic Near-Field Measurements -- Theory (open access)

An Electric and Magnetic Field Sensor for Simultaneous Electromagnetic Near-Field Measurements -- Theory

Abstract: This paper describes the theory of a single sensor to perform simultaneous electric and magnetic near-field measurements. The theory indicates that it is possible to obtain the magnetic-loop and electric-dipole currents using a loop terminated with identical loads at diametrically opposite points. The theory also indicates that it is possible to obtain an ideal load impedance for achieving equal electric and magnetic field responses of the loop. Preliminary experiments have been performed using plane waves to verify these results. Key words: electric field, electromagnetic interference, electromagnetic radiation, loop, magnetic field, near fields.
Date: April 1983
Creator: Kanda, Motohisa
System: The UNT Digital Library
The Characteristics of Iris-Fed Millimeterwave Rectangular Microstrip Patch Antennas (open access)

The Characteristics of Iris-Fed Millimeterwave Rectangular Microstrip Patch Antennas

From introduction: The fabrication of various iris-fed millimeterwave rectangular microstrip patch antennas is described. A model is proposed to describe the iris-fed antenna. Irises ranging in size from 15 percent of the area of the patch to the fully open waveguide are used to couple energy into the antenna. Resonance of the antenna is observed to be insensitive to the size of the iris for irises up to 115 percent of the size of the patch. A study is also made of th? relationship of coupling to the antenna as a function of position of the iris with respect to the transverse plane of the waveguide, the iris always being centered with respect to the patch. In general, the antenna has a VSWR in the waveguide feed on the order of 5:1 at resonance, except for the fully open waveguide which gives rise to a VSWR of 2.9:1 at resonance. Far-field antenna power patterns are observed to be quite broad with H-plane beamwidths on the order of 1300. Maximum antenna gain is seen to be 4.5 dBi with 3 dBi typical. An initial study is made of the microstrip patch antenna fed from a longitudinal waveguide wall. Results indicate that …
Date: October 1983
Creator: Greenlee, D. H.; Kanda, Motohisa & Chang, David C.
System: The UNT Digital Library
Optical Time-Domain Reflectometer Performance and Calibration Studies (open access)

Optical Time-Domain Reflectometer Performance and Calibration Studies

from Introduction: The measurement accuracy of the optical time-domain reflectometer (OTDR) is restricted in some applications by a limited operational dynamic range and by a lack of standardized test procedures. In an effort to better understand these restrictions, we have measured the range of linearity of some avalanche photodiodes used as backscatter detectors. Also, the effect of input launch conditions is examined and a possible standardized OTDR test procedure is proposed. Using these suggestions, we have made comparisons between attenuation values determined by cutback and backscatter methods and found that good agreement is possible. Finally, some methods are described for checking the response. linearity of OTDR systems.
Date: June 1983
Creator: Danielson, B. L.
System: The UNT Digital Library
Reference Flat Pulse Generator (open access)

Reference Flat Pulse Generator

Introduction: A reference step-like pulse generator is described which has been developed at NBS. This generator can be used for accurately characterizing the step response of various kinds of trap ient recording equipment (oscilloscopes, waveform recorders, transient digitizers, etc.). Basic design principles are given as well as complete circuit diagrams and descriptions. An analysis of the output stage of the generator is presented together with the circuit models for developing a time-domain computer simulation program using extended- SCEPTRE. Preliminary specifications indicate that the NBS Reference Flat Pulse Generator provides a negative-going reference transition duration (90 to 10 percent) of 600 ps, *20 percent with baseline perturbations of less than *2 percent for less than 5 ns.
Date: October 1983
Creator: Andrews, J. R.; Bell, B. A. & Baldwin, E. E.
System: The UNT Digital Library
Introduction to STARPAC: the Standards Time Series and Regression Package (open access)

Introduction to STARPAC: the Standards Time Series and Regression Package

From preface: STARPAC documentation is being published as a series of Technical Notes. This Note is the first in the series. It gives an overview of the STARPAC library, defines conventions used in the documentation, provides an example using STARPAC subroutines, and presents general background material. This Note includes information which is essential for using the STARPAC library, and users should be familiar with its contents before attempting to use any STARPAC subroutine.
Date: October 1983
Creator: Donaldson, Janet R. & Tryon, Peter V.
System: The UNT Digital Library
Nonlinear Least Squares Regression Using STARPAC: The Standards Time Series and Regression Package (open access)

Nonlinear Least Squares Regression Using STARPAC: The Standards Time Series and Regression Package

From preface: This Note documents 16 subroutines for nonlinear least squares regression. Twelve of these compute the least squares estimates, performing either weighted or unweighted analysis with either numerically approximated or user-supplied (analytic) derivatives. The other four are user-callable subroutines for two procedures used within the estimation code: the first selects optimum step sizes for approximating the partial derivatives of the model; and the second checks the validity of a user-supplied derivative subroutine.
Date: October 1983
Creator: Donaldson, Janet R. & Tryon, Peter V.
System: The UNT Digital Library
A Review of Supercritical Fluid Extraction (open access)

A Review of Supercritical Fluid Extraction

Forward: The purpose of this report is to summarize the results obtained from a brief investigation of supercritical fluid extraction principles and applications. This study was one portion of a project funded by the U.S. Department of Energy, Office of Fossil Energy, contract nuriber DE-AI01076PR06010, in response to a preliminary proposal submitted by the authors. This report sometimes uses company trade naries to identify processes and patent holders. This usage implies no endorsement by HBS. Note also that some figures reproduced from other sources do not conform with NBS policy concerning SI units.
Date: December 1983
Creator: Ely, James F. & Baker, Jolene K.
System: The UNT Digital Library
Phase Equilibria: an Informal Symposium (open access)

Phase Equilibria: an Informal Symposium

From introduction: The accurate prediction of phase equilibria plays an important. role in the chemical process industries. A grief overview of final phase equilibria predictive techniques is presented with special emphasis on methods in current use in industry. Areas were better fundamental understanding will lead to improved models are discussed whenever possible.
Date: January 1983
Creator: Eaton, B. E.; Ely, James F.; Hanley, H. J. M.; McCarty, Robert D. & Rainwater, James C.
System: The UNT Digital Library
Design and Error Analysis for the WR10 Thermal Noise Standard (open access)

Design and Error Analysis for the WR10 Thermal Noise Standard

From introduction: This note describes the design and error analysis of a WR10 thermal noise power standard. The standard is designed to operate at the boiling point of liquid nitrogen with a noise temperature accurate to plus or minus 1 K.
Date: December 1983
Creator: Daywitt, William C.
System: The UNT Digital Library
Proceedings of the Joint Panel Conference of the U.S.-Japan Cooperative Program in Natural Resources: 1982 (open access)

Proceedings of the Joint Panel Conference of the U.S.-Japan Cooperative Program in Natural Resources: 1982

Abstract: The 14th Joint Meeting of the U.S. - Japan Panel on Wind and Seismic Effects was held in Washington, D. C., United States front May 17 through 20, 1982. This publication, which is the proceedings of the Joint Meeting, includes the program, list of members, formal resolutions, technical papers, and the task committee report:. Subjects covered in the papers presented to the panel include: (l) characteristics of strong winds, (2) wind loads on structures and design criteria, (3) earthquake ground motions and dynamic analysis of embankment dams, (4) soil liquefaction study and methods to improve liquefaction resistance. (5) seismic loads on structures and design criteria, (6) stress analyses of pipelines during earthquakes, (7) full-scale seismic experiments, (8) earthquake hazard reduction program, (9) use of microcomputer for earthquake studies, (10) quantitative evaluation of damages caused by winds and earthquakes, and (11) tsunami research projects.
Date: April 1983
Creator: United States-Japan Cooperative Program in Natural Resources. Panel on Wind and Seismic Effects.
System: The UNT Digital Library
Annual Report and Directory of Accredited Laboratories: 1982 (open access)

Annual Report and Directory of Accredited Laboratories: 1982

Annual report describing the activities and goals of the National Voluntary Laboratory Accreditation Program (NVLAP) during 1982, and a directory list of laboratories including the test methods for which they are accredited.
Date: September 1983
Creator: NVLAP (Program : U.S.)
System: The UNT Digital Library
Ozone Reactions in Aqueous Solutions: a Bibliography (open access)

Ozone Reactions in Aqueous Solutions: a Bibliography

Abstract: A reaction oriented list of references is provided for published papers and reports containing rate data or information on mechanism for reactions of ozone with various substrates in aqueous solutions. Catalyzed, as well as uncatalyzed, reactions are included. One hundred and sixty-four papers are listed. The period covered extends from 1913 to 1981.
Date: August 1983
Creator: Westley, Francis
System: The UNT Digital Library
Low-Sloped Roofing Research Plan (open access)

Low-Sloped Roofing Research Plan

Abstract: This report presents a long-range plan for roofing research. The plan was developed in response to a need for roofing research addressing major materials problems and changes in low-sloped roofing materials technology. The intent of the plan is to establish the technical basis for developing standards and minimum levels of performance to assist in the selection of cost-effective and durable roofing materials. Four major areas of needed research are identified: (1) low-sloped roofing systems, (2) roofing membranes including single-ply and built-up, (3) thermal insulation for roofing systems, and (4) condition assessment and repair of roofs. Within each research area, a goal is given as well as a number of objectives to achieve the goal. A recommended approach to accomplish each objective is also given.
Date: July 1983
Creator: Cullen, William C.; Rossiter, Walter J., Jr.; Mathey, Robert G. & Clifton, James R.
System: The UNT Digital Library
Measurement & Analysis of Productivity Growth: a Synthesis of Thought (open access)

Measurement & Analysis of Productivity Growth: a Synthesis of Thought

Abstract: Productivity is one of the most important factors influencing our economic well-being. Productivity growth is essential to a higher standard of living and is vital to a sound economic and political environment. However, there has been a slowdown in the growth of productivity in the United States since the mid-1960s. This slowdown has caused concern among policy makers and researchers. Accordingly, several questions persist both in policy and academic circles. Why has productivity been slowing? and What can be done to reverse this trend? The purpose of this report is to address broadly the first of these two questions by surveying and synthesizing the vast literature on the measurement and determinants of productivity. This review is intended to be a source document for those interested in the measurement and analysis of productivity growth. The report is divided into five sections. In the first section, the importance of productivity growth on economic activity is discussed. In the second section, the so called "facts" about patterns of measured productivity growth in the United States are presented. In the third section, the methods currently used for calculating productivity indices are summarized. In the fourth section, the literature related to the determinants of …
Date: September 1983
Creator: Link, Albert N.
System: The UNT Digital Library