An ultrasonic flowmeter for measuring dynamic liquid flow

A novel oscillating pipe system was developed to provide dynamic calibration wherein small sinusoidal signals with amplitudes of 0.5 to 10% of the steady-state flow were added to the steady-state flow by oscillating the flowmeter relative to the fixed pipes in the flow system. Excellent agreement was obtained between the dynamic velocities derived from an accelerometer mounted on the oscillating pipe system and those sensed by the flowmeter at frequencies of 7, 19, and 30 Hz. Also described were the signal processing techniques used to retrieve the small sinusoidal signals which were obscured by the fluid turbulence

A computer-controlled instrumentation system for third octave analysis

An instrumentation system is described which employs a minicomputer, a one-third octave band analyzer, and a time code/tape search unit for the automatic control and analysis of third-octave data. With this system the information necessary for data adjustment is formatted in such a way as to eliminate much operator interface, thereby substantially reducing the probability for error. A description of a program for the calculation of effective perceived noise level from aircraft noise data is included as an example of how this system can be used

Study of meteoroid detection systems applicable to the outer planets missions

Modifications to the Pioneer 10/11 meteoroid detection experiment to allow it to be used for outer planet missions were investigated. Both pressurized cells and metal-oxide silicon (MOS) penetration detectors are considered. Both the sensors systems and the electronics are treated. Investigation of the calibration and characterization of the MOS penetration detector is reported

IPLIB (Image processing library) user's manual

IPLIB is a collection of HP FORTRAN 77 subroutines and functions that facilitate the use of a COMTAL image processing system driven by an HP-1000 computer. It is intended for programmers who want to use the HP 1000 to drive the COMTAL Vision One/20 system. It is assumed that the programmer knows HP 1000 FORTRAN 77 or at least one FORTRAN dialect. It is also assumed that the programmer has some familiarity with the COMTAL Vision One/20 system

Correlation of electrical conductivity and radiation-induced free radical concentration in poly/ethylene terephthalate/ and related compounds

Gamma and ultraviolet radiation effects on electronic properties of polyethylene terephthalate and related compound

United Kingdom Acid Waters Monitoring Network

This booklet explains the problem of freshwater acidification and introduces the work of the United Kingdom Acid Waters Monitoring Network

Conservation objectives for oligotrophic and dystrophic lake types

To summarise currently available information on conservation requirements of the following three freshwater habitats (from Annex 2 of the EC Habitats Directive): l. Oligotrophic waters containing very few minerals of Atlantic sandy plains with amphibious vegetation: Lobelia, Littorella and Isoetes 2. Oligotrophic to mesotrophic standing waters of plains to subalpine levels of the Continental and Alpine Region and mountain areas of other regions with amphibious vegetation belonging to Littorelletae wziflorae and/or Isoeto-Nanojuncetea 3. Dystrophic lakes • To define conservation objectives based on the requirements of the habitat, outlining: 1. Favourable conditions 2. Attributes (physical, chemical and biological parameters that define favourable condition) 3. Targets (Acceptable range for each attribute) • To assess current monitoring of listed attributes and targets • To identify modifications, or additions, to existing baseline monitoring

Macroinvertebrate classification diagnostic tool development

This project (WFD60) forms part of the UK Strategy for the implementation of the EC Water Framework Directive (WFD: European Union, 2000). Within its broad remit the WFD requires the development of ecological classification tools for the purpose of determining ecological status, with reference to specific environmental pressures. The WFD requires that these tools should assign lakes to one of five categories, (High, Good, Moderate, Poor, Bad) to indicate conditions relative to what is considered to be “good status”. This report focuses on the development of a tool with which to determine the extent of the pressure of acidification on lake macroinvertebrate communities

The United Kingdom Acid Waters Monitoring Network

This booklet explains the problem of freshwater acidification and introduces the work of the United Kingdom Acid Waters Monitoring Network

Study of the use of Metal-Oxide-Silicon (MOS) devices for particulate detection and monitoring in the earth's atmosphere

A metal-oxide-silicon (MOS) capacitor-type particulate sensor was evaluated for use in atmospheric measurements. An accelerator system was designed and tested for the purpose of providing the necessary energy to trigger the MOS-type sensor. The accelerator system and the MOS sensor were characterized as a function of particle size and velocity. Diamond particles were used as particulate sources in laboratory tests. Preliminary tests were performed in which the detector was mounted on an aircraft and flown in the vicinity of coal-fired electric generating plants