Paper Session III-C - Moving Knowledge Based Systems to Meet Critical Operations & Commercialization

The dream of creating dual-use technologies, or those transferred from their original environment to another, has existed for a number of years. The dream has been especially strong for those technologies of an advanced nature such as knowledge-based tools. In our technology explosive era, transfer has been facilitated both by a systematic process called “Concurrent Lab to Market” and by the opportunities inherent in contract consolidation and budget pressure. But successful implementation cases in which high technology solutions are actually deployed and commercialized are very rare

A Note on the Increase in Flake Size of Aphanizomenon Flos-Aquae (L) Ralfs

Aphanizomenon flos-aquae is a blue green alga which forms a conspicuous part of the algal bloom in many of Iowa\u27s lakes. It is associated with species of Anabaena and Microcystis; these three genera being widely known as Fanny, Anny and Mike . The compound colonies of Aphanizomenon, which consist of hundreds of laterally coherent filaments lying in approximately one plane, have the macroscopic appearance of lawn grass clippings floating in the water. Although this organism is well known and has been well described, a somewhat spectacular aspect of its growth and reproduction is not touched upon in discussions which are readily available. Rose (1934) described spore germination and early flake formation under laboratory conditions. Shortly after germination, groups of filaments were observed to be coherent in the form of small flakes. During a discussion with Mr. Rose, in the summer of 1952, he indicated that he had never had an opportunity to analyze satisfactorily the method by which these microscopic flakes increased in size to the macroscopic forms which consist of hundreds of filaments. Since this organism has an economic significance, it seemed that this aspect of the growth of A. flos-aquae might be examined further

Electrical breakdown and structural characterization in synthetic resins using optical techniques

As part of a National Power/National Grid funded collaborative project on electrical breakdown in synthetic resins, various non-evasive optical techniques were developed to quantitatively characterise resin microstructure and residual internal mechanical (RIMS) and to study the physical processes occurring during electrical tree initiation and tree growth in the pin-plane geometry. Light scattering measurements have been used to determine the origins and magnitudes of the microstructure content (MC) of the Epoxy (CT200) and unsaturated polyester rains, and in conjunction with FTIR spectroscopy, the polyester resin cure reaction kinetics have been established. Polarisation microscopy with the aid of an interpretive fictive force model have enabled the RIMS to be quantified for the first time. It is shown that the RIMS relaxes with a time constant of some four years for CT200 and polyester rains and is associated with structural relaxation (physical ageing). The large variations of MC and RIMS depend on the supplied material, preparation procedures, sample age etc., and have important ramifications for any study of electrical tree initiation and growth. Light emission measurements, using phase synchronous photon counting and CCD imaging during tree initiation and growth shows that three distinct types of emission occur. Type A; associated with charge injection processes which may be explained in terms of a deep trap charge recombination model. Type B; with microdischarges as a prelude to tree propagation and Type C; associated with the conventional partial discharge activity in growing tree channels. Electrical tree initiation follows slow material degradation and debonding of the metal/polymer interface with the formation of the first microchannels. A study of tree initiation and growth in the CY1311 epoxy resin details some of the many factors that influence electrical breakdown in resins. The early tree growth is shown to be driven by the high electrical field near the pin tip, which is itself dependent on the pin-plane electrode separation as well as the applied voltage. Significantly, at least two different tree growth mechanisms occur and compressive mechanical stress acts to retard tree initiation. Tree growth may also be impeded by high compressive or tensile mechanical stress and a region of zero RIMS may completely passivate a growing tree

Toward special services - minus prejudices

All children in rural education should receive health, vocation, leisure and citizenship education, regardless of any handicap conditions

Biological control of Paterson\u27s curse

The long- delayed biological control programme for the weed Paterson\u27s curse (Echium plantagineum) has begun with the release of the leaf mining moth (Dialectica scalariella)\u27 an insect slightly bigger than a mosquito. Yhe caterpillar stage of the moth feeds inside the leaves, producing tunnels and chambers which damage the leaf. The leaf mining moth has already become established in suitable areas. Although the familiar purple haze of Paterson\u27s curse will continue to be seen for years to come, we expect that the leaf mining moth - and other agents yet to be released - will make it a more manageable weeed and less of a curse

Letter to Theodore M. Kaufman from Jack B. Dodd, March 22, 1978

Handwritten letter to Theodore M. Kaufman from Jack B. Dodd (John Bruce Dodd, Jr.), concerning the death of Sonora Dodd (Mrs. John Bruce Dodd, Jack\u27s mother). Theodore M. Kaufman served as Executive Director of the Father\u27s Day Council, New York.https://digitalcommons.whitworth.edu/fathers-day-correspondence/1191/thumbnail.jp

The potential for skeleton weed

Since its introduction into Australia during the 900s skeleton weed has become one of the most economically significant weeds. Its presence in cereal crops in south-eastern Australia has caused suvere yield reductions and harvesting problems. Skeleton weed was first found on a Western Australian farm in 963. Since then it has been the subject of an intensive eradication campaign organised by the Agricultural Protection Board and funded by an annual levy on wheat growers. Such campaigns, which rely mainly on volunteer searchers, do not exist in eastern Australia because the weed is so widespread it would be impossible to eradicate. Studies conducted by the Weed Agronomy research officers, FD Panetta and J Dodd have led to a greater understanding of the biology and porential of skeleton weed in Western Australia. The following article is a sequel to their earlier article in the Journal of Agriculture (Panetta and Dodd 1984) and assesses what influences the establishment and spread of skeleton weed in this State

Algae From the Warm Pools of Silver Lake Fen

A description of the physical features, including a chemical water analysis, is given. Collections were made during the summer of 1959 and comprise a list of 23 species of algae