1,231 research outputs found

    Letter to Ruth Weeks concerning information on SEAALL for students, January 21, 1994

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    A letter from Keith Norman thanking Ruth Weeks for sending information on SEAALL and detailing plans to spread the information to students

    Line narrowing of AgGaSe2 optical parametric oscillator by injection seeding

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    Solid-state lasers are developed for atmospheric applications. Optical parametric oscillators (OPO) are being investigated as sources of tunable radiation in the 2.5-12 micron range where development of conventional lasers is subject to numerous difficulties. Parametric oscillation is a nonlinear optical technique for converting laser output to longer wavelengths. Incident photons, typically from a pulsed pump laser, are converted into two photons of longer wavelength, while satisfying energy conservation. The particular split of energy is determined by momentum conservation; the wavelength of interest is usually selected by angle orientation of the nonlinear material with respect to the direction of propagation of the pump beam. An OPO based on AgGaSe2 was considered

    The Development of a Comprehensive Long Range Plan to Determine the Financial Facility and Program Needs for the Iowa School for the Deaf Council Bluffs, Iowa

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    Everyone concerned, including parents of deaf children, educators of the deaf, board members, legislators, and eventually the deaf person himself wants the same thing. That is the best possible education for each deaf child. In order to provide programs that will insure this end, there is a need for a well thought out long-range plan of action. Traditionally, long-range planning by schools has been concerned with certain quantitative aspects of operation: enrollment projections, facility needs, current income, current expenditures, and variations of these quantities. The emphasis in this study was that resource planning dominated attention

    The Food Habits of the Red Fox and Gray Fox in Louisiana with Notes on Reproduction and Parasitism

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    Stomach contents of 54 red foxes ( Vulpes vulpes) and 20 gray foxes (Urocyon cinereoargenteus) were examined to detennine food habits, In both species, rodents, rabbits (Sylvilagus sp .), insects, and blackberries (Rubus sp.) were the most frequently occurring foods. There were no cases of predation on iame birds other than 1 Canada Goose (Branta canadensis) found in a red fox from Cameron Parish. Only 1 occurrence of predation on domestic chicken (Gallus gallus) and 2 occurrences of predation on domestic goat (Capra hircus) were noted. The reproductive condition of females of both species was examined. The average number of placental scars in 19 female red foxes was 5,J and ranged from 2 to 8. The average number of placental scars in 7 female gray foxes was 3,9 and ranged from 2 to 7, Ages of 23 red foxes ranged from 1 to 4 years based on cementum annuli counts. The average age was 1,53 years. Only 4 gray foxes, 3 that were 1 year old and 1 that was J years old, were aged. Heartwonns (Dirofilaria immitis) were found in 5 of Jl red foxes and 2 of 20 gray foxes, Stomach worms (Physaloptera sp.) were present in 4 red foxes and 1 gray fo

    Supporting the Everyday Work of Scientists: Automating Scientific Workflows

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    This paper describes an action research project that we undertook with National Research Council Canada (NRC) scientists. Based on discussions about their \ud difficulties in using software to collect data and manage processes, we identified three requirements for increasing research productivity: ease of use for end- \ud users; managing scientific workflows; and facilitating software interoperability. Based on these requirements, we developed a software framework, Sweet, to \ud assist in the automation of scientific workflows. \ud \ud Throughout the iterative development process, and through a series of structured interviews, we evaluated how the framework was used in practice, and identified \ud increases in productivity and effectiveness and their causes. While the framework provides resources for writing application wrappers, it was easier to code the applications’ functionality directly into the framework using OSS components. Ease of use for the end-user and flexible and fully parameterized workflow representations were key elements of the framework’s success. \u

    Impact on Base Population Density and Hunter Performance of Stocking with Pen-Raised Bobwhite

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    In 1962, the Kansas Fish and Game Commission initiated an investigation to determine the effect of semiannual releases of pen-raised bobwhite quail (Colinus virginianus) on population densities of native wild quail populations, on availability of birds to hunters, and on hunter success.Stocking during spring resulted in 7% fewer birds in the fall population on the stocked area than on the control area. Stocking during fall resulted in 14% more birds, at the time hunting season began, on the stocked area than on the control area. Neither of these differences were statistically significant, and it is concluded that there was no significant difference attributable to stocking between population densities of stocked and control areas. On the stocked area, however, there was a significant net increase of 25% in population density between the fall census period and the preseason census period. It is concluded that the density-depressing influence of spring stocking combined with the density-elevating influence of fall stocking, on the stocked area, produced a significant increase, attributable to stocking, between the population density preceding fall release and the population density preceding the hunting season. It is further concluded that in the comparison of preseason population densities for the treatment and control areas, the depressing effect of spring stocking and the elevating effect of fall stocking resulted in a treatment-area population that was significantly larger than that found on the unstacked control area.Some pen-raised birds established themselves as a part of the population on the stocked area, but there was not a proportional increase in population density. There were fewer native quail on the area when treated with semiannual stocking than when under control condition. The difference in density of native birds between stocked and control areas was not statistically significant. Stocking significantly increased hunter success by 30% and 35% on areas in Cherokee and Linn Counties, respectively, but the number of coveys flushed per hour was not significantly increased by stocking pen-raised quail

    AN IRRIGATION MODEL FOR MANAGEMENT OF LIMITED WATER SUPPLIES

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    A two-stage simulation/mathematical programming model is presented for determining the optimal intraseasonal allocation of irrigation water under conditions of limited water supply. The model is applied to a series of water shortage scenarios under both surface and center pivot irrigation. Economically efficient irrigation management is shown to involve the coordination of a number of managerial decisions, including irrigation scheduling, crop substitution, the adoption of improved irrigation labor practices, and idling land. The results indicate that significant opportunities exist for conserving water in the study area under both surface and center pivot irrigation.Crop Production/Industries, Resource /Energy Economics and Policy,
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