430 research outputs found

    Natural Resources Research Institute Technical Report

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    Part II, Technical Report, NRRI/TR-87-3, December 1987The study objective was to analyze prospects for manufacturing wood products in Minnesota using birch in small scale and cottage industries. The current status of Minnesota's birch-based industry is described indicating that low valued firewood is 60 percent of consumption and the majority of the remaining consumption is in sawbolts. In secondary manufacturing most birch is used in low value-added products. Cottage industry is defined in several ways, but by any definition Minnesota has been effective in developing this segment. Some of Minnesota's cottage industry is using wood as a raw material. Three successful companies are profiled; a classic cottage industry, a small home-based cooking utensil manufacturer and a small wood products manufacturer. Each of these uses wood to a greater or lesser degree. There are good prospects for increasing the use of wood, including birch, in companies of this type. A discussion of challenges is presented and specific recommendations made. The profiled cottage industry would serve as a model for further expansion. Creation of a Minnesota wood turning industry should be explored. Establishment of a prototype manufacturing shop would help existing and new operations.Blandin Foundation, Grand Rapids, Minnesota; Natural Resources Research Institute, University of Minnesota, Duluth 3151 Miller Trunk Highway, Duluth , Minnesota 55811Wood, Joseph C; Edwardson, Christian F; Adams, Roy D. (1987). Birch Products from a Cottage Industry in Minnesota. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/193684

    Valet av Klassrumsmöblering - Vad utgår lärarna ifrån?

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    Sammanfattning: Syftet med vår undersökning är att ta reda på vad lärare utgår ifrån när de väljer hur de skall möblera bänkar och bord i klassrummet. Vi vill med detta synliggöra vilka grunder de baserar sitt beslut på och se hur detta förhåller sig till tidigare forskning och litteratur inom ämnesområdet. Vårt material består i huvudsak av intervjuer med lärare samt vetenskaplig litteratur och andra texter som vi anser är relevanta för vårt ämne. Vi har använt oss av samtalsintervjuer i undersökningen i syfte att ta reda på lärarnas egna tankar och utgångspunkter för möblering. I undersökningen framkom en mängd olika aspekter på vad lärare utgår ifrån och vi har i undersökningen visat på hur dessa på olika sätt relaterar till forskning och litteratur inom området. Vår förhoppning är att denna under- sökning bidrar till att öka medvetenhet och reflektion kring valet av klassrumsmöbleringen och att detta därmed kan resultera i positiva konsekvenser för elevernas lärandemiljö. Vi tror att genom att synliggöra olika aspekter och undersöka hur de relaterar till forskning bidrar till ökad medvetenhet och reflektionen vilket förhoppningsvis leder till bättre lärandemiljö för eleverna

    Energy and post-production systems : the IDRC program

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    Meeting: Seminar on Energy Conservation in Food Processing Industries, 26 May 1982, Ottawa, ON, C

    Investigación para mejorar la pequeña industria alimenticia en países en vía de desarrollo : proyectos apoyados por el CIID

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    Reunión: Seminario Latinoamericano de Ciencia y Tecnología de Alimentos, 13-16 oct. 1985, Viña del Mar, C

    Applied research methodology

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    Meeting: IDRC Research Management Symposium, 4-6 Oct. 1982, Ottawa, ON, C

    Nanoparticle dynamics in simple fluids

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    The Stokes-Einstein relation is considered a benchmark in the transport of small particles in fluids, predicting an increase in diffusion with decreasing particle size. However, there is doubt about its validity at the nano-scale where some theoretical studies have predicted deviations from it. Experimental data from single nanoparticle tracking are presented in this thesis, collected using a recently-developed technique based on the optical phenomenon of caustics to detect the particle in a conventional inverted optical microscope. Experiments were performed on gold and polystyrene nanoparticles dispersed in water and glycerol-water mixtures, with viscosities ranging from 0.00008 to 0.15 Pa·s, to investigate the effect of nanoparticle size, density, concentration, and liquid viscosity on diffusion rates at a fixed temperature of 30°C. It is shown that below a critical concentration and critical size of particle diffusion falls orders of magnitude below the Stokes-Einstein prediction and it is better represented by the fractional Stokes-Einstein relation. At these experimental conditions, the diffusion coefficient was found to be constant with particle size and independent of material, but dependent on fluid viscosity. This thesis is aimed at enriching the knowledge on nanoparticle motion in simple fluid. The validity of the Stokes-Einstein diffusion at the nanoscale is addressed by experiments, within the context of simple, isotropic fluids
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