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  • Electro-optic characterization of SrS-based alternating current thin-film electroluminescent devices

    Creator:
    Nevers, Corey A.
    Abstract:
    Two methods of electro-optically characterizing alternating-current thin-film electroluminescent (ACTFEL) devices are investigated: photo-induced transferred charge (PIQ) and luminescence (PIL), and subthreshold voltage-induced transferred charge (VIQ) techniques. Both techniques provide information related to traps within the phosphor layer. PIQ/PIL experiments monitor the transport of electrons and holes across the phosphor layer...
    Resource Type:
    Masters Thesis
    Full Text:
    degree of Master of Science in Electrical and Computer Engineering presented on April 30, 1999. Title

  • The fabrication of fiber Bragg gratings

    Creator:
    Stump, Kurt
    Abstract:
    Fiber Bragg gratings have become an important element in the fields of telecommunications and fiber optical sensing. Their small size, light weight and high tunability have made them ideal for many unique applications. In this paper the fabrication of these devices is investigated. Following a review of current literature and...
    Resource Type:
    Masters Thesis
    Full Text:
    THESIS OF Kun Stump for the degree of Master of Science in Physics presented on June 30. 2000. Title

  • Wide stripe, high power diode lasers

    Creator:
    Parson, Kevin J.
    Abstract:
    Typical power outputs of commercially available diode lasers are on the order of 5 milliwatts. This thesis discusses the growth, processing and fabrication of high power (lOO's of milliwatts) diode lasers. Devices were grown by Molecular Beam Epitaxy (MBE) and by Metal Organic Chemical Vapor Deposition (MOCVD). The MOCVD diode...
    Resource Type:
    Masters Thesis
    Full Text:
    Engineering presented on March 30, 1992. Title: Wide Stripe, High Power Diode Lasers. Abstract approved

  • Methodology for cuticular identification of selected eastern Oregon range plants

    Creator:
    Schrumpf, Barry J.
    Abstract:
    Animal dietary preferences have been studied by feeding-site examinations, animal observation, and stomach and esophageal collections. Analysis of fecal material for undigested plant cuticle is another means for obtaining the same information. This study was conducted to: (1) prepare a microscope slide series depicting the surface features of leaves and...
    Resource Type:
    Masters Thesis
    Full Text:
    eastern Oregon range plants, (2) develop a key to identification of these plant surfaces using slides

  • Forage utilization estimates in relation to ecological units in the Wallowa mountains of northeastern Oregon

    Creator:
    Johnson, Walter Van-Gale
    Resource Type:
    Masters Thesis
    Full Text:
    . Root distribution classes. 7. Relation of key species, key areas, plant communities and range types

  • Fabrication and characterization of p-type CuO / n-type ZnO heterostructure gas sensors prepared by sol-gel processing techniques

    Creator:
    Ravichandran, Ram
    Abstract:
    Increased interest in the field of sensor technology stems from the availability of an inexpensive and robust sensor to detect and quantify the presence of a specific gas. Bulk p-CuO/n-ZnO heterocontact based gas sensors have been shown to exhibit the necessary sensitivity and selectivity characteristics, however, low interfacial CuO/ZnO contact...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: Thomas K. Plant Increased interest in the �eld of sensor technology stems from the

  • Evaluation of dry-weight-rank and microscopic point techniques for seasonal botanical analysis of two pasture mixtures

    Creator:
    Bauer, Welby
    Abstract:
    This study was undertaken to evaluate the dry-weight-rank and microscopic point methods for determining botanical composition on perennial ryegrass (Lolium perenne L.) - subclover (Trifolium subterraneum L.) and tall fescue (Festuca arundinacea Schreb.) - subclover pasture mixtures throughout a grazing season. Botanical composition was determined on a monthly basis from...
    Resource Type:
    Masters Thesis
    Full Text:
    made up at least 30% weight of the masticated plant mixtures. The reliability of estimating a species

  • Evaluation of species composition by four methods on two perennial grass pastures (Festuca arundinacae Schreb. and Lolium perenne L.) grazed lightly and heavily in western Oregon

    Creator:
    Pessot Zorich, Rafael
    Abstract:
    The present study was undertaken to evaluate the seasonal botanical composition of two grass pastures, tall fescue (Festuca arundinacea Schreb.) and perennial ryegrass (Lolium perenne L.). Botanical composition was determined by four methods: dry-weight-rank, weight-estimate, hand separation, and the constituent differential, with cattle and sheep grazing at two intensities. The...
    Resource Type:
    Masters Thesis
    Full Text:
    Western Oregon AN ABSTRACT OF THE THESIS OF Rafael Pe s sot Zorich for the M S. in Range Management

  • Grating-tuned external cavity diode lasers

    Creator:
    Falconer, Beate Stephan
    Abstract:
    Diode lasers have many advantages such as small size, high efficiency and small angular dispersion of the collimated beam. However they also have some problems like lack of frequency stability. They can not be tuned in wavelength. An external cavity can solve these problems and decrease the laser linewidth. To...
    Resource Type:
    Masters Thesis
    Full Text:
    approved : Prof Dr. Thomas K. Plant Diode lasers have many advantages such as small size, high efficiency

  • Fiber Bragg grating-tunable diode laser

    Creator:
    Ericksen, Doug
    Abstract:
    Continuously tunable diode laser sources coupled to single-mode fiber are useful sources for fiber Bragg grating (FBG) strain sensors. This paper describes the development and fabrication of such a device. An introduction is given describing applications of tunable lasers and some of the different methods of creating a tunable diode...
    Resource Type:
    Masters Thesis
    Full Text:
    : _______________________________________ Thomas K. Plant Continuously tunable diode laser sources coupled to single-mode fiber