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Filtering by: Creator Peck, David V. Remove constraint Creator: Peck, David V. Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • π-line reconstruction formulas in computed tomography

    Creator:
    Hass, Ryan Andrew
    Abstract:
    X-ray computed tomography is a noninvasive imaging modality capable of reconstructing exact density values of 3D objects. Computed tomography machines are deployed across the world to provide doctors with an image that reveals more detail than a standard x-ray image. We investigate algorithms based on exact computed tomography reconstruction formulas...
    Resource Type:
    Dissertation
    Full Text:
    reconstructed function is (2.68) with x0 = (−1,−1), u = .3, v = .3,m = 3 and ψ = 0. . . . . 74 4.2 Construction

  • Zooplankton of the Galapagos Islands

    Creator:
    Figueroa, Diego
    Abstract:
    The marine climate of the Galapagos is spatially and seasonally heterogeneous. A taxonomically comprehensive study of Galapagos zooplankton has never been done. This study is an initial effort to establish the distribution and community structure of zooplankton in the Archipelago. I collected zooplankton samples by vertical tows over the Galapagos...
    Resource Type:
    Dissertation
    Full Text:
    . Strub and Michael V. Oriard. I would like to thank the Galapagos National Park Service for their

  • Zooplankton and hydrography of Alsea Bay, Oregon, September 1966 to September 1968

    Creator:
    Matson, Adrian Luther
    Resource Type:
    Dissertation
    Full Text:
    ) from September 8, 1967, to September 8, 1968. 4 Newport, Oregon, Weather Bureau U- and V-component

  • Zoogeography of pelagic shrimps (Natantia: Penaeidea and Caridea) in the North Pacific Ocean

    Creator:
    Wasmer, Robert Allen
    Abstract:
    A study was done on the zoogeography of species of oceanic shrimp in the North Pacific from 22°N to 56°N and from 124°W to 145°E, using samples of shrimp collected from 1954 to 1969. These collections were made during the following cruises: John R. Manning Cruise 22, and the Hugh...
    Resource Type:
    Dissertation
    Full Text:
    ), the SICS-PAC and YALOC 66 cruises of the R/V Yaquina of the Department of Oceanography, Oreggn State

  • Zoogeography and systematics of cephalopods of the northeastern Pacific Ocean

    Creator:
    Jefferts, Katharine
    Resource Type:
    Dissertation
    Full Text:
    from a shrimp survey off the southern Oregon coast. To Dr. David L. Stein, for many valued discussions

  • Zeros of Replicable Functions

    Creator:
    Toomey, Benjamin J.
    Abstract:
    Following the work of Asai, Kaneko, and Ninomiya for Faber polynomials associated to the modular group, and Bannai, Kojima, and Miezaki's partial proof for the case of the Fricke group of level 2, we show that the zeros of certain modular functions for some low-level genus zero groups associated to...
    Resource Type:
    Dissertation
    Full Text:
    r2mh |h ◦ π(K) = (mhkv,mhy)(hkv,mhy) mh2(mhy)2 = k(kv, y)(v, mk y) (mhy)2 = k (mhy)2 . 2.1.3

  • Zero Kinetic Energy Photoelectron Spectroscopy of Polycyclic Aromatic Hydrocarbons

    Creator:
    Harthcock, Colin
    Abstract:
    In this dissertation, I describe spectroscopic studies of jet-cooled polycyclic aromatic hydrocarbons (PAH) and one nitrogen substituted PAH (PANH) using pulsed field zero kinetic energy (ZEKE) photoelectron spectroscopy and resonantly enhanced multiphoton ionization (REMPI) spectroscopy. Recently, there has been a demand for far-infrared (FIR) spectral information of astrophysically relevant molecules...
    Resource Type:
    Dissertation
    Full Text:
    electric field is as follows42: ∆𝜈(𝑐𝑐−1) = 𝛼�𝑉𝑝 � 𝑉 𝑐𝑐 �+ 𝑉𝑠( 𝑉 𝑐𝑐 ) (1.1) where α

  • Zeatin O-xylosyltransferase in Phaseolus vulgaris : immunological and molecular analyses

    Creator:
    Martin, Ruth C.
    Abstract:
    Cytokinins are a group of plant hormones mediating cell division and differentiation. Zeatin is a naturally occurring and highly active cytokinin that is rapidly metabolized in Phaseolus seeds. The metabolites and enzymes mediating the conversion have been studied extensively. Zeatin metabolic enzymes may be utilized in studying the regulation of...
    Resource Type:
    Dissertation
    Full Text:
    . David and Machteld Mok for their support, guidance, constructive criticism, and last but certainly not

  • Youth-Caseworker Relationships and Academic Resilience of Youth in Foster Care

    Creator:
    Jaramillo, Jamie
    Abstract:
    Academic success is a salient domain of youth development and is related to positive lifelong outcomes among youth in foster care. However, youth in foster care experience compounding adversities, including maltreatment and foster care placement itself, which put them at risk of academic disengagement and underachievement. Despite these adversities, academic...
    Resource Type:
    Dissertation

  • Youth Wellbeing During the First School Year of the Covid-19 Pandemic: An Intersectional Analysis

    Creator:
    Fenske, Linda J.
    Abstract:
    During the first full school year of the Covid-19 pandemic, two central contexts for adolescent development—home and school—changed utterly. In Oregon, most middle- and high schoolers attended school entirely remotely from the beginning of the pandemic, in March, 2020, through the end of April, 2021, removing both the supports available...
    Resource Type:
    Dissertation
    Full Text:
    right in and gave feedback on this dissertation that altered its course for the better. David, you’ve