Index Catalog // ScholarsArchive@OSU

Magma chamber processes over the past 475,000 years at Mount Hood, Oregon : insights from crystal zoning and crystal size distribution studies

Creator:: Darr, Cristina M.
Abstract:: Several different petrological techniques have been applied to lava flows between 200 to 475,000 years old from Mount Hood, Oregon. Mount Hood is unusual, in comparison to nearby Mount St. Helens and Mount Jefferson, in that it has produced relatively homogeneous lava compositions over 475,000 years. Erupted lavas are mostly...
Resource Type:: Masters Thesis
Full Text:: ba p ba s hl cc ba N sg v ba R Te rt La va fl ow s an d do m es O f

Effect of the calpain inhibitor E-64-d on the degradation of α-fodrin in damaged muscle

Creator:: Boyd, Jeffrey
Abstract:: We hypothesized that calpain activity is elevated in response to muscle damage. To test this hypothesis, we examined the degradation of α-fodrin into its 150 and 145 kDa fragments following either 20 eccentric or isometric contractions. In addition, experiments were performed in the presence or absence of E-64-d, a calpain...
Resource Type:: Masters Thesis
Full Text:: presented on April 6, 2006. Title: Effect of the Calpain Inhibitor E-64-d on the Degradation of α-fodrin

Analysis and design of bandpass delta-sigma A/D converters

Creator:: Zhai, Dalun
Abstract:: A new approach to oversampled delta-sigma A/D converters ( AZ modulators ) is introduced, where a differential pseudo-Npath filter stage is used as a basic cell. In this band-pass application, the z to -zN transformation is employed to realize a RAM-type pseudo-2-path lossless integrator. The bandpass second-order and 4th-order delta-sigma...
Resource Type:: Masters Thesis
Full Text:: *general linear feedback encoder *delta modulator X —r-c;) am I Hp P' I A/D D/A (b) noise

Establishment and growth of natural and planted conifers ten years after overstory thinning and vegetation control in 50-year-old Douglas-fir stands

Creator:: Nabel, Mark R.
Abstract:: Forest managers of public lands in western Oregon and Washington have become increasingly interested in creating additional conifer cohorts in young, even-aged, second-growth Douglas-fir stands. The purpose of our research was to assess the establishment, survival, and growth of naturally-regenerated and underplanted conifers 10-13 years after overstory thinning and understory...
Resource Type:: Masters Thesis
Full Text:: R. Nabel for the degree of Master of Science in Forest Science presented on March 28, 2008

Factors associated with dusky Canada goose nesting and nest success on artificial nest islands of the western Copper River Delta

Creator:: Maggiulli, Nicole Marie
Abstract:: The population of dusky Canada geese (Branta canadensis occidentalis; hereafter, dusky geese) nesting on the western Copper River Delta (CRD) in south- central Alaska has been in decline since the late 1970s. In an effort to alleviate mammalian predation, increase nest success, and avoid a listing under the U.S. Endangered...
Resource Type:: Masters Thesis
Full Text:: D. Dugger The population of dusky Canada geese (Branta canadensis occidentalis; hereafter

3-D finite element modeling in OpenSees for bridge live-load girder distribution factors

Creator:: Scoggins, Luke A.
Abstract:: A generalized, three-dimensional, finite element bridge model was created in order to efficiently and accurately assess live-load girder distribution factors for a variety of bridge types. This model shortens the time required by bridge analysts to develop individual finite element models for bridges of varying geometries. The creation of the...
Resource Type:: Masters Thesis
Full Text:: 22, 2007. Title: 3-D Finite Element Modeling in OpenSees for Bridge Live-Load Girder Distribution

Growth and development of temperate and tropical passerines of the New World : a life history perspective

Creator:: Austin-Bythell, Suzanne H.
Abstract:: I studied developmental rates in a suite of temperate and tropical passerine bird species from the New World to test the hypothesis that tropical passerines exhibit slower patterns of growth and development than temperate birds. I also investigated how the expression of several developmental rates varied with life history traits...
Resource Type:: Masters Thesis
Full Text:: Tropical Passerines of the New World: A Life History Perspective Abstract approved: Tara R

Temporal and spatial variability of groundwater nitrate in the southern Willamette Valley of Oregon

Creator:: Mutti, Jeffrey Glenn
Abstract:: Groundwater nitrate contamination is a well-documented issue in the Southern Willamette Valley (SWV) of Oregon, as a Groundwater Management Area (GWMA) has recently been declared. As a GWMA, groundwater nitrate monitoring must occur until regional concentrations are below 7 mg/L NO3-N. However, the presence of temporal variability can make it...
Resource Type:: Masters Thesis
Full Text:: Oregon Abstract approved: Roy D. Haggerty Groundwater nitrate contamination is a well

Marine conservation in Latin America and the Caribbean : an analysis of marine protected areas (MPAs)

Creator:: Guarderas, A. Paulina
Abstract:: Coastal and marine ecosystems in Latin America and the Caribbean are undergoing a rapid and drastic transformation. Dense human populations are concentrated in coastal areas, leading to increased coastal development, destruction of near-shore habitats, pollution, and overexploitation of marine resources. For most Latin American and Caribbean countries, the deterioration of...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________ Jane Lubchenco Sally D. Hacker Coastal and marine ecosystems in Latin America and

Properties of marine stratus and stratocumulus derived using collocated MODIS and CALIPSO observations

Creator:: Hayes, Christopher R.
Abstract:: Adiabatic parcel models suggest specific relationships between cloud thickness and cloud properties. Such relationships govern cloud radiative forcing and thus cloud feedbacks in the climate system. Current remote sensing techniques work well at measuring these properties in low-level cloud systems that are overcast. Significant biases exist, however, when measuring cloud...
Resource Type:: Masters Thesis
Full Text:: OF Christopher R. Hayes for the degree of Master of Science in Atmospheric Sciences presented

ScholarsArchive@OSU

Magma chamber processes over the past 475,000 years at Mount Hood, Oregon : insights from crystal zoning and crystal size distribution studies

Effect of the calpain inhibitor E-64-d on the degradation of α-fodrin in damaged muscle

Analysis and design of bandpass delta-sigma A/D converters

Establishment and growth of natural and planted conifers ten years after overstory thinning and vegetation control in 50-year-old Douglas-fir stands

Factors associated with dusky Canada goose nesting and nest success on artificial nest islands of the western Copper River Delta

3-D finite element modeling in OpenSees for bridge live-load girder distribution factors

Growth and development of temperate and tropical passerines of the New World : a life history perspective

Temporal and spatial variability of groundwater nitrate in the southern Willamette Valley of Oregon

Marine conservation in Latin America and the Caribbean : an analysis of marine protected areas (MPAs)

Properties of marine stratus and stratocumulus derived using collocated MODIS and CALIPSO observations

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