Index Catalog // ScholarsArchive@OSU

An investigation on photoneutron production from medical linear accelerators

Creator:: Eller, Leanna R.
Abstract:: The photoneutron production from three Varian linear accelerators ranging in energies from 6 MV to 23 MV has been investigated. Photoneutrons are produced during (γ, n) interactions with materials located within the treatment head. These unwanted neutrons not only increase patient dose, but may also lead to the requirement of...
Resource Type:: Masters Thesis
Full Text:: ro ss S ec ti o n [ m b ] Photon Energy [MeV] 17 in order to achieve greater doses at

Electronic Properties of Passive Films on Carbon Steel Rebar in Simulated Concrete Pore Solutions

Creator:: Williamson, Jon W.
Abstract:: In the highly alkaline environment of concrete, carbon steel rebar is protected against corrosion by a passive oxide/oxyhydroxide film. Understanding the characteristics of this passive film, and how it depassivates, is the key for mitigating problems associated with steel corrosion in concrete. Although a large number of electrochemical and analytical...
Resource Type:: Masters Thesis
Full Text:: and decrease in the model parameters EF, ED2, ED1, ND1, EC, ND2, σ1, σ2, and EV ……………………………...191

Adaptive Streaming Methods using Dual Protocols and Reinforcement Learning

Creator:: Gatimu, Kevin
Abstract:: The ubiquity of high quality video and proliferation of mobile devices has contributed to an unprecedented rise in video consumption. HTTP, in conjunction with adaptive streaming, has become the de facto mechanism for delivering the vast majority of video as it readily caters to heterogeneous networks and devices. This dissertation...
Resource Type:: Dissertation
Full Text:: . corrupted frame (slices 2 and 4 are lost). Poor EC via frame copy results in error propagation five frames

Development of Cu-based Thin Films for Optoelectronic Applications

Creator:: Angelos, Gregory S.
Abstract:: CIGS and CdTe based commercial thin-ﬁlm solar cells (TFSCs) require an absorber thickness greater than 2 µm and 4 µm, respectively, to adequately absorb the solar spectrum. To efficiently extract photoexcited electrons, these TFSCs require relatively defect-free absorbers with high-minority carrier mobility (> 100 cm2V−1s−1) and long lifetime (> 10...
Resource Type:: Dissertation
Full Text:: energy band di- agram when EAabsorber > EAemitter (positive ∆EC a,e). b) A ‘cliff’ at the absorber

Determination of unsaturation-, growth phase-, and growth rate-dependent hydrogen isotopic fractionation in C₃₇ alkenones produced by Emiliania huxleyi

Creator:: Wolhowe, Matthew D.
Abstract:: Recent works have investigated use of the hydrogen isotopic composition of C₃₇ alkenones (δD[subscript K37s]), lipid biomarkers of certain haptophyte microalgae, as an independent paleosalinity proxy. I discuss herein the factors impeding such an application and identify the potential alternative use of δD[subscript K37s] measurements as a proxy for non-thermal,...
Resource Type:: Masters Thesis
Full Text:: ). 5 Ta bl e 1. S el ec te d R es ul ts fr om C ur re nt S tu di es o f α K 37

Semi-volatile fluorinated organic compounds in Asian and Pacific Northwestern U.S. air masses

Creator:: Piekarz, Arkadiusz M.
Abstract:: Current studies suggest that perfluorinated organic compounds, such as fluorotelomer alcohols (FtOHs) in the troposphere, may be precursors of perfluorocarboxylic acids and perfluorosulfonates in remote regions. Fluorinated organic compounds were investigated in archived extracts collected from remote locations in Okinawa, Japan (HSO) and Mount Bachelor, Oregon (MBO) during the springs...
Resource Type:: Masters Thesis
Full Text:: CHEMICAL, RETENTION TIMES (ON A 30 METER EC-WAX COLUMN), MOLECULAR WEIGHTS, AND IONS MONITORED FOR GC/MS

Excited state molecular structural evolution and chemical reactivity studied by femtosecond stimulated Raman spectroscopy

Creator:: Han, Fangyuan
Abstract:: In this dissertation, my research work on excited state dynamics of small organic molecules in solutions is presented. Using femtosecond stimulated Raman spectroscopy (FSRS) as the main experimental tool, the excited state hydrogen-bonding dynamics (ESHBD) of Coumarin 102, a common laser dye molecule, in ethanol solution is examined with <150...
Resource Type:: Dissertation
Full Text:: (blue/red solid), and the 1138/1136 cm-1 modes in H2O/D2O (blue/red dashed), respectively

Orbiting the Genus of False Units: Dynamics of Phage Genomes and Nematode Microbiomes Associated with Pseudomonas spp.

Creator:: Ha, Anh D.
Abstract:: Pseudomonas is a diverse, ubiquitous, and widely studied genus of bacteria. As Pseudomonas species occupy a wide range of niches in the ecosystem, they have made remarkable biological impacts. Better understanding of Pseudomonas biology, genetic diversity, and functional interactions with other organisms and the environment will provide valuable insights into...
Resource Type:: Dissertation

Journey to the Center of GW170817: Bayesian parameter estimation of outflows from binary neutron star mergers

Creator:: Rodriguez, Isabel J.
Abstract:: The discovery of GW170817 provided the first empirical evidence that merging binary neutron star systems are both progenitors of short gamma-ray bursts, as well as the primary sites of the nucleosynthetic rapid-neutron capture process. Initially detected as gravitational wave (GW) and gamma-ray burst (GRB) triggers, GW170817 was well-localized and follow-up...
Resource Type:: Masters Thesis
Full Text:: (Ec) = 47.90, θj = 1.66, θc = 4.25, log(Γ0) = 3.97, θobs = 24.41. This combination resulted in a log

Hydrogen isotopic composition of C₃₇ alkenones and the ecology and physiology of coccolithophores

Creator:: Wolhowe, Matthew D.
Abstract:: A three-part study was conducted into the impact of physiological and ecological variables on the net isotopic fractionation of hydrogen, α[subscript K₃₇], expressed in C₃₇ alkenones. First, alkenone-producer production, abundance, and export were characterized in the summertime Gulf of California and Eastern Tropical North Pacific using compound-specific, labeled in situ...
Resource Type:: Dissertation

ScholarsArchive@OSU

An investigation on photoneutron production from medical linear accelerators

Electronic Properties of Passive Films on Carbon Steel Rebar in Simulated Concrete Pore Solutions

Adaptive Streaming Methods using Dual Protocols and Reinforcement Learning

Development of Cu-based Thin Films for Optoelectronic Applications

Determination of unsaturation-, growth phase-, and growth rate-dependent hydrogen isotopic fractionation in C₃₇ alkenones produced by Emiliania huxleyi

Semi-volatile fluorinated organic compounds in Asian and Pacific Northwestern U.S. air masses

Excited state molecular structural evolution and chemical reactivity studied by femtosecond stimulated Raman spectroscopy

Orbiting the Genus of False Units: Dynamics of Phage Genomes and Nematode Microbiomes Associated with Pseudomonas spp.

Journey to the Center of GW170817: Bayesian parameter estimation of outflows from binary neutron star mergers

Hydrogen isotopic composition of C₃₇ alkenones and the ecology and physiology of coccolithophores

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