Index Catalog // ScholarsArchive@OSU

First passage time of skew Brownian motion

Creator:: Appuhamillage, Thilanka and Sheldon, Daniel
Abstract:: Nearly fifty years after the introduction of skew Brownian motion by Itô and McKean (1963), the first passage time distribution remains unknown. In this paper, we first generalize results of Pitman and Yor (2001) and Csáki and Hu (2004) to derive formulae for the distribution of ranked excursion heights of...
Resource Type:: Article
Full Text:: Applied Probability Trust (21 March 2012) FIRST PASSAGE

Finite difference time domain modeling of subwavelength-structured anti-reflective coatings

Creator:: Han, Katherine, Han, Hai-Yue, Stack, James, Jr., and Chang, Chih-Hung
Abstract:: The finite difference time domain (FDTD) method was used to model anti-reflective properties of a variety of sub-wavelength structures for 300 to 1300 nm input light. Light hitting non-tapered nanostructures exhibited interference patterns similar to thin film anti-reflective coatings (ARCs), increasing the anti-reflective effect at several wavelengths. The lowest reflectance...
Resource Type:: Article
Full Text:: Difference Time Domain Modeling of Sub-Wavelength Structured Anti-Reflective Coatings. Applied

Finite-difference time-domain modeling of ultra-high frequency antennas on and inside the carbon fiber body of a solar-powered electric vehicle

Creator:: Han, Katherine, Freeman, Paul, Han, Hai-Yue, Hamar, Jacob, and Stack, James F., Jr.
Abstract:: Finite-difference time-domain simulations are performed on a 900 MHz band antenna inside and outside the carbon fiber body of a solar-powered electric vehicle. Data are analyzed to determine the optimal antenna placement for transmission to a receiving antenna located toward the rear of the solar vehicle. Modeling data are compared...
Resource Type:: Article
Full Text:: body of a solar-powered electric vehicle. Applied Computational Electromagnetics Society Journal, 29(6

Electroluminescence thermal quenching in SrS:Cu thin-film electroluminescent devices

Creator:: Baukol, B. A., Hitt, J. C., Keir, P. D., and Wager, J. F.
Abstract:: Electroluminesence (EL) thermal quenching refers a reduction in luminance, concomitant with a reduction in transferred charge, when an alternating-current thin-film electroluminescent (ACTFEL) device is operated at an elevated temperature. EL thermal quenching is found to be significant in SrS:Cu ACTFEL devices operated above ~60-80 °C. Maximum transferred charge-maximum applied voltage...
Resource Type:: Article
Full Text:: Using APL format APPLIED PHYSICS LETTERS VOLUME 76, NUMBER 2 10

Thermal diffusivity of seasonal snow determined from temperature profiles

Creator:: Oldroyd, H. J., Higgins, C. W., Huwald, H., Selker, J. S., and Parlange, M. B.
Abstract:: Thermal diffusivity of snow is an important thermodynamic property associated with key hydrological phenomena such as snow melt and heat and water vapor exchange with the atmosphere. Direct determination of snow thermal diffusivity requires coupled point measurements of thermal conductivity and density, which are nonstationary due to snow metamorphism. Traditional...
Resource Type:: Article
Full Text:: Thermal diffusivity of seasonal snow determined from

Thermal conductivity of nano-grained SrTiO3 thin films

Creator:: Foley, Brian M., Brown-Shaklee, Harlan J., Duda, John C., Cheaito, Ramez, Gibbons, Brady J., Medlin, Doug, Ihlefeld, Jon F., and Hopkins, Patrick E.
Abstract:: We measure the thermal conductivities of nano-grained strontium titanate (ng-SrTiO₃) films deposited on sapphire substrates via time-domain thermoreflectance. The 170 nm thick oxide films of varying grain-size were prepared from a chemical solution deposition process. We find that the thermal conductivity of ng-SrTiO₃ decreases with decreasing average grain size and attribute...
Resource Type:: Article
Full Text:: Thermal conductivity of nano-grained SrTiO3 thin films Brian M

High-Flux Thermal Management With Supercritical Fluids

Creator:: Fronk, Brian M. and Rattner, Alexander S.
Abstract:: A novel thermal management approach is explored, which uses supercritical carbon dioxide (sCO2) as a working fluid to manage extreme heat fluxes in electronics cooling applications. In the pseudocritical region, sCO2 has extremely high volumetric thermal capacity, which can enable operation with low pumping requirements, and without the potential for...
Resource Type:: Article
Full Text:: additional thermal transport research and engineering are needed before practical systems can be realized

Silica sol‐gel encapsulation of cyanobacteria: lessons for academic and applied research

Creator:: Dickson, David J. and Ely, Roger L.
Abstract:: Cyanobacteria inhabit nearly every ecosystem on earth, play a vital role in nutrient cycling, and are useful as model organisms for fundamental research in photosynthesis and carbon and nitrogen fixation. In addition, they are important for several established biotechnologies for producing food additives, nutritional and pharmaceutical compounds, and pigments, as...
Resource Type:: Article
Full Text:: Silica sol‐gel encapsulation of cyanobacteria: lessons for academic and applied research 1 2 David J

Defect mechanisms in high resistivity BaTiO₃–Bi(Zn₁/₂Ti₁/₂)O₃ ceramics

Creator:: Raengthon, Natthaphon, DeRose, Victoria J., Brennecka, Geoffrey L., and Cann, David P.
Abstract:: The defect mechanisms that underpin the high energy density dielectric 0.8BaTiO₃–0.2Bi(Zn₁/₂Ti₁/₂) O₃ were investigated. Characterization of the nominally stoichiometric composition revealed the presence of a Ti³⁺-related defect center, which is correlated with lower resistivities and an electrically heterogeneous microstructure. In compositions with 2 mol. % Ba-deficiency, a barium vacancy-oxygen vacancy...
Resource Type:: Article

Comparison of Deionized Water and FC‐72 in Pool and Jet Impingement Boiling Thermal Management

Creator:: Cardenas, Ruander and Narayanan, Vinod
Abstract:: High heat fluxes and stringent constraints on surface temperature and its uniformity during thermal management of electrical and electronic components often necessitate use of boiling heat transfer. This study compares the pool and jet impingement boiling heat transfer characteristics of deionized water and FC‐72 at an equivalent fluid saturation temperature...
Resource Type:: Article
Full Text:: Comparison of Deionized Water and FC‐72 in Pool and Jet Impingement Boiling Thermal Management Ruander

ScholarsArchive@OSU

First passage time of skew Brownian motion

Finite difference time domain modeling of subwavelength-structured anti-reflective coatings

Finite-difference time-domain modeling of ultra-high frequency antennas on and inside the carbon fiber body of a solar-powered electric vehicle

Electroluminescence thermal quenching in SrS:Cu thin-film electroluminescent devices

Thermal diffusivity of seasonal snow determined from temperature profiles

Thermal conductivity of nano-grained SrTiO3 thin films

High-Flux Thermal Management With Supercritical Fluids

Silica sol‐gel encapsulation of cyanobacteria: lessons for academic and applied research

Defect mechanisms in high resistivity BaTiO₃–Bi(Zn₁/₂Ti₁/₂)O₃ ceramics

Comparison of Deionized Water and FC‐72 in Pool and Jet Impingement Boiling Thermal Management

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