Index Catalog // ScholarsArchive@OSU

Eliminating flutter for clamped von Karman plates immersed in subsonic flows

Creator:: Lasiecka, Irena and Webster, Justin
Abstract:: We address the long-time behavior of a non-rotational von Karman plate in an inviscid potential flow. The model arises in aeroelasticity and models the interaction between a thin, nonlinear panel and a flow of gas in which it is immersed [6, 21, 23]. Recent results in [16, 18] show that...
Resource Type:: Article
Full Text:: flows. Communications on Pure and Applied Analysis, 13(5), 1935-1969. doi:10.3934/cpaa.2014.13.1935

Commensurable continued fractions

Creator:: Arnoux, Pierre and Schmidt, Thomas A.
Abstract:: We compare two families of continued fractions algorithms, the symmetrized Rosen algorithm and the Veech algorithm. Each of these algorithms expands real numbers in terms of certain algebraic integers. We give explicit models of the natural extension of the maps associated with these algorithms; prove that these natural extensions are...
Resource Type:: Article
Full Text:: Continuous Dynamical Systems, 34(11), 4389-4418. doi:10.3934/dcds.2014.34.4389 10.3934/dcds.2014.34.4389

Linearized model for wind turbines in yaw

Creator:: Chaiyapinunt, Somsak
Abstract:: The analysis of rigid hub, three-bladed horizontal-axis, axisymmetric wind turbines in yaw is made using a linearized, four-degree-of-freedom model. The linearized equations of motion of rotor and nacelle are developed using quasi-steady blade element theory and Lagrange's equations. The yaw behavior of the system is studied from coefficients of the...
Resource Type:: Dissertation

Agricultural policy and productivity: evidence from Brazilian censuses

Creator:: Rada, Nicholas E. and Buccola, Steven T.
Abstract:: Brazil's economic strategy has shifted hesitatingly during the last several decades from one of producer protection to trade competitiveness. Exploiting the variations these shifts have afforded, we use a sequence of decennial agricultural censuses to examine Brazilian policy implications for agricultural competitiveness and efficiency. Total factor productivity is decomposed into...
Resource Type:: Article
Full Text:: Rondônia CPAF-RR Embrapa Roraima Roraima CPAF-AP Embrapa Amapá Amapá CPAA Embrapa western Amazon

Flow-plate interactions: Well-posedness and long-time behavior

Creator:: Chueshov, Igor, Lasiecka, Irena, and Webster, Justin
Abstract:: We consider flow-structure interactions modeled by a modified wave equation coupled at an interface with equations of nonlinear elasticity. Both subsonic and supersonic flow velocities are treated with Neumann type flow conditions, and a novel treatment of the so called Kutta-Joukowsky flow conditions are given in the subsonic case. The...
Resource Type:: Article
Full Text:: Continuous Dynamical Systems - Series S, 7(5), 925-965. doi:10.3934/dcdss.2014.7.925 10.3934/dcdss

The fundamental solution of linearized nonstationary navier-stokes equations of motion around a rotating and translating body.

Creator:: Farwig, Reinhard, Guenther, Ronald B., Thomann, Enrique A., and Necasova, Sarka
Abstract:: We derive the fundamental solution of the linearized problem of the motion of a viscous uid around a rotating body when the axis of rotation of the body is not parallel to the velocity of the uid at infinity.
Resource Type:: Article
Full Text:: DISCRETE AND CONTINUOUS doi:10.3934/dcds.2014.34.511

Infinitely Many Lattice Surfaces with Special Pseudo-Anosov Maps

Creator:: Calta, Kariane and Schmidt, Thomas A.
Abstract:: We give explicit pseudo-Anosov homeomorphisms with vanishing Sah–Arnoux–Fathi invariant. Any translation surface whose Veech group is commensurable to any of a large class of triangle groups is shown to have an affine pseudo-Anosov homeomorphism of this type. We also apply a reduction to finite triangle groups and thereby show the...
Resource Type:: Article
Full Text:: JOURNAL OF MODERN DYNAMICS doi: 10.3934/jmd.2013.7.239

Multidisciplinary Approach to Evaluate the Effect of Plant Growth Promoting Rhizobacteria (PGPR) on Soil Microbiota and Quality of Strawberries

Creator:: Nam, Jun Haeng
Abstract:: Oregon strawberries are known for their high quality, intense flavor, sweetness, and rich red color. With optimal weather conditions, including rainy and mild seasons, Oregon has one of the best strawberry farming environments. Amongst the factors for a suitable strawberry farming environment, soil significantly influences strawberry growth and quality. The...
Resource Type:: Masters Thesis

Ecohydrologic Connections in Semiarid Rangeland Ecosystems in Oregon

Creator:: Durfee, Nicole M.
Abstract:: An improved understanding of the ecohydrologic relationships in semiarid rangelands is imperative for the development of effective rehabilitation and land management practices. This thesis addresses the ecohydrologic relationships of two significant issues concerning semiarid rangeland ecosystems: western juniper encroachment and increasing stream temperatures. This thesis is divided into two chapters;...
Resource Type:: Masters Thesis

Optimizing HIV Treatment in Resource-Limited Settings

Creator:: Akudibillah, Gordon Amed
Abstract:: Apart from the traditional role of preventing progression from HIV to AIDS, antiretroviral drug therapy (ART) has an additional benefit of substantially reducing infectiousness, making them potentially an important strategy in the fight against HIV. Recent advances in drug therapy have also seen the use of antiretroviral drugs as a...
Resource Type:: Dissertation

ScholarsArchive@OSU

Eliminating flutter for clamped von Karman plates immersed in subsonic flows

Commensurable continued fractions

Linearized model for wind turbines in yaw

Agricultural policy and productivity: evidence from Brazilian censuses

Flow-plate interactions: Well-posedness and long-time behavior

The fundamental solution of linearized nonstationary navier-stokes equations of motion around a rotating and translating body.

Infinitely Many Lattice Surfaces with Special Pseudo-Anosov Maps

Multidisciplinary Approach to Evaluate the Effect of Plant Growth Promoting Rhizobacteria (PGPR) on Soil Microbiota and Quality of Strawberries

Ecohydrologic Connections in Semiarid Rangeland Ecosystems in Oregon

Optimizing HIV Treatment in Resource-Limited Settings

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