Index Catalog // ScholarsArchive@OSU

Application of Coupled Oscillator Model to Terahertz and Optical Control of Plasmon Induced Opacity in Coupled Metamaterials

Creator:: Sprague, Milo X.
Abstract:: Terahertz (THz) frequencies of the electromagnetic spectrum have been underutilized when compared to neighboring microwave and infrared frequencies, largely due to the difficulties controlling and detecting these fields. In a step toward gaining control over THz frequencies, my advisor Dr. Yun-Shik Lee’s group experimentally demonstrated optical-pulse THz-control over a plasmonic...
Resource Type:: Undergraduate Thesis
Full Text:: metamaterial obtained in the lab of Dr. Yun-Shik Lee at Oregon State University. The metamaterial sample used

Greater sage-grouse vital rates after wildfire

Creator:: Foster, Lee J., Dugger, Katie M., Hagen, Christian A., and Budeau, David A.
Abstract:: Greater sage-grouse (Centrocercus urophasianus) have been subject to long-term and continuing declines in population and habitat since European settlement of western North America. Increased wildfire activity constitutes a primary threat to the species in western portions of their range, with documented declines in wildfire-affected populations. Following a 187,000-ha wildfire in...
Resource Type:: Article
Full Text:: Article Greater Sage-Grouse Vital Rates After Wildfire LEE J. FOSTER,1,2 Oregon Cooperative Fish and

Effects of Facial Tattoos on Perceptions of Facial Trustworthiness

Creator:: Landrus, Bryn E.
Abstract:: Background: Individuals rapidly infer character traits and behaviors through the process of facial perception. Perceptions of trustworthiness, accurate or not, completed by authorities in the criminal justice system may have implications for individuals suspected of crimes, including harsher or longer sentencing decisions. Objective: The present study concerned how the presence...
Resource Type:: Honors College Thesis
Full Text:: . Abstract approved:_____________________________________________________ David Kerr Background

Machine Learning and Optimization Applications in Agriculture

Creator:: Molotkov, Alexander
Abstract:: The ever-increasing global population presents looming problems for the field of agriculture. Global food demand will, at some point, increase to the point where there is not enough crop-ready land to keep up. This creates an additional incentive, other than economics, for growers to increase their yield-per-acre and make sure...
Resource Type:: Honors College Thesis
Full Text:: Manufacturing Engineering Stefan Lee, Committee Member, representing Electrical and Computer Engineering Brian

An Analysis of Driver's Visual Attention When Exposed to Roadside Drone Operations

Creator:: Sova, Alden
Abstract:: Drones are being used increasingly in the transportation sector for roadside applications such as surveying, structural inspection, and traffic monitoring, which raises distraction concerns for drivers. This study examines the visual attention of a group of Oregon drivers to determine drones’ potential as distracting roadside elements. Eye tracking data was...
Resource Type:: Honors College Thesis
Full Text:: approved:_____________________________________________________ David Hurwitz Drones are being

Pillaging Bloodwood: An Exploratory Examination of Illegal Deforestation in Guinea-Bissau Through Forest Disturbance Algorithms and Unsupervised Clustering Techniques

Creator:: Walters, Alexander E.
Abstract:: Environmental crime around the world, such as trafficking in illegal timber, is directly related to political instability. Traffickers exploit weak, fragile, and chaotic political circumstances to illegally extract high-value commodities, challenging the extent to which conservation goals are achievable in resource rich developing countries. Rosewood is the largest traded endangered...
Resource Type:: Masters Thesis
Full Text:: : ___________________________________________________________ David J. Wrathall Environmental crime around the world, such as trafficking in

Comparison of the Accuracy and Applicability of Forebody Wake Effect Models for Parachute System Design

Creator:: Kemling, Gabriel H. and Blunck, David L.
Abstract:: The forebody wake effect (FWE) is important to consider when designing parachute systems because it can affect parachute performance. Parachutes work by altering the aerodynamic properties of an attached forebody to control a descent. The FWE can reduce parachute drag, causing the system to descend faster than desired. This drag...
Resource Type:: Research Paper
Full Text:: Gabriel H. Kemling1 and David L. Blunck2 Oregon State University, Corvallis, Oregon, 97330, United States

Sound and Vibration Analysis of Alternative Rumble Strips

Creator:: Horne, Dylan Ross
Abstract:: Roadway departure crashes accounted for 18,275 fatal crashes in 2017 across the United States (Jones et al. 2017). Rumble strips (RS) provide audible and haptic interior alert when a vehicle is departing the roadway reducing run-off-the road crashes. Although inexpensive to install, and easy to maintain, RS are not installed...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ David S. Hurwitz Roadway departure crashes accounted for 18,275 fatal crashes in 2017

Temperature Evolution of Nonreacting Spark Kernels at Sub-Atmospheric Pressures

Creator:: Caplan, Daniel L.
Abstract:: In the event of a mid-flight flameout of a gas turbine engine, reignition is paramount to occupant safety. Ignition at high altitude can be challenging, due in part to the potentially lower ambient pressures. An understanding of the effects of sub-atmospheric pressures on the temperature evolution of spark kernels is...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________ David L. Blunck In the event of a mid-flight flameout of a gas turbine engine

Potential Therapeutic Competition in Community-Living Older Adults in the U.S.: Use of Medications That May Adversely Affect a Coexisting Condition

Creator:: Lorgunpai, Songprod Jonathan, Grammas, Marianthe, Lee, David S. H., McAvay, Gail, Charpentier, Peter, and Tinetti, Mary E.
Abstract:: OBJECTIVE: The 75% of older adults with multiple chronic conditions are at risk of therapeutic competition (i.e. treatment for one condition may adversely affect a coexisting condition). The objective was to determine the prevalence of potential therapeutic competition in community-living older adults. METHODS: Cross-sectional descriptive study of a representative sample...
Resource Type:: Article
Full Text:: Affect a Coexisting Condition Lorgunpai SJ, Grammas M, Lee DSH, McAvay G, Charpentier P, et al. (2014

Trade-offs in ecosystem impacts from nanomaterial versus organic chemical ultraviolet filters in sunscreens

Creator:: Hanigan, David, Truong, Lisa, Schoepf, Jared, Nosaka, Takayuki, Mulchandani, Anjali, Tanguay, Robert L., and Westerhoff, Paul
Abstract:: Both nanoparticulate (nZnO and nTiO(2)) and organic chemical ultraviolet (UV) filters are active ingredients in sunscreen and protect against skin cancer, but limited research exists on the environmental effects of sunscreen release into aquatic systems. To examine the trade-offs of incorporating nano particles (NPs) into sunscreens over the past two...
Resource Type:: Article
Full Text:: ultraviolet filters in sunscreens David Hanigan a, *, Lisa Truong c, Jared Schoepf d, Takayuki Nosaka d

Early adulthood: A developmental perspective on suicide prevention and intervention

Creator:: Kerr, David C. R.
Abstract:: Early adulthood is a time of transition when large segments of the population embrace new roles and show decreases in behaviors and problems thought to underlie suicide risk. Still, other segments show emergent or worsening psychopathology per-haps exacerbated by age-related disconnection from prior relational and institutional supports. Suicide prevention efforts...
Resource Type:: Article
Full Text:: Suicide Prevention and Intervention David C. R. Kerr, Ph.D. Associate Professor

Tracking the Strength of the Walker Circulation With Stable Isotopes in Water Vapor

Creator:: Dee, Sylvia G., Nusbaumer, Jesse, Bailey, Adriana, Russell, James M., Lee, Jung-Eun, Konecky, Bronwen, Buenning, Nikolaus H., and Noone, David C.
Abstract:: General circulation models (GCMs) predict that the global hydrological cycle will change in response to anthropogenic warming. However, these predictions remain uncertain, in particular, for precipitation (Intergovernmental Panel on Climate Change, 2013, https://doi .org/10.1017/CB09781107415324.004). Held and Soden (2006, https://doi.org/10.1175/JCLI3990.1) suggest that as lower tropospheric water vapor concentration increases in a...
Resource Type:: Article
Full Text:: David C. Noone9 1Department of Earth, Environmental, and Planetary Sciences, Brown University

Anti-Hypertensive Medications and Cardiovascular Events in Older Adults with Multiple Chronic Conditions

Creator:: Tinetti, Mary E., Han, Ling, McAvay, Gail J., Lee, David S. H., Peduzzi, Peter, Dodson, John A., Gross, Cary P., Zhou, Bingqing, and Lin, Haiqun
Abstract:: Importance Randomized trials of anti-hypertensive treatment demonstrating reduced risk of cardiovascular events in older adults included participants with less comorbidity than clinical populations. Whether these results generalize to all older adults, most of whom have multiple chronic conditions, is uncertain. Objective To determine the association between anti-hypertensive medications and CV...
Resource Type:: Article
Full Text:: in Older Adults with Multiple Chronic Conditions Tinetti ME, Han L, McAvay GJ, Lee DSH, Peduzzi P

Practical Mechanically Interlocked Molecules: A Model of Gas Adsorption in Metal OrganicFrameworks Harboring Rotaxane Molecular Shuttles

Creator:: Carney, Jonathan
Abstract:: Metal organic frameworks(MOFs) are a class of crystalline materials utilized in gas storage, chemicalsensing, and other engineering applications. Recently chemists have begun synthesizing MOFs withmoving parts in order to further these applications. A wide array of dynamic MOFs have been created andtheorized. Among them is the interlocking of a ring...
Resource Type:: Undergraduate Thesis
Full Text:: undergraduate thesis advised by David Roundy and Cory Simon submitted to the Department of Physics, Oregon

Functional consequences of microRNA regulation by polycyclic aromatic hydrocarbons in 3D human bronchial epithelial cells

Creator:: Mans, Michael-Andres D.
Abstract:: Polycyclic aromatic hydrocarbons (PAHs) are a class of contaminants ubiquitous in the environment and result from the incomplete combustion of fossil fuels. Many PAHs have been identified as procarcinogenic, and are metabolized to form DNA adducts; however, other mechanisms also may contribute to toxicity and help explain differences in toxicity...
Resource Type:: Undergraduate Thesis
Full Text:: _____________________________________________________ _______________ David Williams, Environmental and Molecular Toxicology

Quantifying Bulk Electrode Strain and Material Displacement within Lithium Batteries via High-Speed Operando Tomography and Digital Volume Correlation

Creator:: Finegan, Donal P., Tudisco, Erika, Scheel, Mario, Robinson, James B., Taiwo, Oluwadamilola O., Eastwood, David S., Lee, Peter D., Di Michiel, Marco, Bay, Brian, Hall, Stephen A., Hinds, Gareth, Brett, Dan J. L., and Shearing, Paul R.
Abstract:: Tracking the dynamic morphology of active materials during operation of lithium batteries is essential for identifying causes of performance loss. Digital volume correlation (DVC) is applied to high-speed operando synchrotron X-ray computed tomography of a commercial Li/MnO₂ primary battery during discharge. Real-time electrode material displacement is captured in 3D allowing...
Resource Type:: Article
Full Text:: , Oluwadamilola O. Taiwo , David S. Eastwood , Peter D. Lee , Marco

Discrete-Event Simulation of Ground-Based Timber Harvesting Operations

Creator:: She, Ji, Chung, Woodam, and Kim, David
Abstract:: Operational studies are necessary to support production and management decisions of forest industries. A time study (TS) approach is widely used in timber harvesting operations to understand the performance of individual harvesting machines as well as the entire system. However, several limitations of the TS approach include the use of...
Resource Type:: Article
Full Text:: She 1, Woodam Chung 1,* and David Kim 2 1 Department of Forest Engineering, Resources and Management

Fire and Grazing Influence Site Resistance to Bromus tectorum Through Their Effects on Shrub, Bunchgrass and Biocrust Communities in the Great Basin (USA)

Creator:: Condon, Lea A. and Pyke, David A.
Abstract:: Shrubs, bunchgrasses and biological soil crusts (biocrusts) are believed to contribute to site resistance to plant invasions in the presence of cattle grazing. Although fire is a concomitant disturbance with grazing, little is known regarding their combined impacts on invasion resistance. We are the first to date to test the...
Resource Type:: Article
Full Text:: on Shrub, Bunchgrass and Biocrust Communities in the Great Basin (USA) Lea A. Condon1,2* and David

Estimating the Counterfactual Impact of Conservation Programs on Land Cover Outcomes: The Role of Matching and Panel Regression Techniques

Creator:: Jones, Kelly W. and Lewis, David J.
Abstract:: Deforestation and conversion of native habitats continues to be the leading driver of biodiversity and ecosystem service loss. A number of conservation policies and programs are implemented—from protected areas to payments for ecosystem services (PES)—to deter these losses. Currently, empirical evidence on whether these approaches stop or slow land cover...
Resource Type:: Article
Full Text:: Techniques Kelly W. Jones1*, David J. Lewis2 1 Department of Human Dimensions of Natural Resources, Colorado

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