Index Catalog // ScholarsArchive@OSU

Independent effects of habitat loss and fragmentation on pollination : tropical forest fragmentation alters hummingbird movements and pollination dynamics

Creator:: Hadley, Adam S.
Abstract:: A growing body of work reveals that animal-mediated pollination is negatively affected by anthropogenic disturbance. Landscape-scale disturbance results in two often inter-related processes: (1) habitat loss, and (2) disruptions of habitat configuration (i.e. fragmentation). Understanding the relative effects of such processes is critical in designing effective management strategies to limit...
Resource Type:: Dissertation
Full Text:: discussions and advice throughout: Todd Bertwelt, Julia Buck, Emily Comfort, Tana Ellis, Sarah Hadley, Kate

Sarah Wright Poster 2012.pdf

Creator:: Wright, Sarah K.
Abstract:: The Willamette Valley, west of the Cascade mountain range in the state of Oregon, is home to a growing number of vineyards. This rather recent, booming industry of the region has become an important component of the economy of the state’s agriculture since the late 1960’s, contributing more than $1.56...
Full Text:: and Effects on Pinot Noir Fruit in Oregon Sarah K. Wright1,, Laurent Deluc, PhD2, Robert R. Martin

Modelling Gravitationally Coupled Modes of High Stellar Mass Protostellar Star-Disk Systems

Creator:: Ahmed, Aneeq
Abstract:: We computationally modeled protostellar star-disk systems with star to disk mass ratio of 10. Our computational models looked at the development of density perturbations in these systems for different geometries of the system. The ratio of the star’s height and radius (rₚ/rₑ) is varied between 0.1746 and 0.88095. We modeled...
Resource Type:: Undergraduate Thesis
Full Text:: Stellar Mass Protostellar Star-Disk Systems Aneeq Ahmed Advisor: Dr. Kathryn Hadley

Corrugation Instabilities Across Shock Fronts in Magnetohydrodynamical Astrophysical Systems

Creator:: Mullins, Austin Charles
Abstract:: Slow magnetosonic shock fronts are unstable to changes made to their shape, a phenomenon known as corrugation instability. The computational models studied considers a system where plasma travels across a shock front. Using the code Linogen, the corrugation instability of a shock front can be theoretically modeled. The results show...
Resource Type:: Honors College Thesis
Full Text:: :_____________________________________________________ Kathryn Hadley Slow magnetosonic shock fronts are unstable to changes made to their

Life in (an)other world : issues of otherness and magic in Sir Gawain and the Green Knight and J.K. Rowling's Harry Potter series

Creator:: Fennell, Dalicia K.
Abstract:: My thesis is comprised of two articles, titled "Journeying Through (An)Other World: Examining the Role of Magic and Transformational Otherness in Sir Gawain and the Green Knight" and "Magic, Muggles, and Mudbloods: Examining Magical Otherness in J.K. Rowling's Harry Potter Series." The introduction frames the thematic, theoretical, and critical connections...
Resource Type:: Masters Thesis
Full Text:: Spell: The Meaning behind the Mania for J. K. Rowling's Bestselling Books. 3rd ed. Carol Stream, IL

How sweet is the land? Modeling caloric landscapes for tropical hummingbirds

Creator:: Birkett, Christina Nozomi and Birkett, Nozomi Fukui
Abstract:: Pollination is a critical ecosystem function for sustaining biodiversity. However, pollinators and the services they provide are threatened by landscape-altering anthropogenic activities across the globe. Habitat loss and fragmentation, introduction of invasive species, chemical use, and urbanization have been shown to impact pollination. Pollinator foraging behavior is thought to be...
Resource Type:: Undergraduate Thesis
Full Text:: landscapes for tropical hummingbirds Abstract Approved: Adam S. Hadley

Beating Modes in Protostellar Disks

Creator:: Varga, Attila V.
Abstract:: Computational simulations of disks are becoming an important tool to predict the the evolution of protostars and disks to better understand the formation of planets. Past research has shown that the evolution of disks and their protostar can be altered through the interaction between gravity and hydrodynamic instabilities. We perform...
Resource Type:: Undergraduate Thesis
Full Text:: for the degree of Bachelor of Science in Physics Advisor Dr. Kathryn Hadley June 6, 2018

Acoustic classification of multiple simultaneous bird species: A multi-instance multi-label approach

Creator:: Briggs, Forrest, Lakshminarayanan, Balaji, Neal, Lawrence, Fern, Xiaoli Z., Raich, Raviv, Hadley, Sarah J. K., Hadley, Adam S., and Betts, Matthew G.
Abstract:: Although field-collected recordings typically contain multiple simultaneously vocalizing birds of different species, acoustic species classification in this setting has received little study so far. This work formulates the problem of classifying the set of species present in an audio recording using the multi-instance multi-label (MIML) framework for machine learning, and...
Resource Type:: Article
Full Text:: University, Corvallis, Oregon 97331 Sarah J. K. Hadley, Adam S. Hadley, and Matthew G. Betts Department of

Searching for Pulsars for Use in Gravitational Wave Detection

Creator:: Connolly, Genevieve J.
Abstract:: Gravitational waves (GWs) are disturbances in spacetime that can be caused by events such as black hole mergers and supernovae, as well as continuous sources such as binary star systems. GWs offer a new avenue of astrophysical research and can reveal information about the early universe. GW detection can be...
Resource Type:: Honors College Thesis
Full Text:: Hadley, Committee Member, representing Department of Physics Davide Lazzati, Committee Member

Tropical forest fragmentation limits pollination of a keystone understory herb

Creator:: Hadley, Adam S., Frey, Sarah J. K., Robinson, W. Douglas, Kress, W. John, and Betts, Matthew G.
Abstract:: Loss of native vegetation cover is thought to be a major driver of declines in pollination success worldwide. However, it is not well known whether reducing the fragmentation of remaining vegetation can ameliorate these negative effects. We tested the independent effects of composition vs. configuration on the reproductive success of...
Resource Type:: Article
Full Text:: understory herb Hadley, A. S., Frey, S. J. K., Robinson, W. D., Kress, W. J., & Betts, M. G. (2014

ScholarsArchive@OSU

Independent effects of habitat loss and fragmentation on pollination : tropical forest fragmentation alters hummingbird movements and pollination dynamics

Sarah Wright Poster 2012.pdf

Modelling Gravitationally Coupled Modes of High Stellar Mass Protostellar Star-Disk Systems

Corrugation Instabilities Across Shock Fronts in Magnetohydrodynamical Astrophysical Systems

Life in (an)other world : issues of otherness and magic in Sir Gawain and the Green Knight and J.K. Rowling's Harry Potter series

How sweet is the land? Modeling caloric landscapes for tropical hummingbirds

Beating Modes in Protostellar Disks

Acoustic classification of multiple simultaneous bird species: A multi-instance multi-label approach

Searching for Pulsars for Use in Gravitational Wave Detection

Tropical forest fragmentation limits pollination of a keystone understory herb

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