Index Catalog // ScholarsArchive@OSU

Non-Invasive Sampling of Schistosomes from Humans Requires Correcting for Family Structure

Creator:: Steinauer, Michelle L., Christie, Mark R., Blouin, Michael S., Agola, Lelo E., Mwangi, Ibrahim N., Maina, Geoffrey M., Mutuku, Martin W., Kinuthia, Joseph M., Mkoji, Gerald M., and Loker, Eric S.
Abstract:: For ethical and logistical reasons, population-genetic studies of parasites often rely on the non-invasive sampling of offspring shed from their definitive hosts. However, if the sampled offspring are naturally derived from a small number of parents, then the strong family structure can result in biased population-level estimates of genetic parameters,...
Resource Type:: Article
Full Text:: . Blouin2, Lelo E. Agola3, Ibrahim N. Mwangi3, Geoffrey M. Maina3, Martin W. Mutuku3, Joseph M. Kinuthia3

Sampling-based robotic information gathering algorithms

Creator:: Hollinger, Geoffrey A. and Sukhatme, Gaurav S.
Abstract:: We propose three sampling-based motion planning algorithms for generating informative mobile robot trajectories. The goal is to find a trajectory that maximizes an information quality metric (e.g. variance reduction, information gain, or mutual information) and also falls within a pre-specified budget constraint (e.g. fuel, energy, or time). Prior algorithms have...
Resource Type:: Article
Full Text:: Information Gathering Algorithms Geoffrey A. Hollinger∗ and Gaurav S. Sukhatme† August 12, 2014 Abstract

Association of Juvenile Salmon and Estuarine Fish with Intertidal Seagrass and Oyster Aquaculture Habitats in a Northeast Pacific Estuary

Creator:: Dumbauld, Brett R., Hosack, Geoffrey R., and Bosley, Katelyn M.
Abstract:: Structured estuarine habitats, such as salt marshes, seagrass beds, and oyster reefs, are recognized as critical nurseries for juvenile fish and crustaceans. Estuarine habitat usage by fish, including juvenile Pacific salmon Oncorhynchus spp., was characterized by sampling with a modified tow net in Willapa Bay, Washington, where 20% of the...
Resource Type:: Article

Estuarine Dissolved Oxygen History Inferred from Sedimentary Trace Metal and Organic Matter Preservation

Creator:: Johnson, Geoffrey M., Sutherland, David A., Roering, Josh J., Mathabane, Nathan, and Gavin, Daniel G.
Abstract:: Environmental history recorded in estuarine sediment describes water quality regimes through the use of geochemical and biological proxies. We collected sediment cores from two locations in the Coos Estuary, Oregon, at South Slough and Haynes Inlet, spanning from ~ 1680 AD to the present. To reconstruct the historical water column oxygen...
Resource Type:: Article

Amelioration of Reproduction-Associated Oxidative Stress in a Viviparous Insect Is Critical to Prevent Reproductive Senescence

Creator:: Michalkova, Veronika, Benoit, Joshua B., Attardo, Geoffrey M., Medlock, Jan, and Aksoy, Serap
Abstract:: Impact of reproductive processes upon female health has yielded conflicting results; particularly in relation to the role of reproduction-associated stress. We used the viviparous tsetse fly to determine if lactation, birth and involution lead to damage from oxidative stress (OS) that impairs subsequent reproductive cycles. Tsetse females carry an intrauterine...
Resource Type:: Article

Risk-aware graph search with dynamic edge cost discovery

Creator:: Chung, Jen Jen, Smith, Andrew J., Skeele, Ryan, and Hollinger, Geoffrey A.
Abstract:: In this paper, we introduce a novel algorithm for incorporating uncertainty into lookahead planning. Our algorithm searches through connected graphs with uncertain edge costs represented by known probability distributions. As a robot moves through the graph, the true edge costs of adjacent edges are revealed to the planner prior to...
Resource Type:: Article
Full Text:: , Ryan Skeele3 and Geoffrey A Hollinger2 Abstract In this paper, we introduce a novel algorithm for

Learning Uncertainty in Ocean Current Predictions for Safe and Reliable Navigation of Underwater Vehicles

Creator:: Hollinger, Geoffrey A., Pereira, Arvind A., Binney, Jonathan, Somers, Thane, and Sukhatme, Gaurav S.
Abstract:: Operating autonomous underwater vehicles (AUVs) near shore is challenging—heavy shipping traffic and other hazards threaten AUV safety at the surface, and strong ocean currents impede navigation when underwater. Predictive models of ocean currents have been shown to improve navigation accuracy, but these forecasts are typically noisy, making it challenging to...
Resource Type:: Article
Full Text:: safe and reliable navigation of underwater vehicles Geoffrey A. Hollinger∗ Robotics Program School

Distributed Data Fusion for Multirobot Search

Creator:: Hollinger, Geoffrey A., Yerramalli, Srinivas, Singh, Sanjiv, Mitra, Urbashi, and Sukhatme, Gaurav S.
Abstract:: This paper presents novel data fusion methods that enable teams of vehicles to perform target search tasks without guaranteed communication. Techniques are introduced for merging estimates of a target’s position from vehicles that regain contact after long periods of time, and a fully distributed team planning algorithm is proposed that...
Resource Type:: Article
Full Text:: IEEE TRANSACTIONS ON ROBOTICS 1 Distributed Data Fusion for Multi-robot Search Geoffrey A. Hollinger

Environmental temperature sensing using Raman spectra DTS fiber-optic methods

Creator:: Tyler, Scott W., Selker, John S., Hausner, Mark B., Hatch, Christine E., Torgersen, Thomas, Thodal, Carl E., and Schladow, S. Geoffrey
Abstract:: Raman spectra distributed temperature sensing (DTS) by fiber-optic cables has recently shown considerable promise for the measuring and monitoring of surface and near-surface hydrologic processes such as groundwater–surface water interaction, borehole circulation, snow hydrology, soil moisture studies, and land surface energy exchanges. DTS systems uniquely provide the opportunity to monitor...
Resource Type:: Article
Full Text:: Torgersen,4 Carl E. Thodal,5 and S. Geoffrey Schladow6 Received 31 March 2008; revised 29 May 2008

In situ enrichment of ocean crust microbes on igneous minerals and glasses using an osmotic flow‐through device

Creator:: Smith, Amy, Popa, Radu, Fisk, Martin, Nielsen, Mark, Wheat, C. Geoffrey, Jannasch, Hans W., Fisher, Andrew T., Becker, Keir, Sievert, Stefan M., and Flores, Gilberto
Abstract:: The Integrated Ocean Drilling Program (IODP) Hole 1301A on the eastern flank of Juan de Fuca Ridge was used in the first long-term deployment of microbial enrichment flow cells using osmotically driven pumps in a subseafloor borehole. Three novel osmotically driven colonization systems with unidirectional flow were deployed in the...
Resource Type:: Article
Full Text:: Evolutionary Biology, Harvard University, Cambridge, Massachusetts 02138, USA C. Geoffrey Wheat School of

ScholarsArchive@OSU

Non-Invasive Sampling of Schistosomes from Humans Requires Correcting for Family Structure

Sampling-based robotic information gathering algorithms

Association of Juvenile Salmon and Estuarine Fish with Intertidal Seagrass and Oyster Aquaculture Habitats in a Northeast Pacific Estuary

Estuarine Dissolved Oxygen History Inferred from Sedimentary Trace Metal and Organic Matter Preservation

Amelioration of Reproduction-Associated Oxidative Stress in a Viviparous Insect Is Critical to Prevent Reproductive Senescence

Risk-aware graph search with dynamic edge cost discovery

Learning Uncertainty in Ocean Current Predictions for Safe and Reliable Navigation of Underwater Vehicles

Distributed Data Fusion for Multirobot Search

Environmental temperature sensing using Raman spectra DTS fiber-optic methods

In situ enrichment of ocean crust microbes on igneous minerals and glasses using an osmotic flow‐through device

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