Index Catalog // ScholarsArchive@OSU

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...
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Full Text:: Information Gathering Algorithms Geoffrey A. Hollinger∗ and Gaurav S. Sukhatme† August 12, 2014 Abstract

Creator:: Smith, Andrew J. and Hollinger, Geoffrey A.
Abstract:: This work proposes a technique for distributed multi-robot exploration that leverages novel methods of map inference. The inference technique uses observed map structure to infer unobserved map features. The team then coordinates to explore both the inferred and observed portions of the map. Individual robots select exploration poses by accounting...
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Full Text:: ) Distributed Inference-Based Multi-Robot Exploration Andrew J. Smith · Geoffrey A. Hollinger Received: date

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...
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Full Text:: , Ryan Skeele3 and Geoffrey A Hollinger2 Abstract In this paper, we introduce a novel algorithm for

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...
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Full Text:: safe and reliable navigation of underwater vehicles Geoffrey A. Hollinger∗ Robotics Program School

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...
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Full Text:: IEEE TRANSACTIONS ON ROBOTICS 1 Distributed Data Fusion for Multi-robot Search Geoffrey A. Hollinger

Creator:: Hulme, Samuel M., Wheat, C. Geoffrey, Coggon, Rosalind M., and McManus, James
Abstract:: The data presented in this report demonstrate significant improvements in the ability to constrain trace element and Sr isotopic concentrations in sediments overlying ridge-flank hydrothermal systems. Improved sampling methods orchestrated by the Integrated Ocean Drilling Program (i.e., advanced piston coring and anoxic sample processing) enabled the collection of reactive pore...
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Full Text:: | Volume 301 Fisher, A.T., Urabe, T., Klaus, A., and the Expedition 301 Scientists Proceedings of the

Creator:: Wheat, C. Geoffrey and McManus, James
Abstract:: We present concentrations of germanium and silicon in sediment pore waters, basaltic formation fluids, and bulk sediment from three ridge flank hydrothermal systems (RFHS). Basaltic formation fluids from warm (>30°C) RFHS have much higher Ge concentrations and Ge:Si molar ratios than overlying sediment pore waters, requiring seawater-basalt reactions to dominate...
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Full Text:: fluids C. Geoffrey Wheat Global Undersea Research Unit, University of Alaska Fairbanks, P.O. Box 475

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...
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Creator:: Loescher, H. W., Law, B. E., Mahrt, Larry, Hollinger, D. Y., Campbell, J., and Wofsy, S. C.
Abstract:: Whole ecosystem carbon dioxide (CO₂) exchange estimated with the eddy covariance (EC) technique has been central to studies on the responses of terrestrial ecosystems to disturbance and intra‐annual and interannual variations in climate, but challenges exist in understanding and reducing the uncertainty in estimates of net ecosystem exchange (NEE) of...
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Full Text:: ) flux data [Hollinger and Richardson, 2005; Richardson et al., 2006]. In the case of a closed path

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...
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