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Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.

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Significant seismic behavior features of two tall buildings inferred from response records Significant seismic behavior features of two tall buildings inferred from response records

In this paper, recent studies of recorded responses of behavior and performances of two instrumented tall buildings subjected to long-period motions from events that originate at far distances (e.g. 100-800km) are presented. Significant results indicate that (a) computed average drift ratios are substantial (~0.5%), and (b) there is permanent shift of fundamental frequencies for a tall...
Authors
Mehmet Celebi
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center

Integrating the sociology of space with geospatial semantics relation properties for data graphs Integrating the sociology of space with geospatial semantics relation properties for data graphs

This research posits that socially constructed spatial relations address concepts of interactions instead of intersections, human/tool agents instead of physical processes, and broader ranges of geographical outcomes. The hypothesis is that social space can be represented by using patterns of logic relations between sets of entities. The data corpus of spatial relations was extracted...
Authors
Dalia E. Varanka
By
Core Science Systems Mission Area, Center of Excellence for Geospatial Information Science (CEGIS), National Geospatial Technical Operations Center

Seamless numerical simulation of a hazard cascade in which a landslide triggers a dam-breach flood and consequent debris flow Seamless numerical simulation of a hazard cascade in which a landslide triggers a dam-breach flood and consequent debris flow

Numerical simulations of hazard cascades downstream from moraine-dammed lakes commonly must specify linkages between models of discrete processes such as wave overtopping, dam breaching, erosion, and downstream floods or debris flows. Such linkages can be rather arbitrary and can detract from the ability to accurately conserve mass and momentum during complex sequences of events. Here we
Authors
David L. George, Richard M. Iverson, Charles M. Cannon
By
Volcano Hazards Program, Geology, Minerals, Energy, and Geophysics Science Center, Volcano Science Center

Assessment of the American woodcock singing-ground survey zone timing and coverage Assessment of the American woodcock singing-ground survey zone timing and coverage

The American woodcock (Scolopax minor; hereafter, woodcock) Singing-Ground Survey (SGS) was developed to inform management decisions by monitoring changes in the relative abundance of woodcock. The timing of the designated survey windows was designed to count resident woodcock while minimizing counting of migrating woodcock. Since the implementation of the SGS in 1968, concerns over...
Authors
J. D. Moore, Thomas R. Cooper, Rebecca D. Rau, David E. Andersen, J. P Duguay, C. Alan Stewart, David G. Krementz
By
Cooperative Research Units

Estimating density and effective area surveyed for American woodcock Estimating density and effective area surveyed for American woodcock

The American Woodcock (Scolopax minor; hereafter, woodcock) Singing-ground Survey (SGS) is conducted annually during the woodcock breeding season, and survey points along survey routes are set 0.4 mile (0.65 km) apart to avoid counting individual birds from >1 listening location. The effective area surveyed (EAS) at a listening point is not known, and may vary as a function of land-cover...
Authors
Stefanie M. Bergh, David E. Andersen
By
Cooperative Research Units

Detection probability and occupancy of American woodcock during Singing-ground surveys Detection probability and occupancy of American woodcock during Singing-ground surveys

The Singing-ground Survey (SGS) was designed to exploit the conspicuous breeding-season display of male American woodcock (Scolopax minor; hereafter, woodcock) to monitor these otherwise inconspicuous birds. The SGS was standardized in 1968 and has since been conducted annually to derive an index of abundance and population trend. Counts of singing male woodcock on the SGS have generally...
Authors
Stefanie M. Bergh, David E. Andersen
By
Cooperative Research Units
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