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Full-Text Articles in Physical Sciences and Mathematics
3d Oceanographic Data Compression Using 3d-Odetlap, You Li, Tsz-Yam Lau, Christopher S. Stuetzle, Peter Fox, W. Randolph Franklin
3d Oceanographic Data Compression Using 3d-Odetlap, You Li, Tsz-Yam Lau, Christopher S. Stuetzle, Peter Fox, W. Randolph Franklin
Computer Science Faculty Publications
This paper describes a 3D environmental data compression technique for oceanographic datasets. With proper point selection, our method approximates uncompressed marine data using an over-determined system of linear equations based on, but essentially different from, the Laplacian partial differential equation. Then this approximation is refined via an error metric. These two steps work alternatively until a predefined satisfying approximation is found. Using several different datasets and metrics, we demonstrate that our method has an excellent compression ratio. To further evaluate our method, we compare it with 3D-SPIHT. 3D-ODETLAP averages 20% better compression than 3D-SPIHT on our eight test datasets, from …
Quantitative Analysis Of Simulated Erosion For Different Soils, Zhongxian Chen, Christopher S. Stuetzle, Barbara Cutler, Jared Gross, W. Randolph Franklin, Thomas F. Zimmie
Quantitative Analysis Of Simulated Erosion For Different Soils, Zhongxian Chen, Christopher S. Stuetzle, Barbara Cutler, Jared Gross, W. Randolph Franklin, Thomas F. Zimmie
Computer Science Faculty Publications
Levee overtopping can lead to failure and cause catastrophic damage, as was the case during Hurricane Katrina. We present a computer simulation of erosion to study the development of the rills and gullies that form along an earthen embankment during overtopping. We have coupled 3D Smoothed Particle Hydrodynamics with an erodibility model to produce our simulation. Through comparison between simulations and between simulation and analogous laboratory experiments, we provide quantitative and qualitative results, evaluating the accuracy of our simulation.
The Greening Of The Information Systems Curriculum, Patricia Sendall, Li-Jen Shannon, Alan Peslak, Bruce Saulnier
The Greening Of The Information Systems Curriculum, Patricia Sendall, Li-Jen Shannon, Alan Peslak, Bruce Saulnier
Organization Studies and Analytics Faculty Publications
The purpose of this study is related to Green Information Technology (IT), Green Computing, and/or Sustainability (GITS) curriculum initiatives in institutions of higher education in the US and abroad. The purpose of this study is threefold; 1) to evaluate whether GITS academic programs have been initiated in higher educational organizations; 2) to analyze if GITS programs and/or courses are currently in place; and 3) to investigate the conceptual framework of GITS across campuses.
Simulating Levee Erosion With Physical Modeling Validation, Jared Gross, Christopher S. Stuetzle, Zhongxian Chen, Barbara Cutler, W. Randolph Franklin, Thomas F. Zimmie
Simulating Levee Erosion With Physical Modeling Validation, Jared Gross, Christopher S. Stuetzle, Zhongxian Chen, Barbara Cutler, W. Randolph Franklin, Thomas F. Zimmie
Computer Science Faculty Publications
This paper studies rill and gully initiation and propagation on levees, dams, and general earth embankments. It specifically studies where these erosion features occur, and how long a particular embankment can sustain overtopping before breaching and catastrophic failure. This contrasts to previous levee erosion analysis, which has primarily concerned the final effects of erosion, such as soil loss, depth of scour and breach width. This paper describes the construction of scaled-down physical models of levees composed of different homogeneous sands, as well as sand-clay mixtures, and their laboratory testing. A 3-D laser range scanner captured the surface features of the …
Exotic Smoothness In Four Dimensions And Euclidean Quantum Gravity, Christopher L. Duston
Exotic Smoothness In Four Dimensions And Euclidean Quantum Gravity, Christopher L. Duston
Physics Faculty Publications
In this paper we calculate the effect of the inclusion of exotic smooth structures on typical observables in Euclidean quantum gravity. We do this in the semiclassical regime for several gravitational free-field actions and find that the results are similar, independent of the particular action that is chosen. These are the first results of their kind in dimension four, which we extend to include one-loop contributions as well. We find these topological features can have physically significant results without the need for additional exotic physics.