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2000

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A Small-System Ensemble Monte Carlo Simulation Of Supersaturated Vapor: Evaluation Of Barrier To Nucleation, K.J. Oh, Xiao Cheng Zeng Jan 2000

A Small-System Ensemble Monte Carlo Simulation Of Supersaturated Vapor: Evaluation Of Barrier To Nucleation, K.J. Oh, Xiao Cheng Zeng

Xiao Cheng Zeng Publications

A small-system grand canonical ensemble Monte Carlo method is developed to evaluate cluster size distribution and barrier to the nucleation in a supersaturated Lennard-Jones vapor. The theoretical foundation is a physical cluster theory in which the Stillinger cluster is used as a prototypical physical cluster. Using method of Mayer’s cluster expansion, the cluster–vapor interaction is effectively taken into account. From a separate canonical ensemble Monte Carlo simulation using a test particle method, the averaged volume of the cluster is obtained and is also incorporated in the small-system ensemble simulation. By this implementation our simulation is computationally more efficient compared to …

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Calamus River Valley Map, University Of Nebraska - Lincoln Jan 2000

Calamus River Valley Map, University Of Nebraska - Lincoln

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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County Names/Numbers, University Of Nebraska - Lincoln Jan 2000

County Names/Numbers, University Of Nebraska - Lincoln

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Natural Resource Districts In Nebraska, Nebraska Natural Resource Commission Jan 2000

Natural Resource Districts In Nebraska, Nebraska Natural Resource Commission

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Nebraska Information, Number Of Topographical Maps Per County, University Of Nebraska - Lincoln Jan 2000

Nebraska Information, Number Of Topographical Maps Per County, University Of Nebraska - Lincoln

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Overland Trails, University Of Nebraska - Lincoln Jan 2000

Overland Trails, University Of Nebraska - Lincoln

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Nebraska Map Of Counties, Conservation And Survey Division Jan 2000

Nebraska Map Of Counties, Conservation And Survey Division

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Entrainment Response Of Bed Sediment To Time-Varying Flows, David M. Admiraal, Marcelo H. Gracia, Jose F. Rodriguez Jan 2000

Entrainment Response Of Bed Sediment To Time-Varying Flows, David M. Admiraal, Marcelo H. Gracia, Jose F. Rodriguez

Department of Civil and Environmental Engineering: Faculty Publications

Unsteady flows are ubiquitous in nature. In order to understand the behavior of sediment when subjected to unsteady flows, a set of experiments was performed in a rectangular duct with a mobile bed. A computer-operated vale governed the velocity of the water in the duct, and the flow velocity, wall shear stress, and vertical distribution of suspended sediment were simultaneously measured. Beds composed of 120 um and 580 um diameter sand were investigated. Both quasi-steady flows and pulse flows were investigated. Both quasi-steady flows and pulse flows were simulated in the duct. For the pulse flows the water was accelerated …

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Distribution And Thickness Of Glacial Till In Nebraska. Jan 2000

Distribution And Thickness Of Glacial Till In Nebraska.

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Metric System Vs. Inch-Pound Units Jan 2000

Metric System Vs. Inch-Pound Units

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Chase County Test Hole Logs, Vincent H. Dreeszen Jan 2000

Chase County Test Hole Logs, Vincent H. Dreeszen

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Dakota County Test Hole Logs, Raymond R. Burchett, Frank A. Smith Jan 2000

Dakota County Test Hole Logs, Raymond R. Burchett, Frank A. Smith

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Custer County Test Hole Logs, Larry D. Cast Jan 2000

Custer County Test Hole Logs, Larry D. Cast

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Gosper County Test Hole Logs, Larry D. Cast Jan 2000

Gosper County Test Hole Logs, Larry D. Cast

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Garden County Test Hole Logs, Frank A. Smith Jan 2000

Garden County Test Hole Logs, Frank A. Smith

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Kimball County Test Hole Logs, Frank A. Smith Jan 2000

Kimball County Test Hole Logs, Frank A. Smith

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Preliminary Results Of Bitumen And Whole-Rock Elemental Analyses Of Crp-2/2a, Victoria Land Basin, Antarctica, Richard Kettler, E. Papastavros Jan 2000

Preliminary Results Of Bitumen And Whole-Rock Elemental Analyses Of Crp-2/2a, Victoria Land Basin, Antarctica, Richard Kettler, E. Papastavros

Department of Earth and Atmospheric Sciences: Faculty Publications

Sediments and rocks recovered in CRP-2/2A coring operations contain relatively little organic matter (average TOC=0.28%) and very small amounts of solvent-soluble organic matter. Because Early Oligocene sediment included significant amounts of coal detritus, TOC values are higher in Early Oligocene rocks than in younger rocks. TOC values are highest in the fine-grained rocks deposited as part of the highstand systems tract (HST) and TOC values decrease from the bottom to the top of the HST. The TOC:TN ratios observed in the CRP-2/2A core typically exceed 10, and are strong evidence that the preserved organic matter comprises a mixture of detrital …

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Laser-Derived, Particle Size Data From Crp-2/2a: Implications For Sequence And Seismic Stratigraphy, K J. Woolfe, L K. Stewart, Christopher R. Fielding, M Lavelle Jan 2000

Laser-Derived, Particle Size Data From Crp-2/2a: Implications For Sequence And Seismic Stratigraphy, K J. Woolfe, L K. Stewart, Christopher R. Fielding, M Lavelle

Department of Earth and Atmospheric Sciences: Faculty Publications

Gravel-free, high-resolution (1-metre spacing, 32 channel) particle size data from the CRP-2/2A drill core indicate that many of the diamictites were likely deposited from floating ice. Textural dislocations occur at most sequence boundaries and provide independent corroboration of the sequence stratigraphic interpretation. Likewise the data largely support the correlation drawn (Fielding et al., this volume) between the sequence stratigraphic cycles and the regional seismic stratigraphy (an alternative correlation to Reflector ‘f’ is also suggested). The gravel-free data appear to be reflecting predominantly regional (global?) forcing with some possible local effects, and long-term trends persisting through gravelly textural dislocations.

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Morphology And Taxonomic Position Of The Late Cretaceous Diatom Genus Pomphodiscus Barker & Meakin, Vladimir A. Nikolaev, David M. Harwood Jan 2000

Morphology And Taxonomic Position Of The Late Cretaceous Diatom Genus Pomphodiscus Barker & Meakin, Vladimir A. Nikolaev, David M. Harwood

Department of Earth and Atmospheric Sciences: Faculty Publications

Results from our investigation of Upper Cretaceous diatoms from the Marca Shale Member of the Moreno Shale in California and from Ocean Drilling Program (ODP) Hole 748C on the Kerguelen Plateau ,Southern Indian Ocean enable a clarification of the taxonomic position of several diatoms. Differences in areola structure ,a primary and conservative character of the diatom valve, are used to separate diatoms recently included in the genus Benetorus. We resurrect he genus Pomphodiscusto include species with locular areolae, a central rimoportula ,and a central inflated chamber .We propose the new species Pomphodiscusk erguelensisn. sp. and new combination Pomphodiscusc …

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Oligocene And Lower Miocene Siliceous Microfossil Biostratigraphy Of Cape Roberts Project Core Crp-2/2a, Victoria Land Basin, Antarctica, R. Scherer, S. M. Bohaty, David M. Harwood Jan 2000

Oligocene And Lower Miocene Siliceous Microfossil Biostratigraphy Of Cape Roberts Project Core Crp-2/2a, Victoria Land Basin, Antarctica, R. Scherer, S. M. Bohaty, David M. Harwood

Department of Earth and Atmospheric Sciences: Faculty Publications

Marine diatoms are the primary biostratigraphical and palaeoenvironmental tool for interpreting the upper Palaeogene and lower Neogene strata recovered during the second drilling season of the Cape Roberts Project at site CRP-2 in the western Ross Sea, Antarctica. Silicoflagellates, ebridians, and a chrysophyte cyst provide supporting biostratigraphical information. More than 100 dominantly planktic diatom taxa are recognised. Of these, more than 30 are treated informally, pending SEM examination and formal description. Many other taxa are noted only to generic level. Lower Oligocene (c. 31Ma) through lower Miocene (c. 18.5 Ma) diatoms occur from 28 mbsf down to 565 …

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Nutrients As A Link Between Ionic Concentration/Composition And Diatom Distributions In Saline Lakes, J. E. Saros, Sherilyn C. Fritz Jan 2000

Nutrients As A Link Between Ionic Concentration/Composition And Diatom Distributions In Saline Lakes, J. E. Saros, Sherilyn C. Fritz

Department of Earth and Atmospheric Sciences: Faculty Publications

Diatom profiles in closed-basin lake sediments are commonly used to reconstruct climate change based on the observed correlations between salinity (ionic concentration) and modern diatom assemblages. Diatom assemblages are strongly correlated not only with salinity but also anion composition, with certain taxa characteristic of carbonate systems and others sulfate-dominated waters. Although strong correlations exist, the actual mechanisms behind these correlations are unknown. Here we briefly review the influence of salinity and ionic composition on nutrient dynamics in saline lakes and suggest that these interactions may drive shifts in diatom species composition along gradients of ionic concentration/ composition. We discuss the …

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Clay Mineral Composition Of Glacial Erratics, Mcmurdo Sound, Mary Anne Holmes Jan 2000

Clay Mineral Composition Of Glacial Erratics, Mcmurdo Sound, Mary Anne Holmes

Department of Earth and Atmospheric Sciences: Faculty Publications

Twenty-two erratics collected from coastal moraines along the shores of Mount Discovery, Brown Peninsula, Minna Bluff, on Black Island, and from the Salmon and Miers valley floors in East Antarctica were examined for their mineral composition in the <2 m fraction by x-ray diffraction to determine their provenance and the climate under which the sediment in the erratics formed. Semi-quantitative results from peak areas were subjected to principal components analysis and indicate that there are two distinct mineral compositions in the erratics (C = 0.05): A) dominant smectite group minerals, minor illite and kaolinite, and no chlorite, and B) dominant illite, subordinate smectite group, and either chlorite and R=l US clay or R=3 US clay. Group A erratics include two types: 1) Eocene age siliciclastic sediment and 2) volcaniclastics of unknown age. Group B erratics comprise three types: 1) Eocene age siliciclastic sediment dominated by illite with subordinate smectite, no chlorite, and very low levels of kaolinite and mixed-layer clays; 2) post Eocene age erratics dominated by illite with a major component of chlorite and R=l US clay, minor or no smectite and kaolinite; and 3) post Eocene age erratics dominated by illite and containing R=3 US clay. Eocene age sediment occurs in either group and so had two distinct provenances for the clay fraction: a smectite-dominant area and an illite-rich, smectite-poor area. Post Eocene age sediment also had two distinct provenances for the clay fraction and are different from the Eocene sources: a metamorphic + ancient sedimentary terrain that supplied chlorite, illite, and R=l US clay to some of the erratics, and a sedimentary terrain that supplied illite and R=3 US clay. Kaolinite levels are low, indicating the absence of intense weathering and/or any significant contribution from the Beacon Supergroup.

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Isotopic Signature Of Burial Diagenesis And Primary Lithological Contrasts In Periplatform Carbonates (Miocene, Great Bahama Bank), Tracy D. Frank, Karin Bernet Jan 2000

Isotopic Signature Of Burial Diagenesis And Primary Lithological Contrasts In Periplatform Carbonates (Miocene, Great Bahama Bank), Tracy D. Frank, Karin Bernet

Department of Earth and Atmospheric Sciences: Faculty Publications

The stable isotope geochemistry of Miocene sediments from the leeward margin of the Great Bahama Bank was examined to investigate burial diagenetic processes in periplatform carbonates. Data indicate that, in addition to differences in bulk proportions of neritic and pelagic carbonate along the slope, rhythmic variation in primary carbonate content has controlled patterns of burial diagenesis and associated geochemical signatures throughout much of the succession examined. The present study focuses on Ocean Drilling Program Sites 1006 and 1007, the most distal of five sites drilled from marginal to deep basin environments during Leg 166. These Miocene sections are characterized by …

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An Analysis Of Messages Posted To The Lm_Net Listserv By School Library Media Specialists, Jennifer L. Brown Jan 2000

An Analysis Of Messages Posted To The Lm_Net Listserv By School Library Media Specialists, Jennifer L. Brown

Graduate Research Papers

This research examined messages sent to the LM _NET (School Library Media and Network Communications) listserv by school library media specialists during the month of October, 1999. A content analysis was used to address the first research question: "What areas of concern are school library media specialists who are LM _ NET subscribers addressing with their questions and postings to the LM _ NET community?" The second research question, "Are there underlying patterns addressed in LM _ NET messages posted by school library media specialists?" was approached with a textual analysis. The researcher used a sample of 95 messages that …

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Enhanced Three-Dimensional Reconstruction Of Surfaces Using Multicolor Gratings, Bernard S. Gilbert, Joel H. Blatt Jan 2000

Enhanced Three-Dimensional Reconstruction Of Surfaces Using Multicolor Gratings, Bernard S. Gilbert, Joel H. Blatt

Aerospace, Physics, and Space Science Faculty Publications

Most optical topolography systems use a single-wavelength laser for projection, using a swept spot, a moving line, or a projected grating. In a typical projected grating system, the gratings are shifted and a series of images is used to recover the 3-D shape of the target. When the series of images is analyzed in the normal phase shift manner, the resulting 2-D phase map typically has phase unwrapping problems due to noise and Nyquist limits. Surfaces with large vertical discontinuities present a problem for phase unwrapping 3-D shape recovery. We look at simultaneously projecting multiple wavelengths onto a surface to …

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Interactive Health Information Web Services For Business Settings, Nadezhda Soloukhina Jan 2000

Interactive Health Information Web Services For Business Settings, Nadezhda Soloukhina

Graduate Research Papers

With the increase in the cost of healthcare many business in the United States are becoming self-insured or relying on managed healthcare organizations to provide healthcare. Employee wellness programs are playing a more pivotal role in the healthcare strategies of medium size to large size business. On average, according to the surveys, these companies spend $40 per employee per year on wellness programs. This research summarizes the needs to provide interactive health information services to complement employee wellness program of business in the US, and describes the procedures of developing health information kiosks.

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Protecting Patient Rights Despite Erisa: Will The Supreme Court Allow States To Regulate Managed Care?, Donald T. Bogan Jan 2000

Protecting Patient Rights Despite Erisa: Will The Supreme Court Allow States To Regulate Managed Care?, Donald T. Bogan

Faculty Articles

No abstract provided.

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International Child Custody Jurisdiction And The Uniform Child Custody Jurisdiction And Enforcement Act, Robert G. Spector Jan 2000

International Child Custody Jurisdiction And The Uniform Child Custody Jurisdiction And Enforcement Act, Robert G. Spector

Faculty Articles

No abstract provided.

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Biology And Ecology Of Rivulus Marmoratus: New Insights And A Review, D. Scott Taylor Jan 2000

Biology And Ecology Of Rivulus Marmoratus: New Insights And A Review, D. Scott Taylor

Ocean Engineering and Marine Sciences Faculty Publications

Rivulus marmoratus (Pisces: Aplocheilidae) is a small cyprinodontid indigenous to mangroves of the western tropical Atlantic. This species is well known as the only selffertilizing, hermaphroditic vertebrate, and populations normally consist of genetically diverse groups of homozygous clones. However, male fish are known from a few populations, and outcrossing and heterozygosity have been documented from two areas in Central America. Rivulus marmoratus also exhibits a number of behaviors and environmental tolerances unusual in fishes, and since the species is secretive, rare in some habitats and difficult to collect, knowledge of its natural history has been limited until recently. Within the …

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Bayesian Spectrum Analysis For Laser Vibrometry Processing, Walter F. Buell, Bradley Allan Shadwick, Robert W. Farley Jan 2000

Bayesian Spectrum Analysis For Laser Vibrometry Processing, Walter F. Buell, Bradley Allan Shadwick, Robert W. Farley

Department of Physics and Astronomy: Faculty Publications

Laser vibration sensing provides a sensitive non-contact means of measuring vibrations of objects. These measurements are used in industrial quality control and wear monitoring as well as the analysis of the vibrational characteristics of objects. In laser vibrometry, the surface motion is monitored by heterodyne laser Doppler velocimetry, and the received heterodyne signal is sampled to produce a time-series which is processed to obtain a vibrational spectrum of the object under test. Laser vibrometry data has been processed with a traditional FM discriminator approach and by spectrogram and time-frequency distribution processing techniques. The latter techniques have demonstrated improved performance over …

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