Physical Sciences and Mathematics | Open Access Articles

Tr-2007021: Row-Column Pivoting In Gaussian Elimination, Victor Y. Pan, Guoliang Qian, Ai-Long Zheng, Severin Ngnosse

Computer Science Technical Reports

No abstract provided.

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Tr-2007022: The Schur Aggregation For Linear Systems And Determinants, V. Y. Pan, B. Murphy, G. Qian, R. E. Rosholt

Computer Science Technical Reports

No abstract provided.

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Tr-2007023: The Schur Aggregation For Linear Systems And Determinants, V. Y. Pan, B. Murphy, G. Qian, R. E. Rosholt

Computer Science Technical Reports

No abstract provided.

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Tr-2007024: A Register-Free Abstract Prolog Machine With Jumbo Instructions, Neng-Fa Zhou

Computer Science Technical Reports

No abstract provided.

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Scientists Are Urged To Look For Extraterrestrial Life Forms, Aldemaro Romero Jr., David Gilmore

Publications and Research

No abstract provided.

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Generalized Geologic Map For Land-Use Planning: Green County, Kentucky, Daniel I. Carey, Adam Pike

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Generalized Geologic Map For Land-Use Planning: Martin County, Kentucky, Daniel I. Carey

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Generalized Geologic Map For Land-Use Planning: Morgan County, Kentucky, Daniel I. Carey

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Generalized Geologic Map For Land-Use Planning: Johnson County, Kentucky, Daniel I. Carey

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Generalized Geologic Map For Land-Use Planning: Bell County, Kentucky, Daniel I. Carey

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Generalized Geologic Map For Land-Use Planning: Knox County, Kentucky, Daniel I. Carey, John Storm

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Generalized Geologic Map For Land-Use Planning: Menifee County, Kentucky, Daniel I. Carey, Peter Eclov

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Generalized Geologic Map For Land-Use Planning: Magoffin County, Kentucky, Daniel I. Carey

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Generalized Geologic Map For Land-Use Planning: Breathitt County, Kentucky, Daniel I. Carey, Sally Sloan

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Generalized Geologic Map For Land-Use Planning: Lee County, Kentucky, Daniel I. Carey, Peter Eclov

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Generalized Geologic Map For Land-Use Planning: Bath County, Kentucky, Daniel I. Carey

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Generalized Geologic Map For Land-Use Planning: Floyd County, Kentucky, Daniel I. Carey

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Generalized Geologic Map For Land-Use Planning: Monroe County, Kentucky, Daniel I. Carey

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Generalized Geologic Map For Land-Use Planning: Greenup County, Kentucky, Daniel I. Carey

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

Go to article

Generalized Geologic Map For Land-Use Planning: Casey County, Kentucky, Daniel I. Carey, Garland R. Dever Jr.

Map and Chart--KGS

This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.

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Vorticity Dynamics And Sound Generation In Two-Dimensional Fluid Flow, Raymond J. Nagem, Guido Sandri, David Uminsky

Mathematics

An approximate solution to the two-dimensional incompressible fluid equations is constructed by expanding the vorticity field in a series of derivatives of a Gaussian vortex. The expansion is used to analyze the motion of a corotating Gaussian vortex pair, and the spatial rotation frequency of the vortex pair is derived directly from the fluid vorticity equation. The resulting rotation frequency includes the effects of finite vortex core size and viscosity and reduces, in the appropriate limit, to the rotation frequency of the Kirchhoff point vortex theory. The expansion is then used in the low Mach number Lighthill equation to derive …

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Relationships Between Braid Length And The Number Of Braid Strands, Cornelia A. Van Cott

Mathematics

For a knot K, let ℓ(K,n) be the minimum length of an n–stranded braid representative of K. Fixing a knot K, ℓ(K,n) can be viewed as a function of n, which we denote by ℓK(n). Examples of knots exist for which ℓK(n) is a nonincreasing function. We investigate the behavior of ℓK(n), developing bounds on the function in terms of the genus of K. The bounds lead to the conclusion that for any knot K the function ℓK(n) is eventually stable. We study the stable behavior of ℓK(n), with stronger results for homogeneous knots. For knots of nine or fewer …

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Π01 Classes And Strong Degree Spectra Of Relations, John Chisholm, Jennifer Chubb, Valentina S. Harizanov, Denise R. Hirschfeldt, Carl G. Jockusch, Timothy H. Mcnicholl, Sarah Pingrey

Mathematics

We study the weak truth-table and truth-table degrees of the images of subsets of computable structures under isomorphisms between computable structures. In particular, we show that there is a low c.e. set that is not weak truth-table reducible to any initial segment of any scattered computable linear order. Countable Π⁰₁ subsets of 2^w and Kolmogorov complexity play a major role in the proof.

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Unbounded Regions Of Infinitely Logconcave Sequences, David Uminsky, Karen Yeats

Mathematics

We study the properties of a logconcavity operator on a symmetric, unimodal subset of finite sequences. In doing so we are able to prove that there is a large unbounded region in this subset that is ∞-logconcave. This problem was motivated by the conjecture of Boros and Moll in [1] that the binomial coefficients are ∞-logconcave.

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Search For Σ(5)(0), N(5)(0), And Θ++ Pentaquark States, Y. Qiang, Timothy Holmstrom, Jefferson Lab Hall Collaboration

Chemistry & Physics Faculty Publications

A high-resolution (σ_instr.=1.5 MeV) search for narrow states (ΓMeV) with masses of M_x≈1500–1850 MeV in ep→e^′K⁺X,e^′K^-X, and e^′π⁺X electroproduction at small angles and low Q² was performed. These states would be candidate partner states of the reported Θ⁺(1540) pentaquark. No statistically significant signal was observed in any of the channels at 90% C.L. Upper limits on forward production were determined to be between 0.8% and 4.9% of the Λ(1520) production cross section, depending on the channel and the assumed mass and …

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Source Code Protection For Applications Written In Microsoft Excel And Google Spreadsheet, Thomas A. Grossman Jr.

Business Analytics and Information Systems

Spreadsheets are used to develop application software that is distributed to users. Unfortunately, the users often have the ability to change the programming statements (“source code”) of the spreadsheet application. This causes a host of problems. By critically examining the suitability of spreadsheet computer programming languages for application development, six “application development features” are identified, with source code protection being the most important. We investigate the status of these features and discuss how they might be implemented in the dominant Microsoft Excel spreadsheet and in the new Google Spreadsheet. Although Google Spreadsheet currently provides no source code control, its web-centric …

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Plant Assemblage Composition Explains And Predicts How Biodiversity Affects Salt Marsh Functioning, Gary Sullivan, John Callaway, Joy B. Zedler

Environmental Science

Knowing that diverse plantings enhanced biomass and nitrogen (N) accumulation in a restored California salt marsh, we asked if the “biodiversity effect” was due to species selection or complementarity. In a two-year greenhouse experiment, we found positive biodiversity effects on total, root, and shoot biomass, total and root N crop, and on biomass and N allocation; negative effects on root and shoot N concentration; and no effect on shoot N crop. Overyielding among trios and sextets was supported by significant deviations in observed yield from that expected relative to solo yields (D_T). However, both trios and sextets …

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Contrasting Biogeochemistry Of Six Trace Metals During The Rise And Decay Of A Spring Phytoplankton Bloom In San Francisco Bay, Allison C. Luengen, Peter T. Raimondi, A. Russell Flegal

Environmental Science

The spring 2003 phytoplankton bloom in South San Francisco Bay (South Bay) affected the cycling of Mn, Co, Zn, Ni, and Pb, but not Cu. We followed this diatom bloom for 2 months, capturing a peak in chlorophyll a (Chl a) of >150 µg L^-1 and then an increase in dissolved organic carbon of >400 µmol L^-1 as phytoplankton decomposed. To determine how the stages of the bloom affected metal concentrations, we used principal component analysis to reduce our 15 water chemistry variables into a bloom factor, a sorbent factor, and a decay factor. Increasing values of the …

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Investigating The Spring Bloom In San Francisco Bay: Links Between Water Chemistry, Metal Cycling, Mercury Speciation, And Phytoplankton Community Composition, Allison C. Luengen

Environmental Science

Investigating the spring bloom in San Francisco Bay: Links between water chemistry, metal cycling, mercury speciation, and phytoplankton community composition This dissertation addresses the relationship between two problems facing estuaries nationwide: nutrient enrichment and metal contamination. The focus is on the southern reach of San Francisco Bay, where high nutrient concentrations can control the magnitude of the predictably occurring spring phytoplankton bloom. The bloom in this study, in spring 2003, was one of the largest blooms on record, exceeding 150 μg L ^-1 of chlorophyll α. As the bloom grew, diatoms (e.g. Thalassiosira punctigera ) depleted dissolved nutrients from the …

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Fire Behavior Modeling To Assess Net Benefits Of Forest Treatments On Fire Hazard Mitigation And Bioenergy Production In Northeastern California, David J. Ganz, David Saah, Klaus Barber, Mark Nechodom

Environmental Science

The fire behavior modeling described here, conducted as part of the Biomass to Energy (B2E) life cycle assessment, is funded by the California Energy Commission to evaluate the potential net benefits associated with treating and utilizing forest biomass. The B2E project facilitates economic, environmental, energy, and effectiveness assessments of the potential public benefits associated with: (1) various options for treatment, disposition, and utilization of forest biomass and (2) energy production from biomass produced by forest remediation activities. The study models forest conditions, fire behavior and fuel changes over a 40-year period, under three fuel treatment scenarios: no treatment; harvest and …

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Full-Text Articles in Physical Sciences and Mathematics

Tr-2007021: Row-Column Pivoting In Gaussian Elimination, Victor Y. Pan, Guoliang Qian, Ai-Long Zheng, Severin Ngnosse

Computer Science Technical Reports

Tr-2007022: The Schur Aggregation For Linear Systems And Determinants, V. Y. Pan, B. Murphy, G. Qian, R. E. Rosholt

Computer Science Technical Reports

Tr-2007023: The Schur Aggregation For Linear Systems And Determinants, V. Y. Pan, B. Murphy, G. Qian, R. E. Rosholt

Computer Science Technical Reports

Tr-2007024: A Register-Free Abstract Prolog Machine With Jumbo Instructions, Neng-Fa Zhou

Computer Science Technical Reports

Scientists Are Urged To Look For Extraterrestrial Life Forms, Aldemaro Romero Jr., David Gilmore

Publications and Research

Generalized Geologic Map For Land-Use Planning: Green County, Kentucky, Daniel I. Carey, Adam Pike

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Martin County, Kentucky, Daniel I. Carey

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Morgan County, Kentucky, Daniel I. Carey

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Johnson County, Kentucky, Daniel I. Carey

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Bell County, Kentucky, Daniel I. Carey

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Knox County, Kentucky, Daniel I. Carey, John Storm

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Menifee County, Kentucky, Daniel I. Carey, Peter Eclov

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Magoffin County, Kentucky, Daniel I. Carey

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Breathitt County, Kentucky, Daniel I. Carey, Sally Sloan

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Lee County, Kentucky, Daniel I. Carey, Peter Eclov

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Bath County, Kentucky, Daniel I. Carey

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Floyd County, Kentucky, Daniel I. Carey

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Monroe County, Kentucky, Daniel I. Carey

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Greenup County, Kentucky, Daniel I. Carey

Map and Chart--KGS

Generalized Geologic Map For Land-Use Planning: Casey County, Kentucky, Daniel I. Carey, Garland R. Dever Jr.

Map and Chart--KGS

Vorticity Dynamics And Sound Generation In Two-Dimensional Fluid Flow, Raymond J. Nagem, Guido Sandri, David Uminsky

Mathematics

Relationships Between Braid Length And The Number Of Braid Strands, Cornelia A. Van Cott

Mathematics

Π01 Classes And Strong Degree Spectra Of Relations, John Chisholm, Jennifer Chubb, Valentina S. Harizanov, Denise R. Hirschfeldt, Carl G. Jockusch, Timothy H. Mcnicholl, Sarah Pingrey

Mathematics

Unbounded Regions Of Infinitely Logconcave Sequences, David Uminsky, Karen Yeats

Mathematics

Search For Σ(5)(0), N(5)(0), And Θ++ Pentaquark States, Y. Qiang, Timothy Holmstrom, Jefferson Lab Hall Collaboration

Chemistry & Physics Faculty Publications

Source Code Protection For Applications Written In Microsoft Excel And Google Spreadsheet, Thomas A. Grossman Jr.

Business Analytics and Information Systems

Plant Assemblage Composition Explains And Predicts How Biodiversity Affects Salt Marsh Functioning, Gary Sullivan, John Callaway, Joy B. Zedler

Environmental Science

Contrasting Biogeochemistry Of Six Trace Metals During The Rise And Decay Of A Spring Phytoplankton Bloom In San Francisco Bay, Allison C. Luengen, Peter T. Raimondi, A. Russell Flegal

Environmental Science

Investigating The Spring Bloom In San Francisco Bay: Links Between Water Chemistry, Metal Cycling, Mercury Speciation, And Phytoplankton Community Composition, Allison C. Luengen

Environmental Science

Fire Behavior Modeling To Assess Net Benefits Of Forest Treatments On Fire Hazard Mitigation And Bioenergy Production In Northeastern California, David J. Ganz, David Saah, Klaus Barber, Mark Nechodom

Environmental Science