Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics Commons™

Open Access. Powered by Scholars. Published by Universities.®

2009

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 4441 - 4470 of 7615

Full-Text Articles in Physical Sciences and Mathematics

Introduction To The "Prisoners And Guards" Game, Eugen J. Ionascu, Tim Howard Jan 2009

Introduction To The "Prisoners And Guards" Game, Eugen J. Ionascu, Tim Howard

Faculty Bibliography

We study the half-dependent problem for the king graph Kn. We give proofs to establish the values h(Kn) for n ∈ {1, 2, 3, 4, 5, 6} and an upper bound for h(Kn) in general. These proofs are independent of computer assisted results. Also, we introduce a two-player game whose winning strategy is tightly related with the values h(Kn). This strategy is analyzed here for n = 3 and some facts are given for the case n = 4. Although the rules of the game are very simple, the winning strategy is highly complex even for n = 4.

Go to article

Lophorhothon., David R. Schwimmer Jan 2009

Lophorhothon., David R. Schwimmer

Faculty Bibliography

No abstract provided.

Go to article

Solution Of Problem 878, Eugen J. Ionascu Jan 2009

Solution Of Problem 878, Eugen J. Ionascu

Faculty Bibliography

No abstract provided.

Go to article

Teaching In Ill-Defined Domains Using Its And Ai Appraoches, Rania Hodhod Jan 2009

Teaching In Ill-Defined Domains Using Its And Ai Appraoches, Rania Hodhod

Faculty Bibliography

Ill-defined domains offer many challenges to computer scientists. Developing intelligent tutoring systems (ITSs) in these domains is a very challenging task due to the difficulty in modeling these domains, answers to ill-defined problems are ambiguously identified as right or wrong, and no generally accepted architecture is currently existed. This paper presents general guidelines for the development of ITSs in ill-defined domains, such as Argumentation and Ethics. This is instantiated in the two example systems AEINS and ALES. These systems offer adaptive learning processes and personalized feedback aiming to transfer the required skills to the learners and develop their reasoning.

Go to article

Nebraska Cooperative Fish And Wildlife Research Unit—Usgs: Report Of Activities October 2008 – October 2009 Jan 2009

Nebraska Cooperative Fish And Wildlife Research Unit—Usgs: Report Of Activities October 2008 – October 2009

Nebraska Cooperative Fish and Wildlife Research Unit: Annual Reports

CONTENTS
INTRODUCTION .. 1
PERSONNEL AND COOPERATORS . 2
Unit Personnel .. 2
Coordinating Committee Members . 4
Cooperators .. 5
MILESTONES .. 7
AWARDS AND RECOGNITIONS .. 8
THESES AND DISERTATIONS .. 8
PROJECTS IN FISHERY SCIENCE . 9
Angler Behavior in Response to Management Actions on Nebraska Reservoirs . 10
Geographic Trends in Contamination of Nebraska’s Surface Waters as Indexed by Sex Steroids of Common Carp .. 11
Impact of White Perch on Walleye at Branched Oak and Pawnee Reservoirs . 12
Latitudinal Influence on Age Estimation of Bluegill . 13
Predators of White Perch at Branched Oak …

Go to article

Heterogeneous Conductorlike Solvation Model, Hui Li, Dejun Si Jan 2009

Heterogeneous Conductorlike Solvation Model, Hui Li, Dejun Si

Chemistry Department: Faculty Publications

A heterogeneous conductorlike solvation model (conductorlike screening model/conductorlike polarizable continuum model) that uses different local effective dielectrics for different portions of the solute cavity surface is implemented for quantum chemical Hartree–Fock and Kohn–Sham methods. A variational treatment is used to form the heterogeneous solvation operator, so a simple analytic expression of the energy gradients, which are vital for geometry optimization and molecular dynamics simulation, is derived and implemented. Using the new Fixed Points with Variable Areas surface tessellation scheme, continuous and smooth potential energy surfaces as well as analytic gradients are obtained for this heterogeneous model.

Go to article

Structure Of Human Dna Polymerase Κ Inserting Datp Opposite An 8-Oxog Dna Lesion, Rodrigo Vasquez-Del Carpio, Timothy D. Silverstein, Samer Lone, Michael K. Swan, Jayati R. Choudhury, Robert E. Johnson, Satya Prakash, Louise Prakash, Aneel K. Aggarwal Jan 2009

Structure Of Human Dna Polymerase Κ Inserting Datp Opposite An 8-Oxog Dna Lesion, Rodrigo Vasquez-Del Carpio, Timothy D. Silverstein, Samer Lone, Michael K. Swan, Jayati R. Choudhury, Robert E. Johnson, Satya Prakash, Louise Prakash, Aneel K. Aggarwal

Chemical Sciences Faculty Publications

Background: Oxygen-free radicals formed during normal aerobic cellular metabolism attack bases in DNA and 7,8-dihydro-8-oxoguanine (8-oxoG) is one of the major lesions formed. It is amongst the most mutagenic lesions in cells because of its dual coding potential, wherein 8-oxoG(syn) can pair with an A in addition to normal base pairing of 8-oxoG(anti) with a C. Human DNA polymerase κ (Polκ) is a member of the newly discovered Y-family of DNA polymerases that possess the ability to replicate through DNA lesions. To understand the basis of Polκ's preference for insertion of an A opposite 8-oxoG lesion, …

Go to article

Galois Structure And De Rhan Invariants Of Elliptic Curves, Darren B. Glass, Sonin Kwon Jan 2009

Galois Structure And De Rhan Invariants Of Elliptic Curves, Darren B. Glass, Sonin Kwon

Math Faculty Publications

Let K be a number field with ring of integers OK. Suppose a finite group G acts numerically tamely on a regular scheme X over OK. One can then define a de Rham invariant class in the class group Cl(OK[G]), which is a refined Euler characteristic of the de Rham complex of X. Our results concern the classification of numerically tame actions and the de Rham invariant classes. We first describe how all Galois etale G-covers of a K-variety may be built up from finite Galois extensions of K and from geometric covers. When X is a curve of positive …

Go to article

Reliability Confidence Intervals For Oil Spills In The Gulf Of Mexico, William V. Harper, Thomas R. James, Ted G. Eschenbach Jan 2009

Reliability Confidence Intervals For Oil Spills In The Gulf Of Mexico, William V. Harper, Thomas R. James, Ted G. Eschenbach

Mathematics Faculty Scholarship

An extensive study [Eschenbach and Harper (2006)] of offshore oil spills in the Gulf of Mexico with extensions to the northern seas of Alaska involved the estimation of the likelihood of oil spill volumes in the Gulf of Mexico for both pipeline and platform spills. This paper develops both maximum likelihood based reliability and percentile confidence intervals for the 3- parameter Weibull distribution. The statistical aspects are discussed along with applications of developed Excel VBA functions. The Excel routines are available free on the web at http://faculty.otterbein.edu/WHarper/. The functions are illustrated with Gulf of Mexico oil spill data.

Go to article

Algebras Having Bases Consisting Entirely Of Units, Jeremy Moore Jan 2009

Algebras Having Bases Consisting Entirely Of Units, Jeremy Moore

Mathematics Faculty Scholarship

We introduce a hierarchy of notions about algebras having a basis B consisting entirely of units. Such a basis is called an invertible basis and algebras that have invertible bases are said to be invertible algebras...

Go to article

Identifying The Source Of Unknown Microcystin Genes And Predicting Microcystin Variants By Comparing Genes Within Uncultured Cyanobacterial Cells, C.J. Allender, G.R. Lecleir, J.M. Rinta-Kanto, R.L. Small, M.F. Satchwell, G.L. Boyer, Steven Wilhelm Jan 2009

Identifying The Source Of Unknown Microcystin Genes And Predicting Microcystin Variants By Comparing Genes Within Uncultured Cyanobacterial Cells, C.J. Allender, G.R. Lecleir, J.M. Rinta-Kanto, R.L. Small, M.F. Satchwell, G.L. Boyer, Steven Wilhelm

Microbiology Publications and Other Works

While multiple phylogenetic markers have been used in the culture independent study of microcystin producing cyanobacteria, in only a few instances have multiple markers been studied within individual cells, and in all cases these studies have been conducted with cultured isolates. Here, we isolate and evaluate large DNA fragments (> 6 kb) encompassing two genes involved in microcystin biosynthesis (mcyA2 and mcyB1) and use them to identify the source of gene fragments found in water samples. Further investigation of these gene loci from individual cyanobacterial cells allowed for improved analysis of the genetic diversity within microcystin producers as …

Go to article

Effects Of Increased Pco2 And Temperature On The North Atlantic Spring Bloom: Iii. Dimethylsulfoniopropionate, P.A. Lee, J.R. Rudisill, A.R. Neeley, D.A. Hutchins, Y. Feng, C.E. Hare, K. Leblanc, J.M. Rose, Steven Wilhelm, J.M. Rowe, G.R. Ditullio Jan 2009

Effects Of Increased Pco2 And Temperature On The North Atlantic Spring Bloom: Iii. Dimethylsulfoniopropionate, P.A. Lee, J.R. Rudisill, A.R. Neeley, D.A. Hutchins, Y. Feng, C.E. Hare, K. Leblanc, J.M. Rose, Steven Wilhelm, J.M. Rowe, G.R. Ditullio

Microbiology Publications and Other Works

The CLAW hypothesis argues that a negative feedback mechanism involving phytoplankton-derived dimethylsulfoniopropionate (DMSP) could mitigate increasing sea surface temperatures that result from global warming. DMSP is converted to the climatically active dimethylsulfide (DMS), which is transferred to the atmosphere and photochemically oxidized to sulfate aerosols, leading to increases in planetary albedo and cooling of the Earth’s atmosphere. A shipboard incubation experiment was conducted to investigate the effects of increased temperature and pCO2 on the algal community structure of the North Atlantic spring bloom and their subsequent impact on particulate and dissolved DMSP concentrations (DMSPp and DMSPd). Under …

Go to article

Recycling Tendencies Of Fordham University's Population, Jeremy Aiss, Vincent Ammirato, Anamarie Beluch, Christopher Torres Jan 2009

Recycling Tendencies Of Fordham University's Population, Jeremy Aiss, Vincent Ammirato, Anamarie Beluch, Christopher Torres

Student Theses 2001-2013

Our experiment aimed to find whether there was a correlation between the distance necessary to travel in order to recycle and the actual frequency of recycling. As a result, we hypothesized that recycling rate would be dependent upon the convenience to the recycler and consequently that the farther the distance between the garbage and recycling receptacle, the lower the likeliness of recycling. Between two buildings, the Walsh Library and the McGinley Center, we found that the total amount of recycling varied only slightly between these two buildings with Walsh having a 71.6% rate of recycling of all items, while McGinley …

Go to article

Environmental Health And Climate Change: The Case Of Lyme Disease, Matthew Abad Jan 2009

Environmental Health And Climate Change: The Case Of Lyme Disease, Matthew Abad

Student Theses 2001-2013

During the last couple of decades, global warming has been a topic of great investigation. The temperature of the Earth has been slowly raising and an increase in just a few degrees can have tragic consequences to this planet. One of the reasons for global warming is due to the effect of solar variation. The surface of the sun develops hot spots where more heat is generated and therefore results in an increase in the Earth’s temperature. The major reason for global warming is due to human activities. The human population greatly depends on coal for a source of fuel …

Go to article

The Business Of Sustainability, Andrea Brady Jan 2009

The Business Of Sustainability, Andrea Brady

Student Theses 2001-2013

-

Go to article

For The Birds!, Robert Patterson Jan 2009

For The Birds!, Robert Patterson

Student Theses 2001-2013

-

Go to article

Managing Infestation Of The Invasive Viburnum Leaf Beetle (Pyrrhalta Viburni) At The New York Botanical Garden, Gregory Russo Jan 2009

Managing Infestation Of The Invasive Viburnum Leaf Beetle (Pyrrhalta Viburni) At The New York Botanical Garden, Gregory Russo

Student Theses 2001-2013

-

Go to article

Environmental History Of Japan, Amy Seagroves Jan 2009

Environmental History Of Japan, Amy Seagroves

Student Theses 2001-2013

-

Go to article

Waste Mismanagement: Fighting Environmental Injustice In Mott Haven And Hunts Point, Elizabeth Friedrich Jan 2009

Waste Mismanagement: Fighting Environmental Injustice In Mott Haven And Hunts Point, Elizabeth Friedrich

Student Theses 2001-2013

-

Go to article

Using The Morse Potential To Understand Reaction Coördinates Using Maple, Carl W. David Jan 2009

Using The Morse Potential To Understand Reaction Coördinates Using Maple, Carl W. David

Chemistry Education Materials

The interactions employed in the “linear” reaction A(g)+BC(g) -> AB(g) + C(g) in a “one dimensional world” can be used to illustrate the “reaction coördinate”, using Maple, in a manner which allows students to inspect potential energy surfaces, make contour maps of those surfaces, and conceptually construct the “reaction coördinate” by tracing the local minimum path on the surface created.“one dimensional world” can be used to illustrate the “reaction coördinate”, using Maple, in a manner which allows students to inspect potential energy surfaces, make contour maps of those surfaces, and conceptually construct the “reaction coördinate” by tracing the local minimum …

Go to article

Frobenius Solution For Legendre's Equation, Rodrigue's Formula And Normalization, Carl W. David Jan 2009

Frobenius Solution For Legendre's Equation, Rodrigue's Formula And Normalization, Carl W. David

Chemistry Education Materials

The Frobenius solution to Legendre/s equation is developed in detail as is Rodrigue's formula, which is employed to normalize Legendre polynomials.

Go to article

1s_A 1s_B Overlap Integrals, Analytic And Maple Approches, Carl W. David Jan 2009

1s_A 1s_B Overlap Integrals, Analytic And Maple Approches, Carl W. David

Chemistry Education Materials

The calculation of overlap between adjacent orbitals (not on the same center) requires a slight facility with calculus which is quite instructive. That calculation is presented here.

Go to article

Rationale For Studying Physical Chemistry, Carl W. David Jan 2009

Rationale For Studying Physical Chemistry, Carl W. David

Chemistry Education Materials

The various rationales for studying physical chemistry, and specifically the theoretical component thereof are presented in what is hoped in a coherent package.

Go to article

The Harmonic Oscillator's Frobenius Solution, Carl W. David Jan 2009

The Harmonic Oscillator's Frobenius Solution, Carl W. David

Chemistry Education Materials

The Frobenius solution to the differential equations associated with the harmonic oscillator (QM) is carried out in detail.

Go to article

The Hartree-Fock Method Applied To Helium's Electrons, Carl W. David Jan 2009

The Hartree-Fock Method Applied To Helium's Electrons, Carl W. David

Chemistry Education Materials

The difficulties of applying the Hartree-Fock method to many body problems is illustrated by treating Helium's electrons up to the point where tractability vanishes. Second, the problem of applying Hartree-Fock methods to the helium atom's electrons, when they are constrained to remain on a sphere, is revisited. The 6-dimensional total energy operator is reduced to a 2-dimensional one, and the application of that 2-dimensional operator in the Hartree-Fock mode is discussed.

Go to article

Multiple-Choice Testing In Science And Technology Courses, Carl W. David Jan 2009

Multiple-Choice Testing In Science And Technology Courses, Carl W. David

Chemistry Education Materials

Wide spread and continuing use of multiple-choice testing in technical subjects is leading to a mindset amongst students which is antithetical with actual use of intellect.

Go to article

L'Hopital's Rule In Chemistry: Irreversible Morphing Into Reversible Isothermal Expansions, Carl W. David Jan 2009

L'Hopital's Rule In Chemistry: Irreversible Morphing Into Reversible Isothermal Expansions, Carl W. David

Chemistry Education Materials

L'Hopital's Rule is discussed in the cvase of an irreversible isothermal expansion.

Go to article

Mo Visualization Of Pi Orbitals, Carl W. David Jan 2009

Mo Visualization Of Pi Orbitals, Carl W. David

Chemistry Education Materials

In the spirit of trying to convert people to understanding atomic orbitals centered elsewhere than the origin, we continue the discussion of visualizing molecular orbitals, so called LCAO-MO, using various plotting tricks in Maple.

Go to article

A Review Of Helium Hamiltonians, Carl W. David Jan 2009

A Review Of Helium Hamiltonians, Carl W. David

Chemistry Education Materials

Helium Hamiltonian transformations are discussed in extreme detail.

Go to article

Lee O Case's "Elements Of The Phase Rule", Introduction And Explanation, Carl W. David Jan 2009

Lee O Case's "Elements Of The Phase Rule", Introduction And Explanation, Carl W. David

Chemistry Education Materials

This out of print 1939 manuscript, updated, is added to the literature with slight additions

Go to article

First Prev Next Last