Physical Sciences and Mathematics Commons^™

Unreplicated Spatial Designs Compared Using Optimality Criteria, Tisha Maas, David Marx, Dr. Jeff Pedersen

Conference on Applied Statistics in Agriculture

In field trials including large numbers of varieties, it is often impossible or impractical to replicate each variety. In these situations, the researcher may choose to use only one replicate of each test variety and to include a "check" variety every so often so that the spatial variability of the field may be determined. Five different check patterns were purposefully designed, each possessing distinct characteristics. The purpose of this study is to determine which spatial patterns for the check variety are better able to identify the spatial structure in a field and to rank the experimental varieties accurately. The problem …

Row-Colunin Designs At Pioneer Hi-Bred, Kevin Wright

Conference on Applied Statistics in Agriculture

Pioneer Hi-Bred annually tests more than one hundred thousand new varieties of corn hybrids. Experimental designs used for these tests include CRD, RCB, nested and split-plot. A Six Sigma project at Pioneer recommended testing the use of incomplete-block (IB) designs. In 2001 some experiments were structured as row-column IE designs. This talk will discuss the experience of implementing and analyzing the row-column designs, summaries of the results, and plans for future experiments.

The Information-Theoretic Approach To Model Selection: Description And Case Study, Erin E. Blankenshipa, Micah W. Perkinsb, Ron J. Johnsonc

Conference on Applied Statistics in Agriculture

In the wildlife literature there has been some recent criticism of statistical significance testing. In the past few years, both the Journal of ·Wildlife Management and the Wildlife Society Bulletin have published articles criticizing the overuse and misuse of hypothesis tests. One alternative to using hypothesis tests for model selection is the information-theoretic approach, proposed by Burnham and Anderson (1998). This technique uses values such as the Akaike Information Criterion and others to choose a set of plausible models from a set of a prioTi candidate models. Inferences are based on the set of plausible models, rather than on a …

Estimating Intraclass Correlation: Optimal Results Using Limited Resources, Brent D. Burch, Ian R. Harris

Conference on Applied Statistics in Agriculture

From plant and animal breeding studies to industrial applications, the intraclass correlation coefficient (p) is used to measure the proportion of the total variation in the responses that may be attributed to a particular source. Confidence intervals for p are used to determine the optimal allocation of experimental material in one-way random effects models. Assuming the sample size is fixed, the authors investigate the number of groups and the number of observations per group required to minimize the expected length of confidence intervals. Examples are used to illustrate the selection of the best design. Both asymptotic and exact results suggest …

Impact Of Variance Component Estimates On Fixed Effect Inference In Unbalanced Linear Mixed Models, Walt Stroup, Ramon Littell

Conference on Applied Statistics in Agriculture

Inference on fixed effects in mixed models depends on standard errors or test statistics which in turn depend on estimates of variance and covariance components. For unbalanced mixed models, even relatively simple models such as two-way cross-classification models with interaction where one factor is fixed and the other is random, dilemmas arise that have received inadequate attention to date. For example, if one uses SAS PROC MIXED, one can estimate variance components using expected means squares from Type I, II, or III sums of squares, or one can use likelihood-based algorithms such as the default restricted maximum likelihood. If there …

Model Selection Techniques For Repeated Measures Covariance Structures, E. Barry Moser, Raul E. Macchiavelli

Conference on Applied Statistics in Agriculture

A parsimonious covariance structure of repeated measures is often sought for purposes of increased power for testing hypotheses about the means, and for insight into the stochastic processes governing the repeated measures. For normal data, model selection is often based upon likelihood ratio tests or information criteria derived from the likelihood, sometimes supplemented with graphical plots of correlations and partial correlations. We exploit the ordered nature of repeated measures to decompose the likelihood ratio goodness-of-fit test statistic, and display graphical fingerprints associated with the covariance structures to help detect covariance structure misspecification, in order to provide guidance in choosing an …

The Completely Sufficient Statistician (Css), Ralph G. O'Brien

Conference on Applied Statistics in Agriculture

Today's ideal statistical scientist develops and maintains a broad range of technical skills and personal qualities in four domains: (1) numeracy, in mathematics and numerical computing; (2) articulacy and people skills; (3) literacy, in technical writing and in programm,ing; and (4) graphicacy. Yet, many of these components are given short shrift in university statistics programs. Can even the best statistician today really be "completely sufficient?"

Editor's Preface And Table Of Contents, George A. Milliken

Conference on Applied Statistics in Agriculture

These proceedings contain papers presented in the fourteenth annual Kansas State University Conference on Applied Statistics in Agriculture, held in Manhattan, Kansas, April 28-30, 2002.

Siple Dome Deep Ice Core Glaciochemistry And Regional Survey - A Contribution To The Wais Initiative, Paul Andrew Mayewski, Loren D. Meeker

University of Maine Office of Research Administration: Grant Reports

Our project focuses on the analysis and interpretation of major ions and methanesulfonate (in conjunction with the Univ. of Miami) from a deep ice core at Siple Dome, Antarctica. In addition, this study investigates the regional glaciochemical variability on Siple Dome, continuing work begun during the 1994 field season. The first field season for this project was conducted during the 1996/97 austral season. Because this project closely follows work begun in 1994, selected glaciochemical results from 1994 are presented, along with reports that detail Siple Dome research to present.

Essays In Indian Corporate Finance., K. V. S. Vinay Dr.

Doctoral Theses

This thesis comprises of three essays in corporate finance focusing on the Indian economy. The first essay contains a theoretical model while the second and the third essays are empirical exercises. In the subsequent paragraphs of this section, we examine the broader issues to which the contents of the thesis contribute.The past few years have seen rising interest in studies of financial insti- tutions and corporate financial policies in countries other than the United States. One of the reasons for such a shift in attention is the diversity in the size and structure of financial arrangements all over the world. …

Design Of Redundant Fir Precoders For Arbitrary Channel Lengths Based On An Mmse Criterion, Alfred Mertins

Faculty of Informatics - Papers (Archive)

The joint design of transmitter and receiver for multichannel data transmission over dispersive channels is considered. In particular, the practically important case where the transmitter consists of FIR filters and the channel impulse response has arbitrary length is addressed. The design criterion is the minimization of the mean squared error at the receiver output under the constraint of a fixed transmit power. The proposed algorithm allows a straightforward transmitter design and yields (in general) a near-optimal solution for the transmit filters. Under certain conditions, the exact solution for the optimal transmitter is obtained.

Ua66/1/1 Student Awards Ceremony, Wku Ogden College Of Science & Engineering

WKU Archives Records

Program for Ogden College of Science & Engineering Student Awards ceremony.

Projectile And Target Ionization In Mev U⁻¹ Collisions Of Xe Ions With N2, Ronald E. Olson, R. L. Watson, V. Horvat, K. E. Zaharakis

Physics Faculty Research & Creative Works

Experimental cross sections are presented for single and multiple electron stripping from Xe¹⁸⁺ projectiles in collisions with N₂ at energies 2.0-9.3 MeV u^-1. The data are compared to 2-30 MeV u^-1 n-body classical trajectory Monte Carlo calculations that explicitly include electrons on both centres. Two-centre electron-electron (e-e) and electron-screened nuclear interactions contribute to the ionization reactions. The computations are in reasonable accord for the total stripping cross section but underestimate the higher stages of multiple electron loss. An energy deposition model gives improved agreement with experiment. The energy dependence of the total stripping cross section …

Monitoring Relative Abundance Of American Shad In Virginia’S Rivers 2001 Annual Report, John E. Olney, Kristin L. Maki

Reports

Concern about the decline in landings of American shad (Alosa sapidissima) along the Atlantic coast prompted the development of an interstate fisheries management plan (FMP) under the auspices of the Atlantic States Marine Fisheries Management Program (ASMFC 1999). Legislation enables imposition of federal sanctions on fishing in those states that fail to comply with the FMP. To be in compliance, coastal states are required to implement and maintain fishery-dependent and fishery-independent monitoring programs as specified by the FMP. For Virginia, these requirements include spawning stock assessments, the collection of biological data on the spawning run (e.g., age-structure, sex ratio, spawning …

Multiscalar, Multisensor Search And Survey With Hovering Auvs, Christopher Roman, Hanumant Singh

Christopher N. Roman

No abstract provided.

Aerosol Optical Depth At Cape Grim, Tasmania 1986-1999, Stephen R. Wilson, B. W. Forgan

Faculty of Science - Papers (Archive)

The aerosol optical depth at 4 wavelengths (368, 500, 778 and 868nm) has been measured automatically at Cape Grim since 1986. The site, on the northwest tip of Tasmania, Australia was chosen to be representative of much of the southern ocean. Fourteen years of measurement have been calibrated and analyzed. The data have been filtered so that only measurements made under on-shore wind conditions are considered. The major feature observed in the record is the eruption of Mt Pinatubo, which resulted in the aerosol optical depth at 500 nm rising to 0.2 – 0.3. If the period of high stratospheric …

Coherent Vs Incoherent Interlayer Transport In Layered Metals, Gary L. Gard, J. Wosnitza, J. Hagel, J. S. Qualls, J. S. Brooks, E. Balthes, D. Schweitzer, J. A. Schlueter, U. Geiser, Javid Mohtasham, Rolf Walter Winter

Chemistry Faculty Publications and Presentations

The magnetic-field, temperature, and angular dependence of the interlayer magnetoresistance of two different quasi-two-dimensional (2D) organic superconductors is reported. For k -BEDT-TTF)₂I₃, where BEDTTTF is bisethylenedithio-tetrathiafulvalene, we find a well-resolved peak in the angle-dependent magnetoresistance at Q590°(field parallel to the layers). This clear-cut proof for the coherent nature of the interlayer transport is absent for β″–(BEDT-TTF)₂SF₅CH₂CF₂SO₃. This and the nonmetallic behavior of the magnetoresistance suggest an incoherent quasiparticle motion for the latter 2D metal.

Ordinance To Provide Inspection And Maintenance Of On-Site Sewage Disposal Systems And On-Site Water Supply Systems, Annis Water Resources Institute

Environmental Guidebooks and Model Ordinances

Ordinance to Provide Inspection and Maintenance of On-Site Sewage Disposal Systems and On-Site Water Supply Systems

Γ Production And Polarization In Pp̅ Collisions At √S= 1.8 Tev, Darin Acosta, Kenneth A. Bloom, Collider Detector At Fermilab Collaboration

Kenneth Bloom Publications

We report on measurements of the ϒ(1S), ϒ(2S), and ϒ(3S) differential cross sections (d²σ/dp_Tdy)|y|pp̅ collisions at √s = 1.8 TeV using a sample of 77±3 pb^-1 collected by the collider detector at Fermilab. The three resonances were reconstructed through the decay ϒ→μ⁺μ^-. The measured angular distribution of the muons in the ϒ(1S) rest frame is consistent with unpolarized meson production.

Charged Jet Evolution And The Underlying Event In Proton-Antiproton Collisions At 1.8 Tev, T. Affolder, Kenneth A. Bloom, Collider Detector At Fermilab Collaboration

Kenneth Bloom Publications

The growth and development of ‘‘charged particle jets’’ produced in proton-antiproton collisions at 1.8 TeV are studied over a transverse momentum range from 0.5 GeV/c to 50 GeV/c. A variety of leading (highest transverse momentum) charged jet observables are compared with the QCD Monte Carlo models HERWIG, ISAJET, and PYTHIA. The models describe fairly well the multiplicity distribution of charged particles within the leading charged jet, the size of the leading charged jet, the radial distribution of charged particles and transverse momentum around the leading charged jet direction, and the momentum distribution of charged particles within the …

Measurement Of The Photon-Proton Total Cross Section At A Center-Of-Mass Energy Of 209 Gev At Hera, S. Chekanov, M. Derrick, D. Krakauer, S. Magill, B. Musgrave, A. Pellegrino, J. Repond, R. Yoshida, Margarita C. K. Mattingly, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, G. Sartorelli

Faculty Publications

The photon-proton total cross section has been measured in the process e+ p → e+ γp → e+ X with the ZEUS detector at HERA. Events were collected with photon virtuality Q2 < 0.02 GeV2 and average γp center-of-mass energy Wγp = 209 GeV in a dedicated run, designed to control systematic effects, with an integrated luminosity of 49 nb-1. The measured total cross section is σtotγp = 174 ± 1 (stat.) ± 13 (syst.) μb. The energy dependence of the cross section is compatible with parameterizations of high-energy pp and pap data. © 2002 Elsevier Science B.V. All rights reserved.

The Annual Meeting Of The Iowa Academy Of Science April 19-20, 2002 [Program, 114th Meeting], Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Program Summary --- 1
General Session Speakers --- 4
Awards --- 7
Symposia Programs --- 8
Special Events --- 8
Poster Sessions --- 9
Section Programs/Special Sessions --- 9
Agricultural Sciences --- 9
Anthropology --- 10, 16
Bioterrorism Symposia --- 24
Botany --- 11
Cellular, Molecular & Microbiology --- 17
Chemical Education --- 24
Chemistry: Inorganic, Analytical & Physical --- 18
Chemistry: Organic & Biological --- 18
College Science Teaching --- 11, 19
Community College Biologists --- 20
Conservation --- 20
Earth Science Teaching --- 24
Elementary Science Teaching --- 24
Engineering --- 12
Environmental Science and Health --- …

Program Abstracts, 114th Session, Iowa Academy Of Science, April 19-20, 2002, Iowa Academy Of Science

Iowa Academy of Science Documents

Presentation abstracts from the annual meeting of the Iowa Academy of Science

The Fission Properties Of Curium Separated From Spent Nuclear Fuel, William Culbreth, Elizabeth Bakker, Jason Viggato

Separations Campaign (TRP)

Curium poses special problems in the chemical preparation of spent nuclear fuel for transmutation. Once separated from the other minor actinides, the seven curium isotopes in spent fuel can lead to nuclear fission with the subsequent release of a large amount of radiation. Several isotopes of curium also generate a significant amount of heat by radioactive decay. Sustained fission can be avoided by preventing the accumulation by more that a critical mass of curium. The heat generation of curium presents even more restriction on the mass of curium that can safely be contained in one location.

To analyze the nuclear …

114th Session Iowa Academy Of Science Awards Luncheon, April 19, 2002, Iowa Academy Of Science

Iowa Academy of Science Documents

Program:

--- Introductions - Raymond Anderson, President
--- Recognition of students participating in various statewide activities - Ernie Schiller, Chair, Student Programs Committee
--- Presentation of scholarship winners and 2003 AJAS representatives - Ernie Schiller, Chair, Student Programs Committee
--- Presentation of Excellence in Science Teaching Awards - Jeff Weld, Director, ESTA Program

Iowa Academy Of Science President's Banquet, 114th Session, Iowa Academy Of Science

Iowa Academy of Science Documents

Banquet Program:

Awards - Distinguished Iowa Science Teaching: Dr. Gary Atchison
Awards - Distinguished Service Award: Dr. David V. McCalley
President's Address: Dr. Lynn Brant
Response: Dr. Ray Anderson, President-Elect
General Session II: Dr. Sue Savage-Rumbaugh, "Ape Communication: On the Boundaries of Science and the Borders of Scientific Critique"

Dna Polymerase Iii Holoenzyme From Thermus Thermophilus Identification Expression Purification Of Components And Use To Reconstitute A Processive Replicase, James M. Bullard, Jennifer C. Williams, Wendy K. Acker, Carsten Jacobi, Nebojsa Janjic, Charles S. Mchenry

Chemistry Faculty Publications and Presentations

DNA replication in bacteria is performed by a specialized multicomponent replicase, the DNA polymerase III holoenzyme, that consist of three essential components: a polymerase, the β sliding clamp processivity factor, and the DnaX complex clamp-loader. We report here the assembly of the minimal functional holoenzyme from Thermus thermophilus (Tth), an extreme thermophile. The minimal holoenzyme consists of α (pol III catalytic subunit), β (sliding clamp processivity factor), and the essential DnaX (τ/γ), δ and δ′ components of the DnaX complex. We show with purified recombinant proteins that these five components are required for rapid and processive DNA synthesis …

Molecular Dynamics Simulation Of Sodium Dodecyl Sulfate Micelle In Water: Micellar Structural Characteristics And Counterion Distribution, Chrystal Bruce, Max Berkowitz, Lalith Perera, Malcolm Forbes

Chrystal D. Bruce

An all-atom 5 nanosecond molecular dynamics simulation of a water-solvated micelle containing 60 sodium dodecyl sulfate monomers was performed. Structural properties such as the radius of gyration, eccentricity, micellar size, accessible surface area, dihedral angle distribution, carbon atom distribution, and the orientation of the monomers toward the micelle center of mass were evaluated. The results indicate a stable micellar system over the duration of the simulation. Evaluation of the structure and motion of the sodium counterions show (1) a long equilibration time (1 nanosecond) is required to achieve a stable distribution of counterions and (2) approximately 25% of the sodium …

Chiral Discrimination In Cyclodextrin Complexes Of Amino Acid Derivatives: Β-Cyclodextrin/N-Acetyl-L-Phenylalanine And N-Acetyl-D Phenylalanine Complexes, Jennifer M. Alexander, Joanna L. Clark, Tom J. Brett, John J. Stezowski

John J. Stezowski Publications

In a systematic study of molecular recognition of amino acid derivatives in solid-state β-cyclodextrin (β-CD) complexes, we have determined crystal structures for complexes of β-cyclodextrin/N -acetyl-L-phenylalanine at 298 and 20 K and for N-acetyl-D-phenylalanine at 298 K. The crystal structures for the N-acetyl-L-phenylalanine complex present disordered inclusion complexes for which the distribution of guest molecules at room temperature is not resolvable; however, they can be located with considerable confidence at low temperature. In contrast, the complex with N-acetyl-D-phenylalanine is well ordered at room temperature. The latter complex presents an example of a complex in this series …

Multielectron System In An Ultrashort, Intense Laser Field: A Nonperturbative, Time-Dependent Two-Active-Electron Approach, G. Lagmago Kamta, Anthony F. Starace

Department of Physics and Astronomy: Faculty Publications

We present a two-active-electron (TAE) approach for solving the time-dependent Schrödinger equation (TDSE) for the interaction of a multi-electron system with an ultrashort, intense, and linearly polarized laser pulse [Lagmago Kamta and Starace, Phys. Rev. Lett. 86, 5687 (2001)]. A technique for obtaining angular distributions for double ionization by such pulses is also described. The approach for solving the TDSE in the TAE approximation is full dimensional and accounts for correlations between the two electrons, as well as the polarization of the core. It is based on a configuration-interaction expansion of the time-dependent wave function in terms of one-electron …