Digital Commons Network^™

Majority Rule Or Minority Will: Adherence To Precedent On The Us Supreme Court By Harold J. Spaeth And Jeffrey A. Segal, Donald R. Songer

Faculty Publications

No abstract provided.

Nutrient Cycling In The Water Column Of A Subtropical Seagrass Meadow, Susan Ziegler, Ronald Benner

Faculty Publications

The cycling of nutrients was studied over a 16 mo period to determine how processes occurring between the water column and benthos influenced nutrient dynamics in a Thalassia testudinum dominated seagrass meadow. Nutrient concentrations were low and ranged from below detection to 0.59 µM ammonium (NH₄⁺), 0.04 to 0.29 µM nitrate plus nitrite (NO₃^- + NO₂^-), and below detection to 0.22 µM soluble reactive phosphate (SRP). Water column and benthic fluxes of NO₃^- + NO₂^- and SRP were usually below detection. The benthic fluxes of NH₄^{+ …}

Intersecting Chains In Finite Vector Spaces, Eva Czabarka

Faculty Publications

We prove an Erdős–Ko–Rado-type theorem for intersecting k-chains of subspaces of a finite vector space. This is the q-generalization of earlier results of Erdős, Seress and Székely for intersecting k-chains of subsets of an underlying set. The proof hinges on the author's proper generalization of the shift technique from extremal set theory to finite vector spaces, which uses a linear map to define the generalized shift operation. The theorem is the following.

For c = 0, 1, consider k-chains of subspaces of an n-dimensional vector space over GF(q), such that the smallest subspace in any chain has dimension at least …

Validity Of The Previous Day Physical Activity Recall (Pdpar) In Fifth-Grade Children, Stewart G. Trost, Dianne S. Ward, Ben Mcgraw, Russell R. Pate

Faculty Publications

This study evaluated the validity of the Previous Day Physical Activity Recall (PDPAR) self-report instrument in quantifying after-school physical activity behavior in fifth-grade children. Thirty-eight fifth-grade students (mean age, 10.8 ± 0.1; 52.6%; female; 26.3% African American) from two urban elementary schools completed the PDPAR after wearing a CSA WAM 7164 accelerometer for a day. The mean within-subject correlation between self-reported MET level and total counts for each 30-min block was 0.57 (95% C.I., 0.51-0.62). Self-reported mean MET level during the after-school period and the number of 30-min blocks with activity rated at > 6 METs were significantly correlated with the …

Low-Frequency Noise In N-Gan With High Electron Mobility, M. E. Levinshtein, S. L. Rumyantsev, D. C. Look, R. J. Molnar, M. Asif Khan, Grigory Simin, V. Adivarahan, M. S. Shur

Faculty Publications

We report on the results of measurements of low frequency noise in n-type gallium nitride (GaN) grown on sapphire with 300 K electron mobility of 790 cm²/V s. The noise spectra have the form of 1/f noise with a Hooge parameter α of approximately 5×10⁻². This value of α is two orders of magnitude smaller than that observed before in n-GaN. The obtained results show that the level of flicker noise in GaN, just like that in GaAs and Si, strongly depends on the structural perfection of the material (the amplitude of the 1/f …

Piezoelectric Doping In Alingan/Gan Heterostructures, M. Asif Khan, J. W. Yang, Grigory Simin, R. Gaska, M. S. Shur, A. D. Bykovski

Faculty Publications

We report on the piezoelectricdoping and two-dimensional (2D) electron mobility in AlInGaN/GaN heterostructures grown on 6H–SiC substrates. The contribution of piezoelectricdoping to the sheet electron density was determined using an In-controlled built-in strain-modulation technique. Our results demonstrate that in strained AlGaN/GaN heterostructures, the piezoelectric field generates at least 50% of the 2D electrons. The strain modulation changes the potential distribution at the heterointerface, which, in turn, strongly affects the 2D electron mobility, especially at cryogenic temperatures. The obtained results demonstrate the potential of strain engineering and piezoelectricdoping for GaN-based electronics.

Tracking Of Physical Activity, Physical Inactivity, And Health-Related Physical Fitness In Rural Youth, Russell R. Pate, Stewart G. Trost, Marsha Dowda, Alise E. Ott, Dianne S. Ward, Ruth P. Saunders, Gwen A. Felton

Faculty Publications

This study examined the tracking of selected measures of physical activity, inactivity, and fitness in a cohort of rural youth. Students (N=181, 54.7% female, 63.5% African American) completed test batteries during their fifth- (age=10.7±0.7 years), sixth-, and seventh-grade years. The Previous Day Physical Activity Recall (PDPAR) was used to assess 30-min blocks of vigorous physical activity (VPA), moderate-to-vigorous physical activity (MVPA), TV watching and other sedentary activities, and estimated energy expenditure (EE). Fitness measures included the PWC 170 cycle ergometer test, strength tests, triceps skinfold thickness, and BMI. Intraclass correlation coefficients (ICCs) for VPA, MVPA, and after-school EE …

Extended Stratification: Immigrant And Native Differences In Individual And Family Labor., Pidi Zhang, Jimy M. Sanders

Faculty Publications

The article outlines a theoretical system of extended stratification in order to account for differences between immigrants and natives in the amount of time individuals devote to paid work and the number of family members participating in paid work. The extended stratification theory contends that because people have different socio-economic frames of reference, they vary in their willingness to work long hours in an effort to achieve modest improvements in their current socioeconomic circumstances. Thus, immigrants from relatively poor societies tend to see their richer host society as abundant in opportunities for getting ahead through hard work. Immigrants will often …

The Premature Belatedness Of Victorianism's Boyhood: Clough And The Rugby Magazine, 1835-1837, Patrick G. Scott

Faculty Publications

Explores the attitudes and pressures on early Victorian teenagers through an examination of contributions by the poet Arthur Hugh Clough and other students at Rugby School to a short-lived quarterly, the Rugby Magazine (1835-1837). Originally presented at the Victorians Institute conference, Richmond, VA, 1999.

Manufacturing Ideology: Scientific Management In Twentieth-Century Japan, By William M. Tsutsui, William Dean Kinzley

Faculty Publications

A review of Manufacturing Ideology: Scientific Management in Twentieth-Century Japan, by William M. Tsutsui

Toward The Development Of A Pursuit Decision Calculus: Pursuit Benefits Versus Pursuit Cost, Thomas J. Madden, Geoffrey P. Alpert

Faculty Publications

To make unbiased decisions about whether to pursue a fleeing vehicle, officers must understand both the costs and the potential benefits of a pursuit. This manuscript describes an approach that identifies and assesses the impact of pursuit characteristics on pursuit costs. Data from official pursuit forms generated by officers in the Miami-Dade police department were used as a basis of the study. Log-linear models were used to identify direct and interactive effects of the pursuit characteristics. Upon finding significant effects, odds ratios were calculated. The findings indicate that there are certain pursuit characteristics, including number of units and speed, that …

Fish Kills And Bottom-Water Hypoxia In The Neuse River And Estuary: Reply To Burkholder Et Al., Hans W. Paerl, James L. Pinckney, John M. Fear, Benjamin L. Peierls

Faculty Publications

No abstract provided.

An Ellam Scheme For Advection-Diffusion Equations In Two Dimensions, Hong Wang, Helge K. Dahle, Richard E. Ewing, Magne S. Espedal, Robert Sharpley, Shushuang Man

Faculty Publications

We develop an Eulerian--Lagrangian localized adjoint method (ELLAM) to solve two-dimensional advection-diffusion equations with all combinations of inflow and outflow Dirichlet, Neumann, and flux boundary conditions. The ELLAM formalism provides a systematic framework for implementation of general boundary conditions, leading to mass-conservative numerical schemes. The computational advantages of the ELLAM approximation have been demonstrated for a number of one-dimensional transport systems; practical implementations of ELLAM schemes in multiple spatial dimensions that require careful algorithm development are discussed in detail in this paper. Extensive numerical results are presented to compare the ELLAM scheme with many widely used numerical methods and to …

Die Altenglischen Glossen Zu Aldhelms "De Laudibus Virginitatis" In Der Handschrift Bl, Royal 6 B. Vii., Scott Gwara

Faculty Publications

No abstract provided.

Review Of The Book "New Ways Of Learning And Teaching: Focus On Technology And Foreign Language Education", Travis Bradley, Lara Lomicka

Faculty Publications

No abstract provided.

Dietary Assimilation Of Cadmium Associated With Bacterial Exopolymer Sediment Coatings By The Estuarine Amphipod Leptocheirus Plumulosus: Effects Of Cd Concentration And Salinity, Christian E. Schlekat, Alan W. Decho, G. Thomas Chandler

Faculty Publications

Bacterial extracellular substances (also known as exopolysaccharides, or EPS) may serve as vectors for trophic transfer of metals in benthic systems because these ubiquitous sediment coatings can sorb high concentrations of toxic metals, and because many benthic invertebrates assimilate EPS sediment coatings upon ingestion. We conducted 3 sets of experiments to determine the assimilative bioavailability of EPS-associated Cd to the benthic amphipod Leptocheirus plumulosus as a function of Cd concentration and salinity. Bioavailability was measured as L. plumulosus Cd assimilation efficiency (AE) from EPS-coated silica (EPS●Si) and from uncoated silica (NC●Si) using modified pulse-chase methods with the gamma-emitting radioisotope ^{109 …}

Film Formation By Marine Bacteria At A Model Fluid Interface, Vera Zutic, Nadica Ivosevic, Vesna Svetlicic, Richard A. Long, Farooq Azam

Faculty Publications

We have characterized the nonspecific interactions in the initial attachment and film formation by marine bacteria at a dynamic fluid interface: seawater/dropping mercury electrode. Experimental evidence is presented that bacteria readily establish molecular contact with the metal substrate without mediation of a conditioning film. Prevalence of hydrophobic over electrostatic interactions and the possible importance of Ca²⁺ bridging could be inferred. The attachment of individual bacterial cells is faster than their transport from the aqueous medium, as is the case in the transport-controlled adsorption of biopolymers. The cell aggregates yield distinct electrical attachment signals, allowing a comparison between cell-cell and …

Dynamics Of Formation Of Soliton Conductivity In A 2 D-Array Of Linear Chains Containing Commensurate Charge Density Waves Near The Contact With A Normal Metal, Yuriy V. Pershin Dr, Alexander S. Rozhavsky

Faculty Publications

We make a numerical study of the conversion of conduction electrons into charge density wave (CDW) topological solitons at the interface between a normal metal and a 2D-array of the CDW-carrying linear chains. The interplay of commensurability potential, interchain interaction, and electric field on the dynamics of soliton formation is studied. When the interchain interaction exceeds the commensurability energy, the dynamic mechanism of creation of fractionally charged solitons near the contact is suppressed and specific contact nonlinearity in transport current is not observed.

Oxygen Permeation Through Composite Oxide-Ion And Electronic Conductors, Kevin Huang, Michael Schroeder, John B. Goodenough

Faculty Publications

Oxygen permeation through composites consisting of four well-known oxide-ion conductors and a noble metal, Pd or Ag, is reported. The oxides were Zr_0.9Y_0.1O_1.95 (YSZ), (Bi_1.75Y_0.25O₃)_0.95(CeO₂)_0.05 (BYC5), Ce_0.8Sm_0.2O_1.9 (SSC), and La_0.8Sr_0.2Ga_0.83Mg_0.17O_2.815 (LSGM). The results show that (BYC5 + Ag) yields the highest oxygen permeation flux, but the composite deteriorates with time. The composites (SSC + Pd), (LSGM + Pd), and (YSZ + Pd) give stable, but relatively lower oxygen permeation flux …

Dissolved Organic Carbon Cycling In A Subtropical Seagrass-Dominated Lagoon, Susan Ziegler, Ronald Benner

Faculty Publications

The cycling of dissolved organic matter (DOM) and its significance to ecosystem metabolism was studled over a 16 mo period in a Thalassia testudjnum dominated meadow. The benthos was usually net autotrophic (annual gross primary production to respiration ratio [P:R] = 1.3) while water column respiration (R) exceeded gross primary production (annual P:R = 0.3). Net fluxes of dissolved organic carbon (DOC) from the benthos primarily occurred in the light (0 to 18 mmol C m^-2 d^-1) and from seagrass-dominated areas, suggesting that release of DOC was mainly due to seagrass exudation. Net benthic DOC fluxes measured …

The Religious Right In Court: The Decision Making Of Christian Evangelicals In State Supreme Courts, Donald R. Songer, Susan J. Tabrizi

Faculty Publications

Much has been written recently about the emergence of evangelicals and others often labeled the "new Religious Right" in American politics. However, little attention has been paid to whether officials who have been socialized in the denominations characterized as being part of this Religious Right actually behave differently in office from those brought up in other religious traditions. The present study begins such an inquiry by examining differences in the voting behavior of state supreme court justices in three issue areas. Evangelical justices were found to be significantly more conservative than mainline Protestant, Catholic, and Jewish justices in death penalty, …

Online Auctions, Michael N. Huhns, José M. Vidal

Faculty Publications

Auctions on the Internet can involve not only consumers, but also businesses. They can form dynamically and enable the exchange of goods much as stock exchanges manage the buying and selling of securities. But because auctions have a wide scope and a short lifetime, the opportunistic behavior needed for successful interaction requires agents to both participate in and manage auctions. The article focuses on the use of software agents in such Internet based auctions

Coupling Between Bacterioplankton Species Composition, Population Dynamics, And Organic Matter Degradation, Jarone Pinhassi, Farooq Azam, Johanna Hemphälä, Richard A. Long, Josefina Martinez, Ulla Li Zweifel, Åke Hagström

Faculty Publications

To study the effect of substrate addition on short term bacterial population dynamics and species composition in seawater mesocosms were maintained with water collected off Scripps Pier (La Jolla, California USA) Protein enrichment (BSA) triggered a dynamic response from the microbial food web, whereas enrichment with starch had no effect. In the protein enriched mesocosm the number of both nucleoid-containing cells and metabolically active cells increased by 3.0 X 10⁵ cells ml^-1 from Day 1 to Day 4 In the same time period the density of a set of 31 phylogenetically different bacteria (α- and g-Proteobactena as well …

The Value Of Open Market Repurchases Of Closed-End Fund Shares, Gary E. Porter, Rodney L. Roenfeldt, Neil W. Sicherman

Faculty Publications

The authors illustrate the value to shareholders when closed-end funds repurchase shares at a discount from net asset value. Repurchases increase share price even when there is no asymmetric information concerning the value of the underlying assets and the percentage discount remains unchanged following the repurchase. Expected gains to shareholders are derived from capturing the discount on the assets associated with the shares repurchased. In an analysis of 27 open market repurchase announcements by closed-end funds, the regression coefficient estimate that measures the association between the actual excess return and the expected increase in share price is essentially 1.0.

Digital Image Managers For The New Millennium: A Museum/University Collaboration, Samantha K. Hastings, Museums And The Web 1999

Faculty Publications

The University of North Texas and the African American Museum in Dallas are partners in a program designed to produce expert managers of digital images and information. The School of Library and Information Sciences in cooperation with the School of Visual Arts received a grant from the federal Institute of Museum and Library services to build a collaborative program that includes a digital imaging laboratory and fellowships for students in a Certificate of Advanced Study Program. The work of the digital image manager includes the production of visual images, the creation and management of databases and the ability to use …

Cumulative Reaction Probability In Terms Of Reactant-Product Wave Packet Correlation Functions, Sophya Garashchuk, David J. Tannor

Faculty Publications

Presents expressions for the cumulative reaction probability (N(E)), cast in terms of time-correlation functions of reactant and product wave packets. Beginning of the derivation with a standard trace expression for the cumulative reaction probability; Expression for N(E) obtained in terms of the correlation matrices of incoming and outgoing wave packets.

Law And Politics In Judicial Oversight Of Federal Administrative Agencies, Martha Anne Humphries, Donald R. Songer

Faculty Publications

Administrative agencies play a substantial role in the formulation and implementation of national policy Central to this role is their exercise of discretion. A normative consensus exists that such discretion should be constrained by administrative deference to the rule of law. The courts of appeals are expected to insure that such discretion is constrained. The analysis reported below examines how effectively they fulfill that expectation The findings suggest that agency success is related to political considerations, with agencies being successful when their decisions are consistent with the policy preferences of the judges. However, variables that captured elements of the legal …

La France Et L'Égypte De 1882 À 1914: Intérêts Économiques Et Implications Politiques, By Samir Saul, Michael S. Smith

Faculty Publications

A review of La France et l'Égypte de 1882 à 1914: Intérêts économiques et implications politiques, by Samir Saul

Rainfall Stimulation Of Primary Production In Western Atlantic Ocean Waters: Roles Of Different Nitrogen Sources And Co-Limiting Nutrients, Hans W. Paerl, Joan D. Willey, Malia Go, Benjamin L. Peierls, James L. Pinckney, Marilyn L. Fogel

Faculty Publications

Using shipboard bioassays, we examined the roles rainfall, individual and combined nutrients play in accelerating primary production in coastal, Gulf Stream and pelagic (Sargasso Sea) locations in the North Atlantic Ocean off North Carolina, USA, from 1993 to 1995. Photosynthetic CO₂ fixation and net chlorophyll a (chl a) production were measured In replicated bioassays to assess individual and combined impacts of different constituents of atmospheric deposition, including natural rainfall, a synthetic rain mix, dissolved inorganic nitrogen (DIN; NH₄⁺ ,NO₃^-), dissolved organic nitrogen (DON; urea),phosphorus (PO₄^3-) and iron (as EDTA-chelated and …

South Carolina Legal Resources On The Web, Duncan E. Alford

Faculty Publications

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