Digital Commons Network^™

Gan-Algan Heterostructure Field-Effect Transistors Over Bulk Gan Substrates, M. Asif Khan, J. W. Yang, W. Knap, E. Frayssinet, X. Hu, Grigory Simin, P. Prystawko, M. Leszczynski, I. Grzegory, S. Porowski, R. Gaska, M. S. Shur, B. Beaumont, M. Teisseire, G. Neu

Faculty Publications

We report on AlGaN/GaN heterostructures and heterostructurefield-effect transistors(HFETs) fabricated on high-pressure-grown bulk GaN substrates. The 2delectron gas channel exhibits excellent electronic properties with room-temperature electron Hall mobility as high as μ=1650 cm²/V s combined with a very large electron sheet density n_s≈1.4×10¹³ cm⁻².The HFET devices demonstrated better linearity of transconductance and low gate leakage, especially at elevated temperatures. We also present the comparative study of high-current AlGaN/GaN HFETs(n_sμ>2×10¹⁶ V⁻¹ s⁻¹) grown on bulk GaN, sapphire, and SiC substrates under the same conditions. We demonstrate that in …

Ethics For Adversaries: The Morality Of Roles In Public And Professional Life By Arthur Isak Applbaum, Daniel R. Sabia

Faculty Publications

No abstract provided.

Legacy - June 2000, South Carolina Institute Of Archaeology And Anthropology--University Of South Carolina

SCIAA Magazine - Legacy & PastWatch

Contents:

Humanitarian Exhumation at the Citadel's Johnson Hagood Stadium.....p. 1
Director’s Notes.....p. 2
Indigo Society Cannon.....p. 8
Ground Penetrating Radar Grant.....p. 10
Standards and Guidelines Approved.....p. 10
Mississippian Period Research.....p. 11
Catherine Brown Site.....p. 16
Bush Hill Plantation.....p. 16
Silver Bluff Field School.....p. 16
Public Outreach Coordinator Hired.....p. 17
Current Historical Archaeology Publications.....p. 17
Petroglyph Survey.....p. 18
Santa Elena/Charlesfort Field Season 2000.....p. 20
Archival Research on Santa Elena/Charlesfort.....p. 22
Francis Marion Search Continues.....p. 23
Rivers Yield Diverse Artifacts.....p. 24
Hunley Recovery Set for July.....p. 26
Public Access to Shipwrecks.....p. 27
Help Needed on Underwater Trail.....p. 28
Cooper River Trail Slates …

Flotsam And Jetsam - June 2000, South Carolina Institute Of Archaeology And Anthropology--University Of South Carolina

Sport Diver Newsletters

Contents:

Anchor Placed On Cooper River Trail..... p.1
Volunteers Needed To Assist In Cooper River Trail Maintenance..... p.2
The Bottom Line..... p.2
Shipwreck Found On Kiawah Beach..... p.3
Kiawah Island Steeped In Beauty And History..... p.3
Teacher Uses FfC Training In Charlotte Middle School Underwater Archaeology Program..... p.4
North Augusta Hobby Diver Records Sites In Savannah River..... p.6
Research Links Artifacts From Blackbeard's Flagship To Charleston..... p.8
Field Training Course Set For August..... p.10
Registration Form - 2000 FTC I..... p.11

Winyah Bay Indigo Society Cannon Project, Jonathan Leader

Faculty & Staff Publications

No abstract provided.

Comparison Of A Dietary Record Using Reported Portion Size Versus Standard Portion Size For Assessing Nutrient Intake, Desiree C. Welten, Ruth A. Carpenter, R. Sue Mcpherson, Suzanne Brodney, Deirdre Douglass, James B. Kampert, Steven N. Blair

Faculty Publications

Objective: Because the percentage of missing portion sizes was large in the Aerobics Center Longitudinal Study (ACLS), careful consideration of the accuracy of standard portion sizes was necessary. The purpose of the present study was to investigate the consequences of using standard portion size instead of reported portion sizes on subjects' nutrient intake.

Methods: In 2307 men and 411 women, nutrient intake calculated from a 3-day dietary record using reported portion sizes was compared with nutrient intake calculated from the same record in which standard portion sizes were substituted for reported portion sizes.

Results: The standard portion sizes provided significantly …

Islamic Political Culture, Democracy, And Human Rights, By Daniel E. Price, Shahrough Akhavi

Faculty Publications

No abstract provided.

An Est-Enriched Comparative Map Of Brassica Oleracea And Arabidopsis Thaliana, Tien-Hung Lan, Terrye A. Delmonte, Kim P. Reischmann, Joel Hyman, Stanley P. Kowalski, Jim Mcferson, Stephen Kresovich, Andrew H. Paterson

Faculty Publications

A detailed comparative map of Brassica oleracea and Arabidopsis thaliana has been established based largely on mapping of Arabidopsis ESTs in two Arabidopsis and four Brassica populations. Based on conservative criteria for inferring synteny, “one to one correspondence” between Brassica and Arabidopsis chromosomes accounted for 57% of comparative loci. Based on 186 corresponding loci detected in B. oleracea and A. thaliana, at least 19 chromosome structural rearrangements differentiate B. oleracea and A. thaliana orthologs. Chromosomal duplication in the B. oleracea genome was strongly suggested by parallel arrangements of duplicated loci on different chromosomes, which accounted for 41% of loci …

Accumulation Hole Layer In P-Gan/Algan Heterostructures, M. S. Shur, A. D. Bykhovski, R. Gaska, J. W. Yang, Grigory Simin, M. A. Khan

Faculty Publications

We present the results on piezoelectric and pyroelectricdoping in AlGaN-on-GaN and GaN-on-AlGaN heterostructures and demonstrate p-GaN/AlGaN structures with accumulation hole layer. Our results indicate that polarization charge can induce up to 5×10¹³ cm⁻² holes at the AlGaN/GaN heterointerfaces. We show that the transition from three-dimensional (3D) to two-dimensional (2D) hole gas can be only achieved for hole sheet densities on the order of 10¹³ cm⁻² or higher. At lower densities, only 3D-hole accumulation layer may exist. These results suggest that a piezoelectrically induced 2D-hole gas can be used for the reduction of the base spreading resistance …

Low Fasting Plasma Glucose Level As A Predictor Of Cardiovascular Disease And All-Cause Mortality, Ming Wei, Larry W. Gibbons, Tedd L. Mitchell, James B. Kampert, Michael P. Stern, Steven N. Blair

Faculty Publications

Background - Although medical textbooks usually classify fasting plasma glucose <70 or 80 mg/dL (<3.89 or 4.44 mmol/L) as abnormal, the prognosis for patients with low fasting plasma glucose is unclear.

Methods and Results - We conducted prospective cohort studies among 40,069 men and women to investigate the association between fasting plasma glucose levels and cardiovascular disease and all-cause mortality. We documented a U-shaped relation between fasting plasma glucose and mortality. In addition to diabetes and impaired fasting glucose levels, low fasting plasma glucose levels were also associated with high morality. After multivariate adjustment for age, sex, study population, ethnicity, current smoking status, high blood pressure, total cholesterol, body mass index, triglycerides, history of cardiovascular disease and cancer, and a family …

Using Implicit Feedback For User Modeling In Internet And Intranet Searching, Jinmook Kim, Douglas W. Oard, Kathleen Romanik

Faculty Publications

Powerize Server 1.0, developed by Powerize.com, is a content-based information filtering and retrieval system that presently uses a manually constructed user model known as a search profile. User modeling captures a user’s information needs. A user model can be constructed explicitly by the user or implicitly by exploiting feedback from the user about which documents are relevant. Implicit feedback can be inferred from user behavior without any additional work on the part of the user. The study reported in this paper investigates a way of implementing the implicit feedback technique of user modeling for the Powerize Server 1.0. Previous studies …

Review Of The Software "Dans Un Quartier De Paris", Lara Lomicka, Hélène Gresso

Faculty Publications

No abstract provided.

3d Outside Cell Interference Factor For An Air-Ground Cdma ‘Cellular’ System, David W. Matolak

Faculty Publications

We compute the outside-cell interference factor of a code-division multiple-access (CDMA) system for a three-dimensional (3-D) air-to-ground (AG) "cellular-like" network consisting of a set of uniformly distributed ground base stations and airborne mobile users. The CDMA capacity is roughly inversely proportional to the outside-cell interference factor. It is shown that for the nearly free-space propagation environment of these systems, the outside-cell interference factor can be larger than that for terrestrial propagation models (as expected) and depends approximately logarithmically upon both the cell height and cell radius.

April 27, 2000 Faculty Senate Minutes, University Of South Carolina

Faculty Senate

No abstract provided.

An Optimal-Order Error Estimate For An Ellam Scheme For Two-Dimensional Linear Advection-Diffusion Equations, Hong Wang

Faculty Publications

An Eulerian-Lagrangian localized adjoint method (ELLAM) is presented and an- alyzed for two-dimensional linear advection-diffusion partial differential equations (PDEs). An optimal-order error estimate in the L^2 norm and a superconvergence estimate in a discrete H^1 norm are derived. Numerical experiments are performed to verify the theoretical estimates.

April 5, 2000 Faculty Senate Minutes, University Of South Carolina

Faculty Senate

No abstract provided.

Are The Public Schools Detectably Safe, Perry A. Zirkel

The Journal of Law and Education

No abstract provided.

Law Review Digests

The Journal of Law and Education

No abstract provided.

Settlement Patterns And The Origins Of African Jamaican Society: Seville Plantation, St. Ann's Bay, Jamaica, Douglas V. Armstrong, Kenneth G. Kelly

Faculty Publications

Archaeological and historical research at Seville Plantation, Jamaica, are used to explain changes in settlement patterns within the estate's African Jamaican community between 1670 and the late nineteenth century. Sugar plantations, such as Seville, are marked by well-defined spatial order based upon economic and power relations that was imposed upon enslaved communities by planters and managers. Archaeological evidence is used to explore how enslaved Africans modified this imposed order and redefined boundaries in ways that correspond with the development of a distinct African Jamaican society. The rigidly defined linear housing arrangements initially established by the planter, and their relations to …

The Father's Witness: Patriarchal Images Of Boys, David Lee Miller

Faculty Publications

No abstract provided.

Caroliniana Columns - Spring 2000, University Libraries--University Of South Carolina

University South Caroliniana Society Newsletter - Columns

Contents:

Latimer Papers Offer Inside Scoop On The State..... p.1
August Kohn: Versatile South Carolinian..... p.1
66th Annual Meeting University South Caroliniana Society..... p.1
The President's Corner..... p.2
A Northern Light..... p.2
Compassionate Leadership: The Robert E. McNair Papers Project..... p.4
Maps, Maps and More Maps..... p.5
Fourth Volume of South Carolina Postcards..... p.8
SCL Staff News..... p.9
Historical Marker Commemorates Governor John West's Boyhood Home..... p.9
S.C. Academy of Authors Inductees Featured in SCL Exhibit..... p.10
Abbie Christensen and the Gullah Tales of Port Royal..... p.11
Black History Month Exhibit at SCL..... p.12
Memorials..... p.12

Reflections - Spring 2000, University Libraries--University Of South Carolina

Reflections

Contents:

Valuable Research Materials Are Located in Thomas Cooper Library’s Government Information, Microform, and Newspaper Collections..... p.1
Bill Sudduth, Head of Government Information, Microform, and Newspaper Collections..... p.2
University Libraries Establish Ex Libris Society..... p.3
Y2K: A Cause for Celebration and Thanks..... p.3
Libraries Receive Endowment for Reference and Information Resources..... p.3
USC Secures State Funding for Distance Education..... p.4
New Faces: Marna Hostetler..... p.4
News from Thomas Cooper Library’s Special Collections..... p.5
IRIS Provides Computer Support Via the Web..... p.6
Exhibit Features South Carolina Writers..... p.6
Payne Endowment Established..... p.7
South Caroliniana Library Receives Hennig Family Library..... p.7
TCL …

Usury Trompe L'Oeil, James J. White

South Carolina Law Review

No abstract provided.

John Milton & Seventeenth Century Culture, University Libraries--University Of South Carolina

Rare Books & Special Collections Publications

This catalog outlined the exhibit that included twenty-three 17th-century Milton editions, most notably the first editions of Milton’s first prose work (1641), of his great defense of a free press Areopagitica (1644), of his first collection of poetry (1645), and of several political works of the 1650s. The exhibit included all four editions of Paradise Lost published during Milton’s lifetime. Complementing the books on display were engravings of English and Italian cities where Milton lived, studied and visited.

March 1, 2000 Faculty Senate Minutes, University Of South Carolina

Faculty Senate

No abstract provided.

Strategic Auditing In A Political Hierarchy: An Informational Model Of The Supreme Court's Certiorari Decisions, Charles M. Cameron, Jeffrey A. Segal, Donald Songer

Faculty Publications

We examine how the Supreme Court uses signals and indices from lower courts to determine which cases to review. In our game theoretic model, a higher court cues from publicly observable case facts, the known preferences of a lower court and its derision. The lower court attempts to enforce its own preferences, exploiting ambiguity in cases' fact patterns. In equilibrium, a conservative higher court declines to review conservative decisions from lower courts regardless of the facts of die case or the relative ideology of the judges. But a conservative higher court probabilistically reviews liberal decisions, with the "audit rate" tied …

Lattice And Energy Band Engineering In Alingan/Ga Heterostructures, M. Asif Khan, J. W. Yang, Grigory Simin, R. Gaska, M. S. Shur, Hans-Conrad Zur Loye, G. Tamulaitis, A. Zukauskas, David J. Smith, D. Chandrasekhar, R. Bicknell-Tassius

Faculty Publications

We report on structural, optical, and electrical properties of Al_xIn_yGa_1−x−yNGaNheterostructures grown on sapphire and 6H–SiC substrates. Our results demonstrate that incorporation of In reduces the lattice mismatch, Δa, between AlInGaN and GaN, and that an In to Al ratio of close to 1:5 results in nearly strain-free heterostructures. The observed reduction in band gap,ΔE_g, determined from photoluminescence measurements, is more than 1.5 times higher than estimated from the linear dependencies of Δa and ΔE_g on the In molar fraction. The incorporation of In and resulting changes in the built-in strain in …

February 2, 2000 Faculty Senate Minutes, University Of South Carolina

Faculty Senate

No abstract provided.

Correlates Of Physical Activity In Male And Female Youth, Timothy Bungum, Marsha Dowda, Anne T. Weston, Stewart G. Trost, Russell R. Pate

Faculty Publications

This study examined associations between psychosocial factors and physical activity in a group of youth (n=520). Students completed the Previous Day Physical Activity Recall and a survey of potential determinants of physical activity. Regression analyses of intentions to be physically active revealed that enjoyment and self-efficacy predicted intentions for both males and females. Attitudes predicted moderate to vigorous activity (MVPA), and enjoyment and self-efficacy predicted vigorous activity (VPA) for males. Self-efficacy predicted both MVPA and VPA for females. The findings suggest that intervention programs targeted at youth should include developmentally appropriate activities that are fun and promote physical …

Selective Area Deposited Blue Gan-Ingan Multiple-Quantum Well Light Emitting Diodes Over Silicon Substrates, J. W. Yang, A. Lunev, Grigory Simin, A. Chitnis, M. Shatalov, M. Asif Khan, Joseph E. Van Nostrand, R. Gaska

Faculty Publications

We report on fabrication and characterization of blue GaN–InGaN multi-quantum well (MQW)light-emitting diodes(LEDs) over (111) silicon substrates. Device epilayers were fabricated using unique combination of molecular beam epitaxy and low-pressure metalorganic chemical vapor depositiongrowth procedure in selective areas defined by openings in a SiO₂mask over the substrates. This selective area deposition procedure in principle can produce multicolor devices using a very simple fabrication procedure. The LEDs had a peak emission wavelength of 465 nm with a full width at half maximum of 40 nm. We also present the spectral emission data with the diodes operating up to 250 …