Digital Commons Network^™

Enhanced Luminescence In Ingan Multiple Quantum Wells With Quaternary Alingan Barriers, Jianping Zhang, J. Yang, Grigory Simin, M. Shatalov, M. Asif Khan, M. S. Shur, R. Gaska

Faculty Publications

We report on the comparative photoluminescence studies of AlGaN/GaN, GaN/InGaN, and AlInGaN/InGaN multiple quantum well(MQW) structures. The study clearly shows the improvement in materials quality with the introduction of indium. Our results point out the localized state emission mechanism for GaN/InGaN structures and the quantum well emission mechanism for AlInGaN/InGaN structures. The introduction of indium is the dominant factor responsible for the observed differences in the photoluminescence spectra of these MQW structures.

High Electron Mobility In Algan/Gan Heterostructures Grown On Bulk Gan Substrates, E. Frayssinet, W. Knap, P. Lorenzini, N. Grandjean, J. Massies, C. Skierbiszewski, T. Suski, I. Grzegory, S. Porowski, Grigory Simin, X. Hu, M. Asif Khan, M. S. Shur, R. Gaska, D. Maude

Faculty Publications

Dislocation-free high-quality AlGaN/GaN heterostructures have been grown by molecular-beam epitaxy on semi-insulating bulk GaN substrates. Hall measurements performed in the 300 K–50 mK range show a low-temperature electron mobility exceeding 60 000 cm²/V s for an electron sheet density of 2.4×10¹²cm⁻². Magnetotransport experiments performed up to 15 T exhibit well-defined quantum Hall-effect features. The structures corresponding to the cyclotron and spin splitting were clearly resolved. From an analysis of the Shubnikov de Hass oscillations and the low-temperature mobility we found the quantum and transport scattering times to be 0.4 and 8.2 ps, respectively. The …

October 4, 2000 Faculty Senate Minutes, University Of South Carolina

Faculty Senate

No abstract provided.

Optical Bandgap Formation In Alingan Alloys, G. Tamulaitis, K. Kazlauskas, S. Juršėnas, A. Žukauskas, M. A. Khan, J. W. Yang, J. Zhang, Grigory Simin, M. S. Shur, R. Gaska

Faculty Publications

We report on the spectral dynamics of the reflectivity, site-selectively excited photoluminescence,photoluminescence excitation, and time-resolved luminescence in quaternary AlInGaN epitaxial layers grown on GaN templates. The incorporation of a few percents of In into AlGaN causes significant smoothening of the band-bottom potential profile in AlInGaN layers owing to improved crystal quality. An abrupt optical bandgap indicates that a nearly lattice-matched AlInGaN/GaN heterostructure with large energy band offsets can be grown for high-efficiency light-emitting devices.

Stop The Presses: Censorship And The High School Journalist, Scott Andrew Felder

The Journal of Law and Education

No abstract provided.

Does Nala Provide Rights Or Merely Rites, Perry A. Zirkel

The Journal of Law and Education

No abstract provided.

The Impact Of The Native American Languages Act On Public School Curriculum: A Different View, Jim Littlejohn

The Journal of Law and Education

No abstract provided.

Law Review Digests

The Journal of Law and Education

No abstract provided.

Part-Time Public School Attendance And The Freedom Of Religion: Yoder's Impact Upon Swanson, Jeff Prather

The Journal of Law and Education

No abstract provided.

Using Social Sciences To Assess The Need For Jury Reform In South Carolina, Roger M. Young

South Carolina Law Review

No abstract provided.

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

University South Caroliniana Society Newsletter - Columns

Contents:

University South Caroliniana Society Celebrates 64th Annual Meeting..... p.1
Photographic Preservation Grant Underway..... p.1
In Memoriam--May Belser Douglass..... p.5
Endowment and Fellowship News..... p.5
Where Pine Trees Forever Grew..... p.6
Looking Back over 200 Years: University of South Carolina..... p.8
65th Annual University South Caroliniana Society Meeting Announced..... p.9
Partners with the Sun - South Carolina Photographers, 1840-1940..... p.10
Will These Gentlemen Remain Unknown Soldiers?..... p.11
A Caroliniana Interior by Artist Philip Mullen ..... p.12
Memorials..... p.12

Supreme Court: Enemy Of Freedom - Constitutional Law In Christian School Textbooks, Frances R. A. Paterson

The Journal of Law and Education

No abstract provided.

Recent Developments In The Law - Universities And Other Institutions Of Higher Learning

The Journal of Law and Education

No abstract provided.

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

Reflections

Contents:

Proxy Server Extends Library Databases Beyond Campus Boundaries..... p.1
Thomas Cooper Library Events..... p.2
TCL Reference Study Area Gets New Look..... p.2
News Briefs: South Caroliniana Library..... p.3
Conservation Laboratory Awarded Preservation Grant..... p.3
University Libraries Increase Endowments..... p.4
New Faces: Rose Marshall, Carol Crawford, Hui Hua Chua, Louisa Campbell, Deborah Clanton and Elizabeth Sudduth..... p.4
News from Thomas Cooper Library Special Collections..... p.5
Music Library Receives Toscanini Collection..... p.5
Film Library Treasures: Dolmetsch Consort..... p.6
ILL Express! Extended to USC Regional and Four-year Campuses..... p.7
Distance Education Faculty Forums Offered..... p.7
South Caroliniana Library Owns 19th Century Glass …

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

Faculty Senate

No abstract provided.

Regulation Of Sup Expression Identifies Multiple Regulators Involved In Arabidopsis Floral Meristem Development, Hajime Sakai, Beth A. Krizek, Steven E. Jacobsen, Elliot M. Meyerowitz

Faculty Publications

During the course of flower development, floral homeotic genes are expressed in defined concentric regions of floral meristems called whorls. The SUPERMAN ( SUP, also called FLO10 ) gene, which encodes a C2H2-type zinc finger protein, is involved in maintenance of the stamen/carpel whorl boundary (the boundary between whorl 3 and whorl 4) in Arabidopsis. Here, we show that the regulation of SUP expression in floral meristems is complex, consisting of two distinct phases, initiation and maintenance. The floral meristem identity gene LEAFY ( LFY ) plays a role in the initiation phase through at least two pathways, which …

Algan/Gan Metal-Oxide-Semiconductor Heterostructure Field-Effect Transistors On Sic Substrates, M. Asif Khan, X. Hu, A. Tarakji, Grigory Simin, J. Yang, R. Gaska, M. S. Shur

Faculty Publications

We report on AlGaN/GaN metal–oxide–semiconductor heterostructurefield-effect transistors (MOS-HFETs) grown over insulating 4H–SiC substrates. We demonstrate that the dc and microwave performance of the MOS-HFETs is superior to that of conventional AlGaN/GaN HFETs, which points to the high quality of SiO₂/AlGaNheterointerface. The MOS-HFETs could operate at positive gate biases as high as +10 V that doubles the channel current as compared to conventional AlGaN/GaN HFETs of a similar design. The gate leakage current was more than six orders of magnitude smaller than that for the conventional AlGaN/GaN HFETs. The MOS-HFETs exhibited stable operation at elevated temperatures up to 300 …

Gettysburg: An Exhibit For The First-Year Reading Experience, Patrick G. Scott

Faculty Publications

Based on an exhibition for University of South Carolina students reading Michael Shaara's bestselling book The Killer Angels, this catalogue recounts the story of the battle of Gettysburg day by day, with an opening section introducing the major participants and a final section dealing with the commemoration of the battle and its treatment in later American literature. All the items in the exhibition are drawn from the Francis A. Lord Civil War Collection and the Robert S. Chamberlain Military History Collection, both in Rare Books & Special Collections, University of South Carolina Libraries.

Sio2-Passivated Lateral-Geometry Gan Transparent Schottky-Barrier Detectors, V. Adivarahan, Grigory Simin, J. W. Yang, A. Lunev, M. Asif Khan, M. Pala, M. Shur, R. Gaska

Faculty Publications

We report on a transparent Schottky-barrierultraviolet detector on GaN layers over sapphire substrates. Using SiO₂ surface passivation, reverse leakage currents were reduced to a value as low as 1 pA at 5 V reverse bias for 200 μm diameter device. The device exhibits a high internal gain, about 50, at low forward biases. The response time (about 15 ns) is RC limited, even in the internal gain regime. A record low level of the noise spectral density, 5×10⁻²³ A²/Hz, was measured at 10 Hz. We attribute this low noise level to the reduced reverse leakage current.

An Approximation To Miscible Fluid Flows In Porous Media With Point Sources And Sinks By An Eulerian-Lagrangian Localized Adjoint Method And Mixed Finite Element Methods, Hong Wang, Liang Dong, Richard E. Ewing, Stephen L. Lyons, Guan Qin

Faculty Publications

We develop an Eulerian–Lagrangian localized adjoint method (ELLAM)-mixed finite element method (MFEM) solution technique for accurate numerical simulation of coupled systems of partial differential equations (PDEs), which describe complex fluid flow processes in porous media. An ELLAM, which was shown previously to outperform many widely used methods in the context of linear convection-diffusion PDEs, is presented to solve the transport equation for concentration. Since accurate fluid velocities are crucial in numerical simulations, an MFEM is used to solve the pressure equation for the pressure and Darcy velocity. This minimizes the numerical difficulties occurring in standard methods for approximating velocities caused …

Preservation And Interpretive Plan For The Dill Tract Civil War Earthworks On James Island, South Carolina, Steven D. Smith

Faculty Publications

Beginning in the late fall of 1862 the Confederate Army defending Charleston began work on a line of earthworks and batteries across James Island, South Carolina, from Secessionville to the Stono River. The lines were called the "New Lines" to distinguish them from other lines built in 1861. Today, approximately 3,000 feet of these lines still exist in very good condition on a 17.3 acre tract of land that represent a portion of the Dill Tract. The tract and earthworks (archaeological site 38CH 195) are part of a noncontiguous district listed on the National Register of Historic Places and are …

Children's Understanding Of The Concept Of Physical Activity, Stewart G. Trost, Angela M. Morgan, Ruth P. Saunders, Gwen A. Felton, Dianne S. Ward, Russell R. Pate

Faculty Publications

This study evaluated 4th-grade students' understanding of the concept of physical activity and assessed the effects of two interventions to enhance the students' understanding of this concept. Students were randomly assigned to 1 of 3 conditions: the video group (n=40) watched a 5-min video describing physical activity; the verbal group (n=42) listened to a generic description of physical activity; the control group received no instruction (n=45). Students completed a 17-item checklist testing their understanding of the concept of physical activity. Compared to controls, students in the verbal and video group demonstrated significantly higher checklist …

Aintegumenta Promotes Petal Identity And Acts As A Negative Regulator Of Agamous, Beth A. Krizek, Valerie Prost, Anthony Macias

Faculty Publications

The Arabidopsis AINTEGUMENTA (ANT) gene has been shown previously to be involved in ovule development and in the initiation and growth of floral organs. Here, we show that ANT acts in additional processes during flower development, including repression of AGAMOUS (AG) in second whorl cells, promotion of petal epidermal cell identity, and gynoecium development. Analyses of ap2-1 ant-6 double mutants reveal that ANT acts redundantly with AP2 to repress AG in second whorl cells. The abaxial surface of ant petals contains features such as stomata and elongated, interdigitated cells that are not present on wild-type petals. …

Employers Beware: South Carolina's Public Policy Exception To The At-Will Employment Doctrine Is Likely To Keep Expanding, Melanie Robin Galberry

South Carolina Law Review

No abstract provided.

To (B) Or Not To (B): The Future Of Aider And Abettor Liability In South Carolina, Josephine T. Willis

South Carolina Law Review

No abstract provided.

Transboundary Groundwater Pollution: The Impact Of Evolving Groundwater Use Laws On Salt Water Intrusion Of The Floridian Aquifer Along The South Carolina-Georgia Border, J. Marshall Lawson

Southeastern Environmental Law Journal

No abstract provided.

Under The Dome - July 2000, Mckissick Museum--University Of South Carolina

Under the Dome, McKissick Museum Newsletter

Contents:

Many Faces of & on Traditional Southern Pottery.....p. 1
Making Faces: Southern Face Vessels from 1840-1990.....p. 1
University of South Carolina Bicentennial 1801-2001.....p. 2
2000 Jean Laney Harris Folk Heritage Awards.....p. 2
Collections Manager Attends the Newport Symposium.....p. 2
Gala Auction Brings Support.....p. 3
New Faces at McKissick.....p. 3
Library and Museum Partnership.....p. 4
Museum Meeting Applauds Blues.....p. 4
On View in the Galleries.....p. 4

An Approach To Program Assessment: Locating Indicators Of A Coherent Program, Murrary F. Mitchell

Faculty Publications

No abstract provided.

Abbeville County School District V. State: The Right To A Minimally Adequate Education In South Carolina, Jennifer L. Fogle

South Carolina Law Review

No abstract provided.

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

Faculty Senate

No abstract provided.