Digital Commons Network^™

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.

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 …

America's Uneasy Relationship With The Working Poor, A. Mechele Dickerson

Faculty Publications

No abstract provided.

Biogeochemical Transformations And Potential Polyaromatic Hydrocarbon Degradation In Macrofaunal Burrow Sediments, W. K. Chung, Gary M. King

Faculty Publications

A variety of polyaromatic hydrocarbons (PAH) including naphthalene, phenanthrene, acenaphthene, and dibenzothiophene were degraded with little or no lag in oxic slurries of marine sediments from burrow walls constructed by benthic macrofauna. PAH degradation potentials of burrow sediments from the polychaetes Nereis virens and Clymenella torquata, the mollusc Mya arenaria and the enteropneust Saccoglossus bromophenolosus were generally greater than potentials for non-burrow sediments; relative rates of degradation varied among the burrow wall sediments depending on the PAH assayed. Comparisons of the effects of available electron acceptors (oxygen, nitrate, ferric iron, sulfate) indicated that significant degradation of benzene, hexadecane and PAH …

Synthesis And Unusual Properties Of The First 2,3,7,8,12,13,17,18-Octabromo-5,10,15,20-Tetraalkylporphyrin, Nora Y. Nelson, Craig J. Medforth, Daniel J. Nurco, Song Ling Jia, John A. Shelnutt, Kevin M. Smith

Faculty Publications

The new perhalogenated porphyrin 2,3,7,8,12,13,17,18-octabromo-5,10,15,20-tetrakis(trifluoromethyl)porphinato -nickel(II) exhibits several striking features, including an extremely ruffled macrocycle with a very short Ni-N distance, an unusually red-shifted optical spectrum, and, surprisingly, hindered rotation of the meso-trifluoromethyl substituents (ΔG2+78 = 47 kJ mol-1).

Discovery Of The Optical Transient Of Grb 990308, Bradley E. Schaefer, J. A. Snyder, J. Hernandez, B. Roscherr, M. Deng, N. Ellman, C. Bailyn, A. Rengstorf, D. Smith, A. Levine, S. Barthelmy, P. Butterworth, K. Hurley, T. Cline, C. Meegan, C. Kouveliotou, R. M. Kippen, H. S. Park, G. G. Williams, R. Porrata, R. Bionta, D. Hartmann, D. Band, D. Frail, S. Kulkarni, J. Bloom, S. Djorgovski, D. Sadava, F. Chaffee, F. Harris, C. Abad, B. Adams, P. Andrews

Faculty Publications

The optical transient of the faint gamma-ray burst GRB 990308 was detected by the QUEST camera on the Venezuelan 1 m Schmidt telescope starting 3.28 hr after the burst. Our photometry gives V= 18.32 ± 0.07, R = 18.14 ± 0.06, B = 18.65 ± 0.23, and R = 18.22 ± 0.05 for times ranging from 3.28 to 3.47 hr after the burst. The colors correspond to a spectral slope of close to fv ∝ v1/3. Within the standard synchrotron fireball model, this requires that the external medium be less dense than 104 cm-3, the electrons contain more than 20% …

Phonon And Elastic Instabilities In Moc And Mon, Gus L. W. Hart, Barry M. Klein

Faculty Publications

We present several results related to the instability of MoC and MoN in the B1 (sodium chloride) structure. These compounds were proposed as potential superconductors with moderately high transition temperatures. We show that the elastic instability in B1-structure MoN, demonstrated several years ago, persists at elevated pressures, thus offering little hope of stabilizing this material without chemical doping. For MoC, another material for which stoichiometric fabrication in the B1 structure has not proven possible, we find that all of the cubic elastic constants are positive, indicating elastic stability. Instead, we find X-point phonon instabilities in MoC (and in MoN as …

Luther On The Hidden God, Steven D. Paulson

Faculty Publications

It is not so much that God cannot be seen that concerns Luther, but that God actually and actively hides. God hides in order not to be found where humans want to find God. But God also hides in order to be found where God wills to be found.

The Effects Of Music On Mood And Perception Of A Visual Stimulus, Elizabeth J. Vella Phd, Michael D. Irvin, Jason Solle, Scott Berendt, Erin E. Ramirez

Faculty Publications

We examined the influence of music on mood by instructing 81 undergraduate students to complete the Multiple Affect Adjective Check List–Revised (MAACLR) both before and after watching a 15-min video that was or was not paired with a piece of music. The 2 music categories were pleasant or depressing. Participants from the depressing group experienced a drop in positive affect, whereas participants from the pleasant group showed an increase on this measure. Men from the pleasant group had the highest pretreatment and lowest post treatment anxiety scores, whereas the women displayed no change in anxiety. The results indicate that music …

(Seven Principles For Good Practice In Legal Education): Principle 5: Good Practice Emphasizes Time On Task, R. Lawrence Dessem

Faculty Publications

Time plus energy equals learning. Efficient time-management skills are critical for students and professors alike. Allocating realistic amounts of time means effective learning for students and effective teaching for faculty. How an institution defines time expectations for students, faculty, administrators, and other professional staff can establish the basis for high performance for all. The fifth principle for good practice in undergraduate education is almost a truism: good practice emphasizes time on task. In their original statement of the seven principles, Arthur W. Chickering and Zelda F. Gamson expressed this as a mathematical formula: “Time plus energy equals learning.” Time on …

Why In-House Live Client Clinics Won't Work In Romania: Confessions Of A Clinician Educator, Rodney J. Uphoff

Faculty Publications

Romanians eat our Big Macs, wolf down pizza slices at Pizza Hut, and guzzle Coca-Cola. They wear baseball caps, Nike clothing, and tennis shoes. They listen to American rap and pop music, see American movies with Romanian subtitles, and watch all of our old television shows. Romanians of all ages, but especially the young, hunger and thirst for all things Western, particularly from the United States. Doesn't it follow, then, that Romanian law schools ought to have - and, indeed, Romanian law professors would want - that symbol of an innovative, modern American law school curriculum: a live client clinical …

Optical And Radio Observations Of The Afterglow From Grb 990510: Evidence For A Jet, F. A. Harrison, J. S. Bloom, D. A. Frail, R. Sari, S. R. Kulkarni, S. G. Djorgovski, T. Axelrod, J. Mould, B. P. Schmidt, M. H. Wieringa, R. M. Wark, R. Subrahmanyan, D. Mcconnell, P. J. Mccarthy, B. E. Schaefer, R. G. Mcmahon, R. O. Markze, E. Firth, P. Soffitta, L. Amati

Faculty Publications

We present multicolor optical and two-frequency radio observations of the bright BeppoSAX event GRB 990510. Neither the well-sampled optical decay nor the radio observations are consistent with simple spherical afterglow models. The achromatic steepening in the optical band and the early decay of the radio afterglow, which both occur at t ∼ 1 day, are evidence for hydrodynamical evolution of the source and can be most easily interpreted by models in which the gamma-ray burst ejecta are collimated in a jet. Employing a simple jet model to explain the observations, we derive a jet opening angle of θ0 = 0.08(n/l …

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 …

Desire, Violence, And The Passion In Fragment Vii Of "The Canterbury Tales": A Girardian Reading, Curtis Gruenler

Faculty Publications

Part of a special issue on René Girard. The tales of fragment 7 of Chaucer's Canterbury Tales collectively address the problem of human violence and the potential of literature to perpetuate or remedy this problem. The narrative that links the two middles tales of fragment 7 provides a critique of violence that goes beyond mere opposition to war. In this narrative, Chaucer alludes to Christ's crucifixion and death in order to speak as a witness to suffering. In the first three tales of fragment 7—The Shipman's Tale, The Prioress's Tale, and Sir Thopas,—Chaucer depicts the tendencies to mythologize violence in …

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.

Factitious Disorders And Trauma-Related Diagnoses, Daniel Brown, Alan Scheflin

Faculty Publications

The recent plethora of lawsuits involving allegations of iatrogenically implanted memories of satanic ritual abuse and other traumas has highlighted the existence of a unique group of psychiatric patients. Although these patients are often successful at deceiving therapists (and sometimes juries), the case studies in this special issue reveal the chronic nature of their propensity to invent traumatic identities and past histories. The core clinical features of affect dysregulation, somatization, and impaired object relations, together with frequent histories of alcohol and substance abuse, parallel the psychiatric co-morbidity frequently found in genuine trauma victims. These case studies also point to early …

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

Pretransitional Behavior Above The Nematic-Isotropic Phase Transition Of An Auxetic Trimer Liquid Crystal, Daeseung Kang, Milind P. Mahajan, Shiyong Zhang, Rolfe G. Petschek, Charles Rosenblatt, Chaobin He, Puwei Lu, A.C. Griffin

Faculty Publications

Static Light scattering and electric field-induced Kerr measurements were performed above the nematic-isotropic phase transition of a terminal-lateral-lateral-terminal negative Poisson ratio trimer. Far both measurements the inverse susceptibility was observed to be nearly linear with temperature, a result inconsistent with our previously reported Kerr data [Phys. Rev. E 58, 2041 (1998)]. [S1063-651X(99)11010-9].

Children's Interests In A Family Context - A Cautionary Note, James G. Dwyer

Faculty Publications

No abstract provided.

Practical Magic: A Few Down-To-Earth Suggestions For The New Sentencing Commission, Frank O. Bowman Iii

Faculty Publications

Most of the contributions to this outpouring of advice to the new Sentencing Commissioners have to do with the substance of the Guidelines. What follows here is far more prosaic - some suggestions not about what the Commission should do, but about how the Commission should work. I make these suggestions with some trepidation, recognizing the difficulty of the task the new members have undertaken. However, I hope the perspective of one who practiced before and after the Guidelines as a federal prosecutor, participated in the internal workings of the Commission as Special Counsel in 1995-96, and has been a …

Court Issues Major Ruling On Mediation Confidentiality, Richard C. Reuben

Faculty Publications

A prominent federal court judge has issued an important ruling on mediation confidentiality, one that promises to influence both doctrinal and legislative development.

The case is Olan v Congress Mortgage Co., 1999 WL 909731 (N.D.Cal.), and in it, federal Magistrate Judge Wayne Brazil ultimately compels testimony by a California mediator, despite California's categorical exclusion of evidence arising from mediations. The lengthy opinion is most scholarly, and well worth taking the time to read.

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 …

Unreviewability In State Administrative Law, Charles H. Koch Jr.

Faculty Publications

No abstract provided.

Negotiated Development Denial Meets People's Court: Del Monte Dunes Brings New Wildcards To Exactions Law, Jonathan M. Davidson, Ronald H. Rosenberg, Michael C. Spata

Faculty Publications

The United States Supreme Court Answered "YES" to the $1.45 million over exaction question for 1999. In City of Monterey v. Del Monte Dunes at Monterey Ltd., a unanimous court extended the scope of compensatory takings review beyond land dedication conditions into the realm of regulatory denial. Justice Kennedy's opinion vitalized the "legitimate state interests" test from Agins v. City of Tiburon to sustain an inverse condemnation conclusion and damage award to the frustrated developer. A majority of the court also concurred that the trial court may delegate this takings conclusion to the jury under federal civil rights law. The …

Delaware's Capital Jury Selection: Inadequate Voir Dire And The Problem Of Automatic Death Penalty Jurors, Adam M. Gershowitz

Faculty Publications

No abstract provided.

Review Of Affirmations And Admonitions: Lutheran Decisions And Dialogue With Reformed, Episcopal, And Roman Catholic Churches By Gabriel Fackre And Michael Root, Denis Fortin

Faculty Publications

No abstract provided.

The Pendulum Swings Again, Richard C. Reuben

Faculty Publications

Mandatory arbitration provisions in contracts of adhesion expose the difficult tension between individual contractual rights and collective contractual needs. The question is where we draw the line. The law of adhesion contracts has traditionally used the doctrine of unconscionability to draw that line, and cases like Graham v Scissor-Tail more precisely instruct us to draw it at the reasonable expectations of the parties. By presumptively refusing to enforce cram-down arbitration provisions for consumer claims, absent evidence of knowing and voluntary waiver, we will restore those reasonable expectations, and, in the words of the case law, ensure minimum levels of integrity …

High Crimes And Misdemeanors: Defining The Constitutional Limits On Presidential Impeachment, Frank O. Bowman Iii, Stephen L. Sepinuck

Faculty Publications

This Article had its genesis in a statement by the authors submitted to the House Judiciary Committee during its proceedings regarding the impeachment of President Clinton. This final much expanded version appears after the conclusion of the Clinton impeachment proceedings in the Senate, and it is certainly informed by the course those proceedings took. Strictly speaking, however, this is not an article “about” the Clinton impeachment. Although this Article draws some conclusions from the treatment by the House and Senate of the fundamental allegations against President Clinton, it does not address in detail the specific facts underlying those allegations. The …

Regulation Of Franchisor Opportunism And Production Of The Institutional Framework: Federal Monopoly Or Competition Between The States?, Alan J. Meese

Faculty Publications

Most scholars would agree that a merger between General Motors and Ford should not be judged solely by Delaware corporate law, even if both firms are incorporated in Delaware. Leaving the standards governing such mergers to state law would assuredly produce a race to the bottom that would result in unduly permissive treatment of such transactions. Similarly, if the two firms agreed to divide markets, most would agree that some regulatory authority other than Michigan or Delaware should have the final word on the agreement. Thus, in order to forestall monopoly or its equivalent, the national government must itself exercise …

Collisional Dynamics Of Bi2 A(0U+). I. Quantum-Resolved Vibrational Energy Transfer For V′=0–4, Robert E. Franklin, Glen P. Perram

Faculty Publications

Vibrational-to-translational energy transfer between the lowest vibrational levels (v′=0–4) of the A(0⁺_u) state of Bi₂ has been investigated using spectrally resolved, laser-induced fluorescence techniques. The small vibrational spacing (ω′e≃132 cm⁻¹) leads to highly nonadiabatic conditions, particularly for the Bi₂(A)–He collision pair. However, the Δv=−1 transition probabilities for collisions with the rare gases range from 0.75% to 1.75% per collision, considerably lower than would be anticipated from standard vibrational energy transfer theory. Multiquantum (Δv′=±2) transfer rates are low, consistent with the low anharmonicity of the A(0⁺_u) state. The rates for …