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Faculty Publications

1991

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Magnetic Response Of A Single, Isolated Gold Loop, V. Chandrasekhar, Richard A. Webb, M. J. Brady, M. B. Ketchen, W. J. Gallagher, A. Kleinsasser Dec 1991

Magnetic Response Of A Single, Isolated Gold Loop, V. Chandrasekhar, Richard A. Webb, M. J. Brady, M. B. Ketchen, W. J. Gallagher, A. Kleinsasser

Faculty Publications

Measurements have been made of the low-temperature magnetic response of single, isolated, micron-size Au loops. The magnetic response is found to contain a component which oscillates with the applied magnetic flux with a fundamental period of Φ0=h/e. The amplitude of the oscillatory component corresponds to a persistent current of ≃(0.3–2.0)evF/L, 1 to 2 orders of magnitude larger than predicted by current theories.

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A Cryogenic Double-Resonant Parabridge Motion Transducer For Resonant-Mass Gravitational Wave Detectors, O. D. Aguiar, W. W. Johnson, W. O. Hamilton Dec 1991

A Cryogenic Double-Resonant Parabridge Motion Transducer For Resonant-Mass Gravitational Wave Detectors, O. D. Aguiar, W. W. Johnson, W. O. Hamilton

Faculty Publications

We designed, constructed, and tested at 4.2 K (using two different low phase noise electrical pump generators) a cryogenic double-resonant parabridge motion transducer made out of niobium, whose electrical output was amplified by a two-stage metal-semiconductor field-effect transistor cryogenic amplifier. Most of the experimental results agreed well with the theoretical models. We were able to adjust the two electrical bridge resonant frequencies at the pump frequency, allowing us to obtain an electromechanical coupling as high as 0.054, and we successfully measured the mechanical Brownian motion of this transducer. In one case, we observed a dip in the electrical noise spectrum …

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"No Tobacco, No Hallelujah" , Terence E. Hays Dec 1991

"No Tobacco, No Hallelujah" , Terence E. Hays

Faculty Publications

According to myths and legends told by some peoples of New Guinea, tobacco is an ancient and indigenous plant, having appeared sponotaneously in a variety of ways. In other instances, the plant and the custom of smoking it are said to have been established by local culture heroes, while still other traditions prosaically cite adoptions from neighboring groups. On the basis of oral history alone, then, one might conclude that New Guinea tobacco appeared in widely scattered locations in the mythic past, and its distribution at the time of European contact is explainable as simple diffusion within the region.

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Time-Courses In The Retention Of Food Material In The Bivalves Potamocorbula Amurensis And Macoma Balthica: Significance To The Absorption Of Carbon And Chromium, Alan W. Decho, Samuel N. Luoma Dec 1991

Time-Courses In The Retention Of Food Material In The Bivalves Potamocorbula Amurensis And Macoma Balthica: Significance To The Absorption Of Carbon And Chromium, Alan W. Decho, Samuel N. Luoma

Faculty Publications

Time courses for ingestion, retention and release via feces of microbial food was investigated using 2 bivalves with different feeding strategies, Potamocorbula amurensis, and Macoma balthica. The results showed 2 pathways for the uptake of food material in these clams. The first is represented by an initial label pulse in the feces. The second pathway operates over longer time periods. Inert 51Cr-labeled beads were used to determine time frames for these pathways. The first pathway, involving extracellular digestion and intestinal uptake, is relatively inefficient in the digestion of bacterial cells by P. amurensis but more efficient in …

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Resource Integration Using A Large Knowledge Base In Carnot, Christine Collet, Michael N. Huhns, Wei-Min Shen Dec 1991

Resource Integration Using A Large Knowledge Base In Carnot, Christine Collet, Michael N. Huhns, Wei-Min Shen

Faculty Publications

A method for integrating separately developed information resources that overcomes incompatibilities in syntax and semantics and permits the resources to be accessed and modified coherently is described. The method provides logical connectivity among the information resources via a semantic service layer that automates the maintenance of data integrity and provides an approximation of global data integration across systems. This layer is a fundamental part of the Carnot architecture, which provides tools for interoperability across global enterprises.

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Mass Asymmetric Fission Barriers For 75br, D. N. Delis, Y. Blumenfeld, D. R. Bowman, N. Colonna, K. Hanold, K. Jing, M. Justice, J. C. Meng, Graham F. Peaslee, G. J. Wozniak, L. G. Moretto Nov 1991

Mass Asymmetric Fission Barriers For 75br, D. N. Delis, Y. Blumenfeld, D. R. Bowman, N. Colonna, K. Hanold, K. Jing, M. Justice, J. C. Meng, Graham F. Peaslee, G. J. Wozniak, L. G. Moretto

Faculty Publications

Fragments with atomic numbers covering nearly the entire range of the mass-asymmetry coordinate (4 < Z < 27) were observed from the 5.0, 6.2, 6.9, 8.0, 10.2 and 12.7 MeV/A 63Cu + 12C reactions. Energy spectra and angular distributions show the presence of projectile-like and target-like components along with an isotropic component. The isotropic component appears as a Coulomb ring in the invariant cross-section plots indicating the presence of a binary compound nucleus decay which is confirmed by the coincidence data. Excitation functions were constructed for each Z value and a nearly complete set of mass-asymmetric barriers has been extracted for 75Br. There is excellent agreement between the experimentally determined barriers and the finite-range model predictions.

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Single-Electron Charging Effects In Insulating Wires, Venkat Chandrasekhar, Zvi Ovadyahu, Richard A. Webb Nov 1991

Single-Electron Charging Effects In Insulating Wires, Venkat Chandrasekhar, Zvi Ovadyahu, Richard A. Webb

Faculty Publications

We present measurements of the transport properties of 0.75-μm-long, narrow, insulating indium oxide wires and rings. These devices have no apparent tunnel barriers, yet they exhibit effects similar to those found in series arrays of very small-capacitance tunnel junctions: highly nonlinear I-V characteristics and a zero-bias conductance which is periodic in a voltage applied by means of a lateral gate. These effects are due to the influence of single-electron charging on transport through localized states in the insulating regime.

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Normal Matrices Over Hermitian Discrete Valuation Rings, William A. Adkins Nov 1991

Normal Matrices Over Hermitian Discrete Valuation Rings, William A. Adkins

Faculty Publications

A generalization of the classical spectral theorem for normal complex matrices is proved for matrices with entries from a class of discrete valuation rings which we have called hermitian. The hermitian discrete valuation rings include the convergent complex power series in one variable and the complex formal power series in one variable. Thus one obtains an algebraic proof of Rellich's theorem on diagnolizability of hermitian analytic matrices which is simultaneously valid for both the rings of convergent and formal power series. © 1991.

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A Note On Repeated-Root Cyclic Codes, Robert H. Morelos-Zaragoza Nov 1991

A Note On Repeated-Root Cyclic Codes, Robert H. Morelos-Zaragoza

Faculty Publications

In papers by Castagnoli et al. and Van Lint, cyclic codes with repeated roots are analyzed. Both papers fail to acknowledge a previous work by Chen, dating back to 1969, which includes an analysis of even, length binary cyclic codes. Results from Chen’s study are presented.

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Searching On Cd-Rom In An Academic Environment, Margaret Sylvia, Leigh Kilman Nov 1991

Searching On Cd-Rom In An Academic Environment, Margaret Sylvia, Leigh Kilman

Faculty Publications

Novice information searchers are overwhelmed with the amount of material retrieved with a simple keyword search. Training users to retrieve the optimal amount of information and the correct information is a challenge for librarians.

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"Interpretative Aims And Textual-Critical Decisions: Some Historical Constraints In The Discrimination Of Textual Versions", Patrick G. Scott Nov 1991

"Interpretative Aims And Textual-Critical Decisions: Some Historical Constraints In The Discrimination Of Textual Versions", Patrick G. Scott

Faculty Publications

Responds to a recent article by Peter Shillingsburg (in Studies in Bibliography , 1991)on the taxonomy of authorial revision or textual versions, arguing that for critical, biographical and historical study the editor (and interpreter) is constrained in the choice of variant by the purpose for which the text is being used. Examples are drawn from Victorian authors, including Alfred Tennyson, specifically the versions of Maud, and John Henry Newman, specifically successive versions of what became The Idea of the University. Originally presented at a symposium on Shillingsburg's article at the Textual and Bibliographical Studies Section, South Atlantic Modern …

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The Effect Of A Tilted Magnetic Field On The Equilibrium Of A Pure Electron Plasma, Grant W. Hart Nov 1991

The Effect Of A Tilted Magnetic Field On The Equilibrium Of A Pure Electron Plasma, Grant W. Hart

Faculty Publications

If the magnetic field in a pure electron plasma containment device is not aligned with the axis of the conducting walls, the electrons in the device will accumulate at the ends of the plasma where the magnetic field lines come closest to the walls and the electrons bound to the field lines can be closest to their image charges. If the plasma is also offset radially from the center (as with an l=1 diocotron mode), then more density will accumulate at one end than the other. As the plasma revolves around the center, the electrons will slosh from one end …

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Multifragment Emission In The Reaction 36ar + 197au At E/A = 35, 50, 80, And 110 Mev, R. T. De Souza, L. Phair, D. R. Bowman, N. Carlin, C. K. Gelbke, W. G. Gong, Y. D. Yim, M. A. Lisa, W. G. Lynch, Graham F. Peaslee, M. B. Tsang, H. M. Tsang, H. M. Xu, F. Zhu, W. A. Friedman Oct 1991

Multifragment Emission In The Reaction 36ar + 197au At E/A = 35, 50, 80, And 110 Mev, R. T. De Souza, L. Phair, D. R. Bowman, N. Carlin, C. K. Gelbke, W. G. Gong, Y. D. Yim, M. A. Lisa, W. G. Lynch, Graham F. Peaslee, M. B. Tsang, H. M. Tsang, H. M. Xu, F. Zhu, W. A. Friedman

Faculty Publications

Multifragment emission in the reaction at has been measured with a low-threshold 4π detector array. Over this broad range of incident energies, the mean values and variances of the intermediate mass fragment (IMF: 3 ⩽ Z ⩽ 20) multiplicity distributions exhibit an approximate scaling with the total charged particle multiplicity. The measured multiplicities of light charged particles and intermediate mass fragments are compared with both a model involving statistical decay of an expanding compound nucleus, and with a model involving microscopic quasi-particle dynamics. The statistical decay model predictions are sensitive to the low-density nuclear equation of state.

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An Issue-Driven Strategy For Review Of Agency Decisions, Charles H. Koch Jr. Oct 1991

An Issue-Driven Strategy For Review Of Agency Decisions, Charles H. Koch Jr.

Faculty Publications

No abstract provided.

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The New Criminal Discovery Code In Oklahoma: A Two Way Street In The Wrong Direction, Rodney J. Uphoff Oct 1991

The New Criminal Discovery Code In Oklahoma: A Two Way Street In The Wrong Direction, Rodney J. Uphoff

Faculty Publications

This article first examines criminal discovery in Oklahoma prior to the Allen decision. Next, section II of the article explores Allen and the court’s justifications for creating a reciprocal discovery system. The article reviews the Allen procedures and similar pre-trial discovery provisions contained in the American Bar Association’s Standards for Criminal Justice and questions whether Allen’s new discovery system will achieve the desired results. Section II also focuses on the constitutionality of the defendant’s disclosure obligations and the adverse effects of mandating such disclosures on the adversary system. Finally, section III of the article proposes an alternative discovery code based …

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Bugs! Bugs! Bugs! Not Just For Children Anymore! Seeking A National Perspective, David L. Kulhavy Oct 1991

Bugs! Bugs! Bugs! Not Just For Children Anymore! Seeking A National Perspective, David L. Kulhavy

Faculty Publications

Insects as interpretive tools are an invaluable resource for the interpreter. There are many uses, from live insect displays to pinned specimens to the use of insects puppets in classrooms, conferences or other interpretive arenas. In this paper, the use of mealworms, the monarch butterfly as a candidate for our national insect, and the demonstration of insect locomotion are presented. The key to successful interpretation using insects is to encourage audience participation, exude enthusiasm, and promote the use of insects as an easy resource to acquire.

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And The Rebuttal, Glenn E. Coven Oct 1991

And The Rebuttal, Glenn E. Coven

Faculty Publications

No abstract provided.

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A Streetcar Named Desire: The Moth And The Lantern, Philip C. Kolin Oct 1991

A Streetcar Named Desire: The Moth And The Lantern, Philip C. Kolin

Faculty Publications

No abstract provided.

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Enhanced Evolutionary Pcr Using Oligonucleotides With Inosine At The 3′-Terminus, Mark A. Batzer, James E. Carlton, Prescott L. Deininger Sep 1991

Enhanced Evolutionary Pcr Using Oligonucleotides With Inosine At The 3′-Terminus, Mark A. Batzer, James E. Carlton, Prescott L. Deininger

Faculty Publications

No abstract provided.

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Effects Of Tidal Stage And Sun Angles On Intertidal Benthic Microalgal Productivity, James L. Pinckney, R. G. Zingmark Sep 1991

Effects Of Tidal Stage And Sun Angles On Intertidal Benthic Microalgal Productivity, James L. Pinckney, R. G. Zingmark

Faculty Publications

Motile benthic diatoms exhibit rhythmic vertical migrations that are influenced by tidal and light cycles. As a consequence of these periodic migrations, corresponding periodicities in benthic microalgal production should occur. Using oxygen microelectrodes, hourly measurements of microalgal production were obtained from subaerially exposed cores collected from low-intertidal muddy sediments in North Inlet estuary, South Carolina, USA Microalgal productivity at low tide was twice that at high tide (mean difference 52 %) and was significantly correlated with diurnal and tidal periodicities (r2 = 0.41; p < 0.0001). Production values ranged from 28.0 to 460.5 µmol O2 mg chl a-1 h-1 and maximum rates were achieved during mid-afternoon low …

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Multifragment Disintegration Of The Xe+Au System At E/A=50 Mev, D. R. Bowman, Graham F. Peaslee, R. T. De Souza, N. Carlin, C. K. Gelbke, W. G. Gong, Y. D. Yim, M. A. Lisa, W. G. Lynch, L. Phair, M. B. Tsang, C. Williams, C. Williams, N. Colonna, K. Hanold, M. A. Mcmahan, G. J. Wozniak, L. G. Moretto, W. A. Friedman Sep 1991

Multifragment Disintegration Of The Xe+Au System At E/A=50 Mev, D. R. Bowman, Graham F. Peaslee, R. T. De Souza, N. Carlin, C. K. Gelbke, W. G. Gong, Y. D. Yim, M. A. Lisa, W. G. Lynch, L. Phair, M. B. Tsang, C. Williams, C. Williams, N. Colonna, K. Hanold, M. A. Mcmahan, G. J. Wozniak, L. G. Moretto, W. A. Friedman

Faculty Publications

Multifragment disintegrations following Xe129+197Au collisions at E/A=50 MeV have been studied with a multidetector system covering 88% of 4π in solid angle. The average number of intermediate-mass fragments (Z=3–20) increases strongly as a function of charged-particle multiplicity and reaches values larger than six for the most violent collisions. The results are compared to calculations with both dynamical and statistical models.

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A Self-Organizing Binary Decision Tree For Incrementally Defined Rule-Based Systems, Douglas M. Campbell, Tony R. Martinez Sep 1991

A Self-Organizing Binary Decision Tree For Incrementally Defined Rule-Based Systems, Douglas M. Campbell, Tony R. Martinez

Faculty Publications

This paper presents an adaptive self-organizing concurrent system (ASOCS) model for massively parallel processing of incrementally defined rule systems in such areas as adaptive logic, robotics, logical inference, and dynamic control. An ASOCS is an adaptive network composed of many simple computing elements operating asynchronously and in parallel. This paper focuses on adaptive algorithm 3 (AA3) and details its architecture and learning algorithm. It has advantages over previous ASOCS models in simplicity, implementability, and cost. An ASOCS can operate in either a data processing mode or a learning mode. During the data processing mode, an ASOCS acts as a parallel …

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Case-Based Reasoning And Risk Assessment In Audit Judgment, Eric L. Denna, James V. Hansen, Rayman D. Meservy, Larry E. Wood Sep 1991

Case-Based Reasoning And Risk Assessment In Audit Judgment, Eric L. Denna, James V. Hansen, Rayman D. Meservy, Larry E. Wood

Faculty Publications

The purpose of this paper is to describe the results of an effort to utilize Case Based Reasoning (CBR) to model a specific audit judgment task. To date most efforts to develop computational models of audit judgment have used strictly rule-based representation methods. Some researchers have recently adopted more robust structures to model the auditor domain knowledge. Although these recent efforts to extend the representation methods appear to be more accurate descriptions of auditor reasoning and memory, they still lack a comprehensive. theory to guide the development of the model. A commonly encountered phenomenon in audit judgment is for an …

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Theoretical Aspects Of Intense Field Harmonic Generation, Anne L. Huillier, Kenneth J. Schafer, Kenneth C. Kulander Aug 1991

Theoretical Aspects Of Intense Field Harmonic Generation, Anne L. Huillier, Kenneth J. Schafer, Kenneth C. Kulander

Faculty Publications

We present theoretical studies of high-order harmonic generation in a rare-gas medium. The experimental results obtained at Saclay with a 1064 nm Nd-YAG laser in the 1013 W cm-2 intensity range are summarized. The harmonic emission strengths first decrease rather steeply for the first orders, then form a long plateau up to the 21st harmonic in xenon, or up to the 33rd harmonic in argon, before decreasing again rather abruptly. The theoretical description of these experiments consists first in the calculation of the photoemission spectra emitted by a single atom. The spectra are obtained by numerically integrating a time-dependent Schrôdinger …

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Ternary Paving Matroids, James G. Oxley Aug 1991

Ternary Paving Matroids, James G. Oxley

Faculty Publications

Acketa has determined all binary paving matroids. This paper specifies all ternary paving matroids. There are precisely four minor-maximal 3-connected such matroids: S(5, 6, 12), PG(2, 3), the real affine cube, and one other 8-element self-dual matroid. © 1991.

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A Molecular Blueprint For The Pore-Forming Structure Of Voltage-Gated Calcium Channels, Anne Grove, John M. Tomich, Mauricio Montal Aug 1991

A Molecular Blueprint For The Pore-Forming Structure Of Voltage-Gated Calcium Channels, Anne Grove, John M. Tomich, Mauricio Montal

Faculty Publications

A protein that imitates the sequence of a highly conserved segment predicted to line the pore of dihydropyridine-sensitive L-type calcium channels was designed and synthesized. Single-channel conductance properties were studied in planar lipid bilayers. The synthetic protein emulates the ionic conductance, ionic selectivity, and pharmacological properties of the authentic calcium channel, including the stereospecific action of agonist and antagonist enantiomers of the dihydropyridine BayK 8644. The identified sequence is identical in L-type calcium channels from skeletal muscle and isoforms of cardiac muscle, brain, and aorta. It is plausible that this structural motif represents the molecular blueprint for the pore-forming structure …

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Book Review: Turbulence In World Politics, James N. Rosenau, Harvey Starr Aug 1991

Book Review: Turbulence In World Politics, James N. Rosenau, Harvey Starr

Faculty Publications

No abstract provided.

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Non-Classical Derivation Of The Transport Theorems For Wave Fronts, R. Estrada, R. P. Kanwal Jul 1991

Non-Classical Derivation Of The Transport Theorems For Wave Fronts, R. Estrada, R. P. Kanwal

Faculty Publications

We establish a relationship between the derivatives of generalized functions and the transport theorems for moving surfaces of discontinuity. We study the motion of a propagating and deforming wave front which itself can have a moving discontinuity on its surface. With the help of the theory of generalized derivatives we present a general transport theorem which embodies the known results as special cases. © 1991.

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Evaluation Of Fill-Hole Completions, Andrew K. Wojtanowicz Jul 1991

Evaluation Of Fill-Hole Completions, Andrew K. Wojtanowicz

Faculty Publications

No abstract provided.

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Amplification Dynamics Of Human-Specific (Hs) Alu Family Members, Mark A. Batzer, Vandana A. Gudi, J. Carlos Mena, David W. Foltz, Rene J. Herrera, Prescott L. Deininger Jul 1991

Amplification Dynamics Of Human-Specific (Hs) Alu Family Members, Mark A. Batzer, Vandana A. Gudi, J. Carlos Mena, David W. Foltz, Rene J. Herrera, Prescott L. Deininger

Faculty Publications

We have investigated the distribution of several recently Inserted Alu family members within representatives of diverse human groups. Human population studies using 65 unrelated human DNA samples, as well as a familial study to test inheritance, showed that Individual Alu family members could be divided into three groups. The first group consisted of relatively older Alu family members which were monomorphic (homozygous) throughout the population tested (HS C3N1 and C4N6). The second group (HS C4N2, C4N5 and C4N8), apparently Inserted into other repetitive regions of the genome, resulting in inconclusive results in the PCR test used. However, it is clear …

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