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A Note On The Non-Spanning Circuits Of A Matroid, James Oxley, Geoff Whittle Jan 1991

A Note On The Non-Spanning Circuits Of A Matroid, James Oxley, Geoff Whittle

Faculty Publications

In this note we determine when a collection of subsets of a set E is the set of non-spanning circuits of a matroid on E. This result is then used to characterize when a matroid on E is uniquely determined by its set of non-spanning circuits. © 1991, Academic Press Limited. All rights reserved.


D-Harmonic Distributions And Global Hypoellipticity On Nilmanifolds, Jacek M. Cygan, Leonard F. Richardson Jan 1991

D-Harmonic Distributions And Global Hypoellipticity On Nilmanifolds, Jacek M. Cygan, Leonard F. Richardson

Faculty Publications

Let M = Γ\N be a compact nilmanifold. A system of differential operators D1, …, Dk on M is globally hypoelliptic (GH) if when D1f = g1,…, Dkf=gk with f ∈ D’ (M), g1, …, gk ∈ C∞ (M) then f ∈ C∞ (M). Let X1, …, Xk be real vector fields on M induced by the Lie algebra N of N. We study the relationships between (GH) of the system X1, …, Xk on M, (GH) of the operator D = X12 + … + Xk2, the constancy of D-harmonic distributions on M, and related algebraic conditions on X1, …


Distributional Solutions Of The Wiener-Hopf Integral And Integro-Differential Equations, R. Estrada, R. P. Kanwal Jan 1991

Distributional Solutions Of The Wiener-Hopf Integral And Integro-Differential Equations, R. Estrada, R. P. Kanwal

Faculty Publications

We present the theory and technique for obtaining the distributional solutions for the Wiener-Hopf integral and integro-differential equations. This is achieved by identifying a class of kernels for which these equations are well defined and are of the Fredholm type. Consequently, the associated operators and their images are of finite dimensions. Furthermore, we define the operators in such a way that the corresponding equations hold at the end points; otherwise, the equations are usually ill-behaved. We illustrate our analysis with the help of various examples. © 1991, Rocky Mountain Mathematics Consortium. All Rights Reserved.


Sensitivity Of Frost Resistance And Growth In Citrus And Avocado To Chronic Ozone Exposure, D. M. Eissenstat, J. P. Syvertsen, T. J. Dean, G. Yelenosky, J. D. Johnson Jan 1991

Sensitivity Of Frost Resistance And Growth In Citrus And Avocado To Chronic Ozone Exposure, D. M. Eissenstat, J. P. Syvertsen, T. J. Dean, G. Yelenosky, J. D. Johnson

Faculty Publications

The effects of elevated levels of ozone on growth and frost resistance were studied using broadleaf‐evergreen citrus and avocado trees. ‘Ruby Red’ grapefruit (Citrus parodist L.) trees on either Volkamer lemon (Citrus volkanieriana Ten. & Pasq.) or sour orange (Citrus aurantium L.) rootstocks and ‘Simmonds’ or ‘Pancho’ avocado trees (Persea americana Mill.) on the rootstock ‘Waldin’ were exposed to ozone in open‐top chambers for 4 months in 1988 and for 8 months in a second experiment in 1989. The ambient ozone concentration, averaged over a 12 h day, was 30‐1 nl 1−1 in 1988 and 39‐1 nl 1−1 in 1989 …


Computer-Simulated Evaluation Of Possible Mechanisms For Quenching Heavy Metal Ion Activity In Plant Vacuoles: I. Cadmium, Jian Wang, Bill P. Evangelou, Mark T. Nielsen, George J. Wagner Jan 1991

Computer-Simulated Evaluation Of Possible Mechanisms For Quenching Heavy Metal Ion Activity In Plant Vacuoles: I. Cadmium, Jian Wang, Bill P. Evangelou, Mark T. Nielsen, George J. Wagner

Faculty Publications

Various mechanisms have been suggested for the quenching of Cd ion activity in plant vacuoles. These include solution complexation with organic acids and sulfhydryl-containing peptides and precipitation as sulfides. Because direct experimental support for these mechanisms is lacking and difficult to obtain, we have used a computer model to evaluate the quenching role of possible organic and inorganic ligands of tobacco cultured cells exposed to Cd. Results of this thermodynamic evaluation, which assumes that a chemical equilibrium state is met in the vacuole, support the conclusion that sulfhydryl-containing peptides and certain organic acids may form soluble Cd complexes. Although complexation …


Evaluating Acrosome Interference Contrast Reaction Steps With Brightfield And Differential Microscopy Techniques, H. C. Steinholt, J. E. Chandler, V. Tirado Jan 1991

Evaluating Acrosome Interference Contrast Reaction Steps With Brightfield And Differential Microscopy Techniques, H. C. Steinholt, J. E. Chandler, V. Tirado

Faculty Publications

Acrosomal integrity of bovine spermatozoa was evaluated using naphthol yellow S-erythrosine B stain with bright field microscopy, .2% glutaraldehyde fixation with Nomarski optics, and live wet smears with Nomarski optics to compare the evaluation techniques. Four ejaculates per two Holstein bulls were enriched through a Percoll gradient, capacitated with heparin, and acrosome-reacted with lysophosphatidylcholine to prepare spermatozoa for in vitro fertilization. Spermatozoa samples were taken after each preparatory step, and percentage of intact acrosomes was evaluated with the stain, .2% glutaraldehyde, and live wet smear. Acrosomal integrity decreased with each preparatory step across all techniques. The decrease in integrity from …


Threshold Photodetachment Of H-, K. R. Lykke, K. K. Murray, W. C. Lineberger Jan 1991

Threshold Photodetachment Of H-, K. R. Lykke, K. K. Murray, W. C. Lineberger

Faculty Publications

The electron affinities of atomic hydrogen and deuterium have been determined by tunable-laser threshold-photodetachment spectroscopy: the electron affinities of H (F=0) and D (F=1/2) are 6082.990.15 and 6086.20.6 cm-1, respectively. The value for H is a 20-fold improvement over previous experimental determinations. © 1991 The American Physical Society.


A Monte Carlo Study Of Rainfall Sampling Effect On A Distributed Catchment Model, Witold F. Krajewski, Venkataraman Lakshmi, Konstantine P. Georgakakos, Subhash C. Jain Jan 1991

A Monte Carlo Study Of Rainfall Sampling Effect On A Distributed Catchment Model, Witold F. Krajewski, Venkataraman Lakshmi, Konstantine P. Georgakakos, Subhash C. Jain

Faculty Publications

A Monte Carlo study of a physically based distributed-parameter hydrologic model is described. The catchment model simulates overland flow and streamflow, and it is based on the kinematic wave concept. Soil Conservation Service curves are used to model rainfall excess within the basin. The model was applied to the Ralston Creek watershed, a small (7.5 km2) rural catchment in eastern Iowa. Sensitivity of the model response with respect to rainfall-input spatial and temporal sampling density was investigated. The input data were generated by a space-time stochastic model of rainfall. The generated rainfall fields were sampled by the varied-density …


Private Market Solutions To The Savings And Loan Crisis: Bank Holding Company Acquisitions Of Savings Associations, Lissa Lamkin Broome Jan 1991

Private Market Solutions To The Savings And Loan Crisis: Bank Holding Company Acquisitions Of Savings Associations, Lissa Lamkin Broome

Faculty Publications

No abstract provided.


United States V. Chestman -- Trading In Securities On The Basis Of Nonpublic Information In Advance Of A Tender Offer, Thomas Lee Hazen Jan 1991

United States V. Chestman -- Trading In Securities On The Basis Of Nonpublic Information In Advance Of A Tender Offer, Thomas Lee Hazen

Faculty Publications

No abstract provided.


Accutane: Has Drug Regulation In The United States Reached Its Limits?, Joan H. Krause Jan 1991

Accutane: Has Drug Regulation In The United States Reached Its Limits?, Joan H. Krause

Faculty Publications

No abstract provided.


The Concept Of Offensiveness In Establishment And Free Exercise Jurisprudence, William P. Marshall Jan 1991

The Concept Of Offensiveness In Establishment And Free Exercise Jurisprudence, William P. Marshall

Faculty Publications

No abstract provided.


Competing In Global Product Innovation: Is Antitrust Immunity Necessary?, George J. Alexander Jan 1991

Competing In Global Product Innovation: Is Antitrust Immunity Necessary?, George J. Alexander

Faculty Publications

No abstract provided.


Feminist Legal Scholarship, Patricia A. Cain Jan 1991

Feminist Legal Scholarship, Patricia A. Cain

Faculty Publications

No abstract provided.


Race And The Dominant Gaze: Narratives Of Law And Inequality In Popular Film, Margaret M. Russell Jan 1991

Race And The Dominant Gaze: Narratives Of Law And Inequality In Popular Film, Margaret M. Russell

Faculty Publications

No abstract provided.


Entering Great America: Reflections On Race And The Convergence Of Progressive Legal Theory And Practice, Margaret M. Russell Jan 1991

Entering Great America: Reflections On Race And The Convergence Of Progressive Legal Theory And Practice, Margaret M. Russell

Faculty Publications

No abstract provided.


Diversity And Equal Protection In The Marketplace: The Metro Broadcasting Case In Context, Allen S. Hammond Iv Jan 1991

Diversity And Equal Protection In The Marketplace: The Metro Broadcasting Case In Context, Allen S. Hammond Iv

Faculty Publications

No abstract provided.


Federal Sentencing Guidelines: A Cure Worse Than The Disease, Gerald F. Uelmen Jan 1991

Federal Sentencing Guidelines: A Cure Worse Than The Disease, Gerald F. Uelmen

Faculty Publications

No abstract provided.


Obscuring The Importance Of Race: The Implication Of Making Comparisons Between Racism And Sexism (Or Other -Isms), Stephanie M. Wildman, Trina Grillo Jan 1991

Obscuring The Importance Of Race: The Implication Of Making Comparisons Between Racism And Sexism (Or Other -Isms), Stephanie M. Wildman, Trina Grillo

Faculty Publications

No abstract provided.


Drawing The Appropriate Statute Of Limitations In Implied Causes Of Action Under Rule 10b-5: A General Framework Of Familiar Legal Principles, Donald J. Polden Jan 1991

Drawing The Appropriate Statute Of Limitations In Implied Causes Of Action Under Rule 10b-5: A General Framework Of Familiar Legal Principles, Donald J. Polden

Faculty Publications

No abstract provided.


Sex, Drugs, Pregnancy, And The Law: Rethinking The Problems Of Pregnant Women Who Use Drugs, Michelle Oberman Jan 1991

Sex, Drugs, Pregnancy, And The Law: Rethinking The Problems Of Pregnant Women Who Use Drugs, Michelle Oberman

Faculty Publications

No abstract provided.


Impossibility, Subjective Probability And Punishment For Attempts, David D. Friedman Jan 1991

Impossibility, Subjective Probability And Punishment For Attempts, David D. Friedman

Faculty Publications

No abstract provided.


Criminal Law--International Jurisdiction--Federal Child Pornography Statute Applies To Extraterritorial Acts, United States V. Thomas, 893 F.2d 1066 (9th Cir. 1990), Sandee Magliozzi Jan 1991

Criminal Law--International Jurisdiction--Federal Child Pornography Statute Applies To Extraterritorial Acts, United States V. Thomas, 893 F.2d 1066 (9th Cir. 1990), Sandee Magliozzi

Faculty Publications

No abstract provided.


Choosing Justice, Howard C. Anawalt Jan 1991

Choosing Justice, Howard C. Anawalt

Faculty Publications

No abstract provided.


Senior Faculty Attitudes Toward Retirement, David Day, Thomas Langham, Suzan Pearson Jan 1991

Senior Faculty Attitudes Toward Retirement, David Day, Thomas Langham, Suzan Pearson

Faculty Publications

No abstract provided.


The "Assaultive Jurisprudence": The Free Speech Critique Of Robert Nagle’S Constitutional Cultures, David Day Jan 1991

The "Assaultive Jurisprudence": The Free Speech Critique Of Robert Nagle’S Constitutional Cultures, David Day

Faculty Publications

No abstract provided.


The Reservation As Place: A South Dakota Essay, Frank Pommersheim Jan 1991

The Reservation As Place: A South Dakota Essay, Frank Pommersheim

Faculty Publications

No abstract provided.


Tribal-State Relations: Hope For The Future?, Frank Pommersheim Jan 1991

Tribal-State Relations: Hope For The Future?, Frank Pommersheim

Faculty Publications

No abstract provided.


Churches And The Courts: The First Amendment Protection From Clergy Lawsuits, Patrick Garry Jan 1991

Churches And The Courts: The First Amendment Protection From Clergy Lawsuits, Patrick Garry

Faculty Publications

No abstract provided.


Discovery Standards For The Testimonial Expert Under Federal Rule Of Civil Procedure 26(B)(4)(A): A Twentieth Anniversary Assessment, David Day Jan 1991

Discovery Standards For The Testimonial Expert Under Federal Rule Of Civil Procedure 26(B)(4)(A): A Twentieth Anniversary Assessment, David Day

Faculty Publications

No abstract provided.