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Mesostructure Of Photoluminescent Porous Silicon, David D. Allred, F. Ruiz, C. Vázquez-López, Jesus González-Hernández, G. Romero-Paredes, R. Peña-Sierra, G. Torres-Delgado Jul 1994

Mesostructure Of Photoluminescent Porous Silicon, David D. Allred, F. Ruiz, C. Vázquez-López, Jesus González-Hernández, G. Romero-Paredes, R. Peña-Sierra, G. Torres-Delgado

Faculty Publications

Scanning electron microscopy, atomic force microscopy, and Raman spectroscopy were used to characterize the microstructure of photoluminescent porous silicon (PS) layers formed by the anodic etching (HF:H2O:ethanol), at various current densities, of p-type (100) silicon wafers possessing resitivity in the range 1-2 Ω cm. Existing models for the origin of luminescence in PS are not supported by our observations. Cross-sectional as well as surface atomic force micrographs show the material to be clumpy rather than columnar; rodlike structures are not observed down to a scale of 40 nm. A three-dimensional model of the mesostructure of porous silicon is discussed. Room-temperature …

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Inversion Of Light Scattering Measurements For Particle Size And Optical Constants: Experimental Study, Matthew R. Jones, Keng H. Leong, M. Quinn Brewster, Bill P. Curry Jun 1994

Inversion Of Light Scattering Measurements For Particle Size And Optical Constants: Experimental Study, Matthew R. Jones, Keng H. Leong, M. Quinn Brewster, Bill P. Curry

Faculty Publications

Measurements of the light scattered by a sample contain information regarding the physical properties of the sample. Laser light-scattering measurements can be made unobtrusively in environments that are inaccessible to other types of measurements, so laser light-scattering techniques have become an important tool in aerosol research. The primary difficulty associated with using light-scattering techniques to determine aerosol particle properties is inverting the measurements or extracting the desired information from the measurements. In this study we use a 15-channel polar nephelometer to measure the light-scattering patterns of monodisperse polystyrene spheres. The light-scattering measurements are inverted, and the particle size distribution function …

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Inversion Of Light Scattering Measurements For Particle Size And Optical Constants: Theoretical Study, Matthew R. Jones, Bill P. Curry, M. Quinn Brewster, Keng H. Leong Jun 1994

Inversion Of Light Scattering Measurements For Particle Size And Optical Constants: Theoretical Study, Matthew R. Jones, Bill P. Curry, M. Quinn Brewster, Keng H. Leong

Faculty Publications

We invert the Fredholm equation representing the light scattered by a single spherical particle or a distribution of spherical particles to obtain the particle size distribution function and refractive index. We obtain the solution by expanding the distribution function as a linear combination of a set of orthonormal basis functions. The set of orthonormal basis functions is composed of Schmidt-Hilbert eigenfunctions and a set of supplemental basis functions, which have been orthogonalized with respect to the Schmidt-Hilbert eigenfunctions by using the Gram-Schmidt orthogonalization procedure. We use the orthogonality properties of the basis functions and of the eigenvectors of the kernel …

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Demonstration Of A Novel 3-D Autostereoscopic Display, M. W. Jones, Gregory P. Nordin, S. T. Kowel, J. H. Kulick, R. G. Lindquist, P. J. Nasiatka Jun 1994

Demonstration Of A Novel 3-D Autostereoscopic Display, M. W. Jones, Gregory P. Nordin, S. T. Kowel, J. H. Kulick, R. G. Lindquist, P. J. Nasiatka

Faculty Publications

We report what we believe is the first static implementation of the partial-pixel architecture, which provides a conceptual framework for the construction of real-time three-dimensional displays that are functionally equivalent to holographic stereograms (i.e., the simultaneous display of a series of stereoscopic images). The device is physically realized as a set of amplitude diffraction gratings on a chrome mask that was fabricated by standard photolithographic techniques. The intended three-dimensional object encoded in the display was strikingly visible on readout with an incoherent illumination source.

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A Reappraisal Of Diversification In The Federal Courts: Gender Effects In The Courts Of Appeals, Donald R. Songer, Sue Davis, Susan Haire May 1994

A Reappraisal Of Diversification In The Federal Courts: Gender Effects In The Courts Of Appeals, Donald R. Songer, Sue Davis, Susan Haire

Faculty Publications

Prior scholarship on the effect of the increasing number of female judges leads to three contrasting sets of expectations. Early writings and views of affirmative-action activists suggested that female judges would be more liberal than male judges. On the other hand, a series of empirical studies suggest that we should expect no gender differences. In contrast to both of these perspectives, several feminist scholars suggest that women will be more liberal only when that position expresses support for full participation in the community. These contrasting expectations were tested by analyzing the votes of appeals court decisions in three issue areas. …

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High Resolution Liquid Crystal Phase Grating Formed By Fringing Fields From Interdigitated Electrodes, Gregory P. Nordin, M. Friends, J. M. Jarem, S. T. Kowel, J. H. Kulick, T. Leslie, R. G. Lindquist May 1994

High Resolution Liquid Crystal Phase Grating Formed By Fringing Fields From Interdigitated Electrodes, Gregory P. Nordin, M. Friends, J. M. Jarem, S. T. Kowel, J. H. Kulick, T. Leslie, R. G. Lindquist

Faculty Publications

We report the formation of thin anisotropic phase gratings in a nematic liquid-crystalline film by use of lateral (fringing) electric fields induced by transparent interdigitated electrodes. These gratings yield high diffraction efficiency (>30%) with a strong dependence on the readout beam incidence angle. In addition, the formation of a defect wall is observed that has a significant effect on the diffraction properties of the phase grating.

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Humic And Fulvic Acids: Sink Or Source In The Availability Of Metals To The Marine Bivalves Macoma Balthica And Potamocorbula Amurensis?, Alan W. Decho, Samuel N. Luoma May 1994

Humic And Fulvic Acids: Sink Or Source In The Availability Of Metals To The Marine Bivalves Macoma Balthica And Potamocorbula Amurensis?, Alan W. Decho, Samuel N. Luoma

Faculty Publications

Humic acids (HA) and fulvic acids (FA) are common forms of organic matter in marine sediments, and are routinely ingested by deposit- and suspension-feeding animals. These compounds may be a sink for metals, implying that once metals are bound to humic substances they are no longer available to food webs. A series of experiments was conducted to quantitatively examine this premise using 2 estuarine bivalves from San Francisco Bay, USA: the suspension feeder Potarnocorbula arnurensis and the facultative deposit feeder Macoma balthica. HA and FA, isolated from marine sediments, were bound as organic coatings to either hydrous ferric oxides …

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England And The German Hanse, 1157-1611: A Study Of Their Trade And Commercial Diplomacy, Richard H. Bowers Apr 1994

England And The German Hanse, 1157-1611: A Study Of Their Trade And Commercial Diplomacy, Richard H. Bowers

Faculty Publications

No abstract provided.

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The Greek Minority Of Istanbul And Greek-Turkish Relations 1918-1974, By Alexis Alexandris, Gerasimos Augustinos Apr 1994

The Greek Minority Of Istanbul And Greek-Turkish Relations 1918-1974, By Alexis Alexandris, Gerasimos Augustinos

Faculty Publications

Reviews the book The Greek Minority of Istanbul and Greek-Turkish Relations 1918-1974, by Alexis Alexandris.

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History, He Wrote: Murder, Politics, And The Challenges Of Public History In A Community With A Secret, Robert R. Weyeneth Apr 1994

History, He Wrote: Murder, Politics, And The Challenges Of Public History In A Community With A Secret, Robert R. Weyeneth

Faculty Publications

No abstract provided.

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Characterization Of Electromagnetically Coupled Superquadric Loop Antennas For Mobile Communications Applications, Michael A. Jensen, Yahya Rahmat-Samii Apr 1994

Characterization Of Electromagnetically Coupled Superquadric Loop Antennas For Mobile Communications Applications, Michael A. Jensen, Yahya Rahmat-Samii

Faculty Publications

Analysis of two mutually coupled loop antennas with arbitrary relative orientation and position and possibly different geometries is presented. The antennas are represented by generalised superquadric curves, which include circular, elliptical, and rectangular loop geometries, and they may be located either in a homogeneous region or next to an infinite ground plane. A Galerkin-type moment method with piecewise sinusoidal subsectional basis and weighting functions is used. Special consideration is given to implement the solution using curved wire segments instead of the commonly employed linear segments to improve computational efficiency. This very general computational tool is used to investigate the behaviour …

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Investigating The Age Effects Of Family Structure On Adolescent Marijuana Use, John P. Hoffmann Apr 1994

Investigating The Age Effects Of Family Structure On Adolescent Marijuana Use, John P. Hoffmann

Faculty Publications

This study examines differences among older and younger adolescents in the influence of family structure, family relations, and peer relations on marijuana use. Data from a longitudinal sample of adolescents from the United States were stratified by age and used to assess these potential differences. Precise measures of family structure were constructed to account for the various manifestations of family forms. Multivariate analyses indicate that a recent divorce attenuates attachment among younger adolescents and leads to less family involvement among older adolescents. Moreover, older adolescents from stepparent families are less attached to their families. Changes in these family relationship variables …

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A Multi-Chip Module Implementation Of A Neural Network, Tony R. Martinez, George L. Rudolph, Linton G. Salmon, Matthew G. Stout Mar 1994

A Multi-Chip Module Implementation Of A Neural Network, Tony R. Martinez, George L. Rudolph, Linton G. Salmon, Matthew G. Stout

Faculty Publications

The requirement for dense interconnect in artificial neural network systems has led researchers to seek high-density interconnect technologies. This paper reports an implementation using multi-chip modules (MCMs) as the interconnect medium. The specific system described is a self-organizing, parallel, and dynamic learning model which requires a dense interconnect technology for effective implementation; this requirement is fulfilled by exploiting MCM technology. The ideas presented in this paper regarding an MCM implementation of artificial neural networks are versatile and can be adapted to apply to other neural network and connectionist models.

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Gift Of Life: The Lawyer's Role In Organ And Tissue Donation, David M. English Mar 1994

Gift Of Life: The Lawyer's Role In Organ And Tissue Donation, David M. English

Faculty Publications

At its 1992 Midyear Meeting, the ABA House of Delegates approved a resolution recommending that individual lawyers and the organized bar play an active role in efforts to relieve the current shortage of donated organs and tissue. When fully implemented, these efforts will involve not only lawyers, but also their clients, health care professionals and the general public. The resolution's most ambitious goal is to make organ and tissue donation part of everyday law practice. Lawyers, as a matter of course, should raise the subject of organ and tissue donation when counselling clients on personal planning. But to educate their …

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The Herpes Simplex Virus Thymidine Kinase Gene As A Conditional Negative-Selection Marker Gene In Arabidopsis Thaliana, Mihály Czakó, László Márton Mar 1994

The Herpes Simplex Virus Thymidine Kinase Gene As A Conditional Negative-Selection Marker Gene In Arabidopsis Thaliana, Mihály Czakó, László Márton

Faculty Publications

The human herpes simplex virus thymidine kinase type 1 gene (HSVtk) acts as a conditional lethal marker in mammalian cells. The HSVtk-encoded enzyme is able to phosphorylate certain nucleoside analogs (e.g. ganciclovir, an antiherpetic drug), thus converting them to toxic DNA replication inhibitors. The utility of HSVtk as a conditional negative-selection marker was explored in Arabidopsis thaliana (L.) Heynh. HSVtk was introduced into Arabidopsis by Agrobaderium-mediated transformation. Transgenic plants were morphologically indistinguishable from wild type and exhibited normal fertility. Canciclovir at lO-5to 10-4 M drastically reduced shoot regeneration on transgenic, HSVtk* root explants …

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Morality And American Foreign Policy By Robert W. Mcelroy Traditions And Values In Politics And Diplomacy By Kenneth W. Thompson, William P. Kreml Mar 1994

Morality And American Foreign Policy By Robert W. Mcelroy Traditions And Values In Politics And Diplomacy By Kenneth W. Thompson, William P. Kreml

Faculty Publications

No abstract provided.

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Predicate Union And The Syntax Of Japanese Causatives, Stanley Dubinsky Mar 1994

Predicate Union And The Syntax Of Japanese Causatives, Stanley Dubinsky

Faculty Publications

This paper presents a monoclausal, multipredicate analysis of Japanese causatives, adopting the fundamental assumptions of Relational Grammar. Evidence is provided for the existence of two distinct classes of causatives, distinguished on the basis of the agentivity of the matrix subject. It is also demonstrated that the surface case marking of the causee is constrained by its relative status to the matrix subject with respect to a set of Proto-Agent entailments (as proposed in Dowty 1991).

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Religious Devoutness, Impression Management, And Personality Functioning In College Students, P. Scott Richards Mar 1994

Religious Devoutness, Impression Management, And Personality Functioning In College Students, P. Scott Richards

Faculty Publications

Measures of religious devoutness, impression management, and personality adjustment were administered to 178 undergraduate students. Pearson correlations were computed. Greater devoutness (intrinsic religiousness) was associated with more religious and existential well-being, self-control, and social desirability, and with less self-monitoring. Consistent with previous research, the weak positive relation between religious devoutness and social desirability did not generalize to other impression management measures. Evidence which suggests that the relation between religious devoutness and social desirability may be an artifact of religious bias was discussed.

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Vegetation Studies Of The Amazon Basin Using Enhanced Resolution Seasat Scatterometer Data, David G. Long, Perry J. Hardin, Peter T. Whiting Mar 1994

Vegetation Studies Of The Amazon Basin Using Enhanced Resolution Seasat Scatterometer Data, David G. Long, Perry J. Hardin, Peter T. Whiting

Faculty Publications

The Seasat-A scatterometer (SASS) was designed to measure the near-surface wind field over the ocean by inferring the wind from measurements of the surface radar backscatter. While backscatter measurements were also made over land, they have been primarily used for the calibration of the instrument. This has been due in part to the low resolution of the scatterometer measurements (nominally 50 km). In a separate paper the present authors introduced a new method for generating enhanced resolution radar measurements of the Earth's surface using spaceborne scatterometry. In the present paper, the method is used with SASS data to study vegetation …

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Proof Of Correctness For Asocs Aa3 Networks, J. Cory Barker, Tony R. Martinez Mar 1994

Proof Of Correctness For Asocs Aa3 Networks, J. Cory Barker, Tony R. Martinez

Faculty Publications

This paper analyzes adaptive algorithm 3 (AA3) of adaptive self-organizing concurrent systems (ASOCS) and proves that AA3 correctly fulfills the rules presented. Several different models for ASOCS have been developed. AA3 uses a distributed mechanism for implementing rules so correctness is not obvious. An ASOCS is an adaptive network composed of many simple computing elements operating in parallel. An ASOCS operates in one of two modes: learning and processing. In learning mode, rules are presented to the ASOCS and incorporated in a self-organizing fashion. In processing mode, the ASOCS acts as a parallel hardware circuit that performs the function defined …

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Columbian Consequences, Vol 3: The Spanish Borderlands In Pan-American Perspective, By David Hurst Thomas, Michael C. Scardaville Feb 1994

Columbian Consequences, Vol 3: The Spanish Borderlands In Pan-American Perspective, By David Hurst Thomas, Michael C. Scardaville

Faculty Publications

A review of Columbian Consequences, Vol 3: The Spanish Borderlands in Pan-American Perspective, by David Hurst Thomas

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The Burden Of Dependency: Colonial Themes In Southern Economic Thought, By Joseph J. Persky, Lacy K. Ford, Jr. Feb 1994

The Burden Of Dependency: Colonial Themes In Southern Economic Thought, By Joseph J. Persky, Lacy K. Ford, Jr.

Faculty Publications

A review of The Burden of Dependency: Colonial Themes in Southern Economic Thought, by Joseph J. Persky

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Epistemic Decision Theory Applied To Multiple-Target Tracking, Wynn C. Stirling, T. K. Moon, S. E. Budge, J. B. Thompson Feb 1994

Epistemic Decision Theory Applied To Multiple-Target Tracking, Wynn C. Stirling, T. K. Moon, S. E. Budge, J. B. Thompson

Faculty Publications

A decision philosophy that seeks the avoidance of error by trading off belief of truth and value of information is applied to the problem of recognizing tracks from multiple targets (MTT). A successful MTT methodology should be robust in that its performance degrades gracefully as the conditions of the collection become less favorable to optimal operation. By stressing the avoidance, rather than the explicit minimization, of error, the authors obtain a decision rule for trajectory-data association that does not require the resolution of all conflicting hypotheses when the database does not contain sufficient information to do so reliably. This rule, …

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Electromagnetic Characteristics Of Superquadric Wire Loop Antennas, Michael A. Jensen, Yahya Rahmat-Samii Feb 1994

Electromagnetic Characteristics Of Superquadric Wire Loop Antennas, Michael A. Jensen, Yahya Rahmat-Samii

Faculty Publications

The analysis of antenna configurations in the form of a generalized superquadric loop, which includes circular, elliptical and rectangular loop geometries, is presented in this paper. Use of a Galerkin form of the moment method with piecewise sinusoidal subsectional basis and testing functions provides rapid numerical convergence and accurate representation of the antenna current. A convenient parametric representation for the superquadric curve is developed to allow a subsectional formulation using curved wire segments, rather than the commonly employed piecewise linear segments, to construct the geometry. Both magnetic frill and delta gap source models are implemented to allow a detailed study …

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So What's New In The New Basals? A Focus On First Grade, James V. Hoffman, Sarah J. Mccarthey, Judy A. Abbott, Cheryl Christian, Laura Corman, Catherine Curry, Mark Dressman, Bonnie Elliot, Debra Maherne, Debra Stahle Jan 1994

So What's New In The New Basals? A Focus On First Grade, James V. Hoffman, Sarah J. Mccarthey, Judy A. Abbott, Cheryl Christian, Laura Corman, Catherine Curry, Mark Dressman, Bonnie Elliot, Debra Maherne, Debra Stahle

Faculty Publications

The authors examine the first grade materials in five new basal programs submitted for the 1993 Texas state adoption. These series are compared with program materials currently in use in the state (Copyright 1986/1987). The analysis focuses on features of the pupil texts(e.g., total number of words, number of unique words, readability levels, literary quality) and features of the teachers' editions (e.g., program design, organization, tone). Results of the analysis indicate substantial changes in the more recent series.The findings are interpreted in terms of historical trends as well as recent developments in the literature-based and whole language movements.Implications for future …

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Foreword: Do We Really Want To Know The Defendant?, Dale A. Nance Jan 1994

Foreword: Do We Really Want To Know The Defendant?, Dale A. Nance

Faculty Publications

Forward to the Symposium on the Admission of Prior Offense Evidence in Sexual Assualt Cases, Chicago, Illinois, 1994.

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Torts-- Federal Preemption Of State Common Law-- Federal Cigarette Labeling & Advertising Act, Elizabeth Price Foley, Elizabeth C. Price Jan 1994

Torts-- Federal Preemption Of State Common Law-- Federal Cigarette Labeling & Advertising Act, Elizabeth Price Foley, Elizabeth C. Price

Faculty Publications

This case note examining Supreme Court's landmark preemption decision in Cipollone v. Liggett Group.

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The Eleventh Circuit’S First Decade Contribution To The Law Of The Nation, 1981-1991, Thomas E. Baker Jan 1994

The Eleventh Circuit’S First Decade Contribution To The Law Of The Nation, 1981-1991, Thomas E. Baker

Faculty Publications

Likewise, the task of commentary is difficult. The period covered here-the first decade of the Eleventh Circuit-represents, quite literally and figuratively, the formative era of the court. Indeed, the volume of decisions and their variety are qualities that ought to humble, if not intimidate, most commentators. Justice Holmes once observed that a common law court could be expected to replicate the entire corpus juris in the space of a single generation. The Eleventh Circuit did this consciously between 1981 and 1991. In Bonner v. City of Prichard, the inaugural en banc court held that the new court-just cleaved from the …

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A Reasoned Interlingua For Knowledge-Based Machine Translation, Deryle W. Lonsdale, John R. R. Leavitt, Alexander M. Franz Jan 1994

A Reasoned Interlingua For Knowledge-Based Machine Translation, Deryle W. Lonsdale, John R. R. Leavitt, Alexander M. Franz

Faculty Publications

Research in machine translation (MT) has resulted in a number of Machine Translation systems that are based on the interlingua approach. This paper reports the results of designing an interlingua for a large-scale, practical MT system designed to translate technical information from English into a number of target languages. After an analysis of the main features of the translation problem faced by this system we describe the principles underlying our design decisions. We address issues such as the design and development methodology, the grain size of the representation, and our efforts to endow the interlingua representation with the ability to …

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The Hidden Ball: A Substantive Critique Of Baseball Metaphors In Judicial Opinions, Chad M. Oldfather Jan 1994

The Hidden Ball: A Substantive Critique Of Baseball Metaphors In Judicial Opinions, Chad M. Oldfather

Faculty Publications

This article draws on literary and linguistic theory, as well as prior work studying the effects of metaphor in judicial opinions, to study the use of a specific type of metaphor - baseball metaphors - in judicial opinions. The article surveys several specific metaphors that have been recurrently used - including the judge as "umpire," "hit-and-run," and "three strikes and you're out" - and considers the ways in which the use of such metaphors might direct thought about the underlying subject matter in inappropriate directions.

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