Digital Commons Network^™

Raman Spectroscopic Study Of The Formation Of T-Mosi2 From Mo/Si Multilayers, Ming Cai, David D. Allred, A. Reyes-Mena

Faculty Publications

We have used Raman spectroscopy, large- and small-angle x-ray diffraction spectroscopy of sputter-deposited, vacuum-annealed, soft x-ray Mo/Si thin-film multilayers to study the physics of silicide formation. Two sets of multilayer samples with d-spacing 8.4 and 2.0 nm have been studied. Annealing at temperatures above 800 °C causes a gradual formation of amorphous MoSi2 interfaces between the Si and Mo layers. The transition from amorphous to crystalline MoSi2 is abrupt. The experimental results indicate that nucleation is the dominant process for the early stage and crystallization is the dominant process after nucleation is well advanced. In the thicker multilayer, a portion …

Emitted Current Instability From Silicon Field Emission Emitters Due To Sputtering By Residual Gas Ions, W.I. Karain, Larry V. Knight, David D. Allred, A. Reyes-Mena

Faculty Publications

We have fabricated arrays of silicon field emitters using semiconductor lithography techniques. The density of the tips was 10^5/cm^2. The maximum current that can be extracted from each emitter is limited by resistive heating. We have investigated how the electron current emitted changes under constant applied voltage. We found that the current is very sensitive to the vacuum conditions. We attribute this to sputtering of the emitters due to ionized residual gas molecules. The poorer the vacuum, the higher the instability in the current. We studied this phenomenon at 10^6 and 10-x Torr. The model of two concentric spherical shells …

Cloning And Functional Characterization Of Lcr-F1: A Bzip Transcription Factor That Activates Erythroid-Specific, Human Globin Gene Expression, John J. Caterina, David Donze, Chiao Wang Sun, Dominic J. Ciavatta, Tim M. Townes

Faculty Publications

DNase I hypersensitive site 2 (HS 2) of the human β-globin Locus Control Region (LCR) directs high level expression of the β-globin gene located 50 kilobases downstream. Experiments in cultured cells and in transgenic mice demonstrate that duplicated AP1-like sites in HS 2 are required for this powerful enhancer activity. A cDNA clone encoding a basic, leucine-zipper protein that binds to these sites was isolated and designated Locus Control Region-Factor 1 (LCR-F1). This protein is a member of a new family of regulatory factors that contain a 63 amino acid 'CNC domain' overlapping the basic region. This domain is approximately …

Flows, Congruences, And Factorizations, Jimmie Lawson, Amha Lisan

Faculty Publications

In this paper we study connections between flows and left congruences on the universal flow. It is shown that in the case of minimal flows such congruences admit a factorization in which the factors correspond to distal and proximal properties of the flow. © 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 …

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 …

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.

National Defense And The Public-Goods Problem, Jeffrey Rogers Hummel, Don Lavoie

Faculty Publications

No abstract provided.

The Japanese Cooperative Sector, Mark A. Klinedinst, Hitomi Sato

Faculty Publications

No abstract provided.

The Peace Of Passover, Richard M. Davidson

Faculty Publications

No abstract provided.

Activity And Distribution Of Attached Bacteria In Chesapeake Bay, Peter Griffith, Fuh-Kwo Shiah, Kathryn Gloersen, Hugh W. Ducklow, Madilyn Fletcher

Faculty Publications

The purpose of this study was to further our understanding of the role of particle-associated bacteria in phytoplankton degradation in the Chesapeake Bay, USA, and to identify environmental parameters that control production by free and particle-associated bacteria. Surface and bottom waters at 10 stations along the length of the Bay were sampled over a 2 yr period. Samples were analyzed for temperature, salinity, chlorophyll, phaeophytin, particulate protein, thymidine incorporation (an estimate of bacterial growth rate), and bacterial total direct counts. Results demonstrated that freeliving bacteria were responsible for most of the total bacterial production, which was correlated with temperature and …

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. …

Data Assimilation And Model Evaluation Experiment Datasets, Chung-Chieng A. Lai, Wen Qian, Scott M. Glenn

Faculty Publications

The Institute for Naval Oceanography, in cooperation with Naval Research Laboratories and universities, executed the Data Assimilation and Model Evaluation Expertiment (DAMÉE) for the Gulf Stream region during fiscal years 1991-1993. Enormous effort has gone into the preparation of several high-quality and consistent datasets for model initialization and verification. This paper describes the preparation process, the temporal and spatial scopes, the contents, the structure, etc., of these datasets.

The goal of DAMÉE and the need of data for the four phases of experiment are briefly states. The preparation of DAMÉE datasets consisited of a series of processes: 1) collection of …

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 …

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.

Rodent Bc1 Rna Gene As A Master Gene For Id Element Amplification, Joomyeong Kim, John A. Martignetti, M. Richard Shen, Jürgen Brosius, Prescott Deininger

Faculty Publications

ID elements are short interspersed repetitive DNA elements (SINEs) which have amplified in rodent genomes via retroposition, a process involving an RNA intermediate. BC1, an abundant ID-related transcript, is transcribed from a conserved, single-copy gene in rodents. The gene encoding BC1 RNA represents one of the earliest and possibly the first ID-containing sequence. Comparison of consensus sequences of each rodent ID with its corresponding BC1 RNA gene showed that the variations of BC1 RNA within rodents corresponded to specific changes within the ID consensus sequence for each rodent species. This supports the hypothesis that the BC1 gene is a master …

Coastal Eutrophication Near The Mississippi River Delta, R. Eugene Turner, Nancy Rabalais

Faculty Publications

CHANGES in delivery of river-borne nutrients such as dissolved phosphate, nitrate and silicate, owing to land-use changes and anthropogenic emissions, are known to result in eutrophication1— enhanced phytoplankton blooms—and more severe hypoxic events2–1 in many enclosed bays and seas. Although similar ecological effects might be expected on continental shelves, the occurrence of such eutrophication has remained unresolved5. Here we present evidence of eutrophication of the continental shelf near the outflow of the Mississippi river, obtained by quantifying biologically bound silica (BSi) in diatom remnants within dated sediment cores. BSi accumulation rates are greatest in water depths of 20 to 50 …

Partnership Profits Share For Services: An Aggregate Exegesis Of Revenue Procedure 93-27 (Part 2), John W. Lee

Faculty Publications

In this article, Professor Lee charts two alternative methods for implementing an aggregate solution to the problem of partnership profits share for services. The functional, or judicial, method is to handle (1) the exchange of partner-capacity services for a profit share subject to the risk f the venture with the Culbertson "common law relation of partnership," nonrealization event doctrine, implicitly contemplated by the 1984 legislative history to section 707(a)(2), (2) the classic Diamond transitory partner with a substance-over-form rule or step-transaction rule, and (3) a sale of the partnership interest in circumstances that would result in ordinary income in a …

Preaching From The Book Of Genesis, Mark A. Throntveit

Faculty Publications

No abstract provided.

The Case Of A Lifetime, Richard C. Reuben

Faculty Publications

There is great difficulty in defining pro bono lawyering. The classic model is the practitioner who devotes time to representing a client in a civil or criminal matter. But some consider other legal relationships pro bono as well, such as service on the boards of directors of nonprofit organizations, legal work at reduced fees, and activities that improve the law and legal profession. In the case of organizations such as the ACLU and the NAACP LDF, pro bono means a mixture of much of the above, as public interest law firms work hand in hand with private lawyers and firms …

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

Faculty Publications

No abstract provided.

Defense Contractor Buyer-Seller Relationships: Theoretical Approaches, Carl R. Templin

Faculty Publications

This article examines the applicability of three theoretical approaches to defining defense buyer-seller relationships. Economic Free-Market Theory explains the relative economic power of the participants but ignores the legal, political, and socioeconomic aspects so pervasive in defense acquisitions. Transaction Cost Economics provides a framework for determining the most cost-effective type of contract governance for each transaction. Systems theory explores the degree of interdependence between the buyers and sellers systems. Each theory contributes unique insights into defense buyer-seller relationships that can be used to judge the appropriateness of contracting laws, regulations, policies, and management approaches for specific acquisition environments.

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 …

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 …

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.

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.

Interest Balancing And Other Limits To Judicially Managed Equal Educational Opportunity, Neal Devins

Faculty Publications

No abstract provided.

Ain't?, Susan Grover

Faculty Publications

No abstract provided.

The Aqedah At The "Crossroad": Its Significance In The Jewish-Christian-Muslim Dialogue, Jacques R. Doukhan

Faculty Publications

No abstract provided.

Absence Of Size Dependence Of The Kondo Resistivity, V. Chandrasekhar, P. Santhanam, N. A. Penebre, Richard A. Webb, H. Vloeberghs, C. Van Haesendonck, Y. Bruynseraede

Faculty Publications

We have measured the low temperature resistivity of AuFe wires in the dilute magnetic impurity limit as a function of wire width, temperature, and magnetic field. When the width dependence of the electron-electron interaction contribution to the resistivity is taken into account, the temperature dependence of the remaining Kondo contribution to the resistivity of all samples with the same impurity concentration is identical. Similar behavior is observed for the magnetic field dependent resistivity. Thus, the Kondo contribution to the resistivity is independent of width down to 38 nm, much smaller than the Kondo length ξ_K=ħv_F/k_{B …}