Digital Commons Network^™

Knot Theory And The Dynamics Of Quantum General Relativity, Rodolfo Gambini, Jorge Pullin

Faculty Publications

We propose to interpret the action of the quantum Hamiltonian constraint of general relativity in the loop representation as a skein relation on the space of knots. Therefore, by considering knot polynomials that are compatible with that skein relation, one guarantees that all the quantum Einstein equations are solved. We give a particular example of such an invariant and discuss the consistency of the constraint algebra in this approach. © 1996 IOP Publishing Ltd.

Second-Order Perturbations Of A Schwarzschild Black Hole, Reinaldo J. Gleiser, Carlos O. Nicasio, Richard H. Price, Jorge Pullin

Faculty Publications

We study the even-parity ℓ = 2 perturbations of a Schwarzschild black hole to second order. The Einstein equations can be reduced to a single linear wave equation with a potential and a source term. The source term is quadratic in terms of the first-order perturbations. This provides a formalism to address the validity of many first-order calculations of interest in astrophysics. © 1996 IOP Publishing Ltd.

Pseudospin Transformation Of Physical Operators, A. L. Blokhin, C. Bahri, J. P. Draayer

Faculty Publications

A procedure for applications of the pseudospin transformation within the framework of nuclear oscillator shell model is developed. It is valid for operators expressed in terms of single-particle variables and is based on permutation rules for special rotational invariants. The procedure is applied to a number of physical operators including several rotational scalars, the spin and orbital momenta, and the quadrupole moment. An algorithm for generating an approximation to the pseudospin transformation, which gives a simple and accurate expression for dominant parts of required transforms, is also given. The algebras associated with pseudospin transformations are discussed. © 1996 IOP Publishing …

The Japanese Civil Service And Economic Development: Catalysts Of Change Eds. Hyung-Ki Kim, Michio Muramatsu, And T. J. Pempel, Robert C. Angel

Faculty Publications

No abstract provided.

Inhomogeneity In Gelation And Nonuniversality Of Sol-To-Gel Transitions Studied By A Computer Simulation Model, Yi-Min Liu, R.B. Pandey

Faculty Publications

No abstract provided.

Shakespeare's Christian Dimension: An Anthology Of Commentary, James H. Sims

Faculty Publications

No abstract provided.

Early Agriculture In The Maya Lowlands, Mary D. Pohl, Kevin O. Pope, John G. Jones, John S. Jacob, Dolores R. Piperno, Susan D. Defrance, David L. Lentz, John A. Gifford, Marie E. Danforth, J. Kathryn Josserand

Faculty Publications

Wetland research in northern Belize provides the earliest evidence for development of agriculture in the Maya Lowlands. Pollen data confirm the introduction of maize and manioc before 3000 B.C. Dramatic deforestation, beginning ca. 2500 B.C. and intensifying in wetland environments ca. 1500-1300 B.C., marks an expansion of agriculture, which occurred in the context of a mixed foraging economy. By 1000 B.C. a rise in groundwater levels led farmers to construct drainage ditches coeval with the emergence of Maya complex society ca. 1000-400 B.C. Field manipulations often involved minor modifications of natural hummocks. Canal systems are not as extensive in northern …

Detection For A Statistically-Known, Time-Varying Dispersive Channel, David W. Matolak, S. G. Wilson

Faculty Publications

Detection for the statistically known channel (SKC) is aimed at obtaining good performance in situations where our statistical knowledge of a time-varying channel is good, and where other equalization/detection schemes are either too complex to implement, or their performance is limited due to the rapidity of channel fading, or where we are simply unable to perform channel estimation. By using a statistical characterization of the channel, we develop a new detector that performs maximum-likelihood sequence estimation (MLSE) (given the channel model) on blocks of N symbols. Both symbol-spaced and fractionally spaced samples are used, to obtain two different detectors, that …

Ground‐Based Measurements Of Nox And Total Reactive Oxidized Nitrogen (Noy) At Sable Island, Nova Scotia, During The Nare 1993 Summer Intensive, T. Wang, M. A. Carroll, G. M. Albercook, K. R. Owens, Katharine A. Duderstadt, A. N. Markevitch, D. D. Parrish, J. S. Holloway, F. C. Fehsenfeld, G. Forbes, J. Ogren

Faculty Publications

Measurements of NO, NO2, and total reactive oxidized nitrogen (NOy) were added to ongoing measurements of aerosols, CO, and O3 at Sable Island (43°55′N, 60°01′W), Nova Scotia, during the North Atlantic Regional Experiment (NARE) 1993 summer intensive. Ambient levels of NOx and NOy were found to be highly variable, and elevated levels can be attributed to the transport of polluted continental air or presumably to relatively fresh emissions from sources upwind (e.g., ship traffic). The median values for NOx and NOy are 98 and 266 parts per trillion by volume (pptv), respectively. A multiday pollution episode occurred during which elevated …

Three-Dimensional Display Utilizing A Diffractive Optical Element And An Active Matrix Liquid Crystal Display, Gregory P. Nordin, M. W. Jones, S. T. Kowel, J. H. Kulick, R. G. Lindquist

Faculty Publications

We describe the design, construction, and performance of the first real-time autostereoscopic three-dimensional (3-D) display based on the partial pixel 3-D display architecture. The primary optical components of the 3-D display are an active-matrix liquid crystal display and a diffractive optical element (DOE). The display operates at video frame rates and is driven with a conventional VGA signal. Three-dimensional animations with horizontal motion parallax are readily viewable as sets of stereo images. Formation of the virtual viewing slits by diffraction from the partial pixel apertures is experimentally verified. The measured contrast and perceived brightness of the display are excellent, but …

Densidad De Anglicismos En El Léxico Disponible De La República Dominicana, Orlando Alba

Faculty Publications

En este artículo se presenta un análisis cuantitativo con el propósito de descubrir la densidad de los anglicismos en el léxico disponible dominicano de acuerdo con diversas variables. Se descubre que el factor más relevante para motivar la presencia de los anglicismos es la diferencia de centros de interés. En unos campos, la densidad es alta (medios de transporte, juegos, el vestido), pero en otros es muy baja e incluso, nula (animales, el cuerpo humano).

On The Matroids In Which All Hyperplanes Are Binary, S. R. Kingan, J. G. Oxley

Faculty Publications

In this paper, it is shown that, for a minor-closed class ℳ of matroids, the class of matroids in which every hyperplane is in ℳ is itself minor-closed and has, as its excluded minors, the matroids U1,1 ⊕ N such that N is an excluded minor for ℳ. This result is applied to the class of matroids of the title, and several alternative characterizations of the last class are given.

Activation Of Δ-Globin Gene Expression By Erythroid Krupple-Like Factor: A Potential Approach For Gene Therapy Of Sickle Cell Disease, David Donze, Paxson H. Jeancake, Tim M. Townes

Faculty Publications

Hemoglobin A2 (HbA2; α2δ2) is a powerful inhibitor of HbS (α2β2/(S) polymerization. However, HbA2 levels are normally low in sickle cell patients. We show that a major reason for low δ-globin gene expression is the defective CACCC box at -90 in the δ-globin promoter. When the CACCC box defect in δ is corrected, expression of an HS2 δ/Luciferase reporter is equivalent to HS2 β/Luciferase. Erythroid Krupple-like factor (EKLF), which binds to the CACCC box of the β-globin gene and activates high-level expression, does not bind to the normal δ-globin promoter. Our goal is to design a modified EKLF that binds …

Acylation Of Glucosaminyl Phosphatidylinositol Revisited. Palmitoyl-Coa Dependent Palmitoylation Of The Inositol Residue Of A Synthetic Dioctanoyl Glucosaminyl Phosphatidylinositol By Hamster Membranes Permits Efficient Mannosylation Of The Glucosamine Residue, William T. Doerrler, Jianhua Ye, J. R. Falck, Mark A. Lehrman

Faculty Publications

Two critical steps in the assembly of yeast and mammalian glycosylphosphatidylinositol (GPI) anchor precursors are palmitoylation of the inositol residue and mannosylation of the glucosamine residue of the glucosaminyl phosphatidylinositol (GlcNα-PI) intermediate. Palmitoylation has been reported to be acyl-CoA dependent in yeast membranes (Costello, L. C., and Orlean, P. (1992) J. Biol. Chem. 267, 8599-8603) but strictly acyl- CoA independent in rodent membranes (Stevens, V. L., and Zhang, H. (1994) J. Biol. Chem. 269, 31397-31403), and thus poorly conserved. In addition, it was suggested that acylation must precede mannosylation in both yeast (Costello, L. C., and Orlean, P. (1992) J. …

Nonequilibrium Critical Dynamics Of A Three Species Monomer-Monomer Model, Kevin E. Bassler, Dana A. Browne

Faculty Publications

We study a three species monomer-monomer catalytic surface reaction model with a reactive steady state bordered by three equivalent unreactive phases where the surface is saturated with one species. The transition from the reactive to a saturated phase shows directed percolation critical behavior. Each pair of these reactive-saturated phase boundaries joins at a bicritical point where the universal behavior is in the even branching annihilating random walk class. We find the crossover exponent from bicritical to critical behavior and a new exponent associated with the bicritical interface dynamics. © 1996 The American Physical Society.

Review Of Private Means, Public Ends: Voluntarism Vs. Coercion, Edited By J. Wilson Mixon, Jr., Fred Foldvary

Faculty Publications

A review of Private Means, Public Ends: Voluntarism vs. Coercion, edited by J. Wilson Mixon, Jr.The Foundation for Economic Education. 1996 • 150 pages. $14.95 paperback.

Remotely Possible? Simple Remote Access To The Network, Margaret Sylvia

Faculty Publications

Remote access to the library is possible without a magic wand. we have seen increased use of the library in recent years, either because of, or despite, the possibility of remote access. One reason may be that some full-text material is still only available inside the library. Remote access was first implemented in the St. Mary's University Academic Library in 1991, shortly after the installation of the first network in the library. Various options for remote access are compared and contrasted, including the EA/2 solution.

Characterization Of Sr‐Doped Lamno3 And Lacoo3 As Cathode Materials For A Doped Lagao3 Ceramic Fuel Cell, Kevin Huang, Man Feng, John B. Goodenough, Michael Schmerling

Faculty Publications

Energy dispersive spectrometry line scan and ac impedance spectroscopy were used in this study to investigate the chemical reactions between two cathode materials, La_0.84Sr_0.16MnO₃ (LSM), La_0.5Sr_0.5CoO_3-δ (LSC), and the electrolyte La_0.9Sr_0.1Ga_0.8Mg_0.2O_2.85 (LSGM). Significant interdiffusions of Co into LSGM and Ga into LSC were found at an LSC/LSGM interface even at relatively low fabrication temperatures. In contrast, only small interdiffusions of Mn into LSGM and Ga into LSM were detected at the LSM/LSGM interface even though it was fired at 1470°C. The …

The Failure Of The Religious Freedom Restoration Act Under Section 5 Of The Fourteenth Amendment, William W. Van Alstyne

Faculty Publications

No abstract provided.

Legislature Mulls Change Of Article 8; Corporate Law, Francis J. Facciolo

Faculty Publications

(Excerpt)

A major revision of Article 8 of the Uniform Commercial Code was passed by the New York Assembly on July 2, 1996, but did not receive Senate consideration prior to adjustment. In light of the strong support given Proposed Article 8 by the banking and securities industries, the New York State Legislature will probably give serious consideration to passage when the next legislative session begins.

Although the supporters of Proposed Article 8 have stoutly maintained that it is primarily a clarification of the existing Article 8 and that the proposed changes are insignificant, the proposal actually includes major changes …

No Noose Is Good News: Leadership As A Theological Problem In The Corinthian Correspondence, David E. Fredrickson

Faculty Publications

The role of the leader implied by Paul’s Corinthian letters is to prepare persons for public participation in the gathered community. Paul portrays himself as the community’s slave, who thus makes others free for political participation.

Crime Legislation And The Public Interest: Lessons From Civil Rico, Douglas E. Abrams

Faculty Publications

This Securities Symposium provides an opportunity to evaluate civil RICO's place in American law at the end of the private remedy's first quarter-century. In its essence, civil RICO is the unfortunate product of crime legislation hastily enacted in the heat of a national political campaign. Rushing toward adjournment, Congress enacted RICO on October 12, 1970 as Title IX of the omnibus Organized Crime Control Act (OCCA). President Nixon signed the OCCA on October 15. Less than three weeks later, Americans preoccupied with crime went to the polls in off-year congressional elections after a shrill campaign dominated by ‘law and order‘ …

In Pursuit Of Health, Richard C. Reuben

Faculty Publications

Managed-care advocates praise its cost controls on treatments for beginning to tame the health care beast, which devoured nearly 14 percent of the nation's gross domestic product in 1994, according to the U.S. Department of Health and. Human Services. Such belt-tightening is necessary to allocate health care dollars rationally, advocates contend, pointing to direct patient costs as proof that a healthy balance has been achieved. But critics contend that managed care is more about making money than saving it. Even though costs have gone down, they argue, premiums have remained high and corporate profits have soared. More significantly, they charge …

Large-Area Sub-Millimeter Resolution Cdznte Strip Detector For Astronomy, J. R. Macri, B. A. Apotovsky, J. F. Butler, M. L. Cherry, B. K. Dann, F. P. Doty, T. G. Guzik, M. L. Mcconnell, J. M. Ryan

Faculty Publications

We report performance measurements of a sub-millimeter resolution CdZnTe strip detector developed as a prototype for astronomical instruments. The prototype is a 1.4 mm thick, 64 × 64 stripe CdZnTe array with 0.375 mm pitch in both dimensions. Pulse height spectra in orthogonal stripe coincidence mode were recorded at several energies. The room-temperature energy resolution is (FWHM) for 122 keV photons with a peak-to-valley ratio >5:1. We also demonstrate spatial resolution capabilities finer than the stripe pitch.

A Metaphor In "Beowulf" 2487a: Gūðhelm Tōglād, Scott Gwara

Faculty Publications

No abstract provided.

A Reexamination Of Balassa's Productivity Bias Hypothesis, Mohsen Bahmani Oskooee, Farhang Niroomand

Faculty Publications

No abstract provided.

Ancient Peoples And Landscapes, H. Edwin Jackson

Faculty Publications

No abstract provided.

The Limits Of Racial Domination: Plebeian Society In Colonial Mexico City, 1660-1720 , By R. Douglas Cope, Michael C. Scardaville

Faculty Publications

A review of The Limits of Racial Domination: Plebeian Society in Colonial Mexico City, 1660-1720, by R. Douglas Cope

Modeling Interactions Of Browsing Predation, Infaunal Activity And Recruitment In Marine Soft-Sediment Habitats, Sara M. Lindsay, David S. Wethey, Sarah A. Woodin

Faculty Publications

In marine soft-sediment habitats, the sediment surface is altered by activities of sediment dwellers (infauna). Such biogenic disturbance can influence recruitment success if settling larvae and juveniles avoid disturbed sites or if juveniles die as a result of disturbance after settling. Because infauna commonly lose exposed body parts to browsing predators and disturb less sediment as a result, we developed a simulation model to examine the interactions between browsing predation, infaunal adult activity, and recruitment. Sediment disturbance in the model was based on data for the polychaete Abarenicola pacifica. We simulated the activity of two general types of predators: prey …

East Africa Diary: October 1996, Keith Clouten

Faculty Publications

Diary of my 1996 visit to Solusi and Baraton, as well as the workshop I did for librarians in Nairobi.