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Geodynamic Interpretation Of Regional Unconformities: Research Fund Eustacy Or Tectonics?, Daniel Goldman Dec 1998

Geodynamic Interpretation Of Regional Unconformities: Research Fund Eustacy Or Tectonics?, Daniel Goldman

Daniel Goldman

Funding agency: Petroleum Research Fund Investigators: C.E. Mitchell, Dr. Goldman Amount: $ 6,500.00


Optimization Methods For Logical Inference, Vijay Chandru, John Hooker Dec 1998

Optimization Methods For Logical Inference, Vijay Chandru, John Hooker

John Hooker

No abstract provided.


Growth Of Oriented Thick Films Of Gallium Nitride From The Melt., Jeffrey Dyck, K. Kash, M. Grossner, C. Hayman, A. Argoitia, N. Yang, M.-H. Hong, M. Kordesch, J. Angus Dec 1998

Growth Of Oriented Thick Films Of Gallium Nitride From The Melt., Jeffrey Dyck, K. Kash, M. Grossner, C. Hayman, A. Argoitia, N. Yang, M.-H. Hong, M. Kordesch, J. Angus

Jeffrey Dyck

While significant strides have been made in the optimization of GaN-based devices on foreign substrates, a more attractive alternative would be homoepitaxy on GaN substrates. The primary motivation of this work is to explore the growth of thick films of GaN from the melt for the ultimate use as substrate material. We have previously demonstrated the synthesis of polycrystalline, wurtzitic gallium nitride and indium nitride by saturating gallium metal and indium metal with atomic nitrogen from a microwave plasma source. Plasma synthesis avoids the high equilibrium pressures required when molecular nitrogen is used as the nitrogen source. Here we report …


Consumption Adjustment Under Time-Varying Income Uncertainty, Douglas Steigerwald, Joon-Ho Hahm Dec 1998

Consumption Adjustment Under Time-Varying Income Uncertainty, Douglas Steigerwald, Joon-Ho Hahm

Douglas G. Steigerwald

We study the effect of income uncertainty on consumption in a model that includes precautionary saving. In contrast to previous studies, we focus on time-series variation in income uncertainty. Our time-series measure of income uncertainty is constructed from a panel of forecasts. We find evidence of precautionary saving in that increases in income uncertainty are related to increases in aggregate rates of saving. We also find evidence that anticipated income growth rates have less explanatory power for consumption growth rates after conditioning on income uncertainty. The evidence indicates the presence of forward-looking consumers who gradually adjust precautionary savings in response …


Changes In The Fermi Surface At The Magnetization Reorientation Transition In Fe/Cu(100), Reginaldt H. Madjoe, Alexey N. Koveshnikov, Christopher Harwell, Randall W. Hall, Roger L. Stockbauer, Richard L. Lutz Dec 1998

Changes In The Fermi Surface At The Magnetization Reorientation Transition In Fe/Cu(100), Reginaldt H. Madjoe, Alexey N. Koveshnikov, Christopher Harwell, Randall W. Hall, Roger L. Stockbauer, Richard L. Lutz

Randall W. Hall

We present a study of the evolution of the valence bandstructure of Fe/Cu(100) as a function of Fe coverage in the 0–12 monolayer range. Angle-resolved photoelectron spectroscopy was used to probe the valence electronic structure and to extract Fermi surface contours as a function of increasing Fe coverage. The first few monolayers show Fe-induced densities of states that are significantly different from those in thicker films. At 5 ML, distinct changes occur in the Fermi surface, where a magnetization reorientation transition has been observed previously.


Single-Crystal 27Al Nmr Of Andalusite And Calculated Electric Field Gradients: The First Complete Nmr Assignment For A 5-Coordinate Aluminum Site, Pamela L. Bryant, Chris R. Harwell, Katherine Wu, Frank R. Fronczek, Randall W. Hall, Leslie G. Butler Dec 1998

Single-Crystal 27Al Nmr Of Andalusite And Calculated Electric Field Gradients: The First Complete Nmr Assignment For A 5-Coordinate Aluminum Site, Pamela L. Bryant, Chris R. Harwell, Katherine Wu, Frank R. Fronczek, Randall W. Hall, Leslie G. Butler

Randall W. Hall

Andalusite, Al2SiO5, contains 5- and 6-coordinate aluminum sites, and is a preeminent model for 27 Al NMR spectroscopy. We describe a combined NMR, crystallography, and theory project:  single-crystal 27 Al NMR spectra at 298 K, the crystal structure of andalusite at 115 K, and electric field gradient calculations. The low-symmetry 5-coordinate site is a stiff test of the computational methods. In addition, the chemical shift tensor is measured for the 5-coordinate site. The small body of 27 Al NMR data, especially for rare 5-coordinate sites, inspires the calculation of NMR parameters. We explore the accuracy of two approaches for 27 …


Alternative Polynomial And Holomorphic Dunford-Pettis Properties, Walden Freedman Dec 1998

Alternative Polynomial And Holomorphic Dunford-Pettis Properties, Walden Freedman

Walden Freedman

Alternatives to the Polynomial Dunford-Pettis property and the Holomorphic Dunford-Pettis property, called the PDP1 and HDP1 properties, respectively, are introduced. These are shown to be equivalent to the DP1 property, an alternative Dunford-Pettis property previously introduced by the author, thus mirroring the equivalence of the three original properties.


Conditional Convergence Of Infinite Products, William F. Trench Dec 1998

Conditional Convergence Of Infinite Products, William F. Trench

William F. Trench

No abstract provided.


Dynamics Of Simulated Water Under Pressure, Francis W. Starr, F. Sciortino, H. E. Stanley Dec 1998

Dynamics Of Simulated Water Under Pressure, Francis W. Starr, F. Sciortino, H. E. Stanley

Francis Starr

No abstract provided.


Time Course Of Fmri-Activation In Language And Spatial Networks During Sentence Comprehension, Patricia A. Carpenter, Marcel Adam Just, Timothy A. Keller, William F. Eddy, Keith R. Thulborn Dec 1998

Time Course Of Fmri-Activation In Language And Spatial Networks During Sentence Comprehension, Patricia A. Carpenter, Marcel Adam Just, Timothy A. Keller, William F. Eddy, Keith R. Thulborn

Marcel Adam Just

No abstract provided.


Linear Asymptotic Equilibrium For Nilpotent Systems Of Difference Equations, William F. Trench Dec 1998

Linear Asymptotic Equilibrium For Nilpotent Systems Of Difference Equations, William F. Trench

William F. Trench

No abstract provided.


Plasticity Of Language-Related Brain Function During Recovery From Strok, Keith R. Thulborn, Patricia A. Carpenter, Marcel Adam Just Dec 1998

Plasticity Of Language-Related Brain Function During Recovery From Strok, Keith R. Thulborn, Patricia A. Carpenter, Marcel Adam Just

Marcel Adam Just

No abstract provided.


Computational Modeling Of High-Level Cognition And Brain Function, Marcel Adam Just, Patricia A. Carpenter, Sashank Varma Dec 1998

Computational Modeling Of High-Level Cognition And Brain Function, Marcel Adam Just, Patricia A. Carpenter, Sashank Varma

Marcel Adam Just

No abstract provided.


Invertibly Convergent Infinite Products Of Matrices, William F. Trench Dec 1998

Invertibly Convergent Infinite Products Of Matrices, William F. Trench

William F. Trench

No abstract provided.


Indexing Flower Patent Images Using Domain Knowledge, Madirakshi Das, R. Manmatha, Edward M. Riseman Dec 1998

Indexing Flower Patent Images Using Domain Knowledge, Madirakshi Das, R. Manmatha, Edward M. Riseman

R. Manmatha

A new approach to indexing a specialized database by utilizing the color and spatial domain knowledge available for the database is described. This approach is illustrated by using it to provide a solution to the problem of indexing images of flowers for searching a flower patents database by color. The flower region is isolated from the background by using an automatic iterative segmentation algorithm with domain knowledge-driven feedback. The color of the flower is defined by the color names present in the flower region and their relative proportions. The database can be queried by example and by color names. The …


A Synthesis Of Lead Isotopes In Two Millennia Of European Air, Charles Dunlap, Eiliv Steinnes, A. Russell Flegal Dec 1998

A Synthesis Of Lead Isotopes In Two Millennia Of European Air, Charles Dunlap, Eiliv Steinnes, A. Russell Flegal

Charles Dunlap

Four airborne particulate records from ombrotrophic peat bogs in southern Norway, extending back 300 years, have been measured for chronology, lead concentration, and lead isotope composition. Since southern Norway receives an airborne lead signal that accumulates emissions from the European continent, the trend in the four bog records can be used to correlate previously reported measurements from France, Switzerland, England, and Greenland that cover different ranges of time. When these are compiled, the integrated European record that emerges spans the last 2300 years of human influence on lead in the air over Europe and suggests human control of lead in …


The Hofmann Rearrangement Using Household Bleach: Synthesis Of 3-Nitroaniline, Ram S. Mohan, Keith A. Monk Dec 1998

The Hofmann Rearrangement Using Household Bleach: Synthesis Of 3-Nitroaniline, Ram S. Mohan, Keith A. Monk

Ram S. Mohan

No abstract provided.


Oxidation Of Benzoins To Benzils Using Bismuth(Iii) Nitrate-Copper(Ii) Acetate, Ram S. Mohan, Steven A. Tymonko, Bryce A. Nattier Dec 1998

Oxidation Of Benzoins To Benzils Using Bismuth(Iii) Nitrate-Copper(Ii) Acetate, Ram S. Mohan, Steven A. Tymonko, Bryce A. Nattier

Ram S. Mohan

Benzoins are oxidized to benzils in excellent yields by 0.4 equivalents of Bi(NO3)3.5H20 and 4 mol% of Cu(OAc)23)3.5H20 is a stable, inexpensive, commercially available solid. The relatively low cost and low toxicity of bismuth(Ill) nitrate makes this procedure a particularly attractive method for oxidation of benzoins.


Multi-Modal Retrieval Of Trademark Images Using Global Similarity, S Ravela, R. Manmatha Dec 1998

Multi-Modal Retrieval Of Trademark Images Using Global Similarity, S Ravela, R. Manmatha

R. Manmatha

In this paper a system for multi-modal retrieval of trademark images is presented. Images are characterized and retrieved using associated text and visual appearance. A user initiates retrieval for similar trademarks by typing a text query. Subsequent searches can be performed by visual appearance or using both appearance and text information. Textual information associated with trademarks is searched using the INQUERY search engine. Images are searched visually using a method for global image similarity by appearance developed in this paper. Images are filtered with Gaussian derivatives and geometric features are computed from the filtered images. The geometric features used here …


On The Laws Of Homogeneous Functionals Of The Brownian Bridge, Philippe Carmona, Frédérique Petit, Jim Pitman, Marc Yor Dec 1998

On The Laws Of Homogeneous Functionals Of The Brownian Bridge, Philippe Carmona, Frédérique Petit, Jim Pitman, Marc Yor

Jim Pitman

No abstract provided.


Conjugate Schema In The Hp Heteropolymer Model Of Protein Folding And Protein, S. Kazadi, H. Lin, S. Ogita, Dela Tsikata Dec 1998

Conjugate Schema In The Hp Heteropolymer Model Of Protein Folding And Protein, S. Kazadi, H. Lin, S. Ogita, Dela Tsikata

Sanza Kazadi

Conjugate schema are computational tools that allow for the identification of independent blocks of vector components. These allow researchers to focus their efforts on optimizations within blocks of vector components that are codependant, rather than using the entire vector. Protein design and protein folding, already having been tackled using genetic algorithms, are natural candidates as computational problems whose solution is aided by the use of conjugate schema. We present work on protein folding and protein design in the HP heteropolymer model indicating that such usage is warrented and beneficial.


Contraction Of The Model For The Bray-Liebhafsky Oscillatory Reaction By Eliminating Intermediate I2o, Zeljko D. Cupic Dec 1998

Contraction Of The Model For The Bray-Liebhafsky Oscillatory Reaction By Eliminating Intermediate I2o, Zeljko D. Cupic

Zeljko D Cupic

No abstract provided.


Semi-Insulating Semiconductor Heterostructures: Optoelectronic Properties And Applications, David D. Nolte Dec 1998

Semi-Insulating Semiconductor Heterostructures: Optoelectronic Properties And Applications, David D. Nolte

David D Nolte

This review covers a spectrum of optoelectronic properties of and uses for semi-insulating semiconductor heterostructures and thin films, including epilayers and quantum wells. Compensation by doping, implantation, and nonstoichiometric growth are described in terms of the properties of point defects and Fermi level stabilization and pinning. The principal optical and optoelectronic properties of semi-insulating epilayers and heterostructures, such as excitonic electroabsorption of quantum-confined excitons, are described, in addition to optical absorption by metallic or semimetallic precipitates in these layers. Low-temperature grown quantum wells that have an arsenic-rich nonstoichiometry and a supersaturated concentration of grown-in vacancies are discussed. These heterostructures experience …


Microlensing Of Circumstellar Envelopes I. Simplified Considerations For Diagnosing Radial And Azimuthal Flow., R. Ignace, M. A. Hendry Dec 1998

Microlensing Of Circumstellar Envelopes I. Simplified Considerations For Diagnosing Radial And Azimuthal Flow., R. Ignace, M. A. Hendry

Richard Ignace

This paper presents first results on the line profile shapes from a circumstellar envelope in bulk motion as modified by a microlensing event. Only geometrically and optically thin spherical shells in uniform expansion or rotation are considered here so as to emphasise the information content available in the profile shapes. In particular it is demonstrated that for the case of expansion, the line emission can increase by significant factors and the time variation of the profile shape is symmetric about line centre. For uniform rotation the line emission also increases significantly, but the time evolution of the profile shape is …


How Does Krygen Xl Truly Work?, Eam Smith Dec 1998

How Does Krygen Xl Truly Work?, Eam Smith

eam smith

Krygen XL is a male improvement condition that is exceptionally expected for men to assemble moxy and s3xual need. This shocking upgrade will empower you to get back your virility in a short length. Normally, it is shocking for men to recover s3xual power due to various components. Krygen XL male upgrade will heighten your s3xual introduction and engage to satisfy the accessory in bed. Krygen XL UK works all around enough in men by boosting up the testosterone level. It is set up by completely ordinary fixings and impacts your body with no damaging substance. This thing will manufacture the circulation system in …


What Are The Ingredients Used In Keto Advanced Weight Loss?, Edam Smith Dec 1998

What Are The Ingredients Used In Keto Advanced Weight Loss?, Edam Smith

edam smith

Keto Advanced Weight Loss tends to be useful to find out about an enhancement by becoming acquainted with its fixings. Notwithstanding, Keto Advanced is in the one of a kind circumstance of being a piece too new to even consider having its fixings list accessible. What's more, that implies we can't really know how these fixings work or how they may influence you. Notwithstanding, the fixings ought to be imprinted on the jug name in the event that you buy the item. Along these lines, remember that – you ought to get some information about the fixings before you take …