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Dynamical Balance In The Indonesian Seas Circulation, William H. Burnett, Vladimir M. Kamenkovich, David A. Jaffe, Arnold L. Gordon, George L. Mellor Sep 2000

Dynamical Balance In The Indonesian Seas Circulation, William H. Burnett, Vladimir M. Kamenkovich, David A. Jaffe, Arnold L. Gordon, George L. Mellor

Faculty Publications

A high resolution, four-open port, non-linear, barotropic ocean model (2D POM) is used to analyze the Indonesian Seas circulation. Both local and overall momentum balances are studied. It is shown that geostrophy holds over most of the area and that the Pacific-Indian Ocean pressure difference is essentially balanced by the resultant of pressure forces acting on the bottom.

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The Supreme Court's Backwards Proportionaility Jurisprudence: Comparing Judicial Review Of Excessive Criminal Punishments And Excessive Punitive Damages Award, Adam M. Gershowitz Sep 2000

The Supreme Court's Backwards Proportionaility Jurisprudence: Comparing Judicial Review Of Excessive Criminal Punishments And Excessive Punitive Damages Award, Adam M. Gershowitz

Faculty Publications

No abstract provided.

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The Monument To Brigham Young And The Pioneers : One Hundred Years Of Controversy, J. Michael Hunter Sep 2000

The Monument To Brigham Young And The Pioneers : One Hundred Years Of Controversy, J. Michael Hunter

Faculty Publications

For more than a century, the Brigham Young Monument in Salt Lake City has been the center of sometimes acrimonious controversy. The idea and organization to create a monument were begun in 1891. The statue of Brigham Young was completed by Cyrus Dallin in 1893. Many delays in raising funds caused the monument not to be finished until 1900. Thereafter it often became the target of those trying to improve traffic conditions in the downtown area. In 1993, the monument was moved just north of the intersection to improve the flow of traffic. On the monuments one hundredth anniversary, "The …

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Peaches, Speech, And Clarence Thomas: Yes, California, There Is A Justice Who Understands The Ramifications Of Controlling Commercial Speech, Jennifer R. Franklin Sep 2000

Peaches, Speech, And Clarence Thomas: Yes, California, There Is A Justice Who Understands The Ramifications Of Controlling Commercial Speech, Jennifer R. Franklin

Faculty Publications

No abstract provided.

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Using Hydrothermal Time Concepts To Model Seed Germination Response To Temperature Dormancy Loss And Priming Effects In Elymus Elymoides, Phil S. Allen, Susan E. Meyer, Susan B. Debaene-Gill Sep 2000

Using Hydrothermal Time Concepts To Model Seed Germination Response To Temperature Dormancy Loss And Priming Effects In Elymus Elymoides, Phil S. Allen, Susan E. Meyer, Susan B. Debaene-Gill

Faculty Publications

Hydrothermal time (HTT) describes progress toward seed germination under various combinations of incubation water potential (Ψ) and temperature (T). To examine changes in HTT parameters during dormancy loss, seeds from two populations of the bunchgrass Elymus elymoides were incubated under seven temperature regimes following dry storage at 10, 20 and 30 °C for intervals from 0 to 16 weeks. Fully after-ripened seeds were primed for 1 week at a range of s. Data on germination rate during priming were used to obtain a HTT equation for each seed population, while data obtained following transfer to water were used to calculate …

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A Dynamic Optimal Trajectory Generator For Cartesian Path Following, Edward Red Sep 2000

A Dynamic Optimal Trajectory Generator For Cartesian Path Following, Edward Red

Faculty Publications

This paper considers a dynamic and adaptive trajectory generator for negotiating paths using S-curves. Applying constant jerk transitions between the constant acceleration and deceleration periods of the trajectory, the trajectory will optimally transition to the desired speed setting. Optimal is defined to be the minimum time to transition from the current speed to the set speed for the move segment when jerk and acceleration are limited. The S-curve equations will adapt to instantaneous changes in speed setting and path length. An integrated motion planner will determine allowable speeds and transitional profiles based on the remaining move distance.

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The Polarization Of Sb Overlayers On Nimnsb(100), Takashi Komesu, C. N. Borca, Hae Kyung Jeong, P. A. Dowben, Delia Ristoiu, J. P. Nozières, Shane Stadler, Y. U. Idzerda Aug 2000

The Polarization Of Sb Overlayers On Nimnsb(100), Takashi Komesu, C. N. Borca, Hae Kyung Jeong, P. A. Dowben, Delia Ristoiu, J. P. Nozières, Shane Stadler, Y. U. Idzerda

Faculty Publications

We have investigated the induced polarization of paramagnetic Sb overlayers on the Heusler alloy NiMnSb. From combined X-ray absorption spectroscopy (XAS) and spin-polarized inverse photoemission spectroscopy (SPIPES), we can assign some of the unoccupied states of the Heusler alloy NiMnSb. With increasing thickness of the Sb overlayer, there is a decline in the density of states near the Fermi energy, as expected for a semimetal overlayer on a metallic substrate. While the Sb is polarized by the ferromagnetic NiMnSb substrate, consistent with the expectations of mean field theory, the polarization at the center of the surface/overlayer Brillouin zone cannot be …

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Algan/Gan Metal-Oxide-Semiconductor Heterostructure Field-Effect Transistors On Sic Substrates, M. Asif Khan, X. Hu, A. Tarakji, Grigory Simin, J. Yang, R. Gaska, M. S. Shur Aug 2000

Algan/Gan Metal-Oxide-Semiconductor Heterostructure Field-Effect Transistors On Sic Substrates, M. Asif Khan, X. Hu, A. Tarakji, Grigory Simin, J. Yang, R. Gaska, M. S. Shur

Faculty Publications

We report on AlGaN/GaN metal–oxide–semiconductor heterostructurefield-effect transistors (MOS-HFETs) grown over insulating 4H–SiC substrates. We demonstrate that the dc and microwave performance of the MOS-HFETs is superior to that of conventional AlGaN/GaN HFETs, which points to the high quality of SiO2/AlGaNheterointerface. The MOS-HFETs could operate at positive gate biases as high as +10 V that doubles the channel current as compared to conventional AlGaN/GaN HFETs of a similar design. The gate leakage current was more than six orders of magnitude smaller than that for the conventional AlGaN/GaN HFETs. The MOS-HFETs exhibited stable operation at elevated temperatures up to 300 …

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Canonical Quantum Gravity In The Vassiliev Invariants Arena: I. Kinematical Structure, Cayetano Di Bartolo, Rodolfo Gambini, Jorge Griego, Jorge Pullin Aug 2000

Canonical Quantum Gravity In The Vassiliev Invariants Arena: I. Kinematical Structure, Cayetano Di Bartolo, Rodolfo Gambini, Jorge Griego, Jorge Pullin

Faculty Publications

We generalize the idea of Vassiliev invariants to the spin network context, with the aim of using these invariants as a kinematical arena for a canonical quantization of gravity. This paper presents a detailed construction of these invariants (both ambient and regular isotopic) requiring a significant elaboration based on the use of Chern - Simons perturbation theory which extends the work of Kauffman, Martin and Witten to four-valent networks. We show that this space of knot invariants has the crucial property - from the point of view of the quantization of gravity - of being loop differentiable in the sense …

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Canonical Quantum Gravity In The Vassiliev Invariants Arena: Ii. Constraints, Habitats And Consistency Of The Constraint Algebra, Cayetano Di Bartolo, Rodolfo Gambini, Jorge Griego, Jorge Pullin Aug 2000

Canonical Quantum Gravity In The Vassiliev Invariants Arena: Ii. Constraints, Habitats And Consistency Of The Constraint Algebra, Cayetano Di Bartolo, Rodolfo Gambini, Jorge Griego, Jorge Pullin

Faculty Publications

In a companion paper we introduced a kinematical arena for the discussion of the constraints of canonical quantum gravity in the spin network representation based on Vassiliev invariants. In this paper we introduce the Hamiltonian constraint, extend the space of states to non-diffeomorphism-invariant 'habitats' and check that the off-shell quantum constraint commutator algebra reproduces the classical Poisson algebra of constraints of general relativity without anomalies. One can therefore consider the resulting set of constraints and space of states as a consistent theory of canonical quantum gravity.

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Gettysburg: An Exhibit For The First-Year Reading Experience, Patrick G. Scott Aug 2000

Gettysburg: An Exhibit For The First-Year Reading Experience, Patrick G. Scott

Faculty Publications

Based on an exhibition for University of South Carolina students reading Michael Shaara's bestselling book The Killer Angels, this catalogue recounts the story of the battle of Gettysburg day by day, with an opening section introducing the major participants and a final section dealing with the commemoration of the battle and its treatment in later American literature. All the items in the exhibition are drawn from the Francis A. Lord Civil War Collection and the Robert S. Chamberlain Military History Collection, both in Rare Books & Special Collections, University of South Carolina Libraries.

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New Insights Into The Size And Stoichiometry Of The Plasminogen Activator Inhibitor Type-1·Vitronectin Complex, T. J. Podor, S. G. Shaughnessy, M. N. Blackburn, C. B. Peterson Aug 2000

New Insights Into The Size And Stoichiometry Of The Plasminogen Activator Inhibitor Type-1·Vitronectin Complex, T. J. Podor, S. G. Shaughnessy, M. N. Blackburn, C. B. Peterson

Faculty Publications

Plasminogen activator inhibitor-type 1 (PAI-1) is the primary inhibitor of endogenous plasminogen activators that generate plasmin in the vicinity of a thrombus to initiate thrombolysis, or in the pericellular region of cells to facilitate migration and/or tissue remodeling. It has been shown that the physiologically relevant form of PAI-1 is in a complex with the abundant plasma glyco-protein, vitronectin. The interaction between vitronectin and PAI-1 is important for stabilizing the inhibitor in a reactive conformation. Although the complex is clearly significant, information is vague regarding the composition of the complex and consequences of its formation on the distribution and activity …

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Measurement Of Exclusive Ω Electroproduction At Hera, J. Breitweg, S. Chekanov, M. Derrick, D. Krakauer, S. Magill, B. Musgrave, A. Pellegrino, J. Repond, R. Stanek, R. Yoshida, Margarita C. K. Mattingly, G. Abbiendi, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, N. Coppola, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, G. Laurenti Aug 2000

Measurement Of Exclusive Ω Electroproduction At Hera, J. Breitweg, S. Chekanov, M. Derrick, D. Krakauer, S. Magill, B. Musgrave, A. Pellegrino, J. Repond, R. Stanek, R. Yoshida, Margarita C. K. Mattingly, G. Abbiendi, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, N. Coppola, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, G. Laurenti

Faculty Publications

The exclusive electroproduction of ω mesons, ep → e ω p, has been studied in the kinematic range 3 < Q2 < 20 GeV2, 40 < W < 120 GeV and |t| < 0.6 GeV2 with the ZEUS detector at HERA using an integrated luminosity of 37.7 pb-1. The ω mesons were identified via the decay ω → π+ π- π0. The exclusive cross section in the above kinematic region is σ(ep) → e ω p = 0.108 ± 0.014 (stat.) ± 0.026(syst.) nb. The reaction ep → e φ p, φ → π+ π- π0, has also been measured. The cross sections, as well as the ratios σ γ·p → ωp/σ γ · p → p0p and σ γ · p → ωp/σγ·p → φp, are presented as a function of W and Q2. Thus, for the first time, the properties of ω electroproduction can be compared to those of p0,φ and J/ψ electroproduction at high W. (C) 2000 Elsevier Science B.V.

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The Effect Of Spatial And Temporal Accumulation Rate Variability In West Antarctica On Soluble Ion Deposition, Karl J. Kreutz, Paul A. Mayewski, L. David Meeker, Mark S. Twickler, Sallie I. Whitlow Aug 2000

The Effect Of Spatial And Temporal Accumulation Rate Variability In West Antarctica On Soluble Ion Deposition, Karl J. Kreutz, Paul A. Mayewski, L. David Meeker, Mark S. Twickler, Sallie I. Whitlow

Faculty Publications

Annually‐dated snowpit and ice core records from two areas of West Antarctica are used to investigate spatial accumulation patterns and to evaluate temporal accumulation rate/glaciochemical concentration and flux relationships. Mean accumulation rate gradients in Marie Byrd Land (11–23 gcm−2yr−1 over 150 km, decreasing to the south) and Siple Dome (10–18 gcm−2yr−1 over 60 km, decreasing to the south) are consistent for at least the last several decades, and demonstrate the influence of the offshore quasi‐permanent Amundsen Sea low pressure system on moisture flux into the region. Local and regional‐scale topography in both regions appears to affect orographic lifting, air mass …

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Biological Implications Of A Discrete Mathematical Model For Collagen Deposition And Alignment In Dermal Wound Repair, J. C. Dallon, J. A. Sherratt, P. K. Maini, M. W. Ferguson Aug 2000

Biological Implications Of A Discrete Mathematical Model For Collagen Deposition And Alignment In Dermal Wound Repair, J. C. Dallon, J. A. Sherratt, P. K. Maini, M. W. Ferguson

Faculty Publications

We develop a novel mathematical model for collagen deposition and alignment during dermal wound healing. We focus on the interactions between fibroblasts, modelled as discrete entities, and a continuous extracellular matrix composed of collagen and a fibrin based blood clot. There are four basic interactions assumed in the model: fibroblasts orient the collagen matrix, fibroblasts produce and degrade collagen and fibrin and the matrix directs the fibroblasts and determines the speed of the cells. Several factors which influence the alignment of collagen are examined and related to current anti-scarring therapies using transforming growth factor " The most influential of these …

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The X-Ray Transient Xte J1118+480: Multiwavelength Observations Of A Low-State Minioutburst, R. I. Hynes, C. W. Mauche, C. A. Haswell, C. R. Shrader, W. Cui, S. Chaty Aug 2000

The X-Ray Transient Xte J1118+480: Multiwavelength Observations Of A Low-State Minioutburst, R. I. Hynes, C. W. Mauche, C. A. Haswell, C. R. Shrader, W. Cui, S. Chaty

Faculty Publications

We present multiwavelength observations of the newly discovered X-ray transient XTE J1118+480 obtained in the rising phase of the 2000 April outburst. This source is located at unusually high Galactic latitude and in a very low absorption line of sight. This made the first Extreme Ultraviolet Explorer (EUVE) spectroscopy of an X-ray transient outburst possible. Together with our Hubble Space Telescope, Rossi X-Ray Timing Explorer, and United Kingdom Infrared Telescope data, this gives unprecedented spectral coverage. We find the source in the low hard state. The flat IR-UV continuum appears to be a combination of optically thick disk emission and …

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Measurement Of The Proton Structure Function F2 At Very Low Q2 At Hera, J. Breitweg, S. Chekanov, M. Derrick, D. Krakauer, S. Magill, A. Pellegrino, J. Repond, R. Stanek, R. Yoshida, Margarita C. K. Mattingly, G. Abbiendi, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, N. Coppola, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi Aug 2000

Measurement Of The Proton Structure Function F2 At Very Low Q2 At Hera, J. Breitweg, S. Chekanov, M. Derrick, D. Krakauer, S. Magill, A. Pellegrino, J. Repond, R. Stanek, R. Yoshida, Margarita C. K. Mattingly, G. Abbiendi, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, N. Coppola, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi

Faculty Publications

A measurement of the proton structure function F2(x, Q2) is presented in the kinematic range 0.045 GeV2 < Q2 < 0.65 GeV2 and 6 · 10-7 < x < 1 · 10-3. The results were obtained using a data sample corresponding to an integrated luminosity of 3.9pb-1 in e+ p reactions recorded with the ZEUS detector at HERA. Information from a silicon-strip tracking detector, installed in front of the small electromagnetic calorimeter used to measure the energy of the final-state positron at small scattering angles, together with an enhanced simulation of the hadronic final state, has permitted the extension of the kinematic range beyond that of previous measurements. The uncertainties in F2 are typically less than 4%. At the low Q2 values of the present measurement, the rise of F2 at low x is slower than observed in HERA data at higher Q2 and can be described by Regge theory with a constant logarithmic slope δlnF2/δln(1/x). The dependence of F2 on Q2 is stronger than at higher Q2 values, approaching, at the lowest Q2 values of this measurement, a region where F2 becomes nearly proportional to Q2. (C) 2000 Elsevier Science B.V.

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Sio2-Passivated Lateral-Geometry Gan Transparent Schottky-Barrier Detectors, V. Adivarahan, Grigory Simin, J. W. Yang, A. Lunev, M. Asif Khan, M. Pala, M. Shur, R. Gaska Aug 2000

Sio2-Passivated Lateral-Geometry Gan Transparent Schottky-Barrier Detectors, V. Adivarahan, Grigory Simin, J. W. Yang, A. Lunev, M. Asif Khan, M. Pala, M. Shur, R. Gaska

Faculty Publications

We report on a transparent Schottky-barrierultraviolet detector on GaN layers over sapphire substrates. Using SiO2 surface passivation, reverse leakage currents were reduced to a value as low as 1 pA at 5 V reverse bias for 200 μm diameter device. The device exhibits a high internal gain, about 50, at low forward biases. The response time (about 15 ns) is RC limited, even in the internal gain regime. A record low level of the noise spectral density, 5×10−23 A2/Hz, was measured at 10 Hz. We attribute this low noise level to the reduced reverse leakage current.

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An Approximation To Miscible Fluid Flows In Porous Media With Point Sources And Sinks By An Eulerian-Lagrangian Localized Adjoint Method And Mixed Finite Element Methods, Hong Wang, Liang Dong, Richard E. Ewing, Stephen L. Lyons, Guan Qin Aug 2000

An Approximation To Miscible Fluid Flows In Porous Media With Point Sources And Sinks By An Eulerian-Lagrangian Localized Adjoint Method And Mixed Finite Element Methods, Hong Wang, Liang Dong, Richard E. Ewing, Stephen L. Lyons, Guan Qin

Faculty Publications

We develop an Eulerian–Lagrangian localized adjoint method (ELLAM)-mixed finite element method (MFEM) solution technique for accurate numerical simulation of coupled systems of partial differential equations (PDEs), which describe complex fluid flow processes in porous media. An ELLAM, which was shown previously to outperform many widely used methods in the context of linear convection-diffusion PDEs, is presented to solve the transport equation for concentration. Since accurate fluid velocities are crucial in numerical simulations, an MFEM is used to solve the pressure equation for the pressure and Darcy velocity. This minimizes the numerical difficulties occurring in standard methods for approximating velocities caused …

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Preservation And Interpretive Plan For The Dill Tract Civil War Earthworks On James Island, South Carolina, Steven D. Smith Aug 2000

Preservation And Interpretive Plan For The Dill Tract Civil War Earthworks On James Island, South Carolina, Steven D. Smith

Faculty Publications

Beginning in the late fall of 1862 the Confederate Army defending Charleston began work on a line of earthworks and batteries across James Island, South Carolina, from Secessionville to the Stono River. The lines were called the "New Lines" to distinguish them from other lines built in 1861. Today, approximately 3,000 feet of these lines still exist in very good condition on a 17.3 acre tract of land that represent a portion of the Dill Tract. The tract and earthworks (archaeological site 38CH 195) are part of a noncontiguous district listed on the National Register of Historic Places and are …

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Mutational Analysis Of The Tra Locus Of The Broad-Host-Range Streptomyces Plasmid Pij101, Gregg S. Pettis, Stanley N. Cohen Aug 2000

Mutational Analysis Of The Tra Locus Of The Broad-Host-Range Streptomyces Plasmid Pij101, Gregg S. Pettis, Stanley N. Cohen

Faculty Publications

The tra gene of Streptomyces lividans plasmid pIJ101 encodes a 621- amino-acid protein that can mediate both plasmid transfer and the interbacterial transfer of chromosomal genes (i.e., chromosome-mobilizing ability [Cma]) during mating. Here we report the results of in-frame insertional mutagenesis studies aimed at defining regions of Tra required for these functions. While hexameric linker insertions throughout the tra gene affected plasmid and chromosomal gene transfer, insertions in a 200-amino- acid region of the Tra protein that contains presumed nucleotide-binding motifs and that is widely conserved among a functionally diverse family of bacterial and plasmid proteins (K. J. Begg, S. …

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Synchrotron X-Ray Microtomography, Electron Probe Microanalysis, And Nmr Of Toluene Waste In Cement, Leslie G. Butler, John W. Owens, Frank K. Cartledge, Richard L. Kurtz, Gary R. Byerly, Andrew J. Wales, Pamela L. Bryant, Earl F. Emery, Betsy Dowd, Xiaogang Xie Aug 2000

Synchrotron X-Ray Microtomography, Electron Probe Microanalysis, And Nmr Of Toluene Waste In Cement, Leslie G. Butler, John W. Owens, Frank K. Cartledge, Richard L. Kurtz, Gary R. Byerly, Andrew J. Wales, Pamela L. Bryant, Earl F. Emery, Betsy Dowd, Xiaogang Xie

Faculty Publications

Synchrotron X-ray microtomography shows vesicular structures for toluene/cement mixtures, prepared with 1.22-3.58 wt % toluene. Three-dimensional imaging of the cured samples shows spherical vesicles, with diameters ranging from 20 to 250/μm; a search with EPMA for vesicles in the range of 1-20/μm proved negative. However, the total vesicle volume, as computed from the microtomography images, accounts for less than 10% of initial toluene. Since the cements were cured in sealed bottles, the larger portion of toluene must be dispersed within the cement matrix. Evidence for toluene in the cement matrix comes from 29Si MAS NMR spectroscopy, which shows a reduction …

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Aintegumenta Promotes Petal Identity And Acts As A Negative Regulator Of Agamous, Beth A. Krizek, Valerie Prost, Anthony Macias Aug 2000

Aintegumenta Promotes Petal Identity And Acts As A Negative Regulator Of Agamous, Beth A. Krizek, Valerie Prost, Anthony Macias

Faculty Publications

The Arabidopsis AINTEGUMENTA (ANT) gene has been shown previously to be involved in ovule development and in the initiation and growth of floral organs. Here, we show that ANT acts in additional processes during flower development, including repression of AGAMOUS (AG) in second whorl cells, promotion of petal epidermal cell identity, and gynoecium development. Analyses of ap2-1 ant-6 double mutants reveal that ANT acts redundantly with AP2 to repress AG in second whorl cells. The abaxial surface of ant petals contains features such as stomata and elongated, interdigitated cells that are not present on wild-type petals. …

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Children's Understanding Of The Concept Of Physical Activity, Stewart G. Trost, Angela M. Morgan, Ruth P. Saunders, Gwen A. Felton, Dianne S. Ward, Russell R. Pate Aug 2000

Children's Understanding Of The Concept Of Physical Activity, Stewart G. Trost, Angela M. Morgan, Ruth P. Saunders, Gwen A. Felton, Dianne S. Ward, Russell R. Pate

Faculty Publications

This study evaluated 4th-grade students' understanding of the concept of physical activity and assessed the effects of two interventions to enhance the students' understanding of this concept. Students were randomly assigned to 1 of 3 conditions: the video group (n=40) watched a 5-min video describing physical activity; the verbal group (n=42) listened to a generic description of physical activity; the control group received no instruction (n=45). Students completed a 17-item checklist testing their understanding of the concept of physical activity. Compared to controls, students in the verbal and video group demonstrated significantly higher checklist …

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A Library ‘Teens’Cape’ Against The New Callousness, Anthony Bernier Aug 2000

A Library ‘Teens’Cape’ Against The New Callousness, Anthony Bernier

Faculty Publications

No abstract provided.

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Flux Of Nutrients From Russian Rivers To The Arctic Ocean: Can We Establish A Baseline Against Which To Judge Future Changes?, R. M. Holmes, B. J. Peterson, V. V. Gordeev, A. V. Zhulidov, M. Meybeck, Richard B. Lammers, Charles J. Vorosmarty Aug 2000

Flux Of Nutrients From Russian Rivers To The Arctic Ocean: Can We Establish A Baseline Against Which To Judge Future Changes?, R. M. Holmes, B. J. Peterson, V. V. Gordeev, A. V. Zhulidov, M. Meybeck, Richard B. Lammers, Charles J. Vorosmarty

Faculty Publications

Climate models predict significant warming in the Arctic in the 21st century, which will impact the functioning of terrestrial and aquatic ecosystems as well as alter land‐ocean interactions in the Arctic. Because river discharge and nutrient flux integrate large‐scale processes, they should be sensitive indicators of change, but detection of future changes requires knowledge of current conditions. Our objective in this paper is to evaluate the current state of affairs with respect to estimating nutrient flux to the Arctic Ocean from Russian rivers. To this end we provide estimates of contemporary (1970s–1990s) nitrate, ammonium, and phosphate fluxes to the Arctic …

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Masses For Galactic Beat Cepheids, Noella L. D'Cruz, Siobahn M. Morgan, Erika Böhm-Vitense Aug 2000

Masses For Galactic Beat Cepheids, Noella L. D'Cruz, Siobahn M. Morgan, Erika Böhm-Vitense

Faculty Publications

Accurate mass determinations for Cepheids may be used to determine the degree of excess mixing in the interiors of their main-sequence progenitors : the larger the excess mixing, the larger the luminosity of the Cepheid of a given mass, or the smaller the mass of a Cepheid with given luminosity. Dynamical masses determined recently for a few Cepheid binaries indicate excess mixing somewhat stronger than that corresponding to the convective overshoot models by Schaller et al. Beat Cepheids can be used similarly to test main-sequence mixing in stellar interiors. The period ratios for beat Cepheids depend on luminosity, heavy element …

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The Influence Of The Pressure Head On The Indonesian Seas Circulation, William H. Burnett, Vladimir M. Kamenkovich, George L. Mellor, Arnold L. Gordon Aug 2000

The Influence Of The Pressure Head On The Indonesian Seas Circulation, William H. Burnett, Vladimir M. Kamenkovich, George L. Mellor, Arnold L. Gordon

Faculty Publications

A high resolution, regional, non-linear, barotropic ocean model (2D POM) was used to show that a pressure difference between the Pacific and Indian Ocean does not significantly influence the total transport of the Indonesian throughflow.

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Confronting Difficulties Associated With Pre-Service Teacher Preparation Technology Apprehension: A Case Study., J. Francisco Hidalgo, Michael T. Miller, Mei-Yan Lu Aug 2000

Confronting Difficulties Associated With Pre-Service Teacher Preparation Technology Apprehension: A Case Study., J. Francisco Hidalgo, Michael T. Miller, Mei-Yan Lu

Faculty Publications

Developments in computer technology have altered the teaching and learning process, particularly in areas of teacher preparation. Teacher education, perhaps more than any other academic discipline, utilizes the application of computer technology in human resources for both the actions of teaching and learning content and the actions of preparing others to use technology. The California State University System (CSU) has responded to the need for technologically enhanced learning by establishing specific behavior/knowledge standards for teacher education candidates. San Jose State University (SJSU) is one of the leading institutions to coordinate an institutional response to the need for technology-assisted training of …

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Practicality Of Large Mylar Bags To Store Corn And Beans In Kenya, Byu Food Quality Assurance Laboratory Aug 2000

Practicality Of Large Mylar Bags To Store Corn And Beans In Kenya, Byu Food Quality Assurance Laboratory

Faculty Publications

The purpose of this study is to determine the practicality of using extra large zip-lock mylar bags with oxygen absorber packets to store corn and beans in Chyulu, Kenya. Weevil usually gets in the food after about 5 months, so if the oxygen can be maintained at a low level, the corn and beans could be stored for longer than that. The goal is to be able to store the food for 18 months. In order to determine the practicality of using the mylar bags to store corn and beans, the following questions will need to be answered: · Are …

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