Digital Commons Network^™

Volcanic Aerosol Records And Tephrochronology Of The Summit, Greenland, Ice Cores, Gregory A. Zielinski, Paul A. Mayewski, L. David Meeker, Karl Gronvold, Mark S. Germani, Sallie I. Whitlow, Mark S. Twickler, Kendrick C. Taylor

Faculty Publications

The recently collected Greenland Ice Sheet Project 2 (GISP2) and Greenland Ice Core Project ice cores from Summit, Greenland, provide lengthy and highly resolved records of the deposition of both the aerosol (H2SO4) and silicate (tephra) components of past volcanism. Both types of data are very beneficial in developing the hemispheric to global chronology of explosive volcanism and evaluating the entire volcanism‐climate system. The continuous time series of volcanic SO42− for the last 110,000 years show a strong relationship between periods of increased volcanism and periods of climatic change. The greatest number of volcanic SO42− signals, many of very high …

Observation Of Scaling Violations In Scaled Momentum Distributions At Hera, J. Breitweg, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, R. Yoshida, H. Zhang, Margarita C. K. Mattingly, 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, M. Corradi, S. De Pasquale, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti

Faculty Publications

Charged particle production has been measured in deep inelastic scattering (DIS) events over a large range of x and Q2 using the ZEUS detector. The evolution of the scaled momentum, xp, with Q2, in the range 10 to 1280 GeV2, has been investigated in the current fragmentation region of the Breit frame. The results show clear evidence, in a single experiment, for scaling violations in scaled momenta as a function of Q2. © 1997 Elsevier Science B.V.

Observation Of Isolated High-ET Photons In Photoproduction At Hera: Zeus Collaboration, J. Breitweg, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, R. Yoshida, H. Zhang, Margarita C. K. Mattingly, 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, M. Corradi, S. De Pasquale, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti

Faculty Publications

Events containing an isolated prompt photon with high transverse energy, together with a balancing jet, have been observed for the first time in photoproduction at HERA. The data were taken with the ZEUS detector, in a γp centre of mass energy range 120-250 GeV. The fraction of the incoming photon energy participating in the production of the prompt photon and the jet, xγ, shows a strong peak near unity, consistent with LO QCD Monte Carlo predictions. In the transverse energy and pseudorapidity range 5 ≤ EγT < 10 GeV, -0.7 ≤ ηγ < 0.8, EjetT ≥ 5 GeV, and -1.5 ≤ ηjet ≤ 1.8, with xOBSγ > 0.8, the measured cross section is 15.3 ± 3.8 ± 1.8 pb, in good …

Simulating Ozone Effects On Forest Productivity: Interactions Among Leaf‐, Canopy‐, And Stand‐Level Processes, Scott V. Ollinger, John D. Aber, Peter B. Reich

Faculty Publications

Ozone pollution in the lower atmosphere is known to have adverse effects on forest vegetation, but the degree to which mature forests are impacted has been very difficult to assess directly. In this study, we combined leaf‐level ozone response data from independent ozone fumigation studies with a forest ecosystem model in order simulate the effects of ambient ozone on mature hardwood forests. Reductions in leaf carbon gain were determined as a linear function of ozone flux to the leaf interior, calculated as the product of ozone concentration and leaf stomatal conductance. This relationship was applied to individual canopy layers within …

Robotic Tcf And Rigid-Body Calibration Methods, Edward Red, Xuguang Wang

Faculty Publications

For off-line programming to work, systematic methods must be developed to account for non-ideal performance of the parts and devices in the manufacturing cell. Although much of the literature focuses on robot inaccuracy, this paper considers practical methods for the tool control frame (TCF) calibration and rigid-body compensation required to close the inverse kinematics loop for target driven tasks.

Large Quantum Gravity Effects: Backreaction On Matter, Rodolfo Gambini, Jorge Pullin

Faculty Publications

We re-examine the large quantum gravity effects discovered by Ashtekar in the context of (2 + 1)-dimensional gravity coupled to matter. We study an alternative one-parameter family of coherent states of the theory in which the large quantum gravity effects on the metric can be diminished, at the expense of losing coherence in the matter sector. Which set of states is the one that occurs in nature will determine if the large quantum gravity effects are actually observable as wild fluctuations of the metric or rapid loss of coherence of matter fields. © World Scientific Publishing Company.

Where Are We Now?: Life After Electromation, Rafael Gely

Faculty Publications

Given the expectations that preceded the Board's decisions, and the reactions that followed, it is somewhat surprising how little attention has been given to the decisions the NLRB has issued since Electromation and E.I. du Pont. While in general these recent decisions are consistent with the holdings in Electromation and E.I. du Pont, they provide us with the opportunity to analyze the manner in which the Board is currently dealing with the legality of workplace cooperative efforts. This article explores that issue. Part II of the article provides a brief overview of the workplace cooperative efforts problem. Part III reviews …

Review Of Bibleworks For Windows 3.5, Gerald Klingbeil

Faculty Publications

No abstract provided.

Evaluation Of Special Sensor Microwave/Imager Satellite Data For Regional Soil Moisture Estimation Over The Red River Basin, Venkataraman Lakshmi, Eric F. Wood, Bhaskar J. Choudhury

Faculty Publications

Regional-scale estimation of soil moisture using in situ field observations is not possible due to problemswith the representativeness of the sampling and costs. Remotely sensed satellite data are helpful in this regard.Here, the simulations of 19- and 37-GHz vertical and horizontal polarization brightness temperatures and estimationof soil moistures using data from the Special Sensor Microwave/Imager (SSM/I) for 798 0.258 3 0.258boxes in the southwestern plains region of the United States for the time period between 1 August 1987 and31 July 1988 are presented. A coupled land-canopy–atmosphere model is used for simulating the brightnesstemperatures. The land-surface hydrology is modeled using a …

The Coexistence Of Multiple Distribution Systems For Financial Services: The Case Of Property-Liability Insurance, Allen N. Berger, J. David Cummins, Mary A. Weiss

Faculty Publications

Property-liability insurance is distributed through a direct-writer system, where agents represent one insurer, and an independent- agency system, where agents represent several insurers. Independent-agency insurers have higher costs than direct writers. The market- imperfections hypothesis attributes the coexistence of the two types of insurers to impediments to competition, while the product-quality hypothesis holds that independent-agency insurers provide higher-quality services. We measure cost efficiency and profit efficiency for property-liability insurers and find strong support for the product-quality hypothesis, implying that independent-agency insurers produce higher-quality outputs and are compensated by higher revenues.

Reshaping The Bedrock Of Democracy: American Jury Reform During The Past 30 Years, G. Thomas Munsterman, Paula Hannaford-Agor

Faculty Publications

In this article, we explore three broad areas of jury reform--administrative, structural, and procedural--as well as the problems they were intended to address and the consequences, both good and bad, that resulted from their implementation.

This abstract has been taken from the author's introduction.

Lifestyles Of The Not-So-Rich Or Famous: The Role Of Choice And Sacrifice In Bankruptcy, A. Mechele Dickerson

Faculty Publications

No abstract provided.

Fighting Bad Guys With International Trade Law, Raj Bhala

Faculty Publications

No abstract provided.

Restating Capitalization Standards And Rules: The Case For "Rough Justice" Regulations (Part Two), John W. Lee, Eldridge Blanton, Veena Luthra, Glenn Walberg, Darryl Whitesell

Faculty Publications

No abstract provided.

Measurement Of The Proton Structure Function F2 And ΣΓ*ΡTot At Low Q2 And Very Low X At Hera, J. Breitweg, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, R. Yoshida, H. Zhang, Margarita C. K. Mattingly, E. Anselmo, R. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, S. De Pasquale, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti

Faculty Publications

A small electromagnetic sampling calorimeter, installed in the ZEUS experiment in 1995, significantly enhanced the acceptance for very low x and low Q2 inelastic neutral current scattering, e+p → e+X, at HERA. A measurement of the proton structure function F2 and the total virtual photon-proton (γ*p) cross-section is presented for 0.11 ≤ Q2 ≤ 0.65 GeV2 and 2 × 10-6 ≤ x ≤ 6 × 10-5, corresponding to a range in the γ*p c.m. energy of 100 ≤ W ≤ 230 GeV. Comparisons with various models are also presented. © 1997 Published by Elsevier Science B.V.

D* Production In Deep Inelastic Scattering At Hera, J. Breitweg, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, R. Yoshida, H. Zhang, Margarita C. K. Mattingly, F. Anselmo, R. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, S. De Pasquale, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti

Faculty Publications

This paper presents measurements of D*f± production in deep inelastic scattering from collisions between 27.5GeV positrons and 820GeV protons. The data have been taken with the ZEUS detector at HERA. The decay channel D*+ → (D0 → K-π+)π+ (+c.c.) has been used in the study. The e+p cross section for inclusive D*± production with 5 < Q2 < 100GeV2 and y < 0.7 is 5.3±1.0±0.8nb in the kinematic region 1.3 < pT(D*±) < 9.0GeV and |η(D*±) | < 1.5. Differential cross sections as functions of pT(D*±), η(D*±), W and Q2 are compared with next-to-leading order QCD calculations based on the photon-gluon fusion production mechanism. After an extrapolation of the cross section to the full kinematic region in pT(D*±) and η(D*±), the charm contribution Fcc̄2(x,Q2) to the proton structure function is determined for Bjorken x between 2 · 10-4 and 5 · 10-3. © 1997 Elsevier Science B.V.

Azimuthal Modulation Of C-Band Scatterometer Over Southern Ocean Sea Ice, David G. Long, David S. Early

Faculty Publications

In a continuing evaluation of the ERS-1 C-band scatterometer as a tool for studying polar sea ice, the authors evaluate the azimuthal modulation characteristics of Antarctic sea ice. ERS-1 AMI scatterometer mode data sets from several study regions dispersed in the Antarctic seasonal sea ice pack are evaluated for azimuthal modulation. When appropriate, the incidence angle dependence is estimated and removed in a study region before determining whether azimuthal modulation is present in the data. Other comparisons are made using the fore and aft beam measurement difference. The results show that over the ice pack, azimuthal modulation is less than …

Autopsy In The Cancer Patient: The Nurse's Role, Patricia Rushton

Faculty Publications

Nurses spend many hours with dying cancer patients, developing close relationships with both the patients and their families. However, nurses are frequently not involved in the process of requesting an autopsy, either by choice or tradition. During this time of great stress, the nurse can be more involved. The nurse who understands the reasons for autopsy and its ramification for the grieving process can be actively involved in supporting the physician who makes the request and the family members who must make the this difficult decision. It is possible that the nurse can be the health team member designated to …

Courtroom Technology - An Introduction To The Onrushing Future, Fredric I. Lederer, Samuel H. Solomon

Faculty Publications

No abstract provided.

“Crossing The Great Plains: A Sesquicentennial Look At The 1847 Mormon Pioneer Trek West.”, Jay H. Buckley

Faculty Publications

A Sesquicentennial Look at the 1847, 1897, 1947, and 1997 commemorations of the Mormon Pioneer Trek West.

Nephite Kingship Reconsidered, Noel B. Reynolds

Faculty Publications

This paper extends and updates previous efforts to understand the political dynamic of the Book of Mormon by looking at four themes or issues that can be developed from the text itself. The first is an expansion of earlier treatments of the contradictory political ideologies of the Nephites and Lamanites, which informed relations between these two groups across their thousand-year history. The second is an exploration of the historical possibility that Nephi may never, in fact, have been anointed as king of the Nephite people, which raises in turn a possible need to reassess the character of Nephite kingship. The …

Bis[(Anhydro-Meso-Rhodochlorinato-Xv Methyl Ester)Zinc(Ii)], Mathias O. Senge, Kevin M. Smith

Faculty Publications

The title compound, bis[(methyl 8,13-diethyl-2,21,22,2 3-tetrahydro-3,7,12,17-tetramethyl-2 3-oxo-3H-benzo[at]-porphyrin-18-carboxylato-κ4N) zinc (II)], [Zn(C33H34-N4O3)]2, has similar structural characteristics to the naturally occurring factor F430 and forms dimers that are held together by axial interactions between the zinc(II) center and the cyclohexanone carbonyl O atom of a neighboring macrocycle [Zn - O3 2.204 (3) Å]. These dimers form infinite stacks in the crystal stabilized by π-π interactions between the aromatic ring systems.

Age-Dependent Increase In Ortho-Tyrosine And Methionine Sulfoxide In Human Skin Collagen Is Not Accelerated In Diabetes: Evidence Against A Generalized Increase In Oxidative Stress In Diabetes, Mary C. Wells-Knecht, Timothy J. Lyons, David R. Mccance, Suzanne R. Thorpe, John W. Baynes

Faculty Publications

The glycoxidation products Nepsilon-(carboxymethyl)lysine and pentosidine increase in skin collagen with age and at an accelerated rate in diabetes. Their age-adjusted concentrations in skin collagen are correlated with the severity of diabetic complications. To determine the relative roles of increased glycation and/or oxidation in the accelerated formation of glycoxidation products in diabetes, we measured levels of amino acid oxidation products, distinct from glycoxidative modifications of amino acids, as independent indicators of oxidative stress and damage to collagen in aging and diabetes. We show that ortho-tyrosine and methionine sulfoxide are formed in concert with Nepsilon-(carboxymethyl)lysine and pentosidine during glycoxidation of collagen …

In Vivo Kinetics Of A Redox-Regulated Transcriptional Switch, Huangen Ding, Bruce Demple

Faculty Publications

SoxR is a transcription activator governing a cellular response to superoxide and nitric oxide in Escherichia coli. SoxR protein is a homodimer, and each monomer has a redox-active [2Fe-2S] cluster. Oxidation and reduction of the [2Fe-2S] clusters can reversibly activate and inactivate SoxR transcriptional activity. Here, we use electron paramagnetic resonance spectroscopy to follow the redox-switching process of SoxR protein in vivo. SoxR [2Fe-2S] clusters were in the fully reduced state during normal aerobic growth, but were completely oxidized after only 2-min aerobic exposure of the cells to superoxide-generating agents such as paraquat. The oxidized SoxR [2Fe-2S] clusters were rapidly …

Property Fields In An Effluent Plume Of The Mississippi River, G. L. Hitchcock, W. J. Wiseman, W. C. Boicourt, A. J. Mariano, N. Walker, T. A. Nelsen, E. Ryan

Faculty Publications

Surface property distributions were mapped in the Mississippi River plume during May and August, 1993 while following surface drifters. Prevailing winds were the primary factor controlling the orientation of the plume. In May, under typical southeasterly winds, the plume turned anticyclonically towards the coast, while in August, under anomalous westerly winds, the plume turned east. Remote imagery of sea surface temperature and suspended sediments confirmed the direction of the plume. Optimally interpolated maps of surface salinity, temperature, chlorophyll a fluorescence, and transmissivity from underway sampling, and periodic nutrient samples, reveal the plume structure. In May concentrations of nitrate, silicate, and …

The Dialectic In Contemporary Egyptian Social Thought: The Scripturalist And Modernist Discourses Of Sayyid Qutb And Hasan Hanafi, Shahrough Akhavi

Faculty Publications

No abstract provided.

Evolution And Nebulousness In Theories, Barry N. Markovsky

Faculty Publications

Social scientists have a clear choice in how they may approach theory development. One path leads to "nebulous" theories that lack any real explanatory power. The other path capitalizes on evolutionary principles of variation and selection, vastly increasing the chances for explanatory success. I illustrate these ideas by reference to "artificial life" programs, and discuss the implications for theory construction in the social sciences.

Singular And Plural Non-Deterministic Parameters, Sigurd Meldal, M. A. Walicki

Faculty Publications

The article defines algebraic semantics of singular (call-time-choice) and plural (run-time-choice) nondeterministic parameter passing and presents a specification language in which operations with both kinds of parameters can be defined simultaneously. Sound and complete calculi for both semantics are introduced. We study the relations between the two semantics and point out that axioms for operations with plural arguments may be considered as axiom schemata for operations with singular arguments.

Monetary Policy Preferences Of Individual Fomc Members: A Content Analysis Of The Memoranda Of Discussion, Henry W. Chappell Jr., Thomas M. Havrilesky, Rob Roy Mcgregor

Faculty Publications

The Memoranda of Discussion provide detailed records of Federal Open Market Committee (FOMC) meeting deliberations. Procedures are developed for coding the textual data in the Memoranda and assessing the reliability of those codings. The codings are then used in the estimation of parameters of individual FOMC members' reaction functions. Data from the 1970 to 1976 period are employed in the estimation. In the future, similar methods could be used to analyze newly released transcripts of FOMC meetings held after 1976.

Places In The Heartland: Departure Jurisprudence After Koon, Frank O. Bowman Iii

Faculty Publications

There are two things upon which I suspect most observers will agree following the decision in Koon v. United States. First, the United States Supreme Court wants district courts to have more discretion to depart from the otherwise applicable guideline range, and wants appellate courts to have less authority to overturn those discretionary judgments. Second, in light of the conflicting signals the Court gave by, on the one hand, declaring that the standard of appellate review for departure decisions is to be abuse of discretion,” and on the other hand, finding that two of the five factors relied upon by …