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The Effect Of Domain Knowledge On Elementary School Children's Search Behavior On An Information Retrieval System: The Science Library Catalog, Sandra Hirsh May 1995

The Effect Of Domain Knowledge On Elementary School Children's Search Behavior On An Information Retrieval System: The Science Library Catalog, Sandra Hirsh

Faculty Publications

Few information retrieval systems are designed with children’s special needs and capabilities in mind. We need to learn more about children’s information-seeking behavior in order to provide them with information-based tools which support exploratory learning. This dissertation examines children’s search behavior on a hypertext-based automated library catalog designed for elementary school children. The focus of this research is on the effect of domain knowledge on children’s search performance, search behavior, and learning as they look for science books on this system. Reseaxch has shown that level of domain knowledge in~luences the way people search for information. Data was collected through …

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Study Of D* (2010)± Production In Ep Collisions At Hera, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz Apr 1995

Study Of D* (2010)± Production In Ep Collisions At Hera, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz

Faculty Publications

We report the first observation of charmed mesons with the ZEUS detector at HERA using the decay channel D*+ → (D0 → K-π+)π+ (+c.c.). Clear signals in the mass difference ΔM=M(D*)-M(D0) as well as in the M(Kπ) distribution at the D0 mass are found. The ep cross section for inclusive D*± production with Q2 < 4 GeV2 in the γp centre-of-mass energy range 115 < W < 275 GeV has been determined to be (32±7-7+4) nb in the kinematic region pt(D*) ≥ 1.7 GeV, |η(D*)| < 1.5. Extrapolating outside this region, assuming a mass of the charm quark of 1.5 GeV, we estimate the ep charm cross section to be σ(ep → ccX) = (0.45 ± 0.11-0.22+0.37) μb at s=296 GeV and 〈W〉 = 198 GeV. The average γp charm cross section σ(γp → ccX) is found to be (6.3 ± 2.2-3.0+6.3) μb at 〈W〉 = 163 GeV and (16.9 ± 5.2-8.5+13.9) μb at 〈W〉 = 243 GeV. The increase of the total charm photoproduction cross section by one order of magnitude with respect to low energy data experiments is well described by QCD NLO calculations using singular gluon distributions in the proton. © 1995.

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Dijet Cross Sections In Photoproduction At Hera, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz Apr 1995

Dijet Cross Sections In Photoproduction At Hera, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz

Faculty Publications

Dijet production by almost real photons has been studied at HERA with the ZEUS detector. Jets have been identified using the cone algorithm. A cut on xγOBS, the fraction of the photon energy participating in the production of the two jets of highest transverse energy, is used to define cross sections sensitive to the parton distributions in the proton and in the photon. The dependence of the dijet cross sections on pseudorapidity has been measured for xγOBS ≥ 0.75 and xγOBS < 0.75. The former is sensitive to the gluon momentum density in the proton. The latter is sensitive to the ginon in the photon. The cross sections are corrected for detector acceptance and compared to leading order QCD calculations. © 1995.

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Generalized Pseudo-Su(3) Model And Pairing, D. Troltenier, C. Bahri, J. P. Draayer Apr 1995

Generalized Pseudo-Su(3) Model And Pairing, D. Troltenier, C. Bahri, J. P. Draayer

Faculty Publications

The pseudo-SU(3) model is extended to explicitly include the spin and proton-neutron degrees of freedom. A general formalism for evaluating matrix elements of one-body and two-body tensor operators within this framework is presented. The pairing interaction, which couples different irreducible representations of SU(3), is expressed in terms of pseudo-space tensors and a general result is given for calculating its matrix elements. The importance of pairing correlations in pseudo-SU(3) model calculations is demonstrated by examining the dependence of wavefunctions, low-energy collective excitation spectra, and moments of inertia on the strength of the pairing interaction. © 1995.

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On The Verge Of The Millennium: A History Of The Interpretation Of Revelation, Craig R. Koester Apr 1995

On The Verge Of The Millennium: A History Of The Interpretation Of Revelation, Craig R. Koester

Faculty Publications

The power of a book can be seen in its effects, and few books have had more dramatic effects than Revelation. Attempts to control the effects of the book by ignoring it or dismissing it have not been successful; Revela- tion’s secrets are too alluring. We do better to consider the effects the book has had on Christians over the centuries and to let this history of influence help shape a way to read the book that is both faithful and compelling.

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Outpatient Civil Commitment In North Carolina: Constitutional And Policy Concerns, Erika Lietzan Apr 1995

Outpatient Civil Commitment In North Carolina: Constitutional And Policy Concerns, Erika Lietzan

Faculty Publications

This article examines preventive outpatient commitment, which targets those not ill or dangerous enough to be committed to inpatient facilities under state commitment laws. After discussing the history and design of the NC scheme, it explores constitutional and practical difficulties. Ultimately, it argues that individualized case management through local mental health clinics is the more effective and humane way of serving the interests of both the individual and the state.

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Health Care Rationing And Disability Rights, Philip G. Peters Jr. Apr 1995

Health Care Rationing And Disability Rights, Philip G. Peters Jr.

Faculty Publications

This article explores the extent to which federal disability rights law limits the use of effectiveness criteria to allocate health care, either alone or as a part of cost-effectiveness analyses. To be more precise, it considers the circumstances in which disability-based classifications by health plans which would otherwise violate the anti-discrimination laws can be legally and ethically defended by proof that the excluded treatments are less effective than those which are provided. Part I introduces the expanding use of effectiveness analysis in health care, explains its discriminatory potential, and reviews the Oregon experience. Part II outlines the current federal law …

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Children's Rights In Intercountry Adoption: Towards A New Goal, S. I. Strong Apr 1995

Children's Rights In Intercountry Adoption: Towards A New Goal, S. I. Strong

Faculty Publications

Each year, hundreds of thousands of children languish in foster or institutional care worldwide, while at the same time, thousands of adults, married and unmarried alike, are denied children because of “shortages.” How did this tragedy occur, and why does it continue to be repeated daily in countries around the world? The unfortunate truth is that many of the legal and societal norms now in place effectively prohibit needy children from finding suitable homes. While potential parents in Western countries cry out for babies of their own, millions of children live in physical and psychological poverty in underfunded orphanages around …

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Rethinking Proceeds: The History, Misinterpretation And Revision Of U.C.C. Section 9-306, R. Wilson Freyermuth Apr 1995

Rethinking Proceeds: The History, Misinterpretation And Revision Of U.C.C. Section 9-306, R. Wilson Freyermuth

Faculty Publications

This article provides a careful analysis of the proper scope of the term “proceeds” under Section 9-306. Parts II and III develop a coherent conception of the term “proceeds” by focusing upon the proper interpretation of Section 9-306 in its current form. Part II evaluates the passage of title conception of proceeds in light of the 1972 and 1987 amendments to Article 9 and demonstrates that this conception is fundamentally inconsistent with the economic, value-based conception of proceeds that emerges from those amendments. Using this emerging conception of proceeds, which focuses upon the occurrence of an event that exhausts or …

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Striker Replacements: A Law, Economics, And Negotiations Approach, Rafael Gely, Leonard Bierman Apr 1995

Striker Replacements: A Law, Economics, And Negotiations Approach, Rafael Gely, Leonard Bierman

Faculty Publications

In this article, we directly attack Professors Wachter and Cohen's assertion regarding the economic efficiency of the Mackay doctrine. Applying internal and external labor market analysis, we argue that the Mackay doctrine is economically inefficient because it allows employers to behave “opportunistically” with respect to employees that have made “firm-specific” investments in their employing firms. To remedy this problem we propose a new “negotiations approach,” the components of which are: (1) the statutory overruling of Mackay, and (2) the concomitant amendment of the NLRA to make the striker replacement issue a “mandatory” subject of collective bargaining.

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The New Federalism, Richard C. Reuben Apr 1995

The New Federalism, Richard C. Reuben

Faculty Publications

the 10th Amendment was something they noted for the bar exam and then promptly forgot about. But for many conservative lawyers and politicians, the 10th Amendment- which reserves to the states all powers not given to the federal government-has been anything but academic. For them, it embodies the founders' promise for a nation in which the states and federal government are near-equal partners. And they have fought long and hard to give the amendment its proper due. As the rise of House Speaker Newt Gingrich, R-Ga., and his Contract with America attest, their day may have finally come. Today, federalism, …

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A Reverse Isoperimetric Inequality, Stability And Extremal Theorems For Plane-Curves With Bounded Curvature, Ralph Howard, Andrejs Treibergs Apr 1995

A Reverse Isoperimetric Inequality, Stability And Extremal Theorems For Plane-Curves With Bounded Curvature, Ralph Howard, Andrejs Treibergs

Faculty Publications

No abstract provided.

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Accuracy Of Deoxynucleotide Incorporation By Soybean Chloroplast Dna-Polymerases Is Independent Of The Presence Of A 3' To 5' Exonuclease, J. Clinton Bailey Ii, Sabine Heinhorst, Gordon C. Cannon Apr 1995

Accuracy Of Deoxynucleotide Incorporation By Soybean Chloroplast Dna-Polymerases Is Independent Of The Presence Of A 3' To 5' Exonuclease, J. Clinton Bailey Ii, Sabine Heinhorst, Gordon C. Cannon

Faculty Publications

DNA polymerase was purified from soybean (Glycine max) chloroplasts that were actively replicating DNA. The main form (form I) of the enzyme was associated with a low level of 3' to 5' exonuclease activity throughout purification, although the ratio of exonuclease to polymerase activity decreased with each successive purification step. A second form (form II) of DNA polymerase, which elutes from DEAE-cellulose at a higher salt concentration than form I, was devoid of any exonuclease activity. To assess the potential function of the 3' to 5' exonuclease in proofreading, the fidelity of deoxynucleotide incorporation was measured for form I DNA …

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Computer-Simulation Study Of The Permeability Of A Porous Sediment Model, Ras B. Pandey, Jeffrey L. Becklehimer Apr 1995

Computer-Simulation Study Of The Permeability Of A Porous Sediment Model, Ras B. Pandey, Jeffrey L. Becklehimer

Faculty Publications

A computer simulation model is used to study the permeability of fluid flow through porous media generated by the random distribution of the sediments in a two-dimensional lattice. Fluid particles are confined to pore space with the sediments forming the rigid barriers at the pore boundaries. An interaction between the fluid particles and the pore substrate is introduced to incorporate the additional drag in the pore space. The pressure gradient causes a bias to drive the fluid and the Metropolis algorithm is used to hop the fluid particles. The permeability of this system is studied as a function of the …

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Professional Books -- Competence, Courage, And Change: An Approach To Family Therapy By D. B. Waters And E. C. Lawrence, Dean M. Busby Apr 1995

Professional Books -- Competence, Courage, And Change: An Approach To Family Therapy By D. B. Waters And E. C. Lawrence, Dean M. Busby

Faculty Publications

In this book Waters and Lawrence present a model of family therapy that is refreshing and informative. They use principles from strength-focused paradigms without ignoring pathology. They call this emphasis "healthy intentions, unhealthy outcomes." In an innovative way Waters and Lawrence help clients uncover the competent strivings underlying pathological behaviors. Once these strivings are uncovered, the therapist and client can work together to find effective ways of reaching goals without engaging in destructive behaviors. Rather than ignore pathology and thereby negate clients' experiences, or overemphasize pathology and remove hope, the authors use pathology as the vehicle to understand the inner …

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The Aramaic Ostracon From Lachish: A New Reading And Interpretation, Gerald Klingbeil Apr 1995

The Aramaic Ostracon From Lachish: A New Reading And Interpretation, Gerald Klingbeil

Faculty Publications

No abstract provided.

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Dangerous Misperceptions: Protecting Police Officers, Society, And The Fourth Amendment Right To Personal Security, Kathryn R. Urbonya Apr 1995

Dangerous Misperceptions: Protecting Police Officers, Society, And The Fourth Amendment Right To Personal Security, Kathryn R. Urbonya

Faculty Publications

No abstract provided.

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The North American Agreement On Labor Cooperation: A New Frontier In North American Labor Relations, Rafael Gely, Leonard Bierman Apr 1995

The North American Agreement On Labor Cooperation: A New Frontier In North American Labor Relations, Rafael Gely, Leonard Bierman

Faculty Publications

During the debate leading to the passage of the North American Free Trade Agreement (“NAFTA”), a great deal of concern focused on the effect that a trade agreement such as the NAFTA might have on workers' rights. As a condition for the ratification of the NAFTA, Congress provided that the treaty would not “enter into force until the three countries enact their own national agreement on labor cooperation.” In response to this concern, the three signatory countries negotiated the North American Agreement on Labor Cooperation (“NAALC” or “Labor Agreement”). The NAALC establishes a formal and elaborate procedure to settle complaints …

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Premarital Sexual Coercion: Treatment Issues For Family Therapists, Kyle D. Killian, Dean M. Busby Apr 1995

Premarital Sexual Coercion: Treatment Issues For Family Therapists, Kyle D. Killian, Dean M. Busby

Faculty Publications

Premarital sexual coercion is defined as nonconsensual sexual activity between two persons who are not married to each other but who are involved in an intimate relationship with one another. Factors and consequences associated with premarital sexual coercion are presented, and three possible clinical scenarios are discussed.

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Observation Of Hard Scattering In Photoproduction Events With A Large Rapidity Gap At Hera, M. Derrick, D. Krakauer, S. Magill, B. Musgrave, J. Repond, J. Schlereth, R. Stanek, R. L. Talaga, J. Thron, F. Arzarello, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, F. Ciralli, A. Contin, S. D'Auria, F. Frasconi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti Mar 1995

Observation Of Hard Scattering In Photoproduction Events With A Large Rapidity Gap At Hera, M. Derrick, D. Krakauer, S. Magill, B. Musgrave, J. Repond, J. Schlereth, R. Stanek, R. L. Talaga, J. Thron, F. Arzarello, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, F. Ciralli, A. Contin, S. D'Auria, F. Frasconi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti

Faculty Publications

Events with a large rapidity gap and total transverse energy greater than 5 GeV have been observed in quasi-real photoproduction at HERA with the ZEUS detector. The distribution of these events as a function of the γp centre of mass energy is consistent with diffractive scattering. For total transverse energies above 12 GeV, the hadronic final states show predominantly a two-jet structure with each jet having a transverse energy greater than 4 GeV. For the two-jet events, little energy flow is found outside the jets. This observation is consistent with the hard scattering of a quasi-real photon with a colourless …

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Measurement Of Multiplicity And Momentum Spectra In The Current Fragmentation Region Of The Breit Frame At Hera, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, R. Avad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, I. Gialas, P. Giusti, G. Lacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz, F. Palmonari Mar 1995

Measurement Of Multiplicity And Momentum Spectra In The Current Fragmentation Region Of The Breit Frame At Hera, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, R. Avad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, I. Gialas, P. Giusti, G. Lacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz, F. Palmonari

Faculty Publications

Charged particle production has been measured in Deep Inelastic Scattering (DIS) events using the ZEUS detector over a large range of Q2 from 10 to 1280 GeV2. The evolution with Q of the charged multiplicity and scaled momentum has been investigated in the current fragmentation region of the Breit frame. The data are used to study QCD coherence effects in DIS and are compared with corresponding e+e- data in order to test the universality of quark fragmentation. © 1995 Springer-Verlag.

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Neutral Strange Particle Production In Deep Inelastic Scattering At Hera, M. Derick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz Mar 1995

Neutral Strange Particle Production In Deep Inelastic Scattering At Hera, M. Derick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz

Faculty Publications

This paper presents measurements of K0 and Λ production in neutral current, deep inelastic scattering of 26.7 GeV electrons and 820 GeV protons in the kinematic range 100.04. Average multiplicities for K0 and Λ production are determined for transverse momenta pT>0.5 GeV and pseudorapidities |η|<1.3. The multiplicities favour a stronger strange to light quark suppression in the fragmentation chain than found in e+e- experiments. The production properties of K0' s in events with and without a large rapidity gap with respect to the proton direction are compared. The ratio of neutral K0' s to charged particles per event in the measured kinematic range is, within the present statistics, the same in both samples. © 1995 Springer-Verlag.

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Jet Production In High Q2 Deep-Inelastic Ep Scattering At Hera, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, R. Avad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz Mar 1995

Jet Production In High Q2 Deep-Inelastic Ep Scattering At Hera, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, R. Avad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz

Faculty Publications

Two-jet production in deep-inelastic electron-proton scattering has been studied for 160

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Pulse Width Modulation Drive Technique For High Resolution Liquid Crystal Gratings, Gregory P. Nordin, S. T. Kowel, J. H. Kulick, R. G. Lindquist, P. J. Nasiatka, A. Thomsen Mar 1995

Pulse Width Modulation Drive Technique For High Resolution Liquid Crystal Gratings, Gregory P. Nordin, S. T. Kowel, J. H. Kulick, R. G. Lindquist, P. J. Nasiatka, A. Thomsen

Faculty Publications

We report the use of a pulse-width modulation drive technique for high-resolution liquid-crystal gratings and show how the grating diffraction efficiency depends on the duty cycle of the drive signal. We identify a regime in which the diffraction efficiency is linearly proportional to the duty cycle, thereby providing a linear drive characteristic.

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The Cat That Catches Mice: China's Challenge To The Dominant Privatization Model, Lan Cao Mar 1995

The Cat That Catches Mice: China's Challenge To The Dominant Privatization Model, Lan Cao

Faculty Publications

No abstract provided.

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Extraction Of The Gluon Density Of The Proton At X, M. Derrick, D. Krakauer, S. Magill, B. Musgrave, J. Repond, J. Schlereth, R. Stanek, R. L. Talaga, J. Thron, F. Arzarello, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, F. Ciralli, A. Contin, S. D'Auria, F. Frasconi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti Feb 1995

Extraction Of The Gluon Density Of The Proton At X, M. Derrick, D. Krakauer, S. Magill, B. Musgrave, J. Repond, J. Schlereth, R. Stanek, R. L. Talaga, J. Thron, F. Arzarello, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, F. Ciralli, A. Contin, S. D'Auria, F. Frasconi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti

Faculty Publications

The gluon momentum density xg(x, Q2) of the proton was extracted at Q2 = 20 GeV2 for small values of x between 4 × 10-4 and 10-2 from the scaling violations of the proton structure function F2 measured recently by ZEUS in deep inelastic neutral current ep scattering at HERA. The extraction was performed in two ways. Firstly, using a global NLO fit to the ZEUS data on F2 at low x constrained by measurementsfrom NMC at larger x; and secondly using published approximate methods for the solution of the GLAP QCD evolution equations. Consistent results are obtained. A substantial …

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Finite Dimensional Hida Distributions, Izumi Kubo, Hui Hsiung Kuo Feb 1995

Finite Dimensional Hida Distributions, Izumi Kubo, Hui Hsiung Kuo

Faculty Publications

Let E be a real Hilbert space and A a densely defined linear operator on E satisfying certain conditions. Let E ⊂ E ⊂ E* be the Gel′fand triple arising from E and A. Let μ denote the standard Gaussian measure on E* and let (L2) = L2(μ). The Wiener-Itô decomposition theorem for (L2) and the second quantization operator Γ(A)* can be used to introduce a Gel′fand triple (E) ⊂ (L2) ⊂ (E)*. The elements in (E)* and (E) are called Hida distributions and test functions, respectively. A Hida distribution φ is defined to be finite dimensional if there exists …

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Community Metabolism And Nutrient Cycling In The Mississippi River Plume: Evidence For Intense Nitrification At Intermediate Salinities, Joseph D. Pakulski, Ronald Benner, Rainer Amon, Brian Eadie, Terry Whitledge Feb 1995

Community Metabolism And Nutrient Cycling In The Mississippi River Plume: Evidence For Intense Nitrification At Intermediate Salinities, Joseph D. Pakulski, Ronald Benner, Rainer Amon, Brian Eadie, Terry Whitledge

Faculty Publications

Community respiration, net nutrient fluxes and heterotrophic bacterial production were investigated in the Mississippi River (USA) plume during May 1992 using dark bottle incubations of unfiltered water. Highest rates of community O2 consumption and dissolved inorganic carbon regeneration were observed at intermediate (10 to 27%0) plume salinities. Plume surface 02 consumption rates were 2- to 4-fold greater than rates reported previously during the summer and winter. Heterotrophic bacterial production ([3H]-leucine incorporation) was also highest at intermediate salinities and 2- to 4-fold greater than rates reported from other seasons. Net regeneration of NH4+ …

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Alternative Equations Of Motion For The Radiating Electron, G. W. Ford, R. F. O'Connell Feb 1995

Alternative Equations Of Motion For The Radiating Electron, G. W. Ford, R. F. O'Connell

Faculty Publications

We have previously written down a simple second-order equation for the radiating electron and pointed out that its solutions are well behaved. A key feature of this equation is the presence of a term involving the time derivative of the external field f(t). Here, we show that a completely equivalent, but less elegant, equation may be written down which contains no derivatives of f(t) but, instead, an infinite number of derivatives of the coordinate. However, it has the merit of displaying explicitly how our result differs from that of Abraham-Lorentz. © 1995 Springer-Verlag.

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The "Contract" And "Block Grants": The End Of Federal Food Programs?, Edward Steinman Feb 1995

The "Contract" And "Block Grants": The End Of Federal Food Programs?, Edward Steinman

Faculty Publications

No abstract provided.

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