Physical Sciences and Mathematics Commons^™

Fluorescence Analysis For Multi-Site Aluminum Binding To Natural Organic Matter, D. Scott Smith, James R. Kramer

Chemistry Faculty Publications

Natural organic matter (NOM) samples isolated from different water sources in Norway were compared using their fluorescence properties. Fluorescence surfaces were observed at pH 4.36 and deconvoluted using SIMPLISMA (Windig and Guilment 1991). There were a total of seven different fluorophores observed for these samples and each sampling site had between four and six ofthe fluorescent components. These components were observed to bind Al during titrations at the same pH. Multiresponse titration curves were fit using the method of Smith and Kramer (1998) and most of the binding strengths are similar to values for Suwannee River fulvic acid (1ogK’ between …

First Search For Cp Violation In Tau Lepton Decay, S. Anderson, Kenneth A. Bloom, Cleo Collaboration

Kenneth Bloom Publications

We have performed the first search for CP violation in tau lepton decay. CP violation in lepton decay does not occur in the minimal standard model but can occur in extensions such as the multi- Higgs doublet model. It appears as a characteristic difference between the τ^- and τ⁺ decay angular distributions for the semileptonic decay modes such as τ^- → K⁰ π^-ν. We define an observable asymmetry to exploit this and find no evidence for any CP violation.

Comment On "Beach Water Table Fluctuations Due To Wave Run-Up: Capillarity Effects" By L. Li Et Al., Vitaly A. Zlotnik

Department of Earth and Atmospheric Sciences: Faculty Publications

Vitaly A. Zlotnik's comment on "Beach water table fluctuations due to wave run-up: Capillarity effects" by L. Li, D. A. Barry, J.-Y. Parlange, and C. B. Pattiaratchi, published in Water Resources Research (1997) 3(5): 935-945.

Ionization Dynamics In Fast Ion-Atom Collisions. I. Energy And Angular Distributions Of Low-Energy Electrons Emitted In Ionization Of He By Bare Carbon Ions, Lokesh C. Tribedi, P. Richard, Y. D. Wang, C. D. Lin, L. Gulyas, M. Eugene Rudd

M. Eugene Rudd Publications

We have studied the two-center effect (TCE) in ion-atom ionization by measuring the energy and angular distributions of the double-differential cross sections (DDCSs) (d²σ/dεdΩ) of the low-energy electrons emitted in a collision of He atoms with 2.5 MeV/nucleon C⁶⁺ ions. The electrons with energies between 0.1 and 300 eV were detected for 13 different emission angles between 15° and 160°. From the measured DDCSs we have deduced the single differential cross sections such as dσ/dΩ and dσ/dε and the total cross section. The data have been …

Natural Math, Maria Droujkova

Humanistic Mathematics Network Journal

No abstract provided.

Do The Great While It Is Still Small: Humanistic Teaching In The Elementary School, John Eichinger

Humanistic Mathematics Network Journal

No abstract provided.

The Legend Of The Apple, Raul A. Simon

Humanistic Mathematics Network Journal

No abstract provided.

What Does Equality Mean?--The Basque View, Marcia Ascher

Humanistic Mathematics Network Journal

No abstract provided.

On Solving Equations, Negative Numbers, And Other Absurdities: Part Ii, Ralph A. Raimi

Humanistic Mathematics Network Journal

No abstract provided.

Solitary Waves For Two And Three Coupled Nonlinear Schrödinger Equations, Foek T. Hioe

Physics Faculty/Staff Publications

We present solitary-wave solutions of two and three coupled nonlinear Schrödinger equations when the waves propagate in the normal and anomalous group-velocity dispersion regions. A wave of the form sech² £-2/3 is found, which, together with two known waves of the forms tanh £ sech £ and sech² £, are shown to form a new generation of complementary waves. The implication of this wave set and its applications to coupled solitary-wave propagation is discussed.

Self-Enhancement Of Dynamic Gratings In Photogalvanic Crystals, Nickolai Kukhtarev, Sergei F. Lyuksyutov, Preben Buchhave, Tatiana Kukhtareva, K. Sayano, Partha P. Banerjee

Electrical and Computer Engineering Faculty Publications

We have developed a compact closed-form solution of the band transport model for high-contrast gratings in photogalvanic crystals. Our solution predicts the effect of the photoconductivity and the electric field grating enhancement due to the photogalvanic effect. We predict a pronounced dependence of the steady-state photogalvanic current on the contrast of the interference pattern and an increase of holographic storage time due to the enhancement of the photoconductivity grating contrast. In the high contrast limit and a large photogalvanic effect the refractive index grating will be shifted from the position of the intensity modulation pattern, contrary to the usually adopted …

Field Scale Variability Of Nitrogen And Δ15n In Soil And Plants, D. E. Clay, J. Chang, S. A. Clay, M. Ellsbury, C. G. Carlson, D. D. Malo, D. Woodson, T. Desttur

Agronomy, Horticulture and Plant Science Faculty Publications

Understanding the factors that influence soil and plant nitrogen (N) spatial variability may improve our ability to develop management systems that maximize productivity and minimize environmental hazards. The objective of this study was to determine the field (65 ha) scale spatial variability of N and δ¹⁵N in soil and corn (Zea mays). Soil, grain, and stover samples were collected from grids that ranged in size from 30 by 30 m to 60 by 60 m. Plant samples, collected following physiological maturity in 1995, were analyzed for total N and δ¹⁵N. Soil samples, collected prior …

Unidirectional Anisotropy In Ultrathin Transition-Metal Films , Ralph Skomski, H.-P. Oepen, J. Kirschner

Ralph Skomski Publications

Unidirectional magnetic anisotropies in low-symmetry magnetic thin films such as cobalt on vicinal copper surfaces are investigated. Possible explanations of the observed uniaxial anisotropies are competing anisotropy (CA) coefficients and Dzyaloshinskii-Moriya (DM) interactions. Unidirectional CA is an interesting mechanism occurring in low-symmetry magnets and involves neither antiferromagnetic exchange nor spin canting. It is visible in the easy-cone regime and decides, for example, whether the preferential magnetization direction points up or down a stepped surface. In the case of Co/Cu(11n) films, however, the anisotropy direction speaks in favor of DM-type interactions.

An Ab Initio Study Of Specific Solvent Effects On The Electronic Coupling Element In Electron Transfer Reactions, Thomas M. Henderson '98, Robert J. Cave

All HMC Faculty Publications and Research

Specific solvent effects on the electronic coupling element for electron transfer are examined using two model donor–acceptor systems (Zn2+ and Li2+) and several model “solvent” species (He, Ne, H2O, and NH3). The effects are evaluated relative to the given donor–acceptor pair without solvent present. The electronic coupling element (Hab) is found to depend strongly on the identity of the intervening solvent, with He atoms decreasing Hab, whereas H2O and NH3 significantly increase Hab. The distance dependence (essentially exponential decay) is weakly affected by a single intervening solvent atom–molecule. However, when the donor–acceptor distance increases in concert with addition of successively …

A Search For Lithium-Rich Giants Among Stars With Infrared Excesses, Francis C. Fekel, Lyndon C. Watson

Information Systems and Engineering Management Research Publications

The unusual nature of the single, rapidly rotating, lithium-rich K giant HDE 233517, which is currently undergoing significant mass loss, prompted a search for giants with similar properties. High-dispersion spectroscopic observations were obtained of HD 219025, a known lithium-rich infrared-excess giant, plus 39 stars from a list of G and K giants with excess far-infrared emission. The projected rotational velocities of the vast majority of infrared-excess giants appear to be similar to those of normal G and K giants. Six giants have lithium abundances at or above theoretical upper envelope values. The percentage of such stars in the sample of …

Determination Of Chloride Concentration Using Capillary Zone Electrophoresis: An Instrumental Analysis Chemistry Laboratory Experiment, Michael A. Janusa

Faculty Publications

Capillary zone electrophoresis (CZE) has received a great deal of attention as a tool for the separation and detection of low-molecular-mass inorganic ions. CZE is a fast growing analytical technique that uses a low-volume sample accompanied by a high detection efficiency. Since this is a fairly new analytical technique that shows tremendous promise, it should be introduced to students at the undergraduate level. We have developed a CZE experiment that is well suited for an instrumental analysis chemistry laboratory and can be modified for other species or substances.

The Probe, Issue 194 – November 1998

The Probe: Newsletter of the National Animal Damage Control Association

Managing Wolf Predation on Livestock in Idaho Since Reintroduction: Wildlife Services Program Perspective and Summary -- Layne R. Bangerter, District Supervisor, USD A, APHIS, Wildlife Services, Boise, Idaho; George E. Graves, Assistant State Director, USD A, APHIS, Wildlife Services, Boise, Idaho, and NADC A Northern Rocky Mountains Regional Director
California Votes on Trap Ban
Book Review: "Nuisance Animals: Backyard Pests to Free-Roaming Killers" By John Trout, Jr. Midwest Publishing, 1997. 192 pages softcover ($14.95)
Record Attendance at Bird Strike Committee-USA Meeting

Bird-Strike Committee -USA Abstracts
ADVICE TO FLIGHT CREWS CONCERNING THE WILDLIFE HAZARD TO AIRCRAFT -- Paul Eschenf elder, Air …

Completion Report: Arkansas State Plant Board Pesticide Ground Water Monitoring Project - Phase Vi, T. Nichols, P. Vendrell, K. Steele, H. D. Scott, C. Armstrong

Arkansas Water Resources Center Technical Reports

No abstract provided.

Mathematics Found In Poetry, Alexis Mann

Humanistic Mathematics Network Journal

No abstract provided.

Plastic Pebbles, Virginie H. Mitchem

Humanistic Mathematics Network Journal

No abstract provided.

Architecture And Mathematics: An Introduction For Elementary And Middle School Children, Kim Williams

Humanistic Mathematics Network Journal

No abstract provided.

Nine And One Third Circles Of Rejoicing, Michael Capobianco

Humanistic Mathematics Network Journal

No abstract provided.

Manifesto On Mathematical Education, Saunders Mac Lane

Humanistic Mathematics Network Journal

No abstract provided.

From My Dance Is Mathematics: Poems From A Mathematics Teacher, Joanne S. Growney

Humanistic Mathematics Network Journal

No abstract provided.

Opportunities For The Holding/Fattening/Processing And Aquaculture Of Western Rock Lobster (Panulirus Cygnus), Fisheries Western Australia

Fisheries Management Papers

The objective of this discussion paper is to describe policy options for dealing with rock lobster enhancement, grow-out and aquaculture issues. It is designed to serve as a policy framework for dealing with future applications to hold/fatten/process and aquaculture western rock lobster and administer existing practices.

Modelling Direct Episodic Recharge In The Western Australian Wheatbelt, F Lewis, Cooperative Research Centre For Catchment Hydrology (Australia)

Resource management technical reports

In agricultural regions of Western Australia, salinity is spreading. This is because the area taken up by groundwater discharge is increasing as a result of increased groundwater recharge following the replacement of native vegetation systems by annual crops and pasture species. Attempts to reduce groundwater recharge are now being made as it is hoped that this will decrease the rate of land salinisation. At several sites, average recharge rates have been estimated to be from 2% to 13% of the average annu ter hydrographs from the agricultural regions indicate that at some sites recharge does not occur as small amounts …

Geosciences Newsletter- 1998, Department Of Geosciences

Geological and Environmental Sciences News

Vol. 1, No. 23

• Dear Alumni and Friends
• Faculty News
• Department News
• Donations

Environmental Assessment For The Designation Of The Continental Divide National Scenic Trail, United States Department Of The Interior, Bureau Of Land Management

Environmental Assessments (WY)

On October 2, 1968, Congress passed the National Trails System Act. This Act called for the establishment of a system of national scenic trails "which will be extended trails so located as to provide for maximum outdoor recreation potential and for the conservation and enjoyment of the nationally significant scenic, historic, natural, or cultural qualities of the areas through which such trails may pass." As a result of the 1978 amendment to this Act, Congress designated the Continental Divide National Scenic Trail (CDNST) as part of the National Scenic Trail system. The CDNST is a trail route traversing the length …

Dynamics Of Biomolecules: Assignment Of Local Motions By Fluorescence Anisotropy Decay, Carl N. Bialik, Barnabas Wolf, Edward L. Rachofsky, J. B. A. Ross, William Laws

Chemistry and Biochemistry Faculty Publications

Many biological systems have multiple fluorophores that experience multiple depolarizing motions, requiring multiple lifetimes and correlation times to define the fluorescence intensity and anisotropy decays, respectively. To simplify analyses, an assumption often made is that all fluorophores experience all depolarizing motions. However, this assumption usually is invalid, because each lifetime is not necessarily associated with each correlation time. To help establish the correct associations and recover accurate kinetic parameters, a general kinetic scheme that can examine all possible associations is presented. Using synthetic data sets, the ability of the scheme to discriminate among all nine association models possible for two …

Santa Clara Magazine, Volume 40 Number 3, November 1998, Santa Clara University

Santa Clara Magazine

8 - EARTHBOUND IN TUSCANY By Susan Vogel. Cultivating the soil and restoring a Tuscan farmhouse became regenerative physically and spiritually for SCU English professor Edward Kleinschmidt.

14 - PREMIES By Sue Frey. Kathy (Straus) VandenBerg '66 pioneers a rule-defying path, as she puts tenderness and love above tubes and isolation in caring for premature newborns.

18 - SEA HUNT By Connie Hinckley. SCU SCREEM team members probe the blue-black waters of the Arctic Ocean for historic bounty using high-tech robotics.

26 - THE VILLAGE PEOPLE By Kathleen (Nino) Castello '88. Some 40 years ago a community of ex-GIs and …