Digital Commons Network^™

Photodetachment Of He- In The Vicinity Of The He* (N=3, 4, And 5) Thresholds, Chien-Nan Liu, Anthony F. Starace

Anthony F. Starace Publications

A comprehensive eigenchannel R-matrix study of photodetachment of He-(1 s2s2p ⁴P⁰ (1 ) is presented for the energy region of the Hesnl³l) thresholds, where 3<~n<~5. Over this energy region we present all partial cross sections which have been measured experimentally, including theoretical predictions (1 for the Hes3p ³P ( ) partial cross section, as well as energies and widths for all resonances, and identifications of all major ones. Near the Hen=3) thresholds, we predict two ⁴D^e resonances that to our knowledge have previously been neither predicted nor observed, and present results showing their effects on partial cross sections and photoelectron angular distributions; …

Rental Harmony: Sperner's Lemma In Fair Division, Francis E. Su

All HMC Faculty Publications and Research

No abstract provided in this article.

Anneli Lax: In Memoriam, Elena Anne Corie Marchisotto

Humanistic Mathematics Network Journal

No abstract provided.

Teaching A Humanities Course: A Mathematician’S View, Bill Marion

Humanistic Mathematics Network Journal

No abstract provided.

What Is The Thing Called “Humanistic Mathematics?”, Tamar Apel

Humanistic Mathematics Network Journal

No abstract provided.

Mathematics Is An Art: The Story Of A One-Time Course, Paul Fjelstad

Humanistic Mathematics Network Journal

No abstract provided.

A Reflection On The Word: Remembering The Word “Word” Is Reflexive, Paul Fjelstad, Ivan Ginchev

Humanistic Mathematics Network Journal

No abstract provided.

Book Review: A Tour Of The Calculus By David Berlinski, Bernard Fleishman

Humanistic Mathematics Network Journal

No abstract provided.

Book Review: Mathematical Reflections By Peter Hilton, Derek Holton And Jean Pedersen, Ladnor Geissinger

Humanistic Mathematics Network Journal

No abstract provided.

Tea Tasting And Pascal Triangles, Paul Alper, Yongzhi Yang

Humanistic Mathematics Network Journal

No abstract provided.

Back Matter, Issue 21, 1999

Humanistic Mathematics Network Journal

No abstract provided.

Measurement Of TC Suppression In Tungsten Using Magnetic Impurities, Betty A. Young, T. Saab, Blas Cabrera, J. J. Cross, R. M. Clarke, R. A. Abusaidi

Physics

We have measured the effects of dilute magnetic-atom doping on the superconducting transition temperature of tungsten thin films. Our “T_c tuning” technique is accurate, precise, and simple. Experiments were performed using dc-magnetron-sputtered tungsten films with undoped values of T_c in the range of 70–150 mK. The magnetic-atom doping was achieved using ion implantation. Specific T_c suppressions of between 5% and 65% were targeted and observed in this study. The transition width of each undoped sample was ≈1 mK and the transition widths remained sharp after implantation with ⁵⁶Fe⁺ ions. Our data are in good agreement …

Investigating Ground And Surface Water In The Republican River Basin Of Nebraska Using Water Chemistry And Environmental Isotopes, Jennifer J. Schellpeper

School of Natural Resources: Dissertations, Theses, and Student Research

Recent legal battles concerning water use initiated an investigation of the stream/aquifer relationships in the Republican River Basin located in southwest Nebraska. Ground and surface water was analyzed for tritium, deuterium, ¹⁸O, and major ions. Temperature, pH, conductivity and alkalinity were determined on-site. Samples were collected during 1997 and 1998 from irrigation wells throughout the entire basin. Localized interactions between groundwater and surface water were examined during twenty-four hour pump tests performed on the irrigation wells screened in the alluvium along the river valley and its tributaries. These data show there are differences between the ground and surface waters …

Enantioseparation Of Alkylaryl Sulfoxides Using Capillary Zone Electrophoresis, Chad Snyder

Masters Theses & Specialist Projects

Alkylaryl sulfoxides possess a chiral sulfur atom easily identifiable by capillary zone electrophoresis (CZE). Separation of chiral alkylaryl sulfoxides has already been accomplished by modified method of CZE known as micellar electrokinetic chromatography (MEKC). However, no articles have been published on the enantioseparation of alkylaryl sulfoxides using capillary zone electrophoresis.

A series of sulfoxides were synthesized, purified and identified via NMR. Enantioseparation was performed using CZE employing a 10 mmol. Phosphate buffer (pH 4.0, 25% acetonitrile, 2% sulfated-β-cyclodextrin). Synthesis of these sulfoxides will be presented along with the results of the procedure’s optimization. Separation of the sulfoxide enanitomers relies on …

A Study Of The Thermal Properties Of Peti-5/Im7, Yan Tang

Masters Theses & Specialist Projects

PETI-5 (Phenylethynyl-terminated polyimide) is a substance that shows a great deal of potential in the high-speed aircraft and the aerospace industry. PETI-5 has been used for the High Speed Civil Transport (HSCT), a supersonic passenger aircraft in development at NASA. In this project, four staging samples, one fresh sample, one fully cured sample and one partially cured sample were analyzed and compared using thermal analytical techniques. The sample staged at 450°F with full vacuum showed the highest thermal properties among four staging samples. The results indicated that vacuum is helpful in improving the thermal stability of PETI-5. The mechanism of …

Ecology Of Elk In Northwestern Nebraska: Demographics, Effects Of Human Disturbance, And Characteristics Of Calving Habitat, Bruce A. Stillings

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.

Self-Consistency Algorithms, Thaddeus Tarpey

Mathematics and Statistics Faculty Publications

The k-means algorithm and the principal curve algorithm are special cases of a self-consistency algorithm. A general self-consistency algorithm is described and results are provided describing the behavior of the algorithm for theoretical distributions, in particular elliptical distributions. The results are used to contrast the behavior of the algorithms when applied to a theoretical model and when applied to finite datasets from the model. The algorithm is also used to determine principal loops for the bivariate normal distribution.

La Gestion De La Faune Aux Aeroports, Edward C. Cleary , Richard A. Dolbeer

Other Bird Strike and Aviation Materials

L’homme a toujours ete intrigue et inspire par la beaute des oiseaux et leur capacite de voler. Mais si les oiseaux ont colonise le ciel il y a quelque 150 millions d’annees, nous ne partageons leur espace aerien que depuis cent ans. Helas, ce partage forcement simultane est source de collisions. Certes, les oiseaux ne sont pas les seuls problemes des pilotes.

Experiments To Assess The Cost-Benefits Of Test-Suite Reduction, Gregg Rothermel, Mary Jean Harrold, Jeffery Von Ronne, Christie Hang, Jeffery Ostrin

School of Computing: Technical Reports

Test-suite reduction techniques attempt to reduce the cost of saving and reusing test cases during software maintenance by eliminating redundant test cases from test suites. A potential drawback of these techniques is that in reducing a test suite they might reduce the ability of that test suite to reveal faults in the software. Previous studies suggested that test-suite reduction techniques can reduce test suite size without significantly reducing the fault-detection capabilities of test suites. To further investigate this issue we performed experiments in which we examined the costs and benefits of reducing test suites of various sizes for several programs …

Encounters With Information Text: Perceptions And Insights From Four Gifted Readers, Dorothy Leal, Barbara Moss

Reading Horizons: A Journal of Literacy and Language Arts

This study examines the nature of engagement with informational text by exploring four gifted students' responses to children's information books and informational storybooks. The researchers interviewed the students and students recorded their responses to books in journals over the course of the study. Results indicated that these children expressed a variety of reasons for reading nonfiction and held interesting perceptions and strong opinions about informational content, which varied according to text type. Children identified authors' purposes and genre differences, and expressed preference for books with depth of coverage along with a creative format.

A New Story Of Learning And Schooling, Stephanie Pace Marshall

Publications & Research

In order to create a compassionate and sustainable world, a new global consciousness must become manifest, and this can only come from a paradigm of generative--not prescriptive--learning. It is this paradigm that grounds the design of a new story of teaching and learning.

Aerospace Applications Of Soft Computing And Interval Computations (With An Emphasis On Multi-Spectral Satellite Imaging), Scott A. Starks, Vladik Kreinovich

Departmental Technical Reports (CS)

This paper presents a brief overview of our research in applications of soft computing and interval computations to aerospace problems, with a special emphasis on multi-spectralsatellite imaging.

Black-Tailed Deer Habitat Changes In A Portion Of The Mount St. Helens Blast Zone, Ronald W. Davis

All-Inclusive List of Electronic Theses and Dissertations

This study utilized Landsat TM imagery to evaluate black-tailed deer habitat changes in a portion of the Mount Saint Helens blast zone in western Washington. The purpose of this study was to compare the post eruption vegetation changes with population trends for black tailed deer. The 55,000-acre study area comprises a Washington Department of Game Management unit (GMU 524) located to the northnorthwest of Mount St. Helens. Approximately 80% ofthe mostly forested study area was affected by lateral blast from the 1980 eruption. The area is predominantly private land managed for timber production but a small portion falls within the …

Salinity History Of Coastal Marshes Reconstructed From Diatom Remains, Michael L. Parsons, Quay Dortch, R. Eugene Turner, Nancy N. Rabalais

Faculty Publications

Sediment cores were collected from three Louisiana coastal marsh ponds, dated with radioisotopes, and analyzed for diatom remains to determine if long-term salinity changes were evident in the sediment record. A diatom-based salinity index formulated from a statistical comparison of available salinity data and changing diatom assemblages demonstrated that diatom remains appear to preserve salinity signals in coastal brackish and salt marsh environments. The salinity index was applied to sediment cores spanning the late 1600s to the 1990s and provided a more complete record of salinity than field data, which were temporally and spatially incomplete. The salinity reconstructions indicated that …

Vol. 22 No. 3-4 (1999): Pacific Studies Full Issue, The Jonathan Nāpela Center For Hawaiian And Pacific Islands Studies

Pacific Studies

Pacific Studies is published two times a year by The Jonathan Nāpela Center for Hawaiian and Pacific Studies, Brigham Young University Hawai‘i #1979, 55–220 Kulanui Street, Lāʻie, Hawai‘i 96762, but responsibility for opinions expressed in the articles rests with the authors alone. Subscription rate is US$40.00 yearly, payable to The Jonathan Nāpela Center for Hawaiian and Pacific Studies. The Jonathan Nāpela Center for Hawaiian and Pacific Studies (formerly The Pacific Institute) is an organization funded by Brigham Young University Hawai‘i. The Center assists the University in meeting its cultural and educational goals by undertaking a program of teaching, research, and …

Faculty & Staff News - December 1999-January 2000, Prairie View A&M University

Faculty & Staff News

No abstract provided.

Notes From The Director, The Mcnair Team

McNair Scholars Research Journal

No abstract provided.

Acknowledgements, The Mcnair Team

McNair Scholars Research Journal

No abstract provided.

Full Issue, The Mcnair Team

McNair Scholars Research Journal

No abstract provided.

Um Professors Multiply Outreach As Writers Of Mathematics Textbooks, Elaine Pugh

University of Mississippi News

... Houghton Mifflin publishers market series nationwide