Digital Commons Network^™

Development Of A Generalized Theoretical Model For The Response Of A Phase/Doppler Measurement System To Arbitrarily Oriented Fibers Illuminated By Gaussian Beams, Scott A. Schaub, James A. Lock, Amir A. Naqwi

Physics Faculty Publications

We present a generalized theoretical model for the response of the phase/Doppler (P/D) measurement system to light scattered by cylindrical fibers. This theoretical model is valid for arbitrary fiber diameters and refractive indices, for Gaussian incident beams, and it accounts for arbitrary fiber orientations, fiber positions, and effects that are due to the two-dimensional receivers. The generalized P/D computer model (GPDCM) is the extension of an earlier study by the authors, combining past P/D simulation methodology with recent developments in modeling light scattering by tilted cylindrical fibers. A FORTRAN computer program that implements the GPDCM theoretical development was written and …

Soluble Species In Aerosol And Snow And Their Relationship At Glacier 1, Tien Shan, China, Junying Sun, Dahe Qin, Paul A. Mayewski, Jack E. Dibb, Sallie I. Whitlow, Zhongqin Lee, Qinzhao Yang

Earth Sciences

Simultaneous sampling of aerosol (n = 20) and snow (n = 114) was made at Glacier 1, Tien Shan, between May 19 and June 29, 1996. Similar temporal patterns of some major ion (calcium, magnesium, potassium, sodium, chloride, and sulfate) concentrations between snow and aerosol show that snow chemistry basically reflects changes in the chemistry of the atmosphere. This gives us confidence in the reconstruction of past atmospheric change using some snow data. There are no significant correlations between aerosol and snow samples for ammonium and nitrate. This suggests that post-depositional and/or post-collection processes may alter ammonium and nitrate concentrations …

Near–Infrared Classification Spectroscopy: H–Band Spectra Of Fundamental Mk Standards, Michael R. Meyer, Suzan Edwards, Kenneth H. Hinkle, Stephen E. Strom

Astronomy: Faculty Publications

We present a catalog of H-band spectra for 85 stars of approximately solar abundance observed at a resolving power of 3000 with the KPNO Mayall 4 m Fourier Transform Spectrometer. The atlas covers spectral types O7M5 and luminosity classes IV as defined in the MK system. We identify both atomic and molecular indices and line ratios that are temperature and luminosity sensitive, allowing spectral classification to be carried out in the H-band. The line ratios permit spectral classification in the presence of continuum excess emission, which is commonly found in premain-sequence or evolved stars. We demonstrate that with …

Analytical Solution Of The Generalized Discrete Poisson Equation, G. Y. Hu, Jai Yon Ryu, R. F. O'Connell

Faculty Publications

We present an analytical solution to the generalized discrete Poisson equation, a matrix equation which has a tridiagonal matrix with fringes having an arbitrary value for the diagonal elements. The results are of relevance to a variety of physical problems, which require the numerical solution of the Poisson equation. As examples, the formula has been applied to the solution of the electrostatic problem of tunnelling junction arrays with two and three rows.

Volume 36, Number 13: November 20, 1998, University Of North Dakota

University Letter Archive

No abstract provided.

Crusader, November, 20, 1998, College Of The Holy Cross

Student Newspapers

The student newspaper for the College of the Holy Cross in Worcester, Massachusetts. Articles include coverage of campus events and issues, sports, editorials and special features.

November 20, 1998, The Daily Mississippian

Daily Mississippian (all digitized issues)

No abstract provided.

Laser-Plasma Harmonics With High-Contrast Pulses And Designed Prepulses, R.S. Marjoribanks, L. Zhao, F.W. Budnik, G. Kulcsar, A. Vitcu, H. Higaki, R. Wagner, Anatoly Maksimchuk, Donald P. Umstadter, S.P. Le Blanc, M.C. Downer

Donald Umstadter Publications

One aspect of the complexity of mid- and high-harmonic generation in highintensity laser-plasma interactions is that nonlinear hydrodynamics is virtually always folded together with the nonlinear optical conversion process. We have partly dissected this issue in picosecond and subpicosecond interactions with preformed plasma gradients, imaging and spectrally resolving low- and mid-order harmonics. We describe spatial breakup of the picosecond beam in preformed plasmas, concomitant broaden~ng and breakup of the harmonic spectrum. presumably through self-phase modulation, together with data on the sensitivity of harmonics production efficiency to the gradient or extent of prefomed plasma. Lastly. we show preliminary data of regular …

Meeting Minutes, Wku University Senate

Faculty Senate

Meeting regarding post tenure review, summer stipends, salaries, fundraising, elections, budget, athletics and tuition waivers.

Spartan Daily, November 19, 1998, San Jose State University, School Of Journalism And Mass Communications

Spartan Daily (School of Journalism and Mass Communications)

Volume 111, Issue 58

Eastern Progress - 19 Nov 1998, Eastern Kentucky University

Eastern Progress 1998-1999

No abstract provided.

Volume Cxvi, Number 9, November 19, 1998, Lawrence University

The Lawrentian

No abstract provided.

Washington University Record, November 19, 1998

Washington University Record

No abstract provided.

Sputter Deposition Of High Resistivity Boron Carbide, Ahmad A. Ahmad, Natale J. Ianno, Seong-Don Hwang, Peter A. Dowben

Peter Dowben Publications

We have succeeded in the rf magnetron sputter deposition of high resistivity boron carbide (B1−xCx). This has been accomplished by the sputter depositing the boron carbide from a methane saturated boron carbide target. We show that the composition and optical band gap of the sputter deposited material are functions of the applied rf power. Furthermore, boron carbide/silicon heterojunction diodes fabricated via sputtering compare favorably with those fabricated from borane cage molecule sources using plasma enhanced chemical vapor deposition (PECVD).

Campus Chronicle (Vol. 1, No. 12), Valparaiso University

Campus Chronicle

No abstract provided.

Arbiter, November 18, Students Of Boise State University

Student Newspapers

No abstract provided.

The Chanticleer, 1998-11-18, Coastal Carolina University

The Chanticleer Student Newspaper

The editorially independent student produced weekly newspaper of Coastal Carolina University.

The Winonan, Winona State University

The Winonan - 1990s

No abstract provided.

The Guardian, November 18, 1998, Wright State University Student Body

The Guardian Student Newspaper

Twenty-four page issue of The Guardian, the official student-run newspaper for Wright State University. The Guardian has been published regularly since March of 1965.

Spartan Daily, November 17, 1998, San Jose State University, School Of Journalism And Mass Communications

Spartan Daily (School of Journalism and Mass Communications)

Volume 111, Issue 56

Ua12/2/1 College Heights Herald, Vol. 74, No. 23, Wku Student Affairs

WKU Administration Documents

WKU campus newspaper reporting campus, athletic and Bowling Green, Kentucky news. This issue contains articles:

• Fire Guts Kappa Alpha House
• Goetz, Kristina. Liver Recipient Relishing Chance at Life – Jim Marcotte
• Sutton, Lyndsay. Graduation Delay Equals Financial Turmoil
• Normal Crosswalk Bad Idea
• Tabor, Chris. Editorial Cartoon re: Normal Crosswalk
• Wilkins, David. Student Government Association Self-Serving, Ignoring Debate
• E., Justin. Editorial Cartoon re: World Wrestling Federation Political Candidates
• Back, Shannon. Taking Out the Garbage – Recycling
• Goddard, Holly. Anne Lewis Explores Appalachian Life
• Goddard, Holly. Lengthy Debates Blamed for Student Government Association Dropouts
• Lucas, Fred. Stacey Coy Remembered Through Scholarship
• Parking …

Myrin Library News, Vol. 12 No. 2, November 1998, Myrin Library Staff

Library Newsletters

This newsletter announces recent acquisitions of Myrin Library at Ursinus College and provides information and updates about recent projects, exhibits and events.

Method Of Time-Resolving Fourier-Transform Spectroscopy To Allow Interferogram Sampling At Unevenly Spaced Path Length Differences, Robert Peale, Henry Weidner

UCF Patents

A low cost method of adding time-resolving capability to commercial Fourier-transform spectrometers with a continuously scanning Michelson interferometer. This invention is specifically designed to eliminate noise and artifacts caused by mirror-speed variations in the interferometer. The method exists as two parts: 1) a novel timing scheme for synchronizing the transient events under study with the digitizing by an analog-to-digital converter, and 2) a mathematical algorithm for extracting the spectral information from the recorded data. The novel timing scheme is a modification of the well known interleaved, or stroboscopic, method. It achieves the same timing accuracy, signal-to-noise ratio, and freedom from …

Executive Committee - Agenda, 11/17/1998, Academic Senate

Academic Senate Agendas

No abstract provided.

Grand Valley Forum, Volume 023, Number 16, November 16, 1998, Grand Valley State University

1998-1999, Volume 23

Grand Valley Forum is Grand Valley State's faculty and staff newsletter, published from 1976 to the present.

Spartan Daily, November 16, 1998, San Jose State University, School Of Journalism And Mass Communications

Spartan Daily (School of Journalism and Mass Communications)

Volume 111, Issue 55

11/16/1998 - Eiu Faculty Recognized For Achievements.Pdf, University Marketing And Communications

1998

No abstract provided.

November 16, 1998, James Madison University

The Breeze, 1990-1999

The Breeze is the student newspaper of James Madison University in Harrisonburg, Virginia.

Fortnightly - November 16, 1998

Fortnightly

No abstract provided.

Ultralow-Energy Electrons From Fast Heavy-Ion Helium Collisions: The “Target Cusp“, W. Schmitt, R. Moshammer, F. S.C. O'Rourke, H. Kollmus, L. Sarkadi, R. Mann, S. Hagmann, Ronald E. Olson, J. Ullrich

Physics Faculty Research & Creative Works

Doubly differential cross sections d2σ / dν ‖ dν⊥ have been obtained by mapping the 3-dimensional velocity space of ultralow- and low-energy electrons \ (1.5 meV < = Ee < = 100 eV \) emitted in singly ionizing 3.6 MeV / u Au53+ on helium collisions. A sharp \ ( ΔEFWHMe⊥< = 22 meV \) asymmetric peak centered at = 0 is observed to emerge at ultralow energies from the strongly forward shifted low-energy electron velocity distribution. The shape of this "target cusp," which is very sensitive on the details of the two-center potential, is in excellent accord with theoretical predictions. © 1998 The American Physical Society.