Astrophysics and Astronomy Commons^™

Combined Experimental And Theoretical Studies On Methane Photolysis At 121.6 Nm And 248 Nm- Implications On A Program Of Laboratory Simulations Of Titan’S Atmosphere, C. Romanzin, E. Arzoumanian, Et. Es-Sebbar, A. Jolly, S. Perrier, M.-C. Gazeau, Y. Bénilan

Dr. Et-touhami Es-sebbar

Methane is, together with N2, the main precursor of Titan’s atmospheric chemistry. In our laboratory, we are currently developing a program of laboratory simulations of Titan’s atmosphere, where methane is intended to be dissociated by multiphotonic photolysis at 248 nm. A preliminary study has shown that multiphotonic absorption of methane at 248 nm is efficient and leads to the production of hydrocarbons such as C2H2 (Romanzin et al., 2008). Yet, at this wavelength, little is known about the branching ratios of the hydrocarbon radicals (CH3, CH2 and CH) and their following photochemistry. This paper thus aims at investigating methane photochemistry …

Temperature-Dependent Photoabsorption Cross-Section Of Cyano-Diacetylene In The Vacuum Uv, N. Fray, Y. Bénilan, M.-C. Gazeau, A. Jolly, M. Schwell, E. Arzoumanian, Et. Es-Sebbar, T. Ferradaz, J.- C. Guillemin

Dr. Et-touhami Es-sebbar

Using synchrotron radiation as a tunable VUV light source, we have measured, for the first time, the absolute photoabsorption cross sections of HC5N with a spectral resolution of 0.05 nm in the region between 80 and 205 nm from 233 to 298 K. The measured cross sections are used to predict the HC5N photodestruction rate in the solar system and to model a transmission spectrum in Titan's atmosphere. Comparing the latter with that acquired by the Ultraviolet Imaging Spectrograph on board the Cassini spacecraft, we have determined an upper limit of 2.7 × 10−5 on the HC5N abundance at 1100 …

Absolute Nitrogen Atom Density Measurements By Two-Photon Laser-Induced Fluorescence Spectroscopy In Atmospheric Pressure Dielectric Barrier Discharges Of Pure Nitrogen, Et-Touhami Es-Sebbar, Christian Sarra-Bournet, Nicolas Naudé, Françoise Massines, Nicolas Gherardi

Dr. Et-touhami Es-sebbar

In this paper, two-photon absorption laser induced fluorescence spectroscopy is used to follow the nitrogen atom density in flowing dielectric barrier discharges fed with pure nitrogen and operating at atmospheric pressure. Two different dielectric barrier discharge regimes are investigated: the Townsend regime, which is homogeneous although operating at atmospheric pressure, and the more common filamentary regime. In both regimes, densities as high as 3x1014 /cm3 are detected. However, the N atoms kinetic formation depends on the discharge regime. The saturation level is reached more rapidly with a filamentary discharge. For a given discharge regime, the N atom density depends strongly …

Contributions To The Development Of The S.E.T.U.P. (Experimental And Theoretical Simulations Useful For Planetology) Project, E. Arzoumanian, C. Romanzin, M-C. Gazeau, Et. Es-Sebbar, A. Jolly, S. Perrier, Y. Benilan

Dr. Et-touhami Es-sebbar

No abstract provided.

Multiwavelength Studies For Titan's Atmospheric Composition Analysis, Y. Benilan, Et. Es-Sebbar, N. Fray, M-C. Gazeau, A. Jolly, M. Schwell, J. Guillemin

Dr. Et-touhami Es-sebbar

Titan's atmosphere mainly made of nitrogen and methane is rich in organic molecules. Hydrocarbons are formed from the photolytic dissociation of CH4 and nitriles are created by dissociation of N2 followed by reactions with hydrocarbons. In order to understand the physicochemical mechanisms responsible for the evolution of Titan's atmosphere, photochemical models are built. The latter need constrains for vertical profiles of organic compounds from the high thermosphere down to the low stratosphere as well as photodissociation rates. Those profiles over the entire atmosphere can be retrieved from Cassini observations, in particular by limb sounding, coupling infrared and ultraviolet spectroscopy. However, …

Vuv Photostability Of Prebiotic Species, M. Schwell, Y. Bénilan, M.-C. Gazeau, N. Fray, A. Jolly, Et. Es-Sebbar, N. Champion, S. Leach, H. W Jochims, H. Baumgärtel, E. Rühl

Dr. Et-touhami Es-sebbar

No abstract provided.

S.E.T.U.P. Experimental And Theoretical Simulations Useful For Planetology- Related Studies In The Frame Of A Program Of Titan’S Atmosphere Laboratory Simulations, M.-C. Gazeau, Et. Es-Sebbar, E. Arzoumanian, C. Romanzin, A. Jolly, S. Perrier, Y. Bénilan

Dr. Et-touhami Es-sebbar

No abstract provided.

Characterization Of An N2 Flowing Microwave Post-Discharge By Oes Spectroscopy And Determination Of Absolute Ground-State Nitrogen Atom Densities By Talif, Et. Es-Sebbar, Y. Benilan, A. Jolly, M-C. Gazeau

Dr. Et-touhami Es-sebbar

A flowing microwave post-discharge source sustained at 2.45 GHz in pure nitrogen has been investigated by optical emission spectroscopy (OES) and two-photon absorption laser-induced fluorescence (TALIF) spectroscopy. Variations of the optical emission along the post-discharge (near, pink and late afterglow) have been studied and the gas temperature has been determined. TALIF spectroscopy has been used in the late afterglow to determine the absolute ground-state nitrogen atomic densities using krypton as a reference gas. Measurements show that the microwave flowing post-discharge is an efficient source of N (4S) atoms in late afterglow. In our experimental conditions, the maximum N (4S) density …

College Of Engineering Senior Design Competition Spring 2009, University Of Nevada, Las Vegas

Fred and Harriet Cox Senior Design Competition Projects

Part of every UNLV engineering student’s academic experience, the senior design project stimulates engineering innovation and entrepreneurship. Each student in their senior year chooses, plans, designs, and prototypes a product in this required element of the curriculum. A capstone to the student’s educational career, the senior design project encourages the student to use everything learned in the engineering program to create a practical, real world solution to an engineering challenge.

The senior design competition helps to focus the senior students in increasing the quality and potential for commercial application for their design projects. Judges from local industry evaluate the projects …

Homogeneous Dbd In N2: 1) Lif, Talif And Electrical Measurements, N. Gherardi, Et. Es-Sebbar, C. Sarra-Bourret, N. Naudé, F. Massines

Dr. Et-touhami Es-sebbar

In this paper we compare two different discharges that can be obtained in a DBD configuration, that is to say the filamentary discharge (usual regime in atmospheric DBD) with the Atmospheric Pressure Townsend Discharge (APTD), which is a homogeneous regime obtained in nitrogen atmosphere. The aim is to help in the understanding of the processes which control the transition from one regime to the other. To do so, the discharge is characterized through electrical measurements, coupled with optical diagnostics among which Laser Induced Fluorescence (LIF) for radical density measurements. The influence of the addition of small quantities of additives on …

Active Species Generation Of Homogeneous Dbd In N2: Experiment And Modelling, N. Gherardi, Et. Es-Sebbar, C. Sarra-Bourret, N. Naudé, F. Massines, D. Tzyganov, P. Ségur, S. Pancheshnyi

Dr. Et-touhami Es-sebbar

No abstract provided.

A Teaching Intervention To Increase Achievement Of Hispanic Nonscience Majors Taking Physical Science Courses, G. Herold Poelzer, Liang Zeng

Physics and Astronomy Faculty Publications and Presentations

This quasi-experimental pilot study of nonscience majors taking a physical science course at a university in South Texas was conducted on Hispanic undergraduate students, and is theory based--an application of attribution theory. That the treatment group outperformed the comparison group provides evidence of the positive effect of having students reflect on controllable reasons for their grades and on their subsequent planning of strategies to maintain or improve those grades. (Contains 1 table and 2 figures.)

Surface Ion-Electron Recombination As The Main Source Of Atoms In Flowing N2 Dbd, D. Tsyganov, Et. Es-Sebbar, S. Pancheshnyi, N. Gherardi, P. Ségur, F. Massines

Dr. Et-touhami Es-sebbar

No abstract provided.

Talif Quantification Of Nitrogen Atoms Applied To Experimental Simulation Of Titan’S Atmosphere, Et. Es-Sebbar, Y. Benilan, E. Arzoumanian, M.-C. Gazeau

Dr. Et-touhami Es-sebbar

No abstract provided.

S.E.T.U.P., A New Program Of Representative Simulations Of Titan’S Atmosphere: Current Status, M-C. Gazeau, E. Arzoumanian, Y. Benilan, Et. Es-Sebbar, A. Jolly, S. Perrier, C. Romanzin

Dr. Et-touhami Es-sebbar

No abstract provided.

Comparison Of Townsend Dielectric Barrier Discharge In N2, N2/O2 And N2/N2o: Behavior And Density Of Radicals, F. Massines, Et. Es-Sebbar, N. Gherardi, N. Naudé, D. Tsyganov, P. Ségur, S. Pancheshnyi

Dr. Et-touhami Es-sebbar

No abstract provided.

Laboratory Experiments As Support To The Built Up Of Titan’S Theoretical Models And Interpretation Of Cassini-Huygens Data, M-C. Gazeau, Y Benilan, Et. Es-Sebbar, T. Ferradaz, E. Hébrard, A. Jolly, F. Raulin, C. Romanzin, J-C. Guillemin, C. Berteloite, A. Canosa, S. D. Le Picard, Ian R. Sims

Dr. Et-touhami Es-sebbar

No abstract provided.

Video-Tutorials For Tech Sign Vocabulary In Astronomy, Judy Egelston-Dodd, Simon Ting

Journal of Science Education for Students with Disabilities

This article describes the mediated American Sing Language (ASL) presentation of technical vocabulary and definitions within the context of a web-based astronomy course for first year students at the National Technical Institute for the Deaf at Rochester Institute of Technology (Rochester, NY). Deaf students showed achievement gains with fewer astronomy misconceptions. Also, student ratings of instructor ASL skill, as reported on the student rating system, were higher after students used the ASL vocabulary videos.

Ua1b1/7 Wku Centennial Mosaic Dedication, Western Kentucky University

WKU Archives Records

Dedication program for the WKU Centennial Mosaic and fountain, includes sky map for Founders Day, November 16, 2006.

The Attitudes Of Educators To Information Technology Adoption In Schools Settings, Manoj Maharaj, Wesley Govender

Manoj Maharaj

No abstract provided.

The University Of Nebraska At Omaha Center For Space Data Use In Teaching And Learning, Neal Grandgenett, Uno Aviation Institute

Faculty Books and Monographs

UNOAI Report 2000-4

Within the context of innovative coursework and other educational activities, we are proposing the establishment of a University of Nebraska at Omaha Center for the Use of Space Data in Teaching and Learning. This Center will provide an exciting and motivating process for educators at all levels to become involved in professional development and training which engages real life applications of mathematics, science, and technology. The Center will facilitate innovative courses (including online and distance education formats), systematic degree programs, classroom research initiatives, new instructional methods and tools, engaging curriculum materials, and various symposiums. It will involve …

The Universe On A Desktop: Observational Astronomy Simulations In The Instructional Laboratory, Laurence A. Marschall

Physics and Astronomy Faculty Publications

Though the value of hands-on learning has long been recognised by educators, it is difficult to design laboratories in astronomy classes that present realistic astrophysical techniques to undergraduate students. Unlike most other sciences, astronomy is largely observational, not experimental, and making useful observations involves expensive equipment over time scales inconvenient for pedagogy. In recent years, however, astronomy has gone almost completely digital, and the advent of large on-line databases and fast personal computers has made it possible to realistically simulate the experience of research astrophysics in the laboratory. Since 1992, Project CLEA (Contemporary Laboratory Experiences in Astronomy) has been developing …

Science On The Great Plains: The History Of Physics And Astronomy At The University Of Nebraska-Lincoln, M. Eugene Rudd

M. Eugene Rudd Publications

The year 1988 marked the 100th anniversary of the founding of the Department of Physics at the University of Nebraska. While the year passed without fanfare in the department, DuaneJaecks, one of the members of the faculty, suggested to the author that it would be a good time to write a history of what is now the Department of Physics and Astronomy. He not only provided the initial impetus for the project, but has also given it his continual help and encouragement. While the initial plan was to write only a brief, informal departmental history, the project, like Topsy, grew. …

Ua11/1 On Campus, Vol. 1, No. 13, Wku University Relations

WKU Archives Records

On Campus newsletter featuring articles about faculty, staff and events at Western Kentucky University. Regular features are:

• College News
• Sponsored Programs
• Hot off the Press
• Personnel File

This issue includes articles:

• Fifth Women's Studies Conference Opens
• Hardin Planetarium Show Features Sun's Children
• President Thomas Meredith Appointed to Constitutional Improvement Policy Council
• WKU to Begin Reaccreditation Process
• Students Raise $48,715 First Week of Alumni Fund Student Phonathon
• Phillips, Hugh. Russia's Coup; A Historical Perspective
• Esion, Sheila. Jim Wayne Miller's Writing Takes New Shape
• Threads of Compassion: Fabric Art Exhibit by Penny Sisto Opens Tomorrow
• Shuttle May Have Foiled, but Summer Eclipse …

Explorations, Vol. 3, No. 2, Maryann Jerkofsky, David H. Clark, David Ebitz, Alan Davenport, David C. Smith, Erodgan Kiran

Explorations — A Journal of Research

Cover: Edmund G. Schildknecht, Seated Figure, 1929, oil on canvas, 30” x 25”, acc. no. 85.6.31, bequest of Edmund G. Schildknecht

Articles include:
"Reyes Syndrome Under Attack at UMaine," by MaryAnn Jerkofsky

"Maine Service Abroad: Using Labor Market Results for Planning Education and Training in Developing Countries," by David H. Clark

"Feeling and Form: Four American Paintings in the University of Maine Art Collection," by David Ebitz

"We Stand Corrected," Volume 3, Number 1, of EXPLORATIONS

"Confessions of a Comet Huckster," by Alan Davenport

"H.G. Wells: Socialist, Feminist, Polymath, Educator and Hero," by David C. Smith

"Supercritical Fluids and …

Recipe For A Moon, Edwin J. Geels

Pro Rege

No abstract provided.

Christian Astronomy Vs. Secular Astronomy, Richard G. Hodgson

Pro Rege

No abstract provided.

Ua77/1 Western Alumnus, Vol. 43, No. 4, Wku Alumni Association

WKU Archives Records

WKU alumni magazine. Features the following articles:

• Conway, Sheila. Competency Based Teacher Education
• Scarborough, John. Enthusiasm & Planning, Powerful One-Two Punch for Education
• Burkeen, Emmett. Counselor Education, A Study in Development
• Stuart, Robert. The Stage is His Classroom - Bill Leonard
• Just, Paul. Remember When, 1955-56
• Conway, Sheila. Women's Athletics Return
• Armstrong, Don. Biology for Real - Tech Aqua Biological Station
• Goldwater, Barry. On the Energy Crisis
• Porter, William. Third World Realities
• Muskie, Edmund. Restoring Our Confidence
• Dickey, Debbie. The Big Red Western Band
• Given, Ed. Instant Alumni
• Topper Power Carries WKU to National Finals - Football
• Jimmy Feix, Coach …

Ua12/2/1 College Heights Herald, Vol. 53, No. 27, Wku Student Affairs

WKU Archives Records

WKU campus newspaper reporting campus, athletic and Bowling Green, Kentucky news. Articles in this issue:

• Johnston, Scott. English department Reevaluates CLEP
• Caudill, Tom. New Course Offerings Decrease This Semester
• Sen. Edmund Muskie to Speak Tuesday
• Strehl, Mary & Harry Sarles. Far out … WKU Astronomers Are Monitoring Comet for Radio Waves - Kohoutek
• Rice Bowl Bus to Leave at 8p.m
• Scholarships to Be Awarded to ROTC Students
• Research Conference Set – Sigma Xi Society
• Show Recreates Nativity Sky – Hardin Planetarium
• Energy Crisis Hits Others More Severely Than Western
• Skidoo! 15^th Street Hill Bears Watching
• Brizendine, Clint. Free Market …

Ua11/2 Planetarium Program To Describe The Moon In February Sessions, Wku Public Affairs

WKU Archives Records

Press release entitled: Planetarium Program to Describe the Moon in February Sessions.