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2009

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Articles 31 - 60 of 7616

Full-Text Articles in Physical Sciences and Mathematics

Perbandingan Model Arima Dan Model Regresi Dengan Residual Arima Dalam Menerangkan Perilaku Pelanggan Listrik Di Kota Palopo, Alia Lestari Dec 2009

Perbandingan Model Arima Dan Model Regresi Dengan Residual Arima Dalam Menerangkan Perilaku Pelanggan Listrik Di Kota Palopo, Alia Lestari

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Persediaan sumber daya energi di bumi ini semakin hari semakin menipis. Upaya penghematan energi merupakan salah satu usaha yang perlu dilakukan, termasuk melakukan penghematan penggunaan listrik. Oleh karena itu diperlukan suatu metode yang tepat untuk mengkaji perilaku pelanggan listrik. Dalam makalah ini akan dibandingkan model Autoregressive Integrated Moving Average (ARIMA) dan model Regresi dengan residual ARIMA dalam menerangkan perilaku pelanggan listrik di Kota Palopo. Hasil analisis menunjukkan bahwa model ARIMA lebih baik dari model Regresi dengan residual ARIMA.
Kata kunci : ARIMA, Regresi, Pelanggan Listrik

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Analisis Regresi Logistik Ordinal Untuk Mengetahui Faktor-Faktor Yang Mempengaruhi Status Gizi Balita Nelayan Kecamatan Bulak Surabaya, Destri Susilaningrum, Citra Elok Megahardiyani Dec 2009

Analisis Regresi Logistik Ordinal Untuk Mengetahui Faktor-Faktor Yang Mempengaruhi Status Gizi Balita Nelayan Kecamatan Bulak Surabaya, Destri Susilaningrum, Citra Elok Megahardiyani

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Keadaan gizi balita di Indonesia belum seluruhnya memenuhi kriteria baik, salah satunya adalah di kecamatan Bulak Surabaya. Standart penilaian status gizi di Indonesia menggunakan aturan WHO-NCHS, melalui nilai Zscore yang merupakan salah satu indikator antropometeri yaitu pengukuran berat badan berdasarkan umur (BB/U). Penelitian ini bertujuan untuk mengetahui karakteristik ibu dan balita nelayan serta menentukan faktor-faktor yang mempengaruhi status gizi balita nelayan di Kecamatan Bulak Surabaya. Metode yang digunakan adalah statistik deskriptif dan analisis regresi logistik ordinal. Hasil analisis yang dilakukan menunjukkan bahwa karakterstik ibu balita nelayan di kecamatan Bulak Surabaya 66% berpendidikan tidak tamat SMP, 67% usia ibu menikah ‰¤ …

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Pemodelan Regresi Zero Inflated Poisson (Aplikasi Pada Data Pekerja Seks Komersial Di Klinik Reproduksi Putat Jaya Surabaya), Alia Lestari, Purhadi Purhadi, Madu Ratna Dec 2009

Pemodelan Regresi Zero Inflated Poisson (Aplikasi Pada Data Pekerja Seks Komersial Di Klinik Reproduksi Putat Jaya Surabaya), Alia Lestari, Purhadi Purhadi, Madu Ratna

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Dalam menganalisis hubungan antara beberapa variabel, terdapat sejumlah fenomena dimana variabel responsnya berbentuk biner ataupun berbentuk diskrit. Fenomena dimana variabel responsnya berbentuk diskrit tapi tidak biner, biasanya dianalisis dengan Regresi Poisson. Namun demikian dalam kasus tertentu sering dihadapi suatu peristiwa yang sangat jarang terjadi atau responsnya mempunyai data nol yang sangat banyak, sehingga analisis dengan pendekatan distribusi Poisson seringkali tidak lagi memberikan kesimpulan yang tepat.
Pada penelitian ini akan dikaji suatu metode untuk mengatasi banyaknya respons bernilai nol yang telah dikembangkan oleh Lambert (1992) yaitu Regresi Zero-Inflated Poisson (ZIP). Estimasi parameter model ini menggunakan Algoritma EM dan pengujian hipotesisnya menggunakan …

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Suatu Kajian Analitis Pada Sistem Persamaan Air Dangkal, Sudi Mungkasi Dec 2009

Suatu Kajian Analitis Pada Sistem Persamaan Air Dangkal, Sudi Mungkasi

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Makalah ini mengkaji sistem persamaan air dangkal secara analitis. Dua bentuk sistem persamaan air dangkal dibuktikan ekuivalen. Sifat hiperbolik, karakteristik, gelombang sederhana, pertidaksamaan entropi, dan gelombang shock dipaparkan.

Kata kunci : persamaan air dangkal, sistem hiperbolik, gelombang sederhana,pertidaksamaan entropi, gelombang shock

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Partial Least Squares (Pls) Generalized Linear Dalam Regresi Logistik, Retno Subekti Dec 2009

Partial Least Squares (Pls) Generalized Linear Dalam Regresi Logistik, Retno Subekti

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Kasus multikolinieritas seringkali dijumpai dalam regresi yang mengakibatkan salah interpretasi model regresi yang terbentuk. Seperti halnya dalam regresi linear, dalam regresi logistik kasus multikolinearitas juga dapat menjadi masalah, karena adanya korelasi yang cukup tinggi antara variabel prediktornya. Sehingga untuk mengatasi masalah seperti ini, akan digambarkan aplikasi prosedur partial least squares terhadap suatu kasus regresi logistik khususnya dalam contoh kasus makalah ini adalah regresi logistik ordinal.

Kata kunci : Partial Least Square generalized linier , multikolinieritas, regresi logistik

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Syarat Fritz John Pada Masalah Optimasi Berkendala Ketaksamaan, Caturiyati Caturiyati Dec 2009

Syarat Fritz John Pada Masalah Optimasi Berkendala Ketaksamaan, Caturiyati Caturiyati

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Syarat-syarat optimasi masalah optimasi berkendala merupakan perluasan syarat-syarat optimasi masalah optimasi tak berkendala. Pada paper ini diuraikan syarat Fritz John yang merupakan perluasan syarat optimasi masalah optimasi tak berkendala untuk menyelesaikan masalah optimasi berkendala.

Kata kunci : syarat Fritz John, masalah optimasi berkendala, masalah optimasi tak berkendala

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Partial Wave Analysis Of The Reaction Γp→Pω And The Search For Nucleon Resonances, M. Williams, Gerard P. Gilfoyle, Et. Al. Dec 2009

Partial Wave Analysis Of The Reaction Γp→Pω And The Search For Nucleon Resonances, M. Williams, Gerard P. Gilfoyle, Et. Al.

Physics Faculty Publications

An event-based partial wave analysis (PWA) of the reaction γp → pω has been performed on a high-statistics dataset obtained using the CLAS at Jefferson Lab for center-of-mass energies from threshold up to 2.4 GeV. This analysis benefits from access to the world’s first high-precision spin-density matrix element measurements, available to the event-based PWA through the decay distribution of ω → π +π −π0. The data confirm the dominance of the t-channel π0 exchange amplitude in the forward direction. The dominant resonance contributions are consistent with the previously identified states F15(1680) and …

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Differential Cross Sections And Spin Density Matrix Elements For The Reaction Γp→Pω, M. Williams, Gerard P. Gilfoyle, Et. Al. Dec 2009

Differential Cross Sections And Spin Density Matrix Elements For The Reaction Γp→Pω, M. Williams, Gerard P. Gilfoyle, Et. Al.

Physics Faculty Publications

High-statistics differential cross sections and spin-density matrix elements for the reaction γp → pω have been measured using the CEBAF large acceptance spectrometer (CLAS) at Jefferson Lab for center-of-mass (c.m.) energies from threshold up to 2.84 GeV. Results are reported in 112 10-MeV wide c.m. energy bins, each subdivided into cos θωc.m. bins of width 0.1. These are the most precise and extensive ω photoproduction measurements to date. A number of prominent structures are clearly present in the data. Many of these have not previously been observed due to limited statistics in earlier measurements.

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Equalization Of Loudspeakers And Enclosed Sound Fields, Xi Chen Dec 2009

Equalization Of Loudspeakers And Enclosed Sound Fields, Xi Chen

Theses and Dissertations

Equalization of loudspeakers and enclosed sound fields has been a topic of considerable interest for decades. Confusion has often arisen among audio professionals regarding the feasibility of simultaneously equalizing a loudspeaker and the enclosed field (i.e., the “room”) it excites. Because of frustrations encountered in such efforts, some have advocated abandoning simultaneous equalization altogether. This dissertation discusses the drawbacks of this approach as well as traditional in situ equalization methods. It demonstrates that many problems with traditional equalization stem from the use of measured acoustic pressure at a discrete point in a sound field as the system output. The dissertation …

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Highly Nitrated Cyclopropanes As New High Energy Materials: Dft Calculations On The Properties Of C3H6−N(No2)N (N=3–6), Aloysus K. Lawong, David W. Ball Dec 2009

Highly Nitrated Cyclopropanes As New High Energy Materials: Dft Calculations On The Properties Of C3H6−N(No2)N (N=3–6), Aloysus K. Lawong, David W. Ball

Chemistry Faculty Publications

As part of a continuing study of new potential high energy materials, here we present results of calculations on cyclopropane molecules with three or more nitro groups. DFT calculations suggest that all molecules can exist as minimum-energy stationary states. Energy calculations indicate that some nitrocyclopropanes have a specific enthalpy of decomposition in excess of 8kJg−1, suggesting that they be explored as new potential high energy materials.

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A High-Yield Synthesis Of Chalcopyrite Cuins2 Nanoparticles With Exceptional Size Control, Aaron Thurber, Alex Punnoose Dec 2009

A High-Yield Synthesis Of Chalcopyrite Cuins2 Nanoparticles With Exceptional Size Control, Aaron Thurber, Alex Punnoose

Physics Faculty Publications and Presentations

We report high-yield and efficient size-controlled syntheses of Chalcopyrite CuInS2 nanoparticles by decomposing molecular single source precursors (SSPs) via microwave irradiation in the presence of 1,2-ethanedithiol at reaction temperatures as low as 100◦C and times as short as 30 minutes. The nanoparticles sizes were 1.8nm to 10.8 nm as reaction temperatures were varied from 100◦C to 200◦C with the bandgaps from 2.71 eV to 1.28 eV with good size control and high yields (64%–95%). The resulting nanoparticles were analyzed by XRD, UV-Vis, ICP-OES, XPS, SEM, EDS, and HRTEM. Titration studies by 1H NMR using SSP 1 with 1,2-ethanedithiol …

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Indirect Gravimetric Determination Of Waters Of Hydration, Marina C. Koether Dec 2009

Indirect Gravimetric Determination Of Waters Of Hydration, Marina C. Koether

Faculty Articles

An alternate gravimetric experiment is described that can be employed in the general chemistry or the quantitative analysis laboratory course. The procedure takes less time than conventional methods and introduces students to waters of hydration and indirect determinations.

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Optical Control Of Thermocapillary Effects In Complex Nanofluids, Yuval Lamhot, Assaf Barak, Carmel Rotschild, Mordechai Segev, Meirav Saraf, Efrat Lifshitz, Abraham Marmur, Ramy El-Ganainy, Demetrios N. Christodoulides Dec 2009

Optical Control Of Thermocapillary Effects In Complex Nanofluids, Yuval Lamhot, Assaf Barak, Carmel Rotschild, Mordechai Segev, Meirav Saraf, Efrat Lifshitz, Abraham Marmur, Ramy El-Ganainy, Demetrios N. Christodoulides

Ramy El-Ganainy

We study the strong coupling of light and nanoparticle suspensions and their surface tension effect in capillaries. We show experimentally and theoretically that increasing the intensity of a narrow laser beam passing through a capillary far away from the surface results in a significant decrease in the fluid level. The underlying mechanism relies on light-induced redistribution of nanoparticles in the bulk and the surface of the fluid, facilitating continuous optical control over the surface position. The experiments manifest optical control from afar over properties of fluid surfaces.

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Polymeric Ionic Liquids As Co2 Selective Sorbent Coatings For Solid-Phase Microextraction, Qichao Zhao, Jonathan C. Wajert, Jared L. Anderson Dec 2009

Polymeric Ionic Liquids As Co2 Selective Sorbent Coatings For Solid-Phase Microextraction, Qichao Zhao, Jonathan C. Wajert, Jared L. Anderson

Jared L. Anderson

Two polymeric ionic liquids (PIL) were synthesized and employed as sorbent coatings in solid-phase microextraction (SPME) for the selective extraction of CO2. The two coatings, poly(1-vinyl-3-hexylimidazolium) bis[(trifluoromethyl)sulfonyl]imide [poly(VHIM-NTf2)] and poly(1-vinyl-3-hexylimidazolium) taurate [poly(VHIM-taurate)], exhibited varied selectivity toward CO2 due to functional groups within in the PIL that imparted different mechanisms of CO2 capture. Extraction efficiencies were compared to those of two commercial SPME fibers [poly(dimethylsiloxane) (PDMS) and Carboxen−PDMS]. The poly(VHIM-NTf2) PIL fiber exhibited comparable extraction efficiency at high CO2 pressure compared to the Carboxen−PDMS fiber, even though the PIL-based fibers possessed much smaller film thicknesses. Calibration curves generated in pure CO2 …

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Empirical Determination And Forecastability Of Foreign Exchange Rate Of India., Rituparna Kar Dr. Dec 2009

Empirical Determination And Forecastability Of Foreign Exchange Rate Of India., Rituparna Kar Dr.

Doctoral Theses

The first chapter of this thesis begins with a brief review of the existing literature on foreign exchange rate models and their forecasting performance. Thereafter it presents the motivation as well as the main aspects of this study. The format of this chapter is as follows. A brief review of the relevant literature is presented in the first section. This review includes the important theoretical / structural as well as time series models of exchange rate. The motivation of the thesis is discussed in Section 1.2. Section 1.3 presents a brief account of the Indian economic reforms since 1993 with …

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Katina On Right Path To Test Tracking Technology, Courtney Trenwith, K. Michael Dec 2009

Katina On Right Path To Test Tracking Technology, Courtney Trenwith, K. Michael

Professor Katina Michael

No abstract provided.

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Double Superhelix Model Of High Density Lipoprotein, Zhiping Wu, Valentin Gogonea, Xavier Lee, Mathew A. Wagner Dec 2009

Double Superhelix Model Of High Density Lipoprotein, Zhiping Wu, Valentin Gogonea, Xavier Lee, Mathew A. Wagner

Chemistry Faculty Publications

High density lipoprotein (HDL), the carrier of so-called “good” cholesterol, serves as the major athero-protective lipoprotein and has emerged as a key therapeutic target for cardiovascular disease. We applied small angle neutron scattering (SANS) with contrast variation and selective isotopic deuteration to the study of nascent HDL to obtain the low resolution structure in solution of the overall time-averaged conformation of apolipoprotein AI (apoA-I) versus the lipid (acyl chain) core of the particle. Remarkably, apoA-I is observed to possess an open helical shape that wraps around a central ellipsoidal lipid phase. Using the low resolution SANS shapes of the protein …

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Photoassociation Spectroscopy Of Purely Long-Range Krypton Molecules, Z. Smith, J. Banister, R. Norman, K. Hoogeboom Dec 2009

Photoassociation Spectroscopy Of Purely Long-Range Krypton Molecules, Z. Smith, J. Banister, R. Norman, K. Hoogeboom

University Faculty Publications and Creative Works

Photoassociation spectra for purely long-range (PLR) krypton molecules are both computed and measured. The photoassociation laser is tuned just red of the 5s[3/2]2-5p[5/2]2 transition at 810.6 nm, over a frequency range in which fourteen different PLR potential wells support hundreds of vibrational bound states. In the experiment, laser light is directed into a cloud of magneto-optically trapped 84Kr atoms, and the emission of both ultraviolet photons and ions is monitored. Peaks in these signals are observed for laser frequencies within 200 MHz of the atomic resonance. Ongoing work is aimed at improving the experimental signal and understanding the degree of …

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Classical Modeling Of Non-Sequential Double Ionization: Recollision, Time-Delayed Ionization, Drift, And Possible Reattachment, Stanley L. Haan, Z. S. Smith, K. N. Shomsky, P. W. Plantinga Dec 2009

Classical Modeling Of Non-Sequential Double Ionization: Recollision, Time-Delayed Ionization, Drift, And Possible Reattachment, Stanley L. Haan, Z. S. Smith, K. N. Shomsky, P. W. Plantinga

University Faculty Publications and Creative Works

We employ 3d classical ensembles to study Non-Sequential Double Ionization (NSDI) of atoms by strong laser fields at visible and infrared wavelengths. We consider in particular the wavelength dependence of final electron drift directions and the net momentum spectra parallel to the laser polarization. We find that as the wavelength is increased the spectrum transitions from a singlet to a doublet, then to a triplet, and finally back to a doublet. We also show that electrons that escape the central potential-energy well during the pulse may nonetheless be bound to the nucleus after laser turnoff.

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Fully Differential Cross Sections For The Single Ionization Of Argon By Positron Impact At Intermediate Energies, Sebastian Otranto, Ronald E. Olson Dec 2009

Fully Differential Cross Sections For The Single Ionization Of Argon By Positron Impact At Intermediate Energies, Sebastian Otranto, Ronald E. Olson

Physics Faculty Research & Creative Works

In this work, we present theoretical fully differential cross sections (FDCS) for the single ionization of argon by positron impact obtained by means of the CDW-EIS model. the impact energies considered are 113.5 eV and 200 eV. the obtained angular distributions for 2eV and 5 eV emitted electrons are compared to those obtained for electron impact under the same energetic configuration. in particular, we show that the shape of the binary structure evolves from a single peak to a two-peak structure as the projectile scattering angle is increased. Similar conclusions apply for the usually termed recoil peak structure.

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1st And 2nd Order Contributions To The Double Ionization Of Argon Resulting From Positron And Electron Impact, Robert D. Dubois, O. G. De Lucio, J. Gavin Dec 2009

1st And 2nd Order Contributions To The Double Ionization Of Argon Resulting From Positron And Electron Impact, Robert D. Dubois, O. G. De Lucio, J. Gavin

Physics Faculty Research & Creative Works

Angular dependences for electron emission resulting from single and double ionization of argon are presented for 200, 500, and 1000 eV positron and electron impact. from these data, double to single ionization ratios are determined as a function of the emission direction. at each impact energy, these ratios have different angular dependences positive and negative particle impact. the positron and electron induced ratios are analyzed to provide information about how first- and second-order double ionization mechanisms interfere and contribute to the differential electron emission.

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Single Ionization Of Ne, Ar And Kr By Proton Impact: Single Differential Distributions In Energy And Angle, Sebastian Otranto, J. E. Miraglia, Ronald E. Olson Dec 2009

Single Ionization Of Ne, Ar And Kr By Proton Impact: Single Differential Distributions In Energy And Angle, Sebastian Otranto, J. E. Miraglia, Ronald E. Olson

Physics Faculty Research & Creative Works

Synopsis in this work we present a theoretical study of singly differential cross sections in energy and angle for the single ionization of neon, argon and krypton by proton impact. Theoretical results obtained by means of the Continuum Distorted Wave-Eikonal initial state (CDW-EIS) model are compared to those provided by the First-Born Approximation (FBA) and the classical trajectory Monte Carlo (CTMC) method as well as to experimental data from several laboratories. We note in particular for argon, that the CDW-EIS model does not reproduce the experimental data as accurately as expected, while the CTMC instead is in very good agreement.

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Exploring Differences Of Atomic And Molecular Ionization By Electron Impact, X. Ren, A. Senftleben, T. Pflüger, A. Dorn, I. Bray, D. V. Fursa, J. Colgan, M. S. Pindzola, O. Al-Hagan, Don H. Madison, J. Ullrich Dec 2009

Exploring Differences Of Atomic And Molecular Ionization By Electron Impact, X. Ren, A. Senftleben, T. Pflüger, A. Dorn, I. Bray, D. V. Fursa, J. Colgan, M. S. Pindzola, O. Al-Hagan, Don H. Madison, J. Ullrich

Physics Faculty Research & Creative Works

Electron impact single ionization of helium and the hydrogen molecule is studied at equivalent electron kinematics to explore the differences of atomic and molecular ionization. Fully differential cross sections (FDCS) were obtained covering the whole solid angle in order to critically test theoretical calculations.

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Longitudinal Recoil Ion Momentum Distributions For Proton-Argon Ionizing Collisions At Intermediate Energies, S. Otranto, Ronald E. Olson Dec 2009

Longitudinal Recoil Ion Momentum Distributions For Proton-Argon Ionizing Collisions At Intermediate Energies, S. Otranto, Ronald E. Olson

Physics Faculty Research & Creative Works

Synopsis Proton-argon ionizing collisions at intermediate energies are studied by means of the classical trajectory Monte Carlo method (CTMC). in particular, we focus on the longitudinal and transverse recoil momentum distributions for the process. We compare the profile of the longitudinal momentum distribution at the abrupt rise region corresponding to the electron capture to the continuum (ECC) processes, with those obtained for simpler targets like H and He. Selected subsets of the data show that the recoiling multielectronic ion plays a major role in the low energy electron emission, influencing the angular asymmetry of the electronic emission.

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New Double Ionization Channel Uncovered In Four-Particle Dalitz Plots, Michael Schulz, M. F. Ciappina, T. Kirchner, D. Fischer, R. Moshammer, J. Ullrich Dec 2009

New Double Ionization Channel Uncovered In Four-Particle Dalitz Plots, Michael Schulz, M. F. Ciappina, T. Kirchner, D. Fischer, R. Moshammer, J. Ullrich

Physics Faculty Research & Creative Works

Synopsis Double ionization in 6 MeV p + He collisions was analyzed in terms of 4-particle Dalitz plots.

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Triply Differential Measurements For 200 Ev E⁺-And E--Ar Collisions, O. G. De Lucio, Robert D. Dubois Dec 2009

Triply Differential Measurements For 200 Ev E⁺-And E--Ar Collisions, O. G. De Lucio, Robert D. Dubois

Physics Faculty Research & Creative Works

Triply differential single ionization yields for projectile scattering and electron emission are presented for 200 eV positron and electron impact ionization of argon. the projectile scattering and the electron emission are observed to be different for positron and electron impact.

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Electron Impact Ionization And Fragmentation Of C2h2, A. C.F. Santos, Robert D. Dubois, E. C. Montenegro Dec 2009

Electron Impact Ionization And Fragmentation Of C2h2, A. C.F. Santos, Robert D. Dubois, E. C. Montenegro

Physics Faculty Research & Creative Works

Ionization and fragmentation of C2H2 resulting from 750 eV electron impact is measured as a function of electron loss. Electron losses up to 400 eV are investigated. the interaction kinematics are investigated by measuring ejected electron-C2H2+ ion-scattered projectile coincidences and generating triply and doubly differential yields for the electron emission and projectile scattering respectively.

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Theoretical & Experimental (E,2e) Studies For Electron Impact Ionization Of Argon Measured In The Perpendicular Plane, Ola Al-Hagan, Christian Kaiser, Andrew Murray, Don H. Madison Dec 2009

Theoretical & Experimental (E,2e) Studies For Electron Impact Ionization Of Argon Measured In The Perpendicular Plane, Ola Al-Hagan, Christian Kaiser, Andrew Murray, Don H. Madison

Physics Faculty Research & Creative Works

FDCS for electron impact ionization of the Argon atom with equal energy outgoing electrons ranging from 1 eV to 25 eV are studied in the perpendicular plane.

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Theoretical Fully Differential Cross Sections For Transfer-Excitation Collisions, A. L. Harris, Jerry Peacher, Michael Schulz, Don H. Madison Dec 2009

Theoretical Fully Differential Cross Sections For Transfer-Excitation Collisions, A. L. Harris, Jerry Peacher, Michael Schulz, Don H. Madison

Physics Faculty Research & Creative Works

Synopsis Transfer-excitation calculations from a full four-body theoretical model will be compared with experiment.

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Double Differential Projectile Angular Distributions For Single Ionization Of Atomic Hydrogen By 75 Kev Proton Impact, A. C. Laforge, K. Egodapitiya, J. S. Alexander, A. Hasan, Michael Schulz Dec 2009

Double Differential Projectile Angular Distributions For Single Ionization Of Atomic Hydrogen By 75 Kev Proton Impact, A. C. Laforge, K. Egodapitiya, J. S. Alexander, A. Hasan, Michael Schulz

Physics Faculty Research & Creative Works

Synopsis Doubly differential cross sections (DDCSp) for single ionization of atomic hydrogen by 75-keV proton impact as a function of the projectile scattering angle and energy loss have been measured.

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