Zobrazeno 1 - 10 of 46 pro vyhledávání: '"D. G. Lappas"'
1
Orientation dependence of high-order harmonic generation in hydrogen molecular ions
Autor: J P Marangos, D G Lappas
Publikováno v: Journal of Physics B: Atomic, Molecular and Optical Physics. 33:4679-4689
We show that the direction of laser polarization with respect to the molecular axis of a linear molecule can have a significant effect on high-harmonic generation. Numerical integration of the two-dimensional Schrodinger equation of the H2+ and the H
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f5e091dee354ba994ad13869059f4817
https://doi.org/10.1088/0953-4075/33/21/313
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2
Two-electron effects in harmonic generation and ionization from a model He atom
Autor: Peter L. Knight, Rainer Grobe, Joseph H. Eberly, K. Burnett, J. B. Watson, D. G. Lappas, Anna Sanpera
Publikováno v: Journal of Physics B: Atomic, Molecular and Optical Physics. 29:L619-L627
We present numerical ab initio calculations for a two-electron quantum system that is a one-dimensional analogue of the He atom in a strong laser field. Electron correlation occurring within this model can be treated exactly. We compare our calculati
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b08126751fae1846496a07d0ee6d9056
https://doi.org/10.1088/0953-4075/29/16/005
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3
The impact of heparin concentration and activated clotting time monitoring on blood conservation
Autor: Lawrence T. Goodnough, Alexander Alsoufiev, Edward L. Spitznagel, M. Rosenblum, Samuel A. Santoro, J. H. Joist, Kathy M. Kater, Charles W. Hogue, G. J. Despotis, D. G. Lappas
Publikováno v: The Journal of Thoracic and Cardiovascular Surgery. 110(1):46-54
A whole blood hemostasis system (Hepcon) provides both activated clotting time and accurate whole blood heparin concentration measurements via an automated protamine titration method. This study was designed to prospectively evaluate the impact of he
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9cc8803af81e3d255ea823718f31e978
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4
Comparison of activated coagulation time and whole blood heparin measurements with laboratory plasma anti-Xa heparin concentration in patients having cardiac operations
Autor: A. L. Summerfield, J. H. Joist, James Lewis Cox, G. J. Despotis, Lawrence T. Goodnough, E. Spitznagel, D. G. Lappas, Samuel A. Santoro
Publikováno v: The Journal of Thoracic and Cardiovascular Surgery. 108:1076-1082
Previous reports suggest that activated clotting times do not correlate with heparin concentration during cardiopulmonary bypass. This study was designed to compare whole blood heparin concentration and activated clotting time measurements with labor
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dac0696545677bc07d8353c5fbc46eeb
https://doi.org/10.1016/s0022-5223(94)70150-4
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5
Prospective evaluation and clinical utility of on-site monitoring of coagulation in patients undergoing cardiac operation
Autor: Patrick Barnes, James L. Cox, D. G. Lappas, Edward L. Spitznagel, Kathy M. Kater, Samuel A. Santoro, G. J. Despotis
Publikováno v: The Journal of Thoracic and Cardiovascular Surgery. 107:271-279
Although laboratory coagulation tests permit a rational approach to both diagnosis and management of coagulation disorders after cardiopulmonary bypass, their clinical utility is limited by delays in obtaining results. This study was designed to eval
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f7b51dc53251a808a259499a2e963fd4
https://doi.org/10.1016/s0022-5223(94)70481-3
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6
Electron capture in multiphoton-assisted electron-atom scattering
Autor: D. G. Lappas, Joseph H. Eberly, Rainer Grobe
Publikováno v: Physical Review A. 43:388-397
We have solved Schr\"odinger's equation numerically to obtain fully photon-dressed wave functions for an electron in a strong radiation field while it undergoes a collision with a model one-dimensional hydrogen atom. We have investigated a regime in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b36ed538214c30a3eedccc4f6b7b68ae
https://doi.org/10.1103/physreva.43.388
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8
Time-dependent effects in the nonsequential ionization of helium at various wavelengths
Autor: P. P. Corso, D. G. Lappas, Peter L. Knight
Calculations of the double ionization of a model 1D helium atom interacting with an intense short laser pulse are presented. A substantial signature of nonsequential double ionization is found for all the wavelengths that are considered, from 248 nm
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33bcd327a743fec8cc9daee0eb91a1dd
http://hdl.handle.net/10044/1/204
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10
Effects of pulse duration and wavelength on the nonsequential ionization of helium
Autor: D. G. Lappas, Peter L. Knight, P. P. Corso
Publikováno v: AIP Conference Proceedings.
We report calculations of the ionization yields of a model one-dimensional He atom in strong and short laser pulses. We use both an exact fully correlated two-electron scheme and an approximate model known as “crapola”. For a wide range of freque
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::48904a7c52c56726a6c03b41d7cd53ba
https://doi.org/10.1063/1.1291943
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