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• 2000-2004  (4)
• 1
Electronic Resource
Springer
The European physical journal 18 (2000), S. 353-358
ISSN: 1434-6052
Source: Springer Online Journal Archives 1860-2000
Topics: Physics
Notes: Abstract. Based on the variational-cumulant expansion (VCE), a new approach is adopted to determine the critical couplings for the deconfinement phase transition in SU(2) gauge theory for $N_\tau=2,3,4$ , and with both the standard Wilson action and the improved tree-level Symansik action. New results of the VCE which are close to the data of Monte Carlo (MC) simulations make manifest that the new approach is much more effective than the traditional one and show the consistence of a VCE analysis with an MC simulation.
Type of Medium: Electronic Resource
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• 2
Electronic Resource
Springer
The European physical journal 11 (2000), S. 167-173
ISSN: 1434-6079
Keywords: PACS. 32.70.Cs Oscillator strengths, lifetimes, transition moments - 32.80.Hd Auger effect and inner-shell excitation or ionization - 32.80.Fb Photoionization of atoms and ions
Source: Springer Online Journal Archives 1860-2000
Topics: Physics
Notes: Abstract: Extensive configuration interaction wave functions are determined to calculate the energies of the inner-shell excited states and the oscillator strengths of the optically allowed inner-shell transitions of C IV ion. Photoionization cross-sections of the ground and the first excited states of C IV ion are also obtained by using the R-matrix method. The positions of some inner-shell excited states are redetermined more accurately by analyzing the resonance structures of the photoionization processes. Some of the results are compared with other available theories and experiments.
Type of Medium: Electronic Resource
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• 3
Electronic Resource
Springer
Intensive care medicine 26 (2000), S. 1046-1056
ISSN: 1432-1238
Keywords: Key words Adult respiratory distress syndrome ; Outcome ; Computed tomography ; Lung morphology ; Lung mechanics ; Lung volumes
Source: Springer Online Journal Archives 1860-2000
Topics: Medicine
Notes: Abstract Objectives: (a) To assess whether differences in lung morphology observed in patients with adult respiratory distress syndrome (ARDS) are associated with differences in cardiorespiratory parameters, lung mechanics, and outcome. (b) To propose a new ARDS Severity Score to identify patients with a high mortality risk. Design: Prospective study over a 53-month period. Setting: Fourteen-bed surgical intensive care unit of a university hospital. Patients and participants: Seventy-one consecutive patients with early ARDS. Measurements and results: Cardiorespiratory parameters were measured using a Swan-Ganz catheter, the pressure-volume (PV) curve was measured using the gross syringe method, and fast spiral computed tomography (CT) was performed. Patients with diffuse attenuations (n = 16) differed from patients with lobar attenuations (n = 26) regarding: (a) mortality rate (75 % vs. 42 %, p = 0.05), (b) incidence of primary ARDS (82 % vs. 50 %, p = 0.03), (c) respiratory compliance (47 ± 12 vs. 64 ± 16 ml per cmH2O–1 p = 0.04), and (d) lower inflexion point (8.4 ± 2.0 vs. 4.6 ± 2.0 cmH2O, p = 0.001). A third group of patients with patchy attenuations (n = 29) had a mortality rate of 41 %, a respiratory compliance of 56 ± 18 ml per cmH2O–1 and a lower inflexion point of 6.3 ± 2.7 cmH2O. The bedside chest radiograph accurately assessed lung morphology in only 42 % of the patients. In contrast to the scores based on the bedside chest radiograph, a new ARDS Severity Score based on CT lung morphology and cardiorespiratory parameters identified a subgroup of patients with a high mortality rate (≥ 60 %). Conclusions: In patients with ARDS, differences in lung morphology are associated with differences in outcome and lung mechanics. A new ARDS Severity Score based on CT lung morphology and cardiorespiratory parameters accurately identified patients with the most severe forms of ARDS and a mortality rate above 60 %.
Type of Medium: Electronic Resource
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• 4
Electronic Resource
College Park, Md. : American Institute of Physics (AIP)
The Journal of Chemical Physics 115 (2001), S. 5711-5713
ISSN: 1089-7690
Source: AIP Digital Archive
Topics: Physics , Chemistry and Pharmacology
Notes: We report that dissociative electron attachment (DEA) to HCl is strongly enhanced by adsorption on the surface of H2O ice. The absolute DEA cross section at ∼0 eV for HCl adsorbed on ice is measured to be ∼4.0×10−15 cm2, which is two orders of magnitude higher than in the gas phase. This enhancement is essentially due to electron transfer from precursor states of the solvated electron in ice to an unfilled molecular orbital of HCl followed by its dissociation. This study indicates that electron-induced dissociation may be a significant process leading to HCl dissociation on ice surfaces in polar stratospheric clouds due to ionization by cosmic rays. © 2001 American Institute of Physics.
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