High-precision HERA data corresponding to a luminosity of around 1 fb-1 have been used in the framework of eeqq contact interactions (CI) to set limits on possible high-energy contributions beyond ...the Standard Model to electron-quark scattering. Measurements of the inclusive deep inelastic cross sections in neutral and charged current ep scattering were considered. The analysis of the ep data has been based on simultaneous fits of parton distribution functions including contributions of CI couplings to ep scattering. Several general CI models and scenarios with heavy leptoquarks were considered. Improvements in the description of the inclusive HERA data were obtained for a few models. Since a statistically significant deviation from the Standard Model cannot be established, limits in the TeV range were set on all models considered.
High-precision HERA data corresponding to a luminosity of around 1 fb$^{-1}$ have been used in the framework of eeqq contact interactions (CI) to set limits on possible high-energy contributions ...beyond the Standard Model to electron-quark scattering. Measurements of the inclusive deep inelastic cross sections in neutral and charged current ep scattering were considered. The analysis of the ep data has been based on simultaneous fits of parton distribution functions including contributions of CI couplings to ep scattering. Several general CI models and scenarios with heavy leptoquarks were considered. Improvements in the description of the inclusive HERA data were obtained for a few models. Since a statistically significant deviation from the Standard Model cannot be established, limits in the TeV range were set on all models considered.
Gleich dreifach verbrückt sind die Nickelzentren
im Komplex Ni
2
L
9
4+
(L = NSF
2
NMe
2
), in dem erstmalig das Stickstoffatom einer NS‐Dreifachbindung als Brückenligand fungiert. Im Strukturbild ...rechts ist die Ni
2
‐Einheit mit allen koordinierenden Stickstoffatomen gezeigt.
magnified image
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Gleich dreifach verbrückt sind die Nickelzentren im Komplex Ni2L94+ (L = NSF2NMe2), in dem erstmalig das Stickstoffatom einer NS‐Dreifachbindung als Brückenligand fungiert. Im Strukturbild rechts ...ist die Ni2‐Einheit mit allen koordinierenden Stickstoffatomen gezeigt.
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We studied the dynamics of dissolved water in aluminosilicate glasses with the compositions NaAlSi{sub 3}O{sub 8}{center_dot}0.3H{sub 2}O, NaAlSi{sub 3}O{sub 8}{center_dot}1.3H{sub 2}O and Ca{sub ...0.5}AlSi{sub 3}O{sub 8}{center_dot}1.3H{sub 2}O using quasielastic neutron scattering. As shown by near-infrared spectroscopy on these samples, H{sub 2}O molecules are the predominant hydrous species in the water-rich glasses whereas OH groups bound to tetrahedrally coordinated cations are predominant at low water contents. Backscattering and time-of-flight methods were combined to investigate motional correlation times in the range between 0.2 ps and 2 ns. For the water-rich glasses an elastic scan between 2 K and 420 K shows that the dynamical processes set in at lower temperatures in the Ca-bearing glass than in the Na-bearing glass. This is corroborated by the broadening of the inelastic spectra S(Q,{omega}). The shape of the scattering function S(Q,t) suggests a distribution of activation barriers for the motion of hydrous species in the disordered structure of the glass. The distribution is narrower and the average activation energy is smaller in the Ca-bearing glass than in the Na-bearing glass. No indication for dynamics of hydrous species was found at temperatures up to 520 K in the water-poor glass NaAlSi{sub 3}O{sub 8}{center_dot}0.3H{sub 2}O containing dissolved water mainly in the form of OH groups. It is concluded that H{sub 2}O molecules are the dynamic species in the above-mentioned time regime in the water-rich glasses. The dynamic process is probably a rotation of H{sub 2}O molecules around their bisector axis.
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477.
Mimicry, Metaphor, and Mistake Behrens, Roy R.; Whitson, Paul D.
The Journal of aesthetic education,
01/1976, Volume:
10, Issue:
1
Journal Article
Peer reviewed
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Large lecture sections frequently permit insufficient flexibility to accomodate the diverse interests & abilities of students. By restructuring the lecture section with multiple options & small-group ...discussions, students were given an opportunity to participate in an exp'al teaching program (1967-1970). Comparative data were obtained on another group of students who did not participate in the exp. Student responses to the 2 teaching strategies were quite similar. Signif diff's were found when comparisons were controlled for the instructor. Students who pursued more sophisticated cognitive assignments tended to find the course more interesting. Students consistently expressed high appreciation for the opportunity to select one of several learning options. AA.
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Pseudomonas aeruginosa Keratitis in rabbit eyes was treated with Tobramycin in combination with cortisone. There was no statistically significant difference between this combination and the ...antibiotic alone in this experimental model. Moderate doses of cortisone, applied subconjunctivally in addition to Tobramycin produced the best results.
