1,116 research outputs found
Development of cathodic electrocatalysts for use in low temperature H2/O2 fuel cells with an alkaline electrolyte Second quarterly report, Oct. 1 - Dec. 31, 1965
Cathodic electrocatalysts for use in low temperature hydrogen-oxygen fuel cells with an alkaline electrolyte-corrosion resistance and activity testing of materials and element
CT and ultrasonographic findings in jugular vein ectasia.
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/135231/1/jum198439417.pd
Development of cathodic electrocatalysts for use in low temperature H2/O2 fuel cells with an alkaline electrolyte First quarterly report, Jul. 1 - Sep. 30, 1965
Potentiostatic and corrosion resistance tests for metallic ingots prepared as rotating disk electrodes - cathodic electrocatalysts for use in low temperature hydrogen-oxygen fuel cell
Development of cathodic electrocatalysts for use in low temperature H2/O2 fuel cells with an alkaline electrolyte Third quarterly report, Jan. 1 - Mar. 31, 1966
Metal, alloy, and metal compound testing for corrosion resistance and activity as oxygen electrodes for hydrox fuel cell with alkaline electrolyt
Applying Imidacloprid Via a Precision Banding System to Control Striped Cucumber Beetle (Coleoptera: Chrysomelidae) in Cucurbits
The striped cucumber beetle, Acalymma vittatum (F.) (Coleoptera: Chrysomelidae), is a key pest of cucurbit crops throughout its range. A novel precision band applicator was designed to inject a solid stream of imidacloprid solution in-furrow directly over the seed during planting to reduce beetle leaf feeding on pumpkin, zucchini, and cucumber crops. In 2004 and 2005, bioassays at the cotyledon through fifth leaf were conducted on striped cucumber beetles using seedling leaf tissue grown from seeds treated using both continuous and precision banded in-furrow imidacloprid solution applications. In 2004, 80% of bioassay trials had treatments with beetle mortality significantly higher than the check, whereas 70% of the bioassay trials showed no significant difference in mortality between continuous in-furrow and precision banded treatments. In 2005, 79% of bioassay trials had treatments with beetle mortality significantly higher than the check, whereas 100% of the bioassays showed no significant difference in beetle mortality between continuous in-furrow and precision banded treatments at the same insecticide rate. The environmental savings of precision banded treatments compared with continuous in-furrow treatment reduced imidacloprid up to 84.5% on a per hectare basis for all cucurbits tested in 2004 and 2005, translating into an economic savings up to 030215/ha. In separate bioassay trials conducted in 2005 on pumpkin, where insecticide band length and injection volume were manipulated independently, several treatments had significantly higher beetle mortality than the check. There was a trend of increased beetle mortality in treatments using shorter band lengths combined with higher insecticide solution volumes
[3-(5-Hydroxy-5H-dibenzo[a,d]cyclohepten-5-yl)propyl]dimethylammonium 3-carboxyprop-2-enoate
In the cation of the title salt, C20H24NO+·C4H3O4
−, the N atom in the dimethylammonium group is protonated. The dihedral angle between the mean planes of the two six-membered rings fused to the cyclohepten-5-yl ring is 54.4 (1)°. An intramolecular O—H⋯O hydrogen bond occurs in the anion. The crystal packing is stabilized by intermolecular O—H⋯O and N—H⋯(O,O) hydrogen bonds and weak C—H⋯O interactions, forming a two-dimensional network
N 1,N 2-Bis[(2-chloro-6-methylquinolin-3-yl)methylidene]ethane-1,2-diamine
The title molecule, C24H20Cl2N4, lies on an inversion center in an extended trans conformation. In the crystal, weak C—H⋯Cl interactions connect the molecules into chains along [010]
2-(4-Fluorophenyl)-1-phenyl-1H-imidazo[4,5-f][1,10]phenanthroline monohydrate
In the title compound, C25H15FN4·H2O, the fused ring system is essentially planar [maximum deviation of 0.0822 (14) Å]. The imidazole ring makes dihedral angles of 76.83 (7) and 32.22 (7)° with the phenyl group attached to nitrogen and the fluorobenzene group to carbon, respectively. The dihedral angle between the two phenyl rings is 72.13 (7)°. Intermolecular O—H⋯N, O—H⋯F, C—H⋯F, C—H⋯O and C—H⋯N hydrogen bonds are found in the crystal structure
Machine-learning-corrected quantum dynamics calculations
Quantum scattering calculations for all but low-dimensional systems at low
energies must rely on approximations. All approximations introduce errors. The
impact of these errors is often difficult to assess because they depend on the
Hamiltonian parameters and the particular observable under study. Here, we
illustrate a general, system and approximation-independent, approach to improve
the accuracy of quantum dynamics approximations. The method is based on a
Bayesian machine learning (BML) algorithm that is trained by a small number of
rigorous results and a large number of approximate calculations, resulting in
ML models that accurately capture the dependence of the dynamics results on the
quantum dynamics parameters. Most importantly, the present work demonstrates
that the BML models can generalize quantum results to different dynamical
processes. Thus, a ML model trained by a combination of approximate and
rigorous results for a certain inelastic transition can make accurate
predictions for different transitions without rigorous calculations. This opens
the possibility of improving the accuracy of approximate calculations for
quantum transitions that are out of reach of rigorous scattering calculations.Comment: 6 pages, 4 figure
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