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1979

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Articles 1 - 13 of 13

Full-Text Articles in Physical Sciences and Mathematics

Centers Of Polymer Research; Polymer Science And Technology In The Ddr, Otto Vogl Dec 1979

Centers Of Polymer Research; Polymer Science And Technology In The Ddr, Otto Vogl

Otto Vogl

No abstract provided.

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Increased Access To Medical Care: The Impact On Health, Paula Diehr Oct 1979

Increased Access To Medical Care: The Impact On Health, Paula Diehr

Paula Diehr

Many federally financed programs have been launched to improve the access of the poor to medical care, under the assumption that this will improve their health. The effectiveness of these programs, however, has generally been measured by increased utilization rather than by improved health. The few studies which have considered health status have shown small or negative effects. Here, data are presented from a project which provided fully prepaid care to near poor families through existing sources in the community. A group of 748 enrollees was found to report worse health on four of five health indicators after one year …

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Equatorial Electricfields During Magnetically Disturbed Conditions, 1. The Effect Of The Interplanetary Magneticfield, Bela G. Fejer, C. A. Gonzales, D. T. Farley, M. C. Kelley, R. F. Woodman Sep 1979

Equatorial Electricfields During Magnetically Disturbed Conditions, 1. The Effect Of The Interplanetary Magneticfield, Bela G. Fejer, C. A. Gonzales, D. T. Farley, M. C. Kelley, R. F. Woodman

Bela G. Fejer

Radar measurements of E and F region drift velocities have been used to look for correlations between changes in equatorial electric fields and the interplanetary magnetic field (IMF). The east-west component of the IMF appears to be unimportant, but the north-south component has some effect; rapid reversals from south to north are sometimes correlated with reversals of the equatorial east-west electric field during both daytime and nighttime. This is not always true, however, the IMF may reverse without any apparent effect at the equator. Furthermore, large equatorial field perturbations are sometimes observed when the IMF Bz is large and southward …

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Vesicular-Arbuscular Mycorrhiza Influence Growth But Not Mineral Concentrations In Seedlings Of Eight Sweetgum Families, Richard C. Schultz, Paul P. Kormanik, W. Craig Bryan, G. H. Brister Jun 1979

Vesicular-Arbuscular Mycorrhiza Influence Growth But Not Mineral Concentrations In Seedlings Of Eight Sweetgum Families, Richard C. Schultz, Paul P. Kormanik, W. Craig Bryan, G. H. Brister

Richard C. Schultz

Seedlings of eight half-sib sweetgum (Liquidambar styraciflua L.) families were grown for 6 months in a fumigated soil mixture, with or without inoculum from a mixture of Glomus mosseae and Glomus etunicatus fungi, at levels of 140, 280, 560, and 1120 kg/ha of 10-10-10 fertilizer. All seedlings received three additions of 187 kg/ha of N during the growing season. Inoculated seedlings had significantly greater biomass, height, and stem diameters at each fertilizer level than nonmycorrhizal control seedlings. Significant differences in growth occurred between families in mycorrhizal plants. However, fertilizer did not significantly affect growth or nutrient uptake of the seedlings. …

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Hidrometalurjide Yeni, Fathi Habashi Jan 1979

Hidrometalurjide Yeni, Fathi Habashi

Fathi Habashi

Turkish translation of F. Habashi, “Recent Advances in Hydrometallurgy,” Proceedings International Mineral Processing Congress, Warsaw, 1979, edited by J. Laskowski, published by Elsevier, pp. 902–935

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Excited States And Photochemistry Of Saturated Molecules. Vii. Potential Energy Surfaces In Excited Singlet States Of Methane, Mark S. Gordon, James W. Caldwell Jan 1979

Excited States And Photochemistry Of Saturated Molecules. Vii. Potential Energy Surfaces In Excited Singlet States Of Methane, Mark S. Gordon, James W. Caldwell

Mark S. Gordon

Potential energy surfaces are investigated for a number of low‐lying excited singlet states of methane, using a split valence plus Rydberg basis set and singly excited CI. Of the six minima found, the lowest two are valence states. The lowest minimum corresponds to the products 1 1 B 1 CH2+1 1Σ g + H2, in agreement with the observed threshold photochemistry, and is accessible by five separate routes from the lowest vertical state. The second valence minimum is a square planar structure. Of the four Rydberg minima detected, one is a local minimum on the otherwise dissociative B 1surface and …

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Gas Phase Laser Induced Fluorescence Spectroscopy Of Cfcl, Stephen E. Bialkowski, David S. King, John C. Stephenson Jan 1979

Gas Phase Laser Induced Fluorescence Spectroscopy Of Cfcl, Stephen E. Bialkowski, David S. King, John C. Stephenson

Stephen E. Bialkowski

The CFCl radical has been produced in the gas phase by both IR multiphotonphotolysis of C2F3Cl and He metastable reaction with C2F3Cl. Single vibronic level fluorescence and excitation spectra taken of this species have yielded sufficient information to determine certain vibronic constants. The excited state was found to have an origin of T0=25 283±5 cm−1 with vibrational frequencies: ω2′=394±3 cm−1 and ω3′=739±5 cm−1. In the ground state, the vibrational frequencies were found to be: ω3″=118±10 cm−1, ω2″=448±6 cm …

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Equatorialelectric Fields During Magnetically Disturbed Conditions, 2. Implications Of Simultaneousauroral And Equatorial Measurements, C. A. Gonzales, M. C. Kelley, Bela G. Fejer, J. F. Vickrey, R. F. Woodman Jan 1979

Equatorialelectric Fields During Magnetically Disturbed Conditions, 2. Implications Of Simultaneousauroral And Equatorial Measurements, C. A. Gonzales, M. C. Kelley, Bela G. Fejer, J. F. Vickrey, R. F. Woodman

Bela G. Fejer

Simultaneous auroral and equatorial electric field data are used along with magnetic field data to study anomalous electric field patterns during disturbed times. During some substorms, accompanied by ring current activity, the worldwide equatorial zonal electric field component reverses from the normal pattern. This is interpreted as a partial closure of high latitude field aligned currents in the dayside, low latitude ionosphere. These currents flow westward across the dayside. In several cases the zonal equatorial electric field component was nearly identical in form to the zonal auroral component, indicating the close electrical coupling between these regions. Less certain, but equally …

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Temperature Dependent Spatial Order In Superfluid And Normal 4he, Robert Hallock, H. N. Robkoff, D. A. Ewen Jan 1979

Temperature Dependent Spatial Order In Superfluid And Normal 4he, Robert Hallock, H. N. Robkoff, D. A. Ewen

Robert Hallock

Measurements of the structure factor S(k) for 4He at constant density above and below Tλ are reported. The results show a clear loss of spatial order on cooling through Tλ. Application of the theory of Cummings, Hyland, and Rowlands to the data allows a measurement of the condensate fraction for He II.

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Behavior Of Persistent Currents Under Conditions Of Strong Decay, Robert Hallock, D. T. Ekholm Jan 1979

Behavior Of Persistent Currents Under Conditions Of Strong Decay, Robert Hallock, D. T. Ekholm

Robert Hallock

We report observations of the decay of persistent currents of thin superfluid 4He films for which the superfluid velocity deviates strongly from the previously observed logt behavior. We present data which document the evolution of this behavior as a function of film thickness. The Iordanskii-Langer-Fisher theory does not accurately describe our observation

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Laminations, Or How To Build A Quantum-Logic-Valued Model Of Set Theory, Lawrence Stout Dec 1978

Laminations, Or How To Build A Quantum-Logic-Valued Model Of Set Theory, Lawrence Stout

Lawrence N. Stout

An explicit construction of the colimit of a filtered diagram in the category of topoi and logical morphisms is given and then used to construct a family of topoi with a fixed Boolean algebra of truth values but with varying amounts of cocompleteness. This same construction, when applied to the diagram of complete Boolean algebras in a quantum logic Q gives a partial topos, a noncategory which is a close to being a model of set theory with algebra of truth values Q as a noncategory can be.

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Imaging Of Paramagnetic Centres In Diamond, M.J. R. Hoch, Anthony Roy Day Dec 1978

Imaging Of Paramagnetic Centres In Diamond, M.J. R. Hoch, Anthony Roy Day

Anthony Roy Day

An imaging method for determining the spatial distribution of paramagnetic nitrogen centres in diamond is described. Results are presented for a sample consisting of two small type IB diamonds.

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Band Matrices With Toeplitz Inverses, William F. Trench, T N. E. Greville Dec 1978

Band Matrices With Toeplitz Inverses, William F. Trench, T N. E. Greville

William F. Trench

No abstract provided.

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