THE U. S. BIOLOGICAL STATION AT BEAUFORT, N. C., DURING 1916

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Rietveld R E F I N E M E N T of the Kaolinite S T R U C T U R E at 1.5 K

-The crystal structure of Keokuk kaolinite, including all H atoms, was refined in space group C1 using low-temperature (1.5 K) neutron powder diffraction data (~ = 1.9102 A) and Rietveld refinement/ difference-Fourier methods to R,,,p = 1.78%, reduced x 2 = 3.32. Unit-cell parameters are: a = 5,1535(3) /~, b = 8.9419(5) &, c = 7.3906(4) &, a = 91.926(2) ~ = 105.046(2) ~ 7 = 89-797(2) ~ and V= 3...

I N D O C U M E N T I M a G E S

A method for analyz ing the structu re of the white backgr ound in docu ment images is describ ed, along with applic ations to the proble m of isolati ng blocks of machine -printe d text. The appro ach is based on computa tionalgeometry algorith ms for off-li ne enumera tion of maximal white rectan gles and on-line rectan gle unific ation. These suppo rt a fast, simple, and gener al heuri stic ...

U N I -f O K U S

• BioGeoChemie des Watts Auf Beschluss der Deutschen Forschungsgemeinschaft wird an der Universität Oldenburg für die Dauer von sechs Jahren eine Forschergruppe "BioGeoChemie des Watts" eingerichtet. In den ersten drei Jahren erhält die Gruppe fast sechs Millionen DM Förderung. Der Antrag wurde federführend vom Institut für Chemie und Biologie des Meeres (ICBM) vorbereitet. Beteiligt sind außer...

U S . Patent N 7 Mar . 4 ,

Eberhardt Et AI., A Robotics Inverse Kinematics Problem Implemented on Neural Network Hardware with GradientDescent Learning, Expert Systems and Neural Networks, Aug. 1990, pp. 70-73, International Association of Science and Technology for Development, Honolulu, HI. Eberhardt Et AI., Analog VLSI Neural Networks: Implementation Issues and Examples in Optimization and Supervised Learning, IEEE Tr...