The sgn-normalized rank-one Drinfeld modules 4> associated with all elliptic curves E over ¥q for 4 < q < 13 are computed in explicit form. (Such 4> for q < 4 were computed previously.) These computations verify a conjecture of Dormán on the norm of j{) = aq+l and also suggest some interesting new properties of . We prove Dorman's conjecture in the ramified case. We also prove the formula...

The most intense hard x -ray source in the confused region in Scorpius has been identified as 4U1700-37 ( =HD153919). Observations extending over three binary periods in 1978 September were carried out with the high energy x-ray spectrometer on OSO-8. The 3.4-day modulation is seen above 20 keV with the intensity during eclipse being consistent with zero flux. The photonnumber spectrum from 20 ...

limited supplies last, single copies of the monographs may be obtained free of charge from the National Clearinghouse for Alcohol and Drug Information (NCADI). Please also contact NCADI for information about availability of coming issues and other publications of the National Institute on Drug Abuse relevant to drug abuse research. Additional copies may be purchased from the U.S. Government Pri...

A theory of double radio sources which have a '2' or 'S' morphology is proposed, based on the refraction of radio jets in the extended atmosphere of an elliptical galaxy. The model describes a collimated Jet of supersonic material bending self-consistently under the influence of external static pressure gradients. Gravity and magnetic fields are neglected in the simplest case except insofar as ...

the basic National horizontal and vertical networks of geodetic control and provides governmentwide leadership in the improvement of geodetic surveying methods and instrumentation, coordinates operations to assure network development, and provides specifications and criteria for survey operations by Federal, State, and other agencies. NGS engages in research and development for the improvement ...

The NASA Astrophysics Data System in conjunction with the Wolbach Library at the Harvard-Smithsonian Center for Astrophysics is working on a project to microfilm historical observatory publications. The microfilm is then scanned for inclusion in the ADS. The ADS currently contains over 700,000 scanned pages of volumes of historical literature. Many of these volumes lack clear pagination or othe...

Digital imaging can play an important role in helping to preserve brittle library and archival materials, especially those characterized by color and oversize illustrations, neither of which can be satisfactorily preserved by analog methods. Used together, film intermediaries can provide long-term stable copies while digital versions can provide improved scholarly access. Setting benchmarks for...