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Signum Equations and Extremal Coefficients

(CuI)P4Se4: An Adduct of Polymeric P4Se4 with CuI

Pure yellow (CuI)P4Se4 was prepared by reaction of stoichiometric amounts of CuI, red P, and gray Se in evacuated silica ampoules. The crystal structure was determined from single crystals at room temperature. (CuI)P4Se4 crystallizes in the orthorhombic system, space group Cmca with a = 14.770 (1) AÊ , b = 12.029 (1) AÊ , c = 12.449 (1) AÊ , V = 2211.9(6) AÊ , and Z = 8. The structure refinemen...

SIGNUM: A Graph Algorithm for Terminology Extraction

Terminology extraction is an essential step in several fields of natural language processing such as dictionary and ontology extraction. In this paper, we present a novel graph-based approach to terminology extraction. We use SIGNUM, a general purpose graph-based algorithm for binary clustering on directed weighted graphs generated using a metric for multi-word extraction. Our approach is total...

717-722 Cui Y.pmd

Diphyllobothrium latum infection in human is not common in China and only 15 cases have been reported since 1927. We document a case of Diphyllobothrium latum infection caused by the ingestion of raw fish in a 23-year-old woman in Dalian (Liaoning Province), and diphyllobothriasis latum in China is briefly reviewed. The patient experienced abdominal discomfort for about 6 months with a history ...

The Signum Equation for Erdős-surányi Sequences

For an Erdős-Surányi sequence it is customary to consider its signum equation. Based on some classical heuristic arguments, we conjecture the asymptotic behavior for the number of solutions of this signum equation in the case of the sequence {n}n (k 2) and the sequence of primes. Surprisingly, we show that this method does not apply at all for the Fibonacci sequence. By computing the precise nu...