Search

Analysis of the Social Sciences Citation Index (SSCI) database determined the growth of frequency of use of the term globalization during 1989-1995. Lists globalized items during 1989-1995: business, industry, production, and technology. Notes that science has not become globalized because it is still supported and managed by national governments. Contains 52 references. (PEN) more...

The characterization of the purity of fullerenes is based on the concept of defining the percentage amount of the main component (e.g., [C.sub.60], [C.sub.70], etc.) versus the minor fractions or microfractions of the homologue species and/or other polycyclic organic compounds. It has also to be considered that fullerene products may be contaminated in some degree by element impurities as well, both from the production processes and from the various precursor materials themselves. We report here for the first time detailed data on trace element impurities in various fullerene precursors as well as in the main [C.sub.60] and [C.sub.70] fullerene products of different producers, measured by instrumental neutron activation analysis. The concentration distributions of about 35 trace elements have been studied, including the determination of the relevant limits of detection. It could be established that all fullerene materials investigated contain a broad scale of trace elements distributed within a fairly wide concentration range, from ppb (ng/g) up to ppm ([[micro]gram]/g) levels. For some impurity elements, extremely high concentration levels were found, indicating that elemental impurities have to be considered when studying the electrical, magnetic, and other features of the fullerenes. more...

The paper tries to find out the working mechanism of birth of one of the nowadays most used scientometric indicators, the Hirsch-index. The effort spent deals with the human feeling called frustration. It is shown how the frustration of a physicist became the basis of an invention of an indicator considered worldwide the best for evaluating the scientific performance of individual researchers. [ABSTRACT FROM AUTHOR] more...

Trace element concentrations in graphite soot, [C.sub.60], and [C.sub.70] have been determined by instrumental neutron activation analysis. It has been shown that all these materials contain trace element impurities at parts-per-billion and even parts-per-million concentration levels. As structural and physical properties are known to be sensitive to such dopant concentrations of trace element impurities, it is argued that future investigations on electrical, magnetic, and the properties of fullerenes will have to consider the concentration of trace element impurities in these materials. more...