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  • Author or Editor: Hildrun Kretschmer x
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Abstract  

The supposition for Pinski's measures of research interactivity is a size reduced form of a citation matrix, which makes it possible to compare journals of different sizes. A futher development of the measures of research interactivity can be achieved by using a complex structure measure. In addition to the relative scope of citations, which is taken into consideration by Pinski's measures, the distributions of these values on the elements of the matrix are involved in calculating new measures of interactivity whose content is different from that of Pinski's measures.

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Abstract  

In invisible colleges the relative frequency of coauthorships is higher between scientists with the same number of publications than between authors of different ones. The opposite is valid in institutionalized communities.

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Abstract  

A complex structure measure for social groups was established with a view to reflecting the degree of interaction within a social group. The quantitative degrees of relationship between two group members each and their distributions within the group are considered. These distributions can be characterized quantitatively on different hierarchical levels to which a specific meaning can be attributed. The complex structure measure is a combination of measures for the different hierarchical levels. A stratification of scientists based on the number of publications in a journal is reflected in the results obtained by the complex structure measure. Specific information is provided both by the complex structure measure and by the measure on different levels.

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Abstract  

A theoretical approach was developed to raising the effectivenes of research groups as adaptable systems. If performance is the aim of the research group, adaptation to the changing conditions in the research process has to be one of its essential principles underlying its development. Empirically it was shown that several independent components of the cooperation structure that were simultaneously adapted to different changing conditions exerted a strong influence on performance. There is the hypothesis that the principle of adaptation of cooperation structure can be generally extended to the adaptation of other group characteristics.

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Abstract  

A complex structure measure for social groups was applied to the structure of citations in a journal. The citation structure reflected LOTKA's law on the various levels of group structure measure. On the first structure level the reciprocal effect of social and cognitive factors became discernible. The different hierarchical levels of the structure measure were a reflection of the logarithm of number of publications per author obtained in a group of authors with a definite number of publications.

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Abstract  

The characteristic structure underlying interpersonal relations in social networks in general is identifiable in a great number of such social processes, as the spread of diseases, the propagation of information, the change of views or the dissemination of technological innovations. The patterns of behaviour reflected in the coauthorship networks of the invisible colleges of physics, resemble the general structure of relations identified in social networks beyond the communities of scholars. The patterns of behaviour are portrayed both as two-dimensional and three-dimensional models.

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Abstract  

This study deals with the uniformity of the collaboration process within the scientist's system by describing all two-dimensional and three-dimensional referential patterns with only one nonliear function. The variety of these patterns is expressed in dependence upon the conditions or environment that induced them by means of varying the parameters of this non-linear function. Based on their similarity these various patterns can be divided into different types.

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