The present paper describes the application of growth models as suggested by Egghe and Ravichadra Rao (Scientometrics 25:5–46,
1992). The scope of the paper is limited to study the growth and dynamics of Indian and Chinese publications in the field
of liquid crystals research (1997–2006).
The main objectives of this study are: (a) to find the applicability of selected growth models to the growth of publications in six sub-disciplines of social sciences, namely anthropology, economics, history, political science, psychology, and sociology in the world; and (b) to verify the criteria for selecting the most appropriate growth model suggested by Eggheand Rao (1992).
Different approaches are introduced for studying the growth of scientific knowledge, as reflected through publications and authors. Selected growth models are applied to the cumulated growth of publications and authors in theoretical population genetics from 1907 to 1980. The criteria are studied on which growth models are to be selected for their possible application in the growth of literature. It is concluded that the power model is observed to be the only model among the models studied which best explains the cumulative growth of publication and author counts in the theoretical population genetics.
Climate change highly impacts on tree growth and also threatens the forest of the karstic terrains. From the 1980s the frequency of decay events of the Pinus nigra Arnold forests showed a marked increase in Hungary. To understanding the vulnerability of Pinus nigra forests to climate change on shallow karstic soils in continental-sub Mediterranean climatic conditions we developed the study of three sampled population in the typical karstic landscape of Veszprém in North Transdanubia. We built our model on non-invasive approach using the annual growth of the individuals. MPI Echam5 climate model and as aridity index the Thornthwaite Agrometeorological Index were used. Our results indicate that soil thickness up to 11 cm has a major influence on the main growth intensity, however, aridity determines the annual growth rate. Our model results showed that the increasing decay frequency in the last decades was a parallel change to the decreasing growth rate of pines. The climate model predicts the similar, increased decay frequency to the presents. Our results can be valid for a wider areas of the periphery of Mediterranean climate zone while the annual-growth based model is a cost-effective and simple method to study the vitality of pine trees in a given area.
The paper investigates Indian organic chemistry research activity during 1971–1989 using Chemical Abstracts. It attempts at quantification of national contribution to world efforts, and identify areas of relative strengths and weaknesses. Also models the growth of Indian organic chemistry output to world organic chemistry output as a whole and in sub-fields where the activity index for the world and India are similar.
The paper deals with the nature of growth models currently used in the literature for modeling the growth of publications.
It introduces briefly three growth models and explores the applicability of these models in the growth of world and Indian
physics literature. The analysis suggests that the growth of Indian physics literature follows a logistic model, while the
growth of world physics literature is explained by a combination of logistic and power models. The criteria for selection
of growth models based on the new growth rate functions suggested by Egghe and Ravichandra Rao are given. The methodology
suggested by Egghe and Ravichandra Rao is shown to work satisfactorily, except for longer time series growth data, when we
may have to restore to data splitting approach, if suggested by the plots of new growth rate functions. This approach helped
us to use a combination of two growth models instead of one, to explain the growth of world physics literature.
basis of power–time curves and theoretical model, thegrowth rate constant μ , peak-time T p , inhibitory ratio I , and half inhibiting concentration IC 50 were calculated. The relationships between μ and c were also established
growth modelThegrowth trend of high quality NHIRD studies was remarkable aside from their substantially rising number. Most (92.2%) of the NHIRD studies were indexed in the Science Citation Index 2008 at the