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Abstract


ANALYSIS OF RARE EARTH ELEMENTS (REE) IN THE LITERATURE BY USING N-GRAM METHOD AND COMPARISON WITH SOCIAL / POLITICAL / ECONOMIC EVENTS

N-gram analysis method is widely used in different fields. In this study, time-dependent changes in the usage rate of rare earth elements (REE), which is an important raw material of technological studies / inventions, with n-gram analysis method are discussed. The aim of this study is to investigate the relationship between political / social / economic events that affect / are affected by this change by n-gram analysis. In this study, firstly, the concept of REE was analyzed and then each element in the REE group was analyzed separately. The element Yttrium (Y) was also included in the n-gram analysis because it was evaluated together with REE due to the similarity of use and behavior. The results of the analysis were evaluated together and the analysis data and the parallelism of political / social / economic events were examined. The parallel political / social / economic events were examined in detail and the relationship between the results and the analysis was investigated. When the n-gram analysis for REE was examined, it was found that they did not appear in the literature until the 1900s. The use of REEs in the literature has increased in parallel with the discovery of the elements and their use in technology. While the use of REE in the literature increased with a slow tendency until the 1920s, a significant increase was observed after the 1920s, although the economic stagnations showed partial decreases, the tendency to increase did not change at all. After a significant increase with the development of information technologies in the 1960s, it showed some decline, the invention of high-tech products, the use of alternative raw materials continued to increase, the use of alternative raw materials, and China as a result of the use of this power in manipulations. After the 2000s, a downward trend was observed.



Keywords
N-gram Analysis, Rare Earth Elements (REE), World Politics



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