The study of different citation windows of research fronts in OLED: using bibliographic coupling and co-citation methods

• Main Authors: Chia-Pin Chang, 張嘉彬
• Other Authors: Mu-Hsuan Huang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/61318243074903395202

博士 === 國立臺灣大學 === 圖書資訊學研究所 === 99 === Research fronts are the most pioneering studies of specialities. With the command of the development of research fronts, one can easily realize the focus of study in present specialities and the future development trends. In the point of planning blueprint on national development and making policies on science and technology development, research fronts are also an important reference. Consequently, it nowadays receives a great many attention and emphasis. This study is targeted at 210 highly-cited articles on OLED field, combining both bibliographic coupling and co-citation methods, exploring research fronts produced by the following three citation windows which include fixed citation window, sliding window and half life（including citing half life and cited half life）. It is undertaken to explore the advance of OLED research fronts from 2000 to 2009 and aims to analyze the values of currency index and the values of stability index and so as to decide from which values can be taken as important bases to predict the emergence of research fronts. The results show that among the above mentioned three citation windows, sliding window can find out the most many research fronts; fixed citation window is the easiest and the most effective way to find out research fronts; and half life can be a complement way for sliding window and fixed citation window to find out research fronts. In addition, research fronts has five different types, including emerging fronts, growing fronts, stable fronts, shrinking fronts, and existing fronts. Among which, emerging fronts is the symbol of future research trend and highly emphasized by scholars and experts. Furthermore, sliding window can discover the most many emerging fronts. By using bibliographic coupling and co-citation methods to make comparison in the research fronts produced by the above mentioned three citation windows, it illustrates that the effect is quite equal and can be supplement for one another. In order to find out research fronts effectively among the three citation windows, it is suggested to adopt bibliographic coupling for fixed citation window, bibliographic coupling for sliding window, and citing half life for half life. Moreover, on purpose of seeking out research fronts in a precise and systematical way, the study demonstrates the capability to predict the emergence of research fronts in the next citation window with the indexes of currency and stability. The results show that currency index 0.500 and stability index 0.400 can be the best indicator to forecast the emergence of research fronts. Based on the above research results, it is recommended that adopting fixed citation window is the easiest and the most effective way to find out research fronts; adopting sliding window can find out the most many research fronts and also discover emerging fronts at most. Last but not least, between two methods, it is suggested to adopt bibliographic coupling to find out the most many research fronts and discover the emergence of research fronts earlier. Finally, this study advises to add currency index and stability index to relative studies in order to predict the emergence of research fronts effectively and have a better command of the latest development trends of specialities.