POSTECH News

Prof. PooGyeon Park’s Article Most Cited in Automatica Since 2010

2015-07-15 1,042
 Prof. PooGyeon Park’s Article Most Cited in Automatica Since 2010
 
When several electronic devices are linked through fixed and mobile connections, time-delays inevitably occur due to the limitation of data transmission speed; it is known that systems with these types of aftereffects often experience instability or performance degradation. Substantial research efforts have been made to tackle this problem and POSTECH researchers are reported to have provided an important foundation for the related literature. An article published by Dr. PooGyeon Park, a professor of the Department of Electrical Engineering at POSTECH, was selected as the most cited article in Automatica for the past five years.

Widely known as one of the leading international peer-reviewed journals in the field of systems and control, along with the IEEE Transactions on Automatic Control, Automatica has a noteworthy impact on other fields of science and technology.

According to Scopus, the largest citation database in the world, Park’s paper on a reciprocally convex approach to stability of systems with time-varying delays has been cited 398 times since its publication in 2011. The second most-cited article, although published a year earlier than Park’s, was cited no more than 316 times showing that the academic community has taken more notice of Park’s findings.

Park’s research has much improved the accuracy in judging the stability of systems with time-varying delays. In the field of automatic control, stability of time-delay systems (TDS) is a key question; yet, previous studies have reported much difficulty in finding the minimum value of inverse convex combination, which is a critical piece of information in judging the stability for the systems with time-varying delays. The common practice, therefore, was to find the minimum by approximation until Park suggested a new lower bound lemma and provided a basis for a stability criterion that directly handles the inversely weighted convex combination.

Automatica makes monthly announcements of most cited articles featured in the journal in the past five years, and Park’s paper was ranked top among articles that were published since January 2010.