107 citations · 346 across the 16 of their papers we have counts for
16 papers
State and Network Structures of Stock Markets around the Global Financial Crisis
Jae Woo Lee, Ashadun Nobi
We consider the effects of the 2008 global financial crisis on the global stock market before, during, and after the crisis. We generate complex networks from a cross-correlation m…
Competition-induced increase of species abundance in mutualistic networks
Seong Eun Maeng, Jae Woo Lee, Deok-Sun Lee
Nutrients from a flowering plant are shared by its pollinators, giving rise to competition in the latter. Such exploitative competition of pollinators can limit their abundance and…
State and group dynamics of world stock market by principal component analysis
Ashadun Nobi, Jae Woo Lee
We study the dynamic interactions and structural changes in global financial indices in the years 1998-2012. We apply a principal component analysis (PCA) to cross-correlation coef…
Self-organized criticality of a simplified integrate-and-fire neural model on random and small-world network
Hyung Wooc Choi, Nam Jung, Jae Woo Lee
We consider the criticality for firing structures of a simplified integrate-and-fire neural model on the regular network, small-world network, and random networks. We simplify an i…
Correlation and Network Topologies in Global and Local Stock Indices
Ashadun Nobi, Sungmin Lee, Doo Hwan Kim +1
This study examined how the correlation and network structure of 30 global indices and 145 local Korean indices belonging to the KOSPI 200 have changed during the 13-year period, 2…
Network Topologies of Financial Market During the Global Financial Crisis
Ashadun Nobi, Seong Eun Maeng, Gyeong Gyun Ha +1
We consider the effects of the global financial crisis through a local Korean financial market around the 2008 crisis. We analyze 185 individual stock prices belonging to the KOSPI…