There are some positive changes on the two sides of the Korean Peninsula in 2018;the situation on the peninsula has released a signal of relaxation;it seems that the Korean Peninsula presents the “double suspension”...There are some positive changes on the two sides of the Korean Peninsula in 2018;the situation on the peninsula has released a signal of relaxation;it seems that the Korean Peninsula presents the “double suspension” situation which has been advocated by the Chinese government, and both the two sides of the Korean Peninsula have shown a strong will to ease the tension on the peninsula, and promote the inter-Korean relations to ease and improve the bilateral relations. As a close neighbor of the Korean Peninsula, in the face of the current situation on the peninsula, China should focus on deepening cooperation between China and the United States on the Korean nuclear issue, institutionalize the development of inter-Korean relations, and enhance its capability to resolve the Korean nuclear issue peacefully.展开更多
The XXIII Olympic Winter Games in South Korea lit a flame for the dramatic development of inter-Korean relations.Rapid changes in the geopolitical situation on the peninsula since the Winter Olympics in Pyeongchang ha...The XXIII Olympic Winter Games in South Korea lit a flame for the dramatic development of inter-Korean relations.Rapid changes in the geopolitical situation on the peninsula since the Winter Olympics in Pyeongchang have included high-level DPRK talks with South Korea,China and the United States.President Xi Jinping’s meetings with DPRK leader Kim Jong-un in Beijing and Dalian,and the upcoming Trump-Kim summit on June 12 are all about timing.A new diplomacy on DPRK’s part has unfolded out of the external pressure the DPRK experienced from the US,China and the international community but also out of the difficulties the DPRK faces in advancing its nuclear options.Unless the DPRK makes substantial concessions,the US will not alter policy.Real success means historic change,not only a reunion of families and an official end to the Korean War,but also a potential shift in the Asian power structure.There are diverse possibilities and much at stake.The fundamental way forward is restarting Six Party Talks and regional mechanism.展开更多
Petrological,chronological and geotectonic geological analysis of Precambrian metamorphic rock in Korean Peninsula shows that the remnants(>3.4 Ga) of continental nuclei crust were formed in the Paleoarchean in the...Petrological,chronological and geotectonic geological analysis of Precambrian metamorphic rock in Korean Peninsula shows that the remnants(>3.4 Ga) of continental nuclei crust were formed in the Paleoarchean in the Rangrim Massif.In the massif,the main formation ages of continental crust range from 3.2 Ga to 2.5 Ga,its important growing period was 2.8-2.5 Ga.The subsequent expansion period of the Rangrim Massif was 2.4-2.2 Ga.The division events occurred in 1.85 Ga and in the Late Paleoproterozoic--Early Mesopro-terozoic,respectively.Since then the massif was relatively stable.However,the last division of the Rangrim Massif occurred at 793 Ma.展开更多
Endemic plants are important for understanding phylogenetic relationships,biogeographical history,and genetic variation because of their restricted distribution and their role in conserving biodiversity.Here,we invest...Endemic plants are important for understanding phylogenetic relationships,biogeographical history,and genetic variation because of their restricted distribution and their role in conserving biodiversity.Here,we investigated the phylogenetic relationships of the Korean endemic Fraxinus chiisanensis by reconstructing the molecular phylogeny of Fraxinus based on two nuclear DNA(nrITS and phantastica)and two chloroplast DNA(psbA-trnH and rp132-trnL)regions.Within our fossil-calibrated phylogenetic framework,we also inferred the biogeographical history of F.chiisanensis.To provide a scientific basis for the conservation of F.chiisanensis,we determined the levels of genetic diversity and genetic differentiation in this species.Combining information from nuclear and chloroplast DNA sequence data,our molecular phylogenetic analyses identified F.chiisanensis as a genetically distinct unit from its sister group,Fraxinus platypoda from Japan.Our molecular dating analyses using nuclear and chloroplast DNA data sets show F.chiisanensis diverged from its sister F.platypoda in the Early or Middle Miocene and differentiated in the Late Miocene on the Korean Peninsula.Our results suggest that the divergence of F.chiisanensis was associated with the submergence of the East China Sea land bridge and enhanced monsoons in East Asia.When compared to F.platypoda,F.chiisanensis exhibits low genetic diversity within populations and high genetic differentiation among populations.These results help us to understand the evolutionary history of F.chiisanensis and to develop a conservation strategy for this species.展开更多
文摘There are some positive changes on the two sides of the Korean Peninsula in 2018;the situation on the peninsula has released a signal of relaxation;it seems that the Korean Peninsula presents the “double suspension” situation which has been advocated by the Chinese government, and both the two sides of the Korean Peninsula have shown a strong will to ease the tension on the peninsula, and promote the inter-Korean relations to ease and improve the bilateral relations. As a close neighbor of the Korean Peninsula, in the face of the current situation on the peninsula, China should focus on deepening cooperation between China and the United States on the Korean nuclear issue, institutionalize the development of inter-Korean relations, and enhance its capability to resolve the Korean nuclear issue peacefully.
文摘The XXIII Olympic Winter Games in South Korea lit a flame for the dramatic development of inter-Korean relations.Rapid changes in the geopolitical situation on the peninsula since the Winter Olympics in Pyeongchang have included high-level DPRK talks with South Korea,China and the United States.President Xi Jinping’s meetings with DPRK leader Kim Jong-un in Beijing and Dalian,and the upcoming Trump-Kim summit on June 12 are all about timing.A new diplomacy on DPRK’s part has unfolded out of the external pressure the DPRK experienced from the US,China and the international community but also out of the difficulties the DPRK faces in advancing its nuclear options.Unless the DPRK makes substantial concessions,the US will not alter policy.Real success means historic change,not only a reunion of families and an official end to the Korean War,but also a potential shift in the Asian power structure.There are diverse possibilities and much at stake.The fundamental way forward is restarting Six Party Talks and regional mechanism.
文摘Petrological,chronological and geotectonic geological analysis of Precambrian metamorphic rock in Korean Peninsula shows that the remnants(>3.4 Ga) of continental nuclei crust were formed in the Paleoarchean in the Rangrim Massif.In the massif,the main formation ages of continental crust range from 3.2 Ga to 2.5 Ga,its important growing period was 2.8-2.5 Ga.The subsequent expansion period of the Rangrim Massif was 2.4-2.2 Ga.The division events occurred in 1.85 Ga and in the Late Paleoproterozoic--Early Mesopro-terozoic,respectively.Since then the massif was relatively stable.However,the last division of the Rangrim Massif occurred at 793 Ma.
基金grants from the Korea National Arboretum(Grant no.KNA1-1-13,14-1)Gachon University(Grant no.2018-0320)to J-H Kim。
文摘Endemic plants are important for understanding phylogenetic relationships,biogeographical history,and genetic variation because of their restricted distribution and their role in conserving biodiversity.Here,we investigated the phylogenetic relationships of the Korean endemic Fraxinus chiisanensis by reconstructing the molecular phylogeny of Fraxinus based on two nuclear DNA(nrITS and phantastica)and two chloroplast DNA(psbA-trnH and rp132-trnL)regions.Within our fossil-calibrated phylogenetic framework,we also inferred the biogeographical history of F.chiisanensis.To provide a scientific basis for the conservation of F.chiisanensis,we determined the levels of genetic diversity and genetic differentiation in this species.Combining information from nuclear and chloroplast DNA sequence data,our molecular phylogenetic analyses identified F.chiisanensis as a genetically distinct unit from its sister group,Fraxinus platypoda from Japan.Our molecular dating analyses using nuclear and chloroplast DNA data sets show F.chiisanensis diverged from its sister F.platypoda in the Early or Middle Miocene and differentiated in the Late Miocene on the Korean Peninsula.Our results suggest that the divergence of F.chiisanensis was associated with the submergence of the East China Sea land bridge and enhanced monsoons in East Asia.When compared to F.platypoda,F.chiisanensis exhibits low genetic diversity within populations and high genetic differentiation among populations.These results help us to understand the evolutionary history of F.chiisanensis and to develop a conservation strategy for this species.
