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Search Results: 1 - 10 of 44427 matches for " Baek-Jo Kim "
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Teleconnections: Summer Monsoon over Korea and India
Teleconnections:Summer Monsoon over Korea and India

Baek-Jo Kim,Sung-Euii Moon,Lu Riyu,R H Kripalani,
Baek-Jo Kim
,Sung-Euii Moon,Lu Riyu,R. H. Kripalani

大气科学进展 , 2002,
Abstract: This study investigates the relationship between the summer monsoon rainfall over Korea and India, by using correlation analysis and Singular Value Decomposition (SVD). Results reveal that summer monsoon rainfall over Korea is negatively (significant at the 99% level) correlated with the rainfall over the northwest and central parts of India. In addition, coupled spatial modes between the rainfall over Korea and India have been identified by the SVD analysis. The squared covariance fraction explained by the first mode is 70% and the correlation coefficient between the time coefficients of the two fields is significant at the 99% level, indicating that the coupled mode reflects a large part of the interaction between the summer monsoon rainfall over Korea and India. The first mode clearly demonstrates the existence of a significant negative correlation between the rainfall over the northwest and central parts of India and the rainfall over Korea. Possible mechanisms of this correlation are investigated by analyzing the variation of upper-level atmospheric circulation associated with the Tibetan high using NCEP/NCAR Reanalysis data.
Associations with the Interannual Variations of Onset and Withdrawal of the Changma
伴随韩国雨季开始和结束早晚的关联场分析

Lu Riyu,Huang Ronghui,Hee-Jeong Baek,Jai-Ho Oh,Baek-Jo Kim,
Lu Riyu
,Huang Ronghui,Hee-Jeong Baek,Jai-Ho Oh,Baek-Jo Kim

大气科学进展 , 2001,
Abstract: The associations of onset and withdrawal of the rainy season in South Korea (called Changma) have been examined. Composite studies showed that there are significant differences in circulations between extremely early and late onset (or withdrawals) not only over East Asia, but also over remote areas. The in situ significant differences include the upper-level jet over East Asia and the subtropical anticyclone over the western North Pacific at lower levels. The significant remote associations include the Indian monsoon and ENSO. The Indian summer monsoon is related to both onset and withdrawal of the Changma, while ENSO has a significant relation only to onset, but not to withdrawal.
Cluster Analysis of Tropical Cyclones Making Landfall on the Korean Peninsula

Ki-Seon CHOI,Baek-Jo KIM,Chee-Young CHOI,Jae-Cheol NAM,

大气科学进展 , 2009,
Abstract: Cluster analysis has been performed on the tracks of 51 Tropical Cyclones (TCs) that made landfall on the Korean Peninsula (KP) for the period of 1951--2004. The classification technique of the landfalling tracks used in this study was the fuzzy clustering method (FCM) and the resultant silhouette coefficient suggested four clusters as an optimal cluster number. Most TCs of Cluster 2 and Cluster 3 (C-23) tended to pass through mainland China before landfall, but those of Cluster 1 and Cluster 4 (C-14) tended to mostly land after moving northward from the East China Sea (ECS) without passing over mainland China. The TC landfalling frequency of C-14 has begun to clearly increase since the late 1980s, particularly the maximum landfalling frequency in the early 2000s set a record for the 54-year analysis period. The ridge axis of the western North Pacific high (WNPH) of C-23 bends more equatorward than that of C-14, so that the monsoon trough of C-23 is located more equatorward than that of C-14. As a consequence, most TCs of C-23 tend to recurve inland of China, but over the ECS for C-14.
The EPHX1 rs1051740 Polymorphism Is Associated with Childhood Acute Lymphoblastic Leukemia in a Korean Population  [PDF]
Hee Nam Kim, Nan Young Kim, Li Yu, Il-Kwon Lee, Min-Ho Shin, Hee Jo Baek, Hoon Kook, Hyeoung-Joon Kim
Advances in Bioscience and Biotechnology (ABB) , 2014, DOI: 10.4236/abb.2014.57080
Abstract:

Microsomal epoxide hydrolase (EPHX1) is involved in the activation and detoxification of exogenous chemicals. Genetic polymorphisms in EPHX1 have been associated with the development of leukemia. To investigate an association between single-nucleotide polymorphisms (SNPs) of EPHX1 and risk factors for childhood acute lymphoblastic leukemia (ALL) in Korean children, we genotyped two SNPs, Tyr113His (rs1051740) and His139Arg (rs2234922) in 185 childhood ALL cases and 536 healthy controls. Genotyping for these two SNPs was performed by simplex pyrosequencing assay and high-resolution melt analysis, respectively. We found that the Tyr113His genotype was associated with a decreased risk of childhood ALL (odds ratio, OR = 0.64, 95% confidence interval, CI = 0.43 - 0.93; p = 0.02). There was no association between His139Arg and the combined genotypes and the risk of childhood ALL. These results suggest that the EPHX1 113TyrHis genotype may protect against leukemogenesis in childhood.

Cluster-size heterogeneity in the two-dimensional Ising model
Woo Seong Jo,Su Do Yi,Seung Ki Baek,Beom Jun Kim
Physics , 2012, DOI: 10.1103/PhysRevE.86.032103
Abstract: We numerically investigate the heterogeneity in cluster sizes in the two-dimensional Ising model and verify its scaling form recently proposed in the context of percolation problems [Phys. Rev. E 84, 010101(R) (2011)]. The scaling exponents obtained via the finite-size scaling analysis are shown to be consistent with theoretical values of the fractal dimension $d_f$ and the Fisher exponent $\tau$ for the cluster distribution. We also point out that strong finite-size effects exist due to the geometric nature of the cluster-size heterogeneity.
Evolution of popularity in given names
Mi Jin Lee,Woo Seong Jo,Il Gu Yi,Seung Ki Baek,Beom Jun Kim
Physics , 2015, DOI: 10.1016/j.physa.2015.09.076
Abstract: An individual's identity in a human society is specified by his or her name. Differently from family names, usually inherited from fathers, a given name for a child is often chosen at the parents' disposal. However, their decision cannot be made in a vacuum but affected by social conventions and trends. Furthermore, such social pressure changes in time, as new names gain popularity while some other names are gradually forgotten. In this paper, we investigate how popularity of given names has evolved over the last century by using datasets collected in Korea, the province of Quebec in Canada, and the United States. In each of these countries, the average popularity of given names exhibits typical patterns of rise and fall with a time scale of about one generation. We also observe that notable changes of diversity in given names signal major social changes.
High-Throughput Sequencing and De Novo Assembly of Brassica oleracea var. Capitata L. for Transcriptome Analysis
Hyun A. Kim, Chan Ju Lim, Sangmi Kim, Jun Kyoung Choe, Sung-Hwan Jo, Namkwon Baek, Suk-Yoon Kwon
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0092087
Abstract: Background The cabbage, Brassica oleracea var. capitata L., has a distinguishable phenotype within the genus Brassica. Despite the economic and genetic importance of cabbage, there is little genomic data for cabbage, and most studies of Brassica are focused on other species or other B. oleracea subspecies. The lack of genomic data for cabbage, a non-model organism, hinders research on its molecular biology. Hence, the construction of reliable transcriptomic data based on high-throughput sequencing technologies is needed to enhance our understanding of cabbage and provide genomic information for future work. Methodology/Principal Findings We constructed cDNAs from total RNA isolated from the roots, leaves, flowers, seedlings, and calcium-limited seedling tissues of two cabbage genotypes: 102043 and 107140. We sequenced a total of six different samples using the Illumina HiSeq platform, producing 40.5 Gbp of sequence data comprising 401,454,986 short reads. We assembled 205,046 transcripts (≥ 200 bp) using the Velvet and Oases assembler and predicted 53,562 loci from the transcripts. We annotated 35,274 of the loci with 55,916 plant peptides in the Phytozome database. The average length of the annotated loci was 1,419 bp. We confirmed the reliability of the sequencing assembly using reverse-transcriptase PCR to identify tissue-specific gene candidates among the annotated loci. Conclusion Our study provides valuable transcriptome sequence data for B. oleracea var. capitata L., offering a new resource for studying B. oleracea and closely related species. Our transcriptomic sequences will enhance the quality of gene annotation and functional analysis of the cabbage genome and serve as a material basis for future genomic research on cabbage. The sequencing data from this study can be used to develop molecular markers and to identify the extreme differences among the phenotypes of different species in the genus Brassica.
Dynamics of a Predator-Prey System Concerning Biological and Chemical Controls
Kim HyeKyung,Baek Hunki
Journal of Inequalities and Applications , 2010,
Abstract: We investigate an impulsive predator-prey system with Monod-Haldane type functional response and control strategies, especially, biological and chemical controls. Conditions for the stability of the prey-free positive periodic solution and for the permanence of the system are established via the Floquet theory and comparison theorem. Numerical examples are also illustrated to substantiate mathematical results and to show that the system could give birth to various kinds of dynamical behaviors including periodic doubling, and chaotic attractor. Finally, in discussion section, we consider the dynamic behaviors of the system when the growth rate of the prey varies according to seasonal effects.
Edge states of integral quantum Hall states versus edge states of antiferromagnetic quantum spin chains
Yong Baek Kim
Physics , 1996, DOI: 10.1103/PhysRevB.53.16420
Abstract: Using the network model representation, it is shown that the edge states of finite-size integral quantum Hall liquid can be regarded as the edge states of an SU$(2N)$ open antiferromagnetic quantum spin chain in the $N \rightarrow 0$ limit. The structures of edge states in both cases of integer quantum Hall liquid and an SU$(2N)$ antiferromagnetic quantum spin chain are compared and the relations between them are pointed out. This correspondence is used to give qualitative arguments in favor of the recent results on two-dimensional electron systems coupled in layers with a large perpendicular magnetic field. In particular, it is shown that the absence of the localization in the two-dimensional chiral surface state of the integral quantum Hall liquid in the case of the finite-size coupled system can be explained by the absence of the gap in the excitation spectrum of an SU$(2N)$ ferromagnetic quantum spin chain in the $N \rightarrow 0$ limit.
Composite fermions as solitons in the half-filled Landau level
Yong Baek Kim
Physics , 1996,
Abstract: Hold temporarily. Revised version in progress
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