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김용석,도경훈 東西大學校 1997 동서논문집 Vol.3 No.1
In this paper, a genetic algorithm-based optimization technique for stereo matching is proposed. Stereo matching is the essential process to recover three-dimensional structure of objects. The geometrical difference of left and right images called as disparity is constructed as two-dimensional chromosomes with fitness values inversely proportional to their costs. The cost function is composed of the intensity-difference between two images and smoothness of disparity. The crossover and mutation operators in the two-dimensional chromosomes is described. The operations are affected by the disparities of neighbor pixels. The knowledge-augmented operators is shown to result in rapid convergence and stable result. The genetic algorithm for stereo matching is tested on synthetic and natural images. Experimental results for various images show that the proposed algorithm has good performance even if the image has the unfavorable conditions.
Jung, Ki-Hye,Park, Ji-Ae,Kim, Jung Young,Kim, Mi Hyun,Oh, Seyoung,Kim, Hee-Kyung,Choi, Eun-Ji,Kim, Han-Jun,Do, Sun Hee,Lee, Kyo Chul,Kim, Kyeong Min,Lee, Yong Jin,Chang, Yongmin Hindawi 2018 Contrast media and molecular imaging Vol.2018 No.-
<P>Gadolinium-neutron capture therapy (Gd-NCT) is based on the nuclear capture reaction that occurs when <SUP>157</SUP>Gd is irradiated with low energy thermal neutrons to primarily produce gamma photons. Herein, we investigated the effect of neutron capture therapy (NCT) using a small molecular gadolinium complex, Gd-DO3A-benzothiazole (Gd-DO3A-BTA), which could be a good candidate for use as an NCT drug due to its ability to enter the intracellular nuclei of tumor cells. Furthermore, MRI images of Gd-DO3A-BTA showed a clear signal enhancement in the tumor, and the images also played a key role in planning NCT by providing accurate information on the <I>in vivo</I> uptake time and duration of Gd-DO3A-BTA. We injected Gd-DO3A-BTA into MDA-MB-231 breast tumor-bearing mice and irradiated the tumors with cyclotron neutrons at the maximum accumulation time (postinjection 6 h); then, we observed the size of the growing tumor for 60 days. Gd-DO3A-BTA showed good therapeutic effects of chemo-Gd-NCT for the <I>in vivo</I> tumor models. Simultaneously, the Gd-DO3A-BTA groups ([Gd-DO3A-BTA(+), NCT(+)]) showed a significant reduction in tumor size (<I>p</I> < 0.05), and the inhibitory effect on tumor growth was exhibited in the following order: [Gd-DO3A-BTA(+), NCT(+)] > [Gd-DO3A-BTA(+), NCT(−)] > [Gd-DO3A-BTA(−), NCT(+)] > [Gd-DO3A-BTA(−), NCT(−)]. On day 60, the [Gd-DO3A-BTA(+), NCT(+)] and [Gd-DO3A-BTA(−), NCT(−)] groups exhibited an approximately 4.5-fold difference in tumor size. Immunohistochemistry studies demonstrated that new combinational therapy with chemo-Gd-NCT could treat breast cancer by both the inhibition of tumor cell proliferation and induction of apoptosis-related proteins, with <I>in vivo</I> tumor monitoring by MRI.</P>
Development of Prediction Equation of Diffusing Capacity of Lung for Koreans
Hwang, Yong Il,Park, Yong Bum,Yoon, Hyoung Kyu,Lim, Seong Yong,Kim, Tae-Hyung,Park, Joo Hun,Lee, Won-Yeon,Park, Seong Ju,Lee, Sei Won,Kim, Woo Jin,Kim, Ki Uk,Shin, Kyeong Cheol,Kim, Do Jin,Kim, Hui Ju The Korean Academy of Tuberculosis and Respiratory 2018 Tuberculosis and Respiratory Diseases Vol.81 No.1
Background: The diffusing capacity of the lung is influenced by multiple factors such as age, sex, height, weight, ethnicity and smoking status. Although a prediction equation for the diffusing capacity of Korea was proposed in the mid-1980s, this equation is not used currently. The aim of this study was to develop a new prediction equation for the diffusing capacity for Koreans. Methods: Using the data of the Korean National Health and Nutrition Examination Survey, a total of 140 nonsmokers with normal chest X-rays were enrolled in this study. Results: Using linear regression analysis, a new predicting equation for diffusing capacity was developed. For men, the following new equations were developed: carbon monoxide diffusing capacity (DLco)=-10.4433-0.1434${\times}$age (year)+0.2482${\times}$heights (cm); DLco/alveolar volume (VA)=6.01507-0.02374${\times}$age (year)-0.00233${\times}$heights (cm). For women the prediction equations were described as followed: DLco=-12.8895-0.0532${\times}$age (year)+0.2145${\times}$heights (cm) and DLco/VA=7.69516-0.02219${\times}$age (year)-0.01377${\times}$heights (cm). All equations were internally validated by k-fold cross validation method. Conclusion: In this study, we developed new prediction equations for the diffusing capacity of the lungs of Koreans. A further study is needed to validate the new predicting equation for diffusing capacity.
( Yong Hyun Jang ),( Sun Young Moon ),( Hyun Bo Sim ),( Sang Lim Kim ),( Weon Ju Lee ),( Seok Jong Lee ),( Jin Kyeong Choi ),( Sang Hyun Kim ),( Do Won Kim ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.2
Background: The function of innate receptors has recently been extended to include epithelial barrier regulation. Toll like receptor(TLR)2 activation was shown to aid tight junction (TJ) repair in atopic dermatitis. However, the role of other TLRs in modulating epidermal barrier invitro and in vivo remains poorly understood. Objectives: We investigated the changes of TJ proteins following the activation of TLR 1 and 6 by house dust mite (HDM). Methods: Firstly, the mRNA levels of toll like receptors and TJ elements were assayed using real-time RCR in epidermal keratinocytes and a murine model with AD-likelesions activated by HDM allergen, Dermatophagoides farinae extracts (DFE). Additionally, the association between specific TLR activation and the changes of certain TJ proteins was studied in TLR deficient mice. Results: Both in vitro and in vivo, DFE activated TLR 1 and TLR 6. In addition, DFE upregulated gene expression of TJ proteins including claudin-1, claudin-23 and occludin. These results provide the evidence that HDM triggers the activation of PRRs such as TLR 1 and TLR 6 and thus stimulates the modulation of TJ proteins. Moreover, gene expression of claudin-1, claudin-23 and occludin was not increased in TLR1 (tlr1-/-) and TLR6 (tlr6-/-) knockout mice. Conclusion: Our data suggest that the innate immune activation of the keratinocytes by HDM allergens contribute to lead the preservation of TJ integrity.
( Kyeong-seong Cheon ),( Jeongho Baek ),( Young-il Cho ),( Young-min Jeong ),( Youn-young Lee ),( Jun Oh ),( Yong Jae Won ),( Do-yu Kang ),( Hyoja Oh ),( Song Lim Kim ),( Inchan Choi ),( In Sun Yoon ) 한국육종학회 2018 Plant Breeding and Biotechnology Vol.6 No.4
Genome resequencing by next-generation sequencing technology can reveal numerous single nucleotide polymorphisms (SNPs) within a closely-related cultivar group, which would enable the development of sufficient SNP markers for mapping and the identification of useful genes present in the cultivar group. We analyzed genome sequence data from 13 Korean japonica rice varieties and discovered 740,566 SNPs. The SNPs were distributed at 100-kbp intervals throughout the rice genome, although the SNP density was uneven among the chromosomes. Of the 740,566 SNPs, 1,014 SNP sites were selected on the basis of polymorphism information content (PIC) value higher than 0.4 per 200-kbp interval, and 506 of these SNPs were converted to Kompetitive Allele-Specific PCR (KASP) markers. The 506 KASP markers were tested for genotyping with the 13 sequenced Korean japonica rice varieties, and polymorphisms were detected in 400 KASP markers (79.1%) which would be suitable for genetic analysis and molecular breeding. Additionally, a genetic map comprising 205 KASP markers was successfully constructed with 188 F2 progenies derived from a cross between the varieties, Junam and Nampyeong. In a phylogenetic analysis with 81 KASP markers, 13 Korean japonica varieties showed close genetic relationships and were divided into three groups. More KASP markers are being developed and these markers will be utilized in gene mapping, quantitative trait locus (QTL) analysis, marker-assisted selection and other strategies relevant to crop improvement.
( Yong Hyun Jang ),( Soo Yuhl Chae ),( Hyun Bo Sim ),( Weon Ju Lee ),( Seok Jong Lee ),( Jung Min Kim ),( Jin Kyeong Choi ),( Sang Hyun Kim ),( Do Won Kim ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2
Background: House dust mite (HDM) allergens are important in the development of atopic dermatitis (AD). In airway allergy, HDM activate innate immunity. However, information regarding the activation of innate immunity by HDM in the skin is limited. Objectives: We investigated whether HDM activate innate immune system in a murine model with atopic dermatitis-like lesions. Activation of innate immunity by HDM allergens in epidermal keratinocytes was also evaluated. Methods: The mRNA levels of pattern recognition receptors (PRRs), antimicrobial peptides (AMPs) and epidermal immunologic/physical barrier elements were assayed using real-time PCR and were compared between control and HDM group both in vivo and in vitro. Results: In mouse skin, the mRNA levels of PRRs (TLR1/2/4/6/9, NOD2 and PGLYRP1/2/3) were significantly increased in the HDM group compared to the control group. AMPs such as β-defensin1/2, LL-37, S100A7/8/9 and REG3 α showed also similar tendency. A significant increase of mRNA levels of immunologic barrier components such as TSLP, IL-25/33, PAR-2, kallikrein5 and physical barrier proteins including claudin-1/23 and occludin were detected. In addition, TLR1/6/9, NOD2, IL-25/33, claudin-1/23 and occludin mRNA increased in HaCaT cells stimulated with HDM. Conclusion: Our findings provide the evidence that HDM allergens may promote AD development and aggravation through activation of innate immune system as well as an exacerbated Th2-biased adaptive immune response.
Texture Modification by Addition of Ca in Mg–Zn–Y Alloy
Kyeong, Joon Seok,Kim, Jeong Kyun,Lee, Myung Jae,Park, Yong Bum,Kim, Won Tae,Kim, Do Hyang The Japan Institute of Metals 2012 Materials transactions Vol.53 No.5
<P>The secondary solidification phase of icosahedral (I-) phase in rolled Mg–Zn–Y alloy is replaced with I + Ca<SUB>2</SUB>Mg<SUB>6</SUB>Zn<SUB>3</SUB> phases by addition of Ca. Addition of Ca in Mg–Zn–Y alloy significantly accelerates dynamic and static recrystallization resulting in much fine grain size and more random texture. EBSD analysis indicates that the presence of Ca in the α-Mg solid solution matrix may play a role in weakening of basal texture rather than particle stimulation nucleation effect by the second solidification phases.</P>