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PRICING SYMMETRIC TYPE OF POWER QUANTO OPTIONS
Lee, Jaesung,Lee, Youngrok Korean Mathematical Society 2019 대한수학회보 Vol.56 No.2
We derive full closed-form expressions for the prices of European symmetric power quanto call options with four different forms of terminal payoffs under the assumption of the classical lognormal asset price and exchange rate model.
Lee, Jung Seok,Kim, Jaesung,Im, Se Pyeong,Kim, Si Won,Jung, Jae Wook,Lazarte, Jassy Mary S.,Lee, Jeong-Ho,Thompson, Kim D.,Jung, Tae Sung Elsevier 2018 Journal of immunological methods Vol.462 No.-
<P><B>Abstract</B></P> <P>Monomeric variable lymphocyte receptor B (VLRB) is one of the smallest binding scaffold (20–25 kDa) from jawless vertebrates, hagfish and lamprey. This relatively new class of binding scaffold has various advantages: i) it has a single peptide composition, amenable to molecular engineering for enhancing its stability and affinity; ii) it has a small size, contributing better tissue penetration and easier production using microorganism expression system. Monomeric arVLRB142, which can specifically bind to the glycoprotein of viral hemorrhagic septicemia virus (VHSV), was expressed in <I>Pichia pastoris</I>. High quantity recombinant monomeric arVLRB142 (rVLR142<SUP>mono</SUP>) was purified from 100 ml of culture with a resulting yield of 2.6 ±1.3 mg of target protein. Functional studies revealed that the purified rVLR142<SUP>mono</SUP> can specifically recognize low levels of the target antigen (recombinant glycoprotein) (i.e. as low as 0.1 nM), but also the native glycoprotein of VHSV. The expressed rVLR142<SUP>mono</SUP> exhibited high levels of stability and it retained it binding capacity over broad temperature (4 °C ~ 60 °C) and pH ranges (pH 1.5–12.5). We developed an effective expression system for mass production of monomeric VLRB based on <I>P. pastoris</I>. The recombinant protein that was obtained offers promising binding avidity and biophysical stability and its potential use in various biotechnological applications.</P>
Memetic feature selection for multilabel text categorization using label frequency difference
Lee, Jaesung,Yu, Injun,Park, Jaegyun,Kim, Dae-Won Elsevier 2019 Information sciences Vol.485 No.-
<P><B>Abstract</B></P> <P>Multilabel text categorization is an important task in modern text mining applications. Text datasets comprise an excessive number of terms, and this can degrade the accuracy. Therefore, conventional studies applied a feature selection method before text categorization. Recently, memetic feature selection methods that hybridize an evolutionary feature wrapper and a filter have gained popularity and showed promising results. However, conventional memetic text feature selection methods suffer from limited performance because the used feature filter requires problem transformation that degrades the search capability, resulting in unrefined feature subsets with poor accuracy. In this study, we propose an effective memetic feature selection method based on a novel feature filter that is highly specialized to multilabel text categorization. Our experiments demonstrate that the proposed method significantly outperforms several conventional methods.</P>
Evolutionary Multilabel Feature Selection Using Promising Feature Subset Generation
Lee, Jaesung,Seo, Wangduk,Han, Ho,Kim, Dae-Won Hindawi Limited 2018 Journal of sensors Vol.2018 No.-
<P>Recent progress in the development of sensor devices improves information harvesting and allows complex but intelligent applications based on learning hidden relations between collected sensor data and objectives. In this scenario, multilabel feature selection can play an important role in achieving better learning accuracy when constrained with limited resources. However, existing multilabel feature selection methods are search-ineffective because generated feature subsets frequently include unimportant features. In addition, only a few feature subsets compared to the search space are considered, yielding feature subsets with low multilabel learning accuracy. In this study, we propose an effective multilabel feature selection method based on a novel feature subset generation procedure. Experimental results demonstrate that the proposed method can identify better feature subsets than conventional methods.</P>
THE PRICING OF QUANTO OPTIONS UNDER THE VASICEK'S SHORT RATE MODEL
Lee, Jaesung,Lee, Youngrok Korean Mathematical Society 2016 대한수학회논문집 Vol.31 No.2
We derive a closed-form expression for the price of a European quanto call option when both foreign and domestic interest rates follow the Vasicek's short rate model.
Salicylic acid-mediated innate immunity in Arabidopsis is regulated by SIZ1 SUMO E3 ligase
Lee, Jiyoung,Nam, Jaesung,Park, Hyeong Cheol,Na, Gunnam,Miura, Kenji,Jin, Jing Bo,Yoo, Chan Yul,Baek, Dongwon,Kim, Doh Hoon,Jeong, Jae Cheol,Kim, Donggiun,Lee, Sang Yeol,Salt, David E.,Mengiste, Tesfa Blackwell Publishing Ltd 2007 The Plant journal Vol.49 No.1
<P>Summary</P><P>Reversible modifications of target proteins by small ubiquitin-like modifier (SUMO) proteins are involved in many cellular processes in yeast and animals. Yet little is known about the function of sumoylation in plants. Here, we show that the <I>SIZ1</I> gene, which encodes an Arabidopsis SUMO E3 ligase, regulates innate immunity. Mutant <I>siz1</I> plants exhibit constitutive systemic-acquired resistance (SAR) characterized by elevated accumulation of salicylic acid (SA), increased expression of pathogenesis-related (<I>PR</I>) genes, and increased resistance to the bacterial pathogen <I>Pseudomonas syringae</I> pv. <I>tomato</I> (<I>Pst</I>) DC3000. Transfer of the <I>NahG</I> gene to <I>siz1</I> plants results in reversal of these phenotypes back to wild-type. Analyses of the double mutants, <I>npr1 siz1</I>, <I>pad4 siz1</I> and <I>ndr1 siz1</I> revealed that <I>SIZ1</I> controls SA signalling. <I>SIZ1</I> interacts epistatically with <I>PAD4</I> to regulate PR expression and disease resistance. Consistent with these observations, <I>siz1</I> plants exhibited enhanced resistance to <I>Pst</I> DC3000 expressing <I>avrRps4</I>, a bacterial avirulence determinant that responds to the <I>EDS1/PAD4</I>-dependent TIR-NBS-type <I>R</I> gene. In contrast, <I>siz1</I> plants were not resistant to <I>Pst</I> DC3000 expressing <I>avrRpm1</I>, a bacterial avirulence determinant that responds to the NDR1-dependent CC-NBS-type <I>R</I> gene. Jasmonic acid (JA)-induced <I>PDF1.2</I> expression and susceptibility to <I>Botrytis cinerea</I> were unaltered in <I>siz1</I> plants. Taken together, these results demonstrate that SIZ1 is required for SA and PAD4-mediated <I>R</I> gene signalling, which in turn confers innate immunity in Arabidopsis.</P>
On-Chip Bus Serialization Method for Low-Power Communications
Jaesung Lee 한국전자통신연구원 2010 ETRI Journal Vol.32 No.4
One of the critical issues in on-chip serial communications is increased power consumption. In general, serial communications tend to dissipate more energy than parallel communications due to bit multiplexing. This paper proposes a low-power bus serialization method. This encodes bus signals prior to serialization so that they are converted into signals that do not greatly increase in transition frequency when serialized. It significantly reduces the frequency by making the best use of word-to-word and bit-by-bit correlations presented in original parallel signals. The method is applied to the revision of an MPEG-4 processor, and the simulation results show that the proposed method surpasses the existing one. In addition, it is cost-effective when implemented as a hardware circuit since its algorithm is very simple.
Jaesung Choi,Jee-Hye Choi,Ho Woon Lee,Dongbeom Seo,Gavaachimed Lkhagvasuren,Jung-Woong Kim,Sang-Beom Seo,Kangseok Lee,Kwang-Ho Lee 생화학분자생물학회 2023 BMB Reports Vol.56 No.2
Karyopherin-α3 (KPNA3), a karyopherin- α isoform, is intimatelyassociated with metastatic progression via epithelial-mesenchymaltransition (EMT). However, the molecular mechanismunderlying how KPNA3 acts as an EMT inducer remains to beelucidated. In this report, we identified that KPNA3 was significantlyupregulated in cancer cells, particularly in triple-negativebreast cancer, and its knockdown resulted in the suppressionof cell proliferation and metastasis. The comprehensivetranscriptome analysis from KPNA3 knockdown cells indicatedthat KPNA3 is involved in the regulation of numerous EMTrelatedgenes, including the downregulation of GATA3 andE-cadherin and the up-regulation of HAS2. Moreover, it wasfound that KPNA3 EMT-mediated metastasis can be achievedby TGF-β or AKT signaling pathways; this suggests that thenovel independent signaling pathways KPNA3-TGF-β-GATA3-HAS2/E-cadherin and KPNA3-AKT-HAS2/E-cadherin are involvedin the EMT-mediated progress of TNBC MDA-MB-231 cells. These findings provide new insights into the divergent EMTinducibility of KPNA3 according to cell and cancer type.
Graphene–nanowire hybrid structures for high-performance photoconductive devices
Lee, Hyungwoo,Heo, Kwang,Park, Jaesung,Park, Yongju,Noh, Seunguk,Kim, Kwang S.,Lee, Changhee,Hong, Byung Hee,Jian, Jikang,Hong, Seunghun The Royal Society of Chemistry 2012 Journal of materials chemistry Vol.22 No.17
<P>Graphene–CdS nanowire (NW) hybrid structures with high-speed photoconductivity were developed. The hybrid structure was comprised of CdS NWs which were selectively grown in specific regions on a single-layer graphene sheet. The photoconductive channels based on graphene–CdS NW hybrid structures exhibited much larger photocurrents than graphene-based channels and much faster recovery speed than CdS NW network-based ones. Our graphene–CdS NW structures can be useful because they were much faster than commercial CdS film-based photodetectors and had photocurrents large enough for practical applications.</P> <P>Graphic Abstract</P><P>We have developed a photoconductive channel based on graphene–CdS nanowire hybrid structures which exhibited large photocurrent and fast recovery speed. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2jm16565a'> </P>