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딥러닝 기반 miRNA-mRNA 연관성 예측 모델 연구
윤혜원(Hyewon Yoon),윤승원(Seungwon Yoon),조재은(Jaeeun Cho),이규철(Kyuchul Lee) 대한전자공학회 2024 대한전자공학회 학술대회 Vol.2024 No.6
miRNA is a small RNA of 22 nucleotides (nt) in length that interacts with mRNA to regulate biological processes. This paper establishes a deep learning-based miRNA-mRNA association prediction model to overcome the time and cost issues of direct experiments. Using an open dataset, a dataset was constructed, and negative data was generated through data vectorization and similarity distance-based filtering. Predicting associations with an LSTM-based deep learning model achieved an ROC value of 0.97. The proposed method is applicable not only to miRNA and mRNA associations but also to various biological data, and future research will involve additional experiments with various deep learning models.
Study on Embryo Transfer System for Production of Transgenic Pigs
Seungwon Na,Euncheol Lee,Ghangyong Kim,Kyuhong Min,Youngkwang Yu,Pantu Kumar Roy,Xun Fang,Bahia Mohamed Salih Hassan,Kiyoung Yoon,Sangtae Shin,Jongki Cho 한국수정란이식학회 2015 한국동물생명공학회지 Vol.30 No.4
In the last 10 years, porcine somatic cell nuclear transfer to generate transgenic pig has been performed tremendous development with introduction and knockout of many genes. However, efficiency of porcine somatic cell nuclear transfer is still low and embryo transfer (ET) is one of important step for production efficiency. In porcine ET for production of transgenic cloned pig, we can consider many of points to increase production rates. In respect of seasonality and weather, porcine ET usually is not performed in summer and winter. Cloned transgenic embryos must be transferred into reproductive tracts of recipients where embryos are located after natural fertilization with similar estrous cycle. If cloned embryos with 2∼4 cell stage are transferred, they must be transferred into oviducts in periovulatory stage. Number and deposition sites of transferred cloned embryos are important. And we must compare the methods of ET between surgical and non-surgical ones in respect of production efficiency. Sow recipients after natural estrus is most preferred recipients however its cost is must be considered. Here we will review many of current studies about porcine embryo transfer to increase production efficiency of transgenic pigs and strategies for further studies.
Study on Embryo Transfer System for Production of Transgenic Pigs
Seungwon Na,Euncheol Lee,Ghangyong Kim,Kyuhong Min,Youngkwang Yu,Pantu Kumar Roy,Xun Fang,Bahia Mohamed Salih Hassan,Kiyoung Yoon,Sangtae Shin,조종기 사단법인 한국동물생명공학회 2015 한국동물생명공학회지 Vol.30 No.4
In the last 10 years, porcine somatic cell nuclear transfer to generate transgenic pig has been performed tremendous development with introduction and knockout of many genes. However, efficiency of porcine somatic cell nuclear transfer is still low and embryo transfer (ET) is one of important step for production efficiency. In porcine ET for production of transgenic cloned pig, we can consider many of points to increase production rates. In respect of seasonality and weather, porcine ET usually is not performed in summer and winter. Cloned transgenic embryos must be transferred into reproductive tracts of recipients where embryos are located after natural fertilization with similar estrous cycle. If cloned embryos with 2∼4 cell stage are transferred, they must be transferred into oviducts in periovulatory stage. Number and deposition sites of transferred cloned embryos are important. And we must compare the methods of ET between surgical and non-surgical ones in respect of production efficiency. Sow recipients after natural estrus is most preferred recipients however its cost is must be considered. Here we will review many of current studies about porcine embryo transfer to increase production efficiency of transgenic pigs and strategies for further studies.
Flow Wars: Systemizing the Attack Surface and Defenses in Software-Defined Networks
Yoon, Changhoon,Lee, Seungsoo,Kang, Heedo,Park, Taejune,Shin, Seungwon,Yegneswaran, Vinod,Porras, Phillip,Gu, Guofei Institute of Electrical and Electronics Engineers, 2017 IEEE/ACM transactions on networking Vol.25 No.6
<P>Emerging software defined network (SDN) stacks have introduced an entirely new attack surface that is exploitable from a wide range of launch points. Through an analysis of the various attack strategies reported in prior work, and through our own efforts to enumerate new and variant attack strategies, we have gained two insights. First, we observe that different SDN controller implementations, developed independently by different groups, seem to manifest common sets of pitfalls and design weakness that enable the extensive set of attacks compiled in this paper. Second, through a principled exploration of the underlying design and implementation weaknesses that enables these attacks, we introduce a taxonomy to offer insight into the common pitfalls that enable SDN stacks to be broken or destabilized when fielded within hostile computing environments. This paper first captures our understanding of the SDN attack surface through a comprehensive survey of existing SDN attack studies, which we extend by enumerating 12 new vectors for SDN abuse. We then organize these vulnerabilities within the well-known confidentiality, integrity, and availability model, assess the severity of these attacks by replicating them in a physical SDN testbed, and evaluate them against three popular SDN controllers. We also evaluate the impact of these attacks against published SDN defense solutions. Finally, we abstract our findings to offer the research and development communities with a deeper understanding of the common design and implementation pitfalls that are enabling the abuse of SDN networks.</P>
Jung, Seungwon,Kim, Bong Kyun,Lee, Sangjoon,Yoon, Seungmin,Im, Heh-In,Kim, Sang Kyung Elsevier 2018 Sensors and actuators. B Chemical Vol.262 No.-
<P><B>Abstract</B></P> <P>Since microRNAs (miRNAs) have been considered as regulators of messenger RNA (mRNA) translation, the development of the simple, multiplex, and quantitatively precise miRNA profiling techniques becomes more significant. Here, an on-chip multiplex real-time quantitative polymerase chain reaction (qPCR) for miRNA profiling is demonstrated with a primer-immobilized network (PIN) array, which consists of hundreds of hydrogel spots. The array renders highly dense reaction cells of 20 × 20 in 1 cm<SUP>2</SUP>. Uniform performance of the 400 real-time PCR reservoirs was achieved through our fabrication process. The amplicons and their fluorescent signals were isolated in each hydrogel spot, whose detection limit was measured to 16 aM, covering a seven-log concentration range. With the PIN spots of different primers, multiple miRNAs could be quantified in a single reaction out of very limited amount of RNA. For proof of concept, ten different miRNAs from the medial habenula of a mouse which is small region of the brain were successfully analyzed.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We achieved 400 hydrogel spots array in 1 cm<SUP>2</SUP> with excellent structural and functional uniformity. </LI> <LI> We developed the multiplex qPCR array chip for fast and simple workflow. </LI> <LI> This qPCR chip successfully detected as low as 16 aM of miRNA with a wide dynamic range of seven logs. </LI> <LI> Ten miRNAs from medial habenula of mouse brain were profiled at once in a 10 × 10 array. </LI> </UL> </P>