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A High Throughput VLSI Architecture For LZ Algorithm
Lee,Taeyoung,Lee,Yongsurk,Lee,Moonkey,Nam,Seunghyun THE RESEARCH INSTITUTE OF ASIC DESIGN YONSEI UNIVE 1995 Journal of the Research Institute of ASIC Design Vol.2 No.1
This paper proposes a novel VLSI architecture which can process Lempel-Ziv-based adaptive data compression algorithm at high speed. The compression architecture is composed of five main blocks : PE-based Match Block, Consecutive Hit Checker, Pointer Generator, Length Generator, and Code Packer. From the view point of hardware cost and compression ratio, the dictionary buffer of 1024 bytes and the maximum allowable match length of 16 bytes are utilized. The proposed architecture has the following features. (1)Since it is designed in systolic array, our architecture is easy to implement and has simple control logic. (2)It processes exactly one character per one clock cycle, i.e., it doesn't need any accumulated shift operations for re-initiating the dictionary buffer which delay the operation considerably. (3)It can operate up 40 MHz according to the post-layout simulation of the critical path. 4)It can be used in real-time data compression for video coding or information storage with the input processing capability of 40 Mega symbols(characters) per second.
Ha, Jungmin,Kim, Myoyeon,Kim, Moon Young,Lee, Taeyoung,Yoon, Min Young,Lee, Jayern,Lee, Yeong‐,Ho,Kang, Young‐,Gyu,Park, Jun Seong,Lee, John Hwan,Lee, Suk‐,Ha John Wiley & Sons 2018 Journal of the Science of Food and Agriculture Vol.98 No.6
<P>CONCLUSIONWe detected major differences in the transcriptional levels of genes involved in the biosynthesis of proanthocyanidin and anthocyanin among genotypes beginning at the early stage of seed development. The results of the present study provide insights into the underlying genetic variation in proanthocyanidin biosynthesis among soybean genotypes. (c) 2017 Society of Chemical Industry</P>
Taeyoung Kim,Eonjoo Park,Jun Suk Eun,Eun-young Lee,Ji Won Mun,Yunsang Choi,Shinyoung Lee,Hansol Yeom,Eunkyoung Kim,Jongmu Kim,Jihyun Choi,Jinho Ha,Sookkyung Park 한국역학회 2023 Epidemiology and Health Vol.45 No.-
OBJECTIVES: As few mpox cases have been reported in Korea, we aimed to identify the characteristics of mpox infection by describing our epidemiologic investigation of a woman patient (index patient, the third case in Korea) and a physician who was infected by a needlestick injury (the fourth case). METHODS: We conducted contact tracing and exposure risk evaluation through interviews with these 2 patients and their physicians and contacts, as well as field investigations at each facility visited by the patients during their symptomatic periods. We then classified contacts into 3 levels according to their exposure risk and managed them to minimize further transmission by recommending quarantine and vaccination for post-exposure prophylaxis and monitoring their symptoms. RESULTS: The index patient had sexual contact with a man foreigner during a trip to Dubai, which was considered the probable route of transmission. In total, 27 healthcare-associated contacts across 7 healthcare facilities and 9 community contacts were identified. These contacts were classified into high (7 contacts), medium (9 contacts), and low (20 contacts) exposure risk groups. One high-risk contact was identified as a secondary patient: a physician who was injured while collecting specimens from the index patient. CONCLUSIONS: The index patient visited several medical facilities due to progressive symptoms prior to isolation. Although the 2022 mpox epidemic mainly affected young men, especially men who have sex with men, physicians should also consider mpox transmission in the general population for the timely detection of mpox-infected patients.
Lee, Taeyoung,Kim, Moon Young,Ha, Jungmin,Lee, Suk-Ha,Scofield, D. Canadian Science Publishing 2018 Genome Vol.61 No.10
<P> Large sequence insertion (LSI) is one of the structural variations (SVs) that may cause phenotypic differences in plants. To identify the LSIs using medium-coverage sequencing data of four wild soybean (Glycine soja) genotypes, we designed a hybrid approach combining de novo assembly and read mapping. Total reads and reads with both ends unmapped were independently assembled into “ordinary contigs” and “orphan contigs”, respectively, and subjected to pairwise alignment and stringent filtering. This approach predicted 24 LSIs averaging 2682 bp in size, with no overlap with SVs detected by Pindel, BreakDancer, or ScanIndel, and they were validated by PCR. Compared with the soybean (Glycine max) reference genome, 20 LSIs were located outside genic regions. One of the four LSIs within a genic region, LSI05, is located in the coding DNA sequence region of a protein kinase superfamily gene (Glyma.08G123500). It caused delayed translation initiation and loss of 24 amino acids in the wild soybean genotype CW12. LSI05 was more frequently observed in 29 G. soja accessions than in 34 G. max accessions. Identified LSIs would be genomic resources harboring novel gene contents for studying SVs and improving crops. Moreover, our cost-efficient approach may be applicable to other plant species. </P>
Extraction of Salinity-Gradient Energy by a Hybrid Capacitive-Mixing System
Lee, Jiho,Yoon, Hongsik,Lee, Jaehan,Kim, Taeyoung,Yoon, Jeyong Wiley (John WileySons) 2017 ChemSusChem Vol.10 No.7
<P>Salinity-gradient energy (SGE) is a renewable energy source available wherever two solutions with different salinity mix. Capacitive-mixing (Capmix) is a technology that directly extracts the SG potential through the movements of ions in high- and low-concentration solutions. However, the energy-harvesting performance of Capmix needs further improvement. Herein, a hybrid Capmix that consists of a battery and capacitive electrodes is proposed. In this system, sodium ions and anions are captured/released by the metal oxide and carbon electrodes, respectively. The hybrid Capmix extracted an energy density that was approximately three times higher (130Jm(-2)) and exhibited a notable power output (97mWm(-2)) compared to the previous Capmix using ion-exchange membranes. Furthermore, the hybrid system operated successfully with real river water and seawater. These results suggest that the hybrid Capmix could be a viable option to harvest energy from salinity gradients.</P>
Reconsidering Clinical Staging Model: A Case of Genetic High Risk for Schizophrenia
TaeYoung Lee,Minah Kim,SungNyun Kim,JunSoo Kwon 대한신경정신의학회 2017 PSYCHIATRY INVESTIGATION Vol.14 No.1
The clinical staging model is considered a useful and practical method not only in dealing with the early stage of psychosis overcoming the debate about diagnostic boundaries but also in emerging mood disorder. However, its one limitation is that it cannot discriminate the heterogeneity of individuals at clinical high risk for psychosis, but lumps them all together. Even a healthy offspring of schizophrenia can eventually show clinical symptoms and progress to schizophrenia under the influence of genetic vulnerability and environmental stress even after the peak age of onset of schizophrenia. Therefore, individuals with genetic liability of schizophrenia may require a more intensive intervention than recommended by the staging model based on current clinical status.
Lee, Changsoo,Lee, Chulhee,Shin, Kihyun,Song, Taeyoung,Jeong, Hu Young,Jeon, Duk Young,Lee, Hyuck Mo Elsevier 2019 CATALYSIS COMMUNICATIONS - Vol.129 No.-
<P><B>Abstract</B></P> <P>Water electrolysis has received great attention for producing hydrogen, but sluggish kinetics of oxygen evolution reaction (OER) has remained a big challenge. Recently, cobalt sulfide materials have been widely explored as great choice in highly efficient electrocatalysts due to their good electrical conductivity and bi-functionality toward OER and hydrogen evolution reaction (HER). However, cobalt sulfide shows outstanding HER activity, but its OER activity should be improved. Herein, hexagonal-phase cobalt sulfide (CoS) nanowires with abundant stepped surfaces and defect sites were prepared via a seed-growth approach with silver sulfide (Ag<SUB>2</SUB>S) nanoparticles. The Ag<SUB>2</SUB>S-CoS hetero-nanowires (HNWs) exhibited excellent electrochemical performances for oxygen evolution reaction (overpotential = 275 mV, Tafel slope = 77.1 mVdec<SUP>−1</SUP>, charge transfer resistance = 1.3 Ω) in 1.0 M KOH solution. The origin of superior activity was investigated using a combined experimental and theoretical approach. This work highlights the importance of surface defects for improving oxygen evolution reaction performance of water electrolysis.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Hexagonal-phase CoS hetero-nanowires were synthesized using seeded growth with Ag<SUB>2</SUB>S nanoparticles. </LI> <LI> Abundant stepped surface improved catalytic activity toward oxygen evolution reaction. </LI> <LI> Combined experimental and theoretical study for explaining the excellent catalytic performances </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Advanced braking algorithm for robust longitudinal risk management
Lee, Taeyoung,Kim, Taewoo,Kim, Beomjun,Yi, Kyongsu,Lee, Jaewan Professional Engineering Publishing Ltd 2016 Proceedings of the Institution of Mechanical Engin Vol. No.
<P>This paper describes an advanced braking algorithm for robust longitudinal risk management to prevent or mitigate rear-end collisions. Since the proposed safety system works in conjunction with a human driver, the longitudinal safety system must be acceptable to the driver. The key to achieving this is to ensure that control signals are given at the appropriate time. In order to construct an suitable control system, a new longitudinal safety index was developed by using the time to collision and the warning index, which are well-known safety parameters in longitudinal safety control. The clearance and the relative velocity constitute essential signals for safety monitoring in longitudinal safety control. These measured sensor signals include the uncertainty in the measurement noise. To design a robust safety monitoring and control mode decision, information consisting of fusion of the measurement signals was obtained. In addition, an expected error range of the proposed safety index from the measurement noise can be defined from the covariance matrix of the Kalman filter and the deviation of the function of the new longitudinal safety index. The control performance of the proposed algorithm was evaluated by analysis of the simulation results. From this analysis, it can be concluded that the proposed advanced braking algorithm can substantially enhance the longitudinal safety and can guarantee a robust performance with respect to the sensor uncertainty.</P>