Visual Attentional Pattern of the Eyewitness in a Mock Crime with Weapon Presence

San Ho Lee(San Ho Lee),Chankyu Lee(Chankyu Lee),Gi-Eun Lee(Gi-Eun Lee),Jang-Han Lee(Jang-Han Lee) 한국자료분석학회 2022 Journal of the Korean Data Analysis Society Vol.24 No.5

The weapon focus effect is defined as eyewitnesses focus more on weapons than other details(e.g., perpetrator) of the crime scene which cause memory bias. The present study investigated how the presence of a weapon affects the visual attention and memory of the eyewitness. Participants were randomized within two groups: the weapon focus effect condition(WC) and the novelty condition(NC). The participants' visual attention pattern(dwell time) was measured while participants were observing the interaction between the two individuals(clerk and customer) at the mock crime slide show. At the end of the experiment, the participants were asked about what they saw on the slide show. As a result, it was confirmed that the weapon condition showed a different attention pattern from those in the non-weapon condition. Overall, both groups were found to spend more time on target objects(knife/cashier's check), but WC participants spent longer time on clerks when weapons were presented than NC participants. On the other hand, in both groups, there was no difference in memory. This study provided evidence for the visual attention patterns of eyewitnesses at simulated crime scenes with weapons.

Wi-Fi Backscatter Systems for IoT Sensors with Enhanced Communication Reliability

김찬규(Chankyu Kim),백성민(Seongmin Baek),이성주(Seongjoo Lee) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8

IoT 기술이 발전함에 따라 배터리 문제가 대두되었다. 미국의 워싱턴 대학에서 저전력으로 Tag를 동작시키는 Wi-Fi 백스케터 기술을 처음 제시하였다. 그러나 이 방식은 전송 성능 및 전송률이 낮다는 단점이 있었다. 이를 개선하기 위해 Tag에서 에너지를 조절하는 M-레벨 변조 방식을 통해 전송률을 높이는 방법이 제시되었다. 그러나 M-레벨 변조 방식은 낮은 SNR환경에서 신뢰성이 떨어지는 문제점이 있었다. 본 논문에서는 딥러닝 기반의 수신기를 구성함으로써 낮은 SNR 환경에서도 Wi-Fi backscatter 시스템의 성능을 높일 수 있도록 하였다. 또한, Tag의 구성을 그대로 적용하기 때문에 전송률뿐 아니라 Tag에서 배터리가 필요하지 않으며, 사용되는 에너지가 적다는 장점도 있다. 제안하는 딥러닝 방식은 2-level일 때 22dB SNR 환경에서 10-3 BER 성능을 확인하였다.

Comparison of the Insect and Mammalian Olfactory Receptor Systems on the Basis of Genome Analysis Results - How Similar They Are?

Chankyu Park,Dinh Truong Nguyen,Kyooyeol Lee 한국응용곤충학회 2013 한국응용곤충학회 학술대회논문집 Vol.2013 No.04

Insects and animals can recognize surrounding environments by detecting thousands of chemical odorants. Olfaction is a complicated process that begins in the olfactory epithelium with the specific binding of volatile odorant molecules to dedicated olfactory receptors (ORs). OR proteins are encoded by the largest gene superfamily in the mammalian genome. We report here the whole genome analysis of the olfactory receptor genes of S. scrofa using conserved OR gene specific motifs and known OR protein sequences from diverse species. We identified 1,301 OR related sequences from the S. scrofa genome including 1,113 functional OR genes and 188 pseudogenes. OR genes were located in 46 different regions on 16 pig chromosomes. We classified the ORs into 17 families, three Class I and 14 Class II families, and further grouped them into 349 subfamilies. We also identified inter- and intra-chromosomal duplications of OR genes residing on 11 chromosomes. A significant number of pig OR genes (n=212) showed less than 60% amino acid sequence similarity to known OR genes of other species. We also performed a similar analysis on the cattle OR subgenome and identified 1,071 OR related sequences. We show that S. scrofa has one of the largest OR repertoires, suggesting an expansion of OR genes in the swine genome. Considering available information from literature, it seems that OR systems between mammals and insects possess high similarity in their action mechanisms and rapid evolutionary changes due to differences in living environments.

Modeling and Control of an Electronic-Vacuum Booster for Vehicle Cruise Control

Chankyu Lee,Kyongsu Yi 대한기계학회 2002 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.16 No.10

A mathematical model and control laws for an Electronic-Vacuum Booster (EVB) for application to vehicle cruise control will be presented. Also this paper includes performance test result of EVB and vehicle cruise control experiments. The pressure difference between the vacuum chamber and the apply chamber is controlled by a PWM-solenoid-valve. Since the pressure at the vacuum chamber is identical to that of the engine intake manifold, the output of the electronic-vacuum booster is sensitive to engine speed. The performance characteristics of the electronic-vacuum booster have been investigated via computer simulations and vehicle tests. The mathematical model of the electronic-vacuum booster developed in this study and a two-state dynamic engine model have been used in the simulations. It has been shown by simulations and vehicle tests that the EVB-cruise control system can provide a vehicle with good distance control performance in both high speed and low speed stop and go driving situations.<br/>

Transcriptional Activation of the Aldehyde Reductase YqhD by YqhC and Its Implication in Glyoxal Metabolism of Escherichia coli K-12

Lee, Changhan,Kim, Insook,Lee, Junghoon,Lee, Kang-Lok,Min, Bumchan,Park, Chankyu American Society for Microbiology 2010 Journal of Bacteriology Vol.192 No.16

<B>ABSTRACT</B><P>The reactive α-oxoaldehydes such as glyoxal (GO) and methylglyoxal (MG) are generated <I>in vivo</I> from sugars through oxidative stress. GO and MG are believed to be removed from cells by glutathione-dependent glyoxalases and other aldehyde reductases. We isolated a number of GO-resistant (GO<SUP>r</SUP>) mutants from <I>Escherichia coli</I> strain MG1655 on LB plates containing 10 mM GO. By tagging the mutations with the transposon Tn<I>phoA</I>-132 and determining their cotransductional linkages, we were able to identify a locus to which most of the GO<SUP>r</SUP> mutations were mapped. DNA sequencing of the locus revealed that it contains the <I>yqhC</I> gene, which is predicted to encode an AraC-type transcriptional regulator of unknown function. The GO<SUP>r</SUP> mutations we identified result in missense changes in <I>yqhC</I> and were concentrated in the predicted regulatory domain of the protein, thereby constitutively activating the product of the adjacent gene <I>yqhD</I>. The transcriptional activation of <I>yqhD</I> by wild-type YqhC and its mutant forms was established by an assay with a β-galactosidase reporter fusion, as well as with real-time quantitative reverse transcription-PCR. We demonstrated that YqhC binds to the promoter region of <I>yqhD</I> and that this binding is abolished by a mutation in the potential target site, which is similar to the consensus sequence of its homolog SoxS. YqhD facilitates the removal of GO through its NADPH-dependent enzymatic reduction activity by converting it to ethadiol via glycolaldehyde, as detected by nuclear magnetic resonance, as well as by spectroscopic measurements. Therefore, we propose that YqhC is a transcriptional activator of YqhD, which acts as an aldehyde reductase with specificity for certain aldehydes, including GO.</P>

Evaluation of nutritional value in plant-based canned tuna products

Chankyu Lee,Dongwoo Kim,Jiwon Song,Yeseul Lee,Bongkyun Kim,Jinhyun Kim,Seunghyeon Jung 한국식품영양과학회 2022 한국식품영양과학회 학술대회발표집 Vol.2022 No.10

Characterization of the<i>Escherichia coli</i>YajL, YhbO and ElbB glyoxalases

Lee, Changhan,Lee, Junghoon,Lee, Ju-young,Park, Chankyu,Saraiva, Lí,gia Oxford University Press 2016 FEMS microbiology letters Vol.363 No.3

Screening for<i>Escherichia coli</i>K-12 genes conferring glyoxal resistance or sensitivity by transposon insertions

Lee, Changhan,Kim, Jihong,Kwon, Minsuk,Lee, Kihyun,Min, Haeyoung,Kim, Seong Hun,Kim, Dongkyu,Lee, Nayoung,Kim, Jiyeun,Kim, Doyun,Ko, Changmin,Park, Chankyu,Calendar, Richard Published by Elsevier/North Holland on behalf of t 2016 FEMS microbiology letters Vol.363 No.18

근대 정신의학의 관점에서 본 최한기의 감평이론

이나미 ( Lee Nami ),이찬규 ( Lee Chankyu ),이행훈 ( Lee Haenghoon ) 성균관대학교 인문학연구원(성균관대학교 인문과학연구소) 2017 人文科學 Vol.0 No.66

본고는 최한기의 저서 『인정(人政)』 중 「감평문」을 근대 정신의학적 관점으로 재해석하고 당시의 서양의학과 비교분석했다. 감평(鑑枰)은 사람을 파악하는 측인, 인재를 가르치는 교인, 인재를 고르는 선인, 인재를 쓰는 용인의 네 가지 문으로 구성된다. 측인은 기품, 심덕, 체용, 문견, 처지의 세부 요소를 통해 사람을 파악하는 방법을 논한다. 기품의 강약과 청탁, 심덕의 성위와 순박, 체용의 후박과 추미, 문견의 주비와 아속, 처지의 귀천과 빈부를 기준으로 사람을 파악하여, 이들 요소의 경중을 10분으로 나누어 각 항목을 수량화한다. 이처럼 성품을 수량화하는 방식은 근대서양 정신의학에서 태동했던 분류법과 유사하다. 성리학의 심성론이나 불교의 심층심리학적 분류법이 주관적인 형이상학적 분류법이라면, 감평론 은 경험과 관찰에 따른 객관적 기준을 마련했다는 점에서 근대정신의학의 진단법과 유사한 부분이 있다. 최한기는 나아가 신분에 따른 관습적 분류가 아닌 개인의 외적 조건과 내적인 성품으로 인품을 파악하고 등용할 것을 역설했다. 이는 최한기의 진보성과 실용적인 방안을 구체적으로 가늠해 볼 수 있는 단초가 된다. 일반적으로 사상의학은 체형과 성격 질병의 차이를 주로 다루었고, 서양정신의학은 증상과 질병 위주로 인간심리를 분류해 온 것으로 본다. 이에 비해 최한기의 감평문은 전인적으로 성품 전체를 파악하려는 시도였다는 점에서 융 심리학의 전체정신, 즉 자기(Self)의 추구와 맞닿는다. 인간성격을 분류하고 수량화한 감평론은 19세기 서양의 성격유형론과 정신병리학의 발아와 유사점을 보인다. 최한기가 제시한 유형론의 통합적 분석 모델은 서양의 정신 병리학이나 성격이론과는 목적이나 대상 방법이 다르지만 근대 정신의학과 심리학분야의 방법론에도 매우 유의미한 단서가 된다. “Gampyeong” in In-jeong (Politics and Humanity) by Choi Hanki is an essay on evaluation and selection of a capable person, which shows a significant achievement in terms of modern diagnostic evaluation techniques. “Gampyeong” is composed of four chapters: evaluation, teaching, selection, and encouragement of capable human resources. The chapter on evaluation breaks down into: 1) strength and clarity of characters; 2) morality and hospitality; 3) appearance; 4) knowledge and experience; and 5) material resources. From its scoring using tables and numbers, we may infer that he was influenced by Western scientific method. Choi realized that social corruption relying on personal connection hindered qualified officers from being appointed. He criticized society where bribery and favoritism, instead of capability, were key factors for promotions and appointments. He made strong efforts to make objective references and rational methods for human resource management based on Kihak, which is a more pragmatic and materialistic world view. Different from Yi Jema`s Sasang Euihak (or Sasang Constitutional Medicine, a typology based on four human physical temperaments and psychological characters), Gampyeong shows a more integrative and holistic understanding of human beings. He emphasized the longitudinal approach toward human development of characters. Evaluation of a socio-economic status, which was not always correlated to the hierarchical class system in the Joseon dynasty, was a reformist approach toward human and social development. Compared with its typology counterparts in Western psychology, Gampyeong set a good precedent for modern psychology, although his theory did not evolve into the level of Western psychopathology and failed to have any significant followers. To revisit and reilluminate Gampyeong requires further efforts to integrate the Eastern and Western methods on human typology in the 21st century.

건설공사 사후평가센터 중장기계획 수립 방안

이찬규(Lee, Chankyu) 대한토목학회 2022 대한토목학회 학술대회 Vol.2022 No.10