Selection Attributes and Trends of Thermoplastic Elastomers for Automobile Parts

( Seongkyun Kim ),( Joon Chul Park ),( Mi Young Jo ),( Jun Il Park ),( Jae Yeong Bae ),( Seok Jin Choi ),( Il Kim ) 한국고무학회 2017 엘라스토머 및 콤포지트 Vol.52 No.1

Thermoplastic elastomers (TPEs), a unique class of polymers, combine the processing ease of thermoplastics with the advanced properties of thermoset rubbers. TPEs can be remelted several times without any significant loss of properties, and can be molded into complex shapes using conventional processing equipment. Due to their characteristics, TPEs are ideal for use in a variety of applications in the automotive field. Although the TPE market of the Republic of Korea is currently at its niche, the increasing manufacturing push from major companies is expected to open up multiple opportunities for these products in the automotive sector. This manuscript highlights a detailed technological trend of the global automotive thermoplastic elastomers market.

Investigation of insect holding a pathogen in the orchards where fire blight occurs

Seongkyun Lee,Young Uk Park,Seok Ho Lee,Jong Woo Han,In Jae Kim,Young-Ho Kim 한국응용곤충학회 2021 한국응용곤충학회 학술대회논문집 Vol.2021 No.04

Vulnerability-Based Critical Neurons, Synapses, and Pathways in the <i>Caenorhabditis elegans</i> Connectome

Kim, Seongkyun,Kim, Hyoungkyu,Kralik, Jerald D.,Jeong, Jaeseung Public Library of Science 2016 PLoS computational biology Vol.12 No.8

<▼1><P>Determining the fundamental architectural design of complex nervous systems will lead to significant medical and technological advances. Yet it remains unclear how nervous systems evolved highly efficient networks with near optimal sharing of pathways that yet produce multiple distinct behaviors to reach the organism’s goals. To determine this, the nematode roundworm <I>Caenorhabditis elegans</I> is an attractive model system. Progress has been made in delineating the behavioral circuits of the <I>C</I>. <I>elegans</I>, however, many details are unclear, including the specific functions of every neuron and synapse, as well as the extent the behavioral circuits are separate and parallel versus integrative and serial. Network analysis provides a normative approach to help specify the network design. We investigated the vulnerability of the <I>Caenorhabditis elegans</I> connectome by performing computational experiments that (a) “attacked” 279 individual neurons and 2,990 weighted synaptic connections (composed of 6,393 chemical synapses and 890 electrical junctions) and (b) quantified the effects of each removal on global network properties that influence information processing. The analysis identified 12 critical neurons and 29 critical synapses for establishing fundamental network properties. These critical constituents were found to be control elements—i.e., those with the most influence over multiple underlying pathways. Additionally, the critical synapses formed into circuit-level pathways. These emergent pathways provide evidence for (a) the importance of backward locomotion, avoidance behavior, and social feeding behavior to the organism; (b) the potential roles of specific neurons whose functions have been unclear; and (c) both parallel and serial design elements in the connectome—i.e., specific evidence for a mixed architectural design.</P></▼1><▼2><P><B>Author Summary</B></P><P>One of the most important scientific aims is to uncover the functional design principles of nervous systems. To reach this aim, it is useful to examine a complex nervous system that is both well specified and highly tractable, making the nematode roundworm <I>Caenorhabditis elegans</I> an attractive model system, especially since it is the only complete connectome currently available for analysis. In this computational study, we tested the effects of individual attacks on every neuron and synaptic connection in the <I>C</I>. <I>elegans</I> connectome to identify and characterize the most critical constituents of the network by quantifying the changes in key network properties of the connectome that influence information processing. Our analysis identified 12 neurons and 29 synapses critical to clustering, information integration and propagation. These critical constituents formed circuit-level structures that control network processing in the <I>C</I>. <I>elegans</I> connectome. We believe our study provides a significant advance in the understanding of the network topology of the <I>C</I>. <I>elegans</I> connectome, and provides insights into the fundamental architectural design of complex nervous systems.</P></▼2>

Corn leaf feeding amount by the development stages of Spodoptera frugiperda according to temperature

Seongkyun Lee,Seongkyun Lee,Jongok Jeon,Juhyung Kim 한국응용곤충학회 2022 한국응용곤충학회 학술대회논문집 Vol.2022 No.10

국내 주요지역의 사과 바이러스 및 바이로이드 5종의 발생 현황

이성균(Seongkyun Lee),차재순(Jae-Soon Cha),권의석(Yeuseok Kwon),이윤상(Yun Sang Lee),유세은(Se Eun Yoo),김주형(Ju Hyung Kim),김대일(Daeil Kim) 한국식물병리학회 2020 식물병연구 Vol.26 No.2

사과 바이러스 4종(Apple chlorotic leaf spot virus [ACLSV], Apple stem pitting virus [ASPV], Apple stem grooving virus [ASGV], Apple mosaic virus [ApMV]), 바이로이드 1종(Apple scar skin viroid [ASSVd])을 대상으로 국내 감염률을 조사한 결 과, 감염률은 97.3%로 대부분의 사과나무가 바이러스 및 바이 로이드에 감염되어 있는 것으로 조사되었다. 지역별로는 정선 98.8%, 단양 100%, 예산 100%, 장수 89.1%, 무주 98.1%였으며, 바이러스 및 바이로이드 각각의 감염률은 ASGV 93.4%, ASPV 85.7%, ACLSV 59.0%, ASSVd 6.7%, ApMV 3.6% 순으로 ASGV 의 감염률이 가장 높았고 ApMV의 감염률이 가장 낮은 것으로 조사되었다. 또한, 바이러스 및 바이로이드 2종 이상 복합 감염 비율은 84.8%로 단 1종만 감염된 비율인 12.4%와 비교하여 약 7배 가까이 되는 것으로 조사되었다. The investigation of the infection rate of domestic apple orchards by four types of apple viruses (Apple chlo- rotic leaf spot virus [ACLSV], Apple stem pitting virus [ASPV], Apple stem grooving virus [ASGV], Apple mosaic virus [ApMV]) and one type of viroid (Apple scar skin viroid, ASSVd) found that most apple trees were infected with viruses and viroid at the rate of 97.3%. By region, the infection rate in Jeongseon stood at 98.8%, Dan- yang at 100%, Yesan at 100%, Jangsu at 89.1%, and Muju at 98.1%. By each virus and viroid, the infection rate of ASGV was the highest at 93.4%, followed by ASPV at 85.7%, ACLSV at 59.0%, ASSVd at 6.7%, and ApMV at the lowest 3.6%. In addition, 84.8% of the cases were infected with two or more types of viruses and viroid, nearly seven times the single type infection rate of 12.4%, and the cases infected with three viruses, ASPV, ACLSV, and ASGV accounted for 56.2%, more than the half the total number of trees investigated.

형용사의 의미가 색 구별에 미치는 영향

홍성균(Seongkyun Hong),김경호(Kyungho Kim),이형철(Hyung-Chul O. Li),김신우(ShinWoo Kim) 한국인지과학회 2017 인지과학 Vol.28 No.1

스트룹 효과(Stroop, 1935)는 매우 신뢰롭게 관찰되는 현상으로 이를 응용한 다양한 연구들이 존재한다 전통적인 스트룹 실험에서는 색과 색 이름을 실험자극으로 사용하였으나 이후 연구들은 어떤 색(예: green)과 색을 전형적으로 보여주는 대상의 이름(예: grass)을 사용한 경우에도 일치 혹은 불일치 조건에 따라 유사한 효과가 발생한다는 것을 보고하였다(Klein, 1964). 그런데 의미표상(semantic representation)의 검증을 위해 스트룹 효과를 활용한 기존 연구들은 대부분 구체적인 대상들과 색의 연합을 검증했기 때문에 구체명사(concrete noun)와 그에 상응하는 색 이름을 연구에 활용하였다(예: Dalrymple-Alford, 1968, 1972; Klein, 1964). 그런데 최근 Sherman과 Clore(2009)는 구체적 대상이 없는 단어의 도덕적인 의미(예: honesty, crime)에 따라 흰색 혹은 검은색으로 제시되었을 때에도 색에 대한 반응이 빨라지거나 느려진다는 것을 보고하였다 이에 근거하여 본 연구에서는 스트룹 과제를 사용하여 형용사의 온열감각 차원의 의미(예: 따스한 냉정한) 와색온도(따뜻한 색, 차가운 색)의 연합을 스트룹 과제를 통해 검증하였다 그 결과 형용사의 온열차원의 의미와 색 온도가 불일치할 때 보다 일치할 때 참가자들은 색에 대해 더 빠르게 반응한다는 것을 확인할 수 있었으며 형용사의 의미와 색 온도 간의 상호작용을 관찰할 수 있었다 본 연구의 결과는 스트룹 관련 연구들에서 주로 사용해온 구체명사가 아닌 추상적인 형용사에서도 스트룹 효과가 발생한다는 것을 보여주었다는 점에서 기존 연구들과 차이점을 가진다 또한 무채색을 사용한 Sherman과 Clore(2009)의 연구와 달리 색상을 사용한 경우에도 단어의 의미에 따라 스트룹 효과를 획득할 수 있다는 새로운 결과를 보여준다. Stroop effect(Stroop, 1935) is a reliable paradigm which has been used in various psychological research. Although classic Stroop experiment used color and color name for experimental stimuli, subsequent research reported that a color(e.g. green) and an object(e.g. grass) which displays a typical color show similar effects depending on color-object congruency(Klein, 1964). Because past research that used Stroop effect to investigate semantic representation tested association between concrete object and color, they predominantly used concrete nouns and their corresponding color names as stimuli(e.g. Dalrymple-Alford, 1968, 1972; Klein, 1964). Recently, Sherman and Clore(2009) reported that response time to white or black words is affected by moral value of words (e.g., honesty, crime) even when the words do not have specific referents. Based on this result, we tested association between thermesthesia-related adjectives(e.g., 따스한, 냉정한) and color(worm color, cold color) using Stroop task. The results showed that subjects were faster in their response to color when adjective-color was congruent than when incongruent, and there was an interaction between color and meaning of adjectives. The Stroop effect in this research is unique because, contrary to previous research that used concrete nouns, the effect was obtained even with abstract adjectives which do not have specific referents. In addition, unlike Sherman and Clore(2009) that used achromatic color, our results show that Stroop effect obtains between abstract adjectives and chromatic color.

Surface-Modified Mesh Filter for Direct Nucleic Acid Extraction and its Application to Gene Expression Analysis

You, Jae Bem,Kim, Yong Tae,Lee, Kyoung G.,Choi, Yunho,Choi, Seongkyun,Kim, Chi Hyun,Kim, Kyung Hoon,Chang, Sung Jin,Lee, Tae Jae,Lee, Seok Jae,Im, Sung Gap Wiley - VCH Verlag GmbH & Co. KGaA 2017 Advanced Healthcare Materials Vol.6 No.20

A Long-Term Comparative Study on Macrolepidoptera Diversity in Three Types of Vegetations from Worak-san [Mt.] in 2009

Eunsol Lee,Hyungjin Park,Seongkyun Lee,Seulki Kim,Jung Min Han,Taeho Kim,Chang gi Hong,Soowon Cho 한국응용곤충학회 2010 한국응용곤충학회 학술대회논문집 Vol.2010 No.05

With the help of KLTER/ME and KLPS in Woraksan, we have surveyed monthly diversity and seasonal prevalence of Macrolepidoptera in Wol-ak-san [Mt.] for the period of five months from May to September since 2005. Since 2007, to reduce variation, we chose two monitoring points, instead of one, for each of the three representative vegetations: Quercus mongolica-, Quercus variabilis- and Pinus densiflora-formations, abbreviated as QM, QV and PD, respectively, and collected exclusively larger moths with bucket-type of light traps for quantified survey. In 2009, as a result, QV showed higher species diversity and specimen number than QM or PD although the differences between QV and QM are subtle. The number of individuals collected may not be a good indicator, e.g., Idaea biselata collected in QM in June was over 200 in 2007, which is more than twice the number of specimens in all other sites per month, while the number in 2008 was dropped to only 10 specimens. In 2009, they became a dominant species again, showing biennial dominancy trend. It also seems that we are experiencing major decline of specimen numbers: 651 specimens collected in 2009 while 874 specimens collected in 2008, which was already a big reduction compared to over 2500 specimens in 2007

A Long-Term Comparative Study on Macrolepidoptera Diversity in Three Types of Vegetations from Worak-san [Mt.] in 2010

So-Young Lee,Eunsol Lee,Seongkyun Lee,Seulki Kim,Taeho Kim,Chang gi Hong,Hyungjin Park,Soowon Cho 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.05

We have surveyed monthly diversity and seasonal prevalence of Macrolepidoptera in Wol-ak-san [Mt.] for the period of four months from May to August in 2010. Although it is not a part of KLTER/ME and KLPS study in Wol-ak-san conducted in recent few years, this year's data may be comparable with the previous ones as the collection sites and dates are very similar. The three representative vegetations are Quercus mongolica-, Quercus variabilis- and Pinus densiflora-formations, abbreviated as QM, QV and PD, respectively, and we collected exclusively larger moths with bucket-type of light traps for quantified survey. In 2010, as a result, QV showed higher species diversity and specimen number than QM or PD although the differences between QV and QM are very subtle. The result is very similar to the result in 2009. The only difference in 2010 over 2009 is that the number of species, not specimens, has been increased 1.5 times, and this may be caused by the inclusion of July records, which has been usually deleted due to heavy rainy season causing poor collection records. The number of species in Noctuidae was the highest in 2010, about twice more than that in 2009, but the dominant species in 2010 were either Pyralidae (Nacoleia commixta or Bradina geminalis) or Geometridae (Arichanna melanaria). We are still experiencing decline of specimen numbers: 567 specimens collected in 2010 while 651 in 2009 and 874 in 2008, which was already a huge reduction compared to over 2500 specimens in 2007.

보은지역 대추과원 나방류 해충 3종의 발생 소장

이성균,김충우,이경희,이종원,오하경,한종우,김상희,김영호,Lee, Seongkyun,Kim, Chungwoo,Lee, Kyeong Hee,Lee, Jong Won,Oh, Ha Kyung,Han, Jongwoo,Kim, Sang Hee,Kim, Youngho 한국응용곤충학회 2017 한국응용곤충학회지 Vol.56 No.3

최근 대추에 복숭아유리나방, 사과유리나방 복숭아심식나방이 대추과원에서 발생하고 있으나, 발생 생태에 대한 연구가 미비하여 좀더 효율적 방제시기를 설정하고자 페로몬 트랩을 이용하여 3년간 발생소장을 조사하였다. 그 결과 복숭아유리나방은 5월부터 10월까지 발생되었으며, 6월 중순과 9월 중순에 2번의 발생 최성기가 나타내었다. 사과유리나방의 경우 5월부터 10월까지 발생되었으며, 6월 중순 ~ 6월 하순과 9월 중순 ~ 9월 하순에 2번의 발생 최성기를 나타내었다. 하지만 발생 개체수가 많이 않았다. 복숭아심식나방의 경우 5월부터 10월까지 발생이 이루어졌으며, 7월 중순과 8월 하순 ~ 9월 중순에 2번에 걸쳐 발생 최성기를 나타내었다. Currently, clearwing moths and peach fruit moths are considered economically important pests of jujube in Boeun, Chungbuk, Korea. However, until now, specific studies on occurrence of the major pests of jujube in Boeun area, which could be useful for pest control, have not been carried out. In this study, seasonal occurrence of three pest moths (Synanthedon bicingulata, S. haitangvora, and Carposina sasakii) in jujube orchards was monitored using sex pheromone traps. Synanthedon bicingulata and S. haitangvora were monitored from 2013 to 2015. Adults of both species were captured from May to October, with two peaks in their occurrence: mid-June and mid-September for S. bicingulata, and mid- to late-June and mid- to late-September for S. haitangvora. However, S. haitangvora occurred in lower numbers than S. bicingulata. Adults of C. sasakii were captured from 2014 to 2016. From May to October, two peaks were observed in their occurrence in mid-June and in late-August to mid-September and the second peak was lower than the first. Thus, the life histories of these pest moths of jujube should be studied in detail for an effective pest control.