野生藥草인 배초향의 發芽生理, 生育 및 成分分析에 關한 硏究

최성규,이종일,서영남,최경주,Choi, Seong-Kyu,Lee, Jong-Ill,Seo, Young-Nam,Choi, Kyeong-Ju 한국자원식물학회 1993 한국자원식물학회지 Vol.6 No.2

The experiment was carried out to study the influence of seeding dates, planting densities and fertilizer application levels on some agronmic characters and yield of fresh weight in Agastache rugosa. The results obtained are summarized as follow; Fresh weight was increased on Apr. 1 seeding date. Therefore, optimum time for sowing was on Apr. 1. Stem length was long in dense planting and short in spacious planting. Stem diameter was thick in spacious planting, and was thin in dense planting. Yield was higher in dense planting densities($10{\times}20cm:50\;plants/m^2,\;20{\times}20cm:25\;plants/m^2,\;(30{\times}20cm:17\;plants/m^2$) Fertilizing ($N:P_2O_5;K_2O=6:6:6kg/10a$) was increased than without fertilizing because stem length and number of leaf were good.

배출가스 저감장치(DPF) 부착에 따른 사회적 편익 추정

최성규,김용달,김호경,배진민,Choi, Soungkyu,Kim, Yongdal,Kim, Hogyeong,Bae, Jinmin 한국자동차안전학회 2018 자동차안전학회지 Vol.10 No.3

The People have a bad perception about diesel vehicle because of serious air pollution, increase fine dust and global vehicle company's diesel gate. Starting the project in 2005, Ministry of Environment has been supporting that is exhaust gas reduction devices (DPF) on diesel vehicles in the metropolitan area. During the period of 2017.01.01 to 2017.12.31, 10,030 diesel vehicles installed exhaust gas reduction devices (DPF). Among them, 9,921 diesel vehicles that they have sufficient data for analysis were analyzed amount of particulate matter reduction before and after exhaust gas reduction devices (DPF) was installed. Opacity smoke meter measures the concentration of particulate matter. So concentration of particulate matter was converted into a mass unit, and then calculated the total amount of reduced particulate matter. It was estimated that social benefits is costs required to remove it from the total amount of particulate matter.

수확시기에 따른 까마중 열매의 유용성분 및 생리활성 변화

최성규,윤경원,김용두,진성우,김경제,강경윤,고영우,임승빈,정상욱,서경순,Choi, Seongkyu,Yun, Kyeong-Won,Kim, Yong-Doo,Jin, Seong-Woo,Kim, Kyung-Je,Kang, Kyeong-Yun,Koh, Young-Woo,Im, Seung-bin,Jeong, Sang-Wook,Seo, Kyoung-Sun 한국식품저장유통학회 2017 한국식품저장유통학회지 Vol.24 No.6

본 연구는 까마중 열매의 수확시기에 따른 성분변화, 항산화효과 및 항염증 효과를 분석하여 최적 수확시기를 구명하였다. 까마중 열매의 유리당은 4가지가 검출되었으며, 유리당 중 fructose는 대체적으로 수확시기가 늦어짐에 따라 증가하였다. 까마중 열매의 주요 유기산은 malic acid와 acetic acid로 나타났으며, 총 유기산 함량은 10월 18일과 10월 25일에 수확한 까마중 열매들에서 높게 나타났다. 총 폴리페놀 함량은 10월 18일에 수확한 까마중 열매, 10월 11일에 수확한 까마중 열매 및 10월 25일에 수확한 까마중열매 순으로 높게 나타났다. 수확시기별 까마중 ethanol 추출물들의 항산화효과와 항염증효과 검정을 위하여 DPPH radical scavenging assay와 ABTS radical scavenging assay를 수행하였으며, 항염증 효과 측정을 위하여 lipopolysaccharide(LPS)로 염증을 유발시킨 RAW 264.7 cells을 NO 저해실험에 사용하였다. 항산화 효과와 항염증 효과는 10월 18일에 수확한 까마중 열매 ethanol 추출물에서 가장 높은 활성을 나타내었다. 10월 18일에 수확한 까마중 열매는 총 폴리페놀 함량, 항산화 효과 및 항염증 효과가 우수하였다. 까마중 열매의 수확시기에 따른 성분분석 및 생리활성 실험 결과, 까마중 열매의 최적 수확시기는 성숙 중기인 10월 18일과 10월 11일로 밝혀졌다. In this study, we investigated the variation in free sugars, organic acids, amino acids, antioxidant activity and anti-inflammatory effect of Solanum nigrum Linne fruits according to harvest time. Four kinds of free sugars (fructose, glucose, sucrose, maltose) were detected in S. nigrum fruit, and the free sugar contents varied significantly with harvest time. Organic acid content of S. nigrum fruit showed the highest in malic acid and acetic acid, and the highest content of total organic acids was found in S. nigrum fruit harvested on October $18^{th}$ and October $25^{th}$. For the total polyphenol content, S. nigrum fruit harvested on October $18^{th}$ was the highest. The strongest DPPH and ABTS radical scavenging activity was showed in S. nigrum fruit harvested on October $11^{th}$ and October $18^{th}$. The anti-inflammatory activity and antioxidant effects were the highest in the ethanol extract from S. nigrum fruit collected on October $18^{th}$ and October $11^{th}$. Thus, it seems the best to harvest of S. nigrum fruit harvested on October $11^{th}$ and October $18^{th}$.

제조업의 위기와 시스템엔지니어링

최성규,Choi, Sung Kyou 한국시스템엔지니어링학회 2006 시스템엔지니어링학술지 Vol.2 No.2

Manufacturing having formed spinal structure of the nation's industry is on the verge of collapse due to various kinds of reasons. We should seek and realize another sustainable engines of growth but can hardly find them except manufacturing as for now. It can be said, accordingly, that we are well advised to find the path leading to our ultimate goal just in the systems engineering approach, which can differentiate us from the neighbouring hunted and hunting countries with their inherent competitiveness. In this paper, the desirable way needed is reviewed with the direction for us to take being suggested.

양하(襄荷)의 경정배양(莖頂培養)에 관(關)한 연구(硏究) I. 기본부지(基本部地) 및 생장조절물질(生長調節物質)이 식물체(植物體) 재분화(再分化)와 유묘(幼苗)의 생장(生長)에 미치는 영향(影響)

최성규,서영남,Choi, Seong-Kyu,Seo, Young-Nam 한국약용작물학회 1993 韓國藥用作物學會誌 Vol.1 No.1

양하(襄荷)를 대양번식(大量繁植) 하고자 경정부위(莖頂部位)의 기내배양(器內培養) 방법(方法)을 확립(確立)하기위하여, 경정부위(莖頂部位)의 생장(生長)에 알맞은 기본부지(基本部地) 및 식물생장조절제(植物生長調節劑)의 농도(濃度)를 구명(究明)하고자 본(本) 실험(實驗)을 수행(遂行)하였던 바 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 양하(襄荷)의 경정부위(莖頂部位)는 치상후(置床後) $10{\sim}12주(週)$ 후(後)에 기관(器官) 분화현상(分化現像)이 나타나서 shoot와 root가 발생(發生)되었다 2. 양하(襄荷)의 경정(莖頂)은 MS기본부지(基本部地)에 치상(置床)한 환경(環境) 비교적(比較的) 생장(生長)이 잘 되었다. 3. 기내(器內)의 Plantlet의 생장(生長)은 식물생장조절제(植物生長調節劑) NAA 0.5ppm과 BA 5.0ppm의 혼합(混合) 첨가배지(添加培地)에서 좋은 경향(傾向)이었다. The present study was carried out to assess the possibility of rapid multiplication of Zingiber mioga ROSC. through in vitro culture of shoot-apex. The factor investigated was effect of various growth regulators on shoot-apex culture. The shoot-apex cultured of M. S. (Murashige and Skoog) medium developed into plantlet in 12 Weeks. M. S. medium containing NAA at 05ppm and BA 5.0ppm was found to be optimal for growth of in vitro plantlet.

청각장애학교 교사가 인식하는 실천적 지식의 정향과 구조의 관계 연구

최성규 ( Sung Kyu Choi ) 한국특수아동학회 2014 특수아동교육연구 Vol.16 No.3

이 연구는 청각장애학교 교사가 인식하는 실천적 지식의 정향과 구조에 대한 관계를 분석하기 위하여 수행되었다. 전국의 20개 청각장애학교 교사 309명의 설문지가 분석되었다. 이 연구의 설문지는 두 양상을 분석하기 위하여 적용되었다. 실천적 지식의 정향은 5개 구성요인으로 구성되었으며, 모두 25개의 문항으로 작성되었다. 실천적 지식의 구조는 3개의 구성요인의 15개 문항으로 제작되었다. 설문지의 타당도와 신뢰도를 위한 요인분석, 배경변인별 검증을 위한 t/F 분석, 그리고 Amos 모델링 방법 등이 적용되었다. 설문지의 타당도와 신뢰도 분석에서 실천적 지식의 정향은 5개 요인으로 구성되었으며, 실천적 지식의 구조는 3개 요인으로 구성되었다. 이 연구의 결과는 다음과 같다. 첫째, 실천적 지식의 정향은 청각장애학교 교사의 배경변인별에 따라서 통계적으로 유의미한 차이가 없었다. 그러나 실천적 지식의 구조는 청각장애학교 교사의 교직경력에 영향을 받는다. 특히 실천적 지식의 구조에 대한 인식이 청각장애학교 교사의 교직경력이 높을수록 긍정적인데, 이는 실천의 규칙 하위요인의 영향으로 설명된다. 둘째, 실천적 지식의 정향과 구조는 높은 상관관계를 보인다. 이 연구에서는 또한 실천적 지식의 정향과 구조의 중요성에 대하여 논의하고 있다. The purpose of this study was to illustrate the relationships between the orientation and structure of practical knowledge of the hearing impaired school teachers. This study was proposed by survey design. The questionnaire was divided into two parts, orientation of the practical knowledge with five sub-factors of 25 questions and structure of the practical knowledge with three sub-factors of 15 questions. The 309 teachers who were working for 20 hearing impairment schools were participated for this study. The factor analysis, t/F test, and Amos were utilized for this study, however the one item in the structure of the practical knowledge was deleted by low reliability. The orientation of the practical knowledge was consisted with five factors, however the structure of the practical knowledge was consisted with three factors. The results of this study were that: (a) there were not any relationships in the background variables of the hearing impairment school teachers in the orientation of the practical knowledge, however, the teaching experience was an important background variable to determine the structure of the practical knowledge, especially the rule of the practical knowledge; and (b) there was high reliability in the relationships between the orientation of the practical knowledge and the structure of the practical knowledge. Therefore, this study discussed what were the importances the orientation and structure of the practical knowledge.

간장 및 담도 : 만성간질환 및 간외담도폐쇄 환자에서 99mTc - DISIDA 간담도스캔을 통한 간세포기능의 평가

최성규 ( Sung Kyu Choi ),범희승 ( Hee Seung Bom ),양건호 ( Kun Ho Yang ),윤종만 ( Chong Mann Yoon ),김석빈 ( Suk Bin Kim ),박일종 ( Il Chong Park ),박해옥 ( Hae Ok Park ) 대한소화기학회 1986 대한소화기학회지 Vol.18 No.1

N/A Scintigraphic studies were performed in 15 normal subjecte, and 33 patients suffering from chronic parenchymal liver disease(liver cirrhosis 7, chronic hepatitis 5, hepatocellular carcinoma 1), and extrahepatic biliary obstruction(CBD stone 8, postoperative CBD stricture 4, pancreatic head ca 4, CBD ca 3, ampullary ca 1) using 99mc-DISIDA. Extraction and excretory functions of hepatocytes were evaluated with respect to liver-to-cardiac blood pool ratio(LCBPR) and washout index(WI). And relationships between these indexs and SGOT, total bilirubin levels were evaluated also. LCBPR was reduced in both patients groups(p< VVI was reduced only in those with extrahepatic biliary obstruction. LCBPR and WI were inversely correlated with total bilirubin levels(r=-0.49,-0 33, respectively).

청각장애대학생의 청각장애 인지, 농정체성, 농문화 인식에 미치는 교육환경의 군집적 특성

최성규(Choi, Sung-kyu) 한국청각·언어장애교육학회 2020 한국청각·언어장애교육연구 Vol.11 No.1

이 연구는 청각장애대학생 본인의 청각장애에 대한 인지, 농정체성, 그리고 농문화 인식의 차이에 영향을 미친 교육환경의 군집적 특성을 알아보기 위하여 조사연구로 수행되었다. 전국의 대학교에 재학하고 있는 청각장애대학생을 대상으로 설문하여 389명의 자료를 분석하였다. 설문지는 이정우(2015)가 개발한 청각장애에 대한 본인의 인지 6문항, 농정체감 7문항, 그리고 농문화 6문항을 동일하게 사용하였다. 요인분석 및 신뢰도 분석 등을 통하여 통합교육과 특수학교로 구분하여 t-test하였다. 연구결과는 첫째, 청각장애대학생은 교육환경에 관계없이 본인의 청각장애를 신체적 장애로 수용하지만, 학교 및 사회생활에서 큰 불편함이 없는 것으로 인식하고 있었다. 둘째, 청각장애대학생의 농정체성에 대한 교육환경의 군집적 특성은 문항의 내용에 따라서 달리 나타났다. 셋째, 청각장애대학생의 농문화 인식에 대한 교육환경은 차별성을 제공하는 주요 요인이 아니었다. 결론적으로 이 연구에서는 청각장애대학생의 청각장애 인지 및 농문화에 대한 인식은 듣고 말하기의 불편이라는 신체적 특성과 함께 사회활동 접근의 변형으로 형성되고 있으나, 농정체성을 구성하는 특정 내용에서는 교육환경이 인식의 차별성을 제공하는 원인으로 작용할 수 있음을 이 연구에서는 제안하고 있다. The purpose of this study was to investigate the clustering characteristics of the educational environment that influenced the college students with hearing impairment in their self-awareness of hearing impairment, deaf identity, and deaf culture. Data were collected from 389 students who were hearing impaired students in universities nationwide. The questionnaire used the same 6 items of self-awareness of hearing impairment, 7 items of deaf identity, and 6 items of deaf culture developed by Jung-woo Lee(2015). Through the factor analysis and the reliability analysis, t-test was conducted for the verification of the difference between the inclusive education and the special school. The results of the study were as follows: First, students with hearing impairment perceived their hearing impairment as a physical disability regardless of their educational environment, but perceived no discomfort in school and social life. Second, the clustering characteristics of the educational environment for the deaf identity of the hearing impaired students were different according to the content of the questions. Third, the characteristics of the educational environment were not the main factor that provided discrimination in the perception of hearing impaired students. In conclusion, in this study, hearing impaired students perception of hearing impairment and perception of deaf culture were formed as a variation of social activity approach with physical characteristics such as discomfort in hearing and speaking, but in certain contents of deaf identity, the educational environment differed from recognition.

청각장애학교에서 수학한 청각장애대학생의 정체성 연구 : 요인분석의 문항별 특성을 중심으로

최성규(Choi, Sung-Kyu) 부산대학교 교육발전연구소 2020 교육혁신연구 Vol.30 No.2

연구목적: 이 연구는 청각장애학교에서 수학한 청각장애대학생의 정체성을 알아보기 위하여 조사연구로 수행되었다. 연구방법: 전국의 대학교에 재학하고 있는 청각장애학생 중에서 청각장애대학교에서 수학한 120명의 자료를 수집하였다. 탐색적 및 확인적 요인분석을 통하여 설문 문항의 특성을 중심으로 분석하였다. 연구결과: 첫째, 청각장애대학생의 청각장애수용은 객관적 인식과 주관적 인식이 공존한다. 둘째, 청각장애대학생의 농정체성은 청각장애 정체성 우선의 가청정체성이 함께 존재하는 이중 구조이다. 셋째, 청각장애대학생의 농문화에 대한 구성요인에는 수어, 농공동체, 그리고 농인 모임에서의 활동 등이 있다. 논의 및 결론: 청각장애학교에서 수학한 청각장애대학생의 정체성은 환경적 특성이 작용하는 구조임을 이 연구에서는 제안하고 있다. Purpose: This study was conducted as a research study to find out the identity of college students with hearing impairment who studied at the schools for hearing impairment. Method: Among the hearing impaired students currently attending universities in the country, 120 students who studied at the hearing impaired school were collected. Through exploratory and confirmatory factor analysis, the focus was on the characteristics of the questionnaire. Results: The results of the study were as follows. First, objective and subjective perceptions coexisted to self-awareness of hearing impairment for hearing impaired students. Second, the deaf identity of students with hearing impairment was a dual structure in which the hearing impairment and hearing identity prioritizes the hearing impairment identity. Third, the constitutive factors for the deaf culture of students with hearing impairments included sign language, deaf communities, and activities at deaf people s groups. Conclusion: In conclusion, this study suggests that the identity of the hearing impaired students studied at the hearing impaired school is a structure in which environmental characteristics work.

초내열 합급 배기 밸브 스핀들 단조 해석 및 기계적 특성평가

최성규(S. G. Choi),오중석(J. S. Oh),정호승(H. S. Jeong),조종래(J. R. Cho) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.10

The nickel-based alloy Nimonic 80A possesses strength, and corrosion, creep and oxidation resistance at high temperature. The exhaust valves of low speed diesel engines are usually operated at temperature levels of 400-600℃ and high pressure to enhance thermal efficiency and exposed to the corrosion atmosphere by the exhaust gas. Also, the exhaust valve is subjected to repeated thermal and mechanical loads. So, the nickel-based alloy Nimonic 80A was used for the large exhaust valve spindle. It is composed a 540mm diameter head and a 125mm diameter stem. It is developed large products by hot closed-die forging. Manufacturing process analysis of the large exhaust valve spindle was simulated by closed die forging with hydraulic press and cooled in air after forging. The preform was heated to 1080℃. Numerical calculation was performed by DEFORM-2D, a commercial finite element code. Heat transfer can be coupled with the deformation analysis in a non-isothermal deformation analysis. Mechanical properties of the large exhaust valve spindle were evaluated by the variety of tests, including microstructure observation, tensile, as well as hardness and fatigue tests, were conducted to evaluate the mechanical properties for head part of exhaust valve spindle.